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[LON-CAPA] /
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lonpage.pm
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Mon Feb 17 16:12:35 2020 UTC (4 years, 2 months ago) by
raeburn
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- "View source" icon/link for published assessment items in a .page in a
course, where user does not have editing privileges, but does have vxc
priv in course, and system-level bre priv, and item published source open.
1: # The LearningOnline Network with CAPA
2: # Page Handler
3: #
4: # $Id: lonpage.pm,v 1.130 2020/02/17 16:12:35 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::lonparmset;
45: use Apache::lonenc();
46: use HTML::TokeParser;
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 = $r->hostname();
190: if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) {
191: # ------------------------------------------------------------------- Hash tied
192: my $firstres=$hash{'map_start_'.$requrl};
193: my $lastres=$hash{'map_finish_'.$requrl};
194: if (($firstres) && ($lastres)) {
195: # ------------------------------------------------------------- Countdown Timer
196: my $now = time;
197: my ($pagefirstaccess,%hastimeleft,%countdowndisp,%donebutton,
198: %donebtnextra,%buttonbytime,$donetime,$symbtosetdone);
199: my ($pagesymb,$courseid,$domain,$name)=&Apache::lonnet::whichuser();
200: unless ($pagesymb) {
201: $pagesymb=&Apache::lonnet::symbread($requrl);
202: }
203: if ($pagesymb && ($courseid ne '') && ($domain ne '') && ($name ne '')) {
204: my %times=&Apache::lonnet::get('firstaccesstimes',
205: [$courseid."\0".$pagesymb],
206: $domain,$name);
207: if ($times{$courseid."\0".$pagesymb} =~ /^\d+$/) {
208: $pagefirstaccess = $times{$courseid."\0".$pagesymb};
209: if ($pagefirstaccess && $env{'form.LC_interval_done'} eq 'true') {
210: $donetime = $now - $pagefirstaccess;
211: }
212: }
213: }
214:
215: # ----------------------------------------------------------------- Render page
216:
217: @rows=();
218:
219: &tracetable(0,$firstres,'&');
220:
221: # ------------------------------------------------------------ Add to symb list
222:
223: my $i;
224: my %symbhash=();
225: for ($i=0;$i<=$#rows;$i++) {
226: if ($rows[$i]) {
227: my @colcont=split(/\&/,$rows[$i]);
228: foreach my $rid (@colcont) {
229: my ($mapid,$resid)=split(/\./,$rid);
230: $symbhash{$hash{'src_'.$rid}}=
231: [$hash{'src_'.$rid},$resid];
232: if (($donetime) && ($symbtosetdone eq '')) {
233: my $src = $hash{'src_'.$rid};
234: if ($hash{'encrypted_'.$rid}) {
235: $src=&Apache::lonenc::encrypted($src);
236: }
237: my ($mapid,$resid)=split(/\./,$rid);
238: my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$src);
239: if ($src =~ /$LONCAPA::assess_re/) {
240: my @interval=&Apache::lonnet::EXT("resource.0.interval",$symb);
241: if (@interval > 1) {
242: if (($interval[1] eq 'map') && ($pagefirstaccess)) {
243: my ($timelimit) = ($interval[0] =~ /^(\d+)/);
244: if ($timelimit) {
245: if ($pagefirstaccess + $timelimit > $now) {
246: $symbtosetdone = $symb;
247: }
248: }
249: }
250: }
251: }
252: }
253: }
254: }
255: }
256: &Apache::lonnet::symblist($requrl,%symbhash);
257:
258: # ------------------------------------------------------------------ Page parms
259:
260: my $j;
261: my $lcm=1;
262: my $contents=0;
263: my $nforms=0;
264: my $nuploads=0;
265: my $ntimers=0;
266: my %turninpaths;
267: my %multiresps;
268: my $turninparent;
269:
270: my %ssibody=();
271: my %ssibgcolor=();
272: my %ssitext=();
273: my %ssilink=();
274: my %ssivlink=();
275: my %ssialink=();
276:
277: my %cellemb=();
278: my %cellexternal=();
279:
280: my $allscript='';
281: my $allmeta='';
282:
283: my $isxml=0;
284: my $xmlheader='';
285: my $xmlbody='';
286:
287: # ---------------------------------------------------------- Handle Done button
288:
289: # Set the event timer to zero if the "done button" was clicked.
