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
| | ;;; subr.el --- basic lisp subroutines for Emacs -*- coding: utf-8; lexical-binding:t -*-
;; Copyright (C) 1985-1986, 1992, 1994-1995, 1999-2015 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 <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
;; Beware: while this file has tag `utf-8', before it's compiled, it gets
;; loaded as "raw-text", so non-ASCII chars won't work right during bootstrap.
(defmacro declare-function (_fn _file &optional _arglist _fileonly)
"Tell the byte-compiler that function FN is defined, in FILE.
Optional ARGLIST is the argument list used by the function.
The FILE argument is not used by the byte-compiler, but by the
`check-declare' package, which checks that FILE contains a
definition for FN. ARGLIST is used by both the byte-compiler
and `check-declare' to check for consistency.
FILE can be either a Lisp file (in which case the \".el\"
extension is optional), or a C file. C files are expanded
relative to the Emacs \"src/\" directory. Lisp files are
searched for using `locate-library', and if that fails they are
expanded relative to the location of the file containing the
declaration. A FILE with an \"ext:\" prefix is an external file.
`check-declare' will check such files if they are found, and skip
them without error if they are not.
FILEONLY non-nil means that `check-declare' will only check that
FILE exists, not that it defines FN. This is intended for
function-definitions that `check-declare' does not recognize, e.g.
`defstruct'.
To specify a value for FILEONLY without passing an argument list,
set ARGLIST to t. This is necessary because nil means an
empty argument list, rather than an unspecified one.
Note that for the purposes of `check-declare', this statement
must be the first non-whitespace on a line.
For more information, see Info node `(elisp)Declaring Functions'."
;; Does nothing - byte-compile-declare-function does the work.
nil)
\f
;;;; Basic Lisp macros.
(defalias 'not 'null)
(defmacro noreturn (form)
"Evaluate FORM, expecting it not to return.
If FORM does return, signal an error."
(declare (debug t))
`(prog1 ,form
(error "Form marked with `noreturn' did return")))
(defmacro 1value (form)
"Evaluate FORM, expecting a constant return value.
This is the global do-nothing version. There is also `testcover-1value'
that complains if FORM ever does return differing values."
(declare (debug t))
form)
(defmacro def-edebug-spec (symbol spec)
"Set the `edebug-form-spec' property of SYMBOL according to SPEC.
Both SYMBOL and SPEC are unevaluated. The SPEC can be:
0 (instrument no arguments); t (instrument all arguments);
a symbol (naming a function with an Edebug specification); or a list.
The elements of the list describe the argument types; see
Info node `(elisp)Specification List' for details."
`(put (quote ,symbol) 'edebug-form-spec (quote ,spec)))
(defmacro lambda (&rest cdr)
"Return a lambda expression.
A call of the form (lambda ARGS DOCSTRING INTERACTIVE BODY) is
self-quoting; the result of evaluating the lambda expression is the
expression itself. The lambda expression may then be treated as a
function, i.e., stored as the function value of a symbol, passed to
`funcall' or `mapcar', etc.
ARGS should take the same form as an argument list for a `defun'.
DOCSTRING is an optional documentation string.
If present, it should describe how to call the function.
But documentation strings are usually not useful in nameless functions.
INTERACTIVE should be a call to the function `interactive', which see.
It may also be omitted.
BODY should be a list of Lisp expressions.
\(fn ARGS [DOCSTRING] [INTERACTIVE] BODY)"
(declare (doc-string 2) (indent defun)
(debug (&define lambda-list
[&optional stringp]
[&optional ("interactive" interactive)]
def-body)))
;; Note that this definition should not use backquotes; subr.el should not
;; depend on backquote.el.
(list 'function (cons 'lambda cdr)))
(defmacro setq-local (var val)
"Set variable VAR to value VAL in current buffer."
;; Can't use backquote here, it's too early in the bootstrap.
(list 'set (list 'make-local-variable (list 'quote var)) val))
(defmacro defvar-local (var val &optional docstring)
"Define VAR as a buffer-local variable with default value VAL.
Like `defvar' but additionally marks the variable as being automatically
buffer-local wherever it is set."
(declare (debug defvar) (doc-string 3))
;; Can't use backquote here, it's too early in the bootstrap.
(list 'progn (list 'defvar var val docstring)
(list 'make-variable-buffer-local (list 'quote var))))
(defun apply-partially (fun &rest args)
"Return a function that is a partial application of FUN to ARGS.
ARGS is a list of the first N arguments to pass to FUN.
The result is a new function which does the same as FUN, except that
the first N arguments are fixed at the values with which this function
was called."
(lambda (&rest args2)
(apply fun (append args args2))))
(defmacro push (newelt place)
"Add NEWELT to the list stored in the generalized variable PLACE.
This is morally equivalent to (setf PLACE (cons NEWELT PLACE)),
except that PLACE is only evaluated once (after NEWELT)."
(declare (debug (form gv-place)))
(if (symbolp place)
;; Important special case, to avoid triggering GV too early in
;; the bootstrap.
(list 'setq place
(list 'cons newelt place))
(require 'macroexp)
(macroexp-let2 macroexp-copyable-p v newelt
(gv-letplace (getter setter) place
(funcall setter `(cons ,v ,getter))))))
(defmacro pop (place)
"Return the first element of PLACE's value, and remove it from the list.
PLACE must be a generalized variable whose value is a list.
If the value is nil, `pop' returns nil but does not actually
change the list."
(declare (debug (gv-place)))
;; We use `car-safe' here instead of `car' because the behavior is the same
;; (if it's not a cons cell, the `cdr' would have signaled an error already),
;; but `car-safe' is total, so the byte-compiler can safely remove it if the
;; result is not used.
`(car-safe
,(if (symbolp place)
;; So we can use `pop' in the bootstrap before `gv' can be used.
(list 'prog1 place (list 'setq place (list 'cdr place)))
(gv-letplace (getter setter) place
(macroexp-let2 macroexp-copyable-p x getter
`(prog1 ,x ,(funcall setter `(cdr ,x))))))))
(defmacro when (cond &rest body)
"If COND yields non-nil, do BODY, else return nil.
When COND yields non-nil, eval BODY forms sequentially and return
value of last one, or nil if there are none.
\(fn COND BODY...)"
(declare (indent 1) (debug t))
(list 'if cond (cons 'progn body)))
(defmacro unless (cond &rest body)
"If COND yields nil, do BODY, else return nil.
When COND yields nil, eval BODY forms sequentially and return
value of last one, or nil if there are none.
\(fn COND BODY...)"
(declare (indent 1) (debug t))
(cons 'if (cons cond (cons nil body))))
(defmacro dolist (spec &rest body)
"Loop over a list.
Evaluate BODY with VAR bound to each car from LIST, in turn.
Then evaluate RESULT to get return value, default nil.
\(fn (VAR LIST [RESULT]) BODY...)"
(declare (indent 1) (debug ((symbolp form &optional form) body)))
;; It would be cleaner to create an uninterned symbol,
;; but that uses a lot more space when many functions in many files
;; use dolist.
;; FIXME: This cost disappears in byte-compiled lexical-binding files.
(let ((temp '--dolist-tail--))
;; This is not a reliable test, but it does not matter because both
;; semantics are acceptable, tho one is slightly faster with dynamic
;; scoping and the other is slightly faster (and has cleaner semantics)
;; with lexical scoping.
(if lexical-binding
`(let ((,temp ,(nth 1 spec)))
(while ,temp
(let ((,(car spec) (car ,temp)))
,@body
(setq ,temp (cdr ,temp))))
,@(cdr (cdr spec)))
`(let ((,temp ,(nth 1 spec))
,(car spec))
(while ,temp
(setq ,(car spec) (car ,temp))
,@body
(setq ,temp (cdr ,temp)))
,@(if (cdr (cdr spec))
`((setq ,(car spec) nil) ,@(cdr (cdr spec))))))))
(defmacro dotimes (spec &rest body)
"Loop a certain number of times.
Evaluate BODY with VAR bound to successive integers running from 0,
inclusive, to COUNT, exclusive. Then evaluate RESULT to get
the return value (nil if RESULT is omitted).
\(fn (VAR COUNT [RESULT]) BODY...)"
(declare (indent 1) (debug dolist))
;; It would be cleaner to create an uninterned symbol,
;; but that uses a lot more space when many functions in many files
;; use dotimes.
;; FIXME: This cost disappears in byte-compiled lexical-binding files.
(let ((temp '--dotimes-limit--)
(start 0)
(end (nth 1 spec)))
;; This is not a reliable test, but it does not matter because both
;; semantics are acceptable, tho one is slightly faster with dynamic
;; scoping and the other has cleaner semantics.
(if lexical-binding
(let ((counter '--dotimes-counter--))
`(let ((,temp ,end)
(,counter ,start))
(while (< ,counter ,temp)
(let ((,(car spec) ,counter))
,@body)
(setq ,counter (1+ ,counter)))
,@(if (cddr spec)
;; FIXME: This let often leads to "unused var" warnings.
`((let ((,(car spec) ,counter)) ,@(cddr spec))))))
`(let ((,temp ,end)
(,(car spec) ,start))
(while (< ,(car spec) ,temp)
,@body
(setq ,(car spec) (1+ ,(car spec))))
,@(cdr (cdr spec))))))
(defmacro declare (&rest _specs)
"Do not evaluate any arguments, and return nil.
If a `declare' form appears as the first form in the body of a
`defun' or `defmacro' form, SPECS specifies various additional
information about the function or macro; these go into effect
during the evaluation of the `defun' or `defmacro' form.
The possible values of SPECS are specified by
`defun-declarations-alist' and `macro-declarations-alist'.
For more information, see info node `(elisp)Declare Form'."
;; FIXME: edebug spec should pay attention to defun-declarations-alist.
nil)
(defmacro ignore-errors (&rest body)
"Execute BODY; if an error occurs, return nil.
Otherwise, return result of last form in BODY.
See also `with-demoted-errors' that does something similar
without silencing all errors."
(declare (debug t) (indent 0))
`(condition-case nil (progn ,@body) (error nil)))
\f
;;;; Basic Lisp functions.
(defun ignore (&rest _ignore)
"Do nothing and return nil.
This function accepts any number of arguments, but ignores them."
(interactive)
nil)
;; Signal a compile-error if the first arg is missing.
(defun error (&rest args)
"Signal an error, making error message by passing all args to `format'.
In Emacs, the convention is that error messages start with a capital
letter but *do not* end with a period. Please follow this convention
for the sake of consistency."
(declare (advertised-calling-convention (string &rest args) "23.1"))
(signal 'error (list (apply 'format args))))
(defun user-error (format &rest args)
"Signal a pilot error, making error message by passing all args to `format'.
In Emacs, the convention is that error messages start with a capital
letter but *do not* end with a period. Please follow this convention
for the sake of consistency.
This is just like `error' except that `user-error's are expected to be the
result of an incorrect manipulation on the part of the user, rather than the
result of an actual problem."
(signal 'user-error (list (apply #'format format args))))
(defun define-error (name message &optional parent)
"Define NAME as a new error signal.
MESSAGE is a string that will be output to the echo area if such an error
is signaled without being caught by a `condition-case'.
PARENT is either a signal or a list of signals from which it inherits.
Defaults to `error'."
(unless parent (setq parent 'error))
(let ((conditions
(if (consp parent)
(apply #'append
(mapcar (lambda (parent)
(cons parent
(or (get parent 'error-conditions)
(error "Unknown signal `%s'" parent))))
parent))
(cons parent (get parent 'error-conditions)))))
(put name 'error-conditions
(delete-dups (copy-sequence (cons name conditions))))
(when message (put name 'error-message message))))
;; We put this here instead of in frame.el so that it's defined even on
;; systems where frame.el isn't loaded.
(defun frame-configuration-p (object)
"Return non-nil if OBJECT seems to be a frame configuration.
Any list whose car is `frame-configuration' is assumed to be a frame
configuration."
(and (consp object)
(eq (car object) 'frame-configuration)))
\f
;;;; List functions.
;; Note: `internal--compiler-macro-cXXr' was copied from
;; `cl--compiler-macro-cXXr' in cl-macs.el. If you amend either one,
;; you may want to amend the other, too.
(defun internal--compiler-macro-cXXr (form x)
(let* ((head (car form))
(n (symbol-name (car form)))
(i (- (length n) 2)))
(if (not (string-match "c[ad]+r\\'" n))
(if (and (fboundp head) (symbolp (symbol-function head)))
(internal--compiler-macro-cXXr (cons (symbol-function head) (cdr form))
x)
(error "Compiler macro for cXXr applied to non-cXXr form"))
(while (> i (match-beginning 0))
(setq x (list (if (eq (aref n i) ?a) 'car 'cdr) x))
(setq i (1- i)))
x)))
(defun caar (x)
"Return the car of the car of X."
(declare (compiler-macro internal--compiler-macro-cXXr))
(car (car x)))
(defun cadr (x)
"Return the car of the cdr of X."
(declare (compiler-macro internal--compiler-macro-cXXr))
(car (cdr x)))
(defun cdar (x)
"Return the cdr of the car of X."
(declare (compiler-macro internal--compiler-macro-cXXr))
(cdr (car x)))
(defun cddr (x)
"Return the cdr of the cdr of X."
(declare (compiler-macro internal--compiler-macro-cXXr))
(cdr (cdr x)))
(defun last (list &optional n)
"Return the last link of LIST. Its car is the last element.
If LIST is nil, return nil.
If N is non-nil, return the Nth-to-last link of LIST.
If N is bigger than the length of LIST, return LIST."
(if n
(and (>= n 0)
(let ((m (safe-length list)))
(if (< n m) (nthcdr (- m n) list) list)))
(and list
(nthcdr (1- (safe-length list)) list))))
(defun butlast (list &optional n)
"Return a copy of LIST with the last N elements removed.
If N is omitted or nil, the last element is removed from the
copy."
(if (and n (<= n 0)) list
(nbutlast (copy-sequence list) n)))
(defun nbutlast (list &optional n)
"Modifies LIST to remove the last N elements.
If N is omitted or nil, remove the last element."
(let ((m (length list)))
(or n (setq n 1))
(and (< n m)
(progn
(if (> n 0) (setcdr (nthcdr (- (1- m) n) list) nil))
list))))
(defun zerop (number)
"Return t if NUMBER is zero."
;; Used to be in C, but it's pointless since (= 0 n) is faster anyway because
;; = has a byte-code.
(declare (compiler-macro (lambda (_) `(= 0 ,number))))
(= 0 number))
(defun delete-dups (list)
"Destructively remove `equal' duplicates from LIST.
Store the result in LIST and return it. LIST must be a proper list.
Of several `equal' occurrences of an element in LIST, the first
one is kept."
(let ((tail list))
(while tail
(setcdr tail (delete (car tail) (cdr tail)))
(setq tail (cdr tail))))
list)
;; See http://lists.gnu.org/archive/html/emacs-devel/2013-05/msg00204.html
(defun delete-consecutive-dups (list &optional circular)
"Destructively remove `equal' consecutive duplicates from LIST.
First and last elements are considered consecutive if CIRCULAR is
non-nil."
(let ((tail list) last)
(while (consp tail)
(if (equal (car tail) (cadr tail))
(setcdr tail (cddr tail))
(setq last (car tail)
tail (cdr tail))))
(if (and circular
(cdr list)
(equal last (car list)))
(nbutlast list)
list)))
(defun number-sequence (from &optional to inc)
"Return a sequence of numbers from FROM to TO (both inclusive) as a list.
INC is the increment used between numbers in the sequence and defaults to 1.
So, the Nth element of the list is (+ FROM (* N INC)) where N counts from
zero. TO is only included if there is an N for which TO = FROM + N * INC.
If TO is nil or numerically equal to FROM, return (FROM).
If INC is positive and TO is less than FROM, or INC is negative
and TO is larger than FROM, return nil.
If INC is zero and TO is neither nil nor numerically equal to
FROM, signal an error.
This function is primarily designed for integer arguments.
Nevertheless, FROM, TO and INC can be integer or float. However,
floating point arithmetic is inexact. For instance, depending on
the machine, it may quite well happen that
\(number-sequence 0.4 0.6 0.2) returns the one element list (0.4),
whereas (number-sequence 0.4 0.8 0.2) returns a list with three
elements. Thus, if some of the arguments are floats and one wants
to make sure that TO is included, one may have to explicitly write
TO as (+ FROM (* N INC)) or use a variable whose value was
computed with this exact expression. Alternatively, you can,
of course, also replace TO with a slightly larger value
\(or a slightly more negative value if INC is negative)."
(if (or (not to) (= from to))
(list from)
(or inc (setq inc 1))
(when (zerop inc) (error "The increment can not be zero"))
(let (seq (n 0) (next from))
(if (> inc 0)
(while (<= next to)
(setq seq (cons next seq)
n (1+ n)
next (+ from (* n inc))))
(while (>= next to)
(setq seq (cons next seq)
n (1+ n)
next (+ from (* n inc)))))
(nreverse seq))))
(defun copy-tree (tree &optional vecp)
"Make a copy of TREE.
If TREE is a cons cell, this recursively copies both its car and its cdr.
Contrast to `copy-sequence', which copies only along the cdrs. With second
argument VECP, this copies vectors as well as conses."
(if (consp tree)
(let (result)
(while (consp tree)
(let ((newcar (car tree)))
(if (or (consp (car tree)) (and vecp (vectorp (car tree))))
(setq newcar (copy-tree (car tree) vecp)))
(push newcar result))
(setq tree (cdr tree)))
(nconc (nreverse result) tree))
(if (and vecp (vectorp tree))
(let ((i (length (setq tree (copy-sequence tree)))))
(while (>= (setq i (1- i)) 0)
(aset tree i (copy-tree (aref tree i) vecp)))
tree)
tree)))
\f
;;;; Various list-search functions.
(defun assoc-default (key alist &optional test default)
"Find object KEY in a pseudo-alist ALIST.
ALIST is a list of conses or objects. Each element
(or the element's car, if it is a cons) is compared with KEY by
calling TEST, with two arguments: (i) the element or its car,
and (ii) KEY.
If that is non-nil, the element matches; then `assoc-default'
returns the element's cdr, if it is a cons, or DEFAULT if the
element is not a cons.
If no element matches, the value is nil.
If TEST is omitted or nil, `equal' is used."
(let (found (tail alist) value)
(while (and tail (not found))
(let ((elt (car tail)))
(when (funcall (or test 'equal) (if (consp elt) (car elt) elt) key)
(setq found t value (if (consp elt) (cdr elt) default))))
(setq tail (cdr tail)))
value))
(defun assoc-ignore-case (key alist)
"Like `assoc', but ignores differences in case and text representation.
KEY must be a string. Upper-case and lower-case letters are treated as equal.
Unibyte strings are converted to multibyte for comparison."
(declare (obsolete assoc-string "22.1"))
(assoc-string key alist t))
(defun assoc-ignore-representation (key alist)
"Like `assoc', but ignores differences in text representation.
KEY must be a string.
Unibyte strings are converted to multibyte for comparison."
(declare (obsolete assoc-string "22.1"))
(assoc-string key alist nil))
(defun member-ignore-case (elt list)
"Like `member', but ignore differences in case and text representation.
ELT must be a string. Upper-case and lower-case letters are treated as equal.
Unibyte strings are converted to multibyte for comparison.
Non-strings in LIST are ignored."
(while (and list
(not (and (stringp (car list))
(eq t (compare-strings elt 0 nil (car list) 0 nil t)))))
(setq list (cdr list)))
list)
(defun assq-delete-all (key alist)
"Delete from ALIST all elements whose car is `eq' to KEY.
Return the modified alist.
Elements of ALIST that are not conses are ignored."
(while (and (consp (car alist))
(eq (car (car alist)) key))
(setq alist (cdr alist)))
(let ((tail alist) tail-cdr)
(while (setq tail-cdr (cdr tail))
(if (and (consp (car tail-cdr))
(eq (car (car tail-cdr)) key))
(setcdr tail (cdr tail-cdr))
(setq tail tail-cdr))))
alist)
(defun rassq-delete-all (value alist)
"Delete from ALIST all elements whose cdr is `eq' to VALUE.
Return the modified alist.
Elements of ALIST that are not conses are ignored."
(while (and (consp (car alist))
(eq (cdr (car alist)) value))
(setq alist (cdr alist)))
(let ((tail alist) tail-cdr)
(while (setq tail-cdr (cdr tail))
(if (and (consp (car tail-cdr))
(eq (cdr (car tail-cdr)) value))
(setcdr tail (cdr tail-cdr))
(setq tail tail-cdr))))
alist)
(defun alist-get (key alist &optional default remove)
"Get the value associated to KEY in ALIST.
DEFAULT is the value to return if KEY is not found in ALIST.
REMOVE, if non-nil, means that when setting this element, we should
remove the entry if the new value is `eql' to DEFAULT."
(ignore remove) ;;Silence byte-compiler.
(let ((x (assq key alist)))
(if x (cdr x) default)))
(defun remove (elt seq)
"Return a copy of SEQ with all occurrences of ELT removed.
SEQ must be a list, vector, or string. The comparison is done with `equal'."
(if (nlistp seq)
;; If SEQ isn't a list, there's no need to copy SEQ because
;; `delete' will return a new object.
(delete elt seq)
(delete elt (copy-sequence seq))))
(defun remq (elt list)
"Return LIST with all occurrences of ELT removed.
The comparison is done with `eq'. Contrary to `delq', this does not use
side-effects, and the argument LIST is not modified."
(while (and (eq elt (car list)) (setq list (cdr list))))
(if (memq elt list)
(delq elt (copy-sequence list))
list))
\f
;;;; Keymap support.
(defun kbd (keys)
"Convert KEYS to the internal Emacs key representation.
KEYS should be a string constant in the format used for
saving keyboard macros (see `edmacro-mode')."
;; Don't use a defalias, since the `pure' property is only true for
;; the calling convention of `kbd'.
(read-kbd-macro keys))
(put 'kbd 'pure t)
(defun undefined ()
"Beep to tell the user this binding is undefined."
(interactive)
(ding)
(message "%s is undefined" (key-description (this-single-command-keys)))
(setq defining-kbd-macro nil)
(force-mode-line-update)
;; If this is a down-mouse event, don't reset prefix-arg;
;; pass it to the command run by the up event.
(setq prefix-arg
(when (memq 'down (event-modifiers last-command-event))
current-prefix-arg)))
;; Prevent the \{...} documentation construct
;; from mentioning keys that run this command.
(put 'undefined 'suppress-keymap t)
(defun suppress-keymap (map &optional nodigits)
"Make MAP override all normally self-inserting keys to be undefined.
Normally, as an exception, digits and minus-sign are set to make prefix args,
but optional second arg NODIGITS non-nil treats them like other chars."
(define-key map [remap self-insert-command] 'undefined)
(or nodigits
(let (loop)
(define-key map "-" 'negative-argument)
;; Make plain numbers do numeric args.
