Annotation of loncom/xml/lontexconvert.pm, revision 1.109
1.1 harris41 1: # The LearningOnline Network with CAPA
2: # TeX Conversion Module
3: #
1.109 ! dseaton 4: # $Id: lontexconvert.pm,v 1.108 2011/06/06 16:08:45 raeburn Exp $
1.4 www 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
1.1 harris41 39:
40: package Apache::lontexconvert;
41:
42: use strict;
1.33 albertel 43: use tth();
1.1 harris41 44: use vars qw($errorstring);
1.73 albertel 45: #use Apache::lonxml();
1.33 albertel 46: use Apache::lonlocal;
1.65 albertel 47: use Apache::lonnet;
1.75 www 48: use lib '/home/httpd/lib/perl/';
49: use LONCAPA;
1.94 raeburn 50: use URI::Escape;
51: use IO::Socket::INET;
1.1 harris41 52:
53: # ====================================================================== Header
54:
1.29 albertel 55: sub init_tth {
1.65 albertel 56: my $options=$env{'course.'.$env{'request.course.id'}.'.tthoptions'};
1.74 albertel 57: if ($options =~ /\S/) {
58: $options = ' '.$options;
59: } else {
60: undef($options);
61: }
1.65 albertel 62: if ($env{'browser.mathml'}) {
1.29 albertel 63: &tth::ttminit();
1.65 albertel 64: if ($env{'browser.unicode'}) {
1.74 albertel 65: &tth::ttmoptions('-L -u1'.$options);
1.29 albertel 66: } else {
1.74 albertel 67: &tth::ttmoptions('-L -u0'.$options);
1.29 albertel 68: }
69: } else {
70: &tth::tthinit();
1.65 albertel 71: if ($env{'browser.unicode'}) {
1.74 albertel 72: &tth::tthoptions('-L -u1'.$options);
1.29 albertel 73: } else {
1.74 albertel 74: &tth::tthoptions('-L -u0'.$options);
1.29 albertel 75: }
76: }
77: }
78:
1.1 harris41 79: # ================================================================== Conversion
80:
1.19 albertel 81: $Apache::lontexconvert::messedup=0;
1.36 albertel 82:
1.91 jms 83:
1.36 albertel 84: sub convert_real {
85: my ($texstring)=@_;
86: my ($xmlstring,$errorstring);
87: local $SIG{SEGV}=sub { $Apache::lontexconvert::messedup=1; die; };
88: local $SIG{ALRM}=sub {
1.37 albertel 89: &Apache::lonnet::logthis("ALRM");
1.36 albertel 90: $xmlstring='['.&mt("TeX unconverted due to errors").']';
91: $Apache::lontexconvert::messedup=1;
92: die &mt("TeX unconverted due to errors");
93: };
1.63 albertel 94: &Apache::lonxml::start_alarm();
1.65 albertel 95: if ($env{'browser.mathml'}) {
1.36 albertel 96: $xmlstring=&tth::ttm($$texstring);
97: $xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g;
98: $xmlstring=~s/\<br\>/\<br\/\>/g;
99: $xmlstring=~s/\<p\>/\<p\>\<\/p\>/g;
100: $errorstring.=&tth::ttmerror();
101: } else {
102: $xmlstring=&tth::tth($$texstring);
103: $errorstring.=&tth::ttherror();
104: $xmlstring=~s-</font(\s*)>-</font>-g;
105: }
1.43 www 106: $xmlstring=~s/^\s*\<br clear\=\"all\"/\<br/s;
1.36 albertel 107: $xmlstring=~s/^\s*//;
108: $xmlstring=~s/\s*$//;
1.85 foxr 109: #
110: # \rightleftharpoons is not converted by tth but maps
111: # reasonably well to ⇔. If we get many more of these,
112: # we're going to need to have a translation sub.