290: if ($donetime && $symbtosetdone) {
291: &Apache::lonparmset::storeparm_by_symb_inner($symbtosetdone,'0_interval',
292: 2,$donetime,'date_interval',
293: $name,$domain);
294: undef($env{'form.LC_interval_done'});
295: }
296:
297: # --------------------------------------------- Get SSI output, post parameters
298:
299: for ($i=0;$i<=$#rows;$i++) {
300: if ($rows[$i]) {
301: $contents++;
302: my @colcont=split(/\&/,$rows[$i]);
303: $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1));
304: foreach (@colcont) {
305: my $src=$hash{'src_'.$_};
306: my $plainsrc = $src;
307: my ($extension)=($src=~/\.(\w+)$/);
308: $cellexternal{$_}=($hash{'ext_'.$_} eq 'true:');
309: if ($hash{'encrypted_'.$_}) {
310: $src=&Apache::lonenc::encrypted($src);
311: }
312: my ($mapid,$resid)=split(/\./,$_);
313: my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$src);
314: unless ($env{'request.role.adv'}) {
315: $buttonshide{$symb} = &Apache::lonnet::EXT("resource.0.buttonshide",$symb);
316: }
317: $cellemb{$_}=
318: &Apache::loncommon::fileembstyle($extension);
319: if ($cellexternal{$_}) {
320: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
321: $ssibody{$_} = <<ENDEXT;
322: <iframe src="$src" width="100%">No iframe support!</iframe>
323: ENDEXT
324: }
325: } elsif ($cellemb{$_} eq 'ssi') {
326: # --------------------------------------------------------- This is an SSI cell
327: my $prefix='p_'.$_.'_';
328: my $idprefix= 'p_'.join('_',($mapid,$resid,''));
329: my %posthash=('request.prefix' => $prefix,
330: 'LONCAPA_INTERNAL_no_discussion' => 'true',
331: 'symb' => $symb);
332: if (($env{'form.grade_target'} eq 'tex') ||
333: ($env{'form.answer_output_mode'} eq 'tex')) {
334: $posthash{'grade_target'}=$env{'form.grade_target'};
335: $posthash{'textwidth'}=$env{'form.textwidth'};
336: $posthash{'problem_split'}=$env{'form.problem_split'};
337: $posthash{'latex_type'}=$env{'form.latex_type'};
338: $posthash{'rndseed'}=$env{'form.rndseed'};
339: $posthash{'answer_output_mode'} = $env{'form.answer_output_mode'};
340: }
341: my $submitted=$env{'form.all_submit_pressed'};
342: if (!$submitted) {
343: foreach my $key (keys(%env)) {
344: if ($key=~/^\Qform.$prefix\Esubmit_(.+)_pressed$/) {
345: if ($env{$key}) {
346: $submitted=1;
347: last;
348: }
349: }
350: }
351: }
352: if ($submitted) {
353: foreach my $key (keys(%env)) {
354: if ($key=~/^\Qform.$prefix\E/) {
355: my $name=$key;
356: $name=~s/^\Qform.$prefix\E//;
357: $posthash{$name}=$env{$key};
358: }
359: }
360: if ($env{'form.all_submit_pressed'}) {
361: $posthash{'all_submit'}='yes';
362: }
363: } elsif ($env{'form.'.$prefix.'markaccess'} eq 'yes') {
364: $posthash{'markaccess'} = $env{'form.'.$prefix.'markaccess'};
365: }
366: my $output=Apache::lonnet::ssi($src,%posthash);
367: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
368: if (($target eq 'tex') || ($target eq 'tex_answer')) {
369: $output =~ s/^([^&]+)\\begin\{document}//;
370: $output =~ s/\\end\{document}//;
371: # $output = '\parbox{\minipagewidth}{ '.$output.' }';
372: #some additional cleanup necessary for LateX (due to limitations of table environment
373: $output =~ s/(\\vskip\s*\d+mm)\s*(\\\\)+/$1/g;
374: }
375: my $matheditor;
376: if ($output =~ /\Qjavascript:LC_mathedit_HWVAL_\E/) {
377: $matheditor = 'dragmath';
378: } elsif ($output =~ /LCmathField/) {
379: $matheditor = 'lcmath';
380: }
381: my $parser=HTML::TokeParser->new(\$output);
382: my $token;
383: my $thisdir=$src;
384: my $bodydef=0;
385: my $thisxml=0;
386: my @rlinks=();
387: if ($output=~/\?xml/) {
388: $isxml=1;
389: $thisxml=1;
390: $output=~
391: /((?:\<(?:\?xml|\!DOC|html)[^\>]*(?:\>|\>\]\>)\s*)+)\<body[^\>]*\>/si;
392: $xmlheader=$1;
393: }
394: while ($token=$parser->get_token) {
395: if ($token->[0] eq 'S') {
396: if ($token->[1] eq 'a') {
397: if ($token->[2]->{'href'}) {
398: $rlinks[$#rlinks+1]=
399: $token->[2]->{'href'};
400: }
401: } elsif ($token->[1] eq 'img') {
402: $rlinks[$#rlinks+1]=
403: $token->[2]->{'src'};
404: } elsif ($token->[1] eq 'embed') {
405: $rlinks[$#rlinks+1]=
406: $token->[2]->{'src'};
407: } elsif ($token->[1] eq 'base') {
408: $thisdir=$token->[2]->{'href'};
409: } elsif ($token->[1] eq 'body') {
410: $bodydef=1;
411: $ssibgcolor{$_}=$token->[2]->{'bgcolor'};
