1: # The LearningOnline Network with CAPA
2: # random labelling tool
3: #
4: # $Id: randomlabel.pm,v 1.40 2002/11/08 14:41:53 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: # 7/20/2001 Isaac Tsai, initial syntax
29: # 8/10/2001 Isaac Tsai,
30: # 8/30/2001 Isaac Tsai,
31: # SYNTAX:
32: # <randomlabel bgimg="URL" width="12" height="45" texwidth="50">
33: # <labelgroup name="GroupOne" type="image">
34: # <location x="123" y="456" />
35: # <location x="321" y="654" />
36: # <location x="213" y="546" />
37: # <label description="TEXT-1">IMG-URL</label>
38: # <label description="TEXT-2">IMG-URL</label>
39: # <label description="TEXT-3">IMG-URL</label>
40: # </labelgroup>
41: # <labelgroup name="GroupTwo" type="text">
42: # <location x="12" y="45" />
43: # <location x="32" y="65" />
44: # <location x="21" y="54" />
45: # <label>TEXT-1</label>
46: # <label>TEXT-2</label>
47: # <label>TEXT-3</label>
48: # </labelgroup>
49: # </randomlabel>
50: # ===========================================
51: # side effect:
52: # location (123,456): $GroupOne[0] = 2 # images give out indexes
53: # (321,654): $GroupOne[1] = 1
54: # (213,546): $GroupOne[2] = 0
55: # location (12,45) : $GroupTwo[0] = "TEXT-3"
56: # (32,65) : $GroupTwo[1] = "TEXT-1"
57: # (21,54) : $GroupTwo[2] = "TEXT-2"
58: # ===========================================
59: package Apache::randomlabel;
60: use Apache::lonnet;
61: use strict;
62: use Apache::edit;
63: use Apache::File();
64: use Apache::Constants qw(:common :http);
65:
66: BEGIN {
67: &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label'));
68: }
69:
70: sub check_int {
71: # utility function to do error checking on a integer.
72: my ($num,$default) = @_;
73: $default = 100 if (! defined($default));
74: $num =~ s/\s+//g; # We dont need no stinkin white space!
75: # If it is a real, just grab the integer part.
76: ($num,undef) = split (/\./,$num) if ($num =~ /\./);
77: # set to default if what we have left doesn't match anything...
78: $num = $default unless ($num =~/^\d+$/);
79: return $num;
80: }
81:
82: sub start_randomlabel {
83: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
84: my $result='';
85: push (@Apache::lonxml::namespace,'randomlabel');
86: my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
87: if ( $bgimg !~ /^http:/ ) {
88: $bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);
89: }
90: my $w= &check_int(&Apache::lonxml::get_param('width',$parstack,$safeeval));
91: my $h= &check_int(&Apache::lonxml::get_param('height',$parstack,$safeeval));
92: my $texwidth= &Apache::lonxml::get_param('texwidth',$parstack,$safeeval);
93: $Apache::randomlabel::tlabel_cnt=0;
94: $Apache::randomlabel::ilabel_cnt=0;
95: if ($target eq 'web') {
96: &Apache::lonxml::startredirection();
97: $result.="BGIMG=".&Apache::lonnet::escape($bgimg);
98: } elsif ($target eq 'tex') {
99: my $newbgimg = $bgimg;
100: $bgimg=~s/(.gif|.jpg)$/.eps/;
101: $bgimg= &Apache::lonnet::filelocation($bgimg);
102: if (not $ENV{'request.role'}=~/^au\./) {
103: $bgimg=~s/http:\/[^\/]*/\/home\/httpd\/html/;
104: $bgimg=~s/\/$//;
105: #if no eps file try to replicate it
106: if (not-e $bgimg) {
107: if (&Apache::lonnet::repcopy($bgimg) ne OK ) {
108: #if replication failed try to find ps file
109: $bgimg=~s/\.eps$/\.ps/;
110: #if no ps file try to replicate it
111: if (not-e $bgimg &&
112: &Apache::lonnet::repcopy($bgimg) ne OK) {
113: #if replication failed try to produce eps file dynamically
114: $bgimg=~s/\.ps$/\.eps/;
115: my $temp_file;
116: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.dat";
117: $temp_file = Apache::File->new('>>'.$filename);
118: $newbgimg =~ s/(.*)\/res\//\/home\/httpd\/html\/res\//;
119: print $temp_file "$newbgimg\n";
120: $bgimg =~ m/\/([^\/]+)$/;
121: $bgimg = '/home/httpd/prtspool/'.$1;
122: }
123: }
124: }
125: } else {
126: $bgimg=~s/http:\/[^\/]*\/~([^\/]+)/\/home\/$1\/public_html/;
127: }
128: $bgimg=~s/\/$//;
129: my $dirtywidth=$texwidth+5;
130: if ($texwidth==90) {
131: $result.='\vspace*{2mm}\noindent \parbox{'.$dirtywidth.' mm}{ \noindent \epsfxsize='.$texwidth.' mm \epsffile{'.