(setq loop ?0)
(while (<= loop ?9)
(define-key map (char-to-string loop) 'digit-argument)
(setq loop (1+ loop))))))
(defun make-composed-keymap (maps &optional parent)
"Construct a new keymap composed of MAPS and inheriting from PARENT.
When looking up a key in the returned map, the key is looked in each
keymap of MAPS in turn until a binding is found.
If no binding is found in MAPS, the lookup continues in PARENT, if non-nil.
As always with keymap inheritance, a nil binding in MAPS overrides
any corresponding binding in PARENT, but it does not override corresponding
bindings in other keymaps of MAPS.
MAPS can be a list of keymaps or a single keymap.
PARENT if non-nil should be a keymap."
`(keymap
,@(if (keymapp maps) (list maps) maps)
,@parent))
(defun define-key-after (keymap key definition &optional after)
"Add binding in KEYMAP for KEY => DEFINITION, right after AFTER's binding.
This is like `define-key' except that the binding for KEY is placed
just after the binding for the event AFTER, instead of at the beginning
of the map. Note that AFTER must be an event type (like KEY), NOT a command
\(like DEFINITION).
If AFTER is t or omitted, the new binding goes at the end of the keymap.
AFTER should be a single event type--a symbol or a character, not a sequence.
Bindings are always added before any inherited map.
The order of bindings in a keymap only matters when it is used as
a menu, so this function is not useful for non-menu keymaps."
(unless after (setq after t))
(or (keymapp keymap)
(signal 'wrong-type-argument (list 'keymapp keymap)))
(setq key
(if (<= (length key) 1) (aref key 0)
(setq keymap (lookup-key keymap
(apply 'vector
(butlast (mapcar 'identity key)))))
(aref key (1- (length key)))))
(let ((tail keymap) done inserted)
(while (and (not done) tail)
;; Delete any earlier bindings for the same key.
(if (eq (car-safe (car (cdr tail))) key)
(setcdr tail (cdr (cdr tail))))
;; If we hit an included map, go down that one.
(if (keymapp (car tail)) (setq tail (car tail)))
;; When we reach AFTER's binding, insert the new binding after.
;; If we reach an inherited keymap, insert just before that.
;; If we reach the end of this keymap, insert at the end.
(if (or (and (eq (car-safe (car tail)) after)
(not (eq after t)))
(eq (car (cdr tail)) 'keymap)
(null (cdr tail)))
(progn
;; Stop the scan only if we find a parent keymap.
;; Keep going past the inserted element
;; so we can delete any duplications that come later.
(if (eq (car (cdr tail)) 'keymap)
(setq done t))
;; Don't insert more than once.
(or inserted
(setcdr tail (cons (cons key definition) (cdr tail))))
(setq inserted t)))
(setq tail (cdr tail)))))
(defun map-keymap-sorted (function keymap)
"Implement `map-keymap' with sorting.
Don't call this function; it is for internal use only."
(let (list)
(map-keymap (lambda (a b) (push (cons a b) list))
keymap)
(setq list (sort list
(lambda (a b)
(setq a (car a) b (car b))
(if (integerp a)
(if (integerp b) (< a b)
t)
(if (integerp b) t
;; string< also accepts symbols.
(string< a b))))))
(dolist (p list)
(funcall function (car p) (cdr p)))))
(defun keymap--menu-item-binding (val)
"Return the binding part of a menu-item."
(cond
((not (consp val)) val) ;Not a menu-item.
((eq 'menu-item (car val))
(let* ((binding (nth 2 val))
(plist (nthcdr 3 val))
(filter (plist-get plist :filter)))
(if filter (funcall filter binding)
binding)))
((and (consp (cdr val)) (stringp (cadr val)))
(cddr val))
((stringp (car val))
(cdr val))
(t val))) ;Not a menu-item either.
(defun keymap--menu-item-with-binding (item binding)
"Build a menu-item like ITEM but with its binding changed to BINDING."
(cond
((not (consp item)) binding) ;Not a menu-item.
((eq 'menu-item (car item))
(setq item (copy-sequence item))
(let ((tail (nthcdr 2 item)))
(setcar tail binding)
;; Remove any potential filter.
(if (plist-get (cdr tail) :filter)
(setcdr tail (plist-put (cdr tail) :filter nil))))
item)
((and (consp (cdr item)) (stringp (cadr item)))
(cons (car item) (cons (cadr item) binding)))
(t (cons (car item) binding))))
(defun keymap--merge-bindings (val1 val2)
"Merge bindings VAL1 and VAL2."
(let ((map1 (keymap--menu-item-binding val1))
(map2 (keymap--menu-item-binding val2)))
(if (not (and (keymapp map1) (keymapp map2)))
;; There's nothing to merge: val1 takes precedence.
val1
(let ((map (list 'keymap map1 map2))
(item (if (keymapp val1) (if (keymapp val2) nil val2) val1)))
(keymap--menu-item-with-binding item map)))))
(defun keymap-canonicalize (map)
"Return a simpler equivalent keymap.
This resolves inheritance and redefinitions. The returned keymap
should behave identically to a copy of KEYMAP w.r.t `lookup-key'
and use in active keymaps and menus.
Subkeymaps may be modified but are not canonicalized."
;; FIXME: Problem with the difference between a nil binding
;; that hides a binding in an inherited map and a nil binding that's ignored
;; to let some further binding visible. Currently a nil binding hides all.
;; FIXME: we may want to carefully (re)order elements in case they're
;; menu-entries.
(let ((bindings ())
(ranges ())
(prompt (keymap-prompt map)))
(while (keymapp map)
(setq map (map-keymap ;; -internal
(lambda (key item)
(if (consp key)
;; Treat char-ranges specially.
(push (cons key item) ranges)
(push (cons key item) bindings)))
map)))
;; Create the new map.
(setq map (funcall (if ranges 'make-keymap 'make-sparse-keymap) prompt))
(dolist (binding ranges)
;; Treat char-ranges specially. FIXME: need to merge as well.
(define-key map (vector (car binding)) (cdr binding)))
;; Process the bindings starting from the end.
(dolist (binding (prog1 bindings (setq bindings ())))
(let* ((key (car binding))
(oldbind (assq key bindings)))
(push (if (not oldbind)
;; The normal case: no duplicate bindings.
binding
;; This is the second binding for this key.
(setq bindings (delq oldbind bindings))
(cons key (keymap--merge-bindings (cdr binding)
(cdr oldbind))))
bindings)))
(nconc map bindings)))
(put 'keyboard-translate-table 'char-table-extra-slots 0)
(defun keyboard-translate (from to)
"Translate character FROM to TO on the current terminal.
This function creates a `keyboard-translate-table' if necessary
and then modifies one entry in it."
(or (char-table-p keyboard-translate-table)
(setq keyboard-translate-table
(make-char-table 'keyboard-translate-table nil)))
(aset keyboard-translate-table from to))
\f
;;;; Key binding commands.
(defun global-set-key (key command)
"Give KEY a global binding as COMMAND.
COMMAND is the command definition to use; usually it is
a symbol naming an interactively-callable function.
KEY is a key sequence; noninteractively, it is a string or vector
of characters or event types, and non-ASCII characters with codes
above 127 (such as ISO Latin-1) can be included if you use a vector.
Note that if KEY has a local binding in the current buffer,
that local binding will continue to shadow any global binding
that you make with this function."
(interactive "KSet key globally: \nCSet key %s to command: ")
(or (vectorp key) (stringp key)
(signal 'wrong-type-argument (list 'arrayp key)))
(define-key (current-global-map) key command))
(defun local-set-key (key command)
"Give KEY a local binding as COMMAND.
COMMAND is the command definition to use; usually it is
a symbol naming an interactively-callable function.
KEY is a key sequence; noninteractively, it is a string or vector
of characters or event types, and non-ASCII characters with codes
above 127 (such as ISO Latin-1) can be included if you use a vector.
The binding goes in the current buffer's local map, which in most
cases is shared with all other buffers in the same major mode."
(interactive "KSet key locally: \nCSet key %s locally to command: ")
(let ((map (current-local-map)))
(or map
(use-local-map (setq map (make-sparse-keymap))))
(or (vectorp key) (stringp key)
(signal 'wrong-type-argument (list 'arrayp key)))
(define-key map key command)))
(defun global-unset-key (key)
"Remove global binding of KEY.
KEY is a string or vector representing a sequence of keystrokes."
(interactive "kUnset key globally: ")
(global-set-key key nil))
(defun local-unset-key (key)
"Remove local binding of KEY.
KEY is a string or vector representing a sequence of keystrokes."
(interactive "kUnset key locally: ")
(if (current-local-map)
(local-set-key key nil))
nil)
\f
;;;; substitute-key-definition and its subroutines.
(defvar key-substitution-in-progress nil
"Used internally by `substitute-key-definition'.")
(defun substitute-key-definition (olddef newdef keymap &optional oldmap prefix)
"Replace OLDDEF with NEWDEF for any keys in KEYMAP now defined as OLDDEF.
In other words, OLDDEF is replaced with NEWDEF where ever it appears.
Alternatively, if optional fourth argument OLDMAP is specified, we redefine
in KEYMAP as NEWDEF those keys which are defined as OLDDEF in OLDMAP.
If you don't specify OLDMAP, you can usually get the same results
in a cleaner way with command remapping, like this:
(define-key KEYMAP [remap OLDDEF] NEWDEF)
\n(fn OLDDEF NEWDEF KEYMAP &optional OLDMAP)"
;; Don't document PREFIX in the doc string because we don't want to
;; advertise it. It's meant for recursive calls only. Here's its
;; meaning
;; If optional argument PREFIX is specified, it should be a key
;; prefix, a string. Redefined bindings will then be bound to the
;; original key, with PREFIX added at the front.
(or prefix (setq prefix ""))
(let* ((scan (or oldmap keymap))
(prefix1 (vconcat prefix [nil]))
(key-substitution-in-progress
(cons scan key-substitution-in-progress)))
;; Scan OLDMAP, finding each char or event-symbol that
;; has any definition, and act on it with hack-key.
(map-keymap
(lambda (char defn)
(aset prefix1 (length prefix) char)
(substitute-key-definition-key defn olddef newdef prefix1 keymap))
scan)))
(defun substitute-key-definition-key (defn olddef newdef prefix keymap)
(let (inner-def skipped menu-item)
;; Find the actual command name within the binding.
(if (eq (car-safe defn) 'menu-item)
(setq menu-item defn defn (nth 2 defn))
;; Skip past menu-prompt.
(while (stringp (car-safe defn))
(push (pop defn) skipped))
;; Skip past cached key-equivalence data for menu items.
(if (consp (car-safe defn))
(setq defn (cdr defn))))
(if (or (eq defn olddef)
;; Compare with equal if definition is a key sequence.
;; That is useful for operating on function-key-map.
(and (or (stringp defn) (vectorp defn))
(equal defn olddef)))
(define-key keymap prefix
(if menu-item
(let ((copy (copy-sequence menu-item)))
(setcar (nthcdr 2 copy) newdef)
copy)
(nconc (nreverse skipped) newdef)))
;; Look past a symbol that names a keymap.
(setq inner-def
(or (indirect-function defn) defn))
;; For nested keymaps, we use `inner-def' rather than `defn' so as to
;; avoid autoloading a keymap. This is mostly done to preserve the
;; original non-autoloading behavior of pre-map-keymap times.
(if (and (keymapp inner-def)
;; Avoid recursively scanning
;; where KEYMAP does not have a submap.
(let ((elt (lookup-key keymap prefix)))
(or (null elt) (natnump elt) (keymapp elt)))
;; Avoid recursively rescanning keymap being scanned.
(not (memq inner-def key-substitution-in-progress)))
;; If this one isn't being scanned already, scan it now.
(substitute-key-definition olddef newdef keymap inner-def prefix)))))
\f
;;;; The global keymap tree.
;; global-map, esc-map, and ctl-x-map have their values set up in
;; keymap.c; we just give them docstrings here.
(defvar global-map nil
"Default global keymap mapping Emacs keyboard input into commands.
The value is a keymap which is usually (but not necessarily) Emacs's
global map.")
(defvar esc-map nil
"Default keymap for ESC (meta) commands.
The normal global definition of the character ESC indirects to this keymap.")
(defvar ctl-x-map nil
"Default keymap for C-x commands.
The normal global definition of the character C-x indirects to this keymap.")
(defvar ctl-x-4-map (make-sparse-keymap)
"Keymap for subcommands of C-x 4.")
(defalias 'ctl-x-4-prefix ctl-x-4-map)
(define-key ctl-x-map "4" 'ctl-x-4-prefix)
(defvar ctl-x-5-map (make-sparse-keymap)
"Keymap for frame commands.")
(defalias 'ctl-x-5-prefix ctl-x-5-map)
(define-key ctl-x-map "5" 'ctl-x-5-prefix)
\f
;;;; Event manipulation functions.
(defconst listify-key-sequence-1 (logior 128 ?\M-\C-@))
(defun listify-key-sequence (key)
"Convert a key sequence to a list of events."
(if (vectorp key)
(append key nil)
(mapcar (function (lambda (c)
(if (> c 127)
(logxor c listify-key-sequence-1)
c)))
key)))
(defun eventp (obj)
"True if the argument is an event object."
(when obj
(or (integerp obj)
(and (symbolp obj) obj (not (keywordp obj)))
(and (consp obj) (symbolp (car obj))))))
(defun event-modifiers (event)
"Return a list of symbols representing the modifier keys in event EVENT.
The elements of the list may include `meta', `control',
`shift', `hyper', `super', `alt', `click', `double', `triple', `drag',
and `down'.
EVENT may be an event or an event type. If EVENT is a symbol
that has never been used in an event that has been read as input
in the current Emacs session, then this function may fail to include
the `click' modifier."
(let ((type event))
(if (listp type)
(setq type (car type)))
(if (symbolp type)
;; Don't read event-symbol-elements directly since we're not
;; sure the symbol has already been parsed.
(cdr (internal-event-symbol-parse-modifiers type))
(let ((list nil)
(char (logand type (lognot (logior ?\M-\^@ ?\C-\^@ ?\S-\^@
?\H-\^@ ?\s-\^@ ?\A-\^@)))))
(if (not (zerop (logand type ?\M-\^@)))
(push 'meta list))
(if (or (not (zerop (logand type ?\C-\^@)))
(< char 32))
(push 'control list))
(if (or (not (zerop (logand type ?\S-\^@)))
(/= char (downcase char)))
(push 'shift list))
(or (zerop (logand type ?\H-\^@))
(push 'hyper list))
(or (zerop (logand type ?\s-\^@))
(push 'super list))
(or (zerop (logand type ?\A-\^@))
(push 'alt list))
list))))
(defun event-basic-type (event)
"Return the basic type of the given event (all modifiers removed).
The value is a printing character (not upper case) or a symbol.
EVENT may be an event or an event type. If EVENT is a symbol
that has never been used in an event that has been read as input
in the current Emacs session, then this function may return nil."
(if (consp event)
(setq event (car event)))
(if (symbolp event)
(car (get event 'event-symbol-elements))
(let* ((base (logand event (1- ?\A-\^@)))
(uncontrolled (if (< base 32) (logior base 64) base)))
;; There are some numbers that are invalid characters and
;; cause `downcase' to get an error.
(condition-case ()
(downcase uncontrolled)
(error uncontrolled)))))
(defsubst mouse-movement-p (object)
"Return non-nil if OBJECT is a mouse movement event."
(eq (car-safe object) 'mouse-movement))
(defun mouse-event-p (object)
"Return non-nil if OBJECT is a mouse click event."
;; is this really correct? maybe remove mouse-movement?
(memq (event-basic-type object) '(mouse-1 mouse-2 mouse-3 mouse-movement)))
(defun event-start (event)
"Return the starting position of EVENT.
EVENT should be a mouse click, drag, or key press event. If
EVENT is nil, the value of `posn-at-point' is used instead.
The following accessor functions are used to access the elements
of the position:
`posn-window': The window the event is in.
`posn-area': A symbol identifying the area the event occurred in,
or nil if the event occurred in the text area.
`posn-point': The buffer position of the event.
`posn-x-y': The pixel-based coordinates of the event.
`posn-col-row': The estimated column and row corresponding to the
position of the event.
`posn-actual-col-row': The actual column and row corresponding to the
position of the event.
`posn-string': The string object of the event, which is either
nil or (STRING . POSITION)'.
`posn-image': The image object of the event, if any.
`posn-object': The image or string object of the event, if any.
`posn-timestamp': The time the event occurred, in milliseconds.
For more information, see Info node `(elisp)Click Events'."
(if (consp event) (nth 1 event)
(or (posn-at-point)
(list (selected-window) (point) '(0 . 0) 0))))
(defun event-end (event)
"Return the ending position of EVENT.
EVENT should be a click, drag, or key press event.
See `event-start' for a description of the value returned."
(if (consp event) (nth (if (consp (nth 2 event)) 2 1) event)
(or (posn-at-point)
(list (selected-window) (point) '(0 . 0) 0))))
(defsubst event-click-count (event)
"Return the multi-click count of EVENT, a click or drag event.
The return value is a positive integer."
(if (and (consp event) (integerp (nth 2 event))) (nth 2 event) 1))
\f
;;;; Extracting fields of the positions in an event.
(defun posnp (obj)
"Return non-nil if OBJ appears to be a valid `posn' object specifying a window.
If OBJ is a valid `posn' object, but specifies a frame rather
than a window, return nil."
;; FIXME: Correct the behavior of this function so that all valid
;; `posn' objects are recognized, after updating other code that
;; depends on its present behavior.
(and (windowp (car-safe obj))
(atom (car-safe (setq obj (cdr obj)))) ;AREA-OR-POS.
(integerp (car-safe (car-safe (setq obj (cdr obj))))) ;XOFFSET.
(integerp (car-safe (cdr obj))))) ;TIMESTAMP.
(defsubst posn-window (position)
"Return the window in POSITION.
POSITION should be a list of the form returned by the `event-start'
and `event-end' functions."
(nth 0 position))
(defsubst posn-area (position)
"Return the window area recorded in POSITION, or nil for the text area.
POSITION should be a list of the form returned by the `event-start'
and `event-end' functions."
(let ((area (if (consp (nth 1 position))
(car (nth 1 position))
(nth 1 position))))
(and (symbolp area) area)))
(defun posn-point (position)
"Return the buffer location in POSITION.
POSITION should be a list of the form returned by the `event-start'
and `event-end' functions.
Returns nil if POSITION does not correspond to any buffer location (e.g.
a click on a scroll bar)."
(or (nth 5 position)
(let ((pt (nth 1 position)))
(or (car-safe pt)
;; Apparently this can also be `vertical-scroll-bar' (bug#13979).
(if (integerp pt) pt)))))
(defun posn-set-point (position)
"Move point to POSITION.
Select the corresponding window as well."
(if (not (windowp (posn-window position)))
(error "Position not in text area of window"))
(select-window (posn-window position))
(if (numberp (posn-point position))
(goto-char (posn-point position))))
(defsubst posn-x-y (position)
"Return the x and y coordinates in POSITION.
The return value has the form (X . Y), where X and Y are given in
pixels. POSITION should be a list of the form returned by
`event-start' and `event-end'."
(nth 2 position))
(declare-function scroll-bar-scale "scroll-bar" (num-denom whole))
(defun posn-col-row (position)
"Return the nominal column and row in POSITION, measured in characters.
The column and row values are approximations calculated from the x
and y coordinates in POSITION and the frame's default character width
and default line height, including spacing.
For a scroll-bar event, the result column is 0, and the row
corresponds to the vertical position of the click in the scroll bar.
POSITION should be a list of the form returned by the `event-start'
and `event-end' functions."
(let* ((pair (posn-x-y position))
(frame-or-window (posn-window position))
(frame (if (framep frame-or-window)
frame-or-window
(window-frame frame-or-window)))
(window (when (windowp frame-or-window) frame-or-window))
(area (posn-area position)))
(cond
((null frame-or-window)
'(0 . 0))
((eq area 'vertical-scroll-bar)
(cons 0 (scroll-bar-scale pair (1- (window-height window)))))
((eq area 'horizontal-scroll-bar)
(cons (scroll-bar-scale pair (window-width window)) 0))
(t
;; FIXME: This should take line-spacing properties on
;; newlines into account.
(let* ((spacing (when (display-graphic-p frame)
(or (with-current-buffer
(window-buffer (frame-selected-window frame))
line-spacing)
(frame-parameter frame 'line-spacing)))))
(cond ((floatp spacing)
(setq spacing (truncate (* spacing
(frame-char-height frame)))))
((null spacing)
(setq spacing 0)))
(cons (/ (car pair) (frame-char-width frame))
(/ (cdr pair) (+ (frame-char-height frame) spacing))))))))
(defun posn-actual-col-row (position)
"Return the window row number in POSITION and character number in that row.
Return nil if POSITION does not contain the actual position; in that case
\`posn-col-row' can be used to get approximate values.
POSITION should be a list of the form returned by the `event-start'
and `event-end' functions.
This function does not account for the width on display, like the
number of visual columns taken by a TAB or image. If you need
the coordinates of POSITION in character units, you should use
\`posn-col-row', not this function."
(nth 6 position))
(defsubst posn-timestamp (position)
"Return the timestamp of POSITION.
POSITION should be a list of the form returned by the `event-start'
and `event-end' functions."
(nth 3 position))
(defun posn-string (position)
"Return the string object of POSITION.
Value is a cons (STRING . STRING-POS), or nil if not a string.
POSITION should be a list of the form returned by the `event-start'
and `event-end' functions."
(let ((x (nth 4 position)))
;; Apparently this can also be `handle' or `below-handle' (bug#13979).
(when (consp x) x)))
(defsubst posn-image (position)
"Return the image object of POSITION.
Value is a list (image ...), or nil if not an image.
POSITION should be a list of the form returned by the `event-start'
and `event-end' functions."
(nth 7 position))
(defsubst posn-object (position)
"Return the object (image or string) of POSITION.
Value is a list (image ...) for an image object, a cons cell
\(STRING . STRING-POS) for a string object, and nil for a buffer position.
POSITION should be a list of the form returned by the `event-start'
and `event-end' functions."
(or (posn-image position) (posn-string position)))
(defsubst posn-object-x-y (position)
"Return the x and y coordinates relative to the object of POSITION.
The return value has the form (DX . DY), where DX and DY are
given in pixels. POSITION should be a list of the form returned
by `event-start' and `event-end'."
(nth 8 position))
(defsubst posn-object-width-height (position)
"Return the pixel width and height of the object of POSITION.
The return value has the form (WIDTH . HEIGHT). POSITION should
be a list of the form returned by `event-start' and `event-end'."
(nth 9 position))
\f
;;;; Obsolescent names for functions.
