1: # The LearningOnline Network with CAPA
2: # Page Handler
3: #
4: # $Id: lonpage.pm,v 1.97 2011/11/07 20:06:29 www 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: my $nuploads=0;
218: my %turninpaths;
219: my %multiresps;
220: my $turninparent;
221:
222: my %ssibody=();
223: my %ssibgcolor=();
224: my %ssitext=();
225: my %ssilink=();
226: my %ssivlink=();
227: my %ssialink=();
228:
229: my %cellemb=();
230:
231: my $allscript='';
232: my $allmeta='';
233:
234: my $isxml=0;
235: my $xmlheader='';
236: my $xmlbody='';
237:
238: # --------------------------------------------- Get SSI output, post parameters
239:
240: for ($i=0;$i<=$#rows;$i++) {
241: if ($rows[$i]) {
242: $contents++;
243: my @colcont=split(/\&/,$rows[$i]);
244: $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1));
245: foreach (@colcont) {
246: my $src=$hash{'src_'.$_};
247: my ($extension)=($src=~/\.(\w+)$/);
248: if ($hash{'encrypted_'.$_}) {
249: $src=&Apache::lonenc::encrypted($src);
250: }
251: $cellemb{$_}=
252: &Apache::loncommon::fileembstyle($extension);
253: if ($cellemb{$_} eq 'ssi') {
254: # --------------------------------------------------------- This is an SSI cell
255: my ($mapid,$resid)=split(/\./,$_);
256: my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$src);
257:
258: my $prefix=$_.'_';
259: my %posthash=('request.prefix' => $prefix,
260: 'LONCAPA_INTERNAL_no_discussion' => 'true',
261: 'symb' => $symb);
262: if (($env{'form.grade_target'} eq 'tex') ||
263: ($env{'form.answer_output_mode'} eq 'tex')) {
264: $posthash{'grade_target'}=$env{'form.grade_target'};
265: $posthash{'textwidth'}=$env{'form.textwidth'};
266: $posthash{'problem_split'}=$env{'form.problem_split'};
267: $posthash{'latex_type'}=$env{'form.latex_type'};
268: $posthash{'rndseed'}=$env{'form.rndseed'};
269: $posthash{'answer_output_mode'} = $env{'form.answer_output_mode'};
270: }
271: my $submitted=exists($env{'form.all_submit'});
272: if (!$submitted) {
273: foreach my $key (keys(%env)) {
274: if ($key=~/^form.\Q$prefix\Esubmit_/) {
275: $submitted=1;last;
276: }
277: }
278: }
279: if ($submitted) {
280: foreach my $key (keys(%env)) {
281: if ($key=~/^form.\Q$prefix\E/) {
282: my $name=$key;
283: $name=~s/^form.\Q$prefix\E//;
284: $posthash{$name}=$env{$key};
285: }
286: }
287: if (exists($env{'form.all_submit'})) {
288: $posthash{'all_submit'}='yes';
289: }
290: }
291: my $output=Apache::lonnet::ssi($src,%posthash);
292: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
293: if (($target eq 'tex') || ($target eq 'tex_answer')) {
294: $output =~ s/^([^&]+)\\begin{document}//;
295: $output =~ s/\\end{document}//;
296: # $output = '\parbox{\minipagewidth}{ '.$output.' }';
297: #some additional cleanup necessary for LateX (due to limitations of table environment
298: $output =~ s/(\\vskip\s*\d+mm)\s*(\\\\)+/$1/g;
299: }
300: my $parser=HTML::TokeParser->new(\$output);
301: my $token;
302: my $thisdir=$src;
303: my $bodydef=0;
304: my $thisxml=0;
305: my @rlinks=();
306: if ($output=~/\?xml/) {
307: $isxml=1;
308: $thisxml=1;
309: $output=~
310: /((?:\<(?:\?xml|\!DOC|html)[^\>]*(?:\>|\>\]\>)\s*)+)\<body[^\>]*\>/si;
311: $xmlheader=$1;
312: }
313: while ($token=$parser->get_token) {
