emacs-orgmode@gnu.org archives
 help / color / mirror / code / Atom feed
blob f49105e1718e5a1c9bf033d3d54becbfb52e59a7 78976 bytes (raw)
name: lisp/ol.el 	 # note: path name is non-authoritative(*)

   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
 
;;; ol.el --- Org links library                      -*- lexical-binding: t; -*-

;; Copyright (C) 2018-2022 Free Software Foundation, Inc.

;; Author: Carsten Dominik <carsten.dominik@gmail.com>
;; Keywords: outlines, hypermedia, calendar, wp

;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;; This library provides tooling to handle both external and internal
;; links.

;;; Code:

(require 'org-compat)
(require 'org-macs)
(require 'org-fold)

(defvar clean-buffer-list-kill-buffer-names)
(defvar org-agenda-buffer-name)
(defvar org-comment-string)
(defvar org-highlight-links)
(defvar org-id-link-to-org-use-id)
(defvar org-inhibit-startup)
(defvar org-outline-regexp-bol)
(defvar org-src-source-file-name)
(defvar org-time-stamp-formats)
(defvar org-ts-regexp)

(declare-function calendar-cursor-to-date "calendar" (&optional error event))
(declare-function dired-get-filename "dired" (&optional localp no-error-if-not-filep))
(declare-function org-at-heading-p "org" (&optional _))
(declare-function org-back-to-heading "org" (&optional invisible-ok))
(declare-function org-before-first-heading-p "org" ())
(declare-function org-do-occur "org" (regexp &optional cleanup))
(declare-function org-element-at-point "org-element" (&optional pom cached-only))
(declare-function org-element-cache-refresh "org-element" (pos))
(declare-function org-element-context "org-element" (&optional element))
(declare-function org-element-lineage "org-element" (datum &optional types with-self))
(declare-function org-element-link-parser "org-element" ())
(declare-function org-element-property "org-element" (property element))
(declare-function org-element-type "org-element" (element))
(declare-function org-element-update-syntax "org-element" ())
(declare-function org-entry-get "org" (pom property &optional inherit literal-nil))
(declare-function org-find-property "org" (property &optional value))
(declare-function org-get-heading "org" (&optional no-tags no-todo no-priority no-comment))
(declare-function org-id-find-id-file "org-id" (id))
(declare-function org-id-store-link "org-id" ())
(declare-function org-insert-heading "org" (&optional arg invisible-ok top))
(declare-function org-load-modules-maybe "org" (&optional force))
(declare-function org-mark-ring-push "org" (&optional pos buffer))
(declare-function org-mode "org" ())
(declare-function org-occur "org" (regexp &optional keep-previous callback))
(declare-function org-open-file "org" (path &optional in-emacs line search))
(declare-function org-cycle-overview "org-cycle" ())
(declare-function org-restart-font-lock "org" ())
(declare-function org-run-like-in-org-mode "org" (cmd))
(declare-function org-fold-show-context "org-fold" (&optional key))
(declare-function org-src-coderef-format "org-src" (&optional element))
(declare-function org-src-coderef-regexp "org-src" (fmt &optional label))
(declare-function org-src-edit-buffer-p "org-src" (&optional buffer))
(declare-function org-src-source-buffer "org-src" ())
(declare-function org-src-source-type "org-src" ())
(declare-function org-time-stamp-format "org" (&optional long inactive))
(declare-function outline-next-heading "outline" ())

\f
;;; Customization

(defgroup org-link nil
  "Options concerning links in Org mode."
  :tag "Org Link"
  :group 'org)

(defcustom org-link-parameters nil
  "Alist of properties that defines all the links in Org mode.

The key in each association is a string of the link type.
Subsequent optional elements make up a property list for that
type.

All properties are optional.  However, the most important ones
are, in this order, `:follow', `:export', and `:store', described
below.

`:follow'

  Function used to follow the link, when the `org-open-at-point'
  command runs on it.  It is called with two arguments: the path,
  as a string, and a universal prefix argument.

  Here, you may use `org-link-open-as-file' helper function for
  types similar to \"file\".

`:export'

  Function that accepts four arguments:
  - the path, as a string,
  - the description as a string, or nil,
  - the export back-end,
  - the export communication channel, as a plist.

  When nil, export for that type of link is delegated to the
  back-end.

`:store'

  Function responsible for storing the link.  See the function
  `org-store-link-functions' for a description of the expected
  arguments.

Additional properties provide more specific control over the
link.

`:activate-func'

  Function to run at the end of Font Lock activation.  It must
  accept four arguments:
  - the buffer position at the start of the link,
  - the buffer position at its end,
  - the path, as a string,
  - a boolean, non-nil when the link has brackets.

`:complete'

  Function that inserts a link with completion.  The function
  takes one optional prefix argument.

`:insert-description'

  String or function used as a default when prompting users for a
  link's description.  A string is used as-is, a function is
  called with two arguments: the full link text, and the
  description generated by `org-insert-link'.  It should return
  the description to use (this reflects the behaviour of
  `org-link-make-description-function').  If it returns nil, no
  default description is used, but no error is thrown (from the
  user's perspective, this is equivalent to a default description
  of \"\").

`:display'

  Value for `invisible' text property on the hidden parts of the
  link.  The most useful value is `full', which will not fold the
  link in descriptive display.  Default is `org-link'.

`:face'

  Face for the link, or a function returning a face.  The
  function takes one argument, which is the path.

  The default face is `org-link'.

`:help-echo'

  String or function used as a value for the `help-echo' text
  property.  The function is called with one argument, the help
  string to display, and should return a string.

`:htmlize-link'

  Function or plist for the `htmlize-link' text property.  The
  function takes no argument.

  Default is (:uri \"type:path\")

`:keymap'

  Active keymap when point is on the link.  Default is
  `org-mouse-map'.

`:mouse-face'

  Face used when hovering over the link.  Default is
  `highlight'."
  :group 'org-link
  :package-version '(Org . "9.1")
  :type '(alist :tag "Link display parameters"
		:value-type plist))

(defcustom org-link-descriptive t
  "Non-nil means Org displays descriptive links.

E.g. [[https://orgmode.org][Org website]] is displayed as
\"Org Website\", hiding the link itself and just displaying its
description.  When set to nil, Org displays the full links
literally.

You can interactively set the value of this variable by calling
`org-toggle-link-display' or from the \"Org > Hyperlinks\" menu."
  :group 'org-link
  :type 'boolean
  :safe #'booleanp)

(defcustom org-link-make-description-function nil
  "Function to use for generating link descriptions from links.
This function must take two parameters: the first one is the
link, the second one is the description generated by
`org-insert-link'.  The function should return the description to
use.  If it returns nil, no default description is used, but no
error is thrown (from the user’s perspective, this is equivalent
to a default description of \"\")."
  :group 'org-link
  :type '(choice (const nil) (function))
  :safe #'null)

(defcustom org-link-file-path-type 'adaptive
  "How the path name in file links should be stored.
Valid values are:

relative  Relative to the current directory, i.e. the directory of the file
          into which the link is being inserted.
absolute  Absolute path, if possible with ~ for home directory.
noabbrev  Absolute path, no abbreviation of home directory.
adaptive  Use relative path for files in the current directory and sub-
          directories of it.  For other files, use an absolute path.

Alternatively, users may supply a custom function that takes the
full filename as an argument and returns the path."
  :group 'org-link
  :type '(choice
	  (const relative)
	  (const absolute)
	  (const noabbrev)
	  (const adaptive)
	  (function))
  :package-version '(Org . "9.5")
  :safe #'symbolp)

(defcustom org-link-abbrev-alist nil
  "Alist of link abbreviations.
The car of each element is a string, to be replaced at the start of a link.
The cdrs are replacement values, like (\"linkkey\" . REPLACE).  Abbreviated
links in Org buffers can have an optional tag after a double colon, e.g.,

     [[linkkey:tag][description]]

The `linkkey' must be a single word, starting with a letter, followed
by letters, numbers, `-' or `_'.

If REPLACE is a string, the tag will simply be appended to create the link.
If the string contains \"%s\", the tag will be inserted there.  If the string
contains \"%h\", it will cause a url-encoded version of the tag to be inserted
at that point (see the function `url-hexify-string').  If the string contains
the specifier \"%(my-function)\", then the custom function `my-function' will
be invoked: this function takes the tag as its only argument and must return
a string.

REPLACE may also be a function that will be called with the tag as the
only argument to create the link, which should be returned as a string.

See the manual for examples."
  :group 'org-link
  :type '(repeat
	  (cons (string :tag "Protocol")
		(choice
		 (string :tag "Format")
		 (function))))
  :safe (lambda (val)
	  (pcase val
	    (`(,(pred stringp) . ,(pred stringp)) t)
	    (_ nil))))

(defgroup org-link-follow nil
  "Options concerning following links in Org mode."
  :tag "Org Follow Link"
  :group 'org-link)

(defcustom org-link-translation-function nil
  "Function to translate links with different syntax to Org syntax.
This can be used to translate links created for example by the Planner
or emacs-wiki packages to Org syntax.
The function must accept two parameters, a TYPE containing the link
protocol name like \"rmail\" or \"gnus\" as a string, and the linked path,
which is everything after the link protocol.  It should return a cons
with possibly modified values of type and path.
Org contains a function for this, so if you set this variable to
`org-translate-link-from-planner', you should be able follow many
links created by planner."
  :group 'org-link-follow
  :type '(choice (const nil) (function))
  :safe #'null)

(defcustom org-link-frame-setup
  '((vm . vm-visit-folder-other-frame)
    (vm-imap . vm-visit-imap-folder-other-frame)
    (gnus . org-gnus-no-new-news)
    (file . find-file-other-window)
    (wl . wl-other-frame))
  "Setup the frame configuration for following links.
When following a link with Emacs, it may often be useful to display
this link in another window or frame.  This variable can be used to
set this up for the different types of links.
For VM, use any of
    `vm-visit-folder'
    `vm-visit-folder-other-window'
    `vm-visit-folder-other-frame'
For Gnus, use any of
    `gnus'
    `gnus-other-frame'
    `org-gnus-no-new-news'
For FILE, use any of
    `find-file'
    `find-file-other-window'
    `find-file-other-frame'
For Wanderlust use any of
    `wl'
    `wl-other-frame'
For the calendar, use the variable `calendar-setup'.
For BBDB, it is currently only possible to display the matches in
another window."
  :group 'org-link-follow
  :type '(list
	  (cons (const vm)
		(choice
		 (const vm-visit-folder)
		 (const vm-visit-folder-other-window)
		 (const vm-visit-folder-other-frame)))
	  (cons (const vm-imap)
		(choice
		 (const vm-visit-imap-folder)
		 (const vm-visit-imap-folder-other-window)
		 (const vm-visit-imap-folder-other-frame)))
	  (cons (const gnus)
		(choice
		 (const gnus)
		 (const gnus-other-frame)
		 (const org-gnus-no-new-news)))
	  (cons (const file)
		(choice
		 (const find-file)
		 (const find-file-other-window)
		 (const find-file-other-frame)))
	  (cons (const wl)
		(choice
		 (const wl)
		 (const wl-other-frame)))))

(defcustom org-link-search-must-match-exact-headline 'query-to-create
  "Non-nil means internal fuzzy links can only match headlines.

