File:
[LON-CAPA] /
rat /
lonpage.pm
Revision
1.94:
download - view:
text,
annotated -
select for diffs
Tue Jul 13 00:16:23 2010 UTC (13 years, 9 months ago) by
raeburn
Branches:
MAIN
CVS tags:
version_2_9_X,
version_2_10_0_RC2,
version_2_10_0_RC1,
version_2_10_0,
HEAD
- Fix some issues with headers in TeX which caused begin{document} to be missing in some cases:
(a) generating printouts with answers only
(b) printing .page
- Fix some issue which caused HTML to be included in .tex files for resources within
a page. For now change target to "tex_answer" in lonpage.pm,
if $env{'form.answer_output_mode'} is 'tex' and $env{'form.grade_target'} is 'answer'
- answers for all resources in page appear after rendering of individual
resources in .page, when print type is "with answers" for a .page.
- Eliminate some cases where printing would fail.
1: # The LearningOnline Network with CAPA
2: # Page Handler
3: #
4: # $Id: lonpage.pm,v 1.94 2010/07/13 00:16:23 raeburn Exp $
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: ###
29:
30:
31:
32:
33: package Apache::lonpage;
34:
35: use strict;
36: use Apache::Constants qw(:common :http);
37: use Apache::lonnet;
38: use Apache::loncommon();
39: use Apache::lonxml();
40: use Apache::lonlocal;
41: use Apache::lonmenu;
42: use HTML::TokeParser;
43: use GDBM_File;
44: use Apache::lonsequence;
45: use lib '/home/httpd/lib/perl/';
46: use LONCAPA;
47:
48:
49: # -------------------------------------------------------------- Module Globals
50: my %hash;
51: my @rows;
52:
53: # ------------------------------------------------------------------ Euclid gcd
54:
55: sub euclid {
56: my ($e,$f)=@_;
57: my $a; my $b; my $r;
58: if ($e>$f) { $b=$e; $r=$f; } else { $r=$e; $b=$f; }
59: while ($r!=0) {
60: $a=$b; $b=$r;
61: $r=$a%$b;
62: }
63: return $b;
64: }
65:
66: # ------------------------------------------------------------ Build page table
67:
68: sub tracetable {
69: my ($sofar,$rid,$beenhere)=@_;
70: my $further=$sofar;
71: my $randomout=0;
72: unless ($env{'request.role.adv'}) {
73: $randomout = $hash{'randomout_'.$rid};
74: }
75: unless ($beenhere=~/\&$rid\&/) {
76: $beenhere.=$rid.'&';
77: unless ($randomout) {
78: if (defined($hash{'is_map_'.$rid})) {
79: if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&
80: (defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) {
81: my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};
82: $sofar=
83: &tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}},
84: '&'.$frid.$beenhere);
85: $sofar++;
86: if ($hash{'src_'.$frid}) {
87: my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$frid});
88: if (($brepriv eq '2') || ($brepriv eq 'F')) {
89: if (defined($rows[$sofar])) {
90: $rows[$sofar].='&'.$frid;
91: } else {
92: $rows[$sofar]=$frid;
93: }
94: }
95: }
96: }
97: } else {
98: $sofar++;
99: if ($hash{'src_'.$rid}) {
100: my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$rid});
101: if (($brepriv eq '2') || ($brepriv eq 'F')) {
102: if (defined($rows[$sofar])) {
103: $rows[$sofar].='&'.$rid;
104: } else {
105: $rows[$sofar]=$rid;
106: }
107: }
108: }
109: }
110: }
111:
112: if (defined($hash{'to_'.$rid})) {
113: my $mincond=1;
114: my $next='';
115: foreach (split(/\,/,$hash{'to_'.$rid})) {
116: my $thiscond=
117: &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}});
118: if ($thiscond>=$mincond) {
119: if ($next) {
120: $next.=','.$_.':'.$thiscond;
121: } else {
122: $next=$_.':'.$thiscond;
123: }
124: if ($thiscond>$mincond) { $mincond=$thiscond; }
125: }
126: }
127: foreach (split(/\,/,$next)) {
128: my ($linkid,$condval)=split(/\:/,$_);
129: if ($condval>=$mincond) {
130: my $now=&tracetable($sofar,$hash{'goesto_'.$linkid},$beenhere);
131: if ($now>$further) { $further=$now; }
132: }
133: }
134: }
135: }
136: return $further;
137: }
138:
139: # ================================================================ Main Handler
140:
141: sub handler {
142: my $r=shift;
143:
144: # ------------------------------------------- Set document type for header only
145:
146: if ($r->header_only) {
147: if ($env{'browser.mathml'}) {
148: &Apache::loncommon::content_type($r,'text/xml');
149: } else {
150: &Apache::loncommon::content_type($r,'text/html');
151: }
152: $r->send_http_header;
153: return OK;
154: }
155:
156: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
157: ['forceselect','launch']);
158: my $number_of_columns = 1;
159: my $requrl=$r->uri;
160: my $target = $env{'form.grade_target'};
161:
162: # Short term solution: define target as 'tex_answer' when retrieving answers
163: # for resources in a .page when generating printouts.
