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
| | ;;; isearch.el --- incremental search minor mode
;; Copyright (C) 1992-1997, 1999-2015 Free Software Foundation, Inc.
;; Author: Daniel LaLiberte <liberte@cs.uiuc.edu>
;; Maintainer: emacs-devel@gnu.org
;; Keywords: matching
;; 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:
;; Instructions
;; For programmed use of isearch-mode, e.g. calling (isearch-forward),
;; isearch-mode behaves modally and does not return until the search
;; is completed. It uses a recursive-edit to behave this way.
;; The key bindings active within isearch-mode are defined below in
;; `isearch-mode-map'. Also see minibuffer-local-isearch-map
;; for bindings active during `isearch-edit-string'.
;; isearch-mode should work even if you switch windows with the mouse,
;; in which case isearch-mode is terminated automatically before the
;; switch.
;; The search ring and completion commands automatically put you in
;; the minibuffer to edit the string. This gives you a chance to
;; modify the search string before executing the search. There are
;; three commands to terminate the editing: C-s and C-r exit the
;; minibuffer and search forward and reverse respectively, while C-m
;; exits and searches in the last search direction.
;; Exiting immediately from isearch uses isearch-edit-string instead
;; of nonincremental-search, if search-nonincremental-instead is non-nil.
;; The name of this option should probably be changed if we decide to
;; keep the behavior. No point in forcing nonincremental search until
;; the last possible moment.
;;; Code:
(eval-when-compile (require 'cl-lib))
\f
;; Some additional options and constants.
(defgroup isearch nil
"Incremental search minor mode."
:link '(emacs-commentary-link "isearch")
:link '(custom-manual "(emacs)Incremental Search")
:prefix "isearch-"
:prefix "search-"
:group 'matching)
(defcustom search-exit-option t
"Non-nil means random control characters terminate incremental search."
:type 'boolean)
(defcustom search-slow-window-lines 1
"Number of lines in slow search display windows.
These are the short windows used during incremental search on slow terminals.
Negative means put the slow search window at the top (normally it's at bottom)
and the value is minus the number of lines."
:type 'integer)
(defcustom search-slow-speed 1200
"Highest terminal speed at which to use \"slow\" style incremental search.
This is the style where a one-line window is created to show the line
that the search has reached."
:type 'integer)
(defcustom search-upper-case 'not-yanks
"If non-nil, upper case chars disable case fold searching.
That is, upper and lower case chars must match exactly.
This applies no matter where the chars come from, but does not
apply to chars in regexps that are prefixed with `\\'.
If this value is `not-yanks', text yanked into the search string
in Isearch mode is always downcased."
:type '(choice (const :tag "off" nil)
(const not-yanks)
(other :tag "on" t)))
(defcustom search-nonincremental-instead t
"If non-nil, do a nonincremental search instead of exiting immediately.
Actually, `isearch-edit-string' is called to let you enter the search
string, and RET terminates editing and does a nonincremental search."
:type 'boolean)
(defcustom search-whitespace-regexp (purecopy "\\s-+")
"If non-nil, regular expression to match a sequence of whitespace chars.
When you enter a space or spaces in the incremental search, it
will match any sequence matched by this regexp. As an exception,
spaces are treated normally in regexp incremental search if they
occur in a regexp construct like [...] or *, + or ?.
If the value is a string, it applies to both ordinary and
regexp incremental search. If the value is nil, or
`isearch-lax-whitespace' is nil for ordinary incremental search, or
`isearch-regexp-lax-whitespace' is nil for regexp incremental search,
then each space you type matches literally, against one space.
You might want to use something like \"[ \\t\\r\\n]+\" instead.
In the Customization buffer, that is `[' followed by a space,
a tab, a carriage return (control-M), a newline, and `]+'."
:type '(choice (const :tag "Match Spaces Literally" nil)
regexp)
:version "24.3")
(defcustom search-invisible 'open
"If t incremental search/query-replace can match hidden text.
A nil value means don't match invisible text.
When the value is `open', if the text matched is made invisible by
an overlay having an `invisible' property and that overlay has a property
`isearch-open-invisible', then incremental search will show the contents.
\(This applies when using `outline.el' and `hideshow.el'.)
To temporarily change the value for an active incremental search,
use \\<isearch-mode-map>\\[isearch-toggle-invisible].
See also the related option `isearch-hide-immediately'.
See also `reveal-mode' if you want overlays to automatically be opened
whenever point is in one of them."
:type '(choice (const :tag "Match hidden text" t)
(const :tag "Open overlays" open)
(const :tag "Don't match hidden text" nil)))
(defcustom isearch-hide-immediately t
"If non-nil, re-hide an invisible match right away.
This variable makes a difference when `search-invisible' is set to `open'.
If nil then do not re-hide opened invisible text when the match moves.
Whatever the value, all opened invisible text is hidden again after exiting
the search."
:type 'boolean)
(defcustom isearch-resume-in-command-history nil
"If non-nil, `isearch-resume' commands are added to the command history.
This allows you to resume earlier Isearch sessions through the
command history."
:type 'boolean)
(defvar isearch-mode-hook nil
"Function(s) to call after starting up an incremental search.")
(defvar isearch-update-post-hook nil
"Function(s) to call after isearch has found matches in the buffer.")
(defvar isearch-mode-end-hook nil
"Function(s) to call after terminating an incremental search.
When these functions are called, `isearch-mode-end-hook-quit'
is non-nil if the user quits the search.")
(defvar isearch-mode-end-hook-quit nil
"Non-nil while running `isearch-mode-end-hook' if the user quits the search.")
(defvar isearch-message-function nil
"Function to call to display the search prompt.
If nil, use function `isearch-message'.")
(defvar isearch-wrap-function nil
"Function to call to wrap the search when search is failed.
If nil, move point to the beginning of the buffer for a forward search,
or to the end of the buffer for a backward search.")
(defvar isearch-push-state-function nil
"Function to save a function restoring the mode-specific Isearch state
to the search status stack.")
(defvar isearch-filter-predicate #'isearch-filter-visible
"Predicate that filters the search hits that would normally be available.
Search hits that dissatisfy the predicate are skipped. The function
has two arguments: the positions of start and end of text matched by
the search. If this function returns nil, continue searching without
stopping at this match.
If you use `add-function' to modify this variable, you can use the
`isearch-message-prefix' advice property to specify the prefix string
displayed in the search message.")
;; Search ring.
(defvar search-ring nil
"List of search string sequences.")
(defvar regexp-search-ring nil
"List of regular expression search string sequences.")
(defcustom search-ring-max 16
"Maximum length of search ring before oldest elements are thrown away."
:type 'integer)
(defcustom regexp-search-ring-max 16
"Maximum length of regexp search ring before oldest elements are thrown away."
:type 'integer)
(defvar search-ring-yank-pointer nil
"Index in `search-ring' of last string reused.
It is nil if none yet.")
(defvar regexp-search-ring-yank-pointer nil
"Index in `regexp-search-ring' of last string reused.
It is nil if none yet.")
(defcustom search-ring-update nil
"Non-nil if advancing or retreating in the search ring should cause search.
Default value, nil, means edit the string instead."
:type 'boolean)
(autoload 'character-fold-to-regexp "character-fold")
(defcustom search-default-regexp-mode nil
"Default mode to use when starting isearch.
Value is nil, t, or a function.
If nil, default to literal searches (note that `case-fold-search'
and `isearch-lax-whitespace' may still be applied).\\<isearch-mode-map>
If t, default to regexp searches (as if typing `\\[isearch-toggle-regexp]' during
isearch).
If a function, use that function as an `isearch-regexp-function'.
Example functions are `word-search-regexp' \(`\\[isearch-toggle-word]'),
`isearch-symbol-regexp' \(`\\[isearch-toggle-symbol]'), and
`character-fold-to-regexp' \(`\\[isearch-toggle-character-fold]')."
;; :type is set below by `isearch-define-mode-toggle'.
:type '(choice (const :tag "Literal search" nil)
(const :tag "Regexp search" t)
(function :tag "Other"))
:version "25.1")
;;; isearch highlight customization.
(defcustom search-highlight t
"Non-nil means incremental search highlights the current match."
:type 'boolean)
(defface isearch
'((((class color) (min-colors 88) (background light))
;; The background must not be too dark, for that means
;; the character is hard to see when the cursor is there.
(:background "magenta3" :foreground "lightskyblue1"))
(((class color) (min-colors 88) (background dark))
(:background "palevioletred2" :foreground "brown4"))
(((class color) (min-colors 16))
(:background "magenta4" :foreground "cyan1"))
(((class color) (min-colors 8))
(:background "magenta4" :foreground "cyan1"))
(t (:inverse-video t)))
"Face for highlighting Isearch matches."
:group 'isearch
:group 'basic-faces)
(defvar isearch-face 'isearch)
(defface isearch-fail
'((((class color) (min-colors 88) (background light))
(:background "RosyBrown1"))
(((class color) (min-colors 88) (background dark))
(:background "red4"))
(((class color) (min-colors 16))
(:background "red"))
(((class color) (min-colors 8))
(:background "red"))
(((class color grayscale))
:foreground "grey")
(t (:inverse-video t)))
"Face for highlighting failed part in Isearch echo-area message."
:version "23.1")
(defcustom isearch-lazy-highlight t
"Controls the lazy-highlighting during incremental search.
When non-nil, all text in the buffer matching the current search
string is highlighted lazily (see `lazy-highlight-initial-delay'
and `lazy-highlight-interval')."
:type 'boolean
:group 'lazy-highlight
:group 'isearch)
;;; Lazy highlight customization.
(defgroup lazy-highlight nil
"Lazy highlighting feature for matching strings."
:prefix "lazy-highlight-"
:version "21.1"
:group 'isearch
:group 'matching)
(define-obsolete-variable-alias 'isearch-lazy-highlight-cleanup
'lazy-highlight-cleanup
"22.1")
(defcustom lazy-highlight-cleanup t
"Controls whether to remove extra highlighting after a search.
If this is nil, extra highlighting can be \"manually\" removed with
\\[lazy-highlight-cleanup]."
:type 'boolean
:group 'lazy-highlight)
(define-obsolete-variable-alias 'isearch-lazy-highlight-initial-delay
'lazy-highlight-initial-delay
"22.1")
(defcustom lazy-highlight-initial-delay 0.25
"Seconds to wait before beginning to lazily highlight all matches."
:type 'number
:group 'lazy-highlight)
(define-obsolete-variable-alias 'isearch-lazy-highlight-interval
'lazy-highlight-interval
"22.1")
(defcustom lazy-highlight-interval 0 ; 0.0625
"Seconds between lazily highlighting successive matches."
:type 'number
:group 'lazy-highlight)
(define-obsolete-variable-alias 'isearch-lazy-highlight-max-at-a-time
'lazy-highlight-max-at-a-time
"22.1")
(defcustom lazy-highlight-max-at-a-time 20
"Maximum matches to highlight at a time (for `lazy-highlight').
Larger values may reduce Isearch's responsiveness to user input;
smaller values make matches highlight slowly.
A value of nil means highlight all matches."
:type '(choice (const :tag "All" nil)
(integer :tag "Some"))
:group 'lazy-highlight)
(defface lazy-highlight
'((((class color) (min-colors 88) (background light))
(:background "paleturquoise"))
(((class color) (min-colors 88) (background dark))
(:background "paleturquoise4"))
(((class color) (min-colors 16))
(:background "turquoise3"))
(((class color) (min-colors 8))
(:background "turquoise3"))
(t (:underline t)))
"Face for lazy highlighting of matches other than the current one."
:group 'lazy-highlight
:group 'basic-faces)
(define-obsolete-face-alias 'isearch-lazy-highlight-face 'lazy-highlight "22.1")
(define-obsolete-variable-alias 'isearch-lazy-highlight-face
'lazy-highlight-face
"22.1")
(defvar lazy-highlight-face 'lazy-highlight)
\f
;; Define isearch help map.
(defvar isearch-help-map
(let ((map (make-sparse-keymap)))
(define-key map (char-to-string help-char) 'isearch-help-for-help)
(define-key map [help] 'isearch-help-for-help)
(define-key map [f1] 'isearch-help-for-help)
(define-key map "?" 'isearch-help-for-help)
(define-key map "b" 'isearch-describe-bindings)
(define-key map "k" 'isearch-describe-key)
(define-key map "m" 'isearch-describe-mode)
(define-key map "q" 'help-quit)
map)
"Keymap for characters following the Help key for Isearch mode.")
(eval-when-compile (require 'help-macro))
(make-help-screen isearch-help-for-help-internal
(purecopy "Type a help option: [bkm] or ?")
"You have typed %THIS-KEY%, the help character. Type a Help option:
\(Type \\<help-map>\\[help-quit] to exit the Help command.)
b Display all Isearch key bindings.
k KEYS Display full documentation of Isearch key sequence.
m Display documentation of Isearch mode.
You can't type here other help keys available in the global help map,
but outside of this help window when you type them in Isearch mode,
they exit Isearch mode before displaying global help."
isearch-help-map)
(defvar isearch--display-help-action '(nil (inhibit-same-window . t)))
(defun isearch-help-for-help ()
"Display Isearch help menu."
(interactive)
(let ((display-buffer-overriding-action isearch--display-help-action))
(isearch-help-for-help-internal))
(isearch-update))
(defun isearch-describe-bindings ()
"Show a list of all keys defined in Isearch mode, and their definitions.
This is like `describe-bindings', but displays only Isearch keys."
(interactive)
(let ((display-buffer-overriding-action isearch--display-help-action))
(with-help-window "*Help*"
(with-current-buffer standard-output
(princ "Isearch Mode Bindings:\n")
(princ (substitute-command-keys "\\{isearch-mode-map}"))))))
(defun isearch-describe-key ()
"Display documentation of the function invoked by isearch key."
(interactive)
(let ((display-buffer-overriding-action isearch--display-help-action))
(call-interactively 'describe-key))
(isearch-update))
(defun isearch-describe-mode ()
"Display documentation of Isearch mode."
(interactive)
(let ((display-buffer-overriding-action isearch--display-help-action))
(describe-function 'isearch-forward))
(isearch-update))
(defalias 'isearch-mode-help 'isearch-describe-mode)
\f
;; Define isearch-mode keymap.
(defvar isearch-mode-map
(let ((i 0)
(map (make-keymap)))
(or (char-table-p (nth 1 map))
(error "The initialization of isearch-mode-map must be updated"))
;; Make all multibyte characters search for themselves.
(set-char-table-range (nth 1 map) (cons #x100 (max-char))
'isearch-printing-char)
;; Single-byte printing chars extend the search string by default.
(setq i ?\s)
(while (< i 256)
(define-key map (vector i) 'isearch-printing-char)
(setq i (1+ i)))
;; To handle local bindings with meta char prefix keys, define
;; another full keymap. This must be done for any other prefix
;; keys as well, one full keymap per char of the prefix key. It
;; would be simpler to disable the global keymap, and/or have a
;; default local key binding for any key not otherwise bound.
(let ((meta-map (make-sparse-keymap)))
(define-key map (char-to-string meta-prefix-char) meta-map))
;; Several non-printing chars change the searching behavior.
