Annotation of loncom/homework/randomlabel.pm, revision 1.95

1.1       tsai        1: # The LearningOnline Network with CAPA
                      2: # random labelling tool
1.8       albertel    3: #
1.95    ! raeburn     4: # $Id: randomlabel.pm,v 1.94 2008/12/19 14:28:14 raeburn 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/
1.93      jms        27: 
                     28: =pod
                     29: 
                     30: =head1 NAME
                     31: 
                     32: Apache::randomlable.pm
                     33: 
                     34: =head1 SYNOPSIS
                     35: 
                     36: Interface for producing applet code which
                     37: randomizes the labelling of an image.
                     38: 
                     39: This is part of the LearningOnline Network with CAPA project
                     40: described at http://www.lon-capa.org.
                     41: 
                     42: 
                     43: =head1 SYNTAX
                     44: 
                     45:  <randomlabel bgimg="URL" width="12" height="45" texwidth="50">
                     46:     <labelgroup name="GroupOne" type="image">
                     47:       <location x="123" y="456" />
                     48:       <location x="321" y="654" />
                     49:       <location x="213" y="546" />
                     50:       <label description="TEXT-1">IMG-URL</label>
                     51:       <label description="TEXT-2">IMG-URL</label>
                     52:       <label description="TEXT-3">IMG-URL</label>
                     53:     </labelgroup>
                     54:     <labelgroup name="GroupTwo" type="text">
                     55:       <location x="12" y="45" />
                     56:       <location x="32" y="65" />
                     57:       <location x="21" y="54" />
                     58:       <label>TEXT-1</label>
                     59:       <label>TEXT-2</label>
                     60:       <label>TEXT-3</label>
                     61:     </labelgroup>
                     62:    </randomlabel>
                     63:   ===========================================
                     64:   side effect:
                     65:     location (123,456): $GroupOne[0] = 2   images give out indexes
                     66:              (321,654): $GroupOne[1] = 1
                     67:              (213,546): $GroupOne[2] = 0
                     68:     location (12,45)  : $GroupTwo[0] = "TEXT-3"
                     69:              (32,65)  : $GroupTwo[1] = "TEXT-1"
                     70:              (21,54)  : $GroupTwo[2] = "TEXT-2"
                     71:   ===========================================
                     72: 
                     73: 
                     74: =head1 NOTABLE SUBROUTINES
                     75: 
                     76: =over
                     77: 
                     78: =item check_int()
                     79: 
                     80: 	utility function to do error checking on a integer.
                     81: 
                     82: =item extract_tag_sizes()
                     83: 
                     84: Parameters:
                     85:       tag         - tag potentially containing height/width attributes.
                     86:       def_width   - Default width.
                     87:       def_height  - Default height.
                     88:   Returns:
                     89:       list containing width/height.
                     90: 
                     91: =item get_label_width()
                     92: 
                     93: 	 Utility sub to compute the width of a label.
                     94: 	 
                     95: =item end_labelgroup()
                     96: 
                     97: begin to assign labels to locations
                     98: 
                     99: =back
                    100: 
                    101: =cut
                    102: 
                    103: 
1.92      jms       104: 
1.1       tsai      105: package Apache::randomlabel;
1.24      sakharuk  106: use Apache::lonnet;
1.1       tsai      107: use strict;
1.13      sakharuk  108: use Apache::edit;
1.36      sakharuk  109: use Apache::File();
1.38      sakharuk  110: use Apache::Constants qw(:common :http);
1.72      foxr      111: use Image::Magick;
1.73      foxr      112: use Apache::lonplot;
1.82      www       113: use LONCAPA;
                    114:  
1.1       tsai      115: 
1.53      albertel  116: my %args;
                    117: my $cgi_id;
1.73      foxr      118: my $scale_factor;		# image scale factor.
1.75      foxr      119: my $label_xscale;                # Label scale factor (needed for gnuplot).
                    120: my $label_yscale;
1.87      foxr      121: my $dirty_width_adjust = 5;     # Width adjustment for e.g. gnuplot images.
1.76      foxr      122: 
1.13      sakharuk  123: BEGIN {
1.57      albertel  124:     &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label','bgimg'));
1.1       tsai      125: }
                    126: 
1.77      foxr      127: 
1.76      foxr      128: 
1.23      matthew   129: sub check_int {
                    130:     # utility function to do error checking on a integer.
