1: # The LearningOnline Network with CAPA
2: # Page Handler
3: #
4: # $Id: lonpage.pm,v 1.111.2.11 2020/03/05 20:46:04 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 HTML::Entities();
47: use GDBM_File;
48: use Apache::lonsequence;
49: use lib '/home/httpd/lib/perl/';
50: use LONCAPA;
51:
52:
53: # -------------------------------------------------------------- Module Globals
54: my %hash;
55: my @rows;
56:
57: # ------------------------------------------------------------------ Euclid gcd
58:
59: sub euclid {
60: my ($e,$f)=@_;
61: my $a; my $b; my $r;
62: if ($e>$f) { $b=$e; $r=$f; } else { $r=$e; $b=$f; }
63: while ($r!=0) {
64: $a=$b; $b=$r;
65: $r=$a%$b;
66: }
67: return $b;
68: }
69:
70: # ------------------------------------------------------------ Build page table
71:
72: sub tracetable {
73: my ($sofar,$rid,$beenhere)=@_;
74: my $further=$sofar;
75: my $randomout=0;
76: unless ($env{'request.role.adv'}) {
77: $randomout = $hash{'randomout_'.$rid};
78: }
79: unless ($beenhere=~/\&$rid\&/) {
80: $beenhere.=$rid.'&';
81: unless ($randomout) {
82: if (defined($hash{'is_map_'.$rid})) {
83: if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&
84: (defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) {
85: my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};
86: $sofar=
87: &tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}},
88: '&'.$frid.$beenhere);
89: $sofar++;
90: if ($hash{'src_'.$frid}) {
91: my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$frid});
92: if (($brepriv eq '2') || ($brepriv eq 'F')) {
93: if (defined($rows[$sofar])) {
94: $rows[$sofar].='&'.$frid;
95: } else {
96: $rows[$sofar]=$frid;
97: }
98: }
99: }
100: }
101: } else {
102: $sofar++;
103: if ($hash{'src_'.$rid}) {
104: my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$rid});
105: if (($brepriv eq '2') || ($brepriv eq 'F')) {
106: if (defined($rows[$sofar])) {
107: $rows[$sofar].='&'.$rid;
108: } else {
109: $rows[$sofar]=$rid;
110: }
111: }
112: }
113: }
114: }
115:
116: if (defined($hash{'to_'.$rid})) {
117: my $mincond=1;
118: my $next='';
119: foreach (split(/\,/,$hash{'to_'.$rid})) {
120: my $thiscond=
121: &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}});
122: if ($thiscond>=$mincond) {
123: if ($next) {
124: $next.=','.$_.':'.$thiscond;
125: } else {
126: $next=$_.':'.$thiscond;
127: }
128: if ($thiscond>$mincond) { $mincond=$thiscond; }
129: }
130: }
131: foreach (split(/\,/,$next)) {
132: my ($linkid,$condval)=split(/\:/,$_);
133: if ($condval>=$mincond) {
134: my $now=&tracetable($sofar,$hash{'goesto_'.$linkid},$beenhere);
135: if ($now>$further) { $further=$now; }
136: }
137: }
138: }
139: }
140: return $further;
141: }
142:
143: # ================================================================ Main Handler
144:
145: sub handler {
146: my $r=shift;
147:
148: # ------------------------------------------- Set document type for header only
149:
150: if ($r->header_only) {
151: if ($env{'browser.mathml'}) {
152: &Apache::loncommon::content_type($r,'text/xml');
153: } else {
154: &Apache::loncommon::content_type($r,'text/html');
155: }
156: $r->send_http_header;
157: return OK;
158: }
159:
160: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
161: ['forceselect','launch']);
162: my $number_of_columns = 1;
163: my $requrl=$r->uri;
164: my $target = $env{'form.grade_target'};
165:
166: # Short term solution: define target as 'tex_answer' when retrieving answers
167: # for resources in a .page when generating printouts.
168: # A better long-term fix would be to modify the way problem rendering, and
169: # answer rendering are retrieved for individual resources when printing a .page,
170: # so rendered problem and answer are sequential for individual resources in
171: # the .page
172: #
173: if ($target eq 'answer') {
174: if ($env{'form.answer_output_mode'} eq 'tex') {
175: $target = 'tex_answer';
176: }
177: }
178: # &Apache::lonnet::logthis("Got a target of $target");
179: if ($target eq 'meta') {
180: &Apache::loncommon::content_type($r,'text/html');
181: $r->send_http_header;
182: return OK;
183: }
184: # ----------------------------------------------------------------- Tie db file
185: if (($env{'request.course.fn'}) && (!$env{'form.forceselect'})) {
186: my $fn=$env{'request.course.fn'};
187: if (-e "$fn.db") {
188: my %buttonshide;
189: my $hostname = $r->hostname();
190: my $lonhost = $r->dir_config('lonHostID');
191: my $ip = &Apache::lonnet::get_host_ip($lonhost);
192: if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) {
193: # ------------------------------------------------------------------- Hash tied
