1 | #!/usr/bin/perl -w
|
---|
2 |
|
---|
3 | ###########################################################################
|
---|
4 | #
|
---|
5 | # gsConvert.pl -- convert documents to HTML or TEXT format
|
---|
6 | #
|
---|
7 | # A component of the Greenstone digital library software
|
---|
8 | # from the New Zealand Digital Library Project at the
|
---|
9 | # University of Waikato, New Zealand.
|
---|
10 | #
|
---|
11 | # Copyright (C) 1999 New Zealand Digital Library Project
|
---|
12 | #
|
---|
13 | # This program is free software; you can redistribute it and/or modify
|
---|
14 | # it under the terms of the GNU General Public License as published by
|
---|
15 | # the Free Software Foundation; either version 2 of the License, or
|
---|
16 | # (at your option) any later version.
|
---|
17 | #
|
---|
18 | # This program is distributed in the hope that it will be useful,
|
---|
19 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
20 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
21 | # GNU General Public License for more details.
|
---|
22 | #
|
---|
23 | # You should have received a copy of the GNU General Public License
|
---|
24 | # along with this program; if not, write to the Free Software
|
---|
25 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
---|
26 | #
|
---|
27 | ###########################################################################
|
---|
28 |
|
---|
29 | # gsConvert.pl converts documents in a range of formats to HTML or TEXT
|
---|
30 | # by exploiting third-party programs. These are usually found in the
|
---|
31 | # $GSDLHOME/packages directory.
|
---|
32 | #
|
---|
33 | # Currently, we can convert Microsoft Word and Adobe PDF using specialised
|
---|
34 | # conversion utilities. We can convery any file to text with a perl
|
---|
35 | # implementation of the UNIX strings command.
|
---|
36 | #
|
---|
37 | # We try to convert Postscript files to text using "gs" which is often on
|
---|
38 | # *nix machines. If it isn't (or we're running on Windoze), we do some feeble
|
---|
39 | # text extraction on it using regexps.
|
---|
40 |
|
---|
41 | BEGIN {
|
---|
42 | die "GSDLHOME not set\n" unless defined $ENV{'GSDLHOME'};
|
---|
43 | unshift (@INC, "$ENV{'GSDLHOME'}/perllib");
|
---|
44 | }
|
---|
45 |
|
---|
46 | use parsargv;
|
---|
47 | use util;
|
---|
48 | use Cwd;
|
---|
49 | use File::Basename;
|
---|
50 |
|
---|
51 |
|
---|
52 | sub print_usage
|
---|
53 | {
|
---|
54 | print STDERR "\n";
|
---|
55 | print STDERR "gsConvert.pl: Converts documents in a range of formats to html\n";
|
---|
56 | print STDERR " or text using third-party programs.\n\n";
|
---|
57 | print STDERR " usage: $0 [options] filename\n";
|
---|
58 | print STDERR " options:\n\t-type\tdoc|pdf|ps|rtf\n\t-output\thtml|text\n";
|
---|
59 | print STDERR "\t-timeout\t<max cpu seconds>\n";
|
---|
60 | exit(1);
|
---|
61 | }
|
---|
62 |
|
---|
63 |
|
---|
64 | sub main
|
---|
65 | {
|
---|
66 | my (@ARGV) = @_;
|
---|
67 | my ($input_type,$output_type,$verbose,$timeout);
|
---|
68 |
|
---|
69 | $timeout = 0;
|
---|
70 | # read command-line arguments
|
---|
71 | if (!parsargv::parse(\@ARGV,