                    131:     my ($num,$default) = @_;
                    132:     $default = 100 if (! defined($default));
                    133:     $num =~ s/\s+//g;  # We dont need no stinkin white space!
                    134:     # If it is a real, just grab the integer part.
                    135:     ($num,undef) = split (/\./,$num) if ($num =~ /\./); 
                    136:     # set to default if what we have left doesn't match anything...
                    137:     $num = $default unless ($num =~/^\d+$/);
                    138:     return $num;
                    139: }
                    140: 
1.93      jms       141: 
                    142: 
1.77      foxr      143: sub extract_tag_sizes {
                    144:     my ($tag, $dw, $dh) = @_;
                    145:     $tag =~ s/\s+/ /g;         # Collapse whitespace.
                    146:     $tag =~ s/\s*=\s*/=/g;     # kill space around ='s.
                    147:     $tag =~ s/[<>\"]//g;       # Get rid of the <">'s too.
                    148: 
                    149:     &Apache::lonxml::debug("Compressed tag: $tag");
                    150:     my @taglist = split(/ /,$tag);
                    151:     foreach my $attribute (@taglist) {
                    152: 	if ($attribute =~ /^width/i) {
                    153: 	    my ($e, $s)= split(/=/,$attribute);
                    154: 	    $dw = $s;
                    155: 	}
                    156: 	if ($attribute =~  /^height/i) {
                    157: 	    my ($e, $s) = split(/=/,$attribute);
                    158: 	    $dh = $s;
                    159: 	}
                    160:     } 
                    161:     return($dw, $dh);
                    162: 
                    163: }
                    164: 
1.64      albertel  165: my ($height_param,$width_param);
1.1       tsai      166: sub start_randomlabel {
1.76      foxr      167: 
1.47      albertel  168:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    169:     my $result='';
                    170:     push (@Apache::lonxml::namespace,'randomlabel');
1.64      albertel  171:     ($height_param,$width_param)=(0,0);
1.75      foxr      172:     $label_xscale = 1.0;		# Assume image size not overridden.
                    173:     $label_yscale = 1.0;
1.47      albertel  174:     my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
1.94      raeburn   175:     if ( defined($bgimg) && $bgimg !~ /^https?\:/ ) {
1.47      albertel  176: 	$bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);
1.66      raeburn   177: 	if (&Apache::lonnet::repcopy($bgimg) ne 'ok') {
1.47      albertel  178: 	    $bgimg='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
                    179: 	}
1.42      www       180:     }
1.59      albertel  181:     $Apache::randomlabel::obj_cnt=0;
1.47      albertel  182:     if ($target eq 'web') {
1.53      albertel  183: 	$cgi_id=&Apache::loncommon::get_cgi_id();
                    184: 	%args=();
1.82      www       185: 	$args{"cgi.$cgi_id.BGIMG"}=&escape($bgimg);
1.75      foxr      186: 	$height_param = &Apache::lonxml::get_param('height',$parstack, $safeeval);
                    187: 	$width_param  = &Apache::lonxml::get_param('width', $parstack, $safeeval);
1.64      albertel  188:     } elsif ($target eq 'tex' && defined($bgimg)) {
                    189: 	$result.=&make_eps_image($bgimg,$parstack,$safeeval);
1.47      albertel  190:     } elsif ($target eq 'edit') {
1.89      banghart  191:         my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
1.47      albertel  192: 	$result.=&Apache::edit::tag_start($target,$token);
                    193: 	$Apache::edit::bgimgsrc=
                    194: 	    &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
                    195: 	$Apache::edit::bgimgsrccurdepth=$Apache::lonxml::curdepth;
                    196: 	$result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).' ';
1.89      banghart  197: 	$result.=&Apache::edit::browse('bgimg',undef,undef,$only).' ';
1.47      albertel  198: 	$result.=&Apache::edit::search('bgimg').'<br />'.
                    199: 	    &Apache::edit::text_arg('Width(pixel):' ,'width'   ,$token,6).
                    200: 	    &Apache::edit::text_arg('Height(pixel):','height'  ,$token,6).
                    201: 	    &Apache::edit::text_arg('TeXWidth(mm):' ,'texwidth',$token,6).
