1: # The LearningOnline Network with CAPA
2: # random labelling tool
3: #
4: # $Id: randomlabel.pm,v 1.81 2005/12/01 18:46:31 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: # SYNTAX:
29: # <randomlabel bgimg="URL" width="12" height="45" texwidth="50">
30: # <labelgroup name="GroupOne" type="image">
31: # <location x="123" y="456" />
32: # <location x="321" y="654" />
33: # <location x="213" y="546" />
34: # <label description="TEXT-1">IMG-URL</label>
35: # <label description="TEXT-2">IMG-URL</label>
36: # <label description="TEXT-3">IMG-URL</label>
37: # </labelgroup>
38: # <labelgroup name="GroupTwo" type="text">
39: # <location x="12" y="45" />
40: # <location x="32" y="65" />
41: # <location x="21" y="54" />
42: # <label>TEXT-1</label>
43: # <label>TEXT-2</label>
44: # <label>TEXT-3</label>
45: # </labelgroup>
46: # </randomlabel>
47: # ===========================================
48: # side effect:
49: # location (123,456): $GroupOne[0] = 2 # images give out indexes
50: # (321,654): $GroupOne[1] = 1
51: # (213,546): $GroupOne[2] = 0
52: # location (12,45) : $GroupTwo[0] = "TEXT-3"
53: # (32,65) : $GroupTwo[1] = "TEXT-1"
54: # (21,54) : $GroupTwo[2] = "TEXT-2"
55: # ===========================================
56: package Apache::randomlabel;
57: use Apache::lonnet;
58: use strict;
59: use Apache::edit;
60: use Apache::File();
61: use Apache::Constants qw(:common :http);
62: use Image::Magick;
63: use Apache::lonplot;
64:
65: my %args;
66: my $cgi_id;
67: my $scale_factor; # image scale factor.
68: my $label_xscale; # Label scale factor (needed for gnuplot).
69: my $label_yscale;
70:
71:
72: BEGIN {
73: &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label','bgimg'));
74: }
75:
76:
77:
78: sub check_int {
79: # utility function to do error checking on a integer.
80: my ($num,$default) = @_;
81: $default = 100 if (! defined($default));
82: $num =~ s/\s+//g; # We dont need no stinkin white space!
83: # If it is a real, just grab the integer part.
84: ($num,undef) = split (/\./,$num) if ($num =~ /\./);
85: # set to default if what we have left doesn't match anything...
86: $num = $default unless ($num =~/^\d+$/);
87: return $num;
88: }
89:
90: # Get width/height from an image tag...
91: #
92: # Parameters:
93: # tag - tag potentially containing height/width attributes.
94: # def_width - Default width.
95: # def_height - Default height.
96: # Returns:
97: # list containing width/height.
98: #
99: sub extract_tag_sizes {
100: my ($tag, $dw, $dh) = @_;
101: $tag =~ s/\s+/ /g; # Collapse whitespace.
102: $tag =~ s/\s*=\s*/=/g; # kill space around ='s.
103: $tag =~ s/[<>\"]//g; # Get rid of the <">'s too.
104:
105: &Apache::lonxml::debug("Compressed tag: $tag");
106: my @taglist = split(/ /,$tag);
107: foreach my $attribute (@taglist) {
108: if ($attribute =~ /^width/i) {
109: my ($e, $s)= split(/=/,$attribute);
110: $dw = $s;
111: }
112: if ($attribute =~ /^height/i) {
113: my ($e, $s) = split(/=/,$attribute);
114: $dh = $s;
115: }
116: }
117: return($dw, $dh);
118:
119: }
120:
121: my ($height_param,$width_param);
122: sub start_randomlabel {
123:
124: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
125: my $result='';
126: push (@Apache::lonxml::namespace,'randomlabel');
127: ($height_param,$width_param)=(0,0);
128: $label_xscale = 1.0; # Assume image size not overridden.