314: if ($token->[0] eq 'S') {
315: if ($token->[1] eq 'a') {
316: if ($token->[2]->{'href'}) {
317: $rlinks[$#rlinks+1]=
318: $token->[2]->{'href'};
319: }
320: } elsif ($token->[1] eq 'img') {
321: $rlinks[$#rlinks+1]=
322: $token->[2]->{'src'};
323: } elsif ($token->[1] eq 'embed') {
324: $rlinks[$#rlinks+1]=
325: $token->[2]->{'src'};
326: } elsif ($token->[1] eq 'base') {
327: $thisdir=$token->[2]->{'href'};
328: } elsif ($token->[1] eq 'body') {
329: $bodydef=1;
330: $ssibgcolor{$_}=$token->[2]->{'bgcolor'};
331: $ssitext{$_}=$token->[2]->{'text'};
332: $ssilink{$_}=$token->[2]->{'link'};
333: $ssivlink{$_}=$token->[2]->{'vlink'};
334: $ssialink{$_}=$token->[2]->{'alink'};
335: if ($thisxml) {
336: $xmlbody=$token->[4];
337: }
338: } elsif ($token->[1] eq 'meta') {
339: if ($token->[4] !~ m:/>$:) {
340: $allmeta.="\n".$token->[4].'</meta>';
341: } else {
342: $allmeta.="\n".$token->[4];
343: }
344: } elsif (($token->[1] eq 'script') &&
345: ($bodydef==0)) {
346: $allscript.="\n\n"
347: .$parser->get_text('/script');
348: }
349: }
350: }
351: if ($output=~/\<body[^\>]*\>(.*)/si) {
352: $output=$1;
353: }
354: $output=~s/\<\/body\>.*//si;
355: if ($output=~/\<form/si) {
356: $nforms++;
357: $output=~s/\<form[^\>]*\>//gsi;
358: $output=~s/\<\/form[^\>]*\>//gsi;
359: if ($output=~/\<input[^\>]+name\s*=\s*[\'\"]*HWFILE/) {
360: $nuploads++;
361: }
362: $output=~
363: s/\<((?:input|select|button|textarea)[^\>]+)name\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 name="$prefix$2" $3\>/gsi;
364: if ($nuploads) {
365: $output=~
366: s/\<(input[^\>]+name=\"\Q$prefix\EHWFILE[^\>]+)\s*id\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\)]*)\>/\<$1 id="$prefix$2" $3\>/gsi;
367: ($turninpaths{$prefix},$multiresps{$prefix}) =
368: &Apache::loncommon::get_turnedin_filepath($symb,$env{'user.name'},$env{'user.domain'});
369: if ($turninparent eq '') {
370: $turninparent = $turninpaths{$prefix};
371: $turninparent =~ s{(/[^/]+)$}{};
372: }
373: }
374: $output=~
375: s/\<((?:input|select)[^\>]+\Qjavascript:setSubmittedPart\E)\(\s*[\'\"]([^\'\"]+)[\'\"]*\s*\)/\<$1('$2','$prefix')/gsi;
376: }
377: $thisdir=~s/\/[^\/]*$//;
378: foreach (@rlinks) {
379: unless (($_=~/^https?\:\/\//i) ||
380: ($_=~/^\//) ||
381: ($_=~/^javascript:/i) ||
382: ($_=~/^mailto:/i) ||
383: ($_=~/^\#/)) {
384: my $newlocation=
385: &Apache::lonnet::hreflocation($thisdir,$_);
386: $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
387: }
388: }
389: # -------------------------------------------------- Deal with Applet codebases
390: $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
391: $ssibody{$_}=$output;
392: # ---------------------------------------------------------------- End SSI cell
393: }
394: }
395: }
396: }
397: unless ($contents) {
398: &Apache::loncommon::content_type($r,'text/html');
399: $r->send_http_header;
400: $r->print(&Apache::loncommon::start_page(undef,undef,
401: {'force_register' => 1,}));
402: $r->print(&mt('This page is either empty or it only contains resources that are currently hidden').'. ');
403: $r->print('<br /><br />'.&mt('Please use the LON-CAPA navigation arrows to move to another item in the course').