164: # A better long-term fix would be to modify the way problem rendering, and
165: # answer rendering are retrieved for individual resources when printing a .page,
166: # so rendered problem and answer are sequential for individual resources in
167: # the .page
168: #
169: if ($target eq 'answer') {
170: if ($env{'form.answer_output_mode'} eq 'tex') {
171: $target = 'tex_answer';
172: }
173: }
174: # &Apache::lonnet::logthis("Got a target of $target");
175: if ($target eq 'meta') {
176: &Apache::loncommon::content_type($r,'text/html');
177: $r->send_http_header;
178: return OK;
179: }
180: # ----------------------------------------------------------------- Tie db file
181: if (($env{'request.course.fn'}) && (!$env{'form.forceselect'})) {
182: my $fn=$env{'request.course.fn'};
183: if (-e "$fn.db") {
184: if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) {
185: # ------------------------------------------------------------------- Hash tied
186: my $firstres=$hash{'map_start_'.$requrl};
187: my $lastres=$hash{'map_finish_'.$requrl};
188: if (($firstres) && ($lastres)) {
189: # ----------------------------------------------------------------- Render page
190:
191: @rows=();
192:
193: &tracetable(0,$firstres,'&');
194:
195: # ------------------------------------------------------------ Add to symb list
196:
197: my $i;
198: my %symbhash=();
199: for ($i=0;$i<=$#rows;$i++) {
200: if ($rows[$i]) {
201: my @colcont=split(/\&/,$rows[$i]);
202: foreach my $rid (@colcont) {
203: my ($mapid,$resid)=split(/\./,$rid);
204: $symbhash{$hash{'src_'.$rid}}=
205: [$hash{'src_'.$rid},$resid];
206: }
207: }
208: }
209: &Apache::lonnet::symblist($requrl,%symbhash);
210:
211: # ------------------------------------------------------------------ Page parms
212:
213: my $j;
214: my $lcm=1;
215: my $contents=0;
216: my $nforms=0;
217:
218: my %ssibody=();
219: my %ssibgcolor=();
220: my %ssitext=();
221: my %ssilink=();
222: my %ssivlink=();
223: my %ssialink=();
224:
225: my %cellemb=();
226:
227: my $allscript='';
228: my $allmeta='';
229:
230: my $isxml=0;
231: my $xmlheader='';
232: my $xmlbody='';
233:
234: # --------------------------------------------- Get SSI output, post parameters
235:
236: for ($i=0;$i<=$#rows;$i++) {
237: if ($rows[$i]) {
238: $contents++;
239: my @colcont=split(/\&/,$rows[$i]);
240: $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1));
241: foreach (@colcont) {
242: my $src=$hash{'src_'.$_};
243: my ($extension)=($src=~/\.(\w+)$/);
244: if ($hash{'encrypted_'.$_}) {
245: $src=&Apache::lonenc::encrypted($src);
246: }
247: $cellemb{$_}=
248: &Apache::loncommon::fileembstyle($extension);
249: if ($cellemb{$_} eq 'ssi') {
250: # --------------------------------------------------------- This is an SSI cell
251: my ($mapid,$resid)=split(/\./,$_);
252: my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$src);
253:
254: my $prefix=$_.'_';
255: my %posthash=('request.prefix' => $prefix,
256: 'LONCAPA_INTERNAL_no_discussion' => 'true',
257: 'symb' => $symb);
258: if (($env{'form.grade_target'} eq 'tex') ||
259: ($env{'form.answer_output_mode'} eq 'tex')) {
260: $posthash{'grade_target'}=$env{'form.grade_target'};
261: $posthash{'textwidth'}=$env{'form.textwidth'};
262: $posthash{'problem_split'}=$env{'form.problem_split'};
