Annotation of loncom/homework/randomlabel.pm, revision 1.87
1.1 tsai 1: # The LearningOnline Network with CAPA
2: # random labelling tool
1.8 albertel 3: #
1.87 ! foxr 4: # $Id: randomlabel.pm,v 1.86 2007/05/10 10:27:22 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;
1.82 www 64: use lib '/home/httpd/lib/perl/';
65: use LONCAPA;
66:
1.1 tsai 67:
1.53 albertel 68: my %args;
69: my $cgi_id;
1.73 foxr 70: my $scale_factor; # image scale factor.
1.75 foxr 71: my $label_xscale; # Label scale factor (needed for gnuplot).
72: my $label_yscale;
1.87 ! foxr 73: my $dirty_width_adjust = 5; # Width adjustment for e.g. gnuplot images.
1.76 foxr 74:
1.13 sakharuk 75: BEGIN {
1.57 albertel 76: &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label','bgimg'));
1.1 tsai 77: }
78:
1.77 foxr 79:
1.76 foxr 80:
1.23 matthew 81: sub check_int {
82: # utility function to do error checking on a integer.
83: my ($num,$default) = @_;
84: $default = 100 if (! defined($default));
85: $num =~ s/\s+//g; # We dont need no stinkin white space!
86: # If it is a real, just grab the integer part.
87: ($num,undef) = split (/\./,$num) if ($num =~ /\./);
88: # set to default if what we have left doesn't match anything...
89: $num = $default unless ($num =~/^\d+$/);
90: return $num;
91: }
92:
1.77 foxr 93: # Get width/height from an image tag...
94: #
95: # Parameters:
96: # tag - tag potentially containing height/width attributes.
97: # def_width - Default width.
98: # def_height - Default height.
99: # Returns:
100: # list containing width/height.
101: #
102: sub extract_tag_sizes {
103: my ($tag, $dw, $dh) = @_;
104: $tag =~ s/\s+/ /g; # Collapse whitespace.
105: $tag =~ s/\s*=\s*/=/g; # kill space around ='s.
106: $tag =~ s/[<>\"]//g; # Get rid of the <">'s too.
107:
108: &Apache::lonxml::debug("Compressed tag: $tag");
109: my @taglist = split(/ /,$tag);
110: foreach my $attribute (@taglist) {
111: if ($attribute =~ /^width/i) {
112: my ($e, $s)= split(/=/,$attribute);
113: $dw = $s;
114: }
115: if ($attribute =~ /^height/i) {
116: my ($e, $s) = split(/=/,$attribute);
117: $dh = $s;
118: }
119: }
120: return($dw, $dh);
121:
122: }
123:
1.64 albertel 124: my ($height_param,$width_param);
1.1 tsai 125: sub start_randomlabel {
1.76 foxr 126:
1.47 albertel 127: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
128: my $result='';
129: push (@Apache::lonxml::namespace,'randomlabel');
1.64 albertel 130: ($height_param,$width_param)=(0,0);
1.75 foxr 131: $label_xscale = 1.0; # Assume image size not overridden.
132: $label_yscale = 1.0;
1.47 albertel 133: my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
1.60 albertel 134: if ( defined($bgimg) && $bgimg !~ /^http:/ ) {
1.47 albertel 135: $bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);
1.66 raeburn 136: if (&Apache::lonnet::repcopy($bgimg) ne 'ok') {
1.47 albertel 137: $bgimg='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
138: }
1.42 www 139: }
1.59 albertel 140: $Apache::randomlabel::obj_cnt=0;
1.47 albertel 141: if ($target eq 'web') {
1.53 albertel 142: $cgi_id=&Apache::loncommon::get_cgi_id();
143: %args=();
1.82 www 144: $args{"cgi.$cgi_id.BGIMG"}=&escape($bgimg);
1.75 foxr 145: $height_param = &Apache::lonxml::get_param('height',$parstack, $safeeval);
146: $width_param = &Apache::lonxml::get_param('width', $parstack, $safeeval);
1.64 albertel 147: } elsif ($target eq 'tex' && defined($bgimg)) {
148: $result.=&make_eps_image($bgimg,$parstack,$safeeval);
1.47 albertel 149: } elsif ($target eq 'edit') {
150: $result.=&Apache::edit::tag_start($target,$token);
151: $Apache::edit::bgimgsrc=
152: &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
153: $Apache::edit::bgimgsrccurdepth=$Apache::lonxml::curdepth;
154: $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).' ';
155: $result.=&Apache::edit::browse('bgimg').' ';
156: $result.=&Apache::edit::search('bgimg').'<br />'.