132: $bgimg.'}\setlength{\unitlength}{1mm} \begin{picture}('.$texwidth.','.$texwidth*$h/$w.')(0,-'.$texwidth*$h/$w.')';
133: } else {
134: $result.='\vspace*{2mm}\noindent \parbox{'.$dirtywidth.' mm}{ \noindent \epsfxsize='.$texwidth.' mm \epsffile{'.
135: $bgimg.'}\setlength{\unitlength}{1mm} \begin{picture}('.$texwidth.','.$texwidth*$h/$w.')(0,-'.$texwidth*$h/$w.')';
136: }
137: } elsif ($target eq 'edit') {
138: $result.=&Apache::edit::tag_start($target,$token);
139: $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).' ';
140: $result.=&Apache::edit::browse('bgimg').' ';
141: $result.=&Apache::edit::search('bgimg').'<br />'.
142: &Apache::edit::text_arg('Width(pixel):' ,'width' ,$token,6).
143: &Apache::edit::text_arg('Height(pixel):','height' ,$token,6).
144: &Apache::edit::text_arg('TeXWidth(mm):' ,'texwidth',$token,6).
145: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
146: } elsif ($target eq 'modified') {
147: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
148: 'bgimg','width','height',
149: 'texwidth');
150: if ($constructtag) {
151: $result = &Apache::edit::rebuild_tag($token);
152: $result.=&Apache::edit::handle_insert();
153: }
154: }
155: return $result;
156: }
157:
158: sub end_randomlabel {
159: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
160: my $result='';
161: my $count;
162: pop @Apache::lonxml::namespace;
163: if ($target eq 'web') {
164: my $args=&Apache::lonxml::endredirection();
165: $args=~s/\s*&/&/g;
166: $args=~s/\s*$//;
167: $count = $Apache::randomlabel::tlabel_cnt;
168: if( $count != 0) { $args.= "&COUNT=$count"; }
169: $count = $Apache::randomlabel::ilabel_cnt;
170: if( $count != 0) { $args.= "&ICOUNT=$count"; }
171: my $token=$Apache::lonxml::curdepth.'_'.$$;
172: $result.='<img src="/adm/randomlabel.png?token='.$token;
173: $result.='" /><br />'."\n";
174: &Apache::lonnet::appenv(("imagerequest.$token"=>&Apache::lonnet::escape($args)));
175: } elsif ($target eq 'tex') {
176: $result='\end{picture}\\\\';
177: @$parstack[-1]=~/\$height\s*=\s*?"(.+)?"/;
178: my $one=$1;
179: @$parstack[-1]=~/\$width\s*=\s*?"(.+)?"/;
180: my $two=$1;
181: @$parstack[-1]=~/\$texwidth\s*=\s*?"(.+)?"/;
182: my $three=$1;
183: my $howtoskipback = $three*$one/$two;
184: $result.=' \vskip -'.$howtoskipback.' mm }';
185: } elsif ($target eq 'edit') {
186: $result.=&Apache::edit::end_table;
187: }
188: return $result;
189: }
190:
191: sub start_labelgroup {
192: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
193: my $result='';
194: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
195: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
196: $type =~tr/A-Z/a-z/;
197: if ($target eq 'web' || $target eq 'tex' ||
198: $target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
199: $Apache::randomlabel::groupname=$name;
200: $Apache::randomlabel::type=$type;
201: @Apache::randomlabel::xcoord = ();
202: @Apache::randomlabel::ycoord = ();
203: @Apache::randomlabel::value = ();
204: @Apache::randomlabel::label_arr = ();
205: @Apache::randomlabel::decription = ();
206: } elsif ($target eq 'edit') {
207: $result.=&Apache::edit::tag_start($target,$token);
208: $result.=&Apache::edit::text_arg('Name:','name',$token).
