# The LearningOnline Network with CAPA 
# edit mode helpers
# 3/20 Guy
package Apache::edit; 

use strict;
use Apache::lonnet;

sub tag_start {
  my ($target,$token) = @_;
  my $result='';
  if ($target eq "edit") {
    my $tag=$token->[1];
    $result.="<table width=\"100%\" border=\"2\"><tr><td>&lt;$tag&gt;</td>
<td>Delete:
<select name=\"delete_$Apache::lonxml::curdepth\">
<option>Nothing</option>
<option>Tag</option>
<option>Subtags</option>
</select></td>
<td>".
  &insertlist($token,$target).
    "</td>
</tr><tr><td colspan=\"3\">\n";
  }
  return $result;
}

sub tag_end {
  my ($target,$token) = @_;
  my $result='';
  if ($target eq 'edit') {
    my $tag=$token->[1];
    $result.="</td></tr><tr><td>&lt;/$tag&gt;</td></tr></table>\n";
  }
  return $result;
}

sub get_insert_list {
  my ($token) = @_;
  my $result='';
  if ($Apache::lonxml::insertlist{"$token->[1].which"}) {
    my @tags= @{ $Apache::lonxml::insertlist{"$token->[1].which"} };
    foreach my $tag (@tags) {
      $result.='<option value="'.$tag.'">'.$Apache::lonxml::insertlist{"$tag.description"}."</option>\n";
    }
    if ($result) { $result='<option selected="on"></option>'.$result; }
  }
  return $result;
}

sub insertlist {
  my ($token,$target) = @_;
  my $result;
  if ($target eq 'edit') {
    my $optionlist= &get_insert_list($token);
    if ($optionlist) {
      $result = "Insert:
<select name=\"insert_$Apache::lonxml::curdepth\">
$optionlist
</select>"
    }
  }
  return $result;
}

sub handle_insert {
  if (!$ENV{"form.insert_$Apache::lonxml::curdepth"}) { return ''; }
  my $result;
  my $newtag = $ENV{"form.insert_$Apache::lonxml::curdepth"};
  my $func=$Apache::lonxml::insertlist{"$newtag.function"};
  if ($func eq 'default') {
    $result.="\n<$newtag>\n</$newtag>";
  } else {
    {
      no strict 'refs';
      $result.=&$func;
    }
  }
  return $result;
}

sub editfield {
  my ($tag,$data,$description,$minwidth,$minheight)=@_;
  
  my $count=0;
  my $maxlength=-1;
  map { $count++;
	if (length($_) > $maxlength) { $maxlength = length ($_); }
      } split ("\n", $data);
  if ($maxlength > 80) { $maxlength = 80; }
  if ($maxlength < $minwidth) { $maxlength = $minwidth; }
  if ( $count < $minheight) { $count = $minheight; }
  if ($description) {
    $description="<br />".$description;
  }
  return "$description<br />\n&nbsp;&nbsp;&nbsp;<textarea rows=\"$count\" cols=\"$maxlength\" name=homework_edit_".$Apache::lonxml::curdepth.">$data</textarea>\n";
#  return "<br />\n&lt;$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";
}

sub modifiedfield {
  my ($token) = @_;
  my $result;
#  foreach my $envkey (sort keys %ENV) {
#    &Apache::lonxml::debug("$envkey ---- $ENV{$envkey}");
#  }
#  &Apache::lonxml::debug("I want homework_edit_$Apache::lonxml::curdepth");
#  &Apache::lonxml::debug($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;
}

sub insert_startouttext {
  return "\n<startouttext />\n<endouttext />";
}

1;
__END__