129: $label_yscale = 1.0;
130: my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
131: if ( defined($bgimg) && $bgimg !~ /^http:/ ) {
132: $bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);
133: if (&Apache::lonnet::repcopy($bgimg) ne 'ok') {
134: $bgimg='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
135: }
136: }
137: $Apache::randomlabel::obj_cnt=0;
138: if ($target eq 'web') {
139: $cgi_id=&Apache::loncommon::get_cgi_id();
140: %args=();
141: $args{"cgi.$cgi_id.BGIMG"}=&Apache::lonnet::escape($bgimg);
142: $height_param = &Apache::lonxml::get_param('height',$parstack, $safeeval);
143: $width_param = &Apache::lonxml::get_param('width', $parstack, $safeeval);
144: } elsif ($target eq 'tex' && defined($bgimg)) {
145: $result.=&make_eps_image($bgimg,$parstack,$safeeval);
146: } elsif ($target eq 'edit') {
147: $result.=&Apache::edit::tag_start($target,$token);
148: $Apache::edit::bgimgsrc=
149: &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
150: $Apache::edit::bgimgsrccurdepth=$Apache::lonxml::curdepth;
151: $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).' ';
152: $result.=&Apache::edit::browse('bgimg').' ';
153: $result.=&Apache::edit::search('bgimg').'<br />'.
154: &Apache::edit::text_arg('Width(pixel):' ,'width' ,$token,6).
155: &Apache::edit::text_arg('Height(pixel):','height' ,$token,6).
156: &Apache::edit::text_arg('TeXWidth(mm):' ,'texwidth',$token,6).
157: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
158: } elsif ($target eq 'modified') {
159: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
160: $safeeval,'bgimg','width',
161: 'height','texwidth');
162: if ($constructtag) {
163: $result = &Apache::edit::rebuild_tag($token);
164: $result.=&Apache::edit::handle_insert();
165: }
166: }
167: return $result;
168: }
169:
170: sub end_randomlabel {
171: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
172: my $result='';
173: my $count;
174: pop @Apache::lonxml::namespace;
175: if ($target eq 'web') {
176: $count = $Apache::randomlabel::obj_cnt;
177: if( $count != 0) { $args{"cgi.$cgi_id.OBJCOUNT"}=$count; }
178: $result.='<img src="/adm/randomlabel.png?token='.$cgi_id.'" /><br />'."\n";
179: &Apache::lonnet::appenv(%args);
180: } elsif ($target eq 'tex') {
181: $result='\end{picture}\\\\';
182: $result.= ' \vskip -'.$height_param.' mm } \\\\ ';
183: } elsif ($target eq 'edit') {
184: $result.=&Apache::edit::end_table;
185: }
186: return $result;
187: }
188:
189:
190: sub start_bgimg {
191: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
192: my $result='';
193: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
194: &Apache::lonxml::startredirection();
195: }
196: return $result;
197: }
198:
199: sub end_bgimg {
200: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
201: my $result='';
202: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
203: my $bgimg=&Apache::lonxml::endredirection();
204: if ($target eq 'web') {
205:
206: # If the tag produced has sizes, they override ours.
207: # (for now anyway).
208: #
209: &Apache::lonxml::debug("Base sizes: $width_param x $height_param");
210:
211: my ($plot_x, $plot_y) = &extract_tag_sizes($bgimg,
212: $width_param,
213: $height_param);
214: &Apache::lonxml::debug("Extracted sizes: $plot_x x $plot_y");
215: if ($width_param) {
216: $label_xscale = $plot_x / $width_param;
217: }
218: if ($height_param) {
219: $label_yscale = $plot_y / $height_param;
220: }
221: &Apache::lonxml::debug("Scale factors: $label_xscale $label_yscale");
222:
223: &Apache::lonxml::debug("Image: $bgimg");
224: $bgimg=&Apache::imageresponse::clean_up_image($bgimg);
225: &Apache::lonxml::debug("Cleaned image: $bgimg");
226: $args{"cgi.$cgi_id.BGIMG"}=&Apache::lonnet::escape($bgimg);
227: } elsif ($target eq 'tex') {
228: # Some bg images can create latex for us... e.g. gnuplot.