(define-key map "\C-s" 'isearch-repeat-forward)
(define-key map "\C-r" 'isearch-repeat-backward)
;; Define M-C-s and M-C-r like C-s and C-r so that the same key
;; combinations can be used to repeat regexp isearches that can
;; be used to start these searches.
(define-key map "\M-\C-s" 'isearch-repeat-forward)
(define-key map "\M-\C-r" 'isearch-repeat-backward)
(define-key map "\177" 'isearch-delete-char)
(define-key map [backspace] 'undefined) ;bug#20466.
(define-key map "\C-g" 'isearch-abort)
;; This assumes \e is the meta-prefix-char.
(or (= ?\e meta-prefix-char)
(error "Inconsistency in isearch.el"))
(define-key map "\e\e\e" 'isearch-cancel)
(define-key map "\C-q" 'isearch-quote-char)
(define-key map "\r" 'isearch-exit)
(define-key map [return] 'isearch-exit)
(define-key map "\C-j" 'isearch-printing-char)
(define-key map "\t" 'isearch-printing-char)
(define-key map [?\S-\ ] 'isearch-printing-char)
(define-key map "\C-w" 'isearch-yank-word-or-char)
(define-key map "\M-\C-w" 'isearch-del-char)
(define-key map "\M-\C-y" 'isearch-yank-char)
(define-key map "\C-y" 'isearch-yank-kill)
(define-key map "\M-s\C-e" 'isearch-yank-line)
(define-key map (char-to-string help-char) isearch-help-map)
(define-key map [help] isearch-help-map)
(define-key map [f1] isearch-help-map)
(define-key map "\M-n" 'isearch-ring-advance)
(define-key map "\M-p" 'isearch-ring-retreat)
(define-key map "\M-y" 'isearch-yank-pop)
(define-key map "\M-\t" 'isearch-complete)
;; Pass frame events transparently so they won't exit the search.
;; In particular, if we have more than one display open, then a
;; switch-frame might be generated by someone typing at another keyboard.
(define-key map [switch-frame] nil)
(define-key map [delete-frame] nil)
(define-key map [iconify-frame] nil)
(define-key map [make-frame-visible] nil)
(define-key map [mouse-movement] nil)
(define-key map [language-change] nil)
;; For searching multilingual text.
(define-key map "\C-\\" 'isearch-toggle-input-method)
(define-key map "\C-^" 'isearch-toggle-specified-input-method)
;; People expect to be able to paste with the mouse.
(define-key map [mouse-2] #'isearch-mouse-2)
(define-key map [down-mouse-2] nil)
;; Some bindings you may want to put in your isearch-mode-hook.
;; Suggest some alternates...
(define-key map "\M-c" 'isearch-toggle-case-fold)
(define-key map "\M-r" 'isearch-toggle-regexp)
(define-key map "\M-e" 'isearch-edit-string)
(put 'isearch-toggle-case-fold :advertised-binding "\M-sc")
(put 'isearch-toggle-regexp :advertised-binding "\M-sr")
(put 'isearch-edit-string :advertised-binding "\M-se")
(define-key map "\M-se" 'isearch-edit-string)
;; More toggles defined by `isearch-define-mode-toggle'.
(define-key map [?\M-%] 'isearch-query-replace)
(define-key map [?\C-\M-%] 'isearch-query-replace-regexp)
(define-key map "\M-so" 'isearch-occur)
(define-key map "\M-shr" 'isearch-highlight-regexp)
;; The key translations defined in the C-x 8 prefix should add
;; characters to the search string. See iso-transl.el.
(define-key map "\C-x8\r" 'isearch-char-by-name)
map)
"Keymap for `isearch-mode'.")
(defvar minibuffer-local-isearch-map
(let ((map (make-sparse-keymap)))
(set-keymap-parent map minibuffer-local-map)
(define-key map "\r" 'exit-minibuffer)
(define-key map "\M-\t" 'isearch-complete-edit)
(define-key map "\C-s" 'isearch-forward-exit-minibuffer)
(define-key map "\C-r" 'isearch-reverse-exit-minibuffer)
(define-key map "\C-f" 'isearch-yank-char-in-minibuffer)
(define-key map [right] 'isearch-yank-char-in-minibuffer)
map)
"Keymap for editing Isearch strings in the minibuffer.")
;; Internal variables declared globally for byte-compiler.
;; These are all set with setq while isearching
;; and bound locally while editing the search string.
(defvar isearch-forward nil) ; Searching in the forward direction.
(defvar isearch-regexp nil) ; Searching for a regexp.
(defvar isearch-regexp-function nil
"Regexp-based search mode for words/symbols.
If the value is a function (e.g. `isearch-symbol-regexp'), it is
called to convert a plain search string to a regexp used by
regexp search functions.
The symbol property `isearch-message-prefix' put on this function
specifies the prefix string displayed in the search message.")
;; We still support setting this to t for backwards compatibility.
(define-obsolete-variable-alias 'isearch-word
'isearch-regexp-function "25.1")
(defvar isearch-lax-whitespace t
"If non-nil, a space will match a sequence of whitespace chars.
When you enter a space or spaces in ordinary incremental search, it
will match any sequence matched by the regexp defined by the variable
`search-whitespace-regexp'. If the value is nil, each space you type
matches literally, against one space. You can toggle the value of this
variable by the command `isearch-toggle-lax-whitespace'.")
(defvar isearch-regexp-lax-whitespace nil
"If non-nil, a space will match a sequence of whitespace chars.
When you enter a space or spaces in regexp incremental search, it
will match any sequence matched by the regexp defined by the variable
`search-whitespace-regexp'. If the value is nil, each space you type
matches literally, against one space. You can toggle the value of this
variable by the command `isearch-toggle-lax-whitespace'.")
(defvar isearch-cmds nil
"Stack of search status elements.
Each element is an `isearch--state' struct where the slots are
[STRING MESSAGE POINT SUCCESS FORWARD OTHER-END WORD
ERROR WRAPPED BARRIER CASE-FOLD-SEARCH]")
(defvar isearch-string "") ; The current search string.
(defvar isearch-message "") ; text-char-description version of isearch-string
(defvar isearch-message-prefix-add nil) ; Additional text for the message prefix
(defvar isearch-message-suffix-add nil) ; Additional text for the message suffix
(defvar isearch-success t) ; Searching is currently successful.
(defvar isearch-error nil) ; Error message for failed search.
(defvar isearch-other-end nil) ; Start (end) of match if forward (backward).
(defvar isearch-wrapped nil) ; Searching restarted from the top (bottom).
(defvar isearch-barrier 0
"Recorded minimum/maximal point for the current search.")
(defvar isearch-just-started nil)
(defvar isearch-start-hscroll 0) ; hscroll when starting the search.
;; case-fold-search while searching.
;; either nil, t, or 'yes. 'yes means the same as t except that mixed
;; case in the search string is ignored.
(defvar isearch-case-fold-search nil)
;; search-invisible while searching.
;; either nil, t, or 'open. 'open means the same as t except that
;; opens hidden overlays.
(defvar isearch-invisible search-invisible)
(defvar isearch-last-case-fold-search nil)
;; Used to save default value while isearch is active
(defvar isearch-original-minibuffer-message-timeout nil)
(defvar isearch-adjusted nil)
(defvar isearch-slow-terminal-mode nil)
;; If t, using a small window.
(defvar isearch-small-window nil)
(defvar isearch-opoint 0)
;; The window configuration active at the beginning of the search.
(defvar isearch-window-configuration nil)
;; Flag to indicate a yank occurred, so don't move the cursor.
(defvar isearch-yank-flag nil)
;; A function to be called after each input character is processed.
;; (It is not called after characters that exit the search.)
;; It is only set from an optional argument to `isearch-mode'.
(defvar isearch-op-fun nil)
;; Is isearch-mode in a recursive edit for modal searching.
(defvar isearch-recursive-edit nil)
;; Should isearch be terminated after doing one search?
(defvar isearch-nonincremental nil)
;; New value of isearch-forward after isearch-edit-string.
(defvar isearch-new-forward nil)
;; Accumulate here the overlays opened during searching.
(defvar isearch-opened-overlays nil)
;; Non-nil if the string exists but is invisible.
(defvar isearch-hidden nil)
;; The value of input-method-function when isearch is invoked.
(defvar isearch-input-method-function nil)
;; A flag to tell if input-method-function is locally bound when
;; isearch is invoked.
(defvar isearch-input-method-local-p nil)
(defvar isearch--saved-overriding-local-map nil)
;; Minor-mode-alist changes - kind of redundant with the
;; echo area, but if isearching in multiple windows, it can be useful.
(or (assq 'isearch-mode minor-mode-alist)
(nconc minor-mode-alist
(list '(isearch-mode isearch-mode))))
(defvar-local isearch-mode nil) ;; Name of the minor mode, if non-nil.
(define-key global-map "\C-s" 'isearch-forward)
(define-key esc-map "\C-s" 'isearch-forward-regexp)
(define-key global-map "\C-r" 'isearch-backward)
(define-key esc-map "\C-r" 'isearch-backward-regexp)
(define-key search-map "w" 'isearch-forward-word)
(define-key search-map "_" 'isearch-forward-symbol)
(define-key search-map "." 'isearch-forward-symbol-at-point)
;; Entry points to isearch-mode.
(defun isearch-forward (&optional regexp-p no-recursive-edit)
"\
Do incremental search forward.
With a prefix argument, do an incremental regular expression search instead.
\\<isearch-mode-map>
As you type characters, they add to the search string and are found.
The following non-printing keys are bound in `isearch-mode-map'.
Type \\[isearch-delete-char] to cancel last input item from end of search string.
Type \\[isearch-exit] to exit, leaving point at location found.
Type LFD (C-j) to match end of line.
Type \\[isearch-repeat-forward] to search again forward,\
\\[isearch-repeat-backward] to search again backward.
Type \\[isearch-yank-word-or-char] to yank next word or character in buffer
onto the end of the search string, and search for it.
Type \\[isearch-del-char] to delete character from end of search string.
Type \\[isearch-yank-char] to yank char from buffer onto end of search\
string and search for it.
Type \\[isearch-yank-line] to yank rest of line onto end of search string\
and search for it.
Type \\[isearch-yank-kill] to yank the last string of killed text.
Type \\[isearch-yank-pop] to replace string just yanked into search prompt
with string killed before it.
Type \\[isearch-quote-char] to quote control character to search for it.
Type \\[isearch-char-by-name] to add a character to search by Unicode name,\
with completion.
\\[isearch-abort] while searching or when search has failed cancels input\
back to what has
been found successfully.
\\[isearch-abort] when search is successful aborts and moves point to\
starting point.
If you try to exit with the search string still empty, it invokes
nonincremental search.
Type \\[isearch-toggle-case-fold] to toggle search case-sensitivity.
Type \\[isearch-toggle-invisible] to toggle search in invisible text.
Type \\[isearch-toggle-regexp] to toggle regular-expression mode.
Type \\[isearch-toggle-word] to toggle word mode.
Type \\[isearch-toggle-symbol] to toggle symbol mode.
Type \\[isearch-toggle-character-fold] to toggle character folding.
Type \\[isearch-toggle-lax-whitespace] to toggle whitespace matching.
In incremental searches, a space or spaces normally matches any whitespace
defined by the variable `search-whitespace-regexp'; see also the variables
`isearch-lax-whitespace' and `isearch-regexp-lax-whitespace'.
Type \\[isearch-edit-string] to edit the search string in the minibuffer.
Also supported is a search ring of the previous 16 search strings.
Type \\[isearch-ring-advance] to search for the next item in the search ring.
Type \\[isearch-ring-retreat] to search for the previous item in the search\
ring.
Type \\[isearch-complete] to complete the search string using the search ring.
Type \\[isearch-query-replace] to run `query-replace' with string to\
replace from last search string.
Type \\[isearch-query-replace-regexp] to run `query-replace-regexp'\
with the last search string.
Type \\[isearch-occur] to run `occur' that shows\
the last search string.
Type \\[isearch-highlight-regexp] to run `highlight-regexp'\
that highlights the last search string.
Type \\[isearch-describe-bindings] to display all Isearch key bindings.
Type \\[isearch-describe-key] to display documentation of Isearch key.
Type \\[isearch-describe-mode] to display documentation of Isearch mode.
If an input method is turned on in the current buffer, that input
method is also active while you are typing characters to search.
To toggle the input method, type \\[isearch-toggle-input-method]. \
It also toggles the input
method in the current buffer.
To use a different input method for searching, type \
\\[isearch-toggle-specified-input-method],
and specify an input method you want to use.
The above keys, bound in `isearch-mode-map', are often controlled by
options; do \\[apropos] on search-.* to find them.
Other control and meta characters terminate the search
and are then executed normally (depending on `search-exit-option').
Likewise for function keys and mouse button events.
If this function is called non-interactively with a nil NO-RECURSIVE-EDIT,
it does not return to the calling function until the search is done.
See the function `isearch-mode' for more information."
(interactive "P\np")
(isearch-mode t (not (null regexp-p)) nil (not no-recursive-edit)))
(defun isearch-forward-regexp (&optional not-regexp no-recursive-edit)
"Do incremental search forward for regular expression.
With a prefix argument, do a regular string search instead.
Like ordinary incremental search except that your input is treated
as a regexp. See the command `isearch-forward' for more information.
In incremental searches, a space or spaces normally matches any
whitespace defined by the variable `search-whitespace-regexp'.
To search for a literal space and nothing else, enter C-q SPC.
To toggle whitespace matching, use `isearch-toggle-lax-whitespace'."
(interactive "P\np")
(isearch-mode t (null not-regexp) nil (not no-recursive-edit)))
(defun isearch-forward-word (&optional not-word no-recursive-edit)
"Do incremental search forward for a sequence of words.
With a prefix argument, do a regular string search instead.
Like ordinary incremental search except that your input is treated
as a sequence of words without regard to how the words are separated.
See the command `isearch-forward' for more information."
(interactive "P\np")
(isearch-mode t nil nil (not no-recursive-edit) (null not-word)))
(defun isearch-forward-symbol (&optional _not-symbol no-recursive-edit)
"Do incremental search forward for a symbol.
The prefix argument is currently unused.
Like ordinary incremental search except that your input is treated
as a symbol surrounded by symbol boundary constructs \\_< and \\_>.
See the command `isearch-forward' for more information."
(interactive "P\np")
(isearch-mode t nil nil (not no-recursive-edit) 'isearch-symbol-regexp))
(defun isearch-backward (&optional regexp-p no-recursive-edit)
"Do incremental search backward.
With a prefix argument, do a regular expression search instead.
See the command `isearch-forward' for more information."
(interactive "P\np")
(isearch-mode nil (not (null regexp-p)) nil (not no-recursive-edit)))
(defun isearch-backward-regexp (&optional not-regexp no-recursive-edit)
"Do incremental search backward for regular expression.
With a prefix argument, do a regular string search instead.
Like ordinary incremental search except that your input is treated
as a regexp. See the command `isearch-forward' for more information."
