1: # The LearningOnline Network with CAPA
2: # Page Handler
3: #
4: # $Id: lonpage.pm,v 1.122 2017/02/22 22:10:20 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 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,%donebutton,
197: %donebtnextra,%buttonbytime,$donetime,$symbtosetdone);
198: my ($pagesymb,$courseid,$domain,$name)=&Apache::lonnet::whichuser();
199: unless ($pagesymb) {
200: $pagesymb=&Apache::lonnet::symbread($requrl);
201: }
202: if ($pagesymb && ($courseid ne '') && ($domain ne '') && ($name ne '')) {
203: my %times=&Apache::lonnet::get('firstaccesstimes',
204: [$courseid."\0".$pagesymb],
205: $domain,$name);
206: if ($times{$courseid."\0".$pagesymb} =~ /^\d+$/) {
207: $pagefirstaccess = $times{$courseid."\0".$pagesymb};
208: if ($pagefirstaccess && $env{'form.LC_interval_done'} eq 'true') {
209: $donetime = $now - $pagefirstaccess;
210: }
211: }
212: }
213:
214: # ----------------------------------------------------------------- Render page
215:
216: @rows=();
217:
218: &tracetable(0,$firstres,'&');
219:
220: # ------------------------------------------------------------ Add to symb list
221:
222: my $i;
223: my %symbhash=();
224: for ($i=0;$i<=$#rows;$i++) {
225: if ($rows[$i]) {
226: my @colcont=split(/\&/,$rows[$i]);
227: foreach my $rid (@colcont) {
228: my ($mapid,$resid)=split(/\./,$rid);
229: $symbhash{$hash{'src_'.$rid}}=
230: [$hash{'src_'.$rid},$resid];
231: if (($donetime) && ($symbtosetdone eq '')) {
232: my $src = $hash{'src_'.$rid};
233: if ($hash{'encrypted_'.$rid}) {
234: $src=&Apache::lonenc::encrypted($src);
235: }
236: my ($mapid,$resid)=split(/\./,$rid);
237: my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$src);
238: if ($src =~ /$LONCAPA::assess_re/) {
239: my @interval=&Apache::lonnet::EXT("resource.0.interval",$symb);
240: if (@interval > 1) {
241: if (($interval[1] eq 'map') && ($pagefirstaccess)) {
242: my ($timelimit) = ($interval[0] =~ /^(\d+)/);
243: if ($timelimit) {
244: if ($pagefirstaccess + $timelimit > $now) {
245: $symbtosetdone = $symb;
246: }
247: }
248: }
249: }
250: }
251: }
252: }
253: }
254: }
255: &Apache::lonnet::symblist($requrl,%symbhash);
256:
257: # ------------------------------------------------------------------ Page parms
258:
259: my $j;
260: my $lcm=1;
261: my $contents=0;
262: my $nforms=0;
263: my $nuploads=0;
264: my $ntimers=0;
265: my %turninpaths;
266: my %multiresps;
267: my $turninparent;
268:
269: my %ssibody=();
270: my %ssibgcolor=();
271: my %ssitext=();
272: my %ssilink=();
273: my %ssivlink=();
274: my %ssialink=();
275:
276: my %cellemb=();
277: my %cellexternal=();
278:
279: my $allscript='';
280: my $allmeta='';
281:
282: my $isxml=0;
283: my $xmlheader='';
284: my $xmlbody='';
285:
286: # ---------------------------------------------------------- Handle Done button
287:
288: # Set the event timer to zero if the "done button" was clicked.
