1: # The LearningOnline Network with CAPA
2: # Page Handler
3: #
4: # $Id: lonpage.pm,v 1.111.2.8 2019/08/12 15:36:40 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30:
31:
32:
33: package Apache::lonpage;
34:
35: use strict;
36: use Apache::Constants qw(:common :http);
37: use Apache::lonnet;
38: use Apache::loncommon();
39: use Apache::lonhtmlcommon;
40: use Apache::lonxml();
41: use Apache::lonlocal;
42: use Apache::lonmenu;
43: use Apache::lonhomework;
44: use Apache::lonenc();
45: use HTML::TokeParser;
46: use GDBM_File;
47: use Apache::lonsequence;
48: use lib '/home/httpd/lib/perl/';
49: use LONCAPA;
50:
51:
52: # -------------------------------------------------------------- Module Globals
53: my %hash;
54: my @rows;
55:
56: # ------------------------------------------------------------------ Euclid gcd
57:
58: sub euclid {
59: my ($e,$f)=@_;
60: my $a; my $b; my $r;
61: if ($e>$f) { $b=$e; $r=$f; } else { $r=$e; $b=$f; }
62: while ($r!=0) {
63: $a=$b; $b=$r;
64: $r=$a%$b;
65: }
66: return $b;
67: }
68:
69: # ------------------------------------------------------------ Build page table
70:
71: sub tracetable {
72: my ($sofar,$rid,$beenhere)=@_;
73: my $further=$sofar;
74: my $randomout=0;
75: unless ($env{'request.role.adv'}) {
76: $randomout = $hash{'randomout_'.$rid};
77: }
78: unless ($beenhere=~/\&$rid\&/) {
79: $beenhere.=$rid.'&';
80: unless ($randomout) {
81: if (defined($hash{'is_map_'.$rid})) {
82: if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&
83: (defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) {
84: my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};
85: $sofar=
86: &tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}},
87: '&'.$frid.$beenhere);
88: $sofar++;
89: if ($hash{'src_'.$frid}) {
90: my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$frid});
91: if (($brepriv eq '2') || ($brepriv eq 'F')) {
92: if (defined($rows[$sofar])) {
93: $rows[$sofar].='&'.$frid;
94: } else {
95: $rows[$sofar]=$frid;
96: }
97: }
98: }
99: }
100: } else {
101: $sofar++;
102: if ($hash{'src_'.$rid}) {
103: my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$rid});
104: if (($brepriv eq '2') || ($brepriv eq 'F')) {
105: if (defined($rows[$sofar])) {
106: $rows[$sofar].='&'.$rid;
107: } else {
108: $rows[$sofar]=$rid;
109: }
110: }
111: }
112: }
113: }
114:
115: if (defined($hash{'to_'.$rid})) {
116: my $mincond=1;
117: my $next='';
118: foreach (split(/\,/,$hash{'to_'.$rid})) {
119: my $thiscond=
120: &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}});
121: if ($thiscond>=$mincond) {
122: if ($next) {
123: $next.=','.$_.':'.$thiscond;
124: } else {
125: $next=$_.':'.$thiscond;
126: }
127: if ($thiscond>$mincond) { $mincond=$thiscond; }
128: }
129: }
130: foreach (split(/\,/,$next)) {
131: my ($linkid,$condval)=split(/\:/,$_);
132: if ($condval>=$mincond) {
133: my $now=&tracetable($sofar,$hash{'goesto_'.$linkid},$beenhere);
134: if ($now>$further) { $further=$now; }
135: }
136: }
137: }
138: }
139: return $further;
140: }
141:
142: # ================================================================ Main Handler
143:
144: sub handler {
145: my $r=shift;
146:
147: # ------------------------------------------- Set document type for header only
148:
149: if ($r->header_only) {
150: if ($env{'browser.mathml'}) {
151: &Apache::loncommon::content_type($r,'text/xml');
152: } else {
153: &Apache::loncommon::content_type($r,'text/html');
154: }
155: $r->send_http_header;
156: return OK;
157: }
158:
159: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
160: ['forceselect','launch']);
161: my $number_of_columns = 1;
162: my $requrl=$r->uri;
163: my $target = $env{'form.grade_target'};
164:
165: # Short term solution: define target as 'tex_answer' when retrieving answers
166: # for resources in a .page when generating printouts.
