1: # The LearningOnline Network with CAPA
2: # edit mode helpers
3: #
4: # $Id: edit.pm,v 1.63 2003/09/08 21:22:15 albertel 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: # 3/20 Guy
29: # 01/10/02 Matthew
30: # 03/06/02 Matthew
31: package Apache::edit;
32:
33: use strict;
34: use Apache::lonnet();
35: use HTML::Entities();
36:
37: # Global Vars
38: # default list of colors to use in editing
39: @Apache::edit::colorlist=('#ffffff','#ff0000','#00ff00','#0000ff','#0ff000','#000ff0','#f0000f');
40: # depth of nesting of edit
41: $Apache::edit::colordepth=0;
42: @Apache::edit::inserttag=();
43: # image-type responses: active background image and curdepth at definition
44: $Apache::edit::bgimgsrc='';
45: $Apache::edit::bgimgsrccurdepth='';
46:
47: sub initialize_edit {
48: $Apache::edit::colordepth=0;
49: @Apache::edit::inserttag=();
50: }
51:
52: sub tag_start {
53: my ($target,$token,$description) = @_;
54: my $result='';
55: if ($target eq "edit") {
56: my $tag=$token->[1];
57: if (!$description) {
58: $description=&Apache::lonxml::description($token);
59: if (!$description) { $description="<$tag>"; }
60: }
61: $result.= &start_table($token)."<tr><td>$description</td>
62: <td>Delete".
63: &deletelist($target,$token)
64: ."</td>
65: <td>".
66: &insertlist($target,$token);
67: #<td>".
68: # &movebuttons($target,$token).
69: # "</tr><tr><td colspan=\"3\">\n";
70: my @help;# = Apache::lonxml::helpinfo($token);
71: if ($help[0]) {
72: $result .= '<td align="right" valign="top">' .
73: Apache::loncommon::help_open_topic(@help) .
74: '</td>';
75: } else { $result .= "<td> </td>"; }
76: $result .= &end_row().&start_spanning_row();
77: }
78: return $result;
79: }
80:
81: sub tag_end {
82: my ($target,$token,$description) = @_;
83: my $result='';
84: if ($target eq 'edit') {
85: $result.="</td></tr>".&end_table()."\n";
86: }
87: return $result;
88: }
89:
90: sub start_table {
91: my ($token)=@_;
92: my $tag = $token->[1];
93: my $tagnum;
94: foreach my $namespace (reverse @Apache::lonxml::namespace) {
95: my $testtag=$namespace.'::'.$tag;
96: $tagnum=$Apache::lonxml::insertlist{"$testtag.num"};
97: if (defined($tagnum)) { last; }
98: }
99: if (!defined ($tagnum)) {$tagnum=$Apache::lonxml::insertlist{"$tag.num"};}
100: my $color = $Apache::lonxml::insertlist{"$tagnum.color"};
101: if (!defined($color)) {
102: $color = $Apache::edit::colorlist[$Apache::edit::colordepth];
103: }
104: $Apache::edit::colordepth++;
105: push(@Apache::edit::inserttag,$token->[1]);
106: my $result='<div align="right">';
107: $result.='<table bgcolor="'.$color.'" width="97%" border="0" cellspacing="5" cellpadding="3">';
108: return $result;
109: }
110:
111: sub end_table {
112: $Apache::edit::colordepth--;
113: my $result='</table></div>';
114: $result.="<table><tr><td>";
115:
116: my ($tagname,$closingtag);
117: if (defined($Apache::edit::inserttag[-2])) {
118: $tagname=$Apache::edit::inserttag[-2];
119: } else {$tagname='problem';}
120: if (defined($Apache::edit::inserttag[-1])) {
121: $closingtag=$Apache::edit::inserttag[-1];
122: }
123: $result.=&innerinsertlist('edit',$tagname,$closingtag).
124: "</td></tr></table>";
125: pop(@Apache::edit::inserttag);
126: return $result;
127: }
128:
129: sub start_spanning_row { return '<tr><td colspan="4" bgcolor="#DDDDDD">';}
130: sub start_row { return '<tr><td bgcolor="#DDDDDD">'; }
131: sub end_row { return '</td></tr>'; }
132:
133: sub movebuttons {
134: my ($target,$token) = @_;
135: my $result='<input type="submit" name="moveup.'.