412: $ssitext{$_}=$token->[2]->{'text'};
413: $ssilink{$_}=$token->[2]->{'link'};
414: $ssivlink{$_}=$token->[2]->{'vlink'};
415: $ssialink{$_}=$token->[2]->{'alink'};
416: if ($thisxml) {
417: $xmlbody=$token->[4];
418: }
419: } elsif ($token->[1] eq 'meta') {
420: if ($token->[4] !~ m:/>$:) {
421: $allmeta.="\n".$token->[4].'</meta>';
422: } else {
423: $allmeta.="\n".$token->[4];
424: }
425: } elsif (($token->[1] eq 'script') &&
426: ($bodydef==0)) {
427: $allscript.="\n\n"
428: .$parser->get_text('/script');
429: }
430: }
431: }
432: if ($output=~/\<body[^\>]*\>(.*)/si) {
433: $output=$1;
434: }
435: $output=~s/\<\/body\>.*//si;
436: if ($output=~/\<form/si) {
437: my $hastimer;
438: $nforms++;
439: $output=~s/\<form[^\>]*\>//gsi;
440: $output=~s/\<\/form[^\>]*\>//gsi;
441: if ($output=~/\<input[^\>]+name\s*=\s*[\'\"]*HWFILE/) {
442: $nuploads++;
443: }
444: if ($output=~/\<input[^\>]+name\s*=\s*[\'\"]*accessbutton/) {
445: $ntimers++;
446: $hastimer = 1;
447: }
448: $output=~
449: s/\<((?:input|select|button|textarea)[^\>]+)name\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 name="$prefix$2" $3\>/gsi;
450: $output=~
451: s/\<((?:input|select|button|textarea)[^\>]+)id\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 id="$idprefix$2" $3\>/gsi;
452: $output=~
453: s/(\Qthis.form.elements['\E)(HW(?:VAL|CHK)_[^']+\'\]\.(?:value=\'|checked))/$1$prefix$2/gsi;
454: if ($hastimer) {
455: $output=~
456: s/\<(input[^\>]+name=\Q"$prefix\Eaccessbutton"[^\>]+)(?:\Qdocument.markaccess.submit();\E)([^\>]*)\>/\<$1pageTimer(this.form,'$prefix')$2\>/gsi;
457: $output=~ s/\<(input[^\>]+name=\Q"$prefix\Emarkaccess"[^\>]+value=["'])(?:yes)(['"][^\>]*)\>/\<$1$2\>/gsi;
458: }
459: if ($matheditor eq 'dragmath') {
460: $output=~
461: s/(\Qjavascript:LC_mathedit_\E)(HWVAL_)([^'"]+?)(\(['"]*)(\QHWVAL_\E\3['"]\)\;void\(0\)\;)/$1$idprefix$2$3$4$idprefix$5/g;
462: $output=~
463: s/(function\s+LC_mathedit_)(HWVAL_)([^'"]+?)(\s+\(LCtextline\))/$1$idprefix$2$3$4/g;
464: } elsif ($matheditor eq 'lcmath') {
465: $output=~
466: s/(var\s+LCmathField\s+=\s+document\.getElementById\(['"])([^'"]+?)(['"]\)\;)/$1$idprefix$2$3/g;
467: }
468: $output=~
469: s/(\Q<div id="msg_\E)(\Qsubmit_\E)([^"]*)(\Q" style="display:none">\E)/<input type="hidden" name="$prefix$2$3_pressed" id="$idprefix$2$3_pressed" value="" \/>$1$idprefix$2$3$4/g;
470: $output=~
471: s/(\Q<td class="LC_status_\E)(\Qsubmit_\E)([^\"]*)(\s*[^\"]*"\>)/$1$idprefix$2$3$4/g;
472: if ($nuploads) {
473: ($turninpaths{$prefix},$multiresps{$prefix}) =
474: &Apache::loncommon::get_turnedin_filepath($symb,$env{'user.name'},$env{'user.domain'});
475: if ($turninparent eq '') {
476: $turninparent = $turninpaths{$prefix};
477: $turninparent =~ s{(/[^/]+)$}{};
478: }
479: }
480: $output=~
481: s/\<((?:input|select)[^\>]+\Qjavascript:setSubmittedPart\E)\(\s*[\'\"]([^\'\"]+)[\'\"]*\s*\)/\<$1('$2','$prefix')/gsi;
482: $output=~
483: s/\<(input[^\>]+\Qonfocus=\"javascript:disableAutoComplete\E)\(\'([^\']+)\'\)(;\")/\<$1('$idprefix$2')$3/gsi;
484: unless ($hastimer) {
485: if ($plainsrc =~ /$LONCAPA::assess_re/) {
486: %Apache::lonhomework::history =
487: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
488: my $type = 'problem';
489: if ($extension eq 'task') {
490: $type = 'Task';
491: }
492: my ($status,$accessmsg,$slot_name,$slot) =
493: &Apache::lonhomework::check_slot_access('0',$type,$symb);
494: undef(%Apache::lonhomework::history);
495: my $probstatus = &Apache::lonnet::EXT("resource.0.problemstatus",$symb);
496: if (($status eq 'CAN_ANSWER') || (($status eq 'CANNOT_ANSWER') &&
497: (($probstatus eq 'no') || ($probstatus eq 'no_feedback_ever'))) ||
498: (($status eq 'NOT_YET_VIEWED') && ($posthash{'markaccess'} eq 'yes'))) {
499: my ($slothastime,$timerhastime);
500: if ($slot_name ne '') {
501: if (ref($slot) eq 'HASH') {
502: if (($slot->{'starttime'} < $now) &&
503: ($slot->{'endtime'} > $now)) {
504: $slothastime = $now - $slot->{'endtime'};
505: }
506: }
507: }
508: my $duedate = &Apache::lonnet::EXT("resource.0.duedate",$symb);
509: my @interval=&Apache::lonnet::EXT("resource.0.interval",$symb);
510: if (@interval > 1) {
511: my $first_access;
512: if ($interval[1] eq 'map') {
513: my $ignorecache;
514: if ($env{'form.'.$prefix.'markaccess'} eq 'yes') {
515: $ignorecache = 1;