When nil, the a fuzzy link may point to a target or a named
construct in the document.  When set to the special value
`query-to-create', offer to create a new headline when none
matched.

Spaces and statistics cookies are ignored during heading searches."
  :group 'org-link-follow
  :version "24.1"
  :type '(choice
	  (const :tag "Use fuzzy text search" nil)
	  (const :tag "Match only exact headline" t)
	  (const :tag "Match exact headline or query to create it"
		 query-to-create))
  :safe #'symbolp)

(defcustom org-link-use-indirect-buffer-for-internals nil
  "Non-nil means use indirect buffer to display infile links.
Activating internal links (from one location in a file to another location
in the same file) normally just jumps to the location.  When the link is
activated with a `\\[universal-argument]' prefix (or with mouse-3), the link \
is displayed in
another window.  When this option is set, the other window actually displays
an indirect buffer clone of the current buffer, to avoid any visibility
changes to the current buffer."
  :group 'org-link-follow
  :type 'boolean
  :safe #'booleanp)

(defcustom org-link-shell-confirm-function 'yes-or-no-p
  "Non-nil means ask for confirmation before executing shell links.

Shell links can be dangerous: just think about a link

     [[shell:rm -rf ~/*][Web Search]]

This link would show up in your Org document as \"Web Search\",
but really it would remove your entire home directory.
Therefore we advise against setting this variable to nil.
Just change it to `y-or-n-p' if you want to confirm with a
single keystroke rather than having to type \"yes\"."
  :group 'org-link-follow
  :type '(choice
	  (const :tag "with yes-or-no (safer)" yes-or-no-p)
	  (const :tag "with y-or-n (faster)" y-or-n-p)
	  (const :tag "no confirmation (dangerous)" nil)))

(defcustom org-link-shell-skip-confirm-regexp ""
  "Regexp to skip confirmation for shell links."
  :group 'org-link-follow
  :version "24.1"
  :type 'regexp)

(defcustom org-link-elisp-confirm-function 'yes-or-no-p
  "Non-nil means ask for confirmation before executing Emacs Lisp links.
Elisp links can be dangerous: just think about a link

     [[elisp:(shell-command \"rm -rf ~/*\")][Web Search]]

This link would show up in your Org document as \"Web Search\",
but really it would remove your entire home directory.
Therefore we advise against setting this variable to nil.
Just change it to `y-or-n-p' if you want to confirm with a
single keystroke rather than having to type \"yes\"."
  :group 'org-link-follow
  :type '(choice
	  (const :tag "with yes-or-no (safer)" yes-or-no-p)
	  (const :tag "with y-or-n (faster)" y-or-n-p)
	  (const :tag "no confirmation (dangerous)" nil)))

(defcustom org-link-elisp-skip-confirm-regexp ""
  "A regexp to skip confirmation for Elisp links."
  :group 'org-link-follow
  :version "24.1"
  :type 'regexp)

(defgroup org-link-store nil
  "Options concerning storing links in Org mode."
  :tag "Org Store Link"
  :group 'org-link)

(defcustom org-link-context-for-files t
  "Non-nil means file links from `org-store-link' contain context.
\\<org-mode-map>
A search string is added to the file name with \"::\" as separator
and used to find the context when the link is activated by the command
`org-open-at-point'.  When this option is t, the entire active region
is be placed in the search string of the file link.  If set to a
positive integer N, only the first N lines of context are stored.

Using a prefix argument to the command `org-store-link' \
\(`\\[universal-argument] \\[org-store-link]')
negates this setting for the duration of the command."
  :group 'org-link-store
  :type '(choice boolean integer)
  :safe (lambda (val) (or (booleanp val) (integerp val))))

(defcustom org-link-email-description-format "Email %c: %s"
  "Format of the description part of a link to an email or Usenet message.
The following %-escapes will be replaced by corresponding information:

%F   full \"From\" field
%f   name, taken from \"From\" field, address if no name
%T   full \"To\" field
%t   first name in \"To\" field, address if no name
%c   correspondent.  Usually \"from NAME\", but if you sent it yourself, it
     will be \"to NAME\".  See also the variable `org-from-is-user-regexp'.
%s   subject
%d   date
%m   message-id.

You may use normal field width specification between the % and the letter.
This is for example useful to limit the length of the subject.

Examples: \"%f on: %.30s\", \"Email from %f\", \"Email %c\""
  :group 'org-link-store
  :package-version '(Org . "9.3")
  :type 'string
  :safe #'stringp)

(defcustom org-link-from-user-regexp
  (let ((mail (and (org-string-nw-p user-mail-address)
		   (format "\\<%s\\>" (regexp-quote user-mail-address))))
	(name (and (org-string-nw-p user-full-name)
		   (format "\\<%s\\>" (regexp-quote user-full-name)))))
    (if (and mail name) (concat mail "\\|" name) (or mail name)))
  "Regexp matched against the \"From:\" header of an email or Usenet message.
It should match if the message is from the user him/herself."
  :group 'org-link-store
  :type 'regexp
  :safe #'stringp)

(defcustom org-link-keep-stored-after-insertion nil
  "Non-nil means keep link in list for entire session.
\\<org-mode-map>
The command `org-store-link' adds a link pointing to the current
location to an internal list.  These links accumulate during a session.
The command `org-insert-link' can be used to insert links into any
Org file (offering completion for all stored links).

When this option is nil, every link which has been inserted once using
`\\[org-insert-link]' will be removed from the list, to make completing the \
unused
links more efficient."
  :group 'org-link-store
  :type 'boolean
  :safe #'booleanp)

;;; Public variables

(defconst org-target-regexp (let ((border "[^<>\n\r \t]"))
			      (format "<<\\(%s\\|%s[^<>\n\r]*%s\\)>>"
				      border border border))
  "Regular expression matching a link target.")

(defconst org-radio-target-regexp (format "<%s>" org-target-regexp)
  "Regular expression matching a radio target.")

(defvar-local org-target-link-regexp nil
  "Regular expression matching radio targets in plain text.")

(defvar org-link-types-re nil
  "Matches a link that has a url-like prefix like \"http:\".")

(defvar org-link-angle-re nil
  "Matches link with angular brackets, spaces are allowed.")

(defvar org-link-plain-re nil
  "Matches plain link, without spaces.
Group 1 must contain the link type (i.e. https).
Group 2 must contain the link path (i.e. //example.com).
Used by `org-element-link-parser'.")

(defvar org-link-bracket-re nil
  "Matches a link in double brackets.")

(defvar org-link-any-re nil
  "Regular expression matching any link.")

(defvar-local org-link-abbrev-alist-local nil
  "Buffer-local version of `org-link-abbrev-alist', which see.
The value of this is taken from the LINK keywords.")

(defvar org-stored-links nil
  "Contains the links stored with `org-store-link'.")

(defvar org-store-link-plist nil
  "Plist with info about the most recently link created with `org-store-link'.")

(defvar org-create-file-search-functions nil
  "List of functions to construct the right search string for a file link.

These functions are called in turn with point at the location to
which the link should point.

A function in the hook should first test if it would like to
handle this file type, for example by checking the `major-mode'
or the file extension.  If it decides not to handle this file, it
should just return nil to give other functions a chance.  If it
does handle the file, it must return the search string to be used
when following the link.  The search string will be part of the
file link, given after a double colon, and `org-open-at-point'
will automatically search for it.  If special measures must be
taken to make the search successful, another function should be
added to the companion hook `org-execute-file-search-functions',
which see.

A function in this hook may also use `setq' to set the variable
`description' to provide a suggestion for the descriptive text to
be used for this link when it gets inserted into an Org buffer
with \\[org-insert-link].")

(defvar org-execute-file-search-functions nil
  "List of functions to execute a file search triggered by a link.

Functions added to this hook must accept a single argument, the
search string that was part of the file link, the part after the
double colon.  The function must first check if it would like to
handle this search, for example by checking the `major-mode' or
the file extension.  If it decides not to handle this search, it
should just return nil to give other functions a chance.  If it
does handle the search, it must return a non-nil value to keep
other functions from trying.

Each function can access the current prefix argument through the
variable `current-prefix-arg'.  Note that a single prefix is used
to force opening a link in Emacs, so it may be good to only use a
numeric or double prefix to guide the search function.

In case this is needed, a function in this hook can also restore
the window configuration before `org-open-at-point' was called using:

    (set-window-configuration org-window-config-before-follow-link)")

(defvar org-open-link-functions nil
  "Hook for functions finding a plain text link.
These functions must take a single argument, the link content.
They will be called for links that look like [[link text][description]]
when LINK TEXT does not have a protocol like \"http:\" and does not look
like a filename (e.g. \"./blue.png\").

