1: # The LearningOnline Network with CAPA
2: # Page Handler
3: #
4: # $Id: lonpage.pm,v 1.102 2013/06/10 03:12:24 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 HTML::TokeParser;
44: use GDBM_File;
45: use Apache::lonsequence;
46: use lib '/home/httpd/lib/perl/';
47: use LONCAPA;
48:
49:
50: # -------------------------------------------------------------- Module Globals
51: my %hash;
52: my @rows;
53:
54: # ------------------------------------------------------------------ Euclid gcd
55:
56: sub euclid {
57: my ($e,$f)=@_;
58: my $a; my $b; my $r;
59: if ($e>$f) { $b=$e; $r=$f; } else { $r=$e; $b=$f; }
60: while ($r!=0) {
61: $a=$b; $b=$r;
62: $r=$a%$b;
63: }
64: return $b;
65: }
66:
67: # ------------------------------------------------------------ Build page table
68:
69: sub tracetable {
70: my ($sofar,$rid,$beenhere)=@_;
71: my $further=$sofar;
72: my $randomout=0;
73: unless ($env{'request.role.adv'}) {
74: $randomout = $hash{'randomout_'.$rid};
75: }
76: unless ($beenhere=~/\&$rid\&/) {
77: $beenhere.=$rid.'&';
78: unless ($randomout) {
79: if (defined($hash{'is_map_'.$rid})) {
80: if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&
81: (defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) {
82: my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};
83: $sofar=
84: &tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}},
85: '&'.$frid.$beenhere);
86: $sofar++;
87: if ($hash{'src_'.$frid}) {
88: my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$frid});
89: if (($brepriv eq '2') || ($brepriv eq 'F')) {
90: if (defined($rows[$sofar])) {
91: $rows[$sofar].='&'.$frid;
92: } else {
93: $rows[$sofar]=$frid;
94: }
95: }
96: }
97: }
98: } else {
99: $sofar++;
100: if ($hash{'src_'.$rid}) {
101: my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$rid});
102: if (($brepriv eq '2') || ($brepriv eq 'F')) {
103: if (defined($rows[$sofar])) {
104: $rows[$sofar].='&'.$rid;
105: } else {
106: $rows[$sofar]=$rid;
107: }
108: }
109: }
110: }
111: }
112:
113: if (defined($hash{'to_'.$rid})) {
114: my $mincond=1;
115: my $next='';
116: foreach (split(/\,/,$hash{'to_'.$rid})) {
117: my $thiscond=
118: &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}});
119: if ($thiscond>=$mincond) {
120: if ($next) {
121: $next.=','.$_.':'.$thiscond;
122: } else {
123: $next=$_.':'.$thiscond;
124: }
125: if ($thiscond>$mincond) { $mincond=$thiscond; }
126: }
127: }
128: foreach (split(/\,/,$next)) {
129: my ($linkid,$condval)=split(/\:/,$_);
130: if ($condval>=$mincond) {
131: my $now=&tracetable($sofar,$hash{'goesto_'.$linkid},$beenhere);
132: if ($now>$further) { $further=$now; }
133: }
134: }
135: }
136: }
137: return $further;
138: }
139:
140: # ================================================================ Main Handler
141:
142: sub handler {
143: my $r=shift;
144:
145: # ------------------------------------------- Set document type for header only
146:
147: if ($r->header_only) {
148: if ($env{'browser.mathml'}) {
149: &Apache::loncommon::content_type($r,'text/xml');
150: } else {
151: &Apache::loncommon::content_type($r,'text/html');
152: }
153: $r->send_http_header;
154: return OK;
155: }
156:
157: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
158: ['forceselect','launch']);
159: my $number_of_columns = 1;
160: my $requrl=$r->uri;
161: my $target = $env{'form.grade_target'};
162:
163: # Short term solution: define target as 'tex_answer' when retrieving answers
164: # for resources in a .page when generating printouts.
