1: # The LearningOnline Network with CAPA
2: # edit mode helpers
3: #
4: # $Id: edit.pm,v 1.68 2003/10/24 21:09:24 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: <startouttext/>
287: <endouttext />
288: </hintgroup>
289: </formularesponse>';
290: }
291:
292: sub insert_numericalresponse {
293: return '
294: <numericalresponse answer="">
295: <textline />
296: <hintgroup>
297: <startouttext/>
298: <endouttext />
299: </hintgroup>
300: </numericalresponse>';
301: }
302:
303: sub insert_stringresponse {
304: return '
305: <stringresponse answer="" type="">
306: <textline />
307: <hintgroup>
308: <startouttext/>
309: <endouttext />
310: </hintgroup>
311: </stringresponse>';
312: }
313:
314: sub insert_essayresponse {
315: return '
316: <essayresponse>
317: <textfield></textfield>
318: </essayresponse>';
319: }
320:
321: sub insert_imageresponse {
322: return '
323: <imageresponse max="1">
324: <foilgroup>
325: </foilgroup>
326: <hintgroup>
327: <startouttext/>
328: <endouttext />
329: </hintgroup>
330: </imageresponse>';
331: }
332:
333: sub insert_optionresponse {
334: return '
335: <optionresponse max="10">
336: <foilgroup options="">
337: </foilgroup>
338: <hintgroup>
339: <startouttext/>
340: <endouttext />
341: </hintgroup>
342: </optionresponse>';
343: }
344:
345: sub insert_radiobuttonresponse {
346: return '
347: <radiobuttonresponse max="10">
348: <foilgroup>
349: </foilgroup>
350: <hintgroup>
351: <startouttext/>
352: <endouttext />
353: </hintgroup>
354: </radiobuttonresponse>';
355: }
356:
357: sub insert_rankresponse {
358: return '
359: <rankresponse max="10">
360: <foilgroup options="">
361: </foilgroup>
362: <hintgroup>
363: <startouttext/>
364: <endouttext />
365: </hintgroup>
366: </rankresponse>';
367: }
368:
369: sub insert_matchresponse {
370: return '
371: <matchresponse max="10">
372: <foilgroup options="">
373: <itemgroup>
374: </itemgroup>
375: </foilgroup>
376: <hintgroup>
377: <startouttext/>
378: <endouttext />
379: </hintgroup>
380: </matchresponse>';
381: }
382:
383: sub insert_displayduedate { return '<displayduedate />'; }
384: sub insert_displaytitle { return '<displaytitle />'; }
385: sub insert_hintpart {
386: return '
387: <hintpart on="default">
388: <startouttext/>
389: <endouttext />
390: </hintpart>';
391: }
392:
393: sub insert_hintgroup {
394: return '
395: <hintgroup>
396: <startouttext/>
397: <endouttext />
398: </hintgroup>';
399: }
400:
401: sub insert_numericalhint {
402: return '
403: <numericalhint>
404: </numericalhint>';
405: }
406:
407: sub insert_stringhint {
408: return '
409: <stringhint>
410: </stringhint>';
411: }
412:
413: sub insert_formulahint {
414: return '
415: <formulahint>
416: </formulahint>';
417: }
418:
419: sub insert_radiobuttonhint {
420: return '
421: <radiobuttonhint>
422: </radiobuttonhint>';
423: }
424:
425: sub insert_optionhint {
426: return '
427: <optionhint>
428: </optionhint>';
429: }
430:
431: sub insert_startouttext {
432: return "<startouttext />\n<endouttext />";
433: }
434:
435: sub insert_script {
436: return "\n<script type=\"loncapa/perl\">\n</script>";
437: }
438:
439: sub textarea_sizes {
440: my ($data)=@_;
441: my $count=0;
442: my $maxlength=-1;
443: foreach (split ("\n", $$data)) {
444: $count+=int(length($_)/79);
445: $count++;
446: if (length($_) > $maxlength) { $maxlength = length($_); }
447: }
448: my $rows = $count;
449: my $cols = $maxlength;
450: return ($rows,$cols);
451: }
452:
453: sub editline {
454: my ($tag,$data,$description,$size)=@_;
455: $data=&HTML::Entities::encode($data);
456: if ($description) { $description="<br />".$description."<br />"; }
457: my $result = <<"END";
458: $description
459: <input type="text" name="homework_edit_$Apache::lonxml::curdepth"
460: value="$data" size="$size" />
461: END
462: return $result;
463: }
464:
465: sub editfield {
466: my ($tag,$data,$description,$minwidth,$minheight)=@_;
467:
468: my ($rows,$cols)=&textarea_sizes(\$data);
469: if ($cols > 80) { $cols = 80; }
470: if ($cols < $minwidth ) { $cols = $minwidth; }
471: if ($rows < $minheight) { $rows = $minheight; }
472: if ($description) { $description="<br />".$description."<br />"; }
473: return $description."\n".' <textarea rows="'.$rows.