289: if ($donetime && $symbtosetdone) {
290: &Apache::lonparmset::storeparm_by_symb_inner($symbtosetdone,'0_interval',
291: 2,$donetime,'date_interval',
292: $name,$domain);
293: undef($env{'form.LC_interval_done'});
294: }
295:
296: # --------------------------------------------- Get SSI output, post parameters
297:
298: for ($i=0;$i<=$#rows;$i++) {
299: if ($rows[$i]) {
300: $contents++;
301: my @colcont=split(/\&/,$rows[$i]);
302: $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1));
303: foreach (@colcont) {
304: my $src=$hash{'src_'.$_};
305: my $plainsrc = $src;
306: my ($extension)=($src=~/\.(\w+)$/);
307: $cellexternal{$_}=($hash{'ext_'.$_} eq 'true:');
308: if ($hash{'encrypted_'.$_}) {
309: $src=&Apache::lonenc::encrypted($src);
310: }
311: my ($mapid,$resid)=split(/\./,$_);
312: my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$src);
313: unless ($env{'request.role.adv'}) {
314: $buttonshide{$symb} = &Apache::lonnet::EXT("resource.0.buttonshide",$symb);
315: }
316: $cellemb{$_}=
317: &Apache::loncommon::fileembstyle($extension);
318: if ($cellexternal{$_}) {
319: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
320: $ssibody{$_} = <<ENDEXT;
321: <iframe src="$src" width="100%">No iframe support!</iframe>
322: ENDEXT
323: }
324: } elsif ($cellemb{$_} eq 'ssi') {
325: # --------------------------------------------------------- This is an SSI cell
326: my $prefix=$_.'_';
327: my $idprefix= join('_',($mapid,$resid,''));
328: my %posthash=('request.prefix' => $prefix,
329: 'LONCAPA_INTERNAL_no_discussion' => 'true',
330: 'symb' => $symb);
331: if (($env{'form.grade_target'} eq 'tex') ||
332: ($env{'form.answer_output_mode'} eq 'tex')) {
333: $posthash{'grade_target'}=$env{'form.grade_target'};
334: $posthash{'textwidth'}=$env{'form.textwidth'};
335: $posthash{'problem_split'}=$env{'form.problem_split'};
336: $posthash{'latex_type'}=$env{'form.latex_type'};
337: $posthash{'rndseed'}=$env{'form.rndseed'};
338: $posthash{'answer_output_mode'} = $env{'form.answer_output_mode'};
339: }
340: my $submitted=exists($env{'form.all_submit'});
341: if (!$submitted) {
342: foreach my $key (keys(%env)) {
343: if ($key=~/^form.\Q$prefix\Esubmit_/) {
344: $submitted=1;last;
345: }
346: }
347: }
348: if ($submitted) {
349: foreach my $key (keys(%env)) {
350: if ($key=~/^form.\Q$prefix\E/) {
351: my $name=$key;
352: $name=~s/^form.\Q$prefix\E//;
353: $posthash{$name}=$env{$key};
354: }
355: }
356: if (exists($env{'form.all_submit'})) {
357: $posthash{'all_submit'}='yes';
358: }
359: }
360: my $output=Apache::lonnet::ssi($src,%posthash);
361: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
362: if (($target eq 'tex') || ($target eq 'tex_answer')) {
363: $output =~ s/^([^&]+)\\begin\{document}//;
364: $output =~ s/\\end\{document}//;
365: # $output = '\parbox{\minipagewidth}{ '.$output.' }';
366: #some additional cleanup necessary for LateX (due to limitations of table environment
367: $output =~ s/(\\vskip\s*\d+mm)\s*(\\\\)+/$1/g;
368: }
369: my $matheditor;
370: if ($output =~ /\Qjavascript:LC_mathedit_HWVAL_\E/) {
371: $matheditor = 'dragmath';
372: } elsif ($output =~ /LCmathField/) {
373: $matheditor = 'lcmath';
374: }
375: my $parser=HTML::TokeParser->new(\$output);
376: my $token;
377: my $thisdir=$src;
378: my $bodydef=0;
379: my $thisxml=0;
380: my @rlinks=();
381: if ($output=~/\?xml/) {
382: $isxml=1;
383: $thisxml=1;
384: $output=~
385: /((?:\<(?:\?xml|\!DOC|html)[^\>]*(?:\>|\>\]\>)\s*)+)\<body[^\>]*\>/si;
386: $xmlheader=$1;
387: }
388: while ($token=$parser->get_token) {
389: if ($token->[0] eq 'S') {
390: if ($token->[1] eq 'a') {
391: if ($token->[2]->{'href'}) {
392: $rlinks[$#rlinks+1]=
393: $token->[2]->{'href'};
394: }
395: } elsif ($token->[1] eq 'img') {
396: $rlinks[$#rlinks+1]=
397: $token->[2]->{'src'};
398: } elsif ($token->[1] eq 'embed') {
399: $rlinks[$#rlinks+1]=
400: $token->[2]->{'src'};
401: } elsif ($token->[1] eq 'base') {
402: $thisdir=$token->[2]->{'href'};
403: } elsif ($token->[1] eq 'body') {