                    202: 	    &Apache::edit::end_row().&Apache::edit::start_spanning_row();     
                    203:     } elsif ($target eq 'modified') {
                    204: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    205: 						     $safeeval,'bgimg','width',
                    206: 						     'height','texwidth');
                    207: 	if ($constructtag) {
                    208: 	    $result = &Apache::edit::rebuild_tag($token);
                    209: 	}
1.31      sakharuk  210:     }
1.47      albertel  211:     return $result;
1.1       tsai      212: }
                    213: 
                    214: sub end_randomlabel {
1.47      albertel  215:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    216:     my $result='';
                    217:     my $count;
                    218:     pop @Apache::lonxml::namespace;
                    219:     if ($target eq 'web') {
1.59      albertel  220: 	$count = $Apache::randomlabel::obj_cnt;
                    221: 	if( $count != 0) { $args{"cgi.$cgi_id.OBJCOUNT"}=$count; }
1.53      albertel  222: 	$result.='<img src="/adm/randomlabel.png?token='.$cgi_id.'" /><br />'."\n";
1.91      raeburn   223: 	&Apache::lonnet::appenv(\%args);
1.47      albertel  224:     } elsif ($target eq 'tex') {
                    225: 	$result='\end{picture}\\\\';
1.95    ! raeburn   226: 	$result.= ' \vskip -'.$height_param.' mm } \\newline ';
1.47      albertel  227:     } elsif ($target eq 'edit') {
                    228: 	$result.=&Apache::edit::end_table;
                    229:     }
                    230:     return $result;
1.1       tsai      231: }
                    232: 
1.77      foxr      233: 
1.57      albertel  234: sub start_bgimg {
                    235:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    236:     my $result='';
                    237:     if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { 
1.64      albertel  238: 	&Apache::lonxml::startredirection(); 
1.57      albertel  239:     }
                    240:     return $result;
                    241: }
                    242: 
                    243: sub end_bgimg {
                    244:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    245:     my $result='';
                    246:     if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { 
1.64      albertel  247: 	my $bgimg=&Apache::lonxml::endredirection(); 
1.57      albertel  248: 	if ($target eq 'web') {
1.77      foxr      249: 	    
                    250: 	    # If the  tag produced has sizes, they override ours.
                    251: 	    # (for now anyway).
                    252: 	    #
                    253: 	    &Apache::lonxml::debug("Base sizes: $width_param x $height_param");
                    254: 	
                    255: 	    my ($plot_x, $plot_y) = &extract_tag_sizes($bgimg, 
                    256: 						       $width_param,
1.78      albertel  257: 						       $height_param);
1.77      foxr      258: 	    &Apache::lonxml::debug("Extracted sizes: $plot_x x $plot_y");
1.78      albertel  259: 	    if ($width_param) {
                    260: 		$label_xscale     = $plot_x / $width_param;
                    261: 	    }
                    262: 	    if ($height_param) {
                    263: 		$label_yscale     = $plot_y / $height_param;
                    264: 	    }
1.77      foxr      265: 	    &Apache::lonxml::debug("Scale factors:   $label_xscale $label_yscale");
                    266: 
1.75      foxr      267: 	    &Apache::lonxml::debug("Image: $bgimg");
1.57      albertel  268: 	    $bgimg=&Apache::imageresponse::clean_up_image($bgimg);
1.75      foxr      269: 	    &Apache::lonxml::debug("Cleaned image: $bgimg");
1.82      www       270: 	    $args{"cgi.$cgi_id.BGIMG"}=&escape($bgimg);
1.57      albertel  271: 	} elsif ($target eq 'tex') {
1.73      foxr      272: 	    #   Some bg images can create latex for us... e.g. gnuplot.
                    273: 	    #   If it looks like we have some latex use that, 
                    274: 	    #   otherwise, assume this is a resource name that must
                    275: 	    #   be converted into the latex to create an eps insertion.
