1: # The LearningOnline Network with CAPA
2: # random labelling tool
3: #
4: # $Id: randomlabel.pm,v 1.82 2006/05/30 12:45:37 www 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: use lib '/home/httpd/lib/perl/';
65: use LONCAPA;
66:
67:
68: my %args;
69: my $cgi_id;
70: my $scale_factor; # image scale factor.
71: my $label_xscale; # Label scale factor (needed for gnuplot).
72: my $label_yscale;
73:
74:
75: BEGIN {
76: &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label','bgimg'));
77: }
78:
79:
80:
81: sub check_int {
82: # utility function to do error checking on a integer.
83: my ($num,$default) = @_;
84: $default = 100 if (! defined($default));
85: $num =~ s/\s+//g; # We dont need no stinkin white space!
86: # If it is a real, just grab the integer part.
87: ($num,undef) = split (/\./,$num) if ($num =~ /\./);
88: # set to default if what we have left doesn't match anything...
89: $num = $default unless ($num =~/^\d+$/);
90: return $num;
91: }
92:
93: # Get width/height from an image tag...
94: #
95: # Parameters:
96: # tag - tag potentially containing height/width attributes.
97: # def_width - Default width.
98: # def_height - Default height.
99: # Returns:
100: # list containing width/height.
101: #
102: sub extract_tag_sizes {
103: my ($tag, $dw, $dh) = @_;
104: $tag =~ s/\s+/ /g; # Collapse whitespace.
105: $tag =~ s/\s*=\s*/=/g; # kill space around ='s.
106: $tag =~ s/[<>\"]//g; # Get rid of the <">'s too.
107:
108: &Apache::lonxml::debug("Compressed tag: $tag");
109: my @taglist = split(/ /,$tag);
110: foreach my $attribute (@taglist) {
111: if ($attribute =~ /^width/i) {
112: my ($e, $s)= split(/=/,$attribute);
113: $dw = $s;
114: }
115: if ($attribute =~ /^height/i) {
116: my ($e, $s) = split(/=/,$attribute);
117: $dh = $s;
118: }
119: }
120: return($dw, $dh);
121:
122: }
123:
124: my ($height_param,$width_param);
125: sub start_randomlabel {
126:
127: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
128: my $result='';
129: push (@Apache::lonxml::namespace,'randomlabel');
130: ($height_param,$width_param)=(0,0);
131: $label_xscale = 1.0; # Assume image size not overridden.
132: $label_yscale = 1.0;
133: my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
134: if ( defined($bgimg) && $bgimg !~ /^http:/ ) {
135: $bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);
136: if (&Apache::lonnet::repcopy($bgimg) ne 'ok') {
137: $bgimg='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
138: }
139: }
140: $Apache::randomlabel::obj_cnt=0;
141: if ($target eq 'web') {
142: $cgi_id=&Apache::loncommon::get_cgi_id();
143: %args=();
144: $args{"cgi.$cgi_id.BGIMG"}=&escape($bgimg);
145: $height_param = &Apache::lonxml::get_param('height',$parstack, $safeeval);
146: $width_param = &Apache::lonxml::get_param('width', $parstack, $safeeval);
147: } elsif ($target eq 'tex' && defined($bgimg)) {
148: $result.=&make_eps_image($bgimg,$parstack,$safeeval);
149: } elsif ($target eq 'edit') {
150: $result.=&Apache::edit::tag_start($target,$token);
151: $Apache::edit::bgimgsrc=
152: &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
153: $Apache::edit::bgimgsrccurdepth=$Apache::lonxml::curdepth;
154: $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).' ';
155: $result.=&Apache::edit::browse('bgimg').' ';
156: $result.=&Apache::edit::search('bgimg').'<br />'.
157: &Apache::edit::text_arg('Width(pixel):' ,'width' ,$token,6).
158: &Apache::edit::text_arg('Height(pixel):','height' ,$token,6).
159: &Apache::edit::text_arg('TeXWidth(mm):' ,'texwidth',$token,6).
