Annotation of loncom/homework/randomlabel.pm, revision 1.74
1.1 tsai 1: # The LearningOnline Network with CAPA
2: # random labelling tool
1.8 albertel 3: #
1.74 ! foxr 4: # $Id: randomlabel.pm,v 1.73 2005/05/16 21:58:19 foxr Exp $
1.8 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 tsai 28: # SYNTAX:
1.4 albertel 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>
1.1 tsai 37: # </labelgroup>
1.4 albertel 38: # <labelgroup name="GroupTwo" type="text">
39: # <location x="12" y="45" />
40: # <location x="32" y="65" />
41: # <location x="21" y="54" />
1.3 tsai 42: # <label>TEXT-1</label>
43: # <label>TEXT-2</label>
44: # <label>TEXT-3</label>
1.1 tsai 45: # </labelgroup>
46: # </randomlabel>
47: # ===========================================
1.3 tsai 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"
1.1 tsai 55: # ===========================================
56: package Apache::randomlabel;
1.24 sakharuk 57: use Apache::lonnet;
1.1 tsai 58: use strict;
1.13 sakharuk 59: use Apache::edit;
1.36 sakharuk 60: use Apache::File();
1.38 sakharuk 61: use Apache::Constants qw(:common :http);
1.72 foxr 62: use Image::Magick;
1.73 foxr 63: use Apache::lonplot;
1.1 tsai 64:
1.53 albertel 65: my %args;
66: my $cgi_id;
1.73 foxr 67: my $scale_factor; # image scale factor.
1.53 albertel 68:
1.13 sakharuk 69: BEGIN {
1.57 albertel 70: &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label','bgimg'));
1.1 tsai 71: }
72:
1.23 matthew 73: sub check_int {
74: # utility function to do error checking on a integer.
75: my ($num,$default) = @_;
76: $default = 100 if (! defined($default));
77: $num =~ s/\s+//g; # We dont need no stinkin white space!
78: # If it is a real, just grab the integer part.
79: ($num,undef) = split (/\./,$num) if ($num =~ /\./);
80: # set to default if what we have left doesn't match anything...
81: $num = $default unless ($num =~/^\d+$/);
82: return $num;
83: }
84:
1.64 albertel 85: my ($height_param,$width_param);
1.1 tsai 86: sub start_randomlabel {
1.47 albertel 87: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
88: my $result='';
89: push (@Apache::lonxml::namespace,'randomlabel');
1.64 albertel 90: ($height_param,$width_param)=(0,0);
1.47 albertel 91: my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
1.60 albertel 92: if ( defined($bgimg) && $bgimg !~ /^http:/ ) {
1.47 albertel 93: $bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);
1.66 raeburn 94: if (&Apache::lonnet::repcopy($bgimg) ne 'ok') {
1.47 albertel 95: $bgimg='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
96: }
1.42 www 97: }
1.59 albertel 98: $Apache::randomlabel::obj_cnt=0;
1.47 albertel 99: if ($target eq 'web') {
1.53 albertel 100: $cgi_id=&Apache::loncommon::get_cgi_id();
101: %args=();
102: $args{"cgi.$cgi_id.BGIMG"}=&Apache::lonnet::escape($bgimg);
1.64 albertel 103: } elsif ($target eq 'tex' && defined($bgimg)) {
104: $result.=&make_eps_image($bgimg,$parstack,$safeeval);
1.47 albertel 105: } elsif ($target eq 'edit') {
106: $result.=&Apache::edit::tag_start($target,$token);
107: $Apache::edit::bgimgsrc=
108: &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
109: $Apache::edit::bgimgsrccurdepth=$Apache::lonxml::curdepth;
110: $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).' ';
111: $result.=&Apache::edit::browse('bgimg').' ';
112: $result.=&Apache::edit::search('bgimg').'<br />'.
113: &Apache::edit::text_arg('Width(pixel):' ,'width' ,$token,6).
114: &Apache::edit::text_arg('Height(pixel):','height' ,$token,6).
115: &Apache::edit::text_arg('TeXWidth(mm):' ,'texwidth',$token,6).
