1: # The LearningOnline Network with CAPA
2: # edit mode helpers
3: #
4: # $Id: edit.pm,v 1.105 2007/02/18 02:00:59 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:
29: package Apache::edit;
30:
31: use strict;
32: use Apache::lonnet;
33: use HTML::Entities();
34: use Apache::lonlocal;
35: use lib '/home/httpd/lib/perl/';
36: use LONCAPA;
37:
38:
39: # Global Vars
40: # default list of colors to use in editing
41: @Apache::edit::colorlist=('#ffffff','#ff0000','#00ff00','#0000ff','#0ff000','#000ff0','#f0000f');
42: # depth of nesting of edit
43: $Apache::edit::colordepth=0;
44: @Apache::edit::inserttag=();
45: # image-type responses: active background image and curdepth at definition
46: $Apache::edit::bgimgsrc='';
47: $Apache::edit::bgimgsrccurdepth='';
48:
49: sub initialize_edit {
50: $Apache::edit::colordepth=0;
51: @Apache::edit::inserttag=();
52: }
53:
54: sub tag_start {
55: my ($target,$token,$description) = @_;
56: my $result='';
57: if ($target eq "edit") {
58: my $tag=$token->[1];
59: if (!$description) {
60: $description=&Apache::lonxml::description($token);
61: if (!$description) { $description="<$tag>"; }
62: }
63: $result.= &start_table($token)."<tr><td>$description</td>
64: <td>Delete".
65: &deletelist($target,$token)
66: ."</td>
67: <td>".
68: &insertlist($target,$token);
69: #<td>".
70: # &movebuttons($target,$token).
71: # "</tr><tr><td colspan=\"3\">\n";
72: my @help = Apache::lonxml::helpinfo($token);
73: if ($help[0]) {
74: $result .= '</td><td align="right" valign="top">' .
75: Apache::loncommon::help_open_topic(@help);
76: } else { $result .= "</td><td> "; }
77: $result .= &end_row().&start_spanning_row();
78: }
79: return $result;
80: }
81:
82: sub tag_end {
83: my ($target,$token,$description) = @_;
84: my $result='';
85: if ($target eq 'edit') {
86: $result.="</td></tr>".&end_table()."\n";
87: }
88: return $result;
89: }
90:
91: sub start_table {
92: my ($token)=@_;
93: my $tag = &Apache::lonxml::get_tag($token);
94:
95: my $color = $Apache::lonxml::insertlist{"$tag.color"};
96: &Apache::lonxml::debug(" $tag -- $color");
97: if (!defined($color)) {
98: $color = $Apache::edit::colorlist[$Apache::edit::colordepth];
99: }
100: $Apache::edit::colordepth++;
101: push(@Apache::edit::inserttag,$token->[1]);
102: my $result='<div align="right">';
103: $result.='<table bgcolor="'.$color.'" width="97%" border="0" cellspacing="5" cellpadding="3">';
104: return $result;
105: }
106:
107: sub end_table {
108: $Apache::edit::colordepth--;
109: my $result='</table></div>';
110: $result.='<div align="left"><table><tr><td>';
111:
112: my ($tagname,$closingtag);
113: if (defined($Apache::edit::inserttag[-2])) {
114: $tagname=$Apache::edit::inserttag[-2];
115: } else {
116: if ($Apache::lonhomework::parsing_a_task) {
117: $tagname='Task';
118: } else {
119: $tagname='problem';
120: }
121: }
122: if (defined($Apache::edit::inserttag[-1])) {
123: $closingtag=$Apache::edit::inserttag[-1];
124: }
125: $result.=&innerinsertlist('edit',$tagname,$closingtag).
126: "</td></tr></table></div>";
127: my $last = pop(@Apache::edit::inserttag);
128: return $result;
129: }
130:
131: sub start_spanning_row { return '<tr><td colspan="4" bgcolor="#DDDDDD">';}
132: sub start_row { return '<tr><td bgcolor="#DDDDDD">'; }
133: sub end_row { return '</td></tr>'; }
134:
135: sub movebuttons {
136: my ($target,$token) = @_;
137: my $result='<input type="submit" name="moveup.'.
138: $Apache::lonxml::curdepth.'" value="Move Up" />';
139: $result.='<input type="submit" name="movedown.'.