                    276: 	    #
                    277: 	    my $src = $bgimg;
                    278: 	    $src =~ s/\s+$//s;
                    279: 	    $src =~ s/^\s+//s;
                    280: 
1.77      foxr      281: 	    #If this is a dynamically generated image, it will
                    282: 	    #be in latex already, with a comment header that
                    283: 	    #describes the dimensions:
                    284: 
                    285: 	    if($src =~ /^%DYNAMICIMAGE:/) {
                    286: 		$Apache::lonxml::debug = 0;
                    287: 		&Apache::lonxml::debug("Dynamic image");
                    288: 		my ($commentline, $junk) = split(/\n/, $src);
                    289: 		&Apache::lonxml::debug("Comment line was: $commentline");
                    290: 		my $trash;
                    291: 		my $initial_width;
                    292: 		($trash, $initial_width, $height_param, $width_param) =
                    293: 		    split(/:/,$commentline);
                    294: 		&Apache::lonxml::debug("internal web Width/height: $initial_width $height_param");
                    295: 		&Apache::lonxml::debug("Texwitdh: $width_param");
                    296: 		if($initial_width == 0) {
                    297: 		    $initial_width = $width_param;
                    298: 		}
                    299: 		# strip off the comments since output does not always
                    300: 		# preserve \n's:
                    301:                 #
                    302: 		$src =~ s/$commentline//;
1.74      foxr      303: 		$scale_factor = $width_param / $initial_width;
                    304: 		$height_param = $height_param*$scale_factor;
1.77      foxr      305: 
                    306: 		$label_xscale = 1.0; #  $scale_factor;
                    307: 		$label_yscale = 1.0; #  $scale_factor;
                    308: 	   
1.73      foxr      309: 		&Apache::lonxml::debug("height $height_param");
                    310: 		&Apache::lonxml::debug("Width $width_param");
1.77      foxr      311: 		&Apache::lonxml::debug("Scale factors: $label_xscale $label_yscale");
1.87      foxr      312: 		my $dirty_width = $width_param + $dirty_width_adjust;
                    313: 		my $x_offset    = -$dirty_width_adjust/2.0;
1.86      foxr      314: 		#
                    315: 		#  Somewhere here it looks like height_param and
                    316: 		#  width_param got backwards...
                    317: 		#
1.73      foxr      318: 		$result .= '\parbox{'.$dirty_width.'mm}{';
1.77      foxr      319: 		$result  .= " $src \n";
1.74      foxr      320: 		$result  .= '\setlength{\unitlength}{1mm}'."\n";
1.87      foxr      321: 		$result  .= '\begin{picture}('."$width_param,$height_param)";
                    322: 		$result  .= "($x_offset,-$height_param)";
1.74      foxr      323: 		$result  .= "\n";
1.77      foxr      324: 		$Apache::lonxml::debug = 0;
1.74      foxr      325: 
1.73      foxr      326: 	    } else {
                    327: 		$result.=&make_eps_image($bgimg,$parstack,$safeeval,-2);
                    328: 	    }
1.57      albertel  329: 	}
                    330:     }
                    331:     return $result;
                    332: }
                    333: sub make_eps_image {
1.64      albertel  334:     my ($bgimg,$parstack,$safeeval,$depth)=@_;
1.73      foxr      335:     &Apache::lonxml::debug("image prior to get_eps_image: $bgimg");
1.64      albertel  336:     my ($path,$file) = &Apache::londefdef::get_eps_image($bgimg);
1.73      foxr      337:     &Apache::lonxml::debug("image after:  $bgimg");
1.64      albertel  338:     ($height_param,$width_param)=
                    339: 	&Apache::londefdef::image_size($bgimg,0.3,$parstack,$safeeval,
                    340: 				       $depth,1);
1.73      foxr      341: 
                    342:     &Apache::lonxml::debug("Image size: $height_param x $width_param");
                    343: 
1.64      albertel  344:     my $dirtywidth=$width_param+5;
1.83      foxr      345: 
1.68      foxr      346:     my $result ="\n".'\vspace*{2mm}\noindent'."\n".
                    347: 	'\parbox{'.$dirtywidth.
1.64      albertel  348: 	' mm}{  \noindent \epsfxsize='.$width_param.
1.85      albertel  349: 	' mm \epsffile{'.$path.$file.
1.68      foxr      350: 	'}\setlength{\unitlength}{1mm}'."\n".'  \begin{picture}('.