474: '" cols="'.$cols.'" name="homework_edit_'.
475: $Apache::lonxml::curdepth.'">'.
476: &HTML::Entities::encode($data).'</textarea>'."\n";
477: }
478:
479: sub modifiedfield {
480: my ($token) = @_;
481: my $result;
482: # foreach my $envkey (sort keys %ENV) {
483: # &Apache::lonxml::debug("$envkey ---- $ENV{$envkey}");
484: # }
485: # &Apache::lonxml::debug("I want homework_edit_$Apache::lonxml::curdepth");
486: # &Apache::lonxml::debug($ENV{"form.homework_edit_$Apache::lonxml::curdepth"});
487: $result=$ENV{"form.homework_edit_$Apache::lonxml::curdepth"};
488: return $result;
489: }
490:
491: # Returns a 1 if the token has been modified and you should rebuild the tag
492: # side-effects, will modify the $token if new values are found
493: sub get_new_args {
494: my ($token,$parstack,$safeeval,@args)=@_;
495: my $rebuild=0;
496: foreach my $arg (@args) {
497: #just want the string that it was set to
498: my $value=$token->[2]->{$arg};
499: my $element=&html_element_name($arg);
500: my $newvalue=$ENV{"form.$element"};
501: &Apache::lonxml::debug("for:$arg: cur is :$value: new is :$newvalue:");
502: if (defined($newvalue) && $value ne $newvalue) {
503: if (ref($newvalue) eq 'ARRAY') {
504: $token->[2]->{$arg}=join(',',@$newvalue);
505: } else {
506: $token->[2]->{$arg}=$newvalue;
507: }
508: $rebuild=1;
509: }
510: }
511: return $rebuild;
512: }
513:
514: # looks for /> on start tags
515: sub rebuild_tag {
516: my ($token) = @_;
517: my $result;
518: if ($token->[0] eq 'S') {
519: $result = '<'.$token->[1];
520: while (my ($key,$val)= each(%{$token->[2]})) {
521: $val=~s:^\s+|\s+$::g;
522: $val=~s:"::g; #"
523: &Apache::lonxml::debug("setting :$key: to :$val:");
524: $result.=' '.$key.'="'.$val.'"';
525: }
526: if ($token->[4] =~ m:/>$:) {
527: $result.=' />';
528: } else {
529: $result.='>';
530: }
531: } elsif ( $token->[0] eq 'E' ) {
532: $result = '</'.$token->[1].'>';
533: }
534: return $result;
535: }
536:
537: sub html_element_name {
538: my ($name) = @_;
539: return $name.'_'.$Apache::lonxml::curdepth;
540: }
541:
542: sub hidden_arg {
543: my ($name,$token) = @_;
544: my $result;
545: my $arg=$token->[2]{$name};
546: $result='<input name="'.&html_element_name($name).
