1: # The LearningOnline Network with CAPA
2: # Page Handler
3: #
4: # $Id: lonpage.pm,v 1.120 2016/10/29 05:49:28 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 "$fn.db") {
187: my %buttonshide;
188: if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) {
189: # ------------------------------------------------------------------- Hash tied
190: my $firstres=$hash{'map_start_'.$requrl};
191: my $lastres=$hash{'map_finish_'.$requrl};
192: if (($firstres) && ($lastres)) {
193: # ------------------------------------------------------------- Countdown Timer
194: my $now = time;
195: my ($pagefirstaccess,%hastimeleft,%countdowndisp,%donebutton,
196: %donebtnextra,%buttonbytime,$donetime,$symbtosetdone);
197: my ($pagesymb,$courseid,$domain,$name)=&Apache::lonnet::whichuser();
198: unless ($pagesymb) {
199: $pagesymb=&Apache::lonnet::symbread($requrl);
200: }
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".$pagesymb};
207: if ($pagefirstaccess && $env{'form.LC_interval_done'} eq 'true') {
208: $donetime = $now - $pagefirstaccess;
209: }
210: }
211: }
212:
213: # ----------------------------------------------------------------- Render page
214:
215: @rows=();
216:
217: &tracetable(0,$firstres,'&');
218:
219: # ------------------------------------------------------------ Add to symb list
220:
221: my $i;
222: my %symbhash=();
223: for ($i=0;$i<=$#rows;$i++) {
224: if ($rows[$i]) {
225: my @colcont=split(/\&/,$rows[$i]);
226: foreach my $rid (@colcont) {
227: my ($mapid,$resid)=split(/\./,$rid);
228: $symbhash{$hash{'src_'.$rid}}=
229: [$hash{'src_'.$rid},$resid];
230: if (($donetime) && ($symbtosetdone eq '')) {
231: my $src = $hash{'src_'.$rid};
232: if ($hash{'encrypted_'.$rid}) {
233: $src=&Apache::lonenc::encrypted($src);
234: }
235: my ($mapid,$resid)=split(/\./,$rid);
236: my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$src);
237: if ($src =~ /$LONCAPA::assess_re/) {
238: my @interval=&Apache::lonnet::EXT("resource.0.interval",$symb);
239: if (@interval > 1) {
240: if (($interval[1] eq 'map') && ($pagefirstaccess)) {
241: my ($timelimit) = ($interval[0] =~ /^(\d+)/);
242: if ($timelimit) {
243: if ($pagefirstaccess + $timelimit > $now) {
244: $symbtosetdone = $symb;
245: }
246: }
247: }
248: }
249: }
250: }
251: }
252: }
253: }
254: &Apache::lonnet::symblist($requrl,%symbhash);
255:
256: # ------------------------------------------------------------------ Page parms
257:
258: my $j;
259: my $lcm=1;
260: my $contents=0;
261: my $nforms=0;
262: my $nuploads=0;
263: my $ntimers=0;
264: my %turninpaths;
265: my %multiresps;
266: my $turninparent;
267:
268: my %ssibody=();
269: my %ssibgcolor=();
270: my %ssitext=();
271: my %ssilink=();
272: my %ssivlink=();
273: my %ssialink=();
274:
275: my %cellemb=();
276: my %cellexternal=();
277:
278: my $allscript='';
279: my $allmeta='';
280:
281: my $isxml=0;
282: my $xmlheader='';
283: my $xmlbody='';
284:
285: # ---------------------------------------------------------- Handle Done button
286:
287: # Set the event timer to zero if the "done button" was clicked.
