Annotation of loncom/homework/randomlabel.pm, revision 1.76
1.1 tsai 1: # The LearningOnline Network with CAPA
2: # random labelling tool
1.8 albertel 3: #
1.76 ! foxr 4: # $Id: randomlabel.pm,v 1.75 2005/05/24 10:10:16 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.
1.75 foxr 68: my $label_xscale; # Label scale factor (needed for gnuplot).
69: my $label_yscale;
1.76 ! foxr 70: my $gnuplot_background; # This will be true if a gnuplot backgound
! 71:
! 72:
1.13 sakharuk 73: BEGIN {
1.57 albertel 74: &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label','bgimg'));
1.1 tsai 75: }
76:
1.76 ! foxr 77: # Gnuplot calback called if a </gnuplot> tag is encountered:
! 78: #
! 79: sub gnuplot_handler {
! 80: $gnuplot_background = 1;
! 81: }
! 82:
1.23 matthew 83: sub check_int {
84: # utility function to do error checking on a integer.
85: my ($num,$default) = @_;
86: $default = 100 if (! defined($default));
87: $num =~ s/\s+//g; # We dont need no stinkin white space!
88: # If it is a real, just grab the integer part.
89: ($num,undef) = split (/\./,$num) if ($num =~ /\./);
90: # set to default if what we have left doesn't match anything...
91: $num = $default unless ($num =~/^\d+$/);
92: return $num;
93: }
94:
1.64 albertel 95: my ($height_param,$width_param);
1.1 tsai 96: sub start_randomlabel {
1.76 ! foxr 97:
1.47 albertel 98: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.76 ! foxr 99: $gnuplot_background = 0;
! 100: &Apache::lonplot::register_callback(\&gnuplot_handler);
1.47 albertel 101: my $result='';
102: push (@Apache::lonxml::namespace,'randomlabel');
1.64 albertel 103: ($height_param,$width_param)=(0,0);
1.75 foxr 104: $label_xscale = 1.0; # Assume image size not overridden.
105: $label_yscale = 1.0;
1.47 albertel 106: my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
1.60 albertel 107: if ( defined($bgimg) && $bgimg !~ /^http:/ ) {
1.47 albertel 108: $bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);
1.66 raeburn 109: if (&Apache::lonnet::repcopy($bgimg) ne 'ok') {
1.47 albertel 110: $bgimg='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
111: }
1.42 www 112: }
1.59 albertel 113: $Apache::randomlabel::obj_cnt=0;
1.47 albertel 114: if ($target eq 'web') {
1.53 albertel 115: $cgi_id=&Apache::loncommon::get_cgi_id();
116: %args=();
117: $args{"cgi.$cgi_id.BGIMG"}=&Apache::lonnet::escape($bgimg);
1.75 foxr 118: $height_param = &Apache::lonxml::get_param('height',$parstack, $safeeval);
119: $width_param = &Apache::lonxml::get_param('width', $parstack, $safeeval);
1.64 albertel 120: } elsif ($target eq 'tex' && defined($bgimg)) {
121: $result.=&make_eps_image($bgimg,$parstack,$safeeval);
1.47 albertel 122: } elsif ($target eq 'edit') {
123: $result.=&Apache::edit::tag_start($target,$token);
124: $Apache::edit::bgimgsrc=
125: &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
126: $Apache::edit::bgimgsrccurdepth=$Apache::lonxml::curdepth;
127: $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).' ';
128: $result.=&Apache::edit::browse('bgimg').' ';
129: $result.=&Apache::edit::search('bgimg').'<br />'.
130: &Apache::edit::text_arg('Width(pixel):' ,'width' ,$token,6).
131: &Apache::edit::text_arg('Height(pixel):','height' ,$token,6).
132: &Apache::edit::text_arg('TeXWidth(mm):' ,'texwidth',$token,6).
