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Diff for /loncom/homework/edit.pm between versions 1.7 and 1.85

version 1.7, 2001/05/15 20:48:43 version 1.85, 2004/07/27 23:35:33
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 # The LearningOnline Network with CAPA   # The LearningOnline Network with CAPA 
 # edit mode helpers  # edit mode helpers
 # 3/20 Guy  #
   # $Id$
   #
   # 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/
   #
   
 package Apache::edit;   package Apache::edit; 
   
 use strict;  use strict;
 use Apache::lonnet;  use Apache::lonnet();
   use HTML::Entities();
   use Apache::lonlocal;
   
   # Global Vars
   # default list of colors to use in editing
   @Apache::edit::colorlist=('#ffffff','#ff0000','#00ff00','#0000ff','#0ff000','#000ff0','#f0000f');
   # depth of nesting of edit
   $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 {
       $Apache::edit::colordepth=0;
       @Apache::edit::inserttag=();
   }
   
 sub tag_start {  sub tag_start {
   my ($target,$token) = @_;      my ($target,$token,$description) = @_;
   my $result='';      my $result='';
   if ($target eq "edit") {      if ($target eq "edit") {
     my $tag=$token->[1];   my $tag=$token->[1];
 #    my $color = sprintf("#%06lx",(hex("ffffff")) >> scalar(split(/_/,$Apache::lonxml::curdepth)));   if (!$description) {
     my $color = sprintf("#%02lxffff",33* scalar(split(/_/,$Apache::lonxml::curdepth)));      $description=&Apache::lonxml::description($token);
     $result.="<table bgcolor=\"$color\" width=\"100%\" border=\"2\"><tr><td>&lt;$tag&gt;</td>      if (!$description) { $description="&lt;$tag&gt;"; }
 <td>Delete:   }
 <select name=\"delete_$Apache::lonxml::curdepth\">   $result.= &start_table($token)."<tr><td>$description</td>
 <option>Nothing</option>                        <td>Delete".
 <option>Tag</option>        &deletelist($target,$token)
 <option>Subtags</option>        ."</td>
 </select></td>                         <td>".
 <td>".         &insertlist($target,$token);
   &insertlist($token,$target).  #<td>". 
     "</td>  #  &movebuttons($target,$token).
 </tr><tr><td colspan=\"3\">\n";  #    "</tr><tr><td colspan=\"3\">\n";
   }   my @help = Apache::lonxml::helpinfo($token);
   return $result;   if ($help[0]) {
       $result .= '<td align="right" valign="top">' .
    Apache::loncommon::help_open_topic(@help) .
    '</td>';
    } else { $result .= "<td>&nbsp;</td>"; }
    $result .= &end_row().&start_spanning_row();
       }
       return $result;
 }  }
   
 sub tag_end {  sub tag_end {
   my ($target,$token) = @_;      my ($target,$token,$description) = @_;
   my $result='';      my $result='';
   if ($target eq 'edit') {      if ($target eq 'edit') {
     my $tag=$token->[1];   $result.="</td></tr>".&end_table()."\n";
     $result.="</td></tr><tr><td>&lt;/$tag&gt;</td></tr></table>\n";      }
   }      return $result;
   return $result;  }
   
   sub start_table {
       my ($token)=@_;
       my $tag = $token->[1];
       my $tagnum;
       foreach my $namespace (reverse @Apache::lonxml::namespace) {
    my $testtag=$namespace.'::'.$tag;
    $tagnum=$Apache::lonxml::insertlist{"$testtag.num"};
    if (defined($tagnum)) { last; }
       }
       if (!defined ($tagnum)) {$tagnum=$Apache::lonxml::insertlist{"$tag.num"};}
       my $color = $Apache::lonxml::insertlist{"$tagnum.color"};
       if (!defined($color)) {
    $color = $Apache::edit::colorlist[$Apache::edit::colordepth];
       }
       $Apache::edit::colordepth++;
       push(@Apache::edit::inserttag,$token->[1]);
       my $result='<div align="right">';
       $result.='<table bgcolor="'.$color.'" width="97%" border="0" cellspacing="5" cellpadding="3">';
       return $result;
   }
   
