Annotation of loncom/homework/edit.pm, revision 1.29
1.1 albertel 1: # The LearningOnline Network with CAPA
2: # edit mode helpers
1.25 albertel 3: #
1.29 ! matthew 4: # $Id: edit.pm,v 1.28 2002/01/21 16:40:57 matthew Exp $
1.25 albertel 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: #
1.1 albertel 28: # 3/20 Guy
1.27 matthew 29: # 01/10/02 Matthew
1.29 ! matthew 30: # 03/06/02 Matthew
1.1 albertel 31: package Apache::edit;
32:
33: use strict;
34: use Apache::lonnet;
35:
1.10 albertel 36: # Global Vars
37: # default list of colors to use in editing
38: @Apache::edit::colorlist=('#ffffff','#ff0000','#00ff00','#0000ff','#0ff000','#000ff0','#f0000f');
39: # depth of nesting of edit
40: $Apache::edit::colordepth=0;
41:
42: sub initialize_edit {
43: $Apache::edit::colordepth=0;
44: }
45:
1.1 albertel 46: sub tag_start {
1.9 albertel 47: my ($target,$token,$description) = @_;
1.1 albertel 48: my $result='';
1.5 albertel 49: if ($target eq "edit") {
1.4 albertel 50: my $tag=$token->[1];
1.22 albertel 51: if (!$description) {
52: $description=&Apache::lonxml::description($token);
53: if (!$description) { $description="<$tag>"; }
54: }
1.10 albertel 55: $result.= &start_table($token)."<tr><td>$description</td>
1.14 albertel 56: <td>Delete".
1.8 albertel 57: &deletelist($target,$token)
58: ."</td>
1.4 albertel 59: <td>".
1.27 matthew 60: &insertlist($target,$token).&end_row().&start_spanning_row();
61: #<td>".
1.22 albertel 62: # &movebuttons($target,$token).
63: # "</tr><tr><td colspan=\"3\">\n";
1.4 albertel 64: }
1.1 albertel 65: return $result;
66: }
67:
68: sub tag_end {
1.9 albertel 69: my ($target,$token,$description) = @_;
1.1 albertel 70: my $result='';
1.4 albertel 71: if ($target eq 'edit') {
72: my $tag=$token->[1];
1.9 albertel 73: if (!defined($description)) {
1.14 albertel 74: $result.="</td></tr><tr><td></$tag></td><td colspan=\"2\"> </td>";
1.9 albertel 75: } else {
1.14 albertel 76: if ($description ne '') { $result.="</td></tr><tr><td>$description</td><td colspan=\"2\"> </td>"; }
1.9 albertel 77: }
1.12 albertel 78: $result.="</tr>".&end_table()."\n";
1.4 albertel 79: }
80: return $result;
81: }
1.1 albertel 82:
1.10 albertel 83: sub start_table {
84: my ($token)=@_;
85: my $tag = $token->[1];
86: my $tagnum;
87: foreach my $namespace (reverse @Apache::lonxml::namespace) {
1.23 albertel 88: my $testtag=$namespace.'::'.$tag;
1.10 albertel 89: $tagnum=$Apache::lonxml::insertlist{"$testtag.num"};
90: if (defined($tagnum)) { last; }
91: }
92: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
93: my $color = $Apache::lonxml::insertlist{"$tagnum.color"};
94: if (!defined($color)) {
95: $color = $Apache::edit::colorlist[$Apache::edit::colordepth];
96: }
97: $Apache::edit::colordepth++;
1.12 albertel 98: my $result="<table bgcolor=\"$color\" width=\"100%\" border=\"5\">";
1.10 albertel 99: return $result;
100: }
101:
102: sub end_table {
103: $Apache::edit::colordepth--;
104: my $result="</table>";
105: return $result;
106: }
107:
1.27 matthew 108: sub start_spanning_row { return '<tr><td colspan="3">';}
109: sub start_row { return '<tr><td>'; }
110: sub end_row { return '</td></tr>'; }
111:
1.22 albertel 112: sub movebuttons {
113: my ($target,$token) = @_;
114: my $result='<input type="submit" name="moveup.'.
