Annotation of loncom/homework/randomlabel.pm, revision 1.52

1.1       tsai        1: # The LearningOnline Network with CAPA
                      2: # random labelling tool
1.8       albertel    3: #
1.52    ! albertel    4: # $Id: randomlabel.pm,v 1.51 2003/10/16 19:23:58 sakharuk 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: #
1.3       tsai       28: # 7/20/2001 Isaac Tsai, initial syntax
                     29: # 8/10/2001 Isaac Tsai, 
                     30: # 8/30/2001 Isaac Tsai, 
1.1       tsai       31: # SYNTAX:
1.4       albertel   32: # <randomlabel bgimg="URL" width="12" height="45" texwidth="50">
                     33: #    <labelgroup name="GroupOne" type="image">
                     34: #      <location x="123" y="456" />
                     35: #      <location x="321" y="654" />
                     36: #      <location x="213" y="546" />
                     37: #      <label description="TEXT-1">IMG-URL</label>
                     38: #      <label description="TEXT-2">IMG-URL</label>
                     39: #      <label description="TEXT-3">IMG-URL</label>
1.1       tsai       40: #    </labelgroup>
1.4       albertel   41: #    <labelgroup name="GroupTwo" type="text">
                     42: #      <location x="12" y="45" />
                     43: #      <location x="32" y="65" />
                     44: #      <location x="21" y="54" />
1.3       tsai       45: #      <label>TEXT-1</label>
                     46: #      <label>TEXT-2</label>
                     47: #      <label>TEXT-3</label>
1.1       tsai       48: #    </labelgroup>
                     49: #   </randomlabel>
                     50: #  ===========================================
1.3       tsai       51: #  side effect:
                     52: #    location (123,456): $GroupOne[0] = 2  # images give out indexes
                     53: #             (321,654): $GroupOne[1] = 1
                     54: #             (213,546): $GroupOne[2] = 0
                     55: #    location (12,45)  : $GroupTwo[0] = "TEXT-3"
                     56: #             (32,65)  : $GroupTwo[1] = "TEXT-1"
                     57: #             (21,54)  : $GroupTwo[2] = "TEXT-2"
1.1       tsai       58: #  ===========================================
                     59: package Apache::randomlabel;
1.24      sakharuk   60: use Apache::lonnet;
1.1       tsai       61: use strict;
1.13      sakharuk   62: use Apache::edit;
1.36      sakharuk   63: use Apache::File();
1.38      sakharuk   64: use Apache::Constants qw(:common :http);
1.1       tsai       65: 
1.13      sakharuk   66: BEGIN {
1.47      albertel   67:     &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label'));
1.1       tsai       68: }
                     69: 
1.23      matthew    70: sub check_int {
                     71:     # utility function to do error checking on a integer.
                     72:     my ($num,$default) = @_;
                     73:     $default = 100 if (! defined($default));
                     74:     $num =~ s/\s+//g;  # We dont need no stinkin white space!
                     75:     # If it is a real, just grab the integer part.
                     76:     ($num,undef) = split (/\./,$num) if ($num =~ /\./); 
                     77:     # set to default if what we have left doesn't match anything...
                     78:     $num = $default unless ($num =~/^\d+$/);
                     79:     return $num;
                     80: }
                     81: 
1.1       tsai       82: sub start_randomlabel {
1.47      albertel   83:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                     84:     my $result='';
                     85:     push (@Apache::lonxml::namespace,'randomlabel');
                     86:     my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
                     87:     if ( $bgimg !~ /^http:/ ) {
                     88: 	$bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);
                     89: 	if (&Apache::lonnet::repcopy($bgimg) ne OK) {
                     90: 	    $bgimg='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
                     91: 	}
1.42      www        92:     }
1.47      albertel   93:     my $w= &check_int(&Apache::lonxml::get_param('width',$parstack,$safeeval));
                     94:     my $h= &check_int(&Apache::lonxml::get_param('height',$parstack,$safeeval));
1.50      sakharuk   95:     my $texwidth=&adjust_textwidth(&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,undef,1));
1.49      albertel   96:     if (!$texwidth) { $texwidth=90; }
1.47      albertel   97:     $Apache::randomlabel::tlabel_cnt=0;
                     98:     $Apache::randomlabel::ilabel_cnt=0;
                     99:     if ($target eq 'web') {
                    100: 	&Apache::lonxml::startredirection();
                    101: 	$result.="BGIMG=".&Apache::lonnet::escape($bgimg);
                    102:     } elsif ($target eq 'tex') {
                    103: 	my $newbgimg = $bgimg;
                    104: 	$bgimg=~s/\.(gif|jpg|png|jpeg)$/\.eps/i;
                    105: 	$bgimg= &Apache::lonnet::filelocation($bgimg);
