Source

text-modes / htmlize.el

   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
;; htmlize.el -- Convert buffer text and decorations to HTML.

;; Copyright (C) 1997,1998,1999,2000,2001,2002,2003 Hrvoje Niksic

;; Author: Hrvoje Niksic <hniksic@xemacs.org>
;; Keywords: hypermedia, extensions

;; This program 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 2, or (at your option)
;; any later version.

;; This program 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 this program; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Commentary:

;; This package converts the buffer text and the associated
;; decorations to HTML.  Mail to <hniksic@xemacs.org> to discuss
;; features and additions.  All suggestions are more than welcome.

;; To use this, just switch to the buffer you want HTML-ized and type
;; `M-x htmlize-buffer'.  You will be switched to a new buffer that
;; contains the resulting HTML code.  You can edit and inspect this
;; buffer, or you can just save it with C-x C-w.  `M-x htmlize-file'
;; will find a file, fontify it, and save the HTML version in
;; FILE.html, without any additional intervention.  `M-x
;; htmlize-many-files' allows you to htmlize any number of files in
;; the same manner.  `M-x htmlize-many-files-dired' does the same for
;; files marked in a dired buffer.

;; htmlize supports two types of HTML output, selected by setting
;; `htmlize-output-type': `css' and `font'.  In `css' mode, htmlize
;; uses cascading style sheets to specify colors; it generates classes
;; that correspond to Emacs faces and uses <span class=FACE>...</span>
;; to color parts of text.  In this mode, the produced HTML is valid
;; under the 4.01 strict DTD, as confirmed by the W3C validator.  In
;; `font' mode, htmlize uses <font color="...">...</font> to colorize
;; HTML, which is not standard-compliant, but works better in older
;; browsers.  `css' mode is the default.

;; You can also use htmlize from your Emacs Lisp code.  When called
;; non-interactively, `htmlize-buffer' and `htmlize-region' will
;; return the resulting HTML buffer, but will not change current
;; buffer or move the point.

;; I tried to make the package elisp-compatible with multiple Emacsen,
;; specifically aiming for XEmacs 19.14+ and GNU Emacs 19.34+.  Please
;; let me know if it doesn't work on some of those, and I'll try to
;; fix it.  I relied heavily on the presence of CL extensions,
;; especially for cross-emacs compatibility; please don't try to
;; remove that particular dependency.  When byte-compiling under GNU
;; Emacs, you're likely to get lots of warnings; just ignore them.

;; The latest version should be available at:
;;
;;        <http://fly.srk.fer.hr/~hniksic/emacs/htmlize.el>
;;
;; You can find a sample of htmlize's output (possibly generated with
;; an older version) at:
;;
;;        <http://fly.srk.fer.hr/~hniksic/emacs/htmlize.el.html>

;; Thanks go to the multitudes of people who have sent reports and
;; contributed comments, suggestions, and fixes.  They include Ron
;; Gut, Bob Weiner, Toni Drabik, Peter Breton, Thomas Vogels and many
;; others.

;; User quotes: "You sir, are a sick, sick, _sick_ person. :)"
;;                  -- Bill Perry, author of Emacs/W3


;;; Code:

(require 'cl)
(eval-when-compile
  (if (string-match "XEmacs" emacs-version)
      (byte-compiler-options
	(warnings (- unresolved))))
  (defvar font-lock-auto-fontify)
  (defvar font-lock-support-mode)
  (defvar global-font-lock-mode)
  (when (and (eq emacs-major-version 19)
	     (not (string-match "XEmacs" emacs-version)))
    ;; Older versions of GNU Emacs fail to autoload cl-extra even when
    ;; `cl' is loaded.
    (load "cl-extra")))

(defconst htmlize-version "1.16")

;; Incantations to make custom stuff work without customize, e.g. on
;; XEmacs 19.14 or GNU Emacs 19.34.
(eval-and-compile
  (condition-case ()
      (require 'custom)
    (error nil))
  (if (and (featurep 'custom) (fboundp 'custom-declare-variable))
      nil				; we've got what we needed
    ;; No custom or obsolete custom, define surrogates.  Define all
    ;; three macros, so we don't hose another library that expects
    ;; e.g. `defface' to work after (fboundp 'defcustom) succeeds.
    (defmacro defgroup (&rest ignored) nil)
    (defmacro defcustom (var value doc &rest ignored)
      `(defvar ,var ,value ,doc))
    (defmacro defface (face value doc &rest stuff)
      `(make-face ,face))))

(defgroup htmlize nil
  "Convert buffer text and faces to HTML."
  :group 'hypermedia)

(defcustom htmlize-head-tags ""
  "*Additional tags to insert within HEAD of the generated document."
  :type 'string
  :group 'htmlize)

(defcustom htmlize-output-type 'css
  "*Output type of generated HTML.  Legal values are `css' and `font'.
When set to `css' (the default), htmlize will generate a style sheet
with description of faces, and use it in the HTML document, specifying
the faces in the actual text with <span class=\"FACE\">.

When set to `font', the properties will be set using layout tags
<font>, <b>, <i>, <u>, and <strike>.

`css' output is normally preferred, but `font' is still useful for
supporting old, pre-CSS browsers, or for easy embedding of colorized
text in foreign HTML documents (no style sheet to carry around)."
  :type '(choice (const css) (const font))
  :group 'htmlize)

(defcustom htmlize-generate-hyperlinks t
  "*Non-nil means generate the hyperlinks for URLs and mail addresses.
This is on by default; set it to nil if you don't want htmlize to
insert hyperlinks in the resulting HTML.  (In which case you can still
do your own hyperlinkification from htmlize-after-hook.)"
  :type 'boolean
  :group 'htmlize)

(defcustom htmlize-hyperlink-style "\
      a {
        color: inherit;
        background-color: inherit;
        font: inherit;
        text-decoration: inherit;
      }
      a:hover {
        text-decoration: underline;
      }
"
  "*The CSS style used for hyperlinks when in CSS mode."
  :type 'string
  :group 'htmlize)

(defcustom htmlize-html-charset nil
  "*The charset declared by the resulting HTML documents.
When non-nil, causes htmlize to insert the following in the HEAD section
of the generated HTML:

  <meta http-equiv=\"Content-Type\" content=\"text/html; charset=CHARSET\">

where CHARSET is the value you've set for htmlize-html-charset.  Valid
charsets are defined by MIME and include strings like \"iso-8859-1\",
\"iso-8859-15\", \"utf-8\", etc.

If you are using non-Latin-1 charsets, you might need to set this for
your documents to render correctly.  Also, the W3C validator requires
submitted HTML documents to declare a charset.  So if you care about
validation, you can use this to prevent the validator from bitching.

Needless to say, if you set this, you should actually make sure that
the buffer is in the encoding you're claiming it is in.  (Under Mule
that is done by ensuring the correct \"file coding system\" for the
buffer.)  If you don't understand what that means, this option is
probably not for you."
  :type '(choice (const :tag "Unset" nil)
		 string)
  :group 'htmlize)

(defcustom htmlize-convert-nonascii-to-entities (featurep 'mule)
  "*Whether non-ASCII characters should be converted to HTML entities.

When this is non-nil, characters with codes in the 128-255 range will be
considered Latin 1 and rewritten as \"&#CODE;\".  Characters with codes
above 255 will be converted to \"&#UCS;\", where UCS denotes the Unicode
code point of the character.  If the code point cannot be determined,
the character will be copied unchanged, as would be the case if the
option were nil.

When the option is nil, the non-ASCII characters are copied to HTML
without modification.  In that case, the web server and/or the browser
must be set to understand the encoding that was used when saving the
buffer.  (You might also want to specify it by setting
`htmlize-html-charset'.)