157: &Apache::edit::text_arg('Width(pixel):' ,'width' ,$token,6).
158: &Apache::edit::text_arg('Height(pixel):','height' ,$token,6).
159: &Apache::edit::text_arg('TeXWidth(mm):' ,'texwidth',$token,6).
160: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
161: } elsif ($target eq 'modified') {
162: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
163: $safeeval,'bgimg','width',
164: 'height','texwidth');
165: if ($constructtag) {
166: $result = &Apache::edit::rebuild_tag($token);
167: $result.=&Apache::edit::handle_insert();
168: }
1.31 sakharuk 169: }
1.47 albertel 170: return $result;
1.1 tsai 171: }
172:
173: sub end_randomlabel {
1.47 albertel 174: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
175: my $result='';
176: my $count;
177: pop @Apache::lonxml::namespace;
178: if ($target eq 'web') {
1.59 albertel 179: $count = $Apache::randomlabel::obj_cnt;
180: if( $count != 0) { $args{"cgi.$cgi_id.OBJCOUNT"}=$count; }
1.53 albertel 181: $result.='<img src="/adm/randomlabel.png?token='.$cgi_id.'" /><br />'."\n";
182: &Apache::lonnet::appenv(%args);
1.47 albertel 183: } elsif ($target eq 'tex') {
184: $result='\end{picture}\\\\';
1.64 albertel 185: $result.= ' \vskip -'.$height_param.' mm } \\\\ ';
1.47 albertel 186: } elsif ($target eq 'edit') {
187: $result.=&Apache::edit::end_table;
188: }
189: return $result;
1.1 tsai 190: }
191:
1.77 foxr 192:
1.57 albertel 193: sub start_bgimg {
194: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
195: my $result='';
196: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1.64 albertel 197: &Apache::lonxml::startredirection();
1.57 albertel 198: }
199: return $result;
200: }
201:
202: sub end_bgimg {
203: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
204: my $result='';
205: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1.64 albertel 206: my $bgimg=&Apache::lonxml::endredirection();
1.57 albertel 207: if ($target eq 'web') {
1.77 foxr 208:
209: # If the tag produced has sizes, they override ours.
210: # (for now anyway).
211: #
212: &Apache::lonxml::debug("Base sizes: $width_param x $height_param");
213:
214: my ($plot_x, $plot_y) = &extract_tag_sizes($bgimg,
215: $width_param,
1.78 albertel 216: $height_param);
1.77 foxr 217: &Apache::lonxml::debug("Extracted sizes: $plot_x x $plot_y");
1.78 albertel 218: if ($width_param) {
219: $label_xscale = $plot_x / $width_param;
220: }
221: if ($height_param) {
222: $label_yscale = $plot_y / $height_param;
223: }
1.77 foxr 224: &Apache::lonxml::debug("Scale factors: $label_xscale $label_yscale");
225:
1.75 foxr 226: &Apache::lonxml::debug("Image: $bgimg");
1.57 albertel 227: $bgimg=&Apache::imageresponse::clean_up_image($bgimg);
1.75 foxr 228: &Apache::lonxml::debug("Cleaned image: $bgimg");
1.82 www 229: $args{"cgi.$cgi_id.BGIMG"}=&escape($bgimg);
1.57 albertel 230: } elsif ($target eq 'tex') {
1.73 foxr 231: # Some bg images can create latex for us... e.g. gnuplot.
232: # If it looks like we have some latex use that,
233: # otherwise, assume this is a resource name that must
234: # be converted into the latex to create an eps insertion.