194: my $firstres=$hash{'map_start_'.$requrl};
195: my $lastres=$hash{'map_finish_'.$requrl};
196: if (($firstres) && ($lastres)) {
197: # ------------------------------------------------------------- Countdown Timer
198: my $now = time;
199: my ($pagefirstaccess,%hastimeleft,%countdowndisp);
200: my ($pagesymb,$courseid,$domain,$name)=&Apache::lonnet::whichuser();
201: if ($pagesymb && ($courseid ne '') && ($domain ne '') && ($name ne '')) {
202: my %times=&Apache::lonnet::get('firstaccesstimes',
203: [$courseid."\0".$pagesymb],
204: $domain,$name);
205: if ($times{$courseid."\0".$pagesymb} =~ /^\d+$/) {
206: $pagefirstaccess = $times{$courseid."\0".$pagesymb};
207: }
208: }
209: # ----------------------------------------------------------------- Render page
210:
211: @rows=();
212:
213: &tracetable(0,$firstres,'&');
214:
215: # ------------------------------------------------------------ Add to symb list
216:
217: my $i;
218: my %symbhash=();
219: for ($i=0;$i<=$#rows;$i++) {
220: if ($rows[$i]) {
221: my @colcont=split(/\&/,$rows[$i]);
222: foreach my $rid (@colcont) {
223: my ($mapid,$resid)=split(/\./,$rid);
224: $symbhash{$hash{'src_'.$rid}}=
225: [$hash{'src_'.$rid},$resid];
226: }
227: }
228: }
229: &Apache::lonnet::symblist($requrl,%symbhash);
230:
231: # ------------------------------------------------------------------ Page parms
232:
233: my $j;
234: my $lcm=1;
235: my $contents=0;
236: my $nforms=0;
237: my $nuploads=0;
238: my $ntimers=0;
239: my %turninpaths;
240: my %multiresps;
241: my $turninparent;
242:
243: my %ssibody=();
244: my %ssibgcolor=();
245: my %ssitext=();
246: my %ssilink=();
247: my %ssivlink=();
248: my %ssialink=();
249:
250: my %cellemb=();
251: my %cellexternal=();
252:
253: my $allscript='';
254: my $allmeta='';
255:
256: my $isxml=0;
257: my $xmlheader='';
258: my $xmlbody='';
259:
260: # --------------------------------------------- Get SSI output, post parameters
261:
262: for ($i=0;$i<=$#rows;$i++) {
263: if ($rows[$i]) {
264: $contents++;
265: my @colcont=split(/\&/,$rows[$i]);
266: $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1));
267: foreach (@colcont) {
268: my $src=$hash{'src_'.$_};
269: my $plainsrc = $src;
270: my $anchor;
271: if ($hash{'ext_'.$_} eq 'true:') {
272: $cellexternal{$_}=($hash{'ext_'.$_} eq 'true:');
273: $src =~ s{^/ext/}{http://};
274: $src =~ s{http://https://}{https://};
275: if ($src =~ /(\#[^#]+)$/) {
276: $anchor = $1;
277: $src =~ s/\#[^#]+$//;
278: }
279: }
280: my $unencsrc = $src;
281: my ($extension)=($src=~/\.(\w+)$/);
282: if ($hash{'encrypted_'.$_}) {
283: $src=&Apache::lonenc::encrypted($src);
284: }
285: my ($mapid,$resid)=split(/\./,$_);
286: my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$plainsrc);
287: unless ($env{'request.role.adv'}) {
288: $buttonshide{$symb} = &Apache::lonnet::EXT("resource.0.buttonshide",$symb);
289: }
290: $cellemb{$_}=
291: &Apache::loncommon::fileembstyle($extension);
292: if ($cellexternal{$_}) {
293: if (($target eq 'tex') || ($target eq 'tex_answer')) {
294: my $shown = $src.$anchor;
295: if (($hash{'encrypted_'.$_}) && (!$env{'request.role.adv'})) {
296: $shown = &mt('URL not shown (encrypted)');
297: }
298: my $title=&Apache::lonnet::gettitle($symb);
299: $title = &Apache::lonxml::latex_special_symbols($title);
300: $shown = &Apache::lonxml::latex_special_symbols($shown);
301: $ssibody{$_} = ' \strut \\\\ \textit{'.$title.'} \strut \\\\ '.$shown.'\\\\';
302: } else {
303: my $showsrc = $src;
304: my ($is_pdf,$title,$linktext);
305: if ($unencsrc =~ /\.pdf$/i) {
306: $is_pdf = 1;
307: }
308: if (($hash{'encrypted_'.$_}) && ($symb)) {
309: $title=&Apache::lonnet::gettitle(&Apache::lonenc::encrypted($symb));
310: } else {
311: $title=&Apache::lonnet::gettitle($symb);
312: }
313: if ($env{'browser.mobile'}) {
314: if ($is_pdf) {
315: $linktext = &mt('Link to PDF (for mobile devices)');
316: $ssibody{$_} = &create_extlink($unencsrc,$anchor,$title,$linktext);
317: } else {
318: $linktext = &mt('Link to resource');
319: $ssibody{$_} = &create_extlink($unencsrc,$anchor,$title,$linktext);
320: }
321: } else {
322: my $absolute = $env{'request.use_absolute'};
323: my $uselink = &Apache::loncommon::is_nonframeable($unencsrc,$absolute,$hostname,$ip);
324: if (($uselink) || (($ENV{'SERVER_PORT'} == 443) && ($unencsrc =~ m{^http://}))) {
325: $linktext = &mt('Link to resource');
326: $ssibody{$_} = &create_extlink($unencsrc,$anchor,$title,$linktext);
327: } else {
328: if (($hash{'encrypted_'.$_}) && ($symb) && (!$env{'request.role.adv'})) {
