Annotation of loncom/interface/lonhelp.pm, revision 1.22
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) = @_;
1.16 albertel 56: my $html=&Apache::lonxml::xmlbegin();
1.20 www 57: my $htmlend=&Apache::lonxml::xmlend();
1.14 www 58: my $bugs=&Apache::loncommon::help_open_bug('Documentation');
59: my $header=&mt('LON-CAPA Help');
1.16 albertel 60: $r->print(<<HEADER);
61: $html
1.1 bowersj2 62: <head>
63: <title>LON-CAPA Help</title>
64: </head>
65: <body bgcolor="#FFFFFF">
1.4 bowersj2 66: <h3 style="font: sans-serif"><img align="right"
1.14 www 67: src="/adm/help/gif/lonhelpheader.gif"/>$header<hr />$bugs</h3>
1.2 bowersj2 68: <!-- BEGIN -->
1.1 bowersj2 69: HEADER
70:
1.20 www 71: $r->print($text);
1.1 bowersj2 72:
1.19 albertel 73: if (&Apache::lonnavmaps::advancedUser()) {
1.20 www 74: my $search=&mt('Search LON-CAPA help');
75: my $about=&mt('About LON-CAPA help and More Help');
76: $r->print(<<FOOTER);
1.2 bowersj2 77: <!-- END -->
1.20 www 78: <hr /><form method="post">
79: $search: <input type="text" name="searchterm" size="40" /><br />
80: <a href="/adm/help/abouthelp.html">$about</a>
1.1 bowersj2 81: </body>
1.20 www 82: $htmlend
1.1 bowersj2 83: FOOTER
1.22 ! www 84: } else {
! 85: $r->print(<<ENDBODY);
1.9 bowersj2 86: <!-- END -->
87: </body>
1.20 www 88: $htmlend
89: ENDBODY
1.22 ! www 90: }
1.1 bowersj2 91: }
92:
93: # Render takes a tex fragment, transforms it for TtH, and returns the
94: # HTML equivalent
1.20 www 95: sub render {
1.2 bowersj2 96: my ($tex, $docroot, $serverroot) = @_;
97: tie (my %fragmentLabels, 'GDBM_File', $docroot . '/adm/help/fragmentLabels.gdbm', 0, 0);
1.1 bowersj2 98:
99: # This tells TtH what to do with captions, labels, and other
100: # things
101: $tex = "\\documentclass{article}\n" . $tex;
102:
103: # We process these ourselves because TtH can't handle then without
104: # LaTeX .aux files
1.2 bowersj2 105: # absolute paths for use with help.loncapa.org
1.1 bowersj2 106: $tex =~ s| \\ref\{([^}]*)\}
1.15 albertel 107: |
108: if (not(exists($fragmentLabels{$1}))) {
109: &Apache::lonnet::logthis("ERROR: $1 not a valid help label");
110: };
111: '\\begin{html}<a href="http://' . $serverroot ."/adm/help/".
1.1 bowersj2 112: substr($fragmentLabels{$1}, 0, -4) .
1.20 www 113: '.hlp#' . &processLabelName($1) .
1.2 bowersj2 114: '"><img src="http://' . $serverroot . '/adm/help/gif/smallHelp.gif" border="0" /></a>' .
115: '\\end{html}'
1.1 bowersj2 116: |gxe;
117:
1.3 bowersj2 118: # Backslashes
119: $tex =~ s|\\textbackslash|###BACKSLASH###|g;
120:
1.1 bowersj2 121: # Figures leftover without captions
122: $tex =~ s| \\includegraphics(\[[^]]*\])*\{([^}]*)\}
1.2 bowersj2 123: | '\\begin{html}<img src="http://' . $serverroot . '/adm/help/gif/' . $2 . '.gif" border="2"'.
1.1 bowersj2 124: ' bordercolor="#000000"/>\\end{html}'
125: |gxe;
126:
1.3 bowersj2 127:
1.17 albertel 128: $tex=&Apache::lontexconvert::tth_converted(\$tex);
1.5 albertel 129:
1.3 bowersj2 130: # Finish backslashes
131: $tex =~ s/###BACKSLASH###/'\\'/ge;
132:
133: # Fix the pretty quotes
134: $tex =~ s/('')|(``)/"/g; #" to get emacs syntax highlighter happy
1.1 bowersj2 135:
136: # For some reason all captions come out as "Figure 0:", so
137: # just duck the issue...