|
---|
72 | 'type/(doc|pdf|ps|rtf)/', \$input_type,
|
---|
73 | 'output/(html|text)/', \$output_type,
|
---|
74 | 'timeout/\d+/0',\$timeout,
|
---|
75 | 'verbose/\d+/0', \$verbose))
|
---|
76 | {
|
---|
77 | print_usage();
|
---|
78 | }
|
---|
79 |
|
---|
80 | # Make sure the input file exists and can be opened for reading
|
---|
81 | if (scalar(@ARGV!=1)) {
|
---|
82 | print_usage();
|
---|
83 | }
|
---|
84 |
|
---|
85 | my $input_filename = $ARGV[0];
|
---|
86 | if (!-r $input_filename) {
|
---|
87 | print STDERR "Error: unable to open $input_filename for reading\n";
|
---|
88 | exit(1);
|
---|
89 | }
|
---|
90 |
|
---|
91 | # Deduce filenames
|
---|
92 | my ($tailname,$dirname,$suffix)
|
---|
93 | = File::Basename::fileparse($input_filename, "\\.[^\\.]+\$");
|
---|
94 | my $output_filestem = &util::filename_cat($dirname, "$tailname");
|
---|
95 |
|
---|
96 | if ($input_type eq "")
|
---|
97 | {
|
---|
98 | $input_type = lc (substr($suffix,1,length($suffix)-1));
|
---|
99 | }
|
---|
100 |
|
---|
101 | # Change to temporary working directory
|
---|
102 | my $stored_dir = cwd();
|
---|
103 | chdir ($dirname) || die "Unable to change to directory $dirname";
|
---|
104 |
|
---|
105 | # Select convert utility
|
---|
106 | if (!defined $input_type) {
|
---|
107 | print STDERR "Error: No filename extension or input type defined\n";
|
---|
108 | exit(1);
|
---|
109 | }
|
---|
110 | elsif ($input_type eq "doc") {
|
---|
111 | print &convertDOC($input_filename, $output_filestem, $output_type);
|
---|
112 | print "\n";
|
---|
113 | }
|
---|
114 | elsif ($input_type eq "rtf") {
|
---|
115 | print &convertRTF($input_filename, $output_filestem, $output_type);
|
---|
116 | print "\n";
|
---|
117 | }
|
---|
118 | elsif ($input_type eq "pdf") {
|
---|
119 | print &convertPDF($dirname, $input_filename, $output_filestem, $output_type);
|
---|
120 | print "\n";
|
---|
121 | }
|
---|
122 | elsif ($input_type eq "ps") {
|
---|
123 | print &convertPS($input_filename, $output_filestem, $output_type);
|
---|
124 | print "\n";
|
---|
125 | }
|
---|
126 | else {
|
---|
127 | print STDERR "Error: Unable to convert type '$input_type'\n";
|
---|
128 | exit(1);
|
---|
129 | }
|
---|
130 |
|
---|
131 | # restore to original working directory
|
---|
132 | chdir ($stored_dir) || die "Unable to return to directory $stored_dir";
|
---|
133 |
|
---|
134 | }
|
---|
135 |
|
---|
136 | &main(@ARGV);
|
---|
137 |
|
---|
138 |
|
---|
139 |
|
---|
140 | # Document-type conversion functions
|
---|
141 | #
|
---|
142 | # The following functions attempt to convert documents from their
|
---|
143 | # input type to the specified output type. If no output type was
|
---|
144 | # given, then they first attempt HTML, and then TEXT.
|
---|
145 | #
|
---|
146 | # Each returns the output type ("html" or "text") or "fail" if no
|
---|
147 | # conversion is possible.
|
---|
148 |
|
---|
149 | # Convert a Microsoft word document
|
---|
150 |
|
---|
151 | sub convertDOC {
|
---|
152 | ($input_filename, $output_filestem, $output_type) = @_;
|
---|
153 |
|
---|
154 | # Many .doc files are not in fact word documents!