140: $Apache::lonxml::curdepth.'" value="Move Down" />';
141: return $result;
142: }
143:
144: sub deletelist {
145: my ($target,$token) = @_;
146: my $result = "<select name=\"delete_$Apache::lonxml::curdepth\">
147: <option></option>
148: <option>Yes</option>
149: </select>";
150: return $result;
151: }
152:
153: sub handle_delete {
154: if (!$env{"form.delete_$Apache::lonxml::curdepth"}) { return ''; }
155: my ($space,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
156: my $result=0;
157: if ($space) {
158: my $sub1="$space\:\:delete_$token->[1]";
159: {
160: no strict 'refs';
161: if (defined &$sub1) {
162: $result=&$sub1($target,$token,$tagstack,$parstack,$parser,$safeeval,$style);
163: }
164: }
165: }
166: if (!$result) {
167: my $endtag='/'.$token->[1];
168: my $bodytext=&Apache::lonxml::get_all_text($endtag,$parser,$style);
169: $$parser['-1']->get_token();
170: &Apache::lonxml::debug("Deleting :$bodytext: for $token->[1]");
171: &Apache::lonxml::end_tag($tagstack,$parstack,$token);
172: }
173: return 1;
174: }
175:
176: sub get_insert_list {
177: my ($tagname) = @_;
178: my $result='';
179: my @tags= ();
180: #&Apache::lonxml::debug("keys ".join("\n",sort(keys(%Apache::lonxml::insertlist))));
181: if ($Apache::lonxml::insertlist{"$tagname.which"}) {
182: push (@tags, @{ $Apache::lonxml::insertlist{"$tagname.which"} });
183: }
184: foreach my $namespace (@Apache::lonxml::namespace) {
185: if ($Apache::lonxml::insertlist{"$namespace".'::'."$tagname.which"}) {
186: push (@tags, @{ $Apache::lonxml::insertlist{"$namespace".'::'."$tagname.which"} });
187: }
188: }
189: if (@tags) {
190: my %options;
191: foreach my $tag (@tags) {
192: my $descrip=$Apache::lonxml::insertlist{"$tag.description"};
193: my $tagnum =$Apache::lonxml::insertlist{"$tag.num"};
194: $options{$descrip} ="<option value=\"$tagnum\">".
195: $descrip."</option>\n";
196: }
197: foreach my $option (sort(keys(%options))) {$result.=$options{$option};}
198: if ($result) { $result='<option selected="selected"></option>'.$result; }
199: }
200: return $result;
201: }
202:
203: sub insertlist {
204: my ($target,$token) = @_;
205: return &innerinsertlist($target,$token->[1]);
206: }
207:
208: sub innerinsertlist {
209: my ($target,$tagname,$closingtag) = @_;
210: my $result;
211: my $after='';
212: if ($closingtag) {
213: $after='_after_'.$closingtag;
214: }
215: if ($target eq 'edit') {
216: my $optionlist= &get_insert_list($tagname);
217: if ($optionlist) {
218: $result = "Insert:
219: <select name=\"insert$after\_$Apache::lonxml::curdepth\">
220: $optionlist
221: </select>"
222: } else {
223: $result=" ";
224: }
225: }
226: return $result;
227: }
228:
229: sub handle_insert {
230: if ($env{"form.insert_$Apache::lonxml::curdepth"} eq '') { return ''; }
231: my $tagnum = $env{"form.insert_$Apache::lonxml::curdepth"};
232: return &do_insert($tagnum);
233: }
234:
235: sub handle_insertafter {
236: my $tagname=shift;
237: if ($env{"form.insert_after_$tagname\_$Apache::lonxml::curdepth"} eq '') {
238: return '';
239: }
240: my $tagnum =$env{"form.insert_after_$tagname\_$Apache::lonxml::curdepth"};
241: return &do_insert($tagnum,1);
242: }
243:
244: sub do_insert {
245: my ($tagnum,$after) = @_;
246: my $result;
247:
248: my $newtag = $Apache::lonxml::insertlist{"$tagnum.tag"};
249: my $func = $Apache::lonxml::insertlist{"$newtag.function"};
250: if ($func eq 'default') {
251: my $namespace;
252: if ($newtag =~ /::/) { ($namespace,$newtag) = split(/::/,$newtag); }
253: my $depth = scalar(@Apache::lonxml::depthcounter);
254: $depth -- if ($after);
255: my $inset = "\t"x$depth;
256: $result.="\n$inset<$newtag>\n$inset</$newtag>";
