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Up to [LON-CAPA] / loncom / homework

- renders text labelgroups to the web and tex targets well
- renders image labelgroups to web and tex poorly
- edit of <randomlabel>, <labelgroup>, <label>, <location> working well.

    1: # The LearningOnline Network with CAPA
    2: # random labelling tool
    3: # 7/20/2001 Isaac Tsai, initial syntax
    4: # 8/10/2001 Isaac Tsai, 
    5: # 8/30/2001 Isaac Tsai, 
    6: # SYNTAX:
    7: # <randomlabel bgimg="URL" width="12" height="45" texwidth="50">
    8: #    <labelgroup name="GroupOne" type="image">
    9: #      <location x="123" y="456" />
   10: #      <location x="321" y="654" />
   11: #      <location x="213" y="546" />
   12: #      <label description="TEXT-1">IMG-URL</label>
   13: #      <label description="TEXT-2">IMG-URL</label>
   14: #      <label description="TEXT-3">IMG-URL</label>
   15: #    </labelgroup>
   16: #    <labelgroup name="GroupTwo" type="text">
   17: #      <location x="12" y="45" />
   18: #      <location x="32" y="65" />
   19: #      <location x="21" y="54" />
   20: #      <label>TEXT-1</label>
   21: #      <label>TEXT-2</label>
   22: #      <label>TEXT-3</label>
   23: #    </labelgroup>
   24: #   </randomlabel>
   25: #  ===========================================
   26: #  side effect:
   27: #    location (123,456): $GroupOne[0] = 2  # images give out indexes
   28: #             (321,654): $GroupOne[1] = 1
   29: #             (213,546): $GroupOne[2] = 0
   30: #    location (12,45)  : $GroupTwo[0] = "TEXT-3"
   31: #             (32,65)  : $GroupTwo[1] = "TEXT-1"
   32: #             (21,54)  : $GroupTwo[2] = "TEXT-2"
   33: #  ===========================================
   34: package Apache::randomlabel;
   35: use strict;
   36: 
   37: sub BEGIN {
   38:   &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label'));
   39: }
   40: 
   41: sub start_randomlabel {
   42:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   43:   my $result='';
   44:   my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
   45:   my $code = &Apache::lonxml::get_param('code',$parstack,$safeeval);
   46:   my $codebase = &Apache::lonxml::get_param('codebase',$parstack,$safeeval);
   47:   my $w= &Apache::lonxml::get_param('width',$parstack,$safeeval);
   48:   my $h= &Apache::lonxml::get_param('height',$parstack,$safeeval);
   49:   my $texwidth= &Apache::lonxml::get_param('texwidth',$parstack,$safeeval);
   50:   if (!$code) { $code='GLabel.class'; }
   51:   if (!$codebase) { $codebase='/res/adm/includes/'; }
   52:   $Apache::randomlabel::tlabel_cnt=0;
   53:   $Apache::randomlabel::ilabel_cnt=0;
   54:   if ($target eq 'web') {
   55:     $result.="<applet code=\"$code\" codebase=\"$codebase\" width=\"$w\" height=\"$h\">";
   56:     $result.="<param name=\"bgimg\" value=\"$bgimg\">";
   57:   } elsif ($target eq 'tex') {
   58:     $bgimg=~s/(.gif|.jpg)$/.ps/;
   59:     $result.='\vspace*{2mm} \\ \noindent \epsfxsize='.$texwidth.' \epsffile{'.
   60:       $bgimg.'}\setlength{\unitlength}{1mm} \\ \begin{picture}(0,0)(0,-5)';
   61:   } elsif ($target eq 'edit') {
   62:     $result.=&Apache::edit::tag_start($target,$token);
   63:     $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).'<br />'.
   64:       &Apache::edit::text_arg('Width(pixel):','width',$token,4).
   65: 	&Apache::edit::text_arg('Height(pixel):','height',$token,4).
   66: 	  &Apache::edit::text_arg('TeXWidth(mm):','texwidth',$token,4).
