1: # The LearningOnline Network with CAPA
2: # Page Handler
3: #
4: # $Id: lonpage.pm,v 1.111.2.9 2020/01/18 01:12:51 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::lonhtmlcommon;
40: use Apache::lonxml();
41: use Apache::lonlocal;
42: use Apache::lonmenu;
43: use Apache::lonhomework;
44: use Apache::lonenc();
45: use HTML::TokeParser;
46: use GDBM_File;
47: use Apache::lonsequence;
48: use lib '/home/httpd/lib/perl/';
49: use LONCAPA;
50:
51:
52: # -------------------------------------------------------------- Module Globals
53: my %hash;
54: my @rows;
55:
56: # ------------------------------------------------------------------ Euclid gcd
57:
58: sub euclid {
59: my ($e,$f)=@_;
60: my $a; my $b; my $r;
61: if ($e>$f) { $b=$e; $r=$f; } else { $r=$e; $b=$f; }
62: while ($r!=0) {
63: $a=$b; $b=$r;
64: $r=$a%$b;
65: }
66: return $b;
67: }
68:
69: # ------------------------------------------------------------ Build page table
70:
71: sub tracetable {
72: my ($sofar,$rid,$beenhere)=@_;
73: my $further=$sofar;
74: my $randomout=0;
75: unless ($env{'request.role.adv'}) {
76: $randomout = $hash{'randomout_'.$rid};
77: }
78: unless ($beenhere=~/\&$rid\&/) {
79: $beenhere.=$rid.'&';
80: unless ($randomout) {
81: if (defined($hash{'is_map_'.$rid})) {
82: if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&
83: (defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) {
84: my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};
85: $sofar=
86: &tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}},
87: '&'.$frid.$beenhere);
88: $sofar++;
89: if ($hash{'src_'.$frid}) {
90: my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$frid});
91: if (($brepriv eq '2') || ($brepriv eq 'F')) {
92: if (defined($rows[$sofar])) {
93: $rows[$sofar].='&'.$frid;
94: } else {
95: $rows[$sofar]=$frid;
96: }
97: }
98: }
99: }
100: } else {
101: $sofar++;
102: if ($hash{'src_'.$rid}) {
103: my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$rid});
104: if (($brepriv eq '2') || ($brepriv eq 'F')) {
105: if (defined($rows[$sofar])) {
106: $rows[$sofar].='&'.$rid;
107: } else {
108: $rows[$sofar]=$rid;
109: }
110: }
111: }
112: }
113: }
114:
115: if (defined($hash{'to_'.$rid})) {
116: my $mincond=1;
117: my $next='';
118: foreach (split(/\,/,$hash{'to_'.$rid})) {
119: my $thiscond=
120: &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}});
121: if ($thiscond>=$mincond) {
122: if ($next) {
123: $next.=','.$_.':'.$thiscond;
124: } else {
125: $next=$_.':'.$thiscond;
126: }
127: if ($thiscond>$mincond) { $mincond=$thiscond; }
128: }
129: }
130: foreach (split(/\,/,$next)) {
131: my ($linkid,$condval)=split(/\:/,$_);
132: if ($condval>=$mincond) {
133: my $now=&tracetable($sofar,$hash{'goesto_'.$linkid},$beenhere);
134: if ($now>$further) { $further=$now; }
135: }
136: }
137: }
138: }
139: return $further;
140: }
141:
142: # ================================================================ Main Handler
143:
144: sub handler {
145: my $r=shift;
146:
147: # ------------------------------------------- Set document type for header only
148:
149: if ($r->header_only) {
150: if ($env{'browser.mathml'}) {
151: &Apache::loncommon::content_type($r,'text/xml');
152: } else {
153: &Apache::loncommon::content_type($r,'text/html');
154: }
155: $r->send_http_header;
156: return OK;
157: }
158:
159: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
160: ['forceselect','launch']);
161: my $number_of_columns = 1;
162: my $requrl=$r->uri;
163: my $target = $env{'form.grade_target'};
164:
165: # Short term solution: define target as 'tex_answer' when retrieving answers
166: # for resources in a .page when generating printouts.
