| 1 | ###########################################################################
|
|---|
| 2 | #
|
|---|
| 3 | # StructuredHTMLPlug.pm -- html plugin with extra facilities for teasing out
|
|---|
| 4 | # hierarchical structure (such as h1, h2, h3 tags) in an HTML document
|
|---|
| 5 | #
|
|---|
| 6 | # A component of the Greenstone digital library software
|
|---|
| 7 | # from the New Zealand Digital Library Project at the
|
|---|
| 8 | # University of Waikato, New Zealand.
|
|---|
| 9 | #
|
|---|
| 10 | # Copyright (C) 1999 New Zealand Digital Library Project
|
|---|
| 11 | #
|
|---|
| 12 | # This program is free software; you can redistribute it and/or modify
|
|---|
| 13 | # it under the terms of the GNU General Public License as published by
|
|---|
| 14 | # the Free Software Foundation; either version 2 of the License, or
|
|---|
| 15 | # (at your option) any later version.
|
|---|
| 16 | #
|
|---|
| 17 | # This program is distributed in the hope that it will be useful,
|
|---|
| 18 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 19 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|---|
| 20 | # GNU General Public License for more details.
|
|---|
| 21 | #
|
|---|
| 22 | # You should have received a copy of the GNU General Public License
|
|---|
| 23 | # along with this program; if not, write to the Free Software
|
|---|
| 24 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|---|
| 25 | #
|
|---|
| 26 | ###########################################################################
|
|---|
| 27 | package StructuredHTMLPlug;
|
|---|
| 28 |
|
|---|
| 29 | use HTMLPlug;
|
|---|
| 30 | use ImagePlug;
|
|---|
| 31 |
|
|---|
| 32 | sub BEGIN {
|
|---|
| 33 | @ISA = ('HTMLPlug');
|
|---|
| 34 | }
|
|---|
| 35 |
|
|---|
| 36 | my $arguments =
|
|---|
| 37 | [ { 'name' => "check_toc",
|
|---|
| 38 | 'desc' => "StructuredHTMLPlug.check_toc'}",
|
|---|
| 39 | 'type' => "flag",
|
|---|
| 40 | 'reqd' => "no"},
|
|---|
| 41 | { 'name' => "title_header",
|
|---|
| 42 | 'desc' => "{StructuredHTMLPlug.title_header}",
|
|---|
| 43 | 'type' => "regexp",
|
|---|
| 44 | 'reqd' => "no"},
|
|---|
| 45 | { 'name' => "level1_header",
|
|---|
| 46 | 'desc' => "{StructuredHTMLPlug.level1_header}",
|
|---|
| 47 | 'type' => "regexp",
|
|---|
| 48 | 'reqd' => "no"},
|
|---|
| 49 | { 'name' => "level2_header",
|
|---|
| 50 | 'desc' => "{StructuredHTMLPlug.level2_header}",
|
|---|
| 51 | 'type' => "regexp",
|
|---|
| 52 | 'reqd' => "no"},
|
|---|
| 53 | { 'name' => "level3_header",
|
|---|
| 54 | 'desc' => "{StructuredHTMLPlug.level3_header}",
|
|---|
| 55 | 'type' => "regexp",
|
|---|
| 56 | 'reqd' => "no"},
|
|---|