   67: 	    '</td></tr><tr><td colspan="3">';
   68:   } elsif ($target eq 'modified') {
   69:     my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
   70: 						 'bgimg','width','height',
   71: 						 'texwidth');
   72:     if ($constructtag) {
   73:       $result = &Apache::edit::rebuild_tag($token);
   74:       $result.=&Apache::edit::handle_insert();
   75:     }
   76:   }
   77:   return $result;
   78: }
   79: 
   80: sub end_randomlabel {
   81:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   82:   my $result='';
   83:   my $count;
   84: 
   85: 
   86:   if ($target eq 'web') {
   87:     $count = $Apache::randomlabel::tlabel_cnt;
   88:     if( $count != 0) { $result.= "<param name=\"count\" value=\"$count\">"; }
   89:     $count = $Apache::randomlabel::ilabel_cnt;
   90:     if( $count != 0) { $result.= "<param name=\"icount\" value=\"$count\">"; }
   91:     $result .= "</applet><BR />";
   92:   } elsif ($target eq 'tex') {
   93:     $result='\end{picture}';
   94:   } elsif ($target eq 'edit') {
   95:     $result.=&Apache::edit::end_table;
   96:   }
   97:   return $result;
   98: }
   99: 
  100: sub start_labelgroup {
  101:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  102:   my $result='';
  103:   my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
  104:   my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
  105:   $type =~tr/A-Z/a-z/;
  106:   if ($target eq 'web' || $target eq 'tex') {
  107:     $Apache::randomlabel::groupname=$name;
  108:     $Apache::randomlabel::type=$type;
  109:     @Apache::randomlabel::xcoord = ();
  110:     @Apache::randomlabel::ycoord = ();
  111:     @Apache::randomlabel::label_arr  = ();
  112:   } elsif ($target eq 'edit') {
  113:     $result.=&Apache::edit::tag_start($target,$token);
  114:     $result.=&Apache::edit::text_arg('Name:','name',$token).
  115:       &Apache::edit::select_arg('Type:','type',['text','image'],$token).
  116: 	'</td></tr><tr><td colspan="3">';
  117:   } elsif ($target eq 'modified') {
  118:     my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
  119: 						 'name','type');
  120:     if ($constructtag) {
  121:       $result = &Apache::edit::rebuild_tag($token);
  122:       $result.=&Apache::edit::handle_insert();
  123:     }
  124:   }
  125:   return $result;
  126: }
  127: 
  128: sub add_var {
  129:   my ($name,$value,$type,$safeeval) = @_;
  130:   if ($type eq 'array') {
  131:     my $code = 'push(@'.$name.',\''.$value.'\');';
  132:     my $out=Apache::run::run($code,$safeeval);
  133:   } else {
  134:     &Apache::lonxml::error('Unsupported add_var type :'.$type.':');
  135:   }
  136: }
  137: # begin to assign labels to locations
  138: sub end_labelgroup {
  139:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  140:   my $gname = $Apache::randomlabel::groupname;
  141:   my $type  = $Apache::randomlabel::type;
  142:   my $result='';
  143:   if ($target eq 'web') {
  144:     my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
  145:     &Apache::structuretags::shuffle(\@idx_arr);
  146:     for(0 .. $#Apache::randomlabel::label_arr) {
  147:       my $str;
  148:       my $xstr;
  149:       my $ystr;
  150:       my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
  151:       if( $type eq 'text') {
  152: 	&add_var($gname,$label,'array',$safeeval);
  153: 	$str = 'LB'.$Apache::randomlabel::tlabel_cnt;
  154: 	$xstr = 'X'.$Apache::randomlabel::tlabel_cnt;
  155: 	$ystr = 'Y'.$Apache::randomlabel::tlabel_cnt;
  156: 	$Apache::randomlabel::tlabel_cnt += 1;
  157:       } elsif ( $type eq 'image') {
  158: 	&add_var($gname,$idx_arr[$_],'array',$safeeval);
  159: 	$str = 'LB'.$Apache::randomlabel::ilabel_cnt;
  160: 	$xstr = 'X'.$Apache::randomlabel::ilabel_cnt;
  161: 	$ystr = 'Y'.$Apache::randomlabel::ilabel_cnt;
  162: 	$Apache::randomlabel::ilabel_cnt += 1;
  163:       } else {
  164: 	&Apache::lonxml::error('Unknown type of label :'.$type.':');
  165:       }
  166:       my $x = $Apache::randomlabel::xcoord[$_];
  167:       my $y = $Apache::randomlabel::ycoord[$_];
  168:       $result .= '<param name="' . $str  . '" value="'.$label.'">';
  169:       $result .= '<param name="' . $xstr . '" value="'.$x.'">';