136: $Apache::lonxml::curdepth.'" value="Move Up" />';
137: $result.='<input type="submit" name="movedown.'.
138: $Apache::lonxml::curdepth.'" value="Move Down" />';
139: return $result;
140: }
141:
142: sub deletelist {
143: my ($target,$token) = @_;
144: my $result = "<select name=\"delete_$Apache::lonxml::curdepth\">
145: <option></option>
146: <option>Yes</option>
147: </select>";
148: return $result;
149: }
150:
151: sub handle_delete {
152: if (!$ENV{"form.delete_$Apache::lonxml::curdepth"}) { return ''; }
153: my ($space,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
154: my $result=0;
155: if ($space) {
156: my $sub1="$space\:\:delete_$token->[1]";
157: {
158: no strict 'refs';
159: if (defined &$sub1) {
160: $result=&$sub1($target,$token,$tagstack,$parstack,$parser,$safeeval,$style);
161: }
162: }
163: }
164: if (!$result) {
165: my $endtag='/'.$token->[1];
166: my $bodytext=&Apache::lonxml::get_all_text($endtag,$parser);
167: $$parser['-1']->get_token();
168: &Apache::lonxml::debug("Deleting :$bodytext: for $token->[1]");
169: &Apache::lonxml::end_tag($tagstack,$parstack,$token);
170: }
171: return 1;
172: }
173:
174: sub get_insert_list {
175: my ($tagname) = @_;
176: my $result='';
177: my @tagnums= ();
178: #&Apache::lonxml::debug("keys ".join("\n",sort(keys(%Apache::lonxml::insertlist))));
179: if ($Apache::lonxml::insertlist{"$tagname.which"}) {
180: push (@tagnums, @{ $Apache::lonxml::insertlist{"$tagname.which"} });
181: }
182: foreach my $namespace (@Apache::lonxml::namespace) {
183: if ($Apache::lonxml::insertlist{"$namespace".'::'."$tagname.which"}) {
184: push (@tagnums, @{ $Apache::lonxml::insertlist{"$namespace".'::'."$tagname.which"} });
185: }
186: }
187: if (@tagnums) {
188: my %options;
189: foreach my $tagnum (@tagnums) {
190: my $descrip=$Apache::lonxml::insertlist{"$tagnum.description"};
191: $options{$descrip} ="<option value=\"$tagnum\">".
192: $descrip."</option>\n";
193: }
194: foreach my $option (sort(keys(%options))) {$result.=$options{$option};}
195: if ($result) { $result='<option selected="on"></option>'.$result; }
196: }
197: return $result;
198: }
199:
200: sub insertlist {
201: my ($target,$token) = @_;
202: return &innerinsertlist($target,$token->[1]);
203: }
204:
205: sub innerinsertlist {
206: my ($target,$tagname,$closingtag) = @_;
207: my $result;
208: my $after='';
209: if ($closingtag) {
210: $after='_after_'.$closingtag;
211: }
212: if ($target eq 'edit') {
213: my $optionlist= &get_insert_list($tagname);
214: if ($optionlist) {
215: $result = "Insert:
216: <select name=\"insert$after\_$Apache::lonxml::curdepth\">
217: $optionlist
218: </select>"
219: } else {
220: $result=" ";
221: }
222: }
223: return $result;
224: }
225:
226: sub handle_insert {
227: if ($ENV{"form.insert_$Apache::lonxml::curdepth"} eq '') { return ''; }
228: my $result;
229: my $tagnum = $ENV{"form.insert_$Apache::lonxml::curdepth"};
230: my $func=$Apache::lonxml::insertlist{"$tagnum.function"};
231: if ($func eq 'default') {
232: my $newtag=$Apache::lonxml::insertlist{"$tagnum.tag"};
233: my $namespace;
234: if ($newtag =~ /::/) { ($namespace,$newtag) = split(/::/,$newtag); }
235: $result.="\n<$newtag>\n</$newtag>";
236: } else {
237: if (defined(&$func)) {
238: {
239: no strict 'refs';
240: $result.=&$func();
241: }
242: } else {
243: my $newtag=$Apache::lonxml::insertlist{"$tagnum.tag"};
244: &Apache::lonxml::error("Unable to insert tag $newtag, $func was not defined.");
245: }