160: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
161: } elsif ($target eq 'modified') {
162: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
163: $safeeval,'bgimg','width',
164: 'height','texwidth');
165: if ($constructtag) {
166: $result = &Apache::edit::rebuild_tag($token);
167: $result.=&Apache::edit::handle_insert();
168: }
169: }
170: return $result;
171: }
172:
173: sub end_randomlabel {
174: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
175: my $result='';
176: my $count;
177: pop @Apache::lonxml::namespace;
178: if ($target eq 'web') {
179: $count = $Apache::randomlabel::obj_cnt;
180: if( $count != 0) { $args{"cgi.$cgi_id.OBJCOUNT"}=$count; }
181: $result.='<img src="/adm/randomlabel.png?token='.$cgi_id.'" /><br />'."\n";
182: &Apache::lonnet::appenv(%args);
183: } elsif ($target eq 'tex') {
184: $result='\end{picture}\\\\';
185: $result.= ' \vskip -'.$height_param.' mm } \\\\ ';
186: } elsif ($target eq 'edit') {
187: $result.=&Apache::edit::end_table;
188: }
189: return $result;
190: }
191:
192:
193: sub start_bgimg {
194: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
195: my $result='';
196: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
197: &Apache::lonxml::startredirection();
198: }
199: return $result;
200: }
201:
202: sub end_bgimg {
203: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
204: my $result='';
205: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
206: my $bgimg=&Apache::lonxml::endredirection();
207: if ($target eq 'web') {
208:
209: # If the tag produced has sizes, they override ours.
210: # (for now anyway).
211: #
212: &Apache::lonxml::debug("Base sizes: $width_param x $height_param");
213:
214: my ($plot_x, $plot_y) = &extract_tag_sizes($bgimg,
215: $width_param,
216: $height_param);
217: &Apache::lonxml::debug("Extracted sizes: $plot_x x $plot_y");
218: if ($width_param) {
219: $label_xscale = $plot_x / $width_param;
220: }
221: if ($height_param) {
222: $label_yscale = $plot_y / $height_param;
223: }
224: &Apache::lonxml::debug("Scale factors: $label_xscale $label_yscale");
225:
226: &Apache::lonxml::debug("Image: $bgimg");
227: $bgimg=&Apache::imageresponse::clean_up_image($bgimg);
228: &Apache::lonxml::debug("Cleaned image: $bgimg");
229: $args{"cgi.$cgi_id.BGIMG"}=&escape($bgimg);
230: } elsif ($target eq 'tex') {
231: # Some bg images can create latex for us... e.g. gnuplot.
232: # If it looks like we have some latex use that,
233: # otherwise, assume this is a resource name that must
234: # be converted into the latex to create an eps insertion.
235: #
236: my $src = $bgimg;
237: $src =~ s/\s+$//s;
238: $src =~ s/^\s+//s;
239:
240: #If this is a dynamically generated image, it will
241: #be in latex already, with a comment header that
242: #describes the dimensions:
243:
244: if($src =~ /^%DYNAMICIMAGE:/) {
245: $Apache::lonxml::debug = 0;
246: &Apache::lonxml::debug("Dynamic image");
247: my ($commentline, $junk) = split(/\n/, $src);
248: &Apache::lonxml::debug("Comment line was: $commentline");
249: my $trash;
250: my $initial_width;
251: ($trash, $initial_width, $height_param, $width_param) =
252: split(/:/,$commentline);
253: &Apache::lonxml::debug("internal web Width/height: $initial_width $height_param");
254: &Apache::lonxml::debug("Texwitdh: $width_param");
255: if($initial_width == 0) {
256: $initial_width = $width_param;
257: }
258: # strip off the comments since output does not always
259: # preserve \n's:
260: #
261: $src =~ s/$commentline//;
262: $scale_factor = $width_param / $initial_width;
263: $height_param = $height_param*$scale_factor;
264:
265: $label_xscale = 1.0; # $scale_factor;
266: $label_yscale = 1.0; # $scale_factor;
267:
268: &Apache::lonxml::debug("height $height_param");
269: &Apache::lonxml::debug("Width $width_param");
270: &Apache::lonxml::debug("Scale factors: $label_xscale $label_yscale");
271: my $dirty_width = $width_param + 5;
272: $result .= '\parbox{'.$dirty_width.'mm}{';
273: $result .= " $src \n";
274: $result .= '\setlength{\unitlength}{1mm}'."\n";
275: $result .= '\begin{picture}('."$height_param,$width_param)";
276: $result .= "(0,-$height_param)";
277: $result .= "\n";
278: $Apache::lonxml::debug = 0;
279:
280: } else {
281: $result.=&make_eps_image($bgimg,$parstack,$safeeval,-2);
282: }
283: }
284: }
285: return $result;
286: }
287: sub make_eps_image {
288: my ($bgimg,$parstack,$safeeval,$depth)=@_;
289: &Apache::lonxml::debug("image prior to get_eps_image: $bgimg");
290: my ($path,$file) = &Apache::londefdef::get_eps_image($bgimg);
291: &Apache::lonxml::debug("image after: $bgimg");
292: ($height_param,$width_param)=
293: &Apache::londefdef::image_size($bgimg,0.3,$parstack,$safeeval,
294: $depth,1);
295:
296: &Apache::lonxml::debug("Image size: $height_param x $width_param");
297:
298: my $dirtywidth=$width_param+5;
299: my $result ="\n".'\vspace*{2mm}\noindent'."\n".