These functions will be called *before* Org attempts to resolve the
link by doing text searches in the current buffer - so if you want a
link \"[[target]]\" to still find \"<<target>>\", your function should
handle this as a special case.

When the function does handle the link, it must return a non-nil value.
If it decides that it is not responsible for this link, it must return
nil to indicate that Org can continue with other options like
exact and fuzzy text search.")

\f
;;; Internal Variables

(defconst org-link--forbidden-chars "]\t\n\r<>"
  "Characters forbidden within a link, as a string.")

(defvar org-link--history nil
  "History for inserted links.")

(defvar org-link--insert-history nil
  "Minibuffer history for links inserted with `org-insert-link'.")

(defvar org-link--search-failed nil
  "Non-nil when last link search failed.")


(defvar-local org-link--link-folding-spec '(org-link
                                            (:global t)
                                            (:ellipsis . nil)
                                            (:isearch-open . t)
                                            (:fragile . org-link--reveal-maybe))
  "Folding spec used to hide invisible parts of links.")

(defvar-local org-link--description-folding-spec '(org-link-description
                                                   (:global t)
                                                   (:ellipsis . nil)
                                                   (:visible . t)
                                                   (:isearch-open . nil)
                                                   (:fragile . org-link--reveal-maybe))
  "Folding spec used to reveal link description.")

\f
;;; Internal Functions

(defun org-link--try-special-completion (type)
  "If there is completion support for link type TYPE, offer it."
  (let ((fun (org-link-get-parameter type :complete)))
    (if (functionp fun)
	(funcall fun)
      (read-string "Link (no completion support): " (concat type ":")))))

(defun org-link--prettify (link)
  "Return a human-readable representation of LINK.
The car of LINK must be a raw link.  The cdr of LINK must be
either a link description or nil."
  (let ((desc (or (cadr link) "<no description>")))
    (concat (format "%-45s" (substring desc 0 (min (length desc) 40)))
	    "<" (car link) ">")))

(defun org-link--decode-compound (hex)
  "Unhexify Unicode hex-chars HEX.
E.g. \"%C3%B6\" is the German o-Umlaut.  Note: this function also
decodes single byte encodings like \"%E1\" (a-acute) if not
followed by another \"%[A-F0-9]{2}\" group."
  (save-match-data
    (let* ((bytes (cdr (split-string hex "%")))
	   (ret "")
	   (eat 0)
	   (sum 0))
      (while bytes
	(let* ((val (string-to-number (pop bytes) 16))
	       (shift-xor
		(if (= 0 eat)
		    (cond
		     ((>= val 252) (cons 6 252))
		     ((>= val 248) (cons 5 248))
		     ((>= val 240) (cons 4 240))
		     ((>= val 224) (cons 3 224))
		     ((>= val 192) (cons 2 192))
		     (t (cons 0 0)))
		  (cons 6 128))))
	  (when (>= val 192) (setq eat (car shift-xor)))
	  (setq val (logxor val (cdr shift-xor)))
	  (setq sum (+ (lsh sum (car shift-xor)) val))
	  (when (> eat 0) (setq eat (- eat 1)))
	  (cond
	   ((= 0 eat)			;multi byte
	    (setq ret (concat ret (char-to-string sum)))
	    (setq sum 0))
	   ((not bytes)			; single byte(s)
	    (setq ret (org-link--decode-single-byte-sequence hex))))))
      ret)))

(defun org-link--decode-single-byte-sequence (hex)
  "Unhexify hex-encoded single byte character sequence HEX."
  (mapconcat (lambda (byte)
	       (char-to-string (string-to-number byte 16)))
	     (cdr (split-string hex "%"))
	     ""))

(defun org-link--fontify-links-to-this-file ()
  "Fontify links to the current file in `org-stored-links'."
  (let ((f (buffer-file-name)) a b)
    (setq a (mapcar (lambda(l)
		      (let ((ll (car l)))
			(when (and (string-match "^file:\\(.+\\)::" ll)
				   (equal f (expand-file-name (match-string 1 ll))))
			  ll)))
		    org-stored-links))
    (when (featurep 'org-id)
      (setq b (mapcar (lambda(l)
			(let ((ll (car l)))
			  (when (and (string-match "^id:\\(.+\\)$" ll)
				     (equal f (expand-file-name
					       (or (org-id-find-id-file
						    (match-string 1 ll)) ""))))
			    ll)))
		      org-stored-links)))
    (mapcar (lambda(l)
	      (put-text-property 0 (length l) 'face 'font-lock-comment-face l))
	    (delq nil (append a b)))))

(defun org-link--buffer-for-internals ()
  "Return buffer used for displaying the target of internal links."
  (cond
   ((not org-link-use-indirect-buffer-for-internals) (current-buffer))
   ((string-suffix-p "(Clone)" (buffer-name))
    (message "Buffer is already a clone, not making another one")
    ;; We also do not modify visibility in this case.
    (current-buffer))
   (t		   ;make a new indirect buffer for displaying the link
    (let* ((indirect-buffer-name (concat (buffer-name) "(Clone)"))
	   (indirect-buffer
	    (or (get-buffer indirect-buffer-name)
		(make-indirect-buffer (current-buffer)
				      indirect-buffer-name
				      'clone))))
      (with-current-buffer indirect-buffer (org-cycle-overview))
      indirect-buffer))))

(defun org-link--search-radio-target (target)
  "Search a radio target matching TARGET in current buffer.
White spaces are not significant."
  (let ((re (format "<<<%s>>>"
		    (mapconcat #'regexp-quote
			       (split-string target)
			       "[ \t]+\\(?:\n[ \t]*\\)?")))
	(origin (point)))
    (goto-char (point-min))
    (catch :radio-match
      (while (re-search-forward re nil t)
	(forward-char -1)
	(let ((object (org-element-context)))
	  (when (eq (org-element-type object) 'radio-target)
	    (goto-char (org-element-property :begin object))
	    (org-fold-show-context 'link-search)
	    (throw :radio-match nil))))
      (goto-char origin)
      (user-error "No match for radio target: %s" target))))

(defun org-link--context-from-region ()
  "Return context string from active region, or nil."
  (when (org-region-active-p)
    (let ((context (buffer-substring (region-beginning) (region-end))))
      (when (and (wholenump org-link-context-for-files)
		 (> org-link-context-for-files 0))
	(let ((lines (org-split-string context "\n")))
	  (setq context
		(mapconcat #'identity
			   (cl-subseq lines 0 org-link-context-for-files)
			   "\n"))))
      context)))

(defun org-link--normalize-string (string &optional context)
  "Remove ignored contents from STRING string and return it.
This function removes contiguous white spaces and statistics
cookies.  When optional argument CONTEXT is non-nil, it assumes
STRING is a context string, and also removes special search
syntax around the string."
  (let ((string
	 (org-trim
	  (replace-regexp-in-string
	   (rx (one-or-more (any " \t")))
	   " "
	   (replace-regexp-in-string
	    ;; Statistics cookie regexp.
	    (rx (seq "[" (0+ digit) (or "%" (seq "/" (0+ digit))) "]"))
	    " "
	    string)))))
    (when context
      (while (cond ((and (string-prefix-p "(" string)
			 (string-suffix-p ")" string))
		    (setq string (org-trim (substring string 1 -1))))
		   ((string-match "\\`[#*]+[ \t]*" string)
		    (setq string (substring string (match-end 0))))
		   (t nil))))
    string))

(defun org-link--reveal-maybe (region _)
  "Reveal folded link in REGION when needed.
This function is intended to be used as :fragile property of a folding
spec."
  (org-with-point-at (car region)
    (not (org-in-regexp org-link-any-re))))

\f
;;; Public API

(defun org-link-types ()
  "Return a list of known link types."
  (mapcar #'car org-link-parameters))

(defun org-link-get-parameter (type key)
  "Get TYPE link property for KEY.
TYPE is a string and KEY is a plist keyword.  See
`org-link-parameters' for supported keywords."
  (plist-get (cdr (assoc type org-link-parameters))
	     key))

(defun org-link-set-parameters (type &rest parameters)
  "Set link TYPE properties to PARAMETERS.
PARAMETERS should be keyword value pairs.  See
`org-link-parameters' for supported keys."
  (when (member type '("coderef" "custom-id" "fuzzy" "radio"))
    (error "Cannot override reserved link type: %S" type))
  (let ((data (assoc type org-link-parameters)))
    (if data (setcdr data (org-combine-plists (cdr data) parameters))
      (push (cons type parameters) org-link-parameters)
      (org-link-make-regexps)
      (when (featurep 'org-element) (org-element-update-syntax)))))

(defun org-link-make-regexps ()
  "Update the link regular expressions.
This should be called after the variable `org-link-parameters' has changed."
  (let ((types-re (regexp-opt (org-link-types) t)))
    (setq org-link-types-re
	  (concat "\\`" types-re ":")
	  org-link-angle-re
	  (format "<%s:\\([^>\n]*\\(?:\n[ \t]*[^> \t\n][^>\n]*\\)*\\)>"
		  types-re)
	  org-link-plain-re
          (let* ((non-space-bracket "[^][ \t\n()<>]")
	         (parenthesis
		  `(seq "("
		        (0+ (or (regex ,non-space-bracket)
			        (seq "("
				     (0+ (regex ,non-space-bracket))
				     ")")))
		        ")")))
	    ;; Heuristics for an URL link inspired by
	    ;; https://daringfireball.net/2010/07/improved_regex_for_matching_urls
	    (rx-to-string
	     `(seq word-start
                   ;; Link type: match group 1.
		   (regexp ,types-re)
		   ":"
                   ;; Link path: match group 2.
                   (group
		    (1+ (or (regex ,non-space-bracket)
			    ,parenthesis))
		    (or (regexp "[^[:punct:] \t\n]")
		        ?/
		        ,parenthesis)))))
          org-link-bracket-re
          (rx (seq "[["
	           ;; URI part: match group 1.
	           (group
	            (one-or-more
                     (or (not (any "[]\\"))
			 (and "\\" (zero-or-more "\\\\") (any "[]"))
			 (and (one-or-more "\\") (not (any "[]"))))))
		   "]"
		   ;; Description (optional): match group 2.
		   (opt "[" (group (+? anything)) "]")
		   "]"))
	  org-link-any-re
	  (concat "\\(" org-link-bracket-re "\\)\\|\\("
		  org-link-angle-re "\\)\\|\\("
		  org-link-plain-re "\\)"))))