| 57 | { 'name' => "toc_header",
|
|---|
| 58 | 'desc' => "{StructuredHTMLPlug.toc_header}",
|
|---|
| 59 | 'type' => "regexp",
|
|---|
| 60 | 'reqd' => "no"},
|
|---|
| 61 | { 'name' => "tof_header",
|
|---|
| 62 | 'desc' => "{StructuredHTMLPlug.tof_header}",
|
|---|
| 63 | 'type' => "regexp",
|
|---|
| 64 | 'reqd' => "no"}];
|
|---|
| 65 |
|
|---|
| 66 | my $options = { 'name' => "StructuredHTMLPlug",
|
|---|
| 67 | 'desc' => "{StructuredHTMLPlug.desc}",
|
|---|
| 68 | 'abstract' => "no",
|
|---|
| 69 | 'inherits' => "yes",
|
|---|
| 70 | 'args' => $arguments };
|
|---|
| 71 |
|
|---|
| 72 | sub new {
|
|---|
| 73 | my ($class) = shift (@_);
|
|---|
| 74 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
|
|---|
| 75 | push(@$pluginlist, $class);
|
|---|
| 76 |
|
|---|
| 77 | if(defined $arguments){ push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});}
|
|---|
| 78 | if(defined $options) { push(@{$hashArgOptLists->{"OptList"}},$options)};
|
|---|
| 79 |
|
|---|
| 80 | my $self = (defined $hashArgOptLists)? new HTMLPlug($pluginlist,$inputargs,$hashArgOptLists): new HTMLPlug($pluginlist,$inputargs);
|
|---|
| 81 |
|
|---|
| 82 | return bless $self, $class;
|
|---|
| 83 |
|
|---|
| 84 | }
|
|---|
| 85 |
|
|---|
| 86 | sub read {
|
|---|
| 87 | my $self = shift (@_);
|
|---|
| 88 | my ($pluginfo, $base_dir, $file, $metadata, $processor, $maxdocs, $gli) = @_;
|
|---|
| 89 |
|
|---|
| 90 | my $filename = $file;
|
|---|
| 91 | $filename = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\w/;
|
|---|
| 92 |
|
|---|
| 93 | if ($filename =~ m/\.html?$/) {
|
|---|
| 94 | my $poss_doc_filename = $filename;
|
|---|
| 95 | $poss_doc_filename =~ s/\.html?$/.doc/;
|
|---|
| 96 |
|
|---|
| 97 | if (-e $poss_doc_filename) {
|
|---|
| 98 | # this file has already been processed by Word plugin
|
|---|
| 99 | return 0;
|
|---|
| 100 | }
|
|---|
| 101 | }
|
|---|
| 102 | return $self->SUPER::read(@_);
|
|---|
| 103 | }
|
|---|
| 104 |
|
|---|
| 105 | sub process {
|
|---|
| 106 | my $self = shift (@_);
|
|---|
| 107 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj) = @_;
|
|---|
| 108 | my $outhandle = $self->{'outhandle'};
|
|---|
| 109 |
|
|---|
| 110 | print $outhandle "StructuredHTMLPlug: processing $file\n"
|
|---|
| 111 | if $self->{'verbosity'} > 1;
|
|---|
| 112 |
|
|---|
| 113 | my @head_and_body = split(/<body/i,$$textref);
|
|---|
| 114 | my $head = shift(@head_and_body);
|
|---|
| 115 | my $body_text = join("<body", @head_and_body);
|
|---|
| 116 |
|
|---|
| 117 | # get rid of TOC and TOF sections and their title
|
|---|
| 118 | # If check_toc is enables, it means to get rid of toc and tof contents.