   sub end_table {
       $Apache::edit::colordepth--;
       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="4" 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;
   }
   
   sub deletelist {
       my ($target,$token) = @_;
       my $result = "<select name=\"delete_$Apache::lonxml::curdepth\">
   <option></option>
   <option>Yes</option>
   </select>";
       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"}) {
     &Apache::lonxml::debug("Adding1 $token->[1].which");   push (@tagnums, @{ $Apache::lonxml::insertlist{"$tagname.which"} });
     push (@tagnums, @{ $Apache::lonxml::insertlist{"$token->[1].which"} });      }
   }      foreach my $namespace (@Apache::lonxml::namespace) {
   foreach my $namespace (@Apache::lonxml::namespace) {   if ($Apache::lonxml::insertlist{"$namespace".'::'."$tagname.which"}) {
     if ($Apache::lonxml::insertlist{"$namespace".'::'."$token->[1].which"}) {      push (@tagnums, @{ $Apache::lonxml::insertlist{"$namespace".'::'."$tagname.which"} });
       &Apache::lonxml::debug("Adding2 $namespace".'::'."$token->[1].which");   }
       push (@tagnums, @{ $Apache::lonxml::insertlist{"$namespace".'::'."$token->[1].which"} });      }
     }      if (@tagnums) {
   }   my %options;
   if (@tagnums) {   foreach my $tagnum (@tagnums) {
     foreach my $tagnum (@tagnums) {      my $descrip=$Apache::lonxml::insertlist{"$tagnum.description"};
       $result.='<option value="'.$tagnum.'">'.$Apache::lonxml::insertlist{"$tagnum.description"}."</option>\n";      $options{$descrip} ="<option value=\"$tagnum\">".
     }   $descrip."</option>\n";
     if ($result) { $result='<option selected="on"></option>'.$result; }   }
   }   foreach my $option (sort(keys(%options))) {$result.=$options{$option};}
   return $result;   if ($result) { $result='<option selected="on"></option>'.$result; }
       }
       return $result;
 }  }
   
 sub insertlist {  sub insertlist {
   my ($token,$target) = @_;      my ($target,$token) = @_;
   my $result;      return &innerinsertlist($target,$token->[1]);
   if ($target eq 'edit') {  }
     my $optionlist= &get_insert_list($token);  
     if ($optionlist) {  sub innerinsertlist {
       $result = "Insert:      my ($target,$tagname,$closingtag) = @_;
 <select name=\"insert_$Apache::lonxml::curdepth\">      my $result;
 $optionlist      my $after='';
 </select>"      if ($closingtag) {
    $after='_after_'.$closingtag; 
       }
       if ($target eq 'edit') {
    my $optionlist= &get_insert_list($tagname);
    if ($optionlist) {
       $result = "Insert:
               <select name=\"insert$after\_$Apache::lonxml::curdepth\">
                     $optionlist
               </select>"
    } else {
       $result="&nbsp;";
    }
     }      }
   }      return $result;
   return $result;  
 }  }
   
 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{"$tagnum.function"};
   if ($func eq 'default') {      if ($func eq 'default') {
     my $newtag=$Apache::lonxml::insertlist{"$tagnum.tag"};   my $newtag=$Apache::lonxml::insertlist{"$tagnum.tag"};
     my $namespace;   my $namespace;
     if ($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;
   }
   