113: #
1.87 foxr 114: my $lrharpoon = pack("U", 0x21cc);
115: $xmlstring=~s/\\rightleftharpoons/$lrharpoon/g;
1.85 foxr 116:
1.63 albertel 117: &Apache::lonxml::end_alarm();
1.36 albertel 118: return ($xmlstring,$errorstring);
119: }
120:
1.59 albertel 121: sub tth_converted {
1.31 albertel 122: my $texstring=shift;
1.34 www 123: my $xmlstring='['.&mt('UNDISPLAYABLE').']';
1.31 albertel 124: if ($Apache::lontexconvert::messedup) {
1.35 albertel 125: return '['.&mt('TeX unconverted due to previous errors').']';
1.31 albertel 126: }
1.59 albertel 127: $$texstring ='\\documentstyle{article}'.$$texstring;
128:
1.31 albertel 129: eval(<<'ENDCONV');
1.36 albertel 130: ($xmlstring,$errorstring)=&convert_real($texstring)
1.12 www 131: ENDCONV
1.32 albertel 132: if ($@) {
1.35 albertel 133: $errorstring.=&mt("Evaluation Error: ").$@;
1.32 albertel 134: $Apache::lontexconvert::messedup=1;
135: }
1.37 albertel 136: if ($Apache::lontexconvert::messedup || &tth::tthmessedup() ||
137: $errorstring) {
1.31 albertel 138: &Apache::lonnet::logthis("Trying to kill myself");
139: $Apache::lontexconvert::messedup=1;
1.70 albertel 140: if (ref($Apache::lonxml::request)) {
141: $Apache::lonxml::request->child_terminate();
142: } else {
143: my $request;
144: eval { $request=Apache->request; };
145: if (!$request) {
146: eval { $request=Apache2::RequestUtil->request; };
147: }
148: if ($request) {
149: $request->child_terminate();
150: } else {
151: &Apache::lonnet::logthis("Unable to find a request to do child_terminate on");
152: }
153: }
1.31 albertel 154: }
155: return $xmlstring;
1.1 harris41 156: }
157:
1.62 albertel 158: sub clean_out_math_mode {
159: my ($texstring)=@_;
1.82 albertel 160: $$texstring=~s/(?<!\\)\$//g;
1.62 albertel 161: $$texstring=~s/\\[\)\(\]\[]//g;
162: $$texstring=~s/\\ensuremath//g;
163: return '';
164: }
165:
166: sub displaystyle {
167: my ($texstring)=@_;
1.106 bisitz 168: #has a $$ or \[ or \displaystyle or eqnarray in it, guessinng it's display mode
1.62 albertel 169: if ($$texstring=~/[^\\]\$\$/ ||
1.106 bisitz 170: $$texstring=~/\\\[/ ||
171: $$texstring=~/\\displaystyle/ ||
172: $$texstring=~/eqnarray/
173: ) { return 1; }
1.62 albertel 174: return 0;
175: }
176:
1.109 ! dseaton 177: sub MathJax_converted {
! 178: my $texstring=shift;
! 179: my $tag='math/tex;';
! 180: if (&displaystyle($texstring)) { $tag='math/tex; mode=display'; }
! 181: &clean_out_math_mode($texstring);
! 182: return &MathJax_header().
! 183: '<script type="'.$tag.'">'.$$texstring.'</script>';
! 184: }
! 185:
! 186: {
! 187: #Relies heavily on the previous jsMath installation
! 188: my @MathJax_sent_header;
! 189: sub MathJax_reset {
! 190: undef(@MathJax_sent_header);
! 191: }
! 192: sub MathJax_push {
! 193: push(@MathJax_sent_header,0);
! 194: }
! 195: sub MathJax_header {
! 196: if (!@MathJax_sent_header) {
! 197: &Apache::lonnet::logthis("mismatched calls of MathJax_header and MathJax_process");
! 198: return '';
! 199: }
! 200: return '' if $MathJax_sent_header[-1];
! 201: $MathJax_sent_header[-1]=1;
! 202: return
! 203: '<script type="text/javascript" src="/adm/MathJax/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>'."\n";
! 204: }
! 205: #sub MathJax_process {
! 206: # my $state = pop(@MathJax_sent_header);
! 207: # return '' if !$state;
! 208: # return "\n".
! 209: # '<script type="text/javascript">MathJax.Process()</script>'."\n";
! 210: #}
! 211: #sub MathJax_state {
! 212: # my ($level) = @_;
! 213: # return $MathJax_sent_header[$level];
! 214: #}
! 215: }
! 216:
! 217:
1.59 albertel 218: sub jsMath_converted {
219: my $texstring=shift;
220: my $tag='span';
1.62 albertel 221: if (&displaystyle($texstring)) { $tag='div'; }
222: &clean_out_math_mode($texstring);
1.67 albertel 223: return &jsMath_header().
