--- loncom/homework/randomlabel.pm 2002/03/08 20:43:06 1.19 +++ loncom/homework/randomlabel.pm 2008/12/21 15:10:12 1.91.2.1 @@ -1,7 +1,7 @@ # The LearningOnline Network with CAPA # random labelling tool # -# $Id: randomlabel.pm,v 1.19 2002/03/08 20:43:06 albertel Exp $ +# $Id: randomlabel.pm,v 1.91.2.1 2008/12/21 15:10:12 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # @@ -25,9 +25,6 @@ # # http://www.lon-capa.org/ # -# 7/20/2001 Isaac Tsai, initial syntax -# 8/10/2001 Isaac Tsai, -# 8/30/2001 Isaac Tsai, # SYNTAX: # # @@ -57,285 +54,584 @@ # (21,54) : $GroupTwo[2] = "TEXT-2" # =========================================== package Apache::randomlabel; +use Apache::lonnet; use strict; use Apache::edit; +use Apache::File(); +use Apache::Constants qw(:common :http); +use Image::Magick; +use Apache::lonplot; +use LONCAPA; + + +my %args; +my $cgi_id; +my $scale_factor; # image scale factor. +my $label_xscale; # Label scale factor (needed for gnuplot). +my $label_yscale; +my $dirty_width_adjust = 5; # Width adjustment for e.g. gnuplot images. BEGIN { - &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label')); + &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label','bgimg')); } + + +sub check_int { + # utility function to do error checking on a integer. + my ($num,$default) = @_; + $default = 100 if (! defined($default)); + $num =~ s/\s+//g; # We dont need no stinkin white space! + # If it is a real, just grab the integer part. + ($num,undef) = split (/\./,$num) if ($num =~ /\./); + # set to default if what we have left doesn't match anything... + $num = $default unless ($num =~/^\d+$/); + return $num; +} + +# Get width/height from an image tag... +# +# Parameters: +# tag - tag potentially containing height/width attributes. +# def_width - Default width. +# def_height - Default height. +# Returns: +# list containing width/height. +# +sub extract_tag_sizes { + my ($tag, $dw, $dh) = @_; + $tag =~ s/\s+/ /g; # Collapse whitespace. + $tag =~ s/\s*=\s*/=/g; # kill space around ='s. + $tag =~ s/[<>\"]//g; # Get rid of the <">'s too. + + &Apache::lonxml::debug("Compressed tag: $tag"); + my @taglist = split(/ /,$tag); + foreach my $attribute (@taglist) { + if ($attribute =~ /^width/i) { + my ($e, $s)= split(/=/,$attribute); + $dw = $s; + } + if ($attribute =~ /^height/i) { + my ($e, $s) = split(/=/,$attribute); + $dh = $s; + } + } + return($dw, $dh); + +} + +my ($height_param,$width_param); sub start_randomlabel { - my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; - my $result=''; - $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]= - '/res/adm/includes/GLabel.class'; - - my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval); - - if ( $bgimg !~ /^http:/ ) { - $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=$bgimg; - $bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg); - if ($bgimg =~ /$Apache::lonnet::perlvar{'lonDocRoot'}/) { - $bgimg=~s/$Apache::lonnet::perlvar{'lonDocRoot'}//; - } elsif ($bgimg =~ m:^/home/.*/public_html:) { - $bgimg =~ s:^/home/(.*)/public_html:/~$1:; - } - $bgimg="http://".$ENV{'SERVER_NAME'}.$bgimg; - } - my $code = &Apache::lonxml::get_param('code',$parstack,$safeeval); - my $codebase = &Apache::lonxml::get_param('codebase',$parstack,$safeeval); - my $w= &Apache::lonxml::get_param('width',$parstack,$safeeval); - my $h= &Apache::lonxml::get_param('height',$parstack,$safeeval); - my $texwidth= &Apache::lonxml::get_param('texwidth',$parstack,$safeeval); - if (!$code) { $code='GLabel.class'; } - if (!$codebase) { $codebase='/res/adm/includes/'; } - $Apache::randomlabel::tlabel_cnt=0; - $Apache::randomlabel::ilabel_cnt=0; - if ($target eq 'web') { - $result.=""; - $result.=""; - } elsif ($target eq 'tex') { - $bgimg=~s/(.gif|.jpg)$/.eps/; - $bgimg=~s/http:\/\/[^\/]*/\/home\/httpd\/html/; - $result.='\vspace*{2mm} \noindent \epsfxsize='.$texwidth.' mm \epsffile{'. - $bgimg.'}\setlength{\unitlength}{1mm} \begin{picture}('.$texwidth.','.$texwidth*$h/$w.')' - } elsif ($target eq 'edit') { - $result.=&Apache::edit::tag_start($target,$token); - $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).' '; - $result.=&Apache::edit::browse('bgimg').' '; - $result.=&Apache::edit::search('bgimg').'
