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Diff for /loncom/homework/edit.pm between versions 1.12 and 1.49

version 1.12, 2001/06/16 20:33:33 version 1.49, 2003/05/06 11:54:08
Line 1 Line 1
 # The LearningOnline Network with CAPA   # The LearningOnline Network with CAPA 
 # edit mode helpers  # edit mode helpers
   #
   # $Id$
   #
   # Copyright Michigan State University Board of Trustees
   #
   # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   #
   # LON-CAPA is free software; you can redistribute it and/or modify
   # it under the terms of the GNU General Public License as published by
   # the Free Software Foundation; either version 2 of the License, or
   # (at your option) any later version.
   #
   # LON-CAPA is distributed in the hope that it will be useful,
   # but WITHOUT ANY WARRANTY; without even the implied warranty of
   # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   # GNU General Public License for more details.
   #
   # You should have received a copy of the GNU General Public License
   # along with LON-CAPA; if not, write to the Free Software
   # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   #
   # /home/httpd/html/adm/gpl.txt
   #
   # http://www.lon-capa.org/
   #
 # 3/20 Guy  # 3/20 Guy
   # 01/10/02 Matthew
   # 03/06/02 Matthew
 package Apache::edit;   package Apache::edit; 
   
 use strict;  use strict;
 use Apache::lonnet;  use Apache::lonnet();
   use HTML::Entities();
   
 # Global Vars  # Global Vars
 # default list of colors to use in editing  # default list of colors to use in editing
 @Apache::edit::colorlist=('#ffffff','#ff0000','#00ff00','#0000ff','#0ff000','#000ff0','#f0000f');  @Apache::edit::colorlist=('#ffffff','#ff0000','#00ff00','#0000ff','#0ff000','#000ff0','#f0000f');
 # depth of nesting of edit  # depth of nesting of edit
 $Apache::edit::colordepth=0;  $Apache::edit::colordepth=0;
   @Apache::edit::inserttag=();
   # image-type responses: active background image and curdepth at definition
   $Apache::edit::bgimgsrc='';
   $Apache::edit::bgimgsrccurdepth='';
   
 sub initialize_edit {  sub initialize_edit {
   $Apache::edit::colordepth=0;    $Apache::edit::colordepth=0;
     @Apache::edit::inserttag=();
 }  }
   
 sub tag_start {  sub tag_start {
Line 21  sub tag_start { Line 54  sub tag_start {
   my $result='';    my $result='';
   if ($target eq "edit") {    if ($target eq "edit") {
     my $tag=$token->[1];      my $tag=$token->[1];
     if (!$description) { $description="<$tag>"; }      if (!$description) {
         $description=&Apache::lonxml::description($token);
         if (!$description) { $description="<$tag>"; }
       }
     $result.= &start_table($token)."<tr><td>$description</td>      $result.= &start_table($token)."<tr><td>$description</td>
 <td>Delete:".  <td>Delete".
   &deletelist($target,$token)    &deletelist($target,$token)
   ."</td>    ."</td>
 <td>".  <td>".
   &insertlist($target,$token).      &insertlist($target,$token).&end_row().&start_spanning_row();
     "</td>  #<td>". 
 </tr><tr><td colspan=\"3\">\n";  #  &movebuttons($target,$token).
   #    "</tr><tr><td colspan=\"3\">\n";
   }    }
   return $result;    return $result;
 }  }
Line 40  sub tag_end { Line 77  sub tag_end {
   if ($target eq 'edit') {    if ($target eq 'edit') {
     my $tag=$token->[1];      my $tag=$token->[1];
     if (!defined($description)) {      if (!defined($description)) {
       $result.="</td></tr><tr><td>&lt;/$tag&gt;";        $result.="</td></tr><tr><td>&lt;/$tag&gt;</td><td colspan=\"2\">&nbsp;</td>";
     } else {      } else {
       if ($description ne '') { $result.="</td></tr><tr><td>$description"; }        if ($description ne '') { $result.="</td></tr><tr><td>$description</td><td colspan=\"2\">&nbsp;</td>"; }
     }      }
     $result.="</tr>".&end_table()."\n";      $result.="</tr>".&end_table()."\n";
   }    }
Line 54  sub start_table { Line 91  sub start_table {
   my $tag = $token->[1];    my $tag = $token->[1];
   my $tagnum;    my $tagnum;
   foreach my $namespace (reverse @Apache::lonxml::namespace) {    foreach my $namespace (reverse @Apache::lonxml::namespace) {
     my $testtag=$Apache::lonxml::namespace['-1'].'::'.$tag;      my $testtag=$namespace.'::'.$tag;
     $tagnum=$Apache::lonxml::insertlist{"$testtag.num"};      $tagnum=$Apache::lonxml::insertlist{"$testtag.num"};
     if (defined($tagnum)) { last; }      if (defined($tagnum)) { last; }
   }    }
Line 64  sub start_table { Line 101  sub start_table {
     $color = $Apache::edit::colorlist[$Apache::edit::colordepth];      $color = $Apache::edit::colorlist[$Apache::edit::colordepth];
   }    }
   $Apache::edit::colordepth++;    $Apache::edit::colordepth++;
   my $result="<table bgcolor=\"$color\" width=\"100%\" border=\"5\">";    push(@Apache::edit::inserttag,$token->[1]);
     my $result='<div align="right">';
     $result.='<table bgcolor="'.$color.'" width="97%" border="0" cellspacing="5" cellpadding="3">';
   return $result;    return $result;
 }  }
   