246: }
247: return $result;
248: }
249:
250: sub handle_insertafter {
251: my $tagname=shift;
252: if ($ENV{"form.insert_after_$tagname\_$Apache::lonxml::curdepth"} eq '')
253: { return ''; }
254: my $result;
255: my $tagnum =$ENV{"form.insert_after_$tagname\_$Apache::lonxml::curdepth"};
256: my $func=$Apache::lonxml::insertlist{"$tagnum.function"};
257: if ($func eq 'default') {
258: my $newtag=$Apache::lonxml::insertlist{"$tagnum.tag"};
259: my $namespace;
260: if ($newtag =~ /::/) { ($namespace,$newtag) = split(/::/,$newtag); }
261: $result.="\n<$newtag>\n</$newtag>";
262: } else {
263: if (defined(&$func)) {
264: {
265: no strict 'refs';
266: $result.=&$func();
267: }
268: } else {
269: my $newtag=$Apache::lonxml::insertlist{"$tagnum.tag"};
270: &Apache::lonxml::error("Unable to insert (after) tag $newtag, $func was not defined. ($tagname $tagnum)");
271: }
272: }
273: return $result;
274: }
275:
276: sub insert_responseparam {
277: return '
278: <responseparam />';
279: }
280:
281: sub insert_formularesponse {
282: return '
283: <formularesponse answer="" samples="">
284: <textline />
285: <hintgroup>
286: </hintgroup>
287: </formularesponse>';
288: }
289:
290: sub insert_numericalresponse {
291: return '
292: <numericalresponse answer="">
293: <textline />
294: <hintgroup>
295: </hintgroup>
296: </numericalresponse>';
297: }
298:
299: sub insert_stringresponse {
300: return '
301: <stringresponse answer="" type="">
302: <textline />
303: <hintgroup>
304: </hintgroup>
305: </stringresponse>';
306: }
307:
308: sub insert_essayresponse {
309: return '
310: <essayresponse>
311: <textfield></textfield>
312: </essayresponse>';
313: }
314:
315: sub insert_imageresponse {
316: return '
317: <imageresponse max="1">
318: <foilgroup>
319: </foilgroup>
320: <hintgroup>
321: </hintgroup>
322: </imageresponse>';
323: }
324:
325: sub insert_optionresponse {
326: return '
327: <optionresponse max="10">
328: <foilgroup options="">
329: </foilgroup>
330: <hintgroup>
331: </hintgroup>
332: </optionresponse>';
333: }
334:
335: sub insert_radiobuttonresponse {
336: return '
337: <radiobuttonresponse max="10">
338: <foilgroup>
339: </foilgroup>
340: <hintgroup>
341: </hintgroup>
342: </radiobuttonresponse>';
343: }
344:
345: sub insert_rankresponse {
346: return '
347: <rankresponse max="10">
348: <foilgroup options="">
349: </foilgroup>
350: <hintgroup>
351: </hintgroup>
352: </rankresponse>';
353: }
354:
355: sub insert_matchresponse {
356: return '
357: <matchresponse max="10">
358: <foilgroup options="">
359: <itemgroup>
360: </itemgroup>
361: </foilgroup>
362: <hintgroup>
363: </hintgroup>
364: </matchresponse>';
365: }
366:
367: sub insert_displayduedate { return '<displayduedate />'; }
368: sub insert_displaytitle { return '<displaytitle />'; }
369: sub insert_hintpart {
370: return '
371: <hintpart on="default">
372: <startouttext/>
373: <endouttext />
374: </hintpart>';
375: }
376:
377: sub insert_numericalhint {
378: return '
379: <numericalhint>
380: </numericalhint>';
381: }
382:
383: sub insert_stringhint {
384: return '
385: <stringhint>
386: </stringhint>';
387: }
388:
389: sub insert_formulahint {
390: return '
391: <formulahint>
392: </formulahint>';
393: }
394:
395: sub insert_radiobuttonhint {
396: return '
397: <radiobuttonhint>
398: </radiobuttonhint>';
399: }
400:
401: sub insert_optionhint {
402: return '
403: <optionhint>
404: </optionhint>';
405: }
406:
407: sub insert_startouttext {
