1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
5166
5167
5168
5169
5170
5171
5172
5173
5174
5175
5176
5177
5178
5179
5180
5181
5182
5183
5184
5185
5186
5187
5188
5189
5190
5191
5192
5193
5194
5195
5196
5197
5198
5199
5200
5201
5202
5203
5204
5205
5206
5207
5208
5209
5210
5211
5212
5213
5214
5215
5216
5217
5218
5219
5220
5221
5222
5223
5224
5225
5226
5227
5228
5229
5230
5231
5232
5233
5234
5235
5236
5237
5238
5239
5240
5241
5242
5243
5244
5245
5246
5247
5248
5249
5250
5251
5252
5253
5254
5255
5256
5257
5258
5259
5260
5261
5262
5263
5264
5265
5266
5267
5268
5269
5270
5271
5272
5273
5274
5275
5276
5277
5278
5279
5280
5281
5282
5283
5284
5285
5286
5287
5288
5289
5290
5291
5292
5293
5294
5295
5296
5297
5298
5299
5300
5301
5302
5303
5304
5305
5306
5307
5308
5309
5310
5311
5312
5313
5314
5315
5316
5317
5318
5319
5320
5321
5322
5323
5324
5325
5326
5327
5328
5329
5330
5331
5332
5333
5334
5335
5336
5337
5338
5339
5340
5341
5342
5343
5344
5345
5346
5347
5348
5349
5350
5351
5352
5353
5354
5355
5356
5357
5358
5359
5360
5361
5362
5363
5364
5365
5366
5367
5368
5369
5370
5371
5372
5373
5374
5375
5376
5377
5378
5379
5380
5381
5382
5383
5384
5385
5386
5387
5388
5389
5390
5391
5392
5393
5394
5395
5396
5397
5398
5399
5400
5401
5402
5403
5404
5405
5406
5407
5408
5409
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
5425
5426
5427
5428
5429
5430
5431
5432
5433
5434
5435
5436
5437
5438
5439
5440
5441
5442
5443
5444
5445
5446
5447
5448
5449
5450
5451
5452
5453
5454
5455
5456
5457
5458
5459
5460
5461
5462
5463
5464
5465
5466
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
5482
5483
5484
5485
5486
5487
5488
5489
5490
5491
5492
5493
5494
5495
5496
5497
5498
5499
5500
5501
5502
5503
5504
5505
5506
5507
5508
5509
5510
5511
5512
5513
5514
5515
5516
5517
5518
5519
5520
5521
5522
5523
5524
5525
5526
5527
5528
5529
5530
5531
5532
5533
5534
5535
5536
5537
5538
5539
5540
5541
5542
5543
5544
5545
5546
5547
5548
5549
5550
5551
5552
5553
5554
5555
5556
5557
5558
5559
5560
5561
5562
5563
5564
5565
5566
5567
5568
5569
5570
5571
5572
5573
5574
5575
5576
5577
5578
5579
5580
5581
5582
5583
5584
5585
5586
5587
5588
5589
5590
5591
5592
5593
5594
5595
5596
5597
5598
5599
5600
5601
5602
5603
5604
5605
5606
5607
5608
5609
5610
5611
5612
5613
5614
5615
5616
5617
5618
5619
5620
5621
5622
5623
5624
5625
5626
5627
5628
5629
5630
5631
5632
5633
5634
5635
5636
5637
5638
5639
5640
5641
5642
5643
5644
5645
5646
5647
5648
5649
5650
5651
5652
5653
5654
5655
5656
5657
5658
5659
5660
5661
5662
5663
5664
5665
5666
5667
5668
5669
5670
5671
5672
5673
5674
5675
5676
5677
5678
5679
5680
5681
5682
5683
5684
5685
5686
5687
5688
5689
5690
5691
5692
5693
5694
5695
5696
5697
5698
5699
5700
5701
5702
5703
5704
5705
5706
5707
5708
5709
5710
5711
5712
5713
5714
5715
5716
5717
5718
5719
5720
5721
5722
5723
5724
5725
5726
5727
5728
5729
5730
5731
5732
5733
5734
5735
5736
5737
5738
5739
5740
5741
5742
5743
5744
5745
5746
5747
5748
5749
5750
5751
5752
5753
5754
5755
5756
5757
5758
5759
5760
5761
5762
5763
5764
5765
5766
5767
5768
5769
5770
5771
5772
5773
5774
5775
5776
5777
5778
5779
5780
5781
5782
5783
5784
5785
5786
5787
5788
5789
5790
5791
5792
5793
5794
5795
5796
5797
5798
5799
5800
5801
5802
5803
5804
5805
5806
5807
5808
5809
5810
5811
5812
5813
5814
5815
5816
5817
5818
5819
5820
5821
5822
5823
5824
5825
5826
5827
5828
5829
5830
5831
5832
5833
5834
5835
5836
5837
5838
5839
5840
5841
5842
5843
5844
5845
5846
5847
5848
5849
5850
5851
5852
5853
5854
5855
5856
5857
5858
5859
5860
5861
5862
5863
5864
5865
5866
5867
5868
5869
5870
5871
5872
5873
5874
5875
5876
5877
5878
5879
5880
5881
5882
5883
5884
5885
5886
5887
5888
5889
5890
5891
5892
5893
5894
5895
5896
5897
5898
5899
5900
5901
5902
5903
5904
5905
5906
5907
5908
5909
5910
5911
5912
5913
5914
5915
5916
5917
5918
5919
5920
5921
5922
5923
5924
5925
5926
5927
5928
5929
5930
5931
5932
5933
5934
5935
5936
5937
5938
5939
5940
5941
5942
5943
5944
5945
5946
5947
5948
5949
5950
5951
5952
5953
5954
5955
5956
5957
5958
5959
5960
5961
5962
5963
5964
5965
5966
5967
5968
5969
5970
5971
5972
5973
5974
5975
5976
5977
5978
5979
5980
5981
5982
5983
5984
5985
5986
5987
5988
5989
5990
5991
5992
5993
5994
5995
5996
5997
5998
5999
6000
6001
6002
6003
6004
6005
6006
6007
6008
6009
6010
6011
6012
6013
6014
6015
6016
6017
6018
6019
6020
6021
6022
6023
6024
6025
6026
6027
6028
6029
6030
6031
6032
6033
6034
6035
6036
6037
6038
6039
6040
6041
6042
6043
6044
6045
6046
6047
6048
6049
6050
6051
6052
6053
6054
6055
6056
6057
6058
6059
6060
6061
6062
6063
6064
6065
6066
6067
6068
6069
6070
6071
6072
6073
6074
6075
6076
6077
6078
6079
6080
6081
6082
6083
6084
6085
6086
6087
6088
6089
6090
6091
6092
6093
6094
6095
6096
6097
6098
6099
6100
6101
6102
6103
6104
6105
6106
6107
6108
6109
6110
6111
6112
6113
6114
6115
6116
6117
6118
6119
6120
6121
6122
6123
6124
6125
6126
6127
6128
6129
6130
6131
6132
6133
6134
6135
6136
6137
6138
6139
6140
6141
6142
6143
6144
6145
6146
6147
6148
6149
6150
6151
6152
6153
6154
6155
6156
6157
6158
6159
6160
6161
6162
6163
6164
6165
6166
6167
6168
6169
6170
6171
6172
6173
6174
6175
6176
6177
6178
6179
6180
6181
6182
6183
6184
6185
6186
6187
6188
6189
6190
6191
6192
6193
6194
6195
6196
6197
6198
6199
6200
6201
6202
6203
6204
6205
6206
6207
6208
6209
6210
6211
6212
6213
6214
6215
6216
6217
6218
6219
6220
6221
6222
6223
6224
6225
6226
6227
6228
6229
6230
6231
6232
6233
6234
6235
6236
6237
6238
6239
6240
6241
6242
6243
6244
6245
6246
6247
6248
6249
6250
6251
6252
6253
6254
6255
6256
6257
6258
6259
6260
6261
6262
6263
6264
6265
6266
6267
6268
6269
6270
6271
6272
6273
6274
6275
6276
6277
6278
6279
6280
6281
6282
6283
6284
6285
6286
6287
6288
6289
6290
6291
6292
6293
6294
6295
6296
6297
6298
6299
6300
6301
6302
6303
6304
6305
6306
6307
6308
6309
6310
6311
6312
6313
6314
6315
6316
6317
6318
6319
6320
6321
6322
6323
6324
6325
6326
6327
6328
6329
6330
6331
6332
6333
6334
6335
6336
6337
6338
6339
6340
6341
6342
6343
6344
6345
6346
6347
6348
6349
6350
6351
6352
6353
6354
6355
6356
6357
6358
6359
6360
6361
6362
6363
6364
6365
6366
6367
6368
6369
6370
6371
6372
6373
6374
6375
6376
6377
6378
6379
6380
6381
6382
6383
6384
6385
6386
6387
6388
6389
6390
6391
6392
6393
6394
6395
6396
6397
6398
6399
6400
6401
6402
6403
6404
6405
6406
6407
6408
6409
6410
6411
6412
6413
6414
6415
6416
6417
6418
6419
6420
6421
6422
6423
6424
6425
6426
6427
6428
6429
6430
6431
6432
6433
6434
6435
6436
6437
6438
6439
6440
6441
6442
6443
6444
6445
6446
6447
6448
6449
6450
6451
6452
6453
6454
6455
6456
6457
6458
6459
6460
6461
6462
6463
6464
6465
6466
6467
6468
6469
6470
6471
6472
6473
6474
6475
6476
6477
6478
6479
6480
6481
6482
6483
6484
6485
6486
6487
6488
6489
6490
6491
6492
6493
6494
6495
6496
6497
6498
6499
6500
6501
6502
6503
6504
6505
6506
6507
6508
6509
6510
6511
6512
6513
6514
6515
6516
6517
6518
6519
6520
6521
6522
6523
6524
6525
6526
6527
6528
6529
6530
6531
6532
6533
6534
6535
6536
6537
6538
6539
6540
6541
6542
6543
6544
6545
6546
6547
6548
6549
6550
6551
6552
6553
6554
6555
6556
6557
6558
6559
6560
6561
6562
6563
6564
6565
6566
6567
6568
6569
6570
6571
6572
6573
6574
6575
6576
6577
6578
6579
6580
6581
6582
6583
6584
6585
6586
6587
6588
6589
6590
6591
6592
6593
6594
6595
6596
6597
6598
6599
6600
6601
6602
6603
6604
6605
6606
6607
6608
6609
6610
6611
6612
6613
6614
6615
6616
6617
6618
6619
6620
6621
6622
6623
6624
6625
6626
6627
6628
6629
6630
6631
6632
6633
6634
6635
6636
6637
6638
6639
6640
6641
6642
6643
6644
6645
6646
6647
6648
6649
6650
6651
6652
6653
6654
6655
6656
6657
6658
6659
6660
6661
6662
6663
6664
6665
6666
6667
6668
6669
6670
6671
6672
6673
6674
6675
6676
6677
6678
6679
6680
6681
6682
6683
6684
6685
6686
6687
6688
6689
6690
6691
6692
6693
6694
6695
6696
6697
6698
6699
6700
6701
6702
6703
6704
6705
6706
6707
6708
6709
6710
6711
6712
6713
6714
6715
6716
6717
6718
6719
6720
6721
6722
6723
6724
6725
6726
6727
6728
6729
6730
6731
6732
6733
6734
6735
6736
6737
6738
6739
6740
6741
6742
6743
6744
6745
6746
6747
6748
6749
6750
6751
6752
6753
6754
6755
6756
6757
6758
6759
6760
6761
6762
6763
6764
6765
6766
6767
6768
6769
6770
6771
6772
6773
6774
6775
6776
6777
6778
6779
6780
6781
6782
6783
6784
6785
6786
6787
6788
6789
6790
6791
6792
6793
6794
6795
6796
6797
6798
6799
6800
6801
6802
6803
6804
6805
6806
6807
6808
6809
6810
6811
6812
6813
6814
6815
6816
6817
6818
6819
6820
6821
6822
6823
6824
6825
6826
6827
6828
6829
6830
6831
6832
6833
6834
6835
6836
6837
6838
6839
6840
6841
6842
6843
6844
6845
6846
6847
6848
6849
6850
6851
6852
6853
6854
6855
6856
6857
6858
6859
6860
6861
6862
6863
6864
6865
6866
6867
6868
6869
6870
6871
6872
6873
6874
6875
6876
6877
6878
6879
6880
6881
6882
6883
6884
6885
6886
6887
6888
6889
6890
6891
6892
6893
6894
6895
6896
6897
6898
6899
6900
6901
6902
6903
6904
6905
6906
6907
6908
6909
6910
6911
6912
6913
6914
6915
6916
6917
6918
6919
6920
6921
6922
6923
6924
6925
6926
6927
6928
6929
6930
6931
6932
6933
6934
6935
6936
6937
6938
6939
6940
6941
6942
6943
6944
6945
6946
6947
6948
6949
6950
6951
6952
6953
6954
6955
6956
6957
6958
6959
6960
6961
6962
6963
6964
6965
6966
6967
6968
6969
6970
6971
6972
6973
6974
6975
6976
6977
6978
6979
6980
6981
6982
6983
6984
6985
6986
6987
6988
6989
6990
6991
6992
6993
6994
6995
6996
6997
6998
6999
7000
7001
7002
7003
7004
7005
7006
7007
7008
7009
7010
7011
7012
7013
7014
7015
7016
7017
7018
7019
7020
7021
7022
7023
7024
7025
7026
7027
7028
7029
7030
7031
7032
7033
7034
7035
7036
7037
7038
7039
7040
7041
7042
7043
7044
7045
7046
7047
7048
7049
7050
7051
7052
7053
7054
7055
7056
7057
7058
7059
7060
7061
7062
7063
7064
7065
7066
7067
7068
7069
7070
7071
7072
7073
7074
7075
7076
7077
7078
7079
7080
7081
7082
7083
7084
7085
7086
7087
7088
7089
7090
7091
7092
7093
7094
7095
7096
7097
7098
7099
7100
7101
7102
7103
7104
7105
7106
7107
7108
7109
7110
7111
7112
7113
7114
7115
7116
7117
7118
7119
7120
7121
7122
7123
7124
7125
7126
7127
7128
7129
7130
7131
7132
7133
7134
7135
7136
7137
7138
7139
7140
7141
7142
7143
7144
7145
7146
7147
7148
7149
7150
7151
7152
7153
7154
7155
7156
7157
7158
7159
7160
7161
7162
7163
7164
7165
7166
7167
7168
7169
7170
7171
7172
7173
7174
7175
7176
7177
7178
7179
7180
7181
7182
7183
7184
7185
7186
7187
7188
7189
7190
7191
7192
7193
7194
7195
7196
7197
7198
7199
7200
7201
7202
7203
7204
7205
7206
7207
7208
7209
7210
7211
7212
7213
7214
7215
7216
7217
7218
7219
7220
7221
7222
7223
7224
7225
7226
7227
7228
7229
7230
7231
7232
7233
7234
7235
7236
7237
7238
7239
7240
7241
7242
7243
7244
7245
7246
7247
7248
7249
7250
7251
7252
7253
7254
7255
7256
7257
7258
7259
7260
7261
7262
7263
7264
7265
7266
7267
7268
7269
7270
7271
7272
7273
7274
7275
7276
7277
7278
7279
7280
7281
7282
7283
7284
7285
7286
7287
7288
7289
7290
7291
7292
7293
7294
7295
7296
7297
7298
7299
7300
7301
7302
7303
7304
7305
7306
7307
7308
7309
7310
7311
7312
7313
7314
7315
7316
7317
7318
7319
7320
7321
7322
7323
7324
7325
7326
7327
7328
7329
7330
7331
7332
7333
7334
7335
7336
7337
7338
7339
7340
7341
7342
7343
7344
7345
7346
7347
7348
7349
7350
7351
7352
7353
7354
7355
7356
7357
7358
7359
7360
7361
7362
7363
7364
7365
7366
7367
7368
7369
7370
7371
7372
7373
7374
7375
7376
7377
7378
7379
7380
7381
7382
7383
7384
7385
7386
7387
7388
7389
7390
7391
7392
7393
7394
7395
7396
7397
7398
7399
7400
7401
7402
7403
7404
7405
7406
7407
7408
7409
7410
7411
7412
7413
7414
7415
7416
7417
7418
7419
7420
7421
7422
7423
7424
7425
7426
7427
7428
7429
7430
7431
7432
7433
7434
7435
7436
7437
7438
7439
7440
7441
7442
7443
7444
7445
7446
7447
7448
7449
7450
7451
7452
7453
7454
7455
7456
7457
7458
7459
7460
7461
7462
7463
7464
7465
7466
7467
7468
7469
7470
7471
7472
7473
7474
7475
7476
7477
7478
7479
7480
7481
7482
7483
7484
7485
7486
7487
7488
7489
7490
7491
7492
7493
7494
7495
7496
7497
7498
7499
7500
7501
7502
7503
7504
7505
7506
7507
7508
7509
7510
7511
7512
7513
7514
7515
7516
7517
7518
7519
7520
7521
7522
7523
7524
7525
7526
7527
7528
7529
7530
7531
7532
7533
7534
7535
7536
7537
7538
7539
7540
7541
7542
7543
7544
7545
7546
7547
7548
7549
7550
7551
7552
7553
7554
7555
7556
7557
7558
7559
7560
7561
7562
7563
7564
7565
7566
7567
7568
7569
7570
7571
7572
7573
7574
7575
7576
7577
7578
7579
7580
7581
7582
7583
7584
7585
7586
7587
7588
7589
7590
7591
7592
7593
7594
7595
7596
7597
7598
7599
7600
7601
7602
7603
7604
7605
7606
7607
7608
7609
7610
7611
7612
7613
7614
7615
7616
7617
7618
7619
7620
7621
7622
7623
7624
7625
7626
7627
7628
7629
7630
7631
7632
7633
7634
7635
7636
7637
7638
7639
7640
7641
7642
7643
7644
7645
7646
7647
7648
7649
7650
7651
7652
7653
7654
7655
7656
7657
7658
7659
7660
7661
7662
7663
7664
7665
7666
7667
7668
7669
7670
7671
7672
7673
7674
7675
7676
7677
7678
7679
7680
7681
7682
7683
7684
7685
7686
7687
7688
7689
7690
7691
7692
7693
7694
7695
7696
7697
7698
7699
7700
7701
7702
7703
7704
7705
7706
7707
7708
7709
7710
7711
7712
7713
7714
7715
7716
7717
7718
7719
7720
7721
7722
7723
7724
7725
7726
7727
7728
7729
7730
7731
7732
7733
7734
7735
7736
7737
7738
7739
7740
7741
7742
7743
7744
7745
7746
7747
7748
7749
7750
7751
7752
7753
7754
7755
7756
7757
7758
7759
7760
7761
7762
7763
7764
7765
7766
7767
7768
7769
7770
7771
7772
7773
7774
7775
7776
7777
7778
7779
7780
7781
7782
7783
7784
7785
7786
7787
7788
7789
7790
7791
7792
7793
7794
7795
7796
7797
7798
7799
7800
7801
7802
7803
7804
7805
7806
7807
7808
7809
7810
7811
7812
7813
7814
7815
7816
7817
7818
7819
7820
7821
7822
7823
7824
7825
7826
7827
7828
7829
7830
7831
7832
7833
7834
7835
7836
7837
7838
7839
7840
7841
7842
7843
7844
7845
7846
7847
7848
7849
7850
7851
7852
7853
7854
7855
7856
7857
7858
7859
7860
7861
7862
7863
7864
7865
7866
7867
7868
7869
7870
7871
7872
7873
7874
7875
7876
7877
7878
7879
7880
7881
7882
7883
7884
7885
7886
7887
7888
7889
7890
7891
7892
7893
7894
7895
7896
7897
7898
7899
7900
7901
7902
7903
7904
7905
7906
7907
7908
7909
7910
7911
7912
7913
7914
7915
7916
7917
7918
7919
7920
7921
7922
7923
7924
7925
7926
7927
7928
7929
7930
7931
7932
7933
7934
7935
7936
7937
7938
7939
7940
7941
7942
7943
7944
7945
7946
7947
7948
7949
7950
7951
7952
7953
7954
7955
7956
7957
7958
7959
7960
7961
7962
7963
7964
7965
7966
7967
7968
7969
7970
7971
7972
7973
7974
7975
7976
7977
7978
7979
7980
7981
7982
7983
7984
7985
7986
7987
7988
7989
7990
7991
7992
7993
7994
7995
7996
7997
7998
7999
8000
8001
8002
8003
8004
8005
8006
8007
8008
8009
8010
8011
8012
8013
8014
8015
8016
8017
8018
8019
8020
8021
8022
8023
8024
8025
8026
8027
8028
8029
8030
8031
8032
8033
8034
8035
8036
8037
8038
8039
8040
8041
8042
8043
8044
8045
8046
8047
8048
8049
8050
8051
8052
8053
8054
8055
8056
8057
8058
8059
8060
8061
8062
8063
8064
8065
8066
8067
8068
8069
8070
8071
8072
8073
8074
8075
8076
8077
8078
8079
8080
8081
8082
8083
8084
8085
8086
8087
8088
8089
8090
8091
8092
8093
8094
8095
8096
8097
8098
8099
8100
8101
8102
8103
8104
8105
8106
8107
8108
8109
8110
8111
8112
8113
8114
8115
8116
8117
8118
8119
8120
8121
8122
8123
8124
8125
8126
8127
8128
8129
8130
8131
8132
8133
8134
8135
8136
8137
8138
8139
8140
8141
8142
8143
8144
8145
8146
8147
8148
8149
8150
8151
8152
8153
8154
8155
8156
8157
8158
8159
8160
8161
8162
8163
8164
8165
8166
8167
8168
8169
8170
8171
8172
8173
8174
8175
8176
8177
8178
8179
8180
8181
8182
8183
8184
8185
8186
8187
8188
8189
8190
8191
8192
8193
8194
8195
8196
8197
8198
8199
8200
8201
8202
8203
8204
8205
8206
8207
8208
8209
8210
8211
8212
8213
8214
8215
8216
8217
8218
8219
8220
8221
8222
8223
8224
8225
8226
8227
8228
8229
8230
8231
8232
8233
8234
8235
8236
8237
8238
8239
8240
8241
8242
8243
8244
8245
8246
8247
8248
8249
8250
8251
8252
8253
8254
8255
8256
8257
8258
8259
8260
8261
8262
8263
8264
8265
8266
8267
8268
8269
8270
8271
8272
8273
8274
8275
8276
8277
8278
8279
8280
8281
8282
8283
8284
8285
8286
8287
8288
8289
8290
8291
8292
8293
8294
8295
8296
8297
8298
8299
8300
8301
8302
8303
8304
8305
8306
8307
8308
8309
8310
8311
8312
8313
8314
8315
8316
8317
8318
8319
8320
8321
8322
8323
8324
8325
8326
8327
8328
8329
8330
8331
8332
8333
8334
8335
8336
8337
8338
8339
8340
8341
8342
8343
8344
8345
8346
8347
8348
8349
8350
8351
8352
8353
8354
8355
8356
8357
8358
8359
8360
8361
8362
8363
8364
8365
8366
8367
8368
8369
8370
8371
8372
8373
8374
8375
8376
8377
8378
8379
8380
8381
8382
8383
8384
8385
8386
8387
8388
8389
8390
8391
8392
8393
8394
8395
8396
8397
8398
8399
8400
8401
8402
8403
8404
8405
8406
8407
8408
8409
8410
8411
8412
8413
8414
8415
8416
8417
8418
8419
8420
8421
8422
8423
8424
8425
8426
8427
8428
8429
8430
8431
8432
8433
8434
8435
8436
8437
8438
8439
8440
8441
8442
8443
8444
8445
8446
8447
8448
8449
8450
8451
8452
8453
8454
8455
8456
8457
8458
8459
8460
8461
8462
8463
8464
8465
8466
8467
8468
8469
8470
8471
8472
8473
8474
8475
8476
8477
8478
8479
8480
8481
8482
8483
8484
8485
8486
8487
8488
8489
8490
8491
8492
8493
8494
8495
8496
8497
8498
8499
8500
8501
8502
8503
8504
8505
8506
8507
8508
8509
8510
8511
8512
8513
8514
8515
8516
8517
8518
8519
8520
8521
8522
8523
8524
8525
8526
8527
8528
8529
8530
8531
8532
8533
8534
8535
8536
8537
8538
8539
8540
8541
8542
8543
8544
8545
8546
8547
8548
8549
8550
8551
8552
8553
8554
8555
8556
8557
8558
8559
8560
8561
8562
8563
8564
8565
8566
8567
8568
8569
8570
8571
8572
8573
8574
8575
8576
8577
8578
8579
8580
8581
8582
8583
8584
8585
8586
8587
8588
8589
8590
8591
8592
8593
8594
8595
8596
8597
8598
8599
8600
8601
8602
8603
8604
8605
8606
8607
8608
8609
8610
8611
8612
8613
8614
8615
8616
8617
8618
8619
8620
8621
8622
8623
8624
8625
8626
8627
8628
8629
8630
8631
8632
8633
8634
8635
8636
8637
8638
8639
8640
8641
8642
8643
8644
8645
8646
8647
8648
8649
8650
8651
8652
8653
8654
8655
8656
8657
8658
8659
8660
8661
8662
8663
8664
8665
8666
8667
8668
8669
8670
8671
8672
8673
8674
8675
8676
8677
8678
8679
8680
8681
8682
8683
8684
8685
8686
8687
8688
8689
8690
8691
8692
8693
8694
8695
8696
8697
8698
8699
8700
8701
8702
8703
8704
8705
8706
8707
8708
8709
8710
8711
8712
8713
8714
8715
8716
8717
8718
8719
8720
8721
8722
8723
8724
8725
8726
8727
8728
8729
8730
8731
8732
8733
8734
8735
8736
8737
8738
8739
8740
8741
8742
8743
8744
8745
8746
8747
8748
8749
8750
8751
8752
8753
8754
8755
8756
8757
8758
8759
8760
8761
8762
8763
8764
8765
8766
8767
8768
8769
8770
8771
8772
8773
8774
8775
8776
8777
8778
8779
8780
8781
8782
8783
8784
8785
8786
8787
8788
8789
8790
8791
8792
8793
8794
8795
8796
8797
8798
8799
8800
8801
8802
8803
8804
8805
8806
8807
8808
8809
8810
8811
8812
8813
8814
8815
8816
8817
8818
8819
8820
8821
8822
8823
8824
8825
8826
8827
8828
8829
8830
8831
8832
8833
8834
8835
8836
8837
8838
8839
8840
8841
8842
8843
8844
8845
8846
8847
8848
8849
8850
8851
8852
8853
8854
8855
8856
8857
8858
8859
8860
8861
8862
8863
8864
8865
8866
8867
8868
8869
8870
8871
8872
8873
8874
8875
8876
8877
8878
8879
8880
8881
8882
8883
8884
8885
8886
8887
8888
8889
8890
8891
8892
8893
8894
8895
8896
8897
8898
8899
8900
8901
8902
8903
8904
8905
8906
8907
8908
8909
8910
8911
8912
8913
8914
8915
8916
8917
8918
8919
8920
8921
8922
8923
8924
8925
8926
8927
8928
8929
8930
8931
8932
8933
8934
8935
8936
8937
8938
8939
8940
8941
8942
8943
8944
8945
8946
8947
8948
8949
8950
8951
8952
8953
8954
8955
8956
8957
8958
8959
8960
8961
8962
8963
8964
8965
8966
8967
8968
8969
8970
8971
8972
8973
8974
8975
8976
8977
8978
8979
8980
8981
8982
8983
8984
8985
8986
8987
8988
8989
8990
8991
8992
8993
8994
8995
8996
8997
8998
8999
9000
9001
9002
9003
9004
9005
9006
9007
9008
9009
9010
9011
9012
9013
9014
9015
9016
9017
9018
9019
9020
9021
9022
9023
9024
9025
9026
9027
9028
9029
9030
9031
9032
9033
9034
9035
9036
9037
9038
9039
9040
9041
9042
9043
9044
9045
9046
9047
9048
9049
9050
9051
9052
9053
9054
9055
9056
9057
9058
9059
9060
9061
9062
9063
9064
9065
9066
9067
9068
9069
9070
9071
9072
9073
9074
9075
9076
9077
9078
9079
9080
9081
9082
9083
9084
9085
9086
9087
9088
9089
9090
9091
9092
9093
9094
9095
9096
9097
9098
9099
9100
9101
9102
9103
9104
9105
9106
9107
9108
9109
9110
9111
9112
9113
9114
9115
9116
9117
9118
9119
9120
9121
9122
9123
9124
9125
9126
9127
9128
9129
9130
9131
9132
9133
9134
9135
9136
9137
9138
9139
9140
9141
9142
9143
9144
9145
9146
9147
9148
9149
9150
9151
9152
9153
9154
9155
9156
9157
9158
9159
9160
9161
9162
9163
9164
9165
9166
9167
9168
9169
9170
9171
9172
9173
9174
9175
9176
9177
9178
9179
9180
9181
9182
9183
9184
9185
9186
9187
9188
9189
9190
9191
9192
9193
9194
9195
9196
9197
9198
9199
9200
9201
9202
9203
9204
9205
9206
9207
9208
9209
9210
9211
9212
9213
9214
9215
9216
9217
9218
9219
9220
9221
9222
9223
9224
9225
9226
9227
9228
9229
9230
9231
9232
9233
9234
9235
9236
9237
9238
9239
9240
9241
9242
9243
9244
9245
9246
9247
9248
9249
9250
9251
9252
9253
9254
9255
9256
9257
9258
9259
9260
9261
9262
9263
9264
9265
9266
9267
9268
9269
9270
9271
9272
9273
9274
9275
9276
9277
9278
9279
9280
9281
9282
9283
9284
9285
9286
9287
9288
9289
9290
9291
9292
9293
9294
9295
9296
9297
9298
9299
9300
9301
9302
9303
9304
9305
9306
9307
9308
9309
9310
9311
9312
9313
9314
9315
9316
9317
9318
9319
9320
9321
9322
9323
9324
9325
9326
9327
9328
9329
9330
9331
9332
9333
9334
9335
9336
9337
9338
9339
9340
9341
9342
9343
9344
9345
9346
9347
9348
9349
9350
9351
9352
9353
9354
9355
9356
9357
9358
9359
9360
9361
9362
9363
9364
9365
9366
9367
9368
9369
9370
9371
9372
9373
9374
9375
9376
9377
9378
9379
9380
9381
9382
9383
9384
9385
9386
9387
9388
9389
9390
9391
9392
9393
9394
9395
9396
9397
9398
9399
9400
9401
9402
9403
9404
9405
9406
9407
9408
9409
9410
9411
9412
9413
9414
9415
9416
9417
9418
9419
9420
9421
9422
9423
9424
9425
9426
9427
9428
9429
9430
9431
9432
9433
9434
9435
9436
9437
9438
9439
9440
9441
9442
9443
9444
9445
9446
9447
9448
9449
9450
9451
9452
9453
9454
9455
9456
9457
9458
9459
9460
9461
9462
9463
9464
9465
9466
9467
9468
9469
9470
9471
9472
9473
9474
9475
9476
9477
9478
9479
9480
9481
9482
9483
9484
9485
9486
9487
9488
9489
9490
9491
9492
9493
9494
9495
9496
9497
9498
9499
9500
9501
9502
9503
9504
9505
9506
9507
9508
9509
9510
9511
9512
9513
9514
9515
9516
9517
9518
9519
9520
9521
9522
9523
9524
9525
9526
9527
9528
9529
9530
9531
9532
9533
9534
9535
9536
9537
9538
9539
9540
9541
9542
9543
9544
9545
9546
9547
9548
9549
9550
9551
9552
9553
9554
9555
9556
9557
9558
9559
9560
9561
9562
9563
9564
9565
9566
9567
9568
9569
9570
9571
9572
9573
9574
9575
9576
9577
9578
9579
9580
9581
9582
9583
9584
9585
9586
9587
9588
9589
9590
9591
9592
9593
9594
9595
9596
9597
9598
9599
9600
9601
9602
9603
9604
9605
9606
9607
9608
9609
9610
9611
9612
9613
9614
9615
9616
9617
9618
9619
9620
9621
9622
9623
9624
9625
9626
9627
9628
9629
9630
9631
9632
9633
9634
9635
9636
9637
9638
9639
9640
9641
9642
9643
9644
9645
9646
9647
9648
9649
9650
9651
9652
9653
9654
9655
9656
9657
9658
9659
9660
9661
9662
9663
9664
9665
9666
9667
9668
9669
9670
9671
9672
9673
9674
9675
9676
9677
9678
9679
9680
9681
9682
9683
9684
9685
9686
9687
9688
9689
9690
9691
9692
9693
9694
9695
9696
9697
9698
9699
9700
9701
9702
9703
9704
9705
9706
9707
9708
9709
9710
9711
9712
9713
9714
9715
9716
9717
9718
9719
9720
9721
9722
9723
9724
9725
9726
9727
9728
9729
9730
9731
9732
9733
9734
9735
9736
9737
9738
9739
9740
9741
9742
9743
9744
9745
9746
9747
9748
9749
9750
9751
9752
9753
9754
9755
9756
9757
9758
9759
9760
9761
9762
9763
9764
9765
9766
9767
9768
9769
9770
9771
9772
9773
9774
9775
9776
9777
9778
9779
9780
9781
9782
9783
9784
9785
9786
9787
9788
9789
9790
9791
9792
9793
9794
9795
9796
9797
9798
9799
9800
9801
9802
9803
9804
9805
9806
9807
9808
9809
9810
9811
9812
9813
9814
9815
9816
9817
9818
9819
9820
9821
9822
9823
9824
9825
9826
9827
9828
9829
9830
9831
9832
9833
9834
9835
9836
9837
9838
9839
9840
9841
9842
9843
9844
9845
9846
9847
9848
9849
9850
9851
9852
9853
9854
9855
9856
9857
9858
9859
9860
9861
9862
9863
9864
9865
9866
9867
9868
9869
9870
9871
9872
9873
9874
9875
9876
9877
9878
9879
9880
9881
9882
9883
9884
9885
9886
9887
9888
9889
9890
9891
9892
9893
9894
9895
9896
9897
9898
9899
9900
9901
9902
9903
9904
9905
9906
9907
9908
9909
9910
9911
9912
9913
9914
9915
9916
9917
9918
9919
9920
9921
9922
9923
9924
9925
9926
9927
9928
9929
9930
9931
9932
9933
9934
9935
9936
9937
9938
9939
9940
9941
9942
9943
9944
9945
9946
9947
9948
9949
9950
9951
9952
9953
9954
9955
9956
9957
9958
9959
9960
9961
9962
9963
9964
9965
9966
9967
9968
9969
9970
9971
9972
9973
9974
9975
9976
9977
9978
9979
9980
9981
9982
9983
9984
9985
9986
9987
9988
9989
9990
9991
9992
9993
9994
9995
9996
9997
9998
9999
10000
10001
10002
10003
10004
10005
10006
10007
10008
10009
10010
10011
10012
10013
10014
10015
10016
10017
10018
10019
10020
10021
10022
10023
10024
10025
10026
10027
10028
10029
10030
10031
10032
10033
10034
10035
10036
10037
10038
10039
10040
10041
10042
10043
10044
10045
10046
10047
10048
10049
10050
10051
10052
10053
10054
10055
10056
10057
10058
10059
10060
10061
10062
10063
10064
10065
10066
10067
10068
10069
10070
10071
10072
10073
10074
10075
10076
10077
10078
10079
10080
10081
10082
10083
10084
10085
10086
10087
10088
10089
10090
10091
10092
10093
10094
10095
10096
10097
10098
10099
10100
10101
10102
10103
10104
10105
10106
10107
10108
10109
10110
10111
10112
10113
10114
10115
10116
10117
10118
10119
10120
10121
10122
10123
10124
10125
10126
10127
10128
10129
10130
10131
10132
10133
10134
10135
10136
10137
10138
10139
10140
10141
10142
10143
10144
10145
10146
10147
10148
10149
10150
10151
10152
10153
10154
10155
10156
10157
10158
10159
10160
10161
10162
10163
10164
10165
10166
10167
10168
10169
10170
10171
10172
10173
10174
10175
10176
10177
10178
10179
10180
10181
10182
10183
10184
10185
10186
10187
10188
10189
10190
10191
10192
10193
10194
10195
10196
10197
10198
10199
10200
10201
10202
10203
10204
10205
10206
10207
10208
10209
10210
10211
10212
10213
10214
10215
10216
10217
10218
10219
10220
10221
10222
10223
10224
10225
10226
10227
10228
10229
10230
10231
10232
10233
10234
10235
10236
10237
10238
10239
10240
10241
10242
10243
10244
10245
10246
10247
10248
10249
10250
10251
10252
10253
10254
10255
10256
10257
10258
10259
10260
10261
10262
10263
10264
10265
10266
10267
10268
10269
10270
10271
10272
10273
10274
10275
10276
10277
10278
10279
10280
10281
10282
10283
10284
10285
10286
10287
10288
10289
10290
10291
10292
10293
10294
10295
10296
10297
10298
10299
10300
10301
10302
10303
10304
10305
10306
10307
10308
10309
10310
10311
10312
10313
10314
10315
10316
10317
10318
10319
10320
10321
10322
10323
10324
10325
10326
10327
10328
10329
10330
10331
10332
10333
10334
10335
10336
10337
10338
10339
10340
10341
10342
10343
10344
10345
10346
10347
10348
10349
10350
10351
10352
10353
10354
10355
10356
10357
10358
10359
10360
10361
10362
10363
10364
10365
10366
10367
10368
10369
10370
10371
10372
10373
10374
10375
10376
10377
10378
10379
10380
10381
10382
10383
10384
10385
10386
10387
10388
10389
10390
10391
10392
10393
10394
10395
10396
10397
10398
10399
10400
10401
10402
10403
10404
10405
10406
10407
10408
10409
10410
10411
10412
| | ;;; window.el --- GNU Emacs window commands aside from those written in C -*- lexical-binding:t -*-
;; Copyright (C) 1985, 1989, 1992-1994, 2000-2021 Free Software
;; Foundation, Inc.
;; Maintainer: emacs-devel@gnu.org
;; Keywords: internal
;; Package: emacs
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Window tree functions.
;;; Code:
(defun internal--before-save-selected-window ()
(cons (selected-window)
;; We save and restore all frames' selected windows, because
;; `select-window' can change the frame-selected-window of
;; whatever frame that window is in. Each text terminal's
;; top-frame is preserved by putting it last in the list.
(apply #'append
(mapcar (lambda (terminal)
(let ((frames (frames-on-display-list terminal))
(top-frame (tty-top-frame terminal))
alist)
(if top-frame
(setq frames
(cons top-frame
(delq top-frame frames))))
(dolist (f frames)
(push (cons f (frame-selected-window f))
alist))
alist))
(terminal-list)))))
(defun internal--after-save-selected-window (state)
(dolist (elt (cdr state))
(and (frame-live-p (car elt))
(window-live-p (cdr elt))
(set-frame-selected-window (car elt) (cdr elt) 'norecord)))
(when (window-live-p (car state))
(select-window (car state) 'norecord)))
(defmacro save-selected-window (&rest body)
"Execute BODY, then select the previously selected window.
The value returned is the value of the last form in BODY.
This macro saves and restores the selected window, as well as the
selected window in each frame. If the previously selected window
is no longer live, then whatever window is selected at the end of
BODY remains selected. If the previously selected window of some
frame is no longer live at the end of BODY, that frame's selected
window is left alone.
This macro saves and restores the current buffer, since otherwise
its normal operation could make a different buffer current. The
order of recently selected windows and the buffer list ordering
are not altered by this macro (unless they are altered in BODY)."
(declare (indent 0) (debug t))
`(let ((save-selected-window--state (internal--before-save-selected-window)))
(save-current-buffer
(unwind-protect
(progn ,@body)
(internal--after-save-selected-window save-selected-window--state)))))
(defvar temp-buffer-window-setup-hook nil
"Normal hook run by `with-temp-buffer-window' before buffer display.
This hook is run by `with-temp-buffer-window' with the buffer to be
displayed current.")
(defvar temp-buffer-window-show-hook nil
"Normal hook run by `with-temp-buffer-window' after buffer display.
This hook is run by `with-temp-buffer-window' with the buffer
displayed and current and its window selected.")
(defun temp-buffer-window-setup (buffer-or-name)
"Set up temporary buffer specified by BUFFER-OR-NAME.
Return the buffer."
(let ((old-dir default-directory)
(buffer (get-buffer-create buffer-or-name)))
(with-current-buffer buffer
(kill-all-local-variables)
(setq default-directory old-dir)
(delete-all-overlays)
(setq buffer-read-only nil)
(setq buffer-file-name nil)
(setq buffer-undo-list t)
(let ((inhibit-read-only t)
(inhibit-modification-hooks t))
(erase-buffer)
(run-hooks 'temp-buffer-window-setup-hook))
;; Return the buffer.
buffer)))
(defun temp-buffer-window-show (buffer &optional action)
"Show temporary buffer BUFFER in a window.
Return the window showing BUFFER. Pass ACTION as action argument
to `display-buffer'."
(let (window frame)
(with-current-buffer buffer
(set-buffer-modified-p nil)
(setq buffer-read-only t)
(goto-char (point-min))
(when (let ((window-combination-limit
;; When `window-combination-limit' equals
;; `temp-buffer' or `temp-buffer-resize' and
;; `temp-buffer-resize-mode' is enabled in this
;; buffer bind it to t so resizing steals space
;; preferably from the window that was split.
(if (or (eq window-combination-limit 'temp-buffer)
(and (eq window-combination-limit
'temp-buffer-resize)
temp-buffer-resize-mode))
t
window-combination-limit)))
(setq window (display-buffer buffer action)))
(setq frame (window-frame window))
(unless (eq frame (selected-frame))
(raise-frame frame))
(setq minibuffer-scroll-window window)
(set-window-hscroll window 0)
(with-selected-window window
(run-hooks 'temp-buffer-window-show-hook)
(when temp-buffer-resize-mode
(resize-temp-buffer-window window)))
;; Return the window.
window))))
(defmacro with-temp-buffer-window (buffer-or-name action quit-function &rest body)
"Bind `standard-output' to BUFFER-OR-NAME, eval BODY, show the buffer.
BUFFER-OR-NAME must specify either a live buffer, or the name of
a buffer (if it does not exist, this macro creates it).
Make the buffer specified by BUFFER-OR-NAME empty before running
BODY and bind `standard-output' to that buffer, so that output
generated with `prin1' and similar functions in BODY goes into
that buffer. Do not make that buffer current for running the
forms in BODY. Use `with-current-buffer-window' instead if you
need to run BODY with that buffer current.
At the end of BODY, mark the specified buffer unmodified and
read-only, and display it in a window (but do not select it).
The display happens by calling `display-buffer' passing it the
ACTION argument. If `temp-buffer-resize-mode' is enabled, the
corresponding window may be resized automatically.
Return the value returned by BODY, unless QUIT-FUNCTION specifies
a function. In that case, run that function with two arguments -
the window showing the specified buffer and the value returned by
BODY - and return the value returned by that function.
If the buffer is displayed on a new frame, the window manager may
decide to select that frame. In that case, it's usually a good
strategy if QUIT-FUNCTION selects the window showing the buffer
before reading any value from the minibuffer; for example, when
asking a `yes-or-no-p' question.
This runs the hook `temp-buffer-window-setup-hook' before BODY,
with the specified buffer temporarily current. It runs the hook
`temp-buffer-window-show-hook' after displaying the buffer, with
that buffer temporarily current, and the window that was used to
display it temporarily selected.
This construct is similar to `with-output-to-temp-buffer' but,
neither runs `temp-buffer-setup-hook' which usually puts the
buffer in Help mode, nor `temp-buffer-show-function' (the ACTION
argument replaces this)."
(declare (debug t) (indent 3))
(let ((buffer (make-symbol "buffer"))
(window (make-symbol "window"))
(value (make-symbol "value")))
(macroexp-let2* nil ((vbuffer-or-name buffer-or-name)
(vaction action)
(vquit-function quit-function))
`(let* ((,buffer (temp-buffer-window-setup ,vbuffer-or-name))
(standard-output ,buffer)
,window ,value)
(setq ,value (progn ,@body))
(with-current-buffer ,buffer
(setq ,window (temp-buffer-window-show ,buffer ,vaction)))
(if (functionp ,vquit-function)
(funcall ,vquit-function ,window ,value)
,value)))))
(defmacro with-current-buffer-window (buffer-or-name action quit-function &rest body)
"Evaluate BODY with a buffer BUFFER-OR-NAME current and show that buffer.
This construct is like `with-temp-buffer-window' but unlike that,
makes the buffer specified by BUFFER-OR-NAME current for running
BODY."
(declare (debug t) (indent 3))
(let ((buffer (make-symbol "buffer"))
(window (make-symbol "window"))
(value (make-symbol "value")))
(macroexp-let2* nil ((vbuffer-or-name buffer-or-name)
(vaction action)
(vquit-function quit-function))
`(let* ((,buffer (temp-buffer-window-setup ,vbuffer-or-name))
(standard-output ,buffer)
,window ,value)
(with-current-buffer ,buffer
(setq ,value (progn ,@body))
(setq ,window (temp-buffer-window-show ,buffer ,vaction)))
(if (functionp ,vquit-function)
(funcall ,vquit-function ,window ,value)
,value)))))
(defmacro with-displayed-buffer-window (buffer-or-name action quit-function &rest body)
"Show a buffer BUFFER-OR-NAME and evaluate BODY in that buffer.
This construct is like `with-current-buffer-window' but unlike that,
displays the buffer specified by BUFFER-OR-NAME before running BODY."
(declare (debug t) (indent 3)
(obsolete "use `with-current-buffer-window' with action alist entry `body-function'."
"28.1"))
(let ((buffer (make-symbol "buffer"))
(window (make-symbol "window"))
(value (make-symbol "value")))
(macroexp-let2* nil ((vbuffer-or-name buffer-or-name)
(vaction action)
(vquit-function quit-function))
`(let* ((,buffer (temp-buffer-window-setup ,vbuffer-or-name))
(standard-output ,buffer)
;; If a 'window-height' entry specifies a function,
;; remember it here in order to call it below but replace
;; the entry so `window--try-to-split-window' will bind
;; `window-combination-limit' to t and the function does
;; not resize any other window but the one we split this
;; one off (Bug#25055, Bug#25179).
(vheight-function
(let ((window-height (assq 'window-height (cdr ,vaction))))
(when (functionp (cdr window-height))
(cdr window-height))))
(vaction-copied
(when vheight-function
(cons (car , vaction)
(cons
'(window-height . t)
(assq-delete-all
'window-height (cdr (copy-sequence ,vaction)))))))
,window ,value)
(with-current-buffer ,buffer
(setq ,window (temp-buffer-window-show
,buffer (or vaction-copied ,vaction))))
(let ((inhibit-read-only t)
(inhibit-modification-hooks t))
(setq ,value (progn ,@body)))
(set-window-point ,window (point-min))
(when vheight-function
(ignore-errors
(set-window-parameter ,window 'preserve-size nil)
(funcall vheight-function ,window)))
(when (consp (cdr (assq 'preserve-size (cdr ,vaction))))
(window-preserve-size
,window t (cadr (assq 'preserve-size (cdr ,vaction))))
(window-preserve-size
,window nil (cddr (assq 'preserve-size (cdr ,vaction)))))
(if (functionp ,vquit-function)
(funcall ,vquit-function ,window ,value)
,value)))))
(defmacro with-window-non-dedicated (window &rest body)
"Evaluate BODY with WINDOW temporarily made non-dedicated.
If WINDOW is nil, use the selected window. Return the value of
the last form in BODY."
(declare (indent 1) (debug t))
(let ((window-dedicated-sym (gensym))
(window-sym (gensym)))
`(let* ((,window-sym (window-normalize-window ,window t))
(,window-dedicated-sym (window-dedicated-p ,window-sym)))
(set-window-dedicated-p ,window-sym nil)
(unwind-protect
(progn ,@body)
;; `window-dedicated-p' returns the value set by
;; `set-window-dedicated-p', which differentiates non-nil and
;; t, so we cannot simply use t here. That's why we use
;; `window-dedicated-sym'.
(set-window-dedicated-p ,window-sym ,window-dedicated-sym)))))
;; The following two functions are like `window-next-sibling' and
;; `window-prev-sibling' but the WINDOW argument is _not_ optional (so
;; they don't substitute the selected window for nil), and they return
;; nil when WINDOW doesn't have a parent (like a frame's root window or
;; a minibuffer window).
(defun window-right (window)
"Return WINDOW's right sibling.
Return nil if WINDOW is the root window of its frame. WINDOW can
be any window."
(and window (window-parent window) (window-next-sibling window)))
(defun window-left (window)
"Return WINDOW's left sibling.
Return nil if WINDOW is the root window of its frame. WINDOW can
be any window."
(and window (window-parent window) (window-prev-sibling window)))
(defun window-child (window)
"Return WINDOW's first child window.
WINDOW can be any window."
(or (window-top-child window) (window-left-child window)))
(defun window-child-count (window)
"Return number of WINDOW's child windows.
WINDOW can be any window."
(let ((count 0))
(when (and (windowp window) (setq window (window-child window)))
(while window
(setq count (1+ count))
(setq window (window-next-sibling window))))
count))
(defun window-last-child (window)
"Return last child window of WINDOW.
WINDOW can be any window."
(when (and (windowp window) (setq window (window-child window)))
(while (window-next-sibling window)
(setq window (window-next-sibling window))))
window)
(defun window-normalize-buffer (buffer-or-name)
"Return buffer specified by BUFFER-OR-NAME.
BUFFER-OR-NAME must be a live buffer, a string naming a live
buffer or nil which means to return the current buffer.
This function is commonly used to process the (usually optional)
\"BUFFER-OR-NAME\" argument of window related functions where nil
stands for the current buffer."
(let ((buffer
(cond
((not buffer-or-name)
(current-buffer))
((bufferp buffer-or-name)
buffer-or-name)
((stringp buffer-or-name)
(get-buffer buffer-or-name))
(t
(error "No such buffer %s" buffer-or-name)))))
(if (buffer-live-p buffer)
buffer
(error "No such live buffer %s" buffer-or-name))))
(defun window-normalize-frame (frame)
"Return frame specified by FRAME.
FRAME must be a live frame or nil which means to return the
selected frame.
This function is commonly used to process the (usually optional)
\"FRAME\" argument of window and frame related functions where
nil stands for the selected frame."
(if frame
(if (frame-live-p frame)
frame
(error "%s is not a live frame" frame))
(selected-frame)))
(defun window-normalize-window (window &optional live-only)
"Return window specified by WINDOW.
If WINDOW is nil, return the selected window. Otherwise, if
WINDOW is a live or an internal window, return WINDOW; if
LIVE-ONLY is non-nil, return WINDOW for a live window only.
Otherwise, signal an error.
This function is commonly used to process the (usually optional)
\"WINDOW\" argument of window related functions where nil stands
for the selected window."
(cond
((null window)
(selected-window))
(live-only
(if (window-live-p window)
window
(error "%s is not a live window" window)))
((window-valid-p window)
window)
(t
(error "%s is not a valid window" window))))
;; Maybe this should go to frame.el.
(defun frame-char-size (&optional window-or-frame horizontal)
"Return the value of `frame-char-height' for WINDOW-OR-FRAME.
If WINDOW-OR-FRAME is a live frame, return the value of
`frame-char-height' for that frame. If WINDOW-OR-FRAME is a
valid window, return the value of `frame-char-height' for that
window's frame. In any other case, return the value of
`frame-char-height' for the selected frame.
Optional argument HORIZONTAL non-nil means to return the value of
`frame-char-width' for WINDOW-OR-FRAME."