 sub end_table {  sub end_table {
   $Apache::edit::colordepth--;    $Apache::edit::colordepth--;
   my $result="</table>";    my $result='</table></div>';
     $result.="<table><tr><td>";
   
     my ($tagname,$closingtag);
     if (defined($Apache::edit::inserttag[-2])) {
       $tagname=$Apache::edit::inserttag[-2];
     } else {$tagname='problem';}
     if (defined($Apache::edit::inserttag[-1])) {
       $closingtag=$Apache::edit::inserttag[-1];
     }
     $result.=&innerinsertlist('edit',$tagname,$closingtag).
       "</td></tr></table>";
     pop(@Apache::edit::inserttag);
     return $result;
   }
   
   sub start_spanning_row { return '<tr><td colspan="3" bgcolor="#DDDDDD">';}
   sub start_row          { return '<tr><td bgcolor="#DDDDDD">';            }
   sub end_row            { return '</td></tr>';          }
   
   sub movebuttons {
     my ($target,$token) = @_;
     my $result='<input type="submit" name="moveup.'.
       $Apache::lonxml::curdepth.'" value="Move Up" />';
     $result.='<input type="submit" name="movedown.'.
       $Apache::lonxml::curdepth.'" value="Move Down" />';
   return $result;    return $result;
 }  }
   
 sub deletelist {  sub deletelist {
   my ($target,$token) = @_;    my ($target,$token) = @_;
   my $result = "<select name=\"delete_$Apache::lonxml::curdepth\">    my $result = "<select name=\"delete_$Apache::lonxml::curdepth\">
 <option>Nothing</option>  <option></option>
 <option>Tag</option>  <option>Yes</option>
 <option>Subtags</option>  
 </select>";  </select>";
   return $result;    return $result;
 }  }
   
   sub handle_delete {
     if (!$ENV{"form.delete_$Apache::lonxml::curdepth"}) { return ''; }
     my ($space,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result=0;
     if ($space) {
       my $sub1="$space\:\:delete_$token->[1]";
       {
         no strict 'refs';
         if (defined &$sub1) {
    $result=&$sub1($target,$token,$tagstack,$parstack,$parser,$safeeval,$style);
         }
       }
     }
     if (!$result) {
       my $endtag='/'.$token->[1];
       my $bodytext=&Apache::lonxml::get_all_text($endtag,$parser);
       $$parser['-1']->get_token();
       &Apache::lonxml::debug("Deleting :$bodytext: for $token->[1]");
       &Apache::lonxml::end_tag($tagstack,$parstack,$token);
     }
     return 1;
   }
   