(define-obsolete-function-alias 'window-dot 'window-point "22.1")
(define-obsolete-function-alias 'set-window-dot 'set-window-point "22.1")
(define-obsolete-function-alias 'read-input 'read-string "22.1")
(define-obsolete-function-alias 'show-buffer 'set-window-buffer "22.1")
(define-obsolete-function-alias 'eval-current-buffer 'eval-buffer "22.1")
(define-obsolete-function-alias 'string-to-int 'string-to-number "22.1")
(make-obsolete 'forward-point "use (+ (point) N) instead." "23.1")
(make-obsolete 'buffer-has-markers-at nil "24.3")
(defun insert-string (&rest args)
"Mocklisp-compatibility insert function.
Like the function `insert' except that any argument that is a number
is converted into a string by expressing it in decimal."
(declare (obsolete insert "22.1"))
(dolist (el args)
(insert (if (integerp el) (number-to-string el) el))))
(defun makehash (&optional test)
(declare (obsolete make-hash-table "22.1"))
(make-hash-table :test (or test 'eql)))
(defun log10 (x)
"Return (log X 10), the log base 10 of X."
(declare (obsolete log "24.4"))
(log x 10))
;; These are used by VM and some old programs
(defalias 'focus-frame 'ignore "")
(make-obsolete 'focus-frame "it does nothing." "22.1")
(defalias 'unfocus-frame 'ignore "")
(make-obsolete 'unfocus-frame "it does nothing." "22.1")
(make-obsolete 'make-variable-frame-local
"explicitly check for a frame-parameter instead." "22.2")
(set-advertised-calling-convention
'all-completions '(string collection &optional predicate) "23.1")
(set-advertised-calling-convention 'unintern '(name obarray) "23.3")
(set-advertised-calling-convention 'indirect-function '(object) "25.1")
(set-advertised-calling-convention 'redirect-frame-focus '(frame focus-frame) "24.3")
(set-advertised-calling-convention 'decode-char '(ch charset) "21.4")
(set-advertised-calling-convention 'encode-char '(ch charset) "21.4")
\f
;;;; Obsolescence declarations for variables, and aliases.
;; Special "default-FOO" variables which contain the default value of
;; the "FOO" variable are nasty. Their implementation is brittle, and
;; slows down several unrelated variable operations; furthermore, they
;; can lead to really odd behavior if you decide to make them
;; buffer-local.
;; Not used at all in Emacs, last time I checked:
(make-obsolete-variable 'default-mode-line-format 'mode-line-format "23.2")
(make-obsolete-variable 'default-header-line-format 'header-line-format "23.2")
(make-obsolete-variable 'default-line-spacing 'line-spacing "23.2")
(make-obsolete-variable 'default-abbrev-mode 'abbrev-mode "23.2")
(make-obsolete-variable 'default-ctl-arrow 'ctl-arrow "23.2")
(make-obsolete-variable 'default-truncate-lines 'truncate-lines "23.2")
(make-obsolete-variable 'default-left-margin 'left-margin "23.2")
(make-obsolete-variable 'default-tab-width 'tab-width "23.2")
(make-obsolete-variable 'default-case-fold-search 'case-fold-search "23.2")
(make-obsolete-variable 'default-left-margin-width 'left-margin-width "23.2")
(make-obsolete-variable 'default-right-margin-width 'right-margin-width "23.2")
(make-obsolete-variable 'default-left-fringe-width 'left-fringe-width "23.2")
(make-obsolete-variable 'default-right-fringe-width 'right-fringe-width "23.2")
(make-obsolete-variable 'default-fringes-outside-margins 'fringes-outside-margins "23.2")
(make-obsolete-variable 'default-scroll-bar-width 'scroll-bar-width "23.2")
(make-obsolete-variable 'default-vertical-scroll-bar 'vertical-scroll-bar "23.2")
(make-obsolete-variable 'default-indicate-empty-lines 'indicate-empty-lines "23.2")
(make-obsolete-variable 'default-indicate-buffer-boundaries 'indicate-buffer-boundaries "23.2")
(make-obsolete-variable 'default-fringe-indicator-alist 'fringe-indicator-alist "23.2")
(make-obsolete-variable 'default-fringe-cursor-alist 'fringe-cursor-alist "23.2")
(make-obsolete-variable 'default-scroll-up-aggressively 'scroll-up-aggressively "23.2")
(make-obsolete-variable 'default-scroll-down-aggressively 'scroll-down-aggressively "23.2")
(make-obsolete-variable 'default-fill-column 'fill-column "23.2")
(make-obsolete-variable 'default-cursor-type 'cursor-type "23.2")
(make-obsolete-variable 'default-cursor-in-non-selected-windows 'cursor-in-non-selected-windows "23.2")
(make-obsolete-variable 'default-buffer-file-coding-system 'buffer-file-coding-system "23.2")
(make-obsolete-variable 'default-major-mode 'major-mode "23.2")
(make-obsolete-variable 'default-enable-multibyte-characters
"use enable-multibyte-characters or set-buffer-multibyte instead" "23.2")
(make-obsolete-variable 'define-key-rebound-commands nil "23.2")
(make-obsolete-variable 'redisplay-end-trigger-functions 'jit-lock-register "23.1")
(make-obsolete-variable 'deferred-action-list 'post-command-hook "24.1")
(make-obsolete-variable 'deferred-action-function 'post-command-hook "24.1")
(make-obsolete-variable 'redisplay-dont-pause nil "24.5")
(make-obsolete 'window-redisplay-end-trigger nil "23.1")
(make-obsolete 'set-window-redisplay-end-trigger nil "23.1")
(make-obsolete 'process-filter-multibyte-p nil "23.1")
(make-obsolete 'set-process-filter-multibyte nil "23.1")
;; Lisp manual only updated in 22.1.
(define-obsolete-variable-alias 'executing-macro 'executing-kbd-macro
"before 19.34")
(define-obsolete-variable-alias 'x-lost-selection-hooks
'x-lost-selection-functions "22.1")
(define-obsolete-variable-alias 'x-sent-selection-hooks
'x-sent-selection-functions "22.1")
;; This was introduced in 21.4 for pre-unicode unification. That
;; usage was rendered obsolete in 23.1 which uses Unicode internally.
;; Other uses are possible, so this variable is not _really_ obsolete,
;; but Stefan insists to mark it so.
(make-obsolete-variable 'translation-table-for-input nil "23.1")
(defvaralias 'messages-buffer-max-lines 'message-log-max)
\f
;;;; Alternate names for functions - these are not being phased out.
(defalias 'send-string 'process-send-string)
(defalias 'send-region 'process-send-region)
(defalias 'string= 'string-equal)
(defalias 'string< 'string-lessp)
(defalias 'move-marker 'set-marker)
(defalias 'rplaca 'setcar)
(defalias 'rplacd 'setcdr)
(defalias 'beep 'ding) ;preserve lingual purity
(defalias 'indent-to-column 'indent-to)
(defalias 'backward-delete-char 'delete-backward-char)
(defalias 'search-forward-regexp (symbol-function 're-search-forward))
(defalias 'search-backward-regexp (symbol-function 're-search-backward))
(defalias 'int-to-string 'number-to-string)
(defalias 'store-match-data 'set-match-data)
(defalias 'chmod 'set-file-modes)
(defalias 'mkdir 'make-directory)
;; These are the XEmacs names:
(defalias 'point-at-eol 'line-end-position)
(defalias 'point-at-bol 'line-beginning-position)
(defalias 'user-original-login-name 'user-login-name)
\f
;;;; Hook manipulation functions.
(defun add-hook (hook function &optional append local)
"Add to the value of HOOK the function FUNCTION.
FUNCTION is not added if already present.
FUNCTION is added (if necessary) at the beginning of the hook list
unless the optional argument APPEND is non-nil, in which case
FUNCTION is added at the end.
The optional fourth argument, LOCAL, if non-nil, says to modify
the hook's buffer-local value rather than its global value.
This makes the hook buffer-local, and it makes t a member of the
buffer-local value. That acts as a flag to run the hook
functions of the global value as well as in the local value.
HOOK should be a symbol, and FUNCTION may be any valid function. If
HOOK is void, it is first set to nil. If HOOK's value is a single
function, it is changed to a list of functions."
(or (boundp hook) (set hook nil))
(or (default-boundp hook) (set-default hook nil))
(if local (unless (local-variable-if-set-p hook)
(set (make-local-variable hook) (list t)))
;; Detect the case where make-local-variable was used on a hook
;; and do what we used to do.
(unless (and (consp (symbol-value hook)) (memq t (symbol-value hook)))
(setq local t)))
(let ((hook-value (if local (symbol-value hook) (default-value hook))))
;; If the hook value is a single function, turn it into a list.
(when (or (not (listp hook-value)) (functionp hook-value))
(setq hook-value (list hook-value)))
;; Do the actual addition if necessary
(unless (member function hook-value)
(when (stringp function)
(setq function (purecopy function)))
(setq hook-value
(if append
(append hook-value (list function))
(cons function hook-value))))
;; Set the actual variable
(if local
(progn
;; If HOOK isn't a permanent local,
;; but FUNCTION wants to survive a change of modes,
;; mark HOOK as partially permanent.
(and (symbolp function)
(get function 'permanent-local-hook)
(not (get hook 'permanent-local))
(put hook 'permanent-local 'permanent-local-hook))
(set hook hook-value))
(set-default hook hook-value))))
(defun remove-hook (hook function &optional local)
"Remove from the value of HOOK the function FUNCTION.
HOOK should be a symbol, and FUNCTION may be any valid function. If
FUNCTION isn't the value of HOOK, or, if FUNCTION doesn't appear in the
list of hooks to run in HOOK, then nothing is done. See `add-hook'.
The optional third argument, LOCAL, if non-nil, says to modify
the hook's buffer-local value rather than its default value."
(or (boundp hook) (set hook nil))
(or (default-boundp hook) (set-default hook nil))
;; Do nothing if LOCAL is t but this hook has no local binding.
(unless (and local (not (local-variable-p hook)))
;; Detect the case where make-local-variable was used on a hook
;; and do what we used to do.
(when (and (local-variable-p hook)
(not (and (consp (symbol-value hook))
(memq t (symbol-value hook)))))
(setq local t))
(let ((hook-value (if local (symbol-value hook) (default-value hook))))
;; Remove the function, for both the list and the non-list cases.
(if (or (not (listp hook-value)) (eq (car hook-value) 'lambda))
(if (equal hook-value function) (setq hook-value nil))
(setq hook-value (delete function (copy-sequence hook-value))))
;; If the function is on the global hook, we need to shadow it locally
;;(when (and local (member function (default-value hook))
;; (not (member (cons 'not function) hook-value)))
;; (push (cons 'not function) hook-value))
;; Set the actual variable
(if (not local)
(set-default hook hook-value)
(if (equal hook-value '(t))
(kill-local-variable hook)
(set hook hook-value))))))
(defmacro letrec (binders &rest body)
"Bind variables according to BINDERS then eval BODY.
The value of the last form in BODY is returned.
Each element of BINDERS is a list (SYMBOL VALUEFORM) which binds
SYMBOL to the value of VALUEFORM.
All symbols are bound before the VALUEFORMs are evalled."
;; Only useful in lexical-binding mode.
;; As a special-form, we could implement it more efficiently (and cleanly,
;; making the vars actually unbound during evaluation of the binders).
(declare (debug let) (indent 1))
`(let ,(mapcar #'car binders)
,@(mapcar (lambda (binder) `(setq ,@binder)) binders)
,@body))
(defmacro with-wrapper-hook (hook args &rest body)
"Run BODY, using wrapper functions from HOOK with additional ARGS.
HOOK is an abnormal hook. Each hook function in HOOK \"wraps\"
around the preceding ones, like a set of nested `around' advices.
Each hook function should accept an argument list consisting of a
function FUN, followed by the additional arguments in ARGS.
The first hook function in HOOK is passed a FUN that, if it is called
with arguments ARGS, performs BODY (i.e., the default operation).
The FUN passed to each successive hook function is defined based
on the preceding hook functions; if called with arguments ARGS,
it does what the `with-wrapper-hook' call would do if the
preceding hook functions were the only ones present in HOOK.
Each hook function may call its FUN argument as many times as it wishes,
including never. In that case, such a hook function acts to replace
the default definition altogether, and any preceding hook functions.
Of course, a subsequent hook function may do the same thing.
Each hook function definition is used to construct the FUN passed
to the next hook function, if any. The last (or \"outermost\")
FUN is then called once."
(declare (indent 2) (debug (form sexp body))
(obsolete "use a <foo>-function variable modified by `add-function'."
"24.4"))
;; We need those two gensyms because CL's lexical scoping is not available
;; for function arguments :-(
(let ((funs (make-symbol "funs"))
(global (make-symbol "global"))
(argssym (make-symbol "args"))
(runrestofhook (make-symbol "runrestofhook")))
;; Since the hook is a wrapper, the loop has to be done via
;; recursion: a given hook function will call its parameter in order to
;; continue looping.
`(letrec ((,runrestofhook
(lambda (,funs ,global ,argssym)
;; `funs' holds the functions left on the hook and `global'
;; holds the functions left on the global part of the hook
;; (in case the hook is local).
(if (consp ,funs)
(if (eq t (car ,funs))
(funcall ,runrestofhook
(append ,global (cdr ,funs)) nil ,argssym)
(apply (car ,funs)
(apply-partially
(lambda (,funs ,global &rest ,argssym)
(funcall ,runrestofhook ,funs ,global ,argssym))
(cdr ,funs) ,global)
,argssym))
;; Once there are no more functions on the hook, run
;; the original body.
(apply (lambda ,args ,@body) ,argssym)))))
(funcall ,runrestofhook ,hook
;; The global part of the hook, if any.
,(if (symbolp hook)
`(if (local-variable-p ',hook)
(default-value ',hook)))
(list ,@args)))))
(defun add-to-list (list-var element &optional append compare-fn)
"Add ELEMENT to the value of LIST-VAR if it isn't there yet.
The test for presence of ELEMENT is done with `equal', or with
COMPARE-FN if that's non-nil.
If ELEMENT is added, it is added at the beginning of the list,
unless the optional argument APPEND is non-nil, in which case
ELEMENT is added at the end.
The return value is the new value of LIST-VAR.
This is handy to add some elements to configuration variables,
but please do not abuse it in Elisp code, where you are usually
better off using `push' or `cl-pushnew'.
If you want to use `add-to-list' on a variable that is not
defined until a certain package is loaded, you should put the
call to `add-to-list' into a hook function that will be run only
after loading the package. `eval-after-load' provides one way to
do this. In some cases other hooks, such as major mode hooks,
can do the job."
(declare
(compiler-macro
(lambda (exp)
;; FIXME: Something like this could be used for `set' as well.
(if (or (not (eq 'quote (car-safe list-var)))
(special-variable-p (cadr list-var))
(not (macroexp-const-p append)))
exp
(let* ((sym (cadr list-var))
(append (eval append))
(msg (format "`add-to-list' can't use lexical var `%s'; use `push' or `cl-pushnew'"
sym))
;; Big ugly hack so we only output a warning during
;; byte-compilation, and so we can use
;; byte-compile-not-lexical-var-p to silence the warning
;; when a defvar has been seen but not yet executed.
(warnfun (lambda ()
;; FIXME: We should also emit a warning for let-bound
;; variables with dynamic binding.
(when (assq sym byte-compile--lexical-environment)
(byte-compile-log-warning msg t :error))))
(code
(macroexp-let2 macroexp-copyable-p x element
`(if ,(if compare-fn
(progn
(require 'cl-lib)
`(cl-member ,x ,sym :test ,compare-fn))
;; For bootstrapping reasons, don't rely on
;; cl--compiler-macro-member for the base case.
`(member ,x ,sym))
,sym
,(if append
`(setq ,sym (append ,sym (list ,x)))
`(push ,x ,sym))))))
(if (not (macroexp--compiling-p))
code
`(progn
(macroexp--funcall-if-compiled ',warnfun)
,code)))))))
(if (cond
((null compare-fn)
(member element (symbol-value list-var)))
((eq compare-fn 'eq)
(memq element (symbol-value list-var)))
((eq compare-fn 'eql)
(memql element (symbol-value list-var)))
(t
(let ((lst (symbol-value list-var)))
(while (and lst
(not (funcall compare-fn element (car lst))))
(setq lst (cdr lst)))
lst)))
(symbol-value list-var)
(set list-var
(if append
(append (symbol-value list-var) (list element))
(cons element (symbol-value list-var))))))
(defun add-to-ordered-list (list-var element &optional order)
"Add ELEMENT to the value of LIST-VAR if it isn't there yet.
The test for presence of ELEMENT is done with `eq'.
The resulting list is reordered so that the elements are in the
order given by each element's numeric list order. Elements
without a numeric list order are placed at the end of the list.
If the third optional argument ORDER is a number (integer or
float), set the element's list order to the given value. If
ORDER is nil or omitted, do not change the numeric order of
ELEMENT. If ORDER has any other value, remove the numeric order
of ELEMENT if it has one.
The list order for each element is stored in LIST-VAR's
`list-order' property.
The return value is the new value of LIST-VAR."
(let ((ordering (get list-var 'list-order)))
(unless ordering
(put list-var 'list-order
(setq ordering (make-hash-table :weakness 'key :test 'eq))))
(when order
(puthash element (and (numberp order) order) ordering))
(unless (memq element (symbol-value list-var))
(set list-var (cons element (symbol-value list-var))))
(set list-var (sort (symbol-value list-var)
(lambda (a b)
(let ((oa (gethash a ordering))
(ob (gethash b ordering)))
(if (and oa ob)
(< oa ob)
oa)))))))
(defun add-to-history (history-var newelt &optional maxelt keep-all)
"Add NEWELT to the history list stored in the variable HISTORY-VAR.
Return the new history list.
If MAXELT is non-nil, it specifies the maximum length of the history.
Otherwise, the maximum history length is the value of the `history-length'
property on symbol HISTORY-VAR, if set, or the value of the `history-length'
variable.
Remove duplicates of NEWELT if `history-delete-duplicates' is non-nil.
If optional fourth arg KEEP-ALL is non-nil, add NEWELT to history even
if it is empty or a duplicate."
(unless maxelt
(setq maxelt (or (get history-var 'history-length)
history-length)))
(let ((history (symbol-value history-var))
tail)
(when (and (listp history)
(or keep-all
(not (stringp newelt))
(> (length newelt) 0))
(or keep-all
(not (equal (car history) newelt))))
(if history-delete-duplicates
(setq history (delete newelt history)))
(setq history (cons newelt history))
(when (integerp maxelt)
(if (= 0 maxelt)
(setq history nil)
(setq tail (nthcdr (1- maxelt) history))
(when (consp tail)
(setcdr tail nil)))))
(set history-var history)))
\f
;;;; Mode hooks.
(defvar delay-mode-hooks nil
"If non-nil, `run-mode-hooks' should delay running the hooks.")
(defvar delayed-mode-hooks nil
"List of delayed mode hooks waiting to be run.")
(make-variable-buffer-local 'delayed-mode-hooks)
(put 'delay-mode-hooks 'permanent-local t)
(defvar change-major-mode-after-body-hook nil
"Normal hook run in major mode functions, before the mode hooks.")
(defvar after-change-major-mode-hook nil
"Normal hook run at the very end of major mode functions.")
(defun run-mode-hooks (&rest hooks)
"Run mode hooks `delayed-mode-hooks' and HOOKS, or delay HOOKS.
If the variable `delay-mode-hooks' is non-nil, does not run any hooks,
just adds the HOOKS to the list `delayed-mode-hooks'.
Otherwise, runs hooks in the sequence: `change-major-mode-after-body-hook',
`delayed-mode-hooks' (in reverse order), HOOKS, and finally
`after-change-major-mode-hook'. Major mode functions should use
this instead of `run-hooks' when running their FOO-mode-hook."
(if delay-mode-hooks
;; Delaying case.
(dolist (hook hooks)
(push hook delayed-mode-hooks))
;; Normal case, just run the hook as before plus any delayed hooks.
(setq hooks (nconc (nreverse delayed-mode-hooks) hooks))
(setq delayed-mode-hooks nil)
(apply 'run-hooks (cons 'change-major-mode-after-body-hook hooks))
(run-hooks 'after-change-major-mode-hook)))
(defmacro delay-mode-hooks (&rest body)
"Execute BODY, but delay any `run-mode-hooks'.
These hooks will be executed by the first following call to
`run-mode-hooks' that occurs outside any `delay-mode-hooks' form.
Only affects hooks run in the current buffer."
(declare (debug t) (indent 0))
`(progn
(make-local-variable 'delay-mode-hooks)
(let ((delay-mode-hooks t))
,@body)))
;; PUBLIC: find if the current mode derives from another.
(defun derived-mode-p (&rest modes)
"Non-nil if the current major mode is derived from one of MODES.
Uses the `derived-mode-parent' property of the symbol to trace backwards."
(let ((parent major-mode))
(while (and (not (memq parent modes))
(setq parent (get parent 'derived-mode-parent))))
parent))
\f
;;;; Minor modes.
;; If a minor mode is not defined with define-minor-mode,
;; add it here explicitly.
;; isearch-mode is deliberately excluded, since you should
;; not call it yourself.
(defvar minor-mode-list '(auto-save-mode auto-fill-mode abbrev-mode
overwrite-mode view-mode
hs-minor-mode)
"List of all minor mode functions.")
(defun add-minor-mode (toggle name &optional keymap after toggle-fun)
"Register a new minor mode.
This is an XEmacs-compatibility function. Use `define-minor-mode' instead.
TOGGLE is a symbol which is the name of a buffer-local variable that
is toggled on or off to say whether the minor mode is active or not.
NAME specifies what will appear in the mode line when the minor mode
is active. NAME should be either a string starting with a space, or a
symbol whose value is such a string.
Optional KEYMAP is the keymap for the minor mode that will be added
to `minor-mode-map-alist'.
Optional AFTER specifies that TOGGLE should be added after AFTER
in `minor-mode-alist'.
Optional TOGGLE-FUN is an interactive function to toggle the mode.
It defaults to (and should by convention be) TOGGLE.
If TOGGLE has a non-nil `:included' property, an entry for the mode is
included in the mode-line minor mode menu.
If TOGGLE has a `:menu-tag', that is used for the menu item's label."
(unless (memq toggle minor-mode-list)
(push toggle minor-mode-list))
(unless toggle-fun (setq toggle-fun toggle))
(unless (eq toggle-fun toggle)
(put toggle :minor-mode-function toggle-fun))
;; Add the name to the minor-mode-alist.
(when name
(let ((existing (assq toggle minor-mode-alist)))
(if existing
(setcdr existing (list name))
(let ((tail minor-mode-alist) found)
(while (and tail (not found))
(if (eq after (caar tail))
(setq found tail)
(setq tail (cdr tail))))
(if found
(let ((rest (cdr found)))
(setcdr found nil)
(nconc found (list (list toggle name)) rest))
(push (list toggle name) minor-mode-alist))))))
;; Add the toggle to the minor-modes menu if requested.