(interactive "P\np")
(isearch-mode nil (null not-regexp) nil (not no-recursive-edit)))
(defun isearch-forward-symbol-at-point ()
"Do incremental search forward for a symbol found near point.
Like ordinary incremental search except that the symbol found at point
is added to the search string initially as a regexp surrounded
by symbol boundary constructs \\_< and \\_>.
See the command `isearch-forward-symbol' for more information."
(interactive)
(isearch-forward-symbol nil 1)
(let ((bounds (find-tag-default-bounds)))
(cond
(bounds
(when (< (car bounds) (point))
(goto-char (car bounds)))
(isearch-yank-string
(buffer-substring-no-properties (car bounds) (cdr bounds))))
(t
(setq isearch-error "No symbol at point")
(isearch-update)))))
\f
(defvar cursor-sensor-inhibit)
;; isearch-mode only sets up incremental search for the minor mode.
;; All the work is done by the isearch-mode commands.
;; Not used yet:
;;(defvar isearch-commands '(isearch-forward isearch-backward
;; isearch-forward-regexp isearch-backward-regexp)
;; "List of commands for which isearch-mode does not recursive-edit.")
(defun isearch-mode (forward &optional regexp op-fun recursive-edit regexp-function)
"Start Isearch minor mode.
It is called by the function `isearch-forward' and other related functions.
The non-nil arg FORWARD means searching in the forward direction.
The non-nil arg REGEXP does an incremental regular expression search.
The arg OP-FUN is a function to be called after each input character
is processed. (It is not called after characters that exit the search.)
When the arg RECURSIVE-EDIT is non-nil, this function behaves modally and
does not return to the calling function until the search is completed.
To behave this way it enters a recursive-edit and exits it when done
isearching.
The arg REGEXP-FUNCTION, if non-nil, should be a function. It is
used to set the value of `isearch-regexp-function'."
;; Initialize global vars.
(setq isearch-forward forward
isearch-regexp (or regexp
(and (not regexp-function)
(eq search-default-regexp-mode t)))
isearch-regexp-function (or regexp-function
(and (functionp search-default-regexp-mode)
(not regexp)
search-default-regexp-mode))
isearch-op-fun op-fun
isearch-last-case-fold-search isearch-case-fold-search
isearch-case-fold-search case-fold-search
isearch-invisible search-invisible
isearch-string ""
isearch-message ""
isearch-cmds nil
isearch-success t
isearch-wrapped nil
isearch-barrier (point)
isearch-adjusted nil
isearch-yank-flag nil
isearch-error nil
isearch-slow-terminal-mode (and (<= baud-rate search-slow-speed)
(> (window-height)
(* 4
(abs search-slow-window-lines))))
isearch-other-end nil
isearch-small-window nil
isearch-just-started t
isearch-start-hscroll (window-hscroll)
isearch-opoint (point)
search-ring-yank-pointer nil
isearch-opened-overlays nil
isearch-input-method-function input-method-function
isearch-input-method-local-p (local-variable-p 'input-method-function)
regexp-search-ring-yank-pointer nil
;; Save the original value of `minibuffer-message-timeout', and
;; set it to nil so that isearch's messages don't get timed out.
isearch-original-minibuffer-message-timeout minibuffer-message-timeout
minibuffer-message-timeout nil)
;; We must bypass input method while reading key. When a user type
;; printable character, appropriate input method is turned on in
;; minibuffer to read multibyte characters.
(or isearch-input-method-local-p
(make-local-variable 'input-method-function))
(setq input-method-function nil)
(looking-at "")
(setq isearch-window-configuration
(if isearch-slow-terminal-mode (current-window-configuration) nil))
;; Maybe make minibuffer frame visible and/or raise it.
(let ((frame (window-frame (minibuffer-window))))
(unless (memq (frame-live-p frame) '(nil t))
(unless (frame-visible-p frame)
(make-frame-visible frame))
(if minibuffer-auto-raise
(raise-frame frame))))
(setq isearch-mode " Isearch") ;; forward? regexp?
(force-mode-line-update)
(setq overriding-terminal-local-map isearch-mode-map)
(run-hooks 'isearch-mode-hook)
;; Remember the initial map possibly modified
;; by external packages in isearch-mode-hook. (Bug#16035)
(setq isearch--saved-overriding-local-map overriding-terminal-local-map)
;; Pushing the initial state used to be before running isearch-mode-hook,
;; but a hook might set `isearch-push-state-function' used in
;; `isearch-push-state' to save mode-specific initial state. (Bug#4994)
(isearch-push-state)
(isearch-update)
(add-hook 'pre-command-hook 'isearch-pre-command-hook)
(add-hook 'post-command-hook 'isearch-post-command-hook)
(add-hook 'mouse-leave-buffer-hook 'isearch-done)
(add-hook 'kbd-macro-termination-hook 'isearch-done)
;; isearch-mode can be made modal (in the sense of not returning to
;; the calling function until searching is completed) by entering
;; a recursive-edit and exiting it when done isearching.
(if recursive-edit
(let ((isearch-recursive-edit t))
(recursive-edit)))
isearch-success)
;; Some high level utilities. Others below.
(defvar isearch--current-buffer nil)
(defun isearch-update ()
"This is called after every isearch command to update the display.
The last thing it does is to run `isearch-update-post-hook'."
(unless (eq (current-buffer) isearch--current-buffer)
(when (buffer-live-p isearch--current-buffer)
(with-current-buffer isearch--current-buffer
(setq cursor-sensor-inhibit (delq 'isearch cursor-sensor-inhibit))))
(setq isearch--current-buffer (current-buffer))
(make-local-variable 'cursor-sensor-inhibit)
(unless (boundp 'cursor-sensor-inhibit)
(setq cursor-sensor-inhibit nil))
;; Suspend things like cursor-intangible during Isearch so we can search
;; even within intangible text.
(push 'isearch cursor-sensor-inhibit))
(if (and (null unread-command-events)
(null executing-kbd-macro))
(progn
(if (not (input-pending-p))
(if isearch-message-function
(funcall isearch-message-function)
(isearch-message)))
(if (and isearch-slow-terminal-mode
(not (or isearch-small-window
(pos-visible-in-window-p))))
(let ((found-point (point)))
(setq isearch-small-window t)
(move-to-window-line 0)
(let ((window-min-height 1))
(split-window nil (if (< search-slow-window-lines 0)
(1+ (- search-slow-window-lines))
(- (window-height)
(1+ search-slow-window-lines)))))
(if (< search-slow-window-lines 0)
(progn (vertical-motion (- 1 search-slow-window-lines))
(set-window-start (next-window) (point))
(set-window-hscroll (next-window)
(window-hscroll))
(set-window-hscroll (selected-window) 0))
(other-window 1))
(goto-char found-point))
;; Keep same hscrolling as at the start of the search when possible
(let ((current-scroll (window-hscroll))
visible-p)
(set-window-hscroll (selected-window) isearch-start-hscroll)
(setq visible-p (pos-visible-in-window-p nil nil t))
(if (or (not visible-p)
;; When point is not visible because of hscroll,
;; pos-visible-in-window-p returns non-nil, but
;; the X coordinate it returns is 1 pixel beyond
;; the last visible one.
(>= (car visible-p) (window-body-width nil t)))
(set-window-hscroll (selected-window) current-scroll))))
(if isearch-other-end
(if (< isearch-other-end (point)) ; isearch-forward?
(isearch-highlight isearch-other-end (point))
(isearch-highlight (point) isearch-other-end))
(isearch-dehighlight))))
(setq ;; quit-flag nil not for isearch-mode
isearch-adjusted nil
isearch-yank-flag nil)
(when isearch-lazy-highlight
(isearch-lazy-highlight-new-loop))
;; We must prevent the point moving to the end of composition when a
;; part of the composition has just been searched.
(setq disable-point-adjustment t)
(run-hooks 'isearch-update-post-hook))
(defun isearch-done (&optional nopush edit)
"Exit Isearch mode.
For successful search, pass no args.
For a failing search, NOPUSH is t.
For going to the minibuffer to edit the search string,
NOPUSH is t and EDIT is t."
(if isearch-resume-in-command-history
(let ((command `(isearch-resume ,isearch-string ,isearch-regexp
,isearch-regexp-function ,isearch-forward
,isearch-message
',isearch-case-fold-search)))
(unless (equal (car command-history) command)
(setq command-history (cons command command-history)))))
(remove-hook 'pre-command-hook 'isearch-pre-command-hook)
(remove-hook 'post-command-hook 'isearch-post-command-hook)
(remove-hook 'mouse-leave-buffer-hook 'isearch-done)
(remove-hook 'kbd-macro-termination-hook 'isearch-done)
(setq isearch-lazy-highlight-start nil)
(with-current-buffer isearch--current-buffer
(setq isearch--current-buffer nil)
(setq cursor-sensor-inhibit (delq 'isearch cursor-sensor-inhibit)))
;; Called by all commands that terminate isearch-mode.
;; If NOPUSH is non-nil, we don't push the string on the search ring.
(setq overriding-terminal-local-map nil)
;; (setq pre-command-hook isearch-old-pre-command-hook) ; for lemacs
(setq minibuffer-message-timeout isearch-original-minibuffer-message-timeout)
(isearch-dehighlight)
(lazy-highlight-cleanup lazy-highlight-cleanup)
(let ((found-start (window-start))
(found-point (point)))
(when isearch-window-configuration
(set-window-configuration isearch-window-configuration)
(if isearch-small-window
(goto-char found-point)
;; set-window-configuration clobbers window-start; restore it.
;; This has an annoying side effect of clearing the last_modiff
;; field of the window, which can cause unwanted scrolling,
;; so don't do it unless truly necessary.
(set-window-start (selected-window) found-start t))))
(setq isearch-mode nil)
(if isearch-input-method-local-p
(setq input-method-function isearch-input-method-function)
(kill-local-variable 'input-method-function))
(force-mode-line-update)
;; If we ended in the middle of some intangible text,
;; move to the further end of that intangible text.
(let ((after (if (eobp) nil
(get-text-property (point) 'intangible)))
(before (if (bobp) nil
(get-text-property (1- (point)) 'intangible))))
(when (and before after (eq before after))
(goto-char
(if isearch-forward
(next-single-property-change (point) 'intangible)
(previous-single-property-change (point) 'intangible)))))
(if (and (> (length isearch-string) 0) (not nopush))
;; Update the ring data.
(isearch-update-ring isearch-string isearch-regexp))
(let ((isearch-mode-end-hook-quit (and nopush (not edit))))
(run-hooks 'isearch-mode-end-hook))
;; If there was movement, mark the starting position.
;; Maybe should test difference between and set mark only if > threshold.
(if (/= (point) isearch-opoint)
(or (and transient-mark-mode mark-active)
(progn
(push-mark isearch-opoint t)
(or executing-kbd-macro (> (minibuffer-depth) 0) edit
(message "Mark saved where search started")))))
(and (not edit) isearch-recursive-edit (exit-recursive-edit)))
(defun isearch-update-ring (string &optional regexp)
"Add STRING to the beginning of the search ring.
REGEXP if non-nil says use the regexp search ring."
(add-to-history
(if regexp 'regexp-search-ring 'search-ring)
string
(if regexp regexp-search-ring-max search-ring-max)))
;; Switching buffers should first terminate isearch-mode.
;; ;; For Emacs 19, the frame switch event is handled.
;; (defun isearch-switch-frame-handler ()
;; (interactive) ;; Is this necessary?
;; ;; First terminate isearch-mode.
;; (isearch-done)
;; (isearch-clean-overlays)
;; (handle-switch-frame (car (cdr last-command-event))))
\f
;; The search status structure and stack.
(cl-defstruct (isearch--state
(:constructor nil)
(:copier nil)
(:constructor isearch--get-state
(&aux
(string isearch-string)
(message isearch-message)
(point (point))
(success isearch-success)
(forward isearch-forward)
(other-end isearch-other-end)
(word isearch-regexp-function)
(error isearch-error)
(wrapped isearch-wrapped)
(barrier isearch-barrier)
(case-fold-search isearch-case-fold-search)
(pop-fun (if isearch-push-state-function
(funcall isearch-push-state-function))))))
(string :read-only t)
(message :read-only t)
(point :read-only t)
(success :read-only t)
(forward :read-only t)
(other-end :read-only t)
(word :read-only t)
(error :read-only t)
(wrapped :read-only t)
(barrier :read-only t)
(case-fold-search :read-only t)
(pop-fun :read-only t))
(defun isearch--set-state (cmd)
(setq isearch-string (isearch--state-string cmd)
isearch-message (isearch--state-message cmd)
isearch-success (isearch--state-success cmd)
isearch-forward (isearch--state-forward cmd)
isearch-other-end (isearch--state-other-end cmd)
isearch-regexp-function (isearch--state-word cmd)
isearch-error (isearch--state-error cmd)
isearch-wrapped (isearch--state-wrapped cmd)
isearch-barrier (isearch--state-barrier cmd)
isearch-case-fold-search (isearch--state-case-fold-search cmd))
(if (functionp (isearch--state-pop-fun cmd))
(funcall (isearch--state-pop-fun cmd) cmd))
(goto-char (isearch--state-point cmd)))
(defun isearch-pop-state ()
(setq isearch-cmds (cdr isearch-cmds))
(isearch--set-state (car isearch-cmds)))
(defun isearch-push-state ()
(push (isearch--get-state) isearch-cmds))
\f
;; Commands active while inside of the isearch minor mode.
(defun isearch-exit ()
"Exit search normally.
However, if this is the first command after starting incremental
search and `search-nonincremental-instead' is non-nil, do a
nonincremental search instead via `isearch-edit-string'."
(interactive)
(if (and search-nonincremental-instead
(= 0 (length isearch-string)))
(let ((isearch-nonincremental t))
(isearch-edit-string)) ;; this calls isearch-done as well
(isearch-done))
(isearch-clean-overlays))
(defun isearch-fail-pos (&optional msg)
"Return position of first mismatch in search string, or nil if none.
If MSG is non-nil, use variable `isearch-message', otherwise `isearch-string'."
(let ((cmds isearch-cmds)
(curr-msg (if msg isearch-message isearch-string))
succ-msg)
(when (or (not isearch-success) isearch-error)
(while (and cmds
(or (not (isearch--state-success (car cmds)))
(isearch--state-error (car cmds))))
(pop cmds))
(setq succ-msg (and cmds (if msg (isearch--state-message (car cmds))
(isearch--state-string (car cmds)))))
(if (and (stringp succ-msg)
(< (length succ-msg) (length curr-msg))
(equal succ-msg
(substring curr-msg 0 (length succ-msg))))
(length succ-msg)
0))))
(defmacro with-isearch-suspended (&rest body)
"Exit Isearch mode, run BODY, and reinvoke the pending search.
You can update the global isearch variables by setting new values to
`isearch-new-string', `isearch-new-message', `isearch-new-forward',
`isearch-new-regexp-function', `isearch-new-case-fold'."
;; This code is very hairy for several reasons, explained in the code.
;; Mainly, isearch-mode must be terminated while editing and then restarted.
;; If there were a way to catch any change of buffer from the minibuffer,
;; this could be simplified greatly.
;; Editing doesn't back up the search point. Should it?