167: # A better long-term fix would be to modify the way problem rendering, and
168: # answer rendering are retrieved for individual resources when printing a .page,
169: # so rendered problem and answer are sequential for individual resources in
170: # the .page
171: #
172: if ($target eq 'answer') {
173: if ($env{'form.answer_output_mode'} eq 'tex') {
174: $target = 'tex_answer';
175: }
176: }
177: # &Apache::lonnet::logthis("Got a target of $target");
178: if ($target eq 'meta') {
179: &Apache::loncommon::content_type($r,'text/html');
180: $r->send_http_header;
181: return OK;
182: }
183: # ----------------------------------------------------------------- Tie db file
184: if (($env{'request.course.fn'}) && (!$env{'form.forceselect'})) {
185: my $fn=$env{'request.course.fn'};
186: if (-e "$fn.db") {
187: my %buttonshide;
188: my $hostname = $r->hostname();
189: if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) {
190: # ------------------------------------------------------------------- Hash tied
191: my $firstres=$hash{'map_start_'.$requrl};
192: my $lastres=$hash{'map_finish_'.$requrl};
193: if (($firstres) && ($lastres)) {
194: # ------------------------------------------------------------- Countdown Timer
195: my $now = time;
196: my ($pagefirstaccess,%hastimeleft,%countdowndisp);
197: my ($pagesymb,$courseid,$domain,$name)=&Apache::lonnet::whichuser();
198: if ($pagesymb && ($courseid ne '') && ($domain ne '') && ($name ne '')) {
199: my %times=&Apache::lonnet::get('firstaccesstimes',
200: [$courseid."\0".$pagesymb],
201: $domain,$name);
202: if ($times{$courseid."\0".$pagesymb} =~ /^\d+$/) {
203: $pagefirstaccess = $times{$courseid."\0".$pagesymb};
204: }
205: }
206: # ----------------------------------------------------------------- Render page
207:
208: @rows=();
209:
210: &tracetable(0,$firstres,'&');
211:
212: # ------------------------------------------------------------ Add to symb list
213:
214: my $i;
215: my %symbhash=();
216: for ($i=0;$i<=$#rows;$i++) {
217: if ($rows[$i]) {
218: my @colcont=split(/\&/,$rows[$i]);
219: foreach my $rid (@colcont) {
220: my ($mapid,$resid)=split(/\./,$rid);
221: $symbhash{$hash{'src_'.$rid}}=
222: [$hash{'src_'.$rid},$resid];
223: }
224: }
225: }
226: &Apache::lonnet::symblist($requrl,%symbhash);
227:
228: # ------------------------------------------------------------------ Page parms
229:
230: my $j;
231: my $lcm=1;
232: my $contents=0;
233: my $nforms=0;
234: my $nuploads=0;
235: my $ntimers=0;
236: my %turninpaths;
237: my %multiresps;
238: my $turninparent;
239:
240: my %ssibody=();
241: my %ssibgcolor=();
242: my %ssitext=();
243: my %ssilink=();
244: my %ssivlink=();
245: my %ssialink=();
246:
247: my %cellemb=();
248: my %cellexternal=();
249:
250: my $allscript='';
251: my $allmeta='';
252:
253: my $isxml=0;
254: my $xmlheader='';
255: my $xmlbody='';
256:
257: # --------------------------------------------- Get SSI output, post parameters
258:
259: for ($i=0;$i<=$#rows;$i++) {
260: if ($rows[$i]) {
261: $contents++;
262: my @colcont=split(/\&/,$rows[$i]);
263: $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1));
264: foreach (@colcont) {
265: my $src=$hash{'src_'.$_};
266: my $plainsrc = $src;
267: my ($extension)=($src=~/\.(\w+)$/);
268: $cellexternal{$_}=($hash{'ext_'.$_} eq 'true:');
269: if ($hash{'encrypted_'.$_}) {
270: $src=&Apache::lonenc::encrypted($src);
271: }
272: my ($mapid,$resid)=split(/\./,$_);
273: my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$src);
274: unless ($env{'request.role.adv'}) {
275: $buttonshide{$symb} = &Apache::lonnet::EXT("resource.0.buttonshide",$symb);
276: }
277: $cellemb{$_}=
278: &Apache::loncommon::fileembstyle($extension);
279: if ($cellexternal{$_}) {
280: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
281: $ssibody{$_} = <<ENDEXT;
282: <iframe src="$src" width="100%">No iframe support!</iframe>
283: ENDEXT
284: }
285: } elsif ($cellemb{$_} eq 'ssi') {
286: # --------------------------------------------------------- This is an SSI cell
287: my $prefix='p_'.$_.'_';
288: my $idprefix='p_'.join('_',($mapid,$resid,''));
289: my %posthash=('request.prefix' => $prefix,
290: 'LONCAPA_INTERNAL_no_discussion' => 'true',
291: 'symb' => $symb);
292: if (($env{'form.grade_target'} eq 'tex') ||