257: } else {
258: if (defined(&$func)) {
259: {
260: no strict 'refs';
261: $result.=&$func();
262: }
263: } else {
264: &Apache::lonxml::error("Unable to insert tag $newtag, $func was not defined. ($tagnum)");
265: }
266: }
267: return $result;
268: }
269:
270: sub insert_img {
271: return '
272: <img />';
273: }
274:
275: sub insert_responseparam {
276: return '
277: <responseparam />';
278: }
279:
280: sub insert_parameter {
281: return '
282: <parameter />';
283: }
284:
285: sub insert_formularesponse {
286: return '
287: <formularesponse answer="" samples="">
288: <responseparam description="Numerical Tolerance" type="tolerance" default="0.00001" name="tol" />
289: <textline size="25"/>
290: <hintgroup>
291: <startouttext /><endouttext />
292: </hintgroup>
293: </formularesponse>';
294: }
295:
296: sub insert_numericalresponse {
297: return '
298: <numericalresponse answer="">
299: <responseparam type="tolerance" default="5%" name="tol" description="Numerical Tolerance" />
300: <responseparam name="sig" type="int_range,0-16" default="0,15" description="Significant Figures" />
301: <textline />
302: <hintgroup>
303: <startouttext /><endouttext />
304: </hintgroup>
305: </numericalresponse>';
306: }
307:
308: sub insert_customresponse {
309: return '
310: <customresponse>
311: <answer type="loncapa/perl">
312: </answer>
313: <textline />
314: <hintgroup>
315: <startouttext /><endouttext />
316: </hintgroup>
317: </customresponse>';
318: }
319:
320: sub insert_customresponse_answer {
321: return '
322: <answer type="loncapa/perl">
323: </answer>
324: ';
325: }
326:
327: sub insert_stringresponse {
328: return '
329: <stringresponse answer="" type="">
330: <textline />
331: <hintgroup>
332: <startouttext /><endouttext />
333: </hintgroup>
334: </stringresponse>';
335: }
336:
337: sub insert_essayresponse {
338: return '
339: <essayresponse>
340: <textfield></textfield>
341: </essayresponse>';
342: }
343:
344: sub insert_imageresponse {
345: return '
346: <imageresponse max="1">
347: <foilgroup>
348: <foil>
349: </foil>
350: </foilgroup>
351: <hintgroup>
352: <startouttext /><endouttext />
353: </hintgroup>
354: </imageresponse>';
355: }
356:
357: sub insert_optionresponse {
358: return '
359: <optionresponse max="10">
360: <foilgroup options="">
361: <foil>
362: <startouttext /><endouttext />
363: </foil>
364: </foilgroup>
365: <hintgroup>
366: <startouttext /><endouttext />
367: </hintgroup>
368: </optionresponse>';
369: }
370:
371: sub insert_organicresponse {
372: return '
373: <organicresponse>
374: <textline />
375: <hintgroup>
376: <startouttext /><endouttext />
377: </hintgroup>
378: </organicresponse>';
379: }
380:
381: sub insert_organicstructure {
382: return '
383: <organicstructure />
384: ';
385: }
386:
387: sub insert_radiobuttonresponse {
388: return '
389: <radiobuttonresponse max="10">
390: <foilgroup>
391: <foil>
392: <startouttext /><endouttext />
393: </foil>
394: </foilgroup>
395: <hintgroup>
396: <startouttext /><endouttext />
397: </hintgroup>
398: </radiobuttonresponse>';
399: }
400:
401: sub insert_reactionresponse {
402: return '
403: <reactionresponse>
404: <textline />
405: <hintgroup>
406: <startouttext /><endouttext />
407: </hintgroup>
408: </reactionresponse>';
409: }
410:
411: sub insert_rankresponse {
412: return '
413: <rankresponse max="10">
414: <foilgroup options="">
415: <foil>
416: <startouttext /><endouttext />
417: </foil>
418: </foilgroup>
419: <hintgroup>
420: <startouttext /><endouttext />
421: </hintgroup>
422: </rankresponse>';
423: }
424:
425: sub insert_matchresponse {
426: return '
427: <matchresponse max="10">
