Annotation of loncom/interface/lonhelp.pm, revision 1.47
1.1 bowersj2 1: # The LearningOnline Network with CAPA
1.27 www 2: #
1.47 ! raeburn 3: # $Id: lonhelp.pm,v 1.46 2017/04/01 13:55:32 raeburn Exp $
1.27 www 4: #
1.1 bowersj2 5: # .tex help system web server handler
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
29: # .tex file help handler
1.27 www 30:
1.1 bowersj2 31:
32: package Apache::lonhelp;
33:
34: use strict;
35: use Apache::Constants qw(:common :http);
1.5 albertel 36: use Apache::File();
37: use Apache::loncommon();
38: use Apache::lonacc();
39: use Apache::lontexconvert();
1.9 bowersj2 40: use Apache::lonnavmaps; # for advancedUser
1.11 albertel 41: use Apache::lonlocal;
1.18 albertel 42: use Apache::lonnet;
1.5 albertel 43: use tth();
44: use GDBM_File();
1.27 www 45: use lib '/home/httpd/lib/perl/';
46: use LONCAPA;
47:
1.1 bowersj2 48:
49: # This sub takes the name of a label in, and converts it to something
50: # that is a valid anchor name.
1.20 www 51:
52: sub processLabelName {
1.1 bowersj2 53: my ($name) = @_;
54: $name =~ tr/a-zA-Z0-9/_/cs;
55: return $name;
56: }
57:
1.20 www 58: # Serve out the text
59: sub servetext {
1.42 raeburn 60: my ($r,$uri,$text,$is_mobile,$firstfile) = @_;
61: my $bugs;
62: my %helpconfig = &Apache::lonnet::get_dom('configuration',['helpsettings'],
63: $env{'request.role.domain'});
64: if (ref($helpconfig{'helpsettings'}) eq 'HASH') {
65: if ($helpconfig{'helpsettings'}{'submitbugs'} eq '1') {
66: $bugs = &Apache::loncommon::help_open_bug('Documentation',&mt('Report a documentation bug'));
67: }
68: }
69: my %lt = &Apache::lonlocal::texthash(
70: header => 'LON-CAPA Help',
71: search => 'Search LON-CAPA help',
72: query => 'Search',
73: );
1.47 ! raeburn 74: my $goback;
! 75: if ((($env{'request.lti.login'}) && ($env{'request.lti.target'} eq 'iframe')) ||
! 76: (($env{'request.deeplink.login'}) && ($env{'request.deeplink.target'} eq '_self'))) {
! 77: $goback = '<a href="javascript:history.go(-1);" class="LC_menubuttons_link" title="Go Back">'.
! 78: '<img src="/res/adm/pages/tolastloc.png" alt="'.&mt('Go Back').'" class="LC_icon" border="0" />'.
! 79: '</a> ';
! 80: }
1.16 albertel 81: $r->print(<<HEADER);
1.26 albertel 82: <h3 style="font: sans-serif"><img align="right" alt="help logo"
1.47 ! raeburn 83: src="/adm/help/gif/lonhelpheader.gif" />$goback$lt{'header'}</h3><hr />
1.2 bowersj2 84: <!-- BEGIN -->
1.1 bowersj2 85: HEADER
1.41 raeburn 86: if ($is_mobile) {
87: my $width = 500;
88: my $height = 400;
89: my $machine = &Apache::lonnet::absolute_url();
90: $r->print(&Apache::loncommon::nicescroll_javascript('helpwrapper',
91: {cursorcolor => '#00F',
92: railalign => 'right',
93: railoffset => '{top:5,left:40}'},
94: undef,1,$machine.$firstfile));
95: $r->print('<div id="helpwrapper" style="height:'.$height.'px; width:'.$width.'px; overflow: auto;">'.
96: $text.