288: if ($donetime && $symbtosetdone) {
289: &Apache::lonparmset::storeparm_by_symb_inner($symbtosetdone,'0_interval',
290: 2,$donetime,'date_interval',
291: $name,$domain);
292: undef($env{'form.LC_interval_done'});
293: }
294:
295: # --------------------------------------------- Get SSI output, post parameters
296:
297: for ($i=0;$i<=$#rows;$i++) {
298: if ($rows[$i]) {
299: $contents++;
300: my @colcont=split(/\&/,$rows[$i]);
301: $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1));
302: foreach (@colcont) {
303: my $src=$hash{'src_'.$_};
304: my $plainsrc = $src;
305: my ($extension)=($src=~/\.(\w+)$/);
306: $cellexternal{$_}=($hash{'ext_'.$_} eq 'true:');
307: if ($hash{'encrypted_'.$_}) {
308: $src=&Apache::lonenc::encrypted($src);
309: }
310: my ($mapid,$resid)=split(/\./,$_);
311: my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$src);
312: unless ($env{'request.role.adv'}) {
313: $buttonshide{$symb} = &Apache::lonnet::EXT("resource.0.buttonshide",$symb);
314: }
315: $cellemb{$_}=
316: &Apache::loncommon::fileembstyle($extension);
317: if ($cellexternal{$_}) {
318: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
319: $ssibody{$_} = <<ENDEXT;
320: <iframe src="$src" width="100%">No iframe support!</iframe>
321: ENDEXT
322: }
323: } elsif ($cellemb{$_} eq 'ssi') {
324: # --------------------------------------------------------- This is an SSI cell
325: my $prefix=$_.'_';
326: my $idprefix= join('_',($mapid,$resid,''));
327: my %posthash=('request.prefix' => $prefix,
328: 'LONCAPA_INTERNAL_no_discussion' => 'true',
329: 'symb' => $symb);
330: if (($env{'form.grade_target'} eq 'tex') ||
331: ($env{'form.answer_output_mode'} eq 'tex')) {
332: $posthash{'grade_target'}=$env{'form.grade_target'};
333: $posthash{'textwidth'}=$env{'form.textwidth'};
334: $posthash{'problem_split'}=$env{'form.problem_split'};
335: $posthash{'latex_type'}=$env{'form.latex_type'};
336: $posthash{'rndseed'}=$env{'form.rndseed'};
337: $posthash{'answer_output_mode'} = $env{'form.answer_output_mode'};
338: }
339: my $submitted=exists($env{'form.all_submit'});
340: if (!$submitted) {
341: foreach my $key (keys(%env)) {
342: if ($key=~/^form.\Q$prefix\Esubmit_/) {
343: $submitted=1;last;
344: }
345: }
346: }
347: if ($submitted) {
348: foreach my $key (keys(%env)) {
349: if ($key=~/^form.\Q$prefix\E/) {
350: my $name=$key;
351: $name=~s/^form.\Q$prefix\E//;
352: $posthash{$name}=$env{$key};
353: }
354: }
355: if (exists($env{'form.all_submit'})) {
356: $posthash{'all_submit'}='yes';
357: }
358: }
359: my $output=Apache::lonnet::ssi($src,%posthash);
360: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
361: if (($target eq 'tex') || ($target eq 'tex_answer')) {
362: $output =~ s/^([^&]+)\\begin\{document}//;
363: $output =~ s/\\end\{document}//;
364: # $output = '\parbox{\minipagewidth}{ '.$output.' }';
365: #some additional cleanup necessary for LateX (due to limitations of table environment
366: $output =~ s/(\\vskip\s*\d+mm)\s*(\\\\)+/$1/g;
367: }
368: my $matheditor;
369: if ($output =~ /\Qjavascript:LC_mathedit_HWVAL_\E/) {
370: $matheditor = 'dragmath';
371: } elsif ($output =~ /LCmathField/) {
372: $matheditor = 'lcmath';
373: }
374: my $parser=HTML::TokeParser->new(\$output);
375: my $token;
376: my $thisdir=$src;
377: my $bodydef=0;
378: my $thisxml=0;
379: my @rlinks=();
380: if ($output=~/\?xml/) {
381: $isxml=1;
382: $thisxml=1;
383: $output=~
384: /((?:\<(?:\?xml|\!DOC|html)[^\>]*(?:\>|\>\]\>)\s*)+)\<body[^\>]*\>/si;
385: $xmlheader=$1;
386: }
387: while ($token=$parser->get_token) {
388: if ($token->[0] eq 'S') {
389: if ($token->[1] eq 'a') {
390: if ($token->[2]->{'href'}) {
391: $rlinks[$#rlinks+1]=
392: $token->[2]->{'href'};
393: }
394: } elsif ($token->[1] eq 'img') {
395: $rlinks[$#rlinks+1]=
396: $token->[2]->{'src'};
397: } elsif ($token->[1] eq 'embed') {
398: $rlinks[$#rlinks+1]=
399: $token->[2]->{'src'};
400: } elsif ($token->[1] eq 'base') {
401: $thisdir=$token->[2]->{'href'};
402: } elsif ($token->[1] eq 'body') {