|
---|
155 | my $realtype = &find_docfile_type($input_filename);
|
---|
156 |
|
---|
157 | if ($realtype eq "word6" || $realtype eq "word7" || $realtype eq "word8") {
|
---|
158 | return &convertWord678($input_filename, $output_filestem, $output_type);
|
---|
159 | } elsif ($realtype eq "rtf") {
|
---|
160 | return &convertRTF($input_filename, $output_filestem, $output_type);
|
---|
161 | } else {
|
---|
162 | return &convertAnything($input_filename, $output_filestem, $output_type);
|
---|
163 | }
|
---|
164 | }
|
---|
165 |
|
---|
166 | # Convert a Microsoft word 6/7/8 document
|
---|
167 |
|
---|
168 | sub convertWord678 {
|
---|
169 | ($input_filename, $output_filestem, $output_type) = @_;
|
---|
170 |
|
---|
171 | my $success = 0;
|
---|
172 |
|
---|
173 | # Attempt specialised conversion to HTML
|
---|
174 | if (!$output_type || ($output_type =~ /html/i)) {
|
---|
175 | $success = &doc_to_html($input_filename, $output_filestem);
|
---|
176 | if ($success) {
|
---|
177 | return "html";
|
---|
178 | }
|
---|
179 | }
|
---|
180 |
|
---|
181 | return &convertAnything($input_filename, $output_filestem, $output_type);
|
---|
182 | }
|
---|
183 |
|
---|
184 |
|
---|
185 | # Convert a Rich Text Format (RTF) file
|
---|
186 |
|
---|
187 | sub convertRTF {
|
---|
188 | ($input_filename, $output_filestem, $output_type) = @_;
|
---|
189 |
|
---|
190 | my $success = 0;
|
---|
191 |
|
---|
192 | # Attempt specialised conversion to HTML
|
---|
193 | if (!$output_type || ($output_type =~ /html/i)) {
|
---|
194 | $success = &rtf_to_html($input_filename, $output_filestem);
|
---|
195 | if ($success) {
|
---|
196 | return "html";
|
---|
197 | }
|
---|
198 | }
|
---|
199 |
|
---|
200 | return &convertAnything($input_filename, $output_filestem, $output_type);
|
---|
201 | }
|
---|
202 |
|
---|
203 |
|
---|
204 | # Convert an unidentified file
|
---|
205 |
|
---|
206 | sub convertAnything {
|
---|
207 | ($input_filename, $output_filestem, $output_type) = @_;
|
---|
208 |
|
---|
209 | my $success = 0;
|
---|
210 |
|
---|
211 | # Attempt simple conversion to HTML
|
---|
212 | if (!$output_type || ($output_type =~ /html/i)) {
|
---|
213 | $success = &any_to_html($input_filename, $output_filestem);
|
---|
214 | if ($success) {
|
---|
215 | return "html";
|
---|
216 | }
|
---|
217 | }
|
---|
218 |
|
---|
219 | # Convert to text
|
---|
220 | if (!$output_type || ($output_type =~ /text/i)) {
|
---|
221 | $success = &any_to_text($input_filename, $output_filestem);
|
---|
222 | if ($success) {
|
---|
223 | return "text";
|
---|
224 | }
|
---|
225 | }
|
---|
226 | return "fail";
|
---|
227 | }
|
---|
228 |
|
---|
229 |
|
---|
230 |
|
---|
231 | # Convert an Adobe PDF document
|
---|
232 |
|
---|
233 | sub convertPDF {
|
---|
234 | ($dirname, $input_filename, $output_filestem, $output_type) = @_;
|
---|
235 |
|
---|
236 | my $success = 0;
|
---|
237 |
|
---|
238 | # Attempt conversion to HTML
|
---|
239 | if (!$output_type || ($output_type =~ /html/i)) {
|
---|
240 | $success = &pdf_to_html($dirname, $input_filename, $output_filestem);
|
---|
241 | if ($success) {
|
---|
242 | return "html";
|
---|
243 | }
|
---|
244 | }
|
---|
245 |
|
---|
246 | # Attempt conversion to TEXT
|
---|
247 | if (!$output_type || ($output_type =~ /text/i)) {
|
---|
248 | $success = &pdf_to_text($dirname, $input_filename, $output_filestem);
|
---|
249 | if ($success) {
|
---|
250 | return "text";
|
---|
251 | }
|
---|
252 | }
|
---|
253 |
|
---|
254 | return "fail";
|
---|
255 |
|
---|
256 | }
|
---|
257 |
|
---|
258 |
|
---|
259 | # Convert an Adobe PostScript document
|
---|
260 |
|
---|
261 | sub convertPS {
|
---|
262 | ($input_filename, $output_filestem, $output_type) = @_;
|
---|
263 |
|
---|
264 | my $success = 0;
|
---|
265 |
|
---|
266 | # Attempt conversion to TEXT
|
---|
267 | if (!$output_type || ($output_type =~ /text/i)) {
|
---|
268 | $success = &ps_to_text($input_filename, $output_filestem);
|
---|
269 | if ($success) {
|
---|
270 | return "text";
|
---|
271 | }
|
---|
272 | }
|
---|
273 |
|
---|
274 | return "fail";
|
---|
275 |
|
---|
276 | }
|
---|
277 |
|
---|
278 |
|
---|
279 | # Find the real type of a .doc file
|
---|
280 | #
|
---|
281 | # We seem to have a lot of files with a .doc extension that are .rtf
|
---|
282 | # files or Word 5 files. This function attempts to tell the difference.