404: &Apache::loncommon::end_page());
405: } else {
406: # ------------------------------------------------------------------ Build page
407:
408: # ---------------------------------------------------------------- Send headers
409: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
410: if ($isxml) {
411: &Apache::loncommon::content_type($r,'text/xml');
412: } else {
413: &Apache::loncommon::content_type($r,'text/html');
414: }
415: $r->send_http_header;
416: # ------------------------------------------------------------------------ Head
417: if ($allscript) {
418: $allscript =
419: "\n".'<script type="text/javascript">'."\n".
420: $allscript.
421: "\n</script>\n";
422: }
423: if (($nforms) && ($nuploads)) {
424: $allscript .= &Apache::lonhtmlcommon::file_submissionchk_js(\%turninpaths,\%multiresps);
425: }
426: # ------------------------------------------------------------------ Start body
427: $r->print(&Apache::loncommon::start_page(undef,$allscript,
428: {'force_register' => 1,
429: 'bgcolor' => '#ffffff',}));
430: # ------------------------------------------------------------------ Start form
431: if ($nforms) {
432: my $fmtag = '<form name="lonhomework" method="post" enctype="multipart/form-data"';
433: if ($nuploads) {
434: my $multi;
435: if ($nuploads > 1) {
436: $multi = 1;
437: }
438: $fmtag .= 'onsubmit="return file_submission_check(this,'."'$turninparent','$multi'".');"';
439: }
440: $fmtag .= ' action="'.
441: &Apache::lonenc::check_encrypt($requrl)
442: .'">';
443: $r->print($fmtag);
444: }
445: } elsif (($target eq 'tex') || ($target eq 'tex_answer')) {
446: # I think this is not needed as the header
447: # will be put in for each of the page parts
448: # by the londefdef.pm now that we are opening up
449: # the parts of a page.
450: #$r->print('\documentclass{article}
451: # \newcommand{\keephidden}[1]{}
452: # \usepackage[dvips]{graphicx}
453: # \usepackage{epsfig}
454: # \usepackage{calc}
455: # \usepackage{longtable}
456: # \begin{document}');
457: }
458: # ----------------------------------------------------------------- Start table
459: if (($target eq 'tex') || ($target eq 'tex_answer')) {
460: # # $r->print('\begin{longtable}INSERTTHEHEADOFLONGTABLE\endfirsthead\endhead ');
461: if ($number_of_columns le $lcm) {$number_of_columns=$lcm;};
462: } else {
463: $r->print('<table width="100%" cols="'.$lcm.'" border="0">');
464: }
465: # generate rows
466: for ($i=0;$i<=$#rows;$i++) {
467: if ($rows[$i]) {
468: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
469: $r->print("\n<tr>");
470: }
471: my @colcont=split(/\&/,$rows[$i]);
472: my $avespan=$lcm/($#colcont+1);
473: for ($j=0;$j<=$#colcont;$j++) {
474: my $rid=$colcont[$j];
475:
476: my $metainfo =&get_buttons(\%hash,$rid).'<br />';
477: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
478: $r->print('<td colspan="'.$avespan.'"');
479: }
480: if ($cellemb{$rid} eq 'ssi') {
481: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
482: if ($ssibgcolor{$rid}) {
483: $r->print(' bgcolor="'.