Note that in an HTML entity \"&#CODE;\", CODE is always a UCS code point,
which has nothing to do with the charset the page is in.  For example,
\"&#169;\" *always* refers to the copyright symbol, regardless of charset
specified by the META tag or the charset sent by the HTTP server.  In
other words, \"&#169;\" is exactly equivalent to \"&copy;\".

By default, entity conversion is turned on for Mule-enabled Emacsen and
turned off otherwise.  This is because Mule knows the charset of
non-ASCII characters in the buffer.  A non-Mule Emacs cannot tell
whether a character with code 0xA9 represents Latin 1 copyright symbol,
Latin 2 \"S with caron\", or something else altogether.  Setting this to
t without Mule means asserting that 128-255 characters always mean Latin
1.

For most people htmlize will work fine with this option left at the
default setting; don't change it unless you know what you're doing."
  :type 'sexp
  :group 'htmlize)

(defcustom htmlize-css-name-prefix ""
  "*The prefix used for CSS names.
The CSS names that htmlize generates from face names are often too
generic for CSS files; for example, `font-lock-type-face' is transformed
to `type'.  Use this variable to add a prefix to the generated names.
The string \"htmlize-\" is an example of a reasonable prefix."
  :type 'string
  :group 'htmlize)

(defcustom htmlize-use-rgb-txt t
  "*Whether `rgb.txt' should be used to convert color names to RGB.

This conversion means determining, for instance, that the color
\"IndianRed\" corresponds to the (205, 92, 92) RGB triple.  `rgb.txt'
is the X color database that maps hundreds of color names to such RGB
triples.  When this variable is non-nil, `htmlize' uses `rgb.txt' to
look up color names.

If this variable is nil, htmlize queries Emacs for RGB components of
colors using `color-instance-rgb-components' and `x-color-values'.
This can yield incorrect results on non-true-color displays.

If the `rgb.txt' file is not found (which will be the case if you're
running Emacs on non-X11 systems), this option is ignored."
  :type 'boolean
  :group 'htmlize)

(defcustom htmlize-html-major-mode nil
  "The mode the newly created HTML buffer will be put in.
Set this to nil if you prefer the default (fundamental) mode."
  :type '(radio (const :tag "No mode (fundamental)" nil)
		 (function-item html-mode)
		 (function :tag "User-defined major mode"))
  :group 'htmlize)

(defvar htmlize-before-hook nil
  "Hook run before htmlizing a buffer.
The hook functions are run in the source buffer (not the resulting HTML
buffer).")

(defvar htmlize-after-hook nil
  "Hook run after htmlizing a buffer.
Unlike `htmlize-before-hook', these functions are run in the generated
HTML buffer.  You may use them to modify the outlook of the final HTML
output.")

(defvar htmlize-file-hook nil
  "Hook run by `htmlize-file' after htmlizing a file, but before saving it.")

;;; Some cross-Emacs compatibility.

;; I try to conditionalize on features rather than Emacs version, but
;; in some cases checking against the version *is* necessary.
(defconst htmlize-running-xemacs (string-match "XEmacs" emacs-version))

(eval-and-compile
  ;; save-current-buffer, with-current-buffer, and with-temp-buffer
  ;; are not available in 19.34 and in older XEmacsen.  Strictly
  ;; speaking, we should stick to our own namespace and define and use
  ;; htmlize-save-current-buffer, etc.  But non-standard special forms
  ;; are a pain because they're not properly fontified or indented and
  ;; because they look weird and ugly.  So I'll just go ahead and
  ;; define the real ones if they're not available.  If someone
  ;; convinces me that this breaks something, I'll switch to the
  ;; "htmlize-" namespace.
  (unless (fboundp 'save-current-buffer)
    (defmacro save-current-buffer (&rest forms)
      `(let ((__scb_current (current-buffer)))
	 (unwind-protect
	     (progn ,@forms)
	   (set-buffer __scb_current)))))
  (unless (fboundp 'with-current-buffer)
    (defmacro with-current-buffer (buffer &rest forms)
      `(save-current-buffer (set-buffer ,buffer) ,@forms)))
  (unless (fboundp 'with-temp-buffer)
    (defmacro with-temp-buffer (&rest forms)
      (let ((temp-buffer (gensym "tb-")))
	`(let ((,temp-buffer
		(get-buffer-create (generate-new-buffer-name " *temp*"))))
	   (unwind-protect
	       (with-current-buffer ,temp-buffer
		 ,@forms)
	     (and (buffer-live-p ,temp-buffer)
		  (kill-buffer ,temp-buffer))))))))

;; We need a function that efficiently finds the next change of a
;; property (usually `face'), preferably regardless of whether the
;; change occurred because of a text property or an extent/overlay.
;; As it turns out, it is not easy to do that compatibly.
;;
;; Under XEmacs, `next-single-property-change' does that.  Under GNU
;; Emacs beginning with version 21, `next-single-char-property-change'
;; is available and does the same.  GNU Emacs 20 had
;; `next-char-property-change', which we can use.  GNU Emacs 19 didn't
;; provide any means for simultaneously examining overlays and text
;; properties, so when using Emacs 19.34, we punt and fall back to
;; `next-single-property-change', thus ignoring overlays altogether.

(cond
 (htmlize-running-xemacs
  ;; XEmacs: good.
  (defun htmlize-next-change (pos prop &optional limit)
    (next-single-property-change pos prop nil (or limit (point-max)))))
 ((fboundp 'next-single-char-property-change)
  ;; GNU Emacs 21: good.
  (defun htmlize-next-change (pos prop &optional limit)
    (next-single-char-property-change pos prop nil limit)))
 ((fboundp 'next-char-property-change)
  ;; GNU Emacs 20: bad, but fixable.
  (defun htmlize-next-change (pos prop &optional limit)
    (let ((done nil)
	  (current-value (get-char-property pos prop))
	  newpos next-value)
      ;; Loop over positions returned by next-char-property-change
      ;; until the value of PROP changes or we've hit EOB.
      (while (not done)
	(setq newpos (next-char-property-change pos limit)
	      next-value (get-char-property newpos prop))
	(cond ((eq newpos pos)
	       ;; Possibly at EOB?  Whatever, just don't infloop.
	       (setq done t))
	      ((eq next-value current-value)
	       ;; PROP hasn't changed -- keep looping.
	       )
	      (t
	       (setq done t)))
	(setq pos newpos))
      pos)))
 (t
  ;; GNU Emacs 19.34: hopeless, cannot properly support overlays.
  (defun htmlize-next-change (pos prop &optional limit)
    (unless limit
      (setq limit (point-max)))
    (let ((res (next-single-property-change pos prop)))
      (if (or (null res)
	      (> res limit))
	  limit
	res)))))

;;; Transformation of buffer text: HTML escapes, untabification, etc.