  170:       $result .= '<param name="' . $ystr . '" value="'.$y.'">';
  171:     }
  172:   } elsif ($target eq 'tex') {
  173:     my $WX1=0; #  Web x-coord. of upper left corner (ULC)
  174:     my $WY1=0; #  Web y-coord. of (ULC)
  175:     my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
  176:     my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
  177:     my $texwidth=&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,-2);
  178:     my $TX1=0;
  179:     my $TY1=$texwidth*($wheight/$wwidth);
  180:     my $TX2=$texwidth;
  181:     my $TY2=0;
  182: 
  183: 
  184:     my $slopex=($wwidth-$WX1)/($TX2-$TX1);
  185:     my $slopey=($wheight-$WY1)/($TY2-($TY1-1.0));
  186:     my $cstx=$wwidth-$slopex*($TX2);
  187:     my $csty=$wheight-$slopey*($TY2);
  188: 
  189:     my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
  190:     &Apache::structuretags::shuffle(\@idx_arr);
  191: 
  192:     &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
  193:     for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
  194:       my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
  195:       my $x = $Apache::randomlabel::xcoord[$i];
  196:       my $y = $Apache::randomlabel::ycoord[$i];
  197:       my $tcX=$x*($texwidth/$wwidth);
  198:       my $tcY=$TY1-$y*($TY1/$wheight)-2;
  199:       $tcX=sprintf('%.2f',$tcX);
  200:       $tcY=sprintf('%.2f',$tcY);
  201:       $result.='\put('.$tcX.','.$tcY.'){\normalsize \bf '.$label.'}'."\n";
  202:       if( $type eq 'text') {
  203: 	&add_var($gname,$label,'array',$safeeval);
  204:       } elsif ( $type eq 'image') {
  205: 	&add_var($gname,$idx_arr[$i],'array',$safeeval);
  206:       } else {
  207: 	&Apache::lonxml::error('Unknown type of label :'.$type.':');
  208:       }
  209:     }
  210:   } elsif ($target eq 'edit') {
  211:     $result.=&Apache::edit::end_table;
  212:   }
  213:   return $result;
  214: }
  215: 
  216: # <location x=123 y=456 />
  217: sub start_location {
  218:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  219:   my $x= &Apache::lonxml::get_param('x',$parstack,$safeeval);
  220:   my $y= &Apache::lonxml::get_param('y',$parstack,$safeeval);
  221:   my $result='';
  222:   push(@Apache::randomlabel::xcoord,$x);
  223:   push(@Apache::randomlabel::ycoord,$y);
  224:   if ($target eq 'edit') {
  225:     $result.=&Apache::edit::tag_start($target,$token);
  226:     $result.=&Apache::edit::text_arg('X:','x',$token,4).
  227:       &Apache::edit::text_arg('Y:','y',$token,4).
  228: 	'</td></tr><tr><td colspan="3">';
  229:     $result.=&Apache::edit::end_table;
  230:   } elsif ($target eq 'modified') {
  231:     my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
  232: 						 'x','y');
  233:     if ($constructtag) {
  234:       $result = &Apache::edit::rebuild_tag($token);
  235:       $result.=&Apache::edit::handle_insert();
  236:     }
  237:   }
  238:   return $result;
  239: }
  240: 
  241: sub end_location {
  242:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  243:   my @result;
  244:   if ($target eq 'edit') { @result=('','no') }
  245:   return @result;
  246: }
  247: 
  248: # <label>$var_abc</label>
  249: sub start_label {
  250:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  251:   my $result='';
  252:   if ($target eq 'web' || $target eq 'tex') {
  253:     my $ltext=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
  254:     push(@Apache::randomlabel::label_arr,$ltext);
  255:   } elsif ($target eq 'edit') {
  256:     $result.=&Apache::edit::tag_start($target,$token);
  257:     my $text=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
  258:     $result.='</td></tr><tr><td colspan="3">'.
  259:       &Apache::edit::editfield('',$text,'',20,1).
  260: 	&Apache::edit::end_table();
  261:   } elsif ($target eq 'modified') {
  262:     my $text=$$parser[-1]->get_text("/label");
  263:     $result.=&Apache::edit::modifiedfield($token);
  264:   }
  265:   return $result;
  266: }
  267: 
  268: sub end_label {
  269:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  270:   my @result;
  271:   if ($target eq 'edit') { @result=('','no') }
  272:   return @result;
  273: }
  274: 
  275: 
  276: 
  277: 1;
  278: __END__
  279: