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