   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;
   return $result;  }
   
   sub insert_img {
       return '
       <img />';
   }
   
   sub insert_responseparam {
       return '
       <responseparam />';
   }
   
   sub insert_formularesponse {
       return '
   <formularesponse answer="" samples="">
       <textline />
       <hintgroup>
       <startouttext /><endouttext />
       </hintgroup>
   </formularesponse>';
   }
   
   sub insert_numericalresponse {
       return '
   <numericalresponse answer="">
       <textline />
       <hintgroup>
       <startouttext /><endouttext />
       </hintgroup>
   </numericalresponse>';
   }
   
   sub insert_stringresponse {
       return '
   <stringresponse answer="" type="">
       <textline />
       <hintgroup>
       <startouttext /><endouttext />
       </hintgroup>
   </stringresponse>';
   }
   
   sub insert_essayresponse {
       return '
   <essayresponse>
       <textfield></textfield>
   </essayresponse>';
   }
   
   sub insert_imageresponse {
       return '
   <imageresponse max="1">
       <foilgroup>
       </foilgroup>
       <hintgroup>
       <startouttext /><endouttext />
       </hintgroup>
   </imageresponse>';
 }  }
   
 sub insert_optionresponse {  sub insert_optionresponse {
   return '      return '
 <optionresponse max="10">  <optionresponse max="10">
     <foilgroup options="">      <foilgroup options="">
     </foilgroup>      </foilgroup>
       <hintgroup>
       <startouttext /><endouttext />
       </hintgroup>
 </optionresponse>';  </optionresponse>';
 }  }
   
   sub insert_organicresponse {
       return '
   <organicresponse>
       <textline />
       <hintgroup>
       <startouttext /><endouttext />
       </hintgroup>
   </organicresponse>';
   }
   
   sub insert_organicstructure {
       return '
   <organicstructure />
   ';
   }
   
   sub insert_radiobuttonresponse {
       return '
   <radiobuttonresponse max="10">
       <foilgroup>
       </foilgroup>
       <hintgroup>
       <startouttext /><endouttext />
       </hintgroup>
   </radiobuttonresponse>';
   }
   
   sub insert_reactionresponse {
       return '
   <reactionresponse>
       <textline />
       <hintgroup>
       <startouttext /><endouttext />
       </hintgroup>
   </reactionresponse>';
   }
   
   sub insert_rankresponse {
       return '
   <rankresponse max="10">
       <foilgroup options="">
       </foilgroup>
       <hintgroup>
       <startouttext /><endouttext />
       </hintgroup>
   </rankresponse>';
   }
   
   sub insert_matchresponse {
       return '
   <matchresponse max="10">
       <foilgroup options="">
         <itemgroup>
         </itemgroup>
       </foilgroup>
       <hintgroup>
       <startouttext /><endouttext />
       </hintgroup>
   </matchresponse>';
   }
   
   sub insert_displayduedate { return '<displayduedate />'; }
   sub insert_displaytitle   { return '<displaytitle />'; }
   sub insert_hintpart {
       return '
   <hintpart on="default">
       <startouttext/>
       <endouttext />
   </hintpart>';
   }
   
   sub insert_hintgroup {
     return '
   <hintgroup>
       <startouttext /><endouttext />
   </hintgroup>';
   }
   
   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_optionhint {
       return '
   <optionhint>
   </optionhint>';
   }
   
   sub insert_startouttext {
       return "<startouttext /><endouttext />";
   }
   
   sub insert_script {
       return "\n<script type=\"loncapa/perl\"></script>";
   }
   
   sub textarea_sizes {
       my ($data)=@_;
       my $count=0;
       my $maxlength=-1;
       foreach (split ("\n", $$data)) {
    $count+=int(length($_)/79);
    $count++;
    if (length($_) > $maxlength) { $maxlength = length($_); }
       }
       my $rows = $count;
       my $cols = $maxlength;
       return ($rows,$cols);
   }
   
   sub editline {
       my ($tag,$data,$description,$size)=@_;
       $data=&HTML::Entities::encode($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 {  sub editfield {
   my ($tag,$data,$description,$minwidth,$minheight)=@_;      my ($tag,$data,$description,$minwidth,$minheight,$usehtmlarea)=@_;
     