`(condition-case nil
(progn
(let ((isearch-nonincremental isearch-nonincremental)
;; Locally bind all isearch global variables to protect them
;; from recursive isearching.
;; isearch-string -message and -forward are not bound
;; so they may be changed. Instead, save the values.
(isearch-new-string isearch-string)
(isearch-new-message isearch-message)
(isearch-new-forward isearch-forward)
(isearch-new-regexp-function isearch-regexp-function)
(isearch-new-case-fold isearch-case-fold-search)
(isearch-regexp isearch-regexp)
(isearch-op-fun isearch-op-fun)
(isearch-cmds isearch-cmds)
(isearch-success isearch-success)
(isearch-wrapped isearch-wrapped)
(isearch-barrier isearch-barrier)
(isearch-adjusted isearch-adjusted)
(isearch-yank-flag isearch-yank-flag)
(isearch-error isearch-error)
;;; Don't bind this. We want isearch-search, below, to set it.
;;; And the old value won't matter after that.
;;; (isearch-other-end isearch-other-end)
;;; Perhaps some of these other variables should be bound for a
;;; shorter period, ending before the next isearch-search.
;;; But there doesn't seem to be a real bug, so let's not risk it now.
(isearch-opoint isearch-opoint)
(isearch-slow-terminal-mode isearch-slow-terminal-mode)
(isearch-small-window isearch-small-window)
(isearch-recursive-edit isearch-recursive-edit)
;; Save current configuration so we can restore it here.
(isearch-window-configuration (current-window-configuration))
;; This could protect the index of the search rings,
;; but we can't reliably count the number of typed M-p
;; in `read-from-minibuffer' to adjust the index accordingly.
;; So when the following is commented out, `isearch-mode'
;; below resets the index to the predictable value nil.
;; (search-ring-yank-pointer search-ring-yank-pointer)
;; (regexp-search-ring-yank-pointer regexp-search-ring-yank-pointer)
;; Temporarily restore `minibuffer-message-timeout'.
(minibuffer-message-timeout
isearch-original-minibuffer-message-timeout)
(isearch-original-minibuffer-message-timeout
isearch-original-minibuffer-message-timeout)
old-point old-other-end)
;; Actually terminate isearching until editing is done.
;; This is so that the user can do anything without failure,
;; like switch buffers and start another isearch, and return.
(condition-case nil
(isearch-done t t)
(exit nil)) ; was recursive editing
;; Save old point and isearch-other-end before reading from minibuffer
;; that can change their values.
(setq old-point (point) old-other-end isearch-other-end)
(unwind-protect
(progn ,@body)
;; Set point at the start (end) of old match if forward (backward),
;; so after exiting minibuffer isearch resumes at the start (end)
;; of this match and can find it again.
(if (and old-other-end (eq old-point (point))
(eq isearch-forward isearch-new-forward))
(goto-char old-other-end))
;; Always resume isearching by restarting it.
(isearch-mode isearch-forward
isearch-regexp
isearch-op-fun
nil
isearch-regexp-function)
;; Copy new local values to isearch globals
(setq isearch-string isearch-new-string
isearch-message isearch-new-message
isearch-forward isearch-new-forward
isearch-regexp-function isearch-new-regexp-function
isearch-case-fold-search isearch-new-case-fold))
;; Empty isearch-string means use default.
(when (= 0 (length isearch-string))
(setq isearch-string (or (car (if isearch-regexp
regexp-search-ring
search-ring))
"")
isearch-message
(mapconcat 'isearch-text-char-description
isearch-string ""))
;; After taking the last element, adjust ring to previous one.
(isearch-ring-adjust1 nil)))
;; This used to push the state as of before this C-s, but it adds
;; an inconsistent state where part of variables are from the
;; previous search (e.g. `isearch-success'), and part of variables
;; are just entered from the minibuffer (e.g. `isearch-string').
;; (isearch-push-state)
;; Reinvoke the pending search.
(isearch-search)
(isearch-push-state) ; this pushes the correct state
(isearch-update)
(if isearch-nonincremental
(progn
;; (sit-for 1) ;; needed if isearch-done does: (message "")
(isearch-done)
;; The search done message is confusing when the string
;; is empty, so erase it.
(if (equal isearch-string "")
(message "")))))
(quit ; handle abort-recursive-edit
(isearch-abort) ;; outside of let to restore outside global values
)))
(defvar minibuffer-history-symbol) ;; from external package gmhist.el
(defun isearch-edit-string ()
"Edit the search string in the minibuffer.
The following additional command keys are active while editing.
\\<minibuffer-local-isearch-map>
\\[exit-minibuffer] to resume incremental searching with the edited string.
\\[isearch-forward-exit-minibuffer] to resume isearching forward.
\\[isearch-reverse-exit-minibuffer] to resume isearching backward.
\\[isearch-complete-edit] to complete the search string using the search ring."
(interactive)
(with-isearch-suspended
(let* ((message-log-max nil)
;; Don't add a new search string to the search ring here
;; in `read-from-minibuffer'. It should be added only
;; by `isearch-update-ring' called from `isearch-done'.
(history-add-new-input nil)
;; Binding minibuffer-history-symbol to nil is a work-around
;; for some incompatibility with gmhist.
(minibuffer-history-symbol))
(setq isearch-new-string
(read-from-minibuffer
(isearch-message-prefix nil isearch-nonincremental)
(cons isearch-string (1+ (or (isearch-fail-pos)
(length isearch-string))))
minibuffer-local-isearch-map nil
(if isearch-regexp
(cons 'regexp-search-ring
(1+ (or regexp-search-ring-yank-pointer -1)))
(cons 'search-ring
(1+ (or search-ring-yank-pointer -1))))
nil t)
isearch-new-message
(mapconcat 'isearch-text-char-description
isearch-new-string "")))))
(defun isearch-nonincremental-exit-minibuffer ()
(interactive)
(setq isearch-nonincremental t)
(exit-minibuffer))
;; Changing the value of `isearch-nonincremental' has no effect here,
;; because `isearch-edit-string' ignores this change. Thus marked as obsolete.
(make-obsolete 'isearch-nonincremental-exit-minibuffer 'exit-minibuffer "24.4")
(defun isearch-forward-exit-minibuffer ()
"Resume isearching forward from the minibuffer that edits the search string."
(interactive)
(setq isearch-new-forward t)
(exit-minibuffer))
(defun isearch-reverse-exit-minibuffer ()
"Resume isearching backward from the minibuffer that edits the search string."
(interactive)
(setq isearch-new-forward nil)
(exit-minibuffer))
(defun isearch-cancel ()
"Terminate the search and go back to the starting point."
(interactive)
(if (and isearch-push-state-function isearch-cmds)
;; For defined push-state function, restore the first state.
;; This calls pop-state function and restores original point.
(let ((isearch-cmds (last isearch-cmds)))
(isearch--set-state (car isearch-cmds)))
(goto-char isearch-opoint))
(isearch-done t) ; Exit isearch..
(isearch-clean-overlays)
(signal 'quit nil)) ; ..and pass on quit signal.
(defun isearch-abort ()
"Abort incremental search mode if searching is successful, signaling quit.
Otherwise, revert to previous successful search and continue searching.
Use `isearch-exit' to quit without signaling."
(interactive)
;; (ding) signal instead below, if quitting
(discard-input)
(if (and isearch-success (not isearch-error))
;; If search is successful and has no incomplete regexp,
;; move back to starting point and really do quit.
(progn
(setq isearch-success nil)
(isearch-cancel))
;; If search is failing, or has an incomplete regexp,
;; rub out until it is once more successful.
(while (or (not isearch-success) isearch-error)
(isearch-pop-state))
(isearch-update)))
(defun isearch-repeat (direction)
;; Utility for isearch-repeat-forward and -backward.
(if (eq isearch-forward (eq direction 'forward))
;; C-s in forward or C-r in reverse.
(if (equal isearch-string "")
;; If search string is empty, use last one.
(if (null (if isearch-regexp regexp-search-ring search-ring))
(setq isearch-error "No previous search string")
(setq isearch-string
(car (if isearch-regexp regexp-search-ring search-ring))
isearch-message
(mapconcat 'isearch-text-char-description
isearch-string "")
isearch-case-fold-search isearch-last-case-fold-search)
;; After taking the last element, adjust ring to previous one.
(isearch-ring-adjust1 nil))
;; If already have what to search for, repeat it.
(or isearch-success
(progn
;; Set isearch-wrapped before calling isearch-wrap-function
(setq isearch-wrapped t)
(if isearch-wrap-function
(funcall isearch-wrap-function)
(goto-char (if isearch-forward (point-min) (point-max)))))))
;; C-s in reverse or C-r in forward, change direction.
(setq isearch-forward (not isearch-forward)
isearch-success t))
(setq isearch-barrier (point)) ; For subsequent \| if regexp.
(if (equal isearch-string "")
(setq isearch-success t)
(if (and isearch-success
(equal (point) isearch-other-end)
(not isearch-just-started))
;; If repeating a search that found
;; an empty string, ensure we advance.
(if (if isearch-forward (eobp) (bobp))
;; If there's nowhere to advance to, fail (and wrap next time).
(progn
(setq isearch-success nil)
(ding))
(forward-char (if isearch-forward 1 -1))
(isearch-search))
(isearch-search)))
(isearch-push-state)
(isearch-update))
(defun isearch-repeat-forward ()
"Repeat incremental search forwards."
(interactive)
(isearch-repeat 'forward))
(defun isearch-repeat-backward ()
"Repeat incremental search backwards."
(interactive)
(isearch-repeat 'backward))
\f
;;; Toggles for `isearch-regexp-function' and `search-default-regexp-mode'.
(defmacro isearch-define-mode-toggle (mode key function &optional docstring &rest body)
"Define a command called `isearch-toggle-MODE' and bind it to `M-s KEY'.
The first line of the docstring is auto-generated, the remainder
may be provided in DOCSTRING.
If FUNCTION is a symbol, this command first toggles the value of
`isearch-regexp-function' between nil and FUNCTION. Also set the
`isearch-message-prefix' property of FUNCTION.
The command then executes BODY and updates the isearch prompt."
(declare (indent defun))
(let ((command-name (intern (format "isearch-toggle-%s" mode))))
`(progn
(defun ,command-name ()
,(format "Toggle %s searching on or off.%s" mode
(if docstring (concat "\n" docstring) ""))
(interactive)
,@(when function
`((setq isearch-regexp-function
(unless (eq isearch-regexp-function #',function)
#',function))
(when isearch-regexp-function (setq isearch-regexp nil))))
,@body
(setq isearch-success t isearch-adjusted t)
(isearch-update))
(define-key isearch-mode-map ,(concat "\M-s" key) #',command-name)
,@(when (symbolp function)
`((put ',function 'isearch-message-prefix ,(format "%s " mode))
(cl-callf (lambda (types) (cons 'choice
(cons '(const :tag ,(capitalize (format "%s search" mode)) ,function)
(cdr types))))
(get 'search-default-regexp-mode 'custom-type)))))))
(isearch-define-mode-toggle word "w" word-search-regexp)
(isearch-define-mode-toggle symbol "_" isearch-symbol-regexp)
(isearch-define-mode-toggle character-fold "'" character-fold-to-regexp)
(put 'character-fold-to-regexp 'isearch-message-prefix "char-fold ")
(isearch-define-mode-toggle regexp "r" nil nil
(setq isearch-regexp (not isearch-regexp))
(if isearch-regexp (setq isearch-regexp-function nil)))
(defun isearch--momentary-message (string)
"Print STRING at the end of the isearch prompt for 1 second"
(let ((message-log-max nil))
(message "%s%s [%s]"
(isearch-message-prefix nil isearch-nonincremental)
isearch-message
string))
(sit-for 1))
(isearch-define-mode-toggle lax-whitespace " " nil
"In ordinary search, toggles the value of the variable
`isearch-lax-whitespace'. In regexp search, toggles the
value of the variable `isearch-regexp-lax-whitespace'."
(isearch--momentary-message
(if (if isearch-regexp
(setq isearch-regexp-lax-whitespace (not isearch-regexp-lax-whitespace))
(setq isearch-lax-whitespace (not isearch-lax-whitespace)))
"match spaces loosely"
"match spaces literally")))
(isearch-define-mode-toggle case-fold "c" nil
"Toggles the value of the variable `isearch-case-fold-search'."
(isearch--momentary-message
(if (setq isearch-case-fold-search
(if isearch-case-fold-search nil 'yes))
"case insensitive"
"case sensitive")))
(isearch-define-mode-toggle invisible "i" nil
"This determines whether to search inside invisible text or not.
Toggles the variable `isearch-invisible' between values
nil and a non-nil value of the option `search-invisible'
\(or `open' if `search-invisible' is nil)."
"match %svisible text"
(isearch--momentary-message
(if (setq isearch-invisible
(if isearch-invisible
nil (or search-invisible 'open)))
"match invisible text"
"match visible text")))
\f
;; Word search
(defun word-search-regexp (string &optional lax)
"Return a regexp which matches words, ignoring punctuation.
Given STRING, a string of words separated by word delimiters,
compute a regexp that matches those exact words separated by
arbitrary punctuation. If the string begins or ends in whitespace,
the beginning or the end of the string matches arbitrary whitespace.
Otherwise if LAX is non-nil, the beginning or the end of the string
need not match a word boundary.
Used in `word-search-forward', `word-search-backward',
`word-search-forward-lax', `word-search-backward-lax'."
(cond
((equal string "") "")
((string-match-p "\\`\\W+\\'" string) "\\W+")
(t (concat
(if (string-match-p "\\`\\W" string) "\\W+"
(unless lax "\\<"))
(mapconcat 'regexp-quote (split-string string "\\W+" t) "\\W+")
(if (string-match-p "\\W\\'" string) "\\W+"
(unless lax "\\>"))))))
(defun word-search-backward (string &optional bound noerror count)
"Search backward from point for STRING, ignoring differences in punctuation.
Set point to the beginning of the occurrence found, and return point.
An optional second argument bounds the search; it is a buffer position.
The match found must not extend before that position.
Optional third argument, if t, means if fail just return nil (no error).
If not nil and not t, move to limit of search and return nil.
Optional fourth argument is repeat count--search for successive occurrences.
Relies on the function `word-search-regexp' to convert a sequence
of words in STRING to a regexp used to search words without regard
to punctuation."
(interactive "sWord search backward: ")
(re-search-backward (word-search-regexp string nil) bound noerror count))
(defun word-search-forward (string &optional bound noerror count)
"Search forward from point for STRING, ignoring differences in punctuation.
Set point to the end of the occurrence found, and return point.
An optional second argument bounds the search; it is a buffer position.
The match found must not extend after that position.
Optional third argument, if t, means if fail just return nil (no error).
If not nil and not t, move to limit of search and return nil.
Optional fourth argument is repeat count--search for successive occurrences.
Relies on the function `word-search-regexp' to convert a sequence
of words in STRING to a regexp used to search words without regard
to punctuation."
(interactive "sWord search: ")
(re-search-forward (word-search-regexp string nil) bound noerror count))
(defun word-search-backward-lax (string &optional bound noerror count)
"Search backward from point for STRING, ignoring differences in punctuation.