428: <foilgroup options="">
429: <itemgroup>
430: </itemgroup>
431: <foil>
432: <startouttext /><endouttext />
433: </foil>
434: </foilgroup>
435: <hintgroup>
436: <startouttext /><endouttext />
437: </hintgroup>
438: </matchresponse>';
439: }
440:
441: sub insert_displayduedate { return '<displayduedate />'; }
442: sub insert_displaytitle { return '<displaytitle />'; }
443: sub insert_hintpart {
444: return '
445: <hintpart on="default">
446: <startouttext/><endouttext />
447: </hintpart>';
448: }
449:
450: sub insert_hintgroup {
451: return '
452: <hintgroup>
453: <startouttext /><endouttext />
454: </hintgroup>';
455: }
456:
457: sub insert_numericalhint {
458: return '
459: <numericalhint>
460: </numericalhint>';
461: }
462:
463: sub insert_stringhint {
464: return '
465: <stringhint>
466: </stringhint>';
467: }
468:
469: sub insert_formulahint {
470: return '
471: <formulahint>
472: </formulahint>';
473: }
474:
475: sub insert_radiobuttonhint {
476: return '
477: <radiobuttonhint>
478: </radiobuttonhint>';
479: }
480:
481: sub insert_optionhint {
482: return '
483: <optionhint>
484: </optionhint>';
485: }
486:
487: sub insert_startouttext {
488: return "<startouttext /><endouttext />";
489: }
490:
491: sub insert_script {
492: return "\n<script type=\"loncapa/perl\"></script>";
493: }
494:
495: sub js_change_detection {
496: my $unsaved=&mt("There are unsaved changes");
497: return (<<SCRIPT);
498: <script type="text/javascript">
499: var clean = true;
500: var is_submit = false;
501: var still_ask = false;
502: function compareForm(event_) {
503: if (!event_ && window.event) {
504: event_ = window.event;
505: }
506: if ((!is_submit || (is_submit && still_ask)) && !clean) {
507: still_ask = false;
508: is_submit = false;
509: event_.returnValue = "$unsaved";
510: return "$unsaved";
511: }
512: }
513: function unClean() {
514: clean=false;
515: }
516: window.onbeforeunload = compareForm;
517: </script>
518: SCRIPT
519: }
520:
521: sub form_change_detection {
522: return ' onsubmit="is_submit=true;" ';
523: }
524:
525: sub element_change_detection {
526: return ' onchange="unClean();" ';
527: }
528:
529: sub submit_ask_anyway {
530: return ' onclick="still_ask=true;" ';
531: }
532:
533: sub textarea_sizes {
534: my ($data)=@_;
535: my $count=0;
536: my $maxlength=-1;
537: foreach (split ("\n", $$data)) {
538: $count+=int(length($_)/79);
539: $count++;
540: if (length($_) > $maxlength) { $maxlength = length($_); }
541: }
542: my $rows = $count;
543: my $cols = $maxlength;
544: return ($rows,$cols);
545: }
546:
547: sub editline {
548: my ($tag,$data,$description,$size)=@_;
549: $data=&HTML::Entities::encode($data,'<>&"');
550: if ($description) { $description="<br />".$description."<br />"; }
551: my $change_code = &element_change_detection();
552: my $result = <<"END";
553: $description
554: <input type="text" name="homework_edit_$Apache::lonxml::curdepth"
555: value="$data" size="$size" $change_code />
556: END
557: return $result;
558: }
559:
560: sub editfield {
561: my ($tag,$data,$description,$minwidth,$minheight,$usehtmlarea)=@_;
562:
563: my ($rows,$cols)=&textarea_sizes(\$data);
564: if (&Apache::lonhtmlcommon::htmlareabrowser() &&
565: !&Apache::lonhtmlcommon::htmlareablocked()) {
566: $rows+=7; # make room for HTMLarea
567: $minheight+=7; # make room for HTMLarea
568: }
569: if ($cols > 80) { $cols = 80; }
570: if ($cols < $minwidth ) { $cols = $minwidth; }
571: if ($rows < $minheight) { $rows = $minheight; }
572: if ($description) { $description="<br />".$description."<br />"; }
573: if ($usehtmlarea) {
574: &Apache::lonhtmlcommon::add_htmlareafields('homework_edit_'.