(let ((frame
(cond
((window-valid-p window-or-frame)
(window-frame window-or-frame))
((frame-live-p window-or-frame)
window-or-frame)
(t (selected-frame)))))
(if horizontal
(frame-char-width frame)
(frame-char-height frame))))
(defvar ignore-window-parameters nil
"If non-nil, standard functions ignore window parameters.
The functions currently affected by this are `split-window',
`delete-window', `delete-other-windows' and `other-window'.
An application may bind this to a non-nil value around calls to
these functions to inhibit processing of window parameters.")
;; This must go to C, finally (or get removed).
(defconst window-safe-min-height 1
"The absolute minimum number of lines of any window.
Anything less might crash Emacs.")
(defun window-safe-min-pixel-height (&optional window)
"Return the absolute minimum pixel height of WINDOW."
(* window-safe-min-height
(frame-char-size (window-normalize-window window))))
(defcustom window-min-height 4
"The minimum total height, in lines, of any window.
The value has to accommodate one text line, a mode and header
line, a horizontal scroll bar and a bottom divider, if present.
A value less than `window-safe-min-height' is ignored. The value
of this variable is honored when windows are resized or split.
Applications should never rebind this variable. To resize a
window to a height less than the one specified here, an
application should instead call `window-resize' with a non-nil
IGNORE argument. In order to have `split-window' make a window
shorter, explicitly specify the SIZE argument of that function."
:type 'integer
:version "24.1"
:group 'windows)
(defun window-min-pixel-height (&optional window)
"Return the minimum pixel height of window WINDOW."
(* (max (if (window-minibuffer-p window) 1 window-min-height)
window-safe-min-height)
(frame-char-size window)))
;; This must go to C, finally (or get removed).
(defconst window-safe-min-width 2
"The absolute minimum number of columns of a window.
Anything less might crash Emacs.")
(defun window-safe-min-pixel-width (&optional window)
"Return the absolute minimum pixel width of WINDOW."
(* window-safe-min-width
(frame-char-size (window-normalize-window window) t)))
(defcustom window-min-width 10
"The minimum total width, in columns, of any window.
The value has to accommodate two text columns as well as margins,
fringes, a scroll bar and a right divider, if present. A value
less than `window-safe-min-width' is ignored. The value of this
variable is honored when windows are resized or split.
Applications should never rebind this variable. To resize a
window to a width less than the one specified here, an
application should instead call `window-resize' with a non-nil
IGNORE argument. In order to have `split-window' make a window
narrower, explicitly specify the SIZE argument of that function."
:type 'integer
:version "24.1"
:group 'windows)
(defun window-min-pixel-width (&optional window)
"Return the minimum pixel width of window WINDOW."
(* (max window-min-width window-safe-min-width)
(frame-char-size window t)))
(defun window-safe-min-pixel-size (&optional window horizontal)
"Return the absolute minimum pixel height of WINDOW.
Optional argument HORIZONTAL non-nil means return the absolute
minimum pixel width of WINDOW."
(if horizontal
(window-safe-min-pixel-width window)
(window-safe-min-pixel-height window)))
(defun window-min-pixel-size (&optional window horizontal)
"Return the minimum pixel height of WINDOW.
Optional argument HORIZONTAL non-nil means return the minimum
pixel width of WINDOW."
(if horizontal
(window-min-pixel-width window)
(window-min-pixel-height window)))
(defun window-combined-p (&optional window horizontal)
"Return non-nil if WINDOW has siblings in a given direction.
WINDOW must be a valid window and defaults to the selected one.
HORIZONTAL determines a direction for the window combination. If
HORIZONTAL is omitted or nil, return non-nil if WINDOW is part of
a vertical window combination. If HORIZONTAL is non-nil, return
non-nil if WINDOW is part of a horizontal window combination."
(setq window (window-normalize-window window))
(let ((parent (window-parent window)))
(and parent
(if horizontal
(window-left-child parent)
(window-top-child parent)))))
(defun window-combination-p (&optional window horizontal)
"Return WINDOW's first child if WINDOW is a vertical combination.
WINDOW can be any window and defaults to the selected one.
Optional argument HORIZONTAL non-nil means return WINDOW's first
child if WINDOW is a horizontal combination."
(setq window (window-normalize-window window))
(if horizontal
(window-left-child window)
(window-top-child window)))
(defun window-combinations (window &optional horizontal ignore-fixed)
"Return largest number of windows vertically arranged within WINDOW.
WINDOW must be a valid window and defaults to the selected one.
If HORIZONTAL is non-nil, return the largest number of
windows horizontally arranged within WINDOW.
Optional argument IGNORE-FIXED, if non-nil, means to ignore
fixed-size windows in the calculation."
(setq window (window-normalize-window window))
(cond
((window-live-p window)
;; If WINDOW is live, return 1.
1)
((if horizontal
(window-left-child window)
(window-top-child window))
;; If WINDOW is iso-combined, return the sum of the values for all
;; child windows of WINDOW.
(let ((child (window-child window))
(count 0))
(while child
(unless (and ignore-fixed (window-size-fixed-p child horizontal))
(setq count
(+ (window-combinations child horizontal ignore-fixed)
count)))
(setq child (window-right child)))
count))
(t
;; If WINDOW is not iso-combined, return the maximum value of any
;; child window of WINDOW.
(let ((child (window-child window))
(count 1))
(while child
(unless (and ignore-fixed (window-size-fixed-p child horizontal))
(setq count
(max (window-combinations child horizontal ignore-fixed)
count)))
(setq child (window-right child)))
count))))
(defun walk-window-tree-1 (fun walk-window-tree-window any &optional sub-only)
"Helper function for `walk-window-tree' and `walk-window-subtree'."
(let (walk-window-tree-buffer)
(while walk-window-tree-window
(setq walk-window-tree-buffer
(window-buffer walk-window-tree-window))
(when (or walk-window-tree-buffer any)
(funcall fun walk-window-tree-window))
(unless walk-window-tree-buffer
(walk-window-tree-1
fun (window-left-child walk-window-tree-window) any)
(walk-window-tree-1
fun (window-top-child walk-window-tree-window) any))
(if sub-only
(setq walk-window-tree-window nil)
(setq walk-window-tree-window
(window-right walk-window-tree-window))))))
(defun walk-window-tree (fun &optional frame any minibuf)
"Run function FUN on each live window of FRAME.
FUN must be a function with one argument - a window. FRAME must
be a live frame and defaults to the selected one. ANY, if
non-nil, means to run FUN on all live and internal windows of
FRAME.
Optional argument MINIBUF t means run FUN on FRAME's minibuffer
window even if it isn't active. MINIBUF nil or omitted means run
FUN on FRAME's minibuffer window only if it's active. In either
case the minibuffer window must be part of FRAME. MINIBUF
neither nil nor t means never run FUN on the minibuffer window.
This function performs a pre-order, depth-first traversal of the
window tree. If FUN changes the window tree, the result is
unpredictable."
(let ((root (frame-root-window frame))
(mini (minibuffer-window frame)))
(setq frame (window-normalize-frame frame))
(unless (eq root mini)
(walk-window-tree-1 fun root any))
;; Run FUN on FRAME's minibuffer window if requested.
(when (and (window-live-p mini)
(eq (window-frame mini) frame)
(or (eq minibuf t)
(and (not minibuf)
(minibuffer-window-active-p mini))))
(funcall fun mini))))
(defun walk-window-subtree (fun &optional window any)
"Run function FUN on the subtree of windows rooted at WINDOW.
WINDOW defaults to the selected window. FUN must be a function
with one argument - a window. By default, run FUN only on live
windows of the subtree. If the optional argument ANY is non-nil,
run FUN on all live and internal windows of the subtree. If
WINDOW is live, run FUN on WINDOW only.
This function performs a pre-order, depth-first traversal of the
subtree rooted at WINDOW. If FUN changes that tree, the result
is unpredictable."
(setq window (window-normalize-window window))
(walk-window-tree-1 fun window any t))
(defun window-with-parameter (parameter &optional value frame any minibuf)
"Return first window on FRAME with PARAMETER non-nil.
FRAME defaults to the selected frame. Optional argument VALUE
non-nil means only return a window whose `window-parameter' value
for PARAMETER equals VALUE (comparison is done with `equal').
Optional argument ANY non-nil means consider internal windows
too.
Optional argument MINIBUF t means consider FRAME's minibuffer
window even if it isn't active. MINIBUF nil or omitted means
consider FRAME's minibuffer window only if it's active. In both
cases the minibuffer window must be part of FRAME. MINIBUF
neither nil nor t means never consider the minibuffer window."
(let (this-value)
(catch 'found
(walk-window-tree
(lambda (window)
(when (and (setq this-value (window-parameter window parameter))
(or (not value) (equal value this-value)))
(throw 'found window)))
frame any minibuf))))
;;; Atomic windows.
(defun window-atom-root (&optional window)
"Return root of atomic window WINDOW is a part of.
WINDOW must be a valid window and defaults to the selected one.
Return nil if WINDOW is not part of an atomic window."
(setq window (window-normalize-window window))
(let (root)
(while (and window (window-parameter window 'window-atom))
(setq root window)
(setq window (window-parent window)))
root))
(defun window-make-atom (window)
"Make WINDOW an atomic window.
WINDOW must be an internal window. Return WINDOW."
(if (not (window-child window))
(error "Window %s is not an internal window" window)
(walk-window-subtree
(lambda (window)
(unless (window-parameter window 'window-atom)
(set-window-parameter window 'window-atom t)))
window t)
window))
(defun display-buffer-in-atom-window (buffer alist)
"Display BUFFER in an atomic window.
This function displays BUFFER in a new window that will be
combined with an existing window to form an atomic window. If
the existing window is already part of an atomic window, add the
new window to that atomic window. Operations like `split-window'
or `delete-window', when applied to a constituent of an atomic
window, are applied atomically to the root of that atomic window.
ALIST is an association list of action symbols and values. See
Info node `(elisp) Buffer Display Action Alists' for details of
such alists. The following two symbols have a special meaning:
`window' specifies the existing window the new window shall be
combined with. Use `window-atom-root' to make the new window a
sibling of an atomic window's root. If an internal window is
specified here, all children of that window become part of the
atomic window too. If no window is specified, the new window
becomes a sibling of the selected window. By default, the
`window-atom' parameter of the existing window is set to `main'
provided the window is live and the parameter is not set yet.
`side' denotes the side of the existing window where the new
window shall be located. Valid values are `below', `right',
`above' and `left'. The default is `below'. By default, the
`window-atom' parameter of the new window is set to this value.
The return value is the new window, nil when creating that window
failed.
This is an action function for buffer display, see Info
node `(elisp) Buffer Display Action Functions'. It should be
called only by `display-buffer' or a function directly or
indirectly called by the latter."
(let* ((ignore-window-parameters t)
(window-combination-limit t)
(window-combination-resize 'atom)
(window (cdr (assq 'window alist)))
(side (or (cdr (assq 'side alist)) 'below))
(atom (when window (window-parameter window 'window-atom)))
root new)
(setq window (window-normalize-window window))
(setq root (window-atom-root window))
;; Split off new window.
(when (setq new (split-window-no-error window nil side))
(window-make-atom
(if (and root (not (eq root window)))
;; When WINDOW was part of an atomic window and we did not
;; split its root, root atomic window at old root.
root
;; Otherwise, root atomic window at WINDOW's new parent.
(window-parent window)))
;; Assign `window-atom' parameters, if needed.
(when (and (not atom) (window-live-p window))
(set-window-parameter window 'window-atom 'main))
(set-window-parameter new 'window-atom side)
;; Display BUFFER in NEW and return NEW.
(window--display-buffer buffer new 'window alist))))
(defun window--atom-check-1 (window)
"Subroutine of `window--atom-check'."
(when window
(if (window-parameter window 'window-atom)
(let ((count 0))
(when (or (catch 'reset
(walk-window-subtree
(lambda (window)
(if (window-parameter window 'window-atom)
(setq count (1+ count))
(throw 'reset t)))
window t))
;; count >= 1 must hold here. If there's no other
;; window around dissolve this atomic window.
(= count 1))
;; Dissolve atomic window.
(walk-window-subtree
(lambda (window)
(set-window-parameter window 'window-atom nil))
window t)))
;; Check children.
(unless (window-buffer window)
(window--atom-check-1 (window-left-child window))
(window--atom-check-1 (window-top-child window))))
;; Check right sibling
(window--atom-check-1 (window-right window))))
(defun window--atom-check (&optional frame)
"Check atomicity of all windows on FRAME.
FRAME defaults to the selected frame. If an atomic window is
wrongly configured, reset the atomicity of all its windows on
FRAME to nil. An atomic window is wrongly configured if it has
no child windows or one of its child windows is not atomic."
(window--atom-check-1 (frame-root-window frame)))
;; Side windows.
(defcustom window-sides-vertical nil
"If non-nil, left and right side windows occupy full frame height.
If nil, top and bottom side windows occupy full frame width."
:type 'boolean
:initialize 'custom-initialize-default
:set 'window--sides-verticalize
:group 'windows
:version "26.1")
(defcustom window-sides-reversed nil
"Whether top/bottom side windows appear in reverse order.
When this is nil, side windows on the top and bottom of a frame
are always drawn from left to right with increasing slot values.
When this is t, side windows on the top and bottom of a frame are
always drawn from right to left with increasing slot values.
When this is `bidi', the drawing order is like that for the value
t if the value of `bidi-paragraph-direction' is `right-to-left'
in the buffer most recently shown in the window selected within
the main window area of this frame.
The layout of side windows on the left or right of a frame is not
affected by the value of this variable."
:type
'(choice (const :tag "Never" nil)
(const :tag "Bidi" bidi)
(const :tag "Always" t))
:initialize 'custom-initialize-default
:set 'window--sides-reverse
:group 'windows
:version "26.1")
(defcustom window-sides-slots '(nil nil nil nil)
"Number of available side window slots on each side of a frame.
The value is a list of four elements specifying the maximum
number of side windows that may be created on the left, top,
right and bottom side of any frame.
If an element is a number, `display-buffer-in-side-window' will
refrain from making a new side window if the number of windows on
that side is equal to or exceeds that number. Rather, it will
reuse the window whose `window-slot' value is nearest to the slot
specified via its ALIST argument. If an element is nil, this
means there's no bound on the number of windows on that side."
:version "24.1"
:risky t
:type
'(list
:value (nil nil nil nil)
(choice
:tag "Left"
:help-echo "Maximum number of left side windows."
:value nil
:format "%[Left%] %v\n"
(const :tag "Unlimited" :format "%t" nil)
(integer :tag "Number" :value 2 :size 5))
(choice
:tag "Top"
:help-echo "Maximum number of top side windows."
:value nil
:format "%[Top%] %v\n"
(const :tag "Unlimited" :format "%t" nil)
(integer :tag "Number" :value 3 :size 5))
(choice
:tag "Right"
:help-echo "Maximum number of right side windows."
:value nil
:format "%[Right%] %v\n"
(const :tag "Unlimited" :format "%t" nil)
(integer :tag "Number" :value 2 :size 5))
(choice
:tag "Bottom"
:help-echo "Maximum number of bottom side windows."
:value nil
:format "%[Bottom%] %v\n"
(const :tag "Unlimited" :format "%t" nil)
(integer :tag "Number" :value 3 :size 5)))
:group 'windows)
(defvar-local window--sides-shown nil
"Non-nil if this buffer was shown in a side window once.
If this variable is non-nil in a buffer, `switch-to-prev-buffer'
and `switch-to-next-buffer' will refrain from showing this buffer
within the main window area. `display-buffer-in-side-window'
sets this variable automatically.
Killing buffer local variables after showing the buffer in a side
window annihilates any effect provided by this variable.")
(defvar window--sides-inhibit-check nil
"Non-nil means inhibit any checks on side windows.")
(defun window--sides-reverse-on-frame-p (frame)
"Return non-nil when side windows should appear reversed on FRAME.
This uses some heuristics to guess the user's intentions when the
selected window of FRAME is a side window."
(cond
;; Reverse when `window-sides-reversed' is t. Do not reverse when
;; `window-sides-reversed' is nil.
((memq window-sides-reversed '(nil t))
window-sides-reversed)
;; Reverse when FRAME's selected window shows a right-to-left buffer.
((let ((window (frame-selected-window frame)))
(when (and (not (window-parameter window 'window-side))
(or (not (window-minibuffer-p window))
(setq window (minibuffer-selected-window))))
(with-current-buffer (window-buffer window)
(eq bidi-paragraph-direction 'right-to-left)))))
;; Reverse when FRAME's `window-sides-main-selected-window' parameter
;; specifies a live window showing a right-to-left buffer.
((let ((window (frame-parameter
frame 'window-sides-main-selected-window)))
(when (window-live-p window)
(with-current-buffer (window-buffer window)
(eq bidi-paragraph-direction 'right-to-left)))))
;; Reverse when all windows in FRAME's main window show right-to-left
;; buffers.
(t
(catch 'found
(walk-window-subtree
(lambda (window)
(with-current-buffer (window-buffer window)
(when (eq bidi-paragraph-direction 'left-to-right)
(throw 'found nil))))
(window-main-window frame))
t))))
(defun window-main-window (&optional frame)
"Return the main window of specified FRAME.
The optional argument FRAME must be a live frame and defaults to
the selected one.
If FRAME has no side windows, return FRAME's root window.
Otherwise, return either an internal non-side window such that
all other non-side windows on FRAME descend from it, or the
single live non-side window of FRAME."
(let ((frame (window-normalize-frame frame))
main sibling)
;; Set main to the _last_ window found by `walk-window-tree' that
;; is not a side window but has a side window as its sibling.
(walk-window-tree
(lambda (window)
(and (not (window-parameter window 'window-side))
(or (and (setq sibling (window-prev-sibling window))
(window-parameter sibling 'window-side))
(and (setq sibling (window-next-sibling window))
(window-parameter sibling 'window-side)))
(setq main window)))
frame t 'nomini)
(or main (frame-root-window frame))))
(defun window--make-major-side-window-next-to (side)
"Return window to split for making a major side window.
SIDE must be one of the symbols `left', `top', `right' or
`bottom'.
This is an auxiliary function of `window--make-major-side-window'
and must not be called when a window on SIDE exists already."
(let ((root (frame-root-window))
(window--sides-inhibit-check t)
window)
;; (1) If a window on the opposite side exists, return that window's
;; sibling.
;; (2) If the new window shall span the entire side, return the
;; frame's root window.
;; (3) If a window on an orthogonal side exists, return that
;; window's sibling.
;; (4) Otherwise return the frame's root window.
(cond
((or (and (eq side 'left)
(setq window (window-with-parameter 'window-side 'right nil t)))
(and (eq side 'top)
(setq window (window-with-parameter 'window-side 'bottom nil t))))
(window-prev-sibling window))
((or (and (eq side 'right)
(setq window (window-with-parameter 'window-side 'left nil t)))
(and (eq side 'bottom)
(setq window (window-with-parameter 'window-side 'top nil t))))
(window-next-sibling window))
((memq side '(left right))
(cond
(window-sides-vertical
root)
((setq window (window-with-parameter 'window-side 'top nil t))
(window-next-sibling window))
((setq window (window-with-parameter 'window-side 'bottom nil t))
(window-prev-sibling window))
(t root)))
((memq side '(top bottom))
(cond
((not window-sides-vertical)
root)
((setq window (window-with-parameter 'window-side 'left nil t))
(window-next-sibling window))
((setq window (window-with-parameter 'window-side 'right nil t))
(window-prev-sibling window))
(t root))))))
(defun window--make-major-side-window (buffer side slot &optional alist)
"Display BUFFER in a new major side window on the selected frame.
SIDE must be one of `left', `top', `right' or `bottom'. SLOT
specifies the slot to use. ALIST is an association list of
symbols and values as passed to `display-buffer-in-side-window'.
Return the new window, nil if its creation failed.
This is an auxiliary function of `display-buffer-in-side-window'
and may be called only if no window on SIDE exists yet."
(let* ((left-or-right (memq side '(left right)))
(next-to (window--make-major-side-window-next-to side))
(on-side (cond
((eq side 'top) 'above)
((eq side 'bottom) 'below)
(t side)))
(window--sides-inhibit-check t)
;; The following two bindings will tell `split-window' to take
;; the space for the new window from the selected frame's main
;; window and not make a new parent window unless needed.
(window-combination-resize 'side)
(window-combination-limit nil)
(window (split-window-no-error next-to nil on-side))
(alist (if (assq 'dedicated alist)
alist
(cons `(dedicated . ,(or display-buffer-mark-dedicated 'side))
alist))))
(when window
;; Initialize `window-side' parameter of new window to SIDE and
;; make that parameter persistent.
(set-window-parameter window 'window-side side)
(add-to-list 'window-persistent-parameters '(window-side . writable))
;; Install `window-slot' parameter of new window and make that
;; parameter persistent.
(set-window-parameter window 'window-slot slot)
(add-to-list 'window-persistent-parameters '(window-slot . writable))
;; Auto-adjust height/width of new window unless a size has been
;; explicitly requested.
(unless (if left-or-right
(cdr (assq 'window-width alist))
(cdr (assq 'window-height alist)))
(setq alist
(cons
(cons
(if left-or-right 'window-width 'window-height)
(/ (window-total-size (frame-root-window) left-or-right)
;; By default use a fourth of the size of the frame's
;; root window.
4))
alist)))
(with-current-buffer buffer
(setq window--sides-shown t))
;; Install BUFFER in new window and return WINDOW.
(window--display-buffer buffer window 'window alist))))
(defun display-buffer-in-side-window (buffer alist)
"Display BUFFER in a side window of the selected frame.
ALIST is an association list of action symbols and values. See
Info node `(elisp) Buffer Display Action Alists' for details of
such alists. The following two symbols, when used in ALIST, have
a special meaning:
`side' denotes the side of the frame where the new window shall
be located. Valid values are `bottom', `right', `top' and
`left'. The default is `bottom'.
`slot' if non-nil, specifies the window slot where to display
BUFFER. A value of zero or nil means use the middle slot on
the specified side. A negative value means use a slot
preceding (that is, above or on the left of) the middle slot.
A positive value means use a slot following (that is, below or
on the right of) the middle slot. The default is zero.
If the current frame size or the settings of `window-sides-slots'
do not permit making a new window, a suitable existing window may
be reused and have its `window-slot' parameter value accordingly
modified.
Unless `display-buffer-mark-dedicated' is non-nil, dedicate the
side window used to BUFFER so that it does not get reused by
other `display-buffer' action functions. Return the window used
for displaying BUFFER, nil if no suitable window can be found.
This function installs the `window-side' and `window-slot'
parameters and makes them persistent. It neither modifies ALIST
nor installs any other window parameters unless they have been
explicitly provided via a `window-parameters' entry in ALIST.
This is an action function for buffer display, see Info
node `(elisp) Buffer Display Action Functions'. It should be
called only by `display-buffer' or a function directly or
indirectly called by the latter."
(let* ((side (or (cdr (assq 'side alist)) 'bottom))
(slot (or (cdr (assq 'slot alist)) 0))
(left-or-right (memq side '(left right))))
(cond
((not (memq side '(top bottom left right)))
(error "Invalid side %s specified" side))
((not (numberp slot))
(error "Invalid slot %s specified" slot)))
(let* ((major (window-with-parameter 'window-side side nil t))
;; `major' is the major window on SIDE, `windows' the list of
;; life windows on SIDE.
(reversed (window--sides-reverse-on-frame-p (selected-frame)))
(windows
(cond
((window-live-p major)
(list major))
((window-valid-p major)
(let* ((first (window-child major))
(next (window-next-sibling first))
(windows (list next first)))
(setq reversed (> (window-parameter first 'window-slot)
(window-parameter next 'window-slot)))
(while (setq next (window-next-sibling next))
(setq windows (cons next windows)))
(if reversed windows (nreverse windows))))))
(slots (when major (max 1 (window-child-count major))))
(max-slots
(nth (cond
((eq side 'left) 0)
((eq side 'top) 1)
((eq side 'right) 2)
((eq side 'bottom) 3))
window-sides-slots))
(window--sides-inhibit-check t)
(alist (if (assq 'dedicated alist)
alist
(cons `(dedicated . ,(or display-buffer-mark-dedicated 'side))
alist)))
window this-window this-slot prev-window next-window
best-window best-slot abs-slot)
(cond
((and (numberp max-slots) (<= max-slots 0))
;; No side-slots available on this side. Don't raise an error,
;; just return nil.
nil)
((not windows)
;; No major side window exists on this side, make one.
(window--make-major-side-window buffer side slot alist))
(t
;; Scan windows on SIDE.
(catch 'found
(dolist (window windows)
(setq this-slot (window-parameter window 'window-slot))
(cond
;; The following should not happen and probably be checked
;; by window--sides-check.
((not (numberp this-slot)))
((= this-slot slot)
;; A window with a matching slot has been found.
(setq this-window window)
(throw 'found t))
(t
;; Check if this window has a better slot value wrt the
;; slot of the window we want.
(setq abs-slot
(if (or (and (> this-slot 0) (> slot 0))
(and (< this-slot 0) (< slot 0)))
(abs (- slot this-slot))
(+ (abs slot) (abs this-slot))))
(unless (and best-slot (<= best-slot abs-slot))
(setq best-window window)
(setq best-slot abs-slot))
(if reversed
(cond
((<= this-slot slot)
(setq next-window window))
((not prev-window)
(setq prev-window window)))
(cond
((<= this-slot slot)
(setq prev-window window))
((not next-window)
(setq next-window window))))))))
;; `this-window' is the first window with the same SLOT.
;; `prev-window' is the window with the largest slot < SLOT. A new
;; window will be created after it.
;; `next-window' is the window with the smallest slot > SLOT. A new
;; window will be created before it.
;; `best-window' is the window with the smallest absolute difference
;; of its slot and SLOT.
(or (and this-window
;; Reuse `this-window'.
(with-current-buffer buffer
(setq window--sides-shown t))
(window--display-buffer buffer this-window 'reuse alist))
(and (or (not max-slots) (< slots max-slots))
(or (and next-window
;; Make new window before `next-window'.
(let ((next-side (if left-or-right 'above 'left))
(window-combination-resize 'side))
(setq window (split-window-no-error
next-window nil next-side))))
(and prev-window
;; Make new window after `prev-window'.
(let ((prev-side (if left-or-right 'below 'right))
(window-combination-resize 'side))
(setq window (split-window-no-error
prev-window nil prev-side)))))
(set-window-parameter window 'window-slot slot)
(with-current-buffer buffer
(setq window--sides-shown t))
(window--display-buffer buffer window 'window alist))
(and best-window
;; Reuse `best-window'.
(progn
;; Give best-window the new slot value.
(set-window-parameter best-window 'window-slot slot)
(with-current-buffer buffer
(setq window--sides-shown t))
(window--display-buffer
buffer best-window 'reuse alist)))))))))
(defun window-toggle-side-windows (&optional frame)
"Toggle display of side windows on specified FRAME.
FRAME must be a live frame and defaults to the selected one.
If FRAME has at least one side window, delete all side
windows on FRAME after saving FRAME's state in the
FRAME's `window-state' frame parameter. Otherwise,
restore any side windows recorded in FRAME's `window-state'
parameter, leaving FRAME's main window alone. Signal an
error if FRAME has no side windows and no saved state for
it is found."
(interactive)
(let* ((frame (window-normalize-frame frame))
(window--sides-inhibit-check t)
state)
(cond
((window-with-parameter 'window-side nil frame)
;; At least one side window exists. Remove all side windows after
;; saving FRAME's state in its `window-state' parameter.
(set-frame-parameter
frame 'window-state (window-state-get (frame-root-window frame)))
(let ((ignore-window-parameters t))
(delete-other-windows (window-main-window frame))))
((setq state (frame-parameter frame 'window-state))
;; A window state was saved for FRAME. Restore it and put the
;; current root window into its main window.
(let ((main-state (window-state-get (frame-root-window frame))))
(window-state-put state (frame-root-window frame) t)
(window-state-put main-state (window-main-window frame)))
(window--sides-reverse-frame frame))
(t
(error "No side windows state found")))))
(defun window--sides-reverse-all ()
"Maybe reverse side windows on all frames."
(unless window--sides-inhibit-check
(dolist (frame (frame-list))
(window--sides-reverse-frame frame))))
(defun window--sides-reverse-frame (frame)
"Maybe reverse side windows on FRAME."
(when (eq window-sides-reversed 'bidi)
(let ((window (frame-selected-window frame)))
(unless (or (window-parameter window 'window-side)
(window-minibuffer-p window))
(set-frame-parameter
frame 'window-sides-main-selected-window window))))
(window--sides-reverse-side frame 'top)
(window--sides-reverse-side frame 'bottom))
(defun window--sides-reverse-side (frame side)
"Maybe reverse windows on SIDE of FRAME."
(let ((major (window-with-parameter 'window-side side frame t))
(window--sides-inhibit-check t))
(when (and major (not (window-live-p major)))
(let* ((first (window-child major))
(reversed (> (window-parameter first 'window-slot)
(window-parameter
(window-next-sibling first) 'window-slot)))
(reverse (window--sides-reverse-on-frame-p frame)))
(unless (eq reversed reverse)
;; We have to reverse.
(let ((last (window-last-child major)))
(while (and (not (eq first last))
(not (eq first (window-next-sibling last))))
(window-swap-states first last t)
(setq first (window-next-sibling first))
(setq last (window-prev-sibling last)))))))))
(defun window--sides-reverse (symbol value)
"Helper function for customizing `window-sides-reversed'."
(set-default symbol value)
(remove-hook 'buffer-list-update-hook 'window--sides-reverse-all)
(remove-hook 'window-configuration-change-hook 'window--sides-reverse-all)
(dolist (frame (frame-list))
(set-frame-parameter frame 'window-sides-main-selected-window nil))
(when (eq value 'bidi)
(add-hook 'buffer-list-update-hook 'window--sides-reverse-all)
(add-hook 'window-configuration-change-hook 'window--sides-reverse-all))
(window--sides-reverse-all))
(defun window--sides-verticalize-frame (&optional frame)
"Maybe change side windows layout on specified FRAME."
(setq frame (window-normalize-frame frame))
(let ((window--sides-inhibit-check t)
(root (frame-root-window frame))
(main (window-main-window frame)))
(when (and (not (eq main root))
(not (eq (window-parent main) root))
(window-combined-p main window-sides-vertical))
(let* ((window--sides-inhibit-check t)
(ignore-window-parameters t)
(first (window-child root))
(first-state
(and first (window-parameter first 'window-side)
(window-state-get first)))
(last (window-last-child root))
(last-state
(and last (window-parameter last 'window-side)
(window-state-get last)))
(dummy (get-buffer-create " *dummy*"))
major)
(unwind-protect
(progn
(when first-state (delete-window first))
(when last-state (delete-window last))
(when first-state
(setq major (window--make-major-side-window
dummy (if window-sides-vertical 'top 'left) 0))
(window-state-put first-state major t))
(when last-state
(setq major (window--make-major-side-window
dummy (if window-sides-vertical 'bottom 'right) 0))
(window-state-put last-state major t)))
(kill-buffer " *dummy*"))))))
(defun window--sides-verticalize (symbol value)
"Helper function for customizing `window-sides-vertical'."
(set-default symbol value)
(dolist (frame (frame-list))
(window--sides-verticalize-frame frame)))
(defun window--sides-check-failed (frame)
"Helper function for `window--sides-check'."
(catch 'failed
;; FRAME must have a main window.
(unless (window-main-window frame)
(error "Frame %s has no main window" frame)
(throw 'failed t))
;; Now check the side windows.
(dolist (side '(left top right bottom))
(let ((window (window-with-parameter 'window-side side frame t)))
(when window
;; If WINDOW is live there must be no other window on this frame
;; with the same `window-side' parameter.
(if (window-live-p window)
(walk-window-tree
(lambda (this)
(when (and (eq (window-parameter this 'window-side) side)
(not (eq this window)))
(error "Window %s has same side %s as window %s but no common parent"
this side window)
(throw 'failed t)))
frame t 'nomini)
(walk-window-tree
(lambda (this)
(if (eq (window-parent this) window)
(unless (eq (window-parameter this 'window-side) side)
(error "Window %s has not same side %s as its parent %s"
this side window)
(throw 'failed t))
(when (and (eq (window-parameter this 'window-side) side)
(not (eq this window)))
(error "Window %s has same side %s as major side window %s but its parent is %s"
this side window (window-parent this))
(throw 'failed t))))
frame t 'nomini)))))))
(defun window--sides-check (frame)
"Check side windows configuration of FRAME.
In a valid side windows configuration there can be at most one
internal side window on each side and all its children must be
live and have the same `window-side' parameter and no other
window with the same `window-side' parameter exists on FRAME. If
there is no such internal window, there may be at most one window
with this side's `window-side' parameter on FRAME.
If the configuration is invalid, reset the `window-side'
parameters of all windows on FRAME."
(when (and (not window--sides-inhibit-check)
(window-with-parameter 'window-side nil frame t)
(window--sides-check-failed frame))
;; Reset all `window-side' parameters.
(walk-window-tree
(lambda (window)
(set-window-parameter window 'window-side nil))
frame t 'nomini)
(message "Side windows configuration reset for frame %s" frame)))
(defun window--check (&optional frame)
"Check atomic and side windows on FRAME.
FRAME defaults to the selected frame."
(window--sides-check frame)
(window--atom-check frame))
;; Dumping frame/window contents.
(defun window--dump-window (&optional window erase)
"Dump WINDOW to buffer *window-frame-dump*.
WINDOW must be a valid window and defaults to the selected one.
Optional argument ERASE non-nil means erase *window-frame-dump*
before writing to it."
(setq window (window-normalize-window window))
(with-current-buffer (get-buffer-create "*window-frame-dump*")
(when erase (erase-buffer))
(insert
(format "%s parent: %s\n" window (window-parent window))
(format "pixel left: %s top: %s size: %s x %s new: %s\n"
(window-pixel-left window) (window-pixel-top window)
(window-size window t t) (window-size window nil t)
(window-new-pixel window))
(format "char left: %s top: %s size: %s x %s new: %s\n"
(window-left-column window) (window-top-line window)
(window-total-size window t) (window-total-size window)
(window-new-total window))
(format "normal: %s x %s new: %s\n"
(window-normal-size window t) (window-normal-size window)
(window-new-normal window)))
(when (window-live-p window)
(let ((fringes (window-fringes window))
(margins (window-margins window)))
(insert
(format "body pixel: %s x %s char: %s x %s\n"
(window-body-width window t) (window-body-height window t)
(window-body-width window) (window-body-height window))
(format "width left fringe: %s left margin: %s right margin: %s\n"
(car fringes) (or (car margins) 0) (or (cdr margins) 0))
(format "width right fringe: %s scroll-bar: %s divider: %s\n"
(cadr fringes)
(window-scroll-bar-width window)
(window-right-divider-width window))
(format "height header-line: %s mode-line: %s divider: %s\n"
(window-header-line-height window)
(window-mode-line-height window)
(window-bottom-divider-width window)))))
(insert "\n")))
(defun window--dump-frame (&optional window-or-frame)
"Dump WINDOW-OR-FRAME to buffer *window-frame-dump*.
WINDOW-OR-FRAME can be a frame or a window and defaults to the
selected frame. When WINDOW-OR-FRAME is a window, dump that
window's frame. The buffer *window-frame-dump* is erased before
dumping to it."
(let* ((window
(cond
((or (not window-or-frame)
(frame-live-p window-or-frame))
(frame-root-window window-or-frame))
((or (window-live-p window-or-frame)
(window-child window-or-frame))
window-or-frame)
(t
(frame-root-window))))
(frame (window-frame window)))
(with-current-buffer (get-buffer-create "*window-frame-dump*")
(erase-buffer)
(insert
(format "frame pixel: %s x %s cols/lines: %s x %s units: %s x %s\n"
(frame-pixel-width frame) (frame-pixel-height frame)
(frame-total-cols frame) (frame-total-lines frame)
(frame-char-width frame) (frame-char-height frame))
(format "frame text pixel: %s x %s cols/lines: %s x %s\n"
(frame-text-width frame) (frame-text-height frame)
(frame-text-cols frame) (frame-text-lines frame))
(format "tab: %s tool: %s scroll: %s/%s fringe: %s border: %s right: %s bottom: %s\n\n"
(if (fboundp 'tab-bar-height)
(tab-bar-height frame t)
"0")
(if (fboundp 'tool-bar-height)
(tool-bar-height frame t)
"0")
(frame-scroll-bar-width frame)
(frame-scroll-bar-height frame)
(frame-fringe-width frame)
(frame-border-width frame)
(frame-right-divider-width frame)
(frame-bottom-divider-width frame)))
(walk-window-tree 'window--dump-window frame t t))))
;;; Window sizes.
(defun window-total-size (&optional window horizontal round)
"Return the total height or width of WINDOW.
WINDOW must be a valid window and defaults to the selected one.
If HORIZONTAL is omitted or nil, return the total height of
WINDOW, in lines. If WINDOW is live, its total height includes,
in addition to the height of WINDOW's text, the heights of
WINDOW's mode and header line and a bottom divider, if any.
If HORIZONTAL is non-nil, return the total width of WINDOW, in
columns. If WINDOW is live, its total width includes, in
addition to the width of WINDOW's text, the widths of WINDOW's
fringes, margins, scroll bars and its right divider, if any.
If WINDOW is internal, return the respective size of the screen
areas spanned by its children.
Optional argument ROUND is handled as for `window-total-height'
and `window-total-width'."
(if horizontal
(window-total-width window round)
(window-total-height window round)))
(defun window-size (&optional window horizontal pixelwise round)
"Return the height or width of WINDOW.
WINDOW must be a valid window and defaults to the selected one.
If HORIZONTAL is omitted or nil, return the total height of
WINDOW, in lines, like `window-total-height'. Otherwise return
the total width, in columns, like `window-total-width'.
Optional argument PIXELWISE means return the pixel size of WINDOW
like `window-pixel-height' and `window-pixel-width'.
Optional argument ROUND is ignored if PIXELWISE is non-nil and
handled as for `window-total-height' and `window-total-width'
otherwise."
(if horizontal
(if pixelwise
(window-pixel-width window)
(window-total-width window round))
(if pixelwise
(window-pixel-height window)
(window-total-height window round))))
(defvar-local window-size-fixed nil
"Non-nil in a buffer means windows displaying the buffer are fixed-size.
If the value is `height', then only the window's height is fixed.
If the value is `width', then only the window's width is fixed.
Any other non-nil value fixes both the width and the height.
Emacs won't change the size of any window displaying that buffer,
unless it has no other choice (like when deleting a neighboring
window).")
(defun window--preservable-size (window &optional horizontal)
"Return height of WINDOW as `window-preserve-size' would preserve it.
Optional argument HORIZONTAL non-nil means to return the width of
WINDOW as `window-preserve-size' would preserve it."
(if horizontal
(window-body-width window t)
(+ (window-body-height window t)
(window-header-line-height window)
(window-mode-line-height window))))
(defun window-preserve-size (&optional window horizontal preserve)
"Preserve height of window WINDOW.
WINDOW must be a live window and defaults to the selected one.
Optional argument HORIZONTAL non-nil means preserve the width of
WINDOW.
PRESERVE t means to preserve the current height/width of WINDOW's
body in frame and window resizing operations whenever possible.
The height/width of WINDOW will change only if Emacs has no other
choice. Resizing a window whose height/width is preserved never
throws an error.
PRESERVE nil means to stop preserving the height/width of WINDOW,
lifting the respective restraint induced by a previous call of
`window-preserve-size' for WINDOW. Calling `enlarge-window',
`shrink-window', `split-window' or `fit-window-to-buffer' with
WINDOW as argument also removes the respective restraint.
Other values of PRESERVE are reserved for future use."
(setq window (window-normalize-window window t))
(let* ((parameter (window-parameter window 'window-preserved-size))
(width (nth 1 parameter))
(height (nth 2 parameter)))
(if horizontal
(set-window-parameter
window 'window-preserved-size
(list
(window-buffer window)
(and preserve (window--preservable-size window t))
height))
(set-window-parameter
window 'window-preserved-size
(list
(window-buffer window)
width
(and preserve (window--preservable-size window)))))))
(defun window-preserved-size (&optional window horizontal)
"Return preserved height of window WINDOW.
WINDOW must be a live window and defaults to the selected one.
Optional argument HORIZONTAL non-nil means to return preserved
width of WINDOW."
(setq window (window-normalize-window window t))
(let* ((parameter (window-parameter window 'window-preserved-size))
(buffer (nth 0 parameter))
(width (nth 1 parameter))
(height (nth 2 parameter)))
(when (eq buffer (window-buffer window))
(if horizontal width height))))
(defun window--preserve-size (window horizontal)
"Return non-nil when the height of WINDOW shall be preserved.
Optional argument HORIZONTAL non-nil means to return non-nil when
the width of WINDOW shall be preserved."
(let ((size (window-preserved-size window horizontal)))
(and (numberp size)
(= size (window--preservable-size window horizontal)))))
(defun window-safe-min-size (&optional window horizontal pixelwise)
"Return safe minimum size of WINDOW.
WINDOW must be a valid window and defaults to the selected one.
Optional argument HORIZONTAL non-nil means return the minimum
number of columns of WINDOW; otherwise return the minimum number
of WINDOW's lines.
Optional argument PIXELWISE non-nil means return the minimum pixel-size
of WINDOW."
(setq window (window-normalize-window window))
(if pixelwise
(if horizontal
(* window-safe-min-width
(frame-char-width (window-frame window)))
(* window-safe-min-height
(frame-char-height (window-frame window))))
(if horizontal window-safe-min-width window-safe-min-height)))
(defun window-min-size (&optional window horizontal ignore pixelwise)
"Return the minimum size of WINDOW.
WINDOW must be a valid window and defaults to the selected one.
Optional argument HORIZONTAL non-nil means return the minimum
number of columns of WINDOW; otherwise return the minimum number
of WINDOW's lines.
The optional argument IGNORE has the same meaning as for
`window-resizable'. Optional argument PIXELWISE non-nil means
return the minimum pixel-size of WINDOW."
(window--min-size-1
(window-normalize-window window) horizontal ignore pixelwise))
(defun window--min-size-ignore-p (window ignore)
"Return non-nil if IGNORE says to ignore size restrictions for WINDOW."
(if (window-valid-p ignore)
(eq window ignore)
(not (memq ignore '(nil preserved)))))
(defun window--min-size-1 (window horizontal ignore pixelwise)
"Internal function of `window-min-size'."
(let ((sub (window-child window)))
(if sub
(let ((value 0))
;; WINDOW is an internal window.
(if (window-combined-p sub horizontal)
;; The minimum size of an iso-combination is the sum of
;; the minimum sizes of its child windows.
(while sub
(setq value (+ value
(window--min-size-1
sub horizontal ignore pixelwise)))
(setq sub (window-right sub)))
;; The minimum size of an ortho-combination is the maximum
;; of the minimum sizes of its child windows.
(while sub
(setq value (max value
(window--min-size-1
sub horizontal ignore pixelwise)))
(setq sub (window-right sub))))
value)
(with-current-buffer (window-buffer window)
(cond
((window-size-fixed-p window horizontal ignore)
;; The minimum size of a fixed size window is its size.
(window-size window horizontal pixelwise))
((eq ignore 'safe)
;; If IGNORE equals `safe' return the safe value.
(window-safe-min-size window horizontal pixelwise))
(horizontal
;; For the minimum width of a window take fringes and
;; scroll-bars into account. This is questionable and should
;; be removed as soon as we are able to split (and resize)
;; windows such that the new (or resized) windows can get a
;; size less than the user-specified `window-min-height' and
;; `window-min-width'.
(let* ((char-size (frame-char-size window t))
(fringes (window-fringes window))
(margins (window-margins window))
;; Let the 'min-margins' parameter override the actual
;; widths of the margins. We allow any number to
;; replace the values specified by `window-margins'.
;; See bug#24193 for the rationale of this parameter.
(min-margins (window-parameter window 'min-margins))
(left-min-margin (and min-margins
(numberp (car min-margins))
(car min-margins)))
(right-min-margin (and min-margins
(numberp (cdr min-margins))
(cdr min-margins)))
(pixel-width
(+ (window-safe-min-size window t t)
(* (or left-min-margin (car margins) 0) char-size)
(* (or right-min-margin(cdr margins) 0) char-size)
(car fringes) (cadr fringes)
(window-scroll-bar-width window)
(window-right-divider-width window))))
(if pixelwise
(max
(if window-resize-pixelwise
pixel-width
;; Round up to next integral of columns.
(* (ceiling pixel-width char-size) char-size))
(if (window--min-size-ignore-p window ignore)
0
(window-min-pixel-width window)))
(max
(ceiling pixel-width char-size)
(if (window--min-size-ignore-p window ignore)
0
window-min-width)))))
((let ((char-size (frame-char-size window))
(pixel-height
(+ (window-safe-min-size window nil t)
(window-header-line-height window)
(window-scroll-bar-height window)
(window-mode-line-height window)
(window-bottom-divider-width window))))
(if pixelwise
(max
(if window-resize-pixelwise
pixel-height
;; Round up to next integral of lines.
(* (ceiling pixel-height char-size) char-size))
(if (window--min-size-ignore-p window ignore)
0
(window-min-pixel-height window)))
(max (ceiling pixel-height char-size)
(if (window--min-size-ignore-p window ignore)
0
window-min-height))))))))))
(defun window-sizable (window delta &optional horizontal ignore pixelwise)
"Return DELTA if DELTA lines can be added to WINDOW.
WINDOW must be a valid window and defaults to the selected one.
Optional argument HORIZONTAL non-nil means return DELTA if DELTA
columns can be added to WINDOW. A return value of zero means
that no lines (or columns) can be added to WINDOW.
This function looks only at WINDOW and, recursively, its child
windows. The function `window-resizable' looks at other windows
as well.
DELTA positive means WINDOW shall be enlarged by DELTA lines or
columns. If WINDOW cannot be enlarged by DELTA lines or columns
return the maximum value in the range 0..DELTA by which WINDOW
can be enlarged.
DELTA negative means WINDOW shall be shrunk by -DELTA lines or
columns. If WINDOW cannot be shrunk by -DELTA lines or columns,
return the minimum value in the range DELTA..0 by which WINDOW
can be shrunk.
The optional argument IGNORE has the same meaning as for
`window-resizable'. Optional argument PIXELWISE non-nil means
interpret DELTA as pixels."
(setq window (window-normalize-window window))
(cond
((< delta 0)
(let ((min-size (window-min-size window horizontal ignore pixelwise))
(size (window-size window horizontal pixelwise)))
(if (<= size min-size)
0
(max (- min-size size) delta))))
((> delta 0)
(if (window-size-fixed-p window horizontal ignore)
0
delta))
(t 0)))
(defun window-sizable-p (window delta &optional horizontal ignore pixelwise)
"Return t if WINDOW can be resized by DELTA lines.
WINDOW must be a valid window and defaults to the selected one.
For the meaning of the arguments of this function see the
doc-string of `window-sizable'."
(setq window (window-normalize-window window))
(if (> delta 0)
(>= (window-sizable window delta horizontal ignore pixelwise)
delta)
(<= (window-sizable window delta horizontal ignore pixelwise)
delta)))
(defun window--size-fixed-1 (window horizontal ignore)
"Internal function for `window-size-fixed-p'."
(let ((sub (window-child window)))
(catch 'fixed
(if sub
;; WINDOW is an internal window.
(if (window-combined-p sub horizontal)
;; An iso-combination is fixed size if all its child
;; windows are fixed-size.
(progn
(while sub
(unless (window--size-fixed-1 sub horizontal ignore)
;; We found a non-fixed-size child window, so
;; WINDOW's size is not fixed.
(throw 'fixed nil))
(setq sub (window-right sub)))
;; All child windows are fixed-size, so WINDOW's size is
;; fixed.
(throw 'fixed t))
;; An ortho-combination is fixed-size if at least one of its
;; child windows is fixed-size.
(while sub
(when (window--size-fixed-1 sub horizontal ignore)
;; We found a fixed-size child window, so WINDOW's size
;; is fixed.
(throw 'fixed t))
(setq sub (window-right sub))))
;; WINDOW is a live window.
(and (or (not (windowp ignore)) (not (eq window ignore)))
(or (and (not (eq ignore 'preserved))
(window--preserve-size window horizontal))
(with-current-buffer (window-buffer window)
(if horizontal
(memq window-size-fixed '(width t))
(memq window-size-fixed '(height t))))))))))
(defun window-size-fixed-p (&optional window horizontal ignore)
"Return non-nil if WINDOW's height is fixed.
WINDOW must be a valid window and defaults to the selected one.
Optional argument HORIZONTAL non-nil means return non-nil if
WINDOW's width is fixed. The optional argument IGNORE has the
same meaning as for `window-resizable'.
If this function returns nil, this does not necessarily mean that
WINDOW can be resized in the desired direction. The function
`window-resizable' can tell that."
(when (or (windowp ignore) (memq ignore '(nil preserved)))
(window--size-fixed-1
(window-normalize-window window) horizontal ignore)))
(defun window--min-delta-1 (window delta &optional horizontal ignore trail noup pixelwise)
"Internal function for `window-min-delta'."
(if (not (window-parent window))
;; If we can't go up, return zero.
0
;; Else try to find a non-fixed-size sibling of WINDOW.
(let* ((parent (window-parent window))
(sub (window-child parent)))
(catch 'done
(if (window-combined-p sub horizontal)
;; In an iso-combination throw DELTA if we find at least one
;; child window and that window is either not fixed-size or
;; we can ignore fixed-sizeness.
(let ((skip (eq trail 'after)))
(while sub
(cond
((eq sub window)
(setq skip (eq trail 'before)))
(skip)
((window-size-fixed-p sub horizontal ignore))
(t
;; We found a non-fixed-size child window.
(throw 'done delta)))
(setq sub (window-right sub))))
;; In an ortho-combination set DELTA to the minimum value by
;; which other child windows can shrink.
(while sub
(unless (eq sub window)
(setq delta
(min delta
(max (- (window-size sub horizontal pixelwise 'ceiling)
(window-min-size
sub horizontal ignore pixelwise))
0))))
(setq sub (window-right sub))))
(if noup
delta
(window--min-delta-1
parent delta horizontal ignore trail nil pixelwise))))))
(defun window-min-delta (&optional window horizontal ignore trail noup nodown pixelwise)
"Return number of lines by which WINDOW can be shrunk.
WINDOW must be a valid window and defaults to the selected one.
Return zero if WINDOW cannot be shrunk.
Optional argument HORIZONTAL non-nil means return number of
columns by which WINDOW can be shrunk.
The optional argument IGNORE has the same meaning as for
`window-resizable'. Optional argument TRAIL restricts the
windows that can be enlarged. If its value is `before', only
windows to the left of or above WINDOW can be enlarged. If it is
`after', only windows to the right of or below WINDOW can be
enlarged.
Optional argument NOUP non-nil means don't go up in the window
tree, but try to enlarge windows within WINDOW's combination
only. Optional argument NODOWN non-nil means don't check whether
WINDOW itself (and its child windows) can be shrunk; check only
whether at least one other window can be enlarged appropriately.
Optional argument PIXELWISE non-nil means return number of pixels
by which WINDOW can be shrunk."
(setq window (window-normalize-window window))
(let ((size (window-size window horizontal pixelwise 'floor))
(minimum (window-min-size window horizontal ignore pixelwise)))
(cond
(nodown
;; If NODOWN is t, try to recover the entire size of WINDOW.
(window--min-delta-1
window size horizontal ignore trail noup pixelwise))
((<= size minimum)
;; If NODOWN is nil and WINDOW's size is already at its minimum,
;; there's nothing to recover.