263: $posthash{'latex_type'}=$env{'form.latex_type'};
264: $posthash{'rndseed'}=$env{'form.rndseed'};
265: $posthash{'answer_output_mode'} = $env{'form.answer_output_mode'};
266: }
267: my $submitted=exists($env{'form.all_submit'});
268: if (!$submitted) {
269: foreach my $key (keys(%env)) {
270: if ($key=~/^form.\Q$prefix\Esubmit_/) {
271: $submitted=1;last;
272: }
273: }
274: }
275: if ($submitted) {
276: foreach my $key (keys(%env)) {
277: if ($key=~/^form.\Q$prefix\E/) {
278: my $name=$key;
279: $name=~s/^form.\Q$prefix\E//;
280: $posthash{$name}=$env{$key};
281: }
282: }
283: if (exists($env{'form.all_submit'})) {
284: $posthash{'all_submit'}='yes';
285: }
286: }
287: my $output=Apache::lonnet::ssi($src,%posthash);
288: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
289: if (($target eq 'tex') || ($target eq 'tex_answer')) {
290: $output =~ s/^([^&]+)\\begin{document}//;
291: $output =~ s/\\end{document}//;
292: # $output = '\parbox{\minipagewidth}{ '.$output.' }';
293: #some additional cleanup necessary for LateX (due to limitations of table environment
294: $output =~ s/(\\vskip\s*\d+mm)\s*(\\\\)+/$1/g;
295: }
296: my $parser=HTML::TokeParser->new(\$output);
297: my $token;
298: my $thisdir=$src;
299: my $bodydef=0;
300: my $thisxml=0;
301: my @rlinks=();
302: if ($output=~/\?xml/) {
303: $isxml=1;
304: $thisxml=1;
305: $output=~
306: /((?:\<(?:\?xml|\!DOC|html)[^\>]*(?:\>|\>\]\>)\s*)+)\<body[^\>]*\>/si;
307: $xmlheader=$1;
308: }
309: while ($token=$parser->get_token) {
310: if ($token->[0] eq 'S') {
311: if ($token->[1] eq 'a') {
312: if ($token->[2]->{'href'}) {
313: $rlinks[$#rlinks+1]=
314: $token->[2]->{'href'};
315: }
316: } elsif ($token->[1] eq 'img') {
317: $rlinks[$#rlinks+1]=
318: $token->[2]->{'src'};
319: } elsif ($token->[1] eq 'embed') {
320: $rlinks[$#rlinks+1]=
321: $token->[2]->{'src'};
322: } elsif ($token->[1] eq 'base') {
323: $thisdir=$token->[2]->{'href'};
324: } elsif ($token->[1] eq 'body') {
325: $bodydef=1;
326: $ssibgcolor{$_}=$token->[2]->{'bgcolor'};
327: $ssitext{$_}=$token->[2]->{'text'};
328: $ssilink{$_}=$token->[2]->{'link'};
329: $ssivlink{$_}=$token->[2]->{'vlink'};
330: $ssialink{$_}=$token->[2]->{'alink'};
331: if ($thisxml) {
332: $xmlbody=$token->[4];
333: }
334: } elsif ($token->[1] eq 'meta') {
335: if ($token->[4] !~ m:/>$:) {
336: $allmeta.="\n".$token->[4].'</meta>';
337: } else {
338: $allmeta.="\n".$token->[4];
339: }
340: } elsif (($token->[1] eq 'script') &&
341: ($bodydef==0)) {
342: $allscript.="\n\n"
343: .$parser->get_text('/script');
344: }
345: }
346: }
347: if ($output=~/\<body[^\>]*\>(.*)/si) {
348: $output=$1;
349: }
350: $output=~s/\<\/body\>.*//si;
351: if ($output=~/\<form/si) {
352: $nforms++;
353: $output=~s/\<form[^\>]*\>//gsi;
354: $output=~s/\<\/form[^\>]*\>//gsi;
355: $output=~
356: s/\<((?:input|select|button|textarea)[^\>]+)name\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 name="$prefix$2" $3\>/gsi;
357: }
358: $thisdir=~s/\/[^\/]*$//;
359: foreach (@rlinks) {
360: unless (($_=~/^https?\:\/\//i) ||
361: ($_=~/^\//) ||
362: ($_=~/^javascript:/i) ||
363: ($_=~/^mailto:/i) ||
364: ($_=~/^\#/)) {
365: my $newlocation=
366: &Apache::lonnet::hreflocation($thisdir,$_);
367: $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
368: }
369: }
370: # -------------------------------------------------- Deal with Applet codebases