97: '</div>');
98: } else {
99: $r->print($text);
100: }
1.1 bowersj2 101:
1.19 albertel 102: if (&Apache::lonnavmaps::advancedUser()) {
1.42 raeburn 103: $r->print(<<FOOTER);
104: <hr /><div class="LC_left_float">
105: <form action="$uri" method="post">
106: <fieldset><legend>$lt{'search'}</legend>
107: <input type="text" name="searchterm" size="40" />
108: <input type="submit" value="$lt{'query'}" />
109: </fieldset>
110: </form>
111: </div>
1.44 bisitz 112: <div class="LC_left_float">
1.42 raeburn 113: </div>
114: <div style="padding:0;clear:both;margin:0;border:0"></div>
1.30 www 115: $bugs
1.1 bowersj2 116: FOOTER
1.24 albertel 117: }
118:
119: $r->print(<<ENDBODY);
1.9 bowersj2 120: <!-- END -->
1.20 www 121: ENDBODY
1.24 albertel 122:
1.1 bowersj2 123: }
124:
125: # Render takes a tex fragment, transforms it for TtH, and returns the
126: # HTML equivalent
1.20 www 127: sub render {
1.36 albertel 128: my ($tex, $docroot) = @_;
1.2 bowersj2 129: tie (my %fragmentLabels, 'GDBM_File', $docroot . '/adm/help/fragmentLabels.gdbm', 0, 0);
1.1 bowersj2 130:
131: # This tells TtH what to do with captions, labels, and other
132: # things
133: $tex = "\\documentclass{article}\n" . $tex;
134:
135: # We process these ourselves because TtH can't handle then without
136: # LaTeX .aux files
1.2 bowersj2 137: # absolute paths for use with help.loncapa.org
1.1 bowersj2 138: $tex =~ s| \\ref\{([^}]*)\}
1.15 albertel 139: |
1.30 www 140: my $label=$1;
1.40 raeburn 141: my $icon='/adm/help/help.png';
142: my $ext;
1.30 www 143: if ($1!~/\.hlp$/) {
1.40 raeburn 144: if (($1 =~ /^\w+\.manual\.pdf$/) && (-e $docroot.'/adm/help/'.$1)) {
145: $icon = '/adm/lonIcons/pdf.gif';
146: } elsif ((!exists($fragmentLabels{$1})) && ($1!~/\.hlp$/)) {
1.30 www 147: &Apache::lonnet::logthis("ERROR: $1 not a valid help label");
148: $label='Error';
149: } else {
150: $label=substr($fragmentLabels{$1}, 0, -4);
1.40 raeburn 151: $ext = '.hlp#' . &processLabelName($1);
1.30 www 152: }
153: } else {
154: $label=~s/\.hlp$//;
1.40 raeburn 155: $ext = '.hlp#' . &processLabelName($1);
1.30 www 156: }
1.33 albertel 157: '\\begin{html}<a href="/adm/help/'.
1.30 www 158: $label .
1.40 raeburn 159: $ext .
1.44 bisitz 160: '"><img src="'.$icon.'" border="0" alt="'.&mt('Help').'" /></a>' .
1.2 bowersj2 161: '\\end{html}'
1.1 bowersj2 162: |gxe;
163:
1.3 bowersj2 164: # Backslashes
165: $tex =~ s|\\textbackslash|###BACKSLASH###|g;
166:
1.1 bowersj2 167: # Figures leftover without captions
168: $tex =~ s| \\includegraphics(\[[^]]*\])*\{([^}]*)\}
1.33 albertel 169: | '\\begin{html}<img src="/adm/help/gif/' . $2 . '.gif" border="2"'.
1.1 bowersj2 170: ' bordercolor="#000000"/>\\end{html}'
171: |gxe;
172:
1.3 bowersj2 173:
1.17 albertel 174: $tex=&Apache::lontexconvert::tth_converted(\$tex);
1.5 albertel 175:
1.3 bowersj2 176: # Finish backslashes
177: $tex =~ s/###BACKSLASH###/'\\'/ge;
178:
179: # Fix the pretty quotes
180: $tex =~ s/('')|(``)/"/g; #" to get emacs syntax highlighter happy
1.1 bowersj2 181:
1.45 raeburn 182: $tex =~ s/`/'/g;
183:
1.1 bowersj2 184: # For some reason all captions come out as "Figure 0:", so
185: # just duck the issue...