   my $count=0;      my ($rows,$cols)=&textarea_sizes(\$data);
   my $maxlength=-1;      if (&Apache::lonhtmlcommon::htmlareabrowser() &&
   map { $count++;   !&Apache::lonhtmlcommon::htmlareablocked()) {
  if (length($_) > $maxlength) { $maxlength = length ($_); }   $rows+=7;      # make room for HTMLarea
       } split ("\n", $data);   $minheight+=7; # make room for HTMLarea
   if ($maxlength > 80) { $maxlength = 80; }      }
   if ($maxlength < $minwidth) { $maxlength = $minwidth; }      if ($cols > 80) { $cols = 80; }
   if ( $count < $minheight) { $count = $minheight; }      if ($cols < $minwidth ) { $cols = $minwidth; }
   if ($description) {      if ($rows < $minheight) { $rows = $minheight; }
     $description="<br />".$description;      if ($description) { $description="<br />".$description."<br />"; }
   }      if ($usehtmlarea) {
   return "$description<br />\n&nbsp;&nbsp;&nbsp;<textarea rows=\"$count\" cols=\"$maxlength\" name=homework_edit_".$Apache::lonxml::curdepth.">$data</textarea>\n";   push @Apache::lonxml::htmlareafields,'homework_edit_'.
 #  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";      $Apache::lonxml::curdepth;
       }
       return $description."\n".'&nbsp;&nbsp;&nbsp;<textarea rows="'.$rows.
    '" cols="'.$cols.'" name="homework_edit_'.
    $Apache::lonxml::curdepth.'" id="homework_edit_'.
    $Apache::lonxml::curdepth.'">'.
    &HTML::Entities::encode($data,'<>&"').'</textarea>'.
    ($usehtmlarea?&Apache::lonhtmlcommon::spelllink('lonhomework',
    'homework_edit_'.$Apache::lonxml::curdepth):'')."\n";
 }  }
   
 sub modifiedfield {  sub modifiedfield {
   my ($token) = @_;      my ($endtag,$parser) = @_;
   my $result;      my $result;
 #  foreach my $envkey (sort keys %ENV) {  #  foreach my $envkey (sort keys %ENV) {
 #    &Apache::lonxml::debug("$envkey ---- $ENV{$envkey}");  #    &Apache::lonxml::debug("$envkey ---- $ENV{$envkey}");
 #  }  #  }
 #  &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) {      my $bodytext=&Apache::lonxml::get_all_text($endtag,$parser);
     if (defined $token->[4]) {      # textareas throw away intial \n 
       $result=$token->[4].$result;      if ($bodytext=~/^\n/) { $result="\n".$result; }
     } else {      return $result;
       $result=$result.$token->[2];  }
   
   # Returns a 1 if the token has been modified and you should rebuild the tag
   # side-effects, will modify the $token if new values are found
   sub get_new_args {
       my ($token,$parstack,$safeeval,@args)=@_;
       my $rebuild=0;
       foreach my $arg (@args) {
    #just want the string that it was set to
    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:");
    if (defined($newvalue) && $value ne $newvalue) {
       if (ref($newvalue) eq 'ARRAY') {
    $token->[2]->{$arg}=join(',',@$newvalue);
       } else {
    $token->[2]->{$arg}=$newvalue;
       }
       $rebuild=1;
    } elsif (!defined($newvalue) && defined($value)) {
       delete($token->[2]->{$arg});
       $rebuild=1;
    }
     }      }
   }      return $rebuild;
   return $result;  
 }  }
   