|
|---|
| 119 | if ($self->{'check_toc'}){
|
|---|
| 120 | #line-height:150%;mso-ansi-language:FR'>Contents<o:p></o:p></span></b></p>
|
|---|
| 121 | # get rid of Table of Contents title and Table of Figures
|
|---|
| 122 | $body_text =~ s/<p[^>]*><b><span[^>]*>(Table of Content.|Content.)<o:p><\/o:p><\/span><\/b><\/p>//isg;
|
|---|
| 123 | $body_text =~ s/<p[^>]*><b><span[^>]*>(Table of Figure.|Figure.)<o:p><\/o:p><\/span><\/b><\/p>//isg;
|
|---|
| 124 | $body_text =~ s/<p class=(($self->{'toc_header'})[^>]*)>(.+?)<\/p>//isg;
|
|---|
| 125 | $body_text =~ s/<p class=(($self->{'tof_header'})[^>]*)>(.+?)<\/p>//isg;
|
|---|
| 126 | }
|
|---|
| 127 |
|
|---|
| 128 | if ($self->{'title_header'}){
|
|---|
| 129 | $self->{'title_header'} =~ s/^(\()(.*)(\))/$2/is;
|
|---|
| 130 | $body_text =~ s/<p class=(($self->{'title_header'})[^>]*)>(.+?)<\/p>/<p class=$1><title>$3<\/title><\/p>/isg;
|
|---|
| 131 | }
|
|---|
| 132 | if ($self->{'level1_header'}){
|
|---|
| 133 | $self->{'level1_header'} =~ s/^(\()(.*)(\))/$2/is;
|
|---|
| 134 | $body_text =~ s/<p class=(($self->{'level1_header'})[^>]*)>(.+?)<\/p>/<p class=$1><h1>$3<\/h1><\/p>/isg;
|
|---|
| 135 | }
|
|---|
| 136 | if ($self->{'level2_header'}){
|
|---|
| 137 | $self->{'level2_header'} =~ s/^(\()(.*)(\))/$2/is;
|
|---|
| 138 | $body_text =~ s/<p class=(($self->{'level2_header'})[^>]*)>(.+?)<\/p>/<p class=$1><h2>$3<\/h2><\/p>/isg;
|
|---|
| 139 | }
|
|---|
| 140 |
|
|---|
| 141 | if ($self->{'level3_header'}){
|
|---|
| 142 | $self->{'level3_header'} =~ s/^(\()(.*)(\))/$2/is;
|
|---|
| 143 | $body_text =~ s/<p class=(($self->{'level3_header'})[^>]*)>(.+?)<\/p>/<p class=$1><h3>$3<\/h3><\/p>/isg;
|
|---|
| 144 | }
|
|---|
| 145 |
|
|---|
| 146 | # Tidy up extra new lines
|
|---|
| 147 | $body_text =~ s/(<p[^>]*><span[^>]*><o:p> <\/o:p><\/span><\/p>)//isg;
|
|---|
| 148 | $body_text =~ s/(<p[^>]*><o:p> <\/o:p><\/p>)//isg;
|
|---|
| 149 |
|
|---|
| 150 | my $body = "<body".$body_text;
|
|---|
| 151 |
|
|---|
| 152 | my $section_text = $head;
|
|---|
| 153 | $section_text .= "<!--\n<Section>\n-->\n";
|
|---|
| 154 |
|
|---|
| 155 | # split HTML text on <h1>, <h2> etc tags
|
|---|
| 156 | my @h_split = split(/<h/i,$body);
|
|---|
| 157 |
|
|---|
| 158 | my $hnum = 0;
|
|---|
| 159 |
|
|---|
| 160 | my $sectionh1 = 0;
|
|---|
| 161 | $section_text .= shift(@h_split);
|
|---|
| 162 |
|
|---|
| 163 | my $hc;
|
|---|
| 164 | foreach $hc ( @h_split )
|
|---|
| 165 | {
|
|---|
| 166 | if ($hc =~ m/^([1-3])\s*.*?>(.*)$/s)
|
|---|
| 167 | {
|
|---|
| 168 | my $new_hnum = $1;
|
|---|
| 169 | my $hc_after = $2;
|
|---|
| 170 |
|
|---|
| 171 | if ($hc_after =~ m/^(.*?)<\/h$new_hnum>/is)
|
|---|
| 172 | {
|
|---|
| 173 | my $h_text = $1;
|
|---|
| 174 | $hc =~ s/^(\ \;)+/\ \;/g;
|
|---|
| 175 | # boil HTML down to some interesting text
|
|---|
| 176 | $h_text =~ s/^[1-3]>//;
|
|---|