575: $Apache::lonxml::curdepth);
576: }
577: # remove typesetting whitespace from between data and the end tag
578: # to make the edit look prettier
579: $data =~ s/\n?[ \t]*$//;
580:
581: return $description."\n".'<textarea style="width:100%" rows="'.$rows.
582: '" cols="'.$cols.'" name="homework_edit_'.
583: $Apache::lonxml::curdepth.'" id="homework_edit_'.
584: $Apache::lonxml::curdepth.'" '.&element_change_detection().'>'.
585: &HTML::Entities::encode($data,'<>&"').'</textarea>'.
586: ($usehtmlarea?&Apache::lonhtmlcommon::spelllink('lonhomework',
587: 'homework_edit_'.$Apache::lonxml::curdepth):'')."\n";
588: }
589:
590: sub modifiedfield {
591: my ($endtag,$parser) = @_;
592: my $result;
593: $result=$env{"form.homework_edit_$Apache::lonxml::curdepth"};
594: my $bodytext=&Apache::lonxml::get_all_text($endtag,$parser);
595: # textareas throw away intial \n
596: if ($bodytext=~/^\n/) {
597: $result="\n".$result;
598: }
599: # if there is typesetting whitespace from between the data and the end tag
600: # restore to keep the source looking pretty
601: if ($bodytext =~ /(\n?[ \t]*)$/) {
602: $result .= $1;
603: }
604: return $result;
605: }
606:
607: # Returns a 1 if the token has been modified and you should rebuild the tag
608: # side-effects, will modify the $token if new values are found
609: sub get_new_args {
610: my ($token,$parstack,$safeeval,@args)=@_;
611: my $rebuild=0;
612: foreach my $arg (@args) {
613: #just want the string that it was set to
614: my $value=$token->[2]->{$arg};
615: my $element=&html_element_name($arg);
616: my $newvalue=$env{"form.$element"};
617: &Apache::lonxml::debug("for:$arg: cur is :$value: new is :$newvalue:");
618: if (defined($newvalue) && $value ne $newvalue) {
619: if (ref($newvalue) eq 'ARRAY') {
620: $token->[2]->{$arg}=join(',',@$newvalue);
621: } else {
622: $token->[2]->{$arg}=$newvalue;
623: }
624: $rebuild=1;
625: } elsif (!defined($newvalue) && defined($value)) {
626: delete($token->[2]->{$arg});
627: $rebuild=1;
628: }
629: }
630: return $rebuild;
631: }
632:
633: # looks for /> on start tags
634: sub rebuild_tag {
635: my ($token) = @_;
636: my $result;
637: if ($token->[0] eq 'S') {
638: $result = '<'.$token->[1];
639: while (my ($key,$val)= each(%{$token->[2]})) {
640: $val=~s:^\s+|\s+$::g;
641: $val=~s:"::g; #"
642: &Apache::lonxml::debug("setting :$key: to :$val:");
643: $result.=' '.$key.'="'.$val.'"';
644: }
645: if ($token->[4] =~ m:/>$:) {
646: $result.=' />';
647: } else {
648: $result.='>';
649: }
650: } elsif ( $token->[0] eq 'E' ) {
651: $result = '</'.$token->[1].'>';
652: }
653: return $result;
654: }
655:
656: sub html_element_name {
657: my ($name) = @_;
658: return $name.'_'.$Apache::lonxml::curdepth;
659: }
660:
661: sub hidden_arg {
662: my ($name,$token) = @_;
663: my $result;
664: my $arg=$token->[2]{$name};
665: $result='<input name="'.&html_element_name($name).
666: '" type="hidden" value="'.$arg.'" />';
667: return $result;
668: }
669:
670: sub checked_arg {
671: my ($description,$name,$list,$token) = @_;
672: my $result;
673: my $optionlist="";
674: my $allselected=$token->[2]{$name};
675: $result=&mt($description);
676: foreach my $option (@$list) {
677: my ($value,$text);
678: if ( ref($option) eq 'ARRAY') {
679: $value='value="'.$$option[0].'"';
680: $text=$$option[1];
681: $option=$$option[0];
682: } else {
683: $text=$option;
684: $value='value="'.$option.'"';
685: }
686: $result.="<nobr><label><input type='checkbox' $value name='".