133: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
134: } elsif ($target eq 'modified') {
135: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
136: $safeeval,'bgimg','width',
137: 'height','texwidth');
138: if ($constructtag) {
139: $result = &Apache::edit::rebuild_tag($token);
140: $result.=&Apache::edit::handle_insert();
141: }
1.31 sakharuk 142: }
1.47 albertel 143: return $result;
1.1 tsai 144: }
145:
146: sub end_randomlabel {
1.47 albertel 147: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
148: my $result='';
149: my $count;
150: pop @Apache::lonxml::namespace;
151: if ($target eq 'web') {
1.59 albertel 152: $count = $Apache::randomlabel::obj_cnt;
153: if( $count != 0) { $args{"cgi.$cgi_id.OBJCOUNT"}=$count; }
1.53 albertel 154: $result.='<img src="/adm/randomlabel.png?token='.$cgi_id.'" /><br />'."\n";
155: &Apache::lonnet::appenv(%args);
1.47 albertel 156: } elsif ($target eq 'tex') {
157: $result='\end{picture}\\\\';
1.64 albertel 158: $result.= ' \vskip -'.$height_param.' mm } \\\\ ';
1.47 albertel 159: } elsif ($target eq 'edit') {
160: $result.=&Apache::edit::end_table;
161: }
1.76 ! foxr 162: &Apache::lonplot::clear_callback();
1.47 albertel 163: return $result;
1.1 tsai 164: }
165:
1.57 albertel 166: sub start_bgimg {
167: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
168: my $result='';
169: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1.64 albertel 170: &Apache::lonxml::startredirection();
1.57 albertel 171: }
172: return $result;
173: }
174:
175: sub end_bgimg {
176: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
177: my $result='';
178: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1.64 albertel 179: my $bgimg=&Apache::lonxml::endredirection();
1.57 albertel 180: if ($target eq 'web') {
1.75 foxr 181: # Try to determine if this is a gnu plot image in which
182: # case it's size overrides the web size.
183: # If it's a gnuplot the uncleaned image will have
184: # the text "dynamically generated plot"
185: # and "cgi-bin/plot.gif?"
1.76 ! foxr 186: if ( $gnuplot_background) {
1.75 foxr 187: &Apache::lonxml::debug("Gnuplot image!");
188: my $plot_x = $Apache::lonplot::plot{'width'};
189: my $plot_y = $Apache::lonplot::plot{'height'};
190: &Apache::lonxml::debug(" H = $plot_y W = $plot_x");
191: &Apache::lonxml::debug("PH = $height_param, PW = $width_param");
192: $label_xscale = $plot_x/$width_param;
193: $label_yscale = $plot_y/$height_param;
194: }
195: &Apache::lonxml::debug("Image: $bgimg");
1.57 albertel 196: $bgimg=&Apache::imageresponse::clean_up_image($bgimg);
1.75 foxr 197: &Apache::lonxml::debug("Cleaned image: $bgimg");
1.57 albertel 198: $args{"cgi.$cgi_id.BGIMG"}=&Apache::lonnet::escape($bgimg);
199: } elsif ($target eq 'tex') {
1.73 foxr 200: # Some bg images can create latex for us... e.g. gnuplot.
201: # If it looks like we have some latex use that,
202: # otherwise, assume this is a resource name that must
203: # be converted into the latex to create an eps insertion.
204: #
205: my $src = $bgimg;
206: $src =~ s/\s+$//s;
207: $src =~ s/^\s+//s;
208:
209:
1.76 ! foxr 210: if ($gnuplot_background) {
1.74 foxr 211: $height_param = $Apache::lonplot::plot{'height'};
212: my $initial_width= $Apache::lonplot::plot{'width'};
213: $width_param = $Apache::lonplot::plot{'texwidth'};
214: $scale_factor = $width_param / $initial_width;
215: $height_param = $height_param*$scale_factor;
1.73 foxr 216: &Apache::lonxml::debug("height $height_param");
217: &Apache::lonxml::debug("Width $width_param");
1.74 foxr 218:
1.73 foxr 219: my $dirty_width = $width_param + 5;
220: $result .= '\parbox{'.$dirty_width.'mm}{';
1.74 foxr 221: $result .= $src."\n";
222: $result .= '\setlength{\unitlength}{1mm}'."\n";
1.73 foxr 223: $result .= '\begin{picture}('."$height_param,$width_param)";
224: $result .= "(0,-$height_param)";
1.74 foxr 225: $result .= "\n";
226:
1.73 foxr 227: } else {
228:
229:
230: $result.=&make_eps_image($bgimg,$parstack,$safeeval,-2);
231: }
1.57 albertel 232: }
233: }
234: return $result;
235: }
236: sub make_eps_image {
1.64 albertel 237: my ($bgimg,$parstack,$safeeval,$depth)=@_;
1.73 foxr 238: &Apache::lonxml::debug("image prior to get_eps_image: $bgimg");
1.64 albertel 239: my ($path,$file) = &Apache::londefdef::get_eps_image($bgimg);
1.73 foxr 240: &Apache::lonxml::debug("image after: $bgimg");
1.64 albertel 241: ($height_param,$width_param)=
242: &Apache::londefdef::image_size($bgimg,0.3,$parstack,$safeeval,
243: $depth,1);
1.73 foxr 244:
245: &Apache::lonxml::debug("Image size: $height_param x $width_param");
246:
1.64 albertel 247: my $dirtywidth=$width_param+5;
1.68 foxr 248: my $result ="\n".'\vspace*{2mm}\noindent'."\n".