|
---|
283 |
|
---|
284 | sub find_docfile_type {
|
---|
285 | ($input_filename) = @_;
|
---|
286 |
|
---|
287 | open(CHK, "<$input_filename");
|
---|
288 | binmode(CHK);
|
---|
289 | my $line = "";
|
---|
290 | my $first = 1;
|
---|
291 |
|
---|
292 | while (<CHK>) {
|
---|
293 |
|
---|
294 | $line = $_;
|
---|
295 |
|
---|
296 | if ($first) {
|
---|
297 | # check to see if this is an rtf file
|
---|
298 | if ($line =~ /^\{\\rtf/) {
|
---|
299 | close(CHK);
|
---|
300 | return "rtf";
|
---|
301 | }
|
---|
302 | }
|
---|
303 |
|
---|
304 | # is this is a word 6/7/8 document?
|
---|
305 | if ($line =~ /Word\.Document\.([678])/) {
|
---|
306 | close(CHK);
|
---|
307 | return "word$1";
|
---|
308 | }
|
---|
309 |
|
---|
310 | $first = 0;
|
---|
311 |
|
---|
312 | }
|
---|
313 |
|
---|
314 | return "unknown";
|
---|
315 | }
|
---|
316 |
|
---|
317 |
|
---|
318 |
|
---|
319 | # Specific type-to-type conversions
|
---|
320 | #
|
---|
321 | # Each of the following functions attempts to convert a document from
|
---|
322 | # a specific format to another. If they succeed yhey return 1 and leave
|
---|
323 | # the output document(s) in the appropriate place; if they fail they
|
---|
324 | # return 0 and delete any working files.
|
---|
325 |
|
---|
326 |
|
---|
327 | # Attempt to convert a word document to html with the wv program
|
---|
328 |
|
---|
329 | sub doc_to_html {
|
---|
330 | ($input_filename, $output_filestem) = @_;
|
---|
331 |
|
---|
332 | my $wvWare = &util::filename_cat($ENV{'GSDLHOME'}, "bin",
|
---|
333 | $ENV{'GSDLOS'}, "wvWare");
|
---|
334 |
|
---|
335 | # don't include path on windows (to avoid having to play about
|
---|
336 | # with quoting when GSDLHOME might contain spaces) but assume
|
---|
337 | # that the PATH is set up correctly
|
---|
338 | $wvWare = "wvWare" if ($ENV{'GSDLOS'} =~ /^windows$/i);
|
---|
339 |
|
---|
340 | my $wv_conf = &util::filename_cat($ENV{'GSDLHOME'}, "etc",
|
---|
341 | "packages", "wv", "wvHtml.xml");
|
---|
342 |
|
---|
343 | my $cmd = "";
|
---|
344 | if ($timeout) {$cmd = "ulimit -t $timeout;";}
|
---|
345 | $cmd .= "$wvWare --charset utf-8 --config \"$wv_conf\"";
|
---|
346 | $cmd .= " \"$input_filename\" > \"$output_filestem.html\"";
|
---|
347 |
|
---|
348 | # redirecting STDERR is a bad idea on windows 95/98
|
---|
349 | $cmd .= " 2> \"$output_filestem.err\""
|
---|
350 | if $ENV{'GSDLOS'} !~ /^windows$/i;
|
---|
351 |
|
---|
352 | # execute the command
|
---|
353 | if (system($cmd)!=0)
|
---|
354 | {
|
---|
355 | print STDERR "Error executing wv converter: $!. Continuing...\n";
|
---|
356 | }
|
---|
357 |
|
---|
358 | # Was the conversion successful?
