designoir

<?php

/**
 * class Preprocess
 * Copyright (C) 2006  Dao Gottwald
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Contact information:
 *   Dao Gottwald  <dao at design-noir.de>
 *   Herltestraße 12
 *   D-01307, Germany
 *
 * @version  1.0.1
 */

require_once 'NestedToken.php';

abstract class Preprocess {
    protected
        $text,
        $token;
    
    abstract public function run ($text);
    
    protected function _escape_init ($t = null) {
        return $this->token = $t ? $t : new NestedToken ('<', '/>');
    }
    protected function _escape_init_plain() {
        return $this->token = new NestedToken;
    }
    protected function _escape_init_plenk() {
        return $this->token = new NestedToken (' ', ' ');
    }
    protected function _escape_init_plenkXml() {
        return $this->token = new NestedToken (' <', '/> ');
    }
    protected function _escape_fin() {
        $this->token->decode ($this->text);
    }
    protected function _escape (array $match) {
        $match = isset ($match[1]) ? $match[1] : $match[0];
        $this->token->encode_string ($match, $match);
        return $match;
    }
    protected function _escape_comments_cdata() {
        $this->text = preg_replace_callback ('~<!--.*?-->~s', array ($this,'_escape'), $this->text);
        $this->text = preg_replace_callback ('~<!\[CDATA\[.*?\]\]>~s', array ($this,'_escape'), $this->text);
    }
    protected function _escape_tags() {
        $tags = func_get_args();
        $this->text = preg_replace_callback ('~</?(?:'. implode ('|', $tags) .')(?: .*?|/)?>~is', array ($this, '_escape'), $this->text);
    }
    protected function _escape_inline_tags() {
        $this->_escape_tags ('a','abbr','acronym','area','b','bdo','big','button','cite','code','del','dfn','em','font','i','img','input','ins','kbd','label','q','s','samp','small','span','strike','strong','sub','sup','tt','u','var','xmp');
    }
    protected function _escape_content() {
        $tags = func_get_args();
        $this->text = preg_replace_callback ('~(<('. implode ('|', $tags) .')(?: .*?)?>.*?</\2>)~is', array ($this, '_escape'), $this->text);
    }
}

?>