1: # The LearningOnline Network with CAPA
2: # random labelling tool
3: #
4: # $Id: randomlabel.pm,v 1.32 2002/07/30 16:12:38 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: if ($texwidth==90) {
119: $result.='\vspace*{2mm} \noindent \epsfxsize='.$texwidth.' mm \epsffile{'.
120: $bgimg.'}\setlength{\unitlength}{1mm} \begin{picture}('.$texwidth.','.$texwidth*$h/$w.')';
121: } else {
122: $result.='\vspace*{2mm} \noindent \epsfxsize='.$texwidth.' mm \epsffile{'.
123: $bgimg.'}\setlength{\unitlength}{1mm} \begin{picture}('.$texwidth.','.$texwidth*$h/$w.')('.(100-$texwidth).','.(100-$texwidth)*$h/$w.')';
124: }
125: } elsif ($target eq 'edit') {
126: $result.=&Apache::edit::tag_start($target,$token);
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,$parstack,$safeeval,
136: 'bgimg','width','height',
137: 'texwidth');
138: if ($constructtag) {
139: $result = &Apache::edit::rebuild_tag($token);
140: $result.=&Apache::edit::handle_insert();
141: }
142: }
143: return $result;
144: }
145:
146: sub end_randomlabel {
147: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
148: my $result='';
149: my $count;
150: pop @Apache::lonxml::namespace;
151: if ($target eq 'web') {
152: $count = $Apache::randomlabel::tlabel_cnt;
153: if( $count != 0) { $result.= "<param name=\"COUNT\" value=\"$count\">\n"; }
154: $count = $Apache::randomlabel::ilabel_cnt;
155: if( $count != 0) { $result.= "<param name=\"ICOUNT\" value=\"$count\">\n"; }
156: $result .= "</applet>\n<BR />";
157: } elsif ($target eq 'tex') {
158: $result='\end{picture}\\\\';
159: if (@$parstack[-1]=~/\$texwidth\s*=\s*?"90/) { #"
160: @$parstack[-1]=~/\$height\s*=\s*?"(.+)?"/;
161: my $howtoskipback = $1/48;
162: $result.=' \vskip -'.$howtoskipback.' cm ';
163: }
164: } elsif ($target eq 'edit') {
165: $result.=&Apache::edit::end_table;
166: }
167: return $result;
168: }
169:
170: sub start_labelgroup {
171: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
172: my $result='';
173: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
174: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
175: $type =~tr/A-Z/a-z/;
176: if ($target eq 'web' || $target eq 'tex' ||
177: $target eq 'grade' || $target eq 'answer') {
178: $Apache::randomlabel::groupname=$name;
179: $Apache::randomlabel::type=$type;
180: @Apache::randomlabel::xcoord = ();
181: @Apache::randomlabel::ycoord = ();
182: @Apache::randomlabel::value = ();
183: @Apache::randomlabel::label_arr = ();
184: @Apache::randomlabel::decription = ();
185: } elsif ($target eq 'edit') {
186: $result.=&Apache::edit::tag_start($target,$token);
187: $result.=&Apache::edit::text_arg('Name:','name',$token).
188: &Apache::edit::select_arg('Type:','type',['text','image'],$token).
