1: # The LearningOnline Network with CAPA
2: # random labelling tool
3: #
4: # $Id: randomlabel.pm,v 1.34 2002/08/07 21:49:35 sakharuk 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) : $GroupTwo[2] = "TEXT-2"
58: # ===========================================
59: package Apache::randomlabel;
60: use Apache::lonnet;
61: use strict;
62: use Apache::edit;
63:
64: BEGIN {
65: &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label'));
66: }
67:
68: sub check_int {
69: # utility function to do error checking on a integer.
70: my ($num,$default) = @_;
71: $default = 100 if (! defined($default));
72: $num =~ s/\s+//g; # We dont need no stinkin white space!
73: # If it is a real, just grab the integer part.
74: ($num,undef) = split (/\./,$num) if ($num =~ /\./);
75: # set to default if what we have left doesn't match anything...
76: $num = $default unless ($num =~/^\d+$/);
77: return $num;
78: }
79:
80: sub start_randomlabel {
81: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
82: my $result='';
83: push (@Apache::lonxml::extlinks, '/res/adm/includes/GLabel.class');
84: push (@Apache::lonxml::namespace,'randomlabel');
85: my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
86: if ( $bgimg !~ /^http:/ ) {
87: push (@Apache::lonxml::extlinks,$bgimg);
88: $bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);
89: if ($bgimg =~ /$Apache::lonnet::perlvar{'lonDocRoot'}/) {
90: $bgimg=~s/$Apache::lonnet::perlvar{'lonDocRoot'}//;
91: } elsif ($bgimg =~ m:^/home/.*/public_html:) {
92: $bgimg =~ s:^/home/(.*)/public_html:/~$1:;
93: }
94: $bgimg='http://'.$ENV{'SERVER_NAME'}.$bgimg;
95: }
96: my $code = &Apache::lonxml::get_param('code',$parstack,$safeeval);
97: my $codebase = &Apache::lonxml::get_param('codebase',$parstack,$safeeval);
98: my $w= &check_int(&Apache::lonxml::get_param('width',$parstack,$safeeval));
99: my $h= &check_int(&Apache::lonxml::get_param('height',$parstack,$safeeval));
100: my $texwidth= &Apache::lonxml::get_param('texwidth',$parstack,$safeeval);
101: if (!$code) { $code='GLabel.class'; }
102: if (!$codebase) { $codebase='/res/adm/includes/'; }
103: $Apache::randomlabel::tlabel_cnt=0;
104: $Apache::randomlabel::ilabel_cnt=0;
105: if ($target eq 'web') {
106: $result.="<applet code=\"$code\" codebase=\"$codebase\" width=\"$w\" height=\"$h\">\n";
107: $result.="<param name=\"bgimg\" value=\"$bgimg\">\n";
108: } elsif ($target eq 'tex') {
109: $bgimg=~s/(.gif|.jpg)$/.eps/;
110: $bgimg= &Apache::lonnet::filelocation($bgimg);
111: if (not $ENV{'request.role'}=~/^au\./) {
112: $bgimg=~s/http:\/[^\/]*/\/home\/httpd\/html/;
113: } else {
114: $bgimg=~s/http:\/[^\/]*\/~([^\/]+)/\/home\/$1\/public_html/;
115:
116: }
117: $bgimg=~s/\/$//;
118: my $dirtywidth=$texwidth+5;
119: if ($texwidth==90) {
120: $result.='\vspace*{2mm}\noindent \parbox{'.$dirtywidth.' mm}{ \noindent \epsfxsize='.$texwidth.' mm \epsffile{'.
121: $bgimg.'}\setlength{\unitlength}{1mm} \begin{picture}('.$texwidth.','.$texwidth*$h/$w.')(0,-'.$texwidth*$h/$w.')';
122: } else {
123: $result.='\vspace*{2mm}\noindent \parbox{'.$dirtywidth.' mm}{ \noindent \epsfxsize='.$texwidth.' mm \epsffile{'.