167: # A better long-term fix would be to modify the way problem rendering, and
168: # answer rendering are retrieved for individual resources when printing a .page,
169: # so rendered problem and answer are sequential for individual resources in
170: # the .page
171: #
172: if ($target eq 'answer') {
173: if ($env{'form.answer_output_mode'} eq 'tex') {
174: $target = 'tex_answer';
175: }
176: }
177: # &Apache::lonnet::logthis("Got a target of $target");
178: if ($target eq 'meta') {
179: &Apache::loncommon::content_type($r,'text/html');
180: $r->send_http_header;
181: return OK;
182: }
183: # ----------------------------------------------------------------- Tie db file
184: if (($env{'request.course.fn'}) && (!$env{'form.forceselect'})) {
185: my $fn=$env{'request.course.fn'};
186: if (-e "$fn.db") {
187: my %buttonshide;
188: my $hostname = $r->hostname();
189: if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) {
190: # ------------------------------------------------------------------- Hash tied
191: my $firstres=$hash{'map_start_'.$requrl};
192: my $lastres=$hash{'map_finish_'.$requrl};
193: if (($firstres) && ($lastres)) {
194: # ------------------------------------------------------------- Countdown Timer
195: my $now = time;
196: my ($pagefirstaccess,%hastimeleft,%countdowndisp);
197: my ($pagesymb,$courseid,$domain,$name)=&Apache::lonnet::whichuser();
198: if ($pagesymb && ($courseid ne '') && ($domain ne '') && ($name ne '')) {
199: my %times=&Apache::lonnet::get('firstaccesstimes',
200: [$courseid."\0".$pagesymb],
201: $domain,$name);
202: if ($times{$courseid."\0".$pagesymb} =~ /^\d+$/) {
203: $pagefirstaccess = $times{$courseid."\0".$pagesymb};
204: }
205: }
206: # ----------------------------------------------------------------- Render page
207:
208: @rows=();
209:
210: &tracetable(0,$firstres,'&');
211:
212: # ------------------------------------------------------------ Add to symb list
213:
214: my $i;
215: my %symbhash=();
216: for ($i=0;$i<=$#rows;$i++) {
217: if ($rows[$i]) {
218: my @colcont=split(/\&/,$rows[$i]);
219: foreach my $rid (@colcont) {
220: my ($mapid,$resid)=split(/\./,$rid);
221: $symbhash{$hash{'src_'.$rid}}=
222: [$hash{'src_'.$rid},$resid];
223: }
224: }
225: }
226: &Apache::lonnet::symblist($requrl,%symbhash);
227:
228: # ------------------------------------------------------------------ Page parms
229:
230: my $j;
231: my $lcm=1;
232: my $contents=0;
233: my $nforms=0;
234: my $nuploads=0;
235: my $ntimers=0;
236: my %turninpaths;
237: my %multiresps;
238: my $turninparent;
239:
240: my %ssibody=();
241: my %ssibgcolor=();
242: my %ssitext=();
243: my %ssilink=();
244: my %ssivlink=();
245: my %ssialink=();
246:
247: my %cellemb=();
248: my %cellexternal=();
249:
250: my $allscript='';
251: my $allmeta='';
252:
253: my $isxml=0;
254: my $xmlheader='';
255: my $xmlbody='';
256:
257: # --------------------------------------------- Get SSI output, post parameters
258:
259: for ($i=0;$i<=$#rows;$i++) {
260: if ($rows[$i]) {
261: $contents++;
262: my @colcont=split(/\&/,$rows[$i]);
263: $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1));
264: foreach (@colcont) {
265: my $src=$hash{'src_'.$_};
266: my $plainsrc = $src;
267: my ($extension)=($src=~/\.(\w+)$/);
268: $cellexternal{$_}=($hash{'ext_'.$_} eq 'true:');
269: if ($hash{'encrypted_'.$_}) {
270: $src=&Apache::lonenc::encrypted($src);
271: }
272: my ($mapid,$resid)=split(/\./,$_);
273: my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$src);
274: unless ($env{'request.role.adv'}) {
275: $buttonshide{$symb} = &Apache::lonnet::EXT("resource.0.buttonshide",$symb);
276: }
277: $cellemb{$_}=
278: &Apache::loncommon::fileembstyle($extension);
279: if ($cellexternal{$_}) {
280: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
281: $ssibody{$_} = <<ENDEXT;
282: <iframe src="$src" width="100%">No iframe support!</iframe>
283: ENDEXT
284: }
285: } elsif ($cellemb{$_} eq 'ssi') {
286: # --------------------------------------------------------- This is an SSI cell
287: my $prefix='p_'.$_.'_';
288: my $idprefix='p_'.join('_',($mapid,$resid,''));
289: my %posthash=('request.prefix' => $prefix,
290: 'LONCAPA_INTERNAL_no_discussion' => 'true',
291: 'symb' => $symb);