293: ($env{'form.answer_output_mode'} eq 'tex')) {
294: $posthash{'grade_target'}=$env{'form.grade_target'};
295: $posthash{'textwidth'}=$env{'form.textwidth'};
296: $posthash{'problem_split'}=$env{'form.problem_split'};
297: $posthash{'latex_type'}=$env{'form.latex_type'};
298: $posthash{'rndseed'}=$env{'form.rndseed'};
299: $posthash{'answer_output_mode'} = $env{'form.answer_output_mode'};
300: }
301: my $submitted=$env{'form.all_submit_pressed'};
302: if (!$submitted) {
303: foreach my $key (keys(%env)) {
304: if ($key=~/^\Qform.$prefix\Esubmit_(.+)_pressed$/) {
305: if ($env{$key}) {
306: $submitted=1;
307: last;
308: }
309: }
310: }
311: }
312: if ($submitted) {
313: foreach my $key (keys(%env)) {
314: if ($key=~/^\Qform.$prefix\E/) {
315: my $name=$key;
316: $name=~s/^\Qform.$prefix\E//;
317: $posthash{$name}=$env{$key};
318: }
319: }
320: if ($env{'form.all_submit_pressed'}) {
321: $posthash{'all_submit'}='yes';
322: }
323: } elsif ($env{'form.'.$prefix.'markaccess'} eq 'yes') {
324: $posthash{'markaccess'} = $env{'form.'.$prefix.'markaccess'};
325: }
326: if ($env{'environment.remote'} eq 'on') {
327: $posthash{'inhibitmenu'} = 'yes';
328: }
329: my $output=Apache::lonnet::ssi($src,%posthash);
330: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
331: if (($target eq 'tex') || ($target eq 'tex_answer')) {
332: $output =~ s/^([^&]+)\\begin\{document}//;
333: $output =~ s/\\end\{document}//;
334: # $output = '\parbox{\minipagewidth}{ '.$output.' }';
335: #some additional cleanup necessary for LateX (due to limitations of table environment
336: $output =~ s/(\\vskip\s*\d+mm)\s*(\\\\)+/$1/g;
337: }
338: my $matheditor;
339: if ($output =~ /\Qjavascript:LC_mathedit_HWVAL_\E/) {
340: $matheditor = 'dragmath';
341: } elsif ($output =~ /LCmathField/) {
342: $matheditor = 'lcmath';
343: }
344: my $parser=HTML::TokeParser->new(\$output);
345: my $token;
346: my $thisdir=$src;
347: my $bodydef=0;
348: my $thisxml=0;
349: my @rlinks=();
350: if ($output=~/\?xml/) {
351: $isxml=1;
352: $thisxml=1;
353: $output=~
354: /((?:\<(?:\?xml|\!DOC|html)[^\>]*(?:\>|\>\]\>)\s*)+)\<body[^\>]*\>/si;
355: $xmlheader=$1;
356: }
357: while ($token=$parser->get_token) {
358: if ($token->[0] eq 'S') {
359: if ($token->[1] eq 'a') {
360: if ($token->[2]->{'href'}) {
361: $rlinks[$#rlinks+1]=
362: $token->[2]->{'href'};
363: }
364: } elsif ($token->[1] eq 'img') {
365: $rlinks[$#rlinks+1]=
366: $token->[2]->{'src'};
367: } elsif ($token->[1] eq 'embed') {
368: $rlinks[$#rlinks+1]=
369: $token->[2]->{'src'};
370: } elsif ($token->[1] eq 'base') {
371: $thisdir=$token->[2]->{'href'};
372: } elsif ($token->[1] eq 'body') {
373: $bodydef=1;
374: $ssibgcolor{$_}=$token->[2]->{'bgcolor'};
375: $ssitext{$_}=$token->[2]->{'text'};
376: $ssilink{$_}=$token->[2]->{'link'};
377: $ssivlink{$_}=$token->[2]->{'vlink'};
378: $ssialink{$_}=$token->[2]->{'alink'};
379: if ($thisxml) {
380: $xmlbody=$token->[4];
381: }
382: } elsif ($token->[1] eq 'meta') {
383: if ($token->[4] !~ m:/>$:) {
384: $allmeta.="\n".$token->[4].'</meta>';
385: } else {
386: $allmeta.="\n".$token->[4];
387: }
388: } elsif (($token->[1] eq 'script') &&
389: ($bodydef==0)) {
390: $allscript.="\n\n"
391: .$parser->get_text('/script');
392: }
393: }
394: }
395: if ($output=~/\<body[^\>]*\>(.*)/si) {
396: $output=$1;
397: }
398: $output=~s/\<\/body\>.*//si;
399: if ($output=~/\<form/si) {
400: my $hastimer;
401: $nforms++;
402: $output=~s/\<form[^\>]*\>//gsi;
403: $output=~s/\<\/form[^\>]*\>//gsi;
404: if ($output=~/\<input[^\>]+name\s*=\s*[\'\"]*HWFILE/) {
405: $nuploads++;
406: }
407: if ($output=~/\<input[^\>]+name\s*=\s*[\'\"]*accessbutton/) {
408: $ntimers++;
409: $hastimer = 1;
410: }
411: $output=~
412: s/\<((?:input|select|button|textarea)[^\>]+)name\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 name="$prefix$2" $3\>/gsi;
413: $output=~
414: s/\<((?:input|select|button|textarea)[^\>]+)id\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 id="$idprefix$2" $3\>/gsi;
415: $output=~
416: s/(\Qthis.form.elements['\E)(HW(?:VAL|CHK)_[^']+\'\]\.(?:value=\'|checked))/$1$prefix$2/gsi;
417: if ($hastimer) {
418: $output=~
419: s/\<(input[^\>]+name=\Q"$prefix\Eaccessbutton"[^\>]+)(?:\Qdocument.markaccess.submit();\E)([^\>]*)\>/\<$1pageTimer(this.form,'$prefix')$2\>/gsi;