235: #
236: my $src = $bgimg;
237: $src =~ s/\s+$//s;
238: $src =~ s/^\s+//s;
239:
1.77 foxr 240: #If this is a dynamically generated image, it will
241: #be in latex already, with a comment header that
242: #describes the dimensions:
243:
244: if($src =~ /^%DYNAMICIMAGE:/) {
245: $Apache::lonxml::debug = 0;
246: &Apache::lonxml::debug("Dynamic image");
247: my ($commentline, $junk) = split(/\n/, $src);
248: &Apache::lonxml::debug("Comment line was: $commentline");
249: my $trash;
250: my $initial_width;
251: ($trash, $initial_width, $height_param, $width_param) =
252: split(/:/,$commentline);
253: &Apache::lonxml::debug("internal web Width/height: $initial_width $height_param");
254: &Apache::lonxml::debug("Texwitdh: $width_param");
255: if($initial_width == 0) {
256: $initial_width = $width_param;
257: }
258: # strip off the comments since output does not always
259: # preserve \n's:
260: #
261: $src =~ s/$commentline//;
1.74 foxr 262: $scale_factor = $width_param / $initial_width;
263: $height_param = $height_param*$scale_factor;
1.77 foxr 264:
265: $label_xscale = 1.0; # $scale_factor;
266: $label_yscale = 1.0; # $scale_factor;
267:
1.73 foxr 268: &Apache::lonxml::debug("height $height_param");
269: &Apache::lonxml::debug("Width $width_param");
1.77 foxr 270: &Apache::lonxml::debug("Scale factors: $label_xscale $label_yscale");
1.87 ! foxr 271: my $dirty_width = $width_param + $dirty_width_adjust;
! 272: my $x_offset = -$dirty_width_adjust/2.0;
1.86 foxr 273: #
274: # Somewhere here it looks like height_param and
275: # width_param got backwards...
276: #
1.73 foxr 277: $result .= '\parbox{'.$dirty_width.'mm}{';
1.77 foxr 278: $result .= " $src \n";
1.74 foxr 279: $result .= '\setlength{\unitlength}{1mm}'."\n";
1.87 ! foxr 280: $result .= '\begin{picture}('."$width_param,$height_param)";
! 281: $result .= "($x_offset,-$height_param)";
1.74 foxr 282: $result .= "\n";
1.77 foxr 283: $Apache::lonxml::debug = 0;
1.74 foxr 284:
1.73 foxr 285: } else {
286: $result.=&make_eps_image($bgimg,$parstack,$safeeval,-2);
287: }
1.57 albertel 288: }
289: }
290: return $result;
291: }
292: sub make_eps_image {
1.64 albertel 293: my ($bgimg,$parstack,$safeeval,$depth)=@_;
1.73 foxr 294: &Apache::lonxml::debug("image prior to get_eps_image: $bgimg");
1.64 albertel 295: my ($path,$file) = &Apache::londefdef::get_eps_image($bgimg);
1.73 foxr 296: &Apache::lonxml::debug("image after: $bgimg");
1.64 albertel 297: ($height_param,$width_param)=
298: &Apache::londefdef::image_size($bgimg,0.3,$parstack,$safeeval,
299: $depth,1);
1.73 foxr 300:
301: &Apache::lonxml::debug("Image size: $height_param x $width_param");
302:
1.64 albertel 303: my $dirtywidth=$width_param+5;
1.83 foxr 304:
1.68 foxr 305: my $result ="\n".'\vspace*{2mm}\noindent'."\n".
306: '\parbox{'.$dirtywidth.
1.64 albertel 307: ' mm}{ \noindent \epsfxsize='.$width_param.
1.85 albertel 308: ' mm \epsffile{'.$path.$file.
1.68 foxr 309: '}\setlength{\unitlength}{1mm}'."\n".' \begin{picture}('.
310: $width_param.','.$height_param.')(0,-'.$height_param.')'."\n";
1.72 foxr 311: my $magick = Image::Magick->new;
312: $magick->Read($bgimg);
313: my $initial_width = $magick->Get('width');
1.73 foxr 314: &Apache::lonxml::debug("ImageMagick thinks width is; $initial_width");
1.72 foxr 315: $scale_factor = $width_param / $initial_width;
1.57 albertel 316: return $result;
317: }
318:
1.1 tsai 319: sub start_labelgroup {
1.47 albertel 320: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
321: my $result='';
322: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
323: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
324: $type =~tr/A-Z/a-z/;
1.48 albertel 325: if ($target ne 'modified' && ($name =~ /\W/ || $name =~ /^[0-9]/)) {
326: &Apache::lonxml::error("Only _ a-z A-Z and 0-9 are allowed in the name to a labelgroup, and the first character can not be a number.<br />");
327: }
1.47 albertel 328: if ($target eq 'web' || $target eq 'tex' ||
329: $target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
330: $Apache::randomlabel::groupname=$name;
331: $Apache::randomlabel::type=$type;
332: @Apache::randomlabel::xcoord = ();
333: @Apache::randomlabel::ycoord = ();
334: @Apache::randomlabel::value = ();
335: @Apache::randomlabel::label_arr = ();
1.68 foxr 336: @Apache::randomlabel::description = ();
1.47 albertel 337: } elsif ($target eq 'edit') {
338: $result.=&Apache::edit::tag_start($target,$token);
339: $result.=&Apache::edit::text_arg('Name:','name',$token).