116: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
117: } elsif ($target eq 'modified') {
118: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
119: $safeeval,'bgimg','width',
120: 'height','texwidth');
121: if ($constructtag) {
122: $result = &Apache::edit::rebuild_tag($token);
123: $result.=&Apache::edit::handle_insert();
124: }
1.31 sakharuk 125: }
1.47 albertel 126: return $result;
1.1 tsai 127: }
128:
129: sub end_randomlabel {
1.47 albertel 130: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
131: my $result='';
132: my $count;
133: pop @Apache::lonxml::namespace;
134: if ($target eq 'web') {
1.59 albertel 135: $count = $Apache::randomlabel::obj_cnt;
136: if( $count != 0) { $args{"cgi.$cgi_id.OBJCOUNT"}=$count; }
1.53 albertel 137: $result.='<img src="/adm/randomlabel.png?token='.$cgi_id.'" /><br />'."\n";
138: &Apache::lonnet::appenv(%args);
1.47 albertel 139: } elsif ($target eq 'tex') {
140: $result='\end{picture}\\\\';
1.64 albertel 141: $result.= ' \vskip -'.$height_param.' mm } \\\\ ';
1.47 albertel 142: } elsif ($target eq 'edit') {
143: $result.=&Apache::edit::end_table;
144: }
145: return $result;
1.1 tsai 146: }
147:
1.57 albertel 148: sub start_bgimg {
149: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
150: my $result='';
151: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1.64 albertel 152: &Apache::lonxml::startredirection();
1.57 albertel 153: }
154: return $result;
155: }
156:
157: sub end_bgimg {
158: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
159: my $result='';
160: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1.64 albertel 161: my $bgimg=&Apache::lonxml::endredirection();
1.57 albertel 162: if ($target eq 'web') {
163: $bgimg=&Apache::imageresponse::clean_up_image($bgimg);
164: $args{"cgi.$cgi_id.BGIMG"}=&Apache::lonnet::escape($bgimg);
165: } elsif ($target eq 'tex') {
1.73 foxr 166: # Some bg images can create latex for us... e.g. gnuplot.
167: # If it looks like we have some latex use that,
168: # otherwise, assume this is a resource name that must
169: # be converted into the latex to create an eps insertion.
170: #
171: my $src = $bgimg;
172: $src =~ s/\s+$//s;
173: $src =~ s/^\s+//s;
174:
175:
176: if ($src =~ /^\\graphicspath/) {
1.74 ! foxr 177: $height_param = $Apache::lonplot::plot{'height'};
! 178: my $initial_width= $Apache::lonplot::plot{'width'};
! 179: $width_param = $Apache::lonplot::plot{'texwidth'};
! 180: $scale_factor = $width_param / $initial_width;
! 181: $height_param = $height_param*$scale_factor;
1.73 foxr 182: &Apache::lonxml::debug("height $height_param");
183: &Apache::lonxml::debug("Width $width_param");
1.74 ! foxr 184:
1.73 foxr 185: my $dirty_width = $width_param + 5;
186: $result .= '\parbox{'.$dirty_width.'mm}{';
1.74 ! foxr 187: $result .= $src."\n";
! 188: $result .= '\setlength{\unitlength}{1mm}'."\n";
1.73 foxr 189: $result .= '\begin{picture}('."$height_param,$width_param)";
190: $result .= "(0,-$height_param)";
1.74 ! foxr 191: $result .= "\n";
! 192:
1.73 foxr 193: } else {
194:
195:
196: $result.=&make_eps_image($bgimg,$parstack,$safeeval,-2);
197: }
1.57 albertel 198: }
199: }
200: return $result;
201: }
202: sub make_eps_image {
1.64 albertel 203: my ($bgimg,$parstack,$safeeval,$depth)=@_;
1.73 foxr 204: &Apache::lonxml::debug("image prior to get_eps_image: $bgimg");
1.64 albertel 205: my ($path,$file) = &Apache::londefdef::get_eps_image($bgimg);
1.73 foxr 206: &Apache::lonxml::debug("image after: $bgimg");
1.64 albertel 207: ($height_param,$width_param)=
208: &Apache::londefdef::image_size($bgimg,0.3,$parstack,$safeeval,
209: $depth,1);
1.73 foxr 210:
211: &Apache::lonxml::debug("Image size: $height_param x $width_param");
212:
1.64 albertel 213: my $dirtywidth=$width_param+5;
1.68 foxr 214: my $result ="\n".'\vspace*{2mm}\noindent'."\n".
215: '\parbox{'.$dirtywidth.
1.64 albertel 216: ' mm}{ \noindent \epsfxsize='.$width_param.