408: return "<startouttext />\n<endouttext />";
409: }
410:
411: sub insert_script {
412: return "\n<script type=\"loncapa/perl\">\n</script>";
413: }
414:
415: sub textarea_sizes {
416: my ($data)=@_;
417: my $count=0;
418: my $maxlength=-1;
419: foreach (split ("\n", $$data)) {
420: $count+=int(length($_)/79);
421: $count++;
422: if (length($_) > $maxlength) { $maxlength = length($_); }
423: }
424: my $rows = $count;
425: my $cols = $maxlength;
426: return ($rows,$cols);
427: }
428:
429: sub editline {
430: my ($tag,$data,$description,$size)=@_;
431: $data=&HTML::Entities::encode($data);
432: if ($description) { $description="<br />".$description."<br />"; }
433: my $result = <<"END";
434: $description
435: <input type="text" name="homework_edit_$Apache::lonxml::curdepth"
436: value="$data" size="$size" />
437: END
438: return $result;
439: }
440:
441: sub editfield {
442: my ($tag,$data,$description,$minwidth,$minheight)=@_;
443:
444: my ($rows,$cols)=&textarea_sizes(\$data);
445: if ($cols > 80) { $cols = 80; }
446: if ($cols < $minwidth ) { $cols = $minwidth; }
447: if ($rows < $minheight) { $rows = $minheight; }
448: if ($description) { $description="<br />".$description."<br />"; }
449: return $description."\n".' <textarea rows="'.$rows.
450: '" cols="'.$cols.'" name="homework_edit_'.
451: $Apache::lonxml::curdepth.'">'.
452: &HTML::Entities::encode($data).'</textarea>'."\n";
453: }
454:
455: sub modifiedfield {
456: my ($token) = @_;
457: my $result;
458: # foreach my $envkey (sort keys %ENV) {
459: # &Apache::lonxml::debug("$envkey ---- $ENV{$envkey}");
460: # }
461: # &Apache::lonxml::debug("I want homework_edit_$Apache::lonxml::curdepth");
462: # &Apache::lonxml::debug($ENV{"form.homework_edit_$Apache::lonxml::curdepth"});
463: $result=$ENV{"form.homework_edit_$Apache::lonxml::curdepth"};
464: return $result;
465: }
466:
467: # Returns a 1 if the token has been modified and you should rebuild the tag
468: # side-effects, will modify the $token if new values are found
469: sub get_new_args {
470: my ($token,$parstack,$safeeval,@args)=@_;
471: my $rebuild=0;
472: foreach my $arg (@args) {
473: #just want the string that it was set to
474: my $value=$token->[2]->{$arg};
475: my $element=&html_element_name($arg);
476: my $newvalue=$ENV{"form.$element"};
477: &Apache::lonxml::debug("for:$arg: cur is :$value: new is :$newvalue:");
478: if (defined($newvalue) && $value ne $newvalue) {
479: if (ref($newvalue) eq 'ARRAY') {
480: $token->[2]->{$arg}=join(',',@$newvalue);
481: } else {
482: $token->[2]->{$arg}=$newvalue;
483: }
484: $rebuild=1;
485: }
486: }
487: return $rebuild;
488: }
489:
490: # looks for /> on start tags
491: sub rebuild_tag {
492: my ($token) = @_;
493: my $result;
494: if ($token->[0] eq 'S') {
495: $result = '<'.$token->[1];
496: while (my ($key,$val)= each(%{$token->[2]})) {
497: $val=~s:^\s+|\s+$::g;
498: $val=~s:"::g; #"
499: &Apache::lonxml::debug("setting :$key: to :$val:");
500: $result.=' '.$key.'="'.$val.'"';
501: }
502: if ($token->[4] =~ m:/>$:) {
503: $result.=' />';
504: } else {
505: $result.='>';
506: }
507: } elsif ( $token->[0] eq 'E' ) {
508: $result = '</'.$token->[1].'>';
509: }
510: return $result;
511: }
512:
513: sub html_element_name {
514: my ($name) = @_;
515: return $name.'_'.$Apache::lonxml::curdepth;
516: }
517:
518: sub hidden_arg {
519: my ($name,$token) = @_;
520: my $result;
521: my $arg=$token->[2]{$name};
522: $result='<input name="'.&html_element_name($name).