1.63 albertel 340: &Apache::edit::select_arg('Type:','type',['text','image'],$token);
341: if (!defined($token->[2]{'TeXsize'})) {
342: $token->[2]{'TeXsize'}='\normalsize';
343: }
344: $result.=&Apache::edit::select_arg('TeX font size:','TeXsize',
345: ['\tiny','\scriptsize',
346: '\footnotesize','\small',
347: '\normalsize','\large','\Large',
348: '\LARGE','\huge','\Huge'],
349: $token);
350: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1.47 albertel 351: } elsif ($target eq 'modified') {
352: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.63 albertel 353: $safeeval,'name','type',
354: 'TeXsize');
1.47 albertel 355: if ($constructtag) {
356: $result = &Apache::edit::rebuild_tag($token);
357: $result.=&Apache::edit::handle_insert();
358: }
1.4 albertel 359: }
1.47 albertel 360: return $result;
1.1 tsai 361: }
362:
1.72 foxr 363: #
364: # Utility sub to compute the width of a label.
365: #
366: sub get_label_width {
367: my $label = shift;
368: &Apache::lonxml::debug("image label = $label");
369: if (-e $label) {
370: &Apache::lonxml::debug("$label exists");
371: } else {
372: &Apache::lonxml::debug("$label does not exist");
373: }
374: my $magick = Image::Magick->new;
375: $magick->Read($label);
376: my $pixel_width = $magick->Get('width');
377: return $pixel_width * $scale_factor;
378:
379:
380: }
1.79 albertel 381:
382: sub get_label_height {
383: my $label = shift;
384: &Apache::lonxml::debug("image label = $label");
385: if (-e $label) {
386: &Apache::lonxml::debug("$label exists");
387: } else {
388: &Apache::lonxml::debug("$label does not exist");
389: }
390: my $magick = Image::Magick->new;
391: $magick->Read($label);
392: my $pixel_height = $magick->Get('height');
393: return $pixel_height * $scale_factor;
394: }
395:
1.5 albertel 396: sub add_vars {
1.47 albertel 397: my ($name,$order,$label,$labelorder,$value,$image,$safeeval) = @_;
1.61 albertel 398: if (!defined($name) || $name eq '') { return; }
1.47 albertel 399: my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
400: my $out=Apache::run::run($code,$safeeval);
401: if ($value) {
402: $code = '${'.$name."}{'value_".($order+1)."'}='".$value."';";
403: $out=Apache::run::run($code,$safeeval);
404: $code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';";
405: $out=Apache::run::run($code,$safeeval);
406: }
407: if ($image) {
408: my $code = '${'.$name."}{'image_".($order+1)."'}='".$image."';";
409: my $out=Apache::run::run($code,$safeeval);
410: }
411: $code = '${'.$name."}{'numlocations'}='".($order+1)."';";
1.5 albertel 412: $out=Apache::run::run($code,$safeeval);
1.4 albertel 413: }
1.5 albertel 414:
1.1 tsai 415: # begin to assign labels to locations
416: sub end_labelgroup {
1.47 albertel 417: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
418: my $gname = $Apache::randomlabel::groupname;
419: my $type = $Apache::randomlabel::type;
420: my $result='';
421: if ($target eq 'web' || $target eq 'answer' || $target eq 'grade' ||
422: $target eq 'analyze') {
423: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
424: &Apache::structuretags::shuffle(\@idx_arr);
425: for(0 .. $#Apache::randomlabel::label_arr) {
426: my $str;
427: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
428: my $x = $Apache::randomlabel::xcoord[$_];
429: my $y = $Apache::randomlabel::ycoord[$_];
430: my $value = $Apache::randomlabel::value[$_];
1.59 albertel 431: my $i=$Apache::randomlabel::obj_cnt++;
1.47 albertel 432: if( $type eq 'text') {
433: &add_vars($gname,$_,$label,$idx_arr[$_],$value,'',$safeeval);
1.82 www 434: $str = join(':',$x,$y,&escape($label));
1.59 albertel 435: $args{"cgi.$cgi_id.OBJTYPE"}.='LABEL:';
1.47 albertel 436: } elsif ( $type eq 'image') {
437: &add_vars($gname,$_,
438: $Apache::randomlabel::description[$idx_arr[$_]],
439: $idx_arr[$_],$value,$label,$safeeval);
1.82 www 440: $str = join(':',$x,$y,&escape($label));
1.59 albertel 441: $args{"cgi.$cgi_id.OBJTYPE"}.='IMAGE:';
1.47 albertel 442: } else {
443: &Apache::lonxml::error('Unknown type of label :'.$type.':');
444: }