|
---|
359 |
|
---|
360 | if (-e "$output_filestem.html") {
|
---|
361 | open(TMP, "$output_filestem.html");
|
---|
362 | $line = <TMP>;
|
---|
363 | close(TMP);
|
---|
364 | if ($line && $line =~ /DOCTYPE HTML/) {
|
---|
365 | &util::rm("$output_filestem.err") if -e "$output_filestem.err";
|
---|
366 | return 1;
|
---|
367 | } else {
|
---|
368 | # An error of some sort occurred
|
---|
369 | &util::rm("$output_filestem.html");
|
---|
370 | &util::rm("$output_filestem.err") if -e "$output_filestem.err";
|
---|
371 | }
|
---|
372 | }
|
---|
373 |
|
---|
374 | return 0;
|
---|
375 | }
|
---|
376 |
|
---|
377 |
|
---|
378 | # Attempt to convert an RTF document to html with rtftohtml
|
---|
379 |
|
---|
380 | sub rtf_to_html {
|
---|
381 | my ($input_filename, $output_filestem) = @_;
|
---|
382 |
|
---|
383 | # formulate the command
|
---|
384 | $cmd = "";
|
---|
385 | if ($timeout) {$cmd = "ulimit -t $timeout;";}
|
---|
386 | $cmd .= "rtftohtml";
|
---|
387 |
|
---|
388 | # it automatically uses $output_filestem.html
|
---|
389 | $cmd .= " \"$input_filename\"";
|
---|
390 |
|
---|
391 | $cmd .= " 2>\"$output_filestem.err\""
|
---|
392 | unless $ENV{'GSDLOS'} =~ /^windows$/i;
|
---|
393 |
|
---|
394 |
|
---|
395 | # execute the command
|
---|
396 | if (system($cmd)!=0)
|
---|
397 | {
|
---|
398 | print STDERR "Error executing rtf converter: $!. Continuing...\n";
|
---|
399 | }
|
---|
400 |
|
---|
401 | &util::rm("$output_filestem.err") if (-e "$output_filestem.err");
|
---|
402 |
|
---|
403 | # Was the conversion successful?
|
---|
404 | if (-e "$output_filestem.html") {
|
---|
405 | return 1;
|
---|
406 | }
|
---|
407 |
|
---|
408 | return 0;
|
---|
409 | }
|
---|
410 |
|
---|
411 |
|
---|
412 | # Convert a pdf file to html with the pdftohtml command
|
---|
413 |
|
---|
414 | sub pdf_to_html {
|
---|
415 | ($dirname, $input_filename, $output_filestem) = @_;
|
---|
416 |
|
---|
417 | $cmd = "";
|
---|
418 | if ($timeout) {$cmd = "ulimit -t $timeout;";}
|
---|
419 | $cmd .= "perl -S pdftohtml.pl -F ";
|
---|
420 | $cmd .= " \"$input_filename\" \"$output_filestem\"";
|
---|
421 | $!=0;
|
---|
422 |
|
---|
423 | if (system($cmd)!=0)
|
---|
424 | {
|
---|
425 | print STDERR "Error executing $cmd";
|
---|
426 | if ($!) {print STDERR ": $!";}
|
---|
427 | print STDERR "\n";
|
---|
428 | return 0;
|
---|
429 | }
|
---|
430 |
|
---|
431 | # make sure the converter made something
|
---|
432 | if (! -e "$output_filestem.html")
|
---|
433 | {
|
---|
434 | &util::rm("$output_filestem.out") if (-e "$output_filestem.out");
|
---|
435 | # print out the converters std err, if any
|
---|
436 | if (-e "$output_filestem.err") {
|
---|
437 | open (ERRLOG, "$output_filestem.err") || die "$!";
|
---|
438 | print STDERR "pdftohtml:\n";
|
---|
439 | while (<ERRLOG>) {
|
---|
440 | print STDERR "$_";
|
---|
441 | }
|
---|
442 | close ERRLOG;
|
---|
443 | }
|
---|
444 | return 0;
|
---|
445 | }
|
---|
446 |
|
---|
447 | &util::rm("$output_filestem.out") if (-e "$output_filestem.out");
|
---|
448 | return 1;
|
---|
449 | }
|
---|
450 |
|
---|
451 | # Convert a PDF file to text with the pdftotext command
|
---|
452 |
|
---|
453 | sub pdf_to_text {
|
---|
454 | ($dirname, $input_filename, $output_filestem) = @_;
|
---|
455 |
|
---|
456 | my $cmd = "pdftotext \"$input_filename\" \"$output_filestem.text\"";
|
---|
457 | $cmd .= " 2> \"$output_filestem.err\"";
|
---|
458 |
|
---|
459 | if (system($cmd)!=0)
|
---|
460 | {
|
---|
461 | print STDERR "Error executing $cmd: $!\n";
|
---|
462 | &util::rm("$output_filestem.text") if (-e "$output_filestem.text");
