Annotation of loncom/interface/lonhelp.pm, revision 1.24
1.1 bowersj2 1: # The LearningOnline Network with CAPA
2: # .tex help system web server handler
3: #
4: # Copyright Michigan State University Board of Trustees
5: #
6: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
7: #
8: # LON-CAPA is free software; you can redistribute it and/or modify
9: # it under the terms of the GNU General Public License as published by
10: # the Free Software Foundation; either version 2 of the License, or
11: # (at your option) any later version.
12: #
13: # LON-CAPA is distributed in the hope that it will be useful,
14: # but WITHOUT ANY WARRANTY; without even the implied warranty of
15: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16: # GNU General Public License for more details.
17: #
18: # You should have received a copy of the GNU General Public License
19: # along with LON-CAPA; if not, write to the Free Software
20: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21: #
22: # /home/httpd/html/adm/gpl.txt
23: #
24: # http://www.lon-capa.org/
25: #
26: # .tex file help handler
27: # YEAR=2002
28: # 7/4 Jeremy Bowers
29:
30: package Apache::lonhelp;
31:
32: use strict;
33: use Apache::Constants qw(:common :http);
1.5 albertel 34: use Apache::File();
35: use Apache::loncommon();
36: use Apache::lonacc();
37: use Apache::lontexconvert();
1.9 bowersj2 38: use Apache::lonnavmaps; # for advancedUser
1.11 albertel 39: use Apache::lonlocal;
1.18 albertel 40: use Apache::lonnet;
1.5 albertel 41: use tth();
42: use GDBM_File();
1.1 bowersj2 43:
44: # This sub takes the name of a label in, and converts it to something
45: # that is a valid anchor name.
1.20 www 46:
47: sub processLabelName {
1.1 bowersj2 48: my ($name) = @_;
49: $name =~ tr/a-zA-Z0-9/_/cs;
50: return $name;
51: }
52:
1.20 www 53: # Serve out the text
54: sub servetext {
55: my ($r,$text) = @_;
1.14 www 56: my $bugs=&Apache::loncommon::help_open_bug('Documentation');
1.24 ! albertel 57: my $start_page=
! 58: &Apache::loncommon::start_page('LON-CAPA Help',undef,
! 59: {'only_body' => 1,});
! 60: my $end_page=
! 61: &Apache::loncommon::end_page();
1.14 www 62: my $header=&mt('LON-CAPA Help');
1.16 albertel 63: $r->print(<<HEADER);
1.24 ! albertel 64: $start_page
1.4 bowersj2 65: <h3 style="font: sans-serif"><img align="right"
1.14 www 66: src="/adm/help/gif/lonhelpheader.gif"/>$header<hr />$bugs</h3>
1.2 bowersj2 67: <!-- BEGIN -->
1.1 bowersj2 68: HEADER
69:
1.20 www 70: $r->print($text);
1.1 bowersj2 71:
1.19 albertel 72: if (&Apache::lonnavmaps::advancedUser()) {
1.20 www 73: my $search=&mt('Search LON-CAPA help');
74: my $about=&mt('About LON-CAPA help and More Help');
1.24 ! albertel 75:
1.20 www 76: $r->print(<<FOOTER);
77: <hr /><form method="post">
78: $search: <input type="text" name="searchterm" size="40" /><br />
79: <a href="/adm/help/abouthelp.html">$about</a>
1.1 bowersj2 80: FOOTER
1.24 ! albertel 81:
! 82: }
! 83:
! 84: $r->print(<<ENDBODY);
1.9 bowersj2 85: <!-- END -->
1.24 ! albertel 86: $end_page
1.20 www 87: ENDBODY
1.24 ! albertel 88:
1.1 bowersj2 89: }
90:
91: # Render takes a tex fragment, transforms it for TtH, and returns the
92: # HTML equivalent
1.20 www 93: sub render {
1.2 bowersj2 94: my ($tex, $docroot, $serverroot) = @_;
95: tie (my %fragmentLabels, 'GDBM_File', $docroot . '/adm/help/fragmentLabels.gdbm', 0, 0);
1.1 bowersj2 96:
97: # This tells TtH what to do with captions, labels, and other
98: # things
99: $tex = "\\documentclass{article}\n" . $tex;
100:
101: # We process these ourselves because TtH can't handle then without
102: # LaTeX .aux files
1.2 bowersj2 103: # absolute paths for use with help.loncapa.org
1.1 bowersj2 104: $tex =~ s| \\ref\{([^}]*)\}
1.15 albertel 105: |
106: if (not(exists($fragmentLabels{$1}))) {
107: &Apache::lonnet::logthis("ERROR: $1 not a valid help label");
108: };
109: '\\begin{html}<a href="http://' . $serverroot ."/adm/help/".
1.1 bowersj2 110: substr($fragmentLabels{$1}, 0, -4) .
1.20 www 111: '.hlp#' . &processLabelName($1) .
1.2 bowersj2 112: '"><img src="http://' . $serverroot . '/adm/help/gif/smallHelp.gif" border="0" /></a>' .
113: '\\end{html}'
1.1 bowersj2 114: |gxe;
115:
1.3 bowersj2 116: # Backslashes
117: $tex =~ s|\\textbackslash|###BACKSLASH###|g;
118:
1.1 bowersj2 119: # Figures leftover without captions
120: $tex =~ s| \\includegraphics(\[[^]]*\])*\{([^}]*)\}
1.2 bowersj2 121: | '\\begin{html}<img src="http://' . $serverroot . '/adm/help/gif/' . $2 . '.gif" border="2"'.