547: '" type="hidden" value="'.$arg.'" />';
548: return $result;
549: }
550:
551: sub checked_arg {
552: my ($description,$name,$list,$token) = @_;
553: my $result;
554: my $optionlist="";
555: my $allselected=$token->[2]{$name};
556: $result=$description;
557: foreach my $option (@$list) {
558: my ($value,$text);
559: if ( ref($option) eq 'ARRAY') {
560: $value='value="'.$$option[0].'"';
561: $text=$$option[1];
562: $option=$$option[0];
563: } else {
564: $text=$option;
565: $value='value="'.$option.'"';
566: }
567: $result.="<nobr><input type='checkbox' $value name='".
568: &html_element_name($name)."'";
569: foreach my $selected (split(/,/,$allselected)) {
570: if ( $selected eq $option ) {
571: $result.=" checked='on' ";
572: last;
573: }
574: }
575: $result.=" />$text</nobr>\n";
576: }
577: return $result;
578: }
579:
580: sub text_arg {
581: my ($description,$name,$token,$size) = @_;
582: my $result;
583: if (!defined $size) { $size=20; }
584: my $arg=$token->[2]{$name};
585: $result=$description.' <input name="'.&html_element_name($name).
586: '" type="text" value="'.$arg.'" size="'.$size.'" />';
587: return '<nobr>'.$result.'</nobr>';
588: }
589:
590: sub select_arg {
591: my ($description,$name,$list,$token) = @_;
592: my $result;
593: my $optionlist="";
594: my $selected=$token->[2]{$name};
595: foreach my $option (@$list) {
596: my ($text,$value);
597: if ( ref($option) eq 'ARRAY') {
598: $value='value="'.$$option[0].'"';
599: $text=$$option[1];
600: $option=$$option[0];
601: } else {
602: $text=$option;
603: $value='value="'.$option.'"';
604: }
605: if ( $selected eq $option ) {
606: $optionlist.="<option $value selected=\"on\">$text</option>\n";
607: } else {
608: $optionlist.="<option $value >$text</option>\n";
609: }
610: }
611: $result.='<nobr>'.$description.' <select name="'.
612: &html_element_name($name).'">
613: '.$optionlist.'
614: </select></nobr>';
615: return $result;
616: }
617:
618: sub select_or_text_arg {
619: my ($description,$name,$list,$token,$size) = @_;
620: my $result;
621: my $optionlist="";
622: my $found=0;
623: my $selected=$token->[2]{$name};
624: foreach my $option (@$list) {
625: my ($text,$value);
626: if ( ref($option) eq 'ARRAY') {
627: $value='value="'.$$option[0].'"';
628: $text=$$option[1];
629: $option=$$option[0];
630: } else {
631: $text=$option;
632: $value='value="'.$option.'"';
633: }
634: if ( $selected eq $option ) {
635: $optionlist.="<option $value selected=\"on\">$text</option>\n";
636: $found=1;
637: } else {
638: $optionlist.="<option $value>$text</option>\n";
639: }
640: }
641: $optionlist.="<option value=\"TYPEDINVALUE\"".
642: ((!$found)?' selected="on"':'').
643: ">Type in value</option>\n";
644: #
645: my $element=&html_element_name($name);
646: my $selectelement='select_list_'.$element;
647: my $typeinelement='type_in_'.$element;
648: my $typeinvalue=($found?'':$selected);
649: #
650: my $hiddenvalue='this.form.'.$element.'.value';
651: my $selectedindex='this.form.'.$selectelement.'.selectedIndex';
652: my $selectedvalue='this.form.'.$selectelement.