523: '" type="hidden" value="'.$arg.'" />';
524: return $result;
525: }
526:
527: sub checked_arg {
528: my ($description,$name,$list,$token) = @_;
529: my $result;
530: my $optionlist="";
531: my $allselected=$token->[2]{$name};
532: $result=$description;
533: foreach my $option (@$list) {
534: my ($value,$text);
535: if ( ref($option) eq 'ARRAY') {
536: $value='value="'.$$option[0].'"';
537: $text=$$option[1];
538: $option=$$option[0];
539: } else {
540: $text=$option;
541: $value='value="'.$option.'"';
542: }
543: $result.="<nobr><input type='checkbox' $value name='".
544: &html_element_name($name)."'";
545: foreach my $selected (split(/,/,$allselected)) {
546: if ( $selected eq $option ) {
547: $result.=" checked='on' ";
548: last;
549: }
550: }
551: $result.=" />$text</nobr>\n";
552: }
553: return $result;
554: }
555:
556: sub text_arg {
557: my ($description,$name,$token,$size) = @_;
558: my $result;
559: if (!defined $size) { $size=20; }
560: my $arg=$token->[2]{$name};
561: $result=$description.' <input name="'.&html_element_name($name).
562: '" type="text" value="'.$arg.'" size="'.$size.'" />';
563: return '<nobr>'.$result.'</nobr>';
564: }
565:
566: sub select_arg {
567: my ($description,$name,$list,$token) = @_;
568: my $result;
569: my $optionlist="";
570: my $selected=$token->[2]{$name};
571: foreach my $option (@$list) {
572: my $value;
573: if ( ref($option) eq 'ARRAY') {
574: $value='value="'.$$option[0].'"';
575: $option=$$option[1];
576: } else {
577: $value='value="'.$option.'"';
578: }
579: if ( $selected eq $option ) {
580: $optionlist.="<option $value selected=\"on\">$option</option>\n";
581: } else {
582: $optionlist.="<option $value >$option</option>\n";
583: }
584: }
585: $result.='<nobr>'.$description.' <select name="'.
586: &html_element_name($name).'">
587: '.$optionlist.'
588: </select></nobr>';
589: return $result;
590: }
591:
592: sub select_or_text_arg {
593: my ($description,$name,$list,$token,$size) = @_;
594: my $result;
595: my $optionlist="";
596: my $found=0;
597: my $selected=$token->[2]{$name};
598: foreach my $option (@$list) {
599: my $value;
600: if ( ref($option) eq 'ARRAY') {
601: $value='value="'.$$option[0].'"';
602: $option=$$option[1];
603: } else {
604: $value='value="'.$option.'"';
605: }
606: if ( $selected eq $option ) {
607: $optionlist.="<option $value selected=\"on\">$option</option>\n";
608: $found=1;
609: } else {
610: $optionlist.="<option $value>$option</option>\n";
611: }
612: }
613: $optionlist.="<option value=\"TYPEDINVALUE\"".
614: ((!$found)?' selected="on"':'').
615: ">Type in value</option>\n";
616: #
617: my $element=&html_element_name($name);
618: my $selectelement='select_list_'.$element;
619: my $typeinelement='type_in_'.$element;
620: my $typeinvalue=($found?'':$selected);
621: #
622: my $hiddenvalue='this.form.'.$element.'.value';
623: my $selectedindex='this.form.'.$selectelement.'.selectedIndex';
624: my $selectedvalue='this.form.'.$selectelement.
