source: main/trunk/greenstone2/perllib/plugins/HTMLPlugin.pm@ 32096

Last change on this file since 32096 was 32096, checked in by ak19, 3 years ago

Marking all the uses of sysread() with a comment saying they're a candidate to use FileUtils::readUTF8File() in future, if thinking about each case beforehand has confirmed that the contents will indeed be UTF8.

  • Property svn:executable set to *
  • Property svn:keywords set to Author Date Id Revision
File size: 70.3 KB
Line 
1###########################################################################
2#
3# HTMLPlugin.pm -- basic html plugin
4#
5# A component of the Greenstone digital library software
6# from the New Zealand Digital Library Project at the
7# University of Waikato, New Zealand.
8#
9# Copyright (C) 1999 New Zealand Digital Library Project
10#
11# This program is free software; you can redistribute it and/or modify
12# it under the terms of the GNU General Public License as published by
13# the Free Software Foundation; either version 2 of the License, or
14# (at your option) any later version.
15#
16# This program is distributed in the hope that it will be useful,
17# but WITHOUT ANY WARRANTY; without even the implied warranty of
18# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19# GNU General Public License for more details.
20#
21# You should have received a copy of the GNU General Public License
22# along with this program; if not, write to the Free Software
23# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24#
25###########################################################################
26
27#
28# Note that this plugin handles frames only in a very simple way
29# i.e. each frame is treated as a separate document. This means
30# search results will contain links to individual frames rather
31# than linking to the top level frameset.
32# There may also be some problems caused by the _parent target
33# (it's removed by this plugin)
34#
35
36package HTMLPlugin;
37
38use Encode;
39use Unicode::Normalize 'normalize';
40
41use ReadTextFile;
42use HBPlugin;
43use ghtml;
44use unicode;
45use util;
46use FileUtils;
47use XMLParser;
48
49use File::Copy;
50
51sub BEGIN {
52 @HTMLPlugin::ISA = ('ReadTextFile', 'HBPlugin');
53 die "GSDLHOME not set\n" unless defined $ENV{'GSDLHOME'};
54 unshift (@INC, "$ENV{'GSDLHOME'}/perllib/cpan"); # for Image/Size.pm
55}
56
57use Image::Size;
58
59use strict; # every perl program should have this!
60no strict 'refs'; # make an exception so we can use variables as filehandles
61
62my $arguments =
63 [ { 'name' => "process_exp",
64 'desc' => "{BaseImporter.process_exp}",
65 'type' => "regexp",
66 'deft' => &get_default_process_exp() },
67 { 'name' => "block_exp",
68 'desc' => "{CommonUtil.block_exp}",
69 'type' => 'regexp',
70 'deft' => &get_default_block_exp() },
71 { 'name' => "nolinks",
72 'desc' => "{HTMLPlugin.nolinks}",
73 'type' => "flag" },
74 { 'name' => "keep_head",
75 'desc' => "{HTMLPlugin.keep_head}",
76 'type' => "flag" },
77 { 'name' => "no_metadata",
78 'desc' => "{HTMLPlugin.no_metadata}",
79 'type' => "flag" },
80 { 'name' => "metadata_fields",
81 'desc' => "{HTMLPlugin.metadata_fields}",
82 'type' => "string",
83 'deft' => "Title" },
84 { 'name' => "metadata_field_separator",
85 'desc' => "{HTMLPlugin.metadata_field_separator}",
86 'type' => "string",
87 'deft' => "" },
88 { 'name' => "hunt_creator_metadata",
89 'desc' => "{HTMLPlugin.hunt_creator_metadata}",
90 'type' => "flag" },
91 { 'name' => "file_is_url",
92 'desc' => "{HTMLPlugin.file_is_url}",
93 'type' => "flag" },
94 { 'name' => "assoc_files",
95 'desc' => "{HTMLPlugin.assoc_files}",
96 'type' => "regexp",
97 'deft' => &get_default_block_exp() },
98 { 'name' => "rename_assoc_files",
99 'desc' => "{HTMLPlugin.rename_assoc_files}",
100 'type' => "flag" },
101 { 'name' => "title_sub",
102 'desc' => "{HTMLPlugin.title_sub}",
103 'type' => "string",
104 'deft' => "" },
105 { 'name' => "description_tags",
106 'desc' => "{HTMLPlugin.description_tags}",
107 'type' => "flag" },
108 # retain this for backward compatibility (w3mir option was replaced by
109 # file_is_url)
110 { 'name' => "w3mir",
111# 'desc' => "{HTMLPlugin.w3mir}",
112 'type' => "flag",
113 'hiddengli' => "yes"},
114 { 'name' => "no_strip_metadata_html",
115 'desc' => "{HTMLPlugin.no_strip_metadata_html}",
116 'type' => "string",
117 'deft' => "",
118 'reqd' => "no"},
119 { 'name' => "sectionalise_using_h_tags",
120 'desc' => "{HTMLPlugin.sectionalise_using_h_tags}",
121 'type' => "flag" },
122 { 'name' => "use_realistic_book",
123 'desc' => "{HTMLPlugin.tidy_html}",
124 'type' => "flag"},
125 { 'name' => "old_style_HDL",
126 'desc' => "{HTMLPlugin.old_style_HDL}",
127 'type' => "flag"},
128 {'name' => "processing_tmp_files",
129 'desc' => "{BaseImporter.processing_tmp_files}",
130 'type' => "flag",
131 'hiddengli' => "yes"}
132 ];
133
134my $options = { 'name' => "HTMLPlugin",
135 'desc' => "{HTMLPlugin.desc}",
136 'abstract' => "no",
137 'inherits' => "yes",
138 'args' => $arguments };
139
140
141sub new {
142 my ($class) = shift (@_);
143 my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
144 push(@$pluginlist, $class);
145
146 push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
147 push(@{$hashArgOptLists->{"OptList"}},$options);
148
149
150 my $self = new ReadTextFile($pluginlist,$inputargs,$hashArgOptLists);
151
152 if ($self->{'w3mir'}) {
153 $self->{'file_is_url'} = 1;
154 }
155 $self->{'aux_files'} = {};
156 $self->{'dir_num'} = 0;
157 $self->{'file_num'} = 0;
158
159 return bless $self, $class;
160}
161
162# may want to use (?i)\.(gif|jpe?g|jpe|png|css|js(?:@.*)?)$
163# if have eg <script language="javascript" src="img/lib.js@123">
164# blocking is now done by reading through the file and recording all the
165# images and other files
166sub get_default_block_exp {
167 my $self = shift (@_);
168
169 #return q^(?i)\.(gif|jpe?g|jpe|jpg|png|css)$^;
170 return "";
171}
172
173sub get_default_process_exp {
174 my $self = shift (@_);
175
176 # the last option is an attempt to encode the concept of an html query ...
177 return q^(?i)(\.html?|\.shtml|\.shm|\.asp|\.php\d?|\.cgi|.+\?.+=.*)$^;
178}
179
180sub store_block_files
181{
182 my $self =shift (@_);
183 my ($filename_full_path, $block_hash) = @_;
184
185 my $html_fname = $filename_full_path;
186
187 my ($language, $content_encoding) = $self->textcat_get_language_encoding ($filename_full_path);
188 $self->{'store_content_encoding'}->{$filename_full_path} = [$content_encoding, $language];
189
190
191 # read in file ($text will be in the filesystem encoding)
192 my $raw_text = "";
193 $self->read_file_no_decoding($filename_full_path, \$raw_text);
194
195 my $textref = \$raw_text;
196 my $opencom = '(?:<!--|&lt;!(?:&mdash;|&#151;|--))';
197 my $closecom = '(?:-->|(?:&mdash;|&#151;|--)&gt;)';
198 $$textref =~ s/$opencom(.*?)$closecom//gs;
199
200 # Convert entities to their UTF8 equivalents
201 $$textref =~ s/&(lt|gt|amp|quot|nbsp);/&z$1;/go;
202 $$textref =~ s/&([^;]+);/&ghtml::getcharequiv($1,1,0)/gseo; # on this occassion, want it left as utf8
203 $$textref =~ s/&z(lt|gt|amp|quot|nbsp);/&$1;/go;
204
205 my $attval = "\\\"[^\\\"]+\\\"|[^\\s>]+";
206 my @img_matches = ($$textref =~ m/<img[^>]*?src\s*=\s*($attval)[^>]*>/igs);
207 my @usemap_matches = ($$textref =~ m/<img[^>]*?usemap\s*=\s*($attval)[^>]*>/igs);
208 my @link_matches = ($$textref =~ m/<link[^>]*?href\s*=\s*($attval)[^>]*>/igs);
209 my @embed_matches = ($$textref =~ m/<embed[^>]*?src\s*=\s*($attval)[^>]*>/igs);
210 my @tabbg_matches = ($$textref =~ m/<(?:body|table|tr|td)[^>]*?background\s*=\s*($attval)[^>]*>/igs);
211 my @script_matches = ($$textref =~ m/<script[^>]*?src\s*=\s*($attval)[^>]*>/igs);
212
213 if(!defined $self->{'unicode_to_original_filename'}) {
214 # maps from utf8 converted link name -> original filename referrred to by (possibly URL-encoded) src url
215 $self->{'unicode_to_original_filename'} = {};
216 }
217
218 foreach my $raw_link (@img_matches, @usemap_matches, @link_matches, @embed_matches, @tabbg_matches, @script_matches) {
219
220 # remove quotes from link at start and end if necessary
221 if ($raw_link =~ m/^\"/) {
222 $raw_link =~ s/^\"//;
223 $raw_link =~ s/\"$//;
224 }
225
226 # remove any anchor names, e.g. foo.html#name becomes foo.html
227 # but watch out for any #'s that are part of entities, such as &#x3B1;
228 $raw_link =~ s/([^&])\#.*$/$1/s;
229
230 # some links may just be anchor names
231 next unless ($raw_link =~ /\S+/);
232
233 if ($raw_link !~ m@^/@ && $raw_link !~ m/^([A-Z]:?)\\/i) {
234 # Turn relative file path into full path
235 my $dirname = &File::Basename::dirname($filename_full_path);
236 $raw_link = &FileUtils::filenameConcatenate($dirname, $raw_link);
237 }
238 $raw_link = $self->eval_dir_dots($raw_link);
239
240 # this is the actual filename on the filesystem (that the link refers to)
241 my $url_original_filename = $self->opt_url_decode($raw_link);
242
243 my ($uses_bytecodes,$exceeds_bytecodes) = &unicode::analyze_raw_string($url_original_filename);
244
245 if ($exceeds_bytecodes) {
246 # We have a link to a file name that is more complicated than a raw byte filename
247 # What we do next depends on the operating system we are on
248
249 if ($ENV{'GSDLOS'} =~ /^(linux|solaris)$/i) {
250 # Assume we're dealing with a UTF-8 encoded filename
251 $url_original_filename = encode("utf8", $url_original_filename);
252 }
253 elsif ($ENV{'GSDLOS'} =~ /^darwin$/i) {
254 # HFS+ is UTF8 with decompostion
255 $url_original_filename = encode("utf8", $url_original_filename);
256 $url_original_filename = normalize('D', $url_original_filename); # Normalization Form D (decomposition)
257 }
258 elsif ($ENV{'GSDLOS'} =~ /^windows$/i) {
259 # Don't need to do anything as later code maps Windows
260 # unicode filenames to DOS short filenames when needed
261 }
262 else {
263 my $outhandle = $self->{'outhandle'};
264 print $outhandle "Warning: Unrecognized operating system ", $ENV{'GSDLOS'}, "\n";
265 print $outhandle " in raw file system encoding of: $raw_link\n";
266 print $outhandle " Assuming filesystem is UTF-8 based.\n";
267 $url_original_filename = encode("utf8", $url_original_filename);
268 }
269 }
270
271 # Convert the (currently raw) link into its Unicode version.