420: $output=~ s/\<(input[^\>]+name=\Q"$prefix\Emarkaccess"[^\>]+value=["'])(?:yes)(['"][^\>]*)\>/\<$1$2\>/gsi;
421: }
422: if ($matheditor eq 'dragmath') {
423: $output=~
424: s/(\Qjavascript:LC_mathedit_\E)(HWVAL_)([^'"]+?)(\(['"]*)(\QHWVAL_\E\3['"]\)\;void\(0\)\;)/$1$idprefix$2$3$4$idprefix$5/g;
425: $output=~
426: s/(function\s+LC_mathedit_)(HWVAL_)([^'"]+?)(\s+\(LCtextline\))/$1$idprefix$2$3$4/g;
427: } elsif ($matheditor eq 'lcmath') {
428: $output=~
429: s/(var\s+LCmathField\s+=\s+document\.getElementById\(['"])([^'"]+?)(['"]\)\;)/$1$idprefix$2$3/g;
430: }
431: $output=~
432: s/(\Q<div id="msg_\E)(\Qsubmit_\E)([^"]*)(\Q" style="display:none">\E)/<input type="hidden" name="$prefix$2$3_pressed" id="$idprefix$2$3_pressed" value="" \/>$1$idprefix$2$3$4/g;
433: $output=~
434: s/(\Q<td class="LC_status_\E)(\Qsubmit_\E)([^\"]*)(\s*[^\"]*"\>)/$1$idprefix$2$3$4/g;
435: if ($nuploads) {
436: ($turninpaths{$prefix},$multiresps{$prefix}) =
437: &Apache::loncommon::get_turnedin_filepath($symb,$env{'user.name'},$env{'user.domain'});
438: if ($turninparent eq '') {
439: $turninparent = $turninpaths{$prefix};
440: $turninparent =~ s{(/[^/]+)$}{};
441: }
442: }
443: $output=~
444: s/\<((?:input|select)[^\>]+\Qjavascript:setSubmittedPart\E)\(\s*[\'\"]([^\'\"]+)[\'\"]*\s*\)/\<$1('$2','$prefix')/gsi;
445: $output=~
446: s/\<(input[^\>]+\Qonfocus=\"javascript:disableAutoComplete\E)\(\'([^\']+)\'\)(;\")/\<$1('$idprefix$2')$3/gsi;
447: unless ($hastimer) {
448: if ($plainsrc =~ /$LONCAPA::assess_re/) {
449: %Apache::lonhomework::history =
450: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
451: my $type = 'problem';
452: if ($extension eq 'task') {
453: $type = 'Task';
454: }
455: my ($status,$accessmsg,$slot_name,$slot) =
456: &Apache::lonhomework::check_slot_access('0',$type,$symb);
457: undef(%Apache::lonhomework::history);
458: my $probstatus = &Apache::lonnet::EXT("resource.0.problemstatus",$symb);
459: if (($status eq 'CAN_ANSWER') || (($status eq 'CANNOT_ANSWER') &&
460: (($probstatus eq 'no') || ($probstatus eq 'no_feedback_ever')))) {
461: my ($slothastime,$timerhastime);
462: if ($slot_name ne '') {
463: if (ref($slot) eq 'HASH') {
464: if (($slot->{'starttime'} < $now) &&
465: ($slot->{'endtime'} > $now)) {
466: $slothastime = $now - $slot->{'endtime'};
467: }
468: }
469: }
470: my $duedate = &Apache::lonnet::EXT("resource.0.duedate",$symb);
471: my @interval=&Apache::lonnet::EXT("resource.0.interval",$symb);
472: if (@interval > 1) {
473: my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
474: if ($first_access > 0) {
475: my $timeremains = $first_access+$interval[0] - $now;
476: if ($timeremains > 0) {
477: $timerhastime = $timeremains;
478: }
479: }
480: }
481: if (($duedate && $duedate > $now) ||
482: (!$duedate && $timerhastime > 0) ||
483: ($slot_name ne '' && $slothastime)) {
484: if ((@interval > 1 && $timerhastime) ||
485: ($type eq 'Task' && $slothastime)) {
486: $countdowndisp{$symb} = 'inline';
487: if ((@interval > 1) && ($timerhastime)) {
488: $hastimeleft{$symb} = $timerhastime;
489: } else {
490: $hastimeleft{$symb} = $slothastime;
491: }
492: } else {
493: $hastimeleft{$symb} = $duedate - $now;
494: $countdowndisp{$symb} = 'none';
495: }
496: }
497: }
498: }
499: }
500: }
501: $thisdir=~s/\/[^\/]*$//;
502: foreach (@rlinks) {
503: unless (($_=~/^https?\:\/\//i) ||
504: ($_=~/^\//) ||
505: ($_=~/^javascript:/i) ||
506: ($_=~/^mailto:/i) ||
507: ($_=~/^\#/)) {
508: my $newlocation=
509: &Apache::lonnet::hreflocation($thisdir,$_);
510: $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
511: }
512: }
513: # -------------------------------------------------- Deal with Applet codebases
514: $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
515: $ssibody{$_}=$output;
516: # ---------------------------------------------------------------- End SSI cell
517: }
518: }
519: }
520: }
521: unless ($contents) {
522: &Apache::loncommon::content_type($r,'text/html');
523: $r->send_http_header;
524: $r->print(&Apache::loncommon::start_page(undef,undef,
525: {'force_register' => 1}));
526: $r->print(&mt('This page is either empty or it only contains resources that are currently hidden').'. ');
527: $r->print('<br /><br />'.&mt('Please use the LON-CAPA navigation arrows to move to another item in the course').