217: ' mm \epsffile{'.$path.$file.
1.68 foxr 218: '}\setlength{\unitlength}{1mm}'."\n".' \begin{picture}('.
219: $width_param.','.$height_param.')(0,-'.$height_param.')'."\n";
1.72 foxr 220: my $magick = Image::Magick->new;
221: $magick->Read($bgimg);
222: my $initial_width = $magick->Get('width');
1.73 foxr 223: &Apache::lonxml::debug("ImageMagick thinks width is; $initial_width");
1.72 foxr 224: $scale_factor = $width_param / $initial_width;
1.57 albertel 225: return $result;
226: }
227:
1.1 tsai 228: sub start_labelgroup {
1.47 albertel 229: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
230: my $result='';
231: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
232: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
233: $type =~tr/A-Z/a-z/;
1.48 albertel 234: if ($target ne 'modified' && ($name =~ /\W/ || $name =~ /^[0-9]/)) {
235: &Apache::lonxml::error("Only _ a-z A-Z and 0-9 are allowed in the name to a labelgroup, and the first character can not be a number.<br />");
236: }
1.47 albertel 237: if ($target eq 'web' || $target eq 'tex' ||
238: $target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
239: $Apache::randomlabel::groupname=$name;
240: $Apache::randomlabel::type=$type;
241: @Apache::randomlabel::xcoord = ();
242: @Apache::randomlabel::ycoord = ();
243: @Apache::randomlabel::value = ();
244: @Apache::randomlabel::label_arr = ();
1.68 foxr 245: @Apache::randomlabel::description = ();
1.47 albertel 246: } elsif ($target eq 'edit') {
247: $result.=&Apache::edit::tag_start($target,$token);
248: $result.=&Apache::edit::text_arg('Name:','name',$token).
1.63 albertel 249: &Apache::edit::select_arg('Type:','type',['text','image'],$token);
250: if (!defined($token->[2]{'TeXsize'})) {
251: $token->[2]{'TeXsize'}='\normalsize';
252: }
253: $result.=&Apache::edit::select_arg('TeX font size:','TeXsize',
254: ['\tiny','\scriptsize',
255: '\footnotesize','\small',
256: '\normalsize','\large','\Large',
257: '\LARGE','\huge','\Huge'],
258: $token);
259: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1.47 albertel 260: } elsif ($target eq 'modified') {
261: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.63 albertel 262: $safeeval,'name','type',
263: 'TeXsize');
1.47 albertel 264: if ($constructtag) {
265: $result = &Apache::edit::rebuild_tag($token);
266: $result.=&Apache::edit::handle_insert();
267: }
1.4 albertel 268: }
1.47 albertel 269: return $result;
1.1 tsai 270: }
271:
1.72 foxr 272: #
273: # Utility sub to compute the width of a label.
274: #
275: sub get_label_width {
276: my $label = shift;
277: &Apache::lonxml::debug("image label = $label");
278: if (-e $label) {
279: &Apache::lonxml::debug("$label exists");
280: } else {
281: &Apache::lonxml::debug("$label does not exist");
282: }
283: my $magick = Image::Magick->new;
284: $magick->Read($label);
285: my $pixel_width = $magick->Get('width');
286: return $pixel_width * $scale_factor;
287:
288:
289: }
1.5 albertel 290: sub add_vars {
1.47 albertel 291: my ($name,$order,$label,$labelorder,$value,$image,$safeeval) = @_;
1.61 albertel 292: if (!defined($name) || $name eq '') { return; }
1.47 albertel 293: my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
294: my $out=Apache::run::run($code,$safeeval);
295: if ($value) {
296: $code = '${'.$name."}{'value_".($order+1)."'}='".$value."';";
297: $out=Apache::run::run($code,$safeeval);
298: $code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';";
299: $out=Apache::run::run($code,$safeeval);
300: }
301: if ($image) {
302: my $code = '${'.$name."}{'image_".($order+1)."'}='".$image."';";
303: my $out=Apache::run::run($code,$safeeval);
304: }
305: $code = '${'.$name."}{'numlocations'}='".($order+1)."';";
1.5 albertel 306: $out=Apache::run::run($code,$safeeval);
1.4 albertel 307: }
1.5 albertel 308:
1.1 tsai 309: # begin to assign labels to locations
310: sub end_labelgroup {
1.47 albertel 311: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
312: my $gname = $Apache::randomlabel::groupname;
313: my $type = $Apache::randomlabel::type;
314: my $result='';
315: if ($target eq 'web' || $target eq 'answer' || $target eq 'grade' ||