                    106: 	$bgimg=~s/http:\/[^\/]*/\/home\/httpd\/html/;
                    107: 	$bgimg=~s/\/$//;
                    108: 	#if no eps file try to replicate it
                    109: 	if (not-e $bgimg) {
                    110: 	    if (&Apache::lonnet::repcopy($bgimg) ne OK ) {
                    111: 		#if replication failed try to find ps file
                    112: 		$bgimg=~s/\.eps$/\.ps/;
                    113: 		#if no ps file try to replicate it
1.45      sakharuk  114: 		if (not -e $bgimg &&
1.38      sakharuk  115: 		    &Apache::lonnet::repcopy($bgimg) ne OK) {
                    116:                     #if replication failed try to produce eps file dynamically
1.36      sakharuk  117: 		    $bgimg=~s/\.ps$/\.eps/;
                    118: 		    my $temp_file;
                    119: 		    my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.dat";
                    120: 		    $temp_file = Apache::File->new('>>'.$filename);
                    121: 		    $newbgimg =~ s/(.*)\/res\//\/home\/httpd\/html\/res\//;
                    122: 		    print $temp_file "$newbgimg\n";
1.51      sakharuk  123: 		    $bgimg=~s/\/home\/httpd\/html\/res/\/home\/httpd\/prtspool/;		}
1.47      albertel  124: 	    }
                    125: 	}
                    126: 	$bgimg=~s/\/$//;
                    127: 	my $dirtywidth=$texwidth+5;
1.50      sakharuk  128: 	$result.='\vspace*{2mm}\noindent \parbox{'.$dirtywidth.' mm}{  \noindent \epsfxsize='.
                    129: 	    $texwidth.' mm \epsffile{'.$bgimg.'}\setlength{\unitlength}{1mm}  \begin{picture}('.
                    130: 	    $texwidth.','.$texwidth*$h/$w.')(0,-'.$texwidth*$h/$w.')';
1.47      albertel  131:     } elsif ($target eq 'edit') {
                    132: 	$result.=&Apache::edit::tag_start($target,$token);
                    133: 	$Apache::edit::bgimgsrc=
                    134: 	    &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
                    135: 	$Apache::edit::bgimgsrccurdepth=$Apache::lonxml::curdepth;
                    136: 	$result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).' ';
                    137: 	$result.=&Apache::edit::browse('bgimg').' ';
                    138: 	$result.=&Apache::edit::search('bgimg').'<br />'.
                    139: 	    &Apache::edit::text_arg('Width(pixel):' ,'width'   ,$token,6).
                    140: 	    &Apache::edit::text_arg('Height(pixel):','height'  ,$token,6).
                    141: 	    &Apache::edit::text_arg('TeXWidth(mm):' ,'texwidth',$token,6).
                    142: 	    &Apache::edit::end_row().&Apache::edit::start_spanning_row();     
                    143:     } elsif ($target eq 'modified') {
                    144: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    145: 						     $safeeval,'bgimg','width',
                    146: 						     'height','texwidth');
                    147: 	if ($constructtag) {
                    148: 	    $result = &Apache::edit::rebuild_tag($token);
                    149: 	    $result.=&Apache::edit::handle_insert();
                    150: 	}
1.31      sakharuk  151:     }
1.47      albertel  152:     return $result;
1.1       tsai      153: }
                    154: 
                    155: sub end_randomlabel {
1.47      albertel  156:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    157:     my $result='';
                    158:     my $count;
                    159:     pop @Apache::lonxml::namespace;
                    160:     if ($target eq 'web') {
                    161: 	my $args=&Apache::lonxml::endredirection();
                    162: 	$args=~s/\s*&/&/g;
                    163: 	$args=~s/\s*$//;
                    164: 	$count = $Apache::randomlabel::tlabel_cnt;
                    165: 	if( $count != 0) { $args.= "&COUNT=$count"; }
                    166: 	$count = $Apache::randomlabel::ilabel_cnt;
                    167: 	if( $count != 0) { $args.= "&ICOUNT=$count"; }
                    168: 	my $token=$Apache::lonxml::curdepth.'_'.$$;
                    169: 	$result.='<img src="/adm/randomlabel.png?token='.$token;
                    170: 	$result.='" /><br />'."\n";
                    171: 	&Apache::lonnet::appenv(("imagerequest.$token"=>&Apache::lonnet::escape($args)));
                    172:     } elsif ($target eq 'tex') {
                    173: 	$result='\end{picture}\\\\';
                    174: 	my $height=&Apache::lonxml::get_param('height',$parstack,$safeeval);
                    175: 	my $width=&Apache::lonxml::get_param('width',$parstack,$safeeval);
1.50      sakharuk  176: 	my $texwidth=&adjust_textwidth(&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,undef,1));
1.49      albertel  177:         if (!$texwidth) { $texwidth=90; }
1.47      albertel  178: 	my $howtoskipback = $texwidth*$height/$width;
                    179: 	$result.= ' \vskip -'.$howtoskipback.' mm }  \\\\ ';
                    180:     } elsif ($target eq 'edit') {
                    181: 	$result.=&Apache::edit::end_table;
                    182:     }