229: # If it looks like we have some latex use that,
230: # otherwise, assume this is a resource name that must
231: # be converted into the latex to create an eps insertion.
232: #
233: my $src = $bgimg;
234: $src =~ s/\s+$//s;
235: $src =~ s/^\s+//s;
236:
237: #If this is a dynamically generated image, it will
238: #be in latex already, with a comment header that
239: #describes the dimensions:
240:
241: if($src =~ /^%DYNAMICIMAGE:/) {
242: $Apache::lonxml::debug = 0;
243: &Apache::lonxml::debug("Dynamic image");
244: my ($commentline, $junk) = split(/\n/, $src);
245: &Apache::lonxml::debug("Comment line was: $commentline");
246: my $trash;
247: my $initial_width;
248: ($trash, $initial_width, $height_param, $width_param) =
249: split(/:/,$commentline);
250: &Apache::lonxml::debug("internal web Width/height: $initial_width $height_param");
251: &Apache::lonxml::debug("Texwitdh: $width_param");
252: if($initial_width == 0) {
253: $initial_width = $width_param;
254: }
255: # strip off the comments since output does not always
256: # preserve \n's:
257: #
258: $src =~ s/$commentline//;
259: $scale_factor = $width_param / $initial_width;
260: $height_param = $height_param*$scale_factor;
261:
262: $label_xscale = 1.0; # $scale_factor;
263: $label_yscale = 1.0; # $scale_factor;
264:
265: &Apache::lonxml::debug("height $height_param");
266: &Apache::lonxml::debug("Width $width_param");
267: &Apache::lonxml::debug("Scale factors: $label_xscale $label_yscale");
268: my $dirty_width = $width_param + 5;
269: $result .= '\parbox{'.$dirty_width.'mm}{';
270: $result .= " $src \n";
271: $result .= '\setlength{\unitlength}{1mm}'."\n";
272: $result .= '\begin{picture}('."$height_param,$width_param)";
273: $result .= "(0,-$height_param)";
274: $result .= "\n";
275: $Apache::lonxml::debug = 0;
276:
277: } else {
278: $result.=&make_eps_image($bgimg,$parstack,$safeeval,-2);
279: }
280: }
281: }
282: return $result;
283: }
284: sub make_eps_image {
285: my ($bgimg,$parstack,$safeeval,$depth)=@_;
286: &Apache::lonxml::debug("image prior to get_eps_image: $bgimg");
287: my ($path,$file) = &Apache::londefdef::get_eps_image($bgimg);
288: &Apache::lonxml::debug("image after: $bgimg");
289: ($height_param,$width_param)=
290: &Apache::londefdef::image_size($bgimg,0.3,$parstack,$safeeval,
291: $depth,1);
292:
293: &Apache::lonxml::debug("Image size: $height_param x $width_param");
294:
295: my $dirtywidth=$width_param+5;
296: my $result ="\n".'\vspace*{2mm}\noindent'."\n".
297: '\parbox{'.$dirtywidth.
298: ' mm}{ \noindent \epsfxsize='.$width_param.
299: ' mm \epsffile{'.$path.$file.
300: '}\setlength{\unitlength}{1mm}'."\n".' \begin{picture}('.
301: $width_param.','.$height_param.')(0,-'.$height_param.')'."\n";
302: my $magick = Image::Magick->new;
303: $magick->Read($bgimg);
304: my $initial_width = $magick->Get('width');
305: &Apache::lonxml::debug("ImageMagick thinks width is; $initial_width");
306: $scale_factor = $width_param / $initial_width;
307: return $result;
308: }
309:
310: sub start_labelgroup {
311: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
312: my $result='';
313: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
314: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
315: $type =~tr/A-Z/a-z/;
316: if ($target ne 'modified' && ($name =~ /\W/ || $name =~ /^[0-9]/)) {
317: &Apache::lonxml::error("Only _ a-z A-Z and 0-9 are allowed in the name to a labelgroup, and the first character can not be a number.<br />");
318: }
319: if ($target eq 'web' || $target eq 'tex' ||
320: $target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
321: $Apache::randomlabel::groupname=$name;
322: $Apache::randomlabel::type=$type;
323: @Apache::randomlabel::xcoord = ();
324: @Apache::randomlabel::ycoord = ();
325: @Apache::randomlabel::value = ();
326: @Apache::randomlabel::label_arr = ();
327: @Apache::randomlabel::description = ();
328: } elsif ($target eq 'edit') {
329: $result.=&Apache::edit::tag_start($target,$token);
330: $result.=&Apache::edit::text_arg('Name:','name',$token).