300: '\parbox{'.$dirtywidth.
301: ' mm}{ \noindent \epsfxsize='.$width_param.
302: ' mm \epsffile{'.$path.$file.
303: '}\setlength{\unitlength}{1mm}'."\n".' \begin{picture}('.
304: $width_param.','.$height_param.')(0,-'.$height_param.')'."\n";
305: my $magick = Image::Magick->new;
306: $magick->Read($bgimg);
307: my $initial_width = $magick->Get('width');
308: &Apache::lonxml::debug("ImageMagick thinks width is; $initial_width");
309: $scale_factor = $width_param / $initial_width;
310: return $result;
311: }
312:
313: sub start_labelgroup {
314: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
315: my $result='';
316: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
317: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
318: $type =~tr/A-Z/a-z/;
319: if ($target ne 'modified' && ($name =~ /\W/ || $name =~ /^[0-9]/)) {
320: &Apache::lonxml::error("Only _ a-z A-Z and 0-9 are allowed in the name to a labelgroup, and the first character can not be a number.<br />");
321: }
322: if ($target eq 'web' || $target eq 'tex' ||
323: $target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
324: $Apache::randomlabel::groupname=$name;
325: $Apache::randomlabel::type=$type;
326: @Apache::randomlabel::xcoord = ();
327: @Apache::randomlabel::ycoord = ();
328: @Apache::randomlabel::value = ();
329: @Apache::randomlabel::label_arr = ();
330: @Apache::randomlabel::description = ();
331: } elsif ($target eq 'edit') {
332: $result.=&Apache::edit::tag_start($target,$token);
333: $result.=&Apache::edit::text_arg('Name:','name',$token).
334: &Apache::edit::select_arg('Type:','type',['text','image'],$token);
335: if (!defined($token->[2]{'TeXsize'})) {
336: $token->[2]{'TeXsize'}='\normalsize';
337: }
338: $result.=&Apache::edit::select_arg('TeX font size:','TeXsize',
339: ['\tiny','\scriptsize',
340: '\footnotesize','\small',
341: '\normalsize','\large','\Large',
342: '\LARGE','\huge','\Huge'],
343: $token);
344: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
345: } elsif ($target eq 'modified') {
346: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
347: $safeeval,'name','type',
348: 'TeXsize');
349: if ($constructtag) {
350: $result = &Apache::edit::rebuild_tag($token);
351: $result.=&Apache::edit::handle_insert();
352: }
353: }
354: return $result;
355: }
356:
357: #
358: # Utility sub to compute the width of a label.
359: #
360: sub get_label_width {
361: my $label = shift;
362: &Apache::lonxml::debug("image label = $label");
363: if (-e $label) {
364: &Apache::lonxml::debug("$label exists");
365: } else {
366: &Apache::lonxml::debug("$label does not exist");
367: }
368: my $magick = Image::Magick->new;
369: $magick->Read($label);
370: my $pixel_width = $magick->Get('width');
371: return $pixel_width * $scale_factor;
372:
373:
374: }
375:
376: sub get_label_height {
377: my $label = shift;
378: &Apache::lonxml::debug("image label = $label");
379: if (-e $label) {
380: &Apache::lonxml::debug("$label exists");
381: } else {
382: &Apache::lonxml::debug("$label does not exist");
383: }
384: my $magick = Image::Magick->new;
385: $magick->Read($label);
386: my $pixel_height = $magick->Get('height');
387: return $pixel_height * $scale_factor;
388: }
389:
390: sub add_vars {
391: my ($name,$order,$label,$labelorder,$value,$image,$safeeval) = @_;
392: if (!defined($name) || $name eq '') { return; }
393: my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
394: my $out=Apache::run::run($code,$safeeval);
395: if ($value) {
396: $code = '${'.$name."}{'value_".($order+1)."'}='".$value."';";
397: $out=Apache::run::run($code,$safeeval);
398: $code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';";
399: $out=Apache::run::run($code,$safeeval);
400: }
401: if ($image) {
402: my $code = '${'.$name."}{'image_".($order+1)."'}='".$image."';";
403: my $out=Apache::run::run($code,$safeeval);
404: }
405: $code = '${'.$name."}{'numlocations'}='".($order+1)."';";
406: $out=Apache::run::run($code,$safeeval);
407: }
408:
409: # begin to assign labels to locations
410: sub end_labelgroup {
411: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
412: my $gname = $Apache::randomlabel::groupname;
413: my $type = $Apache::randomlabel::type;
414: my $result='';
415: if ($target eq 'web' || $target eq 'answer' || $target eq 'grade' ||
416: $target eq 'analyze') {
417: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