0)
(t
;; Otherwise, try to recover whatever WINDOW is larger than its
;; minimum size.
(window--min-delta-1
window (- size minimum) horizontal ignore trail noup pixelwise)))))
(defun frame-windows-min-size (&optional frame horizontal ignore pixelwise)
"Return minimum number of lines of FRAME's windows.
HORIZONTAL non-nil means return number of columns of FRAME's
windows. The optional argument IGNORE has the same meaning as
for `window-resizable'. PIXELWISE non-nil means return sizes in
pixels."
(setq frame (window-normalize-frame frame))
(let* ((root (frame-root-window frame))
(mini (window-next-sibling root)))
(+ (window-min-size root horizontal ignore pixelwise)
(if (and mini (not horizontal))
(window-min-size mini horizontal nil pixelwise)
0))))
(defun window--max-delta-1 (window delta &optional horizontal ignore trail noup pixelwise)
"Internal function of `window-max-delta'."
(if (not (window-parent window))
;; Can't go up. Return DELTA.
delta
(let* ((parent (window-parent window))
(sub (window-child parent)))
(catch 'fixed
(if (window-combined-p sub horizontal)
;; For an iso-combination calculate how much we can get from
;; other child windows.
(let ((skip (eq trail 'after)))
(while sub
(cond
((eq sub window)
(setq skip (eq trail 'before)))
(skip)
(t
(setq delta
(+ delta
(max
(- (window-size sub horizontal pixelwise 'floor)
(window-min-size
sub horizontal ignore pixelwise))
0)))))
(setq sub (window-right sub))))
;; For an ortho-combination throw DELTA when at least one
;; child window is fixed-size.
(while sub
(when (and (not (eq sub window))
(window-size-fixed-p sub horizontal ignore))
(throw 'fixed delta))
(setq sub (window-right sub))))
(if noup
;; When NOUP is nil, DELTA is all we can get.
delta
;; Else try with parent of WINDOW, passing the DELTA we
;; recovered so far.
(window--max-delta-1
parent delta horizontal ignore trail nil pixelwise))))))
(defun window-max-delta (&optional window horizontal ignore trail noup nodown pixelwise)
"Return maximum number of lines by which WINDOW can be enlarged.
WINDOW must be a valid window and defaults to the selected one.
The return value is zero if WINDOW cannot be enlarged.
Optional argument HORIZONTAL non-nil means return maximum number
of columns by which WINDOW can be enlarged.
The optional argument IGNORE has the same meaning as for
`window-resizable'. Optional argument TRAIL restricts the
windows that can be enlarged. If its value is `before', only
windows to the left of or above WINDOW can be enlarged. If it is
`after', only windows to the right of or below WINDOW can be
enlarged.
Optional argument NOUP non-nil means don't go up in the window
tree but try to obtain the entire space from windows within
WINDOW's combination. Optional argument NODOWN non-nil means do
not check whether WINDOW itself (and its child windows) can be
enlarged; check only whether other windows can be shrunk
appropriately.
Optional argument PIXELWISE non-nil means return number of
pixels by which WINDOW can be enlarged."
(setq window (window-normalize-window window))
(if (and (not nodown) (window-size-fixed-p window horizontal ignore))
;; With IGNORE and NOWDON nil return zero if WINDOW has fixed
;; size.
0
;; WINDOW has no fixed size.
(window--max-delta-1 window 0 horizontal ignore trail noup pixelwise)))
;; Make NOUP also inhibit the min-size check.
(defun window--resizable (window delta &optional horizontal ignore trail noup nodown pixelwise)
"Return DELTA if WINDOW can be resized vertically by DELTA lines.
WINDOW must be a valid window and defaults to the selected one.
Optional argument HORIZONTAL non-nil means return DELTA if WINDOW
can be resized horizontally by DELTA columns. A return value of
zero means that WINDOW is not resizable.
DELTA positive means WINDOW shall be enlarged by DELTA lines or
columns. If WINDOW cannot be enlarged by DELTA lines or columns,
return the maximum value in the range 0..DELTA by which WINDOW
can be enlarged.
DELTA negative means WINDOW shall be shrunk by -DELTA lines or
columns. If WINDOW cannot be shrunk by -DELTA lines or columns,
return the minimum value in the range DELTA..0 that can be used
for shrinking WINDOW.
The optional argument IGNORE has the same meaning as for
`window-resizable'. Optional argument TRAIL `before' means only
windows to the left of or below WINDOW can be shrunk. Optional
argument TRAIL `after' means only windows to the right of or
above WINDOW can be shrunk.
Optional argument NOUP non-nil means don't go up in the window
tree but check only whether space can be obtained from (or given
to) WINDOW's siblings. Optional argument NODOWN non-nil means
don't go down in the window tree. This means do not check
whether resizing would violate size restrictions of WINDOW or its
child windows.
Optional argument PIXELWISE non-nil means interpret DELTA as
number of pixels."
(setq window (window-normalize-window window))
(cond
((< delta 0)
(max (- (window-min-delta
window horizontal ignore trail noup nodown pixelwise))
delta))
((> delta 0)
(min (window-max-delta
window horizontal ignore trail noup nodown pixelwise)
delta))
(t 0)))
(defun window--resizable-p (window delta &optional horizontal ignore trail noup nodown pixelwise)
"Return t if WINDOW can be resized vertically by DELTA lines.
WINDOW must be a valid window and defaults to the selected one.
For the meaning of the arguments of this function see the
doc-string of `window--resizable'.
Optional argument PIXELWISE non-nil means interpret DELTA as
pixels."
(setq window (window-normalize-window window))
(if (> delta 0)
(>= (window--resizable
window delta horizontal ignore trail noup nodown pixelwise)
delta)
(<= (window--resizable
window delta horizontal ignore trail noup nodown pixelwise)
delta)))
(defun window-resizable (window delta &optional horizontal ignore pixelwise)
"Return DELTA if WINDOW can be resized vertically by DELTA lines.
WINDOW must be a valid window and defaults to the selected one.
Optional argument HORIZONTAL non-nil means return DELTA if WINDOW
can be resized horizontally by DELTA columns. A return value of
zero means that WINDOW is not resizable.
DELTA positive means WINDOW shall be enlarged by DELTA lines or
columns. If WINDOW cannot be enlarged by DELTA lines or columns
return the maximum value in the range 0..DELTA by which WINDOW
can be enlarged.
DELTA negative means WINDOW shall be shrunk by -DELTA lines or
columns. If WINDOW cannot be shrunk by -DELTA lines or columns,
return the minimum value in the range DELTA..0 that can be used
for shrinking WINDOW.
Optional argument IGNORE, if non-nil, means to ignore restraints
induced by fixed size windows or the values of the variables
`window-min-height' and `window-min-width'. The following values
have special meanings: `safe' means that in addition live windows
are allowed to get as small as `window-safe-min-height' lines and
`window-safe-min-width' columns. `preserved' means to ignore
only restrictions induced by `window-preserve-size'. If IGNORE
is a window, then ignore restrictions for that window only.
Optional argument PIXELWISE non-nil means interpret DELTA as
pixels."
(setq window (window-normalize-window window))
(window--resizable window delta horizontal ignore nil nil nil pixelwise))
(defun window-resizable-p (window delta &optional horizontal ignore pixelwise)
"Return t if WINDOW can be resized vertically by DELTA lines.
WINDOW must be a valid window and defaults to the selected one.
For the meaning of the arguments of this function see the
doc-string of `window-resizable'."
(setq window (window-normalize-window window))
(if (> delta 0)
(>= (window--resizable
window delta horizontal ignore nil nil nil pixelwise)
delta)
(<= (window--resizable
window delta horizontal ignore nil nil nil pixelwise)
delta)))
;; Aliases of functions defined in window.c.
(defalias 'window-height 'window-total-height)
(defalias 'window-width 'window-body-width)
(defalias 'window-pixel-width-before-size-change 'window-old-pixel-width)
(defalias 'window-pixel-height-before-size-change 'window-old-pixel-height)
(defun window-full-height-p (&optional window)
"Return t if WINDOW is as high as its containing frame.
More precisely, return t if and only if the total height of
WINDOW equals the total height of the root window of WINDOW's
frame. WINDOW must be a valid window and defaults to the
selected one."
(setq window (window-normalize-window window))
(if (window-minibuffer-p window)
(eq window (frame-root-window (window-frame window)))
(= (window-pixel-height window)
(window-pixel-height (frame-root-window window)))))
(defun window-full-width-p (&optional window)
"Return t if WINDOW is as wide as its containing frame.
More precisely, return t if and only if the total width of WINDOW
equals the total width of the root window of WINDOW's frame.
WINDOW must be a valid window and defaults to the selected one."
(setq window (window-normalize-window window))
(= (window-pixel-width window)
(window-pixel-width (frame-root-window window))))
(defun window-body-size (&optional window horizontal pixelwise)
"Return the height or width of WINDOW's text area.
WINDOW must be a live window and defaults to the selected one.
If HORIZONTAL is omitted or nil, return the height of the text
area, like `window-body-height'. Otherwise, return the width of
the text area, like `window-body-width'. In either case, the
optional argument PIXELWISE is passed to the functions."
(if horizontal
(window-body-width window pixelwise)
(window-body-height window pixelwise)))
(declare-function font-info "font.c" (name &optional frame))
(defun window-font-width (&optional window face)
"Return average character width for the font of FACE used in WINDOW.
WINDOW must be a live window and defaults to the selected one.
If FACE is nil or omitted, the default face is used. If FACE is
remapped (see `face-remapping-alist'), the function returns the
information for the remapped face."
(with-selected-window (window-normalize-window window t)
(if (display-multi-font-p)
(let* ((face (if face face 'default))
(info (font-info (face-font face)))
(width (aref info 11)))
(if (> width 0)
width
(aref info 10)))
(frame-char-width))))
(defun window-font-height (&optional window face)
"Return character height for the font of FACE used in WINDOW.
WINDOW must be a live window and defaults to the selected one.
If FACE is nil or omitted, the default face is used. If FACE is
remapped (see `face-remapping-alist'), the function returns the
information for the remapped face."
(with-selected-window (window-normalize-window window t)
(if (display-multi-font-p)
(let* ((face (if face face 'default))
(info (font-info (face-font face))))
(aref info 3))
(frame-char-height))))
(defvar overflow-newline-into-fringe)
(defun window-max-chars-per-line (&optional window face)
"Return the number of characters that can be displayed on one line in WINDOW.
WINDOW must be a live window and defaults to the selected one.
The character width of FACE is used for the calculation. If FACE
is nil or omitted, the default face is used. If FACE is
remapped (see `face-remapping-alist'), the function uses the
remapped face.
This function is different from `window-body-width' in two
ways. First, it accounts for the portions of the line reserved
for the continuation glyph. Second, it accounts for the size of
the font."
(with-selected-window (window-normalize-window window t)
(let* ((window-width (window-body-width window t))
(font-width (window-font-width window face))
(ncols (- (/ window-width font-width)
(ceiling (line-number-display-width 'columns)))))
(if (and (display-graphic-p)
overflow-newline-into-fringe
(not
(or (eq left-fringe-width 0)
(and (null left-fringe-width)
(= (frame-parameter nil 'left-fringe) 0))))
(not
(or (eq right-fringe-width 0)
(and (null right-fringe-width)
(= (frame-parameter nil 'right-fringe) 0)))))
ncols
;; FIXME: This should remove 1 more column when there are no
;; fringes, lines are truncated, and the window is hscrolled,
;; but EOL is not in the view, because then there are 2
;; truncation glyphs, not one.
(1- ncols)))))
(defun window-current-scroll-bars (&optional window)
"Return the current scroll bar types for WINDOW.
WINDOW must be a live window and defaults to the selected one.
The return value is a cons cell (VERTICAL . HORIZONTAL) where
VERTICAL specifies the current location of the vertical scroll
bar (`left', `right' or nil), and HORIZONTAL specifies the
current location of the horizontal scroll bar (`bottom' or nil).
Unlike `window-scroll-bars', this function reports the scroll bar
type actually used, once frame defaults and `scroll-bar-mode' are
taken into account."
(setq window (window-normalize-window window t))
(let ((vertical (nth 2 (window-scroll-bars window)))
(horizontal (nth 5 (window-scroll-bars window)))
(inherited (frame-current-scroll-bars (window-frame window))))
(when (eq vertical t)
(setq vertical (car inherited)))
(when (eq horizontal t)
(setq horizontal (cdr inherited)))
(cons vertical (and horizontal 'bottom))))
(defun walk-windows (fun &optional minibuf all-frames)
"Cycle through all live windows, calling FUN for each one.
FUN must specify a function with a window as its sole argument.
The optional arguments MINIBUF and ALL-FRAMES specify the set of
windows to include in the walk.
MINIBUF t means include the minibuffer window even if the
minibuffer is not active. MINIBUF nil or omitted means include
the minibuffer window only if the minibuffer is active. Any
other value means do not include the minibuffer window even if
the minibuffer is active.
ALL-FRAMES nil or omitted means consider all windows on the
selected frame, plus the minibuffer window if specified by the
MINIBUF argument. If the minibuffer counts, consider all windows
on all frames that share that minibuffer too. The following
non-nil values of ALL-FRAMES have special meanings:
- t means consider all windows on all existing frames.
- `visible' means consider all windows on all visible frames on
the current terminal.
- 0 (the number zero) means consider all windows on all visible
and iconified frames on the current terminal.
- A frame means consider all windows on that frame only.
If ALL-FRAMES specifies a frame, the first window walked is the
first window on that frame (the one returned by `frame-first-window'),
not necessarily the selected window.
Anything else means consider all windows on the selected frame
and no others.
This function changes neither the order of recently selected
windows nor the buffer list."
;; If we start from the minibuffer window, don't fail to come
;; back to it.
(when (window-minibuffer-p)
(setq minibuf t))
;; Use `save-selected-window' to prevent FUN from messing up
;; the order of windows when it changes the selected window.
(save-selected-window
(dolist (walk-windows-window
(window-list-1 (and (framep all-frames)
(frame-first-window all-frames))
minibuf all-frames))
(funcall fun walk-windows-window))))
(defun window-at-side-p (&optional window side)
"Return t if WINDOW is at SIDE of its containing frame.
WINDOW must be a valid window and defaults to the selected one.
SIDE can be any of the symbols `left', `top', `right' or
`bottom'. The default value nil is handled like `bottom'."
(setq window (window-normalize-window window))
(let ((edge
(cond
((eq side 'left) 0)
((eq side 'top) 1)
((eq side 'right) 2)
((memq side '(bottom nil)) 3))))
(= (nth edge (window-pixel-edges window))
(nth edge (window-pixel-edges (frame-root-window window))))))
(defun window-at-side-list (&optional frame side)
"Return list of all windows on SIDE of FRAME.
FRAME must be a live frame and defaults to the selected frame.
SIDE can be any of the symbols `left', `top', `right' or
`bottom'. The default value nil is handled like `bottom'."
(setq frame (window-normalize-frame frame))
(let (windows)
(walk-window-tree
(lambda (window)
(when (window-at-side-p window side)
(setq windows (cons window windows))))
frame nil 'nomini)
(nreverse windows)))
(defun window--in-direction-2 (window posn &optional horizontal)
"Support function for `window-in-direction'."
(if horizontal
(let ((top (window-pixel-top window)))
(if (> top posn)
(- top posn)
(- posn top (window-pixel-height window))))
(let ((left (window-pixel-left window)))
(if (> left posn)
(- left posn)
(- posn left (window-pixel-width window))))))
;; Predecessors to the below have been devised by Julian Assange in
;; change-windows-intuitively.el and Hovav Shacham in windmove.el.
;; Neither of these allow one to selectively ignore specific windows
;; (windows whose `no-other-window' parameter is non-nil) as targets of
;; the movement.
(defun window-in-direction (direction &optional window ignore sign wrap minibuf)
"Return window in DIRECTION as seen from WINDOW.
More precisely, return the nearest window in direction DIRECTION
as seen from the position of `window-point' in window WINDOW.
DIRECTION should be one of `above', `below', `left' or `right'.
WINDOW must be a live window and defaults to the selected one.
Do not return a window whose `no-other-window' parameter is
non-nil. If the nearest window's `no-other-window' parameter is
non-nil, try to find another window in the indicated direction.
If, however, the optional argument IGNORE is non-nil, return that
window even if its `no-other-window' parameter is non-nil.
Optional argument SIGN a negative number means to use the right
or bottom edge of WINDOW as reference position instead of
`window-point'. SIGN a positive number means to use the left or
top edge of WINDOW as reference position.
Optional argument WRAP non-nil means to wrap DIRECTION around
frame borders. This means to return for WINDOW at the top of the
frame and DIRECTION `above' the minibuffer window if the frame
has one, and a window at the bottom of the frame otherwise.
Optional argument MINIBUF t means to return the minibuffer
window even if it isn't active. MINIBUF nil or omitted means
to return the minibuffer window if and only if it is currently active.
MINIBUF neither nil nor t means never return the minibuffer window.
However, if WRAP is non-nil, always act as if MINIBUF were nil.
Return nil if no suitable window can be found."
(setq window (window-normalize-window window t))
(cond
((eq direction 'up)
(setq direction 'above))
((eq direction 'down)
(setq direction 'below))
((not (memq direction '(above below left right)))
(error "Wrong direction %s" direction)))
(let* ((frame (window-frame window))
(hor (memq direction '(left right)))
(first (if hor
(window-pixel-left window)
(window-pixel-top window)))
(last (+ first (window-size window hor t)))
;; The column / row value of `posn-at-point' can be nil for the
;; mini-window, guard against that.
(posn
(cond
((and (numberp sign) (< sign 0))
(if hor
(1- (+ (window-pixel-top window) (window-pixel-height window)))
(1- (+ (window-pixel-left window) (window-pixel-width window)))))
((and (numberp sign) (> sign 0))
(if hor
(window-pixel-top window)
(window-pixel-left window)))
((let ((posn-cons (nth 2 (posn-at-point (window-point window) window))))
(if hor
(+ (or (cdr posn-cons) 1) (window-pixel-top window))
(+ (or (car posn-cons) 1) (window-pixel-left window)))))))
(best-edge
(cond
((eq direction 'below) (frame-pixel-height frame))
((eq direction 'right) (frame-pixel-width frame))
(t -1)))
(best-edge-2 best-edge)
(best-diff-2 (if hor (frame-pixel-height frame) (frame-pixel-width frame)))
best best-2 best-diff-2-new)
(walk-window-tree
(lambda (w)
(let* ((w-top (window-pixel-top w))
(w-left (window-pixel-left w)))
(cond
((or (eq window w)
;; Ignore ourselves.
(and (window-parameter w 'no-other-window)
;; Ignore W unless IGNORE is non-nil.
(not ignore))))
(hor
(cond
((and (<= w-top posn)
(< posn (+ w-top (window-pixel-height w))))
;; W is to the left or right of WINDOW and covers POSN.
(when (or (and (eq direction 'left)
(or (and (<= w-left first) (> w-left best-edge))
(and wrap
(window-at-side-p window 'left)
(window-at-side-p w 'right))))
(and (eq direction 'right)
(or (and (>= w-left last) (< w-left best-edge))
(and wrap
(window-at-side-p window 'right)
(window-at-side-p w 'left)))))
(setq best-edge w-left)
(setq best w)))
((and (or (and (eq direction 'left)
(<= (+ w-left (window-pixel-width w)) first))
(and (eq direction 'right) (<= last w-left)))
;; W is to the left or right of WINDOW but does not
;; cover POSN.
(setq best-diff-2-new
(window--in-direction-2 w posn hor))
(or (< best-diff-2-new best-diff-2)
(and (= best-diff-2-new best-diff-2)
(if (eq direction 'left)
(> w-left best-edge-2)
(< w-left best-edge-2)))))
(setq best-edge-2 w-left)
(setq best-diff-2 best-diff-2-new)
(setq best-2 w))))
((and (<= w-left posn)
(< posn (+ w-left (window-pixel-width w))))
;; W is above or below WINDOW and covers POSN.
(when (or (and (eq direction 'above)
(or (and (<= w-top first) (> w-top best-edge))
(and wrap
(window-at-side-p window 'top)
(if (active-minibuffer-window)
(minibuffer-window-active-p w)
(window-at-side-p w 'bottom)))))
(and (eq direction 'below)
(or (and (>= w-top first) (< w-top best-edge))
(and wrap
(if (active-minibuffer-window)
(minibuffer-window-active-p window)
(window-at-side-p window 'bottom))
(window-at-side-p w 'top)))))
(setq best-edge w-top)
(setq best w)))
((and (or (and (eq direction 'above)
(<= (+ w-top (window-pixel-height w)) first))
(and (eq direction 'below) (<= last w-top)))
;; W is above or below WINDOW but does not cover POSN.
(setq best-diff-2-new
(window--in-direction-2 w posn hor))
(or (< best-diff-2-new best-diff-2)
(and (= best-diff-2-new best-diff-2)
(if (eq direction 'above)
(> w-top best-edge-2)
(< w-top best-edge-2)))))
(setq best-edge-2 w-top)
(setq best-diff-2 best-diff-2-new)
(setq best-2 w)))))
frame nil minibuf)
(or best best-2)))
(defun get-window-with-predicate (predicate &optional minibuf all-frames default)
"Return a live window satisfying PREDICATE.
More precisely, cycle through all windows calling the function
PREDICATE on each one of them with the window as its sole
argument. Return the first window for which PREDICATE returns
non-nil. Windows are scanned starting with the window following
the selected window. If no window satisfies PREDICATE, return
DEFAULT.
MINIBUF t means include the minibuffer window even if the
minibuffer is not active. MINIBUF nil or omitted means include
the minibuffer window only if the minibuffer is active. Any
other value means do not include the minibuffer window even if
the minibuffer is active.
ALL-FRAMES nil or omitted means consider all windows on the selected
frame, plus the minibuffer window if specified by the MINIBUF
argument. If the minibuffer counts, consider all windows on all
frames that share that minibuffer too. The following non-nil
values of ALL-FRAMES have special meanings:
- t means consider all windows on all existing frames.
- `visible' means consider all windows on all visible frames on
the current terminal.
- 0 (the number zero) means consider all windows on all visible
and iconified frames on the current terminal.
- A frame means consider all windows on that frame only.
Anything else means consider all windows on the selected frame
and no others."
(catch 'found
(dolist (window (window-list-1
(next-window nil minibuf all-frames)
minibuf all-frames))
(when (funcall predicate window)
(throw 'found window)))
default))
(defalias 'some-window 'get-window-with-predicate)
(defun get-lru-window (&optional all-frames dedicated not-selected no-other)
"Return the least recently used window on frames specified by ALL-FRAMES.
Return a full-width window if possible. A minibuffer window is
never a candidate. A dedicated window is never a candidate
unless DEDICATED is non-nil, so if all windows are dedicated, the
value is nil. Avoid returning the selected window if possible.
Optional argument NOT-SELECTED non-nil means never return the
selected window. Optional argument NO-OTHER non-nil means to
never return a window whose 'no-other-window' parameter is
non-nil.
The following non-nil values of the optional argument ALL-FRAMES
have special meanings:
- t means consider all windows on all existing frames.
- `visible' means consider all windows on all visible frames on
the current terminal.
- 0 (the number zero) means consider all windows on all visible
and iconified frames on the current terminal.
- A frame means consider all windows on that frame only.
Any other value of ALL-FRAMES means consider all windows on the
selected frame and no others."
(let (best-window best-time second-best-window second-best-time time)
(dolist (window (window-list-1 nil 'nomini all-frames))
(when (and (or dedicated (not (window-dedicated-p window)))
(or (not not-selected) (not (eq window (selected-window))))
(or (not no-other)
(not (window-parameter window 'no-other-window))))
(setq time (window-use-time window))
(if (or (eq window (selected-window))
(not (window-full-width-p window)))
(when (or (not second-best-time) (< time second-best-time))
(setq second-best-time time)
(setq second-best-window window))
(when (or (not best-time) (< time best-time))
(setq best-time time)
(setq best-window window)))))
(or best-window second-best-window)))
(defun get-mru-window (&optional all-frames dedicated not-selected no-other)
"Return the most recently used window on frames specified by ALL-FRAMES.
A minibuffer window is never a candidate. A dedicated window is
never a candidate unless DEDICATED is non-nil, so if all windows
are dedicated, the value is nil. Optional argument NOT-SELECTED
non-nil means never return the selected window. Optional
argument NO-OTHER non-nil means to never return a window whose
'no-other-window' parameter is non-nil.
The following non-nil values of the optional argument ALL-FRAMES
have special meanings:
- t means consider all windows on all existing frames.
- `visible' means consider all windows on all visible frames on
the current terminal.
- 0 (the number zero) means consider all windows on all visible
and iconified frames on the current terminal.
- A frame means consider all windows on that frame only.
Any other value of ALL-FRAMES means consider all windows on the
selected frame and no others."
(let (best-window best-time time)
(dolist (window (window-list-1 nil 'nomini all-frames))
(setq time (window-use-time window))
(when (and (or dedicated (not (window-dedicated-p window)))
(or (not not-selected) (not (eq window (selected-window))))
(or (not no-other)
(not (window-parameter window 'no-other-window)))
(or (not best-time) (> time best-time)))
(setq best-time time)
(setq best-window window)))
best-window))
(defun get-largest-window (&optional all-frames dedicated not-selected no-other)
"Return the largest window on frames specified by ALL-FRAMES.
A minibuffer window is never a candidate. A dedicated window is
never a candidate unless DEDICATED is non-nil, so if all windows
are dedicated, the value is nil. Optional argument NOT-SELECTED
non-nil means never return the selected window. Optional
argument NO-OTHER non-nil means to never return a window whose
'no-other-window' parameter is non-nil.
The following non-nil values of the optional argument ALL-FRAMES
have special meanings:
- t means consider all windows on all existing frames.
- `visible' means consider all windows on all visible frames on
the current terminal.
- 0 (the number zero) means consider all windows on all visible
and iconified frames on the current terminal.
- A frame means consider all windows on that frame only.
Any other value of ALL-FRAMES means consider all windows on the
selected frame and no others."
(let ((best-size 0)
best-window size)
(dolist (window (window-list-1 nil 'nomini all-frames))
(when (and (or dedicated (not (window-dedicated-p window)))
(or (not not-selected) (not (eq window (selected-window))))
(or (not no-other)
(not (window-parameter window 'no-other-window))))
(setq size (* (window-pixel-height window)
(window-pixel-width window)))
(when (> size best-size)
(setq best-size size)
(setq best-window window))))
best-window))
(defun get-buffer-window-list (&optional buffer-or-name minibuf all-frames)
"Return list of all windows displaying BUFFER-OR-NAME, or nil if none.
BUFFER-OR-NAME may be a buffer or the name of an existing buffer
and defaults to the current buffer. If the selected window displays
BUFFER-OR-NAME, it will be the first in the resulting list.
MINIBUF t means include the minibuffer window even if the
minibuffer is not active. MINIBUF nil or omitted means include
the minibuffer window only if the minibuffer is active. Any
other value means do not include the minibuffer window even if
the minibuffer is active.
ALL-FRAMES nil or omitted means consider all windows on the
selected frame, plus the minibuffer window if specified by the
MINIBUF argument. If the minibuffer counts, consider all windows
on all frames that share that minibuffer too. The following
non-nil values of ALL-FRAMES have special meanings:
- t means consider all windows on all existing frames.
- `visible' means consider all windows on all visible frames on
the current terminal.
- 0 (the number zero) means consider all windows on all visible
and iconified frames on the current terminal.
- A frame means consider all windows on that frame only.
Anything else means consider all windows on the selected frame
and no others."
(let ((buffer (window-normalize-buffer buffer-or-name))
windows)
(dolist (window (window-list-1 (selected-window) minibuf all-frames))
(when (eq (window-buffer window) buffer)
(setq windows (cons window windows))))
(nreverse windows)))
(defun minibuffer-window-active-p (window)
"Return t if WINDOW is the currently active minibuffer window."
(and (window-live-p window) (eq window (active-minibuffer-window))))
(defun count-windows (&optional minibuf all-frames)
"Return the number of live windows on the selected frame.
The optional argument MINIBUF specifies whether the minibuffer
window is included in the count.
If ALL-FRAMES is non-nil, count the windows in all frames instead
just the selected frame.
See `walk-windows' for the precise meaning of this argument."
(length (window-list-1 nil minibuf all-frames)))
\f
;;; Resizing windows.
(defun window--size-to-pixel (window size &optional horizontal pixelwise round-maybe)
"For WINDOW convert SIZE lines to pixels.
SIZE is supposed to specify a height of WINDOW in terms of text
lines. The return value is the number of pixels specifying that
height.
WINDOW must be a valid window. Optional argument HORIZONTAL
non-nil means convert SIZE columns to pixels.
Optional argument PIXELWISE non-nil means SIZE already specifies
pixels but may have to be adjusted to a multiple of the character
size of WINDOW's frame. Optional argument ROUND-MAYBE non-nil
means round to the nearest multiple of the character size of
WINDOW's frame if the option `window-resize-pixelwise' is nil."
(setq window (window-normalize-window window))
(let ((char-size (frame-char-size window horizontal)))
(if pixelwise
(if (and round-maybe (not window-resize-pixelwise))
(* (round size char-size) char-size)
size)
(* size char-size))))
(defun window--pixel-to-total-1 (window horizontal char-size)
"Subroutine of `window--pixel-to-total'."
(let ((child (window-child window)))
(if (window-combination-p window horizontal)
;; In an iso-combination distribute sizes proportionally.
(let ((remainder (window-new-total window))
size best-child rem best-rem)
;; Initialize total sizes to each child's floor.
(while child
(setq size (max (/ (window-size child horizontal t) char-size) 1))
(set-window-new-total child size)
(setq remainder (- remainder size))
(setq child (window-next-sibling child)))
;; Distribute remainder.
(while (> remainder 0)
(setq child (window-last-child window))
(setq best-child nil)
(setq best-rem 0)
(while child
(when (and (<= (window-new-total child)
(/ (window-size child horizontal t) char-size))
(> (setq rem (% (window-size child horizontal t)
char-size))
best-rem))
(setq best-child child)
(setq best-rem rem))
(setq child (window-prev-sibling child)))
;; We MUST have a best-child here.
(set-window-new-total best-child 1 t)
(setq remainder (1- remainder)))
;; Recurse.
(setq child (window-child window))
(while child
(window--pixel-to-total-1 child horizontal char-size)
(setq child (window-next-sibling child))))
;; In an ortho-combination assign new sizes directly.
(let ((size (window-new-total window)))
(while child
(set-window-new-total child size)
(window--pixel-to-total-1 child horizontal char-size)
(setq child (window-next-sibling child)))))))
(defun window--pixel-to-total (&optional frame horizontal)
"On FRAME assign new total window heights from pixel heights.
FRAME must be a live frame and defaults to the selected frame.
Optional argument HORIZONTAL non-nil means assign new total
window widths from pixel widths."
(setq frame (window-normalize-frame frame))
(let* ((char-size (frame-char-size frame horizontal))
(root (frame-root-window frame))
(root-size (window-size root horizontal t))
;; We have to care about the minibuffer window only if it
;; appears together with the root window on this frame.
(mini (let ((mini (minibuffer-window frame)))
(and (eq (window-frame mini) frame)
(not (eq mini root)) mini)))
(mini-size (and mini (window-size mini horizontal t))))
;; We round the line/column sizes of windows here to the nearest
;; integer. In some cases this can make windows appear _larger_
;; than the containing frame (line/column-wise) because the latter's
;; sizes are not (yet) rounded. We might eventually fix that.
(if (and mini (not horizontal))
(let (lines)
(set-window-new-total root (max (/ root-size char-size) 1))
(set-window-new-total mini (max (/ mini-size char-size) 1))
(setq lines (- (round (+ root-size mini-size) char-size)
(+ (window-new-total root) (window-new-total mini))))
(while (> lines 0)
(if (>= (% root-size (window-new-total root))
(% mini-size (window-new-total mini)))
(set-window-new-total root 1 t)
(set-window-new-total mini 1 t))
(setq lines (1- lines))))
(set-window-new-total root (round root-size char-size))
(when mini
;; This is taken in the horizontal case only.
(set-window-new-total mini (round mini-size char-size))))
(unless (window-buffer root)
(window--pixel-to-total-1 root horizontal char-size))
;; Apply the new sizes.
(window-resize-apply-total frame horizontal)))
(defun window--resize-reset (&optional frame horizontal)
"Reset resize values for all windows on FRAME.
FRAME defaults to the selected frame.
This function stores the current value of `window-size' applied
with argument HORIZONTAL in the new total size of all windows on
FRAME. It also resets the new normal size of each of these
windows."
(window--resize-reset-1
(frame-root-window (window-normalize-frame frame)) horizontal))
(defun window--resize-reset-1 (window horizontal)
"Internal function of `window--resize-reset'."
;; Register old size in the new total size.
(set-window-new-pixel window (window-size window horizontal t))
(set-window-new-total window (window-size window horizontal))
;; Reset new normal size.
(set-window-new-normal window)
(when (window-child window)
(window--resize-reset-1 (window-child window) horizontal))
(when (window-right window)
(window--resize-reset-1 (window-right window) horizontal)))
;; The following is the internal function used when resizing mini
;; windows "manually", for example, when dragging a divider between
;; root and mini window. The routines for automatic minibuffer window
;; resizing call `window--resize-root-window-vertically' instead.
(defun window--resize-mini-window (window delta)
"Change height of mini window WINDOW by DELTA pixels.
If WINDOW cannot be resized by DELTA pixels make it as large (or
as small) as possible, but don't signal an error."
(when (window-minibuffer-p window)
(let* ((frame (window-frame window))
(root (frame-root-window frame))
(height (window-pixel-height window))
(min-height (+ (frame-char-height frame)
(- (window-pixel-height window)
(window-body-height window t))))
(max-delta (- (window-pixel-height root)
(window-min-size root nil nil t))))
;; Don't make mini window too small.
(when (< (+ height delta) min-height)
(setq delta (- min-height height)))
;; Don't make root window too small.
(when (> delta max-delta)
(setq delta max-delta))
(unless (zerop delta)
(window--resize-reset frame)
(window--resize-this-window root (- delta) nil nil t)
(set-window-new-pixel window (+ height delta))
;; The following routine catches the case where we want to resize
;; a minibuffer-only frame.
(when (resize-mini-window-internal window)
(window--pixel-to-total frame))))))
(defun window--resize-apply-p (frame &optional horizontal)
"Return t when a window on FRAME shall be resized vertically.
Optional argument HORIZONTAL non-nil means return t when a window
shall be resized horizontally."
(catch 'apply
(walk-window-tree
(lambda (window)
(unless (= (window-new-pixel window)
(window-size window horizontal t))
(throw 'apply t)))
frame t t)
nil))
(defun window-resize (window delta &optional horizontal ignore pixelwise)
"Resize WINDOW vertically by DELTA lines.
WINDOW can be an arbitrary window and defaults to the selected
one. An attempt to resize the root window of a frame will raise
an error though.
DELTA a positive number means WINDOW shall be enlarged by DELTA
lines. DELTA negative means WINDOW shall be shrunk by -DELTA
lines.
Optional argument HORIZONTAL non-nil means resize WINDOW
horizontally by DELTA columns. In this case a positive DELTA
means enlarge WINDOW by DELTA columns. DELTA negative means
WINDOW shall be shrunk by -DELTA columns.
Optional argument IGNORE, if non-nil, means to ignore restraints
induced by fixed size windows or the values of the variables
`window-min-height' and `window-min-width'. The following values
have special meanings: `safe' means that in addition live windows
are allowed to get as small as `window-safe-min-height' lines and
`window-safe-min-width' columns. `preserved' means to ignore
only restrictions induced by `window-preserve-size'. If IGNORE
is a window, then ignore restrictions for that window only.
Optional argument PIXELWISE non-nil means resize WINDOW by DELTA
pixels.
This function resizes other windows proportionally and never
deletes any windows. If you want to move only the low (right)
edge of WINDOW consider using `adjust-window-trailing-edge'
instead."
(setq window (window-normalize-window window))
(let* ((frame (window-frame window))
(minibuffer-window (minibuffer-window frame))
sibling)
(setq delta (window--size-to-pixel
window delta horizontal pixelwise t))
(cond
((eq window (frame-root-window frame))
(error "Cannot resize the root window of a frame"))
((window-minibuffer-p window)
(if horizontal
(error "Cannot resize minibuffer window horizontally")
(window--resize-mini-window window delta)))
((and (not horizontal)
(window-full-height-p window)
(eq (window-frame minibuffer-window) frame)
(or (not resize-mini-windows)
(eq minibuffer-window (active-minibuffer-window))))
;; If WINDOW is full height and either `resize-mini-windows' is
;; nil or the minibuffer window is active, resize the minibuffer
;; window.
(window--resize-mini-window minibuffer-window (- delta)))
((or (window--resizable-p
window delta horizontal ignore nil nil nil t)
(and (not ignore)
(setq ignore 'preserved)
(window--resizable-p
window delta horizontal ignore nil nil nil t)))
(window--resize-reset frame horizontal)
(window--resize-this-window window delta horizontal ignore t)
(if (and (not (eq window-combination-resize t))
(window-combined-p window horizontal)
(setq sibling (or (window-right window) (window-left window)))
(window-sizable-p
sibling (- delta) horizontal ignore t))
;; If window-combination-resize is nil, WINDOW is part of an
;; iso-combination, and WINDOW's neighboring right or left
;; sibling can be resized as requested, resize that sibling.
(let ((normal-delta
(/ (float delta)
(window-size (window-parent window) horizontal t))))
(window--resize-this-window sibling (- delta) horizontal nil t)
(set-window-new-normal
window (+ (window-normal-size window horizontal)
normal-delta))
(set-window-new-normal
sibling (- (window-normal-size sibling horizontal)
normal-delta)))
;; Otherwise, resize all other windows in the same combination.
(window--resize-siblings window delta horizontal ignore))
(when (window--resize-apply-p frame horizontal)
(if (window-resize-apply frame horizontal)
(window--pixel-to-total frame horizontal)
(error "Failed to apply resizing %s" window))))
(t
(error "Cannot resize window %s" window)))))
(defun window-resize-no-error (window delta &optional horizontal ignore pixelwise)
"Resize WINDOW vertically if it is resizable by DELTA lines.
This function is like `window-resize' but does not signal an
error when WINDOW cannot be resized. For the meaning of the
optional arguments see the documentation of `window-resize'."
(when (window--resizable-p
window delta horizontal ignore nil nil nil pixelwise)
(window-resize window delta horizontal ignore pixelwise)))
(defun window--resize-child-windows-skip-p (window)
"Return non-nil if WINDOW shall be skipped by resizing routines."
(memq (window-new-normal window) '(ignore stuck skip)))
(defun window--resize-child-windows-normal (parent horizontal window this-delta &optional trail other-delta)
"Recursively set new normal height of child windows of window PARENT.
HORIZONTAL non-nil means set the new normal width of these
windows. WINDOW specifies a child window of PARENT that has been
resized by THIS-DELTA lines (columns).
Optional argument TRAIL either `before' or `after' means set values
only for windows before or after WINDOW. Optional argument
OTHER-DELTA, a number, specifies that this many lines (columns)
have been obtained from (or returned to) an ancestor window of
PARENT in order to resize WINDOW."
(let* ((delta-normal
(if (and (= (- this-delta)
(window-size window horizontal t))
(zerop other-delta))
;; When WINDOW gets deleted and we can return its entire
;; space to its siblings, use WINDOW's normal size as the
;; normal delta.
(- (window-normal-size window horizontal))
;; In any other case calculate the normal delta from the
;; relation of THIS-DELTA to the total size of PARENT.
(/ (float this-delta)
(window-size parent horizontal t))))
(sub (window-child parent))
(parent-normal 0.0)
(skip (eq trail 'after)))
;; Set parent-normal to the sum of the normal sizes of all child
;; windows of PARENT that shall be resized, excluding only WINDOW
;; and any windows specified by the optional TRAIL argument.
(while sub
(cond
((eq sub window)
(setq skip (eq trail 'before)))
(skip)
(t
(setq parent-normal
(+ parent-normal (window-normal-size sub horizontal)))))
(setq sub (window-right sub)))
;; Set the new normal size of all child windows of PARENT from what
;; they should have contributed for recovering THIS-DELTA lines
;; (columns).
(setq sub (window-child parent))
(setq skip (eq trail 'after))
(while sub
(cond
((eq sub window)
(setq skip (eq trail 'before)))
(skip)
(t
(let ((old-normal (window-normal-size sub horizontal)))
(set-window-new-normal
sub (min 1.0 ; Don't get larger than 1.
(max (- old-normal
(* (/ old-normal parent-normal)
delta-normal))
;; Don't drop below 0.
0.0))))))
(setq sub (window-right sub)))
(when (numberp other-delta)
;; Set the new normal size of windows from what they should have
;; contributed for recovering OTHER-DELTA lines (columns).
(setq delta-normal (/ (float (window-size parent horizontal t))
(+ (window-size parent horizontal t)
other-delta)))
(setq sub (window-child parent))
(setq skip (eq trail 'after))
(while sub
(cond
((eq sub window)
(setq skip (eq trail 'before)))
(skip)
(t
(set-window-new-normal
sub (min 1.0 ; Don't get larger than 1.
(max (* (window-new-normal sub) delta-normal)
;; Don't drop below 0.
0.0)))))
(setq sub (window-right sub))))
;; Set the new normal size of WINDOW to what is left by the sum of
;; the normal sizes of its siblings.
(set-window-new-normal
window
(let ((sum 0))
(setq sub (window-child parent))
(while sub
(cond
((eq sub window))
((not (numberp (window-new-normal sub)))
(setq sum (+ sum (window-normal-size sub horizontal))))
(t
(setq sum (+ sum (window-new-normal sub)))))
(setq sub (window-right sub)))
;; Don't get larger than 1 or smaller than 0.
(min 1.0 (max (- 1.0 sum) 0.0))))))
(defun window--resize-child-windows (parent delta &optional horizontal window ignore trail edge char-size)
"Resize child windows of window PARENT vertically by DELTA pixels.
PARENT must be a vertically combined internal window.
Optional argument HORIZONTAL non-nil means resize child windows
of PARENT horizontally by DELTA pixels. In this case PARENT must
be a horizontally combined internal window.
WINDOW, if specified, must denote a child window of PARENT that
is resized by DELTA pixels.
The optional argument IGNORE has the same meaning as for
`window-resizable'.
Optional arguments TRAIL and EDGE, when non-nil, restrict the set
of windows that shall be resized. If TRAIL equals `before',
resize only windows on the left or above EDGE. If TRAIL equals
`after', resize only windows on the right or below EDGE. Also,
preferably only resize windows adjacent to EDGE.
If the optional argument CHAR-SIZE is a positive integer, it specifies
the number of pixels by which windows are incrementally resized.
If CHAR-SIZE is nil, this means to use the value of
`frame-char-height' or `frame-char-width' of WINDOW's frame.
Return the symbol `normalized' if new normal sizes have been
already set by this routine."
(let* ((first (window-child parent))
(last (window-last-child parent))
(parent-total (+ (window-size parent horizontal t)
delta))
(char-size (or char-size
(and window-resize-pixelwise 1)
(frame-char-size window horizontal)))
sub best-window best-value best-delta)
(if (and edge (memq trail '(before after))
(progn
(setq sub first)
(while (and (window-right sub)
(or (and (eq trail 'before)
(not (window--resize-child-windows-skip-p
(window-right sub))))
(and (eq trail 'after)
(window--resize-child-windows-skip-p sub))))
(setq sub (window-right sub)))
sub)
(if horizontal
(if (eq trail 'before)
(= (+ (window-pixel-left sub) (window-pixel-width sub))
edge)
(= (window-pixel-left sub) edge))
(if (eq trail 'before)
(= (+ (window-pixel-top sub) (window-pixel-height sub))
edge)
(= (window-pixel-top sub) edge)))
(window-sizable-p sub delta horizontal ignore t))
;; Resize only windows adjacent to EDGE.
(progn
(window--resize-this-window
sub delta horizontal ignore t trail edge)
(if (and window (eq (window-parent sub) parent))
(progn
;; Assign new normal sizes.
(set-window-new-normal
sub (/ (float (window-new-pixel sub)) parent-total))
(set-window-new-normal
window (- (window-normal-size window horizontal)
(- (window-new-normal sub)
(window-normal-size sub horizontal)))))
(window--resize-child-windows-normal
parent horizontal sub 0 trail delta))
;; Return 'normalized to notify `window--resize-siblings' that
;; normal sizes have been already set.
'normalized)
;; Resize all windows proportionally.
(setq sub last)
(while sub
(cond
((or (window--resize-child-windows-skip-p sub)
;; Ignore windows to skip and fixed-size child windows -
;; in the latter case make it a window to skip.
(and (not ignore)
(window-size-fixed-p sub horizontal ignore)
(set-window-new-normal sub 'ignore))))
((< delta 0)
;; When shrinking store the number of lines/cols we can get
;; from this window here together with the total/normal size
;; factor.
(set-window-new-normal
sub
(cons
;; We used to call this with NODOWN t, "fixed" 2011-05-11.
(window-min-delta sub horizontal ignore trail t nil t)
(- (/ (float (window-size sub horizontal t))
parent-total)
(window-normal-size sub horizontal)))))
((> delta 0)
;; When enlarging store the total/normal size factor only
(set-window-new-normal
sub
(- (/ (float (window-size sub horizontal t))
parent-total)
(window-normal-size sub horizontal)))))
(setq sub (window-left sub)))
(cond
((< delta 0)
;; Shrink windows by delta.
(setq best-window t)
(while (and best-window (not (zerop delta)))
(setq sub last)
(setq best-window nil)
(setq best-value nil)
(while sub
(when (and (consp (window-new-normal sub))
(not (<= (car (window-new-normal sub)) 0))
(or (not best-value)
(> (cdr (window-new-normal sub)) best-value)))
(setq best-window sub)
(setq best-value (cdr (window-new-normal sub))))
(setq sub (window-left sub)))
(when best-window
(setq best-delta (min (car (window-new-normal best-window))
char-size (- delta)))
(setq delta (+ delta best-delta))
(set-window-new-pixel best-window (- best-delta) t)
(set-window-new-normal
best-window
(if (= (car (window-new-normal best-window)) best-delta)
'skip ; We can't shrink best-window any further.
(cons (- (car (window-new-normal best-window)) best-delta)
(- (/ (float (window-new-pixel best-window))
parent-total)
(window-normal-size best-window horizontal))))))))
((> delta 0)
;; Enlarge windows by delta.
(setq best-window t)
(while (and best-window (not (zerop delta)))
(setq sub last)
(setq best-window nil)
(setq best-value nil)
(while sub
(when (and (numberp (window-new-normal sub))
(or (not best-value)
(< (window-new-normal sub) best-value)))
(setq best-window sub)
(setq best-value (window-new-normal sub)))
(setq sub (window-left sub)))
(when best-window
(setq best-delta (min delta char-size))
(setq delta (- delta best-delta))
(set-window-new-pixel best-window best-delta t)
(set-window-new-normal
best-window
(- (/ (float (window-new-pixel best-window))
parent-total)
(window-normal-size best-window horizontal)))))))
(when best-window
(setq sub last)
(while sub
(when (or (consp (window-new-normal sub))
(numberp (window-new-normal sub)))
;; Reset new normal size fields so `window-resize-apply'
;; won't use them to apply new sizes.
(set-window-new-normal sub))
(unless (eq (window-new-normal sub) 'ignore)
;; Resize this window's child windows (back-engineering
;; delta from sub's old and new total sizes).
(let ((delta (- (window-new-pixel sub)
(window-size sub horizontal t))))
(unless (and (zerop delta) (not trail))
;; For the TRAIL non-nil case we have to resize SUB
;; recursively even if it's size does not change.
(window--resize-this-window
sub delta horizontal ignore nil trail edge))))
(setq sub (window-left sub)))))))
(defun window--resize-siblings (window delta &optional horizontal ignore trail edge char-size)
"Resize other windows when WINDOW is resized vertically by DELTA pixels.
Optional argument HORIZONTAL non-nil means resize other windows
when WINDOW is resized horizontally by DELTA pixels. WINDOW
itself is not resized by this function.
The optional argument IGNORE has the same meaning as for
`window-resizable'.
Optional arguments TRAIL and EDGE, when non-nil, refine the set
of windows that shall be resized. If TRAIL equals `before',
resize only windows on the left or above EDGE. If TRAIL equals
`after', resize only windows on the right or below EDGE. Also,
preferably only resize windows adjacent to EDGE."
(when (window-parent window)
(let* ((parent (window-parent window))
(sub (window-child parent)))
(if (window-combined-p sub horizontal)
;; In an iso-combination try to extract DELTA from WINDOW's
;; siblings.
(let ((skip (eq trail 'after))
this-delta other-delta)
;; Decide which windows shall be left alone.
(while sub
(cond
((eq sub window)
;; Make sure WINDOW is left alone when
;; resizing its siblings.
(set-window-new-normal sub 'ignore)
(setq skip (eq trail 'before)))
(skip
;; Make sure this sibling is left alone when
;; resizing its siblings.
(set-window-new-normal sub 'ignore))
((not (window-size-fixed-p sub horizontal ignore))
;; Set this-delta to t to signal that we found a sibling
;; of WINDOW whose size is not fixed.
(setq this-delta t)))
(setq sub (window-right sub)))
;; Set this-delta to what we can get from WINDOW's siblings.
(if (= (- delta) (window-size window horizontal t))
;; A deletion, presumably. We must handle this case
;; specially since `window--resizable' can't be used.
(if this-delta
;; There's at least one resizable sibling we can
;; give WINDOW's size to.
(setq this-delta delta)
;; No resizable sibling exists.
(setq this-delta 0))
;; Any other form of resizing.
(setq this-delta
(window--resizable
window delta horizontal ignore trail t nil t)))
;; Set other-delta to what we still have to get from
;; ancestor windows of parent.
(setq other-delta (- delta this-delta))
(unless (zerop other-delta)
;; Unless we got everything from WINDOW's siblings, PARENT
;; must be resized by other-delta lines or columns.
(set-window-new-pixel parent other-delta 'add))
(if (zerop this-delta)
;; We haven't got anything from WINDOW's siblings but we
;; must update the normal sizes to respect other-delta.
(window--resize-child-windows-normal
parent horizontal window this-delta trail other-delta)
;; We did get something from WINDOW's siblings which means
;; we have to resize their child windows.
(unless (eq (window--resize-child-windows
parent (- this-delta) horizontal
window ignore trail edge char-size)
;; If `window--resize-child-windows' returns
;; 'normalized, this means it has set the
;; normal sizes already.
'normalized)
;; Set the normal sizes.
(window--resize-child-windows-normal
parent horizontal window this-delta trail other-delta))
;; Set DELTA to what we still have to get from ancestor
;; windows.
(setq delta other-delta)))
;; In an ortho-combination all siblings of WINDOW must be
;; resized by DELTA.
(set-window-new-pixel parent delta 'add)
(while sub
(unless (eq sub window)
(window--resize-this-window
sub delta horizontal ignore t))
(setq sub (window-right sub))))
(unless (zerop delta)
;; "Go up."
(window--resize-siblings
parent delta horizontal ignore trail edge char-size)))))
(defun window--resize-this-window (window delta &optional horizontal ignore add trail edge char-size)
"Resize WINDOW vertically by DELTA pixels.
Optional argument HORIZONTAL non-nil means resize WINDOW
horizontally by DELTA pixels.
The optional argument IGNORE has the same meaning as for
`window-resizable'. Optional argument ADD non-nil means add
DELTA to the new total size of WINDOW.