                    351: 	$width_param.','.$height_param.')(0,-'.$height_param.')'."\n";
1.72      foxr      352:     my $magick = Image::Magick->new;
                    353:     $magick->Read($bgimg);
                    354:     my $initial_width = $magick->Get('width');
1.73      foxr      355:     &Apache::lonxml::debug("ImageMagick thinks width is; $initial_width");
1.72      foxr      356:     $scale_factor = $width_param / $initial_width;
1.57      albertel  357:     return $result;
                    358: }
                    359: 
1.1       tsai      360: sub start_labelgroup {
1.47      albertel  361:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    362:     my $result='';
                    363:     my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
                    364:     my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
                    365:     $type =~tr/A-Z/a-z/;
1.48      albertel  366:     if ($target ne 'modified' && ($name =~ /\W/ || $name =~ /^[0-9]/)) {
                    367: 	&Apache::lonxml::error("Only _ a-z A-Z and 0-9 are allowed in the name to a labelgroup, and the first character can not be a number.<br />");
                    368:     }
1.47      albertel  369:     if ($target eq 'web' || $target eq 'tex' ||
                    370: 	$target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
                    371: 	$Apache::randomlabel::groupname=$name;
                    372: 	$Apache::randomlabel::type=$type;
                    373: 	@Apache::randomlabel::xcoord = ();
                    374: 	@Apache::randomlabel::ycoord = ();
                    375: 	@Apache::randomlabel::value = ();
                    376: 	@Apache::randomlabel::label_arr  = ();
1.68      foxr      377: 	@Apache::randomlabel::description  = ();
1.47      albertel  378:     } elsif ($target eq 'edit') {
                    379: 	$result.=&Apache::edit::tag_start($target,$token);
                    380: 	$result.=&Apache::edit::text_arg('Name:','name',$token).
1.63      albertel  381: 	    &Apache::edit::select_arg('Type:','type',['text','image'],$token);
                    382: 	if (!defined($token->[2]{'TeXsize'})) {
                    383: 	    $token->[2]{'TeXsize'}='\normalsize';
                    384: 	}
                    385: 	$result.=&Apache::edit::select_arg('TeX font size:','TeXsize',
                    386: 					   ['\tiny','\scriptsize',
                    387: 					    '\footnotesize','\small',
                    388: 					    '\normalsize','\large','\Large',
                    389: 					    '\LARGE','\huge','\Huge'],
                    390: 					   $token);
                    391: 	$result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1.47      albertel  392:     } elsif ($target eq 'modified') {
                    393: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.63      albertel  394: 						     $safeeval,'name','type',
                    395: 						     'TeXsize');
1.47      albertel  396: 	if ($constructtag) {
                    397: 	    $result = &Apache::edit::rebuild_tag($token);
                    398: 	}
1.4       albertel  399:     }
1.47      albertel  400:     return $result;
1.1       tsai      401: }
                    402: 
1.93      jms       403: 
                    404: 
1.72      foxr      405: sub get_label_width {
                    406:     my $label         = shift;
                    407:     &Apache::lonxml::debug("image label = $label");
                    408:     if (-e $label) {
                    409: 	&Apache::lonxml::debug("$label exists");
                    410:     } else {
                    411: 	&Apache::lonxml::debug("$label does not exist");
                    412:     }
                    413:     my $magick        = Image::Magick->new;
                    414:     $magick->Read($label);
                    415:     my $pixel_width   = $magick->Get('width');
                    416:     return $pixel_width * $scale_factor;
                    417:     
                    418: 	
                    419: }
1.79      albertel  420: 
                    421: sub get_label_height {
                    422:     my $label         = shift;
                    423:     &Apache::lonxml::debug("image label = $label");
                    424:     if (-e $label) {
                    425: 	&Apache::lonxml::debug("$label exists");
                    426:     } else {
                    427: 	&Apache::lonxml::debug("$label does not exist");
                    428:     }
                    429:     my $magick        = Image::Magick->new;