224: '<'.$tag.' class="math">'.$$texstring.'</'.$tag.'>';
225: }
226:
227: {
1.76 albertel 228: my @jsMath_sent_header;
1.67 albertel 229: sub jsMath_reset {
1.76 albertel 230: undef(@jsMath_sent_header);
231: }
232: sub jsMath_push {
233: push(@jsMath_sent_header,0);
1.67 albertel 234: }
235: sub jsMath_header {
1.80 albertel 236: if (!@jsMath_sent_header) {
237: &Apache::lonnet::logthis("mismatched calls of jsMath_header and jsMath_process");
238: return '';
239: }
1.76 albertel 240: return '' if $jsMath_sent_header[-1];
241: $jsMath_sent_header[-1]=1;
1.67 albertel 242: return
243: '<script type="text/javascript">
244: function NoFontMessage () {}
1.78 albertel 245: jsMath = {Parser: {prototype: {environments: {\'eqnarray*\' :[\'Array\',null,null,\'rcl\',[5/18,5/18],3,\'D\']}}}};
1.67 albertel 246: </script>'."\n".
1.71 albertel 247: '<script type="text/javascript" src="/adm/jsMath/jsMath.js"></script>'."\n";
1.67 albertel 248: }
249: sub jsMath_process {
1.76 albertel 250: my $state = pop(@jsMath_sent_header);
251: return '' if !$state;
1.81 albertel 252: return "\n".
253: '<script type="text/javascript">jsMath.Process()</script>'."\n";
1.67 albertel 254: }
1.84 albertel 255: sub jsMath_state {
256: my ($level) = @_;
257: return $jsMath_sent_header[$level];
258: }
1.62 albertel 259: }
260:
1.83 albertel 261: sub tex_engine {
262: if (exists($env{'form.texengine'})) {
1.88 raeburn 263: if ($env{'form.texengine'} ne '') {
264: return $env{'form.texengine'};
265: }
1.83 albertel 266: }
267: if ($env{'request.course.id'}
268: && exists($env{'course.'.$env{'request.course.id'}.'.texengine'})) {
269: return $env{'course.'.$env{'request.course.id'}.'.texengine'};
270: }
271: if (exists($env{'environment.texengine'})) {
272: return $env{'environment.texengine'};
273: }
274: return 'tth';
275: }
276:
1.72 albertel 277: sub init_math_support {
1.84 albertel 278: my ($inherit_jsmath) = @_;
1.73 albertel 279: &init_tth();
1.76 albertel 280: &Apache::lontexconvert::jsMath_push();
1.84 albertel 281: if (lc(&tex_engine()) eq 'jsmath' ||
282: ($inherit_jsmath && &jsMath_state(-2))) {
1.72 albertel 283: return &Apache::lontexconvert::jsMath_header();
284: }
1.109 ! dseaton 285: &Apache::lontexconvert::MathJax_push();
! 286: if (lc(&tex_engine()) eq 'mathjax') { # ||
! 287: #($inherit_jsmath && &jsMath_state(-2))) {
! 288: return &Apache::lontexconvert::MathJax_header();
! 289: }
1.72 albertel 290: return;
291: }
292:
1.92 hauer 293: sub mimetex_valign {
1.94 raeburn 294: my ($esc_texstring)=@_;
295: my $valign = 0;
296: my $path = '/cgi-bin/mimetex.cgi?'.$esc_texstring;
297: my $socket;
298: &Apache::lonxml::start_alarm();
1.108 raeburn 299: $socket = IO::Socket::INET->new(PeerAddr => 'localhost',
1.107 raeburn 300: PeerPort => 'http(80)',
301: Proto => 'tcp');
1.94 raeburn 302: if ($socket) {
1.96 raeburn 303: my $headreq = "HEAD $path HTTP/1.0\r\n\r\n";
1.94 raeburn 304: print $socket $headreq;
305: while (<$socket>) {
306: if (/Vertical\-Align\:\s*?([\-\d]+)/) {
307: $valign = $1;
308: }
309: }
1.105 raeburn 310: $socket->close();
1.92 hauer 311: }
1.94 raeburn 312: &Apache::lonxml::end_alarm();
313: return $valign;
1.92 hauer 314: }
315:
1.62 albertel 316: sub mimetex_converted {
317: my $texstring=shift;
1.97 www 318:
319: # Alt-Argument for screen readers
320: my $alt_string=$$texstring;
321: $alt_string=~s/\"/\'\'/g;
322:
323: # Is this displaystyle?