653: '.options['.$selectedindex.'].value';
654: my $typedinvalue='this.form.'.$typeinelement.'.value';
655: my $selecttypeinindex='this.form.'.$selectelement.'.options.length';
656: #
657: return (<<ENDSELECTORTYPE);
658: <nobr>
659: $description
660: <select name="$selectelement"
661: onChange="if ($selectedvalue!='TYPEDINVALUE') { $hiddenvalue=$selectedvalue; $typedinvalue=''; }"
662: $optionlist
663: </select>
664: <input type="text" size="$size" name="$typeinelement"
665: value="$typeinvalue"
666: onChange="$hiddenvalue=$typedinvalue;"
667: onFocus="$selectedindex=$selecttypeinindex-1;" />
668: <input type="hidden" name="$element" value="$selected" />
669: </nobr>
670: ENDSELECTORTYPE
671: }
672:
673: #----------------------------------------------------- image coordinates
674: # single image coordinates, x, y
675: sub entercoords {
676: my ($idx,,$idy,$mode,$width,$height) = @_;
677: unless ($Apache::edit::bgimgsrc) { return ''; }
678: if ($idx) { $idx.='_'; }
679: if ($idy) { $idy.='_'; }
680: my $bgfile=&Apache::lonnet::escape($Apache::edit::bgimgsrc);
681: my $form = 'lonhomework';
682: my $element;
683: if (! defined($mode) || $mode eq 'attribute') {
684: $element = &Apache::lonnet::escape("$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 $result = <<"ENDBUTTON";
698: <a href="/cgi-bin/imagechoice.pl?formname=$form&file=$bgfile&formx=$idx$element&formy=$idy$element$formheight$formwidth"
699: target="imagechoice">Click Coordinates</a>
700: ENDBUTTON
701: return $result;
702: }
703:
704: # coordinate pair (x1,y1)-(x2,y2)
705: sub entercoordpair {
706: my ($id,$mode,$width,$height) = @_;
707: unless ($Apache::edit::bgimgsrc) { return ''; }
708: my $bgfile=&Apache::lonnet::escape($Apache::edit::bgimgsrc);
709: my $form = 'lonhomework';
710: my $element;
711: if (! defined($mode) || $mode eq 'attribute') {
712: $element = &Apache::lonnet::escape("$id\_$Apache::lonxml::curdepth");
713: } elsif ($mode eq 'textnode') { # for data between <tag> ... </tag>
714: $element = &Apache::lonnet::escape('homework_edit_'.
715: $Apache::lonxml::curdepth);
716: }
717: my $formheight='';
718: if ($height) {
719: $formheight='&formheight='.$height.'_'.$Apache::edit::bgimgsrccurdepth;
720: }
721: my $formwidth='';
722: if ($width) {
723: $formwidth='&formwidth='.$width.'_'.$Apache::edit::bgimgsrccurdepth;
724: }
725: my $result = <<"ENDBUTTON";
726: <a href="/cgi-bin/imagechoice.pl?mode=pair&formname=$form&file=$bgfile$formheight$formwidth&formcoord=$element"
727: target="imagechoice">Click Coordinate Pair</a>
728: ENDBUTTON
729: return $result;
730: }
731: #----------------------------------------------------- browse
732: sub browse {
733: # insert a link to call up the filesystem browser (lonindexer)
734: my ($id, $mode, $titleid) = @_;
735: my $form = 'lonhomework';
736: my $element;
737: if (! defined($mode) || $mode eq 'attribute') {
738: $element = &Apache::lonnet::escape("$id\_$Apache::lonxml::curdepth");
739: } elsif ($mode eq 'textnode') { # for data between <tag> ... </tag>
740: $element = &Apache::lonnet::escape('homework_edit_'.
741: $Apache::lonxml::curdepth);
742: }
743: my $titleelement;
744: if ($titleid) {
745: $titleelement=",'','','".&Apache::lonnet::escape("$titleid\_$Apache::lonxml::curdepth")."'";
746: }
747: my $result = <<"ENDBUTTON";
748: <a href=\"javascript:openbrowser('$form','$element'$titleelement)\"\>Select</a>
749: ENDBUTTON
750: return $result;
751: }
752:
753: #----------------------------------------------------- browse
754: sub search {
755: # insert a link to call up the filesystem browser (lonindexer)
756: my ($id, $mode, $titleid) = @_;
757: my $form = 'lonhomework';
758: my $element;
759: if (! defined($mode) || $mode eq 'attribute') {
760: $element = &Apache::lonnet::escape("$id\_$Apache::lonxml::curdepth");
761: } elsif ($mode eq 'textnode') { # for data between <tag> ... </tag>
762: $element = &Apache::lonnet::escape('homework_edit_'.