186:
187: $tex =~ s/Figure 0://g;
1.34 albertel 188: $tex.=$Apache::lontexconvert::errorstring;
1.1 bowersj2 189: untie %fragmentLabels;
190:
191: return $tex;
192: }
193:
1.22 www 194: sub listmatches {
1.25 www 195: my ($docroot,$term,$subdir) =@_;
196: unless ($subdir) { $subdir=''; }
1.22 www 197: my $output='';
1.25 www 198: opendir(DIR,$docroot.'/adm/help/tex/'.$subdir);
1.22 www 199: foreach my $filename (sort readdir(DIR)) {
200: if ($filename=~/\.tex$/) {
1.25 www 201: open(FH,$docroot.'/adm/help/tex/'.$subdir.$filename);
1.22 www 202: my $quote='';
203: while (my $line=<FH>) {
204: if ($line=~/\Q$term\E/i) {
205: $line=~s/\\\w+//gs;
206: $line=~s/\{//gs;
207: $line=~s/\}//gs;
208: $line=~s/\\/ /gs;
1.25 www 209: $line=~s/\</\<\;/gs;
210: $line=~s/\>/\>\;/gs;
1.29 albertel 211: $line=~s/(\Q$term\E)/\<b\>$1\<\/b\>/gsi;
1.22 www 212: $quote.='<br />...'.$line.'...';
213: }
214: }
215: close(FH);
216: if ($quote) {
217: my $title=$filename;
218: $title=~s/\_/ /gs;
219: $title=~s/\.tex$//;
220: $filename=~s/\.tex$/\.hlp/;
1.25 www 221: $output.='<li><a href="/adm/help/tex/'.$subdir.$filename.'">'.$title.'</a>'.$quote.'</li>';
1.22 www 222: }
223: }
224: }
225: closedir(DIR);
1.25 www 226: return (($output?'<ul>'.$output.'</ul>':&mt('"[_1]" not found',$term)),$output);
1.22 www 227: }
228:
1.20 www 229: sub handler {
1.1 bowersj2 230: my $r = shift;
231:
1.2 bowersj2 232: my $docroot = $r->dir_config('lonDocRoot');
233:
1.21 www 234: &Apache::lonlocal::get_language_handle($r);
1.28 albertel 235: &Apache::loncommon::content_type($r,"text/html");
1.41 raeburn 236: my $caller;
237: if ($env{'form.searchterm'}=~/\w/) {
238: $caller = 'search';
239: }
240:
1.43 raeburn 241: my $starthash;
242:
243: if ($env{'browser.mobile'}) {
244: $starthash = {
245: only_body => 1,
246: add_entries => {
247: 'onload' => "javascript:expand_div('$caller');",
248: },
249: };
250: } else {
251: $starthash = {
252: only_body => 1,
253: };
254: }
1.41 raeburn 255: my $firstfile;
1.36 albertel 256: my $start_page=
1.41 raeburn 257: &Apache::loncommon::start_page('LON-CAPA Help',undef,$starthash);
1.21 www 258: my $text='';
1.42 raeburn 259: my $uri = $r->uri;
1.21 www 260: if ($env{'form.searchterm'}=~/\w/) {
1.25 www 261: ($text,my $matches)=&listmatches($docroot,$env{'form.searchterm'},&Apache::lonlocal::current_language().'/');
262: if ($matches) {
263: my ($englishresult,$englishmatches)=&listmatches($docroot,$env{'form.searchterm'});
264: if ($englishmatches) {
265: $text.='<hr />'.$englishresult;
266: }
267: } else {
268: $text=&listmatches($docroot,$env{'form.searchterm'});
269: }
1.21 www 270: } else {
1.42 raeburn 271: my $filenames = &unescape(substr($uri,rindex($uri,'/')+1,-4));
1.22 www 272:
273: # Security check on the file; the whole filename must consist
274: # of nothing but alphanums, ' ,, or ., or the file
275: # will be "not found", no matter what.
276:
277: return HTTP_NOT_FOUND if ($filenames !~ /\A[-0-9a-zA-z_'',:.]+\Z/);
278:
279: # Join together the tex files, return HTTP_NOT_FOUND if any of
280: # them are not found
281: my $tex = '';
282: # Since in insertlist.tab I want to specify multiple files,
283: # and insertlist.tab also uses commas, I need something else
284: # so replace : with ,
285: $filenames =~ s/:/,/g;
286: my @files = split(/,/, $filenames);
1.41 raeburn 287: $firstfile = '/adm/help/'.$files[0].'.hlp';
1.46 raeburn 288: my $count = 0;
1.41 raeburn 289:
1.22 www 290: for my $filename (@files) {
291: if (-e $docroot.'/adm/help/tex/'.
292: &Apache::lonlocal::current_language().'/'.
293: $filename.'.tex') {
294: $filename=&Apache::lonlocal::current_language().'/'.$filename;
295: }
296: (my $file = Apache::File->new($docroot
297: . '/adm/help/tex/'.$filename.'.tex'))
1.21 www 298: or return HTTP_NOT_FOUND;
299: $tex .= join('', <$file>);
1.46 raeburn 300: $count ++;
301: if (scalar(@files) > $count) {
302: $tex .= '\hrulefill';
303: }
1.22 www 304: }
1.28 albertel 305:
1.36 albertel 306: $text = &render($tex, $docroot);
1.5 albertel 307: }
308:
1.13 www 309: $r->send_http_header;
1.36 albertel 310: $r->print($start_page);
1.42 raeburn 311: &servetext($r,$uri,$text,$env{'browser.mobile'},$firstfile);
1.36 albertel 312: $r->print(&Apache::loncommon::end_page());
313:
1.1 bowersj2 314: return OK;
315: }
316:
317: 1;
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