292: if (($env{'form.grade_target'} eq 'tex') ||
293: ($env{'form.answer_output_mode'} eq 'tex')) {
294: $posthash{'grade_target'}=$env{'form.grade_target'};
295: $posthash{'textwidth'}=$env{'form.textwidth'};
296: $posthash{'problem_split'}=$env{'form.problem_split'};
297: $posthash{'latex_type'}=$env{'form.latex_type'};
298: $posthash{'rndseed'}=$env{'form.rndseed'};
299: $posthash{'answer_output_mode'} = $env{'form.answer_output_mode'};
300: }
301: my $submitted=$env{'form.all_submit_pressed'};
302: if (!$submitted) {
303: foreach my $key (keys(%env)) {
304: if ($key=~/^\Qform.$prefix\Esubmit_(.+)_pressed$/) {
305: if ($env{$key}) {
306: $submitted=1;
307: last;
308: }
309: }
310: }
311: }
312: if ($submitted) {
313: foreach my $key (keys(%env)) {
314: if ($key=~/^\Qform.$prefix\E/) {
315: my $name=$key;
316: $name=~s/^\Qform.$prefix\E//;
317: $posthash{$name}=$env{$key};
318: }
319: }
320: if ($env{'form.all_submit_pressed'}) {
321: $posthash{'all_submit'}='yes';
322: }
323: }
324: if ($env{'environment.remote'} eq 'on') {
325: $posthash{'inhibitmenu'} = 'yes';
326: }
327: my $output=Apache::lonnet::ssi($src,%posthash);
328: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
329: if (($target eq 'tex') || ($target eq 'tex_answer')) {
330: $output =~ s/^([^&]+)\\begin\{document}//;
331: $output =~ s/\\end\{document}//;
332: # $output = '\parbox{\minipagewidth}{ '.$output.' }';
333: #some additional cleanup necessary for LateX (due to limitations of table environment
334: $output =~ s/(\\vskip\s*\d+mm)\s*(\\\\)+/$1/g;
335: }
336: my $matheditor;
337: if ($output =~ /\Qjavascript:LC_mathedit_HWVAL_\E/) {
338: $matheditor = 'dragmath';
339: } elsif ($output =~ /LCmathField/) {
340: $matheditor = 'lcmath';
341: }
342: my $parser=HTML::TokeParser->new(\$output);
343: my $token;
344: my $thisdir=$src;
345: my $bodydef=0;
346: my $thisxml=0;
347: my @rlinks=();
348: if ($output=~/\?xml/) {
349: $isxml=1;
350: $thisxml=1;
351: $output=~
352: /((?:\<(?:\?xml|\!DOC|html)[^\>]*(?:\>|\>\]\>)\s*)+)\<body[^\>]*\>/si;
353: $xmlheader=$1;
354: }
355: while ($token=$parser->get_token) {
356: if ($token->[0] eq 'S') {
357: if ($token->[1] eq 'a') {
358: if ($token->[2]->{'href'}) {
359: $rlinks[$#rlinks+1]=
360: $token->[2]->{'href'};
361: }
362: } elsif ($token->[1] eq 'img') {
363: $rlinks[$#rlinks+1]=
364: $token->[2]->{'src'};
365: } elsif ($token->[1] eq 'embed') {
366: $rlinks[$#rlinks+1]=
367: $token->[2]->{'src'};
368: } elsif ($token->[1] eq 'base') {
369: $thisdir=$token->[2]->{'href'};
370: } elsif ($token->[1] eq 'body') {
371: $bodydef=1;
372: $ssibgcolor{$_}=$token->[2]->{'bgcolor'};
373: $ssitext{$_}=$token->[2]->{'text'};
374: $ssilink{$_}=$token->[2]->{'link'};
375: $ssivlink{$_}=$token->[2]->{'vlink'};
376: $ssialink{$_}=$token->[2]->{'alink'};
377: if ($thisxml) {
378: $xmlbody=$token->[4];
379: }
380: } elsif ($token->[1] eq 'meta') {
381: if ($token->[4] !~ m:/>$:) {
382: $allmeta.="\n".$token->[4].'</meta>';
383: } else {
384: $allmeta.="\n".$token->[4];
385: }
386: } elsif (($token->[1] eq 'script') &&
387: ($bodydef==0)) {
388: $allscript.="\n\n"
389: .$parser->get_text('/script');
390: }
391: }
392: }
393: if ($output=~/\<body[^\>]*\>(.*)/si) {
394: $output=$1;
395: }
396: $output=~s/\<\/body\>.*//si;
397: if ($output=~/\<form/si) {
398: my $hastimer;
399: $nforms++;
400: $output=~s/\<form[^\>]*\>//gsi;
401: $output=~s/\<\/form[^\>]*\>//gsi;
402: if ($output=~/\<input[^\>]+name\s*=\s*[\'\"]*HWFILE/) {
403: $nuploads++;
404: }
405: if ($output=~/\<input[^\>]+name\s*=\s*[\'\"]*accessbutton/) {
406: $ntimers++;
407: $hastimer = 1;
408: }
409: $output=~
410: s/\<((?:input|select|button|textarea)[^\>]+)name\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 name="$prefix$2" $3\>/gsi;
411: $output=~
412: s/\<((?:input|select|button|textarea)[^\>]+)id\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 id="$idprefix$2" $3\>/gsi;
413: $output=~
414: s/(\Qthis.form.elements['\E)(HW(?:VAL|CHK)_[^']+\'\]\.(?:value=\'|checked))/$1$prefix$2/gsi;
415: if ($hastimer) {
416: $output=~
417: s/\<(input[^\>]+name=\Q"$prefix\Eaccessbutton"[^\>]+)(?:\Qdocument.markaccess.submit();\E)([^\>]*)\>/\<$1pageTimer(this.form,'$prefix')$2\>/gsi;
418: $output=~ s/\<(input[^\>]+name=\Q"$prefix\Emarkaccess"[^\>]+value=["'])(?:yes)(['"][^\>]*)\>/\<$1$2\>/gsi;