1.59 albertel 445: if ($target eq 'web') { $args{"cgi.$cgi_id.OBJ$i"} =$str; }
1.47 albertel 446: }
447: } elsif ($target eq 'tex') {
448: my $WX1=0; # Web x-coord. of upper left corner (ULC)
449: my $WY1=0; # Web y-coord. of (ULC)
450: my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
451: my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
1.63 albertel 452: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
453: if (!defined($TeXsize)) { $TeXsize='\\normalsize'; }
1.62 albertel 454:
1.47 albertel 455: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
456: &Apache::structuretags::shuffle(\@idx_arr);
457:
458: &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
1.77 foxr 459: $Apache::lonxml::debug = 0;
1.47 albertel 460: for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
461: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
462: my $x = $Apache::randomlabel::xcoord[$i];
1.80 albertel 463: my $y = $Apache::randomlabel::ycoord[$i];
464: if ( $type eq 'text' ) {
465: # FIXME the 3.5 here is the 'height' of the letter in TeX
466: $y=$y-3.5;
467: }
1.77 foxr 468: &Apache::lonxml::debug("initially: x= $x y= $y");
1.47 albertel 469: my $value = $Apache::randomlabel::value[$i];
470: #x latex coordinate
1.64 albertel 471: my $tcX=($x)*($width_param/$wwidth);
1.77 foxr 472: &Apache::lonxml::debug("wparam = $width_param wwidth = $wwidth, texx = $tcX");
1.47 albertel 473: #y latex coordinate
474: # my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 );
1.64 albertel 475: my $tcY=$height_param-$y*($height_param/$wheight);
1.79 albertel 476: if ( $type eq 'image') {
477: my $label_height = &get_label_height($label);
478: $tcY=$tcY-$label_height;
479: }
480:
1.77 foxr 481: &Apache::lonxml::debug("hparam = $height_param wheight = $wheight texy = $tcY");
1.47 albertel 482: $tcX=sprintf('%.2f',$tcX);
483: $tcY=sprintf('%.2f',$tcY);
1.70 foxr 484: $result .= '\put('.$tcX.','.$tcY.'){';
1.47 albertel 485: if( $type eq 'text') {
1.70 foxr 486: $result.= $TeXsize.' \bf '.$label."}\n";
1.47 albertel 487: &add_vars($gname,$i,$label,$idx_arr[$i],$value,'',$safeeval);
488: } elsif ( $type eq 'image') {
1.71 foxr 489: my ($path,$file) = &Apache::londefdef::get_eps_image($label);
490: my $image_name = $path.$file;
1.83 foxr 491: #
492: # Note that spaces in e.. \includegraphics cause problems for Latex
493: # so they get replaced by _'s by lonprintout/printout and us:
494: #
1.79 albertel 495: my $label_width = &get_label_width($label);
1.72 foxr 496:
497: $result .= '\includegraphics[width='.$label_width.'mm]{'
1.71 foxr 498: .$image_name."}}\n";
1.47 albertel 499: &add_vars($gname,$i,
500: $Apache::randomlabel::description[$idx_arr[$i]],
501: $idx_arr[$i],$value,$label,$safeeval);
502: } else {
503: &Apache::lonxml::error('Unknown type of label :'.$type.':');
504: }
505: }
1.77 foxr 506: $Apache::lonxml::debug =0;
1.47 albertel 507: } elsif ($target eq 'edit') {
508: $result.=&Apache::edit::end_table;
1.3 tsai 509: }
1.47 albertel 510: return $result;
1.1 tsai 511: }
512:
1.5 albertel 513: # <location x="123" y="456" value="some value"/>
1.1 tsai 514: sub start_location {
1.77 foxr 515: $Apache::lonxml::debug = 0;
1.47 albertel 516: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
517: my $x= &check_int(&Apache::lonxml::get_param('x',$parstack,$safeeval),50);
518: my $y= &check_int(&Apache::lonxml::get_param('y',$parstack,$safeeval),50);
1.75 foxr 519: &Apache::lonxml::debug("x = $x y = $y");
520: $x = $x*$label_xscale;
521: $y = $y*$label_yscale;
522: &Apache::lonxml::debug(" H = $height_param W = $width_param");
523: &Apache::lonxml::debug(" XS = $label_xscale YS = $label_yscale");
524: &Apache::lonxml::debug(" X = $x Y = $y");
1.47 albertel 525: my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
526: my $result='';
527: push(@Apache::randomlabel::xcoord,$x);
528: push(@Apache::randomlabel::ycoord,$y);
529: push(@Apache::randomlabel::value,$value);
530: if ($target eq 'edit') {
531: $result.=&Apache::edit::tag_start($target,$token);
532: $result.=&Apache::edit::text_arg('X:','x',$token,4).
