Annotation of loncom/homework/randomlabel.pm, revision 1.77
1.1 tsai 1: # The LearningOnline Network with CAPA
2: # random labelling tool
1.8 albertel 3: #
1.77 ! foxr 4: # $Id: randomlabel.pm,v 1.76 2005/05/31 22:14:32 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;
1.1 tsai 64:
1.53 albertel 65: my %args;
66: my $cgi_id;
1.73 foxr 67: my $scale_factor; # image scale factor.
1.75 foxr 68: my $label_xscale; # Label scale factor (needed for gnuplot).
69: my $label_yscale;
1.76 foxr 70:
71:
1.13 sakharuk 72: BEGIN {
1.57 albertel 73: &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label','bgimg'));
1.1 tsai 74: }
75:
1.77 ! foxr 76:
1.76 foxr 77:
1.23 matthew 78: sub check_int {
79: # utility function to do error checking on a integer.
80: my ($num,$default) = @_;
81: $default = 100 if (! defined($default));
82: $num =~ s/\s+//g; # We dont need no stinkin white space!
83: # If it is a real, just grab the integer part.
84: ($num,undef) = split (/\./,$num) if ($num =~ /\./);
85: # set to default if what we have left doesn't match anything...
86: $num = $default unless ($num =~/^\d+$/);
87: return $num;
88: }
89:
1.77 ! foxr 90: # Get width/height from an image tag...
! 91: #
! 92: # Parameters:
! 93: # tag - tag potentially containing height/width attributes.
! 94: # def_width - Default width.
! 95: # def_height - Default height.
! 96: # Returns:
! 97: # list containing width/height.
! 98: #
! 99: sub extract_tag_sizes {
! 100: my ($tag, $dw, $dh) = @_;
! 101: $tag =~ s/\s+/ /g; # Collapse whitespace.
! 102: $tag =~ s/\s*=\s*/=/g; # kill space around ='s.
! 103: $tag =~ s/[<>\"]//g; # Get rid of the <">'s too.
! 104:
! 105: &Apache::lonxml::debug("Compressed tag: $tag");
! 106: my @taglist = split(/ /,$tag);
! 107: foreach my $attribute (@taglist) {
! 108: if ($attribute =~ /^width/i) {
! 109: my ($e, $s)= split(/=/,$attribute);
! 110: $dw = $s;
! 111: }
! 112: if ($attribute =~ /^height/i) {
! 113: my ($e, $s) = split(/=/,$attribute);
! 114: $dh = $s;
! 115: }
! 116: }
! 117: return($dw, $dh);
! 118:
! 119: }
! 120:
1.64 albertel 121: my ($height_param,$width_param);
1.1 tsai 122: sub start_randomlabel {
1.76 foxr 123:
1.47 albertel 124: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
125: my $result='';
126: push (@Apache::lonxml::namespace,'randomlabel');
1.64 albertel 127: ($height_param,$width_param)=(0,0);
1.75 foxr 128: $label_xscale = 1.0; # Assume image size not overridden.
129: $label_yscale = 1.0;
1.47 albertel 130: my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
1.60 albertel 131: if ( defined($bgimg) && $bgimg !~ /^http:/ ) {
1.47 albertel 132: $bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);
1.66 raeburn 133: if (&Apache::lonnet::repcopy($bgimg) ne 'ok') {
1.47 albertel 134: $bgimg='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
135: }
1.42 www 136: }
1.59 albertel 137: $Apache::randomlabel::obj_cnt=0;
1.47 albertel 138: if ($target eq 'web') {
1.53 albertel 139: $cgi_id=&Apache::loncommon::get_cgi_id();
140: %args=();
141: $args{"cgi.$cgi_id.BGIMG"}=&Apache::lonnet::escape($bgimg);
1.75 foxr 142: $height_param = &Apache::lonxml::get_param('height',$parstack, $safeeval);
143: $width_param = &Apache::lonxml::get_param('width', $parstack, $safeeval);
1.64 albertel 144: } elsif ($target eq 'tex' && defined($bgimg)) {
145: $result.=&make_eps_image($bgimg,$parstack,$safeeval);
1.47 albertel 146: } elsif ($target eq 'edit') {
147: $result.=&Apache::edit::tag_start($target,$token);
148: $Apache::edit::bgimgsrc=
149: &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
150: $Apache::edit::bgimgsrccurdepth=$Apache::lonxml::curdepth;
151: $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).' ';
152: $result.=&Apache::edit::browse('bgimg').' ';
153: $result.=&Apache::edit::search('bgimg').'<br />'.