 sub insert_startouttext {  # looks for /> on start tags
   return "\n<startouttext />\n<endouttext />";  sub rebuild_tag {
       my ($token) = @_;
       my $result;
       if ($token->[0] eq 'S') {
    $result = '<'.$token->[1];
    while (my ($key,$val)= each(%{$token->[2]})) {
       $val=~s:^\s+|\s+$::g;
       $val=~s:"::g; #"
       &Apache::lonxml::debug("setting :$key: to  :$val:");
       $result.=' '.$key.'="'.$val.'"';
    }
    if ($token->[4] =~ m:/>$:) {
       $result.=' />';
    } else {
       $result.='>';
    }
       } elsif ( $token->[0] eq 'E' ) {
    $result = '</'.$token->[1].'>';
       }
       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 checked_arg {
       my ($description,$name,$list,$token) = @_;
       my $result;
       my $optionlist="";
       my $allselected=$token->[2]{$name};
       $result=&mt($description);
       foreach my $option (@$list) {
    my ($value,$text);
    if ( ref($option) eq 'ARRAY') {
       $value='value="'.$$option[0].'"';
       $text=$$option[1];
       $option=$$option[0];
    } else {
       $text=$option;
       $value='value="'.$option.'"';
    }
    $result.="<nobr><input type='checkbox' $value name='".
       &html_element_name($name)."'";
    foreach my $selected (split(/,/,$allselected)) {
       if ( $selected eq $option ) {
    $result.=" checked='on' ";
    last;
       }
    }
    $result.=" />$text</nobr>\n";
       }
       return $result;
   }
   
   sub text_arg {
       my ($description,$name,$token,$size) = @_;
       my $result;
       if (!defined $size) { $size=20; }
       my $arg=$token->[2]{$name};
       $result=&mt($description).'&nbsp;<input name="'.&html_element_name($name).
    '" type="text" value="'.$arg.'" size="'.$size.'" />';
       return '<nobr>'.$result.'</nobr>';
   }
   
   sub select_arg {
       my ($description,$name,$list,$token) = @_;
       my $result;
       my $optionlist="";
       my $selected=$token->[2]{$name};
       foreach my $option (@$list) {
    my ($text,$value);
    if ( ref($option) eq 'ARRAY') {
       $value='value="'.$$option[0].'"';
       $text=$$option[1];
       $option=$$option[0];
    } else {
       $text=$option;
       $value='value="'.$option.'"';
    }
    if ( $selected eq $option ) {
       $optionlist.="<option $value selected=\"on\">$text</option>\n";
    } else {
       $optionlist.="<option $value >$text</option>\n";
    }
       }
       $result.='<nobr>'.$description.'&nbsp;<select name="'.
    &html_element_name($name).'">
          '.$optionlist.'
         </select></nobr>';
       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 ($text,$value);
    if ( ref($option) eq 'ARRAY') {
       $value='value="'.$$option[0].'"';
       $text=$$option[1];
       $option=$$option[0];
    } else {
       $text=$option;
       $value='value="'.$option.'"';
    }
    if ( $selected eq $option ) {
       $optionlist.="<option $value selected=\"on\">$text</option>\n";
       $found=1;
    } else {
       $optionlist.="<option $value>$text</option>\n";
    }
       }
       $optionlist.="<option value=\"TYPEDINVALUE\"".
     ((!$found)?' selected="on"':'').
     ">".&mt('Type-in value')."</option>\n";
   #
       my $element=&html_element_name($name);
       my $selectelement='select_list_'.$element;
       my $typeinelement='type_in_'.$element;
       my $typeinvalue=($found?'':$selected);
   #
       my $hiddenvalue='this.form.'.$element.'.value';
       my $selectedindex='this.form.'.$selectelement.'.selectedIndex';
       my $selectedvalue='this.form.'.$selectelement.
        '.options['.$selectedindex.'].value';
       my $typedinvalue='this.form.'.$typeinelement.'.value';
       my $selecttypeinindex='this.form.'.$selectelement.'.options.length';
       $description=&mt($description);
   #
       return (<<ENDSELECTORTYPE);
   <nobr>
   $description
   &nbsp;<select name="$selectelement"
   onChange="if ($selectedvalue!='TYPEDINVALUE') { $hiddenvalue=$selectedvalue; $typedinvalue=''; }" >
   $optionlist
   </select>
   <input type="text" size="$size" name="$typeinelement"
          value="$typeinvalue" 
   onChange="$hiddenvalue=$typedinvalue;"
   onFocus="$selectedindex=$selecttypeinindex-1;" />
   <input type="hidden" name="$element" value="$selected" />
   </nobr>
   ENDSELECTORTYPE
   }
   