Optional arguments TRAIL and EDGE, when non-nil, refine the set
of windows that shall be resized. If TRAIL equals `before',
resize only windows on the left or above EDGE. If TRAIL equals
`after', resize only windows on the right or below EDGE. Also,
preferably only resize windows adjacent to EDGE.
If the optional argument CHAR-SIZE is a positive integer, it specifies
the number of pixels by which windows are incrementally resized.
If CHAR-SIZE is nil, this means to use the value of
`frame-char-height' or `frame-char-width' of WINDOW's frame.
This function recursively resizes WINDOW's child windows to fit the
new size. Make sure that WINDOW is `window--resizable' before
calling this function. Note that this function does not resize
siblings of WINDOW or WINDOW's parent window. You have to
eventually call `window-resize-apply' in order to make resizing
actually take effect."
(when add
;; Add DELTA to the new total size of WINDOW.
(set-window-new-pixel window delta t))
(let ((sub (window-child window)))
(cond
((not sub))
((window-combined-p sub horizontal)
;; In an iso-combination resize child windows according to their
;; normal sizes.
(window--resize-child-windows
window delta horizontal nil ignore trail edge char-size))
;; In an ortho-combination resize each child window by DELTA.
(t
(while sub
(window--resize-this-window
sub delta horizontal ignore t trail edge char-size)
(setq sub (window-right sub)))))))
(defun window--resize-root-window (window delta horizontal ignore pixelwise)
"Resize root window WINDOW vertically by DELTA lines.
HORIZONTAL non-nil means resize root window WINDOW horizontally
by DELTA columns.
IGNORE non-nil means ignore any restrictions imposed by fixed
size windows, `window-min-height' or `window-min-width' settings.
This function is only called by the frame resizing routines. It
resizes windows proportionally and never deletes any windows."
(when (and (windowp window) (numberp delta))
(let ((pixel-delta
(if pixelwise
delta
(window--size-to-pixel window delta horizontal))))
(when (window-sizable-p window pixel-delta horizontal ignore t)
(window--resize-reset (window-frame window) horizontal)
(window--resize-this-window
window pixel-delta horizontal ignore t)))))
(defun window--resize-root-window-vertically (window delta pixelwise)
"Resize root window WINDOW vertically by DELTA lines.
If DELTA is less than zero and we can't shrink WINDOW by DELTA
lines, shrink it as much as possible. If DELTA is greater than
zero, this function can resize fixed-size windows in order to
recover the necessary lines. Return the number of lines that
were recovered.
Third argument PIXELWISE non-nil means to interpret DELTA as
pixels and return the number of pixels that were recovered.
This function is called by the minibuffer window resizing
routines."
(let* ((frame (window-frame window))
(pixel-delta
(cond
(pixelwise
delta)
((numberp delta)
(* (frame-char-height frame) delta))
(t 0)))
ignore)
(cond
((zerop pixel-delta))
((< pixel-delta 0)
(setq pixel-delta (window-sizable window pixel-delta nil nil pixelwise))
(window--resize-reset frame)
;; When shrinking the root window, emulate an edge drag in order
;; to not resize other windows if we can avoid it (Bug#12419).
(window--resize-this-window
window pixel-delta nil ignore t 'before
(+ (window-pixel-top window) (window-pixel-height window)))
;; Don't record new normal sizes to make sure that shrinking back
;; proportionally works as intended.
(walk-window-tree
(lambda (window) (set-window-new-normal window 'ignore)) frame t))
((> pixel-delta 0)
(window--resize-reset frame)
(unless (window-sizable window pixel-delta nil nil pixelwise)
(setq ignore t))
;; When growing the root window, resize proportionally. This
;; should give windows back their original sizes (hopefully).
(window--resize-this-window
window pixel-delta nil ignore t)))
;; Return the possibly adjusted DELTA.
(if pixelwise
pixel-delta
(/ pixel-delta (frame-char-height frame)))))
(defun window--resize-mini-frame (frame)
"Resize minibuffer-only frame FRAME."
(if (functionp resize-mini-frames)
(funcall resize-mini-frames frame)
(fit-mini-frame-to-buffer frame)))
(defun window--sanitize-window-sizes (horizontal)
"Assert that all windows on selected frame are large enough.
If necessary and possible, make sure that every window on frame
FRAME has its minimum height. Optional argument HORIZONTAL
non-nil means to make sure that every window on frame FRAME has
its minimum width. The minimum height/width of a window is the
respective value returned by `window-min-size' for that window.
Return t if all windows were resized appropriately. Return nil
if at least one window could not be resized as requested, which
may happen when the FRAME is not large enough to accommodate it."
(let ((value t))
(walk-window-tree
(lambda (window)
(let ((delta (- (window-min-size window horizontal nil t)
(window-size window horizontal t))))
(when (> delta 0)
(if (window-resizable-p window delta horizontal nil t)
(window-resize window delta horizontal nil t)
(setq value nil)))))
nil nil 'nomini)
value))
(defun adjust-window-trailing-edge (window delta &optional horizontal pixelwise)
"Move WINDOW's bottom edge by DELTA lines.
Optional argument HORIZONTAL non-nil means move WINDOW's right
edge by DELTA columns. WINDOW must be a valid window and
defaults to the selected one.
Optional argument PIXELWISE non-nil means interpret DELTA as
number of pixels.
If DELTA is greater than zero, move the edge downwards or to the
right. If DELTA is less than zero, move the edge upwards or to
the left. If the edge can't be moved by DELTA lines or columns,
move it as far as possible in the desired direction."
(setq window (window-normalize-window window))
(let* ((frame (window-frame window))
(minibuffer-window (minibuffer-window frame))
(right window)
left first-left first-right this-delta min-delta max-delta ignore)
(unless pixelwise
(setq pixelwise t)
(setq delta (* delta (frame-char-size window horizontal))))
;; Find the edge we want to move.
(while (and (or (not (window-combined-p right horizontal))
(not (window-right right)))
(setq right (window-parent right))))
(cond
((and (not right) (not horizontal)
;; Resize the minibuffer window if it's on the same frame as
;; and immediately below WINDOW and it's either active or
;; `resize-mini-windows' is nil.
(eq (window-frame minibuffer-window) frame)
(= (nth 1 (window-pixel-edges minibuffer-window))
(nth 3 (window-pixel-edges window)))
(or (not resize-mini-windows)
(eq minibuffer-window (active-minibuffer-window))))
(window--resize-mini-window minibuffer-window (- delta)))
((or (not (setq left right)) (not (setq right (window-right right))))
(if horizontal
(user-error "No window on the right of this one")
(user-error "No window below this one")))
(t
;; Set LEFT to the first resizable window on the left. This step is
;; needed to handle fixed-size windows.
(setq first-left left)
(while (and left
(or (window-size-fixed-p left horizontal)
(and (< delta 0)
(<= (window-size left horizontal t)
(window-min-size left horizontal nil t)))))
(setq left
(or (window-left left)
(progn
(while (and (setq left (window-parent left))
(not (window-combined-p left horizontal))))
(window-left left)))))
(unless left
;; We have to resize a size-preserved window. Start again with
;; the window initially on the left.
(setq ignore 'preserved)
(setq left first-left)
(while (and left
(or (window-size-fixed-p left horizontal 'preserved)
(and (< delta 0)
(<= (window-size left horizontal t)
(window-min-size
left horizontal 'preserved t)))))
(setq left
(or (window-left left)
(progn
(while (and (setq left (window-parent left))
(not (window-combined-p left horizontal))))
(window-left left)))))
(unless left
(if horizontal
(user-error "No resizable window on the left of this one")
(user-error "No resizable window above this one"))))
;; Set RIGHT to the first resizable window on the right. This step
;; is needed to handle fixed-size windows.
(setq first-right right)
(while (and right
(or (window-size-fixed-p right horizontal)
(and (> delta 0)
(<= (window-size right horizontal t)
(window-min-size
right horizontal 'preserved t)))))
(setq right
(or (window-right right)
(progn
(while (and (setq right (window-parent right))
(not (window-combined-p right horizontal))))
(window-right right)))))
(unless right
;; We have to resize a size-preserved window. Start again with
;; the window initially on the right.
(setq ignore 'preserved)
(setq right first-right)
(while (and right
(or (window-size-fixed-p right horizontal 'preserved)
(and (> delta 0)
(<= (window-size right horizontal t)
(window-min-size
right horizontal 'preserved t)))))
(setq right
(or (window-right right)
(progn
(while (and (setq right (window-parent right))
(not (window-combined-p right horizontal))))
(window-right right)))))
(unless right
(if horizontal
(user-error "No resizable window on the right of this one")
(user-error "No resizable window below this one"))))
;; LEFT and RIGHT (which might be both internal windows) are now the
;; two windows we want to resize.
(cond
((> delta 0)
(setq max-delta
(window--max-delta-1
left 0 horizontal ignore 'after nil pixelwise))
(setq min-delta
(window--min-delta-1
right (- delta) horizontal ignore 'before nil pixelwise))
(when (or (< max-delta delta) (> min-delta (- delta)))
;; We can't get the whole DELTA - move as far as possible.
(setq delta (min max-delta (- min-delta))))
(unless (zerop delta)
;; Start resizing.
(window--resize-reset frame horizontal)
;; Try to enlarge LEFT first.
(setq this-delta
(window--resizable
left delta horizontal ignore 'after nil nil pixelwise))
(unless (zerop this-delta)
(window--resize-this-window
left this-delta horizontal ignore t 'before
(if horizontal
(+ (window-pixel-left left) (window-pixel-width left))
(+ (window-pixel-top left) (window-pixel-height left)))))
;; Shrink windows on right of LEFT.
(window--resize-siblings
left delta horizontal ignore 'after
(if horizontal
(window-pixel-left right)
(window-pixel-top right)))))
((< delta 0)
(setq max-delta
(window--max-delta-1
right 0 horizontal ignore 'before nil pixelwise))
(setq min-delta
(window--min-delta-1
left delta horizontal ignore 'after nil pixelwise))
(when (or (< max-delta (- delta)) (> min-delta delta))
;; We can't get the whole DELTA - move as far as possible.
(setq delta (max (- max-delta) min-delta)))
(unless (zerop delta)
;; Start resizing.
(window--resize-reset frame horizontal)
;; Try to enlarge RIGHT.
(setq this-delta
(window--resizable
right (- delta) horizontal ignore 'before nil nil pixelwise))
(unless (zerop this-delta)
(window--resize-this-window
right this-delta horizontal ignore t 'after
(if horizontal
(window-pixel-left right)
(window-pixel-top right))))
;; Shrink windows on left of RIGHT.
(window--resize-siblings
right (- delta) horizontal ignore 'before
(if horizontal
(+ (window-pixel-left left) (window-pixel-width left))
(+ (window-pixel-top left) (window-pixel-height left)))))))
(unless (zerop delta)
;; Don't report an error in the standard case.
(when (window--resize-apply-p frame horizontal)
(if (window-resize-apply frame horizontal)
(window--pixel-to-total frame horizontal)
;; But do report an error if applying the changes fails.
(error "Failed adjusting window %s" window))))))))
(defun enlarge-window (delta &optional horizontal)
"Make the selected window DELTA lines taller.
Interactively, if no argument is given, make the selected window
one line taller. If optional argument HORIZONTAL is non-nil,
make selected window wider by DELTA columns. If DELTA is
negative, shrink selected window by -DELTA lines or columns."
(interactive "p")
(let ((minibuffer-window (minibuffer-window)))
(when (window-preserved-size nil horizontal)
(window-preserve-size nil horizontal))
(cond
((zerop delta))
((window-size-fixed-p nil horizontal)
(user-error "Selected window has fixed size"))
((window-minibuffer-p)
(if horizontal
(user-error "Cannot resize minibuffer window horizontally")
(window--resize-mini-window
(selected-window) (* delta (frame-char-height)))))
((and (not horizontal)
(window-full-height-p)
(eq (window-frame minibuffer-window) (selected-frame))
(not resize-mini-windows))
;; If the selected window is full height and `resize-mini-windows'
;; is nil, resize the minibuffer window.
(window--resize-mini-window
minibuffer-window (* (- delta) (frame-char-height))))
((window--resizable-p nil delta horizontal)
(window-resize nil delta horizontal))
((window--resizable-p nil delta horizontal 'preserved)
(window-resize nil delta horizontal 'preserved))
((eq this-command
(if horizontal 'enlarge-window-horizontally 'enlarge-window))
;; For backward compatibility don't signal an error unless this
;; command is `enlarge-window(-horizontally)'.
(user-error "Cannot enlarge selected window"))
(t
(window-resize
nil (if (> delta 0)
(window-max-delta nil horizontal)
(- (window-min-delta nil horizontal)))
horizontal)))))
(defun shrink-window (delta &optional horizontal)
"Make the selected window DELTA lines smaller.
Interactively, if no argument is given, make the selected window
one line smaller. If optional argument HORIZONTAL is non-nil,
make selected window narrower by DELTA columns. If DELTA is
negative, enlarge selected window by -DELTA lines or columns."
(interactive "p")
(let ((minibuffer-window (minibuffer-window)))
(when (window-preserved-size nil horizontal)
(window-preserve-size nil horizontal))
(cond
((zerop delta))
((window-size-fixed-p nil horizontal)
(user-error "Selected window has fixed size"))
((window-minibuffer-p)
(if horizontal
(user-error "Cannot resize minibuffer window horizontally")
(window--resize-mini-window
(selected-window) (* (- delta) (frame-char-height)))))
((and (not horizontal)
(window-full-height-p)
(eq (window-frame minibuffer-window) (selected-frame))
(not resize-mini-windows))
;; If the selected window is full height and `resize-mini-windows'
;; is nil, resize the minibuffer window.
(window--resize-mini-window
minibuffer-window (* delta (frame-char-height))))
((window--resizable-p nil (- delta) horizontal)
(window-resize nil (- delta) horizontal))
((window--resizable-p nil (- delta) horizontal 'preserved)
(window-resize nil (- delta) horizontal 'preserved))
((eq this-command
(if horizontal 'shrink-window-horizontally 'shrink-window))
;; For backward compatibility don't signal an error unless this
;; command is `shrink-window(-horizontally)'.
(user-error "Cannot shrink selected window"))
(t
(window-resize
nil (if (> delta 0)
(- (window-min-delta nil horizontal))
(window-max-delta nil horizontal))
horizontal)))))
(defun maximize-window (&optional window)
"Maximize WINDOW.
Make WINDOW as large as possible without deleting any windows.
WINDOW must be a valid window and defaults to the selected one.
If the option `window-resize-pixelwise' is non-nil maximize
WINDOW pixelwise."
(interactive)
(setq window (window-normalize-window window))
(window-resize
window (window-max-delta window nil nil nil nil nil window-resize-pixelwise)
nil nil window-resize-pixelwise)
(window-resize
window (window-max-delta window t nil nil nil nil window-resize-pixelwise)
t nil window-resize-pixelwise))
(defun minimize-window (&optional window)
"Minimize WINDOW.
Make WINDOW as small as possible without deleting any windows.
WINDOW must be a valid window and defaults to the selected one.
If the option `window-resize-pixelwise' is non-nil minimize
WINDOW pixelwise."
(interactive)
(setq window (window-normalize-window window))
(window-resize
window
(- (window-min-delta window nil nil nil nil nil window-resize-pixelwise))
nil nil window-resize-pixelwise)
(window-resize
window
(- (window-min-delta window t nil nil nil nil window-resize-pixelwise))
t nil window-resize-pixelwise))
\f
;;; Window edges
(defun window-edges (&optional window body absolute pixelwise)
"Return a list of the edge distances of WINDOW.
WINDOW must be a valid window and defaults to the selected one.
The list returned has the form (LEFT TOP RIGHT BOTTOM).
If the optional argument BODY is nil, this means to return the
edges corresponding to the total size of WINDOW. BODY non-nil
means to return the edges of WINDOW's body (aka text area). If
BODY is non-nil, WINDOW must specify a live window.
Optional argument ABSOLUTE nil means to return edges relative to
the position of WINDOW's native frame. ABSOLUTE non-nil means to
return coordinates relative to the origin - the position (0, 0) -
of FRAME's display. On non-graphical systems this argument has
no effect.
Optional argument PIXELWISE nil means to return the coordinates
in terms of the canonical character width and height of WINDOW's
frame, rounded if necessary. PIXELWISE non-nil means to return
the coordinates in pixels where the values for RIGHT and BOTTOM
are one more than the actual value of these edges. Note that if
ABSOLUTE is non-nil, PIXELWISE is implicitly non-nil too."
(let* ((window (window-normalize-window window body))
(frame (window-frame window))
(border-width (frame-internal-border-width frame))
(char-width (frame-char-width frame))
(char-height (frame-char-height frame))
(left (if pixelwise
(+ (window-pixel-left window) border-width)
(+ (window-left-column window)
(/ border-width char-width))))
(left-body
(when body
(+ (window-pixel-left window) border-width
(if (eq (car (window-current-scroll-bars window)) 'left)
(window-scroll-bar-width window)
0)
(nth 0 (window-fringes window))
(* (or (nth 0 (window-margins window)) 0) char-width))))
(top (if pixelwise
(+ (window-pixel-top window) border-width)
(+ (window-top-line window)
(/ border-width char-height))))
(top-body
(when body
(+ (window-pixel-top window) border-width
(window-header-line-height window))))
(right (+ left (if pixelwise
(window-pixel-width window)
(window-total-width window))))
(right-body (and body (+ left-body (window-body-width window t))))
(bottom (+ top (if pixelwise
(window-pixel-height window)
(window-total-height window))))
(bottom-body (and body (+ top-body (window-body-height window t)))))
(if absolute
(let* ((native-edges (frame-edges frame 'native-edges))
(left-off (nth 0 native-edges))
(top-off (nth 1 native-edges)))
(if body
(list (+ left-body left-off) (+ top-body top-off)
(+ right-body left-off) (+ bottom-body top-off))
(list (+ left left-off) (+ top top-off)
(+ right left-off) (+ bottom top-off))))
(if body
(if pixelwise
(list left-body top-body right-body bottom-body)
(list (/ left-body char-width) (/ top-body char-height)
;; Round up.
(/ (+ right-body char-width -1) char-width)
(/ (+ bottom-body char-height -1) char-height)))
(list left top right bottom)))))
(defun window-body-edges (&optional window)
"Return a list of the edge coordinates of WINDOW's body.
The return value is that of `window-edges' called with argument
BODY non-nil."
(window-edges window t))
(defalias 'window-inside-edges 'window-body-edges)
(defun window-pixel-edges (&optional window)
"Return a list of the edge pixel coordinates of WINDOW.
The return value is that of `window-edges' called with argument
PIXELWISE non-nil."
(window-edges window nil nil t))
(defun window-body-pixel-edges (&optional window)
"Return a list of the edge pixel coordinates of WINDOW's body.
The return value is that of `window-edges' called with arguments
BODY and PIXELWISE non-nil."
(window-edges window t nil t))
(defalias 'window-inside-pixel-edges 'window-body-pixel-edges)
(defun window-absolute-pixel-edges (&optional window)
"Return a list of the edge pixel coordinates of WINDOW.
The return value is that of `window-edges' called with argument
ABSOLUTE non-nil."
(window-edges window nil t t))
(defun window-absolute-body-pixel-edges (&optional window)
"Return a list of the edge pixel coordinates of WINDOW's text area.
The return value is that of `window-edges' called with arguments
BODY and ABSOLUTE non-nil."
(window-edges window t t t))
(defalias 'window-inside-absolute-pixel-edges 'window-absolute-body-pixel-edges)
(defun window-absolute-pixel-position (&optional position window)
"Return display coordinates of POSITION in WINDOW.
If the buffer position POSITION is visible in window WINDOW,
return the display coordinates of the upper/left corner of the
glyph at POSITION. The return value is a cons of the X- and
Y-coordinates of that corner, relative to an origin at (0, 0) of
WINDOW's display. Return nil if POSITION is not visible in
WINDOW.
WINDOW must be a live window and defaults to the selected window.
POSITION defaults to the value of `window-point' of WINDOW."
(let* ((window (window-normalize-window window t))
(pos-in-window
(pos-visible-in-window-p
(or position (window-point window)) window t)))
(when pos-in-window
(let ((edges (window-absolute-body-pixel-edges window)))
(cons (+ (nth 0 edges) (nth 0 pos-in-window))
(+ (nth 1 edges) (nth 1 pos-in-window)))))))
\f
(defun frame-root-window-p (window)
"Return t if WINDOW is the root window of its frame."
(eq window (frame-root-window window)))
(defun window--subtree (window &optional next)
"Return window subtree rooted at WINDOW.
Optional argument NEXT non-nil means include WINDOW's right
siblings in the return value.
See the documentation of `window-tree' for a description of the
return value."
(let (list)
(while window
(setq list
(cons
(cond
((window-top-child window)
(cons t (cons (window-edges window)
(window--subtree (window-top-child window) t))))
((window-left-child window)
(cons nil (cons (window-edges window)
(window--subtree (window-left-child window) t))))
(t window))
list))
(setq window (when next (window-next-sibling window))))
(nreverse list)))
(defun window-tree (&optional frame)
"Return the window tree of frame FRAME.
FRAME must be a live frame and defaults to the selected frame.
The return value is a list of the form (ROOT MINI), where ROOT
represents the window tree of the frame's root window, and MINI
is the frame's minibuffer window.
If the root window is not split, ROOT is the root window itself.
Otherwise, ROOT is a list (DIR EDGES W1 W2 ...) where DIR is nil
for a horizontal split, and t for a vertical split. EDGES gives
the combined size and position of the child windows in the split,
and the rest of the elements are the child windows in the split.
Each of the child windows may again be a window or a list
representing a window split, and so on. EDGES is a list (LEFT
TOP RIGHT BOTTOM) as returned by `window-edges'."
(setq frame (window-normalize-frame frame))
(window--subtree (frame-root-window frame) t))
\f
(defun other-window (count &optional all-frames interactive)
"Select another window in cyclic ordering of windows.
COUNT specifies the number of windows to skip, starting with the
selected window, before making the selection. If COUNT is
positive, skip COUNT windows forwards. If COUNT is negative,
skip -COUNT windows backwards. COUNT zero means do not skip any
window, so select the selected window. In an interactive call,
COUNT is the numeric prefix argument. Return nil.
If the `other-window' parameter of the selected window is a
function and `ignore-window-parameters' is nil, call that
function with the arguments COUNT and ALL-FRAMES.
This function does not select a window whose `no-other-window'
window parameter is non-nil.
This function uses `next-window' for finding the window to
select. The argument ALL-FRAMES has the same meaning as in
`next-window', but the MINIBUF argument of `next-window' is
always effectively nil."
(interactive "p\ni\np")
(let* ((window (selected-window))
(original-window window)
(function (and (not ignore-window-parameters)
(window-parameter window 'other-window)))
old-window old-count)
(if (functionp function)
(funcall function count all-frames)
;; `next-window' and `previous-window' may return a window we are
;; not allowed to select. Hence we need an exit strategy in case
;; all windows are non-selectable.
(catch 'exit
(while (> count 0)
(setq window (next-window window nil all-frames))
(cond
((eq window old-window)
(when (= count old-count)
;; Keep out of infinite loops. When COUNT has not changed
;; since we last looked at `window' we're probably in one.
(throw 'exit nil)))
((window-parameter window 'no-other-window)
(unless old-window
;; The first non-selectable window `next-window' got us:
;; Remember it and the current value of COUNT.
(setq old-window window)
(setq old-count count)))
(t
(setq count (1- count)))))
(while (< count 0)
(setq window (previous-window window nil all-frames))
(cond
((eq window old-window)
(when (= count old-count)
;; Keep out of infinite loops. When COUNT has not changed
;; since we last looked at `window' we're probably in one.
(throw 'exit nil)))
((window-parameter window 'no-other-window)
(unless old-window
;; The first non-selectable window `previous-window' got
;; us: Remember it and the current value of COUNT.
(setq old-window window)
(setq old-count count)))
(t
(setq count (1+ count)))))
(when (and (eq window original-window)
interactive
(not (or executing-kbd-macro noninteractive)))
(message "No other window to select"))
(select-window window)
;; Always return nil.
nil))))
(defun other-window-prefix ()
"Display the buffer of the next command in a new window.
The next buffer is the buffer displayed by the next command invoked
immediately after this command (ignoring reading from the minibuffer).
Creates a new window before displaying the buffer.
When `switch-to-buffer-obey-display-actions' is non-nil,
`switch-to-buffer' commands are also supported."
(interactive)
(display-buffer-override-next-command
(lambda (buffer alist)
(let ((alist (append '((inhibit-same-window . t)) alist))
window type)
(if (setq window (display-buffer-pop-up-window buffer alist))
(setq type 'window)
(setq window (display-buffer-use-some-window buffer alist)
type 'reuse))
(cons window type)))
nil "[other-window]")
(message "Display next command buffer in a new window..."))
(defun same-window-prefix ()
"Display the buffer of the next command in the same window.
The next buffer is the buffer displayed by the next command invoked
immediately after this command (ignoring reading from the minibuffer).
Even when the default rule should display the buffer in a new window,
force its display in the already selected window.
When `switch-to-buffer-obey-display-actions' is non-nil,
`switch-to-buffer' commands are also supported."
(interactive)
(display-buffer-override-next-command
(lambda (buffer alist)
(setq alist (append '((inhibit-same-window . nil)) alist))
(cons (or
(display-buffer-same-window buffer alist)
(display-buffer-use-some-window buffer alist))
'reuse))
nil "[same-window]")
(message "Display next command buffer in the same window..."))
;; This should probably return non-nil when the selected window is part
;; of an atomic window whose root is the frame's root window.
(defun one-window-p (&optional nomini all-frames)
"Return non-nil if the selected window is the only window.
Optional arg NOMINI non-nil means don't count the minibuffer
even if it is active. Otherwise, the minibuffer is counted
when it is active.
Optional argument ALL-FRAMES specifies the set of frames to
consider, see also `next-window'. ALL-FRAMES nil or omitted
means consider windows on the selected frame only, plus the
minibuffer window if specified by the NOMINI argument. If the
minibuffer counts, consider all windows on all frames that share
that minibuffer too. The remaining non-nil values of ALL-FRAMES
with a special meaning are:
- t means consider all windows on all existing frames.
- `visible' means consider all windows on all visible frames on
the current terminal.
- 0 (the number zero) means consider all windows on all visible
and iconified frames on the current terminal.
- A frame means consider all windows on that frame only.
Anything else means consider all windows on the selected frame
and no others."
(let ((base-window (selected-window)))
(if (and nomini (eq base-window (minibuffer-window)))
(setq base-window (next-window base-window)))
(eq base-window
(next-window base-window (if nomini 'arg) all-frames))))
\f
;;; Deleting windows.
(defun window-deletable-p (&optional window)
"Return t if WINDOW can be safely deleted from its frame.
WINDOW must be a valid window and defaults to the selected one.
Return `frame' if WINDOW is the root window of its frame and that
frame can be safely deleted."
(setq window (window-normalize-window window))
(unless (or ignore-window-parameters
(eq (window-parameter window 'delete-window) t))
;; Handle atomicity.
(when (window-parameter window 'window-atom)
(setq window (window-atom-root window))))
(let ((frame (window-frame window)))
(cond
((frame-root-window-p window)
;; WINDOW's frame can be deleted only if there are other frames
;; on the same terminal, and it does not contain the active
;; minibuffer.
(unless (or (eq frame (next-frame frame 0))
;; We can delete our frame only if no other frame
;; currently uses our minibuffer window.
(catch 'other
(dolist (other (frame-list))
(when (and (not (eq other frame))
(eq (window-frame (minibuffer-window other))
frame))
(throw 'other t))))
(let ((minibuf (active-minibuffer-window)))
(and minibuf (eq frame (window-frame minibuf))
(not (eq (default-toplevel-value
'minibuffer-follows-selected-frame)
t)))))
'frame))
((window-minibuffer-p window)
;; If WINDOW is the minibuffer window of a non-minibuffer-only
;; frame, it cannot be deleted separately.
nil)
((or ignore-window-parameters
(not (eq window (window-main-window frame))))
;; Otherwise, WINDOW can be deleted unless it is the main window
;; of its frame.
t))))
(defun window-at-x-y (x y &optional frame no-other)
"Return live window at coordinates X, Y on specified FRAME.
X and Y are FRAME-relative pixel coordinates. A coordinate on an
edge shared by two windows is attributed to the window on the
right (or below). Return nil if no such window can be found.
Optional argument FRAME must specify a live frame and defaults to
the selected one. Optional argument NO-OTHER non-nil means to
return nil if the window located at the specified coordinates has
a non-nil `no-other-window' parameter."
(setq frame (window-normalize-frame frame))
(let* ((root-edges (window-edges (frame-root-window frame) nil nil t))
(root-left (nth 2 root-edges))
(root-bottom (nth 3 root-edges)))
(catch 'window
(walk-window-tree
(lambda (window)
(let ((edges (window-edges window nil nil t)))
(when (and (>= x (nth 0 edges))
(or (< x (nth 2 edges)) (= x root-left))
(>= y (nth 1 edges))
(or (< y (nth 3 edges)) (= y root-bottom)))
(if (and no-other (window-parameter window 'no-other-window))
(throw 'window nil)
(throw 'window window)))))
frame))))
(defcustom delete-window-choose-selected 'mru
"How to choose a frame's selected window after window deletion.
When a frame's selected window gets deleted, Emacs has to choose
another live window on that frame to serve as its selected
window. This option allows to control which window gets selected
instead.
The possible choices are 'mru' (the default) to select the most
recently used window on that frame, and 'pos' to choose the
window at the frame coordinates of point of the previously
selected window. If this is nil, choose the frame's first window
instead. A window with a non-nil `no-other-window' parameter is
chosen only if all windows on that frame have that parameter set
to a non-nil value."
:type '(choice (const :tag "Most recently used" mru)
(const :tag "At position of deleted" pos)
(const :tag "Frame's first " nil))
:group 'windows
:group 'frames
:version "28.1")
(defun delete-window (&optional window)
"Delete specified WINDOW.
WINDOW must be a valid window and defaults to the selected one.
Return nil.
If the variable `ignore-window-parameters' is non-nil or the
`delete-window' parameter of WINDOW equals t, do not process any
parameters of WINDOW. Otherwise, if the `delete-window'
parameter of WINDOW specifies a function, call that function with
WINDOW as its sole argument and return the value returned by that
function.
Otherwise, if WINDOW is part of an atomic window, call
`delete-window' with the root of the atomic window as its
argument. Signal an error if WINDOW is either the only window on
its frame, the last non-side window, or part of an atomic window
that is its frame's root window.
If WINDOW is the selected window on its frame, choose some other
window as that frame's selected window according to the value of
the option `delete-window-choose-selected'."
(interactive)
(setq window (window-normalize-window window))
(let* ((frame (window-frame window))
(function (window-parameter window 'delete-window))
(parent (window-parent window))
atom-root)
(window--check frame)
(catch 'done
;; Handle window parameters.
(cond
;; Ignore window parameters if `ignore-window-parameters' tells
;; us so or `delete-window' equals t.
((or ignore-window-parameters (eq function t)))
((functionp function)
;; The `delete-window' parameter specifies the function to call.
;; If that function is `ignore' nothing is done. It's up to the
;; function called here to avoid infinite recursion.
(throw 'done (funcall function window)))
((and (window-parameter window 'window-atom)
(setq atom-root (window-atom-root window))
(not (eq atom-root window)))
(if (eq atom-root (frame-root-window frame))
(error "Root of atomic window is root window of its frame")
(throw 'done (delete-window atom-root))))
((not parent)
(error "Attempt to delete minibuffer or sole ordinary window"))
((eq window (window-main-window frame))
(error "Attempt to delete main window of frame %s" frame)))
(let* ((horizontal (window-left-child parent))
(size (window-size window horizontal t))
(window-combination-resize
(or window-combination-resize
(window-parameter parent 'window-side)))
(frame-selected-window (frame-selected-window frame))
;; Emacs 23 preferably gives WINDOW's space to its left
;; sibling.
(sibling (or (window-left window) (window-right window)))
frame-selected-window-edges frame-selected-window-pos)
(window--resize-reset frame horizontal)
(cond
((and (not (eq window-combination-resize t))
sibling (window-sizable-p sibling size horizontal nil t))
;; Resize WINDOW's sibling.
(window--resize-this-window sibling size horizontal nil t)
(set-window-new-normal
sibling (+ (window-normal-size sibling horizontal)
(window-normal-size window horizontal))))
((window--resizable-p window (- size) horizontal nil nil nil t t)
;; Can do without resizing fixed-size windows.
(window--resize-siblings window (- size) horizontal))
(t
;; Can't do without resizing fixed-size windows.
(window--resize-siblings window (- size) horizontal t)))
(when (eq delete-window-choose-selected 'pos)
;; Remember edges and position of point of the selected window
;; of WINDOW'S frame.
(setq frame-selected-window-edges
(window-edges frame-selected-window nil nil t))
(setq frame-selected-window-pos
(nth 2 (posn-at-point nil frame-selected-window))))
;; Actually delete WINDOW.
(delete-window-internal window)
(window--pixel-to-total frame horizontal)
;; If we deleted the selected window of WINDOW's frame, choose
;; another one based on `delete-window-choose-selected'. Note
;; that both `window-at-x-y' and `get-mru-window' may fail to
;; produce a suitable window in which case we will fall back on
;; its frame's first window, chosen by `delete-window-internal'.
(cond
((window-live-p frame-selected-window))
((and frame-selected-window-pos
;; We have a recorded position of point of the previously
;; selected window. Try to find the window that is now
;; at that position.
(let ((new-frame-selected-window
(window-at-x-y
(+ (nth 0 frame-selected-window-edges)
(car frame-selected-window-pos))
(+ (nth 1 frame-selected-window-edges)
(cdr frame-selected-window-pos))
frame t)))
(and new-frame-selected-window
;; Select window at WINDOW's position at point.
(set-frame-selected-window
frame new-frame-selected-window)))))
((and (eq delete-window-choose-selected 'mru)
;; Try to use the most recently used window.
(let ((mru-window (get-mru-window frame nil nil t)))
(and mru-window
(set-frame-selected-window frame mru-window)))))
((and (window-parameter
(frame-selected-window frame) 'no-other-window)
;; If `delete-window-internal' selected a window with a
;; non-nil 'no-other-window' parameter as its frame's
;; selected window, try to choose another one.
(catch 'found
(walk-window-tree
(lambda (other)
(unless (window-parameter other 'no-other-window)
(set-frame-selected-window frame other)
(throw 'found t)))
frame))))
(t
;; Record the window chosen by `delete-window-internal'.
(set-frame-selected-window
frame (frame-selected-window frame))))
(window--check frame)
;; Always return nil.
nil))))
(defun delete-other-windows (&optional window interactive)
"Make WINDOW fill its frame.
WINDOW must be a valid window and defaults to the selected one.
Return nil.
If the variable `ignore-window-parameters' is non-nil or the
`delete-other-windows' parameter of WINDOW equals t, do not pay
attention to any other parameters of WINDOW. Otherwise, if the
`delete-other-windows' parameter of WINDOW specifies a function,
call that function with WINDOW as its sole argument and return
the value returned by that function.
Else, if WINDOW is part of an atomic window, call this function
with the root of the atomic window as its argument. Signal an
error if that root window is the root window of WINDOW's frame.
Also signal an error if WINDOW is a side window. Do not delete
any window whose `no-delete-other-windows' parameter is non-nil."
(interactive "i\np")
(setq window (window-normalize-window window))
(let* ((frame (window-frame window))
(function (window-parameter window 'delete-other-windows))
atom-root main)
(window--check frame)
(catch 'done
(cond
;; Ignore window parameters if `ignore-window-parameters' is t or
;; `delete-other-windows' is t.
((or ignore-window-parameters (eq function t)))
((functionp function)
;; The `delete-other-windows' parameter specifies the function
;; to call. If the function is `ignore' no windows are deleted.
;; It's up to the function called to avoid infinite recursion.
(throw 'done (funcall function window)))
((and (window-parameter window 'window-atom)
(setq atom-root (window-atom-root window))
(not (eq atom-root window)))
(if (eq atom-root (frame-root-window frame))
(error "Root of atomic window is root window of its frame")
(throw 'done (delete-other-windows atom-root))))
((window-parameter window 'window-side)
(error "Cannot make side window the only window"))
((and (window-minibuffer-p window)
(not (eq window (frame-root-window window))))
(error "Can't expand minibuffer to full frame")))
(cond
((or ignore-window-parameters
(not (window-with-parameter 'no-delete-other-windows nil frame)))
(setq main (frame-root-window frame)))
((catch 'tag
(walk-window-tree
(lambda (other)
(when (or (and (window-parameter other 'window-side)
(not (window-parameter
other 'no-delete-other-windows)))
(and (not (window-parameter other 'window-side))
(window-parameter
other 'no-delete-other-windows)))
(throw 'tag nil)))
nil nil 'nomini)
t)
(setq main (window-main-window frame)))
(t
;; Delete windows via `delete-window' because we found either a
;; deletable side window or a non-deletable non-side-window.
(dolist (other (window-list frame))
(when (and (window-live-p other)
(not (eq other window))
(not (window-parameter
other 'no-delete-other-windows))
;; When WINDOW and the other window are part of the
;; same atomic window, don't delete the other.
(or (not atom-root)
(not (eq (window-atom-root other) atom-root))))
(condition-case nil
(delete-window other)
(error nil))))
(throw 'done nil)))
;; If WINDOW is the main window of its frame do nothing.
(if (eq window main)
;; Give a message to the user if this has been called as a
;; command.
(when (and interactive
(not (or executing-kbd-macro noninteractive)))
(message "No other windows to delete"))
(delete-other-windows-internal window main)
(window--check frame))
;; Always return nil.
nil)))
(defun delete-other-windows-vertically (&optional window)
"Delete the windows in the same column with WINDOW, but not WINDOW itself.
This may be a useful alternative binding for \\[delete-other-windows]
if you often split windows horizontally."
(interactive)
(let* ((window (or window (selected-window)))
(edges (window-edges window))
(w window) delenda)
(while (not (eq (setq w (next-window w 1)) window))
(let ((e (window-edges w)))
(when (and (= (car e) (car edges))
(= (nth 2 e) (nth 2 edges)))
(push w delenda))))
(mapc 'delete-window delenda)))
;;; Windows and buffers.
;; `prev-buffers' and `next-buffers' are two reserved window slots used
;; for (1) determining which buffer to show in the window when its
;; buffer shall be buried or killed and (2) which buffer to show for
;; `switch-to-prev-buffer' and `switch-to-next-buffer'.
;; `prev-buffers' consists of <buffer, window-start, window-point>
;; triples. The entries on this list are ordered by the time their
;; buffer has been removed from the window, the most recently removed
;; buffer's entry being first. The window-start and window-point
;; components are `window-start' and `window-point' at the time the
;; buffer was removed from the window which implies that the entry must
;; be added when `set-window-buffer' removes the buffer from the window.
;; `next-buffers' is the list of buffers that have been replaced
;; recently by `switch-to-prev-buffer'. These buffers are the least
;; preferred candidates of `switch-to-prev-buffer' and the preferred
;; candidates of `switch-to-next-buffer' to switch to. This list is
;; reset to nil by any action changing the window's buffer with the
;; exception of `switch-to-prev-buffer' and `switch-to-next-buffer'.
;; `switch-to-prev-buffer' pushes the buffer it just replaced on it,
;; `switch-to-next-buffer' pops the last pushed buffer from it.
;; Both `prev-buffers' and `next-buffers' may reference killed buffers
;; if such a buffer was killed while the window was hidden within a
;; window configuration. Such killed buffers get removed whenever
;; `switch-to-prev-buffer' or `switch-to-next-buffer' encounter them.
;; The following function is called by `set-window-buffer' _before_ it
;; replaces the buffer of the argument window with the new buffer.
(defun push-window-buffer-onto-prev (&optional window)
"Push entry for WINDOW's buffer onto WINDOW's prev-buffers list.
WINDOW must be a live window and defaults to the selected one.
Any duplicate entries for the buffer in the list are removed."
(let* ((window (window-normalize-window window t))
(buffer (window-buffer window))
(w-list (window-prev-buffers window))
(entry (assq buffer w-list)))
(when entry
(setq w-list (assq-delete-all buffer w-list)))
(let ((start (window-start window))
(point (window-point window)))
(setq entry
(cons buffer
(with-current-buffer buffer
(if entry
;; We have an entry, update marker positions.
(list (set-marker (nth 1 entry) start)
(set-marker (nth 2 entry) point))
(list (copy-marker start)
(copy-marker
;; Preserve window-point-insertion-type
;; (Bug#12855)
point window-point-insertion-type))))))
(set-window-prev-buffers window (cons entry w-list)))))
(defun record-window-buffer (&optional window)
"Record WINDOW's buffer.
WINDOW must be a live window and defaults to the selected one."
(let* ((window (window-normalize-window window t))
(buffer (window-buffer window)))
;; Reset WINDOW's next buffers. If needed, they are resurrected by
;; `switch-to-prev-buffer' and `switch-to-next-buffer'.
(set-window-next-buffers window nil)
;; Don't record insignificant buffers.
(when (not (eq (aref (buffer-name buffer) 0) ?\s))
(push-window-buffer-onto-prev window)
(run-hooks 'buffer-list-update-hook))))
(defun unrecord-window-buffer (&optional window buffer)
"Unrecord BUFFER in WINDOW.
WINDOW must be a live window and defaults to the selected one.
BUFFER must be a live buffer and defaults to the buffer of
WINDOW."
(let* ((window (window-normalize-window window t))
(buffer (or buffer (window-buffer window))))
(set-window-prev-buffers
window (assq-delete-all buffer (window-prev-buffers window)))
(set-window-next-buffers
window (delq buffer (window-next-buffers window)))))
(defun set-window-buffer-start-and-point (window buffer &optional start point)
"Set WINDOW's buffer to BUFFER.
WINDOW must be a live window and defaults to the selected one.
Optional argument START non-nil means set WINDOW's start position
to START. Optional argument POINT non-nil means set WINDOW's
point to POINT. If WINDOW is selected this also sets BUFFER's
`point' to POINT. If WINDOW is selected and the buffer it showed
before was current this also makes BUFFER the current buffer."
(setq window (window-normalize-window window t))
(let ((selected (eq window (selected-window)))
(current (eq (window-buffer window) (current-buffer)))
(dedicated-side (eq (window-dedicated-p window) 'side)))
(set-window-buffer window buffer)
(and dedicated-side (set-window-dedicated-p window 'side))
(when (and selected current)
(set-buffer buffer))
(when start
;; Don't force window-start here (even if POINT is nil).
(set-window-start window start t))
(when point
(set-window-point window point))))
(defcustom switch-to-visible-buffer t
"If non-nil, allow switching to an already visible buffer.
If this variable is non-nil, `switch-to-prev-buffer' and
`switch-to-next-buffer' may switch to an already visible buffer.
If this variable is nil, `switch-to-prev-buffer' and
`switch-to-next-buffer' always try to avoid switching to a buffer
that is already visible in another window on the same frame."
:type 'boolean
:version "24.1"
:group 'windows)
(make-obsolete-variable 'switch-to-visible-buffer
'switch-to-prev-buffer-skip "27.1")
(defcustom switch-to-prev-buffer-skip nil
"Buffers `switch-to-prev-buffer' should skip.
If this variable is nil, `switch-to-prev-buffer' may switch to
any buffer, including those already shown in other windows.
If this variable is non-nil, `switch-to-prev-buffer' will refrain
from switching to certain buffers according to the value of this
variable:
- `this' means do not switch to a buffer shown on the frame that
hosts the window `switch-to-prev-buffer' is acting upon.
- `visible' means do not switch to a buffer shown on any visible
frame.
- 0 (the number zero) means do not switch to a buffer shown on
any visible or iconified frame.
- t means do not switch to a buffer shown on any live frame.
If this option specifies a function, that function is called with
three arguments - the WINDOW argument of `switch-to-prev-buffer',
a buffer `switch-to-prev-buffer' intends to switch to and the
BURY-OR-KILL argument of `switch-to-prev-buffer'. If that
function returns non-nil, `switch-to-prev-buffer' will not switch
to that buffer.
Since `switch-to-prev-buffer' is called by `bury-buffer',
`replace-buffer-in-windows' and `quit-restore-window' among
others, customizing this option may also affect the behavior of
Emacs when a window is quit or a buffer gets buried or killed.
The value of this option is consulted by `switch-to-next-buffer'
as well. In that case, if this option specifies a function, it
will be called with the third argument nil.
Under certain circumstances `switch-to-prev-buffer' may ignore
this option, for example, when there is only one buffer left."
:type
'(choice (const :tag "Never" nil)
(const :tag "This frame" this)
(const :tag "Visible frames" visible)
(const :tag "Visible and iconified frames" 0)
(const :tag "Any frame" t)
(function :tag "Function"))
:version "27.1"
:group 'windows)
(defun switch-to-prev-buffer-skip-p (skip window buffer &optional bury-or-kill)
"Return non-nil if `switch-to-prev-buffer' should skip BUFFER.
SKIP is a value derived from `switch-to-prev-buffer-skip', WINDOW
the window `switch-to-prev-buffer' acts upon. Optional argument
BURY-OR-KILL is passed unchanged by `switch-to-prev-buffer' and
omitted in calls from `switch-to-next-buffer'."
(when skip
(if (functionp skip)
(funcall skip window buffer bury-or-kill)
(get-buffer-window buffer skip))))
(defun switch-to-prev-buffer (&optional window bury-or-kill)
"In WINDOW switch to previous buffer.
WINDOW must be a live window and defaults to the selected one.
Return the buffer switched to, nil if no suitable buffer could be
found.
Optional argument BURY-OR-KILL non-nil means the buffer currently
shown in WINDOW is about to be buried or killed and consequently
shall not be switched to in future invocations of this command.
As a special case, if BURY-OR-KILL equals `append', this means to
move the buffer to the end of WINDOW's previous buffers list so a
future invocation of `switch-to-prev-buffer' less likely switches
to it.
The option `switch-to-prev-buffer-skip' can be used to not switch
to certain buffers, for example, to those already shown in
another window. Also, if WINDOW's frame has a `buffer-predicate'
parameter, that predicate may inhibit switching to certain
buffers.
This function is called by `previous-buffer'."
(interactive)
(let* ((window (window-normalize-window window t))
(frame (window-frame window))
(window-side (window-parameter window 'window-side))
(old-buffer (window-buffer window))
;; Save this since it's destroyed by `set-window-buffer'.
(next-buffers (window-next-buffers window))
(pred (frame-parameter frame 'buffer-predicate))
(skip
(cond
((or (functionp switch-to-prev-buffer-skip)
(memq switch-to-prev-buffer-skip '(t visible 0)))
switch-to-prev-buffer-skip)
((or switch-to-prev-buffer-skip
(not switch-to-visible-buffer))
frame)))
entry new-buffer killed-buffers skipped)
(when (window-minibuffer-p window)
;; Don't switch in minibuffer window.
(unless (setq window (minibuffer-selected-window))
(error "Window %s is a minibuffer window" window)))
(unless (memq (window-dedicated-p window) '(nil side))
;; Don't switch in dedicated window.
(error "Window %s is dedicated to buffer %s" window old-buffer))
(catch 'found
;; Scan WINDOW's previous buffers first, skipping entries of next
;; buffers.
(dolist (entry (window-prev-buffers window))
(when (and (not (eq (car entry) old-buffer))
(setq new-buffer (car entry))
(or (buffer-live-p new-buffer)
(not (setq killed-buffers
(cons new-buffer killed-buffers))))
(or (null pred) (funcall pred new-buffer))
;; When BURY-OR-KILL is nil, avoid switching to a
;; buffer in WINDOW's next buffers list.
(or bury-or-kill (not (memq new-buffer next-buffers))))
(if (switch-to-prev-buffer-skip-p skip window new-buffer bury-or-kill)
(setq skipped new-buffer)
(set-window-buffer-start-and-point
window new-buffer (nth 1 entry) (nth 2 entry))
(throw 'found t))))
;; Scan reverted buffer list of WINDOW's frame next, skipping
;; entries of next buffers. Note that when we bury or kill a
;; buffer we don't reverse the global buffer list to avoid showing
;; a buried buffer instead. Otherwise, we must reverse the global
;; buffer list in order to make sure that switching to the
;; previous/next buffer traverse it in opposite directions. Skip
;; this step for side windows.
(unless window-side
(dolist (buffer (if bury-or-kill
(buffer-list frame)
(nreverse (buffer-list frame))))
(when (and (buffer-live-p buffer)
(not (eq buffer old-buffer))
(or (null pred) (funcall pred buffer))
;; Skip buffers whose names start with a space.
(not (eq (aref (buffer-name buffer) 0) ?\s))
;; Skip buffers shown in a side window before.
(not (buffer-local-value 'window--sides-shown buffer))
(or bury-or-kill (not (memq buffer next-buffers))))
(if (switch-to-prev-buffer-skip-p skip window buffer bury-or-kill)
(setq skipped (or skipped buffer))
(setq new-buffer buffer)
(set-window-buffer-start-and-point window new-buffer)
(throw 'found t)))))
(unless bury-or-kill
;; Scan reverted next buffers last (must not use nreverse
;; here!).
(dolist (buffer (reverse next-buffers))
;; Actually, buffer _must_ be live here since otherwise it
;; would have been caught in the scan of previous buffers.
(when (and (or (buffer-live-p buffer)
(not (setq killed-buffers
(cons buffer killed-buffers))))
(not (eq buffer old-buffer))
(or (null pred) (funcall pred buffer))
(setq entry (assq buffer (window-prev-buffers window))))
(if (switch-to-prev-buffer-skip-p skip window buffer bury-or-kill)
(setq skipped (or skipped buffer))
(setq new-buffer buffer)
(set-window-buffer-start-and-point
window new-buffer (nth 1 entry) (nth 2 entry))
(throw 'found t)))))
(when (and skipped (not (functionp switch-to-prev-buffer-skip)))
;; Show first skipped buffer, unless skip was a function.
(setq new-buffer skipped)
(set-window-buffer-start-and-point window new-buffer)))
(if bury-or-kill
(let ((entry (and (eq bury-or-kill 'append)
(assq old-buffer (window-prev-buffers window)))))
;; Remove `old-buffer' from WINDOW's previous and (restored list
;; of) next buffers.
(set-window-prev-buffers
window (assq-delete-all old-buffer (window-prev-buffers window)))
(set-window-next-buffers window (delq old-buffer next-buffers))
(when entry
;; Append old-buffer's entry to list of WINDOW's previous
;; buffers so it's less likely to get switched to soon but
;; `display-buffer-in-previous-window' can nevertheless find
;; it.
(set-window-prev-buffers
window (append (window-prev-buffers window) (list entry)))))
;; Move `old-buffer' to head of WINDOW's restored list of next
;; buffers.
(set-window-next-buffers
window (cons old-buffer (delq old-buffer next-buffers))))
;; Remove killed buffers from WINDOW's previous and next buffers.
(when killed-buffers
(dolist (buffer killed-buffers)
(set-window-prev-buffers
window (assq-delete-all buffer (window-prev-buffers window)))
(set-window-next-buffers
window (delq buffer (window-next-buffers window)))))
;; Return new-buffer.
new-buffer))
(defun switch-to-next-buffer (&optional window)
"In WINDOW switch to next buffer.
WINDOW must be a live window and defaults to the selected one.
Return the buffer switched to, nil if no suitable buffer could be
found.
The option `switch-to-prev-buffer-skip' can be used to not switch
to certain buffers, for example, to those already shown in
another window. Also, if WINDOW's frame has a `buffer-predicate'
parameter, that predicate may inhibit switching to certain
buffers.
This function is called by `next-buffer'."