(defun org-link-complete-file (&optional arg)
  "Create a file link using completion."
  (let ((file (read-file-name "File: "))
	(pwd (file-name-as-directory (expand-file-name ".")))
	(pwd1 (file-name-as-directory (abbreviate-file-name
				       (expand-file-name ".")))))
    (cond ((equal arg '(16))
	   (concat "file:"
		   (abbreviate-file-name (expand-file-name file))))
	  ((string-match
	    (concat "^" (regexp-quote pwd1) "\\(.+\\)") file)
	   (concat "file:" (match-string 1 file)))
	  ((string-match
	    (concat "^" (regexp-quote pwd) "\\(.+\\)")
	    (expand-file-name file))
	   (concat "file:"
		   (match-string 1 (expand-file-name file))))
	  (t (concat "file:" file)))))

(defun org-link-email-description (&optional fmt)
  "Return the description part of an email link.
This takes information from `org-store-link-plist' and formats it
according to FMT (default from `org-link-email-description-format')."
  (setq fmt (or fmt org-link-email-description-format))
  (let* ((p org-store-link-plist)
	 (to (plist-get p :toaddress))
	 (from (plist-get p :fromaddress))
	 (table
	  (list
	   (cons "%c" (plist-get p :fromto))
	   (cons "%F" (plist-get p :from))
	   (cons "%f" (or (plist-get p :fromname) (plist-get p :fromaddress) "?"))
	   (cons "%T" (plist-get p :to))
	   (cons "%t" (or (plist-get p :toname) (plist-get p :toaddress) "?"))
	   (cons "%s" (plist-get p :subject))
	   (cons "%d" (plist-get p :date))
	   (cons "%m" (plist-get p :message-id)))))
    (when (string-match "%c" fmt)
      ;; Check if the user wrote this message
      (if (and org-link-from-user-regexp from to
	       (save-match-data (string-match org-link-from-user-regexp from)))
	  (setq fmt (replace-match "to %t" t t fmt))
	(setq fmt (replace-match "from %f" t t fmt))))
    (org-replace-escapes fmt table)))

(defun org-link-store-props (&rest plist)
  "Store link properties.
The properties are pre-processed by extracting names, addresses
and dates."
  (let ((x (plist-get plist :from)))
    (when x
      (let ((adr (mail-extract-address-components x)))
	(setq plist (plist-put plist :fromname (car adr)))
	(setq plist (plist-put plist :fromaddress (nth 1 adr))))))
  (let ((x (plist-get plist :to)))
    (when x
      (let ((adr (mail-extract-address-components x)))
	(setq plist (plist-put plist :toname (car adr)))
	(setq plist (plist-put plist :toaddress (nth 1 adr))))))
  (let ((x (ignore-errors (date-to-time (plist-get plist :date)))))
    (when x
      (setq plist (plist-put plist :date-timestamp
			     (format-time-string
			      (org-time-stamp-format t) x)))
      (setq plist (plist-put plist :date-timestamp-inactive
			     (format-time-string
			      (org-time-stamp-format t t) x)))))
  (let ((from (plist-get plist :from))
	(to (plist-get plist :to)))
    (when (and from to org-link-from-user-regexp)
      (setq plist
	    (plist-put plist :fromto
		       (if (string-match org-link-from-user-regexp from)
			   (concat "to %t")
			 (concat "from %f"))))))
  (setq org-store-link-plist plist))

(defun org-link-add-props (&rest plist)
  "Add these properties to the link property list."
  (let (key value)
    (while plist
      (setq key (pop plist) value (pop plist))
      (setq org-store-link-plist
	    (plist-put org-store-link-plist key value)))))

(defun org-link-encode (text table)
  "Return percent escaped representation of string TEXT.
TEXT is a string with the text to escape.  TABLE is a list of
characters that should be escaped."
  (mapconcat
   (lambda (c)
     (if (memq c table)
	 (mapconcat (lambda (e) (format "%%%.2X" e))
		    (or (encode-coding-char c 'utf-8)
			(error "Unable to percent escape character: %c" c))
		    "")
       (char-to-string c)))
   text ""))

(defun org-link-decode (s)
  "Decode percent-encoded parts in string S.
E.g. \"%C3%B6\" becomes the german o-Umlaut."
  (replace-regexp-in-string "\\(%[0-9A-Za-z]\\{2\\}\\)+"
			    #'org-link--decode-compound s t t))

(defun org-link-escape (link)
  "Backslash-escape sensitive characters in string LINK."
  (replace-regexp-in-string
   (rx (seq (group (zero-or-more "\\")) (group (or string-end (any "[]")))))
   (lambda (m)
     (concat (match-string 1 m)
	     (match-string 1 m)
	     (and (/= (match-beginning 2) (match-end 2)) "\\")))
   link nil t 1))

(defun org-link-unescape (link)
  "Remove escaping backslash characters from string LINK."
  (replace-regexp-in-string
   (rx (group (one-or-more "\\")) (or string-end (any "[]")))
   (lambda (_)
     (concat (make-string (/ (- (match-end 1) (match-beginning 1)) 2) ?\\)))
   link nil t 1))

(defun org-link-make-string (link &optional description)
  "Make a bracket link, consisting of LINK and DESCRIPTION.
LINK is escaped with backslashes for inclusion in buffer."
  (let* ((zero-width-space (string ?\x200B))
	 (description
	  (and (org-string-nw-p description)
	       ;; Description cannot contain two consecutive square
	       ;; brackets, or end with a square bracket.  To prevent
	       ;; this, insert a zero width space character between
	       ;; the brackets, or at the end of the description.
	       (replace-regexp-in-string
		"\\(]\\)\\(]\\)"
		(concat "\\1" zero-width-space "\\2")
		(replace-regexp-in-string "]\\'"
					  (concat "\\&" zero-width-space)
					  (org-trim description))))))
    (if (not (org-string-nw-p link))
        (or description
            (error "Empty link"))
      (format "[[%s]%s]"
	      (org-link-escape link)
	      (if description (format "[%s]" description) "")))))

(defun org-store-link-functions ()
  "List of functions that are called to create and store a link.

The functions are defined in the `:store' property of
`org-link-parameters'.

Each function will be called in turn until one returns a non-nil
value.  Each function should check if it is responsible for
creating this link (for example by looking at the major mode).
If not, it must exit and return nil.  If yes, it should return
a non-nil value after calling `org-link-store-props' with a list
of properties and values.  Special properties are:

:type         The link prefix, like \"http\".  This must be given.
:link         The link, like \"http://www.astro.uva.nl/~dominik\".
              This is obligatory as well.
:description  Optional default description for the second pair
              of brackets in an Org mode link.  The user can still change
              this when inserting this link into an Org mode buffer.

In addition to these, any additional properties can be specified
and then used in capture templates."
  (cl-loop for link in org-link-parameters
	   with store-func
	   do (setq store-func (org-link-get-parameter (car link) :store))
	   if store-func
	   collect store-func))

(defun org-link-expand-abbrev (link)
  "Replace link abbreviations in LINK string.
Abbreviations are defined in `org-link-abbrev-alist'."
  (if (not (string-match "^\\([^:]*\\)\\(::?\\(.*\\)\\)?$" link)) link
    (let* ((key (match-string 1 link))
	   (as (or (assoc key org-link-abbrev-alist-local)
		   (assoc key org-link-abbrev-alist)))
	   (tag (and (match-end 2) (match-string 3 link)))
	   rpl)
      (if (not as)
	  link
	(setq rpl (cdr as))
	(cond
	 ((symbolp rpl) (funcall rpl tag))
	 ((string-match "%(\\([^)]+\\))" rpl)
	  (replace-match
	   (save-match-data
	     (funcall (intern-soft (match-string 1 rpl)) tag))
	   t t rpl))
	 ((string-match "%s" rpl) (replace-match (or tag "") t t rpl))
	 ((string-match "%h" rpl)
	  (replace-match (url-hexify-string (or tag "")) t t rpl))
	 (t (concat rpl tag)))))))

(defun org-link-open (link &optional arg)
  "Open a link object LINK.

ARG is an optional prefix argument.  Some link types may handle
it.  For example, it determines what application to run when
opening a \"file\" link.