165: # A better long-term fix would be to modify the way problem rendering, and
166: # answer rendering are retrieved for individual resources when printing a .page,
167: # so rendered problem and answer are sequential for individual resources in
168: # the .page
169: #
170: if ($target eq 'answer') {
171: if ($env{'form.answer_output_mode'} eq 'tex') {
172: $target = 'tex_answer';
173: }
174: }
175: # &Apache::lonnet::logthis("Got a target of $target");
176: if ($target eq 'meta') {
177: &Apache::loncommon::content_type($r,'text/html');
178: $r->send_http_header;
179: return OK;
180: }
181: # ----------------------------------------------------------------- Tie db file
182: if (($env{'request.course.fn'}) && (!$env{'form.forceselect'})) {
183: my $fn=$env{'request.course.fn'};
184: if (-e "$fn.db") {
185: if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) {
186: # ------------------------------------------------------------------- Hash tied
187: my $firstres=$hash{'map_start_'.$requrl};
188: my $lastres=$hash{'map_finish_'.$requrl};
189: if (($firstres) && ($lastres)) {
190: # ----------------------------------------------------------------- Render page
191:
192: @rows=();
193:
194: &tracetable(0,$firstres,'&');
195:
196: # ------------------------------------------------------------ Add to symb list
197:
198: my $i;
199: my %symbhash=();
200: for ($i=0;$i<=$#rows;$i++) {
201: if ($rows[$i]) {
202: my @colcont=split(/\&/,$rows[$i]);
203: foreach my $rid (@colcont) {
204: my ($mapid,$resid)=split(/\./,$rid);
205: $symbhash{$hash{'src_'.$rid}}=
206: [$hash{'src_'.$rid},$resid];
207: }
208: }
209: }
210: &Apache::lonnet::symblist($requrl,%symbhash);
211:
212: # ------------------------------------------------------------------ Page parms
213:
214: my $j;
215: my $lcm=1;
216: my $contents=0;
217: my $nforms=0;
218: my $nuploads=0;
219: my %turninpaths;
220: my %multiresps;
221: my $turninparent;
222:
223: my %ssibody=();
224: my %ssibgcolor=();
225: my %ssitext=();
226: my %ssilink=();
227: my %ssivlink=();
228: my %ssialink=();
229:
230: my %cellemb=();
231: my %cellexternal=();
232:
233: my $allscript='';
234: my $allmeta='';
235:
236: my $isxml=0;
237: my $xmlheader='';
238: my $xmlbody='';
239:
240: # --------------------------------------------- Get SSI output, post parameters
241:
242: for ($i=0;$i<=$#rows;$i++) {
243: if ($rows[$i]) {
244: $contents++;
245: my @colcont=split(/\&/,$rows[$i]);
246: $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1));
247: foreach (@colcont) {
248: my $src=$hash{'src_'.$_};
249: my ($extension)=($src=~/\.(\w+)$/);
250: $cellexternal{$_}=($hash{'ext_'.$_} eq 'true:');
251: if ($hash{'encrypted_'.$_}) {
252: $src=&Apache::lonenc::encrypted($src);
253: }
254: $cellemb{$_}=
255: &Apache::loncommon::fileembstyle($extension);
256: if ($cellexternal{$_}) {
257: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
258: $ssibody{$_} = <<ENDEXT;
259: <iframe src="$src" width="100%">No iframe support!</iframe>
260: ENDEXT
261: }
262: } elsif ($cellemb{$_} eq 'ssi') {
263: # --------------------------------------------------------- This is an SSI cell
264: my ($mapid,$resid)=split(/\./,$_);
265: my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$src);
266:
267: my $prefix=$_.'_';
268: my $idprefix= join('_',($mapid,$resid,''));
269: my %posthash=('request.prefix' => $prefix,
270: 'LONCAPA_INTERNAL_no_discussion' => 'true',