(when (get toggle :included)
(define-key mode-line-mode-menu
(vector toggle)
(list 'menu-item
(concat
(or (get toggle :menu-tag)
(if (stringp name) name (symbol-name toggle)))
(let ((mode-name (if (symbolp name) (symbol-value name))))
(if (and (stringp mode-name) (string-match "[^ ]+" mode-name))
(concat " (" (match-string 0 mode-name) ")"))))
toggle-fun
:button (cons :toggle toggle))))
;; Add the map to the minor-mode-map-alist.
(when keymap
(let ((existing (assq toggle minor-mode-map-alist)))
(if existing
(setcdr existing keymap)
(let ((tail minor-mode-map-alist) found)
(while (and tail (not found))
(if (eq after (caar tail))
(setq found tail)
(setq tail (cdr tail))))
(if found
(let ((rest (cdr found)))
(setcdr found nil)
(nconc found (list (cons toggle keymap)) rest))
(push (cons toggle keymap) minor-mode-map-alist)))))))
\f
;;;; Load history
(defsubst autoloadp (object)
"Non-nil if OBJECT is an autoload."
(eq 'autoload (car-safe object)))
;; (defun autoload-type (object)
;; "Returns the type of OBJECT or `function' or `command' if the type is nil.
;; OBJECT should be an autoload object."
;; (when (autoloadp object)
;; (let ((type (nth 3 object)))
;; (cond ((null type) (if (nth 2 object) 'command 'function))
;; ((eq 'keymap t) 'macro)
;; (type)))))
;; (defalias 'autoload-file #'cadr
;; "Return the name of the file from which AUTOLOAD will be loaded.
;; \n\(fn AUTOLOAD)")
(defun symbol-file (symbol &optional type)
"Return the name of the file that defined SYMBOL.
The value is normally an absolute file name. It can also be nil,
if the definition is not associated with any file. If SYMBOL
specifies an autoloaded function, the value can be a relative
file name without extension.
If TYPE is nil, then any kind of definition is acceptable. If
TYPE is `defun', `defvar', or `defface', that specifies function
definition, variable definition, or face definition only."
(if (and (or (null type) (eq type 'defun))
(symbolp symbol)
(autoloadp (symbol-function symbol)))
(nth 1 (symbol-function symbol))
(let ((files load-history)
file)
(while files
(if (if type
(if (eq type 'defvar)
;; Variables are present just as their names.
(member symbol (cdr (car files)))
;; Other types are represented as (TYPE . NAME).
(member (cons type symbol) (cdr (car files))))
;; We accept all types, so look for variable def
;; and then for any other kind.
(or (member symbol (cdr (car files)))
(rassq symbol (cdr (car files)))))
(setq file (car (car files)) files nil))
(setq files (cdr files)))
file)))
(defun locate-library (library &optional nosuffix path interactive-call)
"Show the precise file name of Emacs library LIBRARY.
LIBRARY should be a relative file name of the library, a string.
It can omit the suffix (a.k.a. file-name extension) if NOSUFFIX is
nil (which is the default, see below).
This command searches the directories in `load-path' like `\\[load-library]'
to find the file that `\\[load-library] RET LIBRARY RET' would load.
Optional second arg NOSUFFIX non-nil means don't add suffixes `load-suffixes'
to the specified name LIBRARY.
If the optional third arg PATH is specified, that list of directories
is used instead of `load-path'.
When called from a program, the file name is normally returned as a
string. When run interactively, the argument INTERACTIVE-CALL is t,
and the file name is displayed in the echo area."
(interactive (list (completing-read "Locate library: "
(apply-partially
'locate-file-completion-table
load-path (get-load-suffixes)))
nil nil
t))
(let ((file (locate-file library
(or path load-path)
(append (unless nosuffix (get-load-suffixes))
load-file-rep-suffixes))))
(if interactive-call
(if file
(message "Library is file %s" (abbreviate-file-name file))
(message "No library %s in search path" library)))
file))
\f
;;;; Process stuff.
(defun start-process (name buffer program &rest program-args)
"Start a program in a subprocess. Return the process object for it.
NAME is name for process. It is modified if necessary to make it unique.
BUFFER is the buffer (or buffer name) to associate with the process.
Process output (both standard output and standard error streams) goes
at end of BUFFER, unless you specify an output stream or filter
function to handle the output. BUFFER may also be nil, meaning that
this process is not associated with any buffer.
PROGRAM is the program file name. It is searched for in `exec-path'
\(which see). If nil, just associate a pty with the buffer. Remaining
arguments are strings to give program as arguments.
If you want to separate standard output from standard error, use
`make-process' or invoke the command through a shell and redirect
one of them using the shell syntax."
(unless (fboundp 'make-process)
(error "Emacs was compiled without subprocess support"))
(apply #'make-process
(append (list :name name :buffer buffer)
(if program
(list :command (cons program program-args))))))
(defun process-lines (program &rest args)
"Execute PROGRAM with ARGS, returning its output as a list of lines.
Signal an error if the program returns with a non-zero exit status."
(with-temp-buffer
(let ((status (apply 'call-process program nil (current-buffer) nil args)))
(unless (eq status 0)
(error "%s exited with status %s" program status))
(goto-char (point-min))
(let (lines)
(while (not (eobp))
(setq lines (cons (buffer-substring-no-properties
(line-beginning-position)
(line-end-position))
lines))
(forward-line 1))
(nreverse lines)))))
(defun process-live-p (process)
"Returns non-nil if PROCESS is alive.
A process is considered alive if its status is `run', `open',
`listen', `connect' or `stop'. Value is nil if PROCESS is not a
process."
(and (processp process)
(memq (process-status process)
'(run open listen connect stop))))
;; compatibility
(defun process-kill-without-query (process &optional _flag)
"Say no query needed if PROCESS is running when Emacs is exited.
Optional second argument if non-nil says to require a query.
Value is t if a query was formerly required."
(declare (obsolete
"use `process-query-on-exit-flag' or `set-process-query-on-exit-flag'."
"22.1"))
(let ((old (process-query-on-exit-flag process)))
(set-process-query-on-exit-flag process nil)
old))
(defun process-kill-buffer-query-function ()
"Ask before killing a buffer that has a running process."
(let ((process (get-buffer-process (current-buffer))))
(or (not process)
(not (memq (process-status process) '(run stop open listen)))
(not (process-query-on-exit-flag process))
(yes-or-no-p
(format "Buffer %S has a running process; kill it? "
(buffer-name (current-buffer)))))))
(add-hook 'kill-buffer-query-functions 'process-kill-buffer-query-function)
;; process plist management
(defun process-get (process propname)
"Return the value of PROCESS' PROPNAME property.
This is the last value stored with `(process-put PROCESS PROPNAME VALUE)'."
(plist-get (process-plist process) propname))
(defun process-put (process propname value)
"Change PROCESS' PROPNAME property to VALUE.
It can be retrieved with `(process-get PROCESS PROPNAME)'."
(set-process-plist process
(plist-put (process-plist process) propname value)))
\f
;;;; Input and display facilities.
(defconst read-key-empty-map (make-sparse-keymap))
(defvar read-key-delay 0.01) ;Fast enough for 100Hz repeat rate, hopefully.
(defun read-key (&optional prompt)
"Read a key from the keyboard.
Contrary to `read-event' this will not return a raw event but instead will
obey the input decoding and translations usually done by `read-key-sequence'.
So escape sequences and keyboard encoding are taken into account.
When there's an ambiguity because the key looks like the prefix of
some sort of escape sequence, the ambiguity is resolved via `read-key-delay'."
;; This overriding-terminal-local-map binding also happens to
;; disable quail's input methods, so although read-key-sequence
;; always inherits the input method, in practice read-key does not
;; inherit the input method (at least not if it's based on quail).
(let ((overriding-terminal-local-map nil)
(overriding-local-map read-key-empty-map)
(echo-keystrokes 0)
(old-global-map (current-global-map))
(timer (run-with-idle-timer
;; Wait long enough that Emacs has the time to receive and
;; process all the raw events associated with the single-key.
;; But don't wait too long, or the user may find the delay
;; annoying (or keep hitting more keys which may then get
;; lost or misinterpreted).
;; This is only relevant for keys which Emacs perceives as
;; "prefixes", such as C-x (because of the C-x 8 map in
;; key-translate-table and the C-x @ map in function-key-map)
;; or ESC (because of terminal escape sequences in
;; input-decode-map).
read-key-delay t
(lambda ()
(let ((keys (this-command-keys-vector)))
(unless (zerop (length keys))
;; `keys' is non-empty, so the user has hit at least
;; one key; there's no point waiting any longer, even
;; though read-key-sequence thinks we should wait
;; for more input to decide how to interpret the
;; current input.
(throw 'read-key keys)))))))
(unwind-protect
(progn
(use-global-map
(let ((map (make-sparse-keymap)))
;; Don't hide the menu-bar and tool-bar entries.
(define-key map [menu-bar] (lookup-key global-map [menu-bar]))
(define-key map [tool-bar]
;; This hack avoids evaluating the :filter (Bug#9922).
(or (cdr (assq 'tool-bar global-map))
(lookup-key global-map [tool-bar])))
map))
(let* ((keys
(catch 'read-key (read-key-sequence-vector prompt nil t)))
(key (aref keys 0)))
(if (and (> (length keys) 1)
(memq key '(mode-line header-line
left-fringe right-fringe)))
(aref keys 1)
key)))
(cancel-timer timer)
(use-global-map old-global-map))))
(defvar read-passwd-map
;; BEWARE: `defconst' would purecopy it, breaking the sharing with
;; minibuffer-local-map along the way!
(let ((map (make-sparse-keymap)))
(set-keymap-parent map minibuffer-local-map)
(define-key map "\C-u" #'delete-minibuffer-contents) ;bug#12570
map)
"Keymap used while reading passwords.")
(defun read-passwd (prompt &optional confirm default)
"Read a password, prompting with PROMPT, and return it.
If optional CONFIRM is non-nil, read the password twice to make sure.
Optional DEFAULT is a default password to use instead of empty input.
This function echoes `.' for each character that the user types.
You could let-bind `read-hide-char' to another hiding character, though.
Once the caller uses the password, it can erase the password
by doing (clear-string STRING)."
(if confirm
(let (success)
(while (not success)
(let ((first (read-passwd prompt nil default))
(second (read-passwd "Confirm password: " nil default)))
(if (equal first second)
(progn
(and (arrayp second) (clear-string second))
(setq success first))
(and (arrayp first) (clear-string first))
(and (arrayp second) (clear-string second))
(message "Password not repeated accurately; please start over")
(sit-for 1))))
success)
(let ((hide-chars-fun
(lambda (beg end _len)
(clear-this-command-keys)
(setq beg (min end (max (minibuffer-prompt-end)
beg)))
(dotimes (i (- end beg))
(put-text-property (+ i beg) (+ 1 i beg)
'display (string (or read-hide-char ?.))))))
minibuf)
(minibuffer-with-setup-hook
(lambda ()
(setq minibuf (current-buffer))
;; Turn off electricity.
(setq-local post-self-insert-hook nil)
(setq-local buffer-undo-list t)
(setq-local select-active-regions nil)
(use-local-map read-passwd-map)
(setq-local inhibit-modification-hooks nil) ;bug#15501.
(setq-local show-paren-mode nil) ;bug#16091.
(add-hook 'after-change-functions hide-chars-fun nil 'local))
(unwind-protect
(let ((enable-recursive-minibuffers t)
(read-hide-char (or read-hide-char ?.)))
(read-string prompt nil t default)) ; t = "no history"
(when (buffer-live-p minibuf)
(with-current-buffer minibuf
;; Not sure why but it seems that there might be cases where the
;; minibuffer is not always properly reset later on, so undo
;; whatever we've done here (bug#11392).
(remove-hook 'after-change-functions hide-chars-fun 'local)
(kill-local-variable 'post-self-insert-hook)
;; And of course, don't keep the sensitive data around.
(erase-buffer))))))))
(defun read-number (prompt &optional default)
"Read a numeric value in the minibuffer, prompting with PROMPT.
DEFAULT specifies a default value to return if the user just types RET.
The value of DEFAULT is inserted into PROMPT.
This function is used by the `interactive' code letter `n'."
(let ((n nil)
(default1 (if (consp default) (car default) default)))
(when default1
(setq prompt
(if (string-match "\\(\\):[ \t]*\\'" prompt)
(replace-match (format " (default %s)" default1) t t prompt 1)
(replace-regexp-in-string "[ \t]*\\'"
(format " (default %s) " default1)
prompt t t))))
(while
(progn
(let ((str (read-from-minibuffer
prompt nil nil nil nil
(when default
(if (consp default)
(mapcar 'number-to-string (delq nil default))
(number-to-string default))))))
(condition-case nil
(setq n (cond
((zerop (length str)) default1)
((stringp str) (read str))))
(error nil)))
(unless (numberp n)
(message "Please enter a number.")
(sit-for 1)
t)))
n))
(defun read-char-choice (prompt chars &optional inhibit-keyboard-quit)
"Read and return one of CHARS, prompting for PROMPT.
Any input that is not one of CHARS is ignored.
If optional argument INHIBIT-KEYBOARD-QUIT is non-nil, ignore
keyboard-quit events while waiting for a valid input."
(unless (consp chars)
(error "Called `read-char-choice' without valid char choices"))
(let (char done show-help (helpbuf " *Char Help*"))
(let ((cursor-in-echo-area t)
(executing-kbd-macro executing-kbd-macro)
(esc-flag nil))
(save-window-excursion ; in case we call help-form-show
(while (not done)
(unless (get-text-property 0 'face prompt)
(setq prompt (propertize prompt 'face 'minibuffer-prompt)))
(setq char (let ((inhibit-quit inhibit-keyboard-quit))
(read-key prompt)))
(and show-help (buffer-live-p (get-buffer helpbuf))
(kill-buffer helpbuf))
(cond
((not (numberp char)))
;; If caller has set help-form, that's enough.
;; They don't explicitly have to add help-char to chars.
((and help-form
(eq char help-char)
(setq show-help t)
(help-form-show)))
((memq char chars)
(setq done t))
((and executing-kbd-macro (= char -1))
;; read-event returns -1 if we are in a kbd macro and
;; there are no more events in the macro. Attempt to
;; get an event interactively.
(setq executing-kbd-macro nil))
((not inhibit-keyboard-quit)
(cond
((and (null esc-flag) (eq char ?\e))
(setq esc-flag t))
((memq char '(?\C-g ?\e))
(keyboard-quit))))))))
;; Display the question with the answer. But without cursor-in-echo-area.
(message "%s%s" prompt (char-to-string char))
char))
(defun sit-for (seconds &optional nodisp obsolete)
"Redisplay, then wait for SECONDS seconds. Stop when input is available.
SECONDS may be a floating-point value.
\(On operating systems that do not support waiting for fractions of a
second, floating-point values are rounded down to the nearest integer.)
If optional arg NODISP is t, don't redisplay, just wait for input.
Redisplay does not happen if input is available before it starts.
Value is t if waited the full time with no input arriving, and nil otherwise.
An obsolete, but still supported form is
\(sit-for SECONDS &optional MILLISECONDS NODISP)
where the optional arg MILLISECONDS specifies an additional wait period,
in milliseconds; this was useful when Emacs was built without
floating point support."
(declare (advertised-calling-convention (seconds &optional nodisp) "22.1"))
;; This used to be implemented in C until the following discussion:
;; http://lists.gnu.org/archive/html/emacs-devel/2006-07/msg00401.html
;; Then it was moved here using an implementation based on an idle timer,
;; which was then replaced by the use of read-event.
(if (numberp nodisp)
(setq seconds (+ seconds (* 1e-3 nodisp))
nodisp obsolete)
(if obsolete (setq nodisp obsolete)))
(cond
(noninteractive
(sleep-for seconds)
t)
((input-pending-p t)
nil)
((<= seconds 0)
(or nodisp (redisplay)))
(t
(or nodisp (redisplay))
;; FIXME: we should not read-event here at all, because it's much too
;; difficult to reliably "undo" a read-event by pushing it onto
;; unread-command-events.
;; For bug#14782, we need read-event to do the keyboard-coding-system
;; decoding (hence non-nil as second arg under POSIX ttys).
;; For bug#15614, we need read-event not to inherit-input-method.
;; So we temporarily suspend input-method-function.
(let ((read (let ((input-method-function nil))
(read-event nil t seconds))))
(or (null read)
(progn
;; https://lists.gnu.org/archive/html/emacs-devel/2006-10/msg00394.html
;; We want `read' appear in the next command's this-command-event
;; but not in the current one.
;; By pushing (cons t read), we indicate that `read' has not
;; yet been recorded in this-command-keys, so it will be recorded
;; next time it's read.
;; And indeed the `seconds' argument to read-event correctly
;; prevented recording this event in the current command's
;; this-command-keys.
(push (cons t read) unread-command-events)
nil))))))
;; Behind display-popup-menus-p test.
(declare-function x-popup-dialog "menu.c" (position contents &optional header))
(defun y-or-n-p (prompt)
"Ask user a \"y or n\" question. Return t if answer is \"y\".
PROMPT is the string to display to ask the question. It should
end in a space; `y-or-n-p' adds \"(y or n) \" to it.
No confirmation of the answer is requested; a single character is
enough. SPC also means yes, and DEL means no.
To be precise, this function translates user input into responses
by consulting the bindings in `query-replace-map'; see the
documentation of that variable for more information. In this
case, the useful bindings are `act', `skip', `recenter',
`scroll-up', `scroll-down', and `quit'.
An `act' response means yes, and a `skip' response means no.
A `quit' response means to invoke `keyboard-quit'.
If the user enters `recenter', `scroll-up', or `scroll-down'
responses, perform the requested window recentering or scrolling
and ask again.
Under a windowing system a dialog box will be used if `last-nonmenu-event'
is nil and `use-dialog-box' is non-nil."
;; ¡Beware! when I tried to edebug this code, Emacs got into a weird state
;; where all the keys were unbound (i.e. it somehow got triggered
;; within read-key, apparently). I had to kill it.
(let ((answer 'recenter)
(padded (lambda (prompt &optional dialog)
(let ((l (length prompt)))
(concat prompt
(if (or (zerop l) (eq ?\s (aref prompt (1- l))))
"" " ")
(if dialog "" "(y or n) "))))))
(cond
(noninteractive
(setq prompt (funcall padded prompt))
(let ((temp-prompt prompt))
(while (not (memq answer '(act skip)))
(let ((str (read-string temp-prompt)))
(cond ((member str '("y" "Y")) (setq answer 'act))
((member str '("n" "N")) (setq answer 'skip))
(t (setq temp-prompt (concat "Please answer y or n. "
prompt))))))))
((and (display-popup-menus-p)
(listp last-nonmenu-event)
use-dialog-box)
(setq prompt (funcall padded prompt t)
answer (x-popup-dialog t `(,prompt ("Yes" . act) ("No" . skip)))))
(t
(setq prompt (funcall padded prompt))
(while
(let* ((scroll-actions '(recenter scroll-up scroll-down
scroll-other-window scroll-other-window-down))
(key
(let ((cursor-in-echo-area t))
(when minibuffer-auto-raise
(raise-frame (window-frame (minibuffer-window))))
(read-key (propertize (if (memq answer scroll-actions)
prompt
(concat "Please answer y or n. "
prompt))
'face 'minibuffer-prompt)))))
(setq answer (lookup-key query-replace-map (vector key) t))
(cond
((memq answer '(skip act)) nil)
((eq answer 'recenter)
(recenter) t)
((eq answer 'scroll-up)
(ignore-errors (scroll-up-command)) t)
((eq answer 'scroll-down)
(ignore-errors (scroll-down-command)) t)
((eq answer 'scroll-other-window)
(ignore-errors (scroll-other-window)) t)
((eq answer 'scroll-other-window-down)
(ignore-errors (scroll-other-window-down)) t)
((or (memq answer '(exit-prefix quit)) (eq key ?\e))
(signal 'quit nil) t)
(t t)))
(ding)
(discard-input))))
(let ((ret (eq answer 'act)))
(unless noninteractive
(message "%s%c" prompt (if ret ?y ?n)))
ret)))
\f
;;; Atomic change groups.
(defmacro atomic-change-group (&rest body)
"Perform BODY as an atomic change group.
This means that if BODY exits abnormally,
all of its changes to the current buffer are undone.
This works regardless of whether undo is enabled in the buffer.
This mechanism is transparent to ordinary use of undo;
if undo is enabled in the buffer and BODY succeeds, the
user can undo the change normally."
(declare (indent 0) (debug t))
(let ((handle (make-symbol "--change-group-handle--"))
(success (make-symbol "--change-group-success--")))
`(let ((,handle (prepare-change-group))
;; Don't truncate any undo data in the middle of this.
(undo-outer-limit nil)
(undo-limit most-positive-fixnum)
(undo-strong-limit most-positive-fixnum)
(,success nil))
(unwind-protect
(progn
;; This is inside the unwind-protect because
;; it enables undo if that was disabled; we need
;; to make sure that it gets disabled again.
(activate-change-group ,handle)
,@body
(setq ,success t))
;; Either of these functions will disable undo
;; if it was disabled before.
(if ,success
(accept-change-group ,handle)
(cancel-change-group ,handle))))))
(defun prepare-change-group (&optional buffer)
"Return a handle for the current buffer's state, for a change group.
If you specify BUFFER, make a handle for BUFFER's state instead.
Pass the handle to `activate-change-group' afterward to initiate
the actual changes of the change group.
To finish the change group, call either `accept-change-group' or
`cancel-change-group' passing the same handle as argument. Call
`accept-change-group' to accept the changes in the group as final;
call `cancel-change-group' to undo them all. You should use
`unwind-protect' to make sure the group is always finished. The call
to `activate-change-group' should be inside the `unwind-protect'.
Once you finish the group, don't use the handle again--don't try to
finish the same group twice. For a simple example of correct use, see
the source code of `atomic-change-group'.
The handle records only the specified buffer. To make a multibuffer
change group, call this function once for each buffer you want to
cover, then use `nconc' to combine the returned values, like this:
(nconc (prepare-change-group buffer-1)
(prepare-change-group buffer-2))
You can then activate that multibuffer change group with a single
call to `activate-change-group' and finish it with a single call
to `accept-change-group' or `cancel-change-group'."
(if buffer
(list (cons buffer (with-current-buffer buffer buffer-undo-list)))
(list (cons (current-buffer) buffer-undo-list))))
(defun activate-change-group (handle)
"Activate a change group made with `prepare-change-group' (which see)."
(dolist (elt handle)
(with-current-buffer (car elt)
(if (eq buffer-undo-list t)
(setq buffer-undo-list nil)))))
(defun accept-change-group (handle)
"Finish a change group made with `prepare-change-group' (which see).
This finishes the change group by accepting its changes as final."
(dolist (elt handle)
(with-current-buffer (car elt)
(if (eq (cdr elt) t)
(setq buffer-undo-list t)))))
(defun cancel-change-group (handle)
"Finish a change group made with `prepare-change-group' (which see).