154: &Apache::edit::text_arg('Width(pixel):' ,'width' ,$token,6).
155: &Apache::edit::text_arg('Height(pixel):','height' ,$token,6).
156: &Apache::edit::text_arg('TeXWidth(mm):' ,'texwidth',$token,6).
157: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
158: } elsif ($target eq 'modified') {
159: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
160: $safeeval,'bgimg','width',
161: 'height','texwidth');
162: if ($constructtag) {
163: $result = &Apache::edit::rebuild_tag($token);
164: $result.=&Apache::edit::handle_insert();
165: }
1.31 sakharuk 166: }
1.47 albertel 167: return $result;
1.1 tsai 168: }
169:
170: sub end_randomlabel {
1.47 albertel 171: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
172: my $result='';
173: my $count;
174: pop @Apache::lonxml::namespace;
175: if ($target eq 'web') {
1.59 albertel 176: $count = $Apache::randomlabel::obj_cnt;
177: if( $count != 0) { $args{"cgi.$cgi_id.OBJCOUNT"}=$count; }
1.53 albertel 178: $result.='<img src="/adm/randomlabel.png?token='.$cgi_id.'" /><br />'."\n";
179: &Apache::lonnet::appenv(%args);
1.47 albertel 180: } elsif ($target eq 'tex') {
181: $result='\end{picture}\\\\';
1.64 albertel 182: $result.= ' \vskip -'.$height_param.' mm } \\\\ ';
1.47 albertel 183: } elsif ($target eq 'edit') {
184: $result.=&Apache::edit::end_table;
185: }
186: return $result;
1.1 tsai 187: }
188:
1.77 ! foxr 189:
1.57 albertel 190: sub start_bgimg {
191: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
192: my $result='';
193: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1.64 albertel 194: &Apache::lonxml::startredirection();
1.57 albertel 195: }
196: return $result;
197: }
198:
199: sub end_bgimg {
200: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
201: my $result='';
202: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1.64 albertel 203: my $bgimg=&Apache::lonxml::endredirection();
1.57 albertel 204: if ($target eq 'web') {
1.77 ! foxr 205:
! 206: # If the tag produced has sizes, they override ours.
! 207: # (for now anyway).
! 208: #
! 209:
! 210: &Apache::lonxml::debug("Base sizes: $width_param x $height_param");
! 211:
! 212: my ($plot_x, $plot_y) = &extract_tag_sizes($bgimg,
! 213: $width_param,
! 214: $height_param );
! 215: &Apache::lonxml::debug("Extracted sizes: $plot_x x $plot_y");
! 216: $label_xscale = $plot_x / $width_param;
! 217: $label_yscale = $plot_y / $height_param;
! 218: &Apache::lonxml::debug("Scale factors: $label_xscale $label_yscale");
! 219:
1.75 foxr 220: &Apache::lonxml::debug("Image: $bgimg");
1.57 albertel 221: $bgimg=&Apache::imageresponse::clean_up_image($bgimg);
1.75 foxr 222: &Apache::lonxml::debug("Cleaned image: $bgimg");
1.57 albertel 223: $args{"cgi.$cgi_id.BGIMG"}=&Apache::lonnet::escape($bgimg);
224: } elsif ($target eq 'tex') {
1.73 foxr 225: # Some bg images can create latex for us... e.g. gnuplot.
226: # If it looks like we have some latex use that,
227: # otherwise, assume this is a resource name that must
228: # be converted into the latex to create an eps insertion.