209: &Apache::edit::select_arg('Type:','type',['text','image'],$token).
210: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
211: } elsif ($target eq 'modified') {
212: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
213: 'name','type');
214: if ($constructtag) {
215: $result = &Apache::edit::rebuild_tag($token);
216: $result.=&Apache::edit::handle_insert();
217: }
218: }
219: return $result;
220: }
221:
222: sub add_vars {
223: my ($name,$order,$label,$labelorder,$value,$image,$safeeval) = @_;
224: my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
225: my $out=Apache::run::run($code,$safeeval);
226: if ($value) {
227: $code = '${'.$name."}{'value_".($order+1)."'}='".$value."';";
228: $out=Apache::run::run($code,$safeeval);
229: $code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';";
230: $out=Apache::run::run($code,$safeeval);
231: }
232: if ($image) {
233: my $code = '${'.$name."}{'image_".($order+1)."'}='".$image."';";
234: my $out=Apache::run::run($code,$safeeval);
235: }
236: $code = '${'.$name."}{'numlocations'}='".($order+1)."';";
237: $out=Apache::run::run($code,$safeeval);
238: }
239:
240: # begin to assign labels to locations
241: sub end_labelgroup {
242: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
243: my $gname = $Apache::randomlabel::groupname;
244: my $type = $Apache::randomlabel::type;
245: my $result='';
246: if ($target eq 'web' || $target eq 'answer' || $target eq 'grade' ||
247: $target eq 'analyze') {
248: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
249: &Apache::structuretags::shuffle(\@idx_arr);
250: for(0 .. $#Apache::randomlabel::label_arr) {
251: my $str;
252: my $xstr;
253: my $ystr;
254: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
255: my $x = $Apache::randomlabel::xcoord[$_];
256: my $y = $Apache::randomlabel::ycoord[$_];
257: my $value = $Apache::randomlabel::value[$_];
258: if( $type eq 'text') {
259: &add_vars($gname,$_,$label,$idx_arr[$_],$value,'',$safeeval);
260: $str = 'LB'.$Apache::randomlabel::tlabel_cnt;
261: $xstr = 'X'.$Apache::randomlabel::tlabel_cnt;
262: $ystr = 'Y'.$Apache::randomlabel::tlabel_cnt;
263: $Apache::randomlabel::tlabel_cnt += 1;
264: } elsif ( $type eq 'image') {
265: &add_vars($gname,$_,
266: $Apache::randomlabel::description[$idx_arr[$_]],
267: $idx_arr[$_],$value,$label,$safeeval);
268: $str = 'IMG'.$Apache::randomlabel::ilabel_cnt;
269: $xstr = 'IX'.$Apache::randomlabel::ilabel_cnt;
270: $ystr = 'IY'.$Apache::randomlabel::ilabel_cnt;
271: $Apache::randomlabel::ilabel_cnt += 1;
272: } else {
273: &Apache::lonxml::error('Unknown type of label :'.$type.':');
274: }
275: if ($target eq 'web') {
276: $result .= '&'. $str .'='.&Apache::lonnet::escape($label);
277: $result .= '&'. $xstr .'='.$x;
278: $result .= '&'. $ystr .'='.$y;
279: }
280: }
281: } elsif ($target eq 'tex') {
282: my $WX1=0; # Web x-coord. of upper left corner (ULC)
283: my $WY1=0; # Web y-coord. of (ULC)
284: my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
285: my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
286: my $texwidth=&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,-2);
287: my $TX1=0;
288: my $TY1=$texwidth*($wheight/$wwidth);
289: my $TX2=$texwidth;
290: my $TY2=0;
291:
292:
293: my $slopex=($wwidth-$WX1)/($TX2-$TX1);
294: my $slopey=($wheight-$WY1)/($TY2-($TY1-1.0));
295: my $cstx=$wwidth-$slopex*($TX2);
296: my $csty=$wheight-$slopey*($TY2);
297:
298: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
299: &Apache::structuretags::shuffle(\@idx_arr);
300:
301: &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
302: for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
303: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
304: my $x = $Apache::randomlabel::xcoord[$i];
305: my $y = $Apache::randomlabel::ycoord[$i];
306: my $value = $Apache::randomlabel::value[$i];
307: #x latex coordinate
308: my $tcX=($x)*($texwidth/$wwidth);
309: #y latex coordinate
310: # my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 );
311: my $tcY=$TY1-$y*($TY1/$wheight);