115: $Apache::lonxml::curdepth.'" value="Move Up" />';
116: $result.='<input type="submit" name="movedown.'.
117: $Apache::lonxml::curdepth.'" value="Move Down" />';
118: return $result;
119: }
120:
1.8 albertel 121: sub deletelist {
122: my ($target,$token) = @_;
123: my $result = "<select name=\"delete_$Apache::lonxml::curdepth\">
1.14 albertel 124: <option></option>
125: <option>Yes</option>
1.8 albertel 126: </select>";
127: return $result;
128: }
129:
1.14 albertel 130: sub handle_delete {
131: if (!$ENV{"form.delete_$Apache::lonxml::curdepth"}) { return ''; }
132: my ($space,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
133: my $result=0;
134: if ($space) {
135: my $sub1="$space\:\:delete_$token->[1]";
136: {
137: no strict 'refs';
138: if (defined &$sub1) {
139: $result=&$sub1($target,$token,$tagstack,$parstack,$parser,$safeeval,$style);
140: }
141: }
142: }
143: if (!$result) {
144: my $endtag='/'.$token->[1];
145: my $bodytext=&Apache::lonxml::get_all_text($endtag,$$parser[$#$parser]);
146: $$parser['-1']->get_token();
147: &Apache::lonxml::debug("Deleting :$bodytext: for $token->[1]");
148: &Apache::lonxml::end_tag($tagstack,$parstack,$token);
149: }
150: return 1;
151: }
152:
1.7 albertel 153: sub get_insert_list {
1.6 albertel 154: my ($token) = @_;
155: my $result='';
1.7 albertel 156: my @tagnums= ();
157: #&Apache::lonxml::debug("keys ".join("\n",sort(keys(%Apache::lonxml::insertlist))));
1.6 albertel 158: if ($Apache::lonxml::insertlist{"$token->[1].which"}) {
1.7 albertel 159: push (@tagnums, @{ $Apache::lonxml::insertlist{"$token->[1].which"} });
160: }
161: foreach my $namespace (@Apache::lonxml::namespace) {
162: if ($Apache::lonxml::insertlist{"$namespace".'::'."$token->[1].which"}) {
163: push (@tagnums, @{ $Apache::lonxml::insertlist{"$namespace".'::'."$token->[1].which"} });
1.6 albertel 164: }
165: }
1.7 albertel 166: if (@tagnums) {
167: foreach my $tagnum (@tagnums) {
168: $result.='<option value="'.$tagnum.'">'.$Apache::lonxml::insertlist{"$tagnum.description"}."</option>\n";
1.5 albertel 169: }
170: if ($result) { $result='<option selected="on"></option>'.$result; }
171: }
172: return $result;
173: }
174:
1.4 albertel 175: sub insertlist {
1.8 albertel 176: my ($target,$token) = @_;
1.4 albertel 177: my $result;
178: if ($target eq 'edit') {
1.5 albertel 179: my $optionlist= &get_insert_list($token);
180: if ($optionlist) {
181: $result = "Insert:
1.4 albertel 182: <select name=\"insert_$Apache::lonxml::curdepth\">
1.5 albertel 183: $optionlist
1.4 albertel 184: </select>"
1.11 albertel 185: } else {
186: $result=" ";
1.6 albertel 187: }
188: }
189: return $result;
190: }
191:
1.7 albertel 192: sub handle_insert {
1.15 albertel 193: if ($ENV{"form.insert_$Apache::lonxml::curdepth"} eq '') { return ''; }
1.6 albertel 194: my $result;
195: my $tagnum = $ENV{"form.insert_$Apache::lonxml::curdepth"};
196: my $func=$Apache::lonxml::insertlist{"$tagnum.function"};
197: if ($func eq 'default') {
198: my $newtag=$Apache::lonxml::insertlist{"$tagnum.tag"};
1.7 albertel 199: my $namespace;
200: if ($newtag =~ /::/) { ($namespace,$newtag) = split(/::/,$newtag); }
1.6 albertel 201: $result.="\n<$newtag>\n</$newtag>";