528: &Apache::loncommon::end_page());
529: } else {
530: # ------------------------------------------------------------------ Build page
531:
532: # ---------------------------------------------------------------- Send headers
533: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
534: if ($isxml) {
535: &Apache::loncommon::content_type($r,'text/xml');
536: } else {
537: &Apache::loncommon::content_type($r,'text/html');
538: }
539: $r->send_http_header;
540: # ------------------------------------------------------------------------ Head
541: if ($allscript) {
542: $allscript =
543: "\n".'<script type="text/javascript">'."\n".
544: $allscript.
545: "\n</script>\n";
546: }
547: if (($nforms) && ($nuploads)) {
548: $allscript .= &Apache::lonhtmlcommon::file_submissionchk_js(\%turninpaths,\%multiresps).
549: '<script type="text/javascript" '.
550: 'src="/res/adm/includes/file_upload.js"></script>';
551: }
552: if (($nforms) && (&Apache::lonhtmlcommon::htmlareabrowser())) {
553: my %textarea_args = (
554: dragmath => 'math',
555: );
556: $allscript .= &Apache::lonhtmlcommon::htmlareaselectactive(\%textarea_args);
557: }
558: if ($ntimers) {
559: $allscript .= '<script type="text/javascript">'."\n".
560: '// <![CDATA['."\n".
561: 'function pageTimer(form,prefix) {'."\n".
562: " form.elements[prefix+'markaccess'].value = 'yes';\n".
563: " form.submit();\n".
564: '}'."\n".
565: '// ]]>'.
566: "\n</script>\n";
567: }
568: if (keys(%hastimeleft)) {
569: my (%uniquetimes,%uniquedisplays);
570: foreach my $item (values(%hastimeleft)) {
571: if (exists($uniquetimes{$item})) {
572: $uniquetimes{$item} ++;
573: } else {
574: $uniquetimes{$item} = 1;
575: }
576: }
577: if (keys(%uniquetimes) == 1) {
578: my (%uniquedisplays,%uniquedones,$currdisp);
579: if (keys(%countdowndisp)) {
580: foreach my $item (values(%countdowndisp)) {
581: if (exists($uniquedisplays{$item})) {
582: $uniquedisplays{$item} ++;
583: } else {
584: $uniquedisplays{$item} = 1;
585: }
586: }
587: my @countdowndisplay = keys(%uniquedisplays);
588: if (scalar(@countdowndisplay) == 1) {
589: $currdisp = $countdowndisplay[0];
590: }
591: }
592: &add_countdown_timer($currdisp);
593: }
594: }
595: my $pagebuttonshide;
596: if (keys(%buttonshide)) {
597: my %uniquebuttonhide;
598: foreach my $item (values(%buttonshide)) {
599: if (exists($uniquebuttonhide{$item})) {
600: $uniquebuttonhide{$item} ++;
601: } else {
602: $uniquebuttonhide{$item} = 1;
603: }
604: }
605: if (keys(%uniquebuttonhide) == 1) {
606: if (lc((keys(%uniquebuttonhide))[0]) eq 'yes') {
607: $pagebuttonshide = 'yes';
608: }
609: }
610: }
611: # ------------------------------------------------------------------ Start body
612: $r->print(&Apache::loncommon::start_page(undef,$allscript,
613: {'force_register' => 1,
614: 'bgcolor' => '#ffffff',
615: 'hide_buttons' => $pagebuttonshide}));
616: # ------------------------------------------------------------------ Start form
617: if ($nforms) {
618: my $fmtag = '<form name="lonhomework" method="post" enctype="multipart/form-data"';
619: if ($nuploads) {
620: my $multi;
621: if ($nuploads > 1) {
622: $multi = 1;
623: }
624: $fmtag .= 'onsubmit="return file_submission_check(this,'."'$turninparent','$multi'".');"';
625: }
626: $fmtag .= ' action="'.
627: &Apache::lonenc::check_encrypt($requrl)
628: .'" id="LC_page">';
629: $r->print($fmtag);
630: }
631: } elsif (($target eq 'tex') || ($target eq 'tex_answer')) {
632: # I think this is not needed as the header
633: # will be put in for each of the page parts
634: # by the londefdef.pm now that we are opening up
635: # the parts of a page.
636: #$r->print('\documentclass{article}
637: # \newcommand{\keephidden}[1]{}
638: # \usepackage[dvips]{graphicx}
639: # \usepackage{epsfig}
640: # \usepackage{calc}
641: # \usepackage{longtable}
642: # \begin{document}');
643: }
644: # ----------------------------------------------------------------- Start table
645: if (($target eq 'tex') || ($target eq 'tex_answer')) {
646: # # $r->print('\begin{longtable}INSERTTHEHEADOFLONGTABLE\endfirsthead\endhead ');
647: if ($number_of_columns le $lcm) {$number_of_columns=$lcm;};
648: } else {
649: $r->print('<table width="100%" cols="'.$lcm.'" border="0">');
650: }
651: # generate rows
652: for ($i=0;$i<=$#rows;$i++) {
653: if ($rows[$i]) {
654: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
655: $r->print("\n<tr>");
656: }
657: my @colcont=split(/\&/,$rows[$i]);
658: my $avespan=$lcm/($#colcont+1);
659: for ($j=0;$j<=$#colcont;$j++) {
660: my $rid=$colcont[$j];
661: my $metainfo =&get_buttons(\%hash,$rid,\%buttonshide,$hostname).'<br />';
662: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
663: $r->print('<td colspan="'.$avespan.'"');
664: }
665: if (($cellemb{$rid} eq 'ssi') || ($cellexternal{$rid})) {
666: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
667: if ($ssibgcolor{$rid}) {
668: $r->print(' bgcolor="'.