Set point to the beginning of the occurrence found, and return point.
Unlike `word-search-backward', the end of STRING need not match a word
boundary, unless STRING ends in whitespace.
An optional second argument bounds the search; it is a buffer position.
The match found must not extend before that position.
Optional third argument, if t, means if fail just return nil (no error).
If not nil and not t, move to limit of search and return nil.
Optional fourth argument is repeat count--search for successive occurrences.
Relies on the function `word-search-regexp' to convert a sequence
of words in STRING to a regexp used to search words without regard
to punctuation."
(interactive "sWord search backward: ")
(re-search-backward (word-search-regexp string t) bound noerror count))
(defun word-search-forward-lax (string &optional bound noerror count)
"Search forward from point for STRING, ignoring differences in punctuation.
Set point to the end of the occurrence found, and return point.
Unlike `word-search-forward', the end of STRING need not match a word
boundary, unless STRING ends in whitespace.
An optional second argument bounds the search; it is a buffer position.
The match found must not extend after that position.
Optional third argument, if t, means if fail just return nil (no error).
If not nil and not t, move to limit of search and return nil.
Optional fourth argument is repeat count--search for successive occurrences.
Relies on the function `word-search-regexp' to convert a sequence
of words in STRING to a regexp used to search words without regard
to punctuation."
(interactive "sWord search: ")
(re-search-forward (word-search-regexp string t) bound noerror count))
;; Symbol search
(defun isearch-symbol-regexp (string &optional lax)
"Return a regexp which matches STRING as a symbol.
Creates a regexp where STRING is surrounded by symbol delimiters \\_< and \\_>.
If there are more than one symbol, then compute a regexp that matches
those exact symbols separated by non-symbol characters. If the string
begins or ends in whitespace, the beginning or the end of the string
matches arbitrary non-symbol whitespace. Otherwise if LAX is non-nil,
the beginning or the end of the string need not match a symbol boundary."
(let ((not-word-symbol-re
;; This regexp matches all syntaxes except word and symbol syntax.
;; FIXME: Replace it with something shorter if possible (bug#14602).
"\\(?:\\s-\\|\\s.\\|\\s(\\|\\s)\\|\\s\"\\|\\s\\\\|\\s/\\|\\s$\\|\\s'\\|\\s<\\|\\s>\\|\\s@\\|\\s!\\|\\s|\\)+"))
(cond
((equal string "") "")
((string-match-p (format "\\`%s\\'" not-word-symbol-re) string) not-word-symbol-re)
(t (concat
(if (string-match-p (format "\\`%s" not-word-symbol-re) string) not-word-symbol-re
(unless lax "\\_<"))
(mapconcat 'regexp-quote (split-string string not-word-symbol-re t) not-word-symbol-re)
(if (string-match-p (format "%s\\'" not-word-symbol-re) string) not-word-symbol-re
(unless lax "\\_>")))))))
(put 'isearch-symbol-regexp 'isearch-message-prefix "symbol ")
;; Search with lax whitespace
(defun search-forward-lax-whitespace (string &optional bound noerror count)
"Search forward for STRING, matching a sequence of whitespace chars."
(let ((search-spaces-regexp search-whitespace-regexp))
(re-search-forward (regexp-quote string) bound noerror count)))
(defun search-backward-lax-whitespace (string &optional bound noerror count)
"Search backward for STRING, matching a sequence of whitespace chars."
(let ((search-spaces-regexp search-whitespace-regexp))
(re-search-backward (regexp-quote string) bound noerror count)))
(defun re-search-forward-lax-whitespace (regexp &optional bound noerror count)
"Search forward for REGEXP, matching a sequence of whitespace chars."
(let ((search-spaces-regexp search-whitespace-regexp))
(re-search-forward regexp bound noerror count)))
(defun re-search-backward-lax-whitespace (regexp &optional bound noerror count)
"Search backward for REGEXP, matching a sequence of whitespace chars."
(let ((search-spaces-regexp search-whitespace-regexp))
(re-search-backward regexp bound noerror count)))
(dolist (old '(re-search-forward-lax-whitespace search-backward-lax-whitespace
search-forward-lax-whitespace re-search-backward-lax-whitespace))
(make-obsolete old
"instead, use (let ((search-spaces-regexp search-whitespace-regexp))
(re-search-... ...))"
"25.1"))
\f
(defun isearch-query-replace (&optional arg regexp-flag)
"Start `query-replace' with string to replace from last search string.
The ARG (prefix arg if interactive), if non-nil, means replace
only matches surrounded by word boundaries. A negative prefix
arg means replace backward. Note that using the prefix arg
is possible only when `isearch-allow-scroll' is non-nil or
`isearch-allow-prefix' is non-nil, and it doesn't always provide the
correct matches for `query-replace', so the preferred way to run word
replacements from Isearch is `M-s w ... M-%'."
(interactive
(list current-prefix-arg))
(barf-if-buffer-read-only)
(if regexp-flag (setq isearch-regexp t))
(let ((case-fold-search isearch-case-fold-search)
;; set `search-upper-case' to nil to not call
;; `isearch-no-upper-case-p' in `perform-replace'
(search-upper-case nil)
(search-invisible isearch-invisible)
(replace-lax-whitespace
isearch-lax-whitespace)
(replace-regexp-lax-whitespace
isearch-regexp-lax-whitespace)
(delimited (and arg (not (eq arg '-))))
(backward (and arg (eq arg '-)))
;; Set `isearch-recursive-edit' to nil to prevent calling
;; `exit-recursive-edit' in `isearch-done' that terminates
;; the execution of this command when it is non-nil.
;; We call `exit-recursive-edit' explicitly at the end below.
(isearch-recursive-edit nil))
(isearch-done nil t)
(isearch-clean-overlays)
(if (and isearch-other-end
(if backward
(> isearch-other-end (point))
(< isearch-other-end (point)))
(not (and transient-mark-mode mark-active
(if backward
(> (mark) (point))
(< (mark) (point))))))
(goto-char isearch-other-end))
(set query-replace-from-history-variable
(cons isearch-string
(symbol-value query-replace-from-history-variable)))
(perform-replace
isearch-string
(query-replace-read-to
isearch-string
(concat "Query replace"
(isearch--describe-regexp-mode (or delimited isearch-regexp-function) t)
(if backward " backward" "")
(if (and transient-mark-mode mark-active) " in region" ""))
isearch-regexp)
t isearch-regexp (or delimited isearch-regexp-function) nil nil
(if (and transient-mark-mode mark-active) (region-beginning))
(if (and transient-mark-mode mark-active) (region-end))
backward))
(and isearch-recursive-edit (exit-recursive-edit)))
(defun isearch-query-replace-regexp (&optional arg)
"Start `query-replace-regexp' with string to replace from last search string.
See `isearch-query-replace' for more information."
(interactive
(list current-prefix-arg))
(isearch-query-replace arg t))
(defun isearch-occur (regexp &optional nlines)
"Run `occur' using the last search string as the regexp.
Interactively, REGEXP is constructed using the search string from the
last search command. NLINES has the same meaning as in `occur'.
If the last search command was a word search, REGEXP is computed from
the search words, ignoring punctuation. If the last search
command was a regular expression search, REGEXP is the regular
expression used in that search. If the last search command searched
for a literal string, REGEXP is constructed by quoting all the special
characters in that string."
(interactive
(let* ((perform-collect (consp current-prefix-arg))
(regexp (cond
((functionp isearch-regexp-function)
(funcall isearch-regexp-function isearch-string))
(isearch-regexp-function (word-search-regexp isearch-string))
(isearch-regexp isearch-string)
(t (regexp-quote isearch-string)))))
(list regexp
(if perform-collect
;; Perform collect operation
(if (zerop (regexp-opt-depth regexp))
;; No subexpression so collect the entire match.
"\\&"
;; Get the regexp for collection pattern.
(let ((default (car occur-collect-regexp-history))
regexp-collect)
(with-isearch-suspended
(setq regexp-collect
(read-regexp
(format "Regexp to collect (default %s): " default)
default 'occur-collect-regexp-history)))
regexp-collect))
;; Otherwise normal occur takes numerical prefix argument.
(when current-prefix-arg
(prefix-numeric-value current-prefix-arg))))))
(let ((case-fold-search isearch-case-fold-search)
;; Set `search-upper-case' to nil to not call
;; `isearch-no-upper-case-p' in `occur-1'.
(search-upper-case nil)
(search-spaces-regexp
(if (if isearch-regexp
isearch-regexp-lax-whitespace
isearch-lax-whitespace)
search-whitespace-regexp)))
(occur regexp nlines)))
(declare-function hi-lock-read-face-name "hi-lock" ())
(defun isearch-highlight-regexp ()
"Run `highlight-regexp' with regexp from the current search string.
It exits Isearch mode and calls `hi-lock-face-buffer' with its regexp
argument from the last search regexp or a quoted search string,
and reads its face argument using `hi-lock-read-face-name'."
(interactive)
(let (
;; Set `isearch-recursive-edit' to nil to prevent calling
;; `exit-recursive-edit' in `isearch-done' that terminates
;; the execution of this command when it is non-nil.
;; We call `exit-recursive-edit' explicitly at the end below.
(isearch-recursive-edit nil))
(isearch-done nil t)
(isearch-clean-overlays))
(require 'hi-lock nil t)
(let ((regexp (cond ((functionp isearch-regexp-function)
(funcall isearch-regexp-function isearch-string))
(isearch-regexp-function (word-search-regexp isearch-string))
(isearch-regexp isearch-string)
((if (and (eq isearch-case-fold-search t)
search-upper-case)
(isearch-no-upper-case-p
isearch-string isearch-regexp)
isearch-case-fold-search)
;; Turn isearch-string into a case-insensitive
;; regexp.
(mapconcat
(lambda (c)
(let ((s (string c)))
(if (string-match "[[:alpha:]]" s)
(format "[%s%s]" (upcase s) (downcase s))
(regexp-quote s))))
isearch-string ""))
(t (regexp-quote isearch-string)))))
(hi-lock-face-buffer regexp (hi-lock-read-face-name)))
(and isearch-recursive-edit (exit-recursive-edit)))
\f
(defun isearch-delete-char ()
"Discard last input item and move point back.
Last input means the last character or the last isearch command
that added or deleted characters from the search string,
moved point, toggled regexp mode or case-sensitivity, etc.
If no previous match was done, just beep."
(interactive)
(if (null (cdr isearch-cmds))
(ding)
(isearch-pop-state))
(isearch-update))
(defun isearch-del-char (&optional arg)
"Delete character from end of search string and search again.
Unlike `isearch-delete-char', it only deletes the last character,
but doesn't cancel the effect of other isearch command.
If search string is empty, just beep."
(interactive "p")
(if (= 0 (length isearch-string))
(ding)
(setq isearch-string (substring isearch-string 0
(- (min (or arg 1)
(length isearch-string))))
isearch-message (mapconcat 'isearch-text-char-description
isearch-string "")))
;; Use the isearch-other-end as new starting point to be able
;; to find the remaining part of the search string again.
;; This is like what `isearch-search-and-update' does,
;; but currently it doesn't support deletion of characters
;; for the case where unsuccessful search may become successful
;; by deletion of characters.
(if isearch-other-end (goto-char isearch-other-end))
(isearch-search)
(isearch-push-state)
(isearch-update))
(defun isearch-yank-string (string)
"Pull STRING into search string."
;; Downcase the string if not supposed to case-fold yanked strings.
(if (and isearch-case-fold-search
(eq 'not-yanks search-upper-case))
(setq string (downcase string)))
(if isearch-regexp (setq string (regexp-quote string)))
;; Don't move cursor in reverse search.
(setq isearch-yank-flag t)
(isearch-process-search-string
string (mapconcat 'isearch-text-char-description string "")))
(defun isearch-yank-kill ()
"Pull string from kill ring into search string."
(interactive)
(isearch-yank-string (current-kill 0)))
(defun isearch-yank-pop ()
"Replace just-yanked search string with previously killed string."
(interactive)
(if (not (memq last-command '(isearch-yank-kill isearch-yank-pop)))
;; Fall back on `isearch-yank-kill' for the benefits of people
;; who are used to the old behavior of `M-y' in isearch mode. In
;; future, this fallback may be changed if we ever change
;; `yank-pop' to do something like the kill-ring-browser.
(isearch-yank-kill)
(isearch-pop-state)
(isearch-yank-string (current-kill 1))))
(defun isearch-yank-x-selection ()
"Pull current X selection into search string."
(interactive)
(isearch-yank-string (gui-get-selection))
;; If `gui-get-selection' returned the text from the active region,
;; then it "used" the mark which we should hence deactivate.
(when select-active-regions (deactivate-mark)))
(defun isearch-mouse-2 (click)
"Handle mouse-2 in Isearch mode.
For a click in the echo area, invoke `isearch-yank-x-selection'.
Otherwise invoke whatever the calling mouse-2 command sequence
is bound to outside of Isearch."
(interactive "e")
(let* ((w (posn-window (event-start click)))
(overriding-terminal-local-map nil)
(binding (key-binding (this-command-keys-vector) t)))
(if (and (window-minibuffer-p w)
(not (minibuffer-window-active-p w))) ; in echo area
(isearch-yank-x-selection)
(when (functionp binding)
(call-interactively binding)))))
(defun isearch-yank-internal (jumpform)
"Pull the text from point to the point reached by JUMPFORM.
JUMPFORM is a lambda expression that takes no arguments and returns
a buffer position, possibly having moved point to that position.
For example, it might move point forward by a word and return point,
or it might return the position of the end of the line."
(isearch-yank-string
(save-excursion
(and (not isearch-forward) isearch-other-end
(goto-char isearch-other-end))
(buffer-substring-no-properties (point) (funcall jumpform)))))
(defun isearch-yank-char-in-minibuffer (&optional arg)
"Pull next character from buffer into end of search string in minibuffer."
(interactive "p")
(if (eobp)
(insert
(with-current-buffer (cadr (buffer-list))
(buffer-substring-no-properties
(point) (progn (forward-char arg) (point)))))
(forward-char arg)))
(defun isearch-yank-char (&optional arg)
"Pull next character from buffer into search string.
If optional ARG is non-nil, pull in the next ARG characters."
(interactive "p")
(isearch-yank-internal (lambda () (forward-char arg) (point))))
(declare-function subword-forward "subword" (&optional arg))
(defun isearch-yank-word-or-char ()
"Pull next character, subword or word from buffer into search string.
Subword is used when `subword-mode' is activated. "
(interactive)
(isearch-yank-internal
(lambda ()
(if (or (= (char-syntax (or (char-after) 0)) ?w)
(= (char-syntax (or (char-after (1+ (point))) 0)) ?w))
(if (or (and (boundp 'subword-mode) subword-mode)
(and (boundp 'superword-mode) superword-mode))
(subword-forward 1)
(forward-word 1))
(forward-char 1))
(point))))
(defun isearch-yank-word (&optional arg)
"Pull next word from buffer into search string.
If optional ARG is non-nil, pull in the next ARG words."