   #----------------------------------------------------- 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 $bgfile=&Apache::lonnet::escape(&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$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 $id=$Apache::lonxml::curdepth;
       my %data=("imagechoice.$id.type"      =>'point',
         "imagechoice.$id.formname"  =>$form,
         "imagechoice.$id.formx"     =>"$idx$element",
         "imagechoice.$id.formy"     =>"$idy$element",
         "imagechoice.$id.file"      =>$bgfile,
         "imagechoice.$id.formcoord" =>$element);
       if ($height) {
    $data{"imagechoice.$id.formheight"}=$height.'_'.
       $Apache::edit::bgimgsrccurdepth;
       }
       if ($width) {
    $data{"imagechoice.$id.formwidth"}=$width.'_'.
       $Apache::edit::bgimgsrccurdepth;
       }
       &Apache::lonnet::appenv(%data);
       my $text="Click Coordinates";
       my $result='<a href="/adm/imagechoice?token='.$id.'" target="imagechoice">'.$text.'</a>';
       return $result;
   }
   
   # coordinates (x1,y1)-(x2,y2)...
   # mode can be either box, or polygon
   sub entercoord {
       my ($idx,$mode,$width,$height,$type) = @_;
       unless ($Apache::edit::bgimgsrc) { return ''; }
       my $bgfile=&Apache::lonnet::escape(&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$Apache::edit::bgimgsrc));
       my $form    = 'lonhomework';
       my $element;
       if (! defined($mode) || $mode eq 'attribute') {
           $element = &Apache::lonnet::escape("$idx\_$Apache::lonxml::curdepth");
       } elsif ($mode eq 'textnode') {  # for data between <tag> ... </tag>
           $element = &Apache::lonnet::escape('homework_edit_'.
                                              $Apache::lonxml::curdepth);
       }
       my $id=$Apache::lonxml::curdepth;
       my %data=("imagechoice.$id.type"      =>$type,
         "imagechoice.$id.formname"  =>$form,
         "imagechoice.$id.file"      =>$bgfile,
         "imagechoice.$id.formcoord" =>$element);
       if ($height) {
    $data{"imagechoice.$id.formheight"}=$height.'_'.
       $Apache::edit::bgimgsrccurdepth;
       }
       if ($width) {
    $data{"imagechoice.$id.formwidth"}=$width.'_'.
       $Apache::edit::bgimgsrccurdepth;
       }
       &Apache::lonnet::appenv(%data);
       my $text="Enter Coordinates";
       if ($type eq 'polygon') { $text='Create Polygon Data'; }
       my $result='<a href="/adm/imagechoice?token='.$id.'" target="imagechoice">'.$text.'</a>';
       return $result;
 }  }
   
   sub deletecoorddata {
       &Apache::lonnet::delenv("imagechoice\\.");
   }
   
   #----------------------------------------------------- browse
   sub browse {
       # insert a link to call up the filesystem browser (lonindexer)
       my ($id, $mode, $titleid) = @_;
       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 $titleelement;
       if ($titleid) {
    $titleelement=",'','','".&Apache::lonnet::escape("$titleid\_$Apache::lonxml::curdepth")."'";
       }
       my $result = <<"ENDBUTTON";
   <a href=\"javascript:openbrowser('$form','$element'$titleelement)\"\>Select</a>
   ENDBUTTON
       return $result;
   }
   
   #----------------------------------------------------- browse
   sub search {
       # insert a link to call up the filesystem browser (lonindexer)
       my ($id, $mode, $titleid) = @_;
       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 $titleelement;
       if ($titleid) {
    $titleelement=",'".&Apache::lonnet::escape("$titleid\_$Apache::lonxml::curdepth")."'";
       }
       my $result = <<"ENDBUTTON";
   <a href=\"javascript:opensearcher('$form','$element'$titleelement)\"\>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.1.7  
changed lines
  Added in v.1.85

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