371: $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
372: $ssibody{$_}=$output;
373: # ---------------------------------------------------------------- End SSI cell
374: }
375: }
376: }
377: }
378: unless ($contents) {
379: &Apache::loncommon::content_type($r,'text/html');
380: $r->send_http_header;
381: $r->print(&Apache::loncommon::start_page(undef,undef,
382: {'force_register' => 1,}));
383: $r->print(&mt('This page is either empty or it only contains resources that are currently hidden').'. ');
384: $r->print('<br /><br />'.&mt('Please use the LON-CAPA navigation arrows to move to another item in the course').
385: &Apache::loncommon::end_page());
386: } else {
387: # ------------------------------------------------------------------ Build page
388:
389: # ---------------------------------------------------------------- Send headers
390: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
391: if ($isxml) {
392: &Apache::loncommon::content_type($r,'text/xml');
393: } else {
394: &Apache::loncommon::content_type($r,'text/html');
395: }
396: $r->send_http_header;
397: # ------------------------------------------------------------------------ Head
398: if ($allscript) {
399: $allscript =
400: "\n".'<script type="text/javascript">'."\n".
401: $allscript.
402: "\n</script>\n";
403: }
404: # ------------------------------------------------------------------ Start body
405: $r->print(&Apache::loncommon::start_page(undef,$allscript,
406: {'force_register' => 1,
407: 'bgcolor' => '#ffffff',}));
408: # ------------------------------------------------------------------ Start form
409: if ($nforms) {
410: $r->print('<form name="lonhomework" method="post" enctype="multipart/form-data" action="'.
411: &Apache::lonenc::check_encrypt($requrl)
412: .'">');
413: }
414: } elsif (($target eq 'tex') || ($target eq 'tex_answer')) {
415: # I think this is not needed as the header
416: # will be put in for each of the page parts
417: # by the londefdef.pm now that we are opening up
418: # the parts of a page.
419: #$r->print('\documentclass{article}
420: # \newcommand{\keephidden}[1]{}
421: # \usepackage[dvips]{graphicx}
422: # \usepackage{epsfig}
423: # \usepackage{calc}
424: # \usepackage{longtable}
425: # \begin{document}');
426: }
427: # ----------------------------------------------------------------- Start table
428: if (($target eq 'tex') || ($target eq 'tex_answer')) {
429: # # $r->print('\begin{longtable}INSERTTHEHEADOFLONGTABLE\endfirsthead\endhead ');
430: if ($number_of_columns le $lcm) {$number_of_columns=$lcm;};
431: } else {
432: $r->print('<table width="100%" cols="'.$lcm.'" border="0">');
433: }
434: # generate rows
435: for ($i=0;$i<=$#rows;$i++) {
436: if ($rows[$i]) {
437: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
438: $r->print("\n<tr>");
439: }
440: my @colcont=split(/\&/,$rows[$i]);
441: my $avespan=$lcm/($#colcont+1);
442: for ($j=0;$j<=$#colcont;$j++) {
443: my $rid=$colcont[$j];
444:
445: my $metainfo =&get_buttons(\%hash,$rid).'<br />';
446: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
447: $r->print('<td colspan="'.$avespan.'"');
448: }
449: if ($cellemb{$rid} eq 'ssi') {
450: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
451: if ($ssibgcolor{$rid}) {
452: $r->print(' bgcolor="'.