687: &html_element_name($name)."'";
688: foreach my $selected (split(/,/,$allselected)) {
689: if ( $selected eq $option ) {
690: $result.=" checked='checked' ";
691: last;
692: }
693: }
694: $result.=&element_change_detection()." />$text</label></nobr>\n";
695: }
696: return $result;
697: }
698:
699: sub text_arg {
700: my ($description,$name,$token,$size) = @_;
701: my $result;
702: if (!defined $size) { $size=20; }
703: my $arg=$token->[2]{$name};
704: $result=&mt($description).' <input name="'.&html_element_name($name).
705: '" type="text" value="'.$arg.'" size="'.$size.'" '.
706: &element_change_detection().'/>';
707: return '<nobr>'.$result.'</nobr>';
708: }
709:
710: sub select_arg {
711: my ($description,$name,$list,$token) = @_;
712: my $result;
713: my $optionlist="";
714: my $selected=$token->[2]{$name};
715: foreach my $option (@$list) {
716: my ($text,$value);
717: if ( ref($option) eq 'ARRAY') {
718: $value='value="'.&HTML::Entities::encode($$option[0]).'"';
719: $text=$$option[1];
720: $option=$$option[0];
721: } else {
722: $text=$option;
723: $value='value="'.&HTML::Entities::encode($option,'\'"&<>').'"';
724: }
725: if ( $selected eq $option ) {
726: $optionlist.="<option $value selected=\"selected\">$text</option>\n";
727: } else {
728: $optionlist.="<option $value >$text</option>\n";
729: }
730: }
731: $result.='<nobr>'.$description.' <select name="'.
732: &html_element_name($name).'" '.&element_change_detection().' >
733: '.$optionlist.'
734: </select></nobr>';
735: return $result;
736: }
737:
738: sub select_or_text_arg {
739: my ($description,$name,$list,$token,$size) = @_;
740: my $result;
741: my $optionlist="";
742: my $found=0;
743: my $selected=$token->[2]{$name};
744: foreach my $option (@$list) {
745: my ($text,$value);
746: if ( ref($option) eq 'ARRAY') {
747: $value='value="'.&HTML::Entities::encode($$option[0]).'"';
748: $text=$$option[1];
749: $option=$$option[0];
750: } else {
751: $text=$option;
752: $value='value="'.&HTML::Entities::encode($option,'\'"&<>').'"';
753: }
754: if ( $selected eq $option ) {
755: $optionlist.="<option $value selected=\"selected\">$text</option>\n";
756: $found=1;
757: } else {
758: $optionlist.="<option $value>$text</option>\n";
759: }
760: }
761: $optionlist.="<option value=\"TYPEDINVALUE\"".
762: ((!$found)?' selected="selected"':'').
763: ">".&mt('Type-in value')."</option>\n";
764: #
765: my $change_code=&element_change_detection();
766: my $element=&html_element_name($name);
767: my $selectelement='select_list_'.$element;
768: my $typeinelement='type_in_'.$element;
769: my $typeinvalue=($found?'':$selected);
770: #
771: my $hiddenvalue='this.form.'.$element.'.value';
772: my $selectedindex='this.form.'.$selectelement.'.selectedIndex';
773: my $selectedvalue='this.form.'.$selectelement.
774: '.options['.$selectedindex.'].value';
775: my $typedinvalue='this.form.'.$typeinelement.'.value';
776: my $selecttypeinindex='this.form.'.$selectelement.'.options.length';
777: $description=&mt($description);
778: #
779: return (<<ENDSELECTORTYPE);
780: <nobr>
781: $description
782: <select name="$selectelement"
783: onChange="if ($selectedvalue!='TYPEDINVALUE') { $hiddenvalue=$selectedvalue; $typedinvalue=''; }" >
784: $optionlist
785: </select>
786: <input type="text" size="$size" name="$typeinelement"
787: value="$typeinvalue"
788: onChange="$hiddenvalue=$typedinvalue;"
789: onFocus="$selectedindex=$selecttypeinindex-1;" />
790: <input type="hidden" name="$element" value="$selected" $change_code />
791: </nobr>
792: ENDSELECTORTYPE
793: }
794:
795: #----------------------------------------------------- image coordinates
796: # single image coordinates, x, y
797: sub entercoords {
798: my ($idx,$idy,$mode,$width,$height) = @_;
799: unless ($Apache::edit::bgimgsrc) { return ''; }
800: if ($idx) { $idx.='_'; }
801: if ($idy) { $idy.='_'; }
802: my $bgfile=&escape(&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$Apache::edit::bgimgsrc));
803: my $form = 'lonhomework';
804: my $element;
805: if (! defined($mode) || $mode eq 'attribute') {
806: $element = &escape("$Apache::lonxml::curdepth");
807: } elsif ($mode eq 'textnode') { # for data between <tag> ... </tag>
808: $element = &escape('homework_edit_'.