(interactive "p")
(isearch-yank-internal (lambda () (forward-word arg) (point))))
(defun isearch-yank-line (&optional arg)
"Pull rest of line from buffer into search string.
If optional ARG is non-nil, yank the next ARG lines."
(interactive "p")
(isearch-yank-internal
(lambda () (let ((inhibit-field-text-motion t))
(line-end-position (if (eolp) (1+ arg) arg))))))
(defun isearch-char-by-name (&optional count)
"Read a character by its Unicode name and add it to the search string.
Completion is available like in `read-char-by-name' used by `insert-char'.
With argument, add COUNT copies of the character."
(interactive "p")
(with-isearch-suspended
(let ((char (read-char-by-name "Add character to search (Unicode name or hex): ")))
(when char
(let ((string (if (and (integerp count) (> count 1))
(make-string count char)
(char-to-string char))))
(setq isearch-new-string (concat isearch-string string)
isearch-new-message (concat isearch-message
(mapconcat 'isearch-text-char-description
string ""))))))))
(defun isearch-search-and-update ()
;; Do the search and update the display.
(when (or isearch-success
;; Unsuccessful regexp search may become successful by
;; addition of characters which make isearch-string valid
isearch-regexp
;; If the string was found but was completely invisible,
;; it might now be partly visible, so try again.
(prog1 isearch-hidden (setq isearch-hidden nil)))
;; In reverse search, adding stuff at
;; the end may cause zero or many more chars to be
;; matched, in the string following point.
;; Allow all those possibilities without moving point as
;; long as the match does not extend past search origin.
(if (and (not isearch-forward) (not isearch-adjusted)
(condition-case ()
(let ((case-fold-search isearch-case-fold-search))
(if (and (eq case-fold-search t) search-upper-case)
(setq case-fold-search
(isearch-no-upper-case-p isearch-string isearch-regexp)))
(looking-at (cond
((functionp isearch-regexp-function)
(funcall isearch-regexp-function isearch-string t))
(isearch-regexp-function (word-search-regexp isearch-string t))
(isearch-regexp isearch-string)
(t (regexp-quote isearch-string)))))
(error nil))
(or isearch-yank-flag
(<= (match-end 0)
(min isearch-opoint isearch-barrier))))
(progn
(setq isearch-success t
isearch-error nil
isearch-other-end (match-end 0))
(if (and (eq isearch-case-fold-search t) search-upper-case)
(setq isearch-case-fold-search
(isearch-no-upper-case-p isearch-string isearch-regexp))))
;; Not regexp, not reverse, or no match at point.
(if (and isearch-other-end (not isearch-adjusted))
(goto-char (if isearch-forward isearch-other-end
(min isearch-opoint
isearch-barrier
(1+ isearch-other-end)))))
(isearch-search)
))
(isearch-push-state)
(if isearch-op-fun (funcall isearch-op-fun))
(isearch-update))
;; *, ?, }, and | chars can make a regexp more liberal.
;; They can make a regexp match sooner or make it succeed instead of failing.
;; So go back to place last successful search started
;; or to the last ^S/^R (barrier), whichever is nearer.
;; + needs no special handling because the string must match at least once.
(defun isearch-backslash (str)
"Return t if STR ends in an odd number of backslashes."
(= (mod (- (length str) (string-match "\\\\*\\'" str)) 2) 1))
(defun isearch-fallback (want-backslash &optional allow-invalid to-barrier)
"Return point to previous successful match to allow regexp liberalization.
\\<isearch-mode-map>
Respects \\[isearch-repeat-forward] and \\[isearch-repeat-backward] by \
stopping at `isearch-barrier' as needed.
Do nothing if a backslash is escaping the liberalizing character.
If WANT-BACKSLASH is non-nil, invert this behavior (for \\} and \\|).
Do nothing if regexp has recently been invalid unless optional
ALLOW-INVALID non-nil.
If optional TO-BARRIER non-nil, ignore previous matches and go exactly
to the barrier."
;; (eq (not a) (not b)) makes all non-nil values equivalent
(when (and isearch-regexp (eq (not (isearch-backslash isearch-string))
(not want-backslash))
;; We have to check 2 stack frames because the last might be
;; invalid just because of a backslash.
(or (not isearch-error)
(not (isearch--state-error (cadr isearch-cmds)))
allow-invalid))
(if to-barrier
(progn (goto-char isearch-barrier)
(setq isearch-adjusted t))
(let* ((stack isearch-cmds)
(previous (cdr stack)) ; lookbelow in the stack
(frame (car stack)))
;; Walk down the stack looking for a valid regexp (as of course only
;; they can be the previous successful match); this conveniently
;; removes all bracket-sets and groups that might be in the way, as
;; well as partial \{\} constructs that the code below leaves behind.
;; Also skip over postfix operators -- though horrid,
;; 'ab?\{5,6\}+\{1,2\}*' is perfectly valid.
(while (and previous
(or (isearch--state-error frame)
(let* ((string (isearch--state-string frame))
(lchar (aref string (1- (length string)))))
;; The operators aren't always operators; check
;; backslashes. This doesn't handle the case of
;; operators at the beginning of the regexp not
;; being special, but then we should fall back to
;; the barrier anyway because it's all optional.
(if (isearch-backslash
(isearch--state-string (car previous)))
(eq lchar ?\})
(memq lchar '(?* ?? ?+))))))
(setq stack previous previous (cdr previous) frame (car stack)))
(when stack
;; `stack' now refers the most recent valid regexp that is not at
;; all optional in its last term. Now dig one level deeper and find
;; what matched before that.
(let ((last-other-end
(or (and (car previous)
(isearch--state-other-end (car previous)))
isearch-barrier)))
(goto-char (if isearch-forward
(max last-other-end isearch-barrier)
(min last-other-end isearch-barrier)))
(setq isearch-adjusted t)))))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; scrolling within Isearch mode. Alan Mackenzie (acm@muc.de), 2003/2/24
;;
;; The idea here is that certain vertical scrolling commands (like C-l
;; `recenter') should be usable WITHIN Isearch mode. For a command to be
;; suitable, it must NOT alter the buffer, swap to another buffer or frame,
;; tamper with isearch's state, or move point. It is unacceptable for the
;; search string to be scrolled out of the current window. If a command
;; attempts this, we scroll the text back again.
;;
;; We implement this feature with a property called `isearch-scroll'.
;; If a command's symbol has the value t for this property or for the
;; `scroll-command' property, it is a scrolling command. The feature
;; needs to be enabled by setting the customizable variable
;; `isearch-allow-scroll' to a non-nil value.
;;
;; The universal argument commands (e.g. C-u) in simple.el are marked
;; as scrolling commands, and isearch.el has been amended to allow
;; prefix arguments to be passed through to scrolling commands. Thus
;; M-0 C-l will scroll point to the top of the window.
;;
;; Horizontal scrolling commands are currently not catered for.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Set the isearch-scroll property on some standard functions:
;; Scroll-bar functions:
(if (fboundp 'scroll-bar-toolkit-scroll)
(put 'scroll-bar-toolkit-scroll 'isearch-scroll t))
(if (fboundp 'w32-handle-scroll-bar-event)
(put 'w32-handle-scroll-bar-event 'isearch-scroll t))
;; Commands which scroll the window (some scroll commands
;; already have the `scroll-command' property on them):
(put 'recenter 'isearch-scroll t)
(put 'recenter-top-bottom 'isearch-scroll t)
(put 'reposition-window 'isearch-scroll t)
;; Commands which act on the other window
(put 'list-buffers 'isearch-scroll t)
(put 'scroll-other-window 'isearch-scroll t)
(put 'scroll-other-window-down 'isearch-scroll t)
(put 'beginning-of-buffer-other-window 'isearch-scroll t)
(put 'end-of-buffer-other-window 'isearch-scroll t)
;; Commands which change the window layout
(put 'delete-other-windows 'isearch-scroll t)
(put 'balance-windows 'isearch-scroll t)
(put 'split-window-right 'isearch-scroll t)
(put 'split-window-below 'isearch-scroll t)
(put 'enlarge-window 'isearch-scroll t)
;; Aliases for split-window-*
(put 'split-window-vertically 'isearch-scroll t)
(put 'split-window-horizontally 'isearch-scroll t)
;; Universal argument commands
(put 'universal-argument 'isearch-scroll t)
(put 'negative-argument 'isearch-scroll t)
(put 'digit-argument 'isearch-scroll t)
(defcustom isearch-allow-scroll nil
"Whether scrolling is allowed during incremental search.
If non-nil, scrolling commands can be used in Isearch mode.
However, the current match will never scroll offscreen.
If nil, scrolling commands will first cancel Isearch mode."
:type 'boolean
:group 'isearch)
(defcustom isearch-allow-prefix t
"Whether prefix arguments are allowed during incremental search.
If non-nil, entering a prefix argument will not terminate the
search. This option is ignored \(presumed t) when
`isearch-allow-scroll' is set."
:version "24.4"
:type 'boolean
:group 'isearch)
(defun isearch-string-out-of-window (isearch-point)
"Test whether the search string is currently outside of the window.
Return nil if it's completely visible, or if point is visible,
together with as much of the search string as will fit; the symbol
`above' if we need to scroll the text downwards; the symbol `below',
if upwards."
(let ((w-start (window-start))
(w-end (window-end nil t))
(w-L1 (save-excursion (move-to-window-line 1) (point)))
(w-L-1 (save-excursion (move-to-window-line -1) (point)))
start end) ; start and end of search string in buffer
(if isearch-forward
(setq end isearch-point start (or isearch-other-end isearch-point))
(setq start isearch-point end (or isearch-other-end isearch-point)))
(cond ((or (and (>= start w-start) (<= end w-end))
(if isearch-forward
(and (>= isearch-point w-L-1) (< isearch-point w-end)) ; point on Line -1
(and (>= isearch-point w-start) (< isearch-point w-L1)))) ; point on Line 0
nil)
((and (< start w-start)
(< isearch-point w-L-1))
'above)
(t 'below))))
(defun isearch-back-into-window (above isearch-point)
"Scroll the window to bring the search string back into view.
Restore point to ISEARCH-POINT in the process. ABOVE is t when the
search string is above the top of the window, nil when it is beneath
the bottom."
(let (start end)
(if isearch-forward
(setq end isearch-point start (or isearch-other-end isearch-point))
(setq start isearch-point end (or isearch-other-end isearch-point)))
(if above
(progn
(goto-char start)
(recenter 0)
(when (>= isearch-point (window-end nil t))
(goto-char isearch-point)
(recenter -1)))
(goto-char end)
(recenter -1)
(when (< isearch-point (window-start))
(goto-char isearch-point)
(recenter 0))))
(goto-char isearch-point))
(defvar isearch-pre-scroll-point nil)
(defun isearch-pre-command-hook ()
"Decide whether to exit Isearch mode before executing the command.
Don't exit Isearch if the key sequence that invoked this command
is bound in `isearch-mode-map', or if the invoked command is
a prefix argument command (when `isearch-allow-prefix' is non-nil),
or it is a scrolling command (when `isearch-allow-scroll' is non-nil).
Otherwise, exit Isearch (when `search-exit-option' is non-nil)
before the command is executed globally with terminated Isearch."
(let* ((key (this-single-command-keys))
(main-event (aref key 0)))
(cond
;; Don't exit Isearch if we're in the middle of some
;; `set-transient-map' thingy like `universal-argument--mode'.
((not (eq overriding-terminal-local-map isearch--saved-overriding-local-map)))
;; Don't exit Isearch for isearch key bindings.
((commandp (lookup-key isearch-mode-map key nil)))
;; Optionally edit the search string instead of exiting.
((eq search-exit-option 'edit)
(setq this-command 'isearch-edit-string))
;; Handle a scrolling function or prefix argument.
((or (and isearch-allow-prefix
(memq this-command '(universal-argument
digit-argument negative-argument)))
(and isearch-allow-scroll
(symbolp this-command)
(or (eq (get this-command 'isearch-scroll) t)
(eq (get this-command 'scroll-command) t))))
(when isearch-allow-scroll
(setq isearch-pre-scroll-point (point))))
;; A mouse click on the isearch message starts editing the search string.
((and (eq (car-safe main-event) 'down-mouse-1)
(window-minibuffer-p (posn-window (event-start main-event))))
;; Swallow the up-event.
(read-event)
(setq this-command 'isearch-edit-string))
;; Other characters terminate the search and are then executed normally.
(search-exit-option
(isearch-done)
(isearch-clean-overlays))
;; If search-exit-option is nil, run the command without exiting Isearch.
(t
(isearch-process-search-string key key)))))
(defun isearch-post-command-hook ()
(when isearch-pre-scroll-point
(let ((ab-bel (isearch-string-out-of-window isearch-pre-scroll-point)))
(if ab-bel
(isearch-back-into-window (eq ab-bel 'above) isearch-pre-scroll-point)
(goto-char isearch-pre-scroll-point)))
(setq isearch-pre-scroll-point nil)
(isearch-update)))
(defun isearch-quote-char (&optional count)
"Quote special characters for incremental search.
With argument, add COUNT copies of the character."
(interactive "p")
(let ((char (read-quoted-char (isearch-message t))))
(unless (characterp char)
(user-error "%s is not a valid character"
(key-description (vector char))))
;; Assume character codes 0200 - 0377 stand for characters in some
;; single-byte character set, and convert them to Emacs
;; characters.
(if (and isearch-regexp isearch-regexp-lax-whitespace (= char ?\s))
(if (subregexp-context-p isearch-string (length isearch-string))
(isearch-process-search-string "[ ]" " ")
(isearch-process-search-char char count))
;; This used to assume character codes 0240 - 0377 stand for
;; characters in some single-byte character set, and converted them
;; to Emacs characters. But in 23.1 this feature is deprecated
;; in favor of inserting the corresponding Unicode characters.
;; (and enable-multibyte-characters
;; (>= char ?\200)
;; (<= char ?\377)
;; (setq char (unibyte-char-to-multibyte char)))
(isearch-process-search-char char count))))
(defun isearch-printing-char (&optional char count)
"Add this ordinary printing CHAR to the search string and search.
With argument, add COUNT copies of the character."
(interactive (list last-command-event
(prefix-numeric-value current-prefix-arg)))
(let ((char (or char last-command-event)))
(if (= char ?\S-\ )
(setq char ?\s))
(if current-input-method
(isearch-process-search-multibyte-characters char count)
(isearch-process-search-char char count))))
(defun isearch-process-search-char (char &optional count)
"Add CHAR to the search string, COUNT times.
Search is updated accordingly."
;; * and ? are special in regexps when not preceded by \.
;; } and | are special in regexps when preceded by \.
;; Nothing special for + because it matches at least once.
(cond
((memq char '(?* ??)) (isearch-fallback nil))
((eq char ?\}) (isearch-fallback t t))
((eq char ?|) (isearch-fallback t nil t)))
;; Append the char(s) to the search string,
;; update the message and re-search.