(defvar htmlize-basic-character-table
  ;; Map characters in the 0-127 range to either one-character strings
  ;; or to numeric entities.
  (let ((table (make-vector 128 ?\0)))
    ;; Map characters in the 32-126 range to themselves, others to
    ;; &#CODE entities;
    (dotimes (i 128)
      (setf (aref table i) (if (and (>= i 32) (<= i 126))
			       (char-to-string i)
			     (format "&#%d;" i))))
    ;; Set exceptions manually.
    (setf
     ;; Don't escape newline, carriage return, and TAB.
     (aref table ?\n) "\n"
     (aref table ?\r) "\r"
     (aref table ?\t) "\t"
     ;; Escape &, <, and >.
     (aref table ?&) "&amp;"
     (aref table ?<) "&lt;"
     (aref table ?>) "&gt;"
     ;; Not escaping '"' buys us a measurable speedup.  It's only
     ;; necessary to quote it for strings used in attribute values,
     ;; which htmlize doesn't do.
     ;(aref table ?\") "&quot;"
     )
    table))

;; A cache of HTML representation of non-ASCII characters.  Depending
;; on availability of `encode-char' and the setting of
;; `htmlize-convert-nonascii-to-entities', this maps non-ASCII
;; characters to either "&#<code>;" or "<char>" (mapconcat's mapper
;; must always return strings).  It's only filled as characters are
;; encountered, so that in a buffer with e.g. French text, it will
;; only ever contain French accented characters as keys.  It's cleared
;; on each entry to htmlize-buffer-1 to allow modifications of
;; `htmlize-convert-nonascii-to-entities' to take effect.
(defvar htmlize-extended-character-cache (make-hash-table :test 'eq))

(defun htmlize-protect-string (string)
  "HTML-protect string, escaping HTML metacharacters and I18N chars."
  ;; Only protecting strings that actually contain unsafe or non-ASCII
  ;; chars removes a lot of unnecessary consing.
  (if (not (string-match "[^\r\n\t -%'-;=?-~]" string))
      string
    (mapconcat (lambda (char)
		 (cond
		  ((< char 128)
		   ;; ASCII: use htmlize-basic-character-table.
		   (aref htmlize-basic-character-table char))
		  ((gethash char htmlize-extended-character-cache)
		   ;; We've already seen this char; return the cached
		   ;; string.
		   )
		  ((not htmlize-convert-nonascii-to-entities)
		   ;; If conversion to entities is not desired, always
		   ;; copy the char literally.
		   (setf (gethash char htmlize-extended-character-cache)
			 (char-to-string char)))
		  ((< char 256)
		   ;; Latin 1: no need to call encode-char.
		   (setf (gethash char htmlize-extended-character-cache)
			 (format "&#%d;" char)))
		  ((and (fboundp 'encode-char)
			;; Have to check: encode-char fails for Arabic
			;; and possibly other chars.
			(encode-char char 'ucs))
		   (setf (gethash char htmlize-extended-character-cache)
			 (format "&#%d;" (encode-char char 'ucs))))
		  (t
		   ;; encode-char doesn't work for this char.  Copy it
		   ;; unchanged and hope for the best.
		   (setf (gethash char htmlize-extended-character-cache)
			 (char-to-string char)))))
	       string "")))

(defun htmlize-buffer-substring-no-invisible (beg end)
  ;; Like buffer-substring-no-properties, but don't copy invisible
  ;; parts of the region.
  (let ((pos beg)
	visible-list invisible next-change)
    ;; Iterate over the changes in the `invisible' property and filter
    ;; out the portions where it's non-nil, i.e. where the text is
    ;; invisible.
    (while (< pos end)
      (setq invisible (get-char-property pos 'invisible)
	    next-change (htmlize-next-change pos 'invisible end))
      (unless invisible
	(push (buffer-substring-no-properties pos next-change)
	      visible-list))
      (setq pos next-change))
    (if (= (length visible-list) 1)
	;; If VISIBLE-LIST consists of only one element, return it
	;; without concatenation.  This avoids additional consing in
	;; regions without any invisible text.
	(car visible-list)
      (apply #'concat (nreverse visible-list)))))

(defconst htmlize-tab-spaces
  ;; A table of strings with spaces.  (aref htmlize-tab-spaces 5) is
  ;; like (make-string 5 ?\ ), except it doesn't cons.
  (let ((v (make-vector 32 nil)))
    (dotimes (i (length v))
      (setf (aref v i) (make-string i ?\ )))
    v))

(defun htmlize-untabify (text start-column)
  "Untabify TEXT, assuming it starts at START-COLUMN."
  (let ((column start-column)
	(last-match 0)
	(chunk-start 0)
	chunks match-pos tab-size)
    (while (string-match "[\t\n]" text last-match)
      (setq match-pos (match-beginning 0))
      (cond ((eq (aref text match-pos) ?\t)
	     ;; Encountered a tab: create a chunk of text followed by
	     ;; the expanded tab.
	     (push (substring text chunk-start match-pos) chunks)
	     ;; Increase COLUMN by the length of the text we've
	     ;; skipped since last tab or newline.  (Encountering
	     ;; newline resets it.)
	     (incf column (- match-pos last-match))
	     ;; Calculate tab size based on tab-width and COLUMN.
	     (setq tab-size (- tab-width (% column tab-width)))
	     ;; Expand the tab.
	     (push (aref htmlize-tab-spaces tab-size) chunks)
	     (incf column tab-size)
	     (setq chunk-start (1+ match-pos)))
	    (t
	     ;; Reset COLUMN at beginning of line.
	     (setq column 0)))
      (setq last-match (1+ match-pos)))
    ;; If no chunks have been allocated, it means there have been no
    ;; tabs to expand.  Return TEXT unmodified.
    (if (null chunks)
	text
      (when (< chunk-start (length text))
	;; Push the remaining chunk.
	(push (substring text chunk-start) chunks))
      ;; Generate the output from the available chunks.
      (apply #'concat (nreverse chunks)))))

(defun htmlize-despam-address (string)
  "Replace every occurrence of '@' in STRING with &#64;.
`htmlize-make-hyperlinks' uses this to spam-protect mailto links
without modifying their meaning."
  ;; Suggested by Ville Skytta.
  (while (string-match "@" string)
    (setq string (replace-match "&#64;" nil t string)))
  string)

(defun htmlize-make-hyperlinks ()
  "Make hyperlinks in HTML."
  ;; Function originally submitted by Ville Skytta.  Rewritten by
  ;; Hrvoje Niksic, then modified by Ville Skytta and Hrvoje Niksic.
  (goto-char (point-min))
  (while (re-search-forward
	  "&lt;\\(\\(mailto:\\)?\\([-=+_.a-zA-Z0-9]+@[-_.a-zA-Z0-9]+\\)\\)&gt;"
	  nil t)
    (let ((address (match-string 3))
	  (link-text (match-string 1)))
      (delete-region (match-beginning 0) (match-end 0))
      (insert "&lt;<a href=\"mailto:"
	      (htmlize-despam-address address)
	      "\">"
	      (htmlize-despam-address link-text)
	      "</a>&gt;")))
  (goto-char (point-min))
  (while (re-search-forward "&lt;\\(\\(URL:\\)?\\([a-zA-Z]+://[^;]+\\)\\)&gt;"
			    nil t)
    (let ((url (match-string 3))
	  (link-text (match-string 1)))
      (delete-region (match-beginning 0) (match-end 0))
      (insert "&lt;<a href=\"" url "\">" link-text "</a>&gt;"))))

;; Tests for htmlize-make-hyperlinks:

;; <mailto:hniksic@xemacs.org>
;; <http://fly.srk.fer.hr>
;; <URL:http://www.xemacs.org>
;; <http://www.mail-archive.com/bbdb-info@xemacs.org/>
;; <hniksic@xemacs.org>
;; <xalan-dev-sc.10148567319.hacuhiucknfgmpfnjcpg-john=doe.com@xml.apache.org>

;;; Color handling.