809: $Apache::lonxml::curdepth);
810: }
811: my $id=$Apache::lonxml::curdepth;
812: my %data=("imagechoice.$id.type" =>'point',
813: "imagechoice.$id.formname" =>$form,
814: "imagechoice.$id.formx" =>"$idx$element",
815: "imagechoice.$id.formy" =>"$idy$element",
816: "imagechoice.$id.file" =>$bgfile,
817: "imagechoice.$id.formcoord" =>$element);
818: if ($height) {
819: $data{"imagechoice.$id.formheight"}=$height.'_'.
820: $Apache::edit::bgimgsrccurdepth;
821: }
822: if ($width) {
823: $data{"imagechoice.$id.formwidth"}=$width.'_'.
824: $Apache::edit::bgimgsrccurdepth;
825: }
826: &Apache::lonnet::appenv(%data);
827: my $text="Click Coordinates";
828: my $result='<a href="/adm/imagechoice?token='.$id.'" target="imagechoice">'.$text.'</a>';
829: return $result;
830: }
831:
832: # coordinates (x1,y1)-(x2,y2)...
833: # mode can be either box, or polygon
834: sub entercoord {
835: my ($idx,$mode,$width,$height,$type) = @_;
836: unless ($Apache::edit::bgimgsrc) { return ''; }
837: my $bgfile=&escape(&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$Apache::edit::bgimgsrc));
838: my $form = 'lonhomework';
839: my $element;
840: if (! defined($mode) || $mode eq 'attribute') {
841: $element = &escape("$idx\_$Apache::lonxml::curdepth");
842: } elsif ($mode eq 'textnode') { # for data between <tag> ... </tag>
843: $element = &escape('homework_edit_'.
844: $Apache::lonxml::curdepth);
845: }
846: my $id=$Apache::lonxml::curdepth;
847: my %data=("imagechoice.$id.type" =>$type,
848: "imagechoice.$id.formname" =>$form,
849: "imagechoice.$id.file" =>$bgfile,
850: "imagechoice.$id.formcoord" =>$element);
851: if ($height) {
852: $data{"imagechoice.$id.formheight"}=$height.'_'.
853: $Apache::edit::bgimgsrccurdepth;
854: }
855: if ($width) {
856: $data{"imagechoice.$id.formwidth"}=$width.'_'.
857: $Apache::edit::bgimgsrccurdepth;
858: }
859: &Apache::lonnet::appenv(%data);
860: my $text="Enter Coordinates";
861: if ($type eq 'polygon') { $text='Create Polygon Data'; }
862: my $result='<a href="/adm/imagechoice?token='.$id.'" target="imagechoice">'.$text.'</a>';
863: return $result;
864: }
865:
866: sub deletecoorddata {
867: &Apache::lonnet::delenv("imagechoice\\.");
868: }
869:
870: #----------------------------------------------------- browse
871: sub browse {
872: # insert a link to call up the filesystem browser (lonindexer)
873: my ($id, $mode, $titleid) = @_;
874: my $form = 'lonhomework';
875: my $element;
876: if (! defined($mode) || $mode eq 'attribute') {
877: $element = &escape("$id\_$Apache::lonxml::curdepth");
878: } elsif ($mode eq 'textnode') { # for data between <tag> ... </tag>
879: $element = &escape('homework_edit_'.