                    430:     $magick->Read($label);
                    431:     my $pixel_height   = $magick->Get('height');
                    432:     return $pixel_height * $scale_factor;
                    433: }
                    434: 
1.5       albertel  435: sub add_vars {
1.47      albertel  436:     my ($name,$order,$label,$labelorder,$value,$image,$safeeval) = @_;
1.61      albertel  437:     if (!defined($name) || $name eq '') { return; }
1.47      albertel  438:     my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
                    439:     my $out=Apache::run::run($code,$safeeval);
                    440:     if ($value) {
                    441: 	$code = '${'.$name."}{'value_".($order+1)."'}='".$value."';";
                    442: 	$out=Apache::run::run($code,$safeeval);
                    443: 	$code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';";
                    444: 	$out=Apache::run::run($code,$safeeval);
                    445:     }
                    446:     if ($image) {
                    447: 	my $code = '${'.$name."}{'image_".($order+1)."'}='".$image."';";
                    448: 	my $out=Apache::run::run($code,$safeeval);
                    449:     }
                    450:     $code = '${'.$name."}{'numlocations'}='".($order+1)."';";
1.5       albertel  451:     $out=Apache::run::run($code,$safeeval);
1.4       albertel  452: }
1.5       albertel  453: 
1.93      jms       454: 
                    455: 
1.1       tsai      456: sub end_labelgroup {
1.47      albertel  457:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    458:     my $gname = $Apache::randomlabel::groupname;
                    459:     my $type  = $Apache::randomlabel::type;
                    460:     my $result='';
                    461:     if ($target eq 'web' || $target eq 'answer' || $target eq 'grade' ||
                    462: 	$target eq 'analyze') {
                    463: 	my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
                    464: 	&Apache::structuretags::shuffle(\@idx_arr);
                    465: 	for(0 .. $#Apache::randomlabel::label_arr) {
                    466: 	    my $str;
                    467: 	    my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
                    468: 	    my $x = $Apache::randomlabel::xcoord[$_];
                    469: 	    my $y = $Apache::randomlabel::ycoord[$_];
                    470: 	    my $value = $Apache::randomlabel::value[$_];
1.59      albertel  471: 	    my $i=$Apache::randomlabel::obj_cnt++;
1.47      albertel  472: 	    if( $type eq 'text') {
                    473: 		&add_vars($gname,$_,$label,$idx_arr[$_],$value,'',$safeeval);
1.82      www       474: 		$str = join(':',$x,$y,&escape($label));
1.59      albertel  475: 		$args{"cgi.$cgi_id.OBJTYPE"}.='LABEL:';
1.47      albertel  476: 	    } elsif ( $type eq 'image') {
                    477: 		&add_vars($gname,$_,
                    478: 			  $Apache::randomlabel::description[$idx_arr[$_]],
                    479: 			  $idx_arr[$_],$value,$label,$safeeval);
1.82      www       480: 		$str = join(':',$x,$y,&escape($label));
1.59      albertel  481: 		$args{"cgi.$cgi_id.OBJTYPE"}.='IMAGE:';
1.47      albertel  482: 	    } else {
                    483: 		&Apache::lonxml::error('Unknown type of label :'.$type.':');
                    484: 	    }
1.59      albertel  485: 	    if ($target eq 'web') { $args{"cgi.$cgi_id.OBJ$i"} =$str; }
1.47      albertel  486: 	}
                    487:     } elsif ($target eq 'tex') {
                    488: 	my $WX1=0; #  Web x-coord. of upper left corner (ULC)
                    489: 	my $WY1=0; #  Web y-coord. of (ULC)
                    490: 	my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
                    491: 	my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
1.63      albertel  492: 	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
                    493: 	if (!defined($TeXsize)) { $TeXsize='\\normalsize'; }
1.62      albertel  494: 	
1.47      albertel  495: 	my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
                    496: 	&Apache::structuretags::shuffle(\@idx_arr);
                    497: 
                    498: 	&Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
1.77      foxr      499: 	$Apache::lonxml::debug = 0;
1.47      albertel  500: 	for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
                    501: 	    my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
                    502: 	    my $x = $Apache::randomlabel::xcoord[$i];
1.80      albertel  503: 	    my $y = $Apache::randomlabel::ycoord[$i];