This finishes the change group by reverting all of its changes."
(dolist (elt handle)
(with-current-buffer (car elt)
(setq elt (cdr elt))
(save-restriction
;; Widen buffer temporarily so if the buffer was narrowed within
;; the body of `atomic-change-group' all changes can be undone.
(widen)
(let ((old-car
(if (consp elt) (car elt)))
(old-cdr
(if (consp elt) (cdr elt))))
;; Temporarily truncate the undo log at ELT.
(when (consp elt)
(setcar elt nil) (setcdr elt nil))
(unless (eq last-command 'undo) (undo-start))
;; Make sure there's no confusion.
(when (and (consp elt) (not (eq elt (last pending-undo-list))))
(error "Undoing to some unrelated state"))
;; Undo it all.
(save-excursion
(while (listp pending-undo-list) (undo-more 1)))
;; Reset the modified cons cell ELT to its original content.
(when (consp elt)
(setcar elt old-car)
(setcdr elt old-cdr))
;; Revert the undo info to what it was when we grabbed the state.
(setq buffer-undo-list elt))))))
\f
;;;; Display-related functions.
;; For compatibility.
(define-obsolete-function-alias 'redraw-modeline
'force-mode-line-update "24.3")
(defun momentary-string-display (string pos &optional exit-char message)
"Momentarily display STRING in the buffer at POS.
Display remains until next event is input.
If POS is a marker, only its position is used; its buffer is ignored.
Optional third arg EXIT-CHAR can be a character, event or event
description list. EXIT-CHAR defaults to SPC. If the input is
EXIT-CHAR it is swallowed; otherwise it is then available as
input (as a command if nothing else).
Display MESSAGE (optional fourth arg) in the echo area.
If MESSAGE is nil, instructions to type EXIT-CHAR are displayed there."
(or exit-char (setq exit-char ?\s))
(let ((ol (make-overlay pos pos))
(str (copy-sequence string)))
(unwind-protect
(progn
(save-excursion
(overlay-put ol 'after-string str)
(goto-char pos)
;; To avoid trouble with out-of-bounds position
(setq pos (point))
;; If the string end is off screen, recenter now.
(if (<= (window-end nil t) pos)
(recenter (/ (window-height) 2))))
(message (or message "Type %s to continue editing.")
(single-key-description exit-char))
(let ((event (read-key)))
;; `exit-char' can be an event, or an event description list.
(or (eq event exit-char)
(eq event (event-convert-list exit-char))
(setq unread-command-events
(append (this-single-command-raw-keys))))))
(delete-overlay ol))))
\f
;;;; Overlay operations
(defun copy-overlay (o)
"Return a copy of overlay O."
(let ((o1 (if (overlay-buffer o)
(make-overlay (overlay-start o) (overlay-end o)
;; FIXME: there's no easy way to find the
;; insertion-type of the two markers.
(overlay-buffer o))
(let ((o1 (make-overlay (point-min) (point-min))))
(delete-overlay o1)
o1)))
(props (overlay-properties o)))
(while props
(overlay-put o1 (pop props) (pop props)))
o1))
(defun remove-overlays (&optional beg end name val)
"Clear BEG and END of overlays whose property NAME has value VAL.
Overlays might be moved and/or split.
BEG and END default respectively to the beginning and end of buffer."
;; This speeds up the loops over overlays.
(unless beg (setq beg (point-min)))
(unless end (setq end (point-max)))
(overlay-recenter end)
(if (< end beg)
(setq beg (prog1 end (setq end beg))))
(save-excursion
(dolist (o (overlays-in beg end))
(when (eq (overlay-get o name) val)
;; Either push this overlay outside beg...end
;; or split it to exclude beg...end
;; or delete it entirely (if it is contained in beg...end).
(if (< (overlay-start o) beg)
(if (> (overlay-end o) end)
(progn
(move-overlay (copy-overlay o)
(overlay-start o) beg)
(move-overlay o end (overlay-end o)))
(move-overlay o (overlay-start o) beg))
(if (> (overlay-end o) end)
(move-overlay o end (overlay-end o))
(delete-overlay o)))))))
\f
;;;; Miscellanea.
(defvar suspend-hook nil
"Normal hook run by `suspend-emacs', before suspending.")
(defvar suspend-resume-hook nil
"Normal hook run by `suspend-emacs', after Emacs is continued.")
(defvar temp-buffer-show-hook nil
"Normal hook run by `with-output-to-temp-buffer' after displaying the buffer.
When the hook runs, the temporary buffer is current, and the window it
was displayed in is selected.")
(defvar temp-buffer-setup-hook nil
"Normal hook run by `with-output-to-temp-buffer' at the start.
When the hook runs, the temporary buffer is current.
This hook is normally set up with a function to put the buffer in Help
mode.")
(defconst user-emacs-directory
(if (eq system-type 'ms-dos)
;; MS-DOS cannot have initial dot.
"~/_emacs.d/"
"~/.emacs.d/")
"Directory beneath which additional per-user Emacs-specific files are placed.
Various programs in Emacs store information in this directory.
Note that this should end with a directory separator.
See also `locate-user-emacs-file'.")
\f
;;;; Misc. useful functions.
(defsubst buffer-narrowed-p ()
"Return non-nil if the current buffer is narrowed."
(/= (- (point-max) (point-min)) (buffer-size)))
(defun find-tag-default-bounds ()
"Determine the boundaries of the default tag, based on text at point.
Return a cons cell with the beginning and end of the found tag.
If there is no plausible default, return nil."
(let (from to bound)
(when (or (progn
;; Look at text around `point'.
(save-excursion
(skip-syntax-backward "w_") (setq from (point)))
(save-excursion
(skip-syntax-forward "w_") (setq to (point)))
(> to from))
;; Look between `line-beginning-position' and `point'.
(save-excursion
(and (setq bound (line-beginning-position))
(skip-syntax-backward "^w_" bound)
(> (setq to (point)) bound)
(skip-syntax-backward "w_")
(setq from (point))))
;; Look between `point' and `line-end-position'.
(save-excursion
(and (setq bound (line-end-position))
(skip-syntax-forward "^w_" bound)
(< (setq from (point)) bound)
(skip-syntax-forward "w_")
(setq to (point)))))
(cons from to))))
(defun find-tag-default ()
"Determine default tag to search for, based on text at point.
If there is no plausible default, return nil."
(let ((bounds (find-tag-default-bounds)))
(when bounds
(buffer-substring-no-properties (car bounds) (cdr bounds)))))
(defun find-tag-default-as-regexp ()
"Return regexp that matches the default tag at point.
If there is no tag at point, return nil.
When in a major mode that does not provide its own
`find-tag-default-function', return a regexp that matches the
symbol at point exactly."
(let ((tag (funcall (or find-tag-default-function
(get major-mode 'find-tag-default-function)
'find-tag-default))))
(if tag (regexp-quote tag))))
(defun find-tag-default-as-symbol-regexp ()
"Return regexp that matches the default tag at point as symbol.
If there is no tag at point, return nil.
When in a major mode that does not provide its own
`find-tag-default-function', return a regexp that matches the
symbol at point exactly."
(let ((tag-regexp (find-tag-default-as-regexp)))
(if (and tag-regexp
(eq (or find-tag-default-function
(get major-mode 'find-tag-default-function)
'find-tag-default)
'find-tag-default))
(format "\\_<%s\\_>" tag-regexp)
tag-regexp)))
(defun play-sound (sound)
"SOUND is a list of the form `(sound KEYWORD VALUE...)'.
The following keywords are recognized:
:file FILE - read sound data from FILE. If FILE isn't an
absolute file name, it is searched in `data-directory'.
:data DATA - read sound data from string DATA.
Exactly one of :file or :data must be present.
:volume VOL - set volume to VOL. VOL must an integer in the
range 0..100 or a float in the range 0..1.0. If not specified,
don't change the volume setting of the sound device.
:device DEVICE - play sound on DEVICE. If not specified,
a system-dependent default device name is used.
Note: :data and :device are currently not supported on Windows."
(if (fboundp 'play-sound-internal)
(play-sound-internal sound)
(error "This Emacs binary lacks sound support")))
(declare-function w32-shell-dos-semantics "w32-fns" nil)
(defun shell-quote-argument (argument)
"Quote ARGUMENT for passing as argument to an inferior shell."
(cond
((eq system-type 'ms-dos)
;; Quote using double quotes, but escape any existing quotes in
;; the argument with backslashes.
(let ((result "")
(start 0)
end)
(if (or (null (string-match "[^\"]" argument))
(< (match-end 0) (length argument)))
(while (string-match "[\"]" argument start)
(setq end (match-beginning 0)
result (concat result (substring argument start end)
"\\" (substring argument end (1+ end)))
start (1+ end))))
(concat "\"" result (substring argument start) "\"")))
((and (eq system-type 'windows-nt) (w32-shell-dos-semantics))
;; First, quote argument so that CommandLineToArgvW will
;; understand it. See
;; http://msdn.microsoft.com/en-us/library/17w5ykft%28v=vs.85%29.aspx
;; After we perform that level of quoting, escape shell
;; metacharacters so that cmd won't mangle our argument. If the
;; argument contains no double quote characters, we can just
;; surround it with double quotes. Otherwise, we need to prefix
;; each shell metacharacter with a caret.
(setq argument
;; escape backslashes at end of string
(replace-regexp-in-string
"\\(\\\\*\\)$"
"\\1\\1"
;; escape backslashes and quotes in string body
(replace-regexp-in-string
"\\(\\\\*\\)\""
"\\1\\1\\\\\""
argument)))
(if (string-match "[%!\"]" argument)
(concat
"^\""
(replace-regexp-in-string
"\\([%!()\"<>&|^]\\)"
"^\\1"
argument)
"^\"")
(concat "\"" argument "\"")))
(t
(if (equal argument "")
"''"
;; Quote everything except POSIX filename characters.
;; This should be safe enough even for really weird shells.
(replace-regexp-in-string
"\n" "'\n'"
(replace-regexp-in-string "[^-0-9a-zA-Z_./\n]" "\\\\\\&" argument))))
))
(defun string-or-null-p (object)
"Return t if OBJECT is a string or nil.
Otherwise, return nil."
(or (stringp object) (null object)))
(defun booleanp (object)
"Return t if OBJECT is one of the two canonical boolean values: t or nil.
Otherwise, return nil."
(and (memq object '(nil t)) t))
(defun special-form-p (object)
"Non-nil if and only if OBJECT is a special form."
(if (and (symbolp object) (fboundp object))
(setq object (indirect-function object)))
(and (subrp object) (eq (cdr (subr-arity object)) 'unevalled)))
(defun macrop (object)
"Non-nil if and only if OBJECT is a macro."
(let ((def (indirect-function object)))
(when (consp def)
(or (eq 'macro (car def))
(and (autoloadp def) (memq (nth 4 def) '(macro t)))))))
(defun field-at-pos (pos)
"Return the field at position POS, taking stickiness etc into account."
(let ((raw-field (get-char-property (field-beginning pos) 'field)))
(if (eq raw-field 'boundary)
(get-char-property (1- (field-end pos)) 'field)
raw-field)))
(defun sha1 (object &optional start end binary)
"Return the SHA1 (Secure Hash Algorithm) of an OBJECT.
OBJECT is either a string or a buffer. Optional arguments START and
END are character positions specifying which portion of OBJECT for
computing the hash. If BINARY is non-nil, return a string in binary
form."
(secure-hash 'sha1 object start end binary))
(defun function-get (f prop &optional autoload)
"Return the value of property PROP of function F.
If AUTOLOAD is non-nil and F is autoloaded, try to autoload it
in the hope that it will set PROP. If AUTOLOAD is `macro', only do it
if it's an autoloaded macro."
(let ((val nil))
(while (and (symbolp f)
(null (setq val (get f prop)))
(fboundp f))
(let ((fundef (symbol-function f)))
(if (and autoload (autoloadp fundef)
(not (equal fundef
(autoload-do-load fundef f
(if (eq autoload 'macro)
'macro)))))
nil ;Re-try `get' on the same `f'.
(setq f fundef))))
val))
\f
;;;; Support for yanking and text properties.
;; Why here in subr.el rather than in simple.el? --Stef
(defvar yank-handled-properties)
(defvar yank-excluded-properties)
(defun remove-yank-excluded-properties (start end)
"Process text properties between START and END, inserted for a `yank'.
Perform the handling specified by `yank-handled-properties', then
remove properties specified by `yank-excluded-properties'."
(let ((inhibit-read-only t))
(dolist (handler yank-handled-properties)
(let ((prop (car handler))
(fun (cdr handler))
(run-start start))
(while (< run-start end)
(let ((value (get-text-property run-start prop))
(run-end (next-single-property-change
run-start prop nil end)))
(funcall fun value run-start run-end)
(setq run-start run-end)))))
(with-silent-modifications
(if (eq yank-excluded-properties t)
(set-text-properties start end nil)
(remove-list-of-text-properties start end yank-excluded-properties)))))
(defvar yank-undo-function)
(defun insert-for-yank (string)
"Call `insert-for-yank-1' repetitively for each `yank-handler' segment.
See `insert-for-yank-1' for more details."
(let (to)
(while (setq to (next-single-property-change 0 'yank-handler string))
(insert-for-yank-1 (substring string 0 to))
(setq string (substring string to))))
(insert-for-yank-1 string))
(defun insert-for-yank-1 (string)
"Insert STRING at point for the `yank' command.
This function is like `insert', except it honors the variables
`yank-handled-properties' and `yank-excluded-properties', and the
`yank-handler' text property.
Properties listed in `yank-handled-properties' are processed,
then those listed in `yank-excluded-properties' are discarded.
If STRING has a non-nil `yank-handler' property on its first
character, the normal insert behavior is altered. The value of
the `yank-handler' property must be a list of one to four
elements, of the form (FUNCTION PARAM NOEXCLUDE UNDO).
FUNCTION, if non-nil, should be a function of one argument, an
object to insert; it is called instead of `insert'.
PARAM, if present and non-nil, replaces STRING as the argument to
FUNCTION or `insert'; e.g. if FUNCTION is `yank-rectangle', PARAM
may be a list of strings to insert as a rectangle.
If NOEXCLUDE is present and non-nil, the normal removal of
`yank-excluded-properties' is not performed; instead FUNCTION is
responsible for the removal. This may be necessary if FUNCTION
adjusts point before or after inserting the object.
UNDO, if present and non-nil, should be a function to be called
by `yank-pop' to undo the insertion of the current object. It is
given two arguments, the start and end of the region. FUNCTION
may set `yank-undo-function' to override UNDO."
(let* ((handler (and (stringp string)
(get-text-property 0 'yank-handler string)))
(param (or (nth 1 handler) string))
(opoint (point))
(inhibit-read-only inhibit-read-only)
end)
(setq yank-undo-function t)
(if (nth 0 handler) ; FUNCTION
(funcall (car handler) param)
(insert param))
(setq end (point))
;; Prevent read-only properties from interfering with the
;; following text property changes.
(setq inhibit-read-only t)
(unless (nth 2 handler) ; NOEXCLUDE
(remove-yank-excluded-properties opoint end))
;; If last inserted char has properties, mark them as rear-nonsticky.
(if (and (> end opoint)
(text-properties-at (1- end)))
(put-text-property (1- end) end 'rear-nonsticky t))
(if (eq yank-undo-function t) ; not set by FUNCTION
(setq yank-undo-function (nth 3 handler))) ; UNDO
(if (nth 4 handler) ; COMMAND
(setq this-command (nth 4 handler)))))
(defun insert-buffer-substring-no-properties (buffer &optional start end)
"Insert before point a substring of BUFFER, without text properties.
BUFFER may be a buffer or a buffer name.
Arguments START and END are character positions specifying the substring.
They default to the values of (point-min) and (point-max) in BUFFER."
(let ((opoint (point)))
(insert-buffer-substring buffer start end)
(let ((inhibit-read-only t))
(set-text-properties opoint (point) nil))))
(defun insert-buffer-substring-as-yank (buffer &optional start end)
"Insert before point a part of BUFFER, stripping some text properties.
BUFFER may be a buffer or a buffer name.
Arguments START and END are character positions specifying the substring.
They default to the values of (point-min) and (point-max) in BUFFER.
Before insertion, process text properties according to
`yank-handled-properties' and `yank-excluded-properties'."
;; Since the buffer text should not normally have yank-handler properties,
;; there is no need to handle them here.
(let ((opoint (point)))
(insert-buffer-substring buffer start end)
(remove-yank-excluded-properties opoint (point))))
(defun yank-handle-font-lock-face-property (face start end)
"If `font-lock-defaults' is nil, apply FACE as a `face' property.
START and END denote the start and end of the text to act on.
Do nothing if FACE is nil."
(and face
(null font-lock-defaults)
(put-text-property start end 'face face)))
;; This removes `mouse-face' properties in *Help* buffer buttons:
;; http://lists.gnu.org/archive/html/emacs-devel/2002-04/msg00648.html
(defun yank-handle-category-property (category start end)
"Apply property category CATEGORY's properties between START and END."
(when category
(let ((start2 start))
(while (< start2 end)
(let ((end2 (next-property-change start2 nil end))
(original (text-properties-at start2)))
(set-text-properties start2 end2 (symbol-plist category))
(add-text-properties start2 end2 original)
(setq start2 end2))))))
\f
;;;; Synchronous shell commands.
(defun start-process-shell-command (name buffer &rest args)
"Start a program in a subprocess. Return the process object for it.
NAME is name for process. It is modified if necessary to make it unique.
BUFFER is the buffer (or buffer name) to associate with the process.
Process output goes at end of that buffer, unless you specify
an output stream or filter function to handle the output.
BUFFER may be also nil, meaning that this process is not associated
with any buffer
COMMAND is the shell command to run.
An old calling convention accepted any number of arguments after COMMAND,
which were just concatenated to COMMAND. This is still supported but strongly
discouraged."
(declare (advertised-calling-convention (name buffer command) "23.1"))
;; We used to use `exec' to replace the shell with the command,
;; but that failed to handle (...) and semicolon, etc.
(start-process name buffer shell-file-name shell-command-switch
(mapconcat 'identity args " ")))
(defun start-file-process-shell-command (name buffer &rest args)
"Start a program in a subprocess. Return the process object for it.
Similar to `start-process-shell-command', but calls `start-file-process'."
(declare (advertised-calling-convention (name buffer command) "23.1"))
(start-file-process
name buffer
(if (file-remote-p default-directory) "/bin/sh" shell-file-name)
(if (file-remote-p default-directory) "-c" shell-command-switch)
(mapconcat 'identity args " ")))
(defun call-process-shell-command (command &optional infile buffer display
&rest args)
"Execute the shell command COMMAND synchronously in separate process.
The remaining arguments are optional.
The program's input comes from file INFILE (nil means `/dev/null').
Insert output in BUFFER before point; t means current buffer;
nil for BUFFER means discard it; 0 means discard and don't wait.
BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
REAL-BUFFER says what to do with standard output, as above,
while STDERR-FILE says what to do with standard error in the child.
STDERR-FILE may be nil (discard standard error output),
t (mix it with ordinary output), or a file name string.
Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted.
Wildcards and redirection are handled as usual in the shell.
If BUFFER is 0, `call-process-shell-command' returns immediately with value nil.
Otherwise it waits for COMMAND to terminate and returns a numeric exit
status or a signal description string.
If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.
An old calling convention accepted any number of arguments after DISPLAY,
which were just concatenated to COMMAND. This is still supported but strongly
discouraged."
(declare (advertised-calling-convention
(command &optional infile buffer display) "24.5"))
;; We used to use `exec' to replace the shell with the command,
;; but that failed to handle (...) and semicolon, etc.
(call-process shell-file-name
infile buffer display
shell-command-switch
(mapconcat 'identity (cons command args) " ")))
(defun process-file-shell-command (command &optional infile buffer display
&rest args)
"Process files synchronously in a separate process.
Similar to `call-process-shell-command', but calls `process-file'."
(declare (advertised-calling-convention
(command &optional infile buffer display) "24.5"))
(process-file
(if (file-remote-p default-directory) "/bin/sh" shell-file-name)
infile buffer display
(if (file-remote-p default-directory) "-c" shell-command-switch)
(mapconcat 'identity (cons command args) " ")))
\f
;;;; Lisp macros to do various things temporarily.
(defmacro track-mouse (&rest body)
"Evaluate BODY with mouse movement events enabled.
Within a `track-mouse' form, mouse motion generates input events that
you can read with `read-event'.
Normally, mouse motion is ignored."
(declare (debug t) (indent 0))
`(internal--track-mouse (lambda () ,@body)))
(defmacro with-current-buffer (buffer-or-name &rest body)
"Execute the forms in BODY with BUFFER-OR-NAME temporarily current.
BUFFER-OR-NAME must be a buffer or the name of an existing buffer.
The value returned is the value of the last form in BODY. See
also `with-temp-buffer'."
(declare (indent 1) (debug t))
`(save-current-buffer
(set-buffer ,buffer-or-name)
,@body))
(defun internal--before-with-selected-window (window)
(let ((other-frame (window-frame window)))
(list window (selected-window)
;; Selecting a window on another frame also changes that
;; frame's frame-selected-window. We must save&restore it.
(unless (eq (selected-frame) other-frame)
(frame-selected-window other-frame))
;; Also remember the top-frame if on ttys.
(unless (eq (selected-frame) other-frame)
(tty-top-frame other-frame)))))
(defun internal--after-with-selected-window (state)
;; First reset frame-selected-window.
(when (window-live-p (nth 2 state))
;; We don't use set-frame-selected-window because it does not
;; pass the `norecord' argument to Fselect_window.
(select-window (nth 2 state) 'norecord)
(and (frame-live-p (nth 3 state))
(not (eq (tty-top-frame) (nth 3 state)))
(select-frame (nth 3 state) 'norecord)))
;; Then reset the actual selected-window.
(when (window-live-p (nth 1 state))
(select-window (nth 1 state) 'norecord)))
(defmacro with-selected-window (window &rest body)
"Execute the forms in BODY with WINDOW as the 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 of each frame. It does not change the order of
recently selected windows. 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. If the selected window is no
longer live, then whatever window is selected at the end of BODY
remains selected.
This macro uses `save-current-buffer' to save and restore the
current buffer, since otherwise its normal operation could
potentially make a different buffer current. It does not alter
the buffer list ordering."
(declare (indent 1) (debug t))
`(let ((save-selected-window--state
(internal--before-with-selected-window ,window)))
(save-current-buffer
(unwind-protect
(progn (select-window (car save-selected-window--state) 'norecord)
,@body)
(internal--after-with-selected-window save-selected-window--state)))))
(defmacro with-selected-frame (frame &rest body)
"Execute the forms in BODY with FRAME as the selected frame.
The value returned is the value of the last form in BODY.
This macro saves and restores the selected frame, and changes the
order of neither the recently selected windows nor the buffers in
the buffer list."