329: $showsrc .= '?symb='.&Apache::lonenc::encrypted($symb);
330: } elsif ($anchor) {
331: $showsrc .= $anchor
332: }
333: $ssibody{$_} = <<ENDEXT;
334: <iframe src="$showsrc" width="100%" height="300px">No iframe support!</iframe>
335: ENDEXT
336: }
337: }
338: }
339: } elsif ($cellemb{$_} eq 'ssi') {
340: # --------------------------------------------------------- This is an SSI cell
341: my $prefix='p_'.$_.'_';
342: my $idprefix='p_'.join('_',($mapid,$resid,''));
343: my %posthash=('request.prefix' => $prefix,
344: 'LONCAPA_INTERNAL_no_discussion' => 'true',
345: 'symb' => $symb);
346: if (($env{'form.grade_target'} eq 'tex') ||
347: ($env{'form.answer_output_mode'} eq 'tex')) {
348: $posthash{'grade_target'}=$env{'form.grade_target'};
349: $posthash{'textwidth'}=$env{'form.textwidth'};
350: $posthash{'problem_split'}=$env{'form.problem_split'};
351: $posthash{'latex_type'}=$env{'form.latex_type'};
352: $posthash{'rndseed'}=$env{'form.rndseed'};
353: $posthash{'answer_output_mode'} = $env{'form.answer_output_mode'};
354: }
355: my $submitted=$env{'form.all_submit_pressed'};
356: if (!$submitted) {
357: foreach my $key (keys(%env)) {
358: if ($key=~/^\Qform.$prefix\Esubmit_(.+)_pressed$/) {
359: if ($env{$key}) {
360: $submitted=1;
361: last;
362: }
363: }
364: }
365: }
366: if ($submitted) {
367: foreach my $key (keys(%env)) {
368: if ($key=~/^\Qform.$prefix\E/) {
369: my $name=$key;
370: $name=~s/^\Qform.$prefix\E//;
371: $posthash{$name}=$env{$key};
372: }
373: }
374: if ($env{'form.all_submit_pressed'}) {
375: $posthash{'all_submit'}='yes';
376: }
377: } elsif ($env{'form.'.$prefix.'markaccess'} eq 'yes') {
378: $posthash{'markaccess'} = $env{'form.'.$prefix.'markaccess'};
379: }
380: if ($env{'environment.remote'} eq 'on') {
381: $posthash{'inhibitmenu'} = 'yes';
382: }
383: my $output=Apache::lonnet::ssi($src,%posthash);
384: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
385: if (($target eq 'tex') || ($target eq 'tex_answer')) {
386: $output =~ s/^([^&]+)\\begin\{document}//;
387: $output =~ s/\\end\{document}//;
388: # $output = '\parbox{\minipagewidth}{ '.$output.' }';
389: #some additional cleanup necessary for LateX (due to limitations of table environment
390: $output =~ s/(\\vskip\s*\d+mm)\s*(\\\\)+/$1/g;
391: }
392: my $matheditor;
393: if ($output =~ /\Qjavascript:LC_mathedit_HWVAL_\E/) {
394: $matheditor = 'dragmath';
395: } elsif ($output =~ /LCmathField/) {
396: $matheditor = 'lcmath';
397: }
398: my $parser=HTML::TokeParser->new(\$output);
399: my $token;
400: my $thisdir=$src;
401: my $bodydef=0;
402: my $thisxml=0;
403: my @rlinks=();
404: if ($output=~/\?xml/) {
405: $isxml=1;
406: $thisxml=1;
407: $output=~
408: /((?:\<(?:\?xml|\!DOC|html)[^\>]*(?:\>|\>\]\>)\s*)+)\<body[^\>]*\>/si;
409: $xmlheader=$1;
410: }
411: while ($token=$parser->get_token) {
412: if ($token->[0] eq 'S') {
413: if ($token->[1] eq 'a') {
414: if ($token->[2]->{'href'}) {
415: $rlinks[$#rlinks+1]=
416: $token->[2]->{'href'};
417: }
418: } elsif ($token->[1] eq 'img') {
419: $rlinks[$#rlinks+1]=
420: $token->[2]->{'src'};
421: } elsif ($token->[1] eq 'embed') {
422: $rlinks[$#rlinks+1]=
423: $token->[2]->{'src'};
424: } elsif ($token->[1] eq 'base') {
425: $thisdir=$token->[2]->{'href'};
426: } elsif ($token->[1] eq 'body') {
427: $bodydef=1;
428: $ssibgcolor{$_}=$token->[2]->{'bgcolor'};
429: $ssitext{$_}=$token->[2]->{'text'};
430: $ssilink{$_}=$token->[2]->{'link'};
431: $ssivlink{$_}=$token->[2]->{'vlink'};
432: $ssialink{$_}=$token->[2]->{'alink'};
433: if ($thisxml) {
434: $xmlbody=$token->[4];
435: }
436: } elsif ($token->[1] eq 'meta') {
437: if ($token->[4] !~ m:/>$:) {
438: $allmeta.="\n".$token->[4].'</meta>';
439: } else {
440: $allmeta.="\n".$token->[4];
441: }
442: } elsif (($token->[1] eq 'script') &&
443: ($bodydef==0)) {
444: $allscript.="\n\n"
445: .$parser->get_text('/script');
446: }
447: }
448: }
449: if ($output=~/\<body[^\>]*\>(.*)/si) {
450: $output=$1;
451: }
452: $output=~s/\<\/body\>.*//si;
453: if ($output=~/\<form/si) {
454: my $hastimer;
455: $nforms++;
456: $output=~s/\<form[^\>]*\>//gsi;
457: $output=~s/\<\/form[^\>]*\>//gsi;
458: if ($output=~/\<input[^\>]+name\s*=\s*[\'\"]*HWFILE/) {
459: $nuploads++;
460: }
461: if ($output=~/\<input[^\>]+name\s*=\s*[\'\"]*accessbutton/) {
462: $ntimers++;
463: $hastimer = 1;
464: }
465: $output=~
466: s/\<((?:input|select|button|textarea)[^\>]+)name\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 name="$prefix$2" $3\>/gsi;
467: $output=~
468: s/\<((?:input|select|button|textarea)[^\>]+)id\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 id="$idprefix$2" $3\>/gsi;