202: } else {
1.15 albertel 203: if (defined(&$func)) {
204: {
205: no strict 'refs';
206: $result.=&$func();
207: }
208: } else {
209: my $newtag=$Apache::lonxml::insertlist{"$tagnum.tag"};
210: &Apache::lonxml::error("Unable to insert tag $newtag, $func was not defined.");
1.5 albertel 211: }
212: }
213: return $result;
1.16 albertel 214: }
215:
216: sub insert_responseparam {
217: return '
218: <responseparam />';
1.5 albertel 219: }
220:
1.24 albertel 221: sub insert_formularesponse {
222: return '
223: <formularesponse answer="" samples="">
224: <textline />
225: <hintgroup>
226: </hintgroup>
227: </formularesponse>';
228: }
229:
1.15 albertel 230: sub insert_numericalresponse {
231: return '
232: <numericalresponse answer="">
233: <textline />
234: <hintgroup>
235: </hintgroup>
236: </numericalresponse>';
237: }
238:
1.18 albertel 239: sub insert_stringresponse {
240: return '
241: <stringresponse answer="" type="">
242: <textline />
243: <hintgroup>
244: </hintgroup>
245: </stringresponse>';
246: }
247:
1.7 albertel 248: sub insert_optionresponse {
249: return '
250: <optionresponse max="10">
251: <foilgroup options="">
252: </foilgroup>
1.14 albertel 253: <hintgroup>
254: </hintgroup>
1.7 albertel 255: </optionresponse>';
1.1 albertel 256: }
257:
1.23 albertel 258: sub insert_radiobuttonresponse {
259: return '
260: <radiobuttonresponse max="10">
261: <foilgroup>
262: </foilgroup>
263: <hintgroup>
264: </hintgroup>
265: </radiobuttonresponse>';
266: }
267:
1.21 albertel 268: sub insert_displayduedate { return '<displayduedate />'; }
269: sub insert_displaytitle { return '<displaytitle />'; }
1.22 albertel 270: sub insert_hintpart {
271: return '
272: <hintpart on="default">
273: <startouttext/>
274: <endouttext />
275: </hintpart>';
276: }
277:
278: sub insert_numericalhint {
279: return '
280: <numericalhint>
281: </numericalhint>';
282: }
1.21 albertel 283:
1.23 albertel 284: sub insert_startouttext {
285: return "<startouttext />\n<endouttext />";
286: }
287:
288: sub insert_script {
289: return "\n<script type=\"loncapa/perl\">\n</script>";
290: }
291:
1.25 albertel 292: sub textarea_sizes {
293: my ($data)=@_;
294: my $count=0;
295: my $maxlength=-1;
1.26 harris41 296: foreach (split ("\n", $$data)) { $count++;
1.25 albertel 297: if (length($_) > $maxlength) { $maxlength = length($_); }
1.26 harris41 298: }
1.25 albertel 299: my $rows = $count;
300: my $cols = $maxlength;
301: return ($rows,$cols);
302: }
303:
1.2 albertel 304: sub editfield {
1.5 albertel 305: my ($tag,$data,$description,$minwidth,$minheight)=@_;
1.22 albertel 306:
1.25 albertel 307: my ($rows,$cols)=&textarea_sizes(\$data);
308: if ($cols > 80) { $cols = 80; }
309: if ($cols < $minwidth ) { $cols = $minwidth; }
310: if ($rows < $minheight) { $rows = $minheight; }
311: if ($description) { $description="<br />".$description."<br />"; }
312: return "$description\n <textarea rows=\"$rows\" cols=\"$cols\" name=\"homework_edit_".$Apache::lonxml::curdepth."\">$data</textarea>\n";
1.2 albertel 313: }
314:
315: sub modifiedfield {
316: my ($token) = @_;
1.3 albertel 317: my $result;
318: # foreach my $envkey (sort keys %ENV) {