331: &Apache::edit::select_arg('Type:','type',['text','image'],$token);
332: if (!defined($token->[2]{'TeXsize'})) {
333: $token->[2]{'TeXsize'}='\normalsize';
334: }
335: $result.=&Apache::edit::select_arg('TeX font size:','TeXsize',
336: ['\tiny','\scriptsize',
337: '\footnotesize','\small',
338: '\normalsize','\large','\Large',
339: '\LARGE','\huge','\Huge'],
340: $token);
341: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
342: } elsif ($target eq 'modified') {
343: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
344: $safeeval,'name','type',
345: 'TeXsize');
346: if ($constructtag) {
347: $result = &Apache::edit::rebuild_tag($token);
348: $result.=&Apache::edit::handle_insert();
349: }
350: }
351: return $result;
352: }
353:
354: #
355: # Utility sub to compute the width of a label.
356: #
357: sub get_label_width {
358: my $label = shift;
359: &Apache::lonxml::debug("image label = $label");
360: if (-e $label) {
361: &Apache::lonxml::debug("$label exists");
362: } else {
363: &Apache::lonxml::debug("$label does not exist");
364: }
365: my $magick = Image::Magick->new;
366: $magick->Read($label);
367: my $pixel_width = $magick->Get('width');
368: return $pixel_width * $scale_factor;
369:
370:
371: }
372:
373: sub get_label_height {
374: my $label = shift;
375: &Apache::lonxml::debug("image label = $label");
376: if (-e $label) {
377: &Apache::lonxml::debug("$label exists");
378: } else {
379: &Apache::lonxml::debug("$label does not exist");
380: }
381: my $magick = Image::Magick->new;
382: $magick->Read($label);
383: my $pixel_height = $magick->Get('height');
384: return $pixel_height * $scale_factor;
385: }
386:
387: sub add_vars {
388: my ($name,$order,$label,$labelorder,$value,$image,$safeeval) = @_;
389: if (!defined($name) || $name eq '') { return; }
390: my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
391: my $out=Apache::run::run($code,$safeeval);
392: if ($value) {
393: $code = '${'.$name."}{'value_".($order+1)."'}='".$value."';";
394: $out=Apache::run::run($code,$safeeval);
395: $code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';";
396: $out=Apache::run::run($code,$safeeval);
397: }
398: if ($image) {
399: my $code = '${'.$name."}{'image_".($order+1)."'}='".$image."';";
400: my $out=Apache::run::run($code,$safeeval);
401: }
402: $code = '${'.$name."}{'numlocations'}='".($order+1)."';";
403: $out=Apache::run::run($code,$safeeval);
404: }
405:
406: # begin to assign labels to locations
407: sub end_labelgroup {
408: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
409: my $gname = $Apache::randomlabel::groupname;
410: my $type = $Apache::randomlabel::type;
411: my $result='';
412: if ($target eq 'web' || $target eq 'answer' || $target eq 'grade' ||
413: $target eq 'analyze') {
414: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
415: &Apache::structuretags::shuffle(\@idx_arr);
416: for(0 .. $#Apache::randomlabel::label_arr) {
417: my $str;
418: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
419: my $x = $Apache::randomlabel::xcoord[$_];
420: my $y = $Apache::randomlabel::ycoord[$_];
421: my $value = $Apache::randomlabel::value[$_];
422: my $i=$Apache::randomlabel::obj_cnt++;
423: if( $type eq 'text') {
424: &add_vars($gname,$_,$label,$idx_arr[$_],$value,'',$safeeval);
425: $str = join(':',$x,$y,&Apache::lonnet::escape($label));
426: $args{"cgi.$cgi_id.OBJTYPE"}.='LABEL:';
427: } elsif ( $type eq 'image') {
428: &add_vars($gname,$_,
429: $Apache::randomlabel::description[$idx_arr[$_]],
430: $idx_arr[$_],$value,$label,$safeeval);
431: $str = join(':',$x,$y,&Apache::lonnet::escape($label));