|
---|
463 | &util::rm("$output_filestem.err") if (-e "$output_filestem.err");
|
---|
464 | return 0;
|
---|
465 | }
|
---|
466 |
|
---|
467 | # make sure the converter made something
|
---|
468 | if (! -e "$output_filestem.text")
|
---|
469 | {
|
---|
470 | &util::rm("$output_filestem.out") if (-e "$output_filestem.out");
|
---|
471 | # print out the converters std err, if any
|
---|
472 | if (-e "$output_filestem.err") {
|
---|
473 | open (ERRLOG, "$output_filestem.err") || die "$!";
|
---|
474 | print STDERR "pdftotext:\n";
|
---|
475 | while (<ERRLOG>) {
|
---|
476 | print STDERR "$_";
|
---|
477 | }
|
---|
478 | close ERRLOG;
|
---|
479 | }
|
---|
480 | return 0;
|
---|
481 | }
|
---|
482 |
|
---|
483 | &util::rm("$output_filestem.err") if (-e "$output_filestem.err");
|
---|
484 | return 1;
|
---|
485 | }
|
---|
486 |
|
---|
487 | # Convert a PostScript document to text
|
---|
488 | # note - just using "ps2ascii" isn't good enough, as it
|
---|
489 | # returns 0 for a postscript interpreter error. ps2ascii is just
|
---|
490 | # a wrapper to "gs" anyway, so we use that cmd here.
|
---|
491 |
|
---|
492 | sub ps_to_text {
|
---|
493 | my ($input_filename, $output_filestem) = @_;
|
---|
494 |
|
---|
495 | my $error = "";
|
---|
496 |
|
---|
497 | # if we're on windows we'll fall straight through without attempting
|
---|
498 | # to use gs
|
---|
499 | if ($ENV{'GSDLOS'} =~ /^windows$/i) {
|
---|
500 | $error = "Windows does not support gs";
|
---|
501 |
|
---|
502 | } else {
|
---|
503 | my $cmd = "gs -q -dNODISPLAY -dNOBIND -dWRITESYSTEMDICT -dSIMPLE -c save ";
|
---|
504 | $cmd .= "-f ps2ascii.ps \"$input_filename\" -c quit > \"$output_filestem.text\"";
|
---|
505 | $cmd .= " 2> $output_filestem.err";
|
---|
506 | $!=0;
|
---|
507 |
|
---|
508 | my $retcode=system($cmd);
|
---|
509 | $retcode = $? >> 8; # see man perlfunc - system for this...
|
---|
510 | # if system returns -1 | 127 (couldn't start program), look at $! for message
|
---|
511 |
|
---|
512 | if ($retcode!=0) {if ($!) {$error=$!;} else {$error="couldn't run.\n";}}
|
---|
513 | elsif (! -e "$output_filestem.text") {
|
---|
514 | $error="did not create output file.\n";
|
---|
515 | }
|
---|
516 | else
|
---|
517 | { # make sure the interpreter didn't get an error. It is technically
|
---|
518 | # possible for the actual text to start with this, but....
|
---|
519 | open PSOUT, "$output_filestem.text";
|
---|
520 | if (<PSOUT> =~ /^Error: (.*)/) {
|
---|
521 | $error="interpreter error - \"$1\"";
|
---|
522 | }
|
---|
523 | close PSOUT;
|
---|
524 | }
|
---|
525 | }
|
---|
526 |
|
---|
527 | if ($error ne "")
|
---|
528 | {
|
---|
529 | print STDERR "PSPlug: WARNING: Error executing gs: $error\n";
|
---|
530 | &util::rm("$output_filestem.text") if (-e "$output_filestem.text");
|
---|
531 | &util::rm("$output_filestem.err") if (-e "$output_filestem.err");
|
---|
532 |
|
---|
533 | # Fine then. We'll just do a lousy job by ourselves...
|
---|
534 | # Based on 5-line regexp sed script found at:
|
---|
535 | # http://snark.ptc.spbu.ru/mail-archives/lout/brown/msg00003.html
|
---|
536 | #
|
---|
537 | print STDERR "PSPlug: Stripping text from postscript\n";
|
---|
538 | my $errorcode=0;
|
---|
539 | open (IN, "$input_filename")
|
---|
540 | || ($errorcode=1, warn "Couldn't read file: $!");
|
---|
541 | open (OUT, ">$output_filestem.text")
|
---|
542 | || ($errorcode=1, warn "Couldn't write file: $!");
|
---|
543 | if ($errorcode) {print STDERR "errors\n";return 0;}
|
---|
544 |
|
---|
545 | my $text=""; # this is for whole .ps file...