625: '.options['.$selectedindex.'].value';
626: my $typedinvalue='this.form.'.$typeinelement.'.value';
627: my $selecttypeinindex='this.form.'.$selectelement.'.options.length';
628: #
629: return (<<ENDSELECTORTYPE);
630: <nobr>
631: $description
632: <select name="$selectelement"
633: onChange="if ($selectedvalue!='TYPEDINVALUE') { $hiddenvalue=$selectedvalue; $typedinvalue=''; }"
634: $optionlist
635: </select>
636: <input type="text" size="$size" name="$typeinelement"
637: value="$typeinvalue"
638: onChange="$hiddenvalue=$typedinvalue;"
639: onFocus="$selectedindex=$selecttypeinindex-1;" />
640: <input type="hidden" name="$element" value="$selected" />
641: </nobr>
642: ENDSELECTORTYPE
643: }
644:
645: #----------------------------------------------------- image coordinates
646: # single image coordinates, x, y
647: sub entercoords {
648: my ($idx,,$idy,$mode,$width,$height) = @_;
649: unless ($Apache::edit::bgimgsrc) { return ''; }
650: if ($idx) { $idx.='_'; }
651: if ($idy) { $idy.='_'; }
652: my $bgfile=&Apache::lonnet::escape($Apache::edit::bgimgsrc);
653: my $form = 'lonhomework';
654: my $element;
655: if (! defined($mode) || $mode eq 'attribute') {
656: $element = &Apache::lonnet::escape("$Apache::lonxml::curdepth");
657: } elsif ($mode eq 'textnode') { # for data between <tag> ... </tag>
658: $element = &Apache::lonnet::escape('homework_edit_'.
659: $Apache::lonxml::curdepth);
660: }
661: my $formheight='';
662: if ($height) {
663: $formheight='&formheight='.$height.'_'.$Apache::edit::bgimgsrccurdepth;
664: }
665: my $formwidth='';
666: if ($width) {
667: $formwidth='&formwidth='.$width.'_'.$Apache::edit::bgimgsrccurdepth;
668: }
669: my $result = <<"ENDBUTTON";
670: <a href="/cgi-bin/imagechoice.pl?formname=$form&file=$bgfile&formx=$idx$element&formy=$idy$element$formheight$formwidth"
671: target="imagechoice">Click Coordinates</a>
672: ENDBUTTON
673: return $result;
674: }
675:
676: # coordinate pair (x1,y1)-(x2,y2)
677: sub entercoordpair {
678: my ($id,$mode,$width,$height) = @_;
679: unless ($Apache::edit::bgimgsrc) { return ''; }
680: my $bgfile=&Apache::lonnet::escape($Apache::edit::bgimgsrc);
681: my $form = 'lonhomework';
682: my $element;
683: if (! defined($mode) || $mode eq 'attribute') {
684: $element = &Apache::lonnet::escape("$id\_$Apache::lonxml::curdepth");
685: } elsif ($mode eq 'textnode') { # for data between <tag> ... </tag>
686: $element = &Apache::lonnet::escape('homework_edit_'.
687: $Apache::lonxml::curdepth);
688: }
689: my $formheight='';
690: if ($height) {
691: $formheight='&formheight='.$height.'_'.$Apache::edit::bgimgsrccurdepth;
692: }
693: my $formwidth='';
694: if ($width) {
695: $formwidth='&formwidth='.$width.'_'.$Apache::edit::bgimgsrccurdepth;
696: }
697: my $result = <<"ENDBUTTON";
698: <a href="/cgi-bin/imagechoice.pl?mode=pair&formname=$form&file=$bgfile$formheight$formwidth&formcoord=$element"
699: target="imagechoice">Click Coordinate Pair</a>
700: ENDBUTTON
701: return $result;
702: }
703: #----------------------------------------------------- browse
704: sub browse {
705: # insert a link to call up the filesystem browser (lonindexer)
706: my ($id, $mode) = @_;
707: my $form = 'lonhomework';
708: my $element;
709: if (! defined($mode) || $mode eq 'attribute') {
710: $element = &Apache::lonnet::escape("$id\_$Apache::lonxml::curdepth");
711: } elsif ($mode eq 'textnode') { # for data between <tag> ... </tag>
712: $element = &Apache::lonnet::escape('homework_edit_'.