 sub get_insert_list {  sub get_insert_list {
   my ($token) = @_;    my ($tagname) = @_;
   my $result='';    my $result='';
   my @tagnums= ();    my @tagnums= ();
   #&Apache::lonxml::debug("keys ".join("\n",sort(keys(%Apache::lonxml::insertlist))));    #&Apache::lonxml::debug("keys ".join("\n",sort(keys(%Apache::lonxml::insertlist))));
   if ($Apache::lonxml::insertlist{"$token->[1].which"}) {    if ($Apache::lonxml::insertlist{"$tagname.which"}) {
     push (@tagnums, @{ $Apache::lonxml::insertlist{"$token->[1].which"} });      push (@tagnums, @{ $Apache::lonxml::insertlist{"$tagname.which"} });
   }    }
   foreach my $namespace (@Apache::lonxml::namespace) {    foreach my $namespace (@Apache::lonxml::namespace) {
     if ($Apache::lonxml::insertlist{"$namespace".'::'."$token->[1].which"}) {      if ($Apache::lonxml::insertlist{"$namespace".'::'."$tagname.which"}) {
       push (@tagnums, @{ $Apache::lonxml::insertlist{"$namespace".'::'."$token->[1].which"} });        push (@tagnums, @{ $Apache::lonxml::insertlist{"$namespace".'::'."$tagname.which"} });
     }      }
   }    }
   if (@tagnums) {    if (@tagnums) {
       my %options;
     foreach my $tagnum (@tagnums) {      foreach my $tagnum (@tagnums) {
       $result.='<option value="'.$tagnum.'">'.$Apache::lonxml::insertlist{"$tagnum.description"}."</option>\n";        my $descrip=$Apache::lonxml::insertlist{"$tagnum.description"};
         $options{$descrip} ="<option value=\"$tagnum\">".$descrip."</option>\n";
     }      }
       foreach my $option (sort(keys(%options))) { $result.=$options{$option}; }
     if ($result) { $result='<option selected="on"></option>'.$result; }      if ($result) { $result='<option selected="on"></option>'.$result; }
   }    }
   return $result;    return $result;
Line 108  sub get_insert_list { Line 197  sub get_insert_list {
   
 sub insertlist {  sub insertlist {
   my ($target,$token) = @_;    my ($target,$token) = @_;
     return &innerinsertlist($target,$token->[1]);
   }
   
   sub innerinsertlist {
     my ($target,$tagname,$closingtag) = @_;
   my $result;    my $result;
     my $after='';
     if ($closingtag) {
        $after='_after_'.$closingtag; 
     }
   if ($target eq 'edit') {    if ($target eq 'edit') {
     my $optionlist= &get_insert_list($token);      my $optionlist= &get_insert_list($tagname);
     if ($optionlist) {      if ($optionlist) {
       $result = "Insert:        $result = "Insert:
 <select name=\"insert_$Apache::lonxml::curdepth\">  <select name=\"insert$after\_$Apache::lonxml::curdepth\">
 $optionlist  $optionlist
 </select>"  </select>"
     } else {      } else {
Line 124  $optionlist Line 222  $optionlist
 }  }
   
 sub handle_insert {  sub handle_insert {
   if (!$ENV{"form.insert_$Apache::lonxml::curdepth"}) { return ''; }    if ($ENV{"form.insert_$Apache::lonxml::curdepth"} eq '') { return ''; }
   my $result;    my $result;
   my $tagnum = $ENV{"form.insert_$Apache::lonxml::curdepth"};    my $tagnum = $ENV{"form.insert_$Apache::lonxml::curdepth"};
   my $func=$Apache::lonxml::insertlist{"$tagnum.function"};    my $func=$Apache::lonxml::insertlist{"$tagnum.function"};
Line 134  sub handle_insert { Line 232  sub handle_insert {
     if ($newtag =~ /::/) { ($namespace,$newtag) = split(/::/,$newtag); }      if ($newtag =~ /::/) { ($namespace,$newtag) = split(/::/,$newtag); }
     $result.="\n<$newtag>\n</$newtag>";      $result.="\n<$newtag>\n</$newtag>";
   } else {    } else {
     {      if (defined(&$func)) {
       no strict 'refs';        {
       $result.=&$func();   no strict 'refs';
    $result.=&$func();
         }
       } else {
         my $newtag=$Apache::lonxml::insertlist{"$tagnum.tag"};
         &Apache::lonxml::error("Unable to insert tag $newtag, $func was not defined.");
     }      }
   }    }
   return $result;    return $result;
 }  }
   