                    504: 	    if ( $type eq 'text' ) {
                    505: 		# FIXME the 3.5 here is the 'height' of the letter in TeX
                    506: 		$y=$y-3.5;
                    507: 	    }
1.77      foxr      508: 	    &Apache::lonxml::debug("initially: x= $x y= $y");
1.47      albertel  509: 	    my $value = $Apache::randomlabel::value[$i];
                    510: 	    #x latex coordinate
1.64      albertel  511: 	    my $tcX=($x)*($width_param/$wwidth);
1.77      foxr      512: 	    &Apache::lonxml::debug("wparam = $width_param wwidth = $wwidth, texx = $tcX");
1.47      albertel  513: 	    #y latex coordinate
                    514:             #      my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 );
1.64      albertel  515: 	    my $tcY=$height_param-$y*($height_param/$wheight);
1.79      albertel  516: 	    if ( $type eq 'image') {
                    517: 		my $label_height = &get_label_height($label);
                    518: 		$tcY=$tcY-$label_height;
                    519: 	    }
                    520: 
1.77      foxr      521: 	    &Apache::lonxml::debug("hparam = $height_param wheight = $wheight texy = $tcY");
1.47      albertel  522: 	    $tcX=sprintf('%.2f',$tcX);
                    523: 	    $tcY=sprintf('%.2f',$tcY);
1.70      foxr      524: 	    $result .= '\put('.$tcX.','.$tcY.'){';
1.47      albertel  525: 	    if( $type eq 'text') {
1.70      foxr      526: 		$result.= $TeXsize.' \bf '.$label."}\n";
1.47      albertel  527: 		&add_vars($gname,$i,$label,$idx_arr[$i],$value,'',$safeeval);
                    528: 	    } elsif ( $type eq 'image') {
1.71      foxr      529: 		my ($path,$file) = &Apache::londefdef::get_eps_image($label);
                    530: 		my $image_name = $path.$file;
1.83      foxr      531: 		#
                    532: 		#  Note that spaces in e.. \includegraphics cause problems for Latex
                    533: 		# so they get replaced by _'s by lonprintout/printout and us:
                    534: 		#
1.79      albertel  535: 		my $label_width = &get_label_width($label);
1.72      foxr      536: 
                    537: 		$result .=  '\includegraphics[width='.$label_width.'mm]{'
1.71      foxr      538: 		            .$image_name."}}\n";
1.47      albertel  539: 		&add_vars($gname,$i,
                    540: 			  $Apache::randomlabel::description[$idx_arr[$i]],
                    541: 			  $idx_arr[$i],$value,$label,$safeeval);
                    542: 	    } else {
                    543: 		&Apache::lonxml::error('Unknown type of label :'.$type.':');
                    544: 	    }
                    545: 	}
1.77      foxr      546: 	$Apache::lonxml::debug =0;
1.47      albertel  547:     } elsif ($target eq 'edit') {
                    548: 	$result.=&Apache::edit::end_table;
1.3       tsai      549:     }
1.47      albertel  550:     return $result;
1.1       tsai      551: }
                    552: 
1.5       albertel  553: # <location x="123" y="456" value="some value"/>
1.1       tsai      554: sub start_location {
1.77      foxr      555:     $Apache::lonxml::debug = 0;
1.47      albertel  556:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    557:     my $x= &check_int(&Apache::lonxml::get_param('x',$parstack,$safeeval),50);
                    558:     my $y= &check_int(&Apache::lonxml::get_param('y',$parstack,$safeeval),50);
1.75      foxr      559:     &Apache::lonxml::debug("x = $x y = $y");
                    560:     $x = $x*$label_xscale;
                    561:     $y = $y*$label_yscale;
                    562:     &Apache::lonxml::debug(" H = $height_param W = $width_param");
                    563:     &Apache::lonxml::debug(" XS = $label_xscale YS = $label_yscale");
                    564:     &Apache::lonxml::debug(" X  = $x Y = $y");
1.47      albertel  565:     my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
                    566:     my $result='';
                    567:     push(@Apache::randomlabel::xcoord,$x);
                    568:     push(@Apache::randomlabel::ycoord,$y);
                    569:     push(@Apache::randomlabel::value,$value);
                    570:     if ($target eq 'edit') {
                    571: 	$result.=&Apache::edit::tag_start($target,$token);
                    572: 	$result.=&Apache::edit::text_arg('X:','x',$token,4).
                    573: 	    &Apache::edit::text_arg('Y:','y',$token,4).
                    574: 	    &Apache::edit::entercoords('x','y','attribute','width','height').'&nbsp;&nbsp;&nbsp;'.
                    575: 	    &Apache::edit::text_arg('Value:','value',$token).