713: $Apache::lonxml::curdepth);
714: }
715: my $result = <<"ENDBUTTON";
716: <a href=\"javascript:openbrowser('$form','$element')\"\>Select</a>
717: ENDBUTTON
718: return $result;
719: }
720:
721: #----------------------------------------------------- browse
722: sub search {
723: # insert a link to call up the filesystem browser (lonindexer)
724: my ($id, $mode) = @_;
725: my $form = 'lonhomework';
726: my $element;
727: if (! defined($mode) || $mode eq 'attribute') {
728: $element = &Apache::lonnet::escape("$id\_$Apache::lonxml::curdepth");
729: } elsif ($mode eq 'textnode') { # for data between <tag> ... </tag>
730: $element = &Apache::lonnet::escape('homework_edit_'.
731: $Apache::lonxml::curdepth);
732: }
733: my $result = <<"ENDBUTTON";
734: <a href=\"javascript:opensearcher('$form','$element')\"\>Search</a>
735: ENDBUTTON
736: return $result;
737: }
738:
739:
740: 1;
741: __END__
742:
743: =head1 NAME
744:
745: Apache::edit - edit mode helpers
746:
747: =head1 SYNOPSIS
748:
749: Invoked by many homework and xml related modules.
750:
751: &Apache::edit::SUBROUTINENAME(ARGUMENTS);
752:
753: =head1 INTRODUCTION
754:
755: This module outputs HTML syntax helpful for the rendering of edit
756: mode interfaces.
757:
758: This is part of the LearningOnline Network with CAPA project
759: described at http://www.lon-capa.org.
760:
761: =head1 HANDLER SUBROUTINE
762:
763: There is no handler subroutine.
764:
765: =head1 OTHER SUBROUTINES
766:
767: =over 4
768:
769: =item *
770:
771: initialize_edit() : initialize edit (set colordepth to zero)
772:
773: =item *
774:
775: tag_start($target,$token,$description) : provide deletion and insertion lists
776: for the manipulation of a start tag; return a scalar string
777:
778: =item *
779:
780: tag_end($target,$token,$description) : ending syntax corresponding to
781: &tag_start. return a scalar string.
782:
783: =item *
784:
785: start_table($token) : start table; update colordepth; return scalar string.
786:
787: =item *
788:
789: end_table() : reduce color depth; end table; return scalar string
790:
791: =item *
792:
793: start_spanning_row() : start a new table row spanning the 'edit' environment.
794:
795: =item *
796:
797: start_row() : start a new table row and element.
798:
799: =item *
800:
801: end_row() : end current table element and row.
802:
803: =item *
804:
805: movebuttons($target,$token) : move-up and move-down buttons; return scalar
806: string
807:
808: =item *
809:
810: deletelist($target,$token) : provide a yes option in an HTML select element;
811: return scalar string
812:
813: =item *
814:
815: handle_delete($space,$target,$token,$tagstack,$parstack,$parser,$safeeval,
816: $style) : respond to a user delete request by passing relevant stack
817: and array information to various rendering functions; return a scalar string
818:
819: =item *
820:
821: get_insert_list($token) : provide an insertion list based on possibilities
822: from lonxml; return a scalar string
823:
824: =item *
825:
826: insertlist($target,$token) : api that uses get_insert_list;
827: return a scalar string
828:
829: =item *
830:
831: handleinsert($token) : provide an insertion list based on possibilities
832: from lonxml; return a scalar string
833:
834: =item *
835:
836: get_insert_list($token) : provide an insertion list based on possibilities
837: from lonxml; return a scalar string
838:
839: =item *
840: browse($elementname) : provide a link which will open up the filesystem
841: browser (lonindexer) and, once a file is selected, place the result in
842: the form element $elementname.
843:
844: =item *
845: search($elementname) : provide a link which will open up the filesystem
846: searcher (lonsearchcat) and, once a file is selected, place the result in
847: the form element $elementname.
848:
849: =item *
850: editline(tag,data,description,size): Provide a <input type="text" ../> for
851: single-line text entry. This is to be used for text enclosed by tags, not
852: arguements/parameters associated with a tag.
853:
854: =back
855:
856: incomplete...
857:
858: =cut
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