   sub handle_insertafter {
     my $tagname=shift;
     if ($ENV{"form.insert_after_$tagname\_$Apache::lonxml::curdepth"} eq '')
        { return ''; }
     my $result;
     my $tagnum =$ENV{"form.insert_after_$tagname\_$Apache::lonxml::curdepth"};
     my $func=$Apache::lonxml::insertlist{"$tagnum.function"};
     if ($func eq 'default') {
       my $newtag=$Apache::lonxml::insertlist{"$tagnum.tag"};
       my $namespace;
       if ($newtag =~ /::/) { ($namespace,$newtag) = split(/::/,$newtag); }
       $result.="\n<$newtag>\n</$newtag>";
     } else {
       if (defined(&$func)) {
         {
    no strict 'refs';
    $result.=&$func();
         }
       } else {
         my $newtag=$Apache::lonxml::insertlist{"$tagnum.tag"};
         &Apache::lonxml::error("Unable to insert (after) tag $newtag, $func was not defined. ($tagname $tagnum)");
       }
     }
     return $result;
   }
   
   sub insert_responseparam {
     return '
       <responseparam />';
   }
   
   sub insert_formularesponse {
     return '
   <formularesponse answer="" samples="">
       <textline />
       <hintgroup>
       </hintgroup>
   </formularesponse>';
   }
   
   sub insert_numericalresponse {
     return '
   <numericalresponse answer="">
       <textline />
       <hintgroup>
       </hintgroup>
   </numericalresponse>';
   }
   
   sub insert_stringresponse {
     return '
   <stringresponse answer="" type="">
       <textline />
       <hintgroup>
       </hintgroup>
   </stringresponse>';
   }
   
   sub insert_essayresponse {
     return '
   <essayresponse>
       <textfield></textfield>
   </essayresponse>';
   }
   
 sub insert_optionresponse {  sub insert_optionresponse {
   return '    return '
 <optionresponse max="10">  <optionresponse max="10">
     <foilgroup options="">      <foilgroup options="">
     </foilgroup>      </foilgroup>
       <hintgroup>
       </hintgroup>
 </optionresponse>';  </optionresponse>';
 }  }
   
 sub editfield {  sub insert_radiobuttonresponse {
   my ($tag,$data,$description,$minwidth,$minheight)=@_;    return '
     <radiobuttonresponse max="10">
       <foilgroup>
       </foilgroup>
       <hintgroup>
       </hintgroup>
   </radiobuttonresponse>';
   }
   
   sub insert_rankresponse {
     return '
   <rankresponse max="10">
       <foilgroup options="">
       </foilgroup>
       <hintgroup>
       </hintgroup>
   </rankresponse>';
   }
   
   sub insert_matchresponse {
     return '
   <matchresponse max="10">
       <foilgroup options="">
         <itemgroup>
         </itemgroup>
       </foilgroup>
       <hintgroup>
       </hintgroup>
   </matchresponse>';
   }
   
   sub insert_displayduedate { return '<displayduedate />'; }
   sub insert_displaytitle   { return '<displaytitle />'; }
   sub insert_hintpart {
     return '
   <hintpart on="default">
       <startouttext/>
       <endouttext />
   </hintpart>';
   }
   
   sub insert_numericalhint {
     return '
   <numericalhint>
   </numericalhint>';
   }
   