418: &Apache::structuretags::shuffle(\@idx_arr);
419: for(0 .. $#Apache::randomlabel::label_arr) {
420: my $str;
421: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
422: my $x = $Apache::randomlabel::xcoord[$_];
423: my $y = $Apache::randomlabel::ycoord[$_];
424: my $value = $Apache::randomlabel::value[$_];
425: my $i=$Apache::randomlabel::obj_cnt++;
426: if( $type eq 'text') {
427: &add_vars($gname,$_,$label,$idx_arr[$_],$value,'',$safeeval);
428: $str = join(':',$x,$y,&escape($label));
429: $args{"cgi.$cgi_id.OBJTYPE"}.='LABEL:';
430: } elsif ( $type eq 'image') {
431: &add_vars($gname,$_,
432: $Apache::randomlabel::description[$idx_arr[$_]],
433: $idx_arr[$_],$value,$label,$safeeval);
434: $str = join(':',$x,$y,&escape($label));
435: $args{"cgi.$cgi_id.OBJTYPE"}.='IMAGE:';
436: } else {
437: &Apache::lonxml::error('Unknown type of label :'.$type.':');
438: }
439: if ($target eq 'web') { $args{"cgi.$cgi_id.OBJ$i"} =$str; }
440: }
441: } elsif ($target eq 'tex') {
442: my $WX1=0; # Web x-coord. of upper left corner (ULC)
443: my $WY1=0; # Web y-coord. of (ULC)
444: my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
445: my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
446: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
447: if (!defined($TeXsize)) { $TeXsize='\\normalsize'; }
448:
449: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
450: &Apache::structuretags::shuffle(\@idx_arr);
451:
452: &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
453: $Apache::lonxml::debug = 0;
454: for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
455: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
456: my $x = $Apache::randomlabel::xcoord[$i];
457: my $y = $Apache::randomlabel::ycoord[$i];
458: if ( $type eq 'text' ) {
459: # FIXME the 3.5 here is the 'height' of the letter in TeX
460: $y=$y-3.5;
461: }
462: &Apache::lonxml::debug("initially: x= $x y= $y");
463: my $value = $Apache::randomlabel::value[$i];
464: #x latex coordinate
465: my $tcX=($x)*($width_param/$wwidth);
466: &Apache::lonxml::debug("wparam = $width_param wwidth = $wwidth, texx = $tcX");
467: #y latex coordinate
468: # my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 );
469: my $tcY=$height_param-$y*($height_param/$wheight);
470: if ( $type eq 'image') {
471: my $label_height = &get_label_height($label);
472: $tcY=$tcY-$label_height;
473: }
474:
475: &Apache::lonxml::debug("hparam = $height_param wheight = $wheight texy = $tcY");
476: $tcX=sprintf('%.2f',$tcX);
477: $tcY=sprintf('%.2f',$tcY);
478: $result .= '\put('.$tcX.','.$tcY.'){';
479: if( $type eq 'text') {
480: $result.= $TeXsize.' \bf '.$label."}\n";
481: &add_vars($gname,$i,$label,$idx_arr[$i],$value,'',$safeeval);
482: } elsif ( $type eq 'image') {
483: my ($path,$file) = &Apache::londefdef::get_eps_image($label);
484: my $image_name = $path.$file;
485: my $label_width = &get_label_width($label);
486:
487: $result .= '\includegraphics[width='.$label_width.'mm]{'
488: .$image_name."}}\n";
489: &add_vars($gname,$i,
490: $Apache::randomlabel::description[$idx_arr[$i]],
491: $idx_arr[$i],$value,$label,$safeeval);
492: } else {
493: &Apache::lonxml::error('Unknown type of label :'.$type.':');
494: }
495: }
496: $Apache::lonxml::debug =0;
497: } elsif ($target eq 'edit') {
498: $result.=&Apache::edit::end_table;
499: }
500: return $result;
501: }
502:
503: # <location x="123" y="456" value="some value"/>
504: sub start_location {
505: $Apache::lonxml::debug = 0;
506: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
507: my $x= &check_int(&Apache::lonxml::get_param('x',$parstack,$safeeval),50);
508: my $y= &check_int(&Apache::lonxml::get_param('y',$parstack,$safeeval),50);
509: &Apache::lonxml::debug("x = $x y = $y");
510: $x = $x*$label_xscale;
511: $y = $y*$label_yscale;
512: &Apache::lonxml::debug(" H = $height_param W = $width_param");
513: &Apache::lonxml::debug(" XS = $label_xscale YS = $label_yscale");
514: &Apache::lonxml::debug(" X = $x Y = $y");
515: my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
516: my $result='';
517: push(@Apache::randomlabel::xcoord,$x);
518: push(@Apache::randomlabel::ycoord,$y);
519: push(@Apache::randomlabel::value,$value);
520: if ($target eq 'edit') {
521: $result.=&Apache::edit::tag_start($target,$token);
522: $result.=&Apache::edit::text_arg('X:','x',$token,4).