469: $output=~
470: s/(\Qthis.form.elements['\E)(HW(?:VAL|CHK)_[^']+\'\]\.(?:value=\'|checked))/$1$prefix$2/gsi;
471: if ($hastimer) {
472: $output=~
473: s/\<(input[^\>]+name=\Q"$prefix\Eaccessbutton"[^\>]+)(?:\Qdocument.markaccess.submit();\E)([^\>]*)\>/\<$1pageTimer(this.form,'$prefix')$2\>/gsi;
474: $output=~ s/\<(input[^\>]+name=\Q"$prefix\Emarkaccess"[^\>]+value=["'])(?:yes)(['"][^\>]*)\>/\<$1$2\>/gsi;
475: }
476: if ($matheditor eq 'dragmath') {
477: $output=~
478: s/(\Qjavascript:LC_mathedit_\E)(HWVAL_)([^'"]+?)(\(['"]*)(\QHWVAL_\E\3['"]\)\;void\(0\)\;)/$1$idprefix$2$3$4$idprefix$5/g;
479: $output=~
480: s/(function\s+LC_mathedit_)(HWVAL_)([^'"]+?)(\s+\(LCtextline\))/$1$idprefix$2$3$4/g;
481: } elsif ($matheditor eq 'lcmath') {
482: $output=~
483: s/(var\s+LCmathField\s+=\s+document\.getElementById\(['"])([^'"]+?)(['"]\)\;)/$1$idprefix$2$3/g;
484: }
485: $output=~
486: s/(\Q<div id="msg_\E)(\Qsubmit_\E)([^"]*)(\Q" style="display:none">\E)/<input type="hidden" name="$prefix$2$3_pressed" id="$idprefix$2$3_pressed" value="" \/>$1$idprefix$2$3$4/g;
487: $output=~
488: s/(\Q<td class="LC_status_\E)(\Qsubmit_\E)([^\"]*)(\s*[^\"]*"\>)/$1$idprefix$2$3$4/g;
489: if ($nuploads) {
490: ($turninpaths{$prefix},$multiresps{$prefix}) =
491: &Apache::loncommon::get_turnedin_filepath($symb,$env{'user.name'},$env{'user.domain'});
492: if ($turninparent eq '') {
493: $turninparent = $turninpaths{$prefix};
494: $turninparent =~ s{(/[^/]+)$}{};
495: }
496: }
497: $output=~
498: s/\<((?:input|select)[^\>]+\Qjavascript:setSubmittedPart\E)\(\s*[\'\"]([^\'\"]+)[\'\"]*\s*\)/\<$1('$2','$prefix')/gsi;
499: $output=~
500: s/\<(input[^\>]+\Qonfocus=\"javascript:disableAutoComplete\E)\(\'([^\']+)\'\)(;\")/\<$1('$idprefix$2')$3/gsi;
501: unless ($hastimer) {
502: if ($plainsrc =~ /$LONCAPA::assess_re/) {
503: %Apache::lonhomework::history =
504: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
505: my $type = 'problem';
506: if ($extension eq 'task') {
507: $type = 'Task';
508: }
509: my ($status,$accessmsg,$slot_name,$slot) =
510: &Apache::lonhomework::check_slot_access('0',$type,$symb);
511: undef(%Apache::lonhomework::history);
512: my $probstatus = &Apache::lonnet::EXT("resource.0.problemstatus",$symb);
513: if (($status eq 'CAN_ANSWER') || (($status eq 'CANNOT_ANSWER') &&
514: (($probstatus eq 'no') || ($probstatus eq 'no_feedback_ever')))) {
515: my ($slothastime,$timerhastime);
516: if ($slot_name ne '') {
517: if (ref($slot) eq 'HASH') {
518: if (($slot->{'starttime'} < $now) &&
519: ($slot->{'endtime'} > $now)) {
520: $slothastime = $now - $slot->{'endtime'};
521: }
522: }
523: }
524: my $duedate = &Apache::lonnet::EXT("resource.0.duedate",$symb);
525: my @interval=&Apache::lonnet::EXT("resource.0.interval",$symb);
526: if (@interval > 1) {
527: my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
528: if ($first_access > 0) {
529: my $timeremains = $first_access+$interval[0] - $now;
530: if ($timeremains > 0) {
531: $timerhastime = $timeremains;
532: }
533: }
534: }
535: if (($duedate && $duedate > $now) ||
536: (!$duedate && $timerhastime > 0) ||
537: ($slot_name ne '' && $slothastime)) {
538: if ((@interval > 1 && $timerhastime) ||
539: ($type eq 'Task' && $slothastime)) {
540: $countdowndisp{$symb} = 'inline';
541: if ((@interval > 1) && ($timerhastime)) {
542: $hastimeleft{$symb} = $timerhastime;
543: } else {
544: $hastimeleft{$symb} = $slothastime;
545: }
546: } else {
547: $hastimeleft{$symb} = $duedate - $now;
548: $countdowndisp{$symb} = 'none';
549: }
550: }
551: }
552: }
553: }
554: }
555: $thisdir=~s/\/[^\/]*$//;
556: foreach (@rlinks) {
557: unless (($_=~/^https?\:\/\//i) ||
558: ($_=~/^\//) ||
559: ($_=~/^javascript:/i) ||
560: ($_=~/^mailto:/i) ||
561: ($_=~/^\#/)) {
562: my $newlocation=
563: &Apache::lonnet::hreflocation($thisdir,$_);
564: $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
565: }
566: }
567: # -------------------------------------------------- Deal with Applet codebases
568: $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
569: $ssibody{$_}=$output;
570: # ---------------------------------------------------------------- End SSI cell
571: }
572: }
573: }
574: }
575: unless ($contents) {
576: &Apache::loncommon::content_type($r,'text/html');
577: $r->send_http_header;
578: $r->print(&Apache::loncommon::start_page(undef,undef,
579: {'force_register' => 1}));
580: $r->print(&mt('This page is either empty or it only contains resources that are currently hidden').'. ');
581: $r->print('<br /><br />'.&mt('Please use the LON-CAPA navigation arrows to move to another item in the course').
