1: # The LearningOnline Network with CAPA
2: # a pile of common routines
3: #
4: # $Id: loncommon.pm,v 1.197 2004/07/06 15:48:30 matthew 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: # Makes a table out of the previous attempts
30: # Inputs result_from_symbread, user, domain, course_id
31: # Reads in non-network-related .tab files
32:
33: # POD header:
34:
35: =pod
36:
37: =head1 NAME
38:
39: Apache::loncommon - pile of common routines
40:
41: =head1 SYNOPSIS
42:
43: Common routines for manipulating connections, student answers,
44: domains, common Javascript fragments, etc.
45:
46: =head1 OVERVIEW
47:
48: A collection of commonly used subroutines that don't have a natural
49: home anywhere else. This collection helps remove
50: redundancy from other modules and increase efficiency of memory usage.
51:
52: =cut
53:
54: # End of POD header
55: package Apache::loncommon;
56:
57: use strict;
58: use Apache::lonnet();
59: use GDBM_File;
60: use POSIX qw(strftime mktime);
61: use Apache::Constants qw(:common :http :methods);
62: use Apache::lonmsg();
63: use Apache::lonmenu();
64: use Apache::lonlocal;
65: use HTML::Entities;
66:
67: my $readit;
68:
69: ##
70: ## Global Variables
71: ##
72:
73: # ----------------------------------------------- Filetypes/Languages/Copyright
74: my %language;
75: my %supported_language;
76: my %cprtag;
77: my %scprtag;
78: my %fe; my %fd;
79: my %category_extensions;
80:
81: # ---------------------------------------------- Designs
82:
83: my %designhash;
84:
85: # ---------------------------------------------- Thesaurus variables
86: #
87: # %Keywords:
88: # A hash used by &keyword to determine if a word is considered a keyword.
89: # $thesaurus_db_file
90: # Scalar containing the full path to the thesaurus database.
91:
92: my %Keywords;
93: my $thesaurus_db_file;
94:
95: #
96: # Initialize values from language.tab, copyright.tab, filetypes.tab,
97: # thesaurus.tab, and filecategories.tab.
98: #
99: BEGIN {
100: # Variable initialization
101: $thesaurus_db_file = $Apache::lonnet::perlvar{'lonTabDir'}."/thesaurus.db";
102: #
103: unless ($readit) {
104: # ------------------------------------------------------------------- languages
105: {
106: my $langtabfile = $Apache::lonnet::perlvar{'lonTabDir'}.
107: '/language.tab';
108: if ( open(my $fh,"<$langtabfile") ) {
109: while (<$fh>) {
110: next if /^\#/;
111: chomp;
112: my ($key,$two,$country,$three,$enc,$val,$sup)=(split(/\t/,$_));
113: $language{$key}=$val.' - '.$enc;
114: if ($sup) {
115: $supported_language{$key}=$sup;
116: }
117: }
118: close($fh);
119: }
120: }
121: # ------------------------------------------------------------------ copyrights
122: {
123: my $copyrightfile = $Apache::lonnet::perlvar{'lonIncludes'}.
124: '/copyright.tab';
125: if ( open (my $fh,"<$copyrightfile") ) {
126: while (<$fh>) {
127: next if /^\#/;
128: chomp;
129: my ($key,$val)=(split(/\s+/,$_,2));
130: $cprtag{$key}=$val;
131: }
132: close($fh);
133: }
134: }
135: # ------------------------------------------------------------------ source copyrights
136: {
137: my $sourcecopyrightfile = $Apache::lonnet::perlvar{'lonIncludes'}.
138: '/source_copyright.tab';
139: if ( open (my $fh,"<$sourcecopyrightfile") ) {
140: while (<$fh>) {
141: next if /^\#/;
142: chomp;
143: my ($key,$val)=(split(/\s+/,$_,2));
144: $scprtag{$key}=$val;
145: }
146: close($fh);
147: }
148: }
149:
150: # -------------------------------------------------------------- domain designs
151:
152: my $filename;
153: my $designdir=$Apache::lonnet::perlvar{'lonTabDir'}.'/lonDomColors';
154: opendir(DIR,$designdir);
155: while ($filename=readdir(DIR)) {
156: my ($domain)=($filename=~/^(\w+)\./);
157: {
158: my $designfile = $designdir.'/'.$filename;
159: if ( open (my $fh,"<$designfile") ) {
160: while (<$fh>) {
161: next if /^\#/;
162: chomp;
163: my ($key,$val)=(split(/\=/,$_));
164: if ($val) { $designhash{$domain.'.'.$key}=$val; }
165: }
166: close($fh);
167: }
168: }
169:
170: }
171: closedir(DIR);
172:
173:
174: # ------------------------------------------------------------- file categories
175: {
176: my $categoryfile = $Apache::lonnet::perlvar{'lonTabDir'}.
177: '/filecategories.tab';
178: if ( open (my $fh,"<$categoryfile") ) {
179: while (<$fh>) {
180: next if /^\#/;
181: chomp;
182: my ($extension,$category)=(split(/\s+/,$_,2));
183: push @{$category_extensions{lc($category)}},$extension;
184: }
185: close($fh);
186: }
187:
188: }
189: # ------------------------------------------------------------------ file types
190: {
191: my $typesfile = $Apache::lonnet::perlvar{'lonTabDir'}.
192: '/filetypes.tab';
193: if ( open (my $fh,"<$typesfile") ) {
194: while (<$fh>) {
195: next if (/^\#/);
196: chomp;
197: my ($ending,$emb,$descr)=split(/\s+/,$_,3);
198: if ($descr ne '') {
199: $fe{$ending}=lc($emb);
200: $fd{$ending}=$descr;
201: }
202: }
203: close($fh);
204: }
205: }
206: &Apache::lonnet::logthis(
207: "<font color=yellow>INFO: Read file types</font>");
208: $readit=1;
209: } # end of unless($readit)
210:
211: }
212:
213: ###############################################################
214: ## HTML and Javascript Helper Functions ##
215: ###############################################################
216:
217: =pod
218:
219: =head1 HTML and Javascript Functions
220:
221: =over 4
222:
223: =item * browser_and_searcher_javascript ()
224:
225: X<browsing, javascript>X<searching, javascript>Returns a string
226: containing javascript with two functions, C<openbrowser> and
227: C<opensearcher>. Returned string does not contain E<lt>scriptE<gt>
228: tags.
229:
230: =item * openbrowser(formname,elementname,only,omit) [javascript]
231:
232: inputs: formname, elementname, only, omit
233:
234: formname and elementname indicate the name of the html form and name of
235: the element that the results of the browsing selection are to be placed in.
236:
237: Specifying 'only' will restrict the browser to displaying only files
238: with the given extension. Can be a comma separated list.
239:
240: Specifying 'omit' will restrict the browser to NOT displaying files
241: with the given extension. Can be a comma separated list.
242:
243: =item * opensearcher(formname, elementname) [javascript]
244:
245: Inputs: formname, elementname
246:
247: formname and elementname specify the name of the html form and the name
248: of the element the selection from the search results will be placed in.
249:
250: =cut
251:
252: sub browser_and_searcher_javascript {
253: my $resurl=&lastresurl();
254: return <<END;
255: var editbrowser = null;
256: function openbrowser(formname,elementname,only,omit,titleelement) {
257: var url = '$resurl/?';
258: if (editbrowser == null) {
259: url += 'launch=1&';
260: }
261: url += 'catalogmode=interactive&';
262: url += 'mode=edit&';
263: url += 'form=' + formname + '&';
264: if (only != null) {
265: url += 'only=' + only + '&';
266: }
267: if (omit != null) {
268: url += 'omit=' + omit + '&';
269: }
270: if (titleelement != null) {
271: url += 'titleelement=' + titleelement + '&';
272: }
273: url += 'element=' + elementname + '';
274: var title = 'Browser';
275: var options = 'scrollbars=1,resizable=1,menubar=0';
276: options += ',width=700,height=600';
277: editbrowser = open(url,title,options,'1');
278: editbrowser.focus();
279: }
280: var editsearcher;
281: function opensearcher(formname,elementname,titleelement) {
282: var url = '/adm/searchcat?';
283: if (editsearcher == null) {
284: url += 'launch=1&';
285: }
286: url += 'catalogmode=interactive&';
287: url += 'mode=edit&';
288: url += 'form=' + formname + '&';
289: if (titleelement != null) {
290: url += 'titleelement=' + titleelement + '&';
291: }
292: url += 'element=' + elementname + '';
293: var title = 'Search';
294: var options = 'scrollbars=1,resizable=1,menubar=0';
295: options += ',width=700,height=600';
296: editsearcher = open(url,title,options,'1');
297: editsearcher.focus();
298: }
299: END
300: }
301:
302: sub lastresurl {
303: if ($ENV{'environment.lastresurl'}) {
304: return $ENV{'environment.lastresurl'}
305: } else {
306: return '/res';
307: }
308: }
309:
310: sub storeresurl {
311: my $resurl=&Apache::lonnet::clutter(shift);
312: unless ($resurl=~/^\/res/) { return 0; }
313: $resurl=~s/\/$//;
314: &Apache::lonnet::put('environment',{'lastresurl' => $resurl});
315: &Apache::lonnet::appenv('environment.lastresurl' => $resurl);
316: return 1;
317: }
318:
319: sub studentbrowser_javascript {
320: unless (
321: (($ENV{'request.course.id'}) &&
322: (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})))
323: || ($ENV{'request.role'}=~/^(au|dc|su)/)
324: ) { return ''; }
325: return (<<'ENDSTDBRW');
326: <script type="text/javascript" language="Javascript" >
327: var stdeditbrowser;
328: function openstdbrowser(formname,uname,udom,roleflag) {
329: var url = '/adm/pickstudent?';
330: var filter;
331: eval('filter=document.'+formname+'.'+uname+'.value;');
332: if (filter != null) {
333: if (filter != '') {
334: url += 'filter='+filter+'&';
335: }
336: }
337: url += 'form=' + formname + '&unameelement='+uname+
338: '&udomelement='+udom;
339: if (roleflag) { url+="&roles=1"; }
340: var title = 'Student_Browser';
341: var options = 'scrollbars=1,resizable=1,menubar=0';
342: options += ',width=700,height=600';
343: stdeditbrowser = open(url,title,options,'1');
344: stdeditbrowser.focus();
345: }
346: </script>
347: ENDSTDBRW
348: }
349:
350: sub selectstudent_link {
351: my ($form,$unameele,$udomele)=@_;
352: if ($ENV{'request.course.id'}) {
353: unless (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})) {
354: return '';
355: }
356: return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
357: '","'.$udomele.'");'."'>".&mt('Select User')."</a>";
358: }
359: if ($ENV{'request.role'}=~/^(au|dc|su)/) {
360: return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
361: '","'.$udomele.'",1);'."'>".&mt('Select User')."</a>";
362: }
363: return '';
364: }
365:
366: sub coursebrowser_javascript {
367: my ($domainfilter)=@_;
368: return (<<ENDSTDBRW);
369: <script type="text/javascript" language="Javascript" >
370: var stdeditbrowser;
371: function opencrsbrowser(formname,uname,udom,desc) {
372: var url = '/adm/pickcourse?';
373: var filter;
374: if (filter != null) {
375: if (filter != '') {
376: url += 'filter='+filter+'&';
377: }
378: }
379: var domainfilter='$domainfilter';
380: if (domainfilter != null) {
381: if (domainfilter != '') {
382: url += 'domainfilter='+domainfilter+'&';
383: }
384: }
385: url += 'form=' + formname + '&cnumelement='+uname+
386: '&cdomelement='+udom+
387: '&cnameelement='+desc;
388: var title = 'Course_Browser';
389: var options = 'scrollbars=1,resizable=1,menubar=0';
390: options += ',width=700,height=600';
391: stdeditbrowser = open(url,title,options,'1');
392: stdeditbrowser.focus();
393: }
394: </script>
395: ENDSTDBRW
396: }
397:
398: sub selectcourse_link {
399: my ($form,$unameele,$udomele,$desc)=@_;
400: return "<a href='".'javascript:opencrsbrowser("'.$form.'","'.$unameele.
401: '","'.$udomele.'","'.$desc.'");'."'>".&mt('Select Course')."</a>";
402: }
403:
404: =pod
405:
406: =item * linked_select_forms(...)
407:
408: linked_select_forms returns a string containing a <script></script> block
409: and html for two <select> menus. The select menus will be linked in that
410: changing the value of the first menu will result in new values being placed
411: in the second menu. The values in the select menu will appear in alphabetical
412: order.
413:
414: linked_select_forms takes the following ordered inputs:
415:
416: =over 4
417:
418: =item * $formname, the name of the <form> tag
419:
420: =item * $middletext, the text which appears between the <select> tags
421:
422: =item * $firstdefault, the default value for the first menu
423:
424: =item * $firstselectname, the name of the first <select> tag
425:
426: =item * $secondselectname, the name of the second <select> tag
427:
428: =item * $hashref, a reference to a hash containing the data for the menus.
429:
430: =back
431:
432: Below is an example of such a hash. Only the 'text', 'default', and
433: 'select2' keys must appear as stated. keys(%menu) are the possible
434: values for the first select menu. The text that coincides with the
435: first menu value is given in $menu{$choice1}->{'text'}. The values
436: and text for the second menu are given in the hash pointed to by
437: $menu{$choice1}->{'select2'}.
438:
439: my %menu = ( A1 => { text =>"Choice A1" ,
440: default => "B3",
441: select2 => {
442: B1 => "Choice B1",
443: B2 => "Choice B2",
444: B3 => "Choice B3",
445: B4 => "Choice B4"
446: }
447: },
448: A2 => { text =>"Choice A2" ,
449: default => "C2",
450: select2 => {
451: C1 => "Choice C1",
452: C2 => "Choice C2",
453: C3 => "Choice C3"
454: }
455: },
456: A3 => { text =>"Choice A3" ,
457: default => "D6",
458: select2 => {
459: D1 => "Choice D1",
460: D2 => "Choice D2",
461: D3 => "Choice D3",
462: D4 => "Choice D4",
463: D5 => "Choice D5",
464: D6 => "Choice D6",
465: D7 => "Choice D7"
466: }
467: }
468: );
469:
470: =cut
471:
472: sub linked_select_forms {
473: my ($formname,
474: $middletext,
475: $firstdefault,
476: $firstselectname,
477: $secondselectname,
478: $hashref
479: ) = @_;
480: my $second = "document.$formname.$secondselectname";
481: my $first = "document.$formname.$firstselectname";
482: # output the javascript to do the changing
483: my $result = '';
484: $result.="<script>\n";
485: $result.="var select2data = new Object();\n";
486: $" = '","';
487: my $debug = '';
488: foreach my $s1 (sort(keys(%$hashref))) {
489: $result.="select2data.d_$s1 = new Object();\n";
490: $result.="select2data.d_$s1.def = new String('".