249: '\parbox{'.$dirtywidth.
1.64 albertel 250: ' mm}{ \noindent \epsfxsize='.$width_param.
251: ' mm \epsffile{'.$path.$file.
1.68 foxr 252: '}\setlength{\unitlength}{1mm}'."\n".' \begin{picture}('.
253: $width_param.','.$height_param.')(0,-'.$height_param.')'."\n";
1.72 foxr 254: my $magick = Image::Magick->new;
255: $magick->Read($bgimg);
256: my $initial_width = $magick->Get('width');
1.73 foxr 257: &Apache::lonxml::debug("ImageMagick thinks width is; $initial_width");
1.72 foxr 258: $scale_factor = $width_param / $initial_width;
1.57 albertel 259: return $result;
260: }
261:
1.1 tsai 262: sub start_labelgroup {
1.47 albertel 263: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
264: my $result='';
265: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
266: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
267: $type =~tr/A-Z/a-z/;
1.48 albertel 268: if ($target ne 'modified' && ($name =~ /\W/ || $name =~ /^[0-9]/)) {
269: &Apache::lonxml::error("Only _ a-z A-Z and 0-9 are allowed in the name to a labelgroup, and the first character can not be a number.<br />");
270: }
1.47 albertel 271: if ($target eq 'web' || $target eq 'tex' ||
272: $target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
273: $Apache::randomlabel::groupname=$name;
274: $Apache::randomlabel::type=$type;
275: @Apache::randomlabel::xcoord = ();
276: @Apache::randomlabel::ycoord = ();
277: @Apache::randomlabel::value = ();
278: @Apache::randomlabel::label_arr = ();
1.68 foxr 279: @Apache::randomlabel::description = ();
1.47 albertel 280: } elsif ($target eq 'edit') {
281: $result.=&Apache::edit::tag_start($target,$token);
282: $result.=&Apache::edit::text_arg('Name:','name',$token).
1.63 albertel 283: &Apache::edit::select_arg('Type:','type',['text','image'],$token);
284: if (!defined($token->[2]{'TeXsize'})) {
285: $token->[2]{'TeXsize'}='\normalsize';
286: }
287: $result.=&Apache::edit::select_arg('TeX font size:','TeXsize',
288: ['\tiny','\scriptsize',
289: '\footnotesize','\small',
290: '\normalsize','\large','\Large',
291: '\LARGE','\huge','\Huge'],
292: $token);
293: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1.47 albertel 294: } elsif ($target eq 'modified') {
295: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.63 albertel 296: $safeeval,'name','type',
297: 'TeXsize');
1.47 albertel 298: if ($constructtag) {
299: $result = &Apache::edit::rebuild_tag($token);
300: $result.=&Apache::edit::handle_insert();
301: }
1.4 albertel 302: }
1.47 albertel 303: return $result;
1.1 tsai 304: }
305:
1.72 foxr 306: #
307: # Utility sub to compute the width of a label.
308: #
309: sub get_label_width {
310: my $label = shift;
311: &Apache::lonxml::debug("image label = $label");
312: if (-e $label) {
313: &Apache::lonxml::debug("$label exists");
314: } else {
315: &Apache::lonxml::debug("$label does not exist");
316: }
317: my $magick = Image::Magick->new;
318: $magick->Read($label);
319: my $pixel_width = $magick->Get('width');
320: return $pixel_width * $scale_factor;
321:
322:
323: }
1.5 albertel 324: sub add_vars {
1.47 albertel 325: my ($name,$order,$label,$labelorder,$value,$image,$safeeval) = @_;
1.61 albertel 326: if (!defined($name) || $name eq '') { return; }
1.47 albertel 327: my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
328: my $out=Apache::run::run($code,$safeeval);
329: if ($value) {
330: $code = '${'.$name."}{'value_".($order+1)."'}='".$value."';";
331: $out=Apache::run::run($code,$safeeval);
332: $code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';";
333: $out=Apache::run::run($code,$safeeval);
334: }
335: if ($image) {
336: my $code = '${'.$name."}{'image_".($order+1)."'}='".$image."';";
337: my $out=Apache::run::run($code,$safeeval);
338: }
339: $code = '${'.$name."}{'numlocations'}='".($order+1)."';";
1.5 albertel 340: $out=Apache::run::run($code,$safeeval);
1.4 albertel 341: }
1.5 albertel 342:
1.1 tsai 343: # begin to assign labels to locations
344: sub end_labelgroup {
1.47 albertel 345: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
346: my $gname = $Apache::randomlabel::groupname;
347: my $type = $Apache::randomlabel::type;
348: my $result='';
349: if ($target eq 'web' || $target eq 'answer' || $target eq 'grade' ||
350: $target eq 'analyze') {
351: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