'. - &Apache::edit::text_arg('Width(pixel):' ,'width' ,$token,6). - &Apache::edit::text_arg('Height(pixel):','height' ,$token,6). - &Apache::edit::text_arg('TeXWidth(mm):' ,'texwidth',$token,6). - &Apache::edit::end_row().&Apache::edit::start_spanning_row(); - } elsif ($target eq 'modified') { - my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval, - 'bgimg','width','height', - 'texwidth'); - if ($constructtag) { - $result = &Apache::edit::rebuild_tag($token); - $result.=&Apache::edit::handle_insert(); + + my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; + my $result=''; + push (@Apache::lonxml::namespace,'randomlabel'); + ($height_param,$width_param)=(0,0); + $label_xscale = 1.0; # Assume image size not overridden. + $label_yscale = 1.0; + my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval); + if ( defined($bgimg) && $bgimg !~ /^https?\:/ ) { + $bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg); + if (&Apache::lonnet::repcopy($bgimg) ne 'ok') { + $bgimg='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif'; + } } - } - return $result; + $Apache::randomlabel::obj_cnt=0; + if ($target eq 'web') { + $cgi_id=&Apache::loncommon::get_cgi_id(); + %args=(); + $args{"cgi.$cgi_id.BGIMG"}=&escape($bgimg); + $height_param = &Apache::lonxml::get_param('height',$parstack, $safeeval); + $width_param = &Apache::lonxml::get_param('width', $parstack, $safeeval); + } elsif ($target eq 'tex' && defined($bgimg)) { + $result.=&make_eps_image($bgimg,$parstack,$safeeval); + } elsif ($target eq 'edit') { + my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures')); + $result.=&Apache::edit::tag_start($target,$token); + $Apache::edit::bgimgsrc= + &Apache::lonxml::get_param('bgimg',$parstack,$safeeval); + $Apache::edit::bgimgsrccurdepth=$Apache::lonxml::curdepth; + $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).' '; + $result.=&Apache::edit::browse('bgimg',undef,undef,$only).' '; + $result.=&Apache::edit::search('bgimg').'
'. + &Apache::edit::text_arg('Width(pixel):' ,'width' ,$token,6). + &Apache::edit::text_arg('Height(pixel):','height' ,$token,6). + &Apache::edit::text_arg('TeXWidth(mm):' ,'texwidth',$token,6). + &Apache::edit::end_row().&Apache::edit::start_spanning_row(); + } elsif ($target eq 'modified') { + my $constructtag=&Apache::edit::get_new_args($token,$parstack, + $safeeval,'bgimg','width', + 'height','texwidth'); + if ($constructtag) { + $result = &Apache::edit::rebuild_tag($token); + } + } + return $result; } sub end_randomlabel { - my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; - my $result=''; - my $count; - - - if ($target eq 'web') { - $count = $Apache::randomlabel::tlabel_cnt; - if( $count != 0) { $result.= ""; } - $count = $Apache::randomlabel::ilabel_cnt; - if( $count != 0) { $result.= ""; } - $result .= "
"; - } elsif ($target eq 'tex') { - $result='\end{picture}'; - } elsif ($target eq 'edit') { - $result.=&Apache::edit::end_table; - } - return $result; + my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; + my $result=''; + my $count; + pop @Apache::lonxml::namespace; + if ($target eq 'web') { + $count = $Apache::randomlabel::obj_cnt; + if( $count != 0) { $args{"cgi.$cgi_id.OBJCOUNT"}=$count; } + $result.='