419: }
420: if ($matheditor eq 'dragmath') {
421: $output=~
422: s/(\Qjavascript:LC_mathedit_\E)(HWVAL_)([^'"]+?)(\(['"]*)(\QHWVAL_\E\3['"]\)\;void\(0\)\;)/$1$idprefix$2$3$4$idprefix$5/g;
423: $output=~
424: s/(function\s+LC_mathedit_)(HWVAL_)([^'"]+?)(\s+\(LCtextline\))/$1$idprefix$2$3$4/g;
425: } elsif ($matheditor eq 'lcmath') {
426: $output=~
427: s/(var\s+LCmathField\s+=\s+document\.getElementById\(['"])([^'"]+?)(['"]\)\;)/$1$idprefix$2$3/g;
428: }
429: $output=~
430: s/(\Q<div id="msg_\E)(\Qsubmit_\E)([^"]*)(\Q" style="display:none">\E)/<input type="hidden" name="$prefix$2$3_pressed" id="$idprefix$2$3_pressed" value="" \/>$1$idprefix$2$3$4/g;
431: $output=~
432: s/(\Q<td class="LC_status_\E)(\Qsubmit_\E)([^\"]*)(\s*[^\"]*"\>)/$1$idprefix$2$3$4/g;
433: if ($nuploads) {
434: ($turninpaths{$prefix},$multiresps{$prefix}) =
435: &Apache::loncommon::get_turnedin_filepath($symb,$env{'user.name'},$env{'user.domain'});
436: if ($turninparent eq '') {
437: $turninparent = $turninpaths{$prefix};
438: $turninparent =~ s{(/[^/]+)$}{};
439: }
440: }
441: $output=~
442: s/\<((?:input|select)[^\>]+\Qjavascript:setSubmittedPart\E)\(\s*[\'\"]([^\'\"]+)[\'\"]*\s*\)/\<$1('$2','$prefix')/gsi;
443: $output=~
444: s/\<(input[^\>]+\Qonfocus=\"javascript:disableAutoComplete\E)\(\'([^\']+)\'\)(;\")/\<$1('$idprefix$2')$3/gsi;
445: unless ($hastimer) {
446: if ($plainsrc =~ /$LONCAPA::assess_re/) {
447: %Apache::lonhomework::history =
448: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
449: my $type = 'problem';
450: if ($extension eq 'task') {
451: $type = 'Task';
452: }
453: my ($status,$accessmsg,$slot_name,$slot) =
454: &Apache::lonhomework::check_slot_access('0',$type,$symb);
455: undef(%Apache::lonhomework::history);
456: my $probstatus = &Apache::lonnet::EXT("resource.0.problemstatus",$symb);
457: if (($status eq 'CAN_ANSWER') || (($status eq 'CANNOT_ANSWER') &&
458: (($probstatus eq 'no') || ($probstatus eq 'no_feedback_ever')))) {
459: my ($slothastime,$timerhastime);
460: if ($slot_name ne '') {
461: if (ref($slot) eq 'HASH') {
462: if (($slot->{'starttime'} < $now) &&
463: ($slot->{'endtime'} > $now)) {
464: $slothastime = $now - $slot->{'endtime'};
465: }
466: }
467: }
468: my $duedate = &Apache::lonnet::EXT("resource.0.duedate",$symb);
469: my @interval=&Apache::lonnet::EXT("resource.0.interval",$symb);
470: if (@interval > 1) {
471: my $first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
472: if ($first_access > 0) {
473: my $timeremains = $first_access+$interval[0] - $now;
474: if ($timeremains > 0) {
475: $timerhastime = $timeremains;
476: }
477: }
478: }
479: if (($duedate && $duedate > $now) ||
480: (!$duedate && $timerhastime > 0) ||
481: ($slot_name ne '' && $slothastime)) {
482: if ((@interval > 1 && $timerhastime) ||
483: ($type eq 'Task' && $slothastime)) {
484: $countdowndisp{$symb} = 'inline';
485: if ((@interval > 1) && ($timerhastime)) {
486: $hastimeleft{$symb} = $timerhastime;
487: } else {
488: $hastimeleft{$symb} = $slothastime;
489: }
490: } else {
491: $hastimeleft{$symb} = $duedate - $now;
492: $countdowndisp{$symb} = 'none';
493: }
494: }
495: }
496: }
497: }
498: }
499: $thisdir=~s/\/[^\/]*$//;
500: foreach (@rlinks) {
501: unless (($_=~/^https?\:\/\//i) ||
502: ($_=~/^\//) ||
503: ($_=~/^javascript:/i) ||
504: ($_=~/^mailto:/i) ||
505: ($_=~/^\#/)) {
506: my $newlocation=
507: &Apache::lonnet::hreflocation($thisdir,$_);
508: $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
509: }
510: }
511: # -------------------------------------------------- Deal with Applet codebases
512: $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
513: $ssibody{$_}=$output;
514: # ---------------------------------------------------------------- End SSI cell
515: }
516: }
517: }
518: }
519: unless ($contents) {
520: &Apache::loncommon::content_type($r,'text/html');
521: $r->send_http_header;
522: $r->print(&Apache::loncommon::start_page(undef,undef,
523: {'force_register' => 1}));
524: $r->print(&mt('This page is either empty or it only contains resources that are currently hidden').'. ');
525: $r->print('<br /><br />'.&mt('Please use the LON-CAPA navigation arrows to move to another item in the course').
526: &Apache::loncommon::end_page());
527: } else {
528: # ------------------------------------------------------------------ Build page
529:
530: # ---------------------------------------------------------------- Send headers
531: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
532: if ($isxml) {
533: &Apache::loncommon::content_type($r,'text/xml');
534: } else {
535: &Apache::loncommon::content_type($r,'text/html');
536: }
537: $r->send_http_header;
538: # ------------------------------------------------------------------------ Head
539: if ($allscript) {
540: $allscript =
541: "\n".'<script type="text/javascript">'."\n".
542: $allscript.
543: "\n</script>\n";
544: }
545: if (($nforms) && ($nuploads)) {
546: $allscript .= &Apache::lonhtmlcommon::file_submissionchk_js(\%turninpaths,\%multiresps).
547: '<script type="text/javascript" '.
548: 'src="/res/adm/includes/file_upload.js"></script>';
549: }
550: if (($nforms) && (&Apache::lonhtmlcommon::htmlareabrowser())) {
551: my %textarea_args = (
552: dragmath => 'math',
553: );
554: $allscript .= &Apache::lonhtmlcommon::htmlareaselectactive(\%textarea_args);
555: }
556: if ($ntimers) {
557: $allscript .= '<script type="text/javascript">'."\n".
558: '// <![CDATA['."\n".
559: 'function pageTimer(form,prefix) {'."\n".
560: " form.elements[prefix+'markaccess'].value = 'yes';\n".
561: " form.submit();\n".
562: '}'."\n".
563: '// ]]>'.
564: "\n</script>\n";
565: }
566: if (keys(%hastimeleft)) {
567: my (%uniquetimes,%uniquedisplays);
568: foreach my $item (values(%hastimeleft)) {
569: if (exists($uniquetimes{$item})) {
570: $uniquetimes{$item} ++;
571: } else {
572: $uniquetimes{$item} = 1;
573: }
574: }
575: if (keys(%uniquetimes) == 1) {
576: my (%uniquedisplays,%uniquedones,$currdisp);
577: if (keys(%countdowndisp)) {
578: foreach my $item (values(%countdowndisp)) {
579: if (exists($uniquedisplays{$item})) {
580: $uniquedisplays{$item} ++;
581: } else {
582: $uniquedisplays{$item} = 1;
583: }
584: }
585: my @countdowndisplay = keys(%uniquedisplays);
586: if (scalar(@countdowndisplay) == 1) {
587: $currdisp = $countdowndisplay[0];
588: }
589: }
590: &add_countdown_timer($currdisp);
591: }
592: }
593: my $pagebuttonshide;
594: if (keys(%buttonshide)) {
595: my %uniquebuttonhide;
596: foreach my $item (values(%buttonshide)) {
597: if (exists($uniquebuttonhide{$item})) {
598: $uniquebuttonhide{$item} ++;
599: } else {
600: $uniquebuttonhide{$item} = 1;
601: }
602: }
603: if (keys(%uniquebuttonhide) == 1) {
604: if (lc((keys(%uniquebuttonhide))[0]) eq 'yes') {
605: $pagebuttonshide = 'yes';
606: }
607: }
608: }
609: # ------------------------------------------------------------------ Start body
610: $r->print(&Apache::loncommon::start_page(undef,$allscript,
611: {'force_register' => 1,
612: 'bgcolor' => '#ffffff',
613: 'hide_buttons' => $pagebuttonshide}));
614: # ------------------------------------------------------------------ Start form
615: if ($nforms) {
616: my $fmtag = '<form name="lonhomework" method="post" enctype="multipart/form-data"';
617: if ($nuploads) {
618: my $multi;
619: if ($nuploads > 1) {
620: $multi = 1;
621: }
622: $fmtag .= 'onsubmit="return file_submission_check(this,'."'$turninparent','$multi'".');"';
623: }
624: $fmtag .= ' action="'.
625: &Apache::lonenc::check_encrypt($requrl)
626: .'" id="LC_page">';
627: $r->print($fmtag);
628: }
629: } elsif (($target eq 'tex') || ($target eq 'tex_answer')) {
630: # I think this is not needed as the header
631: # will be put in for each of the page parts
632: # by the londefdef.pm now that we are opening up
633: # the parts of a page.
634: #$r->print('\documentclass{article}
635: # \newcommand{\keephidden}[1]{}
636: # \usepackage[dvips]{graphicx}
637: # \usepackage{epsfig}
638: # \usepackage{calc}
639: # \usepackage{longtable}
640: # \begin{document}');
641: }
642: # ----------------------------------------------------------------- Start table
643: if (($target eq 'tex') || ($target eq 'tex_answer')) {
644: # # $r->print('\begin{longtable}INSERTTHEHEADOFLONGTABLE\endfirsthead\endhead ');
645: if ($number_of_columns le $lcm) {$number_of_columns=$lcm;};
646: } else {
647: $r->print('<table width="100%" cols="'.$lcm.'" border="0">');
648: }
649: # generate rows
650: for ($i=0;$i<=$#rows;$i++) {
651: if ($rows[$i]) {
652: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
653: $r->print("\n<tr>");
654: }
655: my @colcont=split(/\&/,$rows[$i]);
656: my $avespan=$lcm/($#colcont+1);
657: for ($j=0;$j<=$#colcont;$j++) {
658: my $rid=$colcont[$j];
659: my $metainfo =&get_buttons(\%hash,$rid,\%buttonshide,$hostname).'<br />';
660: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
661: $r->print('<td colspan="'.$avespan.'"');
662: }
663: if (($cellemb{$rid} eq 'ssi') || ($cellexternal{$rid})) {
664: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
665: if ($ssibgcolor{$rid}) {
666: $r->print(' bgcolor="'.