491: $hashref->{$s1}->{'default'}."');\n";
492: $result.="select2data.d_$s1.values = new Array(";
493: my @s2values = sort(keys( %{ $hashref->{$s1}->{'select2'} } ));
494: $result.="\"@s2values\");\n";
495: $result.="select2data.d_$s1.texts = new Array(";
496: my @s2texts;
497: foreach my $value (@s2values) {
498: push @s2texts, $hashref->{$s1}->{'select2'}->{$value};
499: }
500: $result.="\"@s2texts\");\n";
501: }
502: $"=' ';
503: $result.= <<"END";
504:
505: function select1_changed() {
506: // Determine new choice
507: var newvalue = "d_" + $first.value;
508: // update select2
509: var values = select2data[newvalue].values;
510: var texts = select2data[newvalue].texts;
511: var select2def = select2data[newvalue].def;
512: var i;
513: // out with the old
514: for (i = 0; i < $second.options.length; i++) {
515: $second.options[i] = null;
516: }
517: // in with the nuclear
518: for (i=0;i<values.length; i++) {
519: $second.options[i] = new Option(values[i]);
520: $second.options[i].value = values[i];
521: $second.options[i].text = texts[i];
522: if (values[i] == select2def) {
523: $second.options[i].selected = true;
524: }
525: }
526: }
527: </script>
528: END
529: # output the initial values for the selection lists
530: $result .= "<select size=\"1\" name=\"$firstselectname\" onchange=\"select1_changed()\">\n";
531: foreach my $value (sort(keys(%$hashref))) {
532: $result.=" <option value=\"$value\" ";
533: $result.=" selected=\"true\" " if ($value eq $firstdefault);
534: $result.=">".&mt($hashref->{$value}->{'text'})."</option>\n";
535: }
536: $result .= "</select>\n";
537: my %select2 = %{$hashref->{$firstdefault}->{'select2'}};
538: $result .= $middletext;
539: $result .= "<select size=\"1\" name=\"$secondselectname\">\n";
540: my $seconddefault = $hashref->{$firstdefault}->{'default'};
541: foreach my $value (sort(keys(%select2))) {
542: $result.=" <option value=\"$value\" ";
543: $result.=" selected=\"true\" " if ($value eq $seconddefault);
544: $result.=">".&mt($select2{$value})."</option>\n";
545: }
546: $result .= "</select>\n";
547: # return $debug;
548: return $result;
549: } # end of sub linked_select_forms {
550:
551: =pod
552:
553: =item * help_open_topic($topic, $text, $stayOnPage, $width, $height)
554:
555: Returns a string corresponding to an HTML link to the given help
556: $topic, where $topic corresponds to the name of a .tex file in
557: /home/httpd/html/adm/help/tex, with underscores replaced by
558: spaces.
559:
560: $text will optionally be linked to the same topic, allowing you to
561: link text in addition to the graphic. If you do not want to link
562: text, but wish to specify one of the later parameters, pass an
563: empty string.
564:
565: $stayOnPage is a value that will be interpreted as a boolean. If true,
566: the link will not open a new window. If false, the link will open
567: a new window using Javascript. (Default is false.)
568:
569: $width and $height are optional numerical parameters that will
570: override the width and height of the popped up window, which may
571: be useful for certain help topics with big pictures included.
572:
573: =cut
574:
575: sub help_open_topic {
576: my ($topic, $text, $stayOnPage, $width, $height) = @_;
577: $text = "" if (not defined $text);
578: $stayOnPage = 0 if (not defined $stayOnPage);
579: if ($ENV{'browser.interface'} eq 'textual' ||
580: $ENV{'environment.remote'} eq 'off' ) {
581: $stayOnPage=1;
582: }
583: $width = 350 if (not defined $width);
584: $height = 400 if (not defined $height);
585: my $filename = $topic;
586: $filename =~ s/ /_/g;
587:
588: my $template = "";
589: my $link;
590:
591: $topic=~s/\W/\_/g;
592:
593: if (!$stayOnPage)
594: {
595: $link = "javascript:void(open('/adm/help/${filename}.hlp', 'Help_for_$topic', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height,resizable=yes'))";
596: }
597: else
598: {
599: $link = "/adm/help/${filename}.hlp";
600: }
601:
602: # Add the text
603: if ($text ne "")
604: {
605: $template .=
606: "<table bgcolor='#3333AA' cellspacing='1' cellpadding='1' border='0'><tr>".
607: "<td bgcolor='#5555FF'><a href=\"$link\"><font color='#FFFFFF' size='2'>$text</font></a>";
608: }
609:
610: # Add the graphic
611: my $title = &mt('Online Help');
612: $template .= <<"ENDTEMPLATE";
613: <a href="$link" title="$title"><image src="/adm/help/gif/smallHelp.gif" border="0" alt="(Help: $topic)" /></a>
614: ENDTEMPLATE
615: if ($text ne '') { $template.='</td></tr></table>' };
616: return $template;
617:
618: }
619:
620: # This is a quicky function for Latex cheatsheet editing, since it
621: # appears in at least four places
622: sub helpLatexCheatsheet {
623: my $other = shift;
624: my $addOther = '';
625: if ($other) {
626: $addOther = Apache::loncommon::help_open_topic($other, shift,
627: undef, undef, 600) .
628: '</td><td>';
629: }
630: return '<table><tr><td>'.
631: $addOther .
632: &Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',
633: undef,undef,600)
634: .'</td><td>'.
635: &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',
636: undef,undef,600)
637: .'</td></tr></table>';
638: }
639:
640: sub help_open_menu {
641: my ($color,$topic,$component_help,$function,$faq,$bug,$stayOnPage,$width,$height,$text) = @_;
642: $text = "" if (not defined $text);
643: $stayOnPage = 0 if (not defined $stayOnPage);
644: if ($ENV{'browser.interface'} eq 'textual' ||
645: $ENV{'environment.remote'} eq 'off' ) {
646: $stayOnPage=1;
647: }
648: $width = 620 if (not defined $width);
649: $height = 600 if (not defined $height);
650: my $link='';
651: my $title = &mt('Choose your help');
652: my $origurl = $ENV{'REQUEST_URI'};
653: my $timestamp = time;
654: foreach (\$color,\$function,\$topic,\$component_help,\$faq,\$bug,\$origurl) {
655: $$_ = &Apache::lonnet::escape($$_);
656: }
657:
658: if (!$stayOnPage) {
659: $link = "javascript:helpMenu('open')";
660: } else {
661: $link = "javascript:helpMenu('display')";
662: }
663: my $banner_link = "/adm/helpmenu?page=banner&color=$color&function=$function&topic=$topic&component_help=$component_help&faq=$faq&bug=$bug&origurl=$origurl&stamp=$timestamp";
664: my $details_link = "/adm/helpmenu?page=body&color=$color&function=$function&topic=$topic&component_help=$component_help&faq=$faq&bug=$bug&origurl=$origurl&stamp=$timestamp";
665: my $template;
666: if ($text ne "") {
667: $template .=
668: "<table bgcolor='#337733' cellspacing='1' cellpadding='1' border='0'><tr>".
669: "<td bgcolor='#448844'><a href=\"$link\"><font color='#FFFFFF' size='2'>$text</font></a>";
670: }
671: $template .= <<"ENDTEMPLATE";
672: <script>
673: function helpMenu(caller) {
674: if (caller == 'open') {
675: newWindow = window.open("","helpmenu","HEIGHT=$height,WIDTH=$width,resize=yes,scrollbars=yes" )
676: caller = newWindow.document
677: } else {
678: caller = this.document
679: }
680: caller.write("<html><head><title>LON-CAPA Help Menu</title><meta http-equiv='pragma' content='no-cache'></head>")
681: caller.write("<frameset rows='105,*' border='0'><frame name='bannerframe' src='$banner_link'><frame name='bodyframe' src='$details_link'></frameset>")
682: caller.write("</html>")
683: caller.close()
684: if (caller == newWindow.document) {
685: caller.focus()
686: }
687: }
688: </script>
689: <a href="$link" title="$title"><image src="/adm/lonMisc/smallFAQ.gif" border="0" alt="(Help Menu)" /></a>
690: ENDTEMPLATE
691: if ($text ne '') { $template.='</td></tr></table>' };
692: return $template;
693: }
694:
695: sub help_open_bug {
696: my ($topic, $text, $stayOnPage, $width, $height) = @_;
697: unless ($ENV{'user.adv'}) { return ''; }
698: unless ($Apache::lonnet::perlvar{'BugzillaHost'}) { return ''; }
699: $text = "" if (not defined $text);
700: $stayOnPage = 0 if (not defined $stayOnPage);
701: if ($ENV{'browser.interface'} eq 'textual' ||
702: $ENV{'environment.remote'} eq 'off' ) {
703: $stayOnPage=1;
704: }
705: $width = 600 if (not defined $width);
706: $height = 600 if (not defined $height);
707:
708: $topic=~s/\W+/\+/g;
709: my $link='';
710: my $template='';
711: my $url=$Apache::lonnet::perlvar{'BugzillaHost'}.'enter_bug.cgi?product=LON-CAPA&bug_file_loc='.
712: &Apache::lonnet::escape($ENV{'REQUEST_URI'}).'&component='.$topic;
713: if (!$stayOnPage)
714: {
715: $link = "javascript:void(open('$url', 'Bugzilla', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height,resizable=yes'))";
716: }
717: else
718: {
719: $link = $url;
720: }
721: # Add the text
722: if ($text ne "")
723: {
724: $template .=
725: "<table bgcolor='#AA3333' cellspacing='1' cellpadding='1' border='0'><tr>".
726: "<td bgcolor='#FF5555'><a href=\"$link\"><font color='#FFFFFF' size='2'>$text</font></a>";
727: }
728:
729: # Add the graphic
730: my $title = &mt('Report a Bug');
731: $template .= <<"ENDTEMPLATE";
732: <a href="$link" title="$title"><image src="/adm/lonMisc/smallBug.gif" border="0" alt="(Bug: $topic)" /></a>
733: ENDTEMPLATE
734: if ($text ne '') { $template.='</td></tr></table>' };
735: return $template;
736:
737: }
738:
739: sub help_open_faq {
740: my ($topic, $text, $stayOnPage, $width, $height) = @_;
741: unless ($ENV{'user.adv'}) { return ''; }
742: unless ($Apache::lonnet::perlvar{'FAQHost'}) { return ''; }
743: $text = "" if (not defined $text);
744: $stayOnPage = 0 if (not defined $stayOnPage);
745: if ($ENV{'browser.interface'} eq 'textual' ||
746: $ENV{'environment.remote'} eq 'off' ) {
747: $stayOnPage=1;
748: }
749: $width = 350 if (not defined $width);
750: $height = 400 if (not defined $height);
751:
752: $topic=~s/\W+/\+/g;
753: my $link='';
754: my $template='';
755: my $url=$Apache::lonnet::perlvar{'FAQHost'}.'/fom/cache/'.$topic.'.html';
756: if (!$stayOnPage)
757: {
758: $link = "javascript:void(open('$url', 'FAQ-O-Matic', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height,resizable=yes'))";
759: }
760: else
761: {
762: $link = $url;
763: }
764:
765: # Add the text
766: if ($text ne "")
767: {
768: $template .=
769: "<table bgcolor='#337733' cellspacing='1' cellpadding='1' border='0'><tr>".
770: "<td bgcolor='#448844'><a href=\"$link\"><font color='#FFFFFF' size='2'>$text</font></a>";
771: }
772:
773: # Add the graphic
774: my $title = &mt('View the FAQ');
775: $template .= <<"ENDTEMPLATE";
776: <a href="$link" title="$title"><image src="/adm/lonMisc/smallFAQ.gif" border="0" alt="(FAQ: $topic)" /></a>
777: ENDTEMPLATE
778: if ($text ne '') { $template.='</td></tr></table>' };
779: return $template;
780:
781: }
782:
783: ###############################################################
784: ###############################################################
785:
786: =pod
787:
788: =item * csv_translate($text)
789:
790: Translate $text to allow it to be output as a 'comma separated values'
791: format.
792:
793: =cut
794:
795: ###############################################################
796: ###############################################################
797: sub csv_translate {
798: my $text = shift;
799: $text =~ s/\"/\"\"/g;
800: $text =~ s/\n//g;
801: return $text;
802: }
803:
804:
805: ###############################################################
806: ###############################################################
807:
808: =pod
809:
810: =item * define_excel_formats
811:
812: Define some commonly used Excel cell formats.
813:
814: Currently supported formats:
815:
816: =over 4
817:
818: =item header
819:
820: =item bold
821:
822: =item h1
823:
824: =item h2
825:
826: =item h3
827:
828: =item date
829:
830: =back
831:
832: Inputs: $workbook
833:
834: Returns: $format, a hash reference.
835:
836: =cut
837:
838: ###############################################################
839: ###############################################################
840: sub define_excel_formats {
841: my ($workbook) = @_;
842: my $format;
843: $format->{'header'} = $workbook->add_format(bold => 1,
844: bottom => 1,
845: align => 'center');
846: $format->{'bold'} = $workbook->add_format(bold=>1);
847: $format->{'h1'} = $workbook->add_format(bold=>1, size=>18);
848: $format->{'h2'} = $workbook->add_format(bold=>1, size=>16);
849: $format->{'h3'} = $workbook->add_format(bold=>1, size=>14);
850: $format->{'date'} = $workbook->add_format(num_format=>
851: 'mmm d yyyy hh:mm AM/PM');
852: return $format;
853: }
854:
855: ###############################################################
856: ###############################################################
857:
858: =pod
859:
860: =item * change_content_javascript():
861:
862: This and the next function allow you to create small sections of an
863: otherwise static HTML page that you can update on the fly with
864: Javascript, even in Netscape 4.
865:
866: The Javascript fragment returned by this function (no E<lt>scriptE<gt> tag)
867: must be written to the HTML page once. It will prove the Javascript
868: function "change(name, content)". Calling the change function with the
869: name of the section
870: you want to update, matching the name passed to C<changable_area>, and
871: the new content you want to put in there, will put the content into
872: that area.
873:
874: B<Note>: Netscape 4 only reserves enough space for the changable area
875: to contain room for the original contents. You need to "make space"
876: for whatever changes you wish to make, and be B<sure> to check your
877: code in Netscape 4. This feature in Netscape 4 is B<not> powerful;
878: it's adequate for updating a one-line status display, but little more.
879: This script will set the space to 100% width, so you only need to
880: worry about height in Netscape 4.
881:
882: Modern browsers are much less limiting, and if you can commit to the
883: user not using Netscape 4, this feature may be used freely with
884: pretty much any HTML.
885:
886: =cut
887:
888: sub change_content_javascript {
889: # If we're on Netscape 4, we need to use Layer-based code
890: if ($ENV{'browser.type'} eq 'netscape' &&
891: $ENV{'browser.version'} =~ /^4\./) {
892: return (<<NETSCAPE4);
893: function change(name, content) {
894: doc = document.layers[name+"___escape"].layers[0].document;
895: doc.open();
896: doc.write(content);
897: doc.close();
898: }
899: NETSCAPE4
900: } else {
901: # Otherwise, we need to use semi-standards-compliant code
902: # (technically, "innerHTML" isn't standard but the equivalent
903: # is really scary, and every useful browser supports it
904: return (<<DOMBASED);
905: function change(name, content) {
906: element = document.getElementById(name);
907: element.innerHTML = content;
908: }
909: DOMBASED
910: }
911: }
912:
913: =pod
914:
915: =item * changable_area($name, $origContent):
916:
917: This provides a "changable area" that can be modified on the fly via
918: the Javascript code provided in C<change_content_javascript>. $name is
919: the name you will use to reference the area later; do not repeat the
920: same name on a given HTML page more then once. $origContent is what
921: the area will originally contain, which can be left blank.