484: $ssibgcolor{$rid}.'"');
485: }
486: $r->print('>'.$metainfo.'<font');
487:
488: if ($ssitext{$rid}) {
489: $r->print(' text="'.$ssitext{$rid}.'"');
490: }
491: if ($ssilink{$rid}) {
492: $r->print(' link="'.$ssilink{$rid}.'"');
493: }
494: if ($ssitext{$rid}) {
495: $r->print(' vlink="'.$ssivlink{$rid}.'"');
496: }
497: if ($ssialink{$rid}) {
498: $r->print(' alink="'.$ssialink{$rid}.'"');
499: }
500: $r->print('>');
501: }
502: $r->print($ssibody{$rid});
503: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
504: $r->print('</font>');
505: }
506: if ($env{'course.'.
507: $env{'request.course.id'}.
508: '.pageseparators'} eq 'yes') {
509: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
510: $r->print('<hr />');
511: }
512: }
513: } elsif ($cellemb{$rid} eq 'img') {
514: $r->print('>'.$metainfo.'<img src="'.
515: $hash{'src_'.$rid}.'" />');
516: } elsif ($cellemb{$rid} eq 'emb') {
517: $r->print('>'.$metainfo.'<embed src="'.
518: $hash{'src_'.$rid}.'"></embed>');
519: } elsif (&Apache::lonnet::declutter($hash{'src_'.$rid}) !~/\.(sequence|page)$/) {
520: $r->print($metainfo.'<b>'.$hash{'title_'.$rid}.'</b><br />'.
521: &mt('It is recommended that you use an up-to-date virus scanner before handling this file.').'</p><p><table>'.
522: &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 />');
523: }
524: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
525: $r->print('</td>');
526: } else {
527: # for (my $incol=1;$incol<=$avespan;$incol++) {
528: # $r->print(' & ');
529: # }
530: }
531: }
532: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
533: $r->print('</tr>');
534: } else {
535: # $r->print('REMOVETHEHEADOFLONGTABLE\\\\');
536: }
537: }
538: }
539: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
540: $r->print("\n</table>");
541: } else {
542: # $r->print('\end{longtable}\strut');
543: }
544: # ---------------------------------------------------------------- Submit, etc.
545: if ($nforms) {
546: $r->print(
547: '<input name="all_submit" value="Submit All" type="'.
548: (($nforms>1)?'submit':'hidden').'"></input></form>');
549: }
550: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
551: $r->print(&Apache::loncommon::end_page({'discussion'
552: => 1,}));
553: } else {
554: $r->print('\end{document}'.$number_of_columns);
555: }
556: &Apache::lonnet::symblist($requrl,%symbhash);
557: my ($map,$id,$url)=&Apache::lonnet::decode_symb(&Apache::lonnet::symbread());
558: &Apache::lonnet::symblist($map,'last_known'=>[$url,$id]);
559: # -------------------------------------------------------------------- End page
560: }
561: # ------------------------------------------------------------- End render page
562: } else {
563: &Apache::loncommon::content_type($r,'text/html');
564: $r->send_http_header;
565: &Apache::lonsequence::viewmap($r,$requrl);
566: }
567: # ------------------------------------------------------------------ Untie hash
568: unless (untie(%hash)) {
569: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
570: "Could not untie coursemap $fn (browse).</font>");
571: }
572: # -------------------------------------------------------------------- All done
573: return OK;
574: # ----------------------------------------------- Errors, hash could no be tied
575: }
576: }
577: }
578: &Apache::loncommon::content_type($r,'text/html');
579: $r->send_http_header;
580: &Apache::lonsequence::viewmap($r,$requrl);
581: return OK;
582: }
583:
584: sub get_buttons {
585: my ($hash,$rid) = @_;
586:
587: my $metainfo = '';
588: my $esrc=&Apache::lonnet::declutter($hash->{'src_'.$rid});
589: my ($mapid,$resid)=split(/\./,$rid);
590: my $symb=&Apache::lonnet::encode_symb($hash->{'map_id_'.$mapid},
591: $resid,
592: $hash->{'src_'.$rid});
593: if ($hash->{'encrypted_'.$rid}) {
594: $symb=&Apache::lonenc::encrypted($symb);
595: $esrc=&Apache::lonenc::encrypted($esrc);
596: }
597: if ($hash->{'src_'.$rid} !~ m-^/uploaded/-
598: && !$env{'request.enc'}
599: && ($env{'request.role.adv'}
600: || !$hash->{'encrypted_'.$rid})) {
601: $metainfo .='<a name="'.&escape($symb).'" />'.