669: $ssibgcolor{$rid}.'"');
670: }
671: $r->print('>'.$metainfo.'<font');
672:
673: if ($ssitext{$rid}) {
674: $r->print(' text="'.$ssitext{$rid}.'"');
675: }
676: if ($ssilink{$rid}) {
677: $r->print(' link="'.$ssilink{$rid}.'"');
678: }
679: if ($ssitext{$rid}) {
680: $r->print(' vlink="'.$ssivlink{$rid}.'"');
681: }
682: if ($ssialink{$rid}) {
683: $r->print(' alink="'.$ssialink{$rid}.'"');
684: }
685: $r->print('>');
686: }
687: unless (($cellexternal{$rid}) &&
688: ($target eq 'tex') && ($target eq 'tex_answer')) {
689: $r->print($ssibody{$rid});
690: }
691: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
692: $r->print('</font>');
693: }
694: if ($env{'course.'.
695: $env{'request.course.id'}.
696: '.pageseparators'} eq 'yes') {
697: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
698: $r->print('<hr />');
699: }
700: }
701: } elsif ($cellemb{$rid} eq 'img') {
702: $r->print('>'.$metainfo.'<img src="'.
703: $hash{'src_'.$rid}.'" />');
704: } elsif ($cellemb{$rid} eq 'emb') {
705: $r->print('>'.$metainfo.'<embed src="'.
706: $hash{'src_'.$rid}.'"></embed>');
707: } elsif (&Apache::lonnet::declutter($hash{'src_'.$rid}) !~/\.(sequence|page)$/) {
708: $r->print($metainfo.'<b>'.$hash{'title_'.$rid}.'</b><br />');
709: unless ($cellemb{$rid} eq 'wrp') {
710: $r->print(&mt('It is recommended that you use an up-to-date virus scanner before handling this file.'));
711: }
712: $r->print('</p><p><table>'.
713: &Apache::londocs::entryline(0,
714: &mt("Click to download or use your browser's Save Link function"),
715: '/'.&Apache::lonnet::declutter($hash{'src_'.$rid})).
716: '</table></p><br />');
717: }
718: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
719: $r->print('</td>');
720: } else {
721: # for (my $incol=1;$incol<=$avespan;$incol++) {
722: # $r->print(' & ');
723: # }
724: }
725: }
726: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
727: $r->print('</tr>');
728: } else {
729: # $r->print('REMOVETHEHEADOFLONGTABLE\\\\');
730: }
731: }
732: }
733: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
734: $r->print("\n</table>");
735: } else {
736: # $r->print('\end{longtable}\strut');
737: }
738: # ---------------------------------------------------------------- Submit, etc.
739: if ($nforms) {
740: my $class;
741: if ($nforms > 1) {
742: $class = ' class="LC_hwk_submit"';
743: if ($ntimers) {
744: $nforms = 1;
745: $class = '';
746: }
747: }
748: $r->print(
749: '<input name="all_submit" value="'.&mt('Submit All').'" type="'.
750: (($nforms>1)?'submit':'hidden').'"'.$class.' id="all_submit" />'.
751: '<input type="hidden" name="all_submit_pressed" '.
752: 'id="all_submit_pressed" value="" />'.
753: '<div id="msg_all_submit" style="display:none">'.