516: }
517: $first_access=&Apache::lonnet::get_first_access($interval[1],undef,$pagesymb,$ignorecache);
518: if (($first_access) && (!$pagefirstaccess)) {
519: $pagefirstaccess = $first_access;
520: }
521: } else {
522: $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
523: }
524: if ($first_access > 0) {
525: my ($timelimit) = ($interval[0] =~ /^(\d+)/);
526: if ($timelimit) {
527: my $timeremains = $timelimit + $first_access - $now;
528: if ($timeremains > 0) {
529: $timerhastime = $timeremains;
530: }
531: }
532: }
533: }
534: if (($duedate && $duedate > $now) ||
535: (!$duedate && $timerhastime > 0) ||
536: ($slot_name ne '' && $slothastime)) {
537: if ((@interval > 1 && $timerhastime) ||
538: ($type eq 'Task' && $slothastime)) {
539: $countdowndisp{$symb} = 'inline';
540: if ((@interval > 1) && ($timerhastime)) {
541: $hastimeleft{$symb} = $timerhastime;
542: if ($pagefirstaccess) {
543: my ($timelimit,$usesdone,$donebuttontext,$proctor,$secret);
544: ($timelimit,my $donesuffix) = split(/_/,$interval[0],2);
545: if ($donesuffix =~ /^done\:([^\:]+)\:(.*)$/) {
546: $usesdone = 'done';
547: $donebuttontext = $1;
548: (undef,$proctor,$secret) = split(/_/,$2);
549: } elsif ($donesuffix =~ /^done(|_.+)$/) {
550: $donebuttontext = &mt('Done');
551: ($usesdone,$proctor,$secret) = split(/_/,$donesuffix);
552: }
553: if ($usesdone eq 'done') {
554: $donebutton{$symb} = $timelimit;
555: push(@{$buttonbytime{$timelimit}},$symb);
556: $donebtnextra{$symb} = {
557: text => $donebuttontext,
558: proctor => $proctor,
559: secret => $secret,
560: type => $interval[1],
561: };
562: }
563: }
564: } else {
565: $hastimeleft{$symb} = $slothastime;
566: }
567: } else {
568: $hastimeleft{$symb} = $duedate - $now;
569: $countdowndisp{$symb} = 'none';
570: }
571: unless ($donebutton{$symb}) {
572: $donebutton{$symb} = 0;
573: }
574: }
575: }
576: }
577: }
578: }
579: $thisdir=~s/\/[^\/]*$//;
580: foreach (@rlinks) {
581: unless (($_=~/^https?\:\/\//i) ||
582: ($_=~/^\//) ||
583: ($_=~/^javascript:/i) ||
584: ($_=~/^mailto:/i) ||
585: ($_=~/^\#/)) {
586: my $newlocation=
587: &Apache::lonnet::hreflocation($thisdir,$_);
588: $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
589: }
590: }
591: # -------------------------------------------------- Deal with Applet codebases
592: $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
593: $ssibody{$_}=$output;
594: # ---------------------------------------------------------------- End SSI cell
595: }
596: }
597: }
598: }
599: unless ($contents) {
600: &Apache::loncommon::content_type($r,'text/html');
601: $r->send_http_header;
602: $r->print(&Apache::loncommon::start_page(undef,undef,
603: {'force_register' => 1,}));
604: $r->print(&mt('This page is either empty or it only contains resources that are currently hidden').'. ');
605: $r->print('<br /><br />'.&mt('Please use the LON-CAPA navigation arrows to move to another item in the course').
606: &Apache::loncommon::end_page());
607: } else {
608: # ------------------------------------------------------------------ Build page
609:
610: # ---------------------------------------------------------------- Send headers
611: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
612: if ($isxml) {
613: &Apache::loncommon::content_type($r,'text/xml');
614: } else {
615: &Apache::loncommon::content_type($r,'text/html');
616: }
617: $r->send_http_header;
618: # ------------------------------------------------------------------------ Head
619: if ($allscript) {
620: $allscript =
621: "\n".'<script type="text/javascript">'."\n".
622: $allscript.
623: "\n</script>\n";
624: }
625: if (($nforms) && ($nuploads)) {
626: $allscript .= &Apache::lonhtmlcommon::file_submissionchk_js(\%turninpaths,\%multiresps).
627: '<script type="text/javascript" '.
628: 'src="/res/adm/includes/file_upload.js"></script>';
629: }
630: if (($nforms) && (&Apache::lonhtmlcommon::htmlareabrowser())) {
631: my %textarea_args = (
632: dragmath => 'math',
633: );
634: $allscript .= &Apache::lonhtmlcommon::htmlareaselectactive(\%textarea_args);
635: }
636: if ($ntimers) {
637: $allscript .= '<script type="text/javascript">'."\n".
638: '// <![CDATA['."\n".
639: 'function pageTimer(form,prefix) {'."\n".
640: " form.elements[prefix+'markaccess'].value = 'yes';\n".