324:
1.62 albertel 325: my $displaystyle=&displaystyle($texstring);
326:
1.97 www 327: # Remove math environment delimiters
328:
1.62 albertel 329: &clean_out_math_mode($texstring);
330:
331: if ($displaystyle) {
332: $$texstring='\\displaystyle \\Large '.$$texstring;
1.59 albertel 333: }
1.94 raeburn 334: my $esc_texstring = &uri_escape($$texstring);
335: my $valign = &mimetex_valign($esc_texstring);
1.97 www 336: my $result='<img src="/cgi-bin/mimetex.cgi?'.$esc_texstring.'" style="vertical-align:'.$valign.'px" alt="'.$alt_string.'" />';
1.62 albertel 337: if ($displaystyle) {
1.106 bisitz 338: $result='<div style="text-align:center">'.$result.'</div>';
1.62 albertel 339: }
340: return $result;
1.59 albertel 341: }
342:
343: sub converted {
1.67 albertel 344: my ($string,$mode)=@_;
1.83 albertel 345: if ($mode eq '') { $mode = &tex_engine(); }
1.68 albertel 346: if ($mode =~ /tth/i) {
1.67 albertel 347: return &tth_converted($string);
1.68 albertel 348: } elsif ($mode =~ /jsmath/i) {
1.67 albertel 349: return &jsMath_converted($string);
1.109 ! dseaton 350: } elsif ($mode =~ /mathjax/i) {
! 351: return &MathJax_converted($string);
1.68 albertel 352: } elsif ($mode =~ /mimetex/i) {
1.67 albertel 353: return &mimetex_converted($string);
1.98 www 354: } elsif ($mode =~ /raw/i) {
355: return $$string;
1.59 albertel 356: }
1.67 albertel 357: return &tth_converted($string);
1.59 albertel 358: }
359:
1.6 www 360: # ------------------------------------------------------------ Message display
361:
1.9 albertel 362: sub to_convert {
363: my ($string) = @_;
1.102 faziophi 364: &init_tth();
1.22 www 365: $string=~s/\<br\s*\/?\>/ /gs;
1.30 albertel 366: # $string=~s/\s/ /gs;
1.18 albertel 367: $string=&HTML::Entities::decode($string);
1.9 albertel 368: return &converted(\$string);
369: }
370:
1.20 www 371: sub smiley {
1.31 albertel 372: my $expression=shift;
1.99 faziophi 373: my %smileys=(
374: '\:\-*\)' => 'face-smile.png',
1.100 faziophi 375: '8\-\)' => 'face-cool.png',
376: '8\-(I|\|)' => 'face-glasses.png',
1.101 faziophi 377: '\:\-(I|\|)' => 'face-plain.png',
1.99 faziophi 378: '\:\-(o|O|\(\))' => 'face-surprise.png',
1.101 faziophi 379: ':\-\(' => 'face-sad.png',
380: '\;\-\)' => 'face-wink.png',
381: '\:\-(P|p)' => 'face-raspberry.png',
1.100 faziophi 382: '\:\-(\\\|\\/)' => 'face-uncertain.png',
1.101 faziophi 383: '\:\-D' => 'face-smile-big.png',
384: '\:\-(C|\@)' => 'face-angry.png',
1.99 faziophi 385: '\:(\'|\`)\-*\(' => 'face-crying.png',
1.101 faziophi 386: '\:\-(X|x|\#)' => 'face-quiet.png',
387: '\:\-(s|S)' => 'face-uncertain.png',
388: '\:\-\$' => 'face-embarrassed.png',
389: '\:\-\*' => 'face-kiss.png',
1.99 faziophi 390: '\+O\(' => 'face-sick.png',
391: '(\<\;3|\(heart\))' => 'heart.png',
392: '\(rose\)' => 'rose.png',
393: '\(pizza\)' => 'food-pizza.png',
394: '\(cake\)' => 'food-cake.png',
395: '\(ninja\)' => 'face-ninja.png',
396: '\(pirate\)' => 'face-pirate.png',
397: '\((agree|yes)\)' => 'opinion-agree.png',
398: '\((disagree|nay)\)' => 'opinion-disagree.png',
1.101 faziophi 399: '(o|O)\-\)' => 'face-angel.png',
1.99 faziophi 400: );
1.31 albertel 401: my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'};
1.79 albertel 402: foreach my $smiley (keys(%smileys)) {
1.99 faziophi 403: $expression=~s/$smiley/\<img src="$iconpath\/$smileys{$smiley}" \/\>/gs;
1.31 albertel 404: }
405: return $expression;
1.20 www 406: }
407:
1.6 www 408: sub msgtexconverted {
1.39 raeburn 409: my ($message,$email) = @_;
1.17 albertel 410: $errorstring='';
1.25 www 411: my $outmessage='';
412: my $tex=0;
1.79 albertel 413: foreach my $fragment (split(/(?:\<\;|\<)\/*m\s*(?:\>\;|\>)/i,$message)) {