404: $bodydef=1;
405: $ssibgcolor{$_}=$token->[2]->{'bgcolor'};
406: $ssitext{$_}=$token->[2]->{'text'};
407: $ssilink{$_}=$token->[2]->{'link'};
408: $ssivlink{$_}=$token->[2]->{'vlink'};
409: $ssialink{$_}=$token->[2]->{'alink'};
410: if ($thisxml) {
411: $xmlbody=$token->[4];
412: }
413: } elsif ($token->[1] eq 'meta') {
414: if ($token->[4] !~ m:/>$:) {
415: $allmeta.="\n".$token->[4].'</meta>';
416: } else {
417: $allmeta.="\n".$token->[4];
418: }
419: } elsif (($token->[1] eq 'script') &&
420: ($bodydef==0)) {
421: $allscript.="\n\n"
422: .$parser->get_text('/script');
423: }
424: }
425: }
426: if ($output=~/\<body[^\>]*\>(.*)/si) {
427: $output=$1;
428: }
429: $output=~s/\<\/body\>.*//si;
430: if ($output=~/\<form/si) {
431: my $hastimer;
432: $nforms++;
433: $output=~s/\<form[^\>]*\>//gsi;
434: $output=~s/\<\/form[^\>]*\>//gsi;
435: if ($output=~/\<input[^\>]+name\s*=\s*[\'\"]*HWFILE/) {
436: $nuploads++;
437: }
438: if ($output=~/\<input[^\>]+name\s*=\s*[\'\"]*accessbutton/) {
439: $ntimers++;
440: $hastimer = 1;
441: }
442: $output=~
443: s/\<((?:input|select|button|textarea)[^\>]+)name\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 name="$prefix$2" $3\>/gsi;
444: $output=~
445: s/\<((?:input|select|button|textarea)[^\>]+)id\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 id="$idprefix$2" $3\>/gsi;
446: if ($hastimer) {
447: $output=~
448: s/\<(input[^\>]+name=\Q"$prefix\Eaccessbutton"[^\>]+)(?:\Qdocument.markaccess.submit();\E)([^\>]*)\>/\<$1pageTimer(this.form,'$prefix')$2\>/gsi;
449: $output=~ s/\<(input[^\>]+name=\Q"$prefix\Emarkaccess"[^\>]+value=["'])(?:yes)(['"][^\>]*)\>/\<$1$2\>/gsi;
450: }
451: if ($matheditor eq 'dragmath') {
452: $output=~
453: s/(\Qjavascript:LC_mathedit_\E)(HWVAL_)([^'"]+?)(\(['"]*)(\QHWVAL_\E\3['"]\)\;void\(0\)\;)/$1$idprefix$2$3$4$idprefix$5/g;
454: $output=~
455: s/(function\s+LC_mathedit_)(HWVAL_)([^'"]+?)(\s+\(LCtextline\))/$1$idprefix$2$3$4/g;
456: } elsif ($matheditor eq 'lcmath') {
457: $output=~
458: s/(var\s+LCmathField\s+=\s+document\.getElementById\(['"])([^'"]+?)(['"]\)\;)/$1$idprefix$2$3/g;
459: }
460: $output=~
461: s/(\Q<div id="msg_\E)(\Qsubmit_\E)([^"]*)(\Q" style="display:none">\E)/<input type="hidden" name="$prefix$2$3_pressed" id="$idprefix$2$3_pressed" value="" \/>$1$idprefix$2$3$4/g;
462: $output=~
463: s/(\Q<td class="LC_status_\E)(\Qsubmit_\E)([^\"]*)(\s*[^\"]*"\>)/$1$idprefix$2$3$4/g;
464: if ($nuploads) {
465: $output=~
466: s/\<(input[^\>]+name=\"\Q$prefix\EHWFILE[^\>]+)\s*id\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\)]*)\>/\<$1 id="$prefix$2" $3\>/gsi;
467: ($turninpaths{$prefix},$multiresps{$prefix}) =
468: &Apache::loncommon::get_turnedin_filepath($symb,$env{'user.name'},$env{'user.domain'});
469: if ($turninparent eq '') {
470: $turninparent = $turninpaths{$prefix};
471: $turninparent =~ s{(/[^/]+)$}{};
472: }
473: }
474: $output=~
475: s/\<((?:input|select)[^\>]+\Qjavascript:setSubmittedPart\E)\(\s*[\'\"]([^\'\"]+)[\'\"]*\s*\)/\<$1('$2','$prefix')/gsi;
476: $output=~
477: s/\<(input[^\>]+\Qonfocus=\"javascript:disableAutoComplete\E)\(\'([^\']+)\'\)(;\")/\<$1('$idprefix$2')$3/gsi;
478: unless ($hastimer) {
479: if ($plainsrc =~ /$LONCAPA::assess_re/) {
480: %Apache::lonhomework::history =
481: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
482: my $type = 'problem';
483: if ($extension eq 'task') {
484: $type = 'Task';
485: }
486: my ($status,$accessmsg,$slot_name,$slot) =
487: &Apache::lonhomework::check_slot_access('0',$type,$symb);
488: undef(%Apache::lonhomework::history);
489: my $probstatus = &Apache::lonnet::EXT("resource.0.problemstatus",$symb);
490: if (($status eq 'CAN_ANSWER') || (($status eq 'CANNOT_ANSWER') &&
491: (($probstatus eq 'no') || ($probstatus eq 'no_feedback_ever'))) ||
492: (($status eq 'NOT_YET_VIEWED') && ($posthash{'markaccess'} eq 'yes'))) {
493: my ($slothastime,$timerhastime);
494: if ($slot_name ne '') {
495: if (ref($slot) eq 'HASH') {
496: if (($slot->{'starttime'} < $now) &&