'."\n"; + &Apache::lonnet::appenv(\%args); + } elsif ($target eq 'tex') { + $result='\end{picture}\\\\'; + $result.= ' \vskip -'.$height_param.' mm } \\\\ '; + } elsif ($target eq 'edit') { + $result.=&Apache::edit::end_table; + } + return $result; +} + + +sub start_bgimg { + my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; + my $result=''; + if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { + &Apache::lonxml::startredirection(); + } + return $result; +} + +sub end_bgimg { + my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; + my $result=''; + if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { + my $bgimg=&Apache::lonxml::endredirection(); + if ($target eq 'web') { + + # If the tag produced has sizes, they override ours. + # (for now anyway). + # + &Apache::lonxml::debug("Base sizes: $width_param x $height_param"); + + my ($plot_x, $plot_y) = &extract_tag_sizes($bgimg, + $width_param, + $height_param); + &Apache::lonxml::debug("Extracted sizes: $plot_x x $plot_y"); + if ($width_param) { + $label_xscale = $plot_x / $width_param; + } + if ($height_param) { + $label_yscale = $plot_y / $height_param; + } + &Apache::lonxml::debug("Scale factors: $label_xscale $label_yscale"); + + &Apache::lonxml::debug("Image: $bgimg"); + $bgimg=&Apache::imageresponse::clean_up_image($bgimg); + &Apache::lonxml::debug("Cleaned image: $bgimg"); + $args{"cgi.$cgi_id.BGIMG"}=&escape($bgimg); + } elsif ($target eq 'tex') { + # Some bg images can create latex for us... e.g. gnuplot. + # If it looks like we have some latex use that, + # otherwise, assume this is a resource name that must + # be converted into the latex to create an eps insertion. + # + my $src = $bgimg; + $src =~ s/\s+$//s; + $src =~ s/^\s+//s; + + #If this is a dynamically generated image, it will + #be in latex already, with a comment header that + #describes the dimensions: + + if($src =~ /^%DYNAMICIMAGE:/) { + $Apache::lonxml::debug = 0; + &Apache::lonxml::debug("Dynamic image"); + my ($commentline, $junk) = split(/\n/, $src); + &Apache::lonxml::debug("Comment line was: $commentline"); + my $trash; + my $initial_width; + ($trash, $initial_width, $height_param, $width_param) = + split(/:/,$commentline); + &Apache::lonxml::debug("internal web Width/height: $initial_width $height_param"); + &Apache::lonxml::debug("Texwitdh: $width_param"); + if($initial_width == 0) { + $initial_width = $width_param; + } + # strip off the comments since output does not always + # preserve \n's: + # + $src =~ s/$commentline//; + $scale_factor = $width_param / $initial_width; + $height_param = $height_param*$scale_factor; + + $label_xscale = 1.0; # $scale_factor; + $label_yscale = 1.0; # $scale_factor; + + &Apache::lonxml::debug("height $height_param"); + &Apache::lonxml::debug("Width $width_param"); + &Apache::lonxml::debug("Scale factors: $label_xscale $label_yscale"); + my $dirty_width = $width_param + $dirty_width_adjust; + my $x_offset = -$dirty_width_adjust/2.0; + # + # Somewhere here it looks like height_param and + # width_param got backwards... + # + $result .= '\parbox{'.$dirty_width.'mm}{'; + $result .= " $src \n"; + $result .= '\setlength{\unitlength}{1mm}'."\n"; + $result .= '\begin{picture}('."$width_param,$height_param)"; + $result .= "($x_offset,-$height_param)"; + $result .= "\n"; + $Apache::lonxml::debug = 0; + + } else { + $result.=&make_eps_image($bgimg,$parstack,$safeeval,-2); + } + } + } + return $result; +} +sub make_eps_image { + my ($bgimg,$parstack,$safeeval,$depth)=@_; + &Apache::lonxml::debug("image prior to get_eps_image: $bgimg"); + my ($path,$file) = &Apache::londefdef::get_eps_image($bgimg); + &Apache::lonxml::debug("image after: $bgimg"); + ($height_param,$width_param)= + &Apache::londefdef::image_size($bgimg,0.3,$parstack,$safeeval, + $depth,1); + + &Apache::lonxml::debug("Image size: $height_param x $width_param"); + + my $dirtywidth=$width_param+5; + + my $result ="\n".'\vspace*{2mm}\noindent'."\n". + '\parbox{'.$dirtywidth. + ' mm}{ \noindent \epsfxsize='.