922:
923: =cut
924:
925: sub changable_area {
926: my ($name, $origContent) = @_;
927:
928: if ($ENV{'browser.type'} eq 'netscape' &&
929: $ENV{'browser.version'} =~ /^4\./) {
930: # If this is netscape 4, we need to use the Layer tag
931: return "<ilayer width='100%' id='${name}___escape' overflow='none'><layer width='100%' id='$name' overflow='none'>$origContent</layer></ilayer>";
932: } else {
933: return "<span id='$name'>$origContent</span>";
934: }
935: }
936:
937: =pod
938:
939: =back
940:
941: =cut
942:
943: ###############################################################
944: ## Home server <option> list generating code ##
945: ###############################################################
946:
947: =pod
948:
949: =head1 Home Server option list generating code
950:
951: =over 4
952:
953: =item * get_domains()
954:
955: Returns an array containing each of the domains listed in the hosts.tab
956: file.
957:
958: =cut
959:
960: #-------------------------------------------
961: sub get_domains {
962: # The code below was stolen from "The Perl Cookbook", p 102, 1st ed.
963: my @domains;
964: my %seen;
965: foreach (sort values(%Apache::lonnet::hostdom)) {
966: push (@domains,$_) unless $seen{$_}++;
967: }
968: return @domains;
969: }
970:
971: # ------------------------------------------
972:
973: sub domain_select {
974: my ($name,$value,$multiple)=@_;
975: my %domains=map {
976: $_ => $_.' '.$Apache::lonnet::domaindescription{$_}
977: } &get_domains;
978: if ($multiple) {
979: $domains{''}=&mt('Any domain');
980: return &multiple_select_form($name,$value,4,%domains);
981: } else {
982: return &select_form($name,$value,%domains);
983: }
984: }
985:
986: sub multiple_select_form {
987: my ($name,$value,$size,%hash)=@_;
988: my %selected = map { $_ => 1 } ref($value)?@{$value}:($value);
989: my $output='';
990: if (! defined($size)) {
991: $size = 4;
992: if (scalar(keys(%hash))<4) {
993: $size = scalar(keys(%hash));
994: }
995: }
996: $output.="\n<select name='$name' size='$size' multiple='1'>";
997: foreach (sort(keys(%hash))) {
998: $output.='<option value="'.$_.'" ';
999: $output.='selected ' if ($selected{$_});
1000: $output.='>'.$hash{$_}."</option>\n";
1001: }
1002: $output.="</select>\n";
1003: return $output;
1004: }
1005:
1006: #-------------------------------------------
1007:
1008: =pod
1009:
1010: =item * select_form($defdom,$name,%hash)
1011:
1012: Returns a string containing a <select name='$name' size='1'> form to
1013: allow a user to select options from a hash option_name => displayed text.
1014: See lonrights.pm for an example invocation and use.
1015:
1016: =cut
1017:
1018: #-------------------------------------------
1019: sub select_form {
1020: my ($def,$name,%hash) = @_;
1021: my $selectform = "<select name=\"$name\" size=\"1\">\n";
1022: my @keys;
1023: if (exists($hash{'select_form_order'})) {
1024: @keys=@{$hash{'select_form_order'}};
1025: } else {
1026: @keys=sort(keys(%hash));
1027: }
1028: foreach (@keys) {
1029: $selectform.="<option value=\"$_\" ".
1030: ($_ eq $def ? 'selected' : '').
1031: ">".&mt($hash{$_})."</option>\n";
1032: }
1033: $selectform.="</select>";
1034: return $selectform;
1035: }
1036:
1037: sub gradeleveldescription {
1038: my $gradelevel=shift;
1039: my %gradelevels=(0 => 'Not specified',
1040: 1 => 'Grade 1',
1041: 2 => 'Grade 2',
1042: 3 => 'Grade 3',
1043: 4 => 'Grade 4',
1044: 5 => 'Grade 5',
1045: 6 => 'Grade 6',
1046: 7 => 'Grade 7',
1047: 8 => 'Grade 8',
1048: 9 => 'Grade 9',
1049: 10 => 'Grade 10',
1050: 11 => 'Grade 11',
1051: 12 => 'Grade 12',
1052: 13 => 'Grade 13',
1053: 14 => '100 Level',
1054: 15 => '200 Level',
1055: 16 => '300 Level',
1056: 17 => '400 Level',
1057: 18 => 'Graduate Level');
1058: return &mt($gradelevels{$gradelevel});
1059: }
1060:
1061: sub select_level_form {
1062: my ($deflevel,$name)=@_;
1063: unless ($deflevel) { $deflevel=0; }
1064: my $selectform = "<select name=\"$name\" size=\"1\">\n";
1065: for (my $i=0; $i<=18; $i++) {
1066: $selectform.="<option value=\"$i\" ".
1067: ($i==$deflevel ? 'selected' : '').
1068: ">".&gradeleveldescription($i)."</option>\n";
1069: }
1070: $selectform.="</select>";
1071: return $selectform;
1072: }
1073:
1074: #-------------------------------------------
1075:
1076: =pod
1077:
1078: =item * select_dom_form($defdom,$name,$includeempty)
1079:
1080: Returns a string containing a <select name='$name' size='1'> form to
1081: allow a user to select the domain to preform an operation in.
1082: See loncreateuser.pm for an example invocation and use.
1083:
1084: If the $includeempty flag is set, it also includes an empty choice ("no domain
1085: selected");
1086:
1087: =cut
1088:
1089: #-------------------------------------------
1090: sub select_dom_form {
1091: my ($defdom,$name,$includeempty) = @_;
1092: my @domains = get_domains();
1093: if ($includeempty) { @domains=('',@domains); }
1094: my $selectdomain = "<select name=\"$name\" size=\"1\">\n";
1095: foreach (@domains) {
1096: $selectdomain.="<option value=\"$_\" ".
1097: ($_ eq $defdom ? 'selected' : '').
1098: ">$_</option>\n";
1099: }
1100: $selectdomain.="</select>";
1101: return $selectdomain;
1102: }
1103:
1104: #-------------------------------------------
1105:
1106: =pod
1107:
1108: =item * get_library_servers($domain)
1109:
1110: Returns a hash which contains keys like '103l3' and values like
1111: 'kirk.lite.msu.edu'. All of the keys will be for machines in the
1112: given $domain.
1113:
1114: =cut
1115:
1116: #-------------------------------------------
1117: sub get_library_servers {
1118: my $domain = shift;
1119: my %library_servers;
1120: foreach (keys(%Apache::lonnet::libserv)) {
1121: if ($Apache::lonnet::hostdom{$_} eq $domain) {
1122: $library_servers{$_} = $Apache::lonnet::hostname{$_};
1123: }
1124: }
1125: return %library_servers;
1126: }
1127:
1128: #-------------------------------------------
1129:
1130: =pod
1131:
1132: =item * home_server_option_list($domain)
1133:
1134: returns a string which contains an <option> list to be used in a
1135: <select> form input. See loncreateuser.pm for an example.
1136:
1137: =cut
1138:
1139: #-------------------------------------------
1140: sub home_server_option_list {
1141: my $domain = shift;
1142: my %servers = &get_library_servers($domain);
1143: my $result = '';
1144: foreach (sort keys(%servers)) {
1145: $result.=
1146: '<option value="'.$_.'">'.$_.' '.$servers{$_}."</option>\n";
1147: }
1148: return $result;
1149: }
1150:
1151: =pod
1152:
1153: =back
1154:
1155: =cut
1156:
1157: ###############################################################
1158: ## Decoding User Agent ##
1159: ###############################################################
1160:
1161: =pod
1162:
1163: =head1 Decoding the User Agent
1164:
1165: =over 4
1166:
1167: =item * &decode_user_agent()
1168:
1169: Inputs: $r
1170:
1171: Outputs:
1172:
1173: =over 4
1174:
1175: =item * $httpbrowser
1176:
1177: =item * $clientbrowser
1178:
1179: =item * $clientversion
1180:
1181: =item * $clientmathml
1182:
1183: =item * $clientunicode
1184:
1185: =item * $clientos
1186:
1187: =back
1188:
1189: =back
1190:
1191: =cut
1192:
1193: ###############################################################
1194: ###############################################################
1195: sub decode_user_agent {
1196: my @browsertype=split(/\&/,$Apache::lonnet::perlvar{"lonBrowsDet"});
1197: my %mathcap=split(/\&/,$$Apache::lonnet::perlvar{"lonMathML"});
1198: my $httpbrowser=$ENV{"HTTP_USER_AGENT"};
1199: my $clientbrowser='unknown';
1200: my $clientversion='0';
1201: my $clientmathml='';
1202: my $clientunicode='0';
1203: for (my $i=0;$i<=$#browsertype;$i++) {
1204: my ($bname,$match,$notmatch,$vreg,$minv,$univ)=split(/\:/,$browsertype[$i]);
1205: if (($httpbrowser=~/$match/i) && ($httpbrowser!~/$notmatch/i)) {
1206: $clientbrowser=$bname;
1207: $httpbrowser=~/$vreg/i;
1208: $clientversion=$1;
1209: $clientmathml=($clientversion>=$minv);
1210: $clientunicode=($clientversion>=$univ);
1211: }
1212: }
1213: my $clientos='unknown';
1214: if (($httpbrowser=~/linux/i) ||
1215: ($httpbrowser=~/unix/i) ||
1216: ($httpbrowser=~/ux/i) ||
1217: ($httpbrowser=~/solaris/i)) { $clientos='unix'; }
1218: if (($httpbrowser=~/vax/i) ||
1219: ($httpbrowser=~/vms/i)) { $clientos='vms'; }
1220: if ($httpbrowser=~/next/i) { $clientos='next'; }
1221: if (($httpbrowser=~/mac/i) ||
1222: ($httpbrowser=~/powerpc/i)) { $clientos='mac'; }
1223: if ($httpbrowser=~/win/i) { $clientos='win'; }
1224: if ($httpbrowser=~/embed/i) { $clientos='pda'; }
1225: return ($httpbrowser,$clientbrowser,$clientversion,$clientmathml,
1226: $clientunicode,$clientos,);
1227: }
1228:
1229: ###############################################################
1230: ## Authentication changing form generation subroutines ##
1231: ###############################################################
1232: ##
1233: ## All of the authform_xxxxxxx subroutines take their inputs in a
1234: ## hash, and have reasonable default values.
1235: ##
1236: ## formname = the name given in the <form> tag.
1237: #-------------------------------------------
1238:
1239: =pod
1240:
1241: =head1 Authentication Routines
1242:
1243: =over 4
1244:
1245: =item * authform_xxxxxx
1246:
1247: The authform_xxxxxx subroutines provide javascript and html forms which
1248: handle some of the conveniences required for authentication forms.
1249: This is not an optimal method, but it works.
1250:
1251: See loncreateuser.pm for invocation and use examples.
1252:
1253: =over 4
1254:
1255: =item * authform_header
1256:
1257: =item * authform_authorwarning
1258:
1259: =item * authform_nochange
1260:
1261: =item * authform_kerberos
1262:
1263: =item * authform_internal
1264:
1265: =item * authform_filesystem
1266:
1267: =back
1268:
1269: =back
1270:
1271: =cut
1272:
1273: #-------------------------------------------
1274: sub authform_header{
1275: my %in = (
1276: formname => 'cu',
1277: kerb_def_dom => '',
1278: @_,
1279: );
1280: $in{'formname'} = 'document.' . $in{'formname'};
1281: my $result='';
1282:
1283: #---------------------------------------------- Code for upper case translation
1284: my $Javascript_toUpperCase;
1285: unless ($in{kerb_def_dom}) {
1286: $Javascript_toUpperCase =<<"END";
1287: switch (choice) {
1288: case 'krb': currentform.elements[choicearg].value =
1289: currentform.elements[choicearg].value.toUpperCase();
1290: break;
1291: default:
1292: }
1293: END
1294: } else {
1295: $Javascript_toUpperCase = "";
1296: }
1297:
1298: my $radioval = "'nochange'";
1299: if (exists($in{'curr_authtype'}) &&
1300: defined($in{'curr_authtype'}) &&
1301: $in{'curr_authtype'} ne '') {
1302: $radioval = "'$in{'curr_authtype'}arg'";
1303: }
1304: my $argfield = 'null';
1305: if ( grep/^mode$/,(keys %in) ) {
1306: if ($in{'mode'} eq 'modifycourse') {
1307: if ( grep/^curr_authtype$/,(keys %in) ) {
1308: $radioval = "'$in{'curr_authtype'}'";
1309: }
1310: if ( grep/^curr_autharg$/,(keys %in) ) {
1311: unless ($in{'curr_autharg'} eq '') {
1312: $argfield = "'$in{'curr_autharg'}'";
1313: }
1314: }
1315: }
1316: }
1317:
1318: $result.=<<"END";
1319: var current = new Object();
1320: current.radiovalue = $radioval;
1321: current.argfield = $argfield;
1322:
1323: function changed_radio(choice,currentform) {
1324: var choicearg = choice + 'arg';
1325: // If a radio button in changed, we need to change the argfield
1326: if (current.radiovalue != choice) {
1327: current.radiovalue = choice;
1328: if (current.argfield != null) {
1329: currentform.elements[current.argfield].value = '';
1330: }
1331: if (choice == 'nochange') {
1332: current.argfield = null;
1333: } else {
1334: current.argfield = choicearg;
1335: switch(choice) {
1336: case 'krb':
1337: currentform.elements[current.argfield].value =
1338: "$in{'kerb_def_dom'}";
1339: break;
1340: default:
1341: break;
1342: }
1343: }
1344: }
1345: return;
1346: }
1347:
1348: function changed_text(choice,currentform) {
1349: var choicearg = choice + 'arg';
1350: if (currentform.elements[choicearg].value !='') {
1351: $Javascript_toUpperCase
1352: // clear old field
1353: if ((current.argfield != choicearg) && (current.argfield != null)) {
1354: currentform.elements[current.argfield].value = '';
1355: }
1356: current.argfield = choicearg;
1357: }
1358: set_auth_radio_buttons(choice,currentform);
1359: return;
1360: }
1361:
1362: function set_auth_radio_buttons(newvalue,currentform) {
1363: var i=0;
1364: while (i < currentform.login.length) {
1365: if (currentform.login[i].value == newvalue) { break; }
1366: i++;
1367: }
1368: if (i == currentform.login.length) {
1369: return;
1370: }
1371: current.radiovalue = newvalue;
1372: currentform.login[i].checked = true;
1373: return;
1374: }
1375: END
1376: return $result;
1377: }
1378:
1379: sub authform_authorwarning{
1380: my $result='';
1381: $result='<i>'.
1382: &mt('As a general rule, only authors or co-authors should be '.
1383: 'filesystem authenticated '.
1384: '(which allows access to the server filesystem).')."</i>\n";
1385: return $result;
1386: }
1387:
1388: sub authform_nochange{
1389: my %in = (
1390: formname => 'document.cu',
1391: kerb_def_dom => 'MSU.EDU',
1392: @_,
1393: );
1394: my $result = &mt('[_1] Do not change login data',
1395: '<input type="radio" name="login" value="nochange" '.