641: " form.submit();\n".
642: '}'."\n".
643: '// ]]>'.
644: "\n</script>\n";
645: }
646: if (keys(%hastimeleft)) {
647: my (%uniquetimes,%uniquedisplays);
648: foreach my $item (values(%hastimeleft)) {
649: if (exists($uniquetimes{$item})) {
650: $uniquetimes{$item} ++;
651: } else {
652: $uniquetimes{$item} = 1;
653: }
654: }
655: if (scalar(keys(%uniquetimes)) == 1) {
656: my (%uniquedisplays,%uniquedones,$currdisp,$donebuttontime,
657: $donebuttonextras);
658: if (keys(%countdowndisp)) {
659: foreach my $item (values(%countdowndisp)) {
660: if (exists($uniquedisplays{$item})) {
661: $uniquedisplays{$item} ++;
662: } else {
663: $uniquedisplays{$item} = 1;
664: }
665: }
666: my @countdowndisplay = keys(%uniquedisplays);
667: if (scalar(@countdowndisplay) == 1) {
668: $currdisp = $countdowndisplay[0];
669: }
670: }
671: if (keys(%donebutton)) {
672: foreach my $item (values(%donebutton)) {
673: if (exists($uniquedones{$item})) {
674: $uniquedones{$item} ++;
675: } else {
676: $uniquedones{$item} = 1;
677: }
678: }
679: my @donebuttons = sort { $ <=> $b } (keys(%uniquedones));
680: if (scalar(@donebuttons) == 1) {
681: if ($donebuttons[0]) {
682: $donebuttontime = $donebuttons[0];
683: if (ref($buttonbytime{$donebuttontime}) eq 'ARRAY') {
684: $donebuttonextras = $donebtnextra{$buttonbytime{$donebuttontime}->[0]};
685: }
686: }
687: }
688: }
689: &add_countdown_timer($currdisp,$donebuttontime,$donebuttonextras);
690: }
691: }
692: my $pagebuttonshide;
693: if (keys(%buttonshide)) {
694: my %uniquebuttonhide;
695: foreach my $item (values(%buttonshide)) {
696: if (exists($uniquebuttonhide{$item})) {
697: $uniquebuttonhide{$item} ++;
698: } else {
699: $uniquebuttonhide{$item} = 1;
700: }
701: }
702: if (keys(%uniquebuttonhide) == 1) {
703: if (lc((keys(%uniquebuttonhide))[0]) eq 'yes') {
704: $pagebuttonshide = 'yes';
705: }
706: }
707: }
708: # ------------------------------------------------------------------ Start body
709: $r->print(&Apache::loncommon::start_page(undef,$allscript,
710: {'force_register' => 1,
711: 'bgcolor' => '#ffffff',
712: 'hide_buttons' => $pagebuttonshide}));
713: # ------------------------------------------------------------------ Start form
714: if ($nforms) {
715: my $fmtag = '<form name="lonhomework" method="post" enctype="multipart/form-data"';
716: if ($nuploads) {
717: my $multi;
718: if ($nuploads > 1) {
719: $multi = 1;
720: }
721: $fmtag .= 'onsubmit="return file_submission_check(this,'."'$turninparent','$multi'".');"';
722: }
723: $fmtag .= ' action="'.
724: &Apache::lonenc::check_encrypt($requrl)
725: .'" id="LC_page">';
726: $r->print($fmtag);
727: }
728: } elsif (($target eq 'tex') || ($target eq 'tex_answer')) {
729: # I think this is not needed as the header
730: # will be put in for each of the page parts
731: # by the londefdef.pm now that we are opening up
732: # the parts of a page.
733: #$r->print('\documentclass{article}
734: # \newcommand{\keephidden}[1]{}
735: # \usepackage[dvips]{graphicx}
736: # \usepackage{epsfig}
737: # \usepackage{calc}
738: # \usepackage{longtable}
739: # \begin{document}');
740: }
741: # ----------------------------------------------------------------- Start table
742: if (($target eq 'tex') || ($target eq 'tex_answer')) {
743: # # $r->print('\begin{longtable}INSERTTHEHEADOFLONGTABLE\endfirsthead\endhead ');
744: if ($number_of_columns le $lcm) {$number_of_columns=$lcm;};
745: } else {
746: $r->print('<table width="100%" cols="'.$lcm.'" border="0">');
747: }
748: # generate rows
749: for ($i=0;$i<=$#rows;$i++) {
750: if ($rows[$i]) {
751: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
752: $r->print("\n<tr>");
753: }
754: my @colcont=split(/\&/,$rows[$i]);
755: my $avespan=$lcm/($#colcont+1);
756: for ($j=0;$j<=$#colcont;$j++) {
757: my $rid=$colcont[$j];
758: my $metainfo =&get_buttons(\%hash,$rid,\%buttonshide,$hostname).'<br />';
759: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
760: $r->print('<td colspan="'.$avespan.'"');
761: }
762: if (($cellemb{$rid} eq 'ssi') || ($cellexternal{$rid})) {
763: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
764: if ($ssibgcolor{$rid}) {
765: $r->print(' bgcolor="'.