Functions responsible for opening the link are either hard-coded
for internal and \"file\" links, or stored as a parameter in
`org-link-parameters', which see."
  (let ((type (org-element-property :type link))
	(path (org-element-property :path link)))
    (pcase type
      ;; Opening a "file" link requires special treatment since we
      ;; first need to integrate search option, if any.
      ("file"
       (let* ((option (org-element-property :search-option link))
	      (path (if option (concat path "::" option) path)))
	 (org-link-open-as-file path
				(pcase (org-element-property :application link)
				  ((guard arg) arg)
				  ("emacs" 'emacs)
				  ("sys" 'system)))))
      ;; Internal links.
      ((or "coderef" "custom-id" "fuzzy" "radio")
       (unless (run-hook-with-args-until-success 'org-open-link-functions path)
	 (if (not arg) (org-mark-ring-push)
	   (switch-to-buffer-other-window (org-link--buffer-for-internals)))
	 (let ((destination
		(org-with-wide-buffer
		 (if (equal type "radio")
		     (org-link--search-radio-target path)
		   (org-link-search
		    (pcase type
		      ("custom-id" (concat "#" path))
		      ("coderef" (format "(%s)" path))
		      (_ path))
		    ;; Prevent fuzzy links from matching themselves.
		    (and (equal type "fuzzy")
			 (+ 2 (org-element-property :begin link)))))
		 (point))))
	   (unless (and (<= (point-min) destination)
			(>= (point-max) destination))
	     (widen))
	   (goto-char destination))))
      (_
       ;; Look for a dedicated "follow" function in custom links.
       (let ((f (org-link-get-parameter type :follow)))
	 (when (functionp f)
	   ;; Function defined in `:follow' parameter may use a single
	   ;; argument, as it was mandatory before Org 9.4.  This is
	   ;; deprecated, but support it for now.
	   (condition-case nil
	       (funcall (org-link-get-parameter type :follow) path arg)
	     (wrong-number-of-arguments
	      (funcall (org-link-get-parameter type :follow) path)))))))))

(defun org-link-open-from-string (s &optional arg)
  "Open a link in the string S, as if it was in Org mode.
Optional argument is passed to `org-open-file' when S is
a \"file\" link."
  (interactive "sLink: \nP")
  (pcase (with-temp-buffer
	   (let ((org-inhibit-startup nil))
	     (insert s)
	     (org-mode)
	     (goto-char (point-min))
	     (org-element-link-parser)))
    (`nil (user-error "No valid link in %S" s))
    (link (org-link-open link arg))))

(defun org-link-search (s &optional avoid-pos stealth)
  "Search for a search string S.

If S starts with \"#\", it triggers a custom ID search.

If S is enclosed within parenthesis, it initiates a coderef
search.

If S is surrounded by forward slashes, it is interpreted as
a regular expression.  In Org mode files, this will create an
`org-occur' sparse tree.  In ordinary files, `occur' will be used
to list matches.  If the current buffer is in `dired-mode', grep
will be used to search in all files.

When AVOID-POS is given, ignore matches near that position.

When optional argument STEALTH is non-nil, do not modify
visibility around point, thus ignoring `org-show-context-detail'
variable.

Search is case-insensitive and ignores white spaces.  Return type
of matched result, which is either `dedicated' or `fuzzy'."
  (unless (org-string-nw-p s) (error "Invalid search string \"%s\"" s))
  (let* ((case-fold-search t)
	 (origin (point))
	 (normalized (replace-regexp-in-string "\n[ \t]*" " " s))
	 (starred (eq (string-to-char normalized) ?*))
	 (words (split-string (if starred (substring s 1) s)))
	 (s-multi-re (mapconcat #'regexp-quote words "\\(?:[ \t\n]+\\)"))
	 (s-single-re (mapconcat #'regexp-quote words "[ \t]+"))
	 type)
    (cond
     ;; Check if there are any special search functions.
     ((run-hook-with-args-until-success 'org-execute-file-search-functions s))
     ((eq (string-to-char s) ?#)
      ;; Look for a custom ID S if S starts with "#".
      (let* ((id (substring normalized 1))
	     (match (org-find-property "CUSTOM_ID" id)))
	(if match (progn (goto-char match) (setf type 'dedicated))
	  (error "No match for custom ID: %s" id))))
     ((string-match "\\`(\\(.*\\))\\'" normalized)
      ;; Look for coderef targets if S is enclosed within parenthesis.
      (let ((coderef (match-string-no-properties 1 normalized))
	    (re (substring s-single-re 1 -1)))
	(goto-char (point-min))
	(catch :coderef-match
	  (while (re-search-forward re nil t)
	    (let ((element (org-element-at-point)))
	      (when (and (memq (org-element-type element)
			       '(example-block src-block))
			 (org-match-line
			  (concat ".*?" (org-src-coderef-regexp
					 (org-src-coderef-format element)
					 coderef))))
		(setq type 'dedicated)
		(goto-char (match-beginning 2))
		(throw :coderef-match nil))))
	  (goto-char origin)
	  (error "No match for coderef: %s" coderef))))
     ((string-match "\\`/\\(.*\\)/\\'" normalized)
      ;; Look for a regular expression.
      (funcall (if (derived-mode-p 'org-mode) #'org-occur #'org-do-occur)
	       (match-string 1 s)))
     ;; From here, we handle fuzzy links.
     ;;
     ;; Look for targets, only if not in a headline search.
     ((and (not starred)
	   (let ((target (format "<<%s>>" s-multi-re)))
	     (catch :target-match
	       (goto-char (point-min))
	       (while (re-search-forward target nil t)
		 (backward-char)
		 (let ((context (org-element-context)))
		   (when (eq (org-element-type context) 'target)
		     (setq type 'dedicated)
		     (goto-char (org-element-property :begin context))
		     (throw :target-match t))))
	       nil))))
     ;; Look for elements named after S, only if not in a headline
     ;; search.
     ((and (not starred)
	   (let ((name (format "^[ \t]*#\\+NAME: +%s[ \t]*$" s-single-re)))
	     (catch :name-match
	       (goto-char (point-min))
	       (while (re-search-forward name nil t)
		 (let* ((element (org-element-at-point))
			(name (org-element-property :name element)))
		   (when (and name (equal words (split-string name)))
		     (setq type 'dedicated)
		     (beginning-of-line)
		     (throw :name-match t))))
	       nil))))
     ;; Regular text search.  Prefer headlines in Org mode buffers.
     ;; Ignore COMMENT keyword, TODO keywords, priority cookies,
     ;; statistics cookies and tags.
     ((and (derived-mode-p 'org-mode)
	   (let ((title-re
		  (format "%s.*\\(?:%s[ \t]\\)?.*%s"
			  org-outline-regexp-bol
			  org-comment-string
			  (mapconcat #'regexp-quote words ".+"))))
	     (goto-char (point-min))
	     (catch :found
	       (while (re-search-forward title-re nil t)
		 (when (equal words
			      (split-string
			       (org-link--normalize-string
				(org-get-heading t t t t))))
		   (throw :found t)))
	       nil)))
      (beginning-of-line)
      (setq type 'dedicated))
     ;; Offer to create non-existent headline depending on
     ;; `org-link-search-must-match-exact-headline'.
     ((and (derived-mode-p 'org-mode)
	   (eq org-link-search-must-match-exact-headline 'query-to-create)
	   (yes-or-no-p "No match - create this as a new heading? "))
      (goto-char (point-max))
      (unless (bolp) (newline))
      (org-insert-heading nil t t)
      (insert s "\n")
      (beginning-of-line 0))
     ;; Only headlines are looked after.  No need to process
     ;; further: throw an error.
     ((and (derived-mode-p 'org-mode)
	   (or starred org-link-search-must-match-exact-headline))
      (goto-char origin)
      (error "No match for fuzzy expression: %s" normalized))
     ;; Regular text search.
     ((catch :fuzzy-match
	(goto-char (point-min))
	(while (re-search-forward s-multi-re nil t)
	  ;; Skip match if it contains AVOID-POS or it is included in
	  ;; a link with a description but outside the description.
	  (unless (or (and avoid-pos
			   (<= (match-beginning 0) avoid-pos)
			   (> (match-end 0) avoid-pos))
		      (and (save-match-data
			     (org-in-regexp org-link-bracket-re))
			   (match-beginning 3)
			   (or (> (match-beginning 3) (point))
			       (<= (match-end 3) (point)))
			   (org-element-lineage
			    (save-match-data (org-element-context))
			    '(link) t)))
	    (goto-char (match-beginning 0))
	    (setq type 'fuzzy)
	    (throw :fuzzy-match t)))
	nil))
     ;; All failed.  Throw an error.
     (t (goto-char origin)
	(error "No match for fuzzy expression: %s" normalized)))
    ;; Disclose surroundings of match, if appropriate.
    (when (and (derived-mode-p 'org-mode) (not stealth))
      (org-fold-show-context 'link-search))
    type))

(defun org-link-heading-search-string (&optional string)
  "Make search string for the current headline or STRING.

Search string starts with an asterisk.  COMMENT keyword and
statistics cookies are removed, and contiguous spaces are packed
into a single one.

When optional argument STRING is non-nil, assume it a headline,
without any asterisk, TODO or COMMENT keyword, and without any
priority cookie or tag."
  (concat "*"
	  (org-link--normalize-string
	   (or string (org-get-heading t t t t)))))

(defun org-link-open-as-file (path arg)
  "Pretend PATH is a file name and open it.

According to \"file\"-link syntax, PATH may include additional
search options, separated from the file name with \"::\".