763: $Apache::lonxml::curdepth);
764: }
765: my $titleelement;
766: if ($titleid) {
767: $titleelement=",'".&Apache::lonnet::escape("$titleid\_$Apache::lonxml::curdepth")."'";
768: }
769: my $result = <<"ENDBUTTON";
770: <a href=\"javascript:opensearcher('$form','$element'$titleelement)\"\>Search</a>
771: ENDBUTTON
772: return $result;
773: }
774:
775:
776: 1;
777: __END__
778:
779: =head1 NAME
780:
781: Apache::edit - edit mode helpers
782:
783: =head1 SYNOPSIS
784:
785: Invoked by many homework and xml related modules.
786:
787: &Apache::edit::SUBROUTINENAME(ARGUMENTS);
788:
789: =head1 INTRODUCTION
790:
791: This module outputs HTML syntax helpful for the rendering of edit
792: mode interfaces.
793:
794: This is part of the LearningOnline Network with CAPA project
795: described at http://www.lon-capa.org.
796:
797: =head1 HANDLER SUBROUTINE
798:
799: There is no handler subroutine.
800:
801: =head1 OTHER SUBROUTINES
802:
803: =over 4
804:
805: =item *
806:
807: initialize_edit() : initialize edit (set colordepth to zero)
808:
809: =item *
810:
811: tag_start($target,$token,$description) : provide deletion and insertion lists
812: for the manipulation of a start tag; return a scalar string
813:
814: =item *
815:
816: tag_end($target,$token,$description) : ending syntax corresponding to
817: &tag_start. return a scalar string.
818:
819: =item *
820:
821: start_table($token) : start table; update colordepth; return scalar string.
822:
823: =item *
824:
825: end_table() : reduce color depth; end table; return scalar string
826:
827: =item *
828:
829: start_spanning_row() : start a new table row spanning the 'edit' environment.
830:
831: =item *
832:
833: start_row() : start a new table row and element.
834:
835: =item *
836:
837: end_row() : end current table element and row.
838:
839: =item *
840:
841: movebuttons($target,$token) : move-up and move-down buttons; return scalar
842: string
843:
844: =item *
845:
846: deletelist($target,$token) : provide a yes option in an HTML select element;
847: return scalar string
848:
849: =item *
850:
851: handle_delete($space,$target,$token,$tagstack,$parstack,$parser,$safeeval,
852: $style) : respond to a user delete request by passing relevant stack
853: and array information to various rendering functions; return a scalar string
854:
855: =item *
856:
857: get_insert_list($token) : provide an insertion list based on possibilities
858: from lonxml; return a scalar string
859:
860: =item *
861:
862: insertlist($target,$token) : api that uses get_insert_list;
863: return a scalar string
864:
865: =item *
866:
867: handleinsert($token) : provide an insertion list based on possibilities
868: from lonxml; return a scalar string
869:
870: =item *
871:
872: get_insert_list($token) : provide an insertion list based on possibilities
873: from lonxml; return a scalar string
874:
875: =item *
876: browse($elementname) : provide a link which will open up the filesystem
877: browser (lonindexer) and, once a file is selected, place the result in
878: the form element $elementname.
879:
880: =item *
881: search($elementname) : provide a link which will open up the filesystem
882: searcher (lonsearchcat) and, once a file is selected, place the result in
883: the form element $elementname.
884:
885: =item *
886: editline(tag,data,description,size): Provide a <input type="text" ../> for
887: single-line text entry. This is to be used for text enclosed by tags, not
888: arguements/parameters associated with a tag.
889:
890: =back
891:
892: incomplete...
893:
894: =cut
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