272 # Store the Unicode link along with the url_original_filename
273 my $unicode_url_original_filename = "";
274 $self->decode_text($raw_link,$content_encoding,$language,\$unicode_url_original_filename);
275
276
277 $self->{'unicode_to_original_filename'}->{$unicode_url_original_filename} = $url_original_filename;
278
279
280 if ($url_original_filename ne $unicode_url_original_filename) {
281 my $outhandle = $self->{'outhandle'};
282
283 print $outhandle "URL Encoding $url_original_filename\n";
284 print $outhandle " ->$unicode_url_original_filename\n";
285
286 # make sure not to block the file itself, as happens when an html file links to itself
287 # e.g. if the current file is mary-boleyn/index.html and contains <link rel="canonical" href="index.html" />
288 my $unicode_html_fname = "";
289 $self->decode_text($html_fname,$content_encoding,$language,\$unicode_html_fname);
290 if($unicode_url_original_filename ne $unicode_html_fname) {
291 # Allow for possibility of raw byte version and Unicode versions of file
292 $self->block_filename($block_hash,$unicode_url_original_filename);
293 }
294 }
295
296 # $url_original_filename = &util::upgrade_if_dos_filename($url_original_filename);
297 # TODO now use unicode files in block, do we need this??
298 $self->block_raw_filename($block_hash,$url_original_filename) if $url_original_filename ne $html_fname;
299
300 # but only add the linked file to the blocklist if the current html file does not link to itself
301
302 }
303}
304
305# Given a filename in any encoding, will URL decode it to get back the original filename
306# in the original encoding. Because this method is intended to work out the *original*
307# filename*, it does not URL decode any filename if a file by the name of the *URL-encoded*
308# string already exists in the local folder.
309#
310sub opt_url_decode {
311 my $self = shift (@_);
312 my ($raw_link) = @_;
313
314
315 # Replace %XX's in URL with decoded value if required.
316 # Note that the filename may include the %XX in some situations
317
318## if ($raw_link =~ m/\%[A-F0-9]{2}/i) {
319
320 if (($raw_link =~ m/\%[A-F0-9]{2}/i) || ($raw_link =~ m/\&\#x[0-9A-F]+;/i) || ($raw_link =~ m/\&\#[0-9]+;/i)) {
321 if (!-e $raw_link) {
322 $raw_link = &unicode::url_decode($raw_link,1);
323 }
324 }
325
326 return $raw_link;
327}
328
329sub read_into_doc_obj
330{
331 my $self = shift (@_);
332 my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
333
334 my ($filename_full_path, $filename_no_path) = &util::get_full_filenames($base_dir, $file);
335
336 # Lookup content_encoding and language worked out in file_block pass for this file
337 # Store them under the local names they are nice and easy to access
338 $self->{'content_encoding'} = $self->{'store_content_encoding'}->{$filename_full_path}[0];
339 $self->{'language'} = $self->{'store_content_encoding'}->{$filename_full_path}[1];
340
341 # get the input file
342 my $input_filename = $file;
343 my ($tailname, $dirname, $suffix) = &File::Basename::fileparse($input_filename, "\\.[^\\.]+\$");
344 $suffix = lc($suffix);
345 my $tidy_filename;
346 if (($self->{'use_realistic_book'}) || ($self->{'old_style_HDL'}))
347 {
348 # because the document has to be sectionalized set the description tags
349 $self->{'description_tags'} = 1;
350
351 # set the file to be tidied
352 $input_filename = &FileUtils::filenameConcatenate($base_dir,$file) if $base_dir =~ m/\w/;
353
354 # get the tidied file
355 #my $tidy_filename = $self->tmp_tidy_file($input_filename);
356 $tidy_filename = $self->convert_tidy_or_oldHDL_file($input_filename);
357
358 # derive tmp filename from input filename
359 my ($tailname, $dirname, $suffix) = &File::Basename::fileparse($tidy_filename, "\\.[^\\.]+\$");
360
361 # set the new input file and base_dir to be from the tidied file
362 $file = "$tailname$suffix";
363 $base_dir = $dirname;
364 }
365
366 # call the parent read_into_doc_obj
367 my ($process_status,$doc_obj) = $self->SUPER::read_into_doc_obj($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs, $total_count, $gli);
368 if (($self->{'use_realistic_book'}) || ($self->{'old_style_HDL'}))
369 {
370 # now we need to reset the filenames in the doc obj so that the converted filenames are not used
371 my $collect_file = &util::filename_within_collection($filename_full_path);
372 $doc_obj->set_source_filename ($collect_file, $self->{'file_rename_method'});
373 ## set_source_filename does not set the doc_obj source_path which is used in archives dbs for incremental
374 # build. So set it manually.
375 $doc_obj->set_source_path($filename_full_path);
376 my $collect_conv_file = &util::filename_within_collection($tidy_filename);
377 $doc_obj->set_converted_filename($collect_conv_file);
378
379 my $plugin_filename_encoding = $self->{'filename_encoding'};
380 my $filename_encoding = $self->deduce_filename_encoding($file,$metadata,$plugin_filename_encoding);
381 $self->set_Source_metadata($doc_obj, $filename_full_path, $filename_encoding);
382 }
383
384 delete $self->{'store_content_encoding'}->{$filename_full_path};
385 $self->{'content_encoding'} = undef;
386
387 return ($process_status,$doc_obj);
388}
389
390# do plugin specific processing of doc_obj
391sub process {
392 my $self = shift (@_);
393 my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
394 my $outhandle = $self->{'outhandle'};
395
396 if ($ENV{'GSDLOS'} =~ m/^windows/i) {
397 # this makes life so much easier... perl can cope with unix-style '/'s.
398 $base_dir =~ s@(\\)+@/@g;
399 $file =~ s@(\\)+@/@g;
400 }
401
402 my $filename = &FileUtils::filenameConcatenate($base_dir,$file);
403 my $upgraded_base_dir = &util::upgrade_if_dos_filename($base_dir);
404 my $upgraded_filename = &util::upgrade_if_dos_filename($filename);
405
406 if ($ENV{'GSDLOS'} =~ m/^windows/i) {
407 # And again
408 $upgraded_base_dir =~ s@(\\)+@/@g;
409 $upgraded_filename =~ s@(\\)+@/@g;
410
411 # Need to make sure there is a '/' on the end of upgraded_base_dir
412 if (($upgraded_base_dir ne "") && ($upgraded_base_dir !~ m/\/$/)) {
413 $upgraded_base_dir .= "/";
414 }
415 }
416 my $upgraded_file = &util::filename_within_directory($upgraded_filename,$upgraded_base_dir);
417
418 # reset per-doc stuff...
419 $self->{'aux_files'} = {};
420 $self->{'dir_num'} = 0;
421 $self->{'file_num'} = 0;
422
423 # process an HTML file where sections are divided by headings tags (H1, H2 ...)
424 # you can also include metadata in the format (X can be any number)
425 # <hX>Title<!--gsdl-metadata
426 # <Metadata name="name1">value1</Metadata>
427 # ...
428 # <Metadata name="nameN">valueN</Metadata>
429 #--></hX>
430 if ($self->{'sectionalise_using_h_tags'}) {
431 # description_tags should allways be activated because we convert headings to description tags
432 $self->{'description_tags'} = 1;
433
434 my $arrSections = [];
435 $$textref =~ s/<h([0-9]+)[^>]*>(.*?)<\/h[0-9]+>/$self->process_heading($1, $2, $arrSections, $upgraded_file)/isge;
436
437 if (scalar(@$arrSections)) {
438 my $strMetadata = $self->update_section_data($arrSections, -1);
439 if (length($strMetadata)) {
440 $strMetadata = '<!--' . $strMetadata . "\n-->\n</body>";
441 $$textref =~ s/<\/body>/$strMetadata/ig;
442 }
443 }
444 }
445
446 my $cursection = $doc_obj->get_top_section();
447
448 $self->extract_metadata ($textref, $metadata, $doc_obj, $cursection)
449 unless $self->{'no_metadata'} || $self->{'description_tags'};
450
451 # Store URL for page as metadata - this can be used for an
452 # altavista style search interface. The URL won't be valid
453 # unless the file structure contains the domain name (i.e.
454 # like when w3mir is used to download a website).