| 177 | $h_text =~ s/<\/?.*?>//sg;
|
|---|
| 178 | $h_text =~ s/\s+/ /sg;
|
|---|
| 179 | $h_text =~ s/^\s$//s;
|
|---|
| 180 | $h_text =~ s/( )+\W*/ /sg;
|
|---|
| 181 |
|
|---|
| 182 | if ($h_text =~ m/\w+/)
|
|---|
| 183 | {
|
|---|
| 184 | if ($new_hnum > $hnum)
|
|---|
| 185 | {
|
|---|
| 186 | # increase section nesting
|
|---|
| 187 | $hnum++;
|
|---|
| 188 | while ($hnum < $new_hnum)
|
|---|
| 189 | {
|
|---|
| 190 | my $spacing = " " x $hnum;
|
|---|
| 191 | $section_text .= "<!--\n";
|
|---|
| 192 | $section_text .= $spacing."<Section>\n";
|
|---|
| 193 | $section_text .= "-->\n";
|
|---|
| 194 | $hnum++;
|
|---|
| 195 | }
|
|---|
| 196 | }
|
|---|
| 197 | else # ($new_hnum <= $hnum)
|
|---|
| 198 | {
|
|---|
| 199 | # descrease section nesting
|
|---|
| 200 | while ($hnum >= $new_hnum)
|
|---|
| 201 | {
|
|---|
| 202 | my $spacing = " " x $hnum;
|
|---|
| 203 | $section_text .= "<!--\n";
|
|---|
| 204 | $section_text .= $spacing."</Section>\n";
|
|---|
| 205 | $section_text .= "-->\n";
|
|---|
| 206 | $hnum--;
|
|---|
| 207 | }
|
|---|
| 208 | $hnum++;
|
|---|
| 209 | }
|
|---|
| 210 |
|
|---|
| 211 | my $spacing = " " x $hnum;
|
|---|
| 212 | $section_text .= "<!--\n";
|
|---|
| 213 | $section_text .= $spacing."<Section>\n";
|
|---|
| 214 | $section_text .= $spacing." <Description>\n";
|
|---|
| 215 | $section_text .= $spacing." <Metadata name=\"Title\">$h_text</Metadata>";
|
|---|
| 216 | $section_text .= $spacing." </Description>\n";
|
|---|
| 217 | $section_text .= "-->\n";
|
|---|
| 218 |
|
|---|
| 219 | print $outhandle $spacing."$h_text\n"
|
|---|
| 220 | if $self->{'verbosity'} > 2;
|
|---|
| 221 |
|
|---|
| 222 | $sectionh1++ if ($hnum==1);
|
|---|
| 223 | }
|
|---|
| 224 | }
|
|---|
| 225 | else {
|
|---|
| 226 | ### print STDERR "***** hc = <h$hc\n\n";
|
|---|
| 227 |
|
|---|
| 228 | }
|
|---|
| 229 | # $section_text .= "<!-- \n</Section>\n-->\n";
|
|---|
| 230 | #print STDERR "***HC = $hc\n";
|
|---|
| 231 | $section_text .= "<h$hc";
|
|---|
| 232 | }
|
|---|
| 233 | else
|
|---|
| 234 | {
|
|---|
| 235 | $section_text .= "<h$hc";
|
|---|
| 236 | }
|
|---|
| 237 | }
|
|---|
| 238 |
|
|---|
| 239 | while ($hnum >= 1)
|
|---|
| 240 | {
|
|---|
| 241 | my $spacing = " " x $hnum;
|
|---|
| 242 | $section_text .= "<!--\n";
|
|---|
| 243 | $section_text .= $spacing."</Section>\n";
|
|---|
| 244 | $section_text .= "-->\n";
|
|---|
| 245 | $hnum--;
|
|---|
| 246 | }
|
|---|
| 247 |
|
|---|
| 248 | $section_text .= "<!--\n</Section>\n-->\n";
|
|---|
| 249 |
|
|---|
| 250 | $$textref = $section_text;
|
|---|
| 251 |
|
|---|
| 252 | # should be textref not testref???
|
|---|
| 253 | # $$testref =~ s/<h(\d+)>(.*?)<\/h$1>/<Section><Metadata name=\"Title\">$1<\/Metadata></Section><h$1><\/h$1>/gi;
|
|---|
| 254 |
|
|---|
| 255 | if ($sectionh1>0)
|
|---|
| 256 | {
|
|---|
| 257 | print $outhandle " Located section headings ..."