(declare (indent 1) (debug t))
(let ((old-frame (make-symbol "old-frame"))
(old-buffer (make-symbol "old-buffer")))
`(let ((,old-frame (selected-frame))
(,old-buffer (current-buffer)))
(unwind-protect
(progn (select-frame ,frame 'norecord)
,@body)
(when (frame-live-p ,old-frame)
(select-frame ,old-frame 'norecord))
(when (buffer-live-p ,old-buffer)
(set-buffer ,old-buffer))))))
(defmacro save-window-excursion (&rest body)
"Execute BODY, then restore previous window configuration.
This macro saves the window configuration on the selected frame,
executes BODY, then calls `set-window-configuration' to restore
the saved window configuration. The return value is the last
form in BODY. The window configuration is also restored if BODY
exits nonlocally.
BEWARE: Most uses of this macro introduce bugs.
E.g. it should not be used to try and prevent some code from opening
a new window, since that window may sometimes appear in another frame,
in which case `save-window-excursion' cannot help."
(declare (indent 0) (debug t))
(let ((c (make-symbol "wconfig")))
`(let ((,c (current-window-configuration)))
(unwind-protect (progn ,@body)
(set-window-configuration ,c)))))
(defun internal-temp-output-buffer-show (buffer)
"Internal function for `with-output-to-temp-buffer'."
(with-current-buffer buffer
(set-buffer-modified-p nil)
(goto-char (point-min)))
(if temp-buffer-show-function
(funcall temp-buffer-show-function buffer)
(with-current-buffer buffer
(let* ((window
(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)))
(display-buffer buffer)))
(frame (and window (window-frame window))))
(when window
(unless (eq frame (selected-frame))
(make-frame-visible frame))
(setq minibuffer-scroll-window window)
(set-window-hscroll window 0)
;; Don't try this with NOFORCE non-nil!
(set-window-start window (point-min) t)
;; This should not be necessary.
(set-window-point window (point-min))
;; Run `temp-buffer-show-hook', with the chosen window selected.
(with-selected-window window
(run-hooks 'temp-buffer-show-hook))))))
;; Return nil.
nil)
;; Doc is very similar to with-temp-buffer-window.
(defmacro with-output-to-temp-buffer (bufname &rest body)
"Bind `standard-output' to buffer BUFNAME, eval BODY, then show that buffer.
This construct makes buffer BUFNAME empty before running BODY.
It does not make the buffer current for BODY.
Instead it binds `standard-output' to that buffer, so that output
generated with `prin1' and similar functions in BODY goes into
the buffer.
At the end of BODY, this marks buffer BUFNAME unmodified and displays
it in a window, but does not select it. The normal way to do this is
by calling `display-buffer', then running `temp-buffer-show-hook'.
However, if `temp-buffer-show-function' is non-nil, it calls that
function instead (and does not run `temp-buffer-show-hook'). The
function gets one argument, the buffer to display.
The return value of `with-output-to-temp-buffer' is the value of the
last form in BODY. If BODY does not finish normally, the buffer
BUFNAME is not displayed.
This runs the hook `temp-buffer-setup-hook' before BODY,
with the buffer BUFNAME temporarily current. It runs the hook
`temp-buffer-show-hook' after displaying buffer BUFNAME, with that
buffer temporarily current, and the window that was used to display it
temporarily selected. But it doesn't run `temp-buffer-show-hook'
if it uses `temp-buffer-show-function'.
By default, the setup hook puts the buffer into Help mode before running BODY.
If BODY does not change the major mode, the show hook makes the buffer
read-only, and scans it for function and variable names to make them into
clickable cross-references.
See the related form `with-temp-buffer-window'."
(declare (debug t))
(let ((old-dir (make-symbol "old-dir"))
(buf (make-symbol "buf")))
`(let* ((,old-dir default-directory)
(,buf
(with-current-buffer (get-buffer-create ,bufname)
(prog1 (current-buffer)
(kill-all-local-variables)
;; FIXME: delete_all_overlays
(setq default-directory ,old-dir)
(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-setup-hook)))))
(standard-output ,buf))
(prog1 (progn ,@body)
(internal-temp-output-buffer-show ,buf)))))
(defmacro with-temp-file (file &rest body)
"Create a new buffer, evaluate BODY there, and write the buffer to FILE.
The value returned is the value of the last form in BODY.
See also `with-temp-buffer'."
(declare (indent 1) (debug t))
(let ((temp-file (make-symbol "temp-file"))
(temp-buffer (make-symbol "temp-buffer")))
`(let ((,temp-file ,file)
(,temp-buffer
(get-buffer-create (generate-new-buffer-name " *temp file*"))))
(unwind-protect
(prog1
(with-current-buffer ,temp-buffer
,@body)
(with-current-buffer ,temp-buffer
(write-region nil nil ,temp-file nil 0)))
(and (buffer-name ,temp-buffer)
(kill-buffer ,temp-buffer))))))
(defmacro with-temp-message (message &rest body)
"Display MESSAGE temporarily if non-nil while BODY is evaluated.
The original message is restored to the echo area after BODY has finished.
The value returned is the value of the last form in BODY.
MESSAGE is written to the message log buffer if `message-log-max' is non-nil.
If MESSAGE is nil, the echo area and message log buffer are unchanged.
Use a MESSAGE of \"\" to temporarily clear the echo area."
(declare (debug t) (indent 1))
(let ((current-message (make-symbol "current-message"))
(temp-message (make-symbol "with-temp-message")))
`(let ((,temp-message ,message)
(,current-message))
(unwind-protect
(progn
(when ,temp-message
(setq ,current-message (current-message))
(message "%s" ,temp-message))
,@body)
(and ,temp-message
(if ,current-message
(message "%s" ,current-message)
(message nil)))))))
(defmacro with-temp-buffer (&rest body)
"Create a temporary buffer, and evaluate BODY there like `progn'.
See also `with-temp-file' and `with-output-to-string'."
(declare (indent 0) (debug t))
(let ((temp-buffer (make-symbol "temp-buffer")))
`(let ((,temp-buffer (generate-new-buffer " *temp*")))
;; FIXME: kill-buffer can change current-buffer in some odd cases.
(with-current-buffer ,temp-buffer
(unwind-protect
(progn ,@body)
(and (buffer-name ,temp-buffer)
(kill-buffer ,temp-buffer)))))))
(defmacro with-silent-modifications (&rest body)
"Execute BODY, pretending it does not modify the buffer.
If BODY performs real modifications to the buffer's text, other
than cosmetic ones, undo data may become corrupted.
This macro will run BODY normally, but doesn't count its buffer
modifications as being buffer modifications. This affects things
like `buffer-modified-p', checking whether the file is locked by
someone else, running buffer modification hooks, and other things
of that nature.
Typically used around modifications of text-properties which do
not really affect the buffer's content."
(declare (debug t) (indent 0))
(let ((modified (make-symbol "modified")))
`(let* ((,modified (buffer-modified-p))
(buffer-undo-list t)
(inhibit-read-only t)
(inhibit-modification-hooks t))
(unwind-protect
(progn
,@body)
(unless ,modified
(restore-buffer-modified-p nil))))))
(defmacro with-output-to-string (&rest body)
"Execute BODY, return the text it sent to `standard-output', as a string."
(declare (indent 0) (debug t))
`(let ((standard-output
(get-buffer-create (generate-new-buffer-name " *string-output*"))))
(unwind-protect
(progn
(let ((standard-output standard-output))
,@body)
(with-current-buffer standard-output
(buffer-string)))
(kill-buffer standard-output))))
(defmacro with-local-quit (&rest body)
"Execute BODY, allowing quits to terminate BODY but not escape further.
When a quit terminates BODY, `with-local-quit' returns nil but
requests another quit. That quit will be processed as soon as quitting
is allowed once again. (Immediately, if `inhibit-quit' is nil.)"
(declare (debug t) (indent 0))
`(condition-case nil
(let ((inhibit-quit nil))
,@body)
(quit (setq quit-flag t)
;; This call is to give a chance to handle quit-flag
;; in case inhibit-quit is nil.
;; Without this, it will not be handled until the next function
;; call, and that might allow it to exit thru a condition-case
;; that intends to handle the quit signal next time.
(eval '(ignore nil)))))
(defmacro while-no-input (&rest body)
"Execute BODY only as long as there's no pending input.
If input arrives, that ends the execution of BODY,
and `while-no-input' returns t. Quitting makes it return nil.
If BODY finishes, `while-no-input' returns whatever value BODY produced."
(declare (debug t) (indent 0))
(let ((catch-sym (make-symbol "input")))
`(with-local-quit
(catch ',catch-sym
(let ((throw-on-input ',catch-sym))
(or (input-pending-p)
(progn ,@body)))))))
(defmacro condition-case-unless-debug (var bodyform &rest handlers)
"Like `condition-case' except that it does not prevent debugging.
More specifically if `debug-on-error' is set then the debugger will be invoked
even if this catches the signal."
(declare (debug condition-case) (indent 2))
`(condition-case ,var
,bodyform
,@(mapcar (lambda (handler)
`((debug ,@(if (listp (car handler)) (car handler)
(list (car handler))))
,@(cdr handler)))
handlers)))
(define-obsolete-function-alias 'condition-case-no-debug
'condition-case-unless-debug "24.1")
(defmacro with-demoted-errors (format &rest body)
"Run BODY and demote any errors to simple messages.
FORMAT is a string passed to `message' to format any error message.
It should contain a single %-sequence; e.g., \"Error: %S\".
If `debug-on-error' is non-nil, run BODY without catching its errors.
This is to be used around code which is not expected to signal an error
but which should be robust in the unexpected case that an error is signaled.
For backward compatibility, if FORMAT is not a constant string, it
is assumed to be part of BODY, in which case the message format
used is \"Error: %S\"."
(declare (debug t) (indent 1))
(let ((err (make-symbol "err"))
(format (if (and (stringp format) body) format
(prog1 "Error: %S"
(if format (push format body))))))
`(condition-case-unless-debug ,err
,(macroexp-progn body)
(error (message ,format ,err) nil))))
(defmacro combine-after-change-calls (&rest body)
"Execute BODY, but don't call the after-change functions till the end.
If BODY makes changes in the buffer, they are recorded
and the functions on `after-change-functions' are called several times
when BODY is finished.
The return value is the value of the last form in BODY.
If `before-change-functions' is non-nil, then calls to the after-change
functions can't be deferred, so in that case this macro has no effect.
Do not alter `after-change-functions' or `before-change-functions'
in BODY."
(declare (indent 0) (debug t))
`(unwind-protect
(let ((combine-after-change-calls t))
. ,body)
(combine-after-change-execute)))
(defmacro with-case-table (table &rest body)
"Execute the forms in BODY with TABLE as the current case table.
The value returned is the value of the last form in BODY."
(declare (indent 1) (debug t))
(let ((old-case-table (make-symbol "table"))
(old-buffer (make-symbol "buffer")))
`(let ((,old-case-table (current-case-table))
(,old-buffer (current-buffer)))
(unwind-protect
(progn (set-case-table ,table)
,@body)
(with-current-buffer ,old-buffer
(set-case-table ,old-case-table))))))
(defmacro with-file-modes (modes &rest body)
"Execute BODY with default file permissions temporarily set to MODES.
MODES is as for `set-default-file-modes'."
(declare (indent 1) (debug t))
(let ((umask (make-symbol "umask")))
`(let ((,umask (default-file-modes)))
(unwind-protect
(progn
(set-default-file-modes ,modes)
,@body)
(set-default-file-modes ,umask)))))
\f
;;; Matching and match data.
(defvar save-match-data-internal)
;; We use save-match-data-internal as the local variable because
;; that works ok in practice (people should not use that variable elsewhere).
;; We used to use an uninterned symbol; the compiler handles that properly
;; now, but it generates slower code.
(defmacro save-match-data (&rest body)
"Execute the BODY forms, restoring the global value of the match data.
The value returned is the value of the last form in BODY."
;; It is better not to use backquote here,
;; because that makes a bootstrapping problem
;; if you need to recompile all the Lisp files using interpreted code.
(declare (indent 0) (debug t))
(list 'let
'((save-match-data-internal (match-data)))
(list 'unwind-protect
(cons 'progn body)
;; It is safe to free (evaporate) markers immediately here,
;; as Lisp programs should not copy from save-match-data-internal.
'(set-match-data save-match-data-internal 'evaporate))))
(defun match-string (num &optional string)
"Return string of text matched by last search.
NUM specifies which parenthesized expression in the last regexp.
Value is nil if NUMth pair didn't match, or there were less than NUM pairs.
Zero means the entire text matched by the whole regexp or whole string.
STRING should be given if the last search was by `string-match' on STRING.
If STRING is nil, the current buffer should be the same buffer
the search/match was performed in."
(if (match-beginning num)
(if string
(substring string (match-beginning num) (match-end num))
(buffer-substring (match-beginning num) (match-end num)))))
(defun match-string-no-properties (num &optional string)
"Return string of text matched by last search, without text properties.
NUM specifies which parenthesized expression in the last regexp.
Value is nil if NUMth pair didn't match, or there were less than NUM pairs.
Zero means the entire text matched by the whole regexp or whole string.
STRING should be given if the last search was by `string-match' on STRING.
If STRING is nil, the current buffer should be the same buffer
the search/match was performed in."
(if (match-beginning num)
(if string
(substring-no-properties string (match-beginning num)
(match-end num))
(buffer-substring-no-properties (match-beginning num)
(match-end num)))))
(defun match-substitute-replacement (replacement
&optional fixedcase literal string subexp)
"Return REPLACEMENT as it will be inserted by `replace-match'.
In other words, all back-references in the form `\\&' and `\\N'
are substituted with actual strings matched by the last search.
Optional FIXEDCASE, LITERAL, STRING and SUBEXP have the same
meaning as for `replace-match'."
(let ((match (match-string 0 string)))
(save-match-data
(set-match-data (mapcar (lambda (x)
(if (numberp x)
(- x (match-beginning 0))
x))
(match-data t)))
(replace-match replacement fixedcase literal match subexp))))
(defun looking-back (regexp &optional limit greedy)
"Return non-nil if text before point matches regular expression REGEXP.
Like `looking-at' except matches before point, and is slower.
LIMIT if non-nil speeds up the search by specifying a minimum
starting position, to avoid checking matches that would start
before LIMIT.
If GREEDY is non-nil, extend the match backwards as far as
possible, stopping when a single additional previous character
cannot be part of a match for REGEXP. When the match is
extended, its starting position is allowed to occur before
LIMIT.
As a general recommendation, try to avoid using `looking-back'
wherever possible, since it is slow."
(declare
(advertised-calling-convention (regexp limit &optional greedy) "25.1"))
(let ((start (point))
(pos
(save-excursion
(and (re-search-backward (concat "\\(?:" regexp "\\)\\=") limit t)
(point)))))
(if (and greedy pos)
(save-restriction
(narrow-to-region (point-min) start)
(while (and (> pos (point-min))
(save-excursion
(goto-char pos)
(backward-char 1)
(looking-at (concat "\\(?:" regexp "\\)\\'"))))
(setq pos (1- pos)))
(save-excursion
(goto-char pos)
(looking-at (concat "\\(?:" regexp "\\)\\'")))))
(not (null pos))))
(defsubst looking-at-p (regexp)
"\
Same as `looking-at' except this function does not change the match data."
(let ((inhibit-changing-match-data t))
(looking-at regexp)))
(defsubst string-match-p (regexp string &optional start)
"\
Same as `string-match' except this function does not change the match data."
(let ((inhibit-changing-match-data t))
(string-match regexp string start)))
(defun subregexp-context-p (regexp pos &optional start)
"Return non-nil if POS is in a normal subregexp context in REGEXP.
A subregexp context is one where a sub-regexp can appear.
A non-subregexp context is for example within brackets, or within a
repetition bounds operator `\\=\\{...\\}', or right after a `\\'.
If START is non-nil, it should be a position in REGEXP, smaller
than POS, and known to be in a subregexp context."
;; Here's one possible implementation, with the great benefit that it
;; reuses the regexp-matcher's own parser, so it understands all the
;; details of the syntax. A disadvantage is that it needs to match the
;; error string.
(condition-case err
(progn
(string-match (substring regexp (or start 0) pos) "")
t)
(invalid-regexp
(not (member (cadr err) '("Unmatched [ or [^"
"Unmatched \\{"
"Trailing backslash")))))
;; An alternative implementation:
;; (defconst re-context-re
;; (let* ((harmless-ch "[^\\[]")
;; (harmless-esc "\\\\[^{]")
;; (class-harmless-ch "[^][]")
;; (class-lb-harmless "[^]:]")
;; (class-lb-colon-maybe-charclass ":\\([a-z]+:]\\)?")
;; (class-lb (concat "\\[\\(" class-lb-harmless
;; "\\|" class-lb-colon-maybe-charclass "\\)"))
;; (class
;; (concat "\\[^?]?"
;; "\\(" class-harmless-ch
;; "\\|" class-lb "\\)*"
;; "\\[?]")) ; special handling for bare [ at end of re
;; (braces "\\\\{[0-9,]+\\\\}"))
;; (concat "\\`\\(" harmless-ch "\\|" harmless-esc
;; "\\|" class "\\|" braces "\\)*\\'"))
;; "Matches any prefix that corresponds to a normal subregexp context.")
;; (string-match re-context-re (substring regexp (or start 0) pos))
)
\f
;;;; split-string
(defconst split-string-default-separators "[ \f\t\n\r\v]+"
"The default value of separators for `split-string'.
A regexp matching strings of whitespace. May be locale-dependent
\(as yet unimplemented). Should not match non-breaking spaces.
Warning: binding this to a different value and using it as default is
likely to have undesired semantics.")
;; The specification says that if both SEPARATORS and OMIT-NULLS are
;; defaulted, OMIT-NULLS should be treated as t. Simplifying the logical
;; expression leads to the equivalent implementation that if SEPARATORS
;; is defaulted, OMIT-NULLS is treated as t.
(defun split-string (string &optional separators omit-nulls trim)
"Split STRING into substrings bounded by matches for SEPARATORS.
The beginning and end of STRING, and each match for SEPARATORS, are
splitting points. The substrings matching SEPARATORS are removed, and
the substrings between the splitting points are collected as a list,
which is returned.
If SEPARATORS is non-nil, it should be a regular expression matching text
which separates, but is not part of, the substrings. If nil it defaults to
`split-string-default-separators', normally \"[ \\f\\t\\n\\r\\v]+\", and
OMIT-NULLS is forced to t.
If OMIT-NULLS is t, zero-length substrings are omitted from the list (so
that for the default value of SEPARATORS leading and trailing whitespace
are effectively trimmed). If nil, all zero-length substrings are retained,
which correctly parses CSV format, for example.
If TRIM is non-nil, it should be a regular expression to match
text to trim from the beginning and end of each substring. If trimming
makes the substring empty, it is treated as null.
If you want to trim whitespace from the substrings, the reliably correct
way is using TRIM. Making SEPARATORS match that whitespace gives incorrect
results when there is whitespace at the start or end of STRING. If you
see such calls to `split-string', please fix them.
Note that the effect of `(split-string STRING)' is the same as
`(split-string STRING split-string-default-separators t)'. In the rare
case that you wish to retain zero-length substrings when splitting on
whitespace, use `(split-string STRING split-string-default-separators)'.
Modifies the match data; use `save-match-data' if necessary."
(let* ((keep-nulls (not (if separators omit-nulls t)))
(rexp (or separators split-string-default-separators))
(start 0)
this-start this-end
notfirst
(list nil)
(push-one
;; Push the substring in range THIS-START to THIS-END
;; onto LIST, trimming it and perhaps discarding it.
(lambda ()
(when trim
;; Discard the trim from start of this substring.
(let ((tem (string-match trim string this-start)))
(and (eq tem this-start)
(setq this-start (match-end 0)))))
(when (or keep-nulls (< this-start this-end))
(let ((this (substring string this-start this-end)))
;; Discard the trim from end of this substring.
(when trim
(let ((tem (string-match (concat trim "\\'") this 0)))
(and tem (< tem (length this))
(setq this (substring this 0 tem)))))
;; Trimming could make it empty; check again.
(when (or keep-nulls (> (length this) 0))
(push this list)))))))
(while (and (string-match rexp string
(if (and notfirst
(= start (match-beginning 0))
(< start (length string)))
(1+ start) start))
(< start (length string)))
(setq notfirst t)
(setq this-start start this-end (match-beginning 0)
start (match-end 0))
(funcall push-one))
;; Handle the substring at the end of STRING.
(setq this-start start this-end (length string))
(funcall push-one)
(nreverse list)))
(defun combine-and-quote-strings (strings &optional separator)
"Concatenate the STRINGS, adding the SEPARATOR (default \" \").
This tries to quote the strings to avoid ambiguity such that
(split-string-and-unquote (combine-and-quote-strings strs)) == strs
Only some SEPARATORs will work properly."
(let* ((sep (or separator " "))
(re (concat "[\\\"]" "\\|" (regexp-quote sep))))
(mapconcat
(lambda (str)
(if (string-match re str)
(concat "\"" (replace-regexp-in-string "[\\\"]" "\\\\\\&" str) "\"")
str))
strings sep)))
(defun split-string-and-unquote (string &optional separator)
"Split the STRING into a list of strings.
It understands Emacs Lisp quoting within STRING, such that
(split-string-and-unquote (combine-and-quote-strings strs)) == strs
The SEPARATOR regexp defaults to \"\\s-+\"."
(let ((sep (or separator "\\s-+"))
(i (string-match "\"" string)))
(if (null i)
(split-string string sep t) ; no quoting: easy
(append (unless (eq i 0) (split-string (substring string 0 i) sep t))
(let ((rfs (read-from-string string i)))
(cons (car rfs)
(split-string-and-unquote (substring string (cdr rfs))
sep)))))))
\f
;;;; Replacement in strings.
(defun subst-char-in-string (fromchar tochar string &optional inplace)
"Replace FROMCHAR with TOCHAR in STRING each time it occurs.
Unless optional argument INPLACE is non-nil, return a new string."
(let ((i (length string))
(newstr (if inplace string (copy-sequence string))))
(while (> i 0)
(setq i (1- i))
(if (eq (aref newstr i) fromchar)
(aset newstr i tochar)))
newstr))
(defun replace-regexp-in-string (regexp rep string &optional
fixedcase literal subexp start)
"Replace all matches for REGEXP with REP in STRING.
Return a new string containing the replacements.
Optional arguments FIXEDCASE, LITERAL and SUBEXP are like the
arguments with the same names of function `replace-match'. If START
is non-nil, start replacements at that index in STRING.
REP is either a string used as the NEWTEXT arg of `replace-match' or a
function. If it is a function, it is called with the actual text of each
match, and its value is used as the replacement text. When REP is called,
the match data are the result of matching REGEXP against a substring
of STRING, the same substring that is the actual text of the match which
is passed to REP as its argument.
To replace only the first match (if any), make REGEXP match up to \\'
and replace a sub-expression, e.g.