229: #
230: my $src = $bgimg;
231: $src =~ s/\s+$//s;
232: $src =~ s/^\s+//s;
233:
1.77 ! foxr 234: #If this is a dynamically generated image, it will
! 235: #be in latex already, with a comment header that
! 236: #describes the dimensions:
! 237:
! 238: if($src =~ /^%DYNAMICIMAGE:/) {
! 239: $Apache::lonxml::debug = 0;
! 240: &Apache::lonxml::debug("Dynamic image");
! 241: my ($commentline, $junk) = split(/\n/, $src);
! 242: &Apache::lonxml::debug("Comment line was: $commentline");
! 243: my $trash;
! 244: my $initial_width;
! 245: ($trash, $initial_width, $height_param, $width_param) =
! 246: split(/:/,$commentline);
! 247: &Apache::lonxml::debug("internal web Width/height: $initial_width $height_param");
! 248: &Apache::lonxml::debug("Texwitdh: $width_param");
! 249: if($initial_width == 0) {
! 250: $initial_width = $width_param;
! 251: }
! 252: # strip off the comments since output does not always
! 253: # preserve \n's:
! 254: #
! 255: $src =~ s/$commentline//;
1.74 foxr 256: $scale_factor = $width_param / $initial_width;
257: $height_param = $height_param*$scale_factor;
1.77 ! foxr 258:
! 259: $label_xscale = 1.0; # $scale_factor;
! 260: $label_yscale = 1.0; # $scale_factor;
! 261:
1.73 foxr 262: &Apache::lonxml::debug("height $height_param");
263: &Apache::lonxml::debug("Width $width_param");
1.77 ! foxr 264: &Apache::lonxml::debug("Scale factors: $label_xscale $label_yscale");
1.73 foxr 265: my $dirty_width = $width_param + 5;
266: $result .= '\parbox{'.$dirty_width.'mm}{';
1.77 ! foxr 267: $result .= " $src \n";
1.74 foxr 268: $result .= '\setlength{\unitlength}{1mm}'."\n";
1.73 foxr 269: $result .= '\begin{picture}('."$height_param,$width_param)";
270: $result .= "(0,-$height_param)";
1.74 foxr 271: $result .= "\n";
1.77 ! foxr 272: $Apache::lonxml::debug = 0;
1.74 foxr 273:
1.73 foxr 274: } else {
275:
276:
277: $result.=&make_eps_image($bgimg,$parstack,$safeeval,-2);
278: }
1.57 albertel 279: }
280: }
281: return $result;
282: }
283: sub make_eps_image {
1.64 albertel 284: my ($bgimg,$parstack,$safeeval,$depth)=@_;
1.73 foxr 285: &Apache::lonxml::debug("image prior to get_eps_image: $bgimg");
1.64 albertel 286: my ($path,$file) = &Apache::londefdef::get_eps_image($bgimg);
1.73 foxr 287: &Apache::lonxml::debug("image after: $bgimg");
1.64 albertel 288: ($height_param,$width_param)=
289: &Apache::londefdef::image_size($bgimg,0.3,$parstack,$safeeval,
290: $depth,1);
1.73 foxr 291:
292: &Apache::lonxml::debug("Image size: $height_param x $width_param");
293:
1.64 albertel 294: my $dirtywidth=$width_param+5;
1.68 foxr 295: my $result ="\n".'\vspace*{2mm}\noindent'."\n".
296: '\parbox{'.$dirtywidth.
1.64 albertel 297: ' mm}{ \noindent \epsfxsize='.$width_param.
298: ' mm \epsffile{'.$path.$file.
1.68 foxr 299: '}\setlength{\unitlength}{1mm}'."\n".' \begin{picture}('.
300: $width_param.','.$height_param.')(0,-'.$height_param.')'."\n";
1.72 foxr 301: my $magick = Image::Magick->new;
302: $magick->Read($bgimg);
303: my $initial_width = $magick->Get('width');
1.73 foxr 304: &Apache::lonxml::debug("ImageMagick thinks width is; $initial_width");
1.72 foxr 305: $scale_factor = $width_param / $initial_width;
1.57 albertel 306: return $result;
307: }
308:
1.1 tsai 309: sub start_labelgroup {
1.47 albertel 310: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
311: my $result='';
312: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
313: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
314: $type =~tr/A-Z/a-z/;
1.48 albertel 315: if ($target ne 'modified' && ($name =~ /\W/ || $name =~ /^[0-9]/)) {
316: &Apache::lonxml::error("Only _ a-z A-Z and 0-9 are allowed in the name to a labelgroup, and the first character can not be a number.<br />");
317: }
1.47 albertel 318: if ($target eq 'web' || $target eq 'tex' ||
319: $target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
320: $Apache::randomlabel::groupname=$name;
321: $Apache::randomlabel::type=$type;
322: @Apache::randomlabel::xcoord = ();
323: @Apache::randomlabel::ycoord = ();
324: @Apache::randomlabel::value = ();
325: @Apache::randomlabel::label_arr = ();
1.68 foxr 326: @Apache::randomlabel::description = ();
1.47 albertel 327: } elsif ($target eq 'edit') {
328: $result.=&Apache::edit::tag_start($target,$token);
329: $result.=&Apache::edit::text_arg('Name:','name',$token).