582: &Apache::loncommon::end_page());
583: } else {
584: # ------------------------------------------------------------------ Build page
585:
586: # ---------------------------------------------------------------- Send headers
587: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
588: if ($isxml) {
589: &Apache::loncommon::content_type($r,'text/xml');
590: } else {
591: &Apache::loncommon::content_type($r,'text/html');
592: }
593: $r->send_http_header;
594: # ------------------------------------------------------------------------ Head
595: if ($allscript) {
596: $allscript =
597: "\n".'<script type="text/javascript">'."\n".
598: $allscript.
599: "\n</script>\n";
600: }
601: if (($nforms) && ($nuploads)) {
602: $allscript .= &Apache::lonhtmlcommon::file_submissionchk_js(\%turninpaths,\%multiresps).
603: '<script type="text/javascript" '.
604: 'src="/res/adm/includes/file_upload.js"></script>';
605: }
606: if (($nforms) && (&Apache::lonhtmlcommon::htmlareabrowser())) {
607: my %textarea_args = (
608: dragmath => 'math',
609: );
610: $allscript .= &Apache::lonhtmlcommon::htmlareaselectactive(\%textarea_args);
611: }
612: if ($ntimers) {
613: $allscript .= '<script type="text/javascript">'."\n".
614: '// <![CDATA['."\n".
615: 'function pageTimer(form,prefix) {'."\n".
616: " form.elements[prefix+'markaccess'].value = 'yes';\n".
617: " form.submit();\n".
618: '}'."\n".
619: '// ]]>'.
620: "\n</script>\n";
621: }
622: &Apache::lonhtmlcommon::clear_breadcrumb_tools();
623: if (keys(%hastimeleft)) {
624: my (%uniquetimes,%uniquedisplays);
625: foreach my $item (values(%hastimeleft)) {
626: if (exists($uniquetimes{$item})) {
627: $uniquetimes{$item} ++;
628: } else {
629: $uniquetimes{$item} = 1;
630: }
631: }
632: if (keys(%uniquetimes) == 1) {
633: my (%uniquedisplays,%uniquedones,$currdisp);
634: if (keys(%countdowndisp)) {
635: foreach my $item (values(%countdowndisp)) {
636: if (exists($uniquedisplays{$item})) {
637: $uniquedisplays{$item} ++;
638: } else {
639: $uniquedisplays{$item} = 1;
640: }
641: }
642: my @countdowndisplay = keys(%uniquedisplays);
643: if (scalar(@countdowndisplay) == 1) {
644: $currdisp = $countdowndisplay[0];
645: }
646: }
647: &add_countdown_timer($currdisp);
648: }
649: }
650: my $pagebuttonshide;
651: if (keys(%buttonshide)) {
652: my %uniquebuttonhide;
653: foreach my $item (values(%buttonshide)) {
654: if (exists($uniquebuttonhide{$item})) {
655: $uniquebuttonhide{$item} ++;
656: } else {
657: $uniquebuttonhide{$item} = 1;
658: }
659: }
660: if (keys(%uniquebuttonhide) == 1) {
661: if (lc((keys(%uniquebuttonhide))[0]) eq 'yes') {
662: $pagebuttonshide = 'yes';
663: }
664: }
665: }
666: # ------------------------------------------------------------------ Start body
667: $r->print(&Apache::loncommon::start_page(undef,$allscript,
668: {'force_register' => 1,
669: 'bgcolor' => '#ffffff',
670: 'hide_buttons' => $pagebuttonshide}));
671: # ------------------------------------------------------------------ Start form
672: if ($nforms) {
673: my $fmtag = '<form name="lonhomework" method="post" enctype="multipart/form-data"';
674: if ($nuploads) {
675: my $multi;
676: if ($nuploads > 1) {
677: $multi = 1;
678: }
679: $fmtag .= 'onsubmit="return file_submission_check(this,'."'$turninparent','$multi'".');"';
680: }
681: $fmtag .= ' action="'.
682: &Apache::lonenc::check_encrypt($requrl)
683: .'" id="LC_page">';
684: $r->print($fmtag);
685: }
686: } elsif (($target eq 'tex') || ($target eq 'tex_answer')) {
687: # I think this is not needed as the header
688: # will be put in for each of the page parts
689: # by the londefdef.pm now that we are opening up
690: # the parts of a page.