   sub insert_stringhint {
     return '
   <stringhint>
   </stringhint>';
   }
   
   sub insert_formulahint {
     return '
   <formulahint>
   </formulahint>';
   }
   
   sub insert_radiobuttonhint {
     return '
   <radiobuttonhint>
   </radiobuttonhint>';
   }
   
   sub insert_startouttext {
     return "<startouttext />\n<endouttext />";
   }
   
   sub insert_script {
     return "\n<script type=\"loncapa/perl\">\n</script>";
   }
   
   sub textarea_sizes {
     my ($data)=@_;
   my $count=0;    my $count=0;
   my $maxlength=-1;    my $maxlength=-1;
   map { $count++;    foreach (split ("\n", $$data)) { $count++;
  if (length($_) > $maxlength) { $maxlength = length ($_); }   if (length($_) > $maxlength) { $maxlength = length($_); }
       } split ("\n", $data);        }
   if ($maxlength > 80) { $maxlength = 80; }    my $rows = $count;
   if ($maxlength < $minwidth) { $maxlength = $minwidth; }    my $cols = $maxlength;
   if ( $count < $minheight) { $count = $minheight; }    return ($rows,$cols);
   if ($description) {  }
     $description="<br />".$description."<br />";  
   }  sub editline {
   return "$description\n&nbsp;&nbsp;&nbsp;<textarea rows=\"$count\" cols=\"$maxlength\" name=homework_edit_".$Apache::lonxml::curdepth.">$data</textarea>\n";      my ($tag,$data,$description,$size)=@_;
 #  return "<br />\n&lt;$tag&gt;<br />\n&nbsp;&nbsp;&nbsp;<textarea rows=\"$count\" cols=\"$maxlength\" name=homework_edit_".$Apache::lonxml::curdepth.">$data</textarea><br />\n&lt;/$tag&gt;<br />\n";      $data=&HTML::Entities::encode($data);
       if ($description) { $description="<br />".$description."<br />"; }
       my $result = <<"END";
   $description
   <input type="text" name="homework_edit_$Apache::lonxml::curdepth" 
          value="$data" size="$size" />
   END
       return $result;
   }
   
   sub editfield {
     my ($tag,$data,$description,$minwidth,$minheight)=@_;
   
     my ($rows,$cols)=&textarea_sizes(\$data);
     if ($cols > 80) { $cols = 80; }
     if ($cols < $minwidth ) { $cols = $minwidth; }
     if ($rows < $minheight) { $rows = $minheight; }
     if ($description) { $description="<br />".$description."<br />"; }
     return $description."\n".'&nbsp;&nbsp;&nbsp;<textarea rows="'.$rows.
       '" cols="'.$cols.'" name="homework_edit_'.$Apache::lonxml::curdepth.'">'.
         &HTML::Entities::encode($data).'</textarea>'."\n";
 }  }
   
 sub modifiedfield {  sub modifiedfield {
Line 177  sub modifiedfield { Line 440  sub modifiedfield {
 #  &Apache::lonxml::debug("I want homework_edit_$Apache::lonxml::curdepth");  #  &Apache::lonxml::debug("I want homework_edit_$Apache::lonxml::curdepth");
 #  &Apache::lonxml::debug($ENV{"form.homework_edit_$Apache::lonxml::curdepth"});  #  &Apache::lonxml::debug($ENV{"form.homework_edit_$Apache::lonxml::curdepth"});
   $result=$ENV{"form.homework_edit_$Apache::lonxml::curdepth"};    $result=$ENV{"form.homework_edit_$Apache::lonxml::curdepth"};
   if (defined $token) {  
     if (defined $token->[4]) {  
       $result=$token->[4].$result;  
     } else {  
       $result=$result.$token->[2];  
     }  
   }  
   return $result;    return $result;
 }  }
   
 sub insert_startouttext {  # Returns a 1 if the token has been modified and you should rebuild the tag
   return "\n<startouttext />\n<endouttext />";  
 }  
   