880: $Apache::lonxml::curdepth);
881: }
882: my $titleelement;
883: if ($titleid) {
884: $titleelement=",'','','".&escape("$titleid\_$Apache::lonxml::curdepth")."'";
885: }
886: my $result = <<"ENDBUTTON";
887: <a href=\"javascript:openbrowser('$form','$element'$titleelement)\"\>Select</a>
888: ENDBUTTON
889: return $result;
890: }
891:
892: #----------------------------------------------------- browse
893: sub search {
894: # insert a link to call up the filesystem browser (lonindexer)
895: my ($id, $mode, $titleid) = @_;
896: my $form = 'lonhomework';
897: my $element;
898: if (! defined($mode) || $mode eq 'attribute') {
899: $element = &escape("$id\_$Apache::lonxml::curdepth");
900: } elsif ($mode eq 'textnode') { # for data between <tag> ... </tag>
901: $element = &escape('homework_edit_'.
902: $Apache::lonxml::curdepth);
903: }
904: my $titleelement;
905: if ($titleid) {
906: $titleelement=",'".&escape("$titleid\_$Apache::lonxml::curdepth")."'";
907: }
908: my $result = <<"ENDBUTTON";
909: <a href=\"javascript:opensearcher('$form','$element'$titleelement)\"\>Search</a>
910: ENDBUTTON
911: return $result;
912: }
913:
914:
915: 1;
916: __END__
917:
918: =head1 NAME
919:
920: Apache::edit - edit mode helpers
921:
922: =head1 SYNOPSIS
923:
924: Invoked by many homework and xml related modules.
925:
926: &Apache::edit::SUBROUTINENAME(ARGUMENTS);
927:
928: =head1 INTRODUCTION
929:
930: This module outputs HTML syntax helpful for the rendering of edit
931: mode interfaces.
932:
933: This is part of the LearningOnline Network with CAPA project
934: described at http://www.lon-capa.org.
935:
936: =head1 HANDLER SUBROUTINE
937:
938: There is no handler subroutine.
939:
940: =head1 OTHER SUBROUTINES
941:
942: =over 4
943:
944: =item *
945:
946: initialize_edit() : initialize edit (set colordepth to zero)
947:
948: =item *
949:
950: tag_start($target,$token,$description) : provide deletion and insertion lists
951: for the manipulation of a start tag; return a scalar string
952:
953: =item *
954:
955: tag_end($target,$token,$description) : ending syntax corresponding to
956: &tag_start. return a scalar string.
957:
958: =item *
959:
960: start_table($token) : start table; update colordepth; return scalar string.
961:
962: =item *
963:
964: end_table() : reduce color depth; end table; return scalar string
965:
966: =item *
967:
968: start_spanning_row() : start a new table row spanning the 'edit' environment.
969:
970: =item *
971:
972: start_row() : start a new table row and element.
973:
974: =item *
975:
976: end_row() : end current table element and row.
977:
978: =item *
979:
980: movebuttons($target,$token) : move-up and move-down buttons; return scalar
981: string
982:
983: =item *
984:
985: deletelist($target,$token) : provide a yes option in an HTML select element;
986: return scalar string
987:
988: =item *
989:
990: handle_delete($space,$target,$token,$tagstack,$parstack,$parser,$safeeval,
991: $style) : respond to a user delete request by passing relevant stack
992: and array information to various rendering functions; return a scalar string
993:
994: =item *
995:
996: get_insert_list($token) : provide an insertion list based on possibilities
997: from lonxml; return a scalar string
998:
999: =item *
1000:
1001: insertlist($target,$token) : api that uses get_insert_list;
1002: return a scalar string
1003:
1004: =item *
1005:
1006: handleinsert($token) : provide an insertion list based on possibilities
1007: from lonxml; return a scalar string
1008:
1009: =item *
1010:
1011: get_insert_list($token) : provide an insertion list based on possibilities
1012: from lonxml; return a scalar string
1013:
1014: =item *
1015: browse($elementname) : provide a link which will open up the filesystem
1016: browser (lonindexer) and, once a file is selected, place the result in
1017: the form element $elementname.
1018:
1019: =item *
1020: search($elementname) : provide a link which will open up the filesystem
1021: searcher (lonsearchcat) and, once a file is selected, place the result in
1022: the form element $elementname.
1023:
1024: =item *
1025: editline(tag,data,description,size): Provide a <input type="text" ../> for
1026: single-line text entry. This is to be used for text enclosed by tags, not
1027: arguements/parameters associated with a tag.
1028:
1029: =back
1030:
1031: incomplete...
1032:
1033: =cut
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