432: $args{"cgi.$cgi_id.OBJTYPE"}.='IMAGE:';
433: } else {
434: &Apache::lonxml::error('Unknown type of label :'.$type.':');
435: }
436: if ($target eq 'web') { $args{"cgi.$cgi_id.OBJ$i"} =$str; }
437: }
438: } elsif ($target eq 'tex') {
439: my $WX1=0; # Web x-coord. of upper left corner (ULC)
440: my $WY1=0; # Web y-coord. of (ULC)
441: my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
442: my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
443: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
444: if (!defined($TeXsize)) { $TeXsize='\\normalsize'; }
445:
446: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
447: &Apache::structuretags::shuffle(\@idx_arr);
448:
449: &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
450: $Apache::lonxml::debug = 0;
451: for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
452: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
453: my $x = $Apache::randomlabel::xcoord[$i];
454: my $y = $Apache::randomlabel::ycoord[$i];
455: if ( $type eq 'text' ) {
456: # FIXME the 3.5 here is the 'height' of the letter in TeX
457: $y=$y-3.5;
458: }
459: &Apache::lonxml::debug("initially: x= $x y= $y");
460: my $value = $Apache::randomlabel::value[$i];
461: #x latex coordinate
462: my $tcX=($x)*($width_param/$wwidth);
463: &Apache::lonxml::debug("wparam = $width_param wwidth = $wwidth, texx = $tcX");
464: #y latex coordinate
465: # my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 );
466: my $tcY=$height_param-$y*($height_param/$wheight);
467: if ( $type eq 'image') {
468: my $label_height = &get_label_height($label);
469: $tcY=$tcY-$label_height;
470: }
471:
472: &Apache::lonxml::debug("hparam = $height_param wheight = $wheight texy = $tcY");
473: $tcX=sprintf('%.2f',$tcX);
474: $tcY=sprintf('%.2f',$tcY);
475: $result .= '\put('.$tcX.','.$tcY.'){';
476: if( $type eq 'text') {
477: $result.= $TeXsize.' \bf '.$label."}\n";
478: &add_vars($gname,$i,$label,$idx_arr[$i],$value,'',$safeeval);
479: } elsif ( $type eq 'image') {
480: my ($path,$file) = &Apache::londefdef::get_eps_image($label);
481: my $image_name = $path.$file;
482: my $label_width = &get_label_width($label);
483:
484: $result .= '\includegraphics[width='.$label_width.'mm]{'
485: .$image_name."}}\n";
486: &add_vars($gname,$i,
487: $Apache::randomlabel::description[$idx_arr[$i]],
488: $idx_arr[$i],$value,$label,$safeeval);
489: } else {
490: &Apache::lonxml::error('Unknown type of label :'.$type.':');
491: }
492: }
493: $Apache::lonxml::debug =0;
494: } elsif ($target eq 'edit') {
495: $result.=&Apache::edit::end_table;
496: }
497: return $result;
498: }
499:
500: # <location x="123" y="456" value="some value"/>
501: sub start_location {
502: $Apache::lonxml::debug = 0;
503: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
504: my $x= &check_int(&Apache::lonxml::get_param('x',$parstack,$safeeval),50);
505: my $y= &check_int(&Apache::lonxml::get_param('y',$parstack,$safeeval),50);
506: &Apache::lonxml::debug("x = $x y = $y");
507: $x = $x*$label_xscale;
508: $y = $y*$label_yscale;
509: &Apache::lonxml::debug(" H = $height_param W = $width_param");
510: &Apache::lonxml::debug(" XS = $label_xscale YS = $label_yscale");
511: &Apache::lonxml::debug(" X = $x Y = $y");
512: my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
513: my $result='';
514: push(@Apache::randomlabel::xcoord,$x);
515: push(@Apache::randomlabel::ycoord,$y);
516: push(@Apache::randomlabel::value,$value);
517: if ($target eq 'edit') {
518: $result.=&Apache::edit::tag_start($target,$token);
519: $result.=&Apache::edit::text_arg('X:','x',$token,4).