312: $tcX=sprintf('%.2f',$tcX);
313: $tcY=sprintf('%.2f',$tcY);
314: $result.='\put('.$tcX.','.$tcY.'){\normalsize \bf '.$label.'}'."\n";
315: if( $type eq 'text') {
316: &add_vars($gname,$i,$label,$idx_arr[$i],$value,'',$safeeval);
317: } elsif ( $type eq 'image') {
318: &add_vars($gname,$i,
319: $Apache::randomlabel::description[$idx_arr[$i]],
320: $idx_arr[$i],$value,$label,$safeeval);
321: } else {
322: &Apache::lonxml::error('Unknown type of label :'.$type.':');
323: }
324: }
325: } elsif ($target eq 'edit') {
326: $result.=&Apache::edit::end_table;
327: }
328: return $result;
329: }
330:
331: # <location x="123" y="456" value="some value"/>
332: sub start_location {
333: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
334: my $x= &check_int(&Apache::lonxml::get_param('x',$parstack,$safeeval),50);
335: my $y= &check_int(&Apache::lonxml::get_param('y',$parstack,$safeeval),50);
336: my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
337: my $result='';
338: push(@Apache::randomlabel::xcoord,$x);
339: push(@Apache::randomlabel::ycoord,$y);
340: push(@Apache::randomlabel::value,$value);
341: if ($target eq 'edit') {
342: $result.=&Apache::edit::tag_start($target,$token);
343: $result.=&Apache::edit::text_arg('X:','x',$token,4).
344: &Apache::edit::text_arg('Y:','y',$token,4).
345: &Apache::edit::text_arg('Value:','value',$token).
346: &Apache::edit::end_row();
347: $result.=&Apache::edit::end_table;
348: } elsif ($target eq 'modified') {
349: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
350: 'x','y','value');
351: if ($constructtag) {
352: $result = &Apache::edit::rebuild_tag($token);
353: $result.=&Apache::edit::handle_insert();
354: }
355: }
356: return $result;
357: }
358:
359: sub end_location {
360: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
361: my @result;
362: if ($target eq 'edit') { @result=('','no') }
363: return @result;
364: }
365:
366: # <label>$var_abc</label>
367: sub start_label {
368: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
369: my $result='';
370: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
371: if ($target eq 'web' || $target eq 'tex' ||
372: $target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
373: my $ltext=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
374: $ltext=&Apache::run::evaluate($ltext,$safeeval,$$parstack[-1]);
375: if ($type eq 'image') {
376: &Apache::lonxml::debug("Turning $ltext and $Apache::lonxml::pwd[-1]");
377: $ltext=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],
378: $ltext);
379: &Apache::lonxml::debug("into $ltext");
380: my $description = &Apache::lonxml::get_param('description',
381: $parstack,$safeeval);
382: push(@Apache::randomlabel::description,$description);
383: }
384: push(@Apache::randomlabel::label_arr,$ltext);
385: } elsif ($target eq 'edit') {
386: $result.=&Apache::edit::tag_start($target,$token,"$type Label");
387: my $text=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
388: if ($type eq 'image') {
389: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
390: $result.=&Apache::edit::text_arg('Description:','description',$token);
391: }
392: if ($type eq 'text') { $result.="Label Text:"; }
393: if ($type eq 'image') { $result.="Path to image: "; }
394: $result.=&Apache::edit::editline('',$text,'',50).
395: &Apache::edit::end_table();
396: } elsif ($target eq 'modified') {
397: my $text=$$parser[-1]->get_text("/label");
398: $result = '<label>';
399: if ($type eq 'image') {
400: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
401: 'description');
402: if ($constructtag) {
403: $result = &Apache::edit::rebuild_tag($token);
404: } else {
405: $result = $token->[4];
406: }
407: }
408: $result.=&Apache::edit::modifiedfield($token);
409: }
410: return $result;
411: }
412:
413: sub end_label {
414: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
415: my @result;
416: if ($target eq 'edit') { @result=('','no') }
417: return @result;
418: }
419:
420:
421:
422: 1;
423: __END__
424:
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