453: $ssibgcolor{$rid}.'"');
454: }
455: $r->print('>'.$metainfo.'<font');
456:
457: if ($ssitext{$rid}) {
458: $r->print(' text="'.$ssitext{$rid}.'"');
459: }
460: if ($ssilink{$rid}) {
461: $r->print(' link="'.$ssilink{$rid}.'"');
462: }
463: if ($ssitext{$rid}) {
464: $r->print(' vlink="'.$ssivlink{$rid}.'"');
465: }
466: if ($ssialink{$rid}) {
467: $r->print(' alink="'.$ssialink{$rid}.'"');
468: }
469: $r->print('>');
470: }
471: $r->print($ssibody{$rid});
472: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
473: $r->print('</font>');
474: }
475: if ($env{'course.'.
476: $env{'request.course.id'}.
477: '.pageseparators'} eq 'yes') {
478: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
479: $r->print('<hr />');
480: }
481: }
482: } elsif ($cellemb{$rid} eq 'img') {
483: $r->print('>'.$metainfo.'<img src="'.
484: $hash{'src_'.$rid}.'" />');
485: } elsif ($cellemb{$rid} eq 'emb') {
486: $r->print('>'.$metainfo.'<embed src="'.
487: $hash{'src_'.$rid}.'"></embed>');
488: } elsif (&Apache::lonnet::declutter($hash{'src_'.$rid}) !~/\.(sequence|page)$/) {
489: $r->print($metainfo.'<b>'.$hash{'title_'.$rid}.'</b><br />'.
490: &mt('It is recommended that you use an up-to-date virus scanner before handling this file.').'</p><p><table>'.
491: &Apache::londocs::entryline(0,&mt("Click to download or use your browser's Save Link function"),'/'.&Apache::lonnet::declutter($hash{'src_'.$rid})).'</table></p><br />');
492: }
493: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
494: $r->print('</td>');
495: } else {
496: # for (my $incol=1;$incol<=$avespan;$incol++) {
497: # $r->print(' & ');
498: # }
499: }
500: }
501: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
502: $r->print('</tr>');
503: } else {
504: # $r->print('REMOVETHEHEADOFLONGTABLE\\\\');
505: }
506: }
507: }
508: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
509: $r->print("\n</table>");
510: } else {
511: # $r->print('\end{longtable}\strut');
512: }
513: # ---------------------------------------------------------------- Submit, etc.
514: if ($nforms) {
515: $r->print(
516: '<input name="all_submit" value="Submit All" type="'.
517: (($nforms>1)?'submit':'hidden').'"></input></form>');
518: }
519: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
520: $r->print(&Apache::loncommon::end_page({'discussion'
521: => 1,}));
522: } else {
523: $r->print('\end{document}'.$number_of_columns);
524: }
525: &Apache::lonnet::symblist($requrl,%symbhash);
526: my ($map,$id,$url)=&Apache::lonnet::decode_symb(&Apache::lonnet::symbread());
527: &Apache::lonnet::symblist($map,'last_known'=>[$url,$id]);
528: # -------------------------------------------------------------------- End page
529: }
530: # ------------------------------------------------------------- End render page
531: } else {
532: &Apache::loncommon::content_type($r,'text/html');
533: $r->send_http_header;
534: &Apache::lonsequence::viewmap($r,$requrl);
535: }
536: # ------------------------------------------------------------------ Untie hash
537: unless (untie(%hash)) {
538: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
539: "Could not untie coursemap $fn (browse).</font>");
540: }
541: # -------------------------------------------------------------------- All done
542: return OK;
543: # ----------------------------------------------- Errors, hash could no be tied
544: }
545: }
546: }
547: &Apache::loncommon::content_type($r,'text/html');
548: $r->send_http_header;
549: &Apache::lonsequence::viewmap($r,$requrl);
550: return OK;
551: }
552:
553: sub get_buttons {
554: my ($hash,$rid) = @_;
555:
556: my $metainfo = '';
557: my $esrc=&Apache::lonnet::declutter($hash->{'src_'.$rid});
558: my ($mapid,$resid)=split(/\./,$rid);
559: my $symb=&Apache::lonnet::encode_symb($hash->{'map_id_'.$mapid},
560: $resid,
561: $hash->{'src_'.$rid});
562: if ($hash->{'encrypted_'.$rid}) {
563: $symb=&Apache::lonenc::encrypted($symb);
564: $esrc=&Apache::lonenc::encrypted($esrc);
565: }
566: if ($hash->{'src_'.$rid} !~ m-^/uploaded/-
567: && !$env{'request.enc'}
568: && ($env{'request.role.adv'}
569: || !$hash->{'encrypted_'.$rid})) {
570: $metainfo .='<a name="'.&escape($symb).'" />'.