691: #$r->print('\documentclass{article}
692: # \newcommand{\keephidden}[1]{}
693: # \usepackage[dvips]{graphicx}
694: # \usepackage{epsfig}
695: # \usepackage{calc}
696: # \usepackage{longtable}
697: # \begin{document}');
698: }
699: # ----------------------------------------------------------------- Start table
700: if (($target eq 'tex') || ($target eq 'tex_answer')) {
701: # # $r->print('\begin{longtable}INSERTTHEHEADOFLONGTABLE\endfirsthead\endhead ');
702: if ($number_of_columns le $lcm) {$number_of_columns=$lcm;};
703: } else {
704: $r->print('<table width="100%" cols="'.$lcm.'" border="0">');
705: }
706: # generate rows
707: for ($i=0;$i<=$#rows;$i++) {
708: if ($rows[$i]) {
709: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
710: $r->print("\n<tr>");
711: }
712: my @colcont=split(/\&/,$rows[$i]);
713: my $avespan=$lcm/($#colcont+1);
714: for ($j=0;$j<=$#colcont;$j++) {
715: my $rid=$colcont[$j];
716: my $metainfo =&get_buttons(\%hash,$rid,\%buttonshide,$hostname).'<br />';
717: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
718: $r->print('<td colspan="'.$avespan.'"');
719: }
720: if (($cellemb{$rid} eq 'ssi') || ($cellexternal{$rid})) {
721: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
722: if ($ssibgcolor{$rid}) {
723: $r->print(' bgcolor="'.
724: $ssibgcolor{$rid}.'"');
725: }
726: $r->print('>'.$metainfo.'<font');
727:
728: if ($ssitext{$rid}) {
729: $r->print(' text="'.$ssitext{$rid}.'"');
730: }
731: if ($ssilink{$rid}) {
732: $r->print(' link="'.$ssilink{$rid}.'"');
733: }
734: if ($ssitext{$rid}) {
735: $r->print(' vlink="'.$ssivlink{$rid}.'"');
736: }
737: if ($ssialink{$rid}) {
738: $r->print(' alink="'.$ssialink{$rid}.'"');
739: }
740: $r->print('>');
741: }
742: $r->print($ssibody{$rid});
743: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
744: $r->print('</font>');
745: }
746: if ($env{'course.'.
747: $env{'request.course.id'}.
748: '.pageseparators'} eq 'yes') {
749: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
750: $r->print('<hr />');
751: }
752: }
753: } elsif ($cellemb{$rid} eq 'img') {
754: $r->print('>'.$metainfo.'<img src="'.
755: $hash{'src_'.$rid}.'" />');
756: } elsif ($cellemb{$rid} eq 'emb') {
757: $r->print('>'.$metainfo.'<embed src="'.
758: $hash{'src_'.$rid}.'"></embed>');
759: } elsif (&Apache::lonnet::declutter($hash{'src_'.$rid}) !~/\.(sequence|page)$/) {
760: $r->print($metainfo.'<b>'.$hash{'title_'.$rid}.'</b><br />');
761: unless ($cellemb{$rid} eq 'wrp') {
762: $r->print(&mt('It is recommended that you use an up-to-date virus scanner before handling this file.'));
763: }
764: $r->print('</p><p><table>'.
765: &Apache::londocs::entryline(0,
766: &mt("Click to download or use your browser's Save Link function"),
767: '/'.&Apache::lonnet::declutter($hash{'src_'.$rid})).
768: '</table></p><br />');
769: }
770: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
771: $r->print('</td>');
772: } else {
773: # for (my $incol=1;$incol<=$avespan;$incol++) {
774: # $r->print(' & ');
775: # }
776: }
777: }
778: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
779: $r->print('</tr>');
780: } else {
781: # $r->print('REMOVETHEHEADOFLONGTABLE\\\\');
782: }
783: }
784: }
785: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
786: $r->print("\n</table>");
787: } else {
788: # $r->print('\end{longtable}\strut');
789: }
790: # ---------------------------------------------------------------- Submit, etc.
791: if ($nforms) {
792: my $class;
793: if ($nforms > 1) {
794: $class = ' class="LC_hwk_submit"';
795: if ($ntimers) {
796: $nforms = 1;
797: $class = '';
798: }
799: }
800: $r->print(
801: '<input name="all_submit" value="'.&mt('Submit All').'" type="'.
802: (($nforms>1)?'submit':'hidden').'"'.$class.' id="all_submit" />'.
803: '<input type="hidden" name="all_submit_pressed" '.
804: 'id="all_submit_pressed" value="" />'.
805: '<div id="msg_all_submit" style="display:none">'.
806: &mt('Processing your submission ...').'</div></form>');
807: }
808: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
809: $r->print(&Apache::loncommon::end_page({'discussion'
810: => 1,}));
811: } else {
812: $r->print('\end{document}'.$number_of_columns);
813: }
814: &Apache::lonnet::symblist($requrl,%symbhash);
815: my ($map,$id,$url)=&Apache::lonnet::decode_symb(&Apache::lonnet::symbread());
816: &Apache::lonnet::symblist($map,'last_known'=>[$url,$id]);
817: # -------------------------------------------------------------------- End page
818: }
819: # ------------------------------------------------------------- End render page
820: } else {
821: &Apache::loncommon::content_type($r,'text/html');
822: $r->send_http_header;
823: &Apache::lonsequence::viewmap($r,$requrl);
824: }
825: # ------------------------------------------------------------------ Untie hash
826: unless (untie(%hash)) {
827: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
828: "Could not untie coursemap $fn (browse).</font>");
829: }
830: # -------------------------------------------------------------------- All done
831: return OK;
832: # ----------------------------------------------- Errors, hash could no be tied
833: }
834: }
835: }
836: &Apache::loncommon::content_type($r,'text/html');
837: $r->send_http_header;
838: &Apache::lonsequence::viewmap($r,$requrl);
839: return OK;
840: }
841:
842: sub get_buttons {
843: my ($hash,$rid,$buttonshide,$hostname) = @_;
844:
845: my ($mapid,$resid)=split(/\./,$rid);
846: my $symb=&Apache::lonnet::encode_symb($hash->{'map_id_'.$mapid},
847: $resid,
848: $hash->{'src_'.$rid});
849: my $aname;
850: if (($hash->{'encrypted_'.$rid}) && (!$env{'request.role.adv'})) {
851: $aname = 'LC_'.$rid;
852: } else {
853: $aname = &escape($symb);
854: }
855: my $metainfo = '<a name="'.$aname.'"></a>';
856: unless ($env{'request.role.adv'}) {
857: if ($buttonshide->{$symb} eq 'yes') {
858: return $metainfo;
859: }
860: }
861: my $crs_sec = $env{'request.course.id'} . (($env{'request.course.sec'} ne '')
862: ? "/$env{'request.course.sec'}"
863: : '');
864: my $esrc=&Apache::lonnet::declutter($hash->{'src_'.$rid});
865: if ($hash->{'encrypted_'.$rid}) {
866: $esrc=&Apache::lonenc::encrypted($esrc);
867: }
868: if ($hash->{'src_'.$rid} !~ m-^/uploaded/-
869: && $hash->{'src_'.$rid} !~ m{^/ext/}
870: && !$env{'request.enc'}
871: && ($env{'request.role.adv'}
872: || !$hash->{'encrypted_'.$rid})) {
873: $metainfo .= '<a href="'.$hash->{'src_'.$rid}.'.meta'.'" '.