 # Returns a 1 if the toekn has been modified and you should rebuild the tag  
 # side-effects, will modify the $token if new values are found  # side-effects, will modify the $token if new values are found
 sub get_new_args {  sub get_new_args {
   my ($token,$parstack,$safeeval,@args)=@_;    my ($token,$parstack,$safeeval,@args)=@_;
   my $rebuild=0;    my $rebuild=0;
   foreach my $arg (@args) {    foreach my $arg (@args) {
     my $value=&Apache::lonxml::get_param($arg,$parstack,$safeeval);      #just want the string that it was set to
     my $newvalue=$ENV{"form.$Apache::lonxml::curdepth.$arg"};      my $value=$token->[2]->{$arg};
       my $element=&html_element_name($arg);
       my $newvalue=$ENV{"form.$element"};
     &Apache::lonxml::debug(" for:$arg: cur is :$value: new is :$newvalue:");      &Apache::lonxml::debug(" for:$arg: cur is :$value: new is :$newvalue:");
     if ($value ne $newvalue) {      if ($value ne $newvalue) {
       $token->[2]->{$arg}=$newvalue;        $token->[2]->{$arg}=$newvalue;
Line 208  sub get_new_args { Line 462  sub get_new_args {
   return $rebuild;    return $rebuild;
 }  }
   
   # looks for /> on start tags
 sub rebuild_tag {  sub rebuild_tag {
   my ($token) = @_;    my ($token) = @_;
   my $result;    my $result;
   if ($token->[0] eq 'S') {    if ($token->[0] eq 'S') {
     $result = '<'.$token->[1];      $result = '<'.$token->[1];
     while (my ($key,$val)= each(%{$token->[2]})) {      while (my ($key,$val)= each(%{$token->[2]})) {
         $val=~s:^\s+|\s+$::g;
         $val=~s:"::g; #"
       &Apache::lonxml::debug("setting :$key: to  :$val:");        &Apache::lonxml::debug("setting :$key: to  :$val:");
       $result.=' '.$key.'="'.$val.'"';        $result.=' '.$key.'="'.$val.'"';
     }      }
     $result.=">";      if ($token->[4] =~ m:/>$:) {
         $result.=' />';
       } else {
         $result.='>';
       }
   } elsif ( $token->[0] eq 'E' ) {    } elsif ( $token->[0] eq 'E' ) {
     $result = '</'.$token->[1].'>';      $result = '</'.$token->[1].'>';
   }    }
   return $result;    return $result;
 }  }
   
   sub html_element_name {
       my ($name) = @_;
       return $name.'_'.$Apache::lonxml::curdepth;
   }
   
   sub hidden_arg {
       my ($name,$token) = @_;
       my $result;
       my $arg=$token->[2]{$name};
       $result='<input name="'.&html_element_name($name).
    '" type="hidden" value="'.$arg.'" />';
       return $result;
   }
   
   sub text_arg {
     my ($description,$name,$token,$size) = @_;
     my $result;
     if (!defined $size) { $size=20; }
     my $arg=$token->[2]{$name};
     $result=$description.'&nbsp;<input name="'.&html_element_name($name).
       '" type="text" value="'.$arg.'" size="'.$size.'" />';
     return $result;
   }
   
   sub select_arg {
       my ($description,$name,$list,$token) = @_;
       my $result;
       my $optionlist="";
       my $selected=$token->[2]{$name};
       foreach my $option (@$list) {
    my $value;
    if ( ref($option) eq 'ARRAY') {
       $value='value="'.$$option[0].'"';
       $option=$$option[1];
    } else {
       $value='value="'.$option.'"';
    }
    if ( $selected eq $option ) {
       $optionlist.="<option $value selected=\"on\">$option</option>\n";
    } else {
       $optionlist.="<option $value >$option</option>\n";
    }
       }
       $result.=$description.'&nbsp;<select name="'.&html_element_name($name).
           '">
          '.$optionlist.'
         </select>';
       return $result;
   }
   