1.25 www 414: if ($tex) {
1.30 albertel 415: if ($email) {
1.79 albertel 416: $outmessage.='</pre><tt>'.&to_convert($fragment).'</tt><pre>';
417: $tex=0;
1.30 albertel 418: } else {
1.79 albertel 419: $outmessage.=&to_convert($fragment);
420: $tex=0;
1.30 albertel 421: }
1.25 www 422: } else {
1.79 albertel 423: $outmessage.=&smiley($fragment);
424: $tex=1;
1.25 www 425: }
426: }
1.64 albertel 427: $message=$outmessage; $outmessage=''; $tex=0;
1.79 albertel 428: foreach my $fragment (split(/(?:\<\;|\<)\/*algebra\s*(?:\>\;|\>)/i,
429: $message)) {
1.64 albertel 430: if ($tex) {
1.103 faziophi 431: my $algebra = &algebra($fragment, 'web', undef, undef, undef, undef, 'tth');
1.64 albertel 432: if ($email) {
1.103 faziophi 433: $outmessage.='</pre><tt>'.$algebra.'</tt><pre>';
1.79 albertel 434: $tex=0;
1.64 albertel 435: } else {
1.103 faziophi 436: $outmessage.=$algebra;
1.79 albertel 437: $tex=0;
1.64 albertel 438: }
439: } else {
1.103 faziophi 440: $outmessage.=$fragment;
1.79 albertel 441: $tex=1;
1.64 albertel 442: }
443: }
1.24 albertel 444: if (wantarray) {
1.25 www 445: return ($outmessage,$errorstring);
1.24 albertel 446: } else {
1.25 www 447: return $outmessage.$errorstring;
1.24 albertel 448: }
1.1 harris41 449: }
450:
1.44 albertel 451: sub algebra {
1.49 albertel 452: use AlgParser;
1.103 faziophi 453: my ($string,$target,$style,$parstack,$safeeval,$tth)=@_;
1.44 albertel 454: my $parser = new AlgParserWithImplicitExpand;
1.103 faziophi 455: if ($tth eq 'tth') {&init_tth();}
1.46 albertel 456: $string=&prepare_algebra($string);
1.44 albertel 457: my $ret = $parser->parse($string);
458: my $result='['.&mt('Algebra unconverted due to previous errors').']';
459: if ( ref($ret) ) {
1.50 albertel 460: #$parser->tostring();
1.44 albertel 461: $parser->normalize();
462: my $latex=$parser->tolatex();
1.49 albertel 463: $latex=&postprocess_algebra($latex);
1.58 albertel 464: if ($style eq 'display') {
465: $latex='$$'.$latex.'$$x';
466: } else {
1.61 albertel 467: # style is 'inline'
1.58 albertel 468: $latex='\\ensuremath{'.$latex.'}';
469: }
1.44 albertel 470: if ($target eq 'web' || $target eq 'analyze') {
1.89 droeschl 471: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
472: $result = &converted(\$latex,$display);
473: # $result = &converted(\$latex);
1.44 albertel 474: } else {
475: $result = $latex;
476: }
477: } else {
478: &Apache::lonxml::error($parser->{'htmlerror'});
479: }
480: }
481:
1.46 albertel 482: sub prepare_algebra {
483: my ($string)=@_;
484:
1.50 albertel 485: # makes the decision about what is a minus sign easier supposedly
1.57 albertel 486: $string =~ s/(\<\>|\<\=|\>\=[\=\>\<] *)-/$1 zeroplace -/g;
1.48 albertel 487:
1.46 albertel 488: return $string;
489: }
490:
491: sub postprocess_algebra {
492: my ($string)=@_;
1.48 albertel 493:
1.50 albertel 494: # moodle had these and I don't know why, ignoring them for now
1.51 albertel 495: # $string =~s/\\fun/ /g;
1.47 albertel 496:
1.51 albertel 497: # sqrt(3,4) means the 4 root of 3
1.52 albertel 498: $string =~s/\\sqrt{([^,]+),([^\}]+)}/\\sqrt[$2]{$1}/gs;
499:
1.53 albertel 500: # log(3,4) means the log base 4 of 3
501: $string =~s/\\log\\left\((.+?),(.+?)\\right\)/\\log_{$2}\\left($1\\right)/gs;
502:
1.54 albertel 503: # log(3,4) means the log base 4 of 3
504: $string =~s/\\((?:sin|cos|tan|sec|csc|cot)(?:h)?)\\left\((.+?),(.+?)\\right\)/\\$1^{$3}\\left($2\\right)/gs;
505:
1.55 albertel 506: # int(3,a,b) integral from a to b of 3
507: $string =~s/\\int\\left\((.+?),(.+?),(.+?)\\right\)/\\int_{$2}^{$3}\\left($1\\right)/gs;
508:
509: # int( ... dx) -> ...