189: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
190: } elsif ($target eq 'modified') {
191: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
192: 'name','type');
193: if ($constructtag) {
194: $result = &Apache::edit::rebuild_tag($token);
195: $result.=&Apache::edit::handle_insert();
196: }
197: }
198: return $result;
199: }
200:
201: sub add_vars {
202: my ($name,$order,$label,$labelorder,$value,$image,$safeeval) = @_;
203: my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
204: my $out=Apache::run::run($code,$safeeval);
205: if ($value) {
206: $code = '${'.$name."}{'value_".($order+1)."'}='".$value."';";
207: $out=Apache::run::run($code,$safeeval);
208: $code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';";
209: $out=Apache::run::run($code,$safeeval);
210: }
211: if ($image) {
212: my $code = '${'.$name."}{'image_".($order+1)."'}='".$image."';";
213: my $out=Apache::run::run($code,$safeeval);
214: }
215: $code = '${'.$name."}{'numlocations'}='".($order+1)."';";
216: $out=Apache::run::run($code,$safeeval);
217: }
218:
219: # begin to assign labels to locations
220: sub end_labelgroup {
221: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
222: my $gname = $Apache::randomlabel::groupname;
223: my $type = $Apache::randomlabel::type;
224: my $result='';
225: if ($target eq 'web' || $target eq 'answer' || $target eq 'grade') {
226: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
227: &Apache::structuretags::shuffle(\@idx_arr);
228: for(0 .. $#Apache::randomlabel::label_arr) {
229: my $str;
230: my $xstr;
231: my $ystr;
232: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
233: my $x = $Apache::randomlabel::xcoord[$_];
234: my $y = $Apache::randomlabel::ycoord[$_];
235: my $value = $Apache::randomlabel::value[$_];
236: if( $type eq 'text') {
237: &add_vars($gname,$_,$label,$idx_arr[$_],$value,'',$safeeval);
238: $str = 'LB'.$Apache::randomlabel::tlabel_cnt;
239: $xstr = 'X'.$Apache::randomlabel::tlabel_cnt;
240: $ystr = 'Y'.$Apache::randomlabel::tlabel_cnt;
241: $Apache::randomlabel::tlabel_cnt += 1;
242: } elsif ( $type eq 'image') {
243: &add_vars($gname,$_,
244: $Apache::randomlabel::description[$idx_arr[$_]],
245: $idx_arr[$_],$value,$label,$safeeval);
246: $str = 'IMG'.$Apache::randomlabel::ilabel_cnt;
247: $xstr = 'IX'.$Apache::randomlabel::ilabel_cnt;
248: $ystr = 'IY'.$Apache::randomlabel::ilabel_cnt;
249: $Apache::randomlabel::ilabel_cnt += 1;
250: } else {
251: &Apache::lonxml::error('Unknown type of label :'.$type.':');
252: }
253: if ($target eq 'web') {
254: $result .= '<param name="' . $str . '" value="'.$label.'">';
255: $result .= '<param name="' . $xstr . '" value="'.$x.'">';
256: $result .= '<param name="' . $ystr . '" value="'.$y.'">'."\n";
257: }
258: }
259: } elsif ($target eq 'tex') {
260: my $WX1=0; # Web x-coord. of upper left corner (ULC)
261: my $WY1=0; # Web y-coord. of (ULC)
262: my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
263: my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
264: my $texwidth=&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,-2);
265: my $TX1=0;
266: my $TY1=$texwidth*($wheight/$wwidth);
267: my $TX2=$texwidth;
268: my $TY2=0;
269:
270:
271: my $slopex=($wwidth-$WX1)/($TX2-$TX1);
272: my $slopey=($wheight-$WY1)/($TY2-($TY1-1.0));
273: my $cstx=$wwidth-$slopex*($TX2);
274: my $csty=$wheight-$slopey*($TY2);
275:
276: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
277: &Apache::structuretags::shuffle(\@idx_arr);
278:
279: &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
280: for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
281: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
282: my $x = $Apache::randomlabel::xcoord[$i];
283: my $y = $Apache::randomlabel::ycoord[$i];
284: my $value = $Apache::randomlabel::value[$i];
285: #x latex coordinate
286: my $tcX=($x-5)*($texwidth/$wwidth);
287: #y latex coordinate
288: my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 );
289: my $tcY=$TY1-$y*($TY1/$wheight)+$texwidth*$ratio;
290: $tcX=sprintf('%.2f',$tcX);