(if (fboundp 'locate-file)
    (defalias 'htmlize-locate-file 'locate-file)
  (defun htmlize-locate-file (file path)
    (dolist (dir path nil)
      (when (file-exists-p (expand-file-name file dir))
	(return (expand-file-name file dir))))))

(defvar htmlize-x-library-search-path
  '("/usr/X11R6/lib/X11/"
    "/usr/X11R5/lib/X11/"
    "/usr/lib/X11R6/X11/"
    "/usr/lib/X11R5/X11/"
    "/usr/local/X11R6/lib/X11/"
    "/usr/local/X11R5/lib/X11/"
    "/usr/local/lib/X11R6/X11/"
    "/usr/local/lib/X11R5/X11/"
    "/usr/X11/lib/X11/"
    "/usr/lib/X11/"
    "/usr/local/lib/X11/"
    "/usr/X386/lib/X11/"
    "/usr/x386/lib/X11/"
    "/usr/XFree86/lib/X11/"
    "/usr/unsupported/lib/X11/"
    "/usr/athena/lib/X11/"
    "/usr/local/x11r5/lib/X11/"
    "/usr/lpp/Xamples/lib/X11/"
    "/usr/openwin/lib/X11/"
    "/usr/openwin/share/lib/X11/"))

(defun htmlize-get-color-rgb-hash (&optional rgb-file)
  "Return a hash table mapping X color names to RGB values.
The keys in the hash table are X11 color names, and the values are the
#rrggbb RGB specifications, extracted from `rgb.txt'.

If RGB-FILE is nil, the function will try hard to find a suitable file
in the system directories.

If no rgb.txt file is found, return nil."
  (let ((rgb-file (or rgb-file (htmlize-locate-file
				"rgb.txt"
				htmlize-x-library-search-path)))
	(hash nil))
    (when rgb-file
      (with-temp-buffer
	(insert-file-contents rgb-file)
	(setq hash (make-hash-table :test 'equal))
	(while (not (eobp))
	  (cond ((looking-at "^\\s-*\\([!#]\\|$\\)")
		 ;; Skip comments and empty lines.
		 )
		((looking-at
		  "[ \t]*\\([0-9]+\\)[ \t]+\\([0-9]+\\)[ \t]+\\([0-9]+\\)[ \t]+\\(.*\\)")
		 (setf (gethash (downcase (match-string 4)) hash)
		       (format "#%02x%02x%02x"
			       (string-to-number (match-string 1))
			       (string-to-number (match-string 2))
			       (string-to-number (match-string 3)))))
		(t
		 (error
		  "Unrecognized line in %s: %s"
		  rgb-file
		  (buffer-substring (point) (progn (end-of-line) (point))))))
	  (forward-line 1))))
    hash))

;; Compile the RGB map when loaded.  On systems where rgb.txt is
;; missing, the value of the variable will be nil, and rgb.txt will
;; not be used.
(defvar htmlize-color-rgb-hash (htmlize-get-color-rgb-hash))

;;; Face handling.

(defun htmlize-face-specifies-property (face prop)
  ;; Return t if face specifies PROP, as opposed to it being inherited
  ;; from the default face.  The problem with e.g.
  ;; `face-foreground-instance' is that it returns an instance for
  ;; EVERY face because every face inherits from the default face.
  ;; However, we'd like htmlize-face-{fore,back}ground to return nil
  ;; when called with a face that doesn't specify its own foreground
  ;; or background.
  (or (eq face 'default)
      (assq 'global (specifier-spec-list (face-property face prop)))))

(defun htmlize-face-color-internal (face fg)
  ;; Used only under GNU Emacs.  Return the color of FACE, but don't
  ;; return "unspecified-fg" or "unspecified-bg".  If the face is
  ;; `default' and the color is unspecified, look up the color in
  ;; frame parameters.
  (let ((color (if fg (face-foreground face) (face-background face))))
    (when (and (eq face 'default) (null color))
      (setq color (cdr (assq (if fg 'foreground-color 'background-color)
			     (frame-parameters)))))
    (when (or (equal color "unspecified-fg")
	      (equal color "unspecified-bg"))
      (setq color nil))
    (when (and (eq face 'default)
	       (null color))
      ;; Assuming black on white doesn't seem right, but I can't think
      ;; of anything better to do.
      (setq color (if fg "black" "white")))
    color))

(defun htmlize-face-foreground (face)
  ;; Return the name of the foreground color of FACE.  If FACE does
  ;; not specify a foreground color, return nil.
  (cond (htmlize-running-xemacs
	 ;; XEmacs.
	 (and (htmlize-face-specifies-property face 'foreground)
	      (color-instance-name (face-foreground-instance face))))
	(t
	 ;; GNU Emacs.
	 (htmlize-face-color-internal face t))))

(defun htmlize-face-background (face)
  ;; Return the name of the background color of FACE.  If FACE does
  ;; not specify a background color, return nil.
  (cond (htmlize-running-xemacs
	 ;; XEmacs.
	 (and (htmlize-face-specifies-property face 'background)
	      (color-instance-name (face-background-instance face))))
	(t
	 ;; GNU Emacs.
	 (htmlize-face-color-internal face nil))))

;; Convert COLOR to the #RRGGBB string.  If COLOR is already in that
;; format, it's left unchanged.

(defun htmlize-color-to-rgb (color)
  (let ((rgb-string nil))
    (cond ((null color)
	   ;; Ignore nil COLOR because it means that the face is not
	   ;; specifying any color.  Hence (htmlize-color-to-rgb nil)
	   ;; returns nil.
	   )
	  ((string-match "\\`#" color)
	   ;; The color is alredy in #rrggbb format.
	   (setq rgb-string color))
	  ((and htmlize-use-rgb-txt
		htmlize-color-rgb-hash)
	   ;; Use of rgb.txt is requested, and it's available on the
	   ;; system.  Use it.
	   (setq rgb-string (gethash (downcase color) htmlize-color-rgb-hash)))
	  (t
	   ;; We're getting the RGB components from Emacs.
	   (let ((rgb
		  ;; Here I cannot conditionalize on (fboundp ...) 
		  ;; because ps-print under some versions of GNU Emacs
		  ;; defines its own dummy version of
		  ;; `color-instance-rgb-components'.
		  (if htmlize-running-xemacs
		      (mapcar (lambda (arg)
				(/ arg 256))
			      (color-instance-rgb-components
			       (make-color-instance color)))
		    (mapcar (lambda (arg)
			      (/ arg 256))
			    (x-color-values color)))))
	     (when rgb
	       (setq rgb-string (apply #'format "#%02x%02x%02x" rgb))))))
    ;; If RGB-STRING is still nil, it means the color cannot be found,
    ;; for whatever reason.  In that case just punt and return COLOR.
    ;; Most browsers support a decent set of color names anyway.
    (or rgb-string color)))

;; We store the face properties we care about into an
;; `htmlize-fstruct' type.  That way we only have to analyze face
;; properties, which can be time consuming, once per each face.  The
;; mapping between Emacs faces and htmlize-fstructs is established by
;; htmlize-make-face-map.  The name "fstruct" refers to variables of
;; type `htmlize-fstruct', while the term "face" is reserved for Emacs
;; faces.

(defstruct htmlize-fstruct
  foreground				; foreground color, #rrggbb
  background				; background color, #rrggbb
  boldp					; whether face is bold
  italicp				; whether face is italic
  underlinep				; whether face is underlined
  overlinep				; whether face is overlined
  strikep				; whether face is striked through
  css-name				; CSS name of face
  )

(defun htmlize-face-emacs21-attr (fstruct attr value)
  ;; For ATTR and VALUE, set the equivalent value in FSTRUCT.
  (case attr
    (:foreground
     (setf (htmlize-fstruct-foreground fstruct) (htmlize-color-to-rgb value)))
    (:background
     (setf (htmlize-fstruct-background fstruct) (htmlize-color-to-rgb value)))
    (:weight
     (when (string-match (symbol-name value) "bold")
       (setf (htmlize-fstruct-boldp fstruct) t)))
    (:slant
     (setf (htmlize-fstruct-italicp fstruct) (or (eq value 'italic)
						 (eq value 'oblique))))
    (:bold
     (setf (htmlize-fstruct-boldp fstruct) value))
    (:italic
     (setf (htmlize-fstruct-italicp fstruct) value))
    (:underline
     (setf (htmlize-fstruct-underlinep fstruct) value))
    (:overline
     (setf (htmlize-fstruct-overlinep fstruct) value))
    (:strike-through
     (setf (htmlize-fstruct-strikep fstruct) value))))