$width_param. + ' mm \epsffile{'.$path.$file. + '}\setlength{\unitlength}{1mm}'."\n".' \begin{picture}('. + $width_param.','.$height_param.')(0,-'.$height_param.')'."\n"; + my $magick = Image::Magick->new; + $magick->Read($bgimg); + my $initial_width = $magick->Get('width'); + &Apache::lonxml::debug("ImageMagick thinks width is; $initial_width"); + $scale_factor = $width_param / $initial_width; + return $result; } sub start_labelgroup { - my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; - my $result=''; - my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval); - my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval); - $type =~tr/A-Z/a-z/; - if ($target eq 'web' || $target eq 'tex' || - $target eq 'grade' || $target eq 'answer') { - $Apache::randomlabel::groupname=$name; - $Apache::randomlabel::type=$type; - @Apache::randomlabel::xcoord = (); - @Apache::randomlabel::ycoord = (); - @Apache::randomlabel::value = (); - @Apache::randomlabel::label_arr = (); - } elsif ($target eq 'edit') { - $result.=&Apache::edit::tag_start($target,$token); - $result.=&Apache::edit::text_arg('Name:','name',$token). - &Apache::edit::select_arg('Type:','type',['text','image'],$token). - &Apache::edit::end_row().&Apache::edit::start_spanning_row(); - } elsif ($target eq 'modified') { - my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval, - 'name','type'); - if ($constructtag) { - $result = &Apache::edit::rebuild_tag($token); - $result.=&Apache::edit::handle_insert(); + my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; + my $result=''; + my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval); + my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval); + $type =~tr/A-Z/a-z/; + if ($target ne 'modified' && ($name =~ /\W/ || $name =~ /^[0-9]/)) { + &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.
"); } - } - return $result; + if ($target eq 'web' || $target eq 'tex' || + $target eq 'grade' || $target eq 'answer' || $target eq 'analyze') { + $Apache::randomlabel::groupname=$name; + $Apache::randomlabel::type=$type; + @Apache::randomlabel::xcoord = (); + @Apache::randomlabel::ycoord = (); + @Apache::randomlabel::value = (); + @Apache::randomlabel::label_arr = (); + @Apache::randomlabel::description = (); + } elsif ($target eq 'edit') { + $result.=&Apache::edit::tag_start($target,$token); + $result.=&Apache::edit::text_arg('Name:','name',$token). + &Apache::edit::select_arg('Type:','type',['text','image'],$token); + if (!defined($token->[2]{'TeXsize'})) { + $token->[2]{'TeXsize'}='\normalsize'; + } + $result.=&Apache::edit::select_arg('TeX font size:','TeXsize', + ['\tiny','\scriptsize', + '\footnotesize','\small', + '\normalsize','\large','\Large', + '\LARGE','\huge','\Huge'], + $token); + $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row(); + } elsif ($target eq 'modified') { + my $constructtag=&Apache::edit::get_new_args($token,$parstack, + $safeeval,'name','type', + 'TeXsize'); + if ($constructtag) { + $result = &Apache::edit::rebuild_tag($token); + } + } + return $result; +} + +# +# Utility sub to compute the width of a label. +# +sub get_label_width { + my $label = shift; + &Apache::lonxml::debug("image label = $label"); + if (-e $label) { + &Apache::lonxml::debug("$label exists"); + } else { + &Apache::lonxml::debug("$label does not exist"); + } + my $magick = Image::Magick->new; + $magick->Read($label); + my $pixel_width = $magick->Get('width'); + return $pixel_width * $scale_factor; + + +} + +sub get_label_height { + my $label = shift; + &Apache::lonxml::debug("image label = $label"); + if (-e $label) { + &Apache::lonxml::debug("$label exists"); + } else { + &Apache::lonxml::debug("$label does not exist"); + } + my $magick = Image::Magick->new; + $magick->Read($label); + my $pixel_height = $magick->Get('height'); + return $pixel_height * $scale_factor; } sub add_vars { - my ($name,$order,$label,$labelorder,$value,$safeeval) = @_; - my $code = '${'.