497: ($slot->{'endtime'} > $now)) {
498: $slothastime = $now - $slot->{'endtime'};
499: }
500: }
501: }
502: my $duedate = &Apache::lonnet::EXT("resource.0.duedate",$symb);
503: my @interval=&Apache::lonnet::EXT("resource.0.interval",$symb);
504: if (@interval > 1) {
505: my $first_access;
506: if ($interval[1] eq 'map') {
507: my $ignorecache;
508: if ($env{'form.'.$prefix.'markaccess'} eq 'yes') {
509: $ignorecache = 1;
510: }
511: $first_access=&Apache::lonnet::get_first_access($interval[1],undef,$pagesymb,$ignorecache);
512: if (($first_access) && (!$pagefirstaccess)) {
513: $pagefirstaccess = $first_access;
514: }
515: } else {
516: $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
517: }
518: if ($first_access > 0) {
519: my ($timelimit) = ($interval[0] =~ /^(\d+)/);
520: if ($timelimit) {
521: my $timeremains = $timelimit + $first_access - $now;
522: if ($timeremains > 0) {
523: $timerhastime = $timeremains;
524: }
525: }
526: }
527: }
528: if (($duedate && $duedate > $now) ||
529: (!$duedate && $timerhastime > 0) ||
530: ($slot_name ne '' && $slothastime)) {
531: if ((@interval > 1 && $timerhastime) ||
532: ($type eq 'Task' && $slothastime)) {
533: $countdowndisp{$symb} = 'inline';
534: if ((@interval > 1) && ($timerhastime)) {
535: $hastimeleft{$symb} = $timerhastime;
536: if ($pagefirstaccess) {
537: my ($timelimit,$usesdone,$donebuttontext,$proctor,$secret);
538: ($timelimit,my $donesuffix) = split(/_/,$interval[0],2);
539: if ($donesuffix =~ /^done\:([^\:]+)\:(.*)$/) {
540: $usesdone = 'done';
541: $donebuttontext = $1;
542: (undef,$proctor,$secret) = split(/_/,$2);
543: } elsif ($donesuffix =~ /^done(|_.+)$/) {
544: $donebuttontext = &mt('Done');
545: ($usesdone,$proctor,$secret) = split(/_/,$donesuffix);
546: }
547: if ($usesdone eq 'done') {
548: $donebutton{$symb} = $timelimit;
549: push(@{$buttonbytime{$timelimit}},$symb);
550: $donebtnextra{$symb} = {
551: text => $donebuttontext,
552: proctor => $proctor,
553: secret => $secret,
554: type => $interval[1],
555: };
556: }
557: }
558: } else {
559: $hastimeleft{$symb} = $slothastime;
560: }
561: } else {
562: $hastimeleft{$symb} = $duedate - $now;
563: $countdowndisp{$symb} = 'none';
564: }
565: unless ($donebutton{$symb}) {
566: $donebutton{$symb} = 0;
567: }
568: }
569: }
570: }
571: }
572: }
573: $thisdir=~s/\/[^\/]*$//;
574: foreach (@rlinks) {
575: unless (($_=~/^https?\:\/\//i) ||
576: ($_=~/^\//) ||
577: ($_=~/^javascript:/i) ||
578: ($_=~/^mailto:/i) ||
579: ($_=~/^\#/)) {
580: my $newlocation=
581: &Apache::lonnet::hreflocation($thisdir,$_);
582: $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
583: }
584: }
585: # -------------------------------------------------- Deal with Applet codebases
586: $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
587: $ssibody{$_}=$output;
588: # ---------------------------------------------------------------- End SSI cell
589: }
590: }
591: }
592: }
593: unless ($contents) {
594: &Apache::loncommon::content_type($r,'text/html');
595: $r->send_http_header;
596: $r->print(&Apache::loncommon::start_page(undef,undef,
597: {'force_register' => 1,}));
598: $r->print(&mt('This page is either empty or it only contains resources that are currently hidden').'. ');
599: $r->print('<br /><br />'.&mt('Please use the LON-CAPA navigation arrows to move to another item in the course').
600: &Apache::loncommon::end_page());
601: } else {
602: # ------------------------------------------------------------------ Build page
603:
604: # ---------------------------------------------------------------- Send headers
605: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
606: if ($isxml) {
607: &Apache::loncommon::content_type($r,'text/xml');
608: } else {
609: &Apache::loncommon::content_type($r,'text/html');
610: }
611: $r->send_http_header;
612: # ------------------------------------------------------------------------ Head
613: if ($allscript) {
614: $allscript =
615: "\n".'<script type="text/javascript">'."\n".
616: $allscript.