(let* ((string (if (and (integerp count) (> count 1))
(make-string count char)
(char-to-string char)))
(message (if (>= char ?\200)
string
(mapconcat 'isearch-text-char-description string ""))))
(isearch-process-search-string string message)))
(defun isearch-process-search-string (string message)
(setq isearch-string (concat isearch-string string)
isearch-message (concat isearch-message message))
(isearch-search-and-update))
\f
;; Search Ring
(defun isearch-ring-adjust1 (advance)
;; Helper for isearch-ring-adjust
(let* ((ring (if isearch-regexp regexp-search-ring search-ring))
(length (length ring))
(yank-pointer-name (if isearch-regexp
'regexp-search-ring-yank-pointer
'search-ring-yank-pointer))
(yank-pointer (eval yank-pointer-name)))
(if (zerop length)
()
(set yank-pointer-name
(setq yank-pointer
(mod (+ (or yank-pointer (if advance 0 -1))
(if advance -1 1))
length)))
(setq isearch-string (nth yank-pointer ring)
isearch-message (mapconcat 'isearch-text-char-description
isearch-string "")))))
(defun isearch-ring-adjust (advance)
;; Helper for isearch-ring-advance and isearch-ring-retreat
(isearch-ring-adjust1 advance)
(if search-ring-update
(progn
(isearch-search)
(isearch-push-state)
(isearch-update))
;; Otherwise, edit the search string instead. Note that there is
;; no need to push the search state after isearch-edit-string here
;; since isearch-edit-string already pushes its state
(isearch-edit-string)))
(defun isearch-ring-advance ()
"Advance to the next search string in the ring."
;; This could be more general to handle a prefix arg, but who would use it.
(interactive)
(isearch-ring-adjust 'advance))
(defun isearch-ring-retreat ()
"Retreat to the previous search string in the ring."
(interactive)
(isearch-ring-adjust nil))
(defun isearch-complete1 ()
;; Helper for isearch-complete and isearch-complete-edit
;; Return t if completion OK, nil if no completion exists.
(let* ((ring (if isearch-regexp regexp-search-ring search-ring))
(completion-ignore-case case-fold-search)
(completion (try-completion isearch-string ring)))
(cond
((eq completion t)
;; isearch-string stays the same
t)
((or completion ; not nil, must be a string
(= 0 (length isearch-string))) ; shouldn't have to say this
(if (equal completion isearch-string) ;; no extension?
(progn
(if completion-auto-help
(with-output-to-temp-buffer "*Isearch completions*"
(display-completion-list
(all-completions isearch-string ring))))
t)
(and completion
(setq isearch-string completion))))
(t
(message "No completion") ; waits a second if in minibuffer
nil))))
(defun isearch-complete ()
"Complete the search string from the strings on the search ring.
The completed string is then editable in the minibuffer.
If there is no completion possible, say so and continue searching."
(interactive)
(if (isearch-complete1)
(progn (setq isearch-message
(mapconcat 'isearch-text-char-description
isearch-string ""))
(isearch-edit-string))
;; else
(sit-for 1)
(isearch-update)))
(defun isearch-complete-edit ()
"Same as `isearch-complete' except in the minibuffer."
(interactive)
(setq isearch-string (field-string))
(if (isearch-complete1)
(progn
(delete-field)
(insert isearch-string))))
\f
;; Message string
(defun isearch-message (&optional c-q-hack ellipsis)
;; Generate and print the message string.
(let ((cursor-in-echo-area ellipsis)
(m isearch-message)
(fail-pos (isearch-fail-pos t)))
;; Highlight failed part
(when fail-pos
(setq m (copy-sequence m))
(add-text-properties fail-pos (length m) '(face isearch-fail) m)
;; Highlight failed trailing whitespace
(when (string-match " +$" m)
(add-text-properties (match-beginning 0) (match-end 0)
'(face trailing-whitespace) m)))
(setq m (concat
(isearch-message-prefix ellipsis isearch-nonincremental)
m
(isearch-message-suffix c-q-hack)))
(if c-q-hack m (let ((message-log-max nil)) (message "%s" m)))))
(defun isearch--describe-regexp-mode (regexp-function &optional space-before)
"Make a string for describing REGEXP-FUNCTION.
If SPACE-BEFORE is non-nil, put a space before, instead of after,
the word mode."
(when (eq regexp-function t)
(setq regexp-function #'word-search-regexp))
(let ((description
;; Don't use a description on the default search mode.
(cond ((equal regexp-function search-default-regexp-mode) "")
(regexp-function
(and (symbolp regexp-function)
(or (get regexp-function 'isearch-message-prefix)
"")))
(isearch-regexp "regexp ")
;; We're in literal mode. If the default mode is not
;; literal, then describe it.
((functionp search-default-regexp-mode) "literal "))))
(if space-before
;; Move space from the end to the beginning.
(replace-regexp-in-string "\\(.*\\) \\'" " \\1" description)
description)))
(define-obsolete-function-alias 'isearch--describe-word-mode
'isearch--describe-regexp-mode "25.1")
(defun isearch-message-prefix (&optional ellipsis nonincremental)
;; If about to search, and previous search regexp was invalid,
;; check that it still is. If it is valid now,
;; let the message we display while searching say that it is valid.
(and isearch-error ellipsis
(condition-case ()
(progn (re-search-forward isearch-string (point) t)
(setq isearch-error nil))
(error nil)))
;; If currently failing, display no ellipsis.
(or isearch-success (setq ellipsis nil))
(let ((m (concat (if isearch-success "" "failing ")
(if isearch-adjusted "pending " "")
(if (and isearch-wrapped
(not isearch-wrap-function)
(if isearch-forward
(> (point) isearch-opoint)
(< (point) isearch-opoint)))
"over")
(if isearch-wrapped "wrapped ")
(let ((prefix ""))
(advice-function-mapc
(lambda (_ props)
(let ((np (cdr (assq 'isearch-message-prefix props))))
(if np (setq prefix (concat np prefix)))))
isearch-filter-predicate)
prefix)
(isearch--describe-regexp-mode isearch-regexp-function)
(cond
(multi-isearch-file-list "multi-file ")
(multi-isearch-buffer-list "multi-buffer ")
(t ""))
(or isearch-message-prefix-add "")
(if nonincremental "search" "I-search")
(if isearch-forward "" " backward")
(if current-input-method
;; Input methods for RTL languages use RTL
;; characters for their title, and that messes
;; up the display of search text after the prompt.
(bidi-string-mark-left-to-right
(concat " [" current-input-method-title "]: "))
": ")
)))
(propertize (concat (upcase (substring m 0 1)) (substring m 1))
'face 'minibuffer-prompt)))
(defun isearch-message-suffix (&optional c-q-hack)
(concat (if c-q-hack "^Q" "")
(if isearch-error
(concat " [" isearch-error "]")
"")
(or isearch-message-suffix-add "")))
\f
;; Searching
(defvar isearch-search-fun-function 'isearch-search-fun-default
"Non-default value overrides the behavior of `isearch-search-fun-default'.
This variable's value should be a function, which will be called
with no arguments, and should return a function that takes three
arguments: STRING, BOUND, and NOERROR.
This returned function will be used by `isearch-search-string' to
search for the first occurrence of STRING or its translation.")
(defun isearch-search-fun ()
"Return the function to use for the search.
Can be changed via `isearch-search-fun-function' for special needs."
(funcall (or isearch-search-fun-function 'isearch-search-fun-default)))
(defun isearch--lax-regexp-function-p ()
"Non-nil if next regexp-function call should be lax."
(not (or isearch-nonincremental
(null (car isearch-cmds))
(eq (length isearch-string)
(length (isearch--state-string
(car isearch-cmds)))))))
(defun isearch-search-fun-default ()
"Return default functions to use for the search."
(lambda (string &optional bound noerror count)
;; Use lax versions to not fail at the end of the word while
;; the user adds and removes characters in the search string
;; (or when using nonincremental word isearch)
(let ((search-spaces-regexp (when (cond
(isearch-regexp isearch-regexp-lax-whitespace)
(t isearch-lax-whitespace))
search-whitespace-regexp)))
(funcall
(if isearch-forward #'re-search-forward #'re-search-backward)
(cond (isearch-regexp-function
(let ((lax (isearch--lax-regexp-function-p)))
(if (functionp isearch-regexp-function)
(funcall isearch-regexp-function string lax)
(word-search-regexp string lax))))
(isearch-regexp string)
(t (regexp-quote string)))
bound noerror count))))
(defun isearch-search-string (string bound noerror)
"Search for the first occurrence of STRING or its translation.
If found, move point to the end of the occurrence,
update the match data, and return point."
(let* ((func (isearch-search-fun))
(pos1 (save-excursion (funcall func string bound noerror)))
pos2)
(when (and
;; Avoid "obsolete" warnings for translation-table-for-input.
(with-no-warnings
(char-table-p translation-table-for-input))
(multibyte-string-p string)
;; Minor optimization.
(string-match-p "[^[:ascii:]]" string))
(let ((translated
(apply 'string
(mapcar (lambda (c)
(or
;; Avoid "obsolete" warnings for
;; translation-table-for-input.
(with-no-warnings
(aref translation-table-for-input c))
c))
string)))
match-data)
(when translated
(save-match-data
(save-excursion
(if (setq pos2 (funcall func translated bound noerror))
(setq match-data (match-data t)))))
(when (and pos2
(or (not pos1)
(if isearch-forward (< pos2 pos1) (> pos2 pos1))))
(setq pos1 pos2)
(set-match-data match-data)))))
(when pos1
;; When using multiple buffers isearch, switch to the new buffer here,
;; because `save-excursion' above doesn't allow doing it inside funcall.
(if (and multi-isearch-next-buffer-current-function
(buffer-live-p multi-isearch-current-buffer))
(switch-to-buffer multi-isearch-current-buffer))
(goto-char pos1)
pos1)))
(defun isearch-search ()
;; Do the search with the current search string.
(if isearch-message-function
(funcall isearch-message-function nil t)
(isearch-message nil t))
(if (and (eq isearch-case-fold-search t) search-upper-case)
(setq isearch-case-fold-search
(isearch-no-upper-case-p isearch-string isearch-regexp)))
(condition-case lossage
(let ((inhibit-point-motion-hooks isearch-invisible)
(inhibit-quit nil)
(case-fold-search isearch-case-fold-search)
(search-invisible isearch-invisible)
(retry t))
(setq isearch-error nil)
(while retry
(setq isearch-success
(isearch-search-string isearch-string nil t))
;; Clear RETRY unless the search predicate says
;; to skip this search hit.
(if (or (not isearch-success)
(bobp) (eobp)
(= (match-beginning 0) (match-end 0))
(funcall isearch-filter-predicate
(match-beginning 0) (match-end 0)))
(setq retry nil)))
(setq isearch-just-started nil)
(if isearch-success
(setq isearch-other-end
(if isearch-forward (match-beginning 0) (match-end 0)))))
(quit (isearch-unread ?\C-g)
(setq isearch-success nil))
(invalid-regexp
(setq isearch-error (car (cdr lossage)))
(cond
((string-match
"\\`Premature \\|\\`Unmatched \\|\\`Invalid "
isearch-error)
(setq isearch-error "incomplete input"))
((and (not isearch-regexp)
(string-match "\\`Regular expression too big" isearch-error))
(cond
(isearch-regexp-function
(setq isearch-error "Too many words"))
((and isearch-lax-whitespace search-whitespace-regexp)
(setq isearch-error "Too many spaces for whitespace matching"))))))
(search-failed
(setq isearch-success nil)
(setq isearch-error (nth 2 lossage)))
(error
;; stack overflow in regexp search.
(setq isearch-error (format "%s" lossage))))
(if isearch-success
nil
;; Ding if failed this time after succeeding last time.
(and (isearch--state-success (car isearch-cmds))
(ding))
(if (functionp (isearch--state-pop-fun (car isearch-cmds)))
(funcall (isearch--state-pop-fun (car isearch-cmds))
(car isearch-cmds)))
(goto-char (isearch--state-point (car isearch-cmds)))))
;; Called when opening an overlay, and we are still in isearch.
(defun isearch-open-overlay-temporary (ov)
(if (not (null (overlay-get ov 'isearch-open-invisible-temporary)))
;; Some modes would want to open the overlays temporary during
;; isearch in their own way, they should set the
;; `isearch-open-invisible-temporary' to a function doing this.
(funcall (overlay-get ov 'isearch-open-invisible-temporary) ov nil)
;; Store the values for the `invisible' property, and then set it to nil.
;; This way the text hidden by this overlay becomes visible.
;; In 19.34 this does not exist so I cannot test it.
(overlay-put ov 'isearch-invisible (overlay-get ov 'invisible))
(overlay-put ov 'invisible nil)))
;; This is called at the end of isearch. It will open the overlays
;; that contain the latest match. Obviously in case of a C-g the
;; point returns to the original location which surely is not contain
;; in any of these overlays, se we are safe in this case too.
(defun isearch-open-necessary-overlays (ov)
(let ((inside-overlay (and (> (point) (overlay-start ov))
(<= (point) (overlay-end ov))))
;; If this exists it means that the overlay was opened using
;; this function, not by us tweaking the overlay properties.
(fct-temp (overlay-get ov 'isearch-open-invisible-temporary)))
(when (or inside-overlay (not fct-temp))
;; restore the values for the `invisible' properties.
(overlay-put ov 'invisible (overlay-get ov 'isearch-invisible))
(overlay-put ov 'isearch-invisible nil))
(if inside-overlay
(funcall (overlay-get ov 'isearch-open-invisible) ov)
(if fct-temp
(funcall fct-temp ov t)))))
;; This is called when exiting isearch. It closes the temporary
;; opened overlays, except the ones that contain the latest match.
(defun isearch-clean-overlays ()
(when isearch-opened-overlays
(mapc 'isearch-open-necessary-overlays isearch-opened-overlays)
(setq isearch-opened-overlays nil)))
(defun isearch-intersects-p (start0 end0 start1 end1)
"Return t if regions START0..END0 and START1..END1 intersect."
(or (and (>= start0 start1) (< start0 end1))
(and (> end0 start1) (<= end0 end1))
(and (>= start1 start0) (< start1 end0))
(and (> end1 start0) (<= end1 end0))))
;; Verify if the current match is outside of each element of
;; `isearch-opened-overlays', if so close that overlay.
(defun isearch-close-unnecessary-overlays (begin end)
(let ((overlays isearch-opened-overlays))
(setq isearch-opened-overlays nil)
(dolist (ov overlays)
(if (isearch-intersects-p begin end (overlay-start ov) (overlay-end ov))
(push ov isearch-opened-overlays)
(let ((fct-temp (overlay-get ov 'isearch-open-invisible-temporary)))
(if fct-temp
;; If this exists it means that the overlay was opened
;; using this function, not by us tweaking the overlay
;; properties.
(funcall fct-temp ov t)
(overlay-put ov 'invisible (overlay-get ov 'isearch-invisible))
(overlay-put ov 'isearch-invisible nil)))))))
(defun isearch-range-invisible (beg end)
"Return t if all the text from BEG to END is invisible."
(when (/= beg end)
;; Check that invisibility runs up to END.
(save-excursion
(goto-char beg)
(let (;; can-be-opened keeps track if we can open some overlays.