271: 'symb' => $symb);
272: if (($env{'form.grade_target'} eq 'tex') ||
273: ($env{'form.answer_output_mode'} eq 'tex')) {
274: $posthash{'grade_target'}=$env{'form.grade_target'};
275: $posthash{'textwidth'}=$env{'form.textwidth'};
276: $posthash{'problem_split'}=$env{'form.problem_split'};
277: $posthash{'latex_type'}=$env{'form.latex_type'};
278: $posthash{'rndseed'}=$env{'form.rndseed'};
279: $posthash{'answer_output_mode'} = $env{'form.answer_output_mode'};
280: }
281: my $submitted=exists($env{'form.all_submit'});
282: if (!$submitted) {
283: foreach my $key (keys(%env)) {
284: if ($key=~/^form.\Q$prefix\Esubmit_/) {
285: $submitted=1;last;
286: }
287: }
288: }
289: if ($submitted) {
290: foreach my $key (keys(%env)) {
291: if ($key=~/^form.\Q$prefix\E/) {
292: my $name=$key;
293: $name=~s/^form.\Q$prefix\E//;
294: $posthash{$name}=$env{$key};
295: }
296: }
297: if (exists($env{'form.all_submit'})) {
298: $posthash{'all_submit'}='yes';
299: }
300: }
301: my $output=Apache::lonnet::ssi($src,%posthash);
302: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
303: if (($target eq 'tex') || ($target eq 'tex_answer')) {
304: $output =~ s/^([^&]+)\\begin{document}//;
305: $output =~ s/\\end{document}//;
306: # $output = '\parbox{\minipagewidth}{ '.$output.' }';
307: #some additional cleanup necessary for LateX (due to limitations of table environment
308: $output =~ s/(\\vskip\s*\d+mm)\s*(\\\\)+/$1/g;
309: }
310: my $parser=HTML::TokeParser->new(\$output);
311: my $token;
312: my $thisdir=$src;
313: my $bodydef=0;
314: my $thisxml=0;
315: my @rlinks=();
316: if ($output=~/\?xml/) {
317: $isxml=1;
318: $thisxml=1;
319: $output=~
320: /((?:\<(?:\?xml|\!DOC|html)[^\>]*(?:\>|\>\]\>)\s*)+)\<body[^\>]*\>/si;
321: $xmlheader=$1;
322: }
323: while ($token=$parser->get_token) {
324: if ($token->[0] eq 'S') {
325: if ($token->[1] eq 'a') {
326: if ($token->[2]->{'href'}) {
327: $rlinks[$#rlinks+1]=
328: $token->[2]->{'href'};
329: }
330: } elsif ($token->[1] eq 'img') {
331: $rlinks[$#rlinks+1]=
332: $token->[2]->{'src'};
333: } elsif ($token->[1] eq 'embed') {
334: $rlinks[$#rlinks+1]=
335: $token->[2]->{'src'};
336: } elsif ($token->[1] eq 'base') {
337: $thisdir=$token->[2]->{'href'};
338: } elsif ($token->[1] eq 'body') {
339: $bodydef=1;
340: $ssibgcolor{$_}=$token->[2]->{'bgcolor'};
341: $ssitext{$_}=$token->[2]->{'text'};
342: $ssilink{$_}=$token->[2]->{'link'};
343: $ssivlink{$_}=$token->[2]->{'vlink'};
344: $ssialink{$_}=$token->[2]->{'alink'};
345: if ($thisxml) {
346: $xmlbody=$token->[4];
347: }
348: } elsif ($token->[1] eq 'meta') {
349: if ($token->[4] !~ m:/>$:) {
350: $allmeta.="\n".$token->[4].'</meta>';
351: } else {
352: $allmeta.="\n".$token->[4];
353: }
354: } elsif (($token->[1] eq 'script') &&
355: ($bodydef==0)) {
356: $allscript.="\n\n"
357: .$parser->get_text('/script');
358: }
359: }
360: }
361: if ($output=~/\<body[^\>]*\>(.*)/si) {
362: $output=$1;
363: }
364: $output=~s/\<\/body\>.*//si;
365: if ($output=~/\<form/si) {
366: $nforms++;
367: $output=~s/\<form[^\>]*\>//gsi;
368: $output=~s/\<\/form[^\>]*\>//gsi;
369: if ($output=~/\<input[^\>]+name\s*=\s*[\'\"]*HWFILE/) {
370: $nuploads++;
371: }
372: $output=~
373: s/\<((?:input|select|button|textarea)[^\>]+)name\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 name="$prefix$2" $3\>/gsi;
374: $output=~