(replace-regexp-in-string \"\\\\(foo\\\\).*\\\\'\" \"bar\" \" foo foo\" nil nil 1)
=> \" bar foo\""
;; To avoid excessive consing from multiple matches in long strings,
;; don't just call `replace-match' continually. Walk down the
;; string looking for matches of REGEXP and building up a (reversed)
;; list MATCHES. This comprises segments of STRING which weren't
;; matched interspersed with replacements for segments that were.
;; [For a `large' number of replacements it's more efficient to
;; operate in a temporary buffer; we can't tell from the function's
;; args whether to choose the buffer-based implementation, though it
;; might be reasonable to do so for long enough STRING.]
(let ((l (length string))
(start (or start 0))
matches str mb me)
(save-match-data
(while (and (< start l) (string-match regexp string start))
(setq mb (match-beginning 0)
me (match-end 0))
;; If we matched the empty string, make sure we advance by one char
(when (= me mb) (setq me (min l (1+ mb))))
;; Generate a replacement for the matched substring.
;; Operate only on the substring to minimize string consing.
;; Set up match data for the substring for replacement;
;; presumably this is likely to be faster than munging the
;; match data directly in Lisp.
(string-match regexp (setq str (substring string mb me)))
(setq matches
(cons (replace-match (if (stringp rep)
rep
(funcall rep (match-string 0 str)))
fixedcase literal str subexp)
(cons (substring string start mb) ; unmatched prefix
matches)))
(setq start me))
;; Reconstruct a string from the pieces.
(setq matches (cons (substring string start l) matches)) ; leftover
(apply #'concat (nreverse matches)))))
\f
(defun string-prefix-p (prefix string &optional ignore-case)
"Return non-nil if PREFIX is a prefix of STRING.
If IGNORE-CASE is non-nil, the comparison is done without paying attention
to case differences."
(let ((prefix-length (length prefix)))
(if (> prefix-length (length string)) nil
(eq t (compare-strings prefix 0 prefix-length string
0 prefix-length ignore-case)))))
(defun string-suffix-p (suffix string &optional ignore-case)
"Return non-nil if SUFFIX is a suffix of STRING.
If IGNORE-CASE is non-nil, the comparison is done without paying
attention to case differences."
(let ((start-pos (- (length string) (length suffix))))
(and (>= start-pos 0)
(eq t (compare-strings suffix nil nil
string start-pos nil ignore-case)))))
(defun bidi-string-mark-left-to-right (str)
"Return a string that can be safely inserted in left-to-right text.
Normally, inserting a string with right-to-left (RTL) script into
a buffer may cause some subsequent text to be displayed as part
of the RTL segment (usually this affects punctuation characters).
This function returns a string which displays as STR but forces
subsequent text to be displayed as left-to-right.
If STR contains any RTL character, this function returns a string
consisting of STR followed by an invisible left-to-right mark
\(LRM) character. Otherwise, it returns STR."
(unless (stringp str)
(signal 'wrong-type-argument (list 'stringp str)))
(if (string-match "\\cR" str)
(concat str (propertize (string ?\x200e) 'invisible t))
str))
\f
;;;; Specifying things to do later.
(defun load-history-regexp (file)
"Form a regexp to find FILE in `load-history'.
FILE, a string, is described in the function `eval-after-load'."
(if (file-name-absolute-p file)
(setq file (file-truename file)))
(concat (if (file-name-absolute-p file) "\\`" "\\(\\`\\|/\\)")
(regexp-quote file)
(if (file-name-extension file)
""
;; Note: regexp-opt can't be used here, since we need to call
;; this before Emacs has been fully started. 2006-05-21
(concat "\\(" (mapconcat 'regexp-quote load-suffixes "\\|") "\\)?"))
"\\(" (mapconcat 'regexp-quote jka-compr-load-suffixes "\\|")
"\\)?\\'"))
(defun load-history-filename-element (file-regexp)
"Get the first elt of `load-history' whose car matches FILE-REGEXP.
Return nil if there isn't one."
(let* ((loads load-history)
(load-elt (and loads (car loads))))
(save-match-data
(while (and loads
(or (null (car load-elt))
(not (string-match file-regexp (car load-elt)))))
(setq loads (cdr loads)
load-elt (and loads (car loads)))))
load-elt))
(put 'eval-after-load 'lisp-indent-function 1)
(defun eval-after-load (file form)
"Arrange that if FILE is loaded, FORM will be run immediately afterwards.
If FILE is already loaded, evaluate FORM right now.
FORM can be an Elisp expression (in which case it's passed to `eval'),
or a function (in which case it's passed to `funcall' with no argument).
If a matching file is loaded again, FORM will be evaluated again.
If FILE is a string, it may be either an absolute or a relative file
name, and may have an extension (e.g. \".el\") or may lack one, and
additionally may or may not have an extension denoting a compressed
format (e.g. \".gz\").
When FILE is absolute, this first converts it to a true name by chasing
symbolic links. Only a file of this name (see next paragraph regarding
extensions) will trigger the evaluation of FORM. When FILE is relative,
a file whose absolute true name ends in FILE will trigger evaluation.
When FILE lacks an extension, a file name with any extension will trigger
evaluation. Otherwise, its extension must match FILE's. A further
extension for a compressed format (e.g. \".gz\") on FILE will not affect
this name matching.
Alternatively, FILE can be a feature (i.e. a symbol), in which case FORM
is evaluated at the end of any file that `provide's this feature.
If the feature is provided when evaluating code not associated with a
file, FORM is evaluated immediately after the provide statement.
Usually FILE is just a library name like \"font-lock\" or a feature name
like 'font-lock.
This function makes or adds to an entry on `after-load-alist'."
(declare (compiler-macro
(lambda (whole)
(if (eq 'quote (car-safe form))
;; Quote with lambda so the compiler can look inside.
`(eval-after-load ,file (lambda () ,(nth 1 form)))
whole))))
;; Add this FORM into after-load-alist (regardless of whether we'll be
;; evaluating it now).
(let* ((regexp-or-feature
(if (stringp file)
(setq file (purecopy (load-history-regexp file)))
file))
(elt (assoc regexp-or-feature after-load-alist))
(func
(if (functionp form) form
;; Try to use the "current" lexical/dynamic mode for `form'.
(eval `(lambda () ,form) lexical-binding))))
(unless elt
(setq elt (list regexp-or-feature))
(push elt after-load-alist))
;; Is there an already loaded file whose name (or `provide' name)
;; matches FILE?
(prog1 (if (if (stringp file)
(load-history-filename-element regexp-or-feature)
(featurep file))
(funcall func))
(let ((delayed-func
(if (not (symbolp regexp-or-feature)) func
;; For features, the after-load-alist elements get run when
;; `provide' is called rather than at the end of the file.
;; So add an indirection to make sure that `func' is really run
;; "after-load" in case the provide call happens early.
(lambda ()
(if (not load-file-name)
;; Not being provided from a file, run func right now.
(funcall func)
(let ((lfn load-file-name)
;; Don't use letrec, because equal (in
;; add/remove-hook) would get trapped in a cycle.
(fun (make-symbol "eval-after-load-helper")))
(fset fun (lambda (file)
(when (equal file lfn)
(remove-hook 'after-load-functions fun)
(funcall func))))
(add-hook 'after-load-functions fun 'append)))))))
;; Add FORM to the element unless it's already there.
(unless (member delayed-func (cdr elt))
(nconc elt (list delayed-func)))))))
(defmacro with-eval-after-load (file &rest body)
"Execute BODY after FILE is loaded.
FILE is normally a feature name, but it can also be a file name,
in case that file does not provide any feature."
(declare (indent 1) (debug t))
`(eval-after-load ,file (lambda () ,@body)))
(defvar after-load-functions nil
"Special hook run after loading a file.
Each function there is called with a single argument, the absolute
name of the file just loaded.")
(defun do-after-load-evaluation (abs-file)
"Evaluate all `eval-after-load' forms, if any, for ABS-FILE.
ABS-FILE, a string, should be the absolute true name of a file just loaded.
This function is called directly from the C code."
;; Run the relevant eval-after-load forms.
(dolist (a-l-element after-load-alist)
(when (and (stringp (car a-l-element))
(string-match-p (car a-l-element) abs-file))
;; discard the file name regexp
(mapc #'funcall (cdr a-l-element))))
;; Complain when the user uses obsolete files.
(when (string-match-p "/obsolete/\\([^/]*\\)\\'" abs-file)
;; Maybe we should just use display-warning? This seems yucky...
(let* ((file (file-name-nondirectory abs-file))
(msg (format "Package %s is obsolete!"
(substring file 0
(string-match "\\.elc?\\>" file)))))
;; Cribbed from cl--compiling-file.
(if (and (boundp 'byte-compile--outbuffer)
(bufferp (symbol-value 'byte-compile--outbuffer))
(equal (buffer-name (symbol-value 'byte-compile--outbuffer))
" *Compiler Output*"))
;; Don't warn about obsolete files using other obsolete files.
(unless (and (stringp byte-compile-current-file)
(string-match-p "/obsolete/[^/]*\\'"
(expand-file-name
byte-compile-current-file
byte-compile-root-dir)))
(byte-compile-log-warning msg))
(run-with-timer 0 nil
(lambda (msg)
(message "%s" msg))
msg))))
;; Finally, run any other hook.
(run-hook-with-args 'after-load-functions abs-file))
(defun eval-next-after-load (file)
"Read the following input sexp, and run it whenever FILE is loaded.
This makes or adds to an entry on `after-load-alist'.
FILE should be the name of a library, with no directory name."
(declare (obsolete eval-after-load "23.2"))
(eval-after-load file (read)))
\f
(defun display-delayed-warnings ()
"Display delayed warnings from `delayed-warnings-list'.
Used from `delayed-warnings-hook' (which see)."
(dolist (warning (nreverse delayed-warnings-list))
(apply 'display-warning warning))
(setq delayed-warnings-list nil))
(defun collapse-delayed-warnings ()
"Remove duplicates from `delayed-warnings-list'.
Collapse identical adjacent warnings into one (plus count).
Used from `delayed-warnings-hook' (which see)."
(let ((count 1)
collapsed warning)
(while delayed-warnings-list
(setq warning (pop delayed-warnings-list))
(if (equal warning (car delayed-warnings-list))
(setq count (1+ count))
(when (> count 1)
(setcdr warning (cons (format "%s [%d times]" (cadr warning) count)
(cddr warning)))
(setq count 1))
(push warning collapsed)))
(setq delayed-warnings-list (nreverse collapsed))))
;; At present this is only used for Emacs internals.
;; Ref http://lists.gnu.org/archive/html/emacs-devel/2012-02/msg00085.html
(defvar delayed-warnings-hook '(collapse-delayed-warnings
display-delayed-warnings)
"Normal hook run to process and display delayed warnings.
By default, this hook contains functions to consolidate the
warnings listed in `delayed-warnings-list', display them, and set
`delayed-warnings-list' back to nil.")
(defun delay-warning (type message &optional level buffer-name)
"Display a delayed warning.
Aside from going through `delayed-warnings-list', this is equivalent
to `display-warning'."
(push (list type message level buffer-name) delayed-warnings-list))
\f
;;;; invisibility specs
(defun add-to-invisibility-spec (element)
"Add ELEMENT to `buffer-invisibility-spec'.
See documentation for `buffer-invisibility-spec' for the kind of elements
that can be added."
(if (eq buffer-invisibility-spec t)
(setq buffer-invisibility-spec (list t)))
(setq buffer-invisibility-spec
(cons element buffer-invisibility-spec)))
(defun remove-from-invisibility-spec (element)
"Remove ELEMENT from `buffer-invisibility-spec'."
(if (consp buffer-invisibility-spec)
(setq buffer-invisibility-spec
(delete element buffer-invisibility-spec))))
\f
;;;; Syntax tables.
(defmacro with-syntax-table (table &rest body)
"Evaluate BODY with syntax table of current buffer set to TABLE.
The syntax table of the current buffer is saved, BODY is evaluated, and the
saved table is restored, even in case of an abnormal exit.
Value is what BODY returns."
(declare (debug t) (indent 1))
(let ((old-table (make-symbol "table"))
(old-buffer (make-symbol "buffer")))
`(let ((,old-table (syntax-table))
(,old-buffer (current-buffer)))
(unwind-protect
(progn
(set-syntax-table ,table)
,@body)
(save-current-buffer
(set-buffer ,old-buffer)
(set-syntax-table ,old-table))))))
(defun make-syntax-table (&optional oldtable)
"Return a new syntax table.
Create a syntax table which inherits from OLDTABLE (if non-nil) or
from `standard-syntax-table' otherwise."
(let ((table (make-char-table 'syntax-table nil)))
(set-char-table-parent table (or oldtable (standard-syntax-table)))
table))
(defun syntax-after (pos)
"Return the raw syntax descriptor for the char after POS.
If POS is outside the buffer's accessible portion, return nil."
(unless (or (< pos (point-min)) (>= pos (point-max)))
(let ((st (if parse-sexp-lookup-properties
(get-char-property pos 'syntax-table))))
(if (consp st) st
(aref (or st (syntax-table)) (char-after pos))))))
(defun syntax-class (syntax)
"Return the code for the syntax class described by SYNTAX.
SYNTAX should be a raw syntax descriptor; the return value is a
integer which encodes the corresponding syntax class. See Info
node `(elisp)Syntax Table Internals' for a list of codes.
If SYNTAX is nil, return nil."
(and syntax (logand (car syntax) 65535)))
\f
;; Utility motion commands
;; Whitespace
(defun forward-whitespace (arg)
"Move point to the end of the next sequence of whitespace chars.
Each such sequence may be a single newline, or a sequence of
consecutive space and/or tab characters.
With prefix argument ARG, do it ARG times if positive, or move
backwards ARG times if negative."
(interactive "^p")
(if (natnump arg)
(re-search-forward "[ \t]+\\|\n" nil 'move arg)
(while (< arg 0)
(if (re-search-backward "[ \t]+\\|\n" nil 'move)
(or (eq (char-after (match-beginning 0)) ?\n)
(skip-chars-backward " \t")))
(setq arg (1+ arg)))))
;; Symbols
(defun forward-symbol (arg)
"Move point to the next position that is the end of a symbol.
A symbol is any sequence of characters that are in either the
word constituent or symbol constituent syntax class.
With prefix argument ARG, do it ARG times if positive, or move
backwards ARG times if negative."
(interactive "^p")
(if (natnump arg)
(re-search-forward "\\(\\sw\\|\\s_\\)+" nil 'move arg)
(while (< arg 0)
(if (re-search-backward "\\(\\sw\\|\\s_\\)+" nil 'move)
(skip-syntax-backward "w_"))
(setq arg (1+ arg)))))
;; Syntax blocks
(defun forward-same-syntax (&optional arg)
"Move point past all characters with the same syntax class.
With prefix argument ARG, do it ARG times if positive, or move
backwards ARG times if negative."
(interactive "^p")
(or arg (setq arg 1))
(while (< arg 0)
(skip-syntax-backward
(char-to-string (char-syntax (char-before))))
(setq arg (1+ arg)))
(while (> arg 0)
(skip-syntax-forward (char-to-string (char-syntax (char-after))))
(setq arg (1- arg))))
\f
;;;; Text clones
(defvar text-clone--maintaining nil)
(defun text-clone--maintain (ol1 after beg end &optional _len)
"Propagate the changes made under the overlay OL1 to the other clones.
This is used on the `modification-hooks' property of text clones."
(when (and after (not undo-in-progress)
(not text-clone--maintaining)
(overlay-start ol1))
(let ((margin (if (overlay-get ol1 'text-clone-spreadp) 1 0)))
(setq beg (max beg (+ (overlay-start ol1) margin)))
(setq end (min end (- (overlay-end ol1) margin)))
(when (<= beg end)
(save-excursion
(when (overlay-get ol1 'text-clone-syntax)
;; Check content of the clone's text.
(let ((cbeg (+ (overlay-start ol1) margin))
(cend (- (overlay-end ol1) margin)))
(goto-char cbeg)
(save-match-data
(if (not (re-search-forward
(overlay-get ol1 'text-clone-syntax) cend t))
;; Mark the overlay for deletion.
(setq end cbeg)
(when (< (match-end 0) cend)
;; Shrink the clone at its end.
(setq end (min end (match-end 0)))
(move-overlay ol1 (overlay-start ol1)
(+ (match-end 0) margin)))
(when (> (match-beginning 0) cbeg)
;; Shrink the clone at its beginning.
(setq beg (max (match-beginning 0) beg))
(move-overlay ol1 (- (match-beginning 0) margin)
(overlay-end ol1)))))))
;; Now go ahead and update the clones.
(let ((head (- beg (overlay-start ol1)))
(tail (- (overlay-end ol1) end))
(str (buffer-substring beg end))
(nothing-left t)
(text-clone--maintaining t))
(dolist (ol2 (overlay-get ol1 'text-clones))
(let ((oe (overlay-end ol2)))
(unless (or (eq ol1 ol2) (null oe))
(setq nothing-left nil)
(let ((mod-beg (+ (overlay-start ol2) head)))
;;(overlay-put ol2 'modification-hooks nil)
(goto-char (- (overlay-end ol2) tail))
(unless (> mod-beg (point))
(save-excursion (insert str))
(delete-region mod-beg (point)))
;;(overlay-put ol2 'modification-hooks '(text-clone--maintain))
))))
(if nothing-left (delete-overlay ol1))))))))
(defun text-clone-create (start end &optional spreadp syntax)
"Create a text clone of START...END at point.
Text clones are chunks of text that are automatically kept identical:
changes done to one of the clones will be immediately propagated to the other.
The buffer's content at point is assumed to be already identical to
the one between START and END.
If SYNTAX is provided it's a regexp that describes the possible text of
the clones; the clone will be shrunk or killed if necessary to ensure that
its text matches the regexp.
If SPREADP is non-nil it indicates that text inserted before/after the
clone should be incorporated in the clone."
;; To deal with SPREADP we can either use an overlay with `nil t' along
;; with insert-(behind|in-front-of)-hooks or use a slightly larger overlay
;; (with a one-char margin at each end) with `t nil'.
;; We opted for a larger overlay because it behaves better in the case
;; where the clone is reduced to the empty string (we want the overlay to
;; stay when the clone's content is the empty string and we want to use
;; `evaporate' to make sure those overlays get deleted when needed).
;;
(let* ((pt-end (+ (point) (- end start)))
(start-margin (if (or (not spreadp) (bobp) (<= start (point-min)))
0 1))
(end-margin (if (or (not spreadp)
(>= pt-end (point-max))
(>= start (point-max)))
0 1))
;; FIXME: Reuse overlays at point to extend dups!
(ol1 (make-overlay (- start start-margin) (+ end end-margin) nil t))
(ol2 (make-overlay (- (point) start-margin) (+ pt-end end-margin) nil t))
(dups (list ol1 ol2)))
(overlay-put ol1 'modification-hooks '(text-clone--maintain))
(when spreadp (overlay-put ol1 'text-clone-spreadp t))
(when syntax (overlay-put ol1 'text-clone-syntax syntax))
;;(overlay-put ol1 'face 'underline)
(overlay-put ol1 'evaporate t)
(overlay-put ol1 'text-clones dups)
;;
(overlay-put ol2 'modification-hooks '(text-clone--maintain))
(when spreadp (overlay-put ol2 'text-clone-spreadp t))
(when syntax (overlay-put ol2 'text-clone-syntax syntax))
;;(overlay-put ol2 'face 'underline)
(overlay-put ol2 'evaporate t)
(overlay-put ol2 'text-clones dups)))
\f
;;;; Mail user agents.
;; Here we include just enough for other packages to be able
;; to define them.
(defun define-mail-user-agent (symbol composefunc sendfunc
&optional abortfunc hookvar)
"Define a symbol to identify a mail-sending package for `mail-user-agent'.
SYMBOL can be any Lisp symbol. Its function definition and/or
value as a variable do not matter for this usage; we use only certain
properties on its property list, to encode the rest of the arguments.
COMPOSEFUNC is program callable function that composes an outgoing
mail message buffer. This function should set up the basics of the
buffer without requiring user interaction. It should populate the
standard mail headers, leaving the `to:' and `subject:' headers blank
by default.
COMPOSEFUNC should accept several optional arguments--the same
arguments that `compose-mail' takes. See that function's documentation.
SENDFUNC is the command a user would run to send the message.
Optional ABORTFUNC is the command a user would run to abort the
message. For mail packages that don't have a separate abort function,
this can be `kill-buffer' (the equivalent of omitting this argument).
Optional HOOKVAR is a hook variable that gets run before the message
is actually sent. Callers that use the `mail-user-agent' may
install a hook function temporarily on this hook variable.
If HOOKVAR is nil, `mail-send-hook' is used.
The properties used on SYMBOL are `composefunc', `sendfunc',
`abortfunc', and `hookvar'."
(put symbol 'composefunc composefunc)
(put symbol 'sendfunc sendfunc)
(put symbol 'abortfunc (or abortfunc 'kill-buffer))
(put symbol 'hookvar (or hookvar 'mail-send-hook)))
\f
(defvar called-interactively-p-functions nil
"Special hook called to skip special frames in `called-interactively-p'.
The functions are called with 3 arguments: (I FRAME1 FRAME2),
where FRAME1 is a \"current frame\", FRAME2 is the next frame,
I is the index of the frame after FRAME2. It should return nil
if those frames don't seem special and otherwise, it should return
the number of frames to skip (minus 1).")
(defconst internal--funcall-interactively
(symbol-function 'funcall-interactively))
(defun called-interactively-p (&optional kind)
"Return t if the containing function was called by `call-interactively'.
If KIND is `interactive', then only return t if the call was made
interactively by the user, i.e. not in `noninteractive' mode nor
when `executing-kbd-macro'.
If KIND is `any', on the other hand, it will return t for any kind of
interactive call, including being called as the binding of a key or
from a keyboard macro, even in `noninteractive' mode.
This function is very brittle, it may fail to return the intended result when
the code is debugged, advised, or instrumented in some form. Some macros and
special forms (such as `condition-case') may also sometimes wrap their bodies
in a `lambda', so any call to `called-interactively-p' from those bodies will
indicate whether that lambda (rather than the surrounding function) was called
interactively.
Instead of using this function, it is cleaner and more reliable to give your
function an extra optional argument whose `interactive' spec specifies
non-nil unconditionally (\"p\" is a good way to do this), or via
\(not (or executing-kbd-macro noninteractive)).
The only known proper use of `interactive' for KIND is in deciding
whether to display a helpful message, or how to display it. If you're
thinking of using it for any other purpose, it is quite likely that
you're making a mistake. Think: what do you want to do when the
command is called from a keyboard macro?"