533: &Apache::edit::text_arg('Y:','y',$token,4).
534: &Apache::edit::entercoords('x','y','attribute','width','height').' '.
535: &Apache::edit::text_arg('Value:','value',$token).
536: &Apache::edit::end_row();
537: $result.=&Apache::edit::end_table;
538: } elsif ($target eq 'modified') {
539: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
540: $safeeval,'x','y','value');
541: if ($constructtag) {
542: $result = &Apache::edit::rebuild_tag($token);
543: $result.=&Apache::edit::handle_insert();
544: }
1.4 albertel 545: }
1.77 foxr 546: $Apache::lonxml::debug = 0;
1.47 albertel 547: return $result;
1.1 tsai 548: }
549:
550: sub end_location {
1.47 albertel 551: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
552: my @result;
553: if ($target eq 'edit') { @result=('','no') }
554: return @result;
1.1 tsai 555: }
556:
1.2 tsai 557: # <label>$var_abc</label>
1.1 tsai 558: sub start_label {
1.47 albertel 559: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
560: my $result='';
561: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
562: if ($target eq 'web' || $target eq 'tex' ||
563: $target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
1.57 albertel 564: &Apache::lonxml::startredirection;
1.47 albertel 565: } elsif ($target eq 'edit') {
566: $result.=&Apache::edit::tag_start($target,$token,"$type Label");
1.81 albertel 567: my $text=&Apache::lonxml::get_all_text("/label",$parser,$style);
1.47 albertel 568: if ($type eq 'image') {
569: $result.=&Apache::edit::end_row().
570: &Apache::edit::start_spanning_row();
571: $result.=&Apache::edit::text_arg('Description:','description',
572: $token);
573: }
574: if ($type eq 'text') { $result.="Label Text:"; }
575: if ($type eq 'image') { $result.="Path to image: "; }
576: $result.=&Apache::edit::editline('',$text,'',50).
577: &Apache::edit::end_table();
578: } elsif ($target eq 'modified') {
579: $result = '<label>';
580: if ($type eq 'image') {
581: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
582: $safeeval,
583: 'description');
584: if ($constructtag) {
585: $result = &Apache::edit::rebuild_tag($token);
586: } else {
587: $result = $token->[4];
588: }
589: }
1.52 albertel 590: $result.=&Apache::edit::modifiedfield("/label",$parser);
1.26 albertel 591: }
1.47 albertel 592: return $result;
1.1 tsai 593: }
594:
595: sub end_label {
1.47 albertel 596: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
597: my @result;
1.57 albertel 598: if ($target eq 'edit') {
599: @result=('','no') ;
600: } elsif ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
601: $target eq 'answer' || $target eq 'analyze') {
602: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
603: my $ltext=&Apache::lonxml::endredirection;
604: if ($type eq 'image') {
1.70 foxr 605: if ($target eq 'tex') {
606: # For tex targets, our image url has been potentially corrupted
607: # by prepending \'s in front of special latex symbols.
608: # For now we only worry about the _ case (most common?)
609: # There's a whole host of theim in lonxml::latex_special_symbols
610: # that could potentially have to be re-done.
611:
612: $ltext =~ s/\\_/_/g;
613: }
1.57 albertel 614: &Apache::lonxml::debug("Turning $ltext, $Apache::lonxml::pwd[-1]");
615: $ltext=&Apache::imageresponse::clean_up_image($ltext);
616: # $ltext=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],
617: # $ltext);
618: &Apache::lonxml::debug("into $ltext");
619: my $description = &Apache::lonxml::get_param('description',
620: $parstack,$safeeval);
621: push(@Apache::randomlabel::description,$description);
1.61 albertel 622: } else {
623: $ltext=~s/[\r\n]*//gs
1.57 albertel 624: }
625: push(@Apache::randomlabel::label_arr,$ltext);
626: }
1.47 albertel 627: return @result;
1.1 tsai 628: }
629:
630: 1;
631: __END__
632:
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