(defun htmlize-face-to-fstruct (face)
  "Convert Emacs face FACE to fstruct."
  (let ((fstruct (make-htmlize-fstruct
		  :foreground (htmlize-color-to-rgb
			       (htmlize-face-foreground face))
		  :background (htmlize-color-to-rgb
			       (htmlize-face-background face)))))
    (cond (htmlize-running-xemacs
	   ;; XEmacs doesn't provide a way to detect whether a face is
	   ;; bold or italic, so we need to examine the font instance.
	   ;; #### This probably doesn't work under MS Windows and/or
	   ;; GTK devices.  I'll need help with those.
	   (let* ((font-instance (face-font-instance face))
		  (props (font-instance-properties font-instance)))
	     (when (equalp (cdr (assq 'WEIGHT_NAME props)) "bold")
	       (setf (htmlize-fstruct-boldp fstruct) t))
	     (when (or (equalp (cdr (assq 'SLANT props)) "i")
		       (equalp (cdr (assq 'SLANT props)) "o"))
	       (setf (htmlize-fstruct-italicp fstruct) t))
	     (setf (htmlize-fstruct-strikep fstruct)
		   (face-strikethru-p face))
	     (setf (htmlize-fstruct-underlinep fstruct)
		   (face-underline-p face))))
	  ((fboundp 'face-attribute)
	   ;; GNU Emacs 21.
	   (dolist (attr '(:weight :slant :underline :overline :strike-through))
	     (let ((value (face-attribute face attr)))
	       (when (and value (not (eq value 'unspecified)))
		 (htmlize-face-emacs21-attr fstruct attr value)))))
	  (t
	   ;; Older GNU Emacs.  Some of these functions are only
	   ;; available under Emacs 20+, hence the guards.
	   (when (fboundp 'face-bold-p)
	     (setf (htmlize-fstruct-boldp fstruct) (face-bold-p face)))
	   (when (fboundp 'face-italic-p)
	     (setf (htmlize-fstruct-italicp fstruct) (face-italic-p face)))
	   (setf (htmlize-fstruct-underlinep fstruct)
		 (face-underline-p face))))
    ;; Generate the css-name property.  Emacs places no restrictions
    ;; on the names of symbols that represent faces -- any characters
    ;; may be in the name, even ^@.  We try hard to beat the face name
    ;; into shape, both esthetically and according to CSS1 specs.
    (setf (htmlize-fstruct-css-name fstruct)
	  (let ((name (downcase (symbol-name face))))
	    (when (string-match "\\`font-lock-" name)
	      ;; Change font-lock-FOO-face to FOO.
	      (setq name (replace-match "" t t name)))
	    (when (string-match "-face\\'" name)
	      ;; Drop the redundant "-face" suffix.
	      (setq name (replace-match "" t t name)))
	    (while (string-match "[^-a-zA-Z0-9]" name)
	      ;; Drop the non-alphanumerics.
	      (setq name (replace-match "X" t t name)))
	    (when (string-match "\\`[-0-9]" name)
	      ;; CSS identifiers may not start with a digit.
	      (setq name (concat "X" name)))
	    ;; After these transformations, the face could come
	    ;; out empty.
	    (when (equal name "")
	      (setq name "face"))
	    ;; Apply the prefix.
	    (setq name (concat htmlize-css-name-prefix name))
	    name))
    fstruct))

;; GNU Emacs 20+ supports attribute lists in `face' properties.  For
;; example, you can use `(:foreground "red" :weight bold)' as an
;; overlay's "face", or you can even use a list of such lists, etc.
;; We call those "attrlists".
;;
;; htmlize supports attrlist by converting them to fstructs, the same
;; as with regular faces.

(defun htmlize-attrlist-to-fstruct (attrlist)
  ;; Like htmlize-face-to-fstruct, but accepts an ATTRLIST as input.
  (let ((fstruct (make-htmlize-fstruct)))
    (cond ((eq (car attrlist) 'foreground-color)
	   ;; ATTRLIST is (foreground-color . COLOR)
	   (setf (htmlize-fstruct-foreground fstruct)
		 (htmlize-color-to-rgb (cdr attrlist))))
	  ((eq (car attrlist) 'background-color)
	   ;; ATTRLIST is (background-color . COLOR)
	   (setf (htmlize-fstruct-background fstruct)
		 (htmlize-color-to-rgb (cdr attrlist))))
	  (t
	   ;; ATTRLIST is a plist.
	   (while attrlist
	     (let ((attr (pop attrlist))
		   (value (pop attrlist)))
	       (when (and value (not (eq value 'unspecified)))
		 (htmlize-face-emacs21-attr fstruct attr value))))))
    (setf (htmlize-fstruct-css-name fstruct) "ATTRLIST")
    fstruct))

(defun htmlize-face-list-p (face-prop)
  "Return non-nil if FACE-PROP is a list of faces, nil otherwise."
  ;; If not for attrlists, this would return (listp face-prop).  This
  ;; way we have to be more careful because some an attrlist is also a
  ;; list!
  (cond
   ((eq face-prop nil)
    ;; FACE-PROP being nil means empty list (no face), so return t.
    t)
   ((symbolp face-prop)
    ;; A symbol other than nil means that it's only one face, so return
    ;; nil.
    nil)
   ((not (consp face-prop))
    ;; Huh?  Not a symbol or cons -- treat it as a single element.
    nil)
   (t
    ;; We know that FACE-PROP is a cons: check whether it looks like an
    ;; ATTRLIST.
    (let* ((car (car face-prop))
	   (attrlist-p (and (symbolp car)
			    (or (eq car 'foreground-color)
				(eq car 'background-color)
				(eq (aref (symbol-name car) 0) ?:)))))
      ;; If FACE-PROP is not an ATTRLIST, it means it's a list of
      ;; faces.
      (not attrlist-p)))))

(defun htmlize-make-face-map (faces)
  ;; Return a hash table mapping Emacs faces to htmlize's fstructs.
  ;; The keys are either face symbols or attrlists, so the test
  ;; function must be `equal'.
  (let ((face-map (make-hash-table :test 'equal))
	css-names)
    (dolist (face faces)
      (unless (gethash face face-map)
	;; Haven't seen FACE yet; convert it to an fstruct and cache
	;; it.
	(let ((fstruct (if (symbolp face)
			   (htmlize-face-to-fstruct face)
			 (htmlize-attrlist-to-fstruct face))))
	  (setf (gethash face face-map) fstruct)
	  (let* ((css-name (htmlize-fstruct-css-name fstruct))
		 (new-name css-name)
		 (i 0))
	    ;; Uniquify the face's css-name by using NAME-1, NAME-2,
	    ;; etc.
	    (while (member new-name css-names)
	      (setq new-name (format "%s-%s" css-name (incf i))))
	    (unless (equal new-name css-name)
	      (setf (htmlize-fstruct-css-name fstruct) new-name))
	    (push new-name css-names)))))
    face-map))