(declare (advertised-calling-convention (kind) "23.1"))
(when (not (and (eq kind 'interactive)
(or executing-kbd-macro noninteractive)))
(let* ((i 1) ;; 0 is the called-interactively-p frame.
frame nextframe
(get-next-frame
(lambda ()
(setq frame nextframe)
(setq nextframe (backtrace-frame i 'called-interactively-p))
;; (message "Frame %d = %S" i nextframe)
(setq i (1+ i)))))
(funcall get-next-frame) ;; Get the first frame.
(while
;; FIXME: The edebug and advice handling should be made modular and
;; provided directly by edebug.el and nadvice.el.
(progn
;; frame =(backtrace-frame i-2)
;; nextframe=(backtrace-frame i-1)
(funcall get-next-frame)
;; `pcase' would be a fairly good fit here, but it sometimes moves
;; branches within local functions, which then messes up the
;; `backtrace-frame' data we get,
(or
;; Skip special forms (from non-compiled code).
(and frame (null (car frame)))
;; Skip also `interactive-p' (because we don't want to know if
;; interactive-p was called interactively but if it's caller was)
;; and `byte-code' (idem; this appears in subexpressions of things
;; like condition-case, which are wrapped in a separate bytecode
;; chunk).
;; FIXME: For lexical-binding code, this is much worse,
;; because the frames look like "byte-code -> funcall -> #[...]",
;; which is not a reliable signature.
(memq (nth 1 frame) '(interactive-p 'byte-code))
;; Skip package-specific stack-frames.
(let ((skip (run-hook-with-args-until-success
'called-interactively-p-functions
i frame nextframe)))
(pcase skip
(`nil nil)
(`0 t)
(_ (setq i (+ i skip -1)) (funcall get-next-frame)))))))
;; Now `frame' should be "the function from which we were called".
(pcase (cons frame nextframe)
;; No subr calls `interactive-p', so we can rule that out.
(`((,_ ,(pred (lambda (f) (subrp (indirect-function f)))) . ,_) . ,_) nil)
;; In case #<subr funcall-interactively> without going through the
;; `funcall-interactively' symbol (bug#3984).
(`(,_ . (t ,(pred (lambda (f)
(eq internal--funcall-interactively
(indirect-function f))))
. ,_))
t)))))
(defun interactive-p ()
"Return t if the containing function was run directly by user input.
This means that the function was called with `call-interactively'
\(which includes being called as the binding of a key)
and input is currently coming from the keyboard (not a keyboard macro),
and Emacs is not running in batch mode (`noninteractive' is nil).
The only known proper use of `interactive-p' is in deciding whether to
display a helpful message, or how to display it. If you're thinking
of using it for any other purpose, it is quite likely that you're
making a mistake. Think: what do you want to do when the command is
called from a keyboard macro or in batch mode?
To test whether your function was called with `call-interactively',
either (i) add an extra optional argument and give it an `interactive'
spec that specifies non-nil unconditionally (such as \"p\"); or (ii)
use `called-interactively-p'."
(declare (obsolete called-interactively-p "23.2"))
(called-interactively-p 'interactive))
(defun internal-push-keymap (keymap symbol)
(let ((map (symbol-value symbol)))
(unless (memq keymap map)
(unless (memq 'add-keymap-witness (symbol-value symbol))
(setq map (make-composed-keymap nil (symbol-value symbol)))
(push 'add-keymap-witness (cdr map))
(set symbol map))
(push keymap (cdr map)))))
(defun internal-pop-keymap (keymap symbol)
(let ((map (symbol-value symbol)))
(when (memq keymap map)
(setf (cdr map) (delq keymap (cdr map))))
(let ((tail (cddr map)))
(and (or (null tail) (keymapp tail))
(eq 'add-keymap-witness (nth 1 map))
(set symbol tail)))))
(define-obsolete-function-alias
'set-temporary-overlay-map 'set-transient-map "24.4")
(defun set-transient-map (map &optional keep-pred on-exit)
"Set MAP as a temporary keymap taking precedence over other keymaps.
Normally, MAP is used only once, to look up the very next key.
However, if the optional argument KEEP-PRED is t, MAP stays
active if a key from MAP is used. KEEP-PRED can also be a
function of no arguments: it is called from `pre-command-hook' and
if it returns non-nil, then MAP stays active.
Optional arg ON-EXIT, if non-nil, specifies a function that is
called, with no arguments, after MAP is deactivated.
This uses `overriding-terminal-local-map' which takes precedence over all other
keymaps. As usual, if no match for a key is found in MAP, the normal key
lookup sequence then continues.
This returns an \"exit function\", which can be called with no argument
to deactivate this transient map, regardless of KEEP-PRED."
(let* ((clearfun (make-symbol "clear-transient-map"))
(exitfun
(lambda ()
(internal-pop-keymap map 'overriding-terminal-local-map)
(remove-hook 'pre-command-hook clearfun)
(when on-exit (funcall on-exit)))))
;; Don't use letrec, because equal (in add/remove-hook) would get trapped
;; in a cycle.
(fset clearfun
(lambda ()
(with-demoted-errors "set-transient-map PCH: %S"
(unless (cond
((null keep-pred) nil)
((not (eq map (cadr overriding-terminal-local-map)))
;; There's presumably some other transient-map in
;; effect. Wait for that one to terminate before we
;; remove ourselves.
;; For example, if isearch and C-u both use transient
;; maps, then the lifetime of the C-u should be nested
;; within isearch's, so the pre-command-hook of
;; isearch should be suspended during the C-u one so
;; we don't exit isearch just because we hit 1 after
;; C-u and that 1 exits isearch whereas it doesn't
;; exit C-u.
t)
((eq t keep-pred)
(eq this-command
(lookup-key map (this-command-keys-vector))))
(t (funcall keep-pred)))
(funcall exitfun)))))
(add-hook 'pre-command-hook clearfun)
(internal-push-keymap map 'overriding-terminal-local-map)
exitfun))
;;;; Progress reporters.
;; Progress reporter has the following structure:
;;
;; (NEXT-UPDATE-VALUE . [NEXT-UPDATE-TIME
;; MIN-VALUE
;; MAX-VALUE
;; MESSAGE
;; MIN-CHANGE
;; MIN-TIME])
;;
;; This weirdness is for optimization reasons: we want
;; `progress-reporter-update' to be as fast as possible, so
;; `(car reporter)' is better than `(aref reporter 0)'.
;;
;; NEXT-UPDATE-TIME is a float. While `float-time' loses a couple
;; digits of precision, it doesn't really matter here. On the other
;; hand, it greatly simplifies the code.
(defsubst progress-reporter-update (reporter &optional value)
"Report progress of an operation in the echo area.
REPORTER should be the result of a call to `make-progress-reporter'.
If REPORTER is a numerical progress reporter---i.e. if it was
made using non-nil MIN-VALUE and MAX-VALUE arguments to
`make-progress-reporter'---then VALUE should be a number between
MIN-VALUE and MAX-VALUE.
If REPORTER is a non-numerical reporter, VALUE should be nil.
This function is relatively inexpensive. If the change since
last update is too small or insufficient time has passed, it does
nothing."
(when (or (not (numberp value)) ; For pulsing reporter
(>= value (car reporter))) ; For numerical reporter
(progress-reporter-do-update reporter value)))
(defun make-progress-reporter (message &optional min-value max-value
current-value min-change min-time)
"Return progress reporter object for use with `progress-reporter-update'.
MESSAGE is shown in the echo area, with a status indicator
appended to the end. When you call `progress-reporter-done', the
word \"done\" is printed after the MESSAGE. You can change the
MESSAGE of an existing progress reporter by calling
`progress-reporter-force-update'.
MIN-VALUE and MAX-VALUE, if non-nil, are starting (0% complete)
and final (100% complete) states of operation; the latter should
be larger. In this case, the status message shows the percentage
progress.
If MIN-VALUE and/or MAX-VALUE is omitted or nil, the status
message shows a \"spinning\", non-numeric indicator.
Optional CURRENT-VALUE is the initial progress; the default is
MIN-VALUE.
Optional MIN-CHANGE is the minimal change in percents to report;
the default is 1%.
CURRENT-VALUE and MIN-CHANGE do not have any effect if MIN-VALUE
and/or MAX-VALUE are nil.
Optional MIN-TIME specifies the minimum interval time between
echo area updates (default is 0.2 seconds.) If the function
`float-time' is not present, time is not tracked at all. If the
OS is not capable of measuring fractions of seconds, this
parameter is effectively rounded up."
(when (string-match "[[:alnum:]]\\'" message)
(setq message (concat message "...")))
(unless min-time
(setq min-time 0.2))
(let ((reporter
;; Force a call to `message' now
(cons (or min-value 0)
(vector (if (and (fboundp 'float-time)
(>= min-time 0.02))
(float-time) nil)
min-value
max-value
message
(if min-change (max (min min-change 50) 1) 1)
min-time))))
(progress-reporter-update reporter (or current-value min-value))
reporter))
(defun progress-reporter-force-update (reporter &optional value new-message)
"Report progress of an operation in the echo area unconditionally.
The first two arguments are the same as in `progress-reporter-update'.
NEW-MESSAGE, if non-nil, sets a new message for the reporter."
(let ((parameters (cdr reporter)))
(when new-message
(aset parameters 3 new-message))
(when (aref parameters 0)
(aset parameters 0 (float-time)))
(progress-reporter-do-update reporter value)))
(defvar progress-reporter--pulse-characters ["-" "\\" "|" "/"]
"Characters to use for pulsing progress reporters.")
(defun progress-reporter-do-update (reporter value)
(let* ((parameters (cdr reporter))
(update-time (aref parameters 0))
(min-value (aref parameters 1))
(max-value (aref parameters 2))
(text (aref parameters 3))
(enough-time-passed
;; See if enough time has passed since the last update.
(or (not update-time)
(when (>= (float-time) update-time)
;; Calculate time for the next update
(aset parameters 0 (+ update-time (aref parameters 5)))))))
(cond ((and min-value max-value)
;; Numerical indicator
(let* ((one-percent (/ (- max-value min-value) 100.0))
(percentage (if (= max-value min-value)
0
(truncate (/ (- value min-value)
one-percent)))))
;; Calculate NEXT-UPDATE-VALUE. If we are not printing
;; message because not enough time has passed, use 1
;; instead of MIN-CHANGE. This makes delays between echo
;; area updates closer to MIN-TIME.
(setcar reporter
(min (+ min-value (* (+ percentage
(if enough-time-passed
;; MIN-CHANGE
(aref parameters 4)
1))
one-percent))
max-value))
(when (integerp value)
(setcar reporter (ceiling (car reporter))))
;; Only print message if enough time has passed
(when enough-time-passed
(if (> percentage 0)
(message "%s%d%%" text percentage)
(message "%s" text)))))
;; Pulsing indicator
(enough-time-passed
(let ((index (mod (1+ (car reporter)) 4))
(message-log-max nil))
(setcar reporter index)
(message "%s %s"
text
(aref progress-reporter--pulse-characters
index)))))))
(defun progress-reporter-done (reporter)
"Print reporter's message followed by word \"done\" in echo area."
(message "%sdone" (aref (cdr reporter) 3)))
(defmacro dotimes-with-progress-reporter (spec message &rest body)
"Loop a certain number of times and report progress in the echo area.
Evaluate BODY with VAR bound to successive integers running from
0, inclusive, to COUNT, exclusive. Then evaluate RESULT to get
the return value (nil if RESULT is omitted).
At each iteration MESSAGE followed by progress percentage is
printed in the echo area. After the loop is finished, MESSAGE
followed by word \"done\" is printed. This macro is a
convenience wrapper around `make-progress-reporter' and friends.
\(fn (VAR COUNT [RESULT]) MESSAGE BODY...)"
(declare (indent 2) (debug ((symbolp form &optional form) form body)))
(let ((temp (make-symbol "--dotimes-temp--"))
(temp2 (make-symbol "--dotimes-temp2--"))
(start 0)
(end (nth 1 spec)))
`(let ((,temp ,end)
(,(car spec) ,start)
(,temp2 (make-progress-reporter ,message ,start ,end)))
(while (< ,(car spec) ,temp)
,@body
(progress-reporter-update ,temp2
(setq ,(car spec) (1+ ,(car spec)))))
(progress-reporter-done ,temp2)
nil ,@(cdr (cdr spec)))))
\f
;;;; Comparing version strings.
(defconst version-separator "."
"Specify the string used to separate the version elements.
Usually the separator is \".\", but it can be any other string.")
(defconst version-regexp-alist
'(("^[-_+ ]?snapshot$" . -4)
;; treat "1.2.3-20050920" and "1.2-3" as snapshot releases
("^[-_+]$" . -4)
;; treat "1.2.3-CVS" as snapshot release
("^[-_+ ]?\\(cvs\\|git\\|bzr\\|svn\\|hg\\|darcs\\)$" . -4)
("^[-_+ ]?alpha$" . -3)
("^[-_+ ]?beta$" . -2)
("^[-_+ ]?\\(pre\\|rc\\)$" . -1))
"Specify association between non-numeric version and its priority.
This association is used to handle version string like \"1.0pre2\",
\"0.9alpha1\", etc. It's used by `version-to-list' (which see) to convert the
non-numeric part of a version string to an integer. For example:
String Version Integer List Version
\"0.9snapshot\" (0 9 -4)
\"1.0-git\" (1 0 -4)
\"1.0pre2\" (1 0 -1 2)
\"1.0PRE2\" (1 0 -1 2)
\"22.8beta3\" (22 8 -2 3)
\"22.8 Beta3\" (22 8 -2 3)
\"0.9alpha1\" (0 9 -3 1)
\"0.9AlphA1\" (0 9 -3 1)
\"0.9 alpha\" (0 9 -3)
Each element has the following form:
(REGEXP . PRIORITY)
Where:
REGEXP regexp used to match non-numeric part of a version string.
It should begin with the `^' anchor and end with a `$' to
prevent false hits. Letter-case is ignored while matching
REGEXP.
PRIORITY a negative integer specifying non-numeric priority of REGEXP.")
(defun version-to-list (ver)
"Convert version string VER into a list of integers.
The version syntax is given by the following EBNF:
VERSION ::= NUMBER ( SEPARATOR NUMBER )*.
NUMBER ::= (0|1|2|3|4|5|6|7|8|9)+.
SEPARATOR ::= `version-separator' (which see)
| `version-regexp-alist' (which see).
The NUMBER part is optional if SEPARATOR is a match for an element
in `version-regexp-alist'.
Examples of valid version syntax:
1.0pre2 1.0.7.5 22.8beta3 0.9alpha1 6.9.30Beta
Examples of invalid version syntax:
1.0prepre2 1.0..7.5 22.8X3 alpha3.2 .5
Examples of version conversion:
Version String Version as a List of Integers
\"1.0.7.5\" (1 0 7 5)
\"1.0pre2\" (1 0 -1 2)
\"1.0PRE2\" (1 0 -1 2)
\"22.8beta3\" (22 8 -2 3)
\"22.8Beta3\" (22 8 -2 3)
\"0.9alpha1\" (0 9 -3 1)
\"0.9AlphA1\" (0 9 -3 1)
\"0.9alpha\" (0 9 -3)
\"0.9snapshot\" (0 9 -4)
\"1.0-git\" (1 0 -4)
See documentation for `version-separator' and `version-regexp-alist'."
(or (and (stringp ver) (> (length ver) 0))
(error "Invalid version string: '%s'" ver))
;; Change .x.y to 0.x.y
(if (and (>= (length ver) (length version-separator))
(string-equal (substring ver 0 (length version-separator))
version-separator))
(setq ver (concat "0" ver)))
(save-match-data
(let ((i 0)
(case-fold-search t) ; ignore case in matching
lst s al)
(while (and (setq s (string-match "[0-9]+" ver i))
(= s i))
;; handle numeric part
(setq lst (cons (string-to-number (substring ver i (match-end 0)))
lst)
i (match-end 0))
;; handle non-numeric part
(when (and (setq s (string-match "[^0-9]+" ver i))
(= s i))
(setq s (substring ver i (match-end 0))
i (match-end 0))
;; handle alpha, beta, pre, etc. separator
(unless (string= s version-separator)
(setq al version-regexp-alist)
(while (and al (not (string-match (caar al) s)))
(setq al (cdr al)))
(cond (al
(push (cdar al) lst))
;; Convert 22.3a to 22.3.1, 22.3b to 22.3.2, etc.
((string-match "^[-_+ ]?\\([a-zA-Z]\\)$" s)
(push (- (aref (downcase (match-string 1 s)) 0) ?a -1)
lst))
(t (error "Invalid version syntax: '%s'" ver))))))
(if (null lst)
(error "Invalid version syntax: '%s'" ver)
(nreverse lst)))))
(defun version-list-< (l1 l2)
"Return t if L1, a list specification of a version, is lower than L2.
Note that a version specified by the list (1) is equal to (1 0),
\(1 0 0), (1 0 0 0), etc. That is, the trailing zeros are insignificant.
Also, a version given by the list (1) is higher than (1 -1), which in
turn is higher than (1 -2), which is higher than (1 -3)."
(while (and l1 l2 (= (car l1) (car l2)))
(setq l1 (cdr l1)
l2 (cdr l2)))
(cond
;; l1 not null and l2 not null
((and l1 l2) (< (car l1) (car l2)))
;; l1 null and l2 null ==> l1 length = l2 length
((and (null l1) (null l2)) nil)
;; l1 not null and l2 null ==> l1 length > l2 length
(l1 (< (version-list-not-zero l1) 0))
;; l1 null and l2 not null ==> l2 length > l1 length
(t (< 0 (version-list-not-zero l2)))))
(defun version-list-= (l1 l2)
"Return t if L1, a list specification of a version, is equal to L2.
Note that a version specified by the list (1) is equal to (1 0),
\(1 0 0), (1 0 0 0), etc. That is, the trailing zeros are insignificant.
Also, a version given by the list (1) is higher than (1 -1), which in
turn is higher than (1 -2), which is higher than (1 -3)."
(while (and l1 l2 (= (car l1) (car l2)))
(setq l1 (cdr l1)
l2 (cdr l2)))
(cond
;; l1 not null and l2 not null
((and l1 l2) nil)
;; l1 null and l2 null ==> l1 length = l2 length
((and (null l1) (null l2)))
;; l1 not null and l2 null ==> l1 length > l2 length
(l1 (zerop (version-list-not-zero l1)))
;; l1 null and l2 not null ==> l2 length > l1 length
(t (zerop (version-list-not-zero l2)))))
(defun version-list-<= (l1 l2)
"Return t if L1, a list specification of a version, is lower or equal to L2.
Note that integer list (1) is equal to (1 0), (1 0 0), (1 0 0 0),
etc. That is, the trailing zeroes are insignificant. Also, integer
list (1) is greater than (1 -1) which is greater than (1 -2)
which is greater than (1 -3)."
(while (and l1 l2 (= (car l1) (car l2)))
(setq l1 (cdr l1)
l2 (cdr l2)))
(cond
;; l1 not null and l2 not null
((and l1 l2) (< (car l1) (car l2)))
;; l1 null and l2 null ==> l1 length = l2 length
((and (null l1) (null l2)))
;; l1 not null and l2 null ==> l1 length > l2 length
(l1 (<= (version-list-not-zero l1) 0))
;; l1 null and l2 not null ==> l2 length > l1 length
(t (<= 0 (version-list-not-zero l2)))))
(defun version-list-not-zero (lst)
"Return the first non-zero element of LST, which is a list of integers.
If all LST elements are zeros or LST is nil, return zero."
(while (and lst (zerop (car lst)))
(setq lst (cdr lst)))
(if lst
(car lst)
;; there is no element different of zero
0))
(defun version< (v1 v2)
"Return t if version V1 is lower (older) than V2.
Note that version string \"1\" is equal to \"1.0\", \"1.0.0\", \"1.0.0.0\",
etc. That is, the trailing \".0\"s are insignificant. Also, version
string \"1\" is higher (newer) than \"1pre\", which is higher than \"1beta\",
which is higher than \"1alpha\", which is higher than \"1snapshot\".
Also, \"-GIT\", \"-CVS\" and \"-NNN\" are treated as snapshot versions."
(version-list-< (version-to-list v1) (version-to-list v2)))
(defun version<= (v1 v2)
"Return t if version V1 is lower (older) than or equal to V2.
Note that version string \"1\" is equal to \"1.0\", \"1.0.0\", \"1.0.0.0\",
etc. That is, the trailing \".0\"s are insignificant. Also, version
string \"1\" is higher (newer) than \"1pre\", which is higher than \"1beta\",
which is higher than \"1alpha\", which is higher than \"1snapshot\".
Also, \"-GIT\", \"-CVS\" and \"-NNN\" are treated as snapshot versions."
(version-list-<= (version-to-list v1) (version-to-list v2)))
(defun version= (v1 v2)
"Return t if version V1 is equal to V2.
Note that version string \"1\" is equal to \"1.0\", \"1.0.0\", \"1.0.0.0\",
etc. That is, the trailing \".0\"s are insignificant. Also, version
string \"1\" is higher (newer) than \"1pre\", which is higher than \"1beta\",
which is higher than \"1alpha\", which is higher than \"1snapshot\".
Also, \"-GIT\", \"-CVS\" and \"-NNN\" are treated as snapshot versions."
(version-list-= (version-to-list v1) (version-to-list v2)))
(defvar package--builtin-versions
;; Mostly populated by loaddefs.el via autoload-builtin-package-versions.
(purecopy `((emacs . ,(version-to-list emacs-version))))
"Alist giving the version of each versioned builtin package.
I.e. each element of the list is of the form (NAME . VERSION) where
NAME is the package name as a symbol, and VERSION is its version
as a list.")
(defun package--description-file (dir)
(concat (let ((subdir (file-name-nondirectory
(directory-file-name dir))))
(if (string-match "\\([^.].*?\\)-\\([0-9]+\\(?:[.][0-9]+\\|\\(?:pre\\|beta\\|alpha\\)[0-9]+\\)*\\)" subdir)
(match-string 1 subdir) subdir))
"-pkg.el"))
\f
;;; Misc.
(defconst menu-bar-separator '("--")
"Separator for menus.")
;; The following statement ought to be in print.c, but `provide' can't
;; be used there.
;; http://lists.gnu.org/archive/html/emacs-devel/2009-08/msg00236.html
(when (hash-table-p (car (read-from-string
(prin1-to-string (make-hash-table)))))
(provide 'hashtable-print-readable))
;; This is used in lisp/Makefile.in and in leim/Makefile.in to
;; generate file names for autoloads, custom-deps, and finder-data.
(defun unmsys--file-name (file)
"Produce the canonical file name for FILE from its MSYS form.
On systems other than MS-Windows, just returns FILE.
On MS-Windows, converts /d/foo/bar form of file names
passed by MSYS Make into d:/foo/bar that Emacs can grok.
This function is called from lisp/Makefile and leim/Makefile."
(when (and (eq system-type 'windows-nt)
(string-match "\\`/[a-zA-Z]/" file))
(setq file (concat (substring file 1 2) ":" (substring file 2))))
file)
;;; subr.el ends here
|