455
456 # URL metadata (even invalid ones) are used to support internal
457 # links, so even if 'file_is_url' is off, still need to store info
458
459 my ($tailname,$dirname) = &File::Basename::fileparse($upgraded_file);
460
461# my $utf8_file = $self->filename_to_utf8_metadata($file);
462# $utf8_file =~ s/&\#095;/_/g;
463# variable below used to be utf8_file
464
465 my $url_encoded_file = &unicode::raw_filename_to_url_encoded($tailname);
466 my $utf8_url_encoded_file = &unicode::raw_filename_to_utf8_url_encoded($tailname);
467
468 my $web_url = "http://";
469 my $utf8_web_url = "http://";
470
471 if(defined $dirname) { # local directory
472
473 # Check for "ftp" in the domain name of the directory
474 # structure to determine if this URL should be a ftp:// URL
475 # This check is not infallible, but better than omitting the
476 # check, which would cause all files downloaded from ftp sites
477 # via mirroring with wget to have potentially erroneous http:// URLs
478 # assigned in their metadata
479 if ($dirname =~ /^[^\/]*ftp/i)
480 {
481 $web_url = "ftp://";
482 $utf8_web_url = "ftp://";
483 }
484 $dirname = $self->eval_dir_dots($dirname);
485 $dirname .= &util::get_dirsep() if $dirname ne ""; # if there's a directory, it should end on "/"
486
487 # this local directory in import may need to be URL encoded like the file
488 my $url_encoded_dir = &unicode::raw_filename_to_url_encoded($dirname);
489 my $utf8_url_encoded_dir = &unicode::raw_filename_to_utf8_url_encoded($dirname);
490
491 # changed here
492 $web_url = $web_url.$url_encoded_dir.$url_encoded_file;
493 $utf8_web_url = $utf8_web_url.$utf8_url_encoded_dir.$utf8_url_encoded_file;
494 } else {
495 $web_url = $web_url.$url_encoded_file;
496 $utf8_web_url = $utf8_web_url.$utf8_url_encoded_file;
497 }
498 $web_url =~ s/\\/\//g;
499 $utf8_web_url =~ s/\\/\//g;
500
501 if ((defined $ENV{"DEBUG_UNICODE"}) && ($ENV{"DEBUG_UNICODE"})) {
502 print STDERR "*******DEBUG: upgraded_file: $upgraded_file\n";
503 print STDERR "*******DEBUG: adding URL metadata: $utf8_url_encoded_file\n";
504 print STDERR "*******DEBUG: web url: $web_url\n";
505 print STDERR "*******DEBUG: utf8 web url: $utf8_web_url\n";
506 }
507
508
509 $doc_obj->add_utf8_metadata($cursection, "URL", $web_url);
510 $doc_obj->add_utf8_metadata($cursection, "UTF8URL", $utf8_web_url);
511
512 if ($self->{'file_is_url'}) {
513 $doc_obj->add_metadata($cursection, "weblink", "<a href=\"$web_url\">");
514 $doc_obj->add_metadata($cursection, "webicon", "_iconworld_");
515 $doc_obj->add_metadata($cursection, "/weblink", "</a>");
516 }
517
518 if ($self->{'description_tags'}) {
519 # remove the html header - note that doing this here means any
520 # sections defined within the header will be lost (so all <Section>
521 # tags must appear within the body of the HTML)
522 my ($head_keep) = ($$textref =~ m/^(.*?)<body[^>]*>/is);
523
524 $$textref =~ s/^.*?<body[^>]*>//is;
525 $$textref =~ s/(<\/body[^>]*>|<\/html[^>]*>)//isg;
526
527 my $opencom = '(?:<!--|&lt;!(?:&mdash;|&#151;|--))';
528 my $closecom = '(?:-->|(?:&mdash;|&#151;|--)&gt;)';
529
530 my $lt = '(?:<|&lt;)';
531 my $gt = '(?:>|&gt;)';
532 my $quot = '(?:"|&quot;|&rdquo;|&ldquo;)';
533
534 my $dont_strip = '';
535 if ($self->{'no_strip_metadata_html'}) {
536 ($dont_strip = $self->{'no_strip_metadata_html'}) =~ s{,}{|}g;
537 }
538
539 my $found_something = 0; my $top = 1;
540 while ($$textref =~ s/^(.*?)$opencom(.*?)$closecom//s) {
541 my $text = $1;
542 my $comment = $2;
543 if (defined $text) {
544 # text before a comment - note that getting to here
545 # doesn't necessarily mean there are Section tags in
546 # the document
547 $self->process_section(\$text, $upgraded_base_dir, $upgraded_file, $doc_obj, $cursection);
548 }
549 while ($comment =~ s/$lt(.*?)$gt//s) {
550 my $tag = $1;
551 if ($tag eq "Section") {
552 $found_something = 1;
553 $cursection = $doc_obj->insert_section($doc_obj->get_end_child($cursection)) unless $top;
554 $top = 0;
555 } elsif ($tag eq "/Section") {
556 $found_something = 1;
557 $cursection = $doc_obj->get_parent_section ($cursection);
558 } elsif ($tag =~ m/^Metadata name=$quot(.*?)$quot/s) {
559 my $metaname = $1;
560 my $accumulate = $tag =~ m/mode=${quot}accumulate${quot}/ ? 1 : 0;
561 $comment =~ s/^(.*?)$lt\/Metadata$gt//s;
562 my $metavalue = $1;
563 $metavalue =~ s/^\s+//;
564 $metavalue =~ s/\s+$//;
565 # assume that no metadata value intentionally includes
566 # carriage returns or HTML tags (if they're there they
567 # were probably introduced when converting to HTML from
568 # some other format).
569 # actually some people want to have html tags in their
570 # metadata.
571 $metavalue =~ s/[\cJ\cM]/ /sg;
572 $metavalue =~ s/<[^>]+>//sg
573 unless $dont_strip && ($dont_strip eq 'all' || $metaname =~ m/^($dont_strip)$/);
574 $metavalue =~ s/\s+/ /sg;
575 if ($metaname =~ /\./) { # has a namespace
576 $metaname = "ex.$metaname";
577 }
578 if ($accumulate) {
579 $doc_obj->add_utf8_metadata($cursection, $metaname, $metavalue);
580 } else {
581 $doc_obj->set_utf8_metadata_element($cursection, $metaname, $metavalue);
582 }
583 } elsif ($tag eq "Description" || $tag eq "/Description") {
584 # do nothing with containing Description tags
585 } else {
586 # simple HTML tag (probably created by the conversion
587 # to HTML from some other format) - we'll ignore it and
588 # hope for the best ;-)
589 }
590 }
591 }
592 if ($cursection ne "") {
593 print $outhandle "HTMLPlugin: WARNING: $upgraded_file contains unmatched <Section></Section> tags\n";
594 }
595
596 $$textref =~ s/^.*?<body[^>]*>//is;
597 $$textref =~ s/(<\/body[^>]*>|<\/html[^>]*>)//isg;
598 if ($$textref =~ m/\S/) {
599 if (!$found_something) {
600 if ($self->{'verbosity'} > 2) {
601 print $outhandle "HTMLPlugin: WARNING: $upgraded_file appears to contain no Section tags so\n";
602 print $outhandle " will be processed as a single section document\n";
603 }
604
605 # go ahead and process single-section document
606 $self->process_section($textref, $upgraded_base_dir, $upgraded_file, $doc_obj, $cursection);
607
608 # if document contains no Section tags we'll go ahead
609 # and extract metadata (this won't have been done
610 # above as the -description_tags option prevents it)
611 my $complete_text = $head_keep.$doc_obj->get_text($cursection);
612 $self->extract_metadata (\$complete_text, $metadata, $doc_obj, $cursection)
613 unless $self->{'no_metadata'};
614
615 } else {
616 print $outhandle "HTMLPlugin: WARNING: $upgraded_file contains the following text outside\n";
617 print $outhandle " of the final closing </Section> tag. This text will\n";
618 print $outhandle " be ignored.";
619
620 my ($text);
621 if (length($$textref) > 30) {
622 $text = substr($$textref, 0, 30) . "...";
623 } else {
624 $text = $$textref;
625 }
626 $text =~ s/\n/ /isg;
627 print $outhandle " ($text)\n";
628 }
629 } elsif (!$found_something) {
630
631 if ($self->{'verbosity'} > 2) {
632 # may get to here if document contained no valid Section
633 # tags but did contain some comments. The text will have
634 # been processed already but we should print the warning
635 # as above and extract metadata
636 print $outhandle "HTMLPlugin: WARNING: $upgraded_file appears to contain no Section tags and\n";
637 print $outhandle " is blank or empty. Metadata will be assigned if present.\n";
638 }
639
640 my $complete_text = $head_keep.$doc_obj->get_text($cursection);
641 $self->extract_metadata (\$complete_text, $metadata, $doc_obj, $cursection)
642 unless $self->{'no_metadata'};
643 }
644 $self->replace_section_links($doc_obj);
645 } else {
646
647 # remove header and footer
648 if (!$self->{'keep_head'} || $self->{'description_tags'}) {
649 $$textref =~ s/^.*?<body[^>]*>//is;
650 $$textref =~ s/(<\/body[^>]*>|<\/html[^>]*>)//isg;
651 }
652
653 $self->{'css_assoc_files'} = {};
654
655 # single section document
656 $self->process_section($textref, $upgraded_base_dir, $upgraded_file, $doc_obj, $cursection);
657
658 #my $upgraded_filename_dirname = &File::Basename::dirname($upgraded_filename);
659
660 $self->acquire_css_associated_files($doc_obj, $cursection);
661
662 $self->{'css_assoc_files'} = {};
663 }
664
665 return 1;
666}
667
668
669sub process_heading
670{
671 my ($self, $nHeadNo, $strHeadingText, $arrSections, $file) = @_;
672 $strHeadingText = '' if (!defined($strHeadingText));
673
674 my $strMetadata = $self->update_section_data($arrSections, int($nHeadNo));
675
676 my $strSecMetadata = '';
677 while ($strHeadingText =~ s/<!--gsdl-metadata(.*?)-->//is)
678 {
679 $strSecMetadata .= $1;
680 }
681
682 $strHeadingText =~ s/^\s+//g;
683 $strHeadingText =~ s/\s+$//g;
684 $strSecMetadata =~ s/^\s+//g;
685 $strSecMetadata =~ s/\s+$//g;
686
687 $strMetadata .= "\n<Section>\n\t<Description>\n\t\t<Metadata name=\"Title\">" . $strHeadingText . "</Metadata>\n";
688
689 if (length($strSecMetadata)) {
690 $strMetadata .= "\t\t" . $strSecMetadata . "\n";
691 }
692
693 $strMetadata .= "\t</Description>\n";
694
695 return "<!--" . $strMetadata . "-->";
696}
697
698
699sub update_section_data
700{
701 my ($self, $arrSections, $nCurTocNo) = @_;
702 my ($strBuffer, $nLast, $nSections) = ('', 0, scalar(@$arrSections));
703
704 if ($nSections == 0) {
705 push @$arrSections, $nCurTocNo;
706 return $strBuffer;
707 }
708 $nLast = $arrSections->[$nSections - 1];
709 if ($nCurTocNo > $nLast) {
710 push @$arrSections, $nCurTocNo;
711 return $strBuffer;
712 }
713 for(my $i = $nSections - 1; $i >= 0; $i--) {
714 if ($nCurTocNo <= $arrSections->[$i]) {
715 $strBuffer .= "\n</Section>";
716 pop @$arrSections;
717 }
718 }
719 push @$arrSections, $nCurTocNo;
720 return $strBuffer;
721}
722
723
724# note that process_section may be called multiple times for a single
725# section (relying on the fact that add_utf8_text appends the text to any
726# that may exist already).