403: $bodydef=1;
404: $ssibgcolor{$_}=$token->[2]->{'bgcolor'};
405: $ssitext{$_}=$token->[2]->{'text'};
406: $ssilink{$_}=$token->[2]->{'link'};
407: $ssivlink{$_}=$token->[2]->{'vlink'};
408: $ssialink{$_}=$token->[2]->{'alink'};
409: if ($thisxml) {
410: $xmlbody=$token->[4];
411: }
412: } elsif ($token->[1] eq 'meta') {
413: if ($token->[4] !~ m:/>$:) {
414: $allmeta.="\n".$token->[4].'</meta>';
415: } else {
416: $allmeta.="\n".$token->[4];
417: }
418: } elsif (($token->[1] eq 'script') &&
419: ($bodydef==0)) {
420: $allscript.="\n\n"
421: .$parser->get_text('/script');
422: }
423: }
424: }
425: if ($output=~/\<body[^\>]*\>(.*)/si) {
426: $output=$1;
427: }
428: $output=~s/\<\/body\>.*//si;
429: if ($output=~/\<form/si) {
430: my $hastimer;
431: $nforms++;
432: $output=~s/\<form[^\>]*\>//gsi;
433: $output=~s/\<\/form[^\>]*\>//gsi;
434: if ($output=~/\<input[^\>]+name\s*=\s*[\'\"]*HWFILE/) {
435: $nuploads++;
436: }
437: if ($output=~/\<input[^\>]+name\s*=\s*[\'\"]*accessbutton/) {
438: $ntimers++;
439: $hastimer = 1;
440: }
441: $output=~
442: s/\<((?:input|select|button|textarea)[^\>]+)name\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 name="$prefix$2" $3\>/gsi;
443: $output=~
444: s/\<((?:input|select|button|textarea)[^\>]+)id\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 id="$idprefix$2" $3\>/gsi;
445: if ($hastimer) {
446: $output=~
447: s/\<(input[^\>]+name=\Q"$prefix\Eaccessbutton"[^\>]+)(?:\Qdocument.markaccess.submit();\E)([^\>]*)\>/\<$1pageTimer(this.form,'$prefix')$2\>/gsi;
448: $output=~ s/\<(input[^\>]+name=\Q"$prefix\Emarkaccess"[^\>]+value=["'])(?:yes)(['"][^\>]*)\>/\<$1$2\>/gsi;
449: }
450: if ($matheditor eq 'dragmath') {
451: $output=~
452: s/(\Qjavascript:LC_mathedit_\E)(HWVAL_)([^'"]+?)(\(['"]*)(\QHWVAL_\E\3['"]\)\;void\(0\)\;)/$1$idprefix$2$3$4$idprefix$5/g;
453: $output=~
454: s/(function\s+LC_mathedit_)(HWVAL_)([^'"]+?)(\s+\(LCtextline\))/$1$idprefix$2$3$4/g;
455: } elsif ($matheditor eq 'lcmath') {
456: $output=~
457: s/(var\s+LCmathField\s+=\s+document\.getElementById\(['"])([^'"]+?)(['"]\)\;)/$1$idprefix$2$3/g;
458: }
459: $output=~
460: s/(\Q<div id="msg_\E)(\Qsubmit_\E)([^"]*)(\Q" style="display:none">\E)/<input type="hidden" name="$prefix$2$3_pressed" id="$idprefix$2$3_pressed" value="" \/>$1$idprefix$2$3$4/g;
461: $output=~
462: s/(\Q<td class="LC_status_\E)(\Qsubmit_\E)([^\"]*)(\s*[^\"]*"\>)/$1$idprefix$2$3$4/g;
463: if ($nuploads) {
464: $output=~
465: s/\<(input[^\>]+name=\"\Q$prefix\EHWFILE[^\>]+)\s*id\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\)]*)\>/\<$1 id="$prefix$2" $3\>/gsi;
466: ($turninpaths{$prefix},$multiresps{$prefix}) =
467: &Apache::loncommon::get_turnedin_filepath($symb,$env{'user.name'},$env{'user.domain'});
468: if ($turninparent eq '') {
469: $turninparent = $turninpaths{$prefix};
470: $turninparent =~ s{(/[^/]+)$}{};
471: }
472: }
473: $output=~
474: s/\<((?:input|select)[^\>]+\Qjavascript:setSubmittedPart\E)\(\s*[\'\"]([^\'\"]+)[\'\"]*\s*\)/\<$1('$2','$prefix')/gsi;
475: $output=~
476: s/\<(input[^\>]+\Qonfocus=\"javascript:disableAutoComplete\E)\(\'([^\']+)\'\)(;\")/\<$1('$idprefix$2')$3/gsi;
477: unless ($hastimer) {
478: if ($plainsrc =~ /$LONCAPA::assess_re/) {
479: %Apache::lonhomework::history =
480: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
481: my $type = 'problem';
482: if ($extension eq 'task') {
483: $type = 'Task';
484: }
485: my ($status,$accessmsg,$slot_name,$slot) =
486: &Apache::lonhomework::check_slot_access('0',$type,$symb);
487: undef(%Apache::lonhomework::history);
488: my $probstatus = &Apache::lonnet::EXT("resource.0.problemstatus",$symb);
489: if (($status eq 'CAN_ANSWER') || (($status eq 'CANNOT_ANSWER') &&
490: (($probstatus eq 'no') || ($probstatus eq 'no_feedback_ever'))) ||
491: (($status eq 'NOT_YET_VIEWED') && ($posthash{'markaccess'} eq 'yes'))) {
492: my ($slothastime,$timerhastime);
493: if ($slot_name ne '') {
494: if (ref($slot) eq 'HASH') {
495: if (($slot->{'starttime'} < $now) &&