                    576: 	    &Apache::edit::end_row();
                    577: 	$result.=&Apache::edit::end_table;
                    578:     } elsif ($target eq 'modified') {
                    579: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    580: 						    $safeeval,'x','y','value');
                    581: 	if ($constructtag) {
                    582: 	    $result = &Apache::edit::rebuild_tag($token);
                    583: 	}
1.4       albertel  584:     }
1.77      foxr      585:     $Apache::lonxml::debug = 0;
1.47      albertel  586:     return $result;
1.1       tsai      587: }
                    588: 
                    589: sub end_location {
1.47      albertel  590:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    591:     my @result;
                    592:     if ($target eq 'edit') { @result=('','no') }
                    593:     return @result;
1.1       tsai      594: }
                    595: 
1.2       tsai      596: # <label>$var_abc</label>
1.90      albertel  597: sub insert_label {
                    598:     my ($after) = @_;
                    599:     my $depth = scalar(@Apache::lonxml::depthcounter);
                    600:     $depth-- if ($after);
                    601:     my $inset = "\t"x$depth;
                    602:     return "\n$inset<label></label>";
                    603: }
                    604: 
1.1       tsai      605: sub start_label {
1.47      albertel  606:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    607:     my $result='';
                    608:     my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
                    609:     if ($target eq 'web' || $target eq 'tex' ||
                    610: 	$target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
1.57      albertel  611: 	&Apache::lonxml::startredirection; 
1.47      albertel  612:     } elsif ($target eq 'edit') {
                    613: 	$result.=&Apache::edit::tag_start($target,$token,"$type Label");
1.81      albertel  614: 	my $text=&Apache::lonxml::get_all_text("/label",$parser,$style);
1.47      albertel  615: 	if ($type eq 'image') {
                    616: 	    $result.=&Apache::edit::end_row().
                    617: 		&Apache::edit::start_spanning_row();
                    618: 	    $result.=&Apache::edit::text_arg('Description:','description',
                    619: 					     $token);
                    620: 	}
                    621: 	if ($type eq 'text') { $result.="Label Text:"; }
                    622: 	if ($type eq 'image') { $result.="Path to image:&nbsp;"; }
                    623: 	$result.=&Apache::edit::editline('',$text,'',50).
                    624: 	    &Apache::edit::end_table();
                    625:     } elsif ($target eq 'modified') {
                    626: 	$result = '<label>';
                    627: 	if ($type eq 'image') {
                    628: 	    my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    629: 							 $safeeval,
                    630: 							 'description');
                    631: 	    if ($constructtag) {
                    632: 		$result = &Apache::edit::rebuild_tag($token);
                    633: 	    } else {
                    634: 		$result = $token->[4];
                    635: 	    }
                    636: 	}
1.52      albertel  637: 	$result.=&Apache::edit::modifiedfield("/label",$parser);
1.26      albertel  638:     }
1.47      albertel  639:     return $result;
1.1       tsai      640: }
                    641: 
                    642: sub end_label {
1.47      albertel  643:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    644:     my @result;
1.57      albertel  645:     if ($target eq 'edit') {
                    646: 	@result=('','no') ;
                    647:     } elsif ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
                    648: 	     $target eq 'answer' || $target eq 'analyze') {
                    649: 	my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
                    650: 	my $ltext=&Apache::lonxml::endredirection; 
                    651: 	if ($type eq 'image') {
1.70      foxr      652: 	    if ($target eq 'tex') {
                    653: 		# For tex targets, our image url has been potentially corrupted
                    654: 		# by prepending \'s in front of special latex symbols.
                    655: 		# For now we only worry about the _ case (most common?)
                    656: 		# There's a whole host of theim in lonxml::latex_special_symbols
                    657: 		# that could potentially have to be re-done.
                    658: 
                    659: 		$ltext =~ s/\\_/_/g;
                    660: 	    }
1.57      albertel  661: 	    &Apache::lonxml::debug("Turning $ltext, $Apache::lonxml::pwd[-1]");
                    662: 	    $ltext=&Apache::imageresponse::clean_up_image($ltext);
                    663: #	    $ltext=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],
                    664: #						 $ltext);
                    665: 	    &Apache::lonxml::debug("into $ltext");
                    666: 	    my $description = &Apache::lonxml::get_param('description',
                    667: 							 $parstack,$safeeval);
                    668: 	    push(@Apache::randomlabel::description,$description);
1.61      albertel  669: 	} else {
                    670: 	    $ltext=~s/[\r\n]*//gs
1.57      albertel  671: 	}
                    672: 	push(@Apache::randomlabel::label_arr,$ltext);
                    673:     }
1.47      albertel  674:     return @result;
1.1       tsai      675: }
                    676: 
                    677: 1;
                    678: __END__
                    679:  

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