352: &Apache::structuretags::shuffle(\@idx_arr);
353: for(0 .. $#Apache::randomlabel::label_arr) {
354: my $str;
355: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
356: my $x = $Apache::randomlabel::xcoord[$_];
357: my $y = $Apache::randomlabel::ycoord[$_];
358: my $value = $Apache::randomlabel::value[$_];
1.59 albertel 359: my $i=$Apache::randomlabel::obj_cnt++;
1.47 albertel 360: if( $type eq 'text') {
361: &add_vars($gname,$_,$label,$idx_arr[$_],$value,'',$safeeval);
1.59 albertel 362: $str = join(':',$x,$y,&Apache::lonnet::escape($label));
363: $args{"cgi.$cgi_id.OBJTYPE"}.='LABEL:';
1.47 albertel 364: } elsif ( $type eq 'image') {
365: &add_vars($gname,$_,
366: $Apache::randomlabel::description[$idx_arr[$_]],
367: $idx_arr[$_],$value,$label,$safeeval);
1.59 albertel 368: $str = join(':',$x,$y,&Apache::lonnet::escape($label));
369: $args{"cgi.$cgi_id.OBJTYPE"}.='IMAGE:';
1.47 albertel 370: } else {
371: &Apache::lonxml::error('Unknown type of label :'.$type.':');
372: }
1.59 albertel 373: if ($target eq 'web') { $args{"cgi.$cgi_id.OBJ$i"} =$str; }
1.47 albertel 374: }
375: } elsif ($target eq 'tex') {
376: my $WX1=0; # Web x-coord. of upper left corner (ULC)
377: my $WY1=0; # Web y-coord. of (ULC)
378: my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
379: my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
1.63 albertel 380: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
381: if (!defined($TeXsize)) { $TeXsize='\\normalsize'; }
1.62 albertel 382:
1.47 albertel 383: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
384: &Apache::structuretags::shuffle(\@idx_arr);
385:
386: &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
387: for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
388: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
389: my $x = $Apache::randomlabel::xcoord[$i];
1.62 albertel 390: # FIXME the 3.5 here is the 'height' of the letter in TeX
391: my $y = $Apache::randomlabel::ycoord[$i]-3.5;
1.47 albertel 392: my $value = $Apache::randomlabel::value[$i];
393: #x latex coordinate
1.64 albertel 394: my $tcX=($x)*($width_param/$wwidth);
1.47 albertel 395: #y latex coordinate
396: # my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 );
1.64 albertel 397: my $tcY=$height_param-$y*($height_param/$wheight);
1.47 albertel 398: $tcX=sprintf('%.2f',$tcX);
399: $tcY=sprintf('%.2f',$tcY);
1.70 foxr 400: $result .= '\put('.$tcX.','.$tcY.'){';
1.47 albertel 401: if( $type eq 'text') {
1.70 foxr 402: $result.= $TeXsize.' \bf '.$label."}\n";
1.47 albertel 403: &add_vars($gname,$i,$label,$idx_arr[$i],$value,'',$safeeval);
404: } elsif ( $type eq 'image') {
1.71 foxr 405: my ($path,$file) = &Apache::londefdef::get_eps_image($label);
406: my $image_name = $path.$file;
1.72 foxr 407: my $label_width = get_label_width($label);
408:
409: $result .= '\includegraphics[width='.$label_width.'mm]{'
1.71 foxr 410: .$image_name."}}\n";
1.47 albertel 411: &add_vars($gname,$i,
412: $Apache::randomlabel::description[$idx_arr[$i]],
413: $idx_arr[$i],$value,$label,$safeeval);
414: } else {
415: &Apache::lonxml::error('Unknown type of label :'.$type.':');
416: }
417: }
418: } elsif ($target eq 'edit') {
419: $result.=&Apache::edit::end_table;
1.3 tsai 420: }
1.47 albertel 421: return $result;
1.1 tsai 422: }
423:
1.5 albertel 424: # <location x="123" y="456" value="some value"/>
1.1 tsai 425: sub start_location {
1.47 albertel 426: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
427: my $x= &check_int(&Apache::lonxml::get_param('x',$parstack,$safeeval),50);
428: my $y= &check_int(&Apache::lonxml::get_param('y',$parstack,$safeeval),50);
1.75 foxr 429: &Apache::lonxml::debug("x = $x y = $y");
430: $x = $x*$label_xscale;
431: $y = $y*$label_yscale;
432: &Apache::lonxml::debug(" H = $height_param W = $width_param");
433: &Apache::lonxml::debug(" XS = $label_xscale YS = $label_yscale");
434: &Apache::lonxml::debug(" X = $x Y = $y");
1.47 albertel 435: my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
436: my $result='';
437: push(@Apache::randomlabel::xcoord,$x);
438: push(@Apache::randomlabel::ycoord,$y);
439: push(@Apache::randomlabel::value,$value);
440: if ($target eq 'edit') {
441: $result.=&Apache::edit::tag_start($target,$token);
442: $result.=&Apache::edit::text_arg('X:','x',$token,4).