496: ($slot->{'endtime'} > $now)) {
497: $slothastime = $now - $slot->{'endtime'};
498: }
499: }
500: }
501: my $duedate = &Apache::lonnet::EXT("resource.0.duedate",$symb);
502: my @interval=&Apache::lonnet::EXT("resource.0.interval",$symb);
503: if (@interval > 1) {
504: my $first_access;
505: if ($interval[1] eq 'map') {
506: my $ignorecache;
507: if ($env{'form.'.$prefix.'markaccess'} eq 'yes') {
508: $ignorecache = 1;
509: }
510: $first_access=&Apache::lonnet::get_first_access($interval[1],undef,$pagesymb,$ignorecache);
511: if (($first_access) && (!$pagefirstaccess)) {
512: $pagefirstaccess = $first_access;
513: }
514: } else {
515: $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
516: }
517: if ($first_access > 0) {
518: my ($timelimit) = ($interval[0] =~ /^(\d+)/);
519: if ($timelimit) {
520: my $timeremains = $timelimit + $first_access - $now;
521: if ($timeremains > 0) {
522: $timerhastime = $timeremains;
523: }
524: }
525: }
526: }
527: if (($duedate && $duedate > $now) ||
528: (!$duedate && $timerhastime > 0) ||
529: ($slot_name ne '' && $slothastime)) {
530: if ((@interval > 1 && $timerhastime) ||
531: ($type eq 'Task' && $slothastime)) {
532: $countdowndisp{$symb} = 'inline';
533: if ((@interval > 1) && ($timerhastime)) {
534: $hastimeleft{$symb} = $timerhastime;
535: if ($pagefirstaccess) {
536: my ($timelimit,$usesdone,$donebuttontext,$proctor,$secret);
537: ($timelimit,my $donesuffix) = split(/_/,$interval[0],2);
538: if ($donesuffix =~ /^done\:([^\:]+)\:(.*)$/) {
539: $usesdone = 'done';
540: $donebuttontext = $1;
541: (undef,$proctor,$secret) = split(/_/,$2);
542: } elsif ($donesuffix =~ /^done(|_.+)$/) {
543: $donebuttontext = &mt('Done');
544: ($usesdone,$proctor,$secret) = split(/_/,$donesuffix);
545: }
546: if ($usesdone eq 'done') {
547: $donebutton{$symb} = $timelimit;
548: push(@{$buttonbytime{$timelimit}},$symb);
549: $donebtnextra{$symb} = {
550: text => $donebuttontext,
551: proctor => $proctor,
552: secret => $secret,
553: type => $interval[1],
554: };
555: }
556: }
557: } else {
558: $hastimeleft{$symb} = $slothastime;
559: }
560: } else {
561: $hastimeleft{$symb} = $duedate - $now;
562: $countdowndisp{$symb} = 'none';
563: }
564: unless ($donebutton{$symb}) {
565: $donebutton{$symb} = 0;
566: }
567: }
568: }
569: }
570: }
571: }
572: $thisdir=~s/\/[^\/]*$//;
573: foreach (@rlinks) {
574: unless (($_=~/^https?\:\/\//i) ||
575: ($_=~/^\//) ||
576: ($_=~/^javascript:/i) ||
577: ($_=~/^mailto:/i) ||
578: ($_=~/^\#/)) {
579: my $newlocation=
580: &Apache::lonnet::hreflocation($thisdir,$_);
581: $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
582: }
583: }
584: # -------------------------------------------------- Deal with Applet codebases
585: $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
586: $ssibody{$_}=$output;
587: # ---------------------------------------------------------------- End SSI cell
588: }
589: }
590: }
591: }
592: unless ($contents) {
593: &Apache::loncommon::content_type($r,'text/html');
594: $r->send_http_header;
595: $r->print(&Apache::loncommon::start_page(undef,undef,
596: {'force_register' => 1,}));
597: $r->print(&mt('This page is either empty or it only contains resources that are currently hidden').'. ');
598: $r->print('<br /><br />'.&mt('Please use the LON-CAPA navigation arrows to move to another item in the course').
599: &Apache::loncommon::end_page());
600: } else {
601: # ------------------------------------------------------------------ Build page
602:
603: # ---------------------------------------------------------------- Send headers
604: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
605: if ($isxml) {
606: &Apache::loncommon::content_type($r,'text/xml');
607: } else {
608: &Apache::loncommon::content_type($r,'text/html');
609: }
610: $r->send_http_header;
611: # ------------------------------------------------------------------------ Head
612: if ($allscript) {
613: $allscript =
614: "\n".'<script type="text/javascript">'."\n".
615: $allscript.