|
---|
546 | while (<IN>) {
|
---|
547 | $text.=$_;
|
---|
548 | }
|
---|
549 | close IN;
|
---|
550 |
|
---|
551 | # Make sure this is a ps file...
|
---|
552 | if ($text !~ /^%!/) {
|
---|
553 | print STDERR "Bad postscript header: not %!\n";
|
---|
554 | return 0;
|
---|
555 | }
|
---|
556 |
|
---|
557 | # if ps has Page data, then use it to delete all stuff before it.
|
---|
558 | $text =~ s/^.*?%%Page:.*?\n//s; # treat string as single line
|
---|
559 |
|
---|
560 | # remove all leading non-data stuff
|
---|
561 | $text =~ s/^.*?\(//s;
|
---|
562 |
|
---|
563 | # remove all newline chars for easier processing
|
---|
564 | $text =~ s/\n//g;
|
---|
565 |
|
---|
566 | # Big assumption here - assume that if any co-ordinates are
|
---|
567 | # given, then we are at the end of a sentence.
|
---|
568 | $text =~ s/\)-?\d+\ -?\d+/\) \(\n\)/g;
|
---|
569 |
|
---|
570 | # special characters--
|
---|
571 | $text =~ s/\(\|\)/\(\ - \)/g; # j -> em-dash?
|
---|
572 |
|
---|
573 | # ? ps text formatting (eg italics?) ?
|
---|
574 | $text =~ s/Fn\(f\)/\(\{\)/g; # f -> {
|
---|
575 | $text =~ s/Fn\(g\)/\(\}\)/g; # g -> }
|
---|
576 | $text =~ s/Fn\(j\)/\(\|\)/g; # j -> |
|
---|
577 | # default - remove the rest
|
---|
578 | $text =~ s/\ ?F.\((.+?)\)/\($1\)/g;
|
---|
579 |
|
---|
580 | # attempt to add whitespace between words...
|
---|
581 | # this is based purely on observation, and may be completely wrong...
|
---|
582 | $text =~ s/([^F])[defghijkuy]\(/$1 \( /g;
|
---|
583 | # eg I notice "b(" is sometimes NOT a space if preceded by a
|
---|
584 | # negative number.
|
---|
585 | $text =~ s/\)\d+ ?b\(/\) \( /g;
|
---|
586 |
|
---|
587 | # change quoted braces to brackets
|
---|
588 | $text =~ s/([^\\])\\\(/$1\{/g;
|
---|
589 | $text =~ s/([^\\])\\\)/$1\}/g ;
|
---|
590 |
|
---|
591 | # remove everything that is not between braces
|
---|
592 | $text =~ s/\)([^\(\)])+?\(//sg ;
|
---|
593 |
|
---|
594 | # remove any Trailer eof stuff.
|
---|
595 | $text =~ s/\)[^\)]*$//sg;
|
---|
596 |
|
---|
597 | ### ligatures have special characters...
|
---|
598 | $text =~ s/\\013/ff/g;
|
---|
599 | $text =~ s/\\014/fi/g;
|
---|
600 | $text =~ s/\\015/fl/g;
|
---|
601 | $text =~ s/\\016/ffi/g;
|
---|
602 | $text =~ s/\\214/fi/g;
|
---|
603 | $text =~ s/\\215/fl/g;
|
---|
604 | $text =~ s/\\017/\n\* /g; # asterisk?
|
---|
605 | $text =~ s/\\023/\023/g; # e acute ('e)
|
---|
606 | $text =~ s/\\177/\252/g; # u"
|
---|
607 | # $text =~ s/ ?? /\344/g; # a"
|
---|
608 |
|
---|
609 | print OUT "$text";
|
---|
610 | close OUT;
|
---|
611 | }
|
---|
612 | # wrap the text - use a minimum length. ie, first space after this length.