$name."}{'".($order+1)."'}='".$label."';"; - my $out=Apache::run::run($code,$safeeval); - if ($value) { - $code = '${'.$name."}{'value_".($order+1)."'}='".$value."';"; - $out=Apache::run::run($code,$safeeval); - $code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';"; + my ($name,$order,$label,$labelorder,$value,$image,$safeeval) = @_; + if (!defined($name) || $name eq '') { return; } + my $code = '${'.$name."}{'".($order+1)."'}='".$label."';"; + my $out=Apache::run::run($code,$safeeval); + if ($value) { + $code = '${'.$name."}{'value_".($order+1)."'}='".$value."';"; + $out=Apache::run::run($code,$safeeval); + $code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';"; + $out=Apache::run::run($code,$safeeval); + } + if ($image) { + my $code = '${'.$name."}{'image_".($order+1)."'}='".$image."';"; + my $out=Apache::run::run($code,$safeeval); + } + $code = '${'.$name."}{'numlocations'}='".($order+1)."';"; $out=Apache::run::run($code,$safeeval); - } - $code = '${'.$name."}{'numlocations'}='".($order+1)."';"; - $out=Apache::run::run($code,$safeeval); } # begin to assign labels to locations sub end_labelgroup { - my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; - my $gname = $Apache::randomlabel::groupname; - my $type = $Apache::randomlabel::type; - my $result=''; - if ($target eq 'web' || $target eq 'answer' || $target eq 'grade') { - my @idx_arr = (0 .. $#Apache::randomlabel::label_arr); - &Apache::structuretags::shuffle(\@idx_arr); - for(0 .. $#Apache::randomlabel::label_arr) { - my $str; - my $xstr; - my $ystr; - my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]"; - my $x = $Apache::randomlabel::xcoord[$_]; - my $y = $Apache::randomlabel::ycoord[$_]; - my $value = $Apache::randomlabel::value[$_]; - if( $type eq 'text') { - &add_vars($gname,$_,$label,$idx_arr[$_],$value,$safeeval); - $str = 'LB'.$Apache::randomlabel::tlabel_cnt; - $xstr = 'X'.$Apache::randomlabel::tlabel_cnt; - $ystr = 'Y'.$Apache::randomlabel::tlabel_cnt; - $Apache::randomlabel::tlabel_cnt += 1; - } elsif ( $type eq 'image') { - &add_vars($gname,$_,$idx_arr[$_],$idx_arr[$_],$value,$safeeval); - $str = 'LB'.$Apache::randomlabel::ilabel_cnt; - $xstr = 'X'.$Apache::randomlabel::ilabel_cnt; - $ystr = 'Y'.$Apache::randomlabel::ilabel_cnt; - $Apache::randomlabel::ilabel_cnt += 1; - } else { - &Apache::lonxml::error('Unknown type of label :'.$type.':'); - } - if ($target eq 'web') { - $result .= ''; - $result .= ''; - $result .= ''; - } - } - } elsif ($target eq 'tex') { - my $WX1=0; # Web x-coord. of upper left corner (ULC) - my $WY1=0; # Web y-coord. of (ULC) - my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2); - my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2); - my $texwidth=&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,-2); - my $TX1=0; - my $TY1=$texwidth*($wheight/$wwidth); - my $TX2=$texwidth; - my $TY2=0; - - - my $slopex=($wwidth-$WX1)/($TX2-$TX1); - my $slopey=($wheight-$WY1)/($TY2-($TY1-1.0)); - my $cstx=$wwidth-$slopex*($TX2); - my $csty=$wheight-$slopey*($TY2); - - my @idx_arr = (0 .. $#Apache::randomlabel::label_arr); - &Apache::structuretags::shuffle(\@idx_arr); - - &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":"); - for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) { - my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]"; - my $x = $Apache::randomlabel::xcoord[$i]; - my $y = $Apache::randomlabel::ycoord[$i]; - my $value = $Apache::randomlabel::value[$i]; -# my $tcX=$x*($texwidth/$wwidth) - $texwidth; - my $tcX=$x*($texwidth/$wwidth); -# my $tcY=$TY1-$y*($TY1/$wheight)-2; - my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 ); - my $tcY=$TY1-$y*($TY1/$wheight)+$texwidth*$ratio; - $tcX=sprintf('%.2f',$tcX); - $tcY=sprintf('%.2f',$tcY); - $result.