727sub process_section {
728 my $self = shift (@_);
729 my ($textref, $base_dir, $file, $doc_obj, $cursection) = @_;
730
731 my @styleTagsText = ($$textref =~ m/<style[^>]*>([^<]*)<\/style>/sg);
732 if(scalar(@styleTagsText) > 0)
733 {
734 my $css_filename_dirname = &File::Basename::dirname(&FileUtils::filenameConcatenate($base_dir, $file));
735 foreach my $styleText (@styleTagsText)
736 {
737 $self->acquire_css_associated_files_from_text_block($styleText, $css_filename_dirname);
738 }
739 }
740
741 # trap links
742 if (!$self->{'nolinks'}) {
743 # usemap="./#index" not handled correctly => change to "#index"
744## $$textref =~ s/(<img[^>]*?usemap\s*=\s*[\"\']?)([^\"\'>\s]+)([\"\']?[^>]*>)/
745
746## my $opencom = '(?:<!--|&lt;!(?:&mdash;|&#151;|--))';
747## my $closecom = '(?:-->|(?:&mdash;|&#151;|--)&gt;)';
748
749 $$textref =~ s/(<img[^>]*?usemap\s*=\s*)((?:[\"][^\"]+[\"])|(?:[\'][^\']+[\'])|(?:[^\s\/>]+))([^>]*>)/
750 $self->replace_usemap_links($1, $2, $3)/isge;
751
752 $$textref =~ s/(<(?:a|area|frame|link|script)\s+[^>]*?\s*(?:href|src)\s*=\s*)((?:[\"][^\"]+[\"])|(?:[\'][^\']+[\'])|(?:[^\s\/>]+))([^>]*>)/
753 $self->replace_href_links ($1, $2, $3, $base_dir, $file, $doc_obj, $cursection)/isge;
754
755## $$textref =~ s/($opencom.*?)?+(<(?:a|area|frame|link|script)\s+[^>]*?\s*(?:href|src)\s*=\s*)((?:[\"][^\"]+[\"])|(?:[\'][^\']+[\'])|(?:[^\s\/>]+))([^>]*>)(.*?$closecom)?+/
756# $self->replace_href_links ($1, $2, $3, $4, $5, $base_dir, $file, $doc_obj, $cursection)/isge;
757 }
758
759 # trap images
760
761 # Previously, by default, HTMLPlugin would embed <img> tags inside anchor tags
762 # i.e. <a href="image><img src="image"></a> in order to overcome a problem that
763 # turned regular text succeeding images into links. That is, by embedding <imgs>
764 # inside <a href=""></a>, the text following images were no longer misbehaving.
765 # However, there would be many occasions whereby images were not meant to link
766 # to their source images but where the images would link to another web page.
767 # To allow this, the no_image_links option was introduced: it would prevent
768 # the behaviour of embedding images into links that referenced the source images.
769
770 # Somewhere along the line, the problem of normal text turning into links when
771 # such text followed images which were not embedded in <a href=""></a> ceased
772 # to occur. This is why the following lines have been commented out (as well as
773 # two lines in replace_images). They appear to no longer apply.
774
775 # If at any time, there is a need for having images embedded in <a> anchor tags,
776 # then it might be better to turn that into an HTMLPlugin option rather than make
777 # it the default behaviour. Also, eventually, no_image_links needs to become
778 # a deprecated option for HTMLPlugin as it has now become the default behaviour.
779
780 #if(!$self->{'no_image_links'}){
781 $$textref =~ s/(<(?:img|embed|table|tr|td)[^>]*?(?:src|background)\s*=\s*)((?:[\"][^\"]+[\"])|(?:[\'][^\']+[\'])|(?:[^\s\/>]+))([^>]*>)/
782 $self->replace_images ($1, $2, $3, $base_dir, $file, $doc_obj, $cursection)/isge;
783 #}
784
785 # add text to document object
786 # turn \ into \\ so that the rest of greenstone doesn't think there
787 # is an escape code following. (Macro parsing loses them...)
788 $$textref =~ s/\\/\\\\/go;
789
790 $doc_obj->add_utf8_text($cursection, $$textref);
791}
792
793sub replace_images {
794 my $self = shift (@_);
795 my ($front, $link, $back, $base_dir,
796 $file, $doc_obj, $section) = @_;
797
798 # remove quotes from link at start and end if necessary
799 if ($link=~/^[\"\']/) {
800 $link=~s/^[\"\']//;
801 $link=~s/[\"\']$//;
802 $front.='"';
803 $back="\"$back";
804 }
805
806 $link =~ s/\n/ /g;
807
808 # Hack to overcome Windows wv 0.7.1 bug that causes embedded images to be broken
809 # If the Word file path has spaces in it, wv messes up and you end up with
810 # absolute paths for the images, and without the "file://" prefix
811 # So check for this special case and massage the data to be correct
812 if ($ENV{'GSDLOS'} =~ m/^windows/i && $self->{'plugin_type'} eq "WordPlug" && $link =~ m/^[A-Za-z]\:\\/) {
813 $link =~ s/^.*\\([^\\]+)$/$1/;
814 }
815
816 my ($href, $hash_part, $rl) = $self->format_link ($link, $base_dir, $file);
817
818 my $img_file = $self->add_file ($href, $rl, $hash_part, $base_dir, $doc_obj, $section);
819
820# print STDERR "**** link = $link\n**** href = $href\n**** img_file = $img_file, rl = $rl\n\n";
821
822 my $anchor_name = $img_file;
823 #$anchor_name =~ s/^.*\///;
824 #$anchor_name = "<a name=\"$anchor_name\" ></a>";
825
826 my $image_link = $front . $img_file .$back;
827 return $image_link;
828
829 # The reasons for why the following two lines are no longer necessary can be
830 # found in subroutine process_section
831 #my $anchor_link = "<a href=\"$img_file\" >".$image_link."</a>";
832 #return $anchor_link;
833
834 #return $front . $img_file . $back . $anchor_name;
835}
836
837sub replace_href_links {
838 my $self = shift (@_);
839 my ($front, $link, $back, $base_dir, $file, $doc_obj, $section) = @_;
840
841 if($front =~ m/^<link / && $link =~ m/\.css"$/)
842 {
843 my $actual_link = $link;
844 $actual_link =~ s/^"(.*)"$/$1/;
845
846 my $directory = &File::Basename::dirname($file);
847
848 my $css_filename = &FileUtils::filenameConcatenate($base_dir, $directory, $actual_link);
849 $self->retrieve_css_associated_files($css_filename);
850 }
851
852 # remove quotes from link at start and end if necessary
853 if ($link=~/^[\"\']/) {
854 $link=~s/^[\"\']//;
855 $link=~s/[\"\']$//;
856 $front.='"';
857 $back="\"$back";
858 }
859
860 # can't remember adding this :-( must have had a reason though...
861 if ($link =~ /^\_http/ || $link =~ /^\_libraryname\_/) {
862 # assume it is a greenstone one and leave alone
863 return $front . $link . $back;
864 }
865
866 # attempt to sort out targets - frames are not handled
867 # well in this plugin and some cases will screw things
868 # up - e.g. the _parent target (so we'll just remove
869 # them all ;-)
870 $front =~ s/(target=\"?)_top(\"?)/$1_gsdltop_$2/is;
871 $back =~ s/(target=\"?)_top(\"?)/$1_gsdltop_$2/is;
872 $front =~ s/target=\"?_parent\"?//is;
873 $back =~ s/target=\"?_parent\"?//is;
874
875 if($link =~ m/^\#/s)
876 {
877 return $front . "_httpsamepagelink_" . $link . $back;
878 }
879
880 $link =~ s/\n/ /g;
881
882 # Find file referred to by $link on file system
883 # This is more complicated than it sounds when char encodings
884 # is taken in to account
885 my ($href, $hash_part, $rl) = $self->format_link ($link, $base_dir, $file);
886
887 # href may use '\'s where '/'s should be on Windows
888 $href =~ s/\\/\//g;
889 my ($filename) = $href =~ m/^(?:.*?):(?:\/\/)?(.*)/;
890
891 ##### leave all these links alone (they won't be picked up by intermediate
892 ##### pages). I think that's safest when dealing with frames, targets etc.
893 ##### (at least until I think of a better way to do it). Problems occur with
894 ##### mailto links from within small frames, the intermediate page is displayed
895 ##### within that frame and can't be seen. There is still potential for this to
896 ##### happen even with html pages - the solution seems to be to somehow tell
897 ##### the browser from the server side to display the page being sent (i.e.
898 ##### the intermediate page) in the top level window - I'm not sure if that's
899 ##### possible - the following line should probably be deleted if that can be done
900 return $front . $link . $back if $href =~ m/^(mailto|news|gopher|nntp|telnet|javascript):/is;
901
902 if (($rl == 0) || ($filename =~ m/$self->{'process_exp'}/) ||
903 ($href =~ m/\/$/) || ($href =~ m/^(mailto|news|gopher|nntp|telnet|javascript):/i)) {
904
905 if ($ENV{'GSDLOS'} =~ m/^windows$/) {
906
907 # Don't do any encoding for now, as not clear what
908 # the right thing to do is to support filename
909 # encoding on Windows when they are not UTF16
910 #
911 }
912 else {
913 # => Unix-based system
914
915 # If web page didn't give encoding, then default to utf8
916 my $content_encoding= $self->{'content_encoding'} || "utf8";
917
918 if ((defined $ENV{"DEBUG_UNICODE"}) && ($ENV{"DEBUG_UNICODE"})) {
919 print STDERR "**** Encoding with '$content_encoding', href: $href\n";
920 }
921
922 # on Darwin, the unicode filenames are stored on the file
923 # system in decomposed form, so any href link (including when
924 # URL-encoded) should refer to the decomposed name of the file
925 if ($ENV{'GSDLOS'} =~ /^darwin$/i) {
926 $href = normalize('D', $href); # Normalization Form D (decomposition)
927 }
928
929 $href = encode($content_encoding,$href);
930 }
931
932 $href = &unicode::raw_filename_to_utf8_url_encoded($href);
933 $href = &unicode::filename_to_url($href);
934
935 &ghtml::urlsafe ($href);
936
937 if ((defined $ENV{"DEBUG_UNICODE"}) && ($ENV{"DEBUG_UNICODE"})) {
938 print STDERR "******DEBUG: href=$href\n";
939 }
940
941 #TODO here
942# if ($rl ==1) {
943 # have a relative link, we need to do URL encoding etc so it matches what has happened for that file
944 #$href = &util::rename_file($href, $self->{'file_rename_method'});
945# $href = &unicode::raw_filename_to_url_encoded($href);
946 # then, this might be url encoded, so we replace % with %25
947# $href = &unicode::filename_to_url($href);
948# print STDERR "DEBUG: url encoded href = $href\n";
949# }
950
951 return $front . "_httpextlink_&amp;rl=" . $rl . "&amp;href=" . $href . $hash_part . $back;
952 } else {
953 # link is to some other type of file (e.g., an image) so we'll
954 # need to associate that file
955 return $front . $self->add_file ($href, $rl, $hash_part, $base_dir, $doc_obj, $section) . $back;
956 }
957}
958
959sub retrieve_css_associated_files {
960 my $self = shift (@_);
961 my ($css_filename) = @_;
962
963 my $css_filename_dirname = &File::Basename::dirname($css_filename);
964
965 # The following file reading section is a candidate to use FileUtils::readUTF8File()
966 # in place of calling sysread() directly. But only if we can reason we'd be working with UTF8
967 open (CSSFILE, $css_filename) || return;
968 sysread (CSSFILE, my $file_string, -s CSSFILE);
969
970 $self->acquire_css_associated_files_from_text_block($file_string, $css_filename_dirname) unless !defined $file_string;
971
972 close CSSFILE;
973}
974
975sub acquire_css_associated_files_from_text_block {
976 my $self = shift (@_);
977 my ($text, $css_filename_dirname) = @_;
978
979 my @image_urls = ($text =~ m/background-image:\s*url[^;]*;/sg);
980 foreach my $img_url (@image_urls)
981 {
982 $img_url =~ s/^.*url.*\((.*)\).*$/$1/;
983 $img_url =~ s/^\s*"?([^"]*)"?\s*$/$1/;
984
985 $self->{'css_assoc_files'}->{&FileUtils::filenameConcatenate($css_filename_dirname, $img_url)} = $img_url;
986 }
987}
988
989sub acquire_css_associated_files {
990 my $self = shift(@_);
991
992 my ($doc_obj, $section) = @_;
993
994 foreach my $image_filename (keys %{$self->{'css_assoc_files'}})
995 {
996 $doc_obj->associate_file($image_filename, $self->{'css_assoc_files'}->{$image_filename}, undef, $section);
997 }
998}
999
1000sub add_file {
1001 my $self = shift (@_);
1002 my ($href, $rl, $hash_part, $base_dir, $doc_obj, $section) = @_;
1003 my ($newname);
1004
1005 my $filename = $href;
1006 if ($base_dir eq "") {
1007 if ($ENV{'GSDLOS'} =~ m/^windows$/i) {
1008 # remove http://
1009 $filename =~ s/^[^:]*:\/\///;
1010 }
1011 else {
1012 # remove http:/ thereby leaving one slash at the start as
1013 # part of full pathname
1014 $filename =~ s/^[^:]*:\///;
1015 }
1016 }
1017 else {
1018 # remove http://
1019 $filename =~ s/^[^:]*:\/\///;
1020 }
1021
1022 if ($ENV{'GSDLOS'} =~ m/^windows$/i) {
1023 $filename =~ s@\/@\\@g;
1024 }
1025
1026 $filename = &FileUtils::filenameConcatenate($base_dir, $filename);
1027
1028 if (($self->{'use_realistic_book'}) || ($self->{'old_style_HDL'})) {
1029 # we are processing a tidytmp file - want paths to be in import
1030 $filename =~ s/([\\\/])tidytmp([\\\/])/$1import$2/;
1031 }
1032
1033 # Replace %XX's in URL with decoded value if required. Note that the
1034 # filename may include the %XX in some situations. If the *original*
1035 # file's name was in URL encoding, the following method will not decode
1036 # it.