616: "\n</script>\n";
617: }
618: if (($nforms) && ($nuploads)) {
619: $allscript .= &Apache::lonhtmlcommon::file_submissionchk_js(\%turninpaths,\%multiresps);
620: }
621: if (($nforms) && (&Apache::lonhtmlcommon::htmlareabrowser())) {
622: my %textarea_args = (
623: dragmath => 'math',
624: );
625: $allscript .= &Apache::lonhtmlcommon::htmlareaselectactive(\%textarea_args);
626: }
627: if ($ntimers) {
628: $allscript .= '<script type="text/javascript">'."\n".
629: '// <![CDATA['."\n".
630: 'function pageTimer(form,prefix) {'."\n".
631: " form.elements[prefix+'markaccess'].value = 'yes';\n".
632: " form.submit();\n".
633: '}'."\n".
634: '// ]]>'.
635: "\n</script>\n";
636: }
637: if (keys(%hastimeleft)) {
638: my (%uniquetimes,%uniquedisplays);
639: foreach my $item (values(%hastimeleft)) {
640: if (exists($uniquetimes{$item})) {
641: $uniquetimes{$item} ++;
642: } else {
643: $uniquetimes{$item} = 1;
644: }
645: }
646: if (scalar(keys(%uniquetimes)) == 1) {
647: my (%uniquedisplays,%uniquedones,$currdisp,$donebuttontime,
648: $donebuttonextras);
649: if (keys(%countdowndisp)) {
650: foreach my $item (values(%countdowndisp)) {
651: if (exists($uniquedisplays{$item})) {
652: $uniquedisplays{$item} ++;
653: } else {
654: $uniquedisplays{$item} = 1;
655: }
656: }
657: my @countdowndisplay = keys(%uniquedisplays);
658: if (scalar(@countdowndisplay) == 1) {
659: $currdisp = $countdowndisplay[0];
660: }
661: }
662: if (keys(%donebutton)) {
663: foreach my $item (values(%donebutton)) {
664: if (exists($uniquedones{$item})) {
665: $uniquedones{$item} ++;
666: } else {
667: $uniquedones{$item} = 1;
668: }
669: }
670: my @donebuttons = sort { $ <=> $b } (keys(%uniquedones));
671: if (scalar(@donebuttons) == 1) {
672: if ($donebuttons[0]) {
673: $donebuttontime = $donebuttons[0];
674: if (ref($buttonbytime{$donebuttontime}) eq 'ARRAY') {
675: $donebuttonextras = $donebtnextra{$buttonbytime{$donebuttontime}->[0]};
676: }
677: }
678: }
679: }
680: &add_countdown_timer($currdisp,$donebuttontime,$donebuttonextras);
681: }
682: }
683: my $pagebuttonshide;
684: if (keys(%buttonshide)) {
685: my %uniquebuttonhide;
686: foreach my $item (values(%buttonshide)) {
687: if (exists($uniquebuttonhide{$item})) {
688: $uniquebuttonhide{$item} ++;
689: } else {
690: $uniquebuttonhide{$item} = 1;
691: }
692: }
693: if (keys(%uniquebuttonhide) == 1) {
694: if (lc((keys(%uniquebuttonhide))[0]) eq 'yes') {
695: $pagebuttonshide = 'yes';
696: }
697: }
698: }
699: # ------------------------------------------------------------------ Start body
700: $r->print(&Apache::loncommon::start_page(undef,$allscript,
701: {'force_register' => 1,
702: 'bgcolor' => '#ffffff',
703: 'hide_buttons' => $pagebuttonshide}));
704: # ------------------------------------------------------------------ Start form
705: if ($nforms) {
706: my $fmtag = '<form name="lonhomework" method="post" enctype="multipart/form-data"';
707: if ($nuploads) {
708: my $multi;
709: if ($nuploads > 1) {
710: $multi = 1;
711: }
712: $fmtag .= 'onsubmit="return file_submission_check(this,'."'$turninparent','$multi'".');"';
713: }
714: $fmtag .= ' action="'.
715: &Apache::lonenc::check_encrypt($requrl)
716: .'" id="LC_page">';
717: $r->print($fmtag);
718: }
719: } elsif (($target eq 'tex') || ($target eq 'tex_answer')) {
720: # I think this is not needed as the header
721: # will be put in for each of the page parts
722: # by the londefdef.pm now that we are opening up
723: # the parts of a page.