='\put('.$tcX.','.$tcY.'){\normalsize \bf '.$label.'}'."\n"; - if( $type eq 'text') { - &add_vars($gname,$i,$label,$idx_arr[$i],$value,$safeeval); - } elsif ( $type eq 'image') { - &add_vars($gname,$i,$idx_arr[$i],$idx_arr[$i],$value,$safeeval); - } else { - &Apache::lonxml::error('Unknown type of label :'.$type.':'); - } - } - } elsif ($target eq 'edit') { - $result.=&Apache::edit::end_table; - } - return $result; + my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; + my $gname = $Apache::randomlabel::groupname; + my $type = $Apache::randomlabel::type; + my $result=''; + if ($target eq 'web' || $target eq 'answer' || $target eq 'grade' || + $target eq 'analyze') { + my @idx_arr = (0 .. $#Apache::randomlabel::label_arr); + &Apache::structuretags::shuffle(\@idx_arr); + for(0 .. $#Apache::randomlabel::label_arr) { + my $str; + my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]"; + my $x = $Apache::randomlabel::xcoord[$_]; + my $y = $Apache::randomlabel::ycoord[$_]; + my $value = $Apache::randomlabel::value[$_]; + my $i=$Apache::randomlabel::obj_cnt++; + if( $type eq 'text') { + &add_vars($gname,$_,$label,$idx_arr[$_],$value,'',$safeeval); + $str = join(':',$x,$y,&escape($label)); + $args{"cgi.$cgi_id.OBJTYPE"}.='LABEL:'; + } elsif ( $type eq 'image') { + &add_vars($gname,$_, + $Apache::randomlabel::description[$idx_arr[$_]], + $idx_arr[$_],$value,$label,$safeeval); + $str = join(':',$x,$y,&escape($label)); + $args{"cgi.$cgi_id.OBJTYPE"}.='IMAGE:'; + } else { + &Apache::lonxml::error('Unknown type of label :'.$type.':'); + } + if ($target eq 'web') { $args{"cgi.$cgi_id.OBJ$i"} =$str; } + } + } elsif ($target eq 'tex') { + my $WX1=0; # Web x-coord. of upper left corner (ULC) + my $WY1=0; # Web y-coord. of (ULC) + my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2); + my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2); + my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval); + if (!defined($TeXsize)) { $TeXsize='\\normalsize'; } + + my @idx_arr = (0 .. $#Apache::randomlabel::label_arr); + &Apache::structuretags::shuffle(\@idx_arr); + + &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":"); + $Apache::lonxml::debug = 0; + for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) { + my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]"; + my $x = $Apache::randomlabel::xcoord[$i]; + my $y = $Apache::randomlabel::ycoord[$i]; + if ( $type eq 'text' ) { + # FIXME the 3.5 here is the 'height' of the letter in TeX + $y=$y-3.5; + } + &Apache::lonxml::debug("initially: x= $x y= $y"); + my $value = $Apache::randomlabel::value[$i]; + #x latex coordinate + my $tcX=($x)*($width_param/$wwidth); + &Apache::lonxml::debug("wparam = $width_param wwidth = $wwidth, texx = $tcX"); + #y latex coordinate + # my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 ); + my $tcY=$height_param-$y*($height_param/$wheight); + if ( $type eq 'image') { + my $label_height = &get_label_height($label); + $tcY=$tcY-$label_height; + } + + &Apache::lonxml::debug("hparam = $height_param wheight = $wheight texy = $tcY"); + $tcX=sprintf('%.2f',$tcX); + $tcY=sprintf('%.2f',$tcY); + $result .= '\put('.$tcX.','.$tcY.'){'; + if( $type eq 'text') { + $result.= $TeXsize.' \bf '.$label."}\n"; + &add_vars($gname,$i,$label,$idx_arr[$i],$value,'',$safeeval); + } elsif ( $type eq 'image') { + my ($path,$file) = &Apache::londefdef::get_eps_image($label); + my $image_name = $path.$file; + # + # Note that spaces in e.. \includegraphics cause problems for Latex + # so they get replaced by _'s by lonprintout/printout and us: + # + my $label_width = &get_label_width($label); + + $result .= '\includegraphics[width='.$label_width.'mm]{' + .$image_name."