|
|---|
| 258 | if $self->{'verbosity'} > 1;
|
|---|
| 259 | }
|
|---|
| 260 | print $outhandle " Passing on the HTMLPlug\n"
|
|---|
| 261 | if $self->{'verbosity'} > 1;
|
|---|
| 262 |
|
|---|
| 263 | $$textref =~ s/<!\[if !vml\]>/<![if vml]>/g;
|
|---|
| 264 |
|
|---|
| 265 | $$textref =~ s/( )+/ /sg;
|
|---|
| 266 |
|
|---|
| 267 | ## $$textref =~ s/<o:p> <\/o:p>//g; # used with VML to space figures?
|
|---|
| 268 |
|
|---|
| 269 | $self->SUPER::process(@_);
|
|---|
| 270 |
|
|---|
| 271 | # associate original file with doc object
|
|---|
| 272 | my $cursection = $doc_obj->get_top_section();
|
|---|
| 273 | my $filename = &util::filename_cat($base_dir, $file);
|
|---|
| 274 | if (-e $filename)
|
|---|
| 275 | {
|
|---|
| 276 | print $outhandle " Adding associated Word document\n"
|
|---|
| 277 | if $self->{'verbosity'} > 1;
|
|---|
| 278 |
|
|---|
| 279 | $doc_obj->associate_file($filename, "doc.doc", undef, $cursection);
|
|---|
| 280 |
|
|---|
| 281 | my $doclink = "<a href=_httpcollection_/index/assoc/[archivedir]/doc.doc>";
|
|---|
| 282 | $doc_obj->add_utf8_metadata ($cursection, "srclink", $doclink);
|
|---|
| 283 | $doc_obj->add_utf8_metadata ($cursection, "srcicon", "_icondoc_");
|
|---|
| 284 | $doc_obj->add_utf8_metadata ($cursection, "/srclink", "</a>");
|
|---|
| 285 |
|
|---|
| 286 | my $file_size = -s $filename;
|
|---|
| 287 | if ($file_size>1024)
|
|---|
| 288 | {
|
|---|
| 289 | my $fs_kbytes = sprintf("%d",$file_size/1024);
|
|---|
| 290 | $doc_obj->add_utf8_metadata ($cursection, "filesize", "$fs_kbytes Kb");
|
|---|
| 291 | }
|
|---|
| 292 | else
|
|---|
| 293 | {
|
|---|
| 294 | $doc_obj->add_utf8_metadata ($cursection, "filesize", "$file_size bytes");
|
|---|
| 295 | }
|
|---|
| 296 |
|
|---|
| 297 | if ($file_size > 200000)
|
|---|
| 298 | {
|
|---|
| 299 | $doc_obj->add_utf8_metadata ($cursection, "fswarning", "1");
|
|---|
| 300 | }
|
|---|
| 301 | }
|
|---|
| 302 | }
|
|---|
| 303 |
|
|---|
| 304 |
|
|---|
| 305 | sub resize_if_necessary
|
|---|
| 306 | {
|
|---|
| 307 | my ($self,$front,$back,$base_dir,$href) = @_;
|
|---|
| 308 |
|
|---|
| 309 | # dig out width and height of image, if there
|
|---|
| 310 | my $img_attributes = "$front back";
|
|---|
| 311 | my ($img_width) = ($img_attributes =~ m/\s+width=\"?(\d+)\"?/i);
|
|---|
| 312 | my ($img_height) = ($img_attributes =~ m/\s+height=\"?(\d+)\"?/i);
|
|---|
| 313 |
|
|---|
| 314 | # derive local filename for image based on its URL
|
|---|
| 315 | my $img_filename = $href;
|
|---|
| 316 | $img_filename =~ s/^[^:]*:\/\///;
|
|---|
| 317 | $img_filename = &util::filename_cat($base_dir, $img_filename);
|
|---|
| 318 |
|
|---|
| 319 | # Replace %20's in URL with a space if required. Note that the filename
|
|---|
| 320 | # may include the %20 in some situations
|
|---|
| 321 | if ($img_filename =~ /\%20/) {
|
|---|
| 322 | if (!-e $img_filename) {