874: 'target="LONcatInfo">'.
875: '<img src="/res/adm/pages/catalog.png" class="LC_icon"'.
876: ' alt="'.&mt('Show Metadata').'"'.
877: ' title="'.&mt('Show Metadata').'" />'.
878: '</a>';
879: }
880: if (($hash->{'src_'.$rid} !~ m{^/uploaded/}) &&
881: ($hash->{'src_'.$rid} !~ m{^/ext/})) {
882: $metainfo .= '<a href="/adm/evaluate?postdata='.
883: &escape($esrc).
884: '" target="LONcatInfo">'.
885: '<img src="/res/adm/pages/eval.png" class="LC_icon"'.
886: ' alt="'.&mt('Provide my evaluation of this resource').'"'.
887: ' title="'.&mt('Provide my evaluation of this resource').'" />'.
888: '</a>';
889: }
890: if (($hash->{'src_'.$rid}=~/$LONCAPA::assess_re/) &&
891: ($hash->{'src_'.$rid} !~ m-^/uploaded/-)) {
892:
893: if ((&Apache::lonnet::allowed('mgr',$crs_sec)) ||
894: (&Apache::lonnet::allowed('vgr',$crs_sec))) {
895: $metainfo.=
896: '<a href="/adm/grades?symb='.&escape($symb).
897: # '&command=submission" target="LONcatInfo">'.
898: '&command=submission">'.
899: '<img src="/adm/lonMisc/subm_button.png" class="LC_icon"'.
900: ' alt="'.&mt('View Submissions for a Student or a Group of Students').'"'.
901: ' title="'.&mt('View Submissions for a Student or a Group of Students').'" />'.
902: '</a>';
903: }
904: if (&Apache::lonnet::allowed('mgr',$crs_sec)) {
905: $metainfo.=
906: '<a href="/adm/grades?symb='.&escape($symb).
907: # '&command=gradingmenu" target="LONcatInfo">'.
908: '&command=gradingmenu">'.
909: '<img src="/res/adm/pages/pgrd.png" class="LC_icon"'.
910: ' alt="'.&mt('Content Grades').'"'.
911: ' title="'.&mt('Content Grades').'" />'.
912: '</a>';
913: }
914: if ((&Apache::lonnet::allowed('opa',$crs_sec)) ||
915: (&Apache::lonnet::allowed('vpa',$crs_sec))) {
916: $metainfo.=
917: '<a href="/adm/parmset?symb='.&escape($symb).
918: # '" target="LONcatInfo">'.
919: '" >'.
920: '<img src="/adm/lonMisc/pprm_button.png" class="LC_icon"'.
921: ' alt="'.&mt('Content Settings').'"'.
922: ' title="'.&mt('Content Settings').'" />'.
923: '</a>';
924: }
925: }
926: if ($env{'request.course.id'}) {
927: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
928: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
929: my $file=&Apache::lonnet::declutter($hash->{'src_'.$rid});
930: my $editbutton = '';
931: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
932: my ($cfile,$home,$switchserver,$forceedit,$forceview) =
933: &Apache::lonnet::can_edit_resource($file,$cnum,$cdom,$hash->{'src_'.$rid},$symb);
934: if ($cfile ne '') {
935: my $jscall = &Apache::lonhtmlcommon::jump_to_editres($cfile,$home,$switchserver,
936: $forceedit,1,$symb,undef,
937: &escape($env{'form.title'}),
938: $hostname);
939: if ($jscall) {
940: $editbutton = 1;
941: my $icon = 'pcstr.png';
942: my $label = &mt('Edit');
943: my $title = &mt('Edit this resource');
944: my $pic = '<img src="'.&Apache::loncommon::lonhttpdurl('/res/adm/pages/'.$icon).'"'.