319: # &Apache::lonxml::debug("$envkey ---- $ENV{$envkey}");
320: # }
321: # &Apache::lonxml::debug("I want homework_edit_$Apache::lonxml::curdepth");
322: # &Apache::lonxml::debug($ENV{"form.homework_edit_$Apache::lonxml::curdepth"});
323: $result=$ENV{"form.homework_edit_$Apache::lonxml::curdepth"};
324: return $result;
1.2 albertel 325: }
326:
1.15 albertel 327: # Returns a 1 if the token has been modified and you should rebuild the tag
1.12 albertel 328: # side-effects, will modify the $token if new values are found
329: sub get_new_args {
330: my ($token,$parstack,$safeeval,@args)=@_;
331: my $rebuild=0;
332: foreach my $arg (@args) {
1.20 albertel 333: #just want the string that it was set to
334: my $value=$token->[2]->{$arg};
1.12 albertel 335: my $newvalue=$ENV{"form.$Apache::lonxml::curdepth.$arg"};
336: &Apache::lonxml::debug(" for:$arg: cur is :$value: new is :$newvalue:");
337: if ($value ne $newvalue) {
338: $token->[2]->{$arg}=$newvalue;
339: $rebuild=1;
340: }
341: }
342: return $rebuild;
343: }
344:
1.15 albertel 345: # looks for /> on start tags
1.12 albertel 346: sub rebuild_tag {
347: my ($token) = @_;
348: my $result;
349: if ($token->[0] eq 'S') {
350: $result = '<'.$token->[1];
351: while (my ($key,$val)= each(%{$token->[2]})) {
1.20 albertel 352: $val=~s:^\s+|\s+$::g;
1.17 albertel 353: $val=~s:"::g; #"
1.12 albertel 354: &Apache::lonxml::debug("setting :$key: to :$val:");
355: $result.=' '.$key.'="'.$val.'"';
356: }
1.15 albertel 357: if ($token->[4] =~ m:/>$:) {
358: $result.=' />';
359: } else {
360: $result.='>';
361: }
1.12 albertel 362: } elsif ( $token->[0] eq 'E' ) {
363: $result = '</'.$token->[1].'>';
364: }
365: return $result;
366: }
1.13 albertel 367:
368: sub text_arg {
369: my ($description,$name,$token,$size) = @_;
370: my $result;
371: if (!defined $size) { $size=20; }
372: my $arg=$token->[2]{$name};
373: $result=$description.'<input name="'."$Apache::lonxml::curdepth.$name".
374: '" type="text" value="'.$arg.'" size="'.$size.'" />';
375: return $result;
376: }
377:
378: sub select_arg {
379: my ($description,$name,$list,$token) = @_;
380: my $result;
381: my $optionlist="";
382: my $selected=$token->[2]{$name};
383: foreach my $option (@$list) {
384: if ( $selected eq $option ) {
385: $optionlist.="<option selected=\"on\">$option</option>\n";
386: } else {
387: $optionlist.="<option>$option</option>\n";
388: }
389: }
390: $result.=$description.'<select name="'."$Apache::lonxml::curdepth.$name".'">
391: '.$optionlist.'
1.27 matthew 392: </select>';
1.13 albertel 393: return $result;
394: }
395:
1.19 albertel 396: sub select_or_text_arg {
397: my ($description,$name,$list,$token,$size) = @_;
398: my $result;
399: my $optionlist="";
400: my $found=0;
401: my $selected=$token->[2]{$name};
402: foreach my $option (@$list) {
403: if ( $selected eq $option ) {
404: $optionlist.="<option selected=\"on\">$option</option>\n";
405: $found=1;
406: } else {
407: $optionlist.="<option>$option</option>\n";
408: }
409: }
410: $optionlist.="<option value=\"TYPEDINVALUE\">Type in value</option>\n";
411: if ($found) {
412: $result.=$description.'<select name="'."$Apache::lonxml::curdepth.$name".'">
413: '.$optionlist.'