                    183:     return $result;
1.1       tsai      184: }
                    185: 
1.50      sakharuk  186: sub adjust_textwidth {
                    187:     my $texwidth=shift; 
                    188:     my $pagewidth=$ENV{'form.textwidth'};
                    189:     $pagewidth=~s/\s*mm\s*$//;
                    190:     if ($texwidth>$pagewidth) {$texwidth=$pagewidth;}
                    191:     return $texwidth;
                    192: }
                    193: 
1.1       tsai      194: sub start_labelgroup {
1.47      albertel  195:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    196:     my $result='';
                    197:     my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
                    198:     my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
                    199:     $type =~tr/A-Z/a-z/;
1.48      albertel  200:     if ($target ne 'modified' && ($name =~ /\W/ || $name =~ /^[0-9]/)) {
                    201: 	&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 />");
                    202:     }
1.47      albertel  203:     if ($target eq 'web' || $target eq 'tex' ||
                    204: 	$target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
                    205: 	$Apache::randomlabel::groupname=$name;
                    206: 	$Apache::randomlabel::type=$type;
                    207: 	@Apache::randomlabel::xcoord = ();
                    208: 	@Apache::randomlabel::ycoord = ();
                    209: 	@Apache::randomlabel::value = ();
                    210: 	@Apache::randomlabel::label_arr  = ();
                    211: 	@Apache::randomlabel::decription  = ();
                    212:     } elsif ($target eq 'edit') {
                    213: 	$result.=&Apache::edit::tag_start($target,$token);
                    214: 	$result.=&Apache::edit::text_arg('Name:','name',$token).
                    215: 	    &Apache::edit::select_arg('Type:','type',['text','image'],$token).
                    216: 	    &Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    217:     } elsif ($target eq 'modified') {
                    218: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    219: 						     $safeeval,'name','type');
                    220: 	if ($constructtag) {
                    221: 	    $result = &Apache::edit::rebuild_tag($token);
                    222: 	    $result.=&Apache::edit::handle_insert();
                    223: 	}
1.4       albertel  224:     }
1.47      albertel  225:     return $result;
1.1       tsai      226: }
                    227: 
1.5       albertel  228: sub add_vars {
1.47      albertel  229:     my ($name,$order,$label,$labelorder,$value,$image,$safeeval) = @_;
                    230:     my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
                    231:     my $out=Apache::run::run($code,$safeeval);
                    232:     if ($value) {
                    233: 	$code = '${'.$name."}{'value_".($order+1)."'}='".$value."';";
                    234: 	$out=Apache::run::run($code,$safeeval);
                    235: 	$code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';";
                    236: 	$out=Apache::run::run($code,$safeeval);
                    237:     }
                    238:     if ($image) {
                    239: 	my $code = '${'.$name."}{'image_".($order+1)."'}='".$image."';";
                    240: 	my $out=Apache::run::run($code,$safeeval);
                    241:     }
                    242:     $code = '${'.$name."}{'numlocations'}='".($order+1)."';";
1.5       albertel  243:     $out=Apache::run::run($code,$safeeval);
1.4       albertel  244: }
1.5       albertel  245: 
1.1       tsai      246: # begin to assign labels to locations
                    247: sub end_labelgroup {
1.47      albertel  248:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    249:     my $gname = $Apache::randomlabel::groupname;
                    250:     my $type  = $Apache::randomlabel::type;
                    251:     my $result='';
                    252:     if ($target eq 'web' || $target eq 'answer' || $target eq 'grade' ||
                    253: 	$target eq 'analyze') {
                    254: 	my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
                    255: 	&Apache::structuretags::shuffle(\@idx_arr);
                    256: 	for(0 .. $#Apache::randomlabel::label_arr) {
                    257: 	    my $str;
                    258: 	    my $xstr;
                    259: 	    my $ystr;
                    260: 	    my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
                    261: 	    my $x = $Apache::randomlabel::xcoord[$_];
                    262: 	    my $y = $Apache::randomlabel::ycoord[$_];
                    263: 	    my $value = $Apache::randomlabel::value[$_];
                    264: 	    if( $type eq 'text') {
                    265: 		&add_vars($gname,$_,$label,$idx_arr[$_],$value,'',$safeeval);
                    266: 		$str = 'LB'.$Apache::randomlabel::tlabel_cnt;
                    267: 		$xstr = 'X'.$Apache::randomlabel::tlabel_cnt;