617: "\n</script>\n";
618: }
619: if (($nforms) && ($nuploads)) {
620: $allscript .= &Apache::lonhtmlcommon::file_submissionchk_js(\%turninpaths,\%multiresps);
621: }
622: if (($nforms) && (&Apache::lonhtmlcommon::htmlareabrowser())) {
623: my %textarea_args = (
624: dragmath => 'math',
625: );
626: $allscript .= &Apache::lonhtmlcommon::htmlareaselectactive(\%textarea_args);
627: }
628: if ($ntimers) {
629: $allscript .= '<script type="text/javascript">'."\n".
630: '// <![CDATA['."\n".
631: 'function pageTimer(form,prefix) {'."\n".
632: " form.elements[prefix+'markaccess'].value = 'yes';\n".
633: " form.submit();\n".
634: '}'."\n".
635: '// ]]>'.
636: "\n</script>\n";
637: }
638: if (keys(%hastimeleft)) {
639: my (%uniquetimes,%uniquedisplays);
640: foreach my $item (values(%hastimeleft)) {
641: if (exists($uniquetimes{$item})) {
642: $uniquetimes{$item} ++;
643: } else {
644: $uniquetimes{$item} = 1;
645: }
646: }
647: if (scalar(keys(%uniquetimes)) == 1) {
648: my (%uniquedisplays,%uniquedones,$currdisp,$donebuttontime,
649: $donebuttonextras);
650: if (keys(%countdowndisp)) {
651: foreach my $item (values(%countdowndisp)) {
652: if (exists($uniquedisplays{$item})) {
653: $uniquedisplays{$item} ++;
654: } else {
655: $uniquedisplays{$item} = 1;
656: }
657: }
658: my @countdowndisplay = keys(%uniquedisplays);
659: if (scalar(@countdowndisplay) == 1) {
660: $currdisp = $countdowndisplay[0];
661: }
662: }
663: if (keys(%donebutton)) {
664: foreach my $item (values(%donebutton)) {
665: if (exists($uniquedones{$item})) {
666: $uniquedones{$item} ++;
667: } else {
668: $uniquedones{$item} = 1;
669: }
670: }
671: my @donebuttons = sort { $ <=> $b } (keys(%uniquedones));
672: if (scalar(@donebuttons) == 1) {
673: if ($donebuttons[0]) {
674: $donebuttontime = $donebuttons[0];
675: if (ref($buttonbytime{$donebuttontime}) eq 'ARRAY') {
676: $donebuttonextras = $donebtnextra{$buttonbytime{$donebuttontime}->[0]};
677: }
678: }
679: }
680: }
681: &add_countdown_timer($currdisp,$donebuttontime,$donebuttonextras);
682: }
683: }
684: my $pagebuttonshide;
685: if (keys(%buttonshide)) {
686: my %uniquebuttonhide;
687: foreach my $item (values(%buttonshide)) {
688: if (exists($uniquebuttonhide{$item})) {
689: $uniquebuttonhide{$item} ++;
690: } else {
691: $uniquebuttonhide{$item} = 1;
692: }
693: }
694: if (keys(%uniquebuttonhide) == 1) {
695: if (lc((keys(%uniquebuttonhide))[0]) eq 'yes') {
696: $pagebuttonshide = 'yes';
697: }
698: }
699: }
700: # ------------------------------------------------------------------ Start body
701: $r->print(&Apache::loncommon::start_page(undef,$allscript,
702: {'force_register' => 1,
703: 'bgcolor' => '#ffffff',
704: 'hide_buttons' => $pagebuttonshide}));
705: # ------------------------------------------------------------------ Start form
706: if ($nforms) {
707: my $fmtag = '<form name="lonhomework" method="post" enctype="multipart/form-data"';
708: if ($nuploads) {
709: my $multi;
710: if ($nuploads > 1) {
711: $multi = 1;
712: }
713: $fmtag .= 'onsubmit="return file_submission_check(this,'."'$turninparent','$multi'".');"';
714: }
715: $fmtag .= ' action="'.
716: &Apache::lonenc::check_encrypt($requrl)
717: .'" id="LC_page">';
718: $r->print($fmtag);
719: }
720: } elsif (($target eq 'tex') || ($target eq 'tex_answer')) {
721: # I think this is not needed as the header
722: # will be put in for each of the page parts
723: # by the londefdef.pm now that we are opening up
724: # the parts of a page.
725: #$r->print('\documentclass{article}
726: # \newcommand{\keephidden}[1]{}
727: # \usepackage[dvips]{graphicx}
728: # \usepackage{epsfig}
729: # \usepackage{calc}
730: # \usepackage{longtable}
731: # \begin{document}');
732: }
733: # ----------------------------------------------------------------- Start table
734: if (($target eq 'tex') || ($target eq 'tex_answer')) {
735: # # $r->print('\begin{longtable}INSERTTHEHEADOFLONGTABLE\endfirsthead\endhead ');
736: if ($number_of_columns le $lcm) {$number_of_columns=$lcm;};
737: } else {
738: $r->print('<table width="100%" cols="'.$lcm.'" border="0">');
739: }
740: # generate rows
741: for ($i=0;$i<=$#rows;$i++) {
742: if ($rows[$i]) {
743: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
744: $r->print("\n<tr>");
745: }
746: my @colcont=split(/\&/,$rows[$i]);
747: my $avespan=$lcm/($#colcont+1);
748: for ($j=0;$j<=$#colcont;$j++) {
749: my $rid=$colcont[$j];
750: my $metainfo =&get_buttons(\%hash,$rid,\%buttonshide,$hostname).'<br />';
751: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
752: $r->print('<td colspan="'.$avespan.'"');
753: }
754: if (($cellemb{$rid} eq 'ssi') || ($cellexternal{$rid})) {
755: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
756: if ($ssibgcolor{$rid}) {
757: $r->print(' bgcolor="'.
758: $ssibgcolor{$rid}.'"');
759: }
760: $r->print('>'.$metainfo.'<font');
761:
762: if ($ssitext{$rid}) {
763: $r->print(' text="'.$ssitext{$rid}.'"');
764: }
765: if ($ssilink{$rid}) {
766: $r->print(' link="'.$ssilink{$rid}.'"');
767: }
768: if ($ssitext{$rid}) {
769: $r->print(' vlink="'.$ssivlink{$rid}.'"');
770: }
771: if ($ssialink{$rid}) {
772: $r->print(' alink="'.$ssialink{$rid}.'"');
773: }
774: $r->print('>');
775: }
776: unless (($cellexternal{$rid}) &&
777: ($target eq 'tex') && ($target eq 'tex_answer')) {
778: $r->print($ssibody{$rid});
779: }
780: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
781: $r->print('</font>');
782: }
783: if ($env{'course.'.
784: $env{'request.course.id'}.
785: '.pageseparators'} eq 'yes') {
786: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
787: $r->print('<hr />');
788: }
789: }
790: } elsif ($cellemb{$rid} eq 'img') {
791: $r->print('>'.$metainfo.'<img src="'.
792: $hash{'src_'.$rid}.'" />');
793: } elsif ($cellemb{$rid} eq 'emb') {
794: $r->print('>'.$metainfo.'<embed src="'.
795: $hash{'src_'.$rid}.'"></embed>');
796: } elsif (&Apache::lonnet::declutter($hash{'src_'.$rid}) !~/\.(sequence|page)$/) {
797: $r->print($metainfo.'<b>'.$hash{'title_'.$rid}.'</b><br />');
798: unless ($cellemb{$rid} eq 'wrp') {
799: $r->print(&mt('It is recommended that you use an up-to-date virus scanner before handling this file.'));
800: }
801: $r->print('</p><p><table>'.
802: &Apache::londocs::entryline(0,
803: &mt("Click to download or use your browser's Save Link function"),
804: '/'.&Apache::lonnet::declutter($hash{'src_'.$rid})).
805: '</table></p><br />');
806: }
807: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
808: $r->print('</td>');
809: } else {
810: # for (my $incol=1;$incol<=$avespan;$incol++) {
811: # $r->print(' & ');
812: # }
813: }
814: }
815: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
816: $r->print('</tr>');
817: } else {
818: # $r->print('REMOVETHEHEADOFLONGTABLE\\\\');
819: }
820: }
821: }
822: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
823: $r->print("\n</table>");
824: } else {
825: # $r->print('\end{longtable}\strut');
826: }
827: # ---------------------------------------------------------------- Submit, etc.
828: if ($nforms) {
829: my $class;
830: if ($nforms > 1) {
831: $class = ' class="LC_hwk_submit"';
832: if ($ntimers) {
833: $nforms = 1;
834: $class = '';
835: }
836: }
837: $r->print(
838: '<input name="all_submit" value="'.&mt('Submit All').'" type="'.
839: (($nforms>1)?'submit':'hidden').'"'.$class.' id="all_submit" />'.
840: '<div id="msg_all_submit" style="display:none">'.