124: $bgimg.'}\setlength{\unitlength}{1mm} \begin{picture}('.$texwidth.','.$texwidth*$h/$w.')(0,-'.$texwidth*$h/$w.')';
125: }
126: } elsif ($target eq 'edit') {
127: $result.=&Apache::edit::tag_start($target,$token);
128: $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).' ';
129: $result.=&Apache::edit::browse('bgimg').' ';
130: $result.=&Apache::edit::search('bgimg').'<br />'.
131: &Apache::edit::text_arg('Width(pixel):' ,'width' ,$token,6).
132: &Apache::edit::text_arg('Height(pixel):','height' ,$token,6).
133: &Apache::edit::text_arg('TeXWidth(mm):' ,'texwidth',$token,6).
134: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
135: } elsif ($target eq 'modified') {
136: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
137: 'bgimg','width','height',
138: 'texwidth');
139: if ($constructtag) {
140: $result = &Apache::edit::rebuild_tag($token);
141: $result.=&Apache::edit::handle_insert();
142: }
143: }
144: return $result;
145: }
146:
147: sub end_randomlabel {
148: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
149: my $result='';
150: my $count;
151: pop @Apache::lonxml::namespace;
152: if ($target eq 'web') {
153: $count = $Apache::randomlabel::tlabel_cnt;
154: if( $count != 0) { $result.= "<param name=\"COUNT\" value=\"$count\">\n"; }
155: $count = $Apache::randomlabel::ilabel_cnt;
156: if( $count != 0) { $result.= "<param name=\"ICOUNT\" value=\"$count\">\n"; }
157: $result .= "</applet>\n<BR />";
158: } elsif ($target eq 'tex') {
159: $result='\end{picture}\\\\}';
160: @$parstack[-1]=~/\$height\s*=\s*?"(.+)?"/;
161: my $one=$1;
162: @$parstack[-1]=~/\$width\s*=\s*?"(.+)?"/;
163: my $two=$1;
164: @$parstack[-1]=~/\$texwidth\s*=\s*?"(.+)?"/;
165: my $three=$1;
166: my $howtoskipback = $three*$one/$two;
167: $result.=' \vskip -'.$howtoskipback.' mm ';
168: } elsif ($target eq 'edit') {
169: $result.=&Apache::edit::end_table;
170: }
171: return $result;
172: }
173:
174: sub start_labelgroup {
175: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
176: my $result='';
177: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
178: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
179: $type =~tr/A-Z/a-z/;
180: if ($target eq 'web' || $target eq 'tex' ||
181: $target eq 'grade' || $target eq 'answer') {
182: $Apache::randomlabel::groupname=$name;
183: $Apache::randomlabel::type=$type;
184: @Apache::randomlabel::xcoord = ();
185: @Apache::randomlabel::ycoord = ();
186: @Apache::randomlabel::value = ();
187: @Apache::randomlabel::label_arr = ();
188: @Apache::randomlabel::decription = ();
189: } elsif ($target eq 'edit') {
190: $result.=&Apache::edit::tag_start($target,$token);
191: $result.=&Apache::edit::text_arg('Name:','name',$token).
192: &Apache::edit::select_arg('Type:','type',['text','image'],$token).