                    268: 		$ystr = 'Y'.$Apache::randomlabel::tlabel_cnt;
                    269: 		$Apache::randomlabel::tlabel_cnt += 1;
                    270: 	    } elsif ( $type eq 'image') {
                    271: 		&add_vars($gname,$_,
                    272: 			  $Apache::randomlabel::description[$idx_arr[$_]],
                    273: 			  $idx_arr[$_],$value,$label,$safeeval);
                    274: 		$str = 'IMG'.$Apache::randomlabel::ilabel_cnt;
                    275: 		$xstr = 'IX'.$Apache::randomlabel::ilabel_cnt;
                    276: 		$ystr = 'IY'.$Apache::randomlabel::ilabel_cnt;
                    277: 		$Apache::randomlabel::ilabel_cnt += 1;
                    278: 	    } else {
                    279: 		&Apache::lonxml::error('Unknown type of label :'.$type.':');
                    280: 	    }
                    281: 	    if ($target eq 'web') {
                    282: 		$result .= '&'. $str  .'='.&Apache::lonnet::escape($label);
                    283: 		$result .= '&'. $xstr .'='.$x;
                    284: 		$result .= '&'. $ystr .'='.$y;
                    285: 	    }
                    286: 	}
                    287:     } elsif ($target eq 'tex') {
                    288: 	my $WX1=0; #  Web x-coord. of upper left corner (ULC)
                    289: 	my $WY1=0; #  Web y-coord. of (ULC)
                    290: 	my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
                    291: 	my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
1.50      sakharuk  292: 	my $texwidth=&adjust_textwidth(&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,-2,1));
1.49      albertel  293: 	if (!$texwidth) { $texwidth=90; }
1.47      albertel  294: 	my $TX1=0;
                    295: 	my $TY1=$texwidth*($wheight/$wwidth);
                    296: 	my $TX2=$texwidth;
                    297: 	my $TY2=0;
                    298: 
                    299: 
                    300: 	my $slopex=($wwidth-$WX1)/($TX2-$TX1);
                    301: 	my $slopey=($wheight-$WY1)/($TY2-($TY1-1.0));
                    302: 	my $cstx=$wwidth-$slopex*($TX2);
                    303: 	my $csty=$wheight-$slopey*($TY2);
                    304: 
                    305: 	my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
                    306: 	&Apache::structuretags::shuffle(\@idx_arr);
                    307: 
                    308: 	&Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
                    309: 	for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
                    310: 	    my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
                    311: 	    my $x = $Apache::randomlabel::xcoord[$i];
                    312: 	    my $y = $Apache::randomlabel::ycoord[$i];
                    313: 	    my $value = $Apache::randomlabel::value[$i];
                    314: 	    #x latex coordinate
                    315: 	    my $tcX=($x)*($texwidth/$wwidth);
                    316: 	    #y latex coordinate
                    317:             #      my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 );
                    318: 	    my $tcY=$TY1-$y*($TY1/$wheight);
                    319: 	    $tcX=sprintf('%.2f',$tcX);
                    320: 	    $tcY=sprintf('%.2f',$tcY);
                    321: 	    $result.='\put('.$tcX.','.$tcY.'){\normalsize \bf '.$label.'}'."\n";
                    322: 	    if( $type eq 'text') {
                    323: 		&add_vars($gname,$i,$label,$idx_arr[$i],$value,'',$safeeval);
                    324: 	    } elsif ( $type eq 'image') {
                    325: 		&add_vars($gname,$i,
                    326: 			  $Apache::randomlabel::description[$idx_arr[$i]],
                    327: 			  $idx_arr[$i],$value,$label,$safeeval);
                    328: 	    } else {
                    329: 		&Apache::lonxml::error('Unknown type of label :'.$type.':');
                    330: 	    }
                    331: 	}
                    332:     } elsif ($target eq 'edit') {
                    333: 	$result.=&Apache::edit::end_table;
1.3       tsai      334:     }
1.47      albertel  335:     return $result;
1.1       tsai      336: }
                    337: 
1.5       albertel  338: # <location x="123" y="456" value="some value"/>
1.1       tsai      339: sub start_location {
1.47      albertel  340:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    341:     my $x= &check_int(&Apache::lonxml::get_param('x',$parstack,$safeeval),50);
                    342:     my $y= &check_int(&Apache::lonxml::get_param('y',$parstack,$safeeval),50);
                    343:     my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
                    344:     my $result='';
                    345:     push(@Apache::randomlabel::xcoord,$x);
                    346:     push(@Apache::randomlabel::ycoord,$y);
                    347:     push(@Apache::randomlabel::value,$value);
                    348:     if ($target eq 'edit') {
                    349: 	$result.=&Apache::edit::tag_start($target,$token);
                    350: 	$result.=&Apache::edit::text_arg('X:','x',$token,4).