841: &mt('Processing your submission ...').'</div></form>');
842: }
843: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
844: $r->print(&Apache::loncommon::end_page({'discussion'
845: => 1,}));
846: } else {
847: $r->print('\end{document}'.$number_of_columns);
848: }
849: &Apache::lonnet::symblist($requrl,%symbhash);
850: my ($map,$id,$url)=&Apache::lonnet::decode_symb(&Apache::lonnet::symbread());
851: &Apache::lonnet::symblist($map,'last_known'=>[$url,$id]);
852: # -------------------------------------------------------------------- End page
853: }
854: # ------------------------------------------------------------- End render page
855: } else {
856: &Apache::loncommon::content_type($r,'text/html');
857: $r->send_http_header;
858: &Apache::lonsequence::viewmap($r,$requrl);
859: }
860: # ------------------------------------------------------------------ Untie hash
861: unless (untie(%hash)) {
862: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
863: "Could not untie coursemap $fn (browse).</font>");
864: }
865: # -------------------------------------------------------------------- All done
866: return OK;
867: # ----------------------------------------------- Errors, hash could no be tied
868: }
869: }
870: }
871: &Apache::loncommon::content_type($r,'text/html');
872: $r->send_http_header;
873: &Apache::lonsequence::viewmap($r,$requrl);
874: return OK;
875: }
876:
877: sub get_buttons {
878: my ($hash,$rid,$buttonshide,$hostname) = @_;
879:
880: my $metainfo = '';
881: my $esrc=&Apache::lonnet::declutter($hash->{'src_'.$rid});
882: my ($mapid,$resid)=split(/\./,$rid);
883: my $symb=&Apache::lonnet::encode_symb($hash->{'map_id_'.$mapid},
884: $resid,
885: $hash->{'src_'.$rid});
886: unless ($env{'request.role.adv'}) {
887: if ($buttonshide->{$symb} eq 'yes') {
888: return;
889: }
890: }
891: if ($hash->{'encrypted_'.$rid}) {
892: $symb=&Apache::lonenc::encrypted($symb);
893: $esrc=&Apache::lonenc::encrypted($esrc);
894: }
895: if ($hash->{'src_'.$rid} !~ m-^/uploaded/-
896: && $hash->{'src_'.$rid} !~ m{^https?://}
897: && !$env{'request.enc'}
898: && ($env{'request.role.adv'}
899: || !$hash->{'encrypted_'.$rid})) {
900: $metainfo .='<a name="'.&escape($symb).'" />'.
901: '<a href="'.$hash->{'src_'.$rid}.'.meta'.'" target="LONcatInfo">'.
902: '<img src="/res/adm/pages/catalog.png" class="LC_icon"'.
903: ' alt="'.&mt('Show Metadata').'"'.
904: ' title="'.&mt('Show Metadata').'" />'.
905: '</a>';
906: }
907: if (($hash->{'src_'.$rid} !~ m{^/uploaded/}) &&
908: ($hash->{'src_'.$rid} !~ m{^https?://})) {
909: $metainfo .= '<a href="/adm/evaluate?postdata='.
910: &escape($esrc).
911: '" target="LONcatInfo">'.
912: '<img src="/res/adm/pages/eval.png" class="LC_icon"'.
913: ' alt="'.&mt('Provide my evaluation of this resource').'"'.
914: ' title="'.&mt('Provide my evaluation of this resource').'" />'.
915: '</a>';
916: }
917: if (($hash->{'src_'.$rid}=~/$LONCAPA::assess_re/) &&
918: ($hash->{'src_'.$rid} !~ m-^/uploaded/-)) {
919:
920: if (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {
921: $metainfo.=
922: '<a href="/adm/grades?symb='.&escape($symb).
923: # '&command=submission" target="LONcatInfo">'.
924: '&command=submission">'.
925: '<img src="/adm/lonMisc/subm_button.png" class="LC_icon"'.
926: ' alt="'.&mt('View Submissions for a Student or a Group of Students').'"'.
927: ' title="'.&mt('View Submissions for a Student or a Group of Students').'" />'.
928: '</a>'.
929: '<a href="/adm/grades?symb='.&escape($symb).
930: # '&command=gradingmenu" target="LONcatInfo">'.
931: '&command=gradingmenu">'.
932: '<img src="/res/adm/pages/pgrd.png" class="LC_icon"'.
933: ' alt="'.&mt('Content Grades').'"'.
934: ' title="'.&mt('Content Grades').'" />'.
935: '</a>';
936: }
937: if (&Apache::lonnet::allowed('opa',$env{'request.course.id'})) {
938: $metainfo.=
939: '<a href="/adm/parmset?symb='.&escape($symb).
940: # '" target="LONcatInfo">'.
941: '" >'.
942: '<img src="/adm/lonMisc/pprm_button.png" class="LC_icon"'.
943: ' alt="'.&mt('Content Settings').'"'.
944: ' title="'.&mt('Content Settings').'" />'.
945: '</a>';
946: }
947: }
948: if (($env{'request.course.id'}) && (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
949: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
950: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
951: my $file=&Apache::lonnet::declutter($hash->{'src_'.$rid});
952: my ($cfile,$home,$switchserver,$forceedit,$forceview) =
953: &Apache::lonnet::can_edit_resource($file,$cnum,$cdom,$hash->{'src_'.$rid},$symb);
954: if ($cfile ne '') {
955: my $jscall = &Apache::lonhtmlcommon::jump_to_editres($cfile,$home,$switchserver,
956: $forceedit,1,$symb,undef,
957: &escape($env{'form.title'}),
958: $hostname);
959: if ($jscall) {
960: my $icon = 'pcstr.png';
961: my $label = &mt('Edit');
962: my $title = &mt('Edit this resource');
963: my $pic = '<img src="'.&Apache::loncommon::lonhttpdurl('/res/adm/pages/'.$icon).'"'.