291: $tcY=sprintf('%.2f',$tcY);
292: $result.='\put('.$tcX.','.$tcY.'){\normalsize \bf '.$label.'}'."\n";
293: if( $type eq 'text') {
294: &add_vars($gname,$i,$label,$idx_arr[$i],$value,'',$safeeval);
295: } elsif ( $type eq 'image') {
296: &add_vars($gname,$i,
297: $Apache::randomlabel::description[$idx_arr[$i]],
298: $idx_arr[$i],$value,$label,$safeeval);
299: } else {
300: &Apache::lonxml::error('Unknown type of label :'.$type.':');
301: }
302: }
303: } elsif ($target eq 'edit') {
304: $result.=&Apache::edit::end_table;
305: }
306: return $result;
307: }
308:
309: # <location x="123" y="456" value="some value"/>
310: sub start_location {
311: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
312: my $x= &check_int(&Apache::lonxml::get_param('x',$parstack,$safeeval),50);
313: my $y= &check_int(&Apache::lonxml::get_param('y',$parstack,$safeeval),50);
314: my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
315: my $result='';
316: push(@Apache::randomlabel::xcoord,$x);
317: push(@Apache::randomlabel::ycoord,$y);
318: push(@Apache::randomlabel::value,$value);
319: if ($target eq 'edit') {
320: $result.=&Apache::edit::tag_start($target,$token);
321: $result.=&Apache::edit::text_arg('X:','x',$token,4).
322: &Apache::edit::text_arg('Y:','y',$token,4).
323: &Apache::edit::text_arg('Value:','value',$token).
324: &Apache::edit::end_row();
325: $result.=&Apache::edit::end_table;
326: } elsif ($target eq 'modified') {
327: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
328: 'x','y','value');
329: if ($constructtag) {
330: $result = &Apache::edit::rebuild_tag($token);
331: $result.=&Apache::edit::handle_insert();
332: }
333: }
334: return $result;
335: }
336:
337: sub end_location {
338: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
339: my @result;
340: if ($target eq 'edit') { @result=('','no') }
341: return @result;
342: }
343:
344: # <label>$var_abc</label>
345: sub start_label {
346: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
347: my $result='';
348: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
349: if ($target eq 'web' || $target eq 'tex' ||
350: $target eq 'grade' || $target eq 'answer') {
351: my $ltext=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
352: $ltext=&Apache::run::evaluate($ltext,$safeeval,$$parstack[-1]);
353: if ($type eq 'image') {
354: &Apache::lonxml::debug("Turning $ltext and $Apache::lonxml::pwd[-1]");
355: $ltext="http://$ENV{'SERVER_NAME'}".&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],
356: $ltext);
357: &Apache::lonxml::debug("into $ltext");
358: my $description = &Apache::lonxml::get_param('description',
359: $parstack,$safeeval);
360: push(@Apache::randomlabel::description,$description);
361: }
362: push(@Apache::randomlabel::label_arr,$ltext);
363: } elsif ($target eq 'edit') {
364: $result.=&Apache::edit::tag_start($target,$token,"$type Label");
365: my $text=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
366: if ($type eq 'image') {
367: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
368: $result.=&Apache::edit::text_arg('Description:','description',$token);
369: }
370: if ($type eq 'text') { $result.="Label Text:"; }
371: if ($type eq 'image') { $result.="Path to image:"; }
372: $result.=&Apache::edit::editline('',$text,'',20).
373: &Apache::edit::end_table();
374: } elsif ($target eq 'modified') {
375: my $text=$$parser[-1]->get_text("/label");
376: $result = '<label>';
377: if ($type eq 'image') {
378: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
379: 'description');
380: if ($constructtag) {
381: $result = &Apache::edit::rebuild_tag($token);
382: } else {
383: $result = $token->[4];
384: }
385: }
386: $result.=&Apache::edit::modifiedfield($token);
387: }
388: return $result;
389: }
390:
391: sub end_label {
392: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
393: my @result;
394: if ($target eq 'edit') { @result=('','no') }
395: return @result;
396: }
397:
398:
399:
400: 1;
401: __END__
402:
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