443: &Apache::edit::text_arg('Y:','y',$token,4).
444: &Apache::edit::entercoords('x','y','attribute','width','height').' '.
445: &Apache::edit::text_arg('Value:','value',$token).
446: &Apache::edit::end_row();
447: $result.=&Apache::edit::end_table;
448: } elsif ($target eq 'modified') {
449: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
450: $safeeval,'x','y','value');
451: if ($constructtag) {
452: $result = &Apache::edit::rebuild_tag($token);
453: $result.=&Apache::edit::handle_insert();
454: }
1.4 albertel 455: }
1.47 albertel 456: return $result;
1.1 tsai 457: }
458:
459: sub end_location {
1.47 albertel 460: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
461: my @result;
462: if ($target eq 'edit') { @result=('','no') }
463: return @result;
1.1 tsai 464: }
465:
1.2 tsai 466: # <label>$var_abc</label>
1.1 tsai 467: sub start_label {
1.47 albertel 468: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
469: my $result='';
470: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
471: if ($target eq 'web' || $target eq 'tex' ||
472: $target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
1.57 albertel 473: &Apache::lonxml::startredirection;
1.47 albertel 474: } elsif ($target eq 'edit') {
475: $result.=&Apache::edit::tag_start($target,$token,"$type Label");
476: my $text=&Apache::lonxml::get_all_text("/label",$parser);
477: if ($type eq 'image') {
478: $result.=&Apache::edit::end_row().
479: &Apache::edit::start_spanning_row();
480: $result.=&Apache::edit::text_arg('Description:','description',
481: $token);
482: }
483: if ($type eq 'text') { $result.="Label Text:"; }
484: if ($type eq 'image') { $result.="Path to image: "; }
485: $result.=&Apache::edit::editline('',$text,'',50).
486: &Apache::edit::end_table();
487: } elsif ($target eq 'modified') {
488: $result = '<label>';
489: if ($type eq 'image') {
490: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
491: $safeeval,
492: 'description');
493: if ($constructtag) {
494: $result = &Apache::edit::rebuild_tag($token);
495: } else {
496: $result = $token->[4];
497: }
498: }
1.52 albertel 499: $result.=&Apache::edit::modifiedfield("/label",$parser);
1.26 albertel 500: }
1.47 albertel 501: return $result;
1.1 tsai 502: }
503:
504: sub end_label {
1.47 albertel 505: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
506: my @result;
1.57 albertel 507: if ($target eq 'edit') {
508: @result=('','no') ;
509: } elsif ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
510: $target eq 'answer' || $target eq 'analyze') {
511: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
512: my $ltext=&Apache::lonxml::endredirection;
513: if ($type eq 'image') {
1.70 foxr 514: if ($target eq 'tex') {
515: # For tex targets, our image url has been potentially corrupted
516: # by prepending \'s in front of special latex symbols.
517: # For now we only worry about the _ case (most common?)
518: # There's a whole host of theim in lonxml::latex_special_symbols
519: # that could potentially have to be re-done.
520:
521: $ltext =~ s/\\_/_/g;
522: }
1.57 albertel 523: &Apache::lonxml::debug("Turning $ltext, $Apache::lonxml::pwd[-1]");
524: $ltext=&Apache::imageresponse::clean_up_image($ltext);
525: # $ltext=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],
526: # $ltext);
527: &Apache::lonxml::debug("into $ltext");
528: my $description = &Apache::lonxml::get_param('description',
529: $parstack,$safeeval);
530: push(@Apache::randomlabel::description,$description);
1.61 albertel 531: } else {
532: $ltext=~s/[\r\n]*//gs
1.57 albertel 533: }
534: push(@Apache::randomlabel::label_arr,$ltext);
535: }
1.47 albertel 536: return @result;
1.1 tsai 537: }
538:
539: 1;
540: __END__
541:
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