138:
139: $tex =~ s/Figure 0://g;
1.5 albertel 140: $tex.=$Apache::lontexconvert::errorstring;
1.1 bowersj2 141: untie %fragmentLabels;
142:
143: return $tex;
144: }
145:
1.22 ! www 146: sub listmatches {
! 147: my ($docroot,$term) =@_;
! 148: my $output='';
! 149: opendir(DIR,$docroot.'/adm/help/tex/');
! 150: foreach my $filename (sort readdir(DIR)) {
! 151: if ($filename=~/\.tex$/) {
! 152: open(FH,$docroot.'/adm/help/tex/'.$filename);
! 153: my $quote='';
! 154: while (my $line=<FH>) {
! 155: if ($line=~/\Q$term\E/i) {
! 156: $line=~s/\\\w+//gs;
! 157: $line=~s/\{//gs;
! 158: $line=~s/\}//gs;
! 159: $line=~s/\\/ /gs;
! 160: $line=~s/\Q$term\E/\<b\>$term\<\/b\>/gsi;
! 161: $quote.='<br />...'.$line.'...';
! 162: }
! 163: }
! 164: close(FH);
! 165: if ($quote) {
! 166: my $title=$filename;
! 167: $title=~s/\_/ /gs;
! 168: $title=~s/\.tex$//;
! 169: $filename=~s/\.tex$/\.hlp/;
! 170: $output.='<li><a href="/adm/help/tex/'.$filename.'">'.$title.'</a>'.$quote.'</li>';
! 171: }
! 172: }
! 173: }
! 174: closedir(DIR);
! 175: return ($output?'<ul>'.$output.'</ul>':&mt('"[_1]" not found',$term));
! 176: }
! 177:
1.20 www 178: sub handler {
1.1 bowersj2 179: my $r = shift;
180:
1.2 bowersj2 181: my $docroot = $r->dir_config('lonDocRoot');
182: my $serverroot = $ENV{'HTTP_HOST'};
183:
1.21 www 184: &Apache::lonlocal::get_language_handle($r);
185: my $text='';
186: if ($env{'form.searchterm'}=~/\w/) {
1.22 ! www 187: &Apache::loncommon::content_type($r,"text/html");
! 188: $text=&listmatches($docroot,$env{'form.searchterm'});
1.21 www 189: } else {
1.22 ! www 190: my $filenames = &Apache::lonnet::unescape(substr ($ENV{'REQUEST_URI'} ,
! 191: rindex($ENV{'REQUEST_URI'}, '/') + 1, -4));
! 192:
! 193: # Security check on the file; the whole filename must consist
! 194: # of nothing but alphanums, ' ,, or ., or the file
! 195: # will be "not found", no matter what.
! 196:
! 197: return HTTP_NOT_FOUND if ($filenames !~ /\A[-0-9a-zA-z_'',:.]+\Z/);
! 198:
! 199: # Join together the tex files, return HTTP_NOT_FOUND if any of
! 200: # them are not found
! 201: my $tex = '';
! 202: # Since in insertlist.tab I want to specify multiple files,
! 203: # and insertlist.tab also uses commas, I need something else
! 204: # so replace : with ,
! 205: $filenames =~ s/:/,/g;
! 206: my @files = split(/,/, $filenames);
! 207:
! 208: for my $filename (@files) {
! 209: if (-e $docroot.'/adm/help/tex/'.
! 210: &Apache::lonlocal::current_language().'/'.
! 211: $filename.'.tex') {
! 212: $filename=&Apache::lonlocal::current_language().'/'.$filename;
! 213: }
! 214: (my $file = Apache::File->new($docroot
! 215: . '/adm/help/tex/'.$filename.'.tex'))
1.21 www 216: or return HTTP_NOT_FOUND;
217: $tex .= join('', <$file>);
1.22 ! www 218: }
! 219:
! 220: if ($env{'browser.mathml'}) {
! 221: &Apache::loncommon::content_type($r,'text/xml');
! 222: &tth::ttminit();
! 223: if ($env{'browser.unicode'}) {
! 224: &tth::ttmoptions('-L -u1');
! 225: } else {
! 226: &tth::ttmoptions('-L -u0');
! 227: }
! 228: } else {
! 229: &Apache::loncommon::content_type($r,"text/html");
! 230: &tth::tthinit();
! 231: if ($env{'browser.unicode'}) {
! 232: &tth::tthoptions('-L -u1');
! 233: } else {
! 234: &tth::tthoptions('-L -u0');
! 235: }
! 236: }
! 237: $text = &render($tex, $docroot, $serverroot);
1.5 albertel 238: }
239:
1.13 www 240: $r->send_http_header;
1.20 www 241: &servetext($r,$text);
1.1 bowersj2 242: return OK;
243: }
244:
245: 1;
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonhelp.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / interface