724: #$r->print('\documentclass{article}
725: # \newcommand{\keephidden}[1]{}
726: # \usepackage[dvips]{graphicx}
727: # \usepackage{epsfig}
728: # \usepackage{calc}
729: # \usepackage{longtable}
730: # \begin{document}');
731: }
732: # ----------------------------------------------------------------- Start table
733: if (($target eq 'tex') || ($target eq 'tex_answer')) {
734: # # $r->print('\begin{longtable}INSERTTHEHEADOFLONGTABLE\endfirsthead\endhead ');
735: if ($number_of_columns le $lcm) {$number_of_columns=$lcm;};
736: } else {
737: $r->print('<table width="100%" cols="'.$lcm.'" border="0">');
738: }
739: # generate rows
740: for ($i=0;$i<=$#rows;$i++) {
741: if ($rows[$i]) {
742: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
743: $r->print("\n<tr>");
744: }
745: my @colcont=split(/\&/,$rows[$i]);
746: my $avespan=$lcm/($#colcont+1);
747: for ($j=0;$j<=$#colcont;$j++) {
748: my $rid=$colcont[$j];
749: my $metainfo =&get_buttons(\%hash,$rid,\%buttonshide).'<br />';
750: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
751: $r->print('<td colspan="'.$avespan.'"');
752: }
753: if (($cellemb{$rid} eq 'ssi') || ($cellexternal{$rid})) {
754: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
755: if ($ssibgcolor{$rid}) {
756: $r->print(' bgcolor="'.
757: $ssibgcolor{$rid}.'"');
758: }
759: $r->print('>'.$metainfo.'<font');
760:
761: if ($ssitext{$rid}) {
762: $r->print(' text="'.$ssitext{$rid}.'"');
763: }
764: if ($ssilink{$rid}) {
765: $r->print(' link="'.$ssilink{$rid}.'"');
766: }
767: if ($ssitext{$rid}) {
768: $r->print(' vlink="'.$ssivlink{$rid}.'"');
769: }
770: if ($ssialink{$rid}) {
771: $r->print(' alink="'.$ssialink{$rid}.'"');
772: }
773: $r->print('>');
774: }
775: unless (($cellexternal{$rid}) &&
776: ($target eq 'tex') && ($target eq 'tex_answer')) {
777: $r->print($ssibody{$rid});
778: }
779: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
780: $r->print('</font>');
781: }
782: if ($env{'course.'.
783: $env{'request.course.id'}.
784: '.pageseparators'} eq 'yes') {
785: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
786: $r->print('<hr />');
787: }
788: }
789: } elsif ($cellemb{$rid} eq 'img') {
790: $r->print('>'.$metainfo.'<img src="'.
791: $hash{'src_'.$rid}.'" />');
792: } elsif ($cellemb{$rid} eq 'emb') {
793: $r->print('>'.$metainfo.'<embed src="'.
794: $hash{'src_'.$rid}.'"></embed>');
795: } elsif (&Apache::lonnet::declutter($hash{'src_'.$rid}) !~/\.(sequence|page)$/) {
796: $r->print($metainfo.'<b>'.$hash{'title_'.$rid}.'</b><br />');
797: unless ($cellemb{$rid} eq 'wrp') {
798: $r->print(&mt('It is recommended that you use an up-to-date virus scanner before handling this file.'));
799: }
800: $r->print('</p><p><table>'.
801: &Apache::londocs::entryline(0,
802: &mt("Click to download or use your browser's Save Link function"),
803: '/'.&Apache::lonnet::declutter($hash{'src_'.$rid})).
804: '</table></p><br />');
805: }
806: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
807: $r->print('</td>');
808: } else {
809: # for (my $incol=1;$incol<=$avespan;$incol++) {
810: # $r->print(' & ');
811: # }
812: }
813: }
814: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
815: $r->print('</tr>');
816: } else {
817: # $r->print('REMOVETHEHEADOFLONGTABLE\\\\');
818: }
819: }
820: }
821: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
822: $r->print("\n</table>");
823: } else {
824: # $r->print('\end{longtable}\strut');
825: }
826: # ---------------------------------------------------------------- Submit, etc.
827: if ($nforms) {
828: my $class;
829: if ($nforms > 1) {
830: $class = ' class="LC_hwk_submit"';
831: if ($ntimers) {
832: $nforms = 1;
833: $class = '';
834: }
835: }
836: $r->print(
837: '<input name="all_submit" value="'.&mt('Submit All').'" type="'.
838: (($nforms>1)?'submit':'hidden').'"'.$class.' id="all_submit" />'.
839: '<div id="msg_all_submit" style="display:none">'.