(interactive)
(let* ((window (window-normalize-window window t))
(frame (window-frame window))
(window-side (window-parameter window 'window-side))
(old-buffer (window-buffer window))
(next-buffers (window-next-buffers window))
(pred (frame-parameter frame 'buffer-predicate))
(skip
(cond
((or (functionp switch-to-prev-buffer-skip)
(memq switch-to-prev-buffer-skip '(t visible 0)))
switch-to-prev-buffer-skip)
((or switch-to-prev-buffer-skip
(not switch-to-visible-buffer))
frame)))
new-buffer entry killed-buffers skipped)
(when (window-minibuffer-p window)
;; Don't switch in minibuffer window.
(unless (setq window (minibuffer-selected-window))
(error "Window %s is a minibuffer window" window)))
(unless (memq (window-dedicated-p window) '(nil side))
;; Don't switch in dedicated window.
(error "Window %s is dedicated to buffer %s" window old-buffer))
(catch 'found
;; Scan WINDOW's next buffers first.
(dolist (buffer next-buffers)
(when (and (or (buffer-live-p buffer)
(not (setq killed-buffers
(cons buffer killed-buffers))))
(not (eq buffer old-buffer))
(or (null pred) (funcall pred buffer))
(setq entry (assq buffer (window-prev-buffers window))))
(if (switch-to-prev-buffer-skip-p skip window buffer)
(setq skipped buffer)
(setq new-buffer buffer)
(set-window-buffer-start-and-point
window new-buffer (nth 1 entry) (nth 2 entry))
(throw 'found t))))
;; Scan the buffer list of WINDOW's frame next, skipping previous
;; buffers entries. Skip this step for side windows.
(unless window-side
(dolist (buffer (buffer-list frame))
(when (and (buffer-live-p buffer)
(not (eq buffer old-buffer))
(or (null pred) (funcall pred buffer))
;; Skip buffers whose names start with a space.
(not (eq (aref (buffer-name buffer) 0) ?\s))
;; Skip buffers shown in a side window before.
(not (buffer-local-value 'window--sides-shown buffer))
(not (assq buffer (window-prev-buffers window))))
(if (switch-to-prev-buffer-skip-p skip window buffer)
(setq skipped (or skipped buffer))
(setq new-buffer buffer)
(set-window-buffer-start-and-point window new-buffer)
(throw 'found t)))))
;; Scan WINDOW's reverted previous buffers last (must not use
;; nreverse here!)
(dolist (entry (reverse (window-prev-buffers window)))
(when (and (not (eq new-buffer (car entry)))
(not (eq old-buffer (car entry)))
(setq new-buffer (car entry))
(or (buffer-live-p new-buffer)
(not (setq killed-buffers
(cons new-buffer killed-buffers))))
(or (null pred) (funcall pred new-buffer)))
(if (switch-to-prev-buffer-skip-p skip window new-buffer)
(setq skipped (or skipped new-buffer))
(set-window-buffer-start-and-point
window new-buffer (nth 1 entry) (nth 2 entry))
(throw 'found t))))
(when (and skipped (not (functionp switch-to-prev-buffer-skip)))
;; Show first skipped buffer, unless skip was a function.
(setq new-buffer skipped)
(set-window-buffer-start-and-point window new-buffer)))
;; Remove `new-buffer' from and restore WINDOW's next buffers.
(set-window-next-buffers window (delq new-buffer next-buffers))
;; Remove killed buffers from WINDOW's previous and next buffers.
(when killed-buffers
(dolist (buffer killed-buffers)
(set-window-prev-buffers
window (assq-delete-all buffer (window-prev-buffers window)))
(set-window-next-buffers
window (delq buffer (window-next-buffers window)))))
;; Return new-buffer.
new-buffer))
(defun get-next-valid-buffer (list &optional buffer visible-ok frame)
"Search LIST for a valid buffer to display in FRAME.
Return nil when all buffers in LIST are undesirable for display,
otherwise return the first suitable buffer in LIST.
Buffers not visible in windows are preferred to visible buffers,
unless VISIBLE-OK is non-nil.
If the optional argument FRAME is nil, it defaults to the selected frame.
If BUFFER is non-nil, ignore occurrences of that buffer in LIST."
;; This logic is more or less copied from other-buffer.
(setq frame (or frame (selected-frame)))
(let ((pred (frame-parameter frame 'buffer-predicate))
found buf)
(while (and (not found) list)
(setq buf (car list))
(if (and (not (eq buffer buf))
(buffer-live-p buf)
(or (null pred) (funcall pred buf))
(not (eq (aref (buffer-name buf) 0) ?\s))
(or visible-ok (null (get-buffer-window buf 'visible))))
(setq found buf)
(setq list (cdr list))))
(car list)))
(defun last-buffer (&optional buffer visible-ok frame)
"Return the last buffer in FRAME's buffer list.
If BUFFER is the last buffer, return the preceding buffer
instead. Buffers not visible in windows are preferred to visible
buffers, unless optional argument VISIBLE-OK is non-nil.
Optional third argument FRAME nil or omitted means use the
selected frame's buffer list. If no such buffer exists, return
the buffer `*scratch*', creating it if necessary."
(setq frame (or frame (selected-frame)))
(or (get-next-valid-buffer (nreverse (buffer-list frame))
buffer visible-ok frame)
(get-buffer "*scratch*")
(let ((scratch (get-buffer-create "*scratch*")))
(set-buffer-major-mode scratch)
scratch)))
(defcustom frame-auto-hide-function #'iconify-frame
"Function called to automatically hide frames.
The function is called with one argument - a frame.
Functions affected by this option are those that bury a buffer
shown in a separate frame like `quit-window' and `bury-buffer'."
:type '(choice (const :tag "Iconify" iconify-frame)
(const :tag "Make invisible" make-frame-invisible)
(const :tag "Delete" delete-frame)
(const :tag "Do nothing" ignore)
function)
:group 'windows
:group 'frames
:version "26.1")
(defun window--delete (&optional window dedicated-only kill)
"Delete WINDOW if possible.
WINDOW must be a live window and defaults to the selected one.
Optional argument DEDICATED-ONLY non-nil means to delete WINDOW
only if it's dedicated to its buffer. Optional argument KILL
means the buffer shown in window will be killed. Return non-nil
if WINDOW gets deleted or its frame is auto-hidden."
(setq window (window-normalize-window window t))
(unless (and dedicated-only (not (window-dedicated-p window)))
(let ((deletable (window-deletable-p window)))
(cond
((eq deletable 'frame)
(let ((frame (window-frame window)))
(cond
(kill
(delete-frame frame))
((functionp (frame-parameter frame 'auto-hide-function))
(funcall (frame-parameter frame 'auto-hide-function)))
((functionp frame-auto-hide-function)
(funcall frame-auto-hide-function frame))))
'frame)
(deletable
(delete-window window)
t)))))
(defun bury-buffer (&optional buffer-or-name)
"Put BUFFER-OR-NAME at the end of the list of all buffers.
There it is the least likely candidate for `other-buffer' to
return; thus, the least likely buffer for \\[switch-to-buffer] to
select by default.
You can specify a buffer name as BUFFER-OR-NAME, or an actual
buffer object. If BUFFER-OR-NAME is nil or omitted, bury the
current buffer. Also, if BUFFER-OR-NAME is nil or omitted,
remove the current buffer from the selected window if it is
displayed there."
(interactive)
(let* ((buffer (window-normalize-buffer buffer-or-name)))
;; If `buffer-or-name' is not on the selected frame we unrecord it
;; although it's not "here" (call it a feature).
(bury-buffer-internal buffer)
;; Handle case where `buffer-or-name' is nil and the current buffer
;; is shown in the selected window.
(cond
((or buffer-or-name
(not (eq buffer (window-buffer)))
;; Don't try to delete the minibuffer window, undedicate it
;; or switch to a previous buffer in it.
(window-minibuffer-p)))
((window--delete nil t))
(t
;; Switch to another buffer in window.
(set-window-dedicated-p nil nil)
(switch-to-prev-buffer nil 'bury)))
;; Always return nil.
nil))
(defun unbury-buffer ()
"Switch to the last buffer in the buffer list."
(interactive)
(switch-to-buffer (last-buffer)))
(defun next-buffer (&optional arg interactive)
"In selected window switch to ARGth next buffer.
Call `switch-to-next-buffer' unless the selected window is the
minibuffer window or is dedicated to its buffer."
(interactive "p\np")
(cond
((window-minibuffer-p)
(user-error "Cannot switch buffers in minibuffer window"))
((eq (window-dedicated-p) t)
(user-error "Window is strongly dedicated to its buffer"))
(t
(dotimes (_ (or arg 1))
(when (and (not (switch-to-next-buffer))
interactive
(not (or executing-kbd-macro noninteractive)))
(user-error "No next buffer"))))))
(defun previous-buffer (&optional arg interactive)
"In selected window switch to ARGth previous buffer.
Call `switch-to-prev-buffer' unless the selected window is the
minibuffer window or is dedicated to its buffer."
(interactive "p\np")
(cond
((window-minibuffer-p)
(user-error "Cannot switch buffers in minibuffer window"))
((eq (window-dedicated-p) t)
(user-error "Window is strongly dedicated to its buffer"))
(t
(dotimes (_ (or arg 1))
(when (and (not (switch-to-prev-buffer))
interactive
(not (or executing-kbd-macro noninteractive)))
(user-error "No previous buffer"))))))
(defun delete-windows-on (&optional buffer-or-name frame)
"Delete all windows showing BUFFER-OR-NAME.
BUFFER-OR-NAME may be a buffer or the name of an existing buffer
and defaults to the current buffer.
Interactively, prompt for the buffer.
The following non-nil values of the optional argument FRAME
have special meanings:
- t means consider all windows on the selected frame only.
- `visible' means consider all windows on all visible frames on
the current terminal.
- 0 (the number zero) means consider all windows on all visible
and iconified frames on the current terminal.
- A frame means consider all windows on that frame only.
Any other value of FRAME means consider all windows on all
frames.
Interactively, FRAME is the prefix argument, so you can
use \\[universal-argument] 0 to specify all windows only on
the current terminal's frames.
If a frame's root window shows the buffer specified by
BUFFER-OR-NAME and is dedicated to that buffer and that frame
does not host the active minibuffer window and there is at least
one other frame on that frame's terminal, delete that frame.
Otherwise, do not delete a frame's root window if it shows the
buffer specified by BUFFER-OR-NAME and do not delete any frame's
main window showing that buffer either. Rather, in any such
case, call `switch-to-prev-buffer' to show another buffer in that
window and make sure the window is no more dedicated to its
buffer.
If the buffer specified by BUFFER-OR-NAME is shown in a
minibuffer window, do nothing for that window. For any window
that does not show that buffer, remove the buffer from that
window's lists of previous and next buffers."
(interactive "bDelete windows on (buffer):\nP")
(let ((buffer (window-normalize-buffer buffer-or-name))
;; Handle the "inverted" meaning of the FRAME argument wrt other
;; `window-list-1' based function.
(all-frames (cond ((not frame) t) ((eq frame t) nil) (t frame))))
(dolist (window (window-list-1 nil nil all-frames))
(if (eq (window-buffer window) buffer)
(let ((deletable (window-deletable-p window))
(dedicated (window-dedicated-p window)))
(cond
((and (eq deletable 'frame) dedicated)
;; Delete frame if and only if window is dedicated.
(delete-frame (window-frame window)))
((eq deletable t)
;; Delete window.
(delete-window window))
(t
;; In window switch to previous buffer.
(set-window-dedicated-p window nil)
(switch-to-prev-buffer window 'bury)
;; Restore the dedicated 'side' flag.
(when (eq dedicated 'side)
(set-window-dedicated-p window 'side)))))
;; If a window doesn't show BUFFER, unrecord BUFFER in it.
(unrecord-window-buffer window buffer)))))
(defun replace-buffer-in-windows (&optional buffer-or-name)
"Replace BUFFER-OR-NAME with some other buffer in all windows showing it.
BUFFER-OR-NAME may be a buffer or the name of an existing buffer
and defaults to the current buffer.
With the exception of side windows, when a window showing BUFFER-OR-NAME
is dedicated, that window is deleted. If that window is the only window
on its frame, the frame is deleted too when there are other frames left.
If there are no other frames left, some other buffer is displayed in that
window.
This function removes the buffer denoted by BUFFER-OR-NAME from
all window-local buffer lists."
(interactive "bBuffer to replace: ")
(let ((buffer (window-normalize-buffer buffer-or-name)))
(dolist (window (window-list-1 nil nil t))
(if (eq (window-buffer window) buffer)
;; Delete a dedicated window unless it is a side window.
(let ((dedicated-side (eq (window-dedicated-p window) 'side)))
(when (or dedicated-side (not (window--delete window t t)))
;; Switch to another buffer in that window.
(set-window-dedicated-p window nil)
(if (switch-to-prev-buffer window 'kill)
(and dedicated-side (set-window-dedicated-p window 'side))
(window--delete window nil 'kill))))
;; Unrecord BUFFER in WINDOW.
(unrecord-window-buffer window buffer)))))
(defcustom quit-window-hook nil
"Hook run before performing any other actions in the `quit-window' command."
:type 'hook
:version "27.1"
:group 'windows)
(defun quit-restore-window (&optional window bury-or-kill)
"Quit WINDOW and deal with its buffer.
WINDOW must be a live window and defaults to the selected one.
According to information stored in WINDOW's `quit-restore' window
parameter either (1) delete WINDOW and its frame, (2) delete
WINDOW but leave its frame alone, (3) restore the buffer
previously shown in WINDOW, or (4) make WINDOW display some other
buffer. If WINDOW is not deleted, reset its `quit-restore'
parameter to nil. See Info node `(elisp) Quitting Windows' for
more details.
If WINDOW's dedicated flag is t, try to delete WINDOW. If it
equals the value 'side', restore that value when WINDOW is not
deleted.
Optional second argument BURY-OR-KILL tells how to proceed with
the buffer of WINDOW. The following values are handled:
nil means to not handle the buffer in a particular way. This
means that if WINDOW is not deleted by this function, invoking
`switch-to-prev-buffer' will usually show the buffer again.
`append' means that if WINDOW is not deleted, move its buffer to
the end of WINDOW's previous buffers so it's less likely that a
future invocation of `switch-to-prev-buffer' will switch to it.
Also, move the buffer to the end of the frame's buffer list.
`bury' means that if WINDOW is not deleted, remove its buffer
from WINDOW'S list of previous buffers. Also, move the buffer
to the end of the frame's buffer list. This value provides the
most reliable remedy to not have `switch-to-prev-buffer' switch
to this buffer again without killing the buffer.
`kill' means to kill WINDOW's buffer."
(setq window (window-normalize-window window t))
(let* ((buffer (window-buffer window))
(quit-restore (window-parameter window 'quit-restore))
(prev-buffer (catch 'prev-buffer
(dolist (buf (window-prev-buffers window))
(unless (eq (car buf) buffer)
(throw 'prev-buffer (car buf))))))
(dedicated (window-dedicated-p window))
quad entry)
(cond
;; First try to delete dedicated windows that are not side windows.
((and dedicated (not (eq dedicated 'side))
(window--delete window 'dedicated (eq bury-or-kill 'kill))))
((and (not prev-buffer)
(eq (nth 1 quit-restore) 'tab)
(eq (nth 3 quit-restore) buffer))
(tab-bar-close-tab)
;; If the previously selected window is still alive, select it.
(when (window-live-p (nth 2 quit-restore))
(select-window (nth 2 quit-restore))))
((and (not prev-buffer)
(or (eq (nth 1 quit-restore) 'frame)
(and (eq (nth 1 quit-restore) 'window)
;; If the window has been created on an existing
;; frame and ended up as the sole window on that
;; frame, do not delete it (Bug#12764).
(not (eq window (frame-root-window window)))))
(eq (nth 3 quit-restore) buffer)
;; Delete WINDOW if possible.
(window--delete window nil (eq bury-or-kill 'kill)))
;; If the previously selected window is still alive, select it.
(when (window-live-p (nth 2 quit-restore))
(select-window (nth 2 quit-restore))))
((and (listp (setq quad (nth 1 quit-restore)))
(buffer-live-p (car quad))
(eq (nth 3 quit-restore) buffer))
;; Show another buffer stored in quit-restore parameter.
(when (and (integerp (nth 3 quad))
(if (window-combined-p window)
(/= (nth 3 quad) (window-total-height window))
(/= (nth 3 quad) (window-total-width window))))
;; Try to resize WINDOW to its old height but don't signal an
;; error.
(condition-case nil
(window-resize
window
(- (nth 3 quad) (if (window-combined-p window)
(window-total-height window)
(window-total-width window)))
(window-combined-p window t))
(error nil)))
(set-window-dedicated-p window nil)
;; Restore WINDOW's previous buffer, start and point position.
(set-window-buffer-start-and-point
window (nth 0 quad) (nth 1 quad) (nth 2 quad))
;; Restore the 'side' dedicated flag as well.
(when (eq dedicated 'side)
(set-window-dedicated-p window 'side))
;; Deal with the buffer we just removed from WINDOW.
(setq entry (and (eq bury-or-kill 'append)
(assq buffer (window-prev-buffers window))))
(when bury-or-kill
;; Remove buffer from WINDOW's previous and next buffers.
(set-window-prev-buffers
window (assq-delete-all buffer (window-prev-buffers window)))
(set-window-next-buffers
window (delq buffer (window-next-buffers window))))
(when entry
;; Append old buffer's entry to list of WINDOW's previous
;; buffers so it's less likely to get switched to soon but
;; `display-buffer-in-previous-window' can nevertheless find it.
(set-window-prev-buffers
window (append (window-prev-buffers window) (list entry))))
;; Reset the quit-restore parameter.
(set-window-parameter window 'quit-restore nil)
;; Select old window.
(when (window-live-p (nth 2 quit-restore))
(select-window (nth 2 quit-restore))))
(t
;; Show some other buffer in WINDOW and reset the quit-restore
;; parameter.
(set-window-parameter window 'quit-restore nil)
;; Make sure that WINDOW is no more dedicated.
(set-window-dedicated-p window nil)
;; Try to switch to a previous buffer. Delete the window only if
;; that is not possible (Bug#48367).
(if (switch-to-prev-buffer window bury-or-kill)
(when (eq dedicated 'side)
(set-window-dedicated-p window 'side))
(window--delete window nil (eq bury-or-kill 'kill))
(when (window-live-p (nth 2 quit-restore))
(select-window (nth 2 quit-restore))))))
;; Deal with the buffer.
(cond
((not (buffer-live-p buffer)))
((eq bury-or-kill 'kill)
(kill-buffer buffer))
(bury-or-kill
(bury-buffer-internal buffer)))))
(defun quit-window (&optional kill window)
"Quit WINDOW and bury its buffer.
WINDOW must be a live window and defaults to the selected one.
With prefix argument KILL non-nil, kill the buffer instead of
burying it.
This calls the function `quit-restore-window' to delete WINDOW or
show some other buffer in it. See Info node `(elisp) Quitting
Windows' for more details.
The functions in `quit-window-hook' will be run before doing
anything else."
(interactive "P")
;; Run the hook from the buffer implied to get any buffer-local
;; values.
(with-current-buffer (window-buffer (window-normalize-window window))
(run-hooks 'quit-window-hook))
(quit-restore-window window (if kill 'kill 'bury)))
(defun quit-windows-on (&optional buffer-or-name kill frame)
"Quit all windows showing BUFFER-OR-NAME.
BUFFER-OR-NAME may be a buffer or the name of an existing buffer
and defaults to the current buffer. Optional argument KILL
non-nil means to kill BUFFER-OR-NAME. KILL nil means to bury
BUFFER-OR-NAME. Optional argument FRAME is handled as by
`delete-windows-on'.
This function calls `quit-window' on all candidate windows
showing BUFFER-OR-NAME."
(interactive "bQuit windows on (buffer):\nP")
(let ((buffer (window-normalize-buffer buffer-or-name))
;; Handle the "inverted" meaning of the FRAME argument wrt other
;; `window-list-1' based function.
(all-frames (cond ((not frame) t) ((eq frame t) nil) (t frame))))
(dolist (window (window-list-1 nil nil all-frames))
(if (eq (window-buffer window) buffer)
(quit-window kill window)
;; If a window doesn't show BUFFER, unrecord BUFFER in it.
(unrecord-window-buffer window buffer)))))
\f
(defun window--combination-resizable (parent &optional horizontal)
"Return number of pixels recoverable from height of window PARENT.
PARENT must be a vertical (horizontal if HORIZONTAL is non-nil)
window combination. The return value is the sum of the pixel
heights of all non-fixed height child windows of PARENT divided
by their number plus 1. If HORIZONTAL is non-nil, return the sum
of the pixel widths of all non-fixed width child windows of
PARENT divided by their number plus 1."
(let ((sibling (window-child parent))
(number 0)
(size 0))
(while sibling
(unless (window-size-fixed-p sibling horizontal)
(setq number (1+ number))
(setq size (+ (window-size sibling horizontal t) size)))
(setq sibling (window-next-sibling sibling)))
(/ size (1+ number))))
(defun split-window (&optional window size side pixelwise)
"Make a new window adjacent to WINDOW.
WINDOW must be a valid window and defaults to the selected one.
Return the new window which is always a live window.
Optional argument SIZE a positive number means make WINDOW SIZE
lines or columns tall. If SIZE is negative, make the new window
-SIZE lines or columns tall. If and only if SIZE is non-nil, its
absolute value can be less than `window-min-height' or
`window-min-width'; so this command can make a new window as
small as one line or two columns. SIZE defaults to half of
WINDOW's size.
Optional third argument SIDE nil (or `below') specifies that the
new window shall be located below WINDOW. SIDE `above' means the
new window shall be located above WINDOW. In both cases SIZE
specifies the new number of lines for WINDOW (or the new window
if SIZE is negative) including space reserved for the mode and/or
header line.
SIDE t (or `right') specifies that the new window shall be
located on the right side of WINDOW. SIDE `left' means the new
window shall be located on the left of WINDOW. In both cases
SIZE specifies the new number of columns for WINDOW (or the new
window provided SIZE is negative) including space reserved for
fringes and the scrollbar or a divider column.
For compatibility reasons, SIDE `up' and `down' are interpreted
as `above' and `below'. Any other non-nil value for SIDE is
currently handled like t (or `right').
PIXELWISE, if non-nil, means to interpret SIZE pixelwise.
If the variable `ignore-window-parameters' is non-nil or the
`split-window' parameter of WINDOW equals t, do not process any
parameters of WINDOW. Otherwise, if the `split-window' parameter
of WINDOW specifies a function, call that function with all three
arguments and return the value returned by that function.
Otherwise, if WINDOW is part of an atomic window, \"split\" the
root of that atomic window. The new window does not become a
member of that atomic window.
If WINDOW is live, properties of the new window like margins and
scrollbars are inherited from WINDOW. If WINDOW is an internal
window, these properties as well as the buffer displayed in the
new window are inherited from the window selected on WINDOW's
frame. The selected window is not changed by this function."
(setq window (window-normalize-window window))
(let* ((side (cond
((not side) 'below)
((eq side 'up) 'above)
((eq side 'down) 'below)
((memq side '(below above right left)) side)
(t 'right)))
(horizontal (not (memq side '(below above))))
(frame (window-frame window))
(parent (window-parent window))
(function (window-parameter window 'split-window))
(window-side (window-parameter window 'window-side))
;; Rebind the following two variables since in some cases we
;; have to override their value.
(window-combination-limit window-combination-limit)
(window-combination-resize window-combination-resize)
(char-size (frame-char-size window horizontal))
(pixel-size
(when (numberp size)
(window--size-to-pixel window size horizontal pixelwise t)))
(divider-width (if horizontal
(frame-right-divider-width frame)
(frame-bottom-divider-width frame)))
atom-root ignore)
(window--check frame)
(catch 'done
(cond
;; Ignore window parameters if either `ignore-window-parameters'
;; is t or the 'split-window' parameter equals t.
((or ignore-window-parameters (eq function t)))
((functionp function)
;; The 'split-window' parameter specifies the function to call.
;; If that function is `ignore', do nothing.
(throw 'done (funcall function window size side)))
;; If WINDOW is part of an atomic window, split the root window
;; of that atomic window instead.
((and (window-parameter window 'window-atom)
(setq atom-root (window-atom-root window))
(not (eq atom-root window)))
(throw 'done (split-window atom-root size side pixelwise)))
;; If WINDOW is a side window or its first or last child is a
;; side window, throw an error unless `window-combination-resize'
;; equals 'side.
((and (not (eq window-combination-resize 'side))
(window-parameter window 'window-side))
(error "Cannot split side window or parent of side window"))
;; If `window-combination-resize' is 'side and window has a side
;; window sibling, bind `window-combination-limit' to t.
((and (not (eq window-combination-resize 'side))
(or (and (window-prev-sibling window)
(window-parameter
(window-prev-sibling window) 'window-side))
(and (window-next-sibling window)
(window-parameter
(window-next-sibling window) 'window-side))))
(setq window-combination-limit t)))
;; If `window-combination-resize' is t and SIZE is non-negative,
;; bind `window-combination-limit' to t.
(when (and (eq window-combination-resize t)
pixel-size (> pixel-size 0))
(setq window-combination-limit t))
(let* ((parent-pixel-size
;; 'parent-pixel-size' is the pixel size of WINDOW's
;; parent, provided it has one.
(when parent (window-size parent horizontal t)))
;; 'resize' non-nil means we are supposed to resize other
;; windows in WINDOW's combination.
(resize
(and window-combination-resize
(or (window-parameter window 'window-side)
(not (eq window-combination-resize 'side)))
(not (eq window-combination-limit t))
;; Resize makes sense in iso-combinations only.
(window-combined-p window horizontal)))
;; 'old-pixel-size' is the current pixel size of WINDOW.
(old-pixel-size (window-size window horizontal t))
;; 'new-size' is the specified or calculated size of the
;; new window.
new-pixel-size new-parent new-normal)
(cond
((not pixel-size)
(setq new-pixel-size
(if resize
;; When resizing try to give the new window the
;; average size of a window in its combination.
(max (min (- parent-pixel-size
(window-min-size parent horizontal nil t))
(window--combination-resizable parent horizontal))
(window-min-pixel-size))
;; Else try to give the new window half the size
;; of WINDOW (plus an eventual odd pixel).
(/ old-pixel-size 2)))
(unless window-resize-pixelwise
;; Round to nearest char-size multiple.
(setq new-pixel-size
(* char-size (round new-pixel-size char-size)))))
((>= pixel-size 0)
;; SIZE non-negative specifies the new size of WINDOW.
;; Note: Specifying a non-negative SIZE is practically
;; always done as workaround for making the new window
;; appear above or on the left of the new window (the
;; ispell window is a typical example of that). In all
;; these cases the SIDE argument should be set to 'above
;; or 'left in order to support the 'resize option.
;; Here we have to nest the windows instead, see above.
(setq new-pixel-size (- old-pixel-size pixel-size)))
(t
;; SIZE negative specifies the size of the new window.
(setq new-pixel-size (- pixel-size))))
;; Check SIZE.
(cond
((not pixel-size)
(cond
(resize
;; SIZE unspecified, resizing.
(unless (or (window-sizable-p
parent (- (+ new-pixel-size divider-width)) horizontal
nil t)
(window-sizable-p
parent (- (+ new-pixel-size divider-width)) horizontal
(setq ignore 'preserved) t))
(error "Window %s too small for splitting" parent)))
((and (> (+ new-pixel-size divider-width
(window-min-size window horizontal nil t))
old-pixel-size)
(> (+ new-pixel-size divider-width
(window-min-size
window horizontal (setq ignore 'preserved) t))
old-pixel-size))
;; SIZE unspecified, no resizing.
(error "Window %s too small for splitting" window))))
((and (>= pixel-size 0)
(or (>= pixel-size old-pixel-size)
(< new-pixel-size
(window-safe-min-pixel-size window horizontal))))
;; SIZE specified as new size of old window. If the new size
;; is larger than the old size or the size of the new window
;; would be less than the safe minimum, signal an error.
(error "Window %s too small for splitting" window))
(resize
;; SIZE specified, resizing.
(unless (or (window-sizable-p
parent (- (+ new-pixel-size divider-width)) horizontal
nil t)
(window-sizable-p
parent (- (+ new-pixel-size divider-width)) horizontal
(setq ignore 'preserved) t))
;; If we cannot resize the parent give up.
(error "Window %s too small for splitting" parent)))
((or (< new-pixel-size
(window-safe-min-pixel-size window horizontal))
(< (- old-pixel-size new-pixel-size)
(window-safe-min-pixel-size window horizontal)))
;; SIZE specification violates minimum size restrictions.
(error "Window %s too small for splitting" window)))
(window--resize-reset frame horizontal)
(setq new-parent
;; Make new-parent non-nil if we need a new parent window;
;; either because we want to nest or because WINDOW is not
;; iso-combined.
(or (eq window-combination-limit t)
(not (window-combined-p window horizontal))))
(setq new-normal
;; Make new-normal the normal size of the new window.
(cond
(pixel-size (/ (float new-pixel-size)
(if new-parent old-pixel-size parent-pixel-size)))
(new-parent 0.5)
(resize (/ 1.0 (1+ (window-combinations parent horizontal t))))
(t (/ (window-normal-size window horizontal) 2.0))))
(if resize
;; Try to get space from OLD's siblings. We could go "up" and
;; try getting additional space from surrounding windows but
;; we won't be able to return space to those windows when we
;; delete the one we create here. Hence we do not go up.
(progn
(window--resize-child-windows
parent (- new-pixel-size) horizontal nil ignore)
(let* ((normal (- 1.0 new-normal))
(sub (window-child parent)))
(while sub
(set-window-new-normal
sub (* (window-normal-size sub horizontal) normal))
(setq sub (window-right sub)))))
;; Get entire space from WINDOW.
(set-window-new-pixel
window (- old-pixel-size new-pixel-size))
(window--resize-this-window
window (- new-pixel-size) horizontal ignore)
(set-window-new-normal
window (- (if new-parent 1.0 (window-normal-size window horizontal))
new-normal)))
(let* ((new (split-window-internal window new-pixel-size side new-normal)))
(window--pixel-to-total frame horizontal)
;; Assign window-side parameters, if any.
(cond
((eq window-combination-resize 'side)
(let ((window-side
(cond
(window-side window-side)
((eq side 'above) 'top)
((eq side 'below) 'bottom)
(t side))))
;; We made a new side window.
(set-window-parameter new 'window-side window-side)
(when (and new-parent (window-parameter window 'window-side))
;; We've been splitting a side root window. Give the
;; new parent the same window-side parameter.
(set-window-parameter
(window-parent new) 'window-side window-side))))
((eq window-combination-resize 'atom)
;; Make sure `window--check' won't destroy an existing
;; atomic window in case the new window gets nested inside.
(unless (window-parameter window 'window-atom)
(set-window-parameter window 'window-atom t))
(when new-parent
(set-window-parameter (window-parent new) 'window-atom t))
(set-window-parameter new 'window-atom t)))
;; Make the new window inherit the `min-margins' parameter of
;; WINDOW (Bug#44483).
(let ((min-margins (window-parameter window 'min-margins)))
(when min-margins
(set-window-parameter new 'min-margins min-margins)))
;; Sanitize sizes unless SIZE was specified.
(unless size
(window--sanitize-window-sizes horizontal))
(run-window-scroll-functions new)
(window--check frame)
;; Always return the new window.
new)))))
(defun split-window-no-error (&optional window size side pixelwise)
"Make a new window adjacent to WINDOW.
This function is like `split-window' but does not signal an error
when WINDOW cannot be split.
For the meaning of all arguments see the documentation of
`split-window'."
(condition-case nil
(split-window window size side pixelwise)
(error nil)))
;; I think this should be the default; I think people will prefer it--rms.
(defcustom split-window-keep-point t
"If non-nil, \\[split-window-below] preserves point in the new window.
If nil, adjust point in the two windows to minimize redisplay.
This option applies only to `split-window-below' and functions
that call it. The low-level `split-window' function always keeps
the original point in both windows."
:type 'boolean
:group 'windows)
(defun split-window-below (&optional size)
"Split the selected window into two windows, one above the other.
The selected window is above. The newly split-off window is
below and displays the same buffer. Return the new window.
If optional argument SIZE is omitted or nil, both windows get the
same height, or close to it. If SIZE is positive, the upper
\(selected) window gets SIZE lines. If SIZE is negative, the
lower (new) window gets -SIZE lines.
If the variable `split-window-keep-point' is non-nil, both
windows get the same value of point as the selected window.
Otherwise, the window starts are chosen so as to minimize the
amount of redisplay; this is convenient on slow terminals."
(interactive "P")
(let ((old-window (selected-window))
(old-point (window-point))
(size (and size (prefix-numeric-value size)))
moved-by-window-height moved new-window bottom)
(when (and size (< size 0) (< (- size) window-min-height))
;; `split-window' would not signal an error here.
(error "Size of new window too small"))
(setq new-window (split-window nil size))
(unless split-window-keep-point
(with-current-buffer (window-buffer)
;; Use `save-excursion' around vertical movements below
;; (Bug#10971). Note: When the selected window's buffer has a
;; header line, up to two lines of the buffer may not show up
;; in the resulting configuration.
(save-excursion
(goto-char (window-start))
(setq moved (vertical-motion (window-height)))
(set-window-start new-window (point))
(when (> (point) (window-point new-window))
(set-window-point new-window (point)))
(when (= moved (window-height))
(setq moved-by-window-height t)
(vertical-motion -1))
(setq bottom (point)))
(and moved-by-window-height
(<= bottom (point))
(set-window-point old-window (1- bottom)))
(and moved-by-window-height
(<= (window-start new-window) old-point)
(set-window-point new-window old-point)
(select-window new-window))))
;; Always copy quit-restore parameter in interactive use.
(let ((quit-restore (window-parameter old-window 'quit-restore)))
(when quit-restore
(set-window-parameter new-window 'quit-restore quit-restore)))
new-window))
(defalias 'split-window-vertically 'split-window-below)
(defun split-window-right (&optional size)
"Split the selected window into two side-by-side windows.
The selected window is on the left. The newly split-off window
is on the right and displays the same buffer. Return the new
window.
If optional argument SIZE is omitted or nil, both windows get the
same width, or close to it. If SIZE is positive, the left-hand
\(selected) window gets SIZE columns. If SIZE is negative, the
right-hand (new) window gets -SIZE columns. Here, SIZE includes
the width of the window's scroll bar; if there are no scroll
bars, it includes the width of the divider column to the window's
right, if any."
(interactive "P")
(let ((old-window (selected-window))
(size (and size (prefix-numeric-value size)))
new-window)
(when (and size (< size 0) (< (- size) window-min-width))
;; `split-window' would not signal an error here.
(error "Size of new window too small"))
(setq new-window (split-window nil size t))
;; Always copy quit-restore parameter in interactive use.
(let ((quit-restore (window-parameter old-window 'quit-restore)))
(when quit-restore
(set-window-parameter new-window 'quit-restore quit-restore)))
new-window))
(defalias 'split-window-horizontally 'split-window-right)
\f
;;; Balancing windows.
;; The following routine uses the recycled code from an old version of
;; `window--resize-child-windows'. It's not very pretty, but coding it the way the
;; new `window--resize-child-windows' code does would hardly make it any shorter or
;; more readable (FWIW we'd need three loops - one to calculate the
;; minimum sizes per window, one to enlarge or shrink windows until the
;; new parent-size matches, and one where we shrink the largest/enlarge
;; the smallest window).
(defun balance-windows-2 (window horizontal)
"Subroutine of `balance-windows-1'.
WINDOW must be a vertical combination (horizontal if HORIZONTAL
is non-nil)."
(let* ((char-size (if window-resize-pixelwise
1
(frame-char-size window horizontal)))
(first (window-child window))
(sub first)
(number-of-children 0)
(parent-size (window-new-pixel window))
(total-sum parent-size)
failed size sub-total sub-delta sub-amount rest)
(while sub
(if (window-size-fixed-p sub horizontal)
(progn
(setq total-sum
(- total-sum (window-size sub horizontal t)))
(set-window-new-normal sub 'ignore))
(setq number-of-children (1+ number-of-children)))
(setq sub (window-right sub)))
(setq failed t)
(while (and failed (> number-of-children 0))
(setq size (/ total-sum number-of-children))
(setq failed nil)
(setq sub first)
(while (and sub (not failed))
;; Ignore child windows that should be ignored or are stuck.
(unless (window--resize-child-windows-skip-p sub)
(setq sub-total (window-size sub horizontal t))
(setq sub-delta (- size sub-total))
(setq sub-amount
(window-sizable sub sub-delta horizontal nil t))
;; Register the new total size for this child window.
(set-window-new-pixel sub (+ sub-total sub-amount))
(unless (= sub-amount sub-delta)
(setq total-sum (- total-sum sub-total sub-amount))
(setq number-of-children (1- number-of-children))
;; We failed and need a new round.
(setq failed t)
(set-window-new-normal sub 'skip)))
(setq sub (window-right sub))))
(when (> number-of-children 0)
(setq rest (% total-sum number-of-children))
;; Fix rounding by trying to enlarge non-stuck windows by one line
;; (column) until `rest' is zero.
(setq sub first)
(while (and sub (> rest 0))
(unless (window--resize-child-windows-skip-p window)
(set-window-new-pixel sub (min rest char-size) t)
(setq rest (- rest char-size)))
(setq sub (window-right sub))))
;; Fix rounding by trying to enlarge stuck windows by one line
;; (column) until `rest' equals zero.
(setq sub first)
(while (and sub (> rest 0))
(unless (eq (window-new-normal sub) 'ignore)
(set-window-new-pixel sub (min rest char-size) t)
(setq rest (- rest char-size)))
(setq sub (window-right sub)))
(setq sub first)
(while sub
;; Record new normal sizes.
(set-window-new-normal
sub (/ (if (eq (window-new-normal sub) 'ignore)
(window-size sub horizontal t)
(window-new-pixel sub))
(float parent-size)))
;; Recursively balance each window's child windows.
(balance-windows-1 sub horizontal)
(setq sub (window-right sub)))))
(defun balance-windows-1 (window &optional horizontal)
"Subroutine of `balance-windows'."
(if (window-child window)
(let ((sub (window-child window)))
(if (window-combined-p sub horizontal)
(balance-windows-2 window horizontal)
(let ((size (window-new-pixel window)))
(while sub
(set-window-new-pixel sub size)
(balance-windows-1 sub horizontal)
(setq sub (window-right sub))))))))
(defun balance-windows (&optional window-or-frame)
"Balance the sizes of windows of WINDOW-OR-FRAME.
WINDOW-OR-FRAME is optional and defaults to the selected frame.
If WINDOW-OR-FRAME denotes a frame, balance the sizes of all
windows of that frame. If WINDOW-OR-FRAME denotes a window,
recursively balance the sizes of all child windows of that
window."
(interactive)
(let* ((window
(cond
((or (not window-or-frame)
(frame-live-p window-or-frame))
(frame-root-window window-or-frame))
((or (window-live-p window-or-frame)
(window-child window-or-frame))
window-or-frame)
(t
(error "Not a window or frame %s" window-or-frame))))
(frame (window-frame window)))
;; Balance vertically.
(window--resize-reset (window-frame window))
(balance-windows-1 window)
(when (window--resize-apply-p frame)
(window-resize-apply frame)
(window--pixel-to-total frame))
;; Balance horizontally.
(window--resize-reset (window-frame window) t)
(balance-windows-1 window t)
(when (window--resize-apply-p frame t)
(window-resize-apply frame t)
(window--pixel-to-total frame t))))
(defun window-fixed-size-p (&optional window direction)
"Return t if WINDOW cannot be resized in DIRECTION.
WINDOW defaults to the selected window. DIRECTION can be
nil (i.e. any), `height' or `width'."
(with-current-buffer (window-buffer window)
(and window-size-fixed
(not (and direction
(member (cons direction window-size-fixed)
'((height . width) (width . height))))))))
;;; A different solution to balance-windows.
(defvar-local window-area-factor 1
"Factor by which the window area should be over-estimated.
This is used by `balance-windows-area'.
Changing this globally has no effect.")
(defun balance-windows-area-adjust (window delta horizontal pixelwise)
"Wrapper around `window-resize' with error checking.
Arguments WINDOW, DELTA and HORIZONTAL are passed on to that function."
;; `window-resize' may fail if delta is too large.
(while (>= (abs delta) 1)
(condition-case nil
(progn
;; It was wrong to use `window-resize' here. Somehow
;; `balance-windows-area' depends on resizing windows
;; asymmetrically.
(adjust-window-trailing-edge window delta horizontal pixelwise)
(setq delta 0))
(error
;;(message "adjust: %s" (error-message-string err))
(setq delta (/ delta 2))))))
(defun balance-windows-area ()
"Make all visible windows the same area (approximately).
See also `window-area-factor' to change the relative size of
specific buffers."
(interactive)
(let* ((unchanged 0) (carry 0) (round 0)
;; Remove fixed-size windows.
(wins (delq nil (mapcar (lambda (win)
(if (not (window-fixed-size-p win)) win))
(window-list nil 'nomini))))
(changelog nil)
(pixelwise window-resize-pixelwise)
next)
;; Resizing a window changes the size of surrounding windows in complex
;; ways, so it's difficult to balance them all. The introduction of
;; `adjust-window-trailing-edge' made it a bit easier, but it is still
;; very difficult to do. `balance-window' above takes an off-line
;; approach: get the whole window tree, then balance it, then try to
;; adjust the windows so they fit the result.
;; Here, instead, we take a "local optimization" approach, where we just
;; go through all the windows several times until nothing needs to be
;; changed. The main problem with this approach is that it's difficult
;; to make sure it terminates, so we use some heuristic to try and break
;; off infinite loops.
;; After a round without any change, we allow a second, to give a chance
;; to the carry to propagate a minor imbalance from the end back to
;; the beginning.
(while (< unchanged 2)
;; (message "New round")
(setq unchanged (1+ unchanged) round (1+ round))
(dolist (win wins)
(setq next win)
(while (progn (setq next (next-window next))
(window-fixed-size-p next)))
;; (assert (eq next (or (cadr (member win wins)) (car wins))))
(let* ((horiz
(< (car (window-pixel-edges win)) (car (window-pixel-edges next))))
(areadiff (/ (- (* (window-size next nil pixelwise)
(window-size next t pixelwise)
(buffer-local-value 'window-area-factor
(window-buffer next)))
(* (window-size win nil pixelwise)
(window-size win t pixelwise)
(buffer-local-value 'window-area-factor
(window-buffer win))))
(max (buffer-local-value 'window-area-factor
(window-buffer win))
(buffer-local-value 'window-area-factor
(window-buffer next)))))
(edgesize (if horiz
(+ (window-size win nil pixelwise)
(window-size next nil pixelwise))
(+ (window-size win t pixelwise)
(window-size next t pixelwise))))
(diff (/ areadiff edgesize)))
(when (zerop diff)
;; Maybe diff is actually closer to 1 than to 0.
(setq diff (/ (* 3 areadiff) (* 2 edgesize))))
(when (and (zerop diff) (not (zerop areadiff)))
(setq diff (/ (+ areadiff carry) edgesize))
;; Change things smoothly.
(if (or (> diff 1) (< diff -1)) (setq diff (/ diff 2))))
(if (zerop diff)
;; Make sure negligible differences don't accumulate to
;; become significant.
(setq carry (+ carry areadiff))
;; This used `adjust-window-trailing-edge' before and uses
;; `window-resize' now. Error wrapping is still needed.
(balance-windows-area-adjust win diff horiz pixelwise)
;; (sit-for 0.5)
(let ((change (cons win (window-pixel-edges win))))
;; If the same change has been seen already for this window,
;; we're most likely in an endless loop, so don't count it as
;; a change.
(unless (member change changelog)
(push change changelog)
(setq unchanged 0 carry 0)))))))
;; We've now basically balanced all the windows.
;; But there may be some minor off-by-one imbalance left over,
;; so let's do some fine tuning.
;; (bw-finetune wins)
;; (message "Done in %d rounds" round)
))
;;; Window states, how to get them and how to put them in a window.
(defun window--state-get-1 (window &optional writable)
"Helper function for `window-state-get'."
(let* ((type
(cond
((window-top-child window) 'vc)
((window-left-child window) 'hc)
(t 'leaf)))
(buffer (window-buffer window))
(selected (eq window (selected-window)))
(next-buffers (when (window-live-p window)
(delq nil (mapcar (lambda (buffer)
(and (buffer-live-p buffer) buffer))
(window-next-buffers window)))))
(prev-buffers (when (window-live-p window)
(delq nil (mapcar (lambda (entry)
(and (buffer-live-p (nth 0 entry))
entry))
(window-prev-buffers window)))))
(head
`(,type
,@(unless (window-next-sibling window) '((last . t)))
(pixel-width . ,(window-pixel-width window))
(pixel-height . ,(window-pixel-height window))
(total-width . ,(window-total-width window))
(total-height . ,(window-total-height window))
(normal-height . ,(window-normal-size window))
(normal-width . ,(window-normal-size window t))
,@(unless (window-live-p window)
`((combination-limit . ,(window-combination-limit window))))
,@(let ((parameters (window-parameters window))
list)
;; Make copies of those window parameters whose
;; persistence property is `writable' if WRITABLE is
;; non-nil and non-nil if WRITABLE is nil.
(dolist (par parameters)
(let ((pers (cdr (assq (car par)
window-persistent-parameters))))
(when (and pers (or (not writable) (eq pers 'writable)))
(setq list (cons (cons (car par) (cdr par)) list)))))
;; Add `clone-of' parameter if necessary.
(let ((pers (cdr (assq 'clone-of
window-persistent-parameters))))
(when (and pers (or (not writable) (eq pers 'writable))
(not (assq 'clone-of list)))
(setq list (cons (cons 'clone-of window) list))))
(when list
`((parameters . ,list))))
,@(when buffer
;; All buffer related things go in here.
(let ((point (window-point window))
(start (window-start window)))
`((buffer
,(if writable (buffer-name buffer) buffer)
(selected . ,selected)
(hscroll . ,(window-hscroll window))
(fringes . ,(window-fringes window))
(margins . ,(window-margins window))
(scroll-bars . ,(window-scroll-bars window))
(vscroll . ,(window-vscroll window))
(dedicated . ,(window-dedicated-p window))
(point . ,(if writable
point
(with-current-buffer buffer
(copy-marker point
(buffer-local-value
'window-point-insertion-type
buffer)))))
(start . ,(if writable
start
(with-current-buffer buffer
(copy-marker start))))))))
,@(when next-buffers
`((next-buffers
. ,(if writable
(mapcar (lambda (buffer) (buffer-name buffer))
next-buffers)
next-buffers))))
,@(when prev-buffers
`((prev-buffers
. ,(if writable
(mapcar (lambda (entry)
(list (buffer-name (nth 0 entry))
(marker-position (nth 1 entry))
(marker-position (nth 2 entry))))
prev-buffers)
prev-buffers))))))
(tail
(when (memq type '(vc hc))
(let (list)
(setq window (window-child window))
(while window
(setq list (cons (window--state-get-1 window writable) list))
(setq window (window-right window)))
(nreverse list)))))
(append head tail)))
(defun window-state-get (&optional window writable)
"Return state of WINDOW as a Lisp object.
WINDOW can be any window and defaults to the root window of the
selected frame.
Optional argument WRITABLE non-nil means do not use markers for
sampling `window-point' and `window-start'. Together, WRITABLE
and the variable `window-persistent-parameters' specify which
window parameters are saved by this function. WRITABLE should be
non-nil when the return value shall be written to a file and read
back in another session. Otherwise, an application may run into
an `invalid-read-syntax' error while attempting to read back the
value from file.
The return value can be used as argument for `window-state-put'
to put the state recorded here into an arbitrary window. The
value can be also stored on disk and read back in a new session."
(setq window
(if window
(if (window-valid-p window)
window
(error "%s is not a live or internal window" window))
(frame-root-window)))
;; The return value is a cons whose car specifies some constraints on
;; the size of WINDOW. The cdr lists the states of the child windows
;; of WINDOW.
(cons
;; Frame related things would go into a function, say `frame-state',
;; calling `window-state-get' to insert the frame's root window.
`((min-height . ,(window-min-size window))
(min-width . ,(window-min-size window t))
(min-height-ignore . ,(window-min-size window nil t))
(min-width-ignore . ,(window-min-size window t t))
(min-height-safe . ,(window-min-size window nil 'safe))
(min-width-safe . ,(window-min-size window t 'safe))
(min-pixel-height . ,(window-min-size window nil nil t))
(min-pixel-width . ,(window-min-size window t nil t))
(min-pixel-height-ignore . ,(window-min-size window nil t t))
(min-pixel-width-ignore . ,(window-min-size window t t t))
(min-pixel-height-safe . ,(window-min-size window nil 'safe t))
(min-pixel-width-safe . ,(window-min-size window t 'safe t)))
(window--state-get-1 window writable)))
(defvar window-state-put-list nil
"Helper variable for `window-state-put'.")
(defvar window-state-put-stale-windows nil
"Helper variable for `window-state-put'.")
(defun window--state-put-1 (state &optional window ignore totals pixelwise)
"Helper function for `window-state-put'."
(let ((type (car state)))
(setq state (cdr state))
(cond
((eq type 'leaf)
;; For a leaf window just add unprocessed entries to
;; `window-state-put-list'.
(push (cons window state) window-state-put-list))
((memq type '(vc hc))
(let* ((horizontal (eq type 'hc))
(total (window-size window horizontal pixelwise))
(first t)
(window-combination-limit (cdr (assq 'combination-limit state)))
size new)
(dolist (item state)
;; Find the next child window. WINDOW always points to the
;; real window that we want to fill with what we find here.
(when (memq (car item) '(leaf vc hc))
(if (assq 'last item)
;; The last child window. Below `window--state-put-1'
;; will put into it whatever ITEM has in store.
(setq new nil)
;; Not the last child window, prepare for splitting
;; WINDOW. SIZE is the new (and final) size of the old
;; window.
(setq size
(if totals
;; Use total size.
(if pixelwise
(cdr (assq (if horizontal
'pixel-width
'pixel-height)
item))
(cdr (assq (if horizontal
'total-width
'total-height)
item)))
;; Use normalized size and round.
(round
(* total
(cdr (assq (if horizontal 'normal-width 'normal-height)
item))))))
;; Use safe sizes, we try to resize later.
(setq size (max size
(if horizontal
(* window-safe-min-width
(if pixelwise
(frame-char-width (window-frame window))
1))
(* window-safe-min-height
(if pixelwise
(frame-char-height (window-frame window))
1)))))
(if (window-sizable-p window (- size) horizontal 'safe pixelwise)
(progn
(setq new (split-window-no-error
window size horizontal pixelwise))
(setq window-combination-limit nil))
;; Give up if we can't resize window down to safe sizes.
(error "Cannot resize window %s" window))
(when first
(setq first nil)
;; When creating the first child window add for parent
;; unprocessed entries to `window-state-put-list'.
(setq window-state-put-list
(cons (cons (window-parent window) state)
window-state-put-list))))
;; Now process the current window (either the one we've just
;; split or the last child of its parent).
(window--state-put-1 item window ignore totals)
;; Continue with the last window split off.
(setq window new))))))))
(defun window--state-put-2 (ignore pixelwise)
"Helper function for `window-state-put'."
(dolist (item window-state-put-list)
(let ((window (car item))
(combination-limit (cdr (assq 'combination-limit item)))
(parameters (cdr (assq 'parameters item)))
(state (cdr (assq 'buffer item)))
(next-buffers (cdr (assq 'next-buffers item)))
(prev-buffers (cdr (assq 'prev-buffers item))))
(when combination-limit
(set-window-combination-limit window combination-limit))
;; Reset window's parameters and assign saved ones (we might want
;; a `remove-window-parameters' function here).