1.63 albertel 330: &Apache::edit::select_arg('Type:','type',['text','image'],$token);
331: if (!defined($token->[2]{'TeXsize'})) {
332: $token->[2]{'TeXsize'}='\normalsize';
333: }
334: $result.=&Apache::edit::select_arg('TeX font size:','TeXsize',
335: ['\tiny','\scriptsize',
336: '\footnotesize','\small',
337: '\normalsize','\large','\Large',
338: '\LARGE','\huge','\Huge'],
339: $token);
340: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1.47 albertel 341: } elsif ($target eq 'modified') {
342: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.63 albertel 343: $safeeval,'name','type',
344: 'TeXsize');
1.47 albertel 345: if ($constructtag) {
346: $result = &Apache::edit::rebuild_tag($token);
347: $result.=&Apache::edit::handle_insert();
348: }
1.4 albertel 349: }
1.47 albertel 350: return $result;
1.1 tsai 351: }
352:
1.72 foxr 353: #
354: # Utility sub to compute the width of a label.
355: #
356: sub get_label_width {
357: my $label = shift;
358: &Apache::lonxml::debug("image label = $label");
359: if (-e $label) {
360: &Apache::lonxml::debug("$label exists");
361: } else {
362: &Apache::lonxml::debug("$label does not exist");
363: }
364: my $magick = Image::Magick->new;
365: $magick->Read($label);
366: my $pixel_width = $magick->Get('width');
367: return $pixel_width * $scale_factor;
368:
369:
370: }
1.5 albertel 371: sub add_vars {
1.47 albertel 372: my ($name,$order,$label,$labelorder,$value,$image,$safeeval) = @_;
1.61 albertel 373: if (!defined($name) || $name eq '') { return; }
1.47 albertel 374: my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
375: my $out=Apache::run::run($code,$safeeval);
376: if ($value) {
377: $code = '${'.$name."}{'value_".($order+1)."'}='".$value."';";
378: $out=Apache::run::run($code,$safeeval);
379: $code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';";
380: $out=Apache::run::run($code,$safeeval);
381: }
382: if ($image) {
383: my $code = '${'.$name."}{'image_".($order+1)."'}='".$image."';";
384: my $out=Apache::run::run($code,$safeeval);
385: }
386: $code = '${'.$name."}{'numlocations'}='".($order+1)."';";
1.5 albertel 387: $out=Apache::run::run($code,$safeeval);
1.4 albertel 388: }
1.5 albertel 389:
1.1 tsai 390: # begin to assign labels to locations
391: sub end_labelgroup {
1.47 albertel 392: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
393: my $gname = $Apache::randomlabel::groupname;
394: my $type = $Apache::randomlabel::type;
395: my $result='';
396: if ($target eq 'web' || $target eq 'answer' || $target eq 'grade' ||
397: $target eq 'analyze') {
398: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
399: &Apache::structuretags::shuffle(\@idx_arr);
400: for(0 .. $#Apache::randomlabel::label_arr) {
401: my $str;
402: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
403: my $x = $Apache::randomlabel::xcoord[$_];
404: my $y = $Apache::randomlabel::ycoord[$_];
405: my $value = $Apache::randomlabel::value[$_];
1.59 albertel 406: my $i=$Apache::randomlabel::obj_cnt++;
1.47 albertel 407: if( $type eq 'text') {
408: &add_vars($gname,$_,$label,$idx_arr[$_],$value,'',$safeeval);
1.59 albertel 409: $str = join(':',$x,$y,&Apache::lonnet::escape($label));
410: $args{"cgi.$cgi_id.OBJTYPE"}.='LABEL:';
1.47 albertel 411: } elsif ( $type eq 'image') {
412: &add_vars($gname,$_,
413: $Apache::randomlabel::description[$idx_arr[$_]],
414: $idx_arr[$_],$value,$label,$safeeval);
1.59 albertel 415: $str = join(':',$x,$y,&Apache::lonnet::escape($label));
416: $args{"cgi.$cgi_id.OBJTYPE"}.='IMAGE:';
1.47 albertel 417: } else {
418: &Apache::lonxml::error('Unknown type of label :'.$type.':');
419: }
1.59 albertel 420: if ($target eq 'web') { $args{"cgi.$cgi_id.OBJ$i"} =$str; }