This function is meant to be used as a possible tool for
`:follow' property in `org-link-parameters'."
  (let* ((option (and (string-match "::\\(.*\\)\\'" path)
		      (match-string 1 path)))
	 (file-name (if (not option) path
		      (substring path 0 (match-beginning 0)))))
    (if (string-match "[*?{]" (file-name-nondirectory file-name))
	(dired file-name)
      (apply #'org-open-file
	     file-name
	     arg
	     (cond ((not option) nil)
		   ((string-match-p "\\`[0-9]+\\'" option)
		    (list (string-to-number option)))
		   (t (list nil option)))))))

(defun org-link-display-format (s)
  "Replace links in string S with their description.
If there is no description, use the link target."
  (save-match-data
    (replace-regexp-in-string
     org-link-bracket-re
     (lambda (m) (or (match-string 2 m) (match-string 1 m)))
     s nil t)))

(defun org-link-add-angle-brackets (s)
  "Wrap string S within angle brackets."
  (unless (equal (substring s 0 1) "<") (setq s (concat "<" s)))
  (unless (equal (substring s -1) ">") (setq s (concat s ">")))
  s)

\f
;;; Built-in link types

;;;; "elisp" link type
(defun org-link--open-elisp (path _)
  "Open a \"elisp\" type link.
PATH is the sexp to evaluate, as a string."
  (if (or (and (org-string-nw-p org-link-elisp-skip-confirm-regexp)
	       (string-match-p org-link-elisp-skip-confirm-regexp path))
	  (not org-link-elisp-confirm-function)
	  (funcall org-link-elisp-confirm-function
		   (format "Execute %s as Elisp? "
			   (org-add-props path nil 'face 'org-warning))))
      (message "%s => %s" path
	       (if (eq ?\( (string-to-char path))
		   (eval (read path))
		 (call-interactively (read path))))
    (user-error "Abort")))

(org-link-set-parameters "elisp" :follow #'org-link--open-elisp)

;;;; "file" link type
(org-link-set-parameters "file" :complete #'org-link-complete-file)

;;;; "help" link type
(defun org-link--open-help (path _)
  "Open a \"help\" type link.
PATH is a symbol name, as a string."
  (pcase (intern path)
    ((and (pred fboundp) function) (describe-function function))
    ((and (pred boundp) variable) (describe-variable variable))
    (name (user-error "Unknown function or variable: %s" name))))

(defun org-link--store-help ()
  "Store \"help\" type link."
  (when (eq major-mode 'help-mode)
    (let ((symbol
           (save-excursion
	     (goto-char (point-min))
             ;; In case the help is about the key-binding, store the
             ;; function instead.
             (search-forward "runs the command " (line-end-position) t)
             (read (current-buffer)))))
      (org-link-store-props :type "help"
                            :link (format "help:%s" symbol)
                            :description nil))))

(org-link-set-parameters "help"
                         :follow #'org-link--open-help
                         :store #'org-link--store-help)

;;;; "http", "https", "mailto", "ftp", and "news" link types
(dolist (scheme '("ftp" "http" "https" "mailto" "news"))
  (org-link-set-parameters scheme
			   :follow
			   (lambda (url arg)
			     (browse-url (concat scheme ":" url) arg))))

;;;; "shell" link type
(defun org-link--open-shell (path _)
  "Open a \"shell\" type link.
PATH is the command to execute, as a string."
  (if (or (and (org-string-nw-p org-link-shell-skip-confirm-regexp)
	       (string-match-p org-link-shell-skip-confirm-regexp path))
	  (not org-link-shell-confirm-function)
	  (funcall org-link-shell-confirm-function
		   (format "Execute %s in shell? "
			   (org-add-props path nil 'face 'org-warning))))
      (let ((buf (generate-new-buffer "*Org Shell Output*")))
	(message "Executing %s" path)
	(shell-command path buf)
	(when (featurep 'midnight)
	  (setq clean-buffer-list-kill-buffer-names
		(cons (buffer-name buf)
		      clean-buffer-list-kill-buffer-names))))
    (user-error "Abort")))

(org-link-set-parameters "shell" :follow #'org-link--open-shell)

\f
;;; Interactive Functions

;;;###autoload
(defun org-next-link (&optional search-backward)
  "Move forward to the next link.
If the link is in hidden text, expose it.  When SEARCH-BACKWARD
is non-nil, move backward."
  (interactive)
  (let ((pos (point))
	(search-fun (if search-backward #'re-search-backward
		      #'re-search-forward)))
    ;; Tweak initial position.  If last search failed, wrap around.
    ;; Otherwise, make sure we do not match current link.
    (cond
     ((not (and org-link--search-failed (eq this-command last-command)))
      (cond
       ((and (not search-backward) (looking-at org-link-any-re))
	(goto-char (match-end 0)))
       (search-backward
	(pcase (org-in-regexp org-link-any-re nil t)
	  (`(,beg . ,_) (goto-char beg))
	  (_ nil)))
       (t nil)))
     (search-backward
      (goto-char (point-max))
      (message "Link search wrapped back to end of buffer"))
     (t
      (goto-char (point-min))
      (message "Link search wrapped back to beginning of buffer")))
    (setq org-link--search-failed nil)
    (catch :found
      (while (funcall search-fun org-link-any-re nil t)
	(let ((context (save-excursion
			 (unless search-backward (forward-char -1))
			 (org-element-context))))
	  (pcase (org-element-lineage context '(link) t)
	    (`nil nil)
	    (link
	     (goto-char (org-element-property :begin link))
	     (when (org-invisible-p) (org-fold-show-context 'link-search))
	     (throw :found t)))))
      (goto-char pos)
      (setq org-link--search-failed t)
      (message "No further link found"))))

;;;###autoload
(defun org-previous-link ()
  "Move backward to the previous link.
If the link is in hidden text, expose it."
  (interactive)
  (org-next-link t))

(defun org-link-descriptive-ensure ()
  "Toggle the literal or descriptive display of links in current buffer if needed."
  (if org-link-descriptive
      (org-fold-core-set-folding-spec-property (car org-link--link-folding-spec) :visible nil)
    (org-fold-core-set-folding-spec-property (car org-link--link-folding-spec) :visible t)))

;;;###autoload
(defun org-toggle-link-display--overlays ()
  "Toggle the literal or descriptive display of links."
  (interactive)
  (if org-link-descriptive (remove-from-invisibility-spec '(org-link))
    (add-to-invisibility-spec '(org-link)))
  (org-restart-font-lock)
  (setq org-link-descriptive (not org-link-descriptive)))
(defun org-toggle-link-display--text-properties ()
  "Toggle the literal or descriptive display of links in current buffer."
  (interactive)
  (setq org-link-descriptive (not org-link-descriptive))
  (org-link-descriptive-ensure))
(defsubst org-toggle-link-display ()
  "Toggle the literal or descriptive display of links."
  (interactive)
  (if (eq org-fold-core-style 'text-properties)
      (org-toggle-link-display--text-properties)
    (org-toggle-link-display--overlays)))

;;;###autoload
(defun org-store-link (arg &optional interactive?)
  "Store a link to the current location.
\\<org-mode-map>
This link is added to `org-stored-links' and can later be inserted
into an Org buffer with `org-insert-link' (`\\[org-insert-link]').

For some link types, a `\\[universal-argument]' prefix ARG is interpreted.  \
A single
`\\[universal-argument]' negates `org-context-in-file-links' for file links or
`org-gnus-prefer-web-links' for links to Usenet articles.

A `\\[universal-argument] \\[universal-argument]' prefix ARG forces \
skipping storing functions that are not
part of Org core.

A `\\[universal-argument] \\[universal-argument] \\[universal-argument]' \
prefix ARG forces storing a link for each line in the
active region.

Assume the function is called interactively if INTERACTIVE? is
non-nil."
  (interactive "P\np")
  (org-load-modules-maybe)
  (if (and (equal arg '(64)) (org-region-active-p))
      (save-excursion
	(let ((end (region-end)))
	  (goto-char (region-beginning))
	  (set-mark (point))
	  (while (< (point-at-eol) end)
	    (move-end-of-line 1) (activate-mark)
	    (let (current-prefix-arg)
	      (call-interactively 'org-store-link))
	    (move-beginning-of-line 2)
	    (set-mark (point)))))
    (setq org-store-link-plist nil)
    (let (link cpltxt desc search custom-id agenda-link) ;; description
      (cond
       ;; Store a link using an external link type, if any function is
       ;; available. If more than one can generate a link from current
       ;; location, ask which one to use.
       ((and (not (equal arg '(16)))
	     (let ((results-alist nil))
	       (dolist (f (org-store-link-functions))
		 (when (funcall f)
		   ;; XXX: return value is not link's plist, so we
		   ;; store the new value before it is modified.  It
		   ;; would be cleaner to ask store link functions to
		   ;; return the plist instead.
		   (push (cons f (copy-sequence org-store-link-plist))
			 results-alist)))
	       (pcase results-alist
		 (`nil nil)
		 (`((,_ . ,_)) t)	;single choice: nothing to do
		 (`((,name . ,_) . ,_)
		  ;; Reinstate link plist associated to the chosen
		  ;; function.
		  (apply #'org-link-store-props
			 (cdr (assoc-string
			       (completing-read
                                (format "Store link with (default %s): " name)
                                (mapcar #'car results-alist)
                                nil t nil nil (symbol-name name))
			       results-alist)))
		  t))))
	(setq link (plist-get org-store-link-plist :link))
        ;; If store function actually set `:description' property, use
        ;; it, even if it is nil.  Otherwise, fallback to link value.
	(setq desc (if (plist-member org-store-link-plist :description)
                       (plist-get org-store-link-plist :description)
		     link)))

       ;; Store a link from a remote editing buffer.
       ((org-src-edit-buffer-p)
	(let ((coderef-format (org-src-coderef-format))
	      (format-link
	       (lambda (label)
		 (if org-src-source-file-name
		     (format "file:%s::(%s)" org-src-source-file-name label)
		   (format "(%s)" label)))))
	  (cond
	   ;; Code references do not exist in this type of buffer.
	   ;; Pretend we're linking from the source buffer directly.
	   ((not (memq (org-src-source-type) '(example-block src-block)))
	    (with-current-buffer (org-src-source-buffer)
	      (org-store-link arg interactive?))
	    (setq link nil))
	   ;; A code reference exists.  Use it.
	   ((save-excursion
	      (beginning-of-line)
	      (re-search-forward (org-src-coderef-regexp coderef-format)
				 (line-end-position)
				 t))
	    (setq link (funcall format-link (match-string-no-properties 3))))
	   ;; No code reference.  Create a new one then store the link
	   ;; to it, but only in the function is called interactively.
	   (interactive?
	    (end-of-line)
	    (let* ((label (read-string "Code line label: "))
		   (reference (format coderef-format label))
		   (gc (- 79 (length reference))))
	      (if (< (current-column) gc)
		  (org-move-to-column gc t)
		(insert " "))
	      (insert reference)
	      (setq link (funcall format-link label))))
	   ;; No code reference, and non-interactive call.  Don't know
	   ;; what to do.  Give up.
	   (t (setq link nil)))))

       ;; We are in the agenda, link to referenced location
       ((equal (bound-and-true-p org-agenda-buffer-name) (buffer-name))
	(let ((m (or (get-text-property (point) 'org-hd-marker)
		     (get-text-property (point) 'org-marker))))
	  (when m
	    (org-with-point-at m
	      (setq agenda-link (org-store-link nil interactive?))))))