964: ' class="LC_icon" alt="'.$label.'" title="'.$title.'" />';
965: $metainfo .= ' <a href="javascript:'.$jscall.';">'.$pic.'</a>';
966: }
967: }
968: }
969: return $metainfo;
970: }
971:
972: sub add_countdown_timer {
973: my ($currdisp,$donebuttontime,$donebuttonextras) = @_;
974: my ($collapse,$expand,$alttxt,$title,$donebutton);
975: if ($currdisp eq 'inline') {
976: $collapse = '► ';
977: } else {
978: $expand = '◄ ';
979: }
980: if ($donebuttontime) {
981: my ($type,$proctor,$donebuttontext);
982: if (ref($donebuttonextras) eq 'HASH') {
983: $proctor = $donebuttonextras->{'proctor'};
984: $donebuttontext = $donebuttonextras->{'text'};
985: $type = $donebuttonextras->{'type'};
986: } else {
987: $donebuttontext = &mt('Done');
988: $type = 'map';
989: }
990: $donebutton =
991: &Apache::lonmenu::done_button_js($type,'','',$proctor,$donebuttontext);
992: }
993: unless ($env{'environment.icons'} eq 'iconsonly') {
994: $alttxt = &mt('Timer');
995: $title = $alttxt.' ';
996: }
997: my $desc = &mt('Countdown to due date/time');
998: my $output = <<END;
999: $donebutton
1000: <a href="javascript:toggleCountdown();" class="LC_menubuttons_link">
1001: <span id="ddcountcollapse" class="LC_menubuttons_inline_text">
1002: $collapse
1003: </span></a>
1004: <span id="duedatecountdown" class="LC_menubuttons_inline_text" style="display: $currdisp;"></span>
1005: <a href="javascript:toggleCountdown();" class="LC_menubuttons_link">
1006: <span id="ddcountexpand" class="LC_menubuttons_inline_text" >$expand</span>
1007: <img src="/res/adm/pages/timer.png" title="$desc" class="LC_icon" alt="$alttxt" /><span class="LC_menubuttons_inline_text">$title</span></a>
1008: END
1009: &Apache::lonhtmlcommon::clear_breadcrumb_tools();
1010: &Apache::lonhtmlcommon::add_breadcrumb_tool('tools',$output);
1011: return;
1012: }
1013:
1014:
1015: 1;
1016: __END__
1017:
1018:
1019: =head1 NAME
1020:
1021: Apache::lonpage - Page Handler
1022:
1023: =head1 SYNOPSIS
1024:
1025: Invoked by /etc/httpd/conf/srm.conf:
1026:
1027: <LocationMatch "^/res/.*\.page$>
1028: SetHandler perl-script
1029: PerlHandler Apache::lonpage
1030: </LocationMatch>
1031:
1032: =head1 INTRODUCTION
1033:
1034: This module renders a .page resource.
1035:
1036: This is part of the LearningOnline Network with CAPA project
1037: described at http://www.lon-capa.org.
1038:
1039: =head1 HANDLER SUBROUTINE
1040:
1041: This routine is called by Apache and mod_perl.
1042:
1043: =over 4
1044:
1045: =item *
1046:
1047: set document type for header only
1048:
1049: =item *
1050:
1051: tie db file
1052:
1053: =item *
1054:
1055: render page
1056:
1057: =item *
1058:
1059: add to symb list
1060:
1061: =item *
1062:
1063: page parms
1064:
1065: =item *
1066:
1067: Get SSI output, post parameters
1068:
1069: =item *
1070:
1071: SSI cell rendering
1072:
1073: =item *
1074:
1075: Deal with Applet codebases
1076:
1077: =item *
1078:
1079: Build page
1080:
1081: =item *
1082:
1083: send headers
1084:
1085: =item *
1086:
1087: start body
1088:
1089: =item *
1090:
1091: start form
1092:
1093: =item *
1094:
1095: start table
1096:
1097: =item *
1098:
1099: submit element, etc, render page, untie hash
1100:
1101: =back
1102:
1103: =head1 OTHER SUBROUTINES
1104:
1105: =over 4
1106:
1107: =item *
1108:
1109: euclid() : Euclid's method for determining the greatest common denominator.
1110:
1111: =item *
1112:
1113: tracetable() : Build page table.
1114:
1115: =back
1116:
1117: =cut
1118:
1119:
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