510: $string =~s/\\int\\left\((.+?)d[a-z]\\right\)/$1/gs;
1.51 albertel 511:
1.56 albertel 512: #
513: $string =~s/\\lim\\left\((.+?),(.+?),(.+?)\\right\)/\\lim_{$2\\to $3}$1/gs;
1.46 albertel 514: return $string;
515: }
1.1 harris41 516: 1;
517: __END__
518:
519:
1.91 jms 520: =pod
521:
522: =head1 NAME
523:
524: Apache::lontexconvert;
525:
526: =head1 SYNOPSIS
527:
528: Access to tth/ttm
529:
530: This is part of the LearningOnline Network with CAPA project
531: described at http://www.lon-capa.org.
532:
533:
534: =head1 SUBROUTINES
535:
536: =over
537:
538: =item init_tth()
539:
540: Header
541:
542: =item convert_real()
543:
544: we need this routine because &converted can get called from inside
545: of the safespace (through &xmlparse('<m>stuff</m>') which doesn't
546: allow the opcode for alarm, so we need to compile this before we get
547: into the safe space since opcode checks only occur at compile time
548:
549: =item tth_converted()
550:
551:
552: =item clean_out_math_mode()
553:
554:
555: =item displaystyle()
556:
557:
558: =item jsMath_converted()
559:
1.109 ! dseaton 560: =item MathJax_converted()
! 561: - Mimics the jsMath functionality
1.91 jms 562:
563: =item tex_engine()
564:
565:
566: =item init_math_support()
567:
1.105 raeburn 568: =item mimetex_valign()
569:
570: Makes a HEAD call to /cgi-bin/mimetex.cgi via IO:: to retrieve the
571: vertical alignment, before the subsequent call to mimetex_converted()
572: which generates the <img> tag and the corresponding image.
573:
574: Input: 1. $esc_texstring (escaped TeX to be rendered by mimetex).
575: Output: 1. $valign - number of pixels: positive or negative integer
576: which will be included in <img> tag for mimetex image to
577: support vertical alignment of image within a line of text.
578:
579: If a server is running SSL, and Apache rewrite rules are in place
580: to rewrite requests for http to https, modification will most likely
581: be needed for pass through for HEAD requests for /cgi-bin/mimetex.cgi.
582:
583: Example rewrite rules which rewrite all http traffic to https,
584: except HEAD requests for /cgi-bin/mimetex.cgi are:
585:
586: <IfModule mod_rewrite.c>
587: RewriteEngine On
588: RewriteLogLevel 0
589:
590: RewriteCond %{HTTPS} off
591: RewriteCond %{HTTP:Host} (.*)
592: RewriteCond %{REQUEST_METHOD} !HEAD
593: RewriteRule ^/(.*) https://%1/$1 [R=301,L]
594:
595: RewriteCond %{HTTPS} off
596: RewriteCond %{HTTP:Host} (.*)
597: RewriteCond %{REQUEST_METHOD} HEAD
598: RewriteCond %{REQUEST_URI} !^/cgi-bin/mimetex.cgi
599: RewriteRule ^/(.*) https://%1/$1 [R=301,L]
600: </IfModule>
1.91 jms 601:
602: =item mimetex_converted()
603:
604:
605: =item converted()
606:
607:
608: =item to_convert()
609:
610: message display
611:
612: =item smiley()
613:
614: ???
615:
616: =item msgtexconverted()
617:
618: =item algebra()
619:
620: =item prepare_algebra()
621:
622: =item postprocess_algebra()
1.1 harris41 623:
1.91 jms 624: =back
1.1 harris41 625:
1.91 jms 626: =cut
1.1 harris41 627:
628:
629:
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