667: $ssibgcolor{$rid}.'"');
668: }
669: $r->print('>'.$metainfo.'<font');
670:
671: if ($ssitext{$rid}) {
672: $r->print(' text="'.$ssitext{$rid}.'"');
673: }
674: if ($ssilink{$rid}) {
675: $r->print(' link="'.$ssilink{$rid}.'"');
676: }
677: if ($ssitext{$rid}) {
678: $r->print(' vlink="'.$ssivlink{$rid}.'"');
679: }
680: if ($ssialink{$rid}) {
681: $r->print(' alink="'.$ssialink{$rid}.'"');
682: }
683: $r->print('>');
684: }
685: unless (($cellexternal{$rid}) &&
686: ($target eq 'tex') && ($target eq 'tex_answer')) {
687: $r->print($ssibody{$rid});
688: }
689: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
690: $r->print('</font>');
691: }
692: if ($env{'course.'.
693: $env{'request.course.id'}.
694: '.pageseparators'} eq 'yes') {
695: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
696: $r->print('<hr />');
697: }
698: }
699: } elsif ($cellemb{$rid} eq 'img') {
700: $r->print('>'.$metainfo.'<img src="'.
701: $hash{'src_'.$rid}.'" />');
702: } elsif ($cellemb{$rid} eq 'emb') {
703: $r->print('>'.$metainfo.'<embed src="'.
704: $hash{'src_'.$rid}.'"></embed>');
705: } elsif (&Apache::lonnet::declutter($hash{'src_'.$rid}) !~/\.(sequence|page)$/) {
706: $r->print($metainfo.'<b>'.$hash{'title_'.$rid}.'</b><br />');
707: unless ($cellemb{$rid} eq 'wrp') {
708: $r->print(&mt('It is recommended that you use an up-to-date virus scanner before handling this file.'));
709: }
710: $r->print('</p><p><table>'.
711: &Apache::londocs::entryline(0,
712: &mt("Click to download or use your browser's Save Link function"),
713: '/'.&Apache::lonnet::declutter($hash{'src_'.$rid})).
714: '</table></p><br />');
715: }
716: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
717: $r->print('</td>');
718: } else {
719: # for (my $incol=1;$incol<=$avespan;$incol++) {
720: # $r->print(' & ');
721: # }
722: }
723: }
724: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
725: $r->print('</tr>');
726: } else {
727: # $r->print('REMOVETHEHEADOFLONGTABLE\\\\');
728: }
729: }
730: }
731: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
732: $r->print("\n</table>");
733: } else {
734: # $r->print('\end{longtable}\strut');
735: }
736: # ---------------------------------------------------------------- Submit, etc.
737: if ($nforms) {
738: my $class;
739: if ($nforms > 1) {
740: $class = ' class="LC_hwk_submit"';
741: if ($ntimers) {
742: $nforms = 1;
743: $class = '';
744: }
745: }
746: $r->print(
747: '<input name="all_submit" value="'.&mt('Submit All').'" type="'.
748: (($nforms>1)?'submit':'hidden').'"'.$class.' id="all_submit" />'.
749: '<input type="hidden" name="all_submit_pressed" '.
750: 'id="all_submit_pressed" value="" />'.
751: '<div id="msg_all_submit" style="display:none">'.