(defun htmlize-faces-in-buffer ()
  "Return a list of faces used in the current buffer.
Under XEmacs, this returns the set of faces specified by the extents
with the `face' property.  (This covers text properties as well.)  Under
GNU Emacs, it returns the set of faces specified by the `face' text
property and by buffer overlays that specify `face'."
  (let (faces)
    ;; Testing for (fboundp 'map-extents) doesn't work because W3
    ;; defines `map-extents' under FSF.
    (if htmlize-running-xemacs
	(let (face-prop)
	  (map-extents (lambda (extent ignored)
			 (setq face-prop (extent-face extent)
			       ;; FACE-PROP can be a face or a list of
			       ;; faces.
			       faces (if (listp face-prop)
					 (union face-prop faces)
				       (adjoin face-prop faces)))
			 nil)
		       nil
		       ;; Specify endpoints explicitly to respect
		       ;; narrowing.
		       (point-min) (point-max) nil nil 'face))
      ;; FSF Emacs code.
      ;; Faces used by text properties.
      (let ((pos (point-min)) face-prop next)
	(while (< pos (point-max))
	  (setq face-prop (get-text-property pos 'face)
		next (or (next-single-property-change pos 'face) (point-max)))
	  ;; FACE-PROP can be a face/attrlist or a list thereof.
	  (setq faces (if (htmlize-face-list-p face-prop)
			  (union face-prop faces :test 'equal)
			(adjoin face-prop faces :test 'equal)))
	  (setq pos next)))
      ;; Faces used by overlays.
      (dolist (overlay (overlays-in (point-min) (point-max)))
	(let ((face-prop (overlay-get overlay 'face)))
	  ;; FACE-PROP can be a face/attrlist or a list thereof.
	  (setq faces (if (htmlize-face-list-p face-prop)
			  (union face-prop faces :test 'equal)
			(adjoin face-prop faces :test 'equal))))))
    faces))

;; htmlize-faces-at-point returns the faces in use at point.  The
;; faces are sorted by increasing priority, i.e. the last face takes
;; precedence.
;;
;; Under XEmacs, this returns all the faces in all the extents at
;; point.  Under GNU Emacs, this returns all the faces in the `face'
;; property and all the faces in the overlays at point.

(cond (htmlize-running-xemacs
       (defun htmlize-faces-at-point ()
	 (let (extent list face-prop)
	   (while (setq extent (extent-at (point) nil 'face extent))
	     (setq face-prop (extent-face extent))
	     (setq list (if (listp face-prop)
			    (nconc (reverse face-prop) list)
			  (cons face-prop list))))
	   ;; No need to reverse the list: PUSH has already
	   ;; constructed it in the reverse display order.
	   list)))
      (t
       (defun htmlize-faces-at-point ()
	 (let (all-faces)
	   ;; Faces from text properties.
	   (let ((face-prop (get-text-property (point) 'face)))
	     (setq all-faces (if (htmlize-face-list-p face-prop)
				 (reverse face-prop)
			       (list face-prop))))
	   ;; Faces from overlays.
	   (let ((overlays
		  ;; Collect overlays at point that specify `face'.
		  (delete-if-not (lambda (o)
				   (overlay-get o 'face))
				 (overlays-at (point))))
		 list face-prop)
	     ;; Sort the overlays so the smaller (more specific) ones
	     ;; come later.  The number of overlays at each one
	     ;; position should be very small, so the sort shouldn't
	     ;; slow things down.
	     (setq overlays (sort* overlays
				   ;; Sort by ascending...
				   #'<
				   ;; ...overlay size.
				   :key (lambda (o)
					  (- (overlay-end o)
					     (overlay-start o)))))
	     (dolist (overlay overlays)
	       (setq face-prop (overlay-get overlay 'face))
	       (setq list (if (htmlize-face-list-p face-prop)
			      (nconc (reverse face-prop) list)
			    (cons face-prop list))))
	     (setq all-faces (nconc all-faces list)))))))

;; htmlize supports generating HTML in two several fundamentally
;; different ways, one with the use of CSS and nested <span> tags, and
;; the other with the use of the old <font> tags.  Rather than adding
;; a bunch of if's to many places, we take a semi-OO approach.
;; `htmlize-buffer-1' calls a number of "methods", which indirect to
;; the functions that depend on `htmlize-output-type'.  The currently
;; used methods are `doctype', `insert-head', `body-tag', and
;; `insert-text'.  Not all output types define all methods.
;;
;; Methods are called either with (htmlize-method METHOD ARGS...) 
;; special form, or by accessing the function with
;; (htmlize-method-function 'METHOD) and calling (funcall FUNCTION).
;; The latter form is useful in tight loops because `htmlize-method'
;; conses.
;;
;; Currently defined output types are `css' and `font'.

(defmacro htmlize-method (method &rest args)
  ;; Expand to (htmlize-TYPE-METHOD ...ARGS...).  TYPE is the value of
  ;; `htmlize-output-type' at run time.
  `(funcall (htmlize-method-function ',method) ,@args))

(defun htmlize-method-function (method)
  ;; Return METHOD's function definition for the current output type.
  ;; The returned object can be safely funcalled.
  (let ((sym (intern (format "htmlize-%s-%s" htmlize-output-type method))))
    (indirect-function (if (fboundp sym) sym 'ignore))))

;;; CSS based output support.

(defun htmlize-css-doctype ()
  nil					; no doc-string
  "<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01//EN\">")

;; Internal function; not a method.
(defun htmlize-css-specs (fstruct)
  (let (result)
    (when (htmlize-fstruct-foreground fstruct)
      (push (format "color: %s;" (htmlize-fstruct-foreground fstruct))
	    result))
    (when (htmlize-fstruct-background fstruct)
      (push (format "background-color: %s;"
		    (htmlize-fstruct-background fstruct))
	    result))
    (when (htmlize-fstruct-boldp fstruct)
      (push "font-weight: bold;" result))
    (when (htmlize-fstruct-italicp fstruct)
      (push "font-style: italic;" result))
    (when (htmlize-fstruct-underlinep fstruct)
      (push "text-decoration: underline;" result))
    (when (htmlize-fstruct-overlinep fstruct)
      (push "text-decoration: overline;" result))
    (when (htmlize-fstruct-strikep fstruct)
      (push "text-decoration: line-through;" result))
    (nreverse result)))

(defun htmlize-css-insert-head (buffer-faces face-map)
  (insert "    <style type=\"text/css\">\n    <!--\n")
  (insert "      body {\n        "
	  (mapconcat #'identity
		     (htmlize-css-specs (gethash 'default face-map))
		     "\n        ")
	  "\n      }\n")
  (dolist (face (sort* (copy-list buffer-faces) #'string-lessp
		       :key (lambda (f)
			      (htmlize-fstruct-css-name (gethash f face-map)))))
    (let* ((fstruct (gethash face face-map))
	   (cleaned-up-face-name
	    (let ((s
		   ;; Use `prin1-to-string' rather than `symbol-name'
		   ;; to get the face name because the "face" can also
		   ;; be an attrlist, which is not a symbol.
		   (prin1-to-string face)))
	      ;; If the name contains `--' or `*/', remove them.
	      (while (string-match "--" s)
		(setq s (replace-match "-" t t s)))
	      (while (string-match "\\*/" s)
		(setq s (replace-match "XX" t t s)))
	      s))
	   (specs (htmlize-css-specs fstruct)))
      (insert "      ." (htmlize-fstruct-css-name fstruct))
      (if (null specs)
	  (insert " {")
	(insert " {\n        /* " cleaned-up-face-name " */\n        "
		(mapconcat #'identity specs "\n        ")))
      (insert "\n      }\n")))
  (insert htmlize-hyperlink-style
	  "    -->\n    </style>\n"))

(defun htmlize-css-insert-text (text fstruct-list buffer)
  ;; Insert TEXT colored with FACES into BUFFER.  In CSS mode, this is
  ;; easy: just nest the text in one <span class=...> tag for each
  ;; face in FSTRUCT-LIST.
  (dolist (fstruct fstruct-list)
    (princ "<span class=\"" buffer)
    (princ (htmlize-fstruct-css-name fstruct) buffer)
    (princ "\">" buffer))
  (princ text buffer)
  (dolist (fstruct fstruct-list)
    (ignore fstruct)			; shut up the byte-compiler
    (princ "</span>" buffer)))

;;; `font' tag based output support.