754: &mt('Processing your submission ...').'</div></form>');
755: }
756: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
757: $r->print(&Apache::loncommon::end_page({'discussion'
758: => 1,}));
759: } else {
760: $r->print('\end{document}'.$number_of_columns);
761: }
762: &Apache::lonnet::symblist($requrl,%symbhash);
763: my ($map,$id,$url)=&Apache::lonnet::decode_symb(&Apache::lonnet::symbread());
764: &Apache::lonnet::symblist($map,'last_known'=>[$url,$id]);
765: # -------------------------------------------------------------------- End page
766: }
767: # ------------------------------------------------------------- End render page
768: } else {
769: &Apache::loncommon::content_type($r,'text/html');
770: $r->send_http_header;
771: &Apache::lonsequence::viewmap($r,$requrl);
772: }
773: # ------------------------------------------------------------------ Untie hash
774: unless (untie(%hash)) {
775: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
776: "Could not untie coursemap $fn (browse).</font>");
777: }
778: # -------------------------------------------------------------------- All done
779: return OK;
780: # ----------------------------------------------- Errors, hash could no be tied
781: }
782: }
783: }
784: &Apache::loncommon::content_type($r,'text/html');
785: $r->send_http_header;
786: &Apache::lonsequence::viewmap($r,$requrl);
787: return OK;
788: }
789:
790: sub get_buttons {
791: my ($hash,$rid,$buttonshide,$hostname) = @_;
792:
793: my $metainfo = '';
794: my $esrc=&Apache::lonnet::declutter($hash->{'src_'.$rid});
795: my ($mapid,$resid)=split(/\./,$rid);
796: my $symb=&Apache::lonnet::encode_symb($hash->{'map_id_'.$mapid},
797: $resid,
798: $hash->{'src_'.$rid});
799: unless ($env{'request.role.adv'}) {
800: if ($buttonshide->{$symb} eq 'yes') {
801: return;
802: }
803: }
804: if ($hash->{'encrypted_'.$rid}) {
805: $symb=&Apache::lonenc::encrypted($symb);
806: $esrc=&Apache::lonenc::encrypted($esrc);
807: }
808: if ($hash->{'src_'.$rid} !~ m-^/uploaded/-
809: && $hash->{'src_'.$rid} !~ m{^https?://}
810: && !$env{'request.enc'}
811: && ($env{'request.role.adv'}
812: || !$hash->{'encrypted_'.$rid})) {
813: $metainfo .='<a name="'.&escape($symb).'" />'.
814: '<a href="'.$hash->{'src_'.$rid}.'.meta'.'" target="LONcatInfo">'.
815: '<img src="/res/adm/pages/catalog.png" class="LC_icon"'.
816: ' alt="'.&mt('Show Metadata').'"'.
817: ' title="'.&mt('Show Metadata').'" />'.
818: '</a>';
819: }
820: if (($hash->{'src_'.$rid} !~ m{^/uploaded/}) &&
821: ($hash->{'src_'.$rid} !~ m{^https?://})) {
822: $metainfo .= '<a href="/adm/evaluate?postdata='.
823: &escape($esrc).
824: '" target="LONcatInfo">'.
825: '<img src="/res/adm/pages/eval.png" class="LC_icon"'.
826: ' alt="'.&mt('Provide my evaluation of this resource').'"'.
827: ' title="'.&mt('Provide my evaluation of this resource').'" />'.
828: '</a>';
829: }
830: if (($hash->{'src_'.$rid}=~/$LONCAPA::assess_re/) &&
831: ($hash->{'src_'.$rid} !~ m-^/uploaded/-)) {
832:
833: if (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {
834: $metainfo.=
835: '<a href="/adm/grades?symb='.&escape($symb).
836: # '&command=submission" target="LONcatInfo">'.
837: '&command=submission">'.
838: '<img src="/adm/lonMisc/subm_button.png" class="LC_icon"'.
839: ' alt="'.&mt('View Submissions for a Student or a Group of Students').'"'.
840: ' title="'.&mt('View Submissions for a Student or a Group of Students').'" />'.
841: '</a>'.
842: '<a href="/adm/grades?symb='.&escape($symb).
843: # '&command=gradingmenu" target="LONcatInfo">'.
844: '&command=gradingmenu">'.
845: '<img src="/res/adm/pages/pgrd.png" class="LC_icon"'.
846: ' alt="'.&mt('Content Grades').'"'.
847: ' title="'.&mt('Content Grades').'" />'.
848: '</a>';
849: }
850: if (&Apache::lonnet::allowed('opa',$env{'request.course.id'})) {
851: $metainfo.=
852: '<a href="/adm/parmset?symb='.&escape($symb).
853: # '" target="LONcatInfo">'.
854: '" >'.
855: '<img src="/adm/lonMisc/pprm_button.png" class="LC_icon"'.
856: ' alt="'.&mt('Content Settings').'"'.
857: ' title="'.&mt('Content Settings').'" />'.
858: '</a>';
859: }
860: }
861: if ($env{'request.course.id'}) {
862: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
863: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
864: my $file=&Apache::lonnet::declutter($hash->{'src_'.$rid});
865: my $editbutton = '';
866: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
867: my ($cfile,$home,$switchserver,$forceedit,$forceview) =
868: &Apache::lonnet::can_edit_resource($file,$cnum,$cdom,$hash->{'src_'.$rid},$symb);
869: if ($cfile ne '') {
870: my $jscall = &Apache::lonhtmlcommon::jump_to_editres($cfile,$home,$switchserver,
871: $forceedit,1,$symb,undef,
872: &escape($env{'form.title'},
873: $hostname));
874: if ($jscall) {
875: $editbutton = 1;
876: my $icon = 'pcstr.png';
877: my $label = &mt('Edit');
878: my $title = &mt('Edit this resource');
879: my $pic = '<img src="'.&Apache::loncommon::lonhttpdurl('/res/adm/pages/'.$icon).'"'.