       ((eq major-mode 'calendar-mode)
	(let ((cd (calendar-cursor-to-date)))
	  (setq link
		(format-time-string
		 (car org-time-stamp-formats)
		 (apply 'encode-time
			(list 0 0 0 (nth 1 cd) (nth 0 cd) (nth 2 cd)
			      nil nil nil))))
	  (org-link-store-props :type "calendar" :date cd)))

       ((eq major-mode 'w3-mode)
	(setq cpltxt (if (and (buffer-name)
			      (not (string-match "Untitled" (buffer-name))))
			 (buffer-name)
		       (url-view-url t))
	      link (url-view-url t))
	(org-link-store-props :type "w3" :url (url-view-url t)))

       ((eq major-mode 'image-mode)
	(setq cpltxt (concat "file:"
			     (abbreviate-file-name buffer-file-name))
	      link cpltxt)
	(org-link-store-props :type "image" :file buffer-file-name))

       ;; In dired, store a link to the file of the current line
       ((derived-mode-p 'dired-mode)
	(let ((file (dired-get-filename nil t)))
	  (setq file (if file
			 (abbreviate-file-name
			  (expand-file-name (dired-get-filename nil t)))
		       ;; otherwise, no file so use current directory.
		       default-directory))
	  (setq cpltxt (concat "file:" file)
		link cpltxt)))

       ((setq search (run-hook-with-args-until-success
		      'org-create-file-search-functions))
	(setq link (concat "file:" (abbreviate-file-name buffer-file-name)
			   "::" search))
	(setq cpltxt (or link))) ;; description

       ((and (buffer-file-name (buffer-base-buffer)) (derived-mode-p 'org-mode))
	(org-with-limited-levels
         (cond
	  ;; Store a link using the target at point.
	  ((org-in-regexp "[^<]<<\\([^<>]+\\)>>[^>]" 1)
	   (setq cpltxt
		 (concat "file:"
			 (abbreviate-file-name
			  (buffer-file-name (buffer-base-buffer)))
			 "::" (match-string 1))
		 link cpltxt))
          ;; Store a link using the CUSTOM_ID property.
          ((setq custom-id (org-entry-get nil "CUSTOM_ID"))
           (setq cpltxt
		 (concat "file:"
			 (abbreviate-file-name
			  (buffer-file-name (buffer-base-buffer)))
			 "::#" custom-id)
		 link cpltxt))
          ;; Store a link using (and perhaps creating) the ID property.
	  ((and (featurep 'org-id)
		(or (eq org-id-link-to-org-use-id t)
		    (and interactive?
			 (or (eq org-id-link-to-org-use-id 'create-if-interactive)
			     (and (eq org-id-link-to-org-use-id
				      'create-if-interactive-and-no-custom-id)
				  (not custom-id))))
		    (and org-id-link-to-org-use-id (org-entry-get nil "ID"))))
	   (setq link (condition-case nil
			  (prog1 (org-id-store-link)
			    (setq desc (or (plist-get org-store-link-plist
						      :description)
					   "")))
			(error
			 ;; Probably before first headline, link only to file.
			 (concat "file:"
				 (abbreviate-file-name
				  (buffer-file-name (buffer-base-buffer))))))))
	  (t
	   ;; Just link to current headline.
	   (setq cpltxt (concat "file:"
				(abbreviate-file-name
				 (buffer-file-name (buffer-base-buffer)))))
	   ;; Add a context search string.
	   (when (org-xor org-link-context-for-files (equal arg '(4)))
	     (let* ((element (org-element-at-point))
		    (name (org-element-property :name element))
		    (context
		     (cond
		      ((let ((region (org-link--context-from-region)))
			 (and region (org-link--normalize-string region t))))
		      (name)
		      ((org-before-first-heading-p)
		       (org-link--normalize-string (org-current-line-string) t))
		      (t (org-link-heading-search-string)))))
	       (when (org-string-nw-p context)
		 (setq cpltxt (format "%s::%s" cpltxt context))
		 (setq desc
		       (or name
			   ;; Although description is not a search
			   ;; string, use `org-link--normalize-string'
			   ;; to prettify it (contiguous white spaces)
			   ;; and remove volatile contents (statistics
			   ;; cookies).
			   (and (not (org-before-first-heading-p))
				(org-link--normalize-string
				 (org-get-heading t t t t)))
			   "NONE")))))
	   (setq link cpltxt)))))

       ((buffer-file-name (buffer-base-buffer))
	;; Just link to this file here.
	(setq cpltxt (concat "file:"
			     (abbreviate-file-name
			      (buffer-file-name (buffer-base-buffer)))))
	;; Add a context search string.
	(when (org-xor org-link-context-for-files (equal arg '(4)))
	  (let ((context (org-link--normalize-string
			  (or (org-link--context-from-region)
			      (org-current-line-string))
			  t)))
	    ;; Only use search option if there is some text.
	    (when (org-string-nw-p context)
	      (setq cpltxt (format "%s::%s" cpltxt context))
	      (setq desc "NONE"))))
	(setq link cpltxt))

       (interactive?
	(user-error "No method for storing a link from this buffer"))

       (t (setq link nil)))

      ;; We're done setting link and desc, clean up
      (when (consp link) (setq cpltxt (car link) link (cdr link)))
      (setq link (or link cpltxt)
	    desc (or desc cpltxt))
      (cond ((not desc))
	    ((equal desc "NONE") (setq desc nil))
	    (t (setq desc (org-link-display-format desc))))
      ;; Store and return the link
      (if (not (and interactive? link))
	  (or agenda-link (and link (org-link-make-string link desc)))
	(if (member (list link desc) org-stored-links)
	    (message "This link has already been stored")
	  (push (list link desc) org-stored-links)
	  (message "Stored: %s" (or desc link))
	  (when custom-id
	    (setq link (concat "file:"
			       (abbreviate-file-name
				(buffer-file-name (buffer-base-buffer)))
			       "::#" custom-id))
	    (push (list link desc) org-stored-links)))
	(car org-stored-links)))))

;;;###autoload
(defun org-insert-link (&optional complete-file link-location description)
  "Insert a link.  At the prompt, enter the link.

Completion can be used to insert any of the link protocol prefixes in use.

The history can be used to select a link previously stored with
`org-store-link'.  When the empty string is entered (i.e. if you just
press `RET' at the prompt), the link defaults to the most recently
stored link.  As `SPC' triggers completion in the minibuffer, you need to
use `M-SPC' or `C-q SPC' to force the insertion of a space character.

You will also be prompted for a description, and if one is given, it will
be displayed in the buffer instead of the link.

If there is already a link at point, this command will allow you to edit
link and description parts.

With a `\\[universal-argument]' prefix, prompts for a file to link to.  The \
file name can be
selected using completion.  The path to the file will be relative to the
current directory if the file is in the current directory or a subdirectory.
Otherwise, the link will be the absolute path as completed in the minibuffer
\(i.e. normally ~/path/to/file).  You can configure this behavior using the
option `org-link-file-path-type'.

With a `\\[universal-argument] \\[universal-argument]' prefix, enforce an \
absolute path even if the file is in
the current directory or below.

A `\\[universal-argument] \\[universal-argument] \\[universal-argument]' \
prefix negates `org-link-keep-stored-after-insertion'.

If the LINK-LOCATION parameter is non-nil, this value will be used as
the link location instead of reading one interactively.

If the DESCRIPTION parameter is non-nil, this value will be used
as the default description.  If not, and the chosen link type has
a non-nil `:insert-description' parameter, that is used to
generate a description as described in `org-link-parameters'
docstring. Otherwise, if `org-link-make-description-function' is
non-nil, this function will be called with the link target, and
the result will be the default link description.  When called
non-interactively, don't allow to edit the default description."
  (interactive "P")
  (let* ((wcf (current-window-configuration))
	 (origbuf (current-buffer))
	 (region (when (org-region-active-p)
		   (buffer-substring (region-beginning) (region-end))))
	 (remove (and region (list (region-beginning) (region-end))))
	 (desc region)
	 (link link-location)
	 (abbrevs org-link-abbrev-alist-local)
	 (all-prefixes (append (mapcar #'car abbrevs)
			       (mapcar #'car org-link-abbrev-alist)
			       (org-link-types)))
         entry auto-desc)
    (cond
     (link-location)		      ; specified by arg, just use it.
     ((org-in-regexp org-link-bracket-re 1)
      ;; We do have a link at point, and we are going to edit it.
      (setq remove (list (match-beginning 0) (match-end 0)))
      (setq desc (when (match-end 2) (match-string-no-properties 2)))
      (setq link (read-string "Link: "
			      (org-link-unescape
			       (match-string-no-properties 1)))))
     ((or (org-in-regexp org-link-angle-re)
	  (org-in-regexp org-link-plain-re))
      ;; Convert to bracket link
      (setq remove (list (match-beginning 0) (match-end 0))
	    link (read-string "Link: "
			      (org-unbracket-string "<" ">" (match-string 0)))))
     ((member complete-file '((4) (16)))
      ;; Completing read for file names.
      (setq link (org-link-complete-file complete-file)))
     (t
      ;; Read link, with completion for stored links.
      (org-link--fontify-links-to-this-file)
      (org-switch-to-buffer-other-window "*Org Links*")
      (with-current-buffer "*Org Links*"
	(erase-buffer)
	(insert "Insert a link.
Use TAB to complete link prefixes, then RET for type-specific completion support\n")
	(when org-stored-links
	  (insert "\nStored links are available with <up>/<down> or M-p/n \
\(most recent with RET):\n\n")
	  (insert (mapconcat #'org-link--prettify
			     (reverse org-stored-links)
			     "\n")))
	(goto-char (point-min)))
      (when (get-buffer-window "*Org Links*" 'visible)
        (let ((cw (selected-window)))
	  (select-window (get-buffer-window "*Org Links*" 'visible))
	  (with-current-buffer "*Org Links*" (setq truncate-lines t))
	  (unless (pos-visible-in-window-p (point-max))
	    (org-fit-window-to-buffer))
	  (and (window-live-p cw) (select-window cw))))
      (unwind-protect
	  ;; Fake a link history, containing the stored links.
	  (let ((org-link--history
		 (append (mapcar #'car org-stored-links)
			 org-link--insert-history)))
	    (setq link
		  (org-completing-read
		   "Link: "
		   (append
		    (mapcar (lambda (x) (concat x ":")) all-prefixes)
		    (mapcar #'car org-stored-links))
		   nil nil nil
		   'org-link--history
		   (caar org-stored-links)))
	    (unless (org-string-nw-p link) (user-error "No link selected"))
	    (dolist (l org-stored-links)
	      (when (equal link (cadr l))
		(setq link (car l))
		(setq auto-desc t)))
	    (when (or (member link all-prefixes)
		      (and (equal ":" (substring link -1))
			   (member (substring link 0 -1) all-prefixes)
			   (setq link (substring link 0 -1))))
	      (setq link (with-current-buffer origbuf
			   (org-link--try-special-completion link)))))
	(set-window-configuration wcf)
	(kill-buffer "*Org Links*"))
      (setq entry (assoc link org-stored-links))
      (or entry (push link org-link--insert-history))
      (setq desc (or desc (nth 1 entry)))))