766: $ssibgcolor{$rid}.'"');
767: }
768: $r->print('>'.$metainfo.'<font');
769:
770: if ($ssitext{$rid}) {
771: $r->print(' text="'.$ssitext{$rid}.'"');
772: }
773: if ($ssilink{$rid}) {
774: $r->print(' link="'.$ssilink{$rid}.'"');
775: }
776: if ($ssitext{$rid}) {
777: $r->print(' vlink="'.$ssivlink{$rid}.'"');
778: }
779: if ($ssialink{$rid}) {
780: $r->print(' alink="'.$ssialink{$rid}.'"');
781: }
782: $r->print('>');
783: }
784: unless (($cellexternal{$rid}) &&
785: ($target eq 'tex') && ($target eq 'tex_answer')) {
786: $r->print($ssibody{$rid});
787: }
788: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
789: $r->print('</font>');
790: }
791: if ($env{'course.'.
792: $env{'request.course.id'}.
793: '.pageseparators'} eq 'yes') {
794: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
795: $r->print('<hr />');
796: }
797: }
798: } elsif ($cellemb{$rid} eq 'img') {
799: $r->print('>'.$metainfo.'<img src="'.
800: $hash{'src_'.$rid}.'" />');
801: } elsif ($cellemb{$rid} eq 'emb') {
802: $r->print('>'.$metainfo.'<embed src="'.
803: $hash{'src_'.$rid}.'"></embed>');
804: } elsif (&Apache::lonnet::declutter($hash{'src_'.$rid}) !~/\.(sequence|page)$/) {
805: $r->print($metainfo.'<b>'.$hash{'title_'.$rid}.'</b><br />');
806: unless ($cellemb{$rid} eq 'wrp') {
807: $r->print(&mt('It is recommended that you use an up-to-date virus scanner before handling this file.'));
808: }
809: $r->print('</p><p><table>'.
810: &Apache::londocs::entryline(0,
811: &mt("Click to download or use your browser's Save Link function"),
812: '/'.&Apache::lonnet::declutter($hash{'src_'.$rid})).
813: '</table></p><br />');
814: }
815: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
816: $r->print('</td>');
817: } else {
818: # for (my $incol=1;$incol<=$avespan;$incol++) {
819: # $r->print(' & ');
820: # }
821: }
822: }
823: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
824: $r->print('</tr>');
825: } else {
826: # $r->print('REMOVETHEHEADOFLONGTABLE\\\\');
827: }
828: }
829: }
830: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
831: $r->print("\n</table>");
832: } else {
833: # $r->print('\end{longtable}\strut');
834: }
835: # ---------------------------------------------------------------- Submit, etc.
836: if ($nforms) {
837: my $class;
838: if ($nforms > 1) {
839: $class = ' class="LC_hwk_submit"';
840: if ($ntimers) {
841: $nforms = 1;
842: $class = '';
843: }
844: }
845: $r->print(
846: '<input name="all_submit" value="'.&mt('Submit All').'" type="'.
847: (($nforms>1)?'submit':'hidden').'"'.$class.' id="all_submit" />'.
848: '<input type="hidden" name="all_submit_pressed" '.
849: 'id="all_submit_pressed" value="" />'.
850: '<div id="msg_all_submit" style="display:none">'.
851: &mt('Processing your submission ...').'</div></form>');
852: }
853: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
854: $r->print(&Apache::loncommon::end_page({'discussion'
855: => 1,}));
856: } else {
857: $r->print('\end{document}'.$number_of_columns);
858: }
859: &Apache::lonnet::symblist($requrl,%symbhash);
860: my ($map,$id,$url)=&Apache::lonnet::decode_symb(&Apache::lonnet::symbread());
861: &Apache::lonnet::symblist($map,'last_known'=>[$url,$id]);
862: # -------------------------------------------------------------------- End page
863: }
864: # ------------------------------------------------------------- End render page
865: } else {
866: &Apache::loncommon::content_type($r,'text/html');
867: $r->send_http_header;
868: &Apache::lonsequence::viewmap($r,$requrl);
869: }
870: # ------------------------------------------------------------------ Untie hash
871: unless (untie(%hash)) {
872: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
873: "Could not untie coursemap $fn (browse).</font>");
874: }
875: # -------------------------------------------------------------------- All done
876: return OK;
877: # ----------------------------------------------- Errors, hash could no be tied
878: }
879: }
880: }
881: &Apache::loncommon::content_type($r,'text/html');
882: $r->send_http_header;
883: &Apache::lonsequence::viewmap($r,$requrl);
884: return OK;
885: }
886:
887: sub get_buttons {
888: my ($hash,$rid,$buttonshide,$hostname) = @_;
889:
890: my $metainfo = '';
891: my $esrc=&Apache::lonnet::declutter($hash->{'src_'.$rid});
892: my ($mapid,$resid)=split(/\./,$rid);
893: my $symb=&Apache::lonnet::encode_symb($hash->{'map_id_'.$mapid},
894: $resid,
895: $hash->{'src_'.$rid});
896: unless ($env{'request.role.adv'}) {
897: if ($buttonshide->{$symb} eq 'yes') {
898: return;
899: }
900: }
901: if ($hash->{'encrypted_'.$rid}) {
902: $symb=&Apache::lonenc::encrypted($symb);
903: $esrc=&Apache::lonenc::encrypted($esrc);
904: }
905: if ($hash->{'src_'.$rid} !~ m-^/uploaded/-
906: && $hash->{'src_'.$rid} !~ m{^https?://}
907: && !$env{'request.enc'}
908: && ($env{'request.role.adv'}
909: || !$hash->{'encrypted_'.$rid})) {
910: $metainfo .='<a name="'.&escape($symb).'" />'.