880: ' class="LC_icon" alt="'.$label.'" title="'.$title.'" />';
881: $metainfo .= ' <a href="javascript:'.$jscall.';">'.$pic.'</a>';
882: }
883: }
884: }
885: if ((!$editbutton) && ($file=~/$LONCAPA::assess_re/)) {
886: my $url = &Apache::lonnet::clutter($file);
887: my $viewsrcbutton;
888: if ((&Apache::lonnet::allowed('cre','/')) &&
889: (&Apache::lonnet::metadata($url,'sourceavail') eq 'open')) {
890: $viewsrcbutton = 1;
891: } elsif (&Apache::lonnet::allowed('vxc',$env{'request.course.id'})) {
892: if ($url =~ m{^\Q/res/$cdom/\E($LONCAPA::match_username)/}) {
893: my $auname = $1;
894: if (($env{'request.course.adhocsrcaccess'} ne '') &&
895: (grep(/^\Q$auname\E$/,split(/,/,$env{'request.course.adhocsrcaccess'})))) {
896: $viewsrcbutton = 1;
897: }
898: }
899: }
900: if ($viewsrcbutton) {
901: my $icon = 'pcstr.png';
902: my $label = &mt('View Source');
903: my $title = &mt('View source code');
904: my $jsrid = $rid;
905: $jsrid =~ s/\./_/g;
906: my $showurl = &escape(&Apache::lonenc::check_encrypt($url));
907: my $pic = '<img src="'.&Apache::loncommon::lonhttpdurl('/res/adm/pages/'.$icon).'"'.
908: ' class="LC_icon" alt="'.$label.'" title="'.$title.'" />';
909: $metainfo .= ' <a href="javascript:open_source_'.$jsrid.'();">'.$pic.'</a>'."\n".
910: '<script type="text/javascript">'."\n".
911: "function open_source_$jsrid() {\n".
912: " sourcewin=window.open('/adm/source?inhibitmenu=yes&viewonly=1&filename=$showurl','LONsource',".
913: "'height=500,width=600,resizable=yes,location=no,menubar=no,toolbar=no,scrollbars=yes');\n".
914: "}\n".
915: "</script>\n";
916: }
917: }
918: }
919: return $metainfo;
920: }
921:
922: sub add_countdown_timer {
923: my ($currdisp) = @_;
924: my ($collapse,$expand,$alttxt,$title);
925: if ($currdisp eq 'inline') {
926: $collapse = '► ';
927: } else {
928: $expand = '◄ ';
929: }
930: unless ($env{'environment.icons'} eq 'iconsonly') {
931: $alttxt = &mt('Timer');
932: $title = $alttxt.' ';
933: }
934: my $desc = &mt('Countdown to due date/time');
935: my $output = <<END;
936: <a href="javascript:toggleCountdown();" class="LC_menubuttons_link">
937: <span id="ddcountcollapse" class="LC_menubuttons_inline_text">
938: $collapse
939: </span></a>
940: <span id="duedatecountdown" class="LC_menubuttons_inline_text" style="display: $currdisp;"></span>
941: <a href="javascript:toggleCountdown();" class="LC_menubuttons_link">
942: <span id="ddcountexpand" class="LC_menubuttons_inline_text" >$expand</span>
943: <img src="/res/adm/pages/timer.png" title="$desc" class="LC_icon" alt="$alttxt" /><span class="LC_menubuttons_inline_text">$title</span></a>
944: END
945: &Apache::lonhtmlcommon::clear_breadcrumb_tools();
946: &Apache::lonhtmlcommon::add_breadcrumb_tool('tools',$output);
947: return;
948: }
949:
950:
951: 1;
952: __END__
953:
954:
955: =head1 NAME
956:
957: Apache::lonpage - Page Handler
958:
959: =head1 SYNOPSIS
960:
961: Invoked by /etc/httpd/conf/srm.conf:
962:
963: <LocationMatch "^/res/.*\.page$>
964: SetHandler perl-script
965: PerlHandler Apache::lonpage
966: </LocationMatch>
967:
968: =head1 INTRODUCTION
969:
970: This module renders a .page resource.
971:
972: This is part of the LearningOnline Network with CAPA project
973: described at http://www.lon-capa.org.
974:
975: =head1 HANDLER SUBROUTINE
976:
977: This routine is called by Apache and mod_perl.
978:
979: =over 4
980:
981: =item *
982:
983: set document type for header only
984:
985: =item *
986:
987: tie db file
988:
989: =item *
990:
991: render page
992:
993: =item *
994:
995: add to symb list
996:
997: =item *
998:
999: page parms
1000:
1001: =item *
1002:
1003: Get SSI output, post parameters
1004:
1005: =item *
1006:
1007: SSI cell rendering
1008:
1009: =item *
1010:
1011: Deal with Applet codebases
1012:
1013: =item *
1014:
1015: Build page
1016:
1017: =item *
1018:
1019: send headers
1020:
1021: =item *
1022:
1023: start body
1024:
1025: =item *
1026:
1027: start form
1028:
1029: =item *
1030:
1031: start table
1032:
1033: =item *
1034:
1035: submit element, etc, render page, untie hash
1036:
1037: =back
1038:
1039: =head1 OTHER SUBROUTINES
1040:
1041: =over 4
1042:
1043: =item *
1044:
1045: euclid() : Euclid's method for determining the greatest common denominator.
1046:
1047: =item *
1048:
1049: tracetable() : Build page table.
1050:
1051: =back
1052:
1053: =cut
1054:
1055:
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