|
|---|
| 323 | $img_filename =~ s/\%20/ /g;
|
|---|
| 324 | }
|
|---|
| 325 | }
|
|---|
| 326 | if ((-e $img_filename) && (defined $img_width) && (defined $img_height)) {
|
|---|
| 327 | # get image info on width and height
|
|---|
| 328 |
|
|---|
| 329 | my $outhandle = $self->{'outhandle'};
|
|---|
| 330 | my $verbosity = $self->{'verbosity'};
|
|---|
| 331 |
|
|---|
| 332 | my ($image_type, $actual_width, $actual_height, $image_size)
|
|---|
| 333 | = &ImagePlug::identify($img_filename, $outhandle, $verbosity);
|
|---|
| 334 |
|
|---|
| 335 | #print STDERR "**** $actual_width x $actual_height";
|
|---|
| 336 | #print STDERR " (requested: $img_width x $img_height)\n";
|
|---|
| 337 |
|
|---|
| 338 | if (($img_width < $actual_width) || ($img_height < $actual_height)) {
|
|---|
| 339 | print $outhandle "Resizing $img_filename\n" if ($verbosity > 0);
|
|---|
| 340 |
|
|---|
| 341 | # derive new image name based on current image
|
|---|
| 342 | my ($tailname, $dirname, $suffix)
|
|---|
| 343 | = &File::Basename::fileparse($input_filename, "\\.[^\\.]+\$");
|
|---|
| 344 |
|
|---|
| 345 | my $resized_filename
|
|---|
| 346 | = &util::filename_cat($dirname, $tailname."_resized".$suffix);
|
|---|
| 347 |
|
|---|
| 348 | #print STDERR "**** suffix = $suffix\n";
|
|---|
| 349 |
|
|---|
| 350 | # Generate smaller image with convert
|
|---|
| 351 | my $newsize = "$img_widthx$image_height";
|
|---|
| 352 | my $command = "convert -interlace plane -verbose "
|
|---|
| 353 | ."-geometry $newsize \"img_$filename\" \"$resized_filename\"";
|
|---|
| 354 | print $outhandle "ImageResize: $command\n" if ($verbosity > 2);
|
|---|
| 355 | my $result = '';
|
|---|
| 356 | print $outhandle "ImageResize result: $result\n" if ($verbosity > 2);
|
|---|
| 357 |
|
|---|
| 358 | }
|
|---|
| 359 | }
|
|---|
| 360 |
|
|---|
| 361 | return $href;
|
|---|
| 362 | }
|
|---|
| 363 |
|
|---|
| 364 |
|
|---|
| 365 |
|
|---|
| 366 |
|
|---|
| 367 | sub replace_images {
|
|---|
| 368 | my $self = shift (@_);
|
|---|
| 369 | my ($front, $link, $back, $base_dir,
|
|---|
| 370 | $file, $doc_obj, $section) = @_;
|
|---|
| 371 | # remove quotes from link at start and end if necessary
|
|---|
| 372 | if ($link=~/^\"/) {
|
|---|
| 373 | $link=~s/^\"//;$link=~s/\"$//;
|
|---|
| 374 | $front.='"';
|
|---|
| 375 | $back="\"$back";
|
|---|
| 376 | }
|
|---|
| 377 |
|
|---|
| 378 | $link =~ s/\n/ /g;
|
|---|
| 379 |
|
|---|
| 380 | my ($href, $hash_part, $rl) = $self->format_link ($link, $base_dir, $file);
|
|---|
| 381 |
|
|---|
| 382 | ## $href = $self->resize_if_necessary($front,$back,$base_dir,$href);
|
|---|
| 383 |
|
|---|
| 384 | my $middle = $self->add_file ($href, $rl, $hash_part, $base_dir, $doc_obj, $section);
|
|---|
| 385 |
|
|---|
| 386 | return $front . $middle . $back;
|
|---|
| 387 | }
|
|---|
| 388 |
|
|---|
| 389 |
|
|---|
| 390 | 1;
|
|---|