   sub select_or_text_arg {
       my ($description,$name,$list,$token,$size) = @_;
       my $result;
       my $optionlist="";
       my $found=0;
       my $selected=$token->[2]{$name};
       foreach my $option (@$list) {
    my $value;
    if ( ref($option) eq 'ARRAY') {
       $value='value="'.$$option[0].'"';
       $option=$$option[1];
    } else {
       $value='value="'.$option.'"';
    }
    if ( $selected eq $option ) {
       $optionlist.="<option $value selected=\"on\">$option</option>\n";
       $found=1;
    } else {
       $optionlist.="<option $value>$option</option>\n";
    }
       }
       $optionlist.="<option value=\"TYPEDINVALUE\">Type in value</option>\n";
       if (($found) || (!$selected)) {
    $result.=$description.'&nbsp;<select name="'.&html_element_name($name)
               .'">
          '.$optionlist.'
         </select>';
       } else {
    $result.=&text_arg($description,$name,$token,$size);
       }
       return $result;
   }
   
   #----------------------------------------------------- image coordinates
   # single image coordinates, x, y 
   sub entercoords {
       my ($idx,,$idy,$mode,$width,$height) = @_;
       unless ($Apache::edit::bgimgsrc) { return ''; }
       if ($idx) { $idx.='_'; }
       if ($idy) { $idy.='_'; }
       my $bgfile=&Apache::lonnet::escape($Apache::edit::bgimgsrc);
       my $form    = 'lonhomework';
       my $element;
       if (! defined($mode) || $mode eq 'attribute') {
           $element = &Apache::lonnet::escape("$Apache::lonxml::curdepth");
       } elsif ($mode eq 'textnode') {  # for data between <tag> ... </tag>
           $element = &Apache::lonnet::escape('homework_edit_'.
                                              $Apache::lonxml::curdepth);
       }
       my $formheight='';
       if ($height) {
    $formheight='&formheight='.$height.'_'.$Apache::edit::bgimgsrccurdepth;
       }
       my $formwidth='';
       if ($width) {
    $formwidth='&formwidth='.$width.'_'.$Apache::edit::bgimgsrccurdepth;
       }
       my $result = <<"ENDBUTTON";
   <a href="/cgi-bin/imagechoice.pl?formname=$form&file=$bgfile&formx=$idx$element&formy=$idy$element$formheight$formwidth"
   target="imagechoice">Click Coordinates</a>
   ENDBUTTON
       return $result;
   }
   
   # coordinate pair (x1,y1)-(x2,y2)
   sub entercoordpair {
       my ($id,$mode,$width,$height) = @_;
       unless ($Apache::edit::bgimgsrc) { return ''; }
       my $bgfile=&Apache::lonnet::escape($Apache::edit::bgimgsrc);
       my $form    = 'lonhomework';
       my $element;
       if (! defined($mode) || $mode eq 'attribute') {
           $element = &Apache::lonnet::escape("$id\_$Apache::lonxml::curdepth");
       } elsif ($mode eq 'textnode') {  # for data between <tag> ... </tag>
           $element = &Apache::lonnet::escape('homework_edit_'.
                                              $Apache::lonxml::curdepth);
       }
       my $formheight='';
       if ($height) {
    $formheight='&formheight='.$height.'_'.$Apache::edit::bgimgsrccurdepth;
       }
       my $formwidth='';
       if ($width) {
    $formwidth='&formwidth='.$width.'_'.$Apache::edit::bgimgsrccurdepth;
       }
       my $result = <<"ENDBUTTON";
   <a href="/cgi-bin/imagechoice.pl?mode=pair&formname=$form&file=$bgfile$formheight$formwidth"
   target="imagechoice">Click Coordinate Pair</a>
   ENDBUTTON
       return $result;
   }
   #----------------------------------------------------- browse
   sub browse {
       # insert a link to call up the filesystem browser (lonindexer)
       my ($id, $mode) = @_;
       my $form    = 'lonhomework';
       my $element;
       if (! defined($mode) || $mode eq 'attribute') {
           $element = &Apache::lonnet::escape("$id\_$Apache::lonxml::curdepth");
       } elsif ($mode eq 'textnode') {  # for data between <tag> ... </tag>
           $element = &Apache::lonnet::escape('homework_edit_'.
                                              $Apache::lonxml::curdepth);
       }
       my $result = <<"ENDBUTTON";
   <a href=\"javascript:openbrowser('$form','$element')\"\>Browse</a>
   ENDBUTTON
       return $result;
   }
   