375: s/\<((?:input|select|button|textarea)[^\>]+)id\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 id="$idprefix$2" $3\>/gsi;
376: if ($nuploads) {
377: $output=~
378: s/\<(input[^\>]+name=\"\Q$prefix\EHWFILE[^\>]+)\s*id\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\)]*)\>/\<$1 id="$prefix$2" $3\>/gsi;
379: ($turninpaths{$prefix},$multiresps{$prefix}) =
380: &Apache::loncommon::get_turnedin_filepath($symb,$env{'user.name'},$env{'user.domain'});
381: if ($turninparent eq '') {
382: $turninparent = $turninpaths{$prefix};
383: $turninparent =~ s{(/[^/]+)$}{};
384: }
385: }
386: $output=~
387: s/\<((?:input|select)[^\>]+\Qjavascript:setSubmittedPart\E)\(\s*[\'\"]([^\'\"]+)[\'\"]*\s*\)/\<$1('$2','$prefix')/gsi;
388: }
389: $thisdir=~s/\/[^\/]*$//;
390: foreach (@rlinks) {
391: unless (($_=~/^https?\:\/\//i) ||
392: ($_=~/^\//) ||
393: ($_=~/^javascript:/i) ||
394: ($_=~/^mailto:/i) ||
395: ($_=~/^\#/)) {
396: my $newlocation=
397: &Apache::lonnet::hreflocation($thisdir,$_);
398: $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
399: }
400: }
401: # -------------------------------------------------- Deal with Applet codebases
402: $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
403: $ssibody{$_}=$output;
404: # ---------------------------------------------------------------- End SSI cell
405: }
406: }
407: }
408: }
409: unless ($contents) {
410: &Apache::loncommon::content_type($r,'text/html');
411: $r->send_http_header;
412: $r->print(&Apache::loncommon::start_page(undef,undef,
413: {'force_register' => 1,}));
414: $r->print(&mt('This page is either empty or it only contains resources that are currently hidden').'. ');
415: $r->print('<br /><br />'.&mt('Please use the LON-CAPA navigation arrows to move to another item in the course').
416: &Apache::loncommon::end_page());
417: } else {
418: # ------------------------------------------------------------------ Build page
419:
420: # ---------------------------------------------------------------- Send headers
421: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
422: if ($isxml) {
423: &Apache::loncommon::content_type($r,'text/xml');
424: } else {
425: &Apache::loncommon::content_type($r,'text/html');
426: }
427: $r->send_http_header;
428: # ------------------------------------------------------------------------ Head
429: if ($allscript) {
430: $allscript =
431: "\n".'<script type="text/javascript">'."\n".
432: $allscript.
433: "\n</script>\n";
434: }
435: if (($nforms) && ($nuploads)) {
436: $allscript .= &Apache::lonhtmlcommon::file_submissionchk_js(\%turninpaths,\%multiresps);
437: }
438: if (($nforms) && (&Apache::lonhtmlcommon::htmlareabrowser())) {
439: my %textarea_args = (
440: dragmath => 'math',
441: );
442: $allscript .= &Apache::lonhtmlcommon::htmlareaselectactive(\%textarea_args);
443: }
444: # ------------------------------------------------------------------ Start body
445: $r->print(&Apache::loncommon::start_page(undef,$allscript,
446: {'force_register' => 1,
447: 'bgcolor' => '#ffffff',}));
448: # ------------------------------------------------------------------ Start form
449: if ($nforms) {
450: my $fmtag = '<form name="lonhomework" method="post" enctype="multipart/form-data"';
451: if ($nuploads) {
452: my $multi;
453: if ($nuploads > 1) {
454: $multi = 1;
455: }
456: $fmtag .= 'onsubmit="return file_submission_check(this,'."'$turninparent','$multi'".');"';
457: }
458: $fmtag .= ' action="'.