193: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
194: } elsif ($target eq 'modified') {
195: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
196: 'name','type');
197: if ($constructtag) {
198: $result = &Apache::edit::rebuild_tag($token);
199: $result.=&Apache::edit::handle_insert();
200: }
201: }
202: return $result;
203: }
204:
205: sub add_vars {
206: my ($name,$order,$label,$labelorder,$value,$image,$safeeval) = @_;
207: my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
208: my $out=Apache::run::run($code,$safeeval);
209: if ($value) {
210: $code = '${'.$name."}{'value_".($order+1)."'}='".$value."';";
211: $out=Apache::run::run($code,$safeeval);
212: $code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';";
213: $out=Apache::run::run($code,$safeeval);
214: }
215: if ($image) {
216: my $code = '${'.$name."}{'image_".($order+1)."'}='".$image."';";
217: my $out=Apache::run::run($code,$safeeval);
218: }
219: $code = '${'.$name."}{'numlocations'}='".($order+1)."';";
220: $out=Apache::run::run($code,$safeeval);
221: }
222:
223: # begin to assign labels to locations
224: sub end_labelgroup {
225: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
226: my $gname = $Apache::randomlabel::groupname;
227: my $type = $Apache::randomlabel::type;
228: my $result='';
229: if ($target eq 'web' || $target eq 'answer' || $target eq 'grade') {
230: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
231: &Apache::structuretags::shuffle(\@idx_arr);
232: for(0 .. $#Apache::randomlabel::label_arr) {
233: my $str;
234: my $xstr;
235: my $ystr;
236: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
237: my $x = $Apache::randomlabel::xcoord[$_];
238: my $y = $Apache::randomlabel::ycoord[$_];
239: my $value = $Apache::randomlabel::value[$_];
240: if( $type eq 'text') {
241: &add_vars($gname,$_,$label,$idx_arr[$_],$value,'',$safeeval);
242: $str = 'LB'.$Apache::randomlabel::tlabel_cnt;
243: $xstr = 'X'.$Apache::randomlabel::tlabel_cnt;
244: $ystr = 'Y'.$Apache::randomlabel::tlabel_cnt;
245: $Apache::randomlabel::tlabel_cnt += 1;
246: } elsif ( $type eq 'image') {
247: &add_vars($gname,$_,
248: $Apache::randomlabel::description[$idx_arr[$_]],
249: $idx_arr[$_],$value,$label,$safeeval);
250: $str = 'IMG'.$Apache::randomlabel::ilabel_cnt;
251: $xstr = 'IX'.$Apache::randomlabel::ilabel_cnt;
252: $ystr = 'IY'.$Apache::randomlabel::ilabel_cnt;
253: $Apache::randomlabel::ilabel_cnt += 1;
254: } else {
255: &Apache::lonxml::error('Unknown type of label :'.$type.':');
256: }
257: if ($target eq 'web') {
258: $result .= '<param name="' . $str . '" value="'.$label.'">';
259: $result .= '<param name="' . $xstr . '" value="'.$x.'">';
260: $result .= '<param name="' . $ystr . '" value="'.$y.'">'."\n";
261: }
262: }
263: } elsif ($target eq 'tex') {
264: my $WX1=0; # Web x-coord. of upper left corner (ULC)
265: my $WY1=0; # Web y-coord. of (ULC)
266: my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
267: my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
268: my $texwidth=&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,-2);
269: my $TX1=0;
270: my $TY1=$texwidth*($wheight/$wwidth);
271: my $TX2=$texwidth;
272: my $TY2=0;
273:
274:
275: my $slopex=($wwidth-$WX1)/($TX2-$TX1);
276: my $slopey=($wheight-$WY1)/($TY2-($TY1-1.0));
277: my $cstx=$wwidth-$slopex*($TX2);
278: my $csty=$wheight-$slopey*($TY2);
279:
280: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
281: &Apache::structuretags::shuffle(\@idx_arr);
282:
283: &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
284: for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
285: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
286: my $x = $Apache::randomlabel::xcoord[$i];
287: my $y = $Apache::randomlabel::ycoord[$i];
288: my $value = $Apache::randomlabel::value[$i];
289: #x latex coordinate
290: my $tcX=($x)*($texwidth/$wwidth);
291: #y latex coordinate
292: # my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 );
293: my $tcY=$TY1-$y*($TY1/$wheight);
294: $tcX=sprintf('%.2f',$tcX);