    (when (funcall (if (equal complete-file '(64)) 'not 'identity)
		   (not org-link-keep-stored-after-insertion))
      (setq org-stored-links (delq (assoc link org-stored-links)
				   org-stored-links)))

    (when (and (string-match org-link-plain-re link)
	       (not (string-match org-ts-regexp link)))
      ;; URL-like link, normalize the use of angular brackets.
      (setq link (org-unbracket-string "<" ">" link)))

    ;; Check if we are linking to the current file with a search
    ;; option If yes, simplify the link by using only the search
    ;; option.
    (when (and (buffer-file-name (buffer-base-buffer))
	       (let ((case-fold-search nil))
		 (string-match "\\`file:\\(.+?\\)::" link)))
      (let ((path (match-string-no-properties 1 link))
	    (search (substring-no-properties link (match-end 0))))
	(save-match-data
	  (when (equal (file-truename (buffer-file-name (buffer-base-buffer)))
		       (file-truename path))
	    ;; We are linking to this same file, with a search option
	    (setq link search)))))

    ;; Check if we can/should use a relative path.  If yes, simplify
    ;; the link.
    (let ((case-fold-search nil))
      (when (string-match "\\`\\(file\\|docview\\):" link)
	(let* ((type (match-string-no-properties 0 link))
	       (path-start (match-end 0))
	       (search (and (string-match "::\\(.*\\)\\'" link)
			    (match-string 1 link)))
	       (path
		(if search
		    (substring-no-properties
		     link path-start (match-beginning 0))
		  (substring-no-properties link (match-end 0))))
	       (origpath path))
	  (cond
	   ((or (eq org-link-file-path-type 'absolute)
		(equal complete-file '(16)))
	    (setq path (abbreviate-file-name (expand-file-name path))))
	   ((eq org-link-file-path-type 'noabbrev)
	    (setq path (expand-file-name path)))
	   ((eq org-link-file-path-type 'relative)
	    (setq path (file-relative-name path)))
	   ((functionp org-link-file-path-type)
	    (setq path (funcall org-link-file-path-type
				(expand-file-name path))))
	   (t
	    (save-match-data
	      (if (string-match (concat "^" (regexp-quote
					     (expand-file-name
					      (file-name-as-directory
					       default-directory))))
				(expand-file-name path))
		  ;; We are linking a file with relative path name.
		  (setq path (substring (expand-file-name path)
					(match-end 0)))
		(setq path (abbreviate-file-name (expand-file-name path)))))))
	  (setq link (concat type path (and search (concat "::" search))))
	  (when (equal desc origpath)
	    (setq desc path)))))

    (unless auto-desc
      (let* ((type
              (cond
               ((string-match (rx-to-string `(: string-start (submatch (or ,@all-prefixes)) ":")) link)
                (match-string 1 link))
               ((file-name-absolute-p link) "file")
               ((string-match "\\`\\.\\.?/" link) "file")))
             (initial-input
	      (cond
	       (description)
               (desc)
               ((org-link-get-parameter type :insert-description)
                (let ((def (org-link-get-parameter type :insert-description)))
                  (condition-case nil
                      (cond
                       ((stringp def) def)
                       ((functionp def)
                        (funcall def link desc)))
                    (error
                     (message "Can't get link description from org link parameter `:insert-description': %S"
			      def)
		     (sit-for 2)
                     nil))))
	       (org-link-make-description-function
                (condition-case nil
		    (funcall org-link-make-description-function link desc)
		  (error
		   (message "Can't get link description from %S"
		            org-link-make-description-function)
		   (sit-for 2)
		   nil))))))
	(setq desc (if (called-interactively-p 'any)
		       (read-string "Description: " initial-input)
		     initial-input))))

    (unless (org-string-nw-p desc) (setq desc nil))
    (when remove (apply #'delete-region remove))
    (insert (org-link-make-string link desc))
    ;; Redisplay so as the new link has proper invisible characters.
    (sit-for 0)))

;;;###autoload
(defun org-insert-all-links (arg &optional pre post)
  "Insert all links in `org-stored-links'.
When a universal prefix, do not delete the links from `org-stored-links'.
When `ARG' is a number, insert the last N link(s).
`PRE' and `POST' are optional arguments to define a string to
prepend or to append."
  (interactive "P")
  (let ((org-link-keep-stored-after-insertion (equal arg '(4)))
	(links (copy-sequence org-stored-links))
	(pr (or pre "- "))
	(po (or post "\n"))
	(cnt 1) l)
    (if (null org-stored-links)
	(message "No link to insert")
      (while (and (or (listp arg) (>= arg cnt))
		  (setq l (if (listp arg)
			      (pop links)
			    (pop org-stored-links))))
	(setq cnt (1+ cnt))
	(insert pr)
	(org-insert-link nil (car l) (or (cadr l) "<no description>"))
	(insert po)))))

;;;###autoload
(defun org-insert-last-stored-link (arg)
  "Insert the last link stored in `org-stored-links'."
  (interactive "p")
  (org-insert-all-links arg "" "\n"))

;;;###autoload
(defun org-insert-link-global ()
  "Insert a link like Org mode does.
This command can be called in any mode to insert a link in Org syntax."
  (interactive)
  (org-load-modules-maybe)
  (org-run-like-in-org-mode 'org-insert-link))

;;;###autoload
(defun org-update-radio-target-regexp ()
  "Find all radio targets in this file and update the regular expression.
Also refresh fontification if needed."
  (interactive)
  (let ((old-regexp org-target-link-regexp)
	;; Some languages, e.g., Chinese, do not use spaces to
	;; separate words.  Also allow to surround radio targets with
	;; line-breakable characters.
	(before-re "\\(?:^\\|[^[:alnum:]]\\|\\c|\\)\\(")
	(after-re "\\)\\(?:$\\|[^[:alnum:]]\\|\\c|\\)")
	(targets
	 (org-with-wide-buffer
	  (goto-char (point-min))
	  (let (rtn)
	    (while (re-search-forward org-radio-target-regexp nil t)
	      ;; Make sure point is really within the object.
	      (backward-char)
	      (let ((obj (org-element-context)))
		(when (eq (org-element-type obj) 'radio-target)
		  (cl-pushnew (org-element-property :value obj) rtn
			      :test #'equal))))
	    rtn))))
    (setq org-target-link-regexp
	  (and targets
	       (concat before-re
		       (mapconcat
			(lambda (x)
			  (replace-regexp-in-string
			   " +" "\\s-+" (regexp-quote x) t t))
			targets
			"\\|")
		       after-re)))
    (unless (equal old-regexp org-target-link-regexp)
      ;; Clean-up cache.
      (let ((regexp (cond ((not old-regexp) org-target-link-regexp)
			  ((not org-target-link-regexp) old-regexp)
			  (t
			   (concat before-re
				   (mapconcat
				    (lambda (re)
				      (substring re (length before-re)
						 (- (length after-re))))
				    (list old-regexp org-target-link-regexp)
				    "\\|")
				   after-re)))))
	(when (and (featurep 'org-element)
                   (not (bound-and-true-p org-mode-loading)))
	  (org-with-point-at 1
	    (while (re-search-forward regexp nil t)
	      (org-element-cache-refresh (match-beginning 1))))))
      ;; Re fontify buffer.
      (when (memq 'radio org-highlight-links)
	(org-restart-font-lock)))))

\f
;;; Initialize Regexps

(org-link-make-regexps)

(provide 'ol)

;; Local variables:
;; generated-autoload-file: "org-loaddefs.el"
;; End:

;;; ol.el ends here

debug log:

solving f49105e17 ...
found f49105e17 in https://yhetil.org/orgmode/87k08bjw0t.fsf@heagren.com/
found d4bd0e40c in https://git.savannah.gnu.org/cgit/emacs/org-mode.git
preparing index
index prepared:
100644 d4bd0e40c2ffd725c8e22a05e4927fd431a74c1c	lisp/ol.el

applying [1/1] https://yhetil.org/orgmode/87k08bjw0t.fsf@heagren.com/
diff --git a/lisp/ol.el b/lisp/ol.el
index d4bd0e40c..f49105e17 100644

Checking patch lisp/ol.el...
Applied patch lisp/ol.el cleanly.

index at:
100644 f49105e1718e5a1c9bf033d3d54becbfb52e59a7	lisp/ol.el

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/emacs/org-mode.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).