1037 my $unicode_filename = $filename;
1038 my $opt_decode_unicode_filename = $self->opt_url_decode($unicode_filename);
1039
1040 # wvWare can generate <img src="StrangeNoGraphicData"> tags, but with no
1041 # (it seems) accompanying file
1042 if ($opt_decode_unicode_filename =~ m/StrangeNoGraphicData$/) { return ""; }
1043
1044 my $content_encoding= $self->{'content_encoding'} || "utf8";
1045
1046 if ($ENV{'GSDLOS'} =~ /^(linux|solaris)$/i) {
1047 # The filenames that come through the HTML file have been decoded
1048 # into Unicode aware Perl strings. Need to convert them back
1049 # to their initial raw-byte encoding to match the file that
1050 # exists on the file system
1051 $filename = encode($content_encoding, $opt_decode_unicode_filename);
1052
1053 }
1054 elsif ($ENV{'GSDLOS'} =~ /^darwin$/i) {
1055 # HFS+ is UTF8 with decompostion
1056 $filename = encode($content_encoding, $opt_decode_unicode_filename);
1057 $filename = normalize('D', $filename); # Normalization Form D (decomposition)
1058
1059 }
1060 elsif ($ENV{'GSDLOS'} =~ /^windows$/i) {
1061 my $long_filename = Win32::GetLongPathName($opt_decode_unicode_filename);
1062
1063 if (defined $long_filename) {
1064 my $short_filename = Win32::GetLongPathName($long_filename);
1065 $filename = $short_filename;
1066 }
1067# else {
1068# print STDERR "***** failed to map href to real file:\n";
1069# print STDERR "****** $href -> $opt_decode_unicode_filename\n";
1070# }
1071 }
1072 else {
1073 my $outhandle = $self->{'outhandle'};
1074 print $outhandle "Warning: Unrecognized operating system ", $ENV{'GSDLOS'}, "\n";
1075 print $outhandle " in file system encoding of href: $href\n";
1076 print $outhandle " No character encoding done.\n";
1077 }
1078
1079
1080 # some special processing if the intended filename was converted to utf8, but
1081 # the actual file still needs to be renamed
1082 if (!&FileUtils::fileExists($filename)) {
1083 # try the original filename stored in map
1084 if ((defined $ENV{"DEBUG_UNICODE"}) && ($ENV{"DEBUG_UNICODE"})) {
1085 print STDERR "******!! orig filename did not exist: $filename\n";
1086 }
1087
1088## print STDERR "**** trying to look up unicode_filename: $unicode_filename\n";
1089
1090 my $original_filename = $self->{'unicode_to_original_filename'}->{$unicode_filename};
1091
1092 if ((defined $ENV{"DEBUG_UNICODE"}) && ($ENV{"DEBUG_UNICODE"})) {
1093 print STDERR "****** From lookup unicode_filename, now trying for: $original_filename\n";
1094 }
1095
1096 if (defined $original_filename && -e $original_filename) {
1097 if ((defined $ENV{"DEBUG_UNICODE"}) && ($ENV{"DEBUG_UNICODE"})) {
1098 print STDERR "****** Found match!\n";
1099 }
1100 $filename = $original_filename;
1101 }
1102 }
1103
1104 my ($ext) = $filename =~ m/(\.[^\.]*)$/;
1105
1106 if ($rl == 0) {
1107 if ((!defined $ext) || ($ext !~ m/$self->{'assoc_files'}/)) {
1108 return "_httpextlink_&amp;rl=0&amp;el=prompt&amp;href=" . $href . $hash_part;
1109 }
1110 else {
1111 return "_httpextlink_&amp;rl=0&amp;el=direct&amp;href=" . $href . $hash_part;
1112 }
1113 }
1114
1115 if ((!defined $ext) || ($ext !~ m/$self->{'assoc_files'}/)) {
1116 return "_httpextlink_&amp;rl=" . $rl . "&amp;href=" . $href . $hash_part;
1117 }
1118 # add the original image file as a source file
1119 if (!$self->{'processing_tmp_files'} ) {
1120 $doc_obj->associate_source_file($filename);
1121 }
1122 if ($self->{'rename_assoc_files'}) {
1123 if (defined $self->{'aux_files'}->{$href}) {
1124 $newname = $self->{'aux_files'}->{$href}->{'dir_num'} . "/" .
1125 $self->{'aux_files'}->{$href}->{'file_num'} . $ext;
1126 } else {
1127 $newname = $self->{'dir_num'} . "/" . $self->{'file_num'} . $ext;
1128 $self->{'aux_files'}->{$href} = {'dir_num' => $self->{'dir_num'}, 'file_num' => $self->{'file_num'}};
1129 $self->inc_filecount ();
1130 }
1131 $doc_obj->associate_file($filename, $newname, undef, $section);
1132 return "_httpdocimg_/$newname";
1133 } else {
1134 if(&unicode::is_url_encoded($unicode_filename)) {
1135 # use the possibly-decoded filename instead to avoid double URL encoding
1136 ($newname) = $filename =~ m/([^\/\\]*)$/;
1137 } else {
1138 ($newname) = $unicode_filename =~ m/([^\/\\]*)$/;
1139 }
1140
1141 # Make sure this name uses only ASCII characters.
1142 # We use either base64 or URL encoding, as these preserve original encoding
1143 $newname = &util::rename_file($newname, $self->{'file_rename_method'});
1144
1145### print STDERR "***** associating $filename (raw-byte/utf8)-> $newname\n";
1146 $doc_obj->associate_file($filename, $newname, undef, $section);
1147
1148 # Since the generated image will be URL-encoded to avoid file-system/browser mess-ups
1149 # of filenames, URL-encode the additional percent signs of the URL-encoded filename
1150 my $newname_url = $newname;
1151 $newname_url = &unicode::filename_to_url($newname_url);
1152 return "_httpdocimg_/$newname_url";
1153 }
1154}
1155
1156sub replace_section_links {
1157 my $self = shift(@_);
1158 my ($doc_obj) = @_;
1159 my %anchors;
1160 my $top_section = $doc_obj->get_top_section();
1161 my $thissection = $doc_obj->get_next_section($top_section);
1162 while ( defined $thissection ) {
1163 my $text = $doc_obj->get_text($thissection);
1164 while ( $text =~ /(?:(?:id|name)\s*=\s*[\'\"])([^\'\"]+)/gi ) {
1165 $anchors{$1} = $thissection;
1166 }
1167 $thissection = $doc_obj->get_next_section($thissection);
1168 }
1169 $thissection = $top_section;
1170 while (defined $thissection) {
1171 my $text = $doc_obj->get_text($thissection);
1172 $text =~ s/(href\s*=\s*[\"\'])(_httpsamepagelink_#)([^\'\"]+)/$self->replace_link_to_anchor($1,$2,$3,$thissection,$anchors{$3})/ige;
1173 $doc_obj->delete_text( $thissection);
1174 $doc_obj->add_utf8_text( $thissection, $text );
1175 $thissection = $doc_obj->get_next_section ($thissection);
1176 }
1177}
1178sub replace_link_to_anchor {
1179 my $self = shift(@_);
1180 my ($href_part,$old_link,$identifier,$current_section,$target_section) = @_;
1181 if (length $target_section){
1182 return $href_part . "javascript:goToAnchor(\'" . $target_section . "\',\'" . $identifier . "\');" ;
1183 }
1184 return $href_part . $old_link . $identifier ;
1185}
1186
1187sub format_link {
1188 my $self = shift (@_);
1189 my ($link, $base_dir, $file) = @_;
1190
1191 # strip off hash part, e.g. #foo, but watch out for any entities, e.g. &#x3B1;
1192 my ($before_hash, $hash_part) = $link =~ m/^(.*?[^&])(\#.*)?$/;
1193
1194 $hash_part = "" if !defined $hash_part;
1195 if (!defined $before_hash || $before_hash !~ m/[\w\.\/]/) {
1196 my $outhandle = $self->{'outhandle'};
1197 print $outhandle "HTMLPlugin: ERROR - badly formatted tag ignored ($link)\n"
1198 if $self->{'verbosity'};
1199 return ($link, "", 0);
1200 }
1201
1202# my $dirname;
1203 if ($before_hash =~ s@^((?:http|https|ftp|file|mms)://)@@i) {
1204 my $type = $1;
1205 my $before_hash_file = $before_hash;
1206
1207 if ($link =~ m/^(http|ftp):/i) {
1208
1209 # Turn url (using /) into file name (possibly using \ on windows)
1210 my @http_dir_split = split('/', $before_hash_file);
1211 $before_hash_file = &FileUtils::filenameConcatenate(@http_dir_split);
1212 }
1213
1214 # want to maintain two version of "before_hash": one representing the URL, the other using filesystem specific directory separator
1215 $before_hash_file = $self->eval_dir_dots($before_hash_file);
1216 my $before_hash_url = $before_hash_file;
1217 if ($ENV{'GSDLOS'} =~ /^windows$/i) {
1218 $before_hash_url =~ s@\\@\/@g;
1219 }
1220
1221 ######## TODO need to check this for encoding stufff
1222 my $linkfilename = &FileUtils::filenameConcatenate($base_dir, $before_hash_file);
1223 print STDERR "checking for existence whether relative link or not $linkfilename\n";
1224 my $rl = 0;
1225 $rl = 1 if (-e $linkfilename);
1226 if (-e $linkfilename) {
1227
1228 print STDERR "DOES exist $linkfilename\n";
1229 } else {
1230 print STDERR "DOESN'T exist $linkfilename\n";
1231 }
1232 # make sure there's a slash on the end if it's a directory
1233 if ($before_hash_url !~ m/\/$/) {
1234 $before_hash_url .= "/" if (-d $linkfilename);
1235 }
1236 return ($type . $before_hash_url, $hash_part, $rl);
1237
1238 } elsif ($link !~ m/^(mailto|news|gopher|nntp|telnet|javascript):/i && $link !~ m/^\//) {
1239
1240 #### TODO whst is this test doing???