459: &Apache::lonenc::check_encrypt($requrl)
460: .'">';
461: $r->print($fmtag);
462: }
463: } elsif (($target eq 'tex') || ($target eq 'tex_answer')) {
464: # I think this is not needed as the header
465: # will be put in for each of the page parts
466: # by the londefdef.pm now that we are opening up
467: # the parts of a page.
468: #$r->print('\documentclass{article}
469: # \newcommand{\keephidden}[1]{}
470: # \usepackage[dvips]{graphicx}
471: # \usepackage{epsfig}
472: # \usepackage{calc}
473: # \usepackage{longtable}
474: # \begin{document}');
475: }
476: # ----------------------------------------------------------------- Start table
477: if (($target eq 'tex') || ($target eq 'tex_answer')) {
478: # # $r->print('\begin{longtable}INSERTTHEHEADOFLONGTABLE\endfirsthead\endhead ');
479: if ($number_of_columns le $lcm) {$number_of_columns=$lcm;};
480: } else {
481: $r->print('<table width="100%" cols="'.$lcm.'" border="0">');
482: }
483: # generate rows
484: for ($i=0;$i<=$#rows;$i++) {
485: if ($rows[$i]) {
486: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
487: $r->print("\n<tr>");
488: }
489: my @colcont=split(/\&/,$rows[$i]);
490: my $avespan=$lcm/($#colcont+1);
491: for ($j=0;$j<=$#colcont;$j++) {
492: my $rid=$colcont[$j];
493: my $metainfo =&get_buttons(\%hash,$rid).'<br />';
494: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
495: $r->print('<td colspan="'.$avespan.'"');
496: }
497: if (($cellemb{$rid} eq 'ssi') || ($cellexternal{$rid})) {
498: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
499: if ($ssibgcolor{$rid}) {
500: $r->print(' bgcolor="'.
501: $ssibgcolor{$rid}.'"');
502: }
503: $r->print('>'.$metainfo.'<font');
504:
505: if ($ssitext{$rid}) {
506: $r->print(' text="'.$ssitext{$rid}.'"');
507: }
508: if ($ssilink{$rid}) {
509: $r->print(' link="'.$ssilink{$rid}.'"');
510: }
511: if ($ssitext{$rid}) {
512: $r->print(' vlink="'.$ssivlink{$rid}.'"');
513: }
514: if ($ssialink{$rid}) {
515: $r->print(' alink="'.$ssialink{$rid}.'"');
516: }
517: $r->print('>');
518: }
519: unless (($cellexternal{$rid}) &&
520: ($target eq 'tex') && ($target eq 'tex_answer')) {
521: $r->print($ssibody{$rid});
522: }
523: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
524: $r->print('</font>');
525: }
526: if ($env{'course.'.
527: $env{'request.course.id'}.
528: '.pageseparators'} eq 'yes') {
529: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
530: $r->print('<hr />');
531: }
532: }
533: } elsif ($cellemb{$rid} eq 'img') {
534: $r->print('>'.$metainfo.'<img src="'.
535: $hash{'src_'.$rid}.'" />');
536: } elsif ($cellemb{$rid} eq 'emb') {
537: $r->print('>'.$metainfo.'<embed src="'.
538: $hash{'src_'.$rid}.'"></embed>');
539: } elsif (&Apache::lonnet::declutter($hash{'src_'.$rid}) !~/\.(sequence|page)$/) {
540: $r->print($metainfo.'<b>'.$hash{'title_'.$rid}.'</b><br />'.
541: &mt('It is recommended that you use an up-to-date virus scanner before handling this file.').'</p><p><table>'.
542: &Apache::londocs::entryline(0,&mt("Click to download or use your browser's Save Link function"),'/'.&Apache::lonnet::declutter($hash{'src_'.$rid})).'</table></p><br />');
543: }
544: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
545: $r->print('</td>');
546: } else {
547: # for (my $incol=1;$incol<=$avespan;$incol++) {
548: # $r->print(' & ');
549: # }
550: }
551: }
552: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
553: $r->print('</tr>');
554: } else {
555: # $r->print('REMOVETHEHEADOFLONGTABLE\\\\');
556: }
557: }
558: }
559: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
560: $r->print("\n</table>");
561: } else {
562: # $r->print('\end{longtable}\strut');
563: }
564: # ---------------------------------------------------------------- Submit, etc.
565: if ($nforms) {
566: $r->print(
567: '<input name="all_submit" value="Submit All" type="'.
568: (($nforms>1)?'submit':'hidden').'"></input></form>');
569: }
570: unless (($target eq 'tex') || ($target eq 'tex_answer')) {
571: $r->print(&Apache::loncommon::end_page({'discussion'
572: => 1,}));
573: } else {
574: $r->print('\end{document}'.$number_of_columns);
575: }
576: &Apache::lonnet::symblist($requrl,%symbhash);
577: my ($map,$id,$url)=&Apache::lonnet::decode_symb(&Apache::lonnet::symbread());
578: &Apache::lonnet::symblist($map,'last_known'=>[$url,$id]);
579: # -------------------------------------------------------------------- End page
580: }
581: # ------------------------------------------------------------- End render page
582: } else {
583: &Apache::loncommon::content_type($r,'text/html');
584: $r->send_http_header;
585: &Apache::lonsequence::viewmap($r,$requrl);
586: }
587: # ------------------------------------------------------------------ Untie hash
588: unless (untie(%hash)) {
589: &Apache::lonnet::logthis("<font color=blue>WARNING: ".
590: "Could not untie coursemap $fn (browse).</font>");
591: }
592: # -------------------------------------------------------------------- All done
593: return OK;
594: # ----------------------------------------------- Errors, hash could no be tied
595: }
596: }
597: }
598: &Apache::loncommon::content_type($r,'text/html');
599: $r->send_http_header;
600: &Apache::lonsequence::viewmap($r,$requrl);
601: return OK;
602: }
603:
604: sub get_buttons {
605: my ($hash,$rid) = @_;
606:
607: my $metainfo = '';
608: my $esrc=&Apache::lonnet::declutter($hash->{'src_'.$rid});
609: my ($mapid,$resid)=split(/\./,$rid);
610: my $symb=&Apache::lonnet::encode_symb($hash->{'map_id_'.$mapid},
611: $resid,
612: $hash->{'src_'.$rid});
613: if ($hash->{'encrypted_'.$rid}) {
614: $symb=&Apache::lonenc::encrypted($symb);
615: $esrc=&Apache::lonenc::encrypted($esrc);
616: }
617: if ($hash->{'src_'.$rid} !~ m-^/uploaded/-
618: && $hash->{'src_'.$rid} !~ m{^https?://}
619: && !$env{'request.enc'}
620: && ($env{'request.role.adv'}
621: || !$hash->{'encrypted_'.$rid})) {
622: $metainfo .='<a name="'.&escape($symb).'" />'.
623: '<a href="'.$hash->{'src_'.$rid}.'.meta'.'" target="LONcatInfo">'.
624: '<img src="/res/adm/pages/catalog.png" class="LC_icon"'.
625: ' alt="'.&mt('Show Metadata').'"'.
626: ' title="'.&mt('Show Metadata').'" />'.
627: '</a>';
628: }
629: if (($hash->{'src_'.$rid} !~ m{^/uploaded/}) &&
630: ($hash->{'src_'.$rid} !~ m{^https?://})) {
631: $metainfo .= '<a href="/adm/evaluate?postdata='.
632: &escape($esrc).
633: '" target="LONcatInfo">'.
634: '<img src="/res/adm/pages/eval.png" class="LC_icon"'.
635: ' alt="'.&mt('Provide my evaluation of this resource').'"'.
636: ' title="'.&mt('Provide my evaluation of this resource').'" />'.
637: '</a>';
638: }
639: if (($hash->{'src_'.$rid}=~/$LONCAPA::assess_re/) &&
640: ($hash->{'src_'.$rid} !~ m-^/uploaded/-)) {
641:
642: if (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {
643: $metainfo.=
644: '<a href="/adm/grades?symb='.&escape($symb).
645: # '&command=submission" target="LONcatInfo">'.
646: '&command=submission">'.
647: '<img src="/adm/lonMisc/subm_button.png" class="LC_icon"'.
648: ' alt="'.&mt('View Submissions for a Student or a Group of Students').'"'.
649: ' title="'.&mt('View Submissions for a Student or a Group of Students').'" />'.
650: '</a>'.
651: '<a href="/adm/grades?symb='.&escape($symb).
652: # '&command=gradingmenu" target="LONcatInfo">'.
653: '&command=gradingmenu">'.
654: '<img src="/res/adm/pages/pgrd.png" class="LC_icon"'.
655: ' alt="'.&mt('Content Grades').'"'.
656: ' title="'.&mt('Content Grades').'" />'.
657: '</a>';
658: }
659: if (&Apache::lonnet::allowed('opa',$env{'request.course.id'})) {
660: $metainfo.=
661: '<a href="/adm/parmset?symb='.&escape($symb).
662: # '" target="LONcatInfo">'.
663: '" >'.
664: '<img src="/adm/lonMisc/pprm_button.png" class="LC_icon"'.
665: ' alt="'.&mt('Content Settings').'"'.
666: ' title="'.&mt('Content Settings').'" />'.
667: '</a>';
668: }
669: }
670: if (($env{'request.course.id'}) && (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
671: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
672: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
673: my $file=&Apache::lonnet::declutter($hash->{'src_'.$rid});
674: my ($cfile,$home,$switchserver,$forceedit,$forceview) =
675: &Apache::lonnet::can_edit_resource($file,$cnum,$cdom,$hash->{'src_'.$rid},$symb);
676: if ($cfile ne '') {
677: my $jscall = &Apache::lonhtmlcommon::jump_to_editres($cfile,$home,$switchserver,
678: $forceedit,1,$symb,undef,
679: &escape($env{'form.title'}));
680: if ($jscall) {
681: my $icon = 'pcstr.png';
682: my $label = &mt('Edit');
683: my $title = &mt('Edit this resource');
684: my $pic = '<img src="'.&Apache::loncommon::lonhttpdurl('/res/adm/pages/'.$icon).'"'.
685: ' class="LC_icon" alt="'.$label.'" title="'.$title.'" />';
686: $metainfo .= ' <a href="javascript:'.$jscall.';">'.$pic.'</a>';
687: }
688: }
689: }
690: return $metainfo;
691: }
692:
693: 1;
694: __END__
695:
696:
697: =head1 NAME
698:
699: Apache::lonpage - Page Handler
700:
701: =head1 SYNOPSIS
702:
703: Invoked by /etc/httpd/conf/srm.conf:
704:
705: <LocationMatch "^/res/.*\.page$>
706: SetHandler perl-script
707: PerlHandler Apache::lonpage
708: </LocationMatch>
709:
710: =head1 INTRODUCTION
711:
712: This module renders a .page resource.
713:
714: This is part of the LearningOnline Network with CAPA project
715: described at http://www.lon-capa.org.
716:
717: =head1 HANDLER SUBROUTINE
718:
719: This routine is called by Apache and mod_perl.
720:
721: =over 4
722:
723: =item *
724:
725: set document type for header only
726:
727: =item *
728:
729: tie db file
730:
731: =item *
732:
733: render page
734:
735: =item *
736:
737: add to symb list
738:
739: =item *
740:
741: page parms
742:
743: =item *
744:
745: Get SSI output, post parameters
746:
747: =item *
748:
749: SSI cell rendering
750:
751: =item *
752:
753: Deal with Applet codebases
754:
755: =item *
756:
757: Build page
758:
759: =item *
760:
761: send headers
762:
763: =item *
764:
765: start body
766:
767: =item *
768:
769: start form
770:
771: =item *
772:
773: start table
774:
775: =item *
776:
777: submit element, etc, render page, untie hash
778:
779: =back
780:
781: =head1 OTHER SUBROUTINES
782:
783: =over 4
784:
785: =item *
786:
787: euclid() : Euclid's method for determining the greatest common denominator.
788:
789: =item *
790:
791: tracetable() : Build page table.
792:
793: =back
794:
795: =cut
796:
797:
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