295: $tcY=sprintf('%.2f',$tcY);
296: $result.='\put('.$tcX.','.$tcY.'){\normalsize \bf '.$label.'}'."\n";
297: if( $type eq 'text') {
298: &add_vars($gname,$i,$label,$idx_arr[$i],$value,'',$safeeval);
299: } elsif ( $type eq 'image') {
300: &add_vars($gname,$i,
301: $Apache::randomlabel::description[$idx_arr[$i]],
302: $idx_arr[$i],$value,$label,$safeeval);
303: } else {
304: &Apache::lonxml::error('Unknown type of label :'.$type.':');
305: }
306: }
307: } elsif ($target eq 'edit') {
308: $result.=&Apache::edit::end_table;
309: }
310: return $result;
311: }
312:
313: # <location x="123" y="456" value="some value"/>
314: sub start_location {
315: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
316: my $x= &check_int(&Apache::lonxml::get_param('x',$parstack,$safeeval),50);
317: my $y= &check_int(&Apache::lonxml::get_param('y',$parstack,$safeeval),50);
318: my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
319: my $result='';
320: push(@Apache::randomlabel::xcoord,$x);
321: push(@Apache::randomlabel::ycoord,$y);
322: push(@Apache::randomlabel::value,$value);
323: if ($target eq 'edit') {
324: $result.=&Apache::edit::tag_start($target,$token);
325: $result.=&Apache::edit::text_arg('X:','x',$token,4).
326: &Apache::edit::text_arg('Y:','y',$token,4).
327: &Apache::edit::text_arg('Value:','value',$token).
328: &Apache::edit::end_row();
329: $result.=&Apache::edit::end_table;
330: } elsif ($target eq 'modified') {
331: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
332: 'x','y','value');
333: if ($constructtag) {
334: $result = &Apache::edit::rebuild_tag($token);
335: $result.=&Apache::edit::handle_insert();
336: }
337: }
338: return $result;
339: }
340:
341: sub end_location {
342: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
343: my @result;
344: if ($target eq 'edit') { @result=('','no') }
345: return @result;
346: }
347:
348: # <label>$var_abc</label>
349: sub start_label {
350: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
351: my $result='';
352: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
353: if ($target eq 'web' || $target eq 'tex' ||
354: $target eq 'grade' || $target eq 'answer') {
355: my $ltext=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
356: $ltext=&Apache::run::evaluate($ltext,$safeeval,$$parstack[-1]);
357: if ($type eq 'image') {
358: &Apache::lonxml::debug("Turning $ltext and $Apache::lonxml::pwd[-1]");
359: $ltext="http://$ENV{'SERVER_NAME'}".&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],
360: $ltext);
361: &Apache::lonxml::debug("into $ltext");
362: my $description = &Apache::lonxml::get_param('description',
363: $parstack,$safeeval);
364: push(@Apache::randomlabel::description,$description);
365: }
366: push(@Apache::randomlabel::label_arr,$ltext);
367: } elsif ($target eq 'edit') {
368: $result.=&Apache::edit::tag_start($target,$token,"$type Label");
369: my $text=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
370: if ($type eq 'image') {
371: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
372: $result.=&Apache::edit::text_arg('Description:','description',$token);
373: }
374: if ($type eq 'text') { $result.="Label Text:"; }
375: if ($type eq 'image') { $result.="Path to image:"; }
376: $result.=&Apache::edit::editline('',$text,'',20).
377: &Apache::edit::end_table();
378: } elsif ($target eq 'modified') {
379: my $text=$$parser[-1]->get_text("/label");
380: $result = '<label>';
381: if ($type eq 'image') {
382: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
383: 'description');
384: if ($constructtag) {
385: $result = &Apache::edit::rebuild_tag($token);
386: } else {
387: $result = $token->[4];
388: }
389: }
390: $result.=&Apache::edit::modifiedfield($token);
391: }
392: return $result;
393: }
394:
395: sub end_label {
396: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
397: my @result;
398: if ($target eq 'edit') { @result=('','no') }
399: return @result;
400: }
401:
402:
403:
404: 1;
405: __END__
406:
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