1241 if ($before_hash =~ s@^/@@ || $before_hash =~ m/\\/) {
1242
1243 # the first directory will be the domain name if file_is_url
1244 # to generate archives, otherwise we'll assume all files are
1245 # from the same site and base_dir is the root
1246
1247 if ($self->{'file_is_url'}) {
1248 my @dirs = split /[\/\\]/, $file;
1249 my $domname = shift (@dirs);
1250 $before_hash = &FileUtils::filenameConcatenate($domname, $before_hash);
1251 $before_hash =~ s@\\@/@g; # for windows
1252 }
1253 else
1254 {
1255 # see if link shares directory with source document
1256 # => turn into relative link if this is so!
1257
1258 if ($ENV{'GSDLOS'} =~ m/^windows/i) {
1259 # too difficult doing a pattern match with embedded '\'s...
1260 my $win_before_hash=$before_hash;
1261 $win_before_hash =~ s@(\\)+@/@g;
1262 # $base_dir is already similarly "converted" on windows.
1263 if ($win_before_hash =~ s@^$base_dir/@@o) {
1264 # if this is true, we removed a prefix
1265 $before_hash=$win_before_hash;
1266 }
1267 }
1268 else {
1269 # before_hash has lost leading slash by this point,
1270 # -> add back in prior to substitution with $base_dir
1271 $before_hash = "/$before_hash";
1272
1273 $before_hash = &FileUtils::filenameConcatenate("",$before_hash);
1274 $before_hash =~ s@^$base_dir/@@;
1275 }
1276 }
1277 } else {
1278
1279 # Turn relative file path into full path (inside import dir)
1280 my $dirname = &File::Basename::dirname($file);
1281
1282 # we want to add dirname (which is raw filesystem path) onto $before_hash, (which is perl unicode aware string). Convert dirname to perl string
1283
1284 my $unicode_dirname ="";
1285 # we need to turn raw filesystem filename into perl unicode aware string
1286 my $filename_encoding = $self->guess_filesystem_encoding();
1287
1288 # copied this from set_Source_metadata in BaseImporter
1289 if ((defined $filename_encoding) && ($filename_encoding ne "ascii")) {
1290 # Use filename_encoding to map raw filename to a Perl unicode-aware string
1291 $unicode_dirname = decode($filename_encoding,$dirname);
1292 }
1293 else {
1294 # otherwise generate %xx encoded version of filename for char > 127
1295 $unicode_dirname = &unicode::raw_filename_to_url_encoded($dirname);
1296 }
1297 $before_hash = &FileUtils::filenameConcatenate($unicode_dirname, $before_hash);
1298 $before_hash = $self->eval_dir_dots($before_hash);
1299 $before_hash =~ s@\\@/@g; # for windows
1300 }
1301
1302 my $linkfilename = &FileUtils::filenameConcatenate($base_dir, $before_hash);
1303
1304 # make sure there's a slash on the end if it's a directory
1305 if ($before_hash !~ m/\/$/) {
1306 $before_hash .= "/" if (-d $linkfilename);
1307 }
1308 return ("http://" . $before_hash, $hash_part, 1);
1309 } else {
1310 # mailto, news, nntp, telnet, javascript or gopher link
1311 return ($before_hash, "", 0);
1312 }
1313}
1314
1315sub extract_first_NNNN_characters {
1316 my $self = shift (@_);
1317 my ($textref, $doc_obj, $thissection) = @_;
1318
1319 foreach my $size (split /,/, $self->{'first'}) {
1320 my $tmptext = $$textref;
1321 # skip to the body
1322 $tmptext =~ s/.*<body[^>]*>//i;
1323 # remove javascript
1324 $tmptext =~ s@<script.*?</script>@ @sig;
1325 $tmptext =~ s/<[^>]*>/ /g;
1326 $tmptext =~ s/&nbsp;/ /g;
1327 $tmptext =~ s/^\s+//;
1328 $tmptext =~ s/\s+$//;
1329 $tmptext =~ s/\s+/ /gs;
1330 $tmptext = &unicode::substr ($tmptext, 0, $size);
1331 $tmptext =~ s/\s\S*$/&#8230;/; # adds an ellipse (...)
1332 $doc_obj->add_utf8_metadata ($thissection, "First$size", $tmptext);
1333 }
1334}
1335
1336
1337sub extract_metadata {
1338 my $self = shift (@_);
1339 my ($textref, $metadata, $doc_obj, $section) = @_;
1340 my $outhandle = $self->{'outhandle'};
1341 # if we don't want metadata, we may as well not be here ...
1342 return if (!defined $self->{'metadata_fields'});
1343 my $separator = $self->{'metadata_field_separator'};
1344 if ($separator eq "") {
1345 undef $separator;
1346 }
1347
1348 # metadata fields to extract/save. 'key' is the (lowercase) name of the
1349 # html meta, 'value' is the metadata name for greenstone to use
1350 my %find_fields = ();
1351
1352 my %creator_fields = (); # short-cut for lookups
1353
1354
1355 foreach my $field (split /,/, $self->{'metadata_fields'}) {
1356 $field =~ s/^\s+//; # remove leading whitespace
1357 $field =~ s/\s+$//; # remove trailing whitespace
1358
1359 # support tag<tagname>
1360 if ($field =~ m/^(.*?)\s*<(.*?)>$/) {
1361 # "$2" is the user's preferred gs metadata name
1362 $find_fields{lc($1)}=$2; # lc = lowercase
1363 } else { # no <tagname> for mapping
1364 # "$field" is the user's preferred gs metadata name
1365 $find_fields{lc($field)}=$field; # lc = lowercase
1366 }
1367 }
1368
1369 if (defined $self->{'hunt_creator_metadata'} &&
1370 $self->{'hunt_creator_metadata'} == 1 ) {
1371 my @extra_fields =
1372 (
1373 'author',
1374 'author.email',
1375 'creator',
1376 'dc.creator',
1377 'dc.creator.corporatename',
1378 );
1379
1380 # add the creator_metadata fields to search for
1381 foreach my $field (@extra_fields) {
1382 $creator_fields{$field}=0; # add to lookup hash
1383 }
1384 }
1385
1386
1387 # find the header in the html file, which has the meta tags
1388 $$textref =~ m@<head>(.*?)</head>@si;
1389
1390 my $html_header=$1;
1391
1392 # go through every <meta... tag defined in the html and see if it is
1393 # one of the tags we want to match.
1394
1395 # special case for title - we want to remember if its been found
1396 my $found_title = 0;
1397 # this assumes that ">" won't appear. (I don't think it's allowed to...)
1398 $html_header =~ m/^/; # match the start of the string, for \G assertion
1399
1400 while ($html_header =~ m/\G.*?<meta(.*?)>/sig) {
1401 my $metatag=$1;
1402 my ($tag, $value);
1403
1404 # find the tag name
1405 $metatag =~ m/(?:name|http-equiv)\s*=\s*([\"\'])?(.*?)\1/is;
1406 $tag=$2;
1407 # in case they're not using " or ', but they should...
1408 if (! $tag) {
1409 $metatag =~ m/(?:name|http-equiv)\s*=\s*([^\s\>]+)/is;
1410 $tag=$1;
1411 }
1412
1413 if (!defined $tag) {
1414 print $outhandle "HTMLPlugin: can't find NAME in \"$metatag\"\n";
1415 next;
1416 }
1417
1418 # don't need to assign this field if it was passed in from a previous
1419 # (recursive) plugin
1420 if (defined $metadata->{$tag}) {next}
1421
1422 # find the tag content
1423 $metatag =~ m/content\s*=\s*([\"\'])?(.*?)\1/is;
1424 $value=$2;
1425
1426 # The following code assigns the metaname to value if value is
1427 # empty. Why would we do this?
1428 #if (! $value) {
1429 # $metatag =~ m/(?:name|http-equiv)\s*=\s*([^\s\>]+)/is;
1430 # $value=$1;
1431 #}
1432 if (!defined $value || $value eq "") {
1433 print $outhandle "HTMLPlugin: can't find VALUE in <meta $metatag >\n" if ($self->{'verbosity'} > 2);
1434 next;
1435 }
1436
1437 # clean up and add
1438 $value =~ s/\s+/ /gs;
1439 chomp($value); # remove trailing \n, if any
1440 if (exists $creator_fields{lc($tag)}) {
1441 # map this value onto greenstone's "Creator" metadata
1442 $tag='Creator';
1443 } elsif (!exists $find_fields{lc($tag)}) {
1444 next; # don't want this tag
1445 } else {
1446 # get the user's preferred capitalisation
1447 $tag = $find_fields{lc($tag)};
1448 }
1449 if (lc($tag) eq "title") {
1450 $found_title = 1;
1451 }
1452
1453 if ($self->{'verbosity'} > 2) {
1454 print $outhandle " extracted \"$tag\" metadata \"$value\"\n";
1455 }
1456
1457 if ($tag =~ /\./) {
1458 # there is a . so has a namespace, add ex.
1459 $tag = "ex.$tag";
1460 }
1461 if (defined $separator) {
1462 my @values = split($separator, $value);
1463 foreach my $v (@values) {
1464 $doc_obj->add_utf8_metadata($section, $tag, $v) if $v =~ /\S/;
1465 }
1466 }
1467 else {
1468 $doc_obj->add_utf8_metadata($section, $tag, $value);
1469 }
1470 }
1471
1472 # TITLE: extract the document title
1473 if (exists $find_fields{'title'} && !$found_title) {
1474 # we want a title, and didn't find one in the meta tags
1475 # see if there's a <title> tag
1476 my $title;
1477 my $from = ""; # for debugging output only
1478 if ($html_header =~ m/<title[^>]*>([^<]+)<\/title[^>]*>/is) {
1479 $title = $1;
1480 $from = "<title> tags";
1481 }
1482
1483 if (!defined $title) {
1484 $from = "first 100 chars";
1485 # if no title use first 100 or so characters
1486 $title = $$textref;
1487 $title =~ s/^\xFE\xFF//; # Remove unicode byte order mark
1488 $title =~ s/^.*?<body>//si;
1489 # ignore javascript!