|
---|
613 | my $wrap_length=72;
|
---|
614 | &util::mv("$output_filestem.text", "$output_filestem.text.tmp");
|
---|
615 | open INFILE, "$output_filestem.text.tmp" ||
|
---|
616 | die "Couldn't open file: $!";
|
---|
617 | open OUTFILE, ">$output_filestem.text" ||
|
---|
618 | die "Couldn't open file for writing: $!";
|
---|
619 | my $line="";
|
---|
620 | while ($line=<INFILE>) {
|
---|
621 | while (length($line)>0) {
|
---|
622 | if (length($line)>$wrap_length) {
|
---|
623 | $line =~ s/^(.{$wrap_length}[^\s]*)\s*//;
|
---|
624 | print OUTFILE "$1\n";
|
---|
625 | } else {
|
---|
626 | print OUTFILE "$line";
|
---|
627 | $line="";
|
---|
628 | }
|
---|
629 | }
|
---|
630 | }
|
---|
631 | close INFILE;
|
---|
632 | close OUTFILE;
|
---|
633 | &util::rm("$output_filestem.text.tmp");
|
---|
634 |
|
---|
635 | &util::rm("$output_filestem.err") if (-e "$output_filestem.err");
|
---|
636 | return 1;
|
---|
637 | }
|
---|
638 |
|
---|
639 |
|
---|
640 | # Convert any file to HTML with a crude perl implementation of the
|
---|
641 | # UNIX strings command.
|
---|
642 |
|
---|
643 | sub any_to_html {
|
---|
644 | ($input_filename, $output_filestem) = @_;
|
---|
645 |
|
---|
646 | # First generate a text file
|
---|
647 | return 0 unless (&any_to_text($input_filename, $output_filestem));
|
---|
648 |
|
---|
649 | # create an HTML file from the text file
|
---|
650 | open(TEXT, "<$output_filestem.text");
|
---|
651 | open(HTML, ">$output_filestem.html");
|
---|
652 |
|
---|
653 | print HTML "<html><head>\n";
|
---|
654 | print HTML "<META HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html\">\n";
|
---|
655 | print HTML "<META NAME=\"GENERATOR\" CONTENT=\"Greenstone any_to_html\">\n";
|
---|
656 | print HTML "</head><body>\n\n";
|
---|
657 |
|
---|
658 | while (<TEXT>) {
|
---|
659 | print HTML "<p> ", $_;
|
---|
660 | }
|
---|
661 | print HTML "\n</body></html>\n";
|
---|
662 |
|
---|
663 | close HTML;
|
---|
664 | close TEXT;
|
---|
665 |
|
---|
666 | &util::rm("$output_filestem.text") if (-e "$output_filestem.text");
|
---|
667 | return 1;
|
---|
668 | }
|
---|
669 |
|
---|
670 | # Convert any file to TEXT with a crude perl implementation of the
|
---|
671 | # UNIX strings command.
|
---|
672 |
|
---|
673 | sub any_to_text {
|
---|
674 | ($input_filename, $output_filestem) = @_;
|
---|
675 |
|
---|
676 | open(IN, "<$input_filename");
|
---|
677 | binmode(IN);
|
---|
678 | open(OUT, ">$output_filestem.text");
|
---|
679 |
|
---|
680 | my ($line);
|
---|
681 | my $dgcount = 0;
|
---|
682 | while (<IN>) {
|
---|
683 | $line = $_;
|
---|
684 |
|
---|
685 | # delete anything that isn't a printable character
|
---|
686 | $line =~ s/[^\040-\176]+/\n/sg;
|
---|
687 |
|
---|
688 | # delete any string less than 10 characters long
|
---|
689 | $line =~ s/^.{0,9}$/\n/mg;
|
---|
690 | while ($line =~ /^.{1,9}$/m) {
|
---|
691 | $line =~ s/^.{0,9}$/\n/mg;
|
---|
692 | $line =~ s/\n+/\n/sg;
|
---|
693 | }
|
---|
694 |
|
---|
695 | # remove extraneous whitespace
|
---|
696 | $line =~ s/\n+/\n/gs;
|
---|
697 | $line =~ s/^\n//gs;
|
---|
698 |
|
---|
699 | # output whatever is left
|
---|
700 | if ($line =~ /[^\n ]/) {
|
---|
701 | print OUT $line;
|
---|
702 | }
|
---|
703 | }
|
---|
704 |
|
---|
705 | close OUT;
|
---|
706 | close IN;
|
---|
707 |
|
---|
708 | return 1;
|
---|
709 | }
|
---|