1.1 bowersj2 122: ' bordercolor="#000000"/>\\end{html}'
123: |gxe;
124:
1.3 bowersj2 125:
1.17 albertel 126: $tex=&Apache::lontexconvert::tth_converted(\$tex);
1.5 albertel 127:
1.3 bowersj2 128: # Finish backslashes
129: $tex =~ s/###BACKSLASH###/'\\'/ge;
130:
131: # Fix the pretty quotes
132: $tex =~ s/('')|(``)/"/g; #" to get emacs syntax highlighter happy
1.1 bowersj2 133:
134: # For some reason all captions come out as "Figure 0:", so
135: # just duck the issue...
136:
137: $tex =~ s/Figure 0://g;
1.5 albertel 138: $tex.=$Apache::lontexconvert::errorstring;
1.1 bowersj2 139: untie %fragmentLabels;
140:
141: return $tex;
142: }
143:
1.22 www 144: sub listmatches {
145: my ($docroot,$term) =@_;
146: my $output='';
147: opendir(DIR,$docroot.'/adm/help/tex/');
148: foreach my $filename (sort readdir(DIR)) {
149: if ($filename=~/\.tex$/) {
150: open(FH,$docroot.'/adm/help/tex/'.$filename);
151: my $quote='';
152: while (my $line=<FH>) {
153: if ($line=~/\Q$term\E/i) {
154: $line=~s/\\\w+//gs;
155: $line=~s/\{//gs;
156: $line=~s/\}//gs;
157: $line=~s/\\/ /gs;
1.23 www 158: $line=~s/(\Q$term\E)/\<b\>$1\<\/b\>/gsi;
1.22 www 159: $quote.='<br />...'.$line.'...';
160: }
161: }
162: close(FH);
163: if ($quote) {
164: my $title=$filename;
165: $title=~s/\_/ /gs;
166: $title=~s/\.tex$//;
167: $filename=~s/\.tex$/\.hlp/;
168: $output.='<li><a href="/adm/help/tex/'.$filename.'">'.$title.'</a>'.$quote.'</li>';
169: }
170: }
171: }
172: closedir(DIR);
173: return ($output?'<ul>'.$output.'</ul>':&mt('"[_1]" not found',$term));
174: }
175:
1.20 www 176: sub handler {
1.1 bowersj2 177: my $r = shift;
178:
1.2 bowersj2 179: my $docroot = $r->dir_config('lonDocRoot');
180: my $serverroot = $ENV{'HTTP_HOST'};
181:
1.21 www 182: &Apache::lonlocal::get_language_handle($r);
183: my $text='';
184: if ($env{'form.searchterm'}=~/\w/) {
1.22 www 185: &Apache::loncommon::content_type($r,"text/html");
186: $text=&listmatches($docroot,$env{'form.searchterm'});
1.21 www 187: } else {
1.22 www 188: my $filenames = &Apache::lonnet::unescape(substr ($ENV{'REQUEST_URI'} ,
189: rindex($ENV{'REQUEST_URI'}, '/') + 1, -4));
190:
191: # Security check on the file; the whole filename must consist
192: # of nothing but alphanums, ' ,, or ., or the file
193: # will be "not found", no matter what.
194:
195: return HTTP_NOT_FOUND if ($filenames !~ /\A[-0-9a-zA-z_'',:.]+\Z/);
196:
197: # Join together the tex files, return HTTP_NOT_FOUND if any of
198: # them are not found
199: my $tex = '';
200: # Since in insertlist.tab I want to specify multiple files,
201: # and insertlist.tab also uses commas, I need something else
202: # so replace : with ,
203: $filenames =~ s/:/,/g;
204: my @files = split(/,/, $filenames);
205:
206: for my $filename (@files) {
207: if (-e $docroot.'/adm/help/tex/'.
208: &Apache::lonlocal::current_language().'/'.
209: $filename.'.tex') {
210: $filename=&Apache::lonlocal::current_language().'/'.$filename;
211: }
212: (my $file = Apache::File->new($docroot
213: . '/adm/help/tex/'.$filename.'.tex'))
1.21 www 214: or return HTTP_NOT_FOUND;
215: $tex .= join('', <$file>);
1.22 www 216: }
217:
218: if ($env{'browser.mathml'}) {
219: &Apache::loncommon::content_type($r,'text/xml');
220: &tth::ttminit();
221: if ($env{'browser.unicode'}) {
222: &tth::ttmoptions('-L -u1');
223: } else {
224: &tth::ttmoptions('-L -u0');
225: }
226: } else {
227: &Apache::loncommon::content_type($r,"text/html");
228: &tth::tthinit();
229: if ($env{'browser.unicode'}) {
230: &tth::tthoptions('-L -u1');
231: } else {
232: &tth::tthoptions('-L -u0');
233: }
234: }
235: $text = &render($tex, $docroot, $serverroot);
1.5 albertel 236: }
237:
1.13 www 238: $r->send_http_header;
1.20 www 239: &servetext($r,$text);
1.1 bowersj2 240: return OK;
241: }
242:
243: 1;
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