# ---------------------------------------------------------------------------
# Escape Html Between EscPre (Text-formatting Plugin)
# A Plugin for Movable Type
#
# Release 0.01
# 
# Author: ISHIHARA Yoshinori
# http://www.ishihara.ne.jp/blog/escape_html_between_escpre.html
# ---------------------------------------------------------------------------
#
# Copyright (c) 2006 ISHIHARA Yoshinori
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in 
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
# ---------------------------------------------------------------------------

package MT::Plugin::EscapeHtmlBetweenEscPre;

use strict;
use MT;
use MT::Util qw(html_text_transform);

MT->add_text_filter('escape_html_between_escpre' => {
  label => 'Escape Html Between EscPre',
  docs => 'http://www.ishihara.ne.jp/blog/escape_html_between_escpre.html',
  on_format => \&escape_html_between_escpre
});

sub escape_html_between_escpre {
  my $text  = shift;
  my $ctx   = shift;
  $text =~ s/<escpre>(.*?)<\/escpre>/escape_html($1)/iseg;
  $text =~ s/(^|<\/pre>)(.*?)(<pre>|$)/default_text_format($1, $2, $3)/iseg;
  $text;
}

sub escape_html {
  my $text = shift;
  $text =~ s/&(?!(amp|lt|gt|quot);)/&amp;/g;
  $text =~ s/</&lt;/g;
  $text =~ s/>/&gt;/g;
  $text =~ s/\"/&quot;/g;
  return "<pre>".$text."</pre>";
}

sub default_text_format {
  my ($pre, $text, $post)  = @_;
  return $pre.html_text_transform($text).$post;
}
	
1;