(dolist (parameter (window-parameters window))
(set-window-parameter window (car parameter) nil))
(when parameters
(dolist (parameter parameters)
(set-window-parameter window (car parameter) (cdr parameter))))
;; Process buffer related state.
(when state
(let ((buffer (get-buffer (car state)))
(state (cdr state)))
(if buffer
(with-current-buffer buffer
(set-window-buffer window buffer)
(set-window-hscroll window (cdr (assq 'hscroll state)))
(apply 'set-window-fringes
(cons window (cdr (assq 'fringes state))))
(let ((margins (cdr (assq 'margins state))))
(set-window-margins window (car margins) (cdr margins)))
(let ((scroll-bars (cdr (assq 'scroll-bars state))))
(set-window-scroll-bars
window (car scroll-bars) (nth 2 scroll-bars)
(nth 3 scroll-bars) (nth 5 scroll-bars) (nth 6 scroll-bars)))
(set-window-vscroll window (cdr (assq 'vscroll state)))
;; Adjust vertically.
(if (or (memq window-size-fixed '(t height))
(window-preserved-size window))
;; A fixed height window, try to restore the
;; original size.
(let ((delta
(- (cdr (assq
(if pixelwise 'pixel-height 'total-height)
item))
(window-size window nil pixelwise)))
window-size-fixed)
(when (window--resizable-p
window delta nil nil nil nil nil pixelwise)
(window-resize window delta nil nil pixelwise)))
;; Else check whether the window is not high enough.
(let* ((min-size
(window-min-size window nil ignore pixelwise))
(delta
(- min-size (window-size window nil pixelwise))))
(when (and (> delta 0)
(window--resizable-p
window delta nil ignore nil nil nil pixelwise))
(window-resize window delta nil ignore pixelwise))))
;; Adjust horizontally.
(if (or (memq window-size-fixed '(t width))
(window-preserved-size window t))
;; A fixed width window, try to restore the original
;; size.
(let ((delta
(- (cdr (assq
(if pixelwise 'pixel-width 'total-width)
item))
(window-size window t pixelwise)))
window-size-fixed)
(when (window--resizable-p
window delta t nil nil nil nil pixelwise)
(window-resize window delta t nil pixelwise)))
;; Else check whether the window is not wide enough.
(let* ((min-size (window-min-size window t ignore pixelwise))
(delta (- min-size (window-size window t pixelwise))))
(when (and (> delta 0)
(window--resizable-p
window delta t ignore nil nil nil pixelwise))
(window-resize window delta t ignore pixelwise))))
;; Set dedicated status.
(set-window-dedicated-p window (cdr (assq 'dedicated state)))
;; Install positions (maybe we should do this after all
;; windows have been created and sized).
(ignore-errors
;; Set 'noforce argument to avoid that window start
;; overrides window point set below (Bug#24240).
(set-window-start window (cdr (assq 'start state)) 'noforce)
(set-window-point window (cdr (assq 'point state))))
;; Select window if it's the selected one.
(when (cdr (assq 'selected state))
(select-window window))
(set-window-next-buffers
window
(delq nil (mapcar (lambda (buffer)
(setq buffer (get-buffer buffer))
(when (buffer-live-p buffer) buffer))
next-buffers)))
(set-window-prev-buffers
window
(delq nil (mapcar (lambda (entry)
(let ((buffer (get-buffer (nth 0 entry)))
(m1 (nth 1 entry))
(m2 (nth 2 entry)))
(when (buffer-live-p buffer)
(list buffer
(if (markerp m1) m1
(set-marker (make-marker) m1
buffer))
(if (markerp m2) m2
(set-marker (make-marker) m2
buffer))))))
prev-buffers))))
;; We don't want to raise an error in case the buffer does
;; not exist anymore, so we switch to a previous one and
;; save the window with the intention of deleting it later
;; if possible.
(switch-to-prev-buffer window)
(push window window-state-put-stale-windows)))))))
(defun window-state-put (state &optional window ignore)
"Put window state STATE into WINDOW.
STATE should be the state of a window returned by an earlier
invocation of `window-state-get'. Optional argument WINDOW must
specify a valid window. If WINDOW is not a live window,
replace WINDOW by a new live window created on the same frame.
If WINDOW is nil, create a new window before putting STATE into it.
Optional argument IGNORE non-nil means ignore minimum window
sizes and fixed size restrictions. IGNORE equal `safe' means
windows can get as small as `window-safe-min-height' and
`window-safe-min-width'."
(setq window-state-put-stale-windows nil)
;; When WINDOW is internal or nil, reduce it to a live one,
;; then create a new window on the same frame to put STATE into.
(unless (window-live-p window)
(let ((root window))
(setq window (if root
(catch 'live
(walk-window-subtree
(lambda (window)
(when (and (window-live-p window)
(not (window-parameter
window 'window-side)))
(throw 'live window)))
root))
(selected-window)))
(delete-other-windows-internal window root)
;; Create a new window to replace the existing one.
(setq window (prog1 (split-window window)
(delete-window window)))))
(set-window-dedicated-p window nil)
(let* ((frame (window-frame window))
(head (car state))
;; We check here (1) whether the total sizes of root window of
;; STATE and that of WINDOW are equal so we can avoid
;; calculating new sizes, and (2) if we do have to resize
;; whether we can do so without violating size restrictions.
(pixelwise (and (cdr (assq 'pixel-width state))
(cdr (assq 'pixel-height state))))
(totals (or (and pixelwise
(= (window-pixel-width window)
(cdr (assq 'pixel-width state)))
(= (window-pixel-height window)
(cdr (assq 'pixel-height state))))
(and (= (window-total-width window)
(cdr (assq 'total-width state)))
(= (window-total-height window)
(cdr (assq 'total-height state))))))
(min-height (cdr (assq
(if pixelwise 'min-pixel-height 'min-height)
head)))
(min-width (cdr (assq
(if pixelwise 'min-pixel-width 'min-weight)
head))))
(if (and (not totals)
(or (> min-height (window-size window nil pixelwise))
(> min-width (window-size window t pixelwise)))
(or (not ignore)
(and (setq min-height
(cdr (assq
(if pixelwise
'min-pixel-height-ignore
'min-height-ignore)
head)))
(setq min-width
(cdr (assq
(if pixelwise
'min-pixel-width-ignore
'min-width-ignore)
head)))
(or (> min-height
(window-size window nil pixelwise))
(> min-width
(window-size window t pixelwise)))
(or (not (eq ignore 'safe))
(and (setq min-height
(cdr (assq
(if pixelwise
'min-pixel-height-safe
'min-height-safe)
head)))
(setq min-width
(cdr (assq
(if pixelwise
'min-pixel-width-safe
'min-width-safe)
head)))
(or (> min-height
(window-size window nil pixelwise))
(> min-width
(window-size window t pixelwise))))))))
;; The check above might not catch all errors due to rounding
;; issues - so IGNORE equal 'safe might not always produce the
;; minimum possible state. But such configurations hardly make
;; sense anyway.
(error "Window %s too small to accommodate state" window)
(setq state (cdr state))
(setq window-state-put-list nil)
;; Work on the windows of a temporary buffer to make sure that
;; splitting proceeds regardless of any buffer local values of
;; `window-size-fixed'. Release that buffer after the buffers of
;; all live windows have been set by `window--state-put-2'.
(with-temp-buffer
(set-window-buffer window (current-buffer))
(window--state-put-1 state window nil totals pixelwise)
(window--state-put-2 ignore pixelwise))
(while window-state-put-stale-windows
(let ((window (pop window-state-put-stale-windows)))
(when (eq (window-deletable-p window) t)
(delete-window window))))
(window--check frame))))
(defun window-state-buffers (state)
"Return all buffers saved to the given window state STATE."
(let ((buffer (cadr (assq 'buffer state)))
(buffers (mapcan (lambda (item)
(when (memq (car item) '(leaf vc hc))
(window-state-buffers item)))
(if (consp (car state)) (list (cdr state)) (cdr state)))))
(if buffer (cons buffer buffers) buffers)))
(defun window-swap-states (&optional window-1 window-2 size)
"Swap the states of live windows WINDOW-1 and WINDOW-2.
WINDOW-1 must specify a live window and defaults to the selected
one. WINDOW-2 must specify a live window and defaults to the
window following WINDOW-1 in the cyclic ordering of windows,
excluding minibuffer windows and including live windows on all
visible frames.
Optional argument SIZE non-nil means to try swapping the sizes of
WINDOW-1 and WINDOW-2 as well. A value of `height' means to swap
heights only, a value of `width' means to swap widths only, while
t means to swap both widths and heights, if possible. Frames are
not resized by this function."
(interactive)
(setq window-1 (window-normalize-window window-1 t))
(if window-2
(unless (window-live-p window-2)
(error "%s is not a live window" window-2))
(setq window-2 (next-window window-1 'nomini 'visible)))
(unless (eq window-1 window-2)
(let* ((height (memq size '(t height)))
(width (memq size '(t width)))
(state-1 (window-state-get window-1))
(width-1 (and width (window-text-width window-1 t)))
(height-1 (and height (window-text-height window-1 t)))
(state-2 (window-state-get window-2))
(width-2 (and width (window-text-width window-2 t)))
(height-2 (and height (window-text-height window-2 t)))
old preserved)
;; Swap basic states.
(window-state-put state-1 window-2 t)
(window-state-put state-2 window-1 t)
;; Swap overlays with `window' property.
(with-current-buffer (window-buffer window-1)
(dolist (overlay (overlays-in (point-min) (point-max)))
(let ((window (overlay-get overlay 'window)))
(cond
((not window))
((eq window window-1)
(overlay-put overlay 'window window-2))
((eq window window-2)
(overlay-put overlay 'window window-1))))))
(unless (eq (window-buffer window-1) (window-buffer window-2))
(with-current-buffer (window-buffer window-2)
(dolist (overlay (overlays-in (point-min) (point-max)))
(let ((window (overlay-get overlay 'window)))
(cond
((not window))
((eq window window-1)
(overlay-put overlay 'window window-2))
((eq window window-2)
(overlay-put overlay 'window window-1)))))))
;; Try to swap window sizes.
(when size
(unless (= (setq old (window-text-width window-1 t)) width-2)
(window-resize-no-error window-1 (- width-2 old) t t t))
(unless (= (setq old (window-text-width window-2 t)) width-1)
(setq preserved (window-preserved-size window-1 t))
(window-preserve-size window-1 t t)
(window-resize-no-error window-2 (- width-1 old) t t t)
(window-preserve-size window-1 t preserved))
(unless (= (setq old (window-text-height window-1 t)) height-2)
(window-resize-no-error window-1 (- height-2 old) nil t t))
(unless (= (setq old (window-text-height window-2 t)) height-1)
(setq preserved (window-preserved-size window-1))
(window-preserve-size window-1 nil t)
(window-resize-no-error window-2 (- height-1 old) nil t t)
(window-preserve-size window-1 nil preserved))))))
\f
(defun display-buffer-record-window (type window buffer)
"Record information for window used by `display-buffer'.
WINDOW is the window used for or created by a buffer display
action function. BUFFER is the buffer to display. Note that
this function must be called before BUFFER is explicitly made
WINDOW's buffer (although WINDOW may show BUFFER already).
TYPE specifies the type of the calling operation and must be one
of the symbols `reuse' (meaning that WINDOW exists already and
will be used for displaying BUFFER), `window' (WINDOW was created
on an already existing frame) or `frame' (WINDOW was created on a
new frame).
This function installs or updates the `quit-restore' parameter of
WINDOW. The `quit-restore' parameter is a list of four elements:
The first element is one of the symbols `window', `frame', `same'
or `other'. The second element is either one of the symbols
`window' or `frame' or a list whose elements are the buffer
previously shown in the window, that buffer's window start and
window point, and the window's height. The third element is the
window selected at the time the parameter was created. The
fourth element is BUFFER."
(cond
((eq type 'reuse)
(if (eq (window-buffer window) buffer)
;; WINDOW shows BUFFER already. Update WINDOW's quit-restore
;; parameter, if any.
(let ((quit-restore (window-parameter window 'quit-restore)))
(when (consp quit-restore)
(setcar quit-restore 'same)
;; The selected-window might have changed in
;; between (Bug#20353).
(unless (or (eq window (selected-window))
(eq window (nth 2 quit-restore)))
(setcar (cddr quit-restore) (selected-window)))))
;; WINDOW shows another buffer.
(with-current-buffer (window-buffer window)
(set-window-parameter
window 'quit-restore
(list 'other
;; A quadruple of WINDOW's buffer, start, point and height.
(list (current-buffer) (window-start window)
;; Preserve window-point-insertion-type (Bug#12855).
(copy-marker
(window-point window) window-point-insertion-type)
(if (window-combined-p window)
(window-total-height window)
(window-total-width window)))
(selected-window) buffer)))))
((eq type 'window)
;; WINDOW has been created on an existing frame.
(set-window-parameter
window 'quit-restore
(list 'window 'window (selected-window) buffer)))
((eq type 'frame)
;; WINDOW has been created on a new frame.
(set-window-parameter
window 'quit-restore
(list 'frame 'frame (selected-window) buffer)))
((eq type 'tab)
;; WINDOW has been created on a new tab.
(set-window-parameter
window 'quit-restore
(list 'tab 'tab (selected-window) buffer)))))
(defcustom display-buffer-function nil
"If non-nil, function to call to handle `display-buffer'.
It will receive two args, the buffer and a flag which if non-nil
means that the currently selected window is not acceptable. It
should choose or create a window, display the specified buffer in
it, and return the window.
The specified function should call `display-buffer-record-window'
with corresponding arguments to set up the quit-restore parameter
of the window used."
:type '(choice
(const nil)
(function :tag "function"))
:group 'windows)
(make-obsolete-variable 'display-buffer-function
'display-buffer-alist "24.3")
(defcustom pop-up-frame-alist nil
"Alist of parameters for automatically generated new frames.
If non-nil, the value you specify here is used by the default
`pop-up-frame-function' for the creation of new frames.
Since `pop-up-frame-function' is used by `display-buffer' for
making new frames, any value specified here by default affects
the automatic generation of new frames via `display-buffer' and
all functions based on it. The behavior of `make-frame' is not
affected by this variable.
This option is provided for backward compatibility only. New
code should use a `pop-up-frame-parameters' action alist entry in
`display-buffer-alist' instead. See Info node `(elisp) Choosing
Window Options' in the Emacs Lisp manual."
:type '(repeat (cons :format "%v"
(symbol :tag "Parameter")
(sexp :tag "Value")))
:group 'frames)
(defcustom pop-up-frame-function
(lambda () (make-frame pop-up-frame-alist))
"Function used by `display-buffer' for creating a new frame.
This function is called with no arguments and should return a new
frame. The default value calls `make-frame' with the argument
`pop-up-frame-alist'."
:type 'function
:group 'frames)
(defcustom special-display-buffer-names nil
"List of names of buffers that should be displayed specially.
Displaying a buffer with `display-buffer' or `pop-to-buffer', if
its name is in this list, displays the buffer in a way specified
by `special-display-function'. `special-display-popup-frame'
\(the default for `special-display-function') usually displays
the buffer in a separate frame made with the parameters specified
by `special-display-frame-alist'. If `special-display-function'
has been set to some other function, that function is called with
the buffer as first, and nil as second argument.
Alternatively, an element of this list can be specified as
\(BUFFER-NAME FRAME-PARAMETERS), where BUFFER-NAME is a buffer
name and FRAME-PARAMETERS an alist of (PARAMETER . VALUE) pairs.
`special-display-popup-frame' will interpret such pairs as frame
parameters when it creates a special frame, overriding the
corresponding values from `special-display-frame-alist'.
As a special case, if FRAME-PARAMETERS contains (same-window . t)
`special-display-popup-frame' displays that buffer in the
selected window. If FRAME-PARAMETERS contains (same-frame . t),
it displays that buffer in a window on the selected frame.
If `special-display-function' specifies some other function than
`special-display-popup-frame', that function is called with the
buffer named BUFFER-NAME as first, and FRAME-PARAMETERS as second
argument.
Finally, an element of this list can be also specified as
\(BUFFER-NAME FUNCTION OTHER-ARGS). In that case,
`special-display-popup-frame' will call FUNCTION with the buffer
named BUFFER-NAME as first argument, and OTHER-ARGS as the
second.
Any alternative function specified here is responsible for
setting up the quit-restore parameter of the window used.
If this variable appears \"not to work\", because you added a
name to it but the corresponding buffer is displayed in the
selected window, look at the values of `same-window-buffer-names'
and `same-window-regexps'. Those variables take precedence over
this one.
See also `special-display-regexps'."
:type '(repeat
(choice :tag "Buffer"
:value ""
(string :format "%v")
(cons :tag "With parameters"
:format "%v"
:value ("" . nil)
(string :format "%v")
(repeat :tag "Parameters"
(cons :format "%v"
(symbol :tag "Parameter")
(sexp :tag "Value"))))
(list :tag "With function"
:format "%v"
:value ("" . nil)
(string :format "%v")
(function :tag "Function")
(repeat :tag "Arguments" (sexp)))))
:group 'windows
:group 'frames)
(make-obsolete-variable 'special-display-buffer-names 'display-buffer-alist "24.3")
(put 'special-display-buffer-names 'risky-local-variable t)
(defcustom special-display-regexps nil
"List of regexps saying which buffers should be displayed specially.
Displaying a buffer with `display-buffer' or `pop-to-buffer', if
any regexp in this list matches its name, displays it specially
using `special-display-function'. `special-display-popup-frame'
\(the default for `special-display-function') usually displays
the buffer in a separate frame made with the parameters specified
by `special-display-frame-alist'. If `special-display-function'
has been set to some other function, that function is called with
the buffer as first, and nil as second argument.
Alternatively, an element of this list can be specified as
\(REGEXP FRAME-PARAMETERS), where REGEXP is a regexp as above and
FRAME-PARAMETERS an alist of (PARAMETER . VALUE) pairs.
`special-display-popup-frame' will then interpret these pairs as
frame parameters when creating a special frame for a buffer whose
name matches REGEXP, overriding the corresponding values from
`special-display-frame-alist'.
As a special case, if FRAME-PARAMETERS contains (same-window . t)
`special-display-popup-frame' displays buffers matching REGEXP in
the selected window. (same-frame . t) in FRAME-PARAMETERS means
to display such buffers in a window on the selected frame.
If `special-display-function' specifies some other function than
`special-display-popup-frame', that function is called with the
buffer whose name matched REGEXP as first, and FRAME-PARAMETERS
as second argument.
Finally, an element of this list can be also specified as
\(REGEXP FUNCTION OTHER-ARGS). `special-display-popup-frame'
will then call FUNCTION with the buffer whose name matched
REGEXP as first, and OTHER-ARGS as second argument.
Any alternative function specified here is responsible for
setting up the quit-restore parameter of the window used.
If this variable appears \"not to work\", because you added a
name to it but the corresponding buffer is displayed in the
selected window, look at the values of `same-window-buffer-names'
and `same-window-regexps'. Those variables take precedence over
this one.
See also `special-display-buffer-names'."
:type '(repeat
(choice :tag "Buffer"
:value ""
(regexp :format "%v")
(cons :tag "With parameters"
:format "%v"
:value ("" . nil)
(regexp :format "%v")
(repeat :tag "Parameters"
(cons :format "%v"
(symbol :tag "Parameter")
(sexp :tag "Value"))))
(list :tag "With function"
:format "%v"
:value ("" . nil)
(regexp :format "%v")
(function :tag "Function")
(repeat :tag "Arguments" (sexp)))))
:group 'windows
:group 'frames)
(make-obsolete-variable 'special-display-regexps 'display-buffer-alist "24.3")
(put 'special-display-regexps 'risky-local-variable t)
(defun special-display-p (buffer-name)
"Return non-nil if a buffer named BUFFER-NAME gets a special frame.
More precisely, return t if `special-display-buffer-names' or
`special-display-regexps' contain a string entry equaling or
matching BUFFER-NAME. If `special-display-buffer-names' or
`special-display-regexps' contain a list entry whose car equals
or matches BUFFER-NAME, the return value is the cdr of that
entry."
(let (tmp)
(cond
((member buffer-name special-display-buffer-names)
t)
((setq tmp (assoc buffer-name special-display-buffer-names))
(cdr tmp))
((catch 'found
(dolist (regexp special-display-regexps)
(cond
((stringp regexp)
(when (string-match-p regexp buffer-name)
(throw 'found t)))
((and (consp regexp) (stringp (car regexp))
(string-match-p (car regexp) buffer-name))
(throw 'found (cdr regexp))))))))))
(defcustom special-display-frame-alist
'((height . 14) (width . 80) (unsplittable . t))
"Alist of parameters for special frames.
Special frames are used for buffers whose names are listed in
`special-display-buffer-names' and for buffers whose names match
one of the regular expressions in `special-display-regexps'.
This variable can be set in your init file, like this:
(setq special-display-frame-alist \\='((width . 80) (height . 20)))
These supersede the values given in `default-frame-alist'."
:type '(repeat (cons :format "%v"
(symbol :tag "Parameter")
(sexp :tag "Value")))
:group 'frames)
(make-obsolete-variable 'special-display-frame-alist 'display-buffer-alist "24.3")
(defun special-display-popup-frame (buffer &optional args)
"Pop up a frame displaying BUFFER and return its window.
If BUFFER is already displayed in a visible or iconified frame,
raise that frame. Otherwise, display BUFFER in a new frame.
Optional argument ARGS is a list specifying additional
information.
If ARGS is an alist, use it as a list of frame parameters. If
these parameters contain (same-window . t), display BUFFER in
the selected window. If they contain (same-frame . t), display
BUFFER in a window of the selected frame.
If ARGS is a list whose car is a symbol, use (car ARGS) as a
function to do the work. Pass it BUFFER as first argument, and
pass the elements of (cdr ARGS) as the remaining arguments."
(if (and args (symbolp (car args)))
(apply (car args) buffer (cdr args))
(let ((window (get-buffer-window buffer 0)))
(or
;; If we have a window already, make it visible.
(when window
(let ((frame (window-frame window)))
(make-frame-visible frame)
(raise-frame frame)
(display-buffer-record-window 'reuse window buffer)
window))
;; Reuse the current window if the user requested it.
(when (cdr (assq 'same-window args))
(condition-case nil
(progn (switch-to-buffer buffer nil t) (selected-window))
(error nil)))
;; Stay on the same frame if requested.
(when (or (cdr (assq 'same-frame args)) (cdr (assq 'same-window args)))
(let* ((pop-up-windows t)
pop-up-frames
special-display-buffer-names special-display-regexps)
(display-buffer buffer)))
;; If no window yet, make one in a new frame.
(let* ((frame
(with-current-buffer buffer
(make-frame (append args special-display-frame-alist))))
(window (frame-selected-window frame)))
(display-buffer-record-window 'frame window buffer)
(unless (eq buffer (window-buffer window))
(set-window-buffer window buffer)
(set-window-prev-buffers window nil))
(set-window-dedicated-p window t)
window)))))
(defcustom special-display-function 'special-display-popup-frame
"Function to call for displaying special buffers.
This function is called with two arguments - the buffer and,
optionally, a list - and should return a window displaying that
buffer. The default value usually makes a separate frame for the
buffer using `special-display-frame-alist' to specify the frame
parameters. See the definition of `special-display-popup-frame'
for how to specify such a function.
A buffer is special when its name is either listed in
`special-display-buffer-names' or matches a regexp in
`special-display-regexps'.
The specified function should call `display-buffer-record-window'
with corresponding arguments to set up the quit-restore parameter
of the window used."
:type 'function
:group 'frames)
(make-obsolete-variable 'special-display-function 'display-buffer-alist "24.3")
(defcustom same-window-buffer-names nil
"List of names of buffers that should appear in the \"same\" window.
`display-buffer' and `pop-to-buffer' show a buffer whose name is
on this list in the selected rather than some other window.
An element of this list can be a cons cell instead of just a
string. In that case, the cell's car must be a string specifying
the buffer name. This is for compatibility with
`special-display-buffer-names'; the cdr of the cons cell is
ignored.
This variable is provided for backward compatibility only and
should not be used in new code. Customize `display-buffer-alist'
instead. See Info node `(elisp) Choosing Window Options' in the
Emacs Lisp manual for an example.
See also `same-window-regexps'."
:type '(repeat (string :format "%v"))
:group 'windows)
(defcustom same-window-regexps nil
"List of regexps saying which buffers should appear in the \"same\" window.
`display-buffer' and `pop-to-buffer' show a buffer whose name
matches a regexp on this list in the selected rather than some
other window.
An element of this list can be a cons cell instead of just a
string. In that case, the cell's car must be a regexp matching
the buffer name. This is for compatibility with
`special-display-regexps'; the cdr of the cons cell is ignored.
This variable is provided for backward compatibility only and
should not be used in new code. Customize `display-buffer-alist'
instead. See Info node `(elisp) Choosing Window Options' in the
Emacs Lisp manual for an example.
See also `same-window-buffer-names'."
:type '(repeat (regexp :format "%v"))
:group 'windows)
(defun same-window-p (buffer-name)
"Return non-nil if buffer BUFFER-NAME would be shown in the \"same\" window.
This function returns non-nil if `display-buffer' or
`pop-to-buffer' would show a buffer named BUFFER-NAME in the
selected rather than (as usual) some other window. See
`same-window-buffer-names' and `same-window-regexps'."
(cond
((not (stringp buffer-name)))
;; The elements of `same-window-buffer-names' can be buffer
;; names or cons cells whose cars are buffer names.
((member buffer-name same-window-buffer-names))
((assoc buffer-name same-window-buffer-names))
((catch 'found
(dolist (regexp same-window-regexps)
;; The elements of `same-window-regexps' can be regexps
;; or cons cells whose cars are regexps.
(when (or (and (stringp regexp)
(string-match-p regexp buffer-name))
(and (consp regexp) (stringp (car regexp))
(string-match-p (car regexp) buffer-name)))
(throw 'found t)))))))
(defcustom pop-up-frames nil
"Whether `display-buffer' should make a separate frame.
If nil, never make a separate frame.
If the value is `graphic-only', make a separate frame
on graphic displays only.
Any other non-nil value means always make a separate frame.
This variable is provided mainly for backward compatibility and
should not be used in new code. To make `display-buffer' behave
as if this were t, customize `display-buffer-base-action'
instead. See Info node `(elisp) Choosing Window Options' in the
Emacs Lisp manual for an example."
:type '(choice
(const :tag "Never" nil)
(const :tag "On graphic displays only" graphic-only)
(const :tag "Always" t))
:group 'windows)
(defcustom display-buffer-reuse-frames nil
"Non-nil means `display-buffer' should reuse frames.
If the buffer in question is already displayed in a frame, raise
that frame."
:type 'boolean
:version "21.1"
:group 'windows)
(make-obsolete-variable
'display-buffer-reuse-frames
"use a `reusable-frames' alist entry in `display-buffer-alist'."
"24.3")
(defcustom pop-up-windows t
"Non-nil means `display-buffer' should make a new window.
This variable is provided mainly for backward compatibility and
should not be used in new code. To make `display-buffer' behave
as if this were t, customize `display-buffer-base-action'
instead. See Info node `(elisp) Choosing Window Options' in the
Emacs Lisp manual for an example."
:type 'boolean
:group 'windows)
(defcustom split-window-preferred-function 'split-window-sensibly
"Function called by `display-buffer' routines to split a window.
This function is called with a window as single argument and is
supposed to split that window and return the new window. If the
window can (or shall) not be split, it is supposed to return nil.
The default is to call the function `split-window-sensibly' which
tries to split the window in a way which seems most suitable.
You can customize the options `split-height-threshold' and/or
`split-width-threshold' in order to have `split-window-sensibly'
prefer either vertical or horizontal splitting.
If you set this to any other function, bear in mind that the
`display-buffer' routines may call this function two times. The
argument of the first call is the largest window on its frame.
If that call fails to return a live window, the function is
called again with the least recently used window as argument. If
that call fails too, `display-buffer' will use an existing window
to display its buffer.
The window selected at the time `display-buffer' was invoked is
still selected when this function is called. Hence you can
compare the window argument with the value of `selected-window'
if you intend to split the selected window instead or if you do
not want to split the selected window."
:type 'function
:version "23.1"
:group 'windows)
(defcustom split-height-threshold 80
"Minimum height for splitting windows sensibly.
If this is an integer, `split-window-sensibly' may split a window
vertically only if it has at least this many lines. If this is
nil, `split-window-sensibly' is not allowed to split a window
vertically. If, however, a window is the only window on its
frame, or all the other ones are dedicated,
`split-window-sensibly' may split it vertically disregarding the
value of this variable."
:type '(choice (const nil) (integer :tag "lines"))
:version "23.1"
:group 'windows)
(defcustom split-width-threshold 160
"Minimum width for splitting windows sensibly.
If this is an integer, `split-window-sensibly' may split a window
horizontally only if it has at least this many columns. If this
is nil, `split-window-sensibly' is not allowed to split a window
horizontally."
:type '(choice (const nil) (integer :tag "columns"))
:version "23.1"
:group 'windows)
(defun window-splittable-p (window &optional horizontal)
"Return non-nil if `split-window-sensibly' may split WINDOW.
Optional argument HORIZONTAL nil or omitted means check whether
`split-window-sensibly' may split WINDOW vertically. HORIZONTAL
non-nil means check whether WINDOW may be split horizontally.
WINDOW may be split vertically when the following conditions
hold:
- `window-size-fixed' is either nil or equals `width' for the
buffer of WINDOW.
- `split-height-threshold' is an integer and WINDOW is at least as
high as `split-height-threshold'.
- When WINDOW is split evenly, the emanating windows are at least
`window-min-height' lines tall and can accommodate at least one
line plus - if WINDOW has one - a mode line.
WINDOW may be split horizontally when the following conditions
hold:
- `window-size-fixed' is either nil or equals `height' for the
buffer of WINDOW.
- `split-width-threshold' is an integer and WINDOW is at least as
wide as `split-width-threshold'.
- When WINDOW is split evenly, the emanating windows are at least
`window-min-width' or two (whichever is larger) columns wide."
(when (and (window-live-p window)
(not (window-parameter window 'window-side)))
(with-current-buffer (window-buffer window)
(if horizontal
;; A window can be split horizontally when its width is not
;; fixed, it is at least `split-width-threshold' columns wide
;; and at least twice as wide as `window-min-width' and 2 (the
;; latter value is hardcoded).
(and (memq window-size-fixed '(nil height))
;; Testing `window-full-width-p' here hardly makes any
;; sense nowadays. This can be done more intuitively by
;; setting up `split-width-threshold' appropriately.
(numberp split-width-threshold)
(>= (window-width window)
(max split-width-threshold
(* 2 (max window-min-width 2)))))
;; A window can be split vertically when its height is not
;; fixed, it is at least `split-height-threshold' lines high,
;; and it is at least twice as high as `window-min-height' and 2
;; if it has a mode line or 1.
(and (memq window-size-fixed '(nil width))
(numberp split-height-threshold)
(>= (window-height window)
(max split-height-threshold
(* 2 (max window-min-height
(if mode-line-format 2 1))))))))))
(defun split-window-sensibly (&optional window)
"Split WINDOW in a way suitable for `display-buffer'.
WINDOW defaults to the currently selected window.
If `split-height-threshold' specifies an integer, WINDOW is at
least `split-height-threshold' lines tall and can be split
vertically, split WINDOW into two windows one above the other and
return the lower window. Otherwise, if `split-width-threshold'
specifies an integer, WINDOW is at least `split-width-threshold'
columns wide and can be split horizontally, split WINDOW into two
windows side by side and return the window on the right. If this
can't be done either and WINDOW is the only window on its frame,
try to split WINDOW vertically disregarding any value specified
by `split-height-threshold'. If that succeeds, return the lower
window. Return nil otherwise.
By default `display-buffer' routines call this function to split
the largest or least recently used window. To change the default
customize the option `split-window-preferred-function'.
You can enforce this function to not split WINDOW horizontally,
by setting (or binding) the variable `split-width-threshold' to
nil. If, in addition, you set `split-height-threshold' to zero,
chances increase that this function does split WINDOW vertically.
In order to not split WINDOW vertically, set (or bind) the
variable `split-height-threshold' to nil. Additionally, you can
set `split-width-threshold' to zero to make a horizontal split
more likely to occur.
Have a look at the function `window-splittable-p' if you want to
know how `split-window-sensibly' determines whether WINDOW can be
split."
(let ((window (or window (selected-window))))
(or (and (window-splittable-p window)
;; Split window vertically.
(with-selected-window window
(split-window-below)))
(and (window-splittable-p window t)
;; Split window horizontally.
(with-selected-window window
(split-window-right)))
(and
;; If WINDOW is the only usable window on its frame (it is
;; the only one or, not being the only one, all the other
;; ones are dedicated) and is not the minibuffer window, try
;; to split it vertically disregarding the value of
;; `split-height-threshold'.
(let ((frame (window-frame window)))
(or
(eq window (frame-root-window frame))
(catch 'done
(walk-window-tree (lambda (w)
(unless (or (eq w window)
(window-dedicated-p w))
(throw 'done nil)))
frame nil 'nomini)
t)))
(not (window-minibuffer-p window))
(let ((split-height-threshold 0))
(when (window-splittable-p window)
(with-selected-window window
(split-window-below))))))))
(defun window--try-to-split-window (window &optional alist)
"Try to split WINDOW.
Return value returned by `split-window-preferred-function' if it
represents a live window, nil otherwise."
(and (window-live-p window)
(not (frame-parameter (window-frame window) 'unsplittable))
(let* ((window-combination-limit
;; When `window-combination-limit' equals
;; `display-buffer' or equals `resize-window' and a
;; `window-height' or `window-width' alist entry are
;; present, bind it to t so resizing steals space
;; preferably from the window that was split.
(if (or (eq window-combination-limit 'display-buffer)
(and (eq window-combination-limit 'window-size)
(or (cdr (assq 'window-height alist))
(cdr (assq 'window-width alist)))))
t
window-combination-limit))
(new-window
;; Since `split-window-preferred-function' might
;; throw an error use `condition-case'.
(condition-case nil
(funcall split-window-preferred-function window)
(error nil))))
(and (window-live-p new-window) new-window))))
(defun window--frame-usable-p (frame)
"Return FRAME if it can be used to display a buffer."
(when (frame-live-p frame)
(let ((window (frame-root-window frame)))
;; `frame-root-window' may be an internal window which is considered
;; "dead" by `window-live-p'. Hence if `window' is not live we
;; implicitly know that `frame' has a visible window we can use.
(unless (and (window-live-p window)
(or (window-minibuffer-p window)
;; If the window is soft-dedicated, the frame is usable.
;; Actually, even if the window is really dedicated,
;; the frame is still usable by splitting it.
;; At least Emacs-22 allowed it, and it is desirable
;; when displaying same-frame windows.
nil ; (eq t (window-dedicated-p window))
))
frame))))
(defvaralias 'even-window-heights 'even-window-sizes)
(defcustom even-window-sizes t
"If non-nil `display-buffer' will try to even window sizes.
Otherwise `display-buffer' will leave the window configuration
alone. Special values are `height-only' to even heights only and
`width-only' to even widths only. Any other value means to even
any of them."
:type '(choice
(const :tag "Never" nil)
(const :tag "Side-by-side windows only" width-only)
(const :tag "Windows above or below only" height-only)
(const :tag "Always" t))
:version "25.1"
:group 'windows)
(defun window--even-window-sizes (window)
"Even sizes of WINDOW and selected window.
Even only if these windows are the only children of their parent,
`even-window-sizes' has the appropriate value and the selected
window is larger than WINDOW."
(when (and (= (window-child-count (window-parent window)) 2)
(eq (window-parent) (window-parent window)))
(cond
((and (not (memq even-window-sizes '(nil height-only)))
(window-combined-p window t)
(> (window-total-width) (window-total-width window)))
(condition-case nil
(enlarge-window
(/ (- (window-total-width window) (window-total-width)) 2) t)
(error nil)))
((and (not (memq even-window-sizes '(nil width-only)))
(window-combined-p window)
(> (window-total-height) (window-total-height window)))
(condition-case nil
(enlarge-window
(/ (- (window-total-height window) (window-total-height)) 2))
(error nil))))))
(defun window--display-buffer (buffer window type &optional alist)
"Display BUFFER in WINDOW.
WINDOW must be a live window chosen by a buffer display action
function for showing BUFFER. TYPE tells whether WINDOW existed
already before that action function was called or is a new window
created by that function. ALIST is a buffer display action alist
as compiled by `display-buffer'.
TYPE must be one of the following symbols: `reuse' (which means
WINDOW existed before the call of `display-buffer' and may
already show BUFFER or not), `window' (WINDOW was created on an
existing frame) or `frame' (WINDOW was created on a new frame).
TYPE is passed unaltered to `display-buffer-record-window'.
Handle WINDOW's dedicated flag as follows: If WINDOW already
shows BUFFER, leave it alone. Otherwise, if ALIST contains a
`dedicated' entry and WINDOW is either new or that entry's value
equals `side', set WINDOW's dedicated flag to the value of that
entry. Otherwise, if WINDOW is new and the value of
`display-buffer-mark-dedicated' is non-nil, set WINDOW's
dedicated flag to that value. In any other case, reset WINDOW's
dedicated flag to nil.
Return WINDOW if BUFFER and WINDOW are live."
(when (and (buffer-live-p buffer) (window-live-p window))
(display-buffer-record-window type window buffer)
(unless (eq buffer (window-buffer window))
;; Unless WINDOW already shows BUFFER reset its dedicated flag.
(set-window-dedicated-p window nil)
(set-window-buffer window buffer))
(let ((alist-dedicated (assq 'dedicated alist)))
;; Maybe dedicate WINDOW to BUFFER if asked for.
(cond
;; Don't dedicate WINDOW if it is dedicated because it shows
;; BUFFER already or it is reused and is not a side window.
((or (window-dedicated-p window)
(and (eq type 'reuse) (not (eq (cdr alist-dedicated) 'side)))))
;; Otherwise, if ALIST contains a 'dedicated' entry, use that
;; entry's value (which may be nil).
(alist-dedicated
(set-window-dedicated-p window (cdr alist-dedicated)))
;; Otherwise, if 'display-buffer-mark-dedicated' is non-nil,
;; use that.
(display-buffer-mark-dedicated
(set-window-dedicated-p window display-buffer-mark-dedicated))))
(when (memq type '(window frame tab))
(set-window-prev-buffers window nil))
(when (functionp (cdr (assq 'body-function alist)))
(let ((inhibit-read-only t)
(inhibit-modification-hooks t))
(funcall (cdr (assq 'body-function alist)) window)))
(let ((quit-restore (window-parameter window 'quit-restore))
(height (cdr (assq 'window-height alist)))
(width (cdr (assq 'window-width alist)))
(size (cdr (assq 'window-size alist)))
(preserve-size (cdr (assq 'preserve-size alist))))
(cond
((or (eq type 'frame)
(and (eq (car quit-restore) 'same)
(eq (nth 1 quit-restore) 'frame)))
;; A window that never showed another buffer but BUFFER ever
;; since it was created on a new frame.
;;
;; Adjust size of frame if asked for. We probably should do
;; that only for a single window frame.
(cond
((not size))
((consp size)
(let ((width (car size))
(height (cdr size))
(frame (window-frame window)))
(when (and (numberp width) (numberp height))
(set-frame-height
frame (+ (frame-height frame)
(- height (window-total-height window))))
(set-frame-width
frame (+ (frame-width frame)
(- width (window-total-width window)))))))
((functionp size)
(ignore-errors (funcall size window)))))
((or (eq type 'window)
(and (eq (car quit-restore) 'same)
(eq (nth 1 quit-restore) 'window)))
;; A window that never showed another buffer but BUFFER ever
;; since it was created on an existing frame.
;;
;; Adjust width and/or height of window if asked for.
(cond
((not height))
((numberp height)
(let* ((new-height
(if (integerp height)
height
(round
(* (window-total-height (frame-root-window window))
height))))
(delta (- new-height (window-total-height window))))
(when (and (window--resizable-p window delta nil 'safe)
(window-combined-p window))
(window-resize window delta nil 'safe))))
((functionp height)
(ignore-errors (funcall height window))))
;; Adjust width of window if asked for.
(cond
((not width))
((numberp width)
(let* ((new-width
(if (integerp width)
width
(round
(* (window-total-width (frame-root-window window))
width))))
(delta (- new-width (window-total-width window))))
(when (and (window--resizable-p window delta t 'safe)
(window-combined-p window t))
(window-resize window delta t 'safe))))
((functionp width)
(ignore-errors (funcall width window))))
;; Preserve window size if asked for.
(when (consp preserve-size)
(window-preserve-size window t (car preserve-size))
(window-preserve-size window nil (cdr preserve-size)))))
;; Assign any window parameters specified.
(let ((parameters (cdr (assq 'window-parameters alist))))
(dolist (parameter parameters)
(set-window-parameter
window (car parameter) (cdr parameter)))))
window))
(defun window--maybe-raise-frame (frame)
(make-frame-visible frame)
(unless (or (frame-parameter frame 'no-focus-on-map)
;; Don't raise frames that should not get focus.
(frame-parameter frame 'no-accept-focus)
;; Assume the selected frame is already visible enough.
(eq frame (selected-frame))
;; Assume the frame from which we invoked the
;; minibuffer is visible.
(and (minibuffer-window-active-p (selected-window))
(eq frame (window-frame (minibuffer-selected-window)))))
(raise-frame frame)))
;; FIXME: Not implemented.
;; FIXME: By the way, there could be more levels of dedication:
;; - `barely' dedicated doesn't prevent reuse of the window, only records that
;; the window hasn't been used for something else yet.
;; - `soft' (`softly') dedicated only allows reuse when asked explicitly.
;; - `strongly' never allows reuse.
(defvar display-buffer-mark-dedicated nil
"If non-nil, `display-buffer' marks the windows it creates as dedicated.
The actual non-nil value of this variable will be copied to the
`window-dedicated-p' flag.")
(defconst display-buffer--action-function-custom-type
'(choice :tag "Function"
(const :tag "--" ignore) ; default for insertion
(const display-buffer-reuse-window)
(const display-buffer-pop-up-window)
(const display-buffer-same-window)
(const display-buffer-pop-up-frame)
(const display-buffer-in-child-frame)
(const display-buffer-below-selected)
(const display-buffer-at-bottom)
(const display-buffer-in-previous-window)
(const display-buffer-use-least-recent-window)
(const display-buffer-use-some-window)
(const display-buffer-use-some-frame)
(function :tag "Other function"))
"Custom type for `display-buffer' action functions.")
(defconst display-buffer--action-custom-type
`(cons :tag "Action"
(choice :tag "Action functions"
,display-buffer--action-function-custom-type
(repeat
:tag "List of functions"
,display-buffer--action-function-custom-type))
(alist :tag "Action arguments"
:key-type symbol
:value-type (sexp :tag "Value")))
"Custom type for `display-buffer' actions.")
(defvar display-buffer-overriding-action '(nil . nil)
"Overriding action for buffer display.
This action overrides all the other actions in the action
variables and arguments passed to `display-buffer'. The value
should be a cons cell (FUNCTIONS . ALIST), where FUNCTIONS is a
function or a list of functions. Each function should accept two
arguments: a buffer to display and an alist similar to ALIST.
See `display-buffer' for details.
This variable is not intended for user customization. Lisp
programs should never set this variable permanently but may bind
it around calls of buffer display functions like `display-buffer'
or `pop-to-buffer'. Since such a binding will affect any nested
buffer display requests, this variable should be used with utmost
care.")
(put 'display-buffer-overriding-action 'risky-local-variable t)
(defcustom display-buffer-alist nil
"Alist of user-defined conditional actions for `display-buffer'.
Its value takes effect before processing the ACTION argument of
`display-buffer' and before `display-buffer-base-action' and
`display-buffer-fallback-action', but after
`display-buffer-overriding-action', which see.
If non-nil, this is an alist of elements (CONDITION . ACTION),
where:
CONDITION is either a regexp matching buffer names, or a
function that takes two arguments - a buffer name and the
ACTION argument of `display-buffer' - and returns a boolean.
ACTION is a cons cell (FUNCTIONS . ALIST), where FUNCTIONS is an
action function or a list of action functions and ALIST is an
action alist. Each such action function should accept two
arguments: a buffer to display and an alist of the same form as
ALIST. See `display-buffer' for details.
`display-buffer' scans this alist until it either finds a
matching regular expression or the function specified by a
condition returns non-nil. In any of these cases, it adds the
associated action to the list of actions it will try."
:type `(alist :key-type
(choice :tag "Condition"
regexp
(function :tag "Matcher function"))
:value-type ,display-buffer--action-custom-type)
:risky t
:version "24.1"
:group 'windows)
(defcustom display-buffer-base-action '(nil . nil)
"User-specified default action for `display-buffer'.
This is the default action used by `display-buffer' if no other
actions are specified or all fail, before falling back on
`display-buffer-fallback-action'.
It should be a cons cell (FUNCTIONS . ALIST), where FUNCTIONS is
an action function or a list of action functions and ALIST is an
action alist. Each such action function should accept two
arguments: a buffer to display and an alist of the same form as
ALIST. See `display-buffer' for details."
:type display-buffer--action-custom-type
:risky t
:version "24.1"
:group 'windows)
(defconst display-buffer-fallback-action
'((display-buffer--maybe-same-window ;FIXME: why isn't this redundant?
display-buffer-reuse-window
display-buffer--maybe-pop-up-frame-or-window
display-buffer-in-previous-window
display-buffer-use-some-window
;; If all else fails, pop up a new frame.
display-buffer-pop-up-frame))
"Default fallback action for `display-buffer'.
This is the action used by `display-buffer' if no other actions
have been specified, for example, by the user options
`display-buffer-alist' or `display-buffer-base-action', or they
all fail. It should never be set by programs or users. See
`display-buffer'.")
(put 'display-buffer-fallback-action 'risky-local-variable t)
(defun display-buffer-assq-regexp (buffer-name alist action)
"Retrieve ALIST entry corresponding to BUFFER-NAME.
This returns the cdr of the alist entry ALIST if either its key
is a string that matches BUFFER-NAME, as reported by
`string-match-p'; or if the key is a function that returns
non-nil when called with three arguments: the ALIST key,
BUFFER-NAME and ACTION. ACTION should have the form of the
action argument passed to `display-buffer'."
(catch 'match
(dolist (entry alist)
(let ((key (car entry)))
(when (or (and (stringp key)
(string-match-p key buffer-name))
(and (functionp key)
(funcall key buffer-name action)))
(throw 'match (cdr entry)))))))
(defvar display-buffer--same-window-action
'(display-buffer-same-window
(inhibit-same-window . nil))
"A `display-buffer' action for displaying in the same window.
Specifies to call `display-buffer-same-window'.")
(put 'display-buffer--same-window-action 'risky-local-variable t)
(defvar display-buffer--other-frame-action
'((display-buffer-reuse-window
display-buffer-pop-up-frame)
(reusable-frames . 0)
(inhibit-same-window . t))
"A `display-buffer' action for displaying in another frame.
Specifies to call `display-buffer-reuse-window', and if that
fails, call `display-buffer-pop-up-frame'.")
(put 'display-buffer--other-frame-action 'risky-local-variable t)
(defun display-buffer (buffer-or-name &optional action frame)
"Display BUFFER-OR-NAME in some window, without selecting it.
To change which window is used, set `display-buffer-alist'
to an expression containing one of these \"action\" functions:
`display-buffer-same-window' -- Use the selected window.
`display-buffer-reuse-window' -- Use a window already showing
the buffer.
`display-buffer-in-previous-window' -- Use a window that did
show the buffer before.
`display-buffer-use-some-window' -- Use some existing window.
`display-buffer-use-least-recent-window' -- Try to avoid re-using
windows that have recently been switched to.
`display-buffer-pop-up-window' -- Pop up a new window.
`display-buffer-below-selected' -- Use or pop up a window below
the selected one.
`display-buffer-at-bottom' -- Use or pop up a window at the
bottom of the selected frame.
`display-buffer-pop-up-frame' -- Show the buffer on a new frame.
`display-buffer-in-child-frame' -- Show the buffer in a
child frame.
`display-buffer-no-window' -- Do not display the buffer and
have `display-buffer' return nil immediately.
For instance:
(setq display-buffer-alist '((\".*\" display-buffer-at-bottom)))
Buffer display can be further customized to a very high degree;
the rest of this docstring explains some of the many
possibilities, and also see Info node `(emacs)Window Choice' for
more information.
BUFFER-OR-NAME must be a buffer or a string naming a live buffer.
Return the window chosen for displaying that buffer, or nil if no
such window is found.
Optional argument ACTION, if non-nil, should specify a buffer
display action of the form (FUNCTIONS . ALIST). FUNCTIONS is
either an \"action function\" or a possibly empty list of action
functions. ALIST is a possibly empty \"action alist\".
An action function is a function that accepts two arguments: the
buffer to display and an action alist. Based on those arguments,
it should try to display the buffer in a window and return that
window. An action alist is an association list mapping symbols
to values. Action functions use the action alist passed to them
to fine-tune their behaviors.
`display-buffer' builds a list of action functions and an action
alist by combining any action functions and alists specified by
`display-buffer-overriding-action', `display-buffer-alist', the
ACTION argument, `display-buffer-base-action', and
`display-buffer-fallback-action' (in order). Then it calls each
function in the combined function list in turn, passing the
buffer as the first argument and the combined action alist as the
second argument, until one of the functions returns non-nil.
See above for the action functions and the action they try to
perform.
Action alist entries are:
`inhibit-same-window' -- A non-nil value prevents the same
window from being used for display.
`inhibit-switch-frame' -- A non-nil value prevents any frame
used for showing the buffer from being raised or selected.
`reusable-frames' -- The value specifies the set of frames to
search for a window that already displays the buffer.
Possible values are nil (the selected frame), t (any live
frame), visible (any visible frame), 0 (any visible or
iconified frame) or an existing live frame.
`pop-up-frame-parameters' -- The value specifies an alist of
frame parameters to give a new frame, if one is created.
`window-height' -- The value specifies the desired height of the
window chosen and is either an integer (the total height of
the window), a floating point number (the fraction of its
total height with respect to the total height of the frame's
root window) or a function to be called with one argument -
the chosen window. The function is supposed to adjust the
height of the window; its return value is ignored. Suitable
functions are `shrink-window-if-larger-than-buffer' and
`fit-window-to-buffer'.
`window-width' -- The value specifies the desired width of the
window chosen and is either an integer (the total width of
the window), a floating point number (the fraction of its
total width with respect to the width of the frame's root
window) or a function to be called with one argument - the
chosen window. The function is supposed to adjust the width
of the window; its return value is ignored.
`preserve-size' -- The value should be either (t . nil) to
preserve the width of the chosen window, (nil . t) to
preserve its height or (t . t) to preserve its height and
width in future changes of the window configuration.
`window-parameters' -- The value specifies an alist of window
parameters to give the chosen window.
`allow-no-window' -- A non-nil value means that `display-buffer'
may not display the buffer and return nil immediately.
`body-function' -- A function called with one argument - the
displayed window. It is called after the buffer is
displayed, and before `window-height', `window-width'
and `preserve-size' are applied. The function is supposed
to fill the window body with some contents that might depend
on dimensions of the displayed window.
The entries `window-height', `window-width' and `preserve-size'
are applied only when the window used for displaying the buffer
never showed another buffer before.
The ACTION argument can also have a non-nil and non-list value.
This means to display the buffer in a window other than the
selected one, even if it is already displayed in the selected
window. If called interactively with a prefix argument, ACTION
is t. Non-interactive calls should always supply a list or nil.
The optional third argument FRAME, if non-nil, acts like a
\(reusable-frames . FRAME) entry appended to the action alist
specified by the ACTION argument."