840: &mt('Processing your submission ...').'</div></form>');
841: }
842: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
843: $r->print(&Apache::loncommon::end_page({'discussion'
844: => 1,}));
845: } else {
846: $r->print('\end{document}'.$number_of_columns);
847: }
848: &Apache::lonnet::symblist($requrl,%symbhash);
849: my ($map,$id,$url)=&Apache::lonnet::decode_symb(&Apache::lonnet::symbread());
850: &Apache::lonnet::symblist($map,'last_known'=>[$url,$id]);
851: # -------------------------------------------------------------------- End page
852: }
853: # ------------------------------------------------------------- End render page
854: } else {
855: &Apache::loncommon::content_type($r,'text/html');
856: $r->send_http_header;
857: &Apache::lonsequence::viewmap($r,$requrl);
858: }
859: # ------------------------------------------------------------------ Untie hash
860: unless (untie(%hash)) {
861: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
862: "Could not untie coursemap $fn (browse).</font>");
863: }
864: # -------------------------------------------------------------------- All done
865: return OK;
866: # ----------------------------------------------- Errors, hash could no be tied
867: }
868: }
869: }
870: &Apache::loncommon::content_type($r,'text/html');
871: $r->send_http_header;
872: &Apache::lonsequence::viewmap($r,$requrl);
873: return OK;
874: }
875:
876: sub get_buttons {
877: my ($hash,$rid,$buttonshide) = @_;
878:
879: my $metainfo = '';
880: my $esrc=&Apache::lonnet::declutter($hash->{'src_'.$rid});
881: my ($mapid,$resid)=split(/\./,$rid);
882: my $symb=&Apache::lonnet::encode_symb($hash->{'map_id_'.$mapid},
883: $resid,
884: $hash->{'src_'.$rid});
885: unless ($env{'request.role.adv'}) {
886: if ($buttonshide->{$symb} eq 'yes') {
887: return;
888: }
889: }
890: if ($hash->{'encrypted_'.$rid}) {
891: $symb=&Apache::lonenc::encrypted($symb);
892: $esrc=&Apache::lonenc::encrypted($esrc);
893: }
894: if ($hash->{'src_'.$rid} !~ m-^/uploaded/-
895: && $hash->{'src_'.$rid} !~ m{^https?://}
896: && !$env{'request.enc'}
897: && ($env{'request.role.adv'}
898: || !$hash->{'encrypted_'.$rid})) {
899: $metainfo .='<a name="'.&escape($symb).'" />'.
900: '<a href="'.$hash->{'src_'.$rid}.'.meta'.'" target="LONcatInfo">'.
901: '<img src="/res/adm/pages/catalog.png" class="LC_icon"'.
902: ' alt="'.&mt('Show Metadata').'"'.
903: ' title="'.&mt('Show Metadata').'" />'.
904: '</a>';
905: }
906: if (($hash->{'src_'.$rid} !~ m{^/uploaded/}) &&
907: ($hash->{'src_'.$rid} !~ m{^https?://})) {
908: $metainfo .= '<a href="/adm/evaluate?postdata='.
909: &escape($esrc).
910: '" target="LONcatInfo">'.
911: '<img src="/res/adm/pages/eval.png" class="LC_icon"'.
912: ' alt="'.&mt('Provide my evaluation of this resource').'"'.
913: ' title="'.&mt('Provide my evaluation of this resource').'" />'.
914: '</a>';
915: }
916: if (($hash->{'src_'.$rid}=~/$LONCAPA::assess_re/) &&
917: ($hash->{'src_'.$rid} !~ m-^/uploaded/-)) {
918:
919: if (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {
920: $metainfo.=
921: '<a href="/adm/grades?symb='.&escape($symb).
922: # '&command=submission" target="LONcatInfo">'.
923: '&command=submission">'.
924: '<img src="/adm/lonMisc/subm_button.png" class="LC_icon"'.
925: ' alt="'.&mt('View Submissions for a Student or a Group of Students').'"'.
926: ' title="'.&mt('View Submissions for a Student or a Group of Students').'" />'.
927: '</a>'.
928: '<a href="/adm/grades?symb='.&escape($symb).
929: # '&command=gradingmenu" target="LONcatInfo">'.
930: '&command=gradingmenu">'.
931: '<img src="/res/adm/pages/pgrd.png" class="LC_icon"'.
932: ' alt="'.&mt('Content Grades').'"'.
933: ' title="'.&mt('Content Grades').'" />'.
934: '</a>';
935: }
936: if (&Apache::lonnet::allowed('opa',$env{'request.course.id'})) {
937: $metainfo.=
938: '<a href="/adm/parmset?symb='.&escape($symb).
939: # '" target="LONcatInfo">'.
940: '" >'.
941: '<img src="/adm/lonMisc/pprm_button.png" class="LC_icon"'.
942: ' alt="'.&mt('Content Settings').'"'.
943: ' title="'.&mt('Content Settings').'" />'.
944: '</a>';
945: }
946: }
947: if (($env{'request.course.id'}) && (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
948: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
949: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
950: my $file=&Apache::lonnet::declutter($hash->{'src_'.$rid});
951: my ($cfile,$home,$switchserver,$forceedit,$forceview) =
952: &Apache::lonnet::can_edit_resource($file,$cnum,$cdom,$hash->{'src_'.$rid},$symb);
953: if ($cfile ne '') {
954: my $jscall = &Apache::lonhtmlcommon::jump_to_editres($cfile,$home,$switchserver,
955: $forceedit,1,$symb,undef,
956: &escape($env{'form.title'}));
957: if ($jscall) {
958: my $icon = 'pcstr.png';
959: my $label = &mt('Edit');
960: my $title = &mt('Edit this resource');
961: my $pic = '<img src="'.&Apache::loncommon::lonhttpdurl('/res/adm/pages/'.$icon).'"'.
962: ' class="LC_icon" alt="'.$label.'" title="'.$title.'" />';
963: $metainfo .= ' <a href="javascript:'.$jscall.';">'.$pic.'</a>';
964: }
965: }
966: }
967: return $metainfo;
968: }
969:
970: sub add_countdown_timer {
971: my ($currdisp,$donebuttontime,$donebuttonextras) = @_;
972: my ($collapse,$expand,$alttxt,$title,$donebutton);
973: if ($currdisp eq 'inline') {
974: $collapse = '► ';
975: } else {
976: $expand = '◄ ';
977: }
978: if ($donebuttontime) {
979: my ($type,$proctor,$donebuttontext);
980: if (ref($donebuttonextras) eq 'HASH') {
981: $proctor = $donebuttonextras->{'proctor'};
982: $donebuttontext = $donebuttonextras->{'text'};
983: $type = $donebuttonextras->{'type'};
984: } else {
985: $donebuttontext = &mt('Done');
986: $type = 'map';
987: }
988: $donebutton =
989: &Apache::lonmenu::done_button_js($type,'','',$proctor,$donebuttontext);
990: }
991: unless ($env{'environment.icons'} eq 'iconsonly') {
992: $alttxt = &mt('Timer');
993: $title = $alttxt.' ';
994: }
995: my $desc = &mt('Countdown to due date/time');
996: my $output = <<END;
997: $donebutton
998: <a href="javascript:toggleCountdown();" class="LC_menubuttons_link">
999: <span id="ddcountcollapse" class="LC_menubuttons_inline_text">
1000: $collapse
1001: </span></a>
1002: <span id="duedatecountdown" class="LC_menubuttons_inline_text" style="display: $currdisp;"></span>
1003: <a href="javascript:toggleCountdown();" class="LC_menubuttons_link">
1004: <span id="ddcountexpand" class="LC_menubuttons_inline_text" >$expand</span>
1005: <img src="/res/adm/pages/timer.png" title="$desc" class="LC_icon" alt="$alttxt" /><span class="LC_menubuttons_inline_text">$title</span></a>
1006: END
1007: &Apache::lonhtmlcommon::clear_breadcrumb_tools();
1008: &Apache::lonhtmlcommon::add_breadcrumb_tool('tools',$output);
1009: return;
1010: }
1011:
1012:
1013: 1;
1014: __END__
1015:
1016:
1017: =head1 NAME
1018:
1019: Apache::lonpage - Page Handler
1020:
1021: =head1 SYNOPSIS
1022:
1023: Invoked by /etc/httpd/conf/srm.conf:
1024:
1025: <LocationMatch "^/res/.*\.page$>
1026: SetHandler perl-script
1027: PerlHandler Apache::lonpage
1028: </LocationMatch>
1029:
1030: =head1 INTRODUCTION
1031:
1032: This module renders a .page resource.
1033:
1034: This is part of the LearningOnline Network with CAPA project
1035: described at http://www.lon-capa.org.
1036:
1037: =head1 HANDLER SUBROUTINE
1038:
1039: This routine is called by Apache and mod_perl.
1040:
1041: =over 4
1042:
1043: =item *
1044:
1045: set document type for header only
1046:
1047: =item *
1048:
1049: tie db file
1050:
1051: =item *
1052:
1053: render page
1054:
1055: =item *
1056:
1057: add to symb list
1058:
1059: =item *
1060:
1061: page parms
1062:
1063: =item *
1064:
1065: Get SSI output, post parameters
1066:
1067: =item *
1068:
1069: SSI cell rendering
1070:
1071: =item *
1072:
1073: Deal with Applet codebases
1074:
1075: =item *
1076:
1077: Build page
1078:
1079: =item *
1080:
1081: send headers
1082:
1083: =item *
1084:
1085: start body
1086:
1087: =item *
1088:
1089: start form
1090:
1091: =item *
1092:
1093: start table
1094:
1095: =item *
1096:
1097: submit element, etc, render page, untie hash
1098:
1099: =back
1100:
1101: =head1 OTHER SUBROUTINES
1102:
1103: =over 4
1104:
1105: =item *
1106:
1107: euclid() : Euclid's method for determining the greatest common denominator.
1108:
1109: =item *
1110:
1111: tracetable() : Build page table.
1112:
1113: =back
1114:
1115: =cut
1116:
1117:
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