1490 $title =~ s@<script.*?</script>@ @sig;
1491 $title =~ s/<\/([^>]+)><\1>//g; # (eg) </b><b> - no space
1492 $title =~ s/<[^>]*>/ /g; # remove all HTML tags
1493 $title =~ s@\r@@g; # remove Windows carriage returns to ensure that titles of pdftohtml docs are consistent (the same 100 chars) across windows and linux
1494 $title = substr ($title, 0, 100);
1495 $title =~ s/\s\S*$/.../;
1496 }
1497 $title =~ s/<[^>]*>/ /g; # remove html tags
1498 $title =~ s/&nbsp;/ /g;
1499 $title =~ s/(?:&nbsp;|\xc2\xa0)/ /g; # utf-8 for nbsp...
1500 $title =~ s/\s+/ /gs; # collapse multiple spaces
1501 $title =~ s/^\s*//; # remove leading spaces
1502 $title =~ s/\s*$//; # remove trailing spaces
1503
1504 $title =~ s/^$self->{'title_sub'}// if ($self->{'title_sub'});
1505 $title =~ s/^\s+//s; # in case title_sub introduced any...
1506 $doc_obj->add_utf8_metadata ($section, "Title", $title);
1507 print $outhandle " extracted Title metadata \"$title\" from $from\n"
1508 if ($self->{'verbosity'} > 2);
1509 }
1510
1511 # add FileFormat metadata
1512 $doc_obj->add_metadata($section,"FileFormat", "HTML");
1513
1514 # Special, for metadata names such as tagH1 - extracts
1515 # the text between the first <H1> and </H1> tags into "H1" metadata.
1516
1517 foreach my $field (keys %find_fields) {
1518 if ($field !~ m/^tag([a-z0-9]+)$/i) {next}
1519 my $tag = $1;
1520 if ($$textref =~ m@<$tag[^>]*>(.*?)</$tag[^>]*>@g) {
1521 my $content = $1;
1522 $content =~ s/&nbsp;/ /g;
1523 $content =~ s/<[^>]*>/ /g;
1524 $content =~ s/^\s+//;
1525 $content =~ s/\s+$//;
1526 $content =~ s/\s+/ /gs;
1527 if ($content) {
1528 $tag=$find_fields{"tag$tag"}; # get the user's capitalisation
1529 $tag =~ s/^tag//i;
1530 $doc_obj->add_utf8_metadata ($section, $tag, $content);
1531 print $outhandle " extracted \"$tag\" metadata \"$content\"\n"
1532 if ($self->{'verbosity'} > 2);
1533 }
1534 }
1535 }
1536}
1537
1538
1539# evaluate any "../" to next directory up
1540# evaluate any "./" as here
1541sub eval_dir_dots {
1542 my $self = shift (@_);
1543 my ($filename) = @_;
1544 my $dirsep_os = &util::get_os_dirsep();
1545 my @dirsep = split(/$dirsep_os/,$filename);
1546
1547 my @eval_dirs = ();
1548 foreach my $d (@dirsep) {
1549 if ($d eq "..") {
1550 pop(@eval_dirs);
1551
1552 } elsif ($d eq ".") {
1553 # do nothing!
1554
1555 } else {
1556 push(@eval_dirs,$d);
1557 }
1558 }
1559
1560 # Need to fiddle with number of elements in @eval_dirs if the
1561 # first one is the empty string. This is because of a
1562 # modification to FileUtils::filenameConcatenate that supresses the addition
1563 # of a leading '/' character (or \ if windows) (intended to help
1564 # filename cat with relative paths) if the first entry in the
1565 # array is the empty string. Making the array start with *two*
1566 # empty strings is a way to defeat this "smart" option.
1567 #
1568 if (scalar(@eval_dirs) > 0) {
1569 if ($eval_dirs[0] eq ""){
1570 unshift(@eval_dirs,"");
1571 }
1572 }
1573
1574 my $evaluated_filename = (scalar @eval_dirs > 0) ? &FileUtils::filenameConcatenate(@eval_dirs) : "";
1575 return $evaluated_filename;
1576}
1577
1578sub replace_usemap_links {
1579 my $self = shift (@_);
1580 my ($front, $link, $back) = @_;
1581
1582 # remove quotes from link at start and end if necessary
1583 if ($link=~/^[\"\']/) {
1584 $link=~s/^[\"\']//;
1585 $link=~s/[\"\']$//;
1586 $front.='"';
1587 $back="\"$back";
1588 }
1589
1590 $link =~ s/^\.\///;
1591 return $front . $link . $back;
1592}
1593
1594sub inc_filecount {
1595 my $self = shift (@_);
1596
1597 if ($self->{'file_num'} == 1000) {
1598 $self->{'dir_num'} ++;
1599 $self->{'file_num'} = 0;
1600 } else {
1601 $self->{'file_num'} ++;
1602 }
1603}
1604
1605
1606# Extend read_file so that strings like &eacute; are
1607# converted to UTF8 internally.
1608#
1609# We don't convert &lt; or &gt; or &amp; or &quot; in case
1610# they interfere with the GML files
1611
1612sub read_file {
1613 my $self = shift(@_);
1614 my ($filename, $encoding, $language, $textref) = @_;
1615
1616 $self->SUPER::read_file($filename, $encoding, $language, $textref);
1617
1618 # Convert entities to their Unicode code-point equivalents
1619 $$textref =~ s/&(lt|gt|amp|quot|nbsp);/&z$1;/go;
1620 $$textref =~ s/&([^;]+);/&ghtml::getcharequiv($1,1,1)/gseo;
1621 $$textref =~ s/&z(lt|gt|amp|quot|nbsp);/&$1;/go;
1622
1623}
1624
1625sub HB_read_html_file {
1626 my $self = shift (@_);
1627 my ($htmlfile, $text) = @_;
1628
1629 # load in the file
1630 if (!open (FILE, $htmlfile)) {
1631 print STDERR "ERROR - could not open $htmlfile\n";
1632 return;
1633 }
1634
1635 my $foundbody = 0;
1636 $self->HB_gettext (\$foundbody, $text, "FILE");
1637 close FILE;
1638
1639 # just in case there was no <body> tag
1640 if (!$foundbody) {
1641 $foundbody = 1;
1642 open (FILE, $htmlfile) || return;
1643 $self->HB_gettext (\$foundbody, $text, "FILE");
1644 close FILE;
1645 }
1646 # text is in utf8
1647}
1648
1649# converts the text to utf8, as ghtml does that for &eacute; etc.
1650sub HB_gettext {
1651 my $self = shift (@_);
1652 my ($foundbody, $text, $handle) = @_;
1653
1654 my $line = "";
1655 while (defined ($line = <$handle>)) {
1656 # look for body tag
1657 if (!$$foundbody) {
1658 if ($line =~ s/^.*<body[^>]*>//i) {
1659 $$foundbody = 1;
1660 } else {
1661 next;
1662 }
1663 }
1664
1665 # check for symbol fonts
1666 if ($line =~ m/<font [^>]*?face\s*=\s*\"?(\w+)\"?/i) {
1667 my $font = $1;
1668 print STDERR "HBPlug::HB_gettext - warning removed font $font\n"
1669 if ($font !~ m/^arial$/i);
1670 }
1671
1672 $$text .= $line;
1673 }
1674
1675 if ($self->{'input_encoding'} eq "iso_8859_1") {
1676 # convert to utf-8
1677 $$text=&unicode::unicode2utf8(&unicode::convert2unicode("iso_8859_1", $text));
1678 }
1679 # convert any alphanumeric character entities to their utf-8
1680 # equivalent for indexing purposes
1681 #&ghtml::convertcharentities ($$text);
1682
1683 $$text =~ s/\s+/ /g; # remove \n's
1684
1685 # At this point $$text is a binary byte string
1686 # => turn it into a Unicode aware string, so full
1687 # Unicode aware pattern matching can be used.
1688 # For instance: 's/\x{0101}//g' or '[[:upper:]]'
1689 #
1690
1691 $$text = decode("utf8",$$text);
1692}
1693
1694sub HB_clean_section {
1695 my $self = shift (@_);
1696 my ($section) = @_;
1697
1698 # remove tags without a starting tag from the section
1699 my ($tag, $tagstart);
1700 while ($section =~ m/<\/([^>]{1,10})>/) {
1701 $tag = $1;
1702 $tagstart = index($section, "<$tag");
1703 last if (($tagstart >= 0) && ($tagstart < index($section, "<\/$tag")));
1704 $section =~ s/<\/$tag>//;
1705 }
1706
1707 # remove extra paragraph tags
1708 while ($section =~ s/<p\b[^>]*>\s*<p\b/<p/ig) {}
1709
1710 # remove extra stuff at the end of the section
1711 while ($section =~ s/(<u>|<i>|<b>|<p\b[^>]*>|&nbsp;|\s)$//i) {}
1712
1713 # add a newline at the beginning of each paragraph
1714 $section =~ s/(.)\s*<p\b/$1\n\n<p/gi;
1715
1716 # add a newline every 80 characters at a word boundary
1717 # Note: this regular expression puts a line feed before
1718 # the last word in each section, even when it is not
1719 # needed.