(interactive (list (read-buffer "Display buffer: " (other-buffer))
(if current-prefix-arg t)))
(let ((buffer (if (bufferp buffer-or-name)
buffer-or-name
(get-buffer buffer-or-name)))
;; Make sure that when we split windows the old window keeps
;; point, bug#14829.
(split-window-keep-point t)
;; Handle the old form of the first argument.
(inhibit-same-window (and action (not (listp action)))))
(unless (listp action) (setq action nil))
(if display-buffer-function
;; If `display-buffer-function' is defined, let it do the job.
(funcall display-buffer-function buffer inhibit-same-window)
;; Otherwise, use the defined actions.
(let* ((user-action
(display-buffer-assq-regexp
(buffer-name buffer) display-buffer-alist action))
(special-action (display-buffer--special-action buffer))
;; Extra actions from the arguments to this function:
(extra-action
(cons nil (append (if inhibit-same-window
'((inhibit-same-window . t)))
(if frame
`((reusable-frames . ,frame))))))
;; Construct action function list and action alist.
(actions (list display-buffer-overriding-action
user-action special-action action extra-action
display-buffer-base-action
display-buffer-fallback-action))
(functions (apply 'append
(mapcar (lambda (x)
(setq x (car x))
(if (functionp x) (list x) x))
actions)))
(alist (apply 'append (mapcar 'cdr actions)))
window)
(unless (buffer-live-p buffer)
(error "Invalid buffer"))
(while (and functions (not window))
(setq window (funcall (car functions) buffer alist)
functions (cdr functions)))
(and (windowp window) window)))))
(defun display-buffer-other-frame (buffer)
"Display buffer BUFFER preferably in another frame.
This function attempts to look for a window displaying BUFFER,
on all the frames on the current terminal, skipping the selected
window; if that fails, it pops up a new frame.
This uses the function `display-buffer' as a subroutine; see
its documentation for additional customization information."
(interactive "bDisplay buffer in other frame: ")
(display-buffer buffer display-buffer--other-frame-action t))
;;; `display-buffer' action functions:
(defun display-buffer-use-some-frame (buffer alist)
"Display BUFFER in an existing frame that meets a predicate.
The default predicate is to use any frame other than the selected
frame. If successful, return the window used; otherwise return
nil.
ALIST is an association list of action symbols and values. See
Info node `(elisp) Buffer Display Action Alists' for details of
such alists.
If ALIST has a non-nil `inhibit-switch-frame' entry, avoid
raising the frame. If it has a non-nil `frame-predicate' entry,
its value is a function taking one argument (a frame), returning
non-nil if the frame is a candidate; this function replaces the
default predicate. If ALIST has a non-nil `inhibit-same-window'
entry, avoid using the currently selected window (only useful
with a frame-predicate that allows using the selected frame).
This is an action function for buffer display, see Info
node `(elisp) Buffer Display Action Functions'. It should be
called only by `display-buffer' or a function directly or
indirectly called by the latter."
(let* ((predicate
(or (cdr (assq 'frame-predicate alist))
(lambda (frame)
(and (not (eq frame (selected-frame)))
(get-lru-window frame)))))
(frame (car (filtered-frame-list predicate)))
(window
(and frame
(get-lru-window
frame nil (cdr (assq 'inhibit-same-window alist))))))
(when window
(prog1
(window--display-buffer buffer window 'reuse alist)
(unless (cdr (assq 'inhibit-switch-frame alist))
(window--maybe-raise-frame frame))))))
(defun display-buffer-same-window (buffer alist)
"Display BUFFER in the selected window.
ALIST is an association list of action symbols and values. See
Info node `(elisp) Buffer Display Action Alists' for details of
such alists.
This function fails if ALIST has an `inhibit-same-window'
element whose value is non-nil, or if the selected window is a
minibuffer window or is dedicated to another buffer; in that case,
return nil. Otherwise, return the selected window.
This is an action function for buffer display, see Info
node `(elisp) Buffer Display Action Functions'. It should be
called only by `display-buffer' or a function directly or
indirectly called by the latter."
(unless (or (cdr (assq 'inhibit-same-window alist))
(window-minibuffer-p)
(window-dedicated-p))
(window--display-buffer buffer (selected-window) 'reuse alist)))
(defun display-buffer--maybe-same-window (buffer alist)
"Conditionally display BUFFER in the selected window.
ALIST is an association list of action symbols and values. See
Info node `(elisp) Buffer Display Action Alists' for details of
such alists.
If `same-window-p' returns non-nil for BUFFER's name, call
`display-buffer-same-window' and return its value. Otherwise,
return nil."
(and (same-window-p (buffer-name buffer))
(display-buffer-same-window buffer alist)))
(defun display-buffer-reuse-window (buffer alist)
"Return a window that is already displaying BUFFER.
Preferably use a window on the selected frame if such a window
exists. Return nil if no usable window is found.
ALIST is an association list of action symbols and values. See
Info node `(elisp) Buffer Display Action Alists' for details of
such alists.
If ALIST has a non-nil `inhibit-same-window' entry, the selected
window is not eligible for reuse.
If ALIST contains a `reusable-frames' entry, its value determines
which frames to search for a reusable window:
nil -- the selected frame (actually the last non-minibuffer frame)
A frame -- just that frame
`visible' -- all visible frames
0 -- all frames on the current terminal
t -- all frames.
If ALIST contains no `reusable-frames' entry, search just the
selected frame if `display-buffer-reuse-frames' and
`pop-up-frames' are both nil; search all frames on the current
terminal if either of those variables is non-nil.
If ALIST has a non-nil `inhibit-switch-frame' entry, then in the
event that a window on another frame is chosen, avoid raising
that frame.
This is an action function for buffer display, see Info
node `(elisp) Buffer Display Action Functions'. It should be
called only by `display-buffer' or a function directly or
indirectly called by the latter."
(let* ((alist-entry (assq 'reusable-frames alist))
(frames (cond (alist-entry (cdr alist-entry))
((if (eq pop-up-frames 'graphic-only)
(display-graphic-p)
pop-up-frames)
0)
(display-buffer-reuse-frames 0)
(t (last-nonminibuffer-frame))))
(window (if (and (eq buffer (window-buffer))
(not (cdr (assq 'inhibit-same-window alist))))
(selected-window)
;; Preferably use a window on the selected frame,
;; if such a window exists (Bug#36680).
(let* ((windows (delq (selected-window)
(get-buffer-window-list
buffer 'nomini frames)))
(first (car windows))
(this-frame (selected-frame)))
(cond
((eq (window-frame first) this-frame)
first)
((catch 'found
(dolist (next (cdr windows))
(when (eq (window-frame next) this-frame)
(throw 'found next)))))
(t first))))))
(when (window-live-p window)
(prog1 (window--display-buffer buffer window 'reuse alist)
(unless (cdr (assq 'inhibit-switch-frame alist))
(window--maybe-raise-frame (window-frame window)))))))
(defun display-buffer-reuse-mode-window (buffer alist)
"Return a window based on the mode of the buffer it displays.
Display BUFFER in the returned window. Return nil if no usable
window is found.
ALIST is an association list of action symbols and values. See
Info node `(elisp) Buffer Display Action Alists' for details of
such alists.
If ALIST contains a `mode' entry, its value is a major mode (a
symbol) or a list of modes. A window is a candidate if it
displays a buffer that derives from one of the given modes. When
ALIST contains no `mode' entry, the current major mode of BUFFER
is used.
The behavior is also controlled by entries for
`inhibit-same-window', `reusable-frames' and
`inhibit-switch-frame' as is done in the function
`display-buffer-reuse-window'.
This is an action function for buffer display, see Info
node `(elisp) Buffer Display Action Functions'. It should be
called only by `display-buffer' or a function directly or
indirectly called by the latter."
(let* ((alist-entry (assq 'reusable-frames alist))
(alist-mode-entry (assq 'mode alist))
(frames (cond (alist-entry (cdr alist-entry))
((if (eq pop-up-frames 'graphic-only)
(display-graphic-p)
pop-up-frames)
0)
(display-buffer-reuse-frames 0)
(t (last-nonminibuffer-frame))))
(inhibit-same-window-p (cdr (assq 'inhibit-same-window alist)))
(windows (window-list-1 nil 'nomini frames))
(buffer-mode (with-current-buffer buffer major-mode))
(allowed-modes (if alist-mode-entry
(cdr alist-mode-entry)
buffer-mode))
(curwin (selected-window))
(curframe (selected-frame)))
(unless (listp allowed-modes)
(setq allowed-modes (list allowed-modes)))
(let (same-mode-same-frame
same-mode-other-frame
derived-mode-same-frame
derived-mode-other-frame)
(dolist (window windows)
(let ((mode?
(with-current-buffer (window-buffer window)
(cond ((memq major-mode allowed-modes)
'same)
((apply #'derived-mode-p allowed-modes)
'derived)))))
(when (and mode?
(not (and inhibit-same-window-p
(eq window curwin))))
(push window (if (eq curframe (window-frame window))
(if (eq mode? 'same)
same-mode-same-frame
derived-mode-same-frame)
(if (eq mode? 'same)
same-mode-other-frame
derived-mode-other-frame))))))
(let ((window (car (nconc same-mode-same-frame
same-mode-other-frame
derived-mode-same-frame
derived-mode-other-frame))))
(when (window-live-p window)
(prog1 (window--display-buffer buffer window 'reuse alist)
(unless (cdr (assq 'inhibit-switch-frame alist))
(window--maybe-raise-frame (window-frame window)))))))))
(defun display-buffer--special-action (buffer)
"Return special display action for BUFFER, if any.
If `special-display-p' returns non-nil for BUFFER, return an
appropriate display action involving `special-display-function'.
See `display-buffer' for the format of display actions."
(and special-display-function
;; `special-display-p' returns either t or a list of frame
;; parameters to pass to `special-display-function'.
(let ((pars (special-display-p (buffer-name buffer))))
(when pars
(list (list #'display-buffer-reuse-window
(lambda (buffer _alist)
(funcall special-display-function
buffer (if (listp pars) pars)))))))))
(defun display-buffer-pop-up-frame (buffer alist)
"Display BUFFER in a new frame.
This works by calling `pop-up-frame-function'. If successful,
return the window used; otherwise return nil.
ALIST is an association list of action symbols and values. See
Info node `(elisp) Buffer Display Action Alists' for details of
such alists.
If ALIST has a non-nil `inhibit-switch-frame' entry, avoid
raising the new frame. A non-nil `pop-up-frame-parameters' entry
specifies an alist of frame parameters to give the new frame.
This is an action function for buffer display, see Info
node `(elisp) Buffer Display Action Functions'. It should be
called only by `display-buffer' or a function directly or
indirectly called by the latter."
(let* ((params (cdr (assq 'pop-up-frame-parameters alist)))
(pop-up-frame-alist (append params pop-up-frame-alist))
(fun pop-up-frame-function)
frame window)
(when (and fun
;; Make BUFFER current so `make-frame' will use it as the
;; new frame's buffer (Bug#15133).
(with-current-buffer buffer
(setq frame (funcall fun)))
(setq window (frame-selected-window frame)))
(prog1 (window--display-buffer buffer window 'frame alist)
(unless (cdr (assq 'inhibit-switch-frame alist))
(window--maybe-raise-frame frame))))))
(defun display-buffer-pop-up-window (buffer alist)
"Display BUFFER by popping up a new window.
The new window is created on the selected frame, or in
`last-nonminibuffer-frame' if no windows can be created there.
If successful, return the new window; otherwise return nil.
ALIST is an association list of action symbols and values. See
Info node `(elisp) Buffer Display Action Alists' for details of
such alists.
If ALIST has a non-nil `inhibit-switch-frame' entry, then in the
event that the new window is created on another frame, avoid
raising the frame.
This is an action function for buffer display, see Info
node `(elisp) Buffer Display Action Functions'. It should be
called only by `display-buffer' or a function directly or
indirectly called by the latter."
(let ((frame (or (window--frame-usable-p (selected-frame))
(window--frame-usable-p (last-nonminibuffer-frame))))
window)
(when (and (or (not (frame-parameter frame 'unsplittable))
;; If the selected frame cannot be split, look at
;; `last-nonminibuffer-frame'.
(and (eq frame (selected-frame))
(setq frame (last-nonminibuffer-frame))
(window--frame-usable-p frame)
(not (frame-parameter frame 'unsplittable))))
;; Attempt to split largest or least recently used window.
(setq window (or (window--try-to-split-window
(get-largest-window frame t) alist)
(window--try-to-split-window
(get-lru-window frame t) alist))))
(prog1 (window--display-buffer buffer window 'window alist)
(unless (cdr (assq 'inhibit-switch-frame alist))
(window--maybe-raise-frame (window-frame window)))))))
(defun display-buffer--maybe-pop-up-frame-or-window (buffer alist)
"Try displaying BUFFER based on `pop-up-frames' or `pop-up-windows'.
ALIST is an association list of action symbols and values. See
Info node `(elisp) Buffer Display Action Alists' for details of
such alists.
If `pop-up-frames' is non-nil (and not `graphic-only' on a
text-only terminal), try with `display-buffer-pop-up-frame'. If
that cannot be done, and `pop-up-windows' is non-nil, try again
with `display-buffer-pop-up-window'."
(or (display-buffer--maybe-pop-up-frame buffer alist)
(display-buffer--maybe-pop-up-window buffer alist)))
(defun display-buffer--maybe-pop-up-frame (buffer alist)
"Try displaying BUFFER based on `pop-up-frames'.
If `pop-up-frames' is non-nil (and not `graphic-only' on a
text-only terminal), try with `display-buffer-pop-up-frame'.
ALIST is an association list of action symbols and values. See
Info node `(elisp) Buffer Display Action Alists' for details of
such alists."
(and (if (eq pop-up-frames 'graphic-only)
(display-graphic-p)
pop-up-frames)
(display-buffer-pop-up-frame buffer alist)))
(defun display-buffer--maybe-pop-up-window (buffer alist)
"Try displaying BUFFER based on `pop-up-windows'.
If `pop-up-windows' is non-nil, try with `display-buffer-pop-up-window'."
(and pop-up-windows
(display-buffer-pop-up-window buffer alist)))
(defun display-buffer-in-child-frame (buffer alist)
"Display BUFFER in a child frame.
By default, this either reuses a child frame of the selected
frame or makes a new child frame of the selected frame. If
successful, return the window used; otherwise return nil.
ALIST is an association list of action symbols and values. See
Info node `(elisp) Buffer Display Action Alists' for details of
such alists.
If ALIST has a non-nil `child-frame-parameters' entry, the
corresponding value is an alist of frame parameters to give the
new frame. A `parent-frame' parameter specifying the selected
frame is provided by default. If the child frame shall be or
become the child of any other frame, a corresponding entry must
be added to ALIST.
This is an action function for buffer display, see Info
node `(elisp) Buffer Display Action Functions'. It should be
called only by `display-buffer' or a function directly or
indirectly called by the latter."
(let* ((parameters
(append
(cdr (assq 'child-frame-parameters alist))
`((parent-frame . ,(selected-frame)))))
(parent (or (assq 'parent-frame parameters)
(selected-frame)))
(share (assq 'share-child-frame parameters))
share1 frame window type)
(with-current-buffer buffer
(when (frame-live-p parent)
(catch 'frame
(dolist (frame1 (frame-list))
(when (eq (frame-parent frame1) parent)
(setq share1 (assq 'share-child-frame
(frame-parameters frame1)))
(when (eq share share1)
(setq frame frame1)
(throw 'frame t))))))
(if frame
(progn
(setq window (frame-selected-window frame))
(setq type 'reuse))
(setq frame (make-frame parameters))
(setq window (frame-selected-window frame))
(setq type 'frame)))
(prog1 (window--display-buffer buffer window type alist)
(unless (cdr (assq 'inhibit-switch-frame alist))
(window--maybe-raise-frame frame)))))
(defun windows-sharing-edge (&optional window edge within)
"Return list of live windows sharing the same edge with WINDOW.
WINDOW must be a valid window and defaults to the selected one.
EDGE stands for the edge to share and must be either `left',
`above', `right' or `below'. Omitted or nil, EDGE defaults to
`left'.
WITHIN nil means to find a live window that shares the opposite
EDGE with WINDOW. For example, if EDGE equals `left', WINDOW has
to share (part of) the right edge of any window returned. WITHIN
non-nil means to find all live windows that share the same EDGE
with WINDOW (Window must be internal in this case). So if EDGE
equals `left', WINDOW's left edge has to fully encompass the left
edge of any window returned."
(setq window (window-normalize-window window))
(setq edge (or edge 'left))
(when (and within (window-live-p window))
(error "Cannot share edge from within live window %s" window))
(let ((window-edges (window-edges window nil nil t))
(horizontal (memq edge '(left right)))
(n (pcase edge
('left 0) ('above 1) ('right 2) ('below 3))))
(unless (numberp n)
(error "Invalid EDGE %s" edge))
(let ((o (mod (+ 2 n) 4))
(p (if horizontal 1 0))
(q (if horizontal 3 2))
windows)
(walk-window-tree
(lambda (other)
(let ((other-edges (window-edges other nil nil t)))
(when (and (not (eq window other))
(= (nth n window-edges)
(nth (if within n o) other-edges))
(cond
((= (nth p window-edges) (nth p other-edges)))
((< (nth p window-edges) (nth p other-edges))
(< (nth p other-edges) (nth q window-edges)))
(t
(< (nth p window-edges) (nth q other-edges)))))
(setq windows (cons other windows)))))
(window-frame window) nil 'nomini)
(reverse windows))))
(defun window--try-to-split-window-in-direction (window direction alist)
"Try to split WINDOW in DIRECTION.
DIRECTION is passed as SIDE argument to `split-window-no-error'.
ALIST is a buffer display alist."
(and (not (frame-parameter (window-frame window) 'unsplittable))
(let* ((window-combination-limit
;; When `window-combination-limit' equals
;; `display-buffer' or equals `resize-window' and a
;; `window-height' or `window-width' alist entry are
;; present, bind it to t so resizing steals space
;; preferably from the window that was split.
(if (or (eq window-combination-limit 'display-buffer)
(and (eq window-combination-limit 'window-size)
(or (cdr (assq 'window-height alist))
(cdr (assq 'window-width alist)))))
t
window-combination-limit))
(new-window (split-window-no-error window nil direction)))
(and (window-live-p new-window) new-window))))
(defun display-buffer-in-direction (buffer alist)
"Try to display BUFFER in a direction specified by ALIST.
ALIST is an association list of action symbols and values. See
Info node `(elisp) Buffer Display Action Alists' for details of
such alists.
ALIST has to contain a `direction' entry whose value should be
one of `left', `above' (or `up'), `right' and `below' (or `down').
Other values are usually interpreted as `below'.
If ALIST also contains a `window' entry, its value specifies a
reference window. That value can be a special symbol like
`main' (which stands for the selected frame's main window) or
`root' (standings for the selected frame's root window) or an
arbitrary valid window. Any other value (or omitting the
`window' entry) means to use the selected window as reference
window.
This function tries to reuse or split a window such that the
window produced this way is on the side of the reference window
specified by the `direction' entry.
Four special values for `direction' entries allow to implicitly
specify the selected frame's main window as reference window:
`leftmost', `top', `rightmost' and `bottom'. Hence, instead of
`(direction . left) (window . main)' one can simply write
`(direction . leftmost)'.
This is an action function for buffer display, see Info
node `(elisp) Buffer Display Action Functions'. It should be
called only by `display-buffer' or a function directly or
indirectly called by the latter."
(let ((direction (cdr (assq 'direction alist))))
(when direction
(let ((window (cdr (assq 'window alist)))
within windows other-window-shows-buffer other-window)
;; Sanitize WINDOW.
(cond
((or (eq window 'main)
(memq direction '(top bottom leftmost rightmost)))
(setq window (window-main-window)))
((eq window 'root)
(setq window (frame-root-window)))
((window-valid-p window))
(t
(setq window (selected-window))))
(setq within (not (window-live-p window)))
;; Sanitize DIRECTION
(cond
((memq direction '(left above right below)))
((eq direction 'leftmost)
(setq direction 'left))
((memq direction '(top up))
(setq direction 'above))
((eq direction 'rightmost)
(setq direction 'right))
((memq direction '(bottom down))
(setq direction 'below))
(t
(setq direction 'below)))
(setq alist
(append alist
`(,(if temp-buffer-resize-mode
'(window-height . resize-temp-buffer-window)
'(window-height . fit-window-to-buffer))
,(when temp-buffer-resize-mode
'(preserve-size . (nil . t))))))
(setq windows (windows-sharing-edge window direction within))
(dolist (other windows)
(cond
((and (not other-window-shows-buffer)
(eq buffer (window-buffer other)))
(setq other-window-shows-buffer t)
(setq other-window other))
((not other-window)
(setq other-window other))))
(or (and other-window-shows-buffer
(window--display-buffer buffer other-window 'reuse alist))
(and (setq other-window
(window--try-to-split-window-in-direction
window direction alist))
(window--display-buffer buffer other-window 'window alist))
(and (setq window other-window)
(not (window-dedicated-p other-window))
(not (window-minibuffer-p other-window))
(window--display-buffer buffer other-window 'reuse alist)))))))
;; This should be rewritten as
;; (display-buffer-in-direction buffer (cons '(direction . below) alist))
(defun display-buffer-below-selected (buffer alist)
"Try displaying BUFFER in a window below the selected window.
If there is a window below the selected one and that window
already displays BUFFER, use that window. Otherwise, try to
create a new window below the selected one and show BUFFER there.
If that attempt fails as well and there is a non-dedicated window
below the selected one, use that window.
ALIST is an association list of action symbols and values. See
Info node `(elisp) Buffer Display Action Alists' for details of
such alists.
If ALIST contains a `window-min-height' entry, this function
ensures that the window used is or can become at least as high as
specified by that entry's value. Note that such an entry alone
will not resize the window per se. In order to do that, ALIST
must also contain a `window-height' entry with the same value.
This is an action function for buffer display, see Info
node `(elisp) Buffer Display Action Functions'. It should be
called only by `display-buffer' or a function directly or
indirectly called by the latter."
(let ((min-height (cdr (assq 'window-min-height alist)))
window)
(or (and (setq window (window-in-direction 'below))
(eq buffer (window-buffer window))
(or (not (numberp min-height))
(>= (window-height window) min-height)
;; 'window--display-buffer' can resize this window if
;; and only if it has a 'quit-restore' parameter
;; certifying that it always showed BUFFER before.
(let ((height (window-height window))
(quit-restore (window-parameter window 'quit-restore)))
(and quit-restore
(eq (nth 1 quit-restore) 'window)
(window-resizable-p window (- min-height height)))))
(window--display-buffer buffer window 'reuse alist))
(and (not (frame-parameter nil 'unsplittable))
(or (not (numberp min-height))
(window-sizable-p nil (- min-height)))
(let ((split-height-threshold 0)
split-width-threshold)
(setq window (window--try-to-split-window
(selected-window) alist)))
(window--display-buffer buffer window 'window alist))
(and (setq window (window-in-direction 'below))
(not (window-dedicated-p window))
(or (not (numberp min-height))
;; A window that showed another buffer before cannot
;; be resized.
(>= (window-height window) min-height))
(window--display-buffer buffer window 'reuse alist)))))
(defun display-buffer--maybe-at-bottom (buffer alist)
(let ((alist (append alist `(,(if temp-buffer-resize-mode
'(window-height . resize-temp-buffer-window)
'(window-height . fit-window-to-buffer))
,(when temp-buffer-resize-mode
'(preserve-size . (nil . t)))))))
(or (display-buffer--maybe-same-window buffer alist)
(display-buffer-reuse-window buffer alist)
(display-buffer--maybe-pop-up-frame buffer alist)
(display-buffer-at-bottom buffer alist))))
;; This should be rewritten as
;; (display-buffer-in-direction buffer (cons '(direction . bottom) alist))
(defun display-buffer-at-bottom (buffer alist)
"Try displaying BUFFER in a window at the bottom of the selected frame.
This either reuses such a window provided it shows BUFFER
already, splits a window at the bottom of the frame or the
frame's root window, or reuses some window at the bottom of the
selected frame.
ALIST is an association list of action symbols and values. See
Info node `(elisp) Buffer Display Action Alists' for details of
such alists.
This is an action function for buffer display, see Info
node `(elisp) Buffer Display Action Functions'. It should be
called only by `display-buffer' or a function directly or
indirectly called by the latter."
(let (bottom-window bottom-window-shows-buffer window)
(walk-window-tree
(lambda (window)
(cond
((window-in-direction 'below window))
((and (not bottom-window-shows-buffer)
(eq buffer (window-buffer window)))
(setq bottom-window-shows-buffer t)
(setq bottom-window window))
((not bottom-window)
(setq bottom-window window))))
nil nil 'nomini)
(or (and bottom-window-shows-buffer
(window--display-buffer buffer bottom-window 'reuse alist))
(and (not (frame-parameter nil 'unsplittable))
(setq window (split-window-no-error (window-main-window)))
(window--display-buffer buffer window 'window alist))
(and (setq window bottom-window)
(not (window-dedicated-p window))
(window--display-buffer buffer window 'reuse alist)))))
(defun display-buffer-in-previous-window (buffer alist)
"Display BUFFER in a window previously showing it.
ALIST is an association list of action symbols and values. See
Info node `(elisp) Buffer Display Action Alists' for details of
such alists.
If ALIST has a non-nil `inhibit-same-window' entry, the selected
window is not usable. A dedicated window is usable only if it
already shows BUFFER. If ALIST contains a `previous-window'
entry, the window specified by that entry (either a variable
or a value) is usable even if it never showed BUFFER before.
If ALIST contains a `reusable-frames' entry, its value determines
which frames to search for a usable window:
nil -- the selected frame (actually the last non-minibuffer frame)
A frame -- just that frame
`visible' -- all visible frames
0 -- all frames on the current terminal
t -- all frames.
If ALIST contains no `reusable-frames' entry, search just the
selected frame if `display-buffer-reuse-frames' and
`pop-up-frames' are both nil; search all frames on the current
terminal if either of those variables is non-nil.
If more than one window is usable according to these rules,
apply the following order of preference:
- Use the window specified by any `previous-window' ALIST entry,
provided it is not the selected window.
- Use a window that showed BUFFER before, provided it is not the
selected window.
- Use the selected window if it is either specified by a
`previous-window' ALIST entry or showed BUFFER before.
This is an action function for buffer display, see Info
node `(elisp) Buffer Display Action Functions'. It should be
called only by `display-buffer' or a function directly or
indirectly called by the latter."
(let* ((alist-entry (assq 'reusable-frames alist))
(inhibit-same-window
(cdr (assq 'inhibit-same-window alist)))
(frames (cond
(alist-entry (cdr alist-entry))
((if (eq pop-up-frames 'graphic-only)
(display-graphic-p)
pop-up-frames)
0)
(display-buffer-reuse-frames 0)
(t (last-nonminibuffer-frame))))
(previous-window (cdr (assq 'previous-window alist)))
best-window second-best-window window)
;; Scan windows whether they have shown the buffer recently.
(catch 'best
(dolist (window (window-list-1 (frame-first-window) 'nomini frames))
(when (and (assq buffer (window-prev-buffers window))
(not (window-dedicated-p window)))
(if (eq window (selected-window))
(unless inhibit-same-window
(setq second-best-window window))
(setq best-window window)
(throw 'best t)))))
;; When ALIST has a `previous-window' entry, that entry may override
;; anything we found so far.
(when (and previous-window (symbolp previous-window)
(boundp previous-window))
(setq previous-window (symbol-value previous-window)))
(when (and (setq window previous-window)
(window-live-p window)
(or (eq buffer (window-buffer window))
(not (window-dedicated-p window))))
(if (eq window (selected-window))
(unless inhibit-same-window
(setq second-best-window window))
(setq best-window window)))
;; Return best or second best window found.
(when (setq window (or best-window second-best-window))
(window--display-buffer buffer window 'reuse alist))))
(defun display-buffer-use-least-recent-window (buffer alist)
"Display BUFFER in an existing window, but that hasn't been used lately.
This `display-buffer' action function is like
`display-buffer-use-some-window', but will cycle through windows
when displaying buffers repeatedly, and if there's only a single
window, it will split the window."
(when-let ((window (display-buffer-use-some-window
buffer (cons (cons 'inhibit-same-window t) alist))))
(window-bump-use-time window)))
(defun display-buffer-use-some-window (buffer alist)
"Display BUFFER in an existing window.
Search for a usable window, set that window to the buffer, and
return the window. If no suitable window is found, return nil.
ALIST is an association list of action symbols and values. See
Info node `(elisp) Buffer Display Action Alists' for details of
such alists.
If ALIST has a non-nil `inhibit-switch-frame' entry, then in the
event that a window on another frame is chosen, avoid raising
that frame.
This is an action function for buffer display, see Info
node `(elisp) Buffer Display Action Functions'. It should be
called only by `display-buffer' or a function directly or
indirectly called by the latter."
(let* ((not-this-window (cdr (assq 'inhibit-same-window alist)))
(frame (or (window--frame-usable-p (selected-frame))
(window--frame-usable-p (last-nonminibuffer-frame))))
(window
;; Reuse an existing window.
(or (get-lru-window frame nil not-this-window)
(let ((window (get-buffer-window buffer 'visible)))
(unless (and not-this-window
(eq window (selected-window)))
window))
(get-largest-window 'visible nil not-this-window)
(let ((window (get-buffer-window buffer 0)))
(unless (and not-this-window
(eq window (selected-window)))
window))
(get-largest-window 0 nil not-this-window)))
(quit-restore (and (window-live-p window)
(window-parameter window 'quit-restore)))
(quad (nth 1 quit-restore)))
(when (window-live-p window)
;; If the window was used by `display-buffer' before, try to
;; resize it to its old height but don't signal an error.
(when (and (listp quad)
(integerp (nth 3 quad))
(> (nth 3 quad) (window-total-height window)))
(condition-case nil
(window-resize window (- (nth 3 quad) (window-total-height window)))
(error nil)))
(prog1
(window--display-buffer buffer window 'reuse alist)
(window--even-window-sizes window)
(unless (cdr (assq 'inhibit-switch-frame alist))
(window--maybe-raise-frame (window-frame window)))))))
(defun display-buffer-no-window (_buffer alist)
"Display BUFFER in no window.
ALIST is an association list of action symbols and values. See
Info node `(elisp) Buffer Display Action Alists' for details of
such alists.
If ALIST contains a non-nil `allow-no-window' entry, do nothing
and return `fail'. This allows `display-buffer' to override the
default action and avoid displaying the buffer. It is assumed
that when the caller specifies a non-nil `allow-no-window' ALIST
entry, it can handle a nil value returned by `display-buffer'.
This is an action function for buffer display, see Info
node `(elisp) Buffer Display Action Functions'. It should be
called only by `display-buffer' or a function directly or
indirectly called by the latter."
(when (cdr (assq 'allow-no-window alist))
'fail))
;;; Display + selection commands:
(defun pop-to-buffer (buffer-or-name &optional action norecord)
"Display buffer specified by BUFFER-OR-NAME and select its window.
BUFFER-OR-NAME may be a buffer, a string (a buffer name), or nil.
If it is a string not naming an existent buffer, create a buffer
with that name. If BUFFER-OR-NAME is nil, choose some other
buffer. In either case, make that buffer current and return it.
This uses `display-buffer' as a subroutine. The optional ACTION
argument is passed to `display-buffer' as its ACTION argument.
See `display-buffer' for more information. ACTION is t if called
interactively with a prefix argument, which means to pop to a
window other than the selected one even if the buffer is already
displayed in the selected window.
If a suitable window is found, select that window. If it is not
on the selected frame, raise that window's frame and give it
input focus.
Optional third arg NORECORD non-nil means do not put this buffer
at the front of the list of recently selected ones."
(interactive (list (read-buffer "Pop to buffer: " (other-buffer))
(if current-prefix-arg t)))
(let* ((buffer (window-normalize-buffer-to-switch-to buffer-or-name))
(old-frame (selected-frame))
(window (display-buffer buffer action)))
;; Don't assume that `display-buffer' has supplied us with a window
;; (Bug#24332).
(if window
(let ((frame (window-frame window)))
;; If we chose another frame, make sure it gets input focus.
(unless (eq frame old-frame)
(select-frame-set-input-focus frame norecord))
;; Make sure the window is selected (Bug#8615), (Bug#6954)
(select-window window norecord))
;; If `display-buffer' failed to supply a window, just make the
;; buffer current.
(set-buffer buffer))
;; Return BUFFER even when we got no window.
buffer))
(defun pop-to-buffer-same-window (buffer &optional norecord)
"Select buffer BUFFER in some window, preferably the same one.
BUFFER may be a buffer, a string (a buffer name), or nil. If it
is a string not naming an existent buffer, create a buffer with
that name. If BUFFER is nil, choose some other buffer. Return
the buffer.
Optional argument NORECORD, if non-nil means do not put this
buffer at the front of the list of recently selected ones.
Unlike `pop-to-buffer', this function prefers using the selected
window over popping up a new window or frame. Specifically, if
the selected window is neither a minibuffer window (as reported
by `window-minibuffer-p'), nor is dedicated to another buffer
(see `window-dedicated-p'), BUFFER will be displayed in the
currently selected window; otherwise it will be displayed in
another window."
(pop-to-buffer buffer display-buffer--same-window-action norecord))
(defun read-buffer-to-switch (prompt)
"Read the name of a buffer to switch to, prompting with PROMPT.
Return the name of the buffer as a string.
This function is intended for the `switch-to-buffer' family of
commands since these need to omit the name of the current buffer
from the list of completions and default values."
(let ((rbts-completion-table (internal-complete-buffer-except)))
(minibuffer-with-setup-hook
(lambda ()
(setq minibuffer-completion-table rbts-completion-table)
;; Since rbts-completion-table is built dynamically, we
;; can't just add it to the default value of
;; icomplete-with-completion-tables, so we add it
;; here manually.
(if (and (boundp 'icomplete-with-completion-tables)
(listp icomplete-with-completion-tables))
(setq-local icomplete-with-completion-tables
(cons rbts-completion-table
icomplete-with-completion-tables))))
(read-buffer prompt (other-buffer (current-buffer))
(confirm-nonexistent-file-or-buffer)))))
(defun window-normalize-buffer-to-switch-to (buffer-or-name)
"Normalize BUFFER-OR-NAME argument of buffer switching functions.
If BUFFER-OR-NAME is nil, return the buffer returned by
`other-buffer'. Else, if a buffer specified by BUFFER-OR-NAME
exists, return that buffer. If no such buffer exists, create a
buffer with the name BUFFER-OR-NAME and return that buffer."
(if buffer-or-name
(or (get-buffer buffer-or-name)
(let ((buffer (get-buffer-create buffer-or-name)))
(set-buffer-major-mode buffer)
buffer))
(other-buffer)))
(defcustom switch-to-buffer-preserve-window-point t
"If non-nil, `switch-to-buffer' tries to preserve `window-point'.
If this is nil, `switch-to-buffer' displays the buffer at that
buffer's `point'. If this is `already-displayed', it tries to
display the buffer at its previous position in the selected
window, provided the buffer is currently displayed in some other
window on any visible or iconified frame. If this is t, it
unconditionally tries to display the buffer at its previous
position in the selected window.
This variable is ignored if the buffer is already displayed in
the selected window or never appeared in it before, or if
`switch-to-buffer' calls `pop-to-buffer' to display the buffer,
or non-nil `switch-to-buffer-obey-display-actions' displays it
in another window."
:type '(choice
(const :tag "Never" nil)
(const :tag "If already displayed elsewhere" already-displayed)
(const :tag "Always" t))
:group 'windows
:version "26.1")
(defcustom switch-to-buffer-in-dedicated-window nil
"Allow switching to buffer in strongly dedicated windows.
If non-nil, allow `switch-to-buffer' to proceed when called
interactively and the selected window is strongly dedicated to
its buffer.
The following values are recognized:
nil - disallow switching; signal an error
prompt - prompt user whether to allow switching
pop - perform `pop-to-buffer' instead
t - undedicate selected window and switch
When called non-interactively, `switch-to-buffer' always signals
an error when the selected window is dedicated to its buffer and
FORCE-SAME-WINDOW is non-nil."
:type '(choice
(const :tag "Disallow" nil)
(const :tag "Prompt" prompt)
(const :tag "Pop" pop)
(const :tag "Allow" t))
:group 'windows
:version "25.1")
(defcustom switch-to-buffer-obey-display-actions nil
"If non-nil, `switch-to-buffer' runs `pop-to-buffer-same-window' instead.
This means that when switching the buffer it respects display actions
specified by `display-buffer-overriding-action', `display-buffer-alist'
and other display related variables. So `switch-to-buffer' will display
the buffer in the window specified by the rules from these variables."
:type 'boolean
:group 'windows
:version "27.1")
(defun switch-to-buffer (buffer-or-name &optional norecord force-same-window)
"Display buffer BUFFER-OR-NAME in the selected window.
WARNING: This is NOT the way to work on another buffer temporarily
within a Lisp program! Use `set-buffer' instead. That avoids
messing with the `window-buffer' correspondences.
If the selected window cannot display the specified buffer
because it is a minibuffer window or strongly dedicated to
another buffer, call `pop-to-buffer' to select the buffer in
another window. In interactive use, if the selected window is
strongly dedicated to its buffer, the value of the option
`switch-to-buffer-in-dedicated-window' specifies how to proceed.
If called interactively, read the buffer name using `read-buffer'.
The variable `confirm-nonexistent-file-or-buffer' determines
whether to request confirmation before creating a new buffer.
See `read-buffer' for features related to input and completion
of buffer names.
BUFFER-OR-NAME may be a buffer, a string (a buffer name), or nil.
If BUFFER-OR-NAME is a string that does not identify an existing
buffer, create a buffer with that name. If BUFFER-OR-NAME is
nil, switch to the buffer returned by `other-buffer'.
If optional argument NORECORD is non-nil, do not put the buffer
at the front of the buffer list, and do not make the window
displaying it the most recently selected one.
If optional argument FORCE-SAME-WINDOW is non-nil, the buffer
must be displayed in the selected window when called
non-interactively; if that is impossible, signal an error rather
than calling `pop-to-buffer'. It has no effect when the option
`switch-to-buffer-obey-display-actions' is non-nil.
The option `switch-to-buffer-preserve-window-point' can be used
to make the buffer appear at its last position in the selected
window.
If the option `switch-to-buffer-obey-display-actions' is non-nil,
run the function `pop-to-buffer-same-window' instead.
This may display the buffer in another window as specified by
`display-buffer-overriding-action', `display-buffer-alist' and
other display related variables. If this results in displaying
the buffer in the selected window, window start and point are adjusted
as prescribed by the option `switch-to-buffer-preserve-window-point'.
Otherwise, these are left alone.
Return the buffer switched to."
(interactive
(let ((force-same-window
(unless switch-to-buffer-obey-display-actions
(cond
((window-minibuffer-p) nil)
((not (eq (window-dedicated-p) t)) 'force-same-window)
((pcase switch-to-buffer-in-dedicated-window
('nil (user-error
"Cannot switch buffers in a dedicated window"))
('prompt
(if (y-or-n-p
(format "Window is dedicated to %s; undedicate it?"
(window-buffer)))
(progn
(set-window-dedicated-p nil nil)
'force-same-window)
(user-error
"Cannot switch buffers in a dedicated window")))
('pop nil)
(_ (set-window-dedicated-p nil nil) 'force-same-window)))))))
(list (read-buffer-to-switch "Switch to buffer: ") nil force-same-window)))
(let ((buffer (window-normalize-buffer-to-switch-to buffer-or-name))
(set-window-start-and-point (not switch-to-buffer-obey-display-actions)))
(cond
;; Don't call set-window-buffer if it's not needed since it
;; might signal an error (e.g. if the window is dedicated).
((and (eq buffer (window-buffer))
;; pop-to-buffer-same-window might decide to display
;; the same buffer in another window
(not switch-to-buffer-obey-display-actions)))
((and (window-minibuffer-p)
(not switch-to-buffer-obey-display-actions))
(if force-same-window
(user-error "Cannot switch buffers in minibuffer window")
(pop-to-buffer buffer norecord)))
((and (eq (window-dedicated-p) t)
(not switch-to-buffer-obey-display-actions))
(if force-same-window
(user-error "Cannot switch buffers in a dedicated window")
(pop-to-buffer buffer norecord)))
(t
(when switch-to-buffer-obey-display-actions
(let ((selected-window (selected-window)))
(pop-to-buffer-same-window buffer norecord)
(when (eq (selected-window) selected-window)
(setq set-window-start-and-point t))))
(when set-window-start-and-point
(let* ((entry (assq buffer (window-prev-buffers)))
(preserve-win-point
(buffer-local-value 'switch-to-buffer-preserve-window-point
buffer))
(displayed (and (eq preserve-win-point 'already-displayed)
(get-buffer-window buffer 0))))
(set-window-buffer nil buffer)
(when (and entry (or (eq preserve-win-point t) displayed))
;; Try to restore start and point of buffer in the selected
;; window (Bug#4041).
(set-window-start (selected-window) (nth 1 entry) t)
(set-window-point nil (nth 2 entry)))))))
(unless norecord
(select-window (selected-window)))
(set-buffer buffer)))
(defun switch-to-buffer-other-window (buffer-or-name &optional norecord)
"Select the buffer specified by BUFFER-OR-NAME in another window.
BUFFER-OR-NAME may be a buffer, a string (a buffer name), or
nil. Return the buffer switched to.
If called interactively, read the buffer name using `read-buffer'.
The variable `confirm-nonexistent-file-or-buffer' determines
whether to request confirmation before creating a new buffer.
See `read-buffer' for features related to input and completion
of buffer names.
If BUFFER-OR-NAME is a string and does not identify an existing
buffer, create a new buffer with that name. If BUFFER-OR-NAME is
nil, switch to the buffer returned by `other-buffer'.
Optional second argument NORECORD non-nil means do not put this
buffer at the front of the list of recently selected ones.
This uses the function `display-buffer' as a subroutine; see its
documentation for additional customization information."
(interactive
(list (read-buffer-to-switch "Switch to buffer in other window: ")))
(let ((pop-up-windows t))
(pop-to-buffer buffer-or-name t norecord)))
(defun switch-to-buffer-other-frame (buffer-or-name &optional norecord)
"Switch to buffer BUFFER-OR-NAME in another frame.
BUFFER-OR-NAME may be a buffer, a string (a buffer name), or
nil. Return the buffer switched to.
This uses the function `display-buffer' as a subroutine to
display the buffer; see its documentation for additional
customization information. By default, if the buffer is already
displayed (even in the current frame), that window is selected.
If the buffer isn't displayed in any frame, a new frame is popped
up and the buffer is displayed there.
If called interactively, read the buffer name using `read-buffer'.
The variable `confirm-nonexistent-file-or-buffer' determines
whether to request confirmation before creating a new buffer.
See `read-buffer' for features related to input and completion
of buffer names.
If BUFFER-OR-NAME is a string and does not identify an existing
buffer, create a new buffer with that name. If BUFFER-OR-NAME is
nil, switch to the buffer returned by `other-buffer'.
Optional second arg NORECORD non-nil means do not put this
buffer at the front of the list of recently selected ones."
(interactive
(list (read-buffer-to-switch "Switch to buffer in other frame: ")))
(pop-to-buffer buffer-or-name display-buffer--other-frame-action norecord))
(defun display-buffer-override-next-command (pre-function &optional post-function echo)
"Set `display-buffer-overriding-action' for the next command.
`pre-function' is called to prepare the window where the buffer should be
displayed. This function takes two arguments `buffer' and `alist', and
should return a cons with the displayed window and its type. See the
meaning of these values in `window--display-buffer'.
Optional `post-function' is called after the buffer is displayed in the
window; the function takes two arguments: an old and new window.
Optional string argument `echo' can be used to add a prefix to the
command echo keystrokes that should describe the current prefix state.
This returns an \"exit function\", which can be called with no argument
to deactivate this overriding action."
(let* ((old-window (or (minibuffer-selected-window) (selected-window)))
(new-window nil)
(minibuffer-depth (minibuffer-depth))
(clearfun (make-symbol "clear-display-buffer-overriding-action"))
(postfun (make-symbol "post-display-buffer-override-next-command"))
(action (lambda (buffer alist)
(unless (> (minibuffer-depth) minibuffer-depth)
(let* ((ret (funcall pre-function buffer alist))
(window (car ret))
(type (cdr ret)))
(setq new-window (window--display-buffer buffer window
type alist))
;; Reset display-buffer-overriding-action
;; after the first display-buffer action (bug#39722).
(funcall clearfun)
new-window))))
(command this-command)
(echofun (when echo (lambda () echo)))
(exitfun
(lambda ()
(funcall clearfun)
(remove-hook 'post-command-hook postfun)
(remove-hook 'prefix-command-echo-keystrokes-functions echofun)
(when (functionp post-function)
(funcall post-function old-window new-window)))))
(fset clearfun
(lambda ()
(setcar display-buffer-overriding-action
(delq action (car display-buffer-overriding-action)))))
(fset postfun
(lambda ()
(unless (or
;; Remove the hook immediately
;; after exiting the minibuffer.
(> (minibuffer-depth) minibuffer-depth)
;; But don't remove immediately after
;; adding the hook by the same command below.
(eq this-command command))
(funcall exitfun))))
;; Call post-function after the next command finishes (bug#49057).
(add-hook 'post-command-hook postfun)
(when echofun
(add-hook 'prefix-command-echo-keystrokes-functions echofun))
(push action (car display-buffer-overriding-action))
exitfun))
\f
(defun set-window-text-height (window height)
"Set the height in lines of the text display area of WINDOW to HEIGHT.
WINDOW must be a live window and defaults to the selected one.
HEIGHT doesn't include the mode line or header line, if any, or
any partial-height lines in the text display area.
Note that the current implementation of this function cannot
always set the height exactly, but attempts to be conservative,
by allocating more lines than are actually needed in the case
where some error may be present."
(setq window (window-normalize-window window t))
(let ((delta (- height (window-text-height window))))
(unless (zerop delta)
;; Setting window-min-height to a value like 1 can lead to very
;; bizarre displays because it also allows Emacs to make *other*
;; windows one line tall, which means that there's no more space
;; for the mode line.
(let ((window-min-height (min 2 height)))
(window-resize window delta)))))
(defun enlarge-window-horizontally (delta)
"Make selected window DELTA columns wider.
Interactively, if no argument is given, make selected window one
column wider."
(interactive "p")
(enlarge-window delta t))
(defun shrink-window-horizontally (delta)
"Make selected window DELTA columns narrower.
Interactively, if no argument is given, make selected window one
column narrower."
(interactive "p")
(shrink-window delta t))
(defun count-screen-lines (&optional beg end count-final-newline window)
"Return the number of screen lines in the region.
The number of screen lines may be different from the number of actual lines,
due to line breaking, display table, etc.
Optional arguments BEG and END default to `point-min' and `point-max'
respectively.
If region ends with a newline, ignore it unless optional third argument
COUNT-FINAL-NEWLINE is non-nil.
The optional fourth argument WINDOW specifies the window used for obtaining
parameters such as width, horizontal scrolling, and so on. The default is
to use the selected window's parameters.
Like `vertical-motion', `count-screen-lines' always uses the current buffer,
regardless of which buffer is displayed in WINDOW. This makes possible to use
`count-screen-lines' in any buffer, whether or not it is currently displayed
in some window."
(unless beg
(setq beg (point-min)))
(unless end
(setq end (point-max)))
(if (= beg end)
0
(let ((start (min beg end))
(finish (max beg end))
count end-invisible-p)
;; When END is invisible because lines are truncated in WINDOW,
;; vertical-motion returns a number that is 1 larger than it
;; should. We need to fix that.
(setq end-invisible-p
(and (or truncate-lines
(and (natnump truncate-partial-width-windows)
(< (window-total-width window)
truncate-partial-width-windows)))
(save-excursion
(goto-char finish)
(> (- (current-column) (window-hscroll window))
(window-body-width window)))))
(save-excursion
(save-restriction
(widen)
(narrow-to-region start
(if (and (not count-final-newline)
(= ?\n (char-before finish)))
(1- finish)
finish))
(goto-char start)
(setq count (vertical-motion (buffer-size) window))
(if end-invisible-p count (1+ count)))))))
(defun window-buffer-height (window)
"Return the height (in screen lines) of the buffer that WINDOW is displaying.
WINDOW must be a live window and defaults to the selected one."
(setq window (window-normalize-window window t))
(with-current-buffer (window-buffer window)
(max 1
(count-screen-lines (point-min) (point-max)
;; If buffer ends with a newline, ignore it when
;; counting height unless point is after it.
(eobp)
window))))
(defun window-default-font-height (&optional window)
"Return height in pixels of WINDOW's default face font.
WINDOW must be a live window and defaults to the selected one.
The return value accounts for any remapping of the default face
font on WINDOW's frame."
(let* ((window (window-normalize-window window t))
(frame (window-frame window))
(default-font (face-font 'default frame)))
;; Client frames can have the 'display' parameter set like for X
;; frames, even though they are TTY frames, so make sure we won't
;; be duped by that up front with 'framep'.
(if (and (not (eq (framep frame) t))
(display-multi-font-p (frame-parameter frame 'display))
(not (string-equal (frame-parameter frame 'font) default-font)))
(aref (font-info default-font frame) 3)
(frame-char-height frame))))
(defun window-default-line-height (&optional window)
"Return height in pixels of a text line in WINDOW.
WINDOW must be a live window and defaults to the selected one.
The return value includes any line spacing defined for WINDOW's
buffer or frame and accounts for any remapping of the default
face on WINDOW's frame."
(let* ((window (window-normalize-window window t))
(font-height (window-default-font-height window))
(frame (window-frame window))
(buffer (window-buffer window))
(space-height
(or (and (display-graphic-p frame)
(or (buffer-local-value 'line-spacing buffer)
(frame-parameter frame 'line-spacing)))
0)))
(+ font-height
(if (floatp space-height)
(truncate (* (frame-char-height frame) space-height))
space-height))))
;;; Resizing windows and frames to fit their contents exactly.
(defcustom fit-window-to-buffer-horizontally nil
"Non-nil means `fit-window-to-buffer' can resize windows horizontally.
If this is nil, `fit-window-to-buffer' never resizes windows
horizontally. If this is `only', it can resize windows
horizontally only. Any other value means `fit-window-to-buffer'
can resize windows in both dimensions."
:type 'boolean
:version "24.4"
:group 'help)
;; `fit-frame-to-buffer' eventually wants to know the real frame sizes
;; counting title bar and outer borders.
(defcustom fit-frame-to-buffer nil
"Non-nil means `fit-window-to-buffer' can fit a frame to its buffer.
A frame is fit if and only if its root window is a live window
and this option is non-nil. If this is `horizontally', frames
are resized horizontally only. If this is `vertically', frames
are resized vertically only. Any other non-nil value means
frames can be resized in both dimensions."
:type 'boolean
:version "24.4"
:group 'help)
(defcustom fit-frame-to-buffer-margins '(nil nil nil nil)
"Margins around frame for `fit-frame-to-buffer'.
This specifies the numbers of pixels to be left free on the left,
above, on the right, and below a frame fitted to its buffer. Set
this to avoid obscuring other desktop objects like the taskbar.
The default is nil for each side, which means to not add margins.
The value specified here can be overridden for a specific frame
by that frame's `fit-frame-to-buffer-margins' parameter, if
present. See also `fit-frame-to-buffer-sizes'."