(defun htmlize-font-doctype ()
  nil					; no doc-string

  ;; According to DTDs published by the W3C, it is illegal to embed
  ;; <font> in <pre>.  This makes sense in general, but is bad for
  ;; htmlize's intended usage of <font> to specify the document color.

  ;; To make generated HTML legal, htmlize.el used to specify the SGML
  ;; declaration of "HTML Pro" DTD here.  HTML Pro aka Silmaril DTD
  ;; was a project whose goal was to produce a DTD that would
  ;; encompass all the incompatible HTML extensions procured by
  ;; Netscape, MSIE, and other players in the field.  Apparently the
  ;; project got abandoned, the last available version being "Draft 0
  ;; Revision 11" from January 1997, as documented at
  ;; <http://validator.w3.org/sgml-lib/pro/html/dtds/htmlpro.html>.

  ;; Since by now (2001) HTML Pro is remembered by none but the most
  ;; die-hard early-web-days nostalgics and used by not even them,
  ;; there is no use in specifying it.  So we return the standard HTML
  ;; 4.0 declaration, which makes generated HTML technically illegal.
  ;; If you have a problem with that, use the `css' generation engine
  ;; which I believe creates fully conformant HTML.

  "<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01//EN\">"

  ;; Now-abandoned HTML Pro declaration.
  ;"<!DOCTYPE HTML PUBLIC \"+//Silmaril//DTD HTML Pro v0r11 19970101//EN\">"
  )

(defun htmlize-font-body-tag (face-map)
  (let ((fstruct (gethash 'default face-map)))
    (format "<body text=\"%s\" bgcolor=\"%s\">"
	    (htmlize-fstruct-foreground fstruct)
	    (htmlize-fstruct-background fstruct))))

(defun htmlize-font-insert-text (text fstruct-list buffer)
  ;; In `font' mode, we use the traditional HTML means of altering
  ;; presentation: <font> tag for colors, <b> for bold, <u> for
  ;; underline, and <strike> for strike-through.
  (let (bold italic underline strike fg)
    ;; Merge the face attributes.
    (dolist (fstruct fstruct-list)
      ;; A non-null boolean attribute in any face sets the attribute.
      (and (htmlize-fstruct-boldp fstruct)      (setq bold t))
      (and (htmlize-fstruct-italicp fstruct)    (setq italic t))
      (and (htmlize-fstruct-underlinep fstruct) (setq underline t))
      (and (htmlize-fstruct-strikep fstruct)    (setq strike t))
      ;; The foreground/background of the last face in the list wins.
      (and (htmlize-fstruct-foreground fstruct)
	   (setq fg (htmlize-fstruct-foreground fstruct))))

    ;; Generate the markup that reflects the merged attributes.
    (princ (concat
	    (and fg        (format "<font color=\"%s\">" fg))
	    (and bold      "<b>")
	    (and italic    "<i>")
	    (and underline "<u>")
	    (and strike    "<strike>"))
	   buffer)
    ;; Print the text.
    (princ text buffer)
    ;; Close the tags we've opened.
    (princ (concat
	    (and strike    "</strike>")
	    (and underline "</u>")
	    (and italic    "</i>")
	    (and bold      "</b>")
	    (and fg        "</font>"))
	   buffer)))

(defun htmlize-buffer-1 ()
  ;; Internal function; don't call it from outside this file.  Htmlize
  ;; current buffer, writing the resulting HTML to a new buffer, and
  ;; return it.  Unlike htmlize-buffer, this doesn't change current
  ;; buffer or use switch-to-buffer.
  (save-excursion
    ;; Protect against the hook changing the current buffer.
    (save-excursion
      (run-hooks 'htmlize-before-hook))
    ;; Convince font-lock support modes to fontify the entire buffer
    ;; in advance.
    (htmlize-ensure-fontified)
    (clrhash htmlize-extended-character-cache)
    (let* ((buffer-faces (htmlize-faces-in-buffer))
	   (face-map (htmlize-make-face-map (adjoin 'default buffer-faces)))
	   ;; Generate the new buffer.  It's important that it inherits
	   ;; default-directory from the current buffer.
	   (htmlbuf (generate-new-buffer (if (buffer-file-name)
					     (htmlize-make-file-name
					      (file-name-nondirectory
					       (buffer-file-name)))
					   "*html*")))
	   (title (if (buffer-file-name)
		      (file-name-nondirectory (buffer-file-name))
		    (buffer-name))))
      ;; Initialize HTMLBUF and insert the HTML prolog.
      (with-current-buffer htmlbuf
	(buffer-disable-undo)
	(insert (htmlize-method doctype) ?\n
		(format "<!-- Created by htmlize-%s in %s mode. -->\n"
			htmlize-version htmlize-output-type)
		"<html>\n  <head>\n"
		"    <title>" (htmlize-protect-string title) "</title>\n"
		(if htmlize-html-charset
		    (format (concat "    <meta http-equiv=\"Content-Type\" "
				    "content=\"text/html; charset=%s\">\n")
			    htmlize-html-charset)
		  "")
		htmlize-head-tags)
	(htmlize-method insert-head buffer-faces face-map)
	(insert "  </head>"
		"\n  "
		(or (htmlize-method body-tag face-map)
		    "<body>")
		"\n    <pre>\n"))
      (let ((insert-text-method
	     ;; Get the inserter method, so we can funcall it inside
	     ;; the loop.  Not calling `htmlize-method' in the loop
	     ;; body yields a measurable speed increase.
	     (htmlize-method-function 'insert-text))
	    ;; Declare variables used in loop body outside the loop
	    ;; because it's faster to establish `let' bindings only
	    ;; once.
	    next-change text face-list fstruct-list)
	;; This loop traverses and reads the source buffer, appending
	;; the resulting HTML to HTMLBUF with `princ'.  This method is
	;; fast because: 1) it doesn't require examining the text
	;; properties char by char (htmlize-next-change is used to
	;; move between runs with the same face), and 2) it doesn't
	;; require buffer switches, which are slow in Emacs.
	(goto-char (point-min))
	(while (not (eobp))
	  (setq next-change (htmlize-next-change (point) 'face))
	  ;; Get faces in use between (point) and NEXT-CHANGE, and
	  ;; convert them to fstructs.
	  (setq face-list (htmlize-faces-at-point)
		fstruct-list (delq nil (mapcar (lambda (f)
						 (gethash f face-map))
					       face-list)))
	  ;; Extract buffer text, sans the invisible parts.  Then
	  ;; untabify it and escape the HTML metacharacters.
	  (setq text (htmlize-buffer-substring-no-invisible
		      (point) next-change))
	  (setq text (htmlize-untabify text (current-column)))
	  (setq text (htmlize-protect-string text))
	  ;; Don't bother writing anything if there's no text (this
	  ;; happens in invisible regions).
	  (when (> (length text) 0)
	    ;; Insert the text, along with the necessary markup to
	    ;; represent faces in FSTRUCT-LIST.
	    (funcall insert-text-method text fstruct-list htmlbuf))
	  (goto-char next-change)))

      ;; Insert the epilog.
      (with-current-buffer htmlbuf
	(insert "</pre>\n  </body>\n</html>\n")
	(when htmlize-generate-hyperlinks
	  (htmlize-make-hyperlinks))
	(goto-char (point-min))
	(when htmlize-html-major-mode
	  ;; What sucks about this is that the minor modes, most notably
	  ;; font-lock-mode, won't be initialized.  Oh well.
	  (funcall htmlize-html-major-mode))
	(run-hooks 'htmlize-after-hook)
	(buffer-enable-undo))
      htmlbuf)))

;; Utility functions.