1720 $section =~ s/(.{1,80})\s/$1\n/g;
1721
1722 # fix up the image links
1723 $section =~ s/<img[^>]*?src=\"?([^\">]+)\"?[^>]*>/
1724 <center><img src=\"$1\" \/><\/center><br\/>/ig;
1725 $section =~ s/&lt;&lt;I&gt;&gt;\s*([^\.]+\.(png|jpg|gif))/
1726 <center><img src=\"$1\" \/><\/center><br\/>/ig;
1727
1728 return $section;
1729}
1730
1731# Will convert the oldHDL format to the new HDL format (using the Section tag)
1732sub convert_to_newHDLformat
1733{
1734 my $self = shift (@_);
1735 my ($file,$cnfile) = @_;
1736 my $input_filename = $file;
1737 my $tmp_filename = $cnfile;
1738
1739 # write HTML tmp file with new HDL format
1740 open (PROD, ">$tmp_filename") || die("Error Writing to File: $tmp_filename $!");
1741
1742 # read in the file and do basic html cleaning (removing header etc)
1743 my $html = "";
1744 $self->HB_read_html_file ($input_filename, \$html);
1745
1746 # process the file one section at a time
1747 my $curtoclevel = 1;
1748 my $firstsection = 1;
1749 my $toclevel = 0;
1750 while (length ($html) > 0) {
1751 if ($html =~ s/^.*?(?:<p\b[^>]*>)?((<b>|<i>|<u>|\s)*)&lt;&lt;TOC(\d+)&gt;&gt;\s*(.*?)<p\b/<p/i) {
1752 $toclevel = $3;
1753 my $title = $4;
1754 my $sectiontext = "";
1755 if ($html =~ s/^(.*?)((?:<p\b[^>]*>)?((<b>|<i>|<u>|\s)*)&lt;&lt;TOC\d+&gt;&gt;)/$2/i) {
1756 $sectiontext = $1;
1757 } else {
1758 $sectiontext = $html;
1759 $html = "";
1760 }
1761
1762 # remove tags and extra spaces from the title
1763 $title =~ s/<\/?[^>]+>//g;
1764 $title =~ s/^\s+|\s+$//g;
1765
1766 # close any sections below the current level and
1767 # create a new section (special case for the firstsection)
1768 print PROD "<!--\n";
1769 while (($curtoclevel > $toclevel) ||
1770 (!$firstsection && $curtoclevel == $toclevel)) {
1771 $curtoclevel--;
1772 print PROD "</Section>\n";
1773 }
1774 if ($curtoclevel+1 < $toclevel) {
1775 print STDERR "WARNING - jump in toc levels in $input_filename " .
1776 "from $curtoclevel to $toclevel\n";
1777 }
1778 while ($curtoclevel < $toclevel) {
1779 $curtoclevel++;
1780 }
1781
1782 if ($curtoclevel == 1) {
1783 # add the header tag
1784 print PROD "-->\n";
1785 print PROD "<HTML>\n<HEAD>\n<TITLE>$title</TITLE>\n</HEAD>\n<BODY>\n";
1786 print PROD "<!--\n";
1787 }
1788
1789 print PROD "<Section>\n\t<Description>\n\t\t<Metadata name=\"Title\">$title</Metadata>\n\t</Description>\n";
1790
1791 print PROD "-->\n";
1792
1793 # clean up the section html
1794 $sectiontext = $self->HB_clean_section($sectiontext);
1795
1796 print PROD "$sectiontext\n";
1797
1798 } else {
1799 print STDERR "WARNING - leftover text\n" , $self->shorten($html),
1800 "\nin $input_filename\n";
1801 last;
1802 }
1803 $firstsection = 0;
1804 }
1805
1806 print PROD "<!--\n";
1807 while ($curtoclevel > 0) {
1808 $curtoclevel--;
1809 print PROD "</Section>\n";
1810 }
1811 print PROD "-->\n";
1812
1813 close (PROD) || die("Error Closing File: $tmp_filename $!");
1814
1815 return $tmp_filename;
1816}
1817
1818sub shorten {
1819 my $self = shift (@_);
1820 my ($text) = @_;
1821
1822 return "\"$text\"" if (length($text) < 100);
1823
1824 return "\"" . substr ($text, 0, 50) . "\" ... \"" .
1825 substr ($text, length($text)-50) . "\"";
1826}
1827
1828sub convert_tidy_or_oldHDL_file
1829{
1830 my $self = shift (@_);
1831 my ($file) = @_;
1832 my $input_filename = $file;
1833
1834 if (-d $input_filename)
1835 {
1836 return $input_filename;
1837 }
1838
1839 # get the input filename
1840 my ($tailname, $dirname, $suffix) = &File::Basename::fileparse($input_filename, "\\.[^\\.]+\$");
1841 my $base_dirname = $dirname;
1842 $suffix = lc($suffix);
1843
1844 # derive tmp filename from input filename
1845 # Remove any white space from filename -- no risk of name collision, and
1846 # makes later conversion by utils simpler. Leave spaces in path...
1847 # tidy up the filename with space, dot, hyphen between
1848 $tailname =~ s/\s+//g;
1849 $tailname =~ s/\.+//g;
1850 $tailname =~ s/\-+//g;
1851 # convert to utf-8 otherwise we have problems with the doc.xml file
1852 # later on
1853 &unicode::ensure_utf8(\$tailname);
1854
1855 # softlink to collection tmp dir
1856 my $tmp_dirname = &FileUtils::filenameConcatenate($ENV{'GSDLCOLLECTDIR'}, "tidytmp");
1857 &FileUtils::makeDirectory($tmp_dirname) if (!-e $tmp_dirname);
1858
1859 my $test_dirname = "";
1860 my $f_separator = &util::get_os_dirsep();
1861
1862 if ($dirname =~ m/import$f_separator/)
1863 {
1864 $test_dirname = $'; #'
1865
1866 #print STDERR "init $'\n";
1867
1868 while ($test_dirname =~ m/[$f_separator]/)
1869 {
1870 my $folderdirname = $`;
1871 $tmp_dirname = &FileUtils::filenameConcatenate($tmp_dirname,$folderdirname);
1872 &FileUtils::makeDirectory($tmp_dirname) if (!-e $tmp_dirname);
1873 $test_dirname = $'; #'
1874 }
1875 }
1876
1877 my $tmp_filename = &FileUtils::filenameConcatenate($tmp_dirname, "$tailname$suffix");
1878
1879 # tidy or convert the input file if it is a HTML-like file or it is accepted by the process_exp
1880 if (($suffix eq ".htm") || ($suffix eq ".html") || ($suffix eq ".shtml"))
1881 {
1882 #convert the input file to a new style HDL
1883 my $hdl_output_filename = $input_filename;
1884 if ($self->{'old_style_HDL'})
1885 {
1886 $hdl_output_filename = &FileUtils::filenameConcatenate($tmp_dirname, "$tailname$suffix");
1887 $hdl_output_filename = $self->convert_to_newHDLformat($input_filename,$hdl_output_filename);
1888 }
1889
1890 #just for checking copy all other file from the base dir to tmp dir if it is not exists
1891 opendir(DIR,$base_dirname) or die "Can't open base directory : $base_dirname!";
1892 my @files = grep {!/^\.+$/} readdir(DIR);
1893 close(DIR);
1894
1895 foreach my $file (@files)
1896 {
1897 my $src_file = &FileUtils::filenameConcatenate($base_dirname,$file);
1898 my $dest_file = &FileUtils::filenameConcatenate($tmp_dirname,$file);
1899 if ((!-e $dest_file) && (!-d $src_file))
1900 {
1901 # just copy the original file back to the tmp directory
1902 copy($src_file,$dest_file) or die "Can't copy file $src_file to $dest_file $!";
1903 }
1904 }
1905
1906 # tidy the input file
1907 my $tidy_output_filename = $hdl_output_filename;
1908 if ($self->{'use_realistic_book'})
1909 {
1910 $tidy_output_filename = &FileUtils::filenameConcatenate($tmp_dirname, "$tailname$suffix");
1911 $tidy_output_filename = $self->tmp_tidy_file($hdl_output_filename,$tidy_output_filename);
1912 }
1913 $tmp_filename = $tidy_output_filename;
1914 }
1915 else
1916 {
1917 if (!-e $tmp_filename)
1918 {
1919 # just copy the original file back to the tmp directory
1920 copy($input_filename,$tmp_filename) or die "Can't copy file $input_filename to $tmp_filename $!";
1921 }
1922 }
1923
1924 return $tmp_filename;
1925}
1926
1927
1928# Will make the html input file as a proper XML file with removed font tag and
1929# image size added to the img tag.
1930# The tidying process takes place in a collection specific 'tmp' directory so
1931# that we don't accidentally damage the input.
1932sub tmp_tidy_file
1933{
1934 my $self = shift (@_);
1935 my ($file,$cnfile) = @_;
1936 my $input_filename = $file;
1937 my $tmp_filename = $cnfile;
1938
1939 # get the input filename
1940 my ($tailname, $dirname, $suffix) = &File::Basename::fileparse($input_filename, "\\.[^\\.]+\$");
1941
1942 require HTML::TokeParser::Simple;
1943
1944 # create HTML parser to decode the input file
1945 my $parser = HTML::TokeParser::Simple->new($input_filename);
1946
1947 # write HTML tmp file without the font tag and image size are added to the img tag
1948 open (PROD, ">$tmp_filename") || die("Error Writing to File: $tmp_filename $!");
1949 while (my $token = $parser->get_token())
1950 {
1951 # is it an img tag
1952 if ($token->is_start_tag('img'))
1953 {
1954 # get the attributes
1955 my $attr = $token->return_attr;
1956
1957 # get the full path to the image
1958 my $img_file = &FileUtils::filenameConcatenate($dirname,$attr->{src});
1959
1960 # set the width and height attribute
1961 ($attr->{width}, $attr->{height}) = imgsize($img_file);
1962
1963 # recreate the tag
1964 print PROD "<img";
1965 print PROD map { qq { $_="$attr->{$_}"} } keys %$attr;
1966 print PROD ">";
1967 }
1968 # is it a font tag
1969 else
1970 {
1971 if (($token->is_start_tag('font')) || ($token->is_end_tag('font')))
1972 {
1973 # remove font tag
1974 print PROD "";
1975 }
1976 else
1977 {
1978 # print without changes
1979 print PROD $token->as_is;
1980 }
1981 }
1982 }
1983 close (PROD) || die("Error Closing File: $tmp_filename $!");
1984
1985 # run html-tidy on the tmp file to make it a proper XML file
1986
1987 my $outhandle = $self->{'outhandle'};
1988 print $outhandle "Converting HTML to be XML compliant:\n";
1989
1990 my $tidy_cmd = "tidy";
1991 $tidy_cmd .= " -q" if ($self->{'verbosity'} <= 2);
1992 $tidy_cmd .= " -raw -wrap 0 -asxml \"$tmp_filename\"";
1993 if ($self->{'verbosity'} <= 2) {
1994 if ($ENV{'GSDLOS'} =~ m/^windows/i) {
1995 $tidy_cmd .= " 2>nul";
1996 }
1997 else {
1998 $tidy_cmd .= " 2>/dev/null";
1999 }
2000 print $outhandle " => $tidy_cmd\n";
2001 }
2002
2003 my $tidyfile = `$tidy_cmd`;
2004
2005 # write result back to the tmp file
2006 open (PROD, ">$tmp_filename") || die("Error Writing to File: $tmp_filename $!");
2007 print PROD $tidyfile;
2008 close (PROD) || die("Error Closing File: $tmp_filename $!");
2009
2010 # return the output filename
2011 return $tmp_filename;
2012}
2013
2014sub associate_cover_image
2015{
2016 my $self = shift(@_);
2017 my ($doc_obj, $filename) = @_;
2018 if (($self->{'use_realistic_book'}) || ($self->{'old_style_HDL'}))
2019 {
2020 # we will have cover image in tidytmp, but want it from import
2021 $filename =~ s/([\\\/])tidytmp([\\\/])/$1import$2/;
2022 }
2023 $self->SUPER::associate_cover_image($doc_obj, $filename);
2024}
2025
2026
20271;
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