1.27 matthew 414: </select>';
1.19 albertel 415: } else {
416: $result.=&text_arg($description,$name,$token,$size);
417: }
418: return $result;
419: }
1.29 ! matthew 420:
! 421: #----------------------------------------------------- browse
! 422: sub browse {
! 423: # insert a link to call up the filesystem browser (lonindexer)
! 424: my $form = 'lonhomework';
! 425: my $element = &Apache::lonnet::escape("$Apache::lonxml::curdepth.bgimg");
! 426: my $result = <<"ENDBUTTON";
! 427: <a href=\"javascript:openbrowser('$form','$element')\"\>Browse</a>
! 428: ENDBUTTON
! 429: return $result;
! 430: }
! 431:
1.1 albertel 432: 1;
433: __END__
1.26 harris41 434:
435: =head1 NAME
436:
437: Apache::edit - edit mode helpers
438:
439: =head1 SYNOPSIS
440:
441: Invoked by many homework and xml related modules.
442:
443: &Apache::edit::SUBROUTINENAME(ARGUMENTS);
444:
445: =head1 INTRODUCTION
446:
447: This module outputs HTML syntax helpful for the rendering of edit
448: mode interfaces.
449:
450: This is part of the LearningOnline Network with CAPA project
451: described at http://www.lon-capa.org.
452:
453: =head1 HANDLER SUBROUTINE
454:
455: There is no handler subroutine.
456:
457: =head1 OTHER SUBROUTINES
458:
459: =over 4
460:
461: =item *
462:
463: initialize_edit() : initialize edit (set colordepth to zero)
464:
465: =item *
466:
467: tag_start($target,$token,$description) : provide deletion and insertion lists
468: for the manipulation of a start tag; return a scalar string
469:
470: =item *
471:
472: tag_end($target,$token,$description) : ending syntax corresponding to
473: &tag_start. return a scalar string.
474:
475: =item *
476:
477: start_table($token) : start table; update colordepth; return scalar string.
478:
479: =item *
480:
481: end_table() : reduce color depth; end table; return scalar string
1.27 matthew 482:
483: =item *
484:
485: start_spanning_row() : start a new table row spanning the 'edit' environment.
486:
487: =item *
488:
489: start_row() : start a new table row and element.
490:
491: =item *
492:
493: end_row() : end current table element and row.
1.26 harris41 494:
495: =item *
496:
497: movebuttons($target,$token) : move-up and move-down buttons; return scalar
498: string
499:
500: =item *
501:
502: deletelist($target,$token) : provide a yes option in an HTML select element;
503: return scalar string
504:
505: =item *
506:
507: handle_delete($space,$target,$token,$tagstack,$parstack,$parser,$safeeval,
508: $style) : respond to a user delete request by passing relevant stack
509: and array information to various rendering functions; return a scalar string
510:
511: =item *
512:
513: get_insert_list($token) : provide an insertion list based on possibilities
514: from lonxml; return a scalar string
515:
516: =item *
517:
518: insertlist($target,$token) : api that uses get_insert_list;
519: return a scalar string
520:
521: =item *
522:
523: handleinsert($token) : provide an insertion list based on possibilities
524: from lonxml; return a scalar string
525:
526: =item *
527:
528: get_insert_list($token) : provide an insertion list based on possibilities
529: from lonxml; return a scalar string
1.29 ! matthew 530:
! 531: =item *
! 532: browse($elementname) : provide a link which will open up the filesystem
! 533: browser (lonindexer) and, once a file is selected, place the result in
! 534: the form element $elementname.
1.26 harris41 535:
536: =back
537:
538: incomplete...
539:
540: =cut
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