(defun htmlize-ensure-fontified ()
  ;; If font-lock is being used, ensure that the "support" modes
  ;; actually fontify the buffer.  If font-lock is not in use, we
  ;; don't care because, except in htmlize-file, we don't force
  ;; font-lock on the user.
  (when (and (boundp 'font-lock-mode)
	     font-lock-mode)
    ;; In part taken from ps-print-ensure-fontified in GNU Emacs 21.
    (cond
     ((and (boundp 'jit-lock-mode)
	   (symbol-value 'jit-lock-mode))
      (jit-lock-fontify-now (point-min) (point-max)))
     ((and (boundp 'lazy-lock-mode)
	   (symbol-value 'lazy-lock-mode))
      (lazy-lock-fontify-region (point-min) (point-max)))
     ((and (boundp 'lazy-shot-mode)
	   (symbol-value 'lazy-shot-mode))
      ;; lazy-shot is amazing in that it must *refontify* the region,
      ;; even if the whole buffer has already been fontified.  <sigh>
      (lazy-shot-fontify-region (point-min) (point-max)))
     ;; There's also fast-lock, but we don't need to handle specially,
     ;; I think.  fast-lock doesn't really defer fontification, it
     ;; just saves it to an external cache so it's not done twice.
     )))


;;;###autoload
(defun htmlize-buffer (&optional buffer)
  "Convert BUFFER to HTML, preserving colors and decorations.

The generated HTML is available in a new buffer, which is returned.
When invoked interactively, the new buffer is selected in the current
window.  The title of the generated document will be set to the buffer's
file name or, if that's not available, to the buffer's name.

Note that htmlize doesn't fontify your buffers, it only uses the
decorations that are already present.  If you don't set up font-lock or
something else to fontify your buffers, the resulting HTML will be
plain.  Likewise, if you don't like the choice of colors, fix the mode
that created them, or simply alter the faces it uses."
  (interactive)
  (let ((htmlbuf (with-current-buffer (or buffer (current-buffer))
		   (htmlize-buffer-1))))
    (when (interactive-p)
      (switch-to-buffer htmlbuf))
    htmlbuf))

;;;###autoload
(defun htmlize-region (beg end)
  "Convert the region to HTML, preserving colors and decorations.
See `htmlize-buffer' for details."
  (interactive "r")
  ;; Don't let zmacs region highlighting end up in HTML.
  (when (fboundp 'zmacs-deactivate-region)
    (zmacs-deactivate-region))
  (let ((htmlbuf (save-restriction
		   (narrow-to-region beg end)
		   (htmlize-buffer-1))))
    (when (interactive-p)
      (switch-to-buffer htmlbuf))
    htmlbuf))

(defun htmlize-make-file-name (file)
  "Make an HTML file name from FILE.

In its default implementation, this simply appends `.html' to FILE.
This function is called by htmlize to create the buffer file name, and
by `htmlize-file' to create the target file name.

More elaborate transformations are conceivable, such as changing FILE's
extension to `.html' (\"file.c\" -> \"file.html\").  If you want them,
overload this function to do it and htmlize will comply."
  (concat file ".html"))

;; Older implementation of htmlize-make-file-name that changes FILE's
;; extension to ".html".
;(defun htmlize-make-file-name (file)
;  (let ((extension (file-name-extension file))
;	(sans-extension (file-name-sans-extension file)))
;    (if (or (equal extension "html")
;	    (equal extension "htm")
;	    (equal sans-extension ""))
;	(concat file ".html")
;      (concat sans-extension ".html"))))

;;;###autoload
(defun htmlize-file (file &optional target)
  "Load FILE, fontify it, convert it to HTML, and save the result.

Contents of FILE are inserted into a temporary buffer, whose major mode
is set with `normal-mode' as appropriate for the file type.  The buffer
is subsequently fontified with `font-lock' and converted to HTML.  Note
that, unlike `htmlize-buffer', this function explicitly turns on
font-lock.  If a form of highlighting other than font-lock is desired,
please use `htmlize-buffer' directly on buffers so highlighted.

Buffers currently visiting FILE are unaffected by this function.  The
function does not change current buffer or move the point.

If TARGET is specified and names a directory, the resulting file will be
saved there instead of to FILE's directory.  If TARGET is specified and
does not name a directory, it will be used as output file name."
  (interactive (list (read-file-name
		      "HTML-ize file: "
		      nil nil nil (and (buffer-file-name)
				       (file-name-nondirectory
					(buffer-file-name))))))
  (let ((output-file (if (and target (not (file-directory-p target)))
			 target
		       (expand-file-name
			(htmlize-make-file-name (file-name-nondirectory file))
			(or target (file-name-directory file)))))
	;; Try to prevent `find-file-noselect' from triggering
	;; font-lock because we'll fontify explicitly below.
	(font-lock-mode nil)
	(font-lock-auto-fontify nil)
	(global-font-lock-mode nil)
	;; Ignore the size limit for the purposes of htmlization.
	(font-lock-maximum-size nil)
	;; Disable font-lock support modes.  This will only work in
	;; more recent Emacs versions, so htmlize-buffer-1 still needs
	;; to call htmlize-ensure-fontified.
	(font-lock-support-mode nil))
    (with-temp-buffer
      ;; Insert FILE into the temporary buffer.
      (insert-file-contents file)
      ;; Set the file name so normal-mode and htmlize-buffer-1 pick it
      ;; up.  Restore it afterwards so with-temp-buffer's kill-buffer
      ;; doesn't complain about killing a modified buffer.
      (let ((buffer-file-name file))
	;; Set the major mode for the sake of font-lock.
	(normal-mode)
	(font-lock-mode 1)
	(unless font-lock-mode
	  ;; In GNU Emacs (font-lock-mode 1) doesn't force font-lock,
	  ;; contrary to the documentation.  This seems to work.
	  (font-lock-fontify-buffer))
	;; htmlize the buffer and save the HTML.
	(with-current-buffer (htmlize-buffer-1)
	  (unwind-protect
	      (progn
		(run-hooks 'htmlize-file-hook)
		(write-region (point-min) (point-max) output-file))
	    (kill-buffer (current-buffer)))))))
  ;; I haven't decided on a useful return value yet, so just return
  ;; nil.
  nil)

;;;###autoload
(defun htmlize-many-files (files &optional target-directory)
  "Convert FILES to HTML and save the corresponding HTML versions.

FILES should be a list of file names to convert.  This function calls
`htmlize-file' on each file; see that function for details.  When
invoked interactively, you are prompted for a list of files to convert,
terminated with RET.

If TARGET-DIRECTORY is specified, the HTML files will be saved to that
directory.  Normally, each HTML file is saved to the directory of the
corresponding source file."
  (interactive
   (list
    (let (list file)
      ;; Use empty string as DEFAULT because setting DEFAULT to nil
      ;; defaults to the directory name, which is not what we want.
      (while (not (equal (setq file (read-file-name
				     "HTML-ize file (RET to finish): "
				     (and list (file-name-directory
						(car list)))
				     "" t))
			 ""))
	(push file list))
      (nreverse list))))
  ;; Verify that TARGET-DIRECTORY is indeed a directory.  If it's a
  ;; file, htmlize-file will use it as target, and that doesn't make
  ;; sense.
  (and target-directory
       (not (file-directory-p target-directory))
       (error "target-directory must name a directory: %s" target-directory))
  (dolist (file files)
    (htmlize-file file target-directory)))

;;;###autoload
(defun htmlize-many-files-dired (arg &optional target-directory)
  "HTMLize dired-marked files."
  (interactive "P")
  (htmlize-many-files (dired-get-marked-files nil arg) target-directory))

(provide 'htmlize)

;;; htmlize.el ends here
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.