1396: 'checked="checked" onclick="'.
1397: "javascript:changed_radio('nochange',$in{'formname'});".'" />');
1398: return $result;
1399: }
1400:
1401: sub authform_kerberos{
1402: my %in = (
1403: formname => 'document.cu',
1404: kerb_def_dom => 'MSU.EDU',
1405: kerb_def_auth => 'krb4',
1406: @_,
1407: );
1408: my ($check4,$check5,$krbarg);
1409: if ($in{'kerb_def_auth'} eq 'krb5') {
1410: $check5 = " checked=\"on\"";
1411: } else {
1412: $check4 = " checked=\"on\"";
1413: }
1414: $krbarg = $in{'kerb_def_dom'};
1415:
1416: my $krbcheck = "";
1417: if ( grep/^curr_authtype$/,(keys %in) ) {
1418: if ($in{'curr_authtype'} =~ m/^krb/) {
1419: $krbcheck = " checked=\"on\"";
1420: if ( grep/^curr_autharg$/,(keys %in) ) {
1421: $krbarg = $in{'curr_autharg'};
1422: }
1423: }
1424: }
1425:
1426: my $jscall = "javascript:changed_radio('krb',$in{'formname'});";
1427: my $result .= &mt
1428: ('[_1] Kerberos authenticated with domain [_2] '.
1429: '[_3] Version 4 [_4] Version 5',
1430: '<input type="radio" name="login" value="krb" '.
1431: 'onclick="'.$jscall.'" onchange="'.$jscall.'"'.$krbcheck.' />',
1432: '<input type="text" size="10" name="krbarg" '.
1433: 'value="'.$krbarg.'" '.
1434: 'onchange="'.$jscall.'" />',
1435: '<input type="radio" name="krbver" value="4" '.$check4.' />',
1436: '<input type="radio" name="krbver" value="5" '.$check5.' />');
1437: return $result;
1438: }
1439:
1440: sub authform_internal{
1441: my %args = (
1442: formname => 'document.cu',
1443: kerb_def_dom => 'MSU.EDU',
1444: @_,
1445: );
1446:
1447: my $intcheck = "";
1448: my $intarg = 'value=""';
1449: if ( grep/^curr_authtype$/,(keys %args) ) {
1450: if ($args{'curr_authtype'} eq 'int') {
1451: $intcheck = " checked=\"on\"";
1452: if ( grep/^curr_autharg$/,(keys %args) ) {
1453: $intarg = "value=\"$args{'curr_autharg'}\"";
1454: }
1455: }
1456: }
1457:
1458: my $jscall = "javascript:changed_radio('int',$args{'formname'});";
1459: my $result.=&mt
1460: ('[_1] Internally authenticated (with initial password [_2])',
1461: '<input type="radio" name="login" value="int" '.$intcheck.
1462: ' onchange="'.$jscall.'" onclick="'.$jscall.'" />',
1463: '<input type="text" size="10" name="intarg" '.$intarg.
1464: ' onchange="'.$jscall.'" />');
1465: return $result;
1466: }
1467:
1468: sub authform_local{
1469: my %in = (
1470: formname => 'document.cu',
1471: kerb_def_dom => 'MSU.EDU',
1472: @_,
1473: );
1474:
1475: my $loccheck = "";
1476: my $locarg = 'value=""';
1477: if ( grep/^curr_authtype$/,(keys %in) ) {
1478: if ($in{'curr_authtype'} eq 'loc') {
1479: $loccheck = " checked=\"on\"";
1480: if ( grep/^curr_autharg$/,(keys %in) ) {
1481: $locarg = "value=\"$in{'curr_autharg'}\"";
1482: }
1483: }
1484: }
1485:
1486: my $jscall = "javascript:changed_radio('loc',$in{'formname'});";
1487: my $result.=&mt('[_1] Local Authentication with argument [_2]',
1488: '<input type="radio" name="login" value="loc" '.$loccheck.
1489: ' onchange="'.$jscall.'" onclick="'.$jscall.'" />',
1490: '<input type="text" size="10" name="locarg" '.$locarg.
1491: ' onchange="'.$jscall.'" />');
1492: return $result;
1493: }
1494:
1495: sub authform_filesystem{
1496: my %in = (
1497: formname => 'document.cu',
1498: kerb_def_dom => 'MSU.EDU',
1499: @_,
1500: );
1501: my $jscall = "javascript:changed_radio('fsys',$in{'formname'});";
1502: my $result.= &mt
1503: ('[_1] Filesystem Authenticated (with initial password [_2])',
1504: '<input type="radio" name="login" value="fsys" '.
1505: 'onchange="'.$jscall.'" onclick="'.$jscall.'" />',
1506: '<input type="text" size="10" name="fsysarg" value="" '.
1507: 'onchange="'.$jscall.'" />');
1508: return $result;
1509: }
1510:
1511: ###############################################################
1512: ## Get Authentication Defaults for Domain ##
1513: ###############################################################
1514:
1515: =pod
1516:
1517: =head1 Domains and Authentication
1518:
1519: Returns default authentication type and an associated argument as
1520: listed in file 'domain.tab'.
1521:
1522: =over 4
1523:
1524: =item * get_auth_defaults
1525:
1526: get_auth_defaults($target_domain) returns the default authentication
1527: type and an associated argument (initial password or a kerberos domain).
1528: These values are stored in lonTabs/domain.tab
1529:
1530: ($def_auth, $def_arg) = &get_auth_defaults($target_domain);
1531:
1532: If target_domain is not found in domain.tab, returns nothing ('').
1533:
1534: =cut
1535:
1536: #-------------------------------------------
1537: sub get_auth_defaults {
1538: my $domain=shift;
1539: return ($Apache::lonnet::domain_auth_def{$domain},$Apache::lonnet::domain_auth_arg_def{$domain});
1540: }
1541: ###############################################################
1542: ## End Get Authentication Defaults for Domain ##
1543: ###############################################################
1544:
1545: ###############################################################
1546: ## Get Kerberos Defaults for Domain ##
1547: ###############################################################
1548: ##
1549: ## Returns default kerberos version and an associated argument
1550: ## as listed in file domain.tab. If not listed, provides
1551: ## appropriate default domain and kerberos version.
1552: ##
1553: #-------------------------------------------
1554:
1555: =pod
1556:
1557: =item * get_kerberos_defaults
1558:
1559: get_kerberos_defaults($target_domain) returns the default kerberos
1560: version and domain. If not found in domain.tabs, it defaults to
1561: version 4 and the domain of the server.
1562:
1563: ($def_version, $def_krb_domain) = &get_kerberos_defaults($target_domain);
1564:
1565: =cut
1566:
1567: #-------------------------------------------
1568: sub get_kerberos_defaults {
1569: my $domain=shift;
1570: my ($krbdef,$krbdefdom) =
1571: &Apache::loncommon::get_auth_defaults($domain);
1572: unless ($krbdef =~/^krb/ && $krbdefdom) {
1573: $ENV{'SERVER_NAME'}=~/(\w+\.\w+)$/;
1574: my $krbdefdom=$1;
1575: $krbdefdom=~tr/a-z/A-Z/;
1576: $krbdef = "krb4";
1577: }
1578: return ($krbdef,$krbdefdom);
1579: }
1580:
1581: =pod
1582:
1583: =back
1584:
1585: =cut
1586:
1587: ###############################################################
1588: ## Thesaurus Functions ##
1589: ###############################################################
1590:
1591: =pod
1592:
1593: =head1 Thesaurus Functions
1594:
1595: =over 4
1596:
1597: =item * initialize_keywords
1598:
1599: Initializes the package variable %Keywords if it is empty. Uses the
1600: package variable $thesaurus_db_file.
1601:
1602: =cut
1603:
1604: ###################################################
1605:
1606: sub initialize_keywords {
1607: return 1 if (scalar keys(%Keywords));
1608: # If we are here, %Keywords is empty, so fill it up
1609: # Make sure the file we need exists...
1610: if (! -e $thesaurus_db_file) {
1611: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file".
1612: " failed because it does not exist");
1613: return 0;
1614: }
1615: # Set up the hash as a database
1616: my %thesaurus_db;
1617: if (! tie(%thesaurus_db,'GDBM_File',
1618: $thesaurus_db_file,&GDBM_READER(),0640)){
1619: &Apache::lonnet::logthis("Could not tie \%thesaurus_db to ".
1620: $thesaurus_db_file);
1621: return 0;
1622: }
1623: # Get the average number of appearances of a word.
1624: my $avecount = $thesaurus_db{'average.count'};
1625: # Put keywords (those that appear > average) into %Keywords
1626: while (my ($word,$data)=each (%thesaurus_db)) {
1627: my ($count,undef) = split /:/,$data;
1628: $Keywords{$word}++ if ($count > $avecount);
1629: }
1630: untie %thesaurus_db;
1631: # Remove special values from %Keywords.
1632: foreach ('total.count','average.count') {
1633: delete($Keywords{$_}) if (exists($Keywords{$_}));
1634: }
1635: return 1;
1636: }
1637:
1638: ###################################################
1639:
1640: =pod
1641:
1642: =item * keyword($word)
1643:
1644: Returns true if $word is a keyword. A keyword is a word that appears more
1645: than the average number of times in the thesaurus database. Calls
1646: &initialize_keywords
1647:
1648: =cut
1649:
1650: ###################################################
1651:
1652: sub keyword {
1653: return if (!&initialize_keywords());
1654: my $word=lc(shift());
1655: $word=~s/\W//g;
1656: return exists($Keywords{$word});
1657: }
1658:
1659: ###############################################################
1660:
1661: =pod
1662:
1663: =item * get_related_words
1664:
1665: Look up a word in the thesaurus. Takes a scalar argument and returns
1666: an array of words. If the keyword is not in the thesaurus, an empty array
1667: will be returned. The order of the words returned is determined by the
1668: database which holds them.
1669:
1670: Uses global $thesaurus_db_file.
1671:
1672: =cut
1673:
1674: ###############################################################
1675: sub get_related_words {
1676: my $keyword = shift;
1677: my %thesaurus_db;
1678: if (! -e $thesaurus_db_file) {
1679: &Apache::lonnet::logthis("Attempt to access $thesaurus_db_file ".
1680: "failed because the file does not exist");
1681: return ();
1682: }
1683: if (! tie(%thesaurus_db,'GDBM_File',
1684: $thesaurus_db_file,&GDBM_READER(),0640)){
1685: return ();
1686: }
1687: my @Words=();
1688: if (exists($thesaurus_db{$keyword})) {
1689: $_ = $thesaurus_db{$keyword};
1690: (undef,@Words) = split/:/; # The first element is the number of times
1691: # the word appears. We do not need it now.
1692: for (my $i=0;$i<=$#Words;$i++) {
1693: ($Words[$i],undef)= split/\,/,$Words[$i];
1694: }
1695: }
1696: untie %thesaurus_db;
1697: return @Words;
1698: }
1699:
1700: =pod
1701:
1702: =back
1703:
1704: =cut
1705:
1706: # -------------------------------------------------------------- Plaintext name
1707: =pod
1708:
1709: =head1 User Name Functions
1710:
1711: =over 4
1712:
1713: =item * plainname($uname,$udom)
1714:
1715: Takes a users logon name and returns it as a string in
1716: "first middle last generation" form
1717:
1718: =cut
1719:
1720: ###############################################################
1721: sub plainname {
1722: my ($uname,$udom)=@_;
1723: my %names=&Apache::lonnet::get('environment',
1724: ['firstname','middlename','lastname','generation'],
1725: $udom,$uname);
1726: my $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
1727: $names{'lastname'}.' '.$names{'generation'};
1728: $name=~s/\s+$//;
1729: $name=~s/\s+/ /g;
1730: if ($name !~ /\S/) { $name=$uname.'@'.$udom; }
1731: return $name;
1732: }
1733:
1734: # -------------------------------------------------------------------- Nickname
1735: =pod
1736:
1737: =item * nickname($uname,$udom)
1738:
1739: Gets a users name and returns it as a string as
1740:
1741: ""nickname""
1742:
1743: if the user has a nickname or
1744:
1745: "first middle last generation"
1746:
1747: if the user does not
1748:
1749: =cut
1750:
1751: sub nickname {
1752: my ($uname,$udom)=@_;
1753: my %names=&Apache::lonnet::get('environment',
1754: ['nickname','firstname','middlename','lastname','generation'],$udom,$uname);
1755: my $name=$names{'nickname'};
1756: if ($name) {
1757: $name='"'.$name.'"';
1758: } else {
1759: $name=$names{'firstname'}.' '.$names{'middlename'}.' '.
1760: $names{'lastname'}.' '.$names{'generation'};
1761: $name=~s/\s+$//;
1762: $name=~s/\s+/ /g;
1763: }
1764: return $name;
1765: }
1766:
1767:
1768: # ------------------------------------------------------------------ Screenname
1769:
1770: =pod
1771:
1772: =item * screenname($uname,$udom)
1773:
1774: Gets a users screenname and returns it as a string
1775:
1776: =cut
1777:
1778: sub screenname {
1779: my ($uname,$udom)=@_;
1780: my %names=
1781: &Apache::lonnet::get('environment',['screenname'],$udom,$uname);
1782: return $names{'screenname'};
1783: }
1784:
1785: # ------------------------------------------------------------- Message Wrapper
1786:
1787: sub messagewrapper {
1788: my ($link,$un,$do)=@_;
1789: return
1790: "<a href='/adm/email?compose=individual&recname=$un&recdom=$do'>$link</a>";
1791: }
1792: # --------------------------------------------------------------- Notes Wrapper
1793:
1794: sub noteswrapper {
1795: my ($link,$un,$do)=@_;
1796: return
1797: "<a href='/adm/email?recordftf=retrieve&recname=$un&recdom=$do'>$link</a>";
1798: }
1799: # ------------------------------------------------------------- Aboutme Wrapper
1800:
1801: sub aboutmewrapper {
1802: my ($link,$username,$domain,$target)=@_;
1803: return "<a href='/adm/$domain/$username/aboutme'".
1804: ($target?" target='$target'":'').">$link</a>";
1805: }
1806:
1807: # ------------------------------------------------------------ Syllabus Wrapper
1808:
1809:
1810: sub syllabuswrapper {
1811: my ($linktext,$coursedir,$domain,$fontcolor)=@_;
1812: if ($fontcolor) {
1813: $linktext='<font color="'.$fontcolor.'">'.$linktext.'</font>';
1814: }
1815: return "<a href='/public/$domain/$coursedir/syllabus'>$linktext</a>";
1816: }
1817:
1818: =pod
1819:
1820: =back
1821:
1822: =head1 Access .tab File Data
1823:
1824: =over 4
1825:
1826: =item * languageids()
1827:
1828: returns list of all language ids
1829:
1830: =cut
1831:
1832: sub languageids {
1833: return sort(keys(%language));
1834: }
1835:
1836: =pod
1837:
1838: =item * languagedescription()
1839:
1840: returns description of a specified language id
1841:
1842: =cut
1843:
1844: sub languagedescription {
1845: my $code=shift;
1846: return ($supported_language{$code}?'* ':'').
1847: $language{$code}.