                    351: 	    &Apache::edit::text_arg('Y:','y',$token,4).
                    352: 	    &Apache::edit::entercoords('x','y','attribute','width','height').'&nbsp;&nbsp;&nbsp;'.
                    353: 	    &Apache::edit::text_arg('Value:','value',$token).
                    354: 	    &Apache::edit::end_row();
                    355: 	$result.=&Apache::edit::end_table;
                    356:     } elsif ($target eq 'modified') {
                    357: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    358: 						    $safeeval,'x','y','value');
                    359: 	if ($constructtag) {
                    360: 	    $result = &Apache::edit::rebuild_tag($token);
                    361: 	    $result.=&Apache::edit::handle_insert();
                    362: 	}
1.4       albertel  363:     }
1.47      albertel  364:     return $result;
1.1       tsai      365: }
                    366: 
                    367: sub end_location {
1.47      albertel  368:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    369:     my @result;
                    370:     if ($target eq 'edit') { @result=('','no') }
                    371:     return @result;
1.1       tsai      372: }
                    373: 
1.2       tsai      374: # <label>$var_abc</label>
1.1       tsai      375: sub start_label {
1.47      albertel  376:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    377:     my $result='';
                    378:     my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
                    379:     if ($target eq 'web' || $target eq 'tex' ||
                    380: 	$target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
                    381: 	my $ltext=&Apache::lonxml::get_all_text("/label",$parser);
                    382: 	$ltext=&Apache::run::evaluate($ltext,$safeeval,$$parstack[-1]);
                    383: 	if ($type eq 'image') {
                    384: 	    &Apache::lonxml::debug("Turning $ltext, $Apache::lonxml::pwd[-1]");
                    385: 	    $ltext=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],
                    386: 						 $ltext);
                    387: 	    &Apache::lonxml::debug("into $ltext");
                    388: 	    my $description = &Apache::lonxml::get_param('description',
                    389: 							 $parstack,$safeeval);
                    390: 	    push(@Apache::randomlabel::description,$description);
                    391: 	}
                    392: 	push(@Apache::randomlabel::label_arr,$ltext);
                    393:     } elsif ($target eq 'edit') {
                    394: 	$result.=&Apache::edit::tag_start($target,$token,"$type Label");
                    395: 	my $text=&Apache::lonxml::get_all_text("/label",$parser);
                    396: 	if ($type eq 'image') {
                    397: 	    $result.=&Apache::edit::end_row().
                    398: 		&Apache::edit::start_spanning_row();
                    399: 	    $result.=&Apache::edit::text_arg('Description:','description',
                    400: 					     $token);
                    401: 	}
                    402: 	if ($type eq 'text') { $result.="Label Text:"; }
                    403: 	if ($type eq 'image') { $result.="Path to image:&nbsp;"; }
                    404: 	$result.=&Apache::edit::editline('',$text,'',50).
                    405: 	    &Apache::edit::end_table();
                    406:     } elsif ($target eq 'modified') {
                    407: 	$result = '<label>';
                    408: 	if ($type eq 'image') {
                    409: 	    my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    410: 							 $safeeval,
                    411: 							 'description');
                    412: 	    if ($constructtag) {
                    413: 		$result = &Apache::edit::rebuild_tag($token);
                    414: 	    } else {
                    415: 		$result = $token->[4];
                    416: 	    }
                    417: 	}
1.52    ! albertel  418: 	$result.=&Apache::edit::modifiedfield("/label",$parser);
1.26      albertel  419:     }
1.47      albertel  420:     return $result;
1.1       tsai      421: }
                    422: 
                    423: sub end_label {
1.47      albertel  424:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    425:     my @result;
                    426:     if ($target eq 'edit') { @result=('','no') }
                    427:     return @result;
1.1       tsai      428: }
                    429: 
                    430: 1;
                    431: __END__
                    432:  

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