911: '<a href="'.$hash->{'src_'.$rid}.'.meta'.'" target="LONcatInfo">'.
912: '<img src="/res/adm/pages/catalog.png" class="LC_icon"'.
913: ' alt="'.&mt('Show Metadata').'"'.
914: ' title="'.&mt('Show Metadata').'" />'.
915: '</a>';
916: }
917: if (($hash->{'src_'.$rid} !~ m{^/uploaded/}) &&
918: ($hash->{'src_'.$rid} !~ m{^https?://})) {
919: $metainfo .= '<a href="/adm/evaluate?postdata='.
920: &escape($esrc).
921: '" target="LONcatInfo">'.
922: '<img src="/res/adm/pages/eval.png" class="LC_icon"'.
923: ' alt="'.&mt('Provide my evaluation of this resource').'"'.
924: ' title="'.&mt('Provide my evaluation of this resource').'" />'.
925: '</a>';
926: }
927: if (($hash->{'src_'.$rid}=~/$LONCAPA::assess_re/) &&
928: ($hash->{'src_'.$rid} !~ m-^/uploaded/-)) {
929:
930: if (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {
931: $metainfo.=
932: '<a href="/adm/grades?symb='.&escape($symb).
933: # '&command=submission" target="LONcatInfo">'.
934: '&command=submission">'.
935: '<img src="/adm/lonMisc/subm_button.png" class="LC_icon"'.
936: ' alt="'.&mt('View Submissions for a Student or a Group of Students').'"'.
937: ' title="'.&mt('View Submissions for a Student or a Group of Students').'" />'.
938: '</a>'.
939: '<a href="/adm/grades?symb='.&escape($symb).
940: # '&command=gradingmenu" target="LONcatInfo">'.
941: '&command=gradingmenu">'.
942: '<img src="/res/adm/pages/pgrd.png" class="LC_icon"'.
943: ' alt="'.&mt('Content Grades').'"'.
944: ' title="'.&mt('Content Grades').'" />'.
945: '</a>';
946: }
947: if (&Apache::lonnet::allowed('opa',$env{'request.course.id'})) {
948: $metainfo.=
949: '<a href="/adm/parmset?symb='.&escape($symb).
950: # '" target="LONcatInfo">'.
951: '" >'.
952: '<img src="/adm/lonMisc/pprm_button.png" class="LC_icon"'.
953: ' alt="'.&mt('Content Settings').'"'.
954: ' title="'.&mt('Content Settings').'" />'.
955: '</a>';
956: }
957: }
958: if ($env{'request.course.id'}) {
959: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
960: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
961: my $file=&Apache::lonnet::declutter($hash->{'src_'.$rid});
962: my $editbutton = '';
963: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
964: my ($cfile,$home,$switchserver,$forceedit,$forceview) =
965: &Apache::lonnet::can_edit_resource($file,$cnum,$cdom,$hash->{'src_'.$rid},$symb);
966: if ($cfile ne '') {
967: my $jscall = &Apache::lonhtmlcommon::jump_to_editres($cfile,$home,$switchserver,
968: $forceedit,1,$symb,undef,
969: &escape($env{'form.title'}),
970: $hostname);
971: if ($jscall) {
972: $editbutton = 1;
973: my $icon = 'pcstr.png';
974: my $label = &mt('Edit');
975: my $title = &mt('Edit this resource');
976: my $pic = '<img src="'.&Apache::loncommon::lonhttpdurl('/res/adm/pages/'.$icon).'"'.
977: ' class="LC_icon" alt="'.$label.'" title="'.$title.'" />';
978: $metainfo .= ' <a href="javascript:'.$jscall.';">'.$pic.'</a>';
979: }
980: }
981: }
982: if ((!$editbutton) && ($file=~/$LONCAPA::assess_re/)) {
983: my $url = &Apache::lonnet::clutter($file);
984: my $viewsrcbutton;
985: if ((&Apache::lonnet::allowed('cre','/')) &&
986: (&Apache::lonnet::metadata($url,'sourceavail') eq 'open')) {
987: $viewsrcbutton = 1;
988: } elsif (&Apache::lonnet::allowed('vxc',$env{'request.course.id'})) {
989: if ($url =~ m{^\Q/res/$cdom/\E($LONCAPA::match_username)/}) {
990: my $auname = $1;
991: if (($env{'request.course.adhocsrcaccess'} ne '') &&
992: (grep(/^\Q$auname\E$/,split(/,/,$env{'request.course.adhocsrcaccess'})))) {
993: $viewsrcbutton = 1;
994: } elsif ((&Apache::lonnet::metadata($url,'sourceavail') eq 'open') &&
995: (&Apache::lonnet::allowed('bre','/'))) {
996: $viewsrcbutton = 1;
997: }
998: }
999: }
1000: if ($viewsrcbutton) {
1001: my $icon = 'pcstr.png';
1002: my $label = &mt('View Source');
1003: my $title = &mt('View source code');
1004: my $jsrid = $rid;
1005: $jsrid =~ s/\./_/g;
1006: my $showurl = &escape(&Apache::lonenc::check_encrypt($url));
1007: my $pic = '<img src="'.&Apache::loncommon::lonhttpdurl('/res/adm/pages/'.$icon).'"'.