:version "24.4"
:type '(list
(choice
:tag "Left"
:value nil
:format "%[LeftMargin%] %v "
(const :tag "None" :format "%t" nil)
(integer :tag "Pixels" :size 5))
(choice
:tag "Top"
:value nil
:format "%[TopMargin%] %v "
(const :tag "None" :format "%t" nil)
(integer :tag "Pixels" :size 5))
(choice
:tag "Right"
:value nil
:format "%[RightMargin%] %v "
(const :tag "None" :format "%t" nil)
(integer :tag "Pixels" :size 5))
(choice
:tag "Bottom"
:value nil
:format "%[BottomMargin%] %v "
(const :tag "None" :format "%t" nil)
(integer :tag "Pixels" :size 5)))
:group 'help)
(defcustom fit-frame-to-buffer-sizes '(nil nil nil nil)
"Size boundaries of frame for `fit-frame-to-buffer'.
This list specifies the total maximum and minimum lines and
maximum and minimum columns of the root window of any frame that
shall be fit to its buffer. If any of these values is non-nil,
it overrides the corresponding argument of `fit-frame-to-buffer'.
On window systems where the menubar can wrap, fitting a frame to
its buffer may swallow the last line(s). Specifying an
appropriate minimum width value here can avoid such wrapping.
See also `fit-frame-to-buffer-margins'."
:version "24.4"
:type '(list
(choice
:tag "Maximum Height"
:value nil
:format "%[MaxHeight%] %v "
(const :tag "None" :format "%t" nil)
(integer :tag "Lines" :size 5))
(choice
:tag "Minimum Height"
:value nil
:format "%[MinHeight%] %v "
(const :tag "None" :format "%t" nil)
(integer :tag "Lines" :size 5))
(choice
:tag "Maximum Width"
:value nil
:format "%[MaxWidth%] %v "
(const :tag "None" :format "%t" nil)
(integer :tag "Columns" :size 5))
(choice
:tag "Minimum Width"
:value nil
:format "%[MinWidth%] %v\n"
(const :tag "None" :format "%t" nil)
(integer :tag "Columns" :size 5)))
:group 'help)
(declare-function x-display-pixel-height "xfns.c" (&optional terminal))
(defun window--sanitize-margin (margin left right)
"Return MARGIN if it's a number between LEFT and RIGHT.
Return 0 otherwise."
(if (and (numberp margin)
(<= left (- right margin)) (<= margin right))
margin
0))
(declare-function tool-bar-height "xdisp.c" (&optional frame pixelwise))
(defun fit-mini-frame-to-buffer (&optional frame)
"Adjust size of minibuffer FRAME to display its contents.
FRAME should be a minibuffer-only frame and defaults to the
selected one. Unlike `fit-frame-to-buffer' FRAME will fit to the
contents of its buffer with any leading or trailing empty lines
included."
(fit-frame-to-buffer-1 frame))
(defun fit-frame-to-buffer (&optional frame max-height min-height max-width min-width only)
"Adjust size of FRAME to display the contents of its buffer exactly.
FRAME can be any live frame and defaults to the selected one.
Fit only if FRAME's root window is live.
MAX-HEIGHT, MIN-HEIGHT, MAX-WIDTH and MIN-WIDTH specify bounds on
the new total size of FRAME's root window. MIN-HEIGHT and
MIN-WIDTH default to the values of `window-min-height' and
`window-min-width' respectively. These arguments are specified
in the canonical character width and height of FRAME.
If the optional argument ONLY is `vertically', resize the frame
vertically only. If ONLY is `horizontally', resize the frame
horizontally only.
The new position and size of FRAME can be additionally determined
by customizing the options `fit-frame-to-buffer-sizes' and
`fit-frame-to-buffer-margins' or setting the corresponding
parameters of FRAME.
Any leading or trailing empty lines of the buffer content are not
considered."
(interactive)
(fit-frame-to-buffer-1 frame max-height min-height max-width min-width only t t))
(defun fit-frame-to-buffer-1 (&optional frame max-height min-height max-width min-width only from to)
"Helper function for `fit-frame-to-buffer'.
FROM and TO are the buffer positions to determine the size to fit
to, see `window-text-pixel-size'. The remaining arguments are as
for `fit-frame-to-buffer'."
(unless (fboundp 'display-monitor-attributes-list)
(user-error "Cannot resize frame in non-graphic Emacs"))
(setq frame (window-normalize-frame frame))
(when (window-live-p (frame-root-window frame))
(let* ((char-width (frame-char-width frame))
(char-height (frame-char-height frame))
;; WINDOW is FRAME's root window.
(window (frame-root-window frame))
(line-height (window-default-line-height window))
(parent (frame-parent frame))
(monitor-attributes
(unless parent
(frame-monitor-attributes frame)))
;; FRAME'S parent or display sizes. Used in connection
;; with margins.
(geometry
(unless parent
(cdr (assq 'geometry monitor-attributes))))
(parent-or-display-width
(if parent
(frame-native-width parent)
(nth 2 geometry)))
(parent-or-display-height
(if parent
(frame-native-height parent)
(nth 3 geometry)))
;; FRAME's parent or workarea sizes. Used when no margins
;; are specified.
(parent-or-workarea
(if parent
`(0 0 ,parent-or-display-width ,parent-or-display-height)
(cdr (assq 'workarea monitor-attributes))))
;; The outer size of FRAME. Needed to calculate the
;; margins around the root window's body that have to
;; remain untouched by fitting.
(outer-edges (frame-edges frame 'outer-edges))
(outer-width (if outer-edges
(- (nth 2 outer-edges) (nth 0 outer-edges))
;; A poor guess.
(frame-pixel-width frame)))
(outer-height (if outer-edges
(- (nth 3 outer-edges) (nth 1 outer-edges))
;; Another poor guess.
(frame-pixel-height frame)))
;; The text size of FRAME. Needed to specify FRAME's
;; text size after the root window's body's new sizes have
;; been calculated.
(text-width (frame-text-width frame))
(text-height (frame-text-height frame))
;; WINDOW's body size.
(body-width (window-body-width window t))
(body-height (window-body-height window t))
;; The difference between FRAME's outer size and WINDOW's
;; body size.
(outer-minus-body-width (- outer-width body-width))
(outer-minus-body-height (- outer-height body-height))
;; The difference between FRAME's text size and WINDOW's
;; body size (these values "should" be positive).
(text-minus-body-width (- text-width body-width))
(text-minus-body-height (- text-height body-height))
;; The current position of FRAME.
(position (frame-position frame))
(left (car position))
(top (cdr position))
;; The margins specified for FRAME. These represent pixel
;; offsets from the left, top, right and bottom edge of the
;; display or FRAME's parent's native rectangle and have to
;; take care of the display's taskbar and other obstacles.
;; If they are unspecified, constrain the resulting frame
;; to its workarea or the parent frame's native rectangle.
(margins (or (frame-parameter frame 'fit-frame-to-buffer-margins)
fit-frame-to-buffer-margins))
;; Convert margins into pixel offsets from the left-top
;; corner of FRAME's display or parent.
(left-margin (if (nth 0 margins)
(window--sanitize-margin
(nth 0 margins) 0 parent-or-display-width)
(nth 0 parent-or-workarea)))
(top-margin (if (nth 1 margins)
(window--sanitize-margin
(nth 1 margins) 0 parent-or-display-height)
(nth 1 parent-or-workarea)))
(right-margin (if (nth 2 margins)
(- parent-or-display-width
(window--sanitize-margin
(nth 2 margins) left-margin
parent-or-display-width))
(+ (nth 0 parent-or-workarea)
(nth 2 parent-or-workarea))))
(bottom-margin (if (nth 3 margins)
(- parent-or-display-height
(window--sanitize-margin
(nth 3 margins) top-margin
parent-or-display-height))
(+ (nth 1 parent-or-workarea)
(nth 3 parent-or-workarea))))
;; Minimum and maximum sizes specified for FRAME.
(sizes (or (frame-parameter frame 'fit-frame-to-buffer-sizes)
fit-frame-to-buffer-sizes))
;; Calculate the minimum and maximum pixel sizes of FRAME
;; from the values provided by the MAX-HEIGHT, MIN-HEIGHT,
;; MAX-WIDTH and MIN-WIDTH arguments or, if these are nil,
;; from those provided by `fit-frame-to-buffer-sizes'.
(max-height
(min
(cond
((numberp max-height) (* max-height line-height))
((numberp (nth 0 sizes)) (* (nth 0 sizes) line-height))
(t parent-or-display-height))
;; The following is the maximum height that fits into the
;; top and bottom margins.
(max (- bottom-margin top-margin outer-minus-body-height))))
(min-height
(cond
((numberp min-height) (* min-height line-height))
((numberp (nth 1 sizes)) (* (nth 1 sizes) line-height))
(t (window-min-size window nil nil t))))
(max-width
(min
(cond
((numberp max-width) (* max-width char-width))
((numberp (nth 2 sizes)) (* (nth 2 sizes) char-width))
(t parent-or-display-width))
;; The following is the maximum width that fits into the
;; left and right margins.
(max (- right-margin left-margin outer-minus-body-width))))
(min-width
(cond
((numberp min-width) (* min-width char-width))
((numberp (nth 3 sizes)) (nth 3 sizes))
(t (window-min-size window t nil t))))
;; Note: Currently, for a new frame the sizes of the header
;; and mode line may be estimated incorrectly
(size
(window-text-pixel-size window from to max-width max-height))
(width (max (car size) min-width))
(height (max (cdr size) min-height)))
;; Don't change height or width when the window's size is fixed
;; in either direction or ONLY forbids it.
(cond
((or (eq window-size-fixed 'width) (eq only 'vertically))
(setq width nil))
((or (eq window-size-fixed 'height) (eq only 'horizontally))
(setq height nil)))
;; Fit width to constraints.
(when width
(unless frame-resize-pixelwise
;; Round to character sizes.
(setq width (* (/ (+ width char-width -1) char-width)
char-width)))
;; The new outer width (in pixels).
(setq outer-width (+ width outer-minus-body-width))
;; Maybe move FRAME to preserve margins.
(let ((right (+ left outer-width)))
(cond
((> right right-margin)
;; Move frame to left.
(setq left (max left-margin (- left (- right right-margin)))))
((< left left-margin)
;; Move frame to right.
(setq left left-margin)))))
;; Fit height to constraints.
(when height
(unless frame-resize-pixelwise
(setq height (* (/ (+ height char-height -1) char-height)
char-height)))
;; The new outer height.
(setq outer-height (+ height outer-minus-body-height))
;; Preserve margins.
(let ((bottom (+ top outer-height)))
(cond
((> bottom bottom-margin)
;; Move frame up.
(setq top (max top-margin (- top (- bottom bottom-margin)))))
((< top top-margin)
;; Move frame down.
(setq top top-margin)))))
;; Apply our changes.
(setq text-width
(if width
(+ width text-minus-body-width)
(frame-text-width frame)))
(setq text-height
(if height
(+ height text-minus-body-height)
(frame-text-height frame)))
(modify-frame-parameters
frame `((left . ,left) (top . ,top)
(width . (text-pixels . ,text-width))
(height . (text-pixels . ,text-height)))))))
(defun fit-window-to-buffer (&optional window max-height min-height max-width min-width preserve-size)
"Adjust size of WINDOW to display its buffer's contents exactly.
WINDOW must be a live window and defaults to the selected one.
If WINDOW is part of a vertical combination, adjust WINDOW's
height. The new height is calculated from the actual height of
the accessible portion of its buffer. The optional argument
MAX-HEIGHT specifies a maximum height and defaults to the height
of WINDOW's frame. The optional argument MIN-HEIGHT specifies a
minimum height and defaults to `window-min-height'. Both
MAX-HEIGHT and MIN-HEIGHT are specified in lines and include mode
and header line and a bottom divider, if any.
If WINDOW is part of a horizontal combination and the value of
the option `fit-window-to-buffer-horizontally' is non-nil, adjust
WINDOW's width. The new width of WINDOW is calculated from the
maximum length of its buffer's lines that follow the current
start position of WINDOW. The optional argument MAX-WIDTH
specifies a maximum width and defaults to the width of WINDOW's
frame. The optional argument MIN-WIDTH specifies a minimum width
and defaults to `window-min-width'. Both MAX-WIDTH and MIN-WIDTH
are specified in columns and include fringes, margins, a
scrollbar and a vertical divider, if any.
Optional argument PRESERVE-SIZE non-nil means to preserve the
size of WINDOW (see `window-preserve-size').
Fit pixelwise if the option `window-resize-pixelwise' is non-nil.
If WINDOW is its frame's root window and the option
`fit-frame-to-buffer' is non-nil, call `fit-frame-to-buffer' to
adjust the frame's size.
Note that even if this function makes WINDOW large enough to show
_all_ parts of its buffer you might not see the first part when
WINDOW was scrolled. If WINDOW is resized horizontally, you will
not see the top of its buffer unless WINDOW starts at its minimum
accessible position."
(interactive)
(setq window (window-normalize-window window t))
(if (eq window (frame-root-window window))
(when fit-frame-to-buffer
;; Fit WINDOW's frame to buffer.
(fit-frame-to-buffer
(window-frame window)
max-height min-height max-width min-width
(and (memq fit-frame-to-buffer '(vertically horizontally))
fit-frame-to-buffer)))
(let* ((pixelwise window-resize-pixelwise)
(frame (window-frame window))
(char-height (frame-char-height frame)))
(cond
;; If WINDOW is vertically combined, try to resize it
;; vertically.
((and (not (eq fit-window-to-buffer-horizontally 'only))
(not (window-size-fixed-p window 'preserved))
(window-combined-p window))
(let* ((line-height (window-default-line-height window))
(total-height (window-size window nil pixelwise))
(min-height
;; Sanitize MIN-HEIGHT.
(if (numberp min-height)
;; Can't get smaller than `window-safe-min-height'.
(max (if pixelwise
(* line-height min-height)
min-height)
(if pixelwise
(window-safe-min-pixel-height window)
window-safe-min-height))
;; Preserve header and mode line if present.
(max (if pixelwise
(* line-height window-min-height)
window-min-height)
(window-min-size window nil window pixelwise))))
(max-height
;; Sanitize MAX-HEIGHT.
(if (numberp max-height)
(min
(+ total-height
(window-max-delta
window nil window nil t nil pixelwise))
(if pixelwise
(* line-height max-height)
(/ (* line-height max-height) line-height)))
(+ total-height (window-max-delta
window nil window nil t nil pixelwise))))
(height (+ (cdr (window-text-pixel-size
window nil t nil (frame-pixel-height frame) t))
(window-scroll-bar-height window)
(window-bottom-divider-width window))))
;; Vertically we always want to fit the entire buffer.
;; WINDOW'S height can't get larger than its frame's pixel
;; height. Its width remains fixed.
;; Round height.
(unless pixelwise
(setq height (/ (+ height char-height -1) char-height)))
(setq height (max min-height (min max-height height)))
(unless (= height total-height)
(window-preserve-size window)
(window-resize-no-error
window (- height total-height) nil window pixelwise)
(when preserve-size
(window-preserve-size window nil t)))))
;; If WINDOW is horizontally combined, try to resize it
;; horizontally.
((and fit-window-to-buffer-horizontally
(not (window-size-fixed-p window t 'preserved))
(window-combined-p window t))
(let* ((char-width (frame-char-width frame))
(total-width (window-size window t pixelwise))
(min-width
;; Sanitize MIN-WIDTH.
(if (numberp min-width)
;; Can't get smaller than `window-safe-min-width'.
(max (if pixelwise
(* char-width min-width)
min-width)
(if pixelwise
(window-safe-min-pixel-width window)
window-safe-min-width))
;; Preserve fringes, margins, scrollbars if present.
(max (if pixelwise
(* char-width window-min-width)
window-min-width)
(window-min-size window nil window pixelwise))))
(max-width
;; Sanitize MAX-WIDTH.
(if (numberp max-width)
(min (+ total-width
(window-max-delta
window t window nil t nil pixelwise))
(if pixelwise
(* char-width max-width)
max-width))
(+ total-width (window-max-delta
window t window nil t nil pixelwise))))
;; When fitting horizontally, assume that WINDOW's
;; start position remains unaltered. WINDOW can't get
;; wider than its frame's pixel width, its height
;; remains unaltered.
(width (+ (car (window-text-pixel-size
window (window-start window) nil
(frame-pixel-width (window-frame window))
;; Add one line-height to assure that
;; we're on the safe side. This
;; overshoots when the first line below
;; the bottom is wider than the window.
(* (window-body-height window pixelwise)
(if pixelwise 1 char-height))))
(- total-width
(window-body-width window pixelwise)))))
(unless pixelwise
(setq width (/ (+ width char-width -1) char-width)))
(setq width (max min-width (min max-width width)))
(unless (= width total-width)
(window-preserve-size window t)
(window-resize-no-error
window (- width total-width) t window pixelwise)
(when preserve-size
(window-preserve-size window t t)))))))))
(defun window-safely-shrinkable-p (&optional window)
"Return t if WINDOW can be shrunk without shrinking other windows.
WINDOW defaults to the selected window."
(with-selected-window (or window (selected-window))
(let ((edges (window-edges)))
(or (= (nth 2 edges) (nth 2 (window-edges (previous-window))))
(= (nth 0 edges) (nth 0 (window-edges (next-window))))))))
(defun shrink-window-if-larger-than-buffer (&optional window)
"Shrink height of WINDOW if its buffer doesn't need so many lines.
More precisely, shrink WINDOW vertically to be as small as
possible, while still showing the full contents of its buffer.
WINDOW must be a live window and defaults to the selected one.
Do not shrink WINDOW to less than `window-min-height' lines. Do
nothing if the buffer contains more lines than the present window
height, or if some of the window's contents are scrolled out of
view, or if shrinking this window would also shrink another
window, or if the window is the only window of its frame.
Return non-nil if the window was shrunk, nil otherwise."
(interactive)
(setq window (window-normalize-window window t))
;; Make sure that WINDOW is vertically combined and `point-min' is
;; visible (for whatever reason that's needed). The remaining issues
;; should be taken care of by `fit-window-to-buffer'.
(when (and (window-combined-p window)
(pos-visible-in-window-p (point-min) window))
(fit-window-to-buffer window (window-total-height window))))
(defun window-largest-empty-rectangle--maximums-1 (quad maximums)
"Support function for `window-largest-empty-rectangle'."
(cond
((null maximums)
(list quad))
((> (car quad) (caar maximums))
(cons quad maximums))
(t
(cons (car maximums)
(window-largest-empty-rectangle--maximums-1 quad (cdr maximums))))))
(defun window-largest-empty-rectangle--maximums (quad maximums count)
"Support function for `window-largest-empty-rectangle'."
(setq maximums (window-largest-empty-rectangle--maximums-1 quad maximums))
(if (> (length maximums) count)
(nbutlast maximums)
maximums))
(defun window-largest-empty-rectangle--disjoint-maximums (maximums count)
"Support function for `window-largest-empty-rectangle'."
(setq maximums (sort maximums (lambda (x y) (> (car x) (car y)))))
(let ((new-length 0)
new-maximums)
(while (and maximums (< new-length count))
(let* ((maximum (car maximums))
(at (nth 2 maximum))
(to (nth 3 maximum)))
(catch 'drop
(dolist (new-maximum new-maximums)
(let ((new-at (nth 2 new-maximum))
(new-to (nth 3 new-maximum)))
(when (if (< at new-at) (> to new-at) (< at new-to))
;; Intersection -> drop.
(throw 'drop nil))))
(setq new-maximums (cons maximum new-maximums))
(setq new-length (1+ new-length)))
(setq maximums (cdr maximums))))
(nreverse new-maximums)))
(defun window-largest-empty-rectangle (&optional window count min-width min-height positions left)
"Return dimensions of largest empty rectangle in WINDOW.
WINDOW must be a live window and defaults to the selected one.
The return value is a triple of the width and the start and end
Y-coordinates of the largest rectangle that can be inscribed into
the empty space (the space not displaying any text) of WINDOW's
text area. The return value is nil if the current glyph matrix
of WINDOW is not up-to-date.
Optional argument COUNT, if non-nil, specifies the maximum number
of rectangles to return. This means that the return value is a
list of triples specifying rectangles with the largest rectangle
first. COUNT can be also a cons cell whose car specifies the
number of rectangles to return and whose cdr, if non-nil, states
that all rectangles returned must be disjoint.
Note that the right edge of any rectangle returned by this
function is the right edge of WINDOW (the left edge if its buffer
displays RTL text).
Optional arguments MIN-WIDTH and MIN-HEIGHT, if non-nil, specify
the minimum width and height of any rectangle returned.
Optional argument POSITIONS, if non-nil, is a cons cell whose car
specifies the uppermost and whose cdr specifies the lowermost
pixel position that must be covered by any rectangle returned.
Note that positions are counted from the start of the text area
of WINDOW.
Optional argument LEFT, if non-nil, means to return values suitable for
buffers displaying right to left text."
;; Process lines as returned by ‘window-lines-pixel-dimensions’.
;; STACK is a stack that contains rows that have yet to be processed.
(let* ((window (window-normalize-window window t))
(disjoint (and (consp count) (cdr count)))
(count (or (and (numberp count) count)
(and (consp count) (numberp (car count)) (car count))))
(rows (window-lines-pixel-dimensions window nil nil t t left))
(rows-at 0)
(max-size 0)
row stack stack-at stack-to
top top-width top-at top-to top-size
max-width max-at max-to maximums)
;; ROWS-AT is the position where the first element of ROWS starts.
;; STACK-AT is the position where the first element of STACK starts.
(while rows
(setq row (car rows))
(if (or (not stack) (>= (car row) (caar stack)))
(progn
(unless stack
(setq stack-at rows-at))
(setq stack (cons row stack))
;; Set ROWS-AT to where the first element of ROWS ends
;; which, after popping ROW, makes it the start position of
;; the next ROW.
(setq rows-at (cdr row))
(setq rows (cdr rows)))
(setq top (car stack))
(setq stack (cdr stack))
(setq top-width (car top))
(setq top-at (if stack (cdar stack) stack-at))
(setq top-to (cdr top))
(setq top-size (* top-width (- top-to top-at)))
(unless (or (and min-width (< top-width min-width))
(and min-height (< (- top-to top-at) min-height))
(and positions
(or (> top-at (car positions))
(< top-to (cdr positions)))))
(if count
(if disjoint
(setq maximums (cons (list top-size top-width top-at top-to)
maximums))
(setq maximums (window-largest-empty-rectangle--maximums
(list top-size top-width top-at top-to)
maximums count)))
(when (> top-size max-size)
(setq max-size top-size)
(setq max-width top-width)
(setq max-at top-at)
(setq max-to top-to))))
(if (and stack (> (caar stack) (car row)))
;; Have new top element of stack include old top.
(setq stack (cons (cons (caar stack) (cdr top)) (cdr stack)))
;; Move rows-at backwards to top-at.
(setq rows-at top-at))))
(when stack
;; STACK-TO is the position where the stack ends.
(setq stack-to (cdar stack))
(while stack
(setq top (car stack))
(setq stack (cdr stack))
(setq top-width (car top))
(setq top-at (if stack (cdar stack) stack-at))
(setq top-size (* top-width (- stack-to top-at)))
(unless (or (and min-width (< top-width min-width))
(and min-height (< (- stack-to top-at) min-height))
(and positions
(or (> top-at (car positions))
(< stack-to (cdr positions)))))
(if count
(if disjoint
(setq maximums (cons (list top-size top-width top-at stack-to)
maximums))
(setq maximums (window-largest-empty-rectangle--maximums
(list top-size top-width top-at stack-to)
maximums count)))
(when (> top-size max-size)
(setq max-size top-size)
(setq max-width top-width)
(setq max-at top-at)
(setq max-to stack-to))))))
(cond
(maximums
(if disjoint
(window-largest-empty-rectangle--disjoint-maximums maximums count)
maximums))
((> max-size 0)
(list max-width max-at max-to)))))
\f
(defun kill-buffer-and-window ()
"Kill the current buffer and delete the selected window."
(interactive)
(let ((window-to-delete (selected-window))
(buffer-to-kill (current-buffer))
(delete-window-hook (lambda () (ignore-errors (delete-window)))))
(unwind-protect
(progn
(add-hook 'kill-buffer-hook delete-window-hook t t)
(if (kill-buffer (current-buffer))
;; If `delete-window' failed before, we rerun it to regenerate
;; the error so it can be seen in the echo area.
(when (eq (selected-window) window-to-delete)
(delete-window))))
;; If the buffer is not dead for some reason (probably because
;; of a `quit' signal), remove the hook again.
(ignore-errors
(with-current-buffer buffer-to-kill
(remove-hook 'kill-buffer-hook delete-window-hook t))))))
\f
;;;
;; Groups of windows (Follow Mode).
;;
;; This section of functions extends the functionality of some window
;; manipulating commands to groups of windows cooperatively
;; displaying a buffer, typically with Follow Mode.
;;
;; The xxx-function variables are permanent locals so that their local
;; status is undone only when explicitly programmed, not when a buffer
;; is reverted or a mode function is called.
(defvar-local window-group-start-function nil)
(put 'window-group-start-function 'permanent-local t)
(defun window-group-start (&optional window)
"Return position at which display currently starts in the group of
windows containing WINDOW. When a grouping mode (such as Follow Mode)
is not active, this function is identical to `window-start'.
WINDOW must be a live window and defaults to the selected one.
This is updated by redisplay or by calling `set-window*-start'."
(if (functionp window-group-start-function)
(funcall window-group-start-function window)
(window-start window)))
(defvar-local window-group-end-function nil)
(put 'window-group-end-function 'permanent-local t)
(defun window-group-end (&optional window update)
"Return position at which display currently ends in the group of
windows containing WINDOW. When a grouping mode (such as Follow Mode)
is not active, this function is identical to `window-end'.
WINDOW must be a live window and defaults to the selected one.
This is updated by redisplay, when it runs to completion.
Simply changing the buffer text or setting `window-group-start'
does not update this value.
Return nil if there is no recorded value. (This can happen if the
last redisplay of WINDOW was preempted, and did not finish.)
If UPDATE is non-nil, compute the up-to-date position
if it isn't already recorded."
(if (functionp window-group-end-function)
(funcall window-group-end-function window update)
(window-end window update)))
(defvar-local set-window-group-start-function nil)
(put 'set-window-group-start-function 'permanent-local t)
(defun set-window-group-start (window pos &optional noforce)
"Make display in the group of windows containing WINDOW start at
position POS in WINDOW's buffer. When a grouping mode (such as Follow
Mode) is not active, this function is identical to `set-window-start'.
WINDOW must be a live window and defaults to the selected one. Return
POS. Optional third arg NOFORCE non-nil inhibits next redisplay from
overriding motion of point in order to display at this exact start."
(if (functionp set-window-group-start-function)
(funcall set-window-group-start-function window pos noforce)
(set-window-start window pos noforce)))
(defvar-local recenter-window-group-function nil)
(put 'recenter-window-group-function 'permanent-local t)
(defun recenter-window-group (&optional arg)
"Center point in the group of windows containing the selected window
and maybe redisplay frame. When a grouping mode (such as Follow Mode)
is not active, this function is identical to `recenter'.
With a numeric prefix argument ARG, recenter putting point on screen line ARG
relative to the first window in the selected window group. If ARG is
negative, it counts up from the bottom of the last window in the
group. (ARG should be less than the total height of the window group.)
If ARG is omitted or nil, then recenter with point on the middle line of
the selected window group; if the variable `recenter-redisplay' is
non-nil, also erase the entire frame and redraw it (when
`auto-resize-tool-bars' is set to `grow-only', this resets the
tool-bar's height to the minimum height needed); if
`recenter-redisplay' has the special value `tty', then only tty frames
are redrawn.
Just \\[universal-argument] as prefix means put point in the center of the window
and redisplay normally--don't erase and redraw the frame."
(if (functionp recenter-window-group-function)
(funcall recenter-window-group-function arg)
(recenter arg)))
(defvar-local pos-visible-in-window-group-p-function nil)
(put 'pos-visible-in-window-group-p-function 'permanent-local t)
(defun pos-visible-in-window-group-p (&optional pos window partially)
"Return non-nil if position POS is currently on the frame in the
window group containing WINDOW. When a grouping mode (such as Follow
Mode) is not active, this function is identical to
`pos-visible-in-window-p'.
WINDOW must be a live window and defaults to the selected one.
Return nil if that position is scrolled vertically out of view. If a
character is only partially visible, nil is returned, unless the
optional argument PARTIALLY is non-nil. If POS is only out of view
because of horizontal scrolling, return non-nil. If POS is t, it
specifies the position of the last visible glyph in the window group.
POS defaults to point in WINDOW; WINDOW defaults to the selected
window.
If POS is visible, return t if PARTIALLY is nil; if PARTIALLY is non-nil,
the return value is a list of 2 or 6 elements (X Y [RTOP RBOT ROWH VPOS]),
where X and Y are the pixel coordinates relative to the top left corner
of the window. The remaining elements are omitted if the character after
POS is fully visible; otherwise, RTOP and RBOT are the number of pixels
off-window at the top and bottom of the screen line (\"row\") containing
POS, ROWH is the visible height of that row, and VPOS is the row number
\(zero-based)."
(if (functionp pos-visible-in-window-group-p-function)
(funcall pos-visible-in-window-group-p-function pos window partially)
(pos-visible-in-window-p pos window partially)))
(defvar-local selected-window-group-function nil)
(put 'selected-window-group-function 'permanent-local t)
(defun selected-window-group ()
"Return the list of windows in the group containing the selected window.
When a grouping mode (such as Follow Mode) is not active, the
result is a list containing only the selected window."
(if (functionp selected-window-group-function)
(funcall selected-window-group-function)
(list (selected-window))))
(defvar-local move-to-window-group-line-function nil)
(put 'move-to-window-group-line-function 'permanent-local t)
(defun move-to-window-group-line (arg)
"Position point relative to the current group of windows.
When a grouping mode (such as Follow Mode) is not active, this
function is identical to `move-to-window-line'.
ARG nil means position point at center of the window group.
Else, ARG specifies the vertical position within the window
group; zero means top of first window in the group, negative
means relative to the bottom of the last window in the group."
(if (functionp move-to-window-group-line-function)
(funcall move-to-window-group-line-function arg)
(move-to-window-line arg)))
\f
(defvar recenter-last-op nil
"Indicates the last recenter operation performed.
Possible values: `top', `middle', `bottom', integer or float numbers.
It can also be nil, which means the first value in `recenter-positions'.")
(defcustom recenter-positions '(middle top bottom)
"Cycling order for `recenter-top-bottom'.
A list of elements with possible values `top', `middle', `bottom',
integer or float numbers that define the cycling order for
the command `recenter-top-bottom'.
Top and bottom destinations are `scroll-margin' lines from the true
window top and bottom. Middle redraws the frame and centers point
vertically within the window. Integer number moves current line to
the specified absolute window-line. Float number between 0.0 and 1.0
means the percentage of the screen space from the top. The default
cycling order is middle -> top -> bottom."
:type '(repeat (choice
(const :tag "Top" top)
(const :tag "Middle" middle)
(const :tag "Bottom" bottom)
(integer :tag "Line number")
(float :tag "Percentage")))
:version "23.2"
:group 'windows)
(defun recenter-top-bottom (&optional arg)
"Scroll the window so that current line is in the middle of the window.
Successive invocations scroll the window in a cyclical order to put
the current line at certain places within the window, as determined by
`recenter-positions'. By default, the second invocation puts the
current line at the top-most window line, the third invocation puts it
on the bottom-most window line, and then the order is reused in a
cyclical manner.
With numeric prefix ARG, move current line ARG lines below the window top.
With plain \\[universal-argument], move current line to window center."
(interactive "P")
(cond
(arg (recenter arg t)) ; Always respect ARG.
(t
(setq recenter-last-op
(if (eq this-command last-command)
(car (or (cdr (member recenter-last-op recenter-positions))
recenter-positions))
(car recenter-positions)))
(let ((this-scroll-margin
(min (max 0 scroll-margin)
(truncate (/ (window-body-height) 4.0)))))
(cond ((eq recenter-last-op 'middle)
(recenter nil t))
((eq recenter-last-op 'top)
(recenter this-scroll-margin t))
((eq recenter-last-op 'bottom)
(recenter (- -1 this-scroll-margin) t))
((integerp recenter-last-op)
(recenter recenter-last-op t))
((floatp recenter-last-op)
(recenter (round (* recenter-last-op (window-height))) t)))))))
(define-key global-map [?\C-l] 'recenter-top-bottom)
(defun recenter-other-window (&optional arg)
"Call `recenter-top-bottom' in the other window.
A prefix argument is handled like `recenter':
With numeric prefix ARG, move current line to window-line ARG.
With plain \\[universal-argument], move current line to window center."
(interactive "P")
(with-selected-window (other-window-for-scrolling)
(recenter-top-bottom arg)
(pulse-momentary-highlight-one-line (point))))
(define-key global-map [?\S-\M-\C-l] 'recenter-other-window)
(defun move-to-window-line-top-bottom (&optional arg)
"Position point relative to window.
With a prefix argument ARG, acts like `move-to-window-line'.
With no argument, positions point at center of window.
Successive calls position point at positions defined
by `recenter-positions'."
(interactive "P")
(cond
(arg (move-to-window-line arg)) ; Always respect ARG.
(t
(setq recenter-last-op
(if (eq this-command last-command)
(car (or (cdr (member recenter-last-op recenter-positions))
recenter-positions))
(car recenter-positions)))
(let ((this-scroll-margin
(min (max 0 scroll-margin)
(truncate (/ (window-body-height) 4.0)))))
(cond ((eq recenter-last-op 'middle)
(call-interactively 'move-to-window-line))
((eq recenter-last-op 'top)
(move-to-window-line this-scroll-margin))
((eq recenter-last-op 'bottom)
(move-to-window-line (- -1 this-scroll-margin)))
((integerp recenter-last-op)
(move-to-window-line recenter-last-op))
((floatp recenter-last-op)
(move-to-window-line (round (* recenter-last-op (window-height))))))))))
(define-key global-map [?\M-r] 'move-to-window-line-top-bottom)
\f
;;; Scrolling commands.
;;; Scrolling commands which do not signal errors at top/bottom
;;; of buffer at first key-press (instead move to top/bottom
;;; of buffer).
(defcustom scroll-error-top-bottom nil
"Move point to top/bottom of buffer before signaling a scrolling error.
A value of nil means just signal an error if no more scrolling possible.
A value of t means point moves to the beginning or the end of the buffer
\(depending on scrolling direction) when no more scrolling possible.
When point is already on that position, then signal an error."
:type 'boolean
:group 'windows
:version "24.1")
(defun scroll-up-command (&optional arg)
"Scroll text of selected window upward ARG lines; or near full screen if no ARG.
If `scroll-error-top-bottom' is non-nil and `scroll-up' cannot
scroll window further, move cursor to the bottom line.
When point is already on that position, then signal an error.
A near full screen is `next-screen-context-lines' less than a full screen.
Negative ARG means scroll downward.
If ARG is the atom `-', scroll downward by nearly full screen."
(interactive "^P")
(cond
((null scroll-error-top-bottom)
(scroll-up arg))
((eq arg '-)
(scroll-down-command nil))
((< (prefix-numeric-value arg) 0)
(scroll-down-command (- (prefix-numeric-value arg))))
((eobp)
(scroll-up arg)) ; signal error
(t
(condition-case nil
(scroll-up arg)
(end-of-buffer
(if arg
;; When scrolling by ARG lines can't be done,
;; move by ARG lines instead.
(forward-line arg)
;; When ARG is nil for full-screen scrolling,
;; move to the bottom of the buffer.
(goto-char (point-max))))))))
(put 'scroll-up-command 'scroll-command t)
(defun scroll-down-command (&optional arg)
"Scroll text of selected window down ARG lines; or near full screen if no ARG.
If `scroll-error-top-bottom' is non-nil and `scroll-down' cannot
scroll window further, move cursor to the top line.
When point is already on that position, then signal an error.
A near full screen is `next-screen-context-lines' less than a full screen.
Negative ARG means scroll upward.
If ARG is the atom `-', scroll upward by nearly full screen."
(interactive "^P")
(cond
((null scroll-error-top-bottom)
(scroll-down arg))
((eq arg '-)
(scroll-up-command nil))
((< (prefix-numeric-value arg) 0)
(scroll-up-command (- (prefix-numeric-value arg))))
((bobp)
(scroll-down arg)) ; signal error
(t
(condition-case nil
(scroll-down arg)
(beginning-of-buffer
(if arg
;; When scrolling by ARG lines can't be done,
;; move by ARG lines instead.
(forward-line (- arg))
;; When ARG is nil for full-screen scrolling,
;; move to the top of the buffer.
(goto-char (point-min))))))))
(put 'scroll-down-command 'scroll-command t)
;;; Scrolling commands which scroll a line instead of full screen.
(defun scroll-up-line (&optional arg)
"Scroll text of selected window upward ARG lines; or one line if no ARG.
If ARG is omitted or nil, scroll upward by one line.
This is different from `scroll-up-command' that scrolls a full screen."
(interactive "p")
(scroll-up (or arg 1)))
(put 'scroll-up-line 'scroll-command t)
(defun scroll-down-line (&optional arg)
"Scroll text of selected window down ARG lines; or one line if no ARG.
If ARG is omitted or nil, scroll down by one line.
This is different from `scroll-down-command' that scrolls a full screen."
(interactive "p")
(scroll-down (or arg 1)))
(put 'scroll-down-line 'scroll-command t)
\f
(defun beginning-of-buffer-other-window (arg)
"Move point to the beginning of the buffer in the other window.
Leave mark at previous position.
With arg N, put point N/10 of the way from the true beginning."
(interactive "P")
(with-selected-window (other-window-for-scrolling)
;; Set point and mark in that window's buffer.
(with-no-warnings
(beginning-of-buffer arg))
;; Set point accordingly.
(recenter '(t))))
(defun end-of-buffer-other-window (arg)
"Move point to the end of the buffer in the other window.
Leave mark at previous position.
With arg N, put point N/10 of the way from the true end."
(interactive "P")
;; See beginning-of-buffer-other-window for comments.
(with-selected-window (other-window-for-scrolling)
(with-no-warnings
(end-of-buffer arg))
(recenter '(t))))
\f
(defvar mouse-autoselect-window-timer nil
"Timer used by delayed window autoselection.")
(defvar mouse-autoselect-window-position-1 nil
"First mouse position recorded by delayed window autoselection.")
(defvar mouse-autoselect-window-position nil
"Last mouse position recorded by delayed window autoselection.")
(defvar mouse-autoselect-window-window nil
"Last window recorded by delayed window autoselection.")
(defvar mouse-autoselect-window-state nil
"When non-nil, special state of delayed window autoselection.
Possible values are `suspend' (suspend autoselection after a menu or
scrollbar interaction) and `select' (the next invocation of
`handle-select-window' shall select the window immediately).")
(defun mouse-autoselect-window-cancel (&optional force)
"Cancel delayed window autoselection.
Optional argument FORCE means cancel unconditionally."
(unless (and (not force)
;; Don't cancel for select-window or select-frame events
;; or when the user drags a scroll bar.
(or (memq this-command
'(handle-select-window handle-switch-frame))
(and (eq this-command 'scroll-bar-toolkit-scroll)
(memq (nth 4 (event-end last-input-event))
'(handle end-scroll)))))
(setq mouse-autoselect-window-state nil)
(setq mouse-autoselect-window-position-1 nil)
(when (timerp mouse-autoselect-window-timer)
(cancel-timer mouse-autoselect-window-timer))
(remove-hook 'pre-command-hook 'mouse-autoselect-window-cancel)))
(defun mouse-autoselect-window-start (mouse-position &optional window suspend)
"Start delayed window autoselection.
MOUSE-POSITION is the last position where the mouse was seen as returned
by `mouse-position'. Optional argument WINDOW non-nil denotes the
window where the mouse was seen. Optional argument SUSPEND non-nil
means suspend autoselection."
;; Record values for MOUSE-POSITION, WINDOW, and SUSPEND.
(setq mouse-autoselect-window-position mouse-position)
(when window (setq mouse-autoselect-window-window window))
(setq mouse-autoselect-window-state (when suspend 'suspend))
;; Install timer which runs `mouse-autoselect-window-select' after
;; `mouse-autoselect-window' seconds.
(setq mouse-autoselect-window-timer
(run-at-time
(abs mouse-autoselect-window) nil 'mouse-autoselect-window-select)))
(defun mouse-autoselect-window-select ()
"Select window with delayed window autoselection.
If the mouse position has stabilized in a non-selected window, select
that window. The minibuffer window is selected only if the minibuffer
is active. This function is run by `mouse-autoselect-window-timer'."
(let* ((mouse-position (mouse-position))
(mouse-x (and (numberp (cadr mouse-position))
(cadr mouse-position)))
(mouse-y (and (numberp (cddr mouse-position))
(cddr mouse-position)))
(frame (and mouse-x mouse-y (car mouse-position)))
(window (and frame (window-at mouse-x mouse-y frame))))
(cond
((or (and (fboundp 'menu-or-popup-active-p) (menu-or-popup-active-p))
(and window
(let ((coords (coordinates-in-window-p
(cdr mouse-position) window)))
(and (not (consp coords))
(not (memq coords '(left-margin right-margin)))))))
;; A menu / popup dialog is active or the mouse is not on the
;; text region of WINDOW: Suspend autoselection temporarily.
(mouse-autoselect-window-start mouse-position nil t))
((or (eq mouse-autoselect-window-state 'suspend)
;; When the mouse is at its first recorded position, restart
;; delayed autoselection. This works around a scenario with
;; two two-window frames with identical dimensions: select the
;; first window of the first frame, switch to the second
;; frame, move the mouse to its second window, minimize the
;; second frame. Now the second window of the first frame
;; gets selected although the mouse never really "moved" into
;; that window.
(and (numberp mouse-autoselect-window)
(equal (mouse-position) mouse-autoselect-window-position-1)))
;; Delayed autoselection was temporarily suspended, reenable it.
(mouse-autoselect-window-start mouse-position))
((and window
(or (not (numberp mouse-autoselect-window))
(and (>= mouse-autoselect-window 0)
;; If `mouse-autoselect-window' is non-negative,
;; select window if it's the same as before.
(eq window mouse-autoselect-window-window))
;; Otherwise select window iff the mouse is at the same
;; position as before. Observe that the first test
;; after starting autoselection usually fails since the
;; value of `mouse-autoselect-window-position' recorded
;; there is the position where the mouse has entered the
;; new window and not necessarily where the mouse has
;; stopped moving.
(equal mouse-position mouse-autoselect-window-position))
;; The minibuffer is a candidate window if it's active.
(or (not (window-minibuffer-p window))
(eq window (active-minibuffer-window))))
;; Mouse position has stabilized in non-selected window: Cancel
;; delayed autoselection and try to select that window.
(mouse-autoselect-window-cancel t)
;; Use `unread-command-events' in order to execute pre- and
;; post-command hooks and trigger idle timers. To avoid delaying
;; autoselection again, set `mouse-autoselect-window-state'."
(setq mouse-autoselect-window-state 'select)
(setq unread-command-events
(cons (list 'select-window (list window))
unread-command-events)))
((or (not (numberp mouse-autoselect-window))
(equal mouse-position mouse-autoselect-window-position))
;; Mouse position has stabilized at
;; `mouse-autoselect-window-position': Cancel delayed
;; autoselection.
(mouse-autoselect-window-cancel t))
(window
;; Mouse position has not stabilized yet, resume delayed
;; autoselection.
(mouse-autoselect-window-start mouse-position window)))))
(declare-function display-multi-frame-p "frame" (&optional display))
(defun handle-select-window (event)
"Handle select-window events."
(interactive "^e")
(let* ((window (posn-window (event-start event)))
(frame (and (window-live-p window) (window-frame window)))
(old-frame (selected-frame)))
(unless (or (not (window-live-p window))
;; Don't switch when autoselection shall be delayed.
(and (numberp mouse-autoselect-window)
(not (eq mouse-autoselect-window-state 'select))
(let ((position (mouse-position)))
;; Cancel any delayed autoselection.
(mouse-autoselect-window-cancel t)
;; Start delayed autoselection from current mouse
;; position and window.
(setq mouse-autoselect-window-position-1 position)
(mouse-autoselect-window-start position window)
;; Executing a command cancels delayed autoselection.
(add-hook
'pre-command-hook 'mouse-autoselect-window-cancel)))
;; Don't switch to a `no-accept-focus' frame unless it's
;; already selected.
(and (not (eq frame (selected-frame)))
(frame-parameter frame 'no-accept-focus))
;; Don't switch if window autoselection with mouse is active
;; and minibuffer window is selected.
(and mouse-autoselect-window (window-minibuffer-p))
;; Don't switch to minibuffer window unless it's active.
(and (window-minibuffer-p window)
(not (minibuffer-window-active-p window))))
;; Reset state of delayed autoselection.
(setq mouse-autoselect-window-state nil)
;; Run `mouse-leave-buffer-hook' when autoselecting window.
(run-hooks 'mouse-leave-buffer-hook)
;; Clear echo area.
(message nil)
;; Select the window before giving the frame focus since otherwise
;; we might get two windows with an active cursor.
(select-window window)
(cond
((or (not (display-multi-frame-p))
(not focus-follows-mouse)
;; Focus FRAME if it's either a child frame or an ancestor
;; of the frame switched from.
(and (not (frame-parameter frame 'parent-frame))
(not (frame-ancestor-p frame old-frame)))))
((eq focus-follows-mouse 'auto-raise)
;; Focus and auto-raise frame.
(x-focus-frame frame)
;; This doesn't seem to work when we move from a normal frame
;; right into the child frame of another frame - we should raise
;; that child frame's ancestor frame first ...
(raise-frame frame))
(t
;; Just focus frame.
(x-focus-frame frame t))))))
(defun truncated-partial-width-window-p (&optional window)
"Return non-nil if lines in WINDOW are specifically truncated due to its width.
WINDOW must be a live window and defaults to the selected one.
Return nil if WINDOW is not a partial-width window
(regardless of the value of `truncate-lines').
Otherwise, consult the value of `truncate-partial-width-windows'
for the buffer shown in WINDOW."
(setq window (window-normalize-window window t))
(unless (window-full-width-p window)
(let ((t-p-w-w (buffer-local-value 'truncate-partial-width-windows
(window-buffer window))))
(if (integerp t-p-w-w)
(< (window-width window) t-p-w-w)
t-p-w-w))))
\f
;; Automatically inform subprocesses of changes to window size.
(defcustom window-adjust-process-window-size-function
'window-adjust-process-window-size-smallest
"Control how Emacs chooses inferior process window sizes.
Emacs uses this function to tell processes the space they have
available for displaying their output. After each window
configuration change, Emacs calls the value of
`window-adjust-process-window-size-function' for each process
with a buffer being displayed in at least one window.
This function is responsible for combining the sizes of the
displayed windows and returning a cons (WIDTH . HEIGHT)
describing the width and height with which Emacs will call
`set-process-window-size' for that process. If the function
returns nil, Emacs does not call `set-process-window-size'.
This function is called with the process buffer as the current
buffer and with two arguments: the process and a list of windows
displaying process. Modes can make this variable buffer-local;
additionally, the `adjust-window-size-function' process property
overrides the global or buffer-local value of
`window-adjust-process-window-size-function'."
:type '(choice
(const :tag "Minimum area of any window"
window-adjust-process-window-size-smallest)
(const :tag "Maximum area of any window"
window-adjust-process-window-size-largest)
(const :tag "Do not adjust process window sizes" ignore)
function)
:group 'windows
:version "25.1")
(defun window-adjust-process-window-size (reducer windows)
"Adjust the window sizes of a process.
WINDOWS is a list of windows associated with that process. REDUCER is
a two-argument function used to combine the widths and heights of
the given windows."
(when windows
(let ((width (window-max-chars-per-line (car windows)))
(height (with-selected-window (car windows)
(floor (window-screen-lines)))))
(dolist (window (cdr windows))
(setf width (funcall reducer width (window-max-chars-per-line window)))
(setf height (funcall reducer height (with-selected-window window
(floor (window-screen-lines))))))
(cons width height))))
(defun window-adjust-process-window-size-smallest (_process windows)
"Adjust the process window size of PROCESS.
WINDOWS is a list of windows associated with PROCESS. Choose the
smallest area available for displaying PROCESS's output."
(window-adjust-process-window-size #'min windows))
(defun window-adjust-process-window-size-largest (_process windows)
"Adjust the process window size of PROCESS.
WINDOWS is a list of windows associated with PROCESS. Choose the
largest area available for displaying PROCESS's output."
(window-adjust-process-window-size #'max windows))
(defun window--process-window-list ()
"Return an alist mapping processes to associated windows.
A window is associated with a process if that window is
displaying that processes's buffer."
(let ((processes (process-list))
(process-windows nil))
(if processes
(walk-windows
(lambda (window)
(let ((buffer (window-buffer window))
(iter processes))
(while (let ((process (car iter)))
(if (and (process-live-p process)
(eq buffer (process-buffer process)))
(let ((procwin (assq process process-windows)))
;; Add this window to the list of windows
;; displaying process.
(if procwin
(push window (cdr procwin))
(push (list process window) process-windows))
;; We found our process for this window, so
;; stop iterating over the process list.
nil)
(setf iter (cdr iter)))))))
1 t))
process-windows))
(defun window--adjust-process-windows ()
"Update process window sizes to match the current window configuration."
(when (fboundp 'process-list)
(dolist (procwin (window--process-window-list))
(let ((process (car procwin)))
(with-demoted-errors "Error adjusting window size: %S"
(with-current-buffer (process-buffer process)
(let ((size (funcall
(or (process-get process 'adjust-window-size-function)
window-adjust-process-window-size-function)
process (cdr procwin))))
(when size
(set-process-window-size process (cdr size) (car size))))))))))
(add-hook 'window-configuration-change-hook 'window--adjust-process-windows)
\f
;; Some of these are in tutorial--default-keys, so update that if you
;; change these.
(define-key ctl-x-map "0" 'delete-window)
(define-key ctl-x-map "1" 'delete-other-windows)
(define-key ctl-x-map "2" 'split-window-below)
(define-key ctl-x-map "3" 'split-window-right)
(define-key ctl-x-map "o" 'other-window)
(define-key ctl-x-map "^" 'enlarge-window)
(define-key ctl-x-map "}" 'enlarge-window-horizontally)
(define-key ctl-x-map "{" 'shrink-window-horizontally)
(define-key ctl-x-map "-" 'shrink-window-if-larger-than-buffer)
(define-key ctl-x-map "+" 'balance-windows)
(define-key ctl-x-4-map "0" 'kill-buffer-and-window)
(define-key ctl-x-4-map "1" 'same-window-prefix)
(define-key ctl-x-4-map "4" 'other-window-prefix)
(defvar other-window-repeat-map
(let ((map (make-sparse-keymap)))
(define-key map "o" 'other-window)
(define-key map "O" (lambda ()
(interactive)
(setq repeat-map 'other-window-repeat-map)
(other-window -1)))
map)
"Keymap to repeat `other-window' key sequences. Used in `repeat-mode'.")
(put 'other-window 'repeat-map 'other-window-repeat-map)
(defvar resize-window-repeat-map
(let ((map (make-sparse-keymap)))
;; Standard keys:
(define-key map "^" 'enlarge-window)
(define-key map "}" 'enlarge-window-horizontally)
(define-key map "{" 'shrink-window-horizontally)
;; Additional keys:
(define-key map "v" 'shrink-window)
map)
"Keymap to repeat window resizing commands. Used in `repeat-mode'.")
(put 'enlarge-window 'repeat-map 'resize-window-repeat-map)
(put 'enlarge-window-horizontally 'repeat-map 'resize-window-repeat-map)
(put 'shrink-window-horizontally 'repeat-map 'resize-window-repeat-map)
(put 'shrink-window 'repeat-map 'resize-window-repeat-map)
(provide 'window)
;;; window.el ends here
|