   #----------------------------------------------------- browse
   sub search {
       # insert a link to call up the filesystem browser (lonindexer)
       my ($id, $mode) = @_;
       my $form    = 'lonhomework';
       my $element;
       if (! defined($mode) || $mode eq 'attribute') {
           $element = &Apache::lonnet::escape("$id\_$Apache::lonxml::curdepth");
       } elsif ($mode eq 'textnode') {  # for data between <tag> ... </tag>
           $element = &Apache::lonnet::escape('homework_edit_'.
                                              $Apache::lonxml::curdepth);
       }
       my $result = <<"ENDBUTTON";
   <a href=\"javascript:opensearcher('$form','$element')\"\>Search</a>
   ENDBUTTON
       return $result;
   }
   
   
 1;  1;
 __END__  __END__
   
   =head1 NAME
   
   Apache::edit - edit mode helpers
   
   =head1 SYNOPSIS
   
   Invoked by many homework and xml related modules.
   
    &Apache::edit::SUBROUTINENAME(ARGUMENTS);
   
   =head1 INTRODUCTION
   
   This module outputs HTML syntax helpful for the rendering of edit
   mode interfaces.
   
   This is part of the LearningOnline Network with CAPA project
   described at http://www.lon-capa.org.
   
   =head1 HANDLER SUBROUTINE
   
   There is no handler subroutine.
   
   =head1 OTHER SUBROUTINES
   
   =over 4
   
   =item *
   
   initialize_edit() : initialize edit (set colordepth to zero)
   
   =item *
   
   tag_start($target,$token,$description) : provide deletion and insertion lists
   for the manipulation of a start tag; return a scalar string
   
   =item *
   
   tag_end($target,$token,$description) : ending syntax corresponding to
   &tag_start. return a scalar string.
   
   =item *
   
   start_table($token) : start table; update colordepth; return scalar string.
   
   =item *
   
   end_table() : reduce color depth; end table; return scalar string
   
   =item *
   
   start_spanning_row() : start a new table row spanning the 'edit' environment.
   
   =item *
   
   start_row() : start a new table row and element. 
   
   =item *
   
   end_row() : end current table element and row.
   
   =item *
   
   movebuttons($target,$token) : move-up and move-down buttons; return scalar
   string
   
   =item *
   
   deletelist($target,$token) : provide a yes option in an HTML select element;
   return scalar string
   
   =item *
   
   handle_delete($space,$target,$token,$tagstack,$parstack,$parser,$safeeval,
   $style) : respond to a user delete request by passing relevant stack
   and array information to various rendering functions; return a scalar string
   
   =item *
   
   get_insert_list($token) : provide an insertion list based on possibilities
   from lonxml; return a scalar string
   
   =item *
   
   insertlist($target,$token) : api that uses get_insert_list;
   return a scalar string
   
   =item *
   
   handleinsert($token) : provide an insertion list based on possibilities
   from lonxml; return a scalar string
   
   =item *
   
   get_insert_list($token) : provide an insertion list based on possibilities
   from lonxml; return a scalar string
   
   =item *
   browse($elementname) : provide a link which will open up the filesystem
   browser (lonindexer) and, once a file is selected, place the result in
   the form element $elementname.
   
   =item *
   search($elementname) : provide a link which will open up the filesystem
   searcher (lonsearchcat) and, once a file is selected, place the result in
   the form element $elementname.
   
   =item *
   editline(tag,data,description,size): Provide a <input type="text" ../> for
   single-line text entry.  This is to be used for text enclosed by tags, not
   arguements/parameters associated with a tag.
   
   =back
   
   incomplete...
   
   =cut
Removed from v.1.12  
changed lines
  Added in v.1.49

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