1848: ($supported_language{$code}?' ('.&mt('interface available').')':'');
1849: }
1850:
1851: sub plainlanguagedescription {
1852: my $code=shift;
1853: return $language{$code};
1854: }
1855:
1856: sub supportedlanguagecode {
1857: my $code=shift;
1858: return $supported_language{$code};
1859: }
1860:
1861: =pod
1862:
1863: =item * copyrightids()
1864:
1865: returns list of all copyrights
1866:
1867: =cut
1868:
1869: sub copyrightids {
1870: return sort(keys(%cprtag));
1871: }
1872:
1873: =pod
1874:
1875: =item * copyrightdescription()
1876:
1877: returns description of a specified copyright id
1878:
1879: =cut
1880:
1881: sub copyrightdescription {
1882: return &mt($cprtag{shift(@_)});
1883: }
1884:
1885: =pod
1886:
1887: =item * source_copyrightids()
1888:
1889: returns list of all source copyrights
1890:
1891: =cut
1892:
1893: sub source_copyrightids {
1894: return sort(keys(%scprtag));
1895: }
1896:
1897: =pod
1898:
1899: =item * source_copyrightdescription()
1900:
1901: returns description of a specified source copyright id
1902:
1903: =cut
1904:
1905: sub source_copyrightdescription {
1906: return &mt($scprtag{shift(@_)});
1907: }
1908:
1909: =pod
1910:
1911: =item * filecategories()
1912:
1913: returns list of all file categories
1914:
1915: =cut
1916:
1917: sub filecategories {
1918: return sort(keys(%category_extensions));
1919: }
1920:
1921: =pod
1922:
1923: =item * filecategorytypes()
1924:
1925: returns list of file types belonging to a given file
1926: category
1927:
1928: =cut
1929:
1930: sub filecategorytypes {
1931: return @{$category_extensions{lc($_[0])}};
1932: }
1933:
1934: =pod
1935:
1936: =item * fileembstyle()
1937:
1938: returns embedding style for a specified file type
1939:
1940: =cut
1941:
1942: sub fileembstyle {
1943: return $fe{lc(shift(@_))};
1944: }
1945:
1946:
1947: sub filecategoryselect {
1948: my ($name,$value)=@_;
1949: return &select_form($value,$name,
1950: '' => &mt('Any category'),
1951: map { $_,$_ } sort(keys(%category_extensions)));
1952: }
1953:
1954: =pod
1955:
1956: =item * filedescription()
1957:
1958: returns description for a specified file type
1959:
1960: =cut
1961:
1962: sub filedescription {
1963: my $file_description = $fd{lc(shift())};
1964: $file_description =~ s:([\[\]]):~$1:g;
1965: return &mt($file_description);
1966: }
1967:
1968: =pod
1969:
1970: =item * filedescriptionex()
1971:
1972: returns description for a specified file type with
1973: extra formatting
1974:
1975: =cut
1976:
1977: sub filedescriptionex {
1978: my $ex=shift;
1979: my $file_description = $fd{lc($ex)};
1980: $file_description =~ s:([\[\]]):~$1:g;
1981: return '.'.$ex.' '.&mt($file_description);
1982: }
1983:
1984: # End of .tab access
1985: =pod
1986:
1987: =back
1988:
1989: =cut
1990:
1991: # ------------------------------------------------------------------ File Types
1992: sub fileextensions {
1993: return sort(keys(%fe));
1994: }
1995:
1996: # ----------------------------------------------------------- Display Languages
1997: # returns a hash with all desired display languages
1998: #
1999:
2000: sub display_languages {
2001: my %languages=();
2002: foreach (&preferred_languages()) {
2003: $languages{$_}=1;
2004: }
2005: &get_unprocessed_cgi($ENV{'QUERY_STRING'},['displaylanguage']);
2006: if ($ENV{'form.displaylanguage'}) {
2007: foreach (split(/\s*(\,|\;|\:)\s*/,$ENV{'form.displaylanguage'})) {
2008: $languages{$_}=1;
2009: }
2010: }
2011: return %languages;
2012: }
2013:
2014: sub preferred_languages {
2015: my @languages=();
2016: if ($ENV{'course.'.$ENV{'request.course.id'}.'.languages'}) {
2017: @languages=(@languages,split(/\s*(\,|\;|\:)\s*/,
2018: $ENV{'course.'.$ENV{'request.course.id'}.'.languages'}));
2019: }
2020: if ($ENV{'environment.languages'}) {
2021: @languages=split(/\s*(\,|\;|\:)\s*/,$ENV{'environment.languages'});
2022: }
2023: my $browser=(split(/\;/,$ENV{'HTTP_ACCEPT_LANGUAGE'}))[0];
2024: if ($browser) {
2025: @languages=(@languages,split(/\s*(\,|\;|\:)\s*/,$browser));
2026: }
2027: if ($Apache::lonnet::domain_lang_def{$ENV{'user.domain'}}) {
2028: @languages=(@languages,
2029: $Apache::lonnet::domain_lang_def{$ENV{'user.domain'}});
2030: }
2031: if ($Apache::lonnet::domain_lang_def{$ENV{'request.role.domain'}}) {
2032: @languages=(@languages,
2033: $Apache::lonnet::domain_lang_def{$ENV{'request.role.domain'}});
2034: }
2035: if ($Apache::lonnet::domain_lang_def{
2036: $Apache::lonnet::perlvar{'lonDefDomain'}}) {
2037: @languages=(@languages,
2038: $Apache::lonnet::domain_lang_def{
2039: $Apache::lonnet::perlvar{'lonDefDomain'}});
2040: }
2041: # turn "en-ca" into "en-ca,en"
2042: my @genlanguages;
2043: foreach (@languages) {
2044: unless ($_=~/\w/) { next; }
2045: push (@genlanguages,$_);
2046: if ($_=~/(\-|\_)/) {
2047: push (@genlanguages,(split(/(\-|\_)/,$_))[0]);
2048: }
2049: }
2050: return @genlanguages;
2051: }
2052:
2053: ###############################################################
2054: ## Student Answer Attempts ##
2055: ###############################################################
2056:
2057: =pod
2058:
2059: =head1 Alternate Problem Views
2060:
2061: =over 4
2062:
2063: =item * get_previous_attempt($symb, $username, $domain, $course,
2064: $getattempt, $regexp, $gradesub)
2065:
2066: Return string with previous attempt on problem. Arguments:
2067:
2068: =over 4
2069:
2070: =item * $symb: Problem, including path
2071:
2072: =item * $username: username of the desired student
2073:
2074: =item * $domain: domain of the desired student
2075:
2076: =item * $course: Course ID
2077:
2078: =item * $getattempt: Leave blank for all attempts, otherwise put
2079: something
2080:
2081: =item * $regexp: if string matches this regexp, the string will be
2082: sent to $gradesub
2083:
2084: =item * $gradesub: routine that processes the string if it matches $regexp
2085:
2086: =back
2087:
2088: The output string is a table containing all desired attempts, if any.
2089:
2090: =cut
2091:
2092: sub get_previous_attempt {
2093: my ($symb,$username,$domain,$course,$getattempt,$regexp,$gradesub)=@_;
2094: my $prevattempts='';
2095: no strict 'refs';
2096: if ($symb) {
2097: my (%returnhash)=
2098: &Apache::lonnet::restore($symb,$course,$domain,$username);
2099: if ($returnhash{'version'}) {
2100: my %lasthash=();
2101: my $version;
2102: for ($version=1;$version<=$returnhash{'version'};$version++) {
2103: foreach (sort(split(/\:/,$returnhash{$version.':keys'}))) {
2104: $lasthash{$_}=$returnhash{$version.':'.$_};
2105: }
2106: }
2107: $prevattempts='<table border="0" width="100%"><tr><td bgcolor="#777777">';
2108: $prevattempts.='<table border="0" width="100%"><tr bgcolor="#e6ffff"><td>History</td>';
2109: foreach (sort(keys %lasthash)) {
2110: my ($ign,@parts) = split(/\./,$_);
2111: if ($#parts > 0) {
2112: my $data=$parts[-1];
2113: pop(@parts);
2114: $prevattempts.='<td>Part '.join('.',@parts).'<br />'.$data.' </td>';
2115: } else {
2116: if ($#parts == 0) {
2117: $prevattempts.='<th>'.$parts[0].'</th>';
2118: } else {
2119: $prevattempts.='<th>'.$ign.'</th>';
2120: }
2121: }
2122: }
2123: if ($getattempt eq '') {
2124: for ($version=1;$version<=$returnhash{'version'};$version++) {
2125: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Transaction '.$version.'</td>';
2126: foreach (sort(keys %lasthash)) {
2127: my $value;
2128: if ($_ =~ /timestamp/) {
2129: $value=scalar(localtime($returnhash{$version.':'.$_}));
2130: } else {
2131: $value=$returnhash{$version.':'.$_};
2132: }
2133: $prevattempts.='<td>'.&Apache::lonnet::unescape($value).' </td>';
2134: }
2135: }
2136: }
2137: $prevattempts.='</tr><tr bgcolor="#ffffe6"><td>Current</td>';
2138: foreach (sort(keys %lasthash)) {
2139: my $value;
2140: if ($_ =~ /timestamp/) {
2141: $value=scalar(localtime($lasthash{$_}));
2142: } else {
2143: $value=$lasthash{$_};
2144: }
2145: $value=&Apache::lonnet::unescape($value);
2146: if ($_ =~/$regexp$/ && (defined &$gradesub)) {$value = &$gradesub($value)}
2147: $prevattempts.='<td>'.$value.' </td>';
2148: }
2149: $prevattempts.='</tr></table></td></tr></table>';
2150: } else {
2151: $prevattempts='Nothing submitted - no attempts.';
2152: }
2153: } else {
2154: $prevattempts='No data.';
2155: }
2156: }
2157:
2158: sub relative_to_absolute {
2159: my ($url,$output)=@_;
2160: my $parser=HTML::TokeParser->new(\$output);
2161: my $token;
2162: my $thisdir=$url;
2163: my @rlinks=();
2164: while ($token=$parser->get_token) {
2165: if ($token->[0] eq 'S') {
2166: if ($token->[1] eq 'a') {
2167: if ($token->[2]->{'href'}) {
2168: $rlinks[$#rlinks+1]=$token->[2]->{'href'};
2169: }
2170: } elsif ($token->[1] eq 'img' || $token->[1] eq 'embed' ) {
2171: $rlinks[$#rlinks+1]=$token->[2]->{'src'};
2172: } elsif ($token->[1] eq 'base') {
2173: $thisdir=$token->[2]->{'href'};
2174: }
2175: }
2176: }
2177: $thisdir=~s-/[^/]*$--;
2178: foreach (@rlinks) {
2179: unless (($_=~/^http:\/\//i) ||
2180: ($_=~/^\//) ||
2181: ($_=~/^javascript:/i) ||
2182: ($_=~/^mailto:/i) ||
2183: ($_=~/^\#/)) {
2184: my $newlocation=&Apache::lonnet::hreflocation($thisdir,$_);
2185: $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
2186: }
2187: }
2188: # -------------------------------------------------- Deal with Applet codebases
2189: $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
2190: return $output;
2191: }
2192:
2193: =pod
2194:
2195: =item * get_student_view
2196:
2197: show a snapshot of what student was looking at
2198:
2199: =cut
2200:
2201: sub get_student_view {
2202: my ($symb,$username,$domain,$courseid,$target,$moreenv) = @_;
2203: my ($map,$id,$feedurl) = &Apache::lonnet::decode_symb($symb);
2204: my (%form);
2205: my @elements=('symb','courseid','domain','username');
2206: foreach my $element (@elements) {
2207: $form{'grade_'.$element}=eval '$'.$element #'
2208: }
2209: if (defined($moreenv)) {
2210: %form=(%form,%{$moreenv});
2211: }
2212: if ($target eq 'tex') {$form{'grade_target'} = 'tex';}
2213: $feedurl=&Apache::lonnet::clutter($feedurl);
2214: my $userview=&Apache::lonnet::ssi_body($feedurl,%form);
2215: $userview=~s/\<body[^\>]*\>//gi;
2216: $userview=~s/\<\/body\>//gi;
2217: $userview=~s/\<html\>//gi;
2218: $userview=~s/\<\/html\>//gi;
2219: $userview=~s/\<head\>//gi;
2220: $userview=~s/\<\/head\>//gi;
2221: $userview=~s/action\s*\=/would_be_action\=/gi;
2222: $userview=&relative_to_absolute($feedurl,$userview);
2223: return $userview;
2224: }
2225:
2226: =pod
2227:
2228: =item * get_student_answers()
2229:
2230: show a snapshot of how student was answering problem
2231:
2232: =cut
2233:
2234: sub get_student_answers {
2235: my ($symb,$username,$domain,$courseid,%form) = @_;
2236: my ($map,$id,$feedurl) = &Apache::lonnet::decode_symb($symb);
2237: my (%moreenv);
2238: my @elements=('symb','courseid','domain','username');
2239: foreach my $element (@elements) {
2240: $moreenv{'grade_'.$element}=eval '$'.$element #'
2241: }
2242: $moreenv{'grade_target'}='answer';
2243: %moreenv=(%form,%moreenv);
2244: my $userview=&Apache::lonnet::ssi('/res/'.$feedurl,%moreenv);
2245: return $userview;
2246: }
2247:
2248: =pod
2249:
2250: =item * &submlink()
2251:
2252: Inputs: $text $uname $udom $symb
2253:
2254: Returns: A link to grades.pm such as to see the SUBM view of a student
2255:
2256: =cut
2257:
2258: ###############################################
2259: sub submlink {
2260: my ($text,$uname,$udom,$symb)=@_;
2261: if (!($uname && $udom)) {
2262: (my $cursymb, my $courseid,$udom,$uname)=
2263: &Apache::lonxml::whichuser($symb);
2264: if (!$symb) { $symb=$cursymb; }
2265: }
2266: if (!$symb) { $symb=&symbread(); }
2267: return '<a href="/adm/grades?symb='.$symb.'&student='.$uname.