752: &mt('Processing your submission ...').'</div></form>');
753: }
754: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
755: $r->print(&Apache::loncommon::end_page({'discussion'
756: => 1,}));
757: } else {
758: $r->print('\end{document}'.$number_of_columns);
759: }
760: &Apache::lonnet::symblist($requrl,%symbhash);
761: my ($map,$id,$url)=&Apache::lonnet::decode_symb(&Apache::lonnet::symbread());
762: &Apache::lonnet::symblist($map,'last_known'=>[$url,$id]);
763: # -------------------------------------------------------------------- End page
764: }
765: # ------------------------------------------------------------- End render page
766: } else {
767: &Apache::loncommon::content_type($r,'text/html');
768: $r->send_http_header;
769: &Apache::lonsequence::viewmap($r,$requrl);
770: }
771: # ------------------------------------------------------------------ Untie hash
772: unless (untie(%hash)) {
773: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
774: "Could not untie coursemap $fn (browse).</font>");
775: }
776: # -------------------------------------------------------------------- All done
777: return OK;
778: # ----------------------------------------------- Errors, hash could no be tied
779: }
780: }
781: }
782: &Apache::loncommon::content_type($r,'text/html');
783: $r->send_http_header;
784: &Apache::lonsequence::viewmap($r,$requrl);
785: return OK;
786: }
787:
788: sub get_buttons {
789: my ($hash,$rid,$buttonshide,$hostname) = @_;
790:
791: my $metainfo = '';
792: my $esrc=&Apache::lonnet::declutter($hash->{'src_'.$rid});
793: my ($mapid,$resid)=split(/\./,$rid);
794: my $symb=&Apache::lonnet::encode_symb($hash->{'map_id_'.$mapid},
795: $resid,
796: $hash->{'src_'.$rid});
797: unless ($env{'request.role.adv'}) {
798: if ($buttonshide->{$symb} eq 'yes') {
799: return;
800: }
801: }
802: if ($hash->{'encrypted_'.$rid}) {
803: $symb=&Apache::lonenc::encrypted($symb);
804: $esrc=&Apache::lonenc::encrypted($esrc);
805: }
806: if ($hash->{'src_'.$rid} !~ m-^/uploaded/-
807: && $hash->{'src_'.$rid} !~ m{^https?://}
808: && !$env{'request.enc'}
809: && ($env{'request.role.adv'}
810: || !$hash->{'encrypted_'.$rid})) {
811: $metainfo .='<a name="'.&escape($symb).'" />'.
812: '<a href="'.$hash->{'src_'.$rid}.'.meta'.'" target="LONcatInfo">'.
813: '<img src="/res/adm/pages/catalog.png" class="LC_icon"'.
814: ' alt="'.&mt('Show Metadata').'"'.
815: ' title="'.&mt('Show Metadata').'" />'.
816: '</a>';
817: }
818: if (($hash->{'src_'.$rid} !~ m{^/uploaded/}) &&
819: ($hash->{'src_'.$rid} !~ m{^https?://})) {
820: $metainfo .= '<a href="/adm/evaluate?postdata='.
821: &escape($esrc).
822: '" target="LONcatInfo">'.
823: '<img src="/res/adm/pages/eval.png" class="LC_icon"'.
824: ' alt="'.&mt('Provide my evaluation of this resource').'"'.
825: ' title="'.&mt('Provide my evaluation of this resource').'" />'.
826: '</a>';
827: }
828: if (($hash->{'src_'.$rid}=~/$LONCAPA::assess_re/) &&
829: ($hash->{'src_'.$rid} !~ m-^/uploaded/-)) {
830:
831: if (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {
832: $metainfo.=
833: '<a href="/adm/grades?symb='.&escape($symb).
834: # '&command=submission" target="LONcatInfo">'.
835: '&command=submission">'.
836: '<img src="/adm/lonMisc/subm_button.png" class="LC_icon"'.
837: ' alt="'.&mt('View Submissions for a Student or a Group of Students').'"'.
838: ' title="'.&mt('View Submissions for a Student or a Group of Students').'" />'.
839: '</a>'.
840: '<a href="/adm/grades?symb='.&escape($symb).
841: # '&command=gradingmenu" target="LONcatInfo">'.
842: '&command=gradingmenu">'.
843: '<img src="/res/adm/pages/pgrd.png" class="LC_icon"'.
844: ' alt="'.&mt('Content Grades').'"'.
845: ' title="'.&mt('Content Grades').'" />'.
846: '</a>';
847: }
848: if (&Apache::lonnet::allowed('opa',$env{'request.course.id'})) {
849: $metainfo.=
850: '<a href="/adm/parmset?symb='.&escape($symb).
851: # '" target="LONcatInfo">'.
852: '" >'.
853: '<img src="/adm/lonMisc/pprm_button.png" class="LC_icon"'.
854: ' alt="'.&mt('Content Settings').'"'.
855: ' title="'.&mt('Content Settings').'" />'.
856: '</a>';
857: }
858: }
859: if ($env{'request.course.id'}) {
860: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
861: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
862: my $file=&Apache::lonnet::declutter($hash->{'src_'.$rid});
863: my $editbutton = '';
864: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
865: my ($cfile,$home,$switchserver,$forceedit,$forceview) =
866: &Apache::lonnet::can_edit_resource($file,$cnum,$cdom,$hash->{'src_'.$rid},$symb);
867: if ($cfile ne '') {
868: my $jscall = &Apache::lonhtmlcommon::jump_to_editres($cfile,$home,$switchserver,
869: $forceedit,1,$symb,undef,
870: &escape($env{'form.title'},
871: $hostname));
872: if ($jscall) {
873: $editbutton = 1;
874: my $icon = 'pcstr.png';
875: my $label = &mt('Edit');
876: my $title = &mt('Edit this resource');
877: my $pic = '<img src="'.&Apache::loncommon::lonhttpdurl('/res/adm/pages/'.$icon).'"'.