1.47 albertel 421: }
422: } elsif ($target eq 'tex') {
423: my $WX1=0; # Web x-coord. of upper left corner (ULC)
424: my $WY1=0; # Web y-coord. of (ULC)
425: my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
426: my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
1.63 albertel 427: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
428: if (!defined($TeXsize)) { $TeXsize='\\normalsize'; }
1.62 albertel 429:
1.47 albertel 430: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
431: &Apache::structuretags::shuffle(\@idx_arr);
432:
433: &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
1.77 ! foxr 434: $Apache::lonxml::debug = 0;
1.47 albertel 435: for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
436: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
437: my $x = $Apache::randomlabel::xcoord[$i];
1.62 albertel 438: # FIXME the 3.5 here is the 'height' of the letter in TeX
439: my $y = $Apache::randomlabel::ycoord[$i]-3.5;
1.77 ! foxr 440: &Apache::lonxml::debug("initially: x= $x y= $y");
1.47 albertel 441: my $value = $Apache::randomlabel::value[$i];
442: #x latex coordinate
1.64 albertel 443: my $tcX=($x)*($width_param/$wwidth);
1.77 ! foxr 444: &Apache::lonxml::debug("wparam = $width_param wwidth = $wwidth, texx = $tcX");
1.47 albertel 445: #y latex coordinate
446: # my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 );
1.64 albertel 447: my $tcY=$height_param-$y*($height_param/$wheight);
1.77 ! foxr 448: &Apache::lonxml::debug("hparam = $height_param wheight = $wheight texy = $tcY");
1.47 albertel 449: $tcX=sprintf('%.2f',$tcX);
450: $tcY=sprintf('%.2f',$tcY);
1.70 foxr 451: $result .= '\put('.$tcX.','.$tcY.'){';
1.47 albertel 452: if( $type eq 'text') {
1.70 foxr 453: $result.= $TeXsize.' \bf '.$label."}\n";
1.47 albertel 454: &add_vars($gname,$i,$label,$idx_arr[$i],$value,'',$safeeval);
455: } elsif ( $type eq 'image') {
1.71 foxr 456: my ($path,$file) = &Apache::londefdef::get_eps_image($label);
457: my $image_name = $path.$file;
1.72 foxr 458: my $label_width = get_label_width($label);
459:
460: $result .= '\includegraphics[width='.$label_width.'mm]{'
1.71 foxr 461: .$image_name."}}\n";
1.47 albertel 462: &add_vars($gname,$i,
463: $Apache::randomlabel::description[$idx_arr[$i]],
464: $idx_arr[$i],$value,$label,$safeeval);
465: } else {
466: &Apache::lonxml::error('Unknown type of label :'.$type.':');
467: }
468: }
1.77 ! foxr 469: $Apache::lonxml::debug =0;
1.47 albertel 470: } elsif ($target eq 'edit') {
471: $result.=&Apache::edit::end_table;
1.3 tsai 472: }
1.47 albertel 473: return $result;
1.1 tsai 474: }
475:
1.5 albertel 476: # <location x="123" y="456" value="some value"/>
1.1 tsai 477: sub start_location {
1.77 ! foxr 478: $Apache::lonxml::debug = 0;
1.47 albertel 479: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
480: my $x= &check_int(&Apache::lonxml::get_param('x',$parstack,$safeeval),50);
481: my $y= &check_int(&Apache::lonxml::get_param('y',$parstack,$safeeval),50);
1.75 foxr 482: &Apache::lonxml::debug("x = $x y = $y");
483: $x = $x*$label_xscale;
484: $y = $y*$label_yscale;
485: &Apache::lonxml::debug(" H = $height_param W = $width_param");
486: &Apache::lonxml::debug(" XS = $label_xscale YS = $label_yscale");
487: &Apache::lonxml::debug(" X = $x Y = $y");
1.47 albertel 488: my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
489: my $result='';
490: push(@Apache::randomlabel::xcoord,$x);
491: push(@Apache::randomlabel::ycoord,$y);
492: push(@Apache::randomlabel::value,$value);
493: if ($target eq 'edit') {
494: $result.=&Apache::edit::tag_start($target,$token);
495: $result.=&Apache::edit::text_arg('X:','x',$token,4).