523: &Apache::edit::text_arg('Y:','y',$token,4).
524: &Apache::edit::entercoords('x','y','attribute','width','height').' '.
525: &Apache::edit::text_arg('Value:','value',$token).
526: &Apache::edit::end_row();
527: $result.=&Apache::edit::end_table;
528: } elsif ($target eq 'modified') {
529: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
530: $safeeval,'x','y','value');
531: if ($constructtag) {
532: $result = &Apache::edit::rebuild_tag($token);
533: $result.=&Apache::edit::handle_insert();
534: }
535: }
536: $Apache::lonxml::debug = 0;
537: return $result;
538: }
539:
540: sub end_location {
541: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
542: my @result;
543: if ($target eq 'edit') { @result=('','no') }
544: return @result;
545: }
546:
547: # <label>$var_abc</label>
548: sub start_label {
549: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
550: my $result='';
551: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
552: if ($target eq 'web' || $target eq 'tex' ||
553: $target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
554: &Apache::lonxml::startredirection;
555: } elsif ($target eq 'edit') {
556: $result.=&Apache::edit::tag_start($target,$token,"$type Label");
557: my $text=&Apache::lonxml::get_all_text("/label",$parser,$style);
558: if ($type eq 'image') {
559: $result.=&Apache::edit::end_row().
560: &Apache::edit::start_spanning_row();
561: $result.=&Apache::edit::text_arg('Description:','description',
562: $token);
563: }
564: if ($type eq 'text') { $result.="Label Text:"; }
565: if ($type eq 'image') { $result.="Path to image: "; }
566: $result.=&Apache::edit::editline('',$text,'',50).
567: &Apache::edit::end_table();
568: } elsif ($target eq 'modified') {
569: $result = '<label>';
570: if ($type eq 'image') {
571: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
572: $safeeval,
573: 'description');
574: if ($constructtag) {
575: $result = &Apache::edit::rebuild_tag($token);
576: } else {
577: $result = $token->[4];
578: }
579: }
580: $result.=&Apache::edit::modifiedfield("/label",$parser);
581: }
582: return $result;
583: }
584:
585: sub end_label {
586: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
587: my @result;
588: if ($target eq 'edit') {
589: @result=('','no') ;
590: } elsif ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
591: $target eq 'answer' || $target eq 'analyze') {
592: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
593: my $ltext=&Apache::lonxml::endredirection;
594: if ($type eq 'image') {
595: if ($target eq 'tex') {
596: # For tex targets, our image url has been potentially corrupted
597: # by prepending \'s in front of special latex symbols.
598: # For now we only worry about the _ case (most common?)
599: # There's a whole host of theim in lonxml::latex_special_symbols
600: # that could potentially have to be re-done.
601:
602: $ltext =~ s/\\_/_/g;
603: }
604: &Apache::lonxml::debug("Turning $ltext, $Apache::lonxml::pwd[-1]");
605: $ltext=&Apache::imageresponse::clean_up_image($ltext);
606: # $ltext=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],
607: # $ltext);
608: &Apache::lonxml::debug("into $ltext");
609: my $description = &Apache::lonxml::get_param('description',
610: $parstack,$safeeval);
611: push(@Apache::randomlabel::description,$description);
612: } else {
613: $ltext=~s/[\r\n]*//gs
614: }
615: push(@Apache::randomlabel::label_arr,$ltext);
616: }
617: return @result;
618: }
619:
620: 1;
621: __END__
622:
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