945: ' class="LC_icon" alt="'.$label.'" title="'.$title.'" />';
946: $metainfo .= ' <a href="javascript:'.$jscall.';">'.$pic.'</a>';
947: }
948: }
949: }
950: if ((!$editbutton) && ($file=~/$LONCAPA::assess_re/)) {
951: my $url = &Apache::lonnet::clutter($file);
952: my $viewsrcbutton;
953: if ((&Apache::lonnet::allowed('cre','/')) &&
954: (&Apache::lonnet::metadata($url,'sourceavail') eq 'open')) {
955: $viewsrcbutton = 1;
956: } elsif (&Apache::lonnet::allowed('vxc',$crs_sec)) {
957: if ($url =~ m{^\Q/res/$cdom/\E($LONCAPA::match_username)/}) {
958: my $auname = $1;
959: if (($env{'request.course.adhocsrcaccess'} ne '') &&
960: (grep(/^\Q$auname\E$/,split(/,/,$env{'request.course.adhocsrcaccess'})))) {
961: $viewsrcbutton = 1;
962: } elsif ((&Apache::lonnet::metadata($url,'sourceavail') eq 'open') &&
963: (&Apache::lonnet::allowed('bre',$crs_sec))) {
964: $viewsrcbutton = 1;
965: }
966: }
967: }
968: if ($viewsrcbutton) {
969: my $icon = 'pcstr.png';
970: my $label = &mt('View Source');
971: my $title = &mt('View source code');
972: my $jsrid = $rid;
973: $jsrid =~ s/\./_/g;
974: my $showurl = &escape(&Apache::lonenc::check_encrypt($url));
975: my $pic = '<img src="'.&Apache::loncommon::lonhttpdurl('/res/adm/pages/'.$icon).'"'.
976: ' class="LC_icon" alt="'.$label.'" title="'.$title.'" />';
977: $metainfo .= ' <a href="javascript:open_source_'.$jsrid.'();">'.$pic.'</a>'."\n".
978: '<script type="text/javascript">'."\n".
979: "function open_source_$jsrid() {\n".
980: " sourcewin=window.open('/adm/source?inhibitmenu=yes&viewonly=1&filename=$showurl','LONsource',".
981: "'height=500,width=600,resizable=yes,location=no,menubar=no,toolbar=no,scrollbars=yes');\n".
982: "}\n".
983: "</script>\n";
984: }
985: }
986: }
987: return $metainfo;
988: }
989:
990: sub add_countdown_timer {
991: my ($currdisp) = @_;
992: my ($collapse,$expand,$alttxt,$title);
993: if ($currdisp eq 'inline') {
994: $collapse = '► ';
995: } else {
996: $expand = '◄ ';
997: }
998: unless ($env{'environment.icons'} eq 'iconsonly') {
999: $alttxt = &mt('Timer');
1000: $title = $alttxt.' ';
1001: }
1002: my $desc = &mt('Countdown to due date/time');
1003: my $output = <<END;
1004: <a href="javascript:toggleCountdown();" class="LC_menubuttons_link">
1005: <span id="ddcountcollapse" class="LC_menubuttons_inline_text">
1006: $collapse
1007: </span></a>
1008: <span id="duedatecountdown" class="LC_menubuttons_inline_text" style="display: $currdisp;"></span>
1009: <a href="javascript:toggleCountdown();" class="LC_menubuttons_link">
1010: <span id="ddcountexpand" class="LC_menubuttons_inline_text" >$expand</span>
1011: <img src="/res/adm/pages/timer.png" title="$desc" class="LC_icon" alt="$alttxt" /><span class="LC_menubuttons_inline_text">$title</span></a>
1012: END
1013: &Apache::lonhtmlcommon::add_breadcrumb_tool('tools',$output);
1014: return;
1015: }
1016:
1017: sub create_extlink {
1018: my ($url,$anchor,$title,$linktext) = @_;
1019: my $shownlink;
1020: unless ($title eq '') {
1021: $shownlink = '<span style="font-weight:bold;">'.$title.'</span><br />';
1022: }
1023: my $dest = &HTML::Entities::encode($url.$anchor,'&<>"');
1024: $shownlink .= '<a href="'.$dest.'">'.$linktext.'</a>';
1025: return $shownlink;
1026: }
1027:
1028: 1;
1029: __END__
1030:
1031:
1032: =head1 NAME
1033:
1034: Apache::lonpage - Page Handler
1035:
1036: =head1 SYNOPSIS
1037:
1038: Invoked by /etc/httpd/conf/srm.conf:
1039:
1040: <LocationMatch "^/res/.*\.page$>
1041: SetHandler perl-script
1042: PerlHandler Apache::lonpage
1043: </LocationMatch>
1044:
1045: =head1 INTRODUCTION
1046:
1047: This module renders a .page resource.
1048:
1049: This is part of the LearningOnline Network with CAPA project
1050: described at http://www.lon-capa.org.
1051:
1052: =head1 HANDLER SUBROUTINE
1053:
1054: This routine is called by Apache and mod_perl.
1055:
1056: =over 4
1057:
1058: =item *
1059:
1060: set document type for header only
1061:
1062: =item *
1063:
1064: tie db file
1065:
1066: =item *
1067:
1068: render page
1069:
1070: =item *
1071:
1072: add to symb list
1073:
1074: =item *
1075:
1076: page parms
1077:
1078: =item *
1079:
1080: Get SSI output, post parameters
1081:
1082: =item *
1083:
1084: SSI cell rendering
1085:
1086: =item *
1087:
1088: Deal with Applet codebases
1089:
1090: =item *
1091:
1092: Build page
1093:
1094: =item *
1095:
1096: send headers
1097:
1098: =item *
1099:
1100: start body
1101:
1102: =item *
1103:
1104: start form
1105:
1106: =item *
1107:
1108: start table
1109:
1110: =item *
1111:
1112: submit element, etc, render page, untie hash
1113:
1114: =back
1115:
1116: =head1 OTHER SUBROUTINES
1117:
1118: =over 4
1119:
1120: =item *
1121:
1122: euclid() : Euclid's method for determining the greatest common denominator.
1123:
1124: =item *
1125:
1126: tracetable() : Build page table.
1127:
1128: =back
1129:
1130: =cut
1131:
1132:
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