(can-be-opened (eq search-invisible 'open))
;; the list of overlays that could be opened
(crt-overlays nil))
(when (and can-be-opened isearch-hide-immediately)
(isearch-close-unnecessary-overlays beg end))
;; If the following character is currently invisible,
;; skip all characters with that same `invisible' property value.
;; Do that over and over.
(while (and (< (point) end) (invisible-p (point)))
(if (invisible-p (get-text-property (point) 'invisible))
(progn
(goto-char (next-single-property-change (point) 'invisible
nil end))
;; if text is hidden by an `invisible' text property
;; we cannot open it at all.
(setq can-be-opened nil))
(when can-be-opened
(let ((overlays (overlays-at (point)))
ov-list
o
invis-prop)
(while overlays
(setq o (car overlays)
invis-prop (overlay-get o 'invisible))
(if (invisible-p invis-prop)
(if (overlay-get o 'isearch-open-invisible)
(setq ov-list (cons o ov-list))
;; We found one overlay that cannot be
;; opened, that means the whole chunk
;; cannot be opened.
(setq can-be-opened nil)))
(setq overlays (cdr overlays)))
(if can-be-opened
;; It makes sense to append to the open
;; overlays list only if we know that this is
;; t.
(setq crt-overlays (append ov-list crt-overlays)))))
(goto-char (next-overlay-change (point)))))
;; See if invisibility reaches up thru END.
(if (>= (point) end)
(if (and can-be-opened (consp crt-overlays))
(progn
(setq isearch-opened-overlays
(append isearch-opened-overlays crt-overlays))
(mapc 'isearch-open-overlay-temporary crt-overlays)
nil)
(setq isearch-hidden t)))))))
(defun isearch-filter-visible (beg end)
"Test whether the current search hit is visible at least partially.
Return non-nil if the text from BEG to END is visible to Isearch as
determined by `isearch-range-invisible' unless invisible text can be
searched too when `search-invisible' is t."
(or (eq search-invisible t)
(not (isearch-range-invisible beg end))))
\f
;; General utilities
(defun isearch-no-upper-case-p (string regexp-flag)
"Return t if there are no upper case chars in STRING.
If REGEXP-FLAG is non-nil, disregard letters preceded by `\\' (but not `\\\\')
since they have special meaning in a regexp."
(let (quote-flag (i 0) (len (length string)) found)
(while (and (not found) (< i len))
(let ((char (aref string i)))
(if (and regexp-flag (eq char ?\\))
(setq quote-flag (not quote-flag))
(if (and (not quote-flag) (not (eq char (downcase char))))
(setq found t))
(setq quote-flag nil)))
(setq i (1+ i)))
(not (or found
;; Even if there's no uppercase char, we want to detect the use
;; of [:upper:] or [:lower:] char-class, which indicates
;; clearly that the user cares about case distinction.
(and regexp-flag (string-match "\\[:\\(upp\\|low\\)er:]" string)
(condition-case err
(progn
(string-match (substring string 0 (match-beginning 0))
"")
nil)
(invalid-regexp
(equal "Unmatched [ or [^" (cadr err)))))))))
;; Portability functions to support various Emacs versions.
(defun isearch-text-char-description (c)
(cond
((< c ?\s) (propertize
(char-to-string c)
'display (propertize (format "^%c" (+ c 64)) 'face 'escape-glyph)))
((= c ?\^?) (propertize
(char-to-string c)
'display (propertize "^?" 'face 'escape-glyph)))
(t (char-to-string c))))
;; General function to unread characters or events.
;; Also insert them in a keyboard macro being defined.
(defun isearch-unread (&rest char-or-events)
(mapc 'store-kbd-macro-event char-or-events)
(setq unread-command-events
(append char-or-events unread-command-events)))
\f
;; Highlighting
(defvar isearch-overlay nil)
(defun isearch-highlight (beg end)
(if search-highlight
(if isearch-overlay
;; Overlay already exists, just move it.
(move-overlay isearch-overlay beg end (current-buffer))
;; Overlay doesn't exist, create it.
(setq isearch-overlay (make-overlay beg end))
;; 1001 is higher than lazy's 1000 and ediff's 100+
(overlay-put isearch-overlay 'priority 1001)
(overlay-put isearch-overlay 'face isearch-face))))
(defun isearch-dehighlight ()
(when isearch-overlay
(delete-overlay isearch-overlay)))
\f
;; isearch-lazy-highlight feature
;; by Bob Glickstein <http://www.zanshin.com/~bobg/>
;; When active, *every* match for the current search string is
;; highlighted: the current one using the normal isearch match color
;; and all the others using `isearch-lazy-highlight'. The extra
;; highlighting makes it easier to anticipate where the cursor will
;; land each time you press C-s or C-r to repeat a pending search.
;; Highlighting of these additional matches happens in a deferred
;; fashion using "idle timers," so the cycles needed do not rob
;; isearch of its usual snappy response.
;; IMPLEMENTATION NOTE: This depends on some isearch internals.
;; Specifically:
;; - `isearch-update' is expected to be called (at least) every time
;; the search string or window-start changes;
;; - `isearch-string' is expected to contain the current search
;; string as entered by the user;
;; - the type of the current search is expected to be given by
;; `isearch-regexp-function' and `isearch-regexp';
;; - the direction of the current search is expected to be given by
;; `isearch-forward';
;; - the variable `isearch-error' is expected to be true
;; only if `isearch-string' is an invalid regexp.
(defvar isearch-lazy-highlight-overlays nil)
(defvar isearch-lazy-highlight-wrapped nil)
(defvar isearch-lazy-highlight-start-limit nil)
(defvar isearch-lazy-highlight-end-limit nil)
(defvar isearch-lazy-highlight-start nil)
(defvar isearch-lazy-highlight-end nil)
(defvar isearch-lazy-highlight-timer nil)
(defvar isearch-lazy-highlight-last-string nil)
(defvar isearch-lazy-highlight-window nil)
(defvar isearch-lazy-highlight-window-start nil)
(defvar isearch-lazy-highlight-window-end nil)
(defvar isearch-lazy-highlight-case-fold-search nil)
(defvar isearch-lazy-highlight-regexp nil)
(defvar isearch-lazy-highlight-lax-whitespace nil)
(defvar isearch-lazy-highlight-regexp-lax-whitespace nil)
(defvar isearch-lazy-highlight-regexp-function nil)
(define-obsolete-variable-alias 'isearch-lazy-highlight-word
'isearch-lazy-highlight-regexp-function "25.1")
(defvar isearch-lazy-highlight-forward nil)
(defvar isearch-lazy-highlight-error nil)
(defun lazy-highlight-cleanup (&optional force)
"Stop lazy highlighting and remove extra highlighting from current buffer.
FORCE non-nil means do it whether or not `lazy-highlight-cleanup'
is nil. This function is called when exiting an incremental search if
`lazy-highlight-cleanup' is non-nil."
(interactive '(t))
(if (or force lazy-highlight-cleanup)
(while isearch-lazy-highlight-overlays
(delete-overlay (car isearch-lazy-highlight-overlays))
(setq isearch-lazy-highlight-overlays
(cdr isearch-lazy-highlight-overlays))))
(when isearch-lazy-highlight-timer
(cancel-timer isearch-lazy-highlight-timer)
(setq isearch-lazy-highlight-timer nil)))
(define-obsolete-function-alias 'isearch-lazy-highlight-cleanup
'lazy-highlight-cleanup
"22.1")
(defun isearch-lazy-highlight-new-loop (&optional beg end)
"Cleanup any previous `lazy-highlight' loop and begin a new one.
BEG and END specify the bounds within which highlighting should occur.
This is called when `isearch-update' is invoked (which can cause the
search string to change or the window to scroll). It is also used
by other Emacs features."
(when (and (null executing-kbd-macro)
; (sit-for 0) ;make sure (window-start) is credible
(or (not (equal isearch-string
isearch-lazy-highlight-last-string))
(not (eq (selected-window)
isearch-lazy-highlight-window))
(not (eq isearch-lazy-highlight-case-fold-search
isearch-case-fold-search))
(not (eq isearch-lazy-highlight-regexp
isearch-regexp))
(not (eq isearch-lazy-highlight-regexp-function
isearch-regexp-function))
(not (eq isearch-lazy-highlight-lax-whitespace
isearch-lax-whitespace))
(not (eq isearch-lazy-highlight-regexp-lax-whitespace
isearch-regexp-lax-whitespace))
(not (= (window-start)
isearch-lazy-highlight-window-start))
(not (= (window-end) ; Window may have been split/joined.
isearch-lazy-highlight-window-end))
(not (eq isearch-forward
isearch-lazy-highlight-forward))
;; In case we are recovering from an error.
(not (equal isearch-error
isearch-lazy-highlight-error))))
;; something important did indeed change
(lazy-highlight-cleanup t) ;kill old loop & remove overlays
(setq isearch-lazy-highlight-error isearch-error)
;; It used to check for `(not isearch-error)' here, but actually
;; lazy-highlighting might find matches to highlight even when
;; `isearch-error' is non-nil. (Bug#9918)
(setq isearch-lazy-highlight-start-limit beg
isearch-lazy-highlight-end-limit end)
(setq isearch-lazy-highlight-window (selected-window)
isearch-lazy-highlight-window-start (window-start)
isearch-lazy-highlight-window-end (window-end)
;; Start lazy-highlighting at the beginning of the found
;; match (`isearch-other-end'). If no match, use point.
;; One of the next two variables (depending on search direction)
;; is used to define the starting position of lazy-highlighting
;; and also to remember the current position of point between
;; calls of `isearch-lazy-highlight-update', and another variable
;; is used to define where the wrapped search must stop.
isearch-lazy-highlight-start (or isearch-other-end (point))
isearch-lazy-highlight-end (or isearch-other-end (point))
isearch-lazy-highlight-wrapped nil
isearch-lazy-highlight-last-string isearch-string
isearch-lazy-highlight-case-fold-search isearch-case-fold-search
isearch-lazy-highlight-regexp isearch-regexp
isearch-lazy-highlight-lax-whitespace isearch-lax-whitespace
isearch-lazy-highlight-regexp-lax-whitespace isearch-regexp-lax-whitespace
isearch-lazy-highlight-regexp-function isearch-regexp-function
isearch-lazy-highlight-forward isearch-forward)
(unless (equal isearch-string "")
(setq isearch-lazy-highlight-timer
(run-with-idle-timer lazy-highlight-initial-delay nil
'isearch-lazy-highlight-update)))))
(defun isearch-lazy-highlight-search ()
"Search ahead for the next or previous match, for lazy highlighting.
Attempt to do the search exactly the way the pending Isearch would."
(condition-case nil
(let ((case-fold-search isearch-lazy-highlight-case-fold-search)
(isearch-regexp isearch-lazy-highlight-regexp)
(isearch-regexp-function isearch-lazy-highlight-regexp-function)
(isearch-lax-whitespace
isearch-lazy-highlight-lax-whitespace)
(isearch-regexp-lax-whitespace
isearch-lazy-highlight-regexp-lax-whitespace)
(isearch-forward isearch-lazy-highlight-forward)
(search-invisible nil) ; don't match invisible text
(retry t)
(success nil)
(bound (if isearch-lazy-highlight-forward
(min (or isearch-lazy-highlight-end-limit (point-max))
(if isearch-lazy-highlight-wrapped
(+ isearch-lazy-highlight-start
;; Extend bound to match whole string at point
(1- (length isearch-lazy-highlight-last-string)))
(window-end)))
(max (or isearch-lazy-highlight-start-limit (point-min))
(if isearch-lazy-highlight-wrapped
(- isearch-lazy-highlight-end
;; Extend bound to match whole string at point
(1- (length isearch-lazy-highlight-last-string)))
(window-start))))))
;; Use a loop like in `isearch-search'.
(while retry
(setq success (isearch-search-string
isearch-lazy-highlight-last-string bound t))
;; Clear RETRY unless the search predicate says
;; to skip this search hit.
(if (or (not success)
(= (point) bound) ; like (bobp) (eobp) in `isearch-search'.
(= (match-beginning 0) (match-end 0))
(funcall isearch-filter-predicate
(match-beginning 0) (match-end 0)))
(setq retry nil)))
success)
(error nil)))
(defun isearch-lazy-highlight-update ()
"Update highlighting of other matches for current search."
(let ((max lazy-highlight-max-at-a-time)
(looping t)
nomore)
(with-local-quit
(save-selected-window
(if (and (window-live-p isearch-lazy-highlight-window)
(not (eq (selected-window) isearch-lazy-highlight-window)))
(select-window isearch-lazy-highlight-window))
(save-excursion
(save-match-data
(goto-char (if isearch-lazy-highlight-forward
isearch-lazy-highlight-end
isearch-lazy-highlight-start))
(while looping
(let ((found (isearch-lazy-highlight-search)))
(when max
(setq max (1- max))
(if (<= max 0)
(setq looping nil)))
(if found
(let ((mb (match-beginning 0))
(me (match-end 0)))
(if (= mb me) ;zero-length match
(if isearch-lazy-highlight-forward
(if (= mb (if isearch-lazy-highlight-wrapped
isearch-lazy-highlight-start
(window-end)))
(setq found nil)
(forward-char 1))
(if (= mb (if isearch-lazy-highlight-wrapped
isearch-lazy-highlight-end
(window-start)))
(setq found nil)
(forward-char -1)))
;; non-zero-length match
(let ((ov (make-overlay mb me)))
(push ov isearch-lazy-highlight-overlays)
;; 1000 is higher than ediff's 100+,
;; but lower than isearch main overlay's 1001
(overlay-put ov 'priority 1000)
(overlay-put ov 'face lazy-highlight-face)
(overlay-put ov 'window (selected-window))))
;; Remember the current position of point for
;; the next call of `isearch-lazy-highlight-update'
;; when `lazy-highlight-max-at-a-time' is too small.
(if isearch-lazy-highlight-forward
(setq isearch-lazy-highlight-end (point))
(setq isearch-lazy-highlight-start (point)))))
;; not found or zero-length match at the search bound
(if (not found)
(if isearch-lazy-highlight-wrapped
(setq looping nil
nomore t)
(setq isearch-lazy-highlight-wrapped t)
(if isearch-lazy-highlight-forward
(progn
(setq isearch-lazy-highlight-end (window-start))
(goto-char (max (or isearch-lazy-highlight-start-limit (point-min))
(window-start))))
(setq isearch-lazy-highlight-start (window-end))
(goto-char (min (or isearch-lazy-highlight-end-limit (point-max))
(window-end))))))))
(unless nomore
(setq isearch-lazy-highlight-timer
(run-at-time lazy-highlight-interval nil
'isearch-lazy-highlight-update)))))))))
(defun isearch-resume (string regexp word forward message case-fold)
"Resume an incremental search.
STRING is the string or regexp searched for.
REGEXP non-nil means the resumed search was a regexp search.
WORD non-nil means resume a word search.
FORWARD non-nil means resume a forward search.
MESSAGE is the echo-area message recorded for the search resumed.
CASE-FOLD non-nil means the search was case-insensitive."
(isearch-mode forward regexp nil nil word)
(setq isearch-string string
isearch-message message
isearch-case-fold-search case-fold)
(isearch-search)
(isearch-update))
;;; isearch.el ends here
|