520: &Apache::edit::text_arg('Y:','y',$token,4).
521: &Apache::edit::entercoords('x','y','attribute','width','height').' '.
522: &Apache::edit::text_arg('Value:','value',$token).
523: &Apache::edit::end_row();
524: $result.=&Apache::edit::end_table;
525: } elsif ($target eq 'modified') {
526: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
527: $safeeval,'x','y','value');
528: if ($constructtag) {
529: $result = &Apache::edit::rebuild_tag($token);
530: $result.=&Apache::edit::handle_insert();
531: }
532: }
533: $Apache::lonxml::debug = 0;
534: return $result;
535: }
536:
537: sub end_location {
538: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
539: my @result;
540: if ($target eq 'edit') { @result=('','no') }
541: return @result;
542: }
543:
544: # <label>$var_abc</label>
545: sub start_label {
546: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
547: my $result='';
548: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
549: if ($target eq 'web' || $target eq 'tex' ||
550: $target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
551: &Apache::lonxml::startredirection;
552: } elsif ($target eq 'edit') {
553: $result.=&Apache::edit::tag_start($target,$token,"$type Label");
554: my $text=&Apache::lonxml::get_all_text("/label",$parser,$style);
555: if ($type eq 'image') {
556: $result.=&Apache::edit::end_row().
557: &Apache::edit::start_spanning_row();
558: $result.=&Apache::edit::text_arg('Description:','description',
559: $token);
560: }
561: if ($type eq 'text') { $result.="Label Text:"; }
562: if ($type eq 'image') { $result.="Path to image: "; }
563: $result.=&Apache::edit::editline('',$text,'',50).
564: &Apache::edit::end_table();
565: } elsif ($target eq 'modified') {
566: $result = '<label>';
567: if ($type eq 'image') {
568: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
569: $safeeval,
570: 'description');
571: if ($constructtag) {
572: $result = &Apache::edit::rebuild_tag($token);
573: } else {
574: $result = $token->[4];
575: }
576: }
577: $result.=&Apache::edit::modifiedfield("/label",$parser);
578: }
579: return $result;
580: }
581:
582: sub end_label {
583: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
584: my @result;
585: if ($target eq 'edit') {
586: @result=('','no') ;
587: } elsif ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
588: $target eq 'answer' || $target eq 'analyze') {
589: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
590: my $ltext=&Apache::lonxml::endredirection;
591: if ($type eq 'image') {
592: if ($target eq 'tex') {
593: # For tex targets, our image url has been potentially corrupted
594: # by prepending \'s in front of special latex symbols.
595: # For now we only worry about the _ case (most common?)
596: # There's a whole host of theim in lonxml::latex_special_symbols
597: # that could potentially have to be re-done.
598:
599: $ltext =~ s/\\_/_/g;
600: }
601: &Apache::lonxml::debug("Turning $ltext, $Apache::lonxml::pwd[-1]");
602: $ltext=&Apache::imageresponse::clean_up_image($ltext);
603: # $ltext=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],
604: # $ltext);
605: &Apache::lonxml::debug("into $ltext");
606: my $description = &Apache::lonxml::get_param('description',
607: $parstack,$safeeval);
608: push(@Apache::randomlabel::description,$description);
609: } else {
610: $ltext=~s/[\r\n]*//gs
611: }
612: push(@Apache::randomlabel::label_arr,$ltext);
613: }
614: return @result;
615: }
616:
617: 1;
618: __END__
619:
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