571: '<a href="'.$hash->{'src_'.$rid}.'.meta'.'" target="LONcatInfo">'.
572: '<img src="/adm/lonMisc/cat_button.png" class="LC_icon" />'.
573: '</a>';
574: }
575: $metainfo .= '<a href="/adm/evaluate?postdata='.
576: &escape($esrc).
577: '" target="LONcatInfo">'.
578: '<img src="/adm/lonMisc/eval_button.png" class="LC_icon" />'.
579: '</a>';
580: if (($hash->{'src_'.$rid}=~/\.(problem|exam|quiz|assess|survey|form)$/) &&
581: ($hash->{'src_'.$rid} !~ m-^/uploaded/-)) {
582:
583: if (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {
584: $metainfo.=
585: '<a href="/adm/grades?symb='.&escape($symb).
586: # '&command=submission" target="LONcatInfo">'.
587: '&command=submission">'.
588: '<img src="/adm/lonMisc/subm_button.png" class="LC_icon" />'.
589: '</a>'.
590: '<a href="/adm/grades?symb='.&escape($symb).
591: # '&command=gradingmenu" target="LONcatInfo">'.
592: '&command=gradingmenu">'.
593: '<img src="/adm/lonMisc/pgrd_button.png" class="LC_icon" />'.
594: '</a>';
595: }
596: if (&Apache::lonnet::allowed('opa',$env{'request.course.id'})) {
597: $metainfo.=
598: '<a href="/adm/parmset?symb='.&escape($symb).
599: # '" target="LONcatInfo">'.
600: '" >'.
601: '<img src="/adm/lonMisc/pprm_button.png" class="LC_icon" />'.
602: '</a>';
603: }
604: }
605: return $metainfo;
606: }
607:
608: 1;
609: __END__
610:
611:
612: =head1 NAME
613:
614: Apache::lonpage - Page Handler
615:
616: =head1 SYNOPSIS
617:
618: Invoked by /etc/httpd/conf/srm.conf:
619:
620: <LocationMatch "^/res/.*\.page$>
621: SetHandler perl-script
622: PerlHandler Apache::lonpage
623: </LocationMatch>
624:
625: =head1 INTRODUCTION
626:
627: This module renders a .page resource.
628:
629: This is part of the LearningOnline Network with CAPA project
630: described at http://www.lon-capa.org.
631:
632: =head1 HANDLER SUBROUTINE
633:
634: This routine is called by Apache and mod_perl.
635:
636: =over 4
637:
638: =item *
639:
640: set document type for header only
641:
642: =item *
643:
644: tie db file
645:
646: =item *
647:
648: render page
649:
650: =item *
651:
652: add to symb list
653:
654: =item *
655:
656: page parms
657:
658: =item *
659:
660: Get SSI output, post parameters
661:
662: =item *
663:
664: SSI cell rendering
665:
666: =item *
667:
668: Deal with Applet codebases
669:
670: =item *
671:
672: Build page
673:
674: =item *
675:
676: send headers
677:
678: =item *
679:
680: start body
681:
682: =item *
683:
684: start form
685:
686: =item *
687:
688: start table
689:
690: =item *
691:
692: submit element, etc, render page, untie hash
693:
694: =back
695:
696: =head1 OTHER SUBROUTINES
697:
698: =over 4
699:
700: =item *
701:
702: euclid() : Euclid's method for determining the greatest common denominator.
703:
704: =item *
705:
706: tracetable() : Build page table.
707:
708: =back
709:
710: =cut
711:
712:
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