878: ' class="LC_icon" alt="'.$label.'" title="'.$title.'" />';
879: $metainfo .= ' <a href="javascript:'.$jscall.';">'.$pic.'</a>';
880: }
881: }
882: }
883: if ((!$editbutton) && ($file=~/$LONCAPA::assess_re/)) {
884: my $url = &Apache::lonnet::clutter($file);
885: my $viewsrcbutton;
886: if ((&Apache::lonnet::allowed('cre','/')) &&
887: (&Apache::lonnet::metadata($url,'sourceavail') eq 'open')) {
888: $viewsrcbutton = 1;
889: } elsif (&Apache::lonnet::allowed('vxc',$env{'request.course.id'})) {
890: if ($url =~ m{^\Q/res/$cdom/\E($LONCAPA::match_username)/}) {
891: my $auname = $1;
892: if (($env{'request.course.adhocsrcaccess'} ne '') &&
893: (grep(/^\Q$auname\E$/,split(/,/,$env{'request.course.adhocsrcaccess'})))) {
894: $viewsrcbutton = 1;
895: }
896: }
897: }
898: if ($viewsrcbutton) {
899: my $icon = 'pcstr.png';
900: my $label = &mt('View Source');
901: my $title = &mt('View source code');
902: my $jsrid = $rid;
903: $jsrid =~ s/\./_/g;
904: my $showurl = &escape(&Apache::lonenc::check_encrypt($url));
905: my $pic = '<img src="'.&Apache::loncommon::lonhttpdurl('/res/adm/pages/'.$icon).'"'.
906: ' class="LC_icon" alt="'.$label.'" title="'.$title.'" />';
907: $metainfo .= ' <a href="javascript:open_source_'.$jsrid.'();">'.$pic.'</a>'."\n".
908: '<script type="text/javascript">'."\n".
909: "function open_source_$jsrid() {\n".
910: " sourcewin=window.open('/adm/source?inhibitmenu=yes&viewonly=1&filename=$showurl','LONsource',".
911: "'height=500,width=600,resizable=yes,location=no,menubar=no,toolbar=no,scrollbars=yes');\n".
912: "}\n".
913: "</script>\n";
914: }
915: }
916: }
917: return $metainfo;
918: }
919:
920: sub add_countdown_timer {
921: my ($currdisp) = @_;
922: my ($collapse,$expand,$alttxt,$title);
923: if ($currdisp eq 'inline') {
924: $collapse = '► ';
925: } else {
926: $expand = '◄ ';
927: }
928: unless ($env{'environment.icons'} eq 'iconsonly') {
929: $alttxt = &mt('Timer');
930: $title = $alttxt.' ';
931: }
932: my $desc = &mt('Countdown to due date/time');
933: my $output = <<END;
934: <a href="javascript:toggleCountdown();" class="LC_menubuttons_link">
935: <span id="ddcountcollapse" class="LC_menubuttons_inline_text">
936: $collapse
937: </span></a>
938: <span id="duedatecountdown" class="LC_menubuttons_inline_text" style="display: $currdisp;"></span>
939: <a href="javascript:toggleCountdown();" class="LC_menubuttons_link">
940: <span id="ddcountexpand" class="LC_menubuttons_inline_text" >$expand</span>
941: <img src="/res/adm/pages/timer.png" title="$desc" class="LC_icon" alt="$alttxt" /><span class="LC_menubuttons_inline_text">$title</span></a>
942: END
943: &Apache::lonhtmlcommon::clear_breadcrumb_tools();
944: &Apache::lonhtmlcommon::add_breadcrumb_tool('tools',$output);
945: return;
946: }
947:
948:
949: 1;
950: __END__
951:
952:
953: =head1 NAME
954:
955: Apache::lonpage - Page Handler
956:
957: =head1 SYNOPSIS
958:
959: Invoked by /etc/httpd/conf/srm.conf:
960:
961: <LocationMatch "^/res/.*\.page$>
962: SetHandler perl-script
963: PerlHandler Apache::lonpage
964: </LocationMatch>
965:
966: =head1 INTRODUCTION
967:
968: This module renders a .page resource.
969:
970: This is part of the LearningOnline Network with CAPA project
971: described at http://www.lon-capa.org.
972:
973: =head1 HANDLER SUBROUTINE
974:
975: This routine is called by Apache and mod_perl.
976:
977: =over 4
978:
979: =item *
980:
981: set document type for header only
982:
983: =item *
984:
985: tie db file
986:
987: =item *
988:
989: render page
990:
991: =item *
992:
993: add to symb list
994:
995: =item *
996:
997: page parms
998:
999: =item *
1000:
1001: Get SSI output, post parameters
1002:
1003: =item *
1004:
1005: SSI cell rendering
1006:
1007: =item *
1008:
1009: Deal with Applet codebases
1010:
1011: =item *
1012:
1013: Build page
1014:
1015: =item *
1016:
1017: send headers
1018:
1019: =item *
1020:
1021: start body
1022:
1023: =item *
1024:
1025: start form
1026:
1027: =item *
1028:
1029: start table
1030:
1031: =item *
1032:
1033: submit element, etc, render page, untie hash
1034:
1035: =back
1036:
1037: =head1 OTHER SUBROUTINES
1038:
1039: =over 4
1040:
1041: =item *
1042:
1043: euclid() : Euclid's method for determining the greatest common denominator.
1044:
1045: =item *
1046:
1047: tracetable() : Build page table.
1048:
1049: =back
1050:
1051: =cut
1052:
1053:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonpage.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / rat