602: '<a href="'.$hash->{'src_'.$rid}.'.meta'.'" target="LONcatInfo">'.
603: '<img src="/adm/lonMisc/cat_button.png" class="LC_icon" />'.
604: '</a>';
605: }
606: $metainfo .= '<a href="/adm/evaluate?postdata='.
607: &escape($esrc).
608: '" target="LONcatInfo">'.
609: '<img src="/adm/lonMisc/eval_button.png" class="LC_icon" />'.
610: '</a>';
611: if (($hash->{'src_'.$rid}=~/$LONCAPA::assess_re/) &&
612: ($hash->{'src_'.$rid} !~ m-^/uploaded/-)) {
613:
614: if (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {
615: $metainfo.=
616: '<a href="/adm/grades?symb='.&escape($symb).
617: # '&command=submission" target="LONcatInfo">'.
618: '&command=submission">'.
619: '<img src="/adm/lonMisc/subm_button.png" class="LC_icon" />'.
620: '</a>'.
621: '<a href="/adm/grades?symb='.&escape($symb).
622: # '&command=gradingmenu" target="LONcatInfo">'.
623: '&command=gradingmenu">'.
624: '<img src="/adm/lonMisc/pgrd_button.png" class="LC_icon" />'.
625: '</a>';
626: }
627: if (&Apache::lonnet::allowed('opa',$env{'request.course.id'})) {
628: $metainfo.=
629: '<a href="/adm/parmset?symb='.&escape($symb).
630: # '" target="LONcatInfo">'.
631: '" >'.
632: '<img src="/adm/lonMisc/pprm_button.png" class="LC_icon" />'.
633: '</a>';
634: }
635: }
636: return $metainfo;
637: }
638:
639: 1;
640: __END__
641:
642:
643: =head1 NAME
644:
645: Apache::lonpage - Page Handler
646:
647: =head1 SYNOPSIS
648:
649: Invoked by /etc/httpd/conf/srm.conf:
650:
651: <LocationMatch "^/res/.*\.page$>
652: SetHandler perl-script
653: PerlHandler Apache::lonpage
654: </LocationMatch>
655:
656: =head1 INTRODUCTION
657:
658: This module renders a .page resource.
659:
660: This is part of the LearningOnline Network with CAPA project
661: described at http://www.lon-capa.org.
662:
663: =head1 HANDLER SUBROUTINE
664:
665: This routine is called by Apache and mod_perl.
666:
667: =over 4
668:
669: =item *
670:
671: set document type for header only
672:
673: =item *
674:
675: tie db file
676:
677: =item *
678:
679: render page
680:
681: =item *
682:
683: add to symb list
684:
685: =item *
686:
687: page parms
688:
689: =item *
690:
691: Get SSI output, post parameters
692:
693: =item *
694:
695: SSI cell rendering
696:
697: =item *
698:
699: Deal with Applet codebases
700:
701: =item *
702:
703: Build page
704:
705: =item *
706:
707: send headers
708:
709: =item *
710:
711: start body
712:
713: =item *
714:
715: start form
716:
717: =item *
718:
719: start table
720:
721: =item *
722:
723: submit element, etc, render page, untie hash
724:
725: =back
726:
727: =head1 OTHER SUBROUTINES
728:
729: =over 4
730:
731: =item *
732:
733: euclid() : Euclid's method for determining the greatest common denominator.
734:
735: =item *
736:
737: tracetable() : Build page table.
738:
739: =back
740:
741: =cut
742:
743:
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