496: &Apache::edit::text_arg('Y:','y',$token,4).
497: &Apache::edit::entercoords('x','y','attribute','width','height').' '.
498: &Apache::edit::text_arg('Value:','value',$token).
499: &Apache::edit::end_row();
500: $result.=&Apache::edit::end_table;
501: } elsif ($target eq 'modified') {
502: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
503: $safeeval,'x','y','value');
504: if ($constructtag) {
505: $result = &Apache::edit::rebuild_tag($token);
506: $result.=&Apache::edit::handle_insert();
507: }
1.4 albertel 508: }
1.77 ! foxr 509: $Apache::lonxml::debug = 0;
1.47 albertel 510: return $result;
1.1 tsai 511: }
512:
513: sub end_location {
1.47 albertel 514: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
515: my @result;
516: if ($target eq 'edit') { @result=('','no') }
517: return @result;
1.1 tsai 518: }
519:
1.2 tsai 520: # <label>$var_abc</label>
1.1 tsai 521: sub start_label {
1.47 albertel 522: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
523: my $result='';
524: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
525: if ($target eq 'web' || $target eq 'tex' ||
526: $target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
1.57 albertel 527: &Apache::lonxml::startredirection;
1.47 albertel 528: } elsif ($target eq 'edit') {
529: $result.=&Apache::edit::tag_start($target,$token,"$type Label");
530: my $text=&Apache::lonxml::get_all_text("/label",$parser);
531: if ($type eq 'image') {
532: $result.=&Apache::edit::end_row().
533: &Apache::edit::start_spanning_row();
534: $result.=&Apache::edit::text_arg('Description:','description',
535: $token);
536: }
537: if ($type eq 'text') { $result.="Label Text:"; }
538: if ($type eq 'image') { $result.="Path to image: "; }
539: $result.=&Apache::edit::editline('',$text,'',50).
540: &Apache::edit::end_table();
541: } elsif ($target eq 'modified') {
542: $result = '<label>';
543: if ($type eq 'image') {
544: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
545: $safeeval,
546: 'description');
547: if ($constructtag) {
548: $result = &Apache::edit::rebuild_tag($token);
549: } else {
550: $result = $token->[4];
551: }
552: }
1.52 albertel 553: $result.=&Apache::edit::modifiedfield("/label",$parser);
1.26 albertel 554: }
1.47 albertel 555: return $result;
1.1 tsai 556: }
557:
558: sub end_label {
1.47 albertel 559: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
560: my @result;
1.57 albertel 561: if ($target eq 'edit') {
562: @result=('','no') ;
563: } elsif ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
564: $target eq 'answer' || $target eq 'analyze') {
565: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
566: my $ltext=&Apache::lonxml::endredirection;
567: if ($type eq 'image') {
1.70 foxr 568: if ($target eq 'tex') {
569: # For tex targets, our image url has been potentially corrupted
570: # by prepending \'s in front of special latex symbols.
571: # For now we only worry about the _ case (most common?)
572: # There's a whole host of theim in lonxml::latex_special_symbols
573: # that could potentially have to be re-done.
574:
575: $ltext =~ s/\\_/_/g;
576: }
1.57 albertel 577: &Apache::lonxml::debug("Turning $ltext, $Apache::lonxml::pwd[-1]");
578: $ltext=&Apache::imageresponse::clean_up_image($ltext);
579: # $ltext=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],
580: # $ltext);
581: &Apache::lonxml::debug("into $ltext");
582: my $description = &Apache::lonxml::get_param('description',
583: $parstack,$safeeval);
584: push(@Apache::randomlabel::description,$description);
1.61 albertel 585: } else {
586: $ltext=~s/[\r\n]*//gs
1.57 albertel 587: }
588: push(@Apache::randomlabel::label_arr,$ltext);
589: }
1.47 albertel 590: return @result;
1.1 tsai 591: }
592:
593: 1;
594: __END__
595:
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