316: $target eq 'analyze') {
317: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
318: &Apache::structuretags::shuffle(\@idx_arr);
319: for(0 .. $#Apache::randomlabel::label_arr) {
320: my $str;
321: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
322: my $x = $Apache::randomlabel::xcoord[$_];
323: my $y = $Apache::randomlabel::ycoord[$_];
324: my $value = $Apache::randomlabel::value[$_];
1.59 albertel 325: my $i=$Apache::randomlabel::obj_cnt++;
1.47 albertel 326: if( $type eq 'text') {
327: &add_vars($gname,$_,$label,$idx_arr[$_],$value,'',$safeeval);
1.59 albertel 328: $str = join(':',$x,$y,&Apache::lonnet::escape($label));
329: $args{"cgi.$cgi_id.OBJTYPE"}.='LABEL:';
1.47 albertel 330: } elsif ( $type eq 'image') {
331: &add_vars($gname,$_,
332: $Apache::randomlabel::description[$idx_arr[$_]],
333: $idx_arr[$_],$value,$label,$safeeval);
1.59 albertel 334: $str = join(':',$x,$y,&Apache::lonnet::escape($label));
335: $args{"cgi.$cgi_id.OBJTYPE"}.='IMAGE:';
1.47 albertel 336: } else {
337: &Apache::lonxml::error('Unknown type of label :'.$type.':');
338: }
1.59 albertel 339: if ($target eq 'web') { $args{"cgi.$cgi_id.OBJ$i"} =$str; }
1.47 albertel 340: }
341: } elsif ($target eq 'tex') {
342: my $WX1=0; # Web x-coord. of upper left corner (ULC)
343: my $WY1=0; # Web y-coord. of (ULC)
344: my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
345: my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
1.63 albertel 346: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
347: if (!defined($TeXsize)) { $TeXsize='\\normalsize'; }
1.62 albertel 348:
1.47 albertel 349: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
350: &Apache::structuretags::shuffle(\@idx_arr);
351:
352: &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
353: for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
354: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
355: my $x = $Apache::randomlabel::xcoord[$i];
1.62 albertel 356: # FIXME the 3.5 here is the 'height' of the letter in TeX
357: my $y = $Apache::randomlabel::ycoord[$i]-3.5;
1.47 albertel 358: my $value = $Apache::randomlabel::value[$i];
359: #x latex coordinate
1.64 albertel 360: my $tcX=($x)*($width_param/$wwidth);
1.47 albertel 361: #y latex coordinate
362: # my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 );
1.64 albertel 363: my $tcY=$height_param-$y*($height_param/$wheight);
1.47 albertel 364: $tcX=sprintf('%.2f',$tcX);
365: $tcY=sprintf('%.2f',$tcY);
1.70 foxr 366: $result .= '\put('.$tcX.','.$tcY.'){';
1.47 albertel 367: if( $type eq 'text') {
1.70 foxr 368: $result.= $TeXsize.' \bf '.$label."}\n";
1.47 albertel 369: &add_vars($gname,$i,$label,$idx_arr[$i],$value,'',$safeeval);
370: } elsif ( $type eq 'image') {
1.71 foxr 371: my ($path,$file) = &Apache::londefdef::get_eps_image($label);
372: my $image_name = $path.$file;
1.72 foxr 373: my $label_width = get_label_width($label);
374:
375: $result .= '\includegraphics[width='.$label_width.'mm]{'
1.71 foxr 376: .$image_name."}}\n";
1.47 albertel 377: &add_vars($gname,$i,
378: $Apache::randomlabel::description[$idx_arr[$i]],
379: $idx_arr[$i],$value,$label,$safeeval);
380: } else {
381: &Apache::lonxml::error('Unknown type of label :'.$type.':');
382: }
383: }
384: } elsif ($target eq 'edit') {
385: $result.=&Apache::edit::end_table;
1.3 tsai 386: }
1.47 albertel 387: return $result;
1.1 tsai 388: }
389:
1.5 albertel 390: # <location x="123" y="456" value="some value"/>
1.1 tsai 391: sub start_location {
1.47 albertel 392: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
393: my $x= &check_int(&Apache::lonxml::get_param('x',$parstack,$safeeval),50);
394: my $y= &check_int(&Apache::lonxml::get_param('y',$parstack,$safeeval),50);
395: my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
396: my $result='';
397: push(@Apache::randomlabel::xcoord,$x);
398: push(@Apache::randomlabel::ycoord,$y);
399: push(@Apache::randomlabel::value,$value);
400: if ($target eq 'edit') {
401: $result.=&Apache::edit::tag_start($target,$token);
402: $result.=&Apache::edit::text_arg('X:','x',$token,4).