1008: ' class="LC_icon" alt="'.$label.'" title="'.$title.'" />';
1009: $metainfo .= ' <a href="javascript:open_source_'.$jsrid.'();">'.$pic.'</a>'."\n".
1010: '<script type="text/javascript">'."\n".
1011: "function open_source_$jsrid() {\n".
1012: " sourcewin=window.open('/adm/source?inhibitmenu=yes&viewonly=1&filename=$showurl','LONsource',".
1013: "'height=500,width=600,resizable=yes,location=no,menubar=no,toolbar=no,scrollbars=yes');\n".
1014: "}\n".
1015: "</script>\n";
1016: }
1017: }
1018: }
1019: return $metainfo;
1020: }
1021:
1022: sub add_countdown_timer {
1023: my ($currdisp,$donebuttontime,$donebuttonextras) = @_;
1024: my ($collapse,$expand,$alttxt,$title,$donebutton);
1025: if ($currdisp eq 'inline') {
1026: $collapse = '► ';
1027: } else {
1028: $expand = '◄ ';
1029: }
1030: if ($donebuttontime) {
1031: my ($type,$proctor,$donebuttontext);
1032: if (ref($donebuttonextras) eq 'HASH') {
1033: $proctor = $donebuttonextras->{'proctor'};
1034: $donebuttontext = $donebuttonextras->{'text'};
1035: $type = $donebuttonextras->{'type'};
1036: } else {
1037: $donebuttontext = &mt('Done');
1038: $type = 'map';
1039: }
1040: $donebutton =
1041: &Apache::lonmenu::done_button_js($type,'','',$proctor,$donebuttontext);
1042: }
1043: unless ($env{'environment.icons'} eq 'iconsonly') {
1044: $alttxt = &mt('Timer');
1045: $title = $alttxt.' ';
1046: }
1047: my $desc = &mt('Countdown to due date/time');
1048: my $output = <<END;
1049: $donebutton
1050: <a href="javascript:toggleCountdown();" class="LC_menubuttons_link">
1051: <span id="ddcountcollapse" class="LC_menubuttons_inline_text">
1052: $collapse
1053: </span></a>
1054: <span id="duedatecountdown" class="LC_menubuttons_inline_text" style="display: $currdisp;"></span>
1055: <a href="javascript:toggleCountdown();" class="LC_menubuttons_link">
1056: <span id="ddcountexpand" class="LC_menubuttons_inline_text" >$expand</span>
1057: <img src="/res/adm/pages/timer.png" title="$desc" class="LC_icon" alt="$alttxt" /><span class="LC_menubuttons_inline_text">$title</span></a>
1058: END
1059: &Apache::lonhtmlcommon::clear_breadcrumb_tools();
1060: &Apache::lonhtmlcommon::add_breadcrumb_tool('tools',$output);
1061: return;
1062: }
1063:
1064:
1065: 1;
1066: __END__
1067:
1068:
1069: =head1 NAME
1070:
1071: Apache::lonpage - Page Handler
1072:
1073: =head1 SYNOPSIS
1074:
1075: Invoked by /etc/httpd/conf/srm.conf:
1076:
1077: <LocationMatch "^/res/.*\.page$>
1078: SetHandler perl-script
1079: PerlHandler Apache::lonpage
1080: </LocationMatch>
1081:
1082: =head1 INTRODUCTION
1083:
1084: This module renders a .page resource.
1085:
1086: This is part of the LearningOnline Network with CAPA project
1087: described at http://www.lon-capa.org.
1088:
1089: =head1 HANDLER SUBROUTINE
1090:
1091: This routine is called by Apache and mod_perl.
1092:
1093: =over 4
1094:
1095: =item *
1096:
1097: set document type for header only
1098:
1099: =item *
1100:
1101: tie db file
1102:
1103: =item *
1104:
1105: render page
1106:
1107: =item *
1108:
1109: add to symb list
1110:
1111: =item *
1112:
1113: page parms
1114:
1115: =item *
1116:
1117: Get SSI output, post parameters
1118:
1119: =item *
1120:
1121: SSI cell rendering
1122:
1123: =item *
1124:
1125: Deal with Applet codebases
1126:
1127: =item *
1128:
1129: Build page
1130:
1131: =item *
1132:
1133: send headers
1134:
1135: =item *
1136:
1137: start body
1138:
1139: =item *
1140:
1141: start form
1142:
1143: =item *
1144:
1145: start table
1146:
1147: =item *
1148:
1149: submit element, etc, render page, untie hash
1150:
1151: =back
1152:
1153: =head1 OTHER SUBROUTINES
1154:
1155: =over 4
1156:
1157: =item *
1158:
1159: euclid() : Euclid's method for determining the greatest common denominator.
1160:
1161: =item *
1162:
1163: tracetable() : Build page table.
1164:
1165: =back
1166:
1167: =cut
1168:
1169:
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