2268: '&userdom='.$udom.'&command=submission">'.$text.'</a>';
2269: }
2270: ##############################################
2271:
2272: =pod
2273:
2274: =back
2275:
2276: =cut
2277:
2278: ###############################################
2279:
2280:
2281: sub timehash {
2282: my @ltime=localtime(shift);
2283: return ( 'seconds' => $ltime[0],
2284: 'minutes' => $ltime[1],
2285: 'hours' => $ltime[2],
2286: 'day' => $ltime[3],
2287: 'month' => $ltime[4]+1,
2288: 'year' => $ltime[5]+1900,
2289: 'weekday' => $ltime[6],
2290: 'dayyear' => $ltime[7]+1,
2291: 'dlsav' => $ltime[8] );
2292: }
2293:
2294: sub maketime {
2295: my %th=@_;
2296: return POSIX::mktime(
2297: ($th{'seconds'},$th{'minutes'},$th{'hours'},
2298: $th{'day'},$th{'month'}-1,$th{'year'}-1900,0,0,$th{'dlsav'}));
2299: }
2300:
2301: #########################################
2302:
2303: sub findallcourses {
2304: my %courses=();
2305: my $now=time;
2306: foreach (keys %ENV) {
2307: if ($_=~/^user\.role\.\w+\.\/(\w+)\/(\w+)/) {
2308: my ($starttime,$endtime)=$ENV{$_};
2309: my $active=1;
2310: if ($starttime) {
2311: if ($now<$starttime) { $active=0; }
2312: }
2313: if ($endtime) {
2314: if ($now>$endtime) { $active=0; }
2315: }
2316: if ($active) { $courses{$1.'_'.$2}=1; }
2317: }
2318: }
2319: return keys %courses;
2320: }
2321:
2322: ###############################################
2323: ###############################################
2324:
2325: =pod
2326:
2327: =head1 Domain Template Functions
2328:
2329: =over 4
2330:
2331: =item * &determinedomain()
2332:
2333: Inputs: $domain (usually will be undef)
2334:
2335: Returns: Determines which domain should be used for designs
2336:
2337: =cut
2338:
2339: ###############################################
2340: sub determinedomain {
2341: my $domain=shift;
2342: if (! $domain) {
2343: # Determine domain if we have not been given one
2344: $domain = $Apache::lonnet::perlvar{'lonDefDomain'};
2345: if ($ENV{'user.domain'}) { $domain=$ENV{'user.domain'}; }
2346: if ($ENV{'request.role.domain'}) {
2347: $domain=$ENV{'request.role.domain'};
2348: }
2349: }
2350: return $domain;
2351: }
2352: ###############################################
2353: =pod
2354:
2355: =item * &domainlogo()
2356:
2357: Inputs: $domain (usually will be undef)
2358:
2359: Returns: A link to a domain logo, if the domain logo exists.
2360: If the domain logo does not exist, a description of the domain.
2361:
2362: =cut
2363:
2364: ###############################################
2365: sub domainlogo {
2366: my $domain = &determinedomain(shift);
2367: # See if there is a logo
2368: if (-e '/home/httpd/html/adm/lonDomLogos/'.$domain.'.gif') {
2369: my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
2370: if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
2371: return '<img src="http://'.$ENV{'HTTP_HOST'}.':'.$lonhttpdPort.
2372: '/adm/lonDomLogos/'.$domain.'.gif" alt="'.$domain.'" />';
2373: } elsif(exists($Apache::lonnet::domaindescription{$domain})) {
2374: return $Apache::lonnet::domaindescription{$domain};
2375: } else {
2376: return '';
2377: }
2378: }
2379: ##############################################
2380:
2381: =pod
2382:
2383: =item * &designparm()
2384:
2385: Inputs: $which parameter; $domain (usually will be undef)
2386:
2387: Returns: value of designparamter $which
2388:
2389: =cut
2390:
2391: ##############################################
2392: sub designparm {
2393: my ($which,$domain)=@_;
2394: if ($ENV{'browser.blackwhite'} eq 'on') {
2395: if ($which=~/\.(font|alink|vlink|link)$/) {
2396: return '#000000';
2397: }
2398: if ($which=~/\.(pgbg|sidebg)$/) {
2399: return '#FFFFFF';
2400: }
2401: if ($which=~/\.tabbg$/) {
2402: return '#CCCCCC';
2403: }
2404: }
2405: if ($ENV{'environment.color.'.$which}) {
2406: return $ENV{'environment.color.'.$which};
2407: }
2408: $domain=&determinedomain($domain);
2409: if ($designhash{$domain.'.'.$which}) {
2410: return $designhash{$domain.'.'.$which};
2411: } else {
2412: return $designhash{'default.'.$which};
2413: }
2414: }
2415:
2416: ###############################################
2417: ###############################################
2418:
2419: =pod
2420:
2421: =back
2422:
2423: =head1 HTTP Helpers
2424:
2425: =over 4
2426:
2427: =item * &bodytag()
2428:
2429: Returns a uniform header for LON-CAPA web pages.
2430:
2431: Inputs:
2432:
2433: =over 4
2434:
2435: =item * $title, A title to be displayed on the page.
2436:
2437: =item * $function, the current role (can be undef).
2438:
2439: =item * $addentries, extra parameters for the <body> tag.
2440:
2441: =item * $bodyonly, if defined, only return the <body> tag.
2442:
2443: =item * $domain, if defined, force a given domain.
2444:
2445: =item * $forcereg, if page should register as content page (relevant for
2446: text interface only)
2447:
2448: =back
2449:
2450: Returns: A uniform header for LON-CAPA web pages.
2451: If $bodyonly is nonzero, a string containing a <body> tag will be returned.
2452: If $bodyonly is undef or zero, an html string containing a <body> tag and
2453: other decorations will be returned.
2454:
2455: =cut
2456:
2457: sub bodytag {
2458: my ($title,$function,$addentries,$bodyonly,$domain,$forcereg)=@_;
2459: $title=&mt($title);
2460: $function = &get_users_function() if (!$function);
2461: my $img=&designparm($function.'.img',$domain);
2462: my $pgbg=&designparm($function.'.pgbg',$domain);
2463: my $tabbg=&designparm($function.'.tabbg',$domain);
2464: my $font=&designparm($function.'.font',$domain);
2465: my $link=&designparm($function.'.link',$domain);
2466: my $alink=&designparm($function.'.alink',$domain);
2467: my $vlink=&designparm($function.'.vlink',$domain);
2468: my $sidebg=&designparm($function.'.sidebg',$domain);
2469: # Accessibility font enhance
2470: unless ($addentries) { $addentries=''; }
2471: my $addstyle='';
2472: if ($ENV{'browser.fontenhance'} eq 'on') {
2473: $addstyle=' font-size: x-large;';
2474: }
2475: # role and realm
2476: my ($role,$realm)
2477: =&Apache::lonnet::plaintext((split(/\./,$ENV{'request.role'}))[0]);
2478: # realm
2479: if ($ENV{'request.course.id'}) {
2480: $realm=
2481: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
2482: }
2483: unless ($realm) { $realm=' '; }
2484: # Set messages
2485: my $messages=&domainlogo($domain);
2486: # Port for miniserver
2487: my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
2488: if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
2489: # construct main body tag
2490: my $bodytag = <<END;
2491: <style>
2492: h1, h2, h3, th { font-family: Arial, Helvetica, sans-serif }
2493: a:focus { color: red; background: yellow }
2494: </style>
2495: <body bgcolor="$pgbg" text="$font" alink="$alink" vlink="$vlink" link="$link"
2496: style="margin-top: 0px;$addstyle" $addentries>
2497: END
2498: my $upperleft='<img src="http://'.$ENV{'HTTP_HOST'}.':'.
2499: $lonhttpdPort.$img.'" alt="'.$function.'" />';
2500: if ($bodyonly) {
2501: return $bodytag;
2502: } elsif ($ENV{'browser.interface'} eq 'textual') {
2503: # Accessibility
2504: return $bodytag.&Apache::lonmenu::menubuttons($forcereg,'web',
2505: $forcereg).
2506: '<h1>LON-CAPA: '.$title.'</h1>';
2507: } elsif ($ENV{'environment.remote'} eq 'off') {
2508: # No Remote
2509: return $bodytag.&Apache::lonmenu::menubuttons($forcereg,'web',
2510: $forcereg).
2511: '<table bgcolor="'.$pgbg.'" width="100%" border="0" cellspacing="3" cellpadding="3"><tr><td bgcolor="'.$tabbg.'"><font face="Arial, Helvetica, sans-serif" size="+3" color="'.$font.'"><b>'.$title.
2512: '</b></font></td></tr></table>';
2513: }
2514:
2515: #
2516: # Top frame rendering, Remote is up
2517: #
2518: return(<<ENDBODY);
2519: $bodytag
2520: <table width="100%" cellspacing="0" border="0" cellpadding="0">
2521: <tr><td bgcolor="$sidebg">
2522: $upperleft</td>
2523: <td bgcolor="$sidebg" align="right">$messages </td>
2524: </tr>
2525: <tr>
2526: <td rowspan="3" bgcolor="$tabbg">
2527: <font size="5" face="Arial, Helvetica, sans-serif"><b>$title</b></font>
2528: <td bgcolor="$tabbg" align="right">
2529: <font size="2" face="Arial, Helvetica, sans-serif">
2530: $ENV{'environment.firstname'}
2531: $ENV{'environment.middlename'}
2532: $ENV{'environment.lastname'}
2533: $ENV{'environment.generation'}
2534: </font>
2535: </td>
2536: </tr>
2537: <tr><td bgcolor="$tabbg" align="right">
2538: <font size="2" face="Arial, Helvetica, sans-serif">$role</font>
2539: </td></tr>
2540: <tr>
2541: <td bgcolor="$tabbg" align="right"><font size="2" face="Arial, Helvetica, sans-serif">$realm</font> </td></tr>
2542: </table><br>
2543: ENDBODY
2544: }
2545:
2546: ###############################################
2547:
2548: =pod
2549:
2550: =item get_users_function
2551:
2552: Used by &bodytag to determine the current users primary role.
2553: Returns either 'student','coordinator','admin', or 'author'.
2554:
2555: =cut
2556:
2557: ###############################################
2558: sub get_users_function {
2559: my $function = 'student';
2560: if ($ENV{'request.role'}=~/^(cc|in|ta|ep)/) {
2561: $function='coordinator';
2562: }
2563: if ($ENV{'request.role'}=~/^(su|dc|ad|li)/) {
2564: $function='admin';
2565: }
2566: if (($ENV{'request.role'}=~/^(au|ca)/) ||
2567: ($ENV{'REQUEST_URI'}=~/^(\/priv|\~)/)) {
2568: $function='author';
2569: }
2570: return $function;
2571: }
2572:
2573: ###############################################
2574:
2575: sub get_posted_cgi {
2576: my $r=shift;
2577:
2578: my $buffer;
2579:
2580: $r->read($buffer,$r->header_in('Content-length'),0);
2581: unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) {
2582: my @pairs=split(/&/,$buffer);
2583: my $pair;
2584: foreach $pair (@pairs) {
2585: my ($name,$value) = split(/=/,$pair);
2586: $value =~ tr/+/ /;
2587: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2588: $name =~ tr/+/ /;
2589: $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2590: &add_to_env("form.$name",$value);
2591: }
2592: } else {
2593: my $contentsep=$1;
2594: my @lines = split (/\n/,$buffer);
2595: my $name='';
2596: my $value='';
2597: my $fname='';
2598: my $fmime='';
2599: my $i;
2600: for ($i=0;$i<=$#lines;$i++) {
2601: if ($lines[$i]=~/^$contentsep/) {
2602: if ($name) {
2603: chomp($value);
2604: if ($fname) {
2605: $ENV{"form.$name.filename"}=$fname;
2606: $ENV{"form.$name.mimetype"}=$fmime;
2607: } else {
2608: $value=~s/\s+$//s;
2609: }
2610: &add_to_env("form.$name",$value);
2611: }
2612: if ($i<$#lines) {
2613: $i++;
2614: $lines[$i]=~
2615: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
2616: $name=$1;
2617: $value='';
2618: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
2619: $fname=$1;
2620: if
2621: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
2622: $fmime=$1;
2623: $i++;
2624: } else {
2625: $fmime='';
2626: }
2627: } else {
2628: $fname='';
2629: $fmime='';
2630: }
2631: $i++;
2632: }
2633: } else {
2634: $value.=$lines[$i]."\n";
2635: }
2636: }
2637: }
2638: $ENV{'request.method'}=$ENV{'REQUEST_METHOD'};
2639: $r->method_number(M_GET);
2640: $r->method('GET');
2641: $r->headers_in->unset('Content-length');
2642: }
2643:
2644: =pod
2645:
2646: =item * get_unprocessed_cgi($query,$possible_names)
2647:
2648: Modify the %ENV hash to contain unprocessed CGI form parameters held in
2649: $query. The parameters listed in $possible_names (an array reference),
2650: will be set in $ENV{'form.name'} if they do not already exist.
2651:
2652: Typically called with $ENV{'QUERY_STRING'} as the first parameter.
2653: $possible_names is an ref to an array of form element names. As an example:
2654: get_unprocessed_cgi($ENV{'QUERY_STRING'},['uname','udom']);
2655: will result in $ENV{'form.uname'} and $ENV{'form.udom'} being set.
2656:
2657: =cut
2658:
2659: sub get_unprocessed_cgi {
2660: my ($query,$possible_names)= @_;
2661: # $Apache::lonxml::debug=1;
2662: foreach (split(/&/,$query)) {
2663: my ($name, $value) = split(/=/,$_);
2664: $name = &Apache::lonnet::unescape($name);
2665: if (!defined($possible_names) || (grep {$_ eq $name} @$possible_names)) {
2666: $value =~ tr/+/ /;
2667: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2668: &Apache::lonxml::debug("Seting :$name: to :$value:");
2669: unless (defined($ENV{'form.'.$name})) { &add_to_env('form.'.$name,$value) };
2670: }
2671: }
2672: }
2673:
2674: =pod
2675:
2676: =item * cacheheader()
2677:
2678: returns cache-controlling header code
2679:
2680: =cut
2681:
2682: sub cacheheader {
2683: unless ($ENV{'request.method'} eq 'GET') { return ''; }
2684: my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
2685: my $output .='<meta HTTP-EQUIV="Expires" CONTENT="'.$date.'" />
2686: <meta HTTP-EQUIV="Cache-control" CONTENT="no-cache" />
2687: <meta HTTP-EQUIV="Pragma" CONTENT="no-cache" />';
2688: return $output;
2689: }
2690:
2691: =pod
2692:
2693: =item * no_cache($r)
2694:
2695: specifies header code to not have cache
2696:
2697: =cut
2698:
2699: sub no_cache {
2700: my ($r) = @_;
2701: unless ($ENV{'request.method'} eq 'GET') { return ''; }
2702: #my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
2703: $r->no_cache(1);
2704: $r->header_out("Pragma" => "no-cache");
2705: #$r->header_out("Expires" => $date);
2706: }
2707:
2708: sub content_type {
2709: my ($r,$type,$charset) = @_;
2710: unless ($charset) {
2711: $charset=&Apache::lonlocal::current_encoding;
2712: }
2713: if ($charset) { $type.='; charset='.$charset; }
2714: if ($r) {
2715: $r->content_type($type);
2716: } else {
2717: print("Content-type: $type\n\n");
2718: }
2719: }
2720:
2721: =pod
2722:
2723: =item * add_to_env($name,$value)
2724:
2725: adds $name to the %ENV hash with value
2726: $value, if $name already exists, the entry is converted to an array
2727: reference and $value is added to the array.
2728:
2729: =cut
2730:
2731: sub add_to_env {
2732: my ($name,$value)=@_;
2733: if (defined($ENV{$name})) {
2734: if (ref($ENV{$name})) {
2735: #already have multiple values
2736: push(@{ $ENV{$name} },$value);
2737: } else {
2738: #first time seeing multiple values, convert hash entry to an arrayref
2739: my $first=$ENV{$name};
2740: undef($ENV{$name});
2741: push(@{ $ENV{$name} },$first,$value);
2742: }
2743: } else {
2744: $ENV{$name}=$value;
2745: }
2746: }
2747:
2748: =pod
2749:
2750: =item * get_env_multiple($name)
2751:
2752: gets $name from the %ENV hash, it seemlessly handles the cases where multiple
2753: values may be defined and end up as an array ref.