403: &Apache::edit::text_arg('Y:','y',$token,4).
404: &Apache::edit::entercoords('x','y','attribute','width','height').' '.
405: &Apache::edit::text_arg('Value:','value',$token).
406: &Apache::edit::end_row();
407: $result.=&Apache::edit::end_table;
408: } elsif ($target eq 'modified') {
409: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
410: $safeeval,'x','y','value');
411: if ($constructtag) {
412: $result = &Apache::edit::rebuild_tag($token);
413: $result.=&Apache::edit::handle_insert();
414: }
1.4 albertel 415: }
1.47 albertel 416: return $result;
1.1 tsai 417: }
418:
419: sub end_location {
1.47 albertel 420: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
421: my @result;
422: if ($target eq 'edit') { @result=('','no') }
423: return @result;
1.1 tsai 424: }
425:
1.2 tsai 426: # <label>$var_abc</label>
1.1 tsai 427: sub start_label {
1.47 albertel 428: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
429: my $result='';
430: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
431: if ($target eq 'web' || $target eq 'tex' ||
432: $target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
1.57 albertel 433: &Apache::lonxml::startredirection;
1.47 albertel 434: } elsif ($target eq 'edit') {
435: $result.=&Apache::edit::tag_start($target,$token,"$type Label");
436: my $text=&Apache::lonxml::get_all_text("/label",$parser);
437: if ($type eq 'image') {
438: $result.=&Apache::edit::end_row().
439: &Apache::edit::start_spanning_row();
440: $result.=&Apache::edit::text_arg('Description:','description',
441: $token);
442: }
443: if ($type eq 'text') { $result.="Label Text:"; }
444: if ($type eq 'image') { $result.="Path to image: "; }
445: $result.=&Apache::edit::editline('',$text,'',50).
446: &Apache::edit::end_table();
447: } elsif ($target eq 'modified') {
448: $result = '<label>';
449: if ($type eq 'image') {
450: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
451: $safeeval,
452: 'description');
453: if ($constructtag) {
454: $result = &Apache::edit::rebuild_tag($token);
455: } else {
456: $result = $token->[4];
457: }
458: }
1.52 albertel 459: $result.=&Apache::edit::modifiedfield("/label",$parser);
1.26 albertel 460: }
1.47 albertel 461: return $result;
1.1 tsai 462: }
463:
464: sub end_label {
1.47 albertel 465: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
466: my @result;
1.57 albertel 467: if ($target eq 'edit') {
468: @result=('','no') ;
469: } elsif ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
470: $target eq 'answer' || $target eq 'analyze') {
471: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
472: my $ltext=&Apache::lonxml::endredirection;
473: if ($type eq 'image') {
1.70 foxr 474: if ($target eq 'tex') {
475: # For tex targets, our image url has been potentially corrupted
476: # by prepending \'s in front of special latex symbols.
477: # For now we only worry about the _ case (most common?)
478: # There's a whole host of theim in lonxml::latex_special_symbols
479: # that could potentially have to be re-done.
480:
481: $ltext =~ s/\\_/_/g;
482: }
1.57 albertel 483: &Apache::lonxml::debug("Turning $ltext, $Apache::lonxml::pwd[-1]");
484: $ltext=&Apache::imageresponse::clean_up_image($ltext);
485: # $ltext=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],
486: # $ltext);
487: &Apache::lonxml::debug("into $ltext");
488: my $description = &Apache::lonxml::get_param('description',
489: $parstack,$safeeval);
490: push(@Apache::randomlabel::description,$description);
1.61 albertel 491: } else {
492: $ltext=~s/[\r\n]*//gs
1.57 albertel 493: }
494: push(@Apache::randomlabel::label_arr,$ltext);
495: }
1.47 albertel 496: return @result;
1.1 tsai 497: }
498:
499: 1;
500: __END__
501:
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