}}\n"; + &add_vars($gname,$i, + $Apache::randomlabel::description[$idx_arr[$i]], + $idx_arr[$i],$value,$label,$safeeval); + } else { + &Apache::lonxml::error('Unknown type of label :'.$type.':'); + } + } + $Apache::lonxml::debug =0; + } elsif ($target eq 'edit') { + $result.=&Apache::edit::end_table; + } + return $result; } # sub start_location { - my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; - my $x= &Apache::lonxml::get_param('x',$parstack,$safeeval); - my $y= &Apache::lonxml::get_param('y',$parstack,$safeeval); - my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval); - my $result=''; - push(@Apache::randomlabel::xcoord,$x); - push(@Apache::randomlabel::ycoord,$y); - push(@Apache::randomlabel::value,$value); - if ($target eq 'edit') { - $result.=&Apache::edit::tag_start($target,$token); - $result.=&Apache::edit::text_arg('X:','x',$token,4). - &Apache::edit::text_arg('Y:','y',$token,4). - &Apache::edit::text_arg('Value:','value',$token). - &Apache::edit::end_row(); - $result.=&Apache::edit::end_table; - } elsif ($target eq 'modified') { - my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval, - 'x','y','value'); - if ($constructtag) { - $result = &Apache::edit::rebuild_tag($token); - $result.=&Apache::edit::handle_insert(); + $Apache::lonxml::debug = 0; + my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; + my $x= &check_int(&Apache::lonxml::get_param('x',$parstack,$safeeval),50); + my $y= &check_int(&Apache::lonxml::get_param('y',$parstack,$safeeval),50); + &Apache::lonxml::debug("x = $x y = $y"); + $x = $x*$label_xscale; + $y = $y*$label_yscale; + &Apache::lonxml::debug(" H = $height_param W = $width_param"); + &Apache::lonxml::debug(" XS = $label_xscale YS = $label_yscale"); + &Apache::lonxml::debug(" X = $x Y = $y"); + my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval); + my $result=''; + push(@Apache::randomlabel::xcoord,$x); + push(@Apache::randomlabel::ycoord,$y); + push(@Apache::randomlabel::value,$value); + if ($target eq 'edit') { + $result.=&Apache::edit::tag_start($target,$token); + $result.=&Apache::edit::text_arg('X:','x',$token,4). + &Apache::edit::text_arg('Y:','y',$token,4). + &Apache::edit::entercoords('x','y','attribute','width','height').'   '. + &Apache::edit::text_arg('Value:','value',$token). + &Apache::edit::end_row(); + $result.=&Apache::edit::end_table; + } elsif ($target eq 'modified') { + my $constructtag=&Apache::edit::get_new_args($token,$parstack, + $safeeval,'x','y','value'); + if ($constructtag) { + $result = &Apache::edit::rebuild_tag($token); + } } - } - return $result; + $Apache::lonxml::debug = 0; + return $result; } sub end_location { - my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; - my @result; - if ($target eq 'edit') { @result=('','no') } - return @result; + my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; + my @result; + if ($target eq 'edit') { @result=('','no') } + return @result; } # +sub insert_label { + my ($after) = @_; + my $depth = scalar(@Apache::lonxml::depthcounter); + $depth-- if ($after); + my $inset = "\t"x$depth; + return "\n$inset"; +} + sub start_label { - my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; - my $result=''; - if ($target eq 'web' || $target eq 'tex' || - $target eq 'grade' || $target eq 'answer') { - my $ltext=&Apache::lonxml::get_all_text("/label",$$parser[-1]); - $ltext=&Apache::run::evaluate($ltext,$safeeval,$$parstack[-1]); - push(@Apache::randomlabel::label_arr,$ltext); - } elsif ($target eq 'edit') { - $result.=&Apache::edit::tag_start($target,$token); - my $text=&Apache::lonxml::get_all_text("/label",$$parser[-1]); - $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row(). - &Apache::edit::editfield('',$text,'',20,1). - &Apache::edit::end_table(); - } elsif ($target eq 'modified') { - my $text=$$parser[-1]->get_text("/label"); - $result.='