2754:
2755: returns an array of values
2756:
2757: =cut
2758:
2759: sub get_env_multiple {
2760: my ($name) = @_;
2761: my @values;
2762: if (defined($ENV{$name})) {
2763: # exists is it an array
2764: if (ref($ENV{$name})) {
2765: @values=@{ $ENV{$name} };
2766: } else {
2767: $values[0]=$ENV{$name};
2768: }
2769: }
2770: return(@values);
2771: }
2772:
2773:
2774: =pod
2775:
2776: =back
2777:
2778: =head1 CSV Upload/Handling functions
2779:
2780: =over 4
2781:
2782: =item * upfile_store($r)
2783:
2784: Store uploaded file, $r should be the HTTP Request object,
2785: needs $ENV{'form.upfile'}
2786: returns $datatoken to be put into hidden field
2787:
2788: =cut
2789:
2790: sub upfile_store {
2791: my $r=shift;
2792: $ENV{'form.upfile'}=~s/\r/\n/gs;
2793: $ENV{'form.upfile'}=~s/\f/\n/gs;
2794: $ENV{'form.upfile'}=~s/\n+/\n/gs;
2795: $ENV{'form.upfile'}=~s/\n+$//gs;
2796:
2797: my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.
2798: '_enroll_'.$ENV{'request.course.id'}.'_'.time.'_'.$$;
2799: {
2800: my $datafile = $r->dir_config('lonDaemons').
2801: '/tmp/'.$datatoken.'.tmp';
2802: if ( open(my $fh,">$datafile") ) {
2803: print $fh $ENV{'form.upfile'};
2804: close($fh);
2805: }
2806: }
2807: return $datatoken;
2808: }
2809:
2810: =pod
2811:
2812: =item * load_tmp_file($r)
2813:
2814: Load uploaded file from tmp, $r should be the HTTP Request object,
2815: needs $ENV{'form.datatoken'},
2816: sets $ENV{'form.upfile'} to the contents of the file
2817:
2818: =cut
2819:
2820: sub load_tmp_file {
2821: my $r=shift;
2822: my @studentdata=();
2823: {
2824: my $studentfile = $r->dir_config('lonDaemons').
2825: '/tmp/'.$ENV{'form.datatoken'}.'.tmp';
2826: if ( open(my $fh,"<$studentfile") ) {
2827: @studentdata=<$fh>;
2828: close($fh);
2829: }
2830: }
2831: $ENV{'form.upfile'}=join('',@studentdata);
2832: }
2833:
2834: =pod
2835:
2836: =item * upfile_record_sep()
2837:
2838: Separate uploaded file into records
2839: returns array of records,
2840: needs $ENV{'form.upfile'} and $ENV{'form.upfiletype'}
2841:
2842: =cut
2843:
2844: sub upfile_record_sep {
2845: if ($ENV{'form.upfiletype'} eq 'xml') {
2846: } else {
2847: return split(/\n/,$ENV{'form.upfile'});
2848: }
2849: }
2850:
2851: =pod
2852:
2853: =item * record_sep($record)
2854:
2855: Separate a record into fields $record should be an item from the upfile_record_sep(), needs $ENV{'form.upfiletype'}
2856:
2857: =cut
2858:
2859: sub record_sep {
2860: my $record=shift;
2861: my %components=();
2862: if ($ENV{'form.upfiletype'} eq 'xml') {
2863: } elsif ($ENV{'form.upfiletype'} eq 'space') {
2864: my $i=0;
2865: foreach (split(/\s+/,$record)) {
2866: my $field=$_;
2867: $field=~s/^(\"|\')//;
2868: $field=~s/(\"|\')$//;
2869: $components{$i}=$field;
2870: $i++;
2871: }
2872: } elsif ($ENV{'form.upfiletype'} eq 'tab') {
2873: my $i=0;
2874: foreach (split(/\t/,$record)) {
2875: my $field=$_;
2876: $field=~s/^(\"|\')//;
2877: $field=~s/(\"|\')$//;
2878: $components{$i}=$field;
2879: $i++;
2880: }
2881: } else {
2882: my @allfields=split(/\,/,$record);
2883: my $i=0;
2884: my $j;
2885: for ($j=0;$j<=$#allfields;$j++) {
2886: my $field=$allfields[$j];
2887: if ($field=~/^\s*(\"|\')/) {
2888: my $delimiter=$1;
2889: while (($field!~/$delimiter$/) && ($j<$#allfields)) {
2890: $j++;
2891: $field.=','.$allfields[$j];
2892: }
2893: $field=~s/^\s*$delimiter//;
2894: $field=~s/$delimiter\s*$//;
2895: }
2896: $components{$i}=$field;
2897: $i++;
2898: }
2899: }
2900: return %components;
2901: }
2902:
2903: ######################################################
2904: ######################################################
2905:
2906: =pod
2907:
2908: =item * upfile_select_html()
2909:
2910: Return HTML code to select a file from the users machine and specify
2911: the file type.
2912:
2913: =cut
2914:
2915: ######################################################
2916: ######################################################
2917: sub upfile_select_html {
2918: my %Types = (
2919: csv => &mt('CSV (comma separated values, spreadsheet)'),
2920: space => &mt('Space separated'),
2921: tab => &mt('Tabulator separated'),
2922: # xml => &mt('HTML/XML'),
2923: );
2924: my $Str = '<input type="file" name="upfile" size="50" />'.
2925: '<br />Type: <select name="upfiletype">';
2926: foreach my $type (sort(keys(%Types))) {
2927: $Str .= '<option value="'.$type.'" >'.$Types{$type}."</option>\n";
2928: }
2929: $Str .= "</select>\n";
2930: return $Str;
2931: }
2932:
2933: ######################################################
2934: ######################################################
2935:
2936: =pod
2937:
2938: =item * csv_print_samples($r,$records)
2939:
2940: Prints a table of sample values from each column uploaded $r is an
2941: Apache Request ref, $records is an arrayref from
2942: &Apache::loncommon::upfile_record_sep
2943:
2944: =cut
2945:
2946: ######################################################
2947: ######################################################
2948: sub csv_print_samples {
2949: my ($r,$records) = @_;
2950: my (%sone,%stwo,%sthree);
2951: %sone=&record_sep($$records[0]);
2952: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
2953: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
2954: #
2955: $r->print(&mt('Samples').'<br /><table border="2"><tr>');
2956: foreach (sort({$a <=> $b} keys(%sone))) {
2957: $r->print('<th>'.&mt('Column [_1]',($_+1)).'</th>'); }
2958: $r->print('</tr>');
2959: foreach my $hash (\%sone,\%stwo,\%sthree) {
2960: $r->print('<tr>');
2961: foreach (sort({$a <=> $b} keys(%sone))) {
2962: $r->print('<td>');
2963: if (defined($$hash{$_})) { $r->print($$hash{$_}); }
2964: $r->print('</td>');
2965: }
2966: $r->print('</tr>');
2967: }
2968: $r->print('</tr></table><br />'."\n");
2969: }
2970:
2971: ######################################################
2972: ######################################################
2973:
2974: =pod
2975:
2976: =item * csv_print_select_table($r,$records,$d)
2977:
2978: Prints a table to create associations between values and table columns.
2979:
2980: $r is an Apache Request ref,
2981: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
2982: $d is an array of 2 element arrays (internal name, displayed name,defaultcol)
2983:
2984: =cut
2985:
2986: ######################################################
2987: ######################################################
2988: sub csv_print_select_table {
2989: my ($r,$records,$d) = @_;
2990: my $i=0;my %sone;
2991: %sone=&record_sep($$records[0]);
2992: $r->print(&mt('Associate columns with student attributes.')."\n".
2993: '<table border="2"><tr>'.
2994: '<th>'.&mt('Attribute').'</th>'.
2995: '<th>'.&mt('Column').'</th></tr>'."\n");
2996: foreach (@$d) {
2997: my ($value,$display,$defaultcol)=@{ $_ };
2998: $r->print('<tr><td>'.$display.'</td>');
2999:
3000: $r->print('<td><select name=f'.$i.
3001: ' onchange="javascript:flip(this.form,'.$i.');">');
3002: $r->print('<option value="none"></option>');
3003: foreach (sort({$a <=> $b} keys(%sone))) {
3004: $r->print('<option value="'.$_.'"'.
3005: ($_ eq $defaultcol ? ' selected ' : '').
3006: '>Column '.($_+1).'</option>');
3007: }
3008: $r->print('</select></td></tr>'."\n");
3009: $i++;
3010: }
3011: $i--;
3012: return $i;
3013: }
3014:
3015: ######################################################
3016: ######################################################
3017:
3018: =pod
3019:
3020: =item * csv_samples_select_table($r,$records,$d)
3021:
3022: Prints a table of sample values from the upload and can make associate samples to internal names.
3023:
3024: $r is an Apache Request ref,
3025: $records is an arrayref from &Apache::loncommon::upfile_record_sep,
3026: $d is an array of 2 element arrays (internal name, displayed name)
3027:
3028: =cut
3029:
3030: ######################################################
3031: ######################################################
3032: sub csv_samples_select_table {
3033: my ($r,$records,$d) = @_;
3034: my %sone; my %stwo; my %sthree;
3035: my $i=0;
3036: #
3037: $r->print('<table border=2><tr><th>'.
3038: &mt('Field').'</th><th>'.&mt('Samples').'</th></tr>');
3039: %sone=&record_sep($$records[0]);
3040: if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
3041: if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
3042: #
3043: foreach (sort keys %sone) {
3044: $r->print('<tr><td><select name="f'.$i.'"'.
3045: ' onchange="javascript:flip(this.form,'.$i.');">');
3046: foreach (@$d) {
3047: my ($value,$display,$defaultcol)=@{ $_ };
3048: $r->print('<option value="'.$value.'"'.
3049: ($i eq $defaultcol ? ' selected ':'').'>'.
3050: $display.'</option>');
3051: }
3052: $r->print('</select></td><td>');
3053: if (defined($sone{$_})) { $r->print($sone{$_}."</br>\n"); }
3054: if (defined($stwo{$_})) { $r->print($stwo{$_}."</br>\n"); }
3055: if (defined($sthree{$_})) { $r->print($sthree{$_}."</br>\n"); }
3056: $r->print('</td></tr>');
3057: $i++;
3058: }
3059: $i--;
3060: return($i);
3061: }
3062:
3063: ######################################################
3064: ######################################################
3065:
3066: =pod
3067:
3068: =item clean_excel_name($name)
3069:
3070: Returns a replacement for $name which does not contain any illegal characters.
3071:
3072: =cut
3073:
3074: ######################################################
3075: ######################################################
3076: sub clean_excel_name {
3077: my ($name) = @_;
3078: $name =~ s/[:\*\?\/\\]//g;
3079: if (length($name) > 31) {
3080: $name = substr($name,0,31);
3081: }
3082: return $name;
3083: }
3084:
3085: =pod
3086:
3087: =item * check_if_partid_hidden($id,$symb,$udom,$uname)
3088:
3089: Returns either 1 or undef
3090:
3091: 1 if the part is to be hidden, undef if it is to be shown
3092:
3093: Arguments are:
3094:
3095: $id the id of the part to be checked
3096: $symb, optional the symb of the resource to check
3097: $udom, optional the domain of the user to check for
3098: $uname, optional the username of the user to check for
3099:
3100: =cut
3101:
3102: sub check_if_partid_hidden {
3103: my ($id,$symb,$udom,$uname) = @_;
3104: my $hiddenparts=&Apache::lonnet::EXT('resource.0.hiddenparts',
3105: $symb,$udom,$uname);
3106: my $truth=1;
3107: #if the string starts with !, then the list is the list to show not hide
3108: if ($hiddenparts=~s/^\s*!//) { $truth=undef; }
3109: my @hiddenlist=split(/,/,$hiddenparts);
3110: foreach my $checkid (@hiddenlist) {
3111: if ($checkid =~ /^\s*\Q$id\E\s*$/) { return $truth; }
3112: }
3113: return !$truth;
3114: }
3115:
3116:
3117: ############################################################
3118: ############################################################
3119:
3120: =pod
3121:
3122: =back
3123:
3124: =head1 cgi-bin script and graphing routines
3125:
3126: =over 4
3127:
3128: =item get_cgi_id
3129:
3130: Inputs: none
3131:
3132: Returns an id which can be used to pass environment variables
3133: to various cgi-bin scripts. These environment variables will
3134: be removed from the users environment after a given time by
3135: the routine &Apache::lonnet::transfer_profile_to_env.
3136:
3137: =cut
3138:
3139: ############################################################
3140: ############################################################
3141: my $uniq=0;
3142: sub get_cgi_id {
3143: $uniq=($uniq+1)%100000;
3144: return (time.'_'.$uniq);
3145: }
3146:
3147: ############################################################
3148: ############################################################
3149:
3150: =pod
3151:
3152: =item DrawBarGraph
3153:
3154: Facilitates the plotting of data in a (stacked) bar graph.
3155: Puts plot definition data into the users environment in order for
3156: graph.png to plot it. Returns an <img> tag for the plot.
3157: The bars on the plot are labeled '1','2',...,'n'.
3158:
3159: Inputs:
3160:
3161: =over 4
3162:
3163: =item $Title: string, the title of the plot
3164:
3165: =item $xlabel: string, text describing the X-axis of the plot
3166:
3167: =item $ylabel: string, text describing the Y-axis of the plot
3168:
3169: =item $Max: scalar, the maximum Y value to use in the plot
3170: If $Max is < any data point, the graph will not be rendered.
3171:
3172: =item $colors: array ref holding the colors to be used for the data sets when
3173: they are plotted. If undefined, default values will be used.
3174:
3175: =item $labels: array ref holding the labels to use on the x-axis for the bars.
3176:
3177: =item @Values: An array of array references. Each array reference holds data
3178: to be plotted in a stacked bar chart.
3179:
3180: =back
3181:
3182: Returns:
3183:
3184: An <img> tag which references graph.png and the appropriate identifying
3185: information for the plot.
3186:
3187: =cut
3188:
3189: ############################################################
3190: ############################################################
3191: sub DrawBarGraph {
3192: my ($Title,$xlabel,$ylabel,$Max,$colors,$labels,@Values)=@_;
3193: #
3194: if (! defined($colors)) {
3195: $colors = ['#33ff00',
3196: '#0033cc', '#990000', '#aaaa66', '#663399', '#ff9933',
3197: '#66ccff', '#ff9999', '#cccc33', '#660000', '#33cc66',
3198: ];
3199: }
3200: #
3201: my $identifier = &get_cgi_id();
3202: my $id = 'cgi.'.$identifier;
3203: if (! @Values || ref($Values[0]) ne 'ARRAY') {
3204: return '';
3205: }
3206: my $NumBars = scalar(@{$Values[0]});
3207: my %ValuesHash;
3208: my $NumSets=1;
3209: foreach my $array (@Values) {
3210: next if (! ref($array));
3211: $ValuesHash{$id.'.data.'.$NumSets++} =
3212: join(',',@$array);
3213: }
3214: #
3215: my ($height,$width,$xskip,$bar_width) = (200,120,1,15);
3216: if ($NumBars < 10) {
3217: $width = 120+$NumBars*15;
3218: $xskip = 1;
3219: $bar_width = 15;
3220: } elsif ($NumBars <= 25) {
3221: $width = 120+$NumBars*11;
3222: $xskip = 5;
3223: $bar_width = 8;
3224: } elsif ($NumBars <= 50) {
3225: $width = 120+$NumBars*8;
3226: $xskip = 5;
3227: $bar_width = 4;
3228: } else {
3229: $width = 120+$NumBars*8;
3230: $xskip = 5;
3231: $bar_width = 4;
3232: }
3233: #
3234: my @Labels;
3235: if (defined($labels)) {
3236: @Labels = @$labels;
3237: } else {
3238: for (my $i=0;$i<@{$Values[0]};$i++) {
3239: push (@Labels,$i+1);
3240: }
3241: }
3242: #
3243: $Max = 1 if ($Max < 1);
3244: if ( int($Max) < $Max ) {
3245: $Max++;
3246: $Max = int($Max);
3247: }
3248: $Title = '' if (! defined($Title));
3249: $xlabel = '' if (! defined($xlabel));
3250: $ylabel = '' if (! defined($ylabel));
3251: $ValuesHash{$id.'.title'} = &Apache::lonnet::escape($Title);
3252: $ValuesHash{$id.'.xlabel'} = &Apache::lonnet::escape($xlabel);
3253: $ValuesHash{$id.'.ylabel'} = &Apache::lonnet::escape($ylabel);
3254: $ValuesHash{$id.'.y_max_value'} = $Max;
3255: $ValuesHash{$id.'.NumBars'} = $NumBars;
3256: $ValuesHash{$id.'.NumSets'} = $NumSets;
3257: $ValuesHash{$id.'.PlotType'} = 'bar';
3258: $ValuesHash{$id.'.Colors'} = join(',',@{$colors});
3259: $ValuesHash{$id.'.height'} = $height;
3260: $ValuesHash{$id.'.width'} = $width;
3261: $ValuesHash{$id.'.xskip'} = $xskip;
3262: $ValuesHash{$id.'.bar_width'} = $bar_width;
3263: $ValuesHash{$id.'.labels'} = join(',',@Labels);
3264: #
3265: &Apache::lonnet::appenv(%ValuesHash);
3266: return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
3267: }
3268:
3269: ############################################################
3270: ############################################################
3271:
3272: =pod
3273:
3274: =item DrawXYGraph
3275:
3276: Facilitates the plotting of data in an XY graph.
3277: Puts plot definition data into the users environment in order for
3278: graph.png to plot it. Returns an <img> tag for the plot.
3279:
3280: Inputs:
3281:
3282: =over 4
3283:
3284: =item $Title: string, the title of the plot
3285:
3286: =item $xlabel: string, text describing the X-axis of the plot
3287:
3288: =item $ylabel: string, text describing the Y-axis of the plot
3289:
3290: =item $Max: scalar, the maximum Y value to use in the plot
3291: If $Max is < any data point, the graph will not be rendered.
3292:
3293: =item $colors: Array ref containing the hex color codes for the data to be
3294: plotted in. If undefined, default values will be used.
3295:
3296: =item $Xlabels: Array ref containing the labels to be used for the X-axis.
3297:
3298: =item $Ydata: Array ref containing Array refs.
3299: Each of the contained arrays will be plotted as a separate curve.
3300:
3301: =item %Values: hash indicating or overriding any default values which are
3302: passed to graph.png.
3303: Possible values are: width, xskip, x_ticks, x_tick_offset, among others.
3304:
3305: =back
3306:
3307: Returns:
3308:
3309: An <img> tag which references graph.png and the appropriate identifying
3310: information for the plot.
3311:
3312: =cut
3313:
3314: ############################################################
3315: ############################################################
3316: sub DrawXYGraph {
3317: my ($Title,$xlabel,$ylabel,$Max,$colors,$Xlabels,$Ydata,%Values)=@_;
3318: #
3319: # Create the identifier for the graph
3320: my $identifier = &get_cgi_id();
3321: my $id = 'cgi.'.$identifier;
3322: #
3323: $Title = '' if (! defined($Title));
3324: $xlabel = '' if (! defined($xlabel));
3325: $ylabel = '' if (! defined($ylabel));
3326: my %ValuesHash =
3327: (
3328: $id.'.title' => &Apache::lonnet::escape($Title),
3329: $id.'.xlabel' => &Apache::lonnet::escape($xlabel),
3330: $id.'.ylabel' => &Apache::lonnet::escape($ylabel),
3331: $id.'.y_max_value'=> $Max,
3332: $id.'.labels' => join(',',@$Xlabels),
3333: $id.'.PlotType' => 'XY',
3334: );
3335: #
3336: if (defined($colors) && ref($colors) eq 'ARRAY') {
3337: $ValuesHash{$id.'.Colors'} = join(',',@{$colors});
3338: }
3339: #
3340: if (! ref($Ydata) || ref($Ydata) ne 'ARRAY') {
3341: return '';
3342: }
3343: my $NumSets=1;
3344: foreach my $array (@{$Ydata}){
3345: next if (! ref($array));
3346: $ValuesHash{$id.'.data.'.$NumSets++} = join(',',@$array);
3347: }
3348: $ValuesHash{$id.'.NumSets'} = $NumSets-1;
3349: #
3350: # Deal with other parameters
3351: while (my ($key,$value) = each(%Values)) {
3352: $ValuesHash{$id.'.'.$key} = $value;
3353: }
3354: #
3355: &Apache::lonnet::appenv(%ValuesHash);
3356: return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
3357: }
3358:
3359: ############################################################
3360: ############################################################
3361:
3362: =pod
3363:
3364: =item DrawXYYGraph
3365:
3366: Facilitates the plotting of data in an XY graph with two Y axes.
3367: Puts plot definition data into the users environment in order for
3368: graph.png to plot it. Returns an <img> tag for the plot.
3369:
3370: Inputs:
3371:
3372: =over 4
3373:
3374: =item $Title: string, the title of the plot
3375:
3376: =item $xlabel: string, text describing the X-axis of the plot
3377:
3378: =item $ylabel: string, text describing the Y-axis of the plot
3379:
3380: =item $colors: Array ref containing the hex color codes for the data to be
3381: plotted in. If undefined, default values will be used.
3382:
3383: =item $Xlabels: Array ref containing the labels to be used for the X-axis.
3384:
3385: =item $Ydata1: The first data set
3386:
3387: =item $Min1: The minimum value of the left Y-axis
3388:
3389: =item $Max1: The maximum value of the left Y-axis
3390:
3391: =item $Ydata2: The second data set
3392:
3393: =item $Min2: The minimum value of the right Y-axis
3394:
3395: =item $Max2: The maximum value of the left Y-axis
3396:
3397: =item %Values: hash indicating or overriding any default values which are
3398: passed to graph.png.
3399: Possible values are: width, xskip, x_ticks, x_tick_offset, among others.
3400:
3401: =back
3402:
3403: Returns:
3404:
3405: An <img> tag which references graph.png and the appropriate identifying
3406: information for the plot.
3407:
3408: =cut
3409:
3410: ############################################################
3411: ############################################################
3412: sub DrawXYYGraph {
3413: my ($Title,$xlabel,$ylabel,$colors,$Xlabels,$Ydata1,$Min1,$Max1,
3414: $Ydata2,$Min2,$Max2,%Values)=@_;
3415: #
3416: # Create the identifier for the graph
3417: my $identifier = &get_cgi_id();
3418: my $id = 'cgi.'.$identifier;
3419: #
3420: $Title = '' if (! defined($Title));
3421: $xlabel = '' if (! defined($xlabel));
3422: $ylabel = '' if (! defined($ylabel));
3423: my %ValuesHash =
3424: (
3425: $id.'.title' => &Apache::lonnet::escape($Title),
3426: $id.'.xlabel' => &Apache::lonnet::escape($xlabel),
3427: $id.'.ylabel' => &Apache::lonnet::escape($ylabel),
3428: $id.'.labels' => join(',',@$Xlabels),
3429: $id.'.PlotType' => 'XY',
3430: $id.'.NumSets' => 2,
3431: $id.'.two_axes' => 1,
3432: $id.'.y1_max_value' => $Max1,
3433: $id.'.y1_min_value' => $Min1,
3434: $id.'.y2_max_value' => $Max2,
3435: $id.'.y2_min_value' => $Min2,
3436: );
3437: #
3438: if (defined($colors) && ref($colors) eq 'ARRAY') {
3439: $ValuesHash{$id.'.Colors'} = join(',',@{$colors});
3440: }
3441: #
3442: if (! ref($Ydata1) || ref($Ydata1) ne 'ARRAY' ||
3443: ! ref($Ydata2) || ref($Ydata2) ne 'ARRAY'){
3444: return '';
3445: }
3446: my $NumSets=1;
3447: foreach my $array ($Ydata1,$Ydata2){
3448: next if (! ref($array));
3449: $ValuesHash{$id.'.data.'.$NumSets++} = join(',',@$array);
3450: }
3451: #
3452: # Deal with other parameters
3453: while (my ($key,$value) = each(%Values)) {
3454: $ValuesHash{$id.'.'.$key} = $value;
3455: }
3456: #
3457: &Apache::lonnet::appenv(%ValuesHash);
3458: return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
3459: }
3460:
3461: ############################################################
3462: ############################################################
3463:
3464: =pod
3465:
3466: =back
3467:
3468: =head1 Statistics helper routines?
3469:
3470: Bad place for them but what the hell.
3471:
3472: =over 4
3473:
3474: =item &chartlink
3475:
3476: Returns a link to the chart for a specific student.
3477:
3478: Inputs:
3479:
3480: =over 4
3481:
3482: =item $linktext: The text of the link
3483:
3484: =item $sname: The students username
3485:
3486: =item $sdomain: The students domain
3487:
3488: =back
3489:
3490: =back
3491:
3492: =cut
3493:
3494: ############################################################
3495: ############################################################
3496: sub chartlink {
3497: my ($linktext, $sname, $sdomain) = @_;
3498: my $link = '<a href="/adm/statistics?reportSelected=student_assessment'.
3499: '&SelectedStudent='.&Apache::lonnet::escape($sname.':'.$sdomain).
3500: '&chartoutputmode='.HTML::Entities::encode('html, with all links').
3501: '">'.$linktext.'</a>';
3502: }
3503:
3504: #######################################################
3505: #######################################################
3506:
3507: =pod
3508:
3509: =head1 Course Environment Routines
3510:
3511: =over 4
3512:
3513: =item &restore_course_settings
3514:
3515: =item &store_course_settings
3516:
3517: Restores/Store indicated form parameters from the course environment.
3518: Will not overwrite existing values of the form parameters.
3519:
3520: Inputs:
3521: a scalar describing the data (e.g. 'chart', 'problem_analysis')
3522:
3523: a hash ref describing the data to be stored. For example:
3524:
3525: %Save_Parameters = ('Status' => 'scalar',
3526: 'chartoutputmode' => 'scalar',
3527: 'chartoutputdata' => 'scalar',
3528: 'Section' => 'array',
3529: 'StudentData' => 'array',
3530: 'Maps' => 'array');
3531:
3532: Returns: both routines return nothing
3533:
3534: =cut
3535:
3536: #######################################################
3537: #######################################################
3538: sub store_course_settings {
3539: # save to the environment
3540: # appenv the same items, just to be safe
3541: my $courseid = $ENV{'request.course.id'};
3542: my $coursedom = $ENV{'course.'.$courseid.'.domain'};
3543: my ($prefix,$Settings) = @_;
3544: my %SaveHash;
3545: my %AppHash;
3546: while (my ($setting,$type) = each(%$Settings)) {
3547: my $basename = 'internal.'.$prefix.'.'.$setting;
3548: my $envname = 'course.'.$courseid.'.'.$basename;
3549: if (exists($ENV{'form.'.$setting})) {
3550: # Save this value away
3551: if ($type eq 'scalar' &&
3552: (! exists($ENV{$envname}) ||
3553: $ENV{$envname} ne $ENV{'form.'.$setting})) {
3554: $SaveHash{$basename} = $ENV{'form.'.$setting};
3555: $AppHash{$envname} = $ENV{'form.'.$setting};
3556: } elsif ($type eq 'array') {
3557: my $stored_form;
3558: if (ref($ENV{'form.'.$setting})) {
3559: $stored_form = join(',',
3560: map {
3561: &Apache::lonnet::escape($_);
3562: } sort(@{$ENV{'form.'.$setting}}));
3563: } else {
3564: $stored_form =
3565: &Apache::lonnet::escape($ENV{'form.'.$setting});
3566: }
3567: # Determine if the array contents are the same.
3568: if ($stored_form ne $ENV{$envname}) {
3569: $SaveHash{$basename} = $stored_form;
3570: $AppHash{$envname} = $stored_form;
3571: }
3572: }
3573: }
3574: }
3575: my $put_result = &Apache::lonnet::put('environment',\%SaveHash,
3576: $coursedom,
3577: $ENV{'course.'.$courseid.'.num'});
3578: if ($put_result !~ /^(ok|delayed)/) {
3579: &Apache::lonnet::logthis('unable to save form parameters, '.
3580: 'got error:'.$put_result);
3581: }
3582: # Make sure these settings stick around in this session, too
3583: &Apache::lonnet::appenv(%AppHash);
3584: return;
3585: }
3586:
3587: sub restore_course_settings {
3588: my $courseid = $ENV{'request.course.id'};
3589: my ($prefix,$Settings) = @_;
3590: while (my ($setting,$type) = each(%$Settings)) {
3591: next if (exists($ENV{'form.'.$setting}));
3592: my $envname = 'course.'.$courseid.'.internal.'.$prefix.
3593: '.'.$setting;
3594: if (exists($ENV{$envname})) {
3595: if ($type eq 'scalar') {
3596: $ENV{'form.'.$setting} = $ENV{$envname};
3597: } elsif ($type eq 'array') {
3598: $ENV{'form.'.$setting} = [
3599: map {
3600: &Apache::lonnet::unescape($_);
3601: } split(',',$ENV{$envname})
3602: ];
3603: }
3604: }
3605: }
3606: }
3607:
3608: ############################################################
3609: ############################################################
3610:
3611: sub propath {
3612: my ($udom,$uname)=@_;
3613: $udom=~s/\W//g;
3614: $uname=~s/\W//g;
3615: my $subdir=$uname.'__';
3616: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3617: my $proname="$Apache::lonnet::perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
3618: return $proname;
3619: }
3620:
3621: sub icon {
3622: my ($file)=@_;
3623: my $curfext = (split(/\./,$file))[-1];
3624: my $iconname=$Apache::lonnet::perlvar{'lonIconsURL'}.'/unknown.gif';
3625: my $embstyle = &Apache::loncommon::fileembstyle($curfext);
3626: if (!(!defined($embstyle) || $embstyle eq 'unk' || $embstyle eq 'hdn')) {
3627: if (-e $Apache::lonnet::perlvar{'lonDocRoot'}.'/'.
3628: $Apache::lonnet::perlvar{'lonIconsURL'}.'/'.
3629: $curfext.".gif") {
3630: $iconname=$Apache::lonnet::perlvar{'lonIconsURL'}.'/'.
3631: $curfext.".gif";
3632: }
3633: }
3634: return $iconname;
3635: }
3636:
3637: =pod
3638:
3639: =back
3640:
3641: =cut
3642:
3643: 1;
3644: __END__;
3645:
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