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<?php
/*
Plugin Name: WP-Syntax
Plugin URI: http://wordpress.org/extend/plugins/wp-syntax/
Description: Syntax highlighting using <a href="http://qbnz.com/highlighter/">GeSHi</a> supporting a wide range of popular languages. Wrap code blocks with <code><pre lang="LANGUAGE" line="1"></code> and <code></pre></code> where <code>LANGUAGE</code> is a geshi supported language syntax. The <code>line</code> attribute is optional.
Author: Ryan McGeary, Steven A. Zahm
Version: 0.9.9
Author URI: http://connections-pro.com
*/
#
# Copyright (c) 2007-2009 Ryan McGeary 2010 Steven A. Zahm
#
# This file is part of WP-Syntax.
#
# WP-Syntax 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.
#
# WP-Syntax 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 WP-Syntax; if not, write to the Free Software Foundation, Inc., 59
# Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
// Override allowed attributes for pre tags in order to use <pre lang=""> in
// comments. For more info see wp-includes/kses.php
if (!CUSTOM_TAGS) {
$allowedposttags['pre'] = array(
'lang' => array(),
'line' => array(),
'escaped' => array(),
'style' => array(),
'width' => array(),
);
//Allow plugin use in comments
$allowedtags['pre'] = array(
'lang' => array(),
'line' => array(),
'escaped' => array(),
);
}
include_once("geshi/geshi.php");
if (!defined("WP_CONTENT_URL")) define("WP_CONTENT_URL", get_option("siteurl") . "/wp-content");
if (!defined("WP_PLUGIN_URL")) define("WP_PLUGIN_URL", WP_CONTENT_URL . "/plugins");
function wp_syntax_head()
{
/*$css_url = WP_PLUGIN_URL . "/wp-syntax/wp-syntax.css";
if (file_exists(TEMPLATEPATH . "/wp-syntax.css"))
{
$css_url = get_bloginfo("template_url") . "/wp-syntax.css";
}
echo "\n".'<link rel="stylesheet" href="' . $css_url . '" type="text/css" media="screen" />'."\n";*/
$css_url = WP_PLUGIN_URL . "/wp-syntax/wp-syntax.css";
if (file_exists(STYLESHEETPATH . "/wp-syntax.css"))
{
$css_url = get_bloginfo("stylesheet_directory") . "/wp-syntax.css";
}
echo "\n".'<link rel="stylesheet" href="' . $css_url . '" type="text/css" media="screen" />'."\n";
}
function wp_syntax_code_trim($code)
{
// special ltrim b/c leading whitespace matters on 1st line of content
$code = preg_replace("/^\s*\n/siU", "", $code);
$code = rtrim($code);
return $code;
}
function wp_syntax_substitute(&$match)
{
global $wp_syntax_token, $wp_syntax_matches;
$i = count($wp_syntax_matches);
$wp_syntax_matches[$i] = $match;
return "\n\n<p>" . $wp_syntax_token . sprintf("%03d", $i) . "</p>\n\n";
}
function wp_syntax_line_numbers($code, $start)
{
$line_count = count(explode("\n", $code));
$output = "<pre>";
for ($i = 0; $i < $line_count; $i++)
{
$output .= ($start + $i) . "\n";
}
$output .= "</pre>";
return $output;
}
function wp_syntax_highlight($match)
{
global $wp_syntax_matches;
$i = intval($match[1]);
$match = $wp_syntax_matches[$i];
$language = strtolower(trim($match[1]));
$line = trim($match[2]);
$escaped = trim($match[3]);
$code = wp_syntax_code_trim($match[4]);
if ($escaped == "true") $code = htmlspecialchars_decode($code);
$geshi = new GeSHi($code, $language);
$geshi->enable_keyword_links(false);
do_action_ref_array('wp_syntax_init_geshi', array(&$geshi));
$output = "\n<div class=\"wp_syntax\">";
if ($line)
{
$output .= "<table><tr><td class=\"line_numbers\">";
$output .= wp_syntax_line_numbers($code, $line);
$output .= "</td><td class=\"code\">";
$output .= $geshi->parse_code();
$output .= "</td></tr></table>";
}
else
{
$output .= "<div class=\"code\">";
$output .= $geshi->parse_code();
$output .= "</div>";
}
return
$output .= "</div>\n";
return $output;
}
function wp_syntax_before_filter($content)
{
return preg_replace_callback(
"/\s*<pre(?:lang=[\"']([\w-]+)[\"']|line=[\"'](\d*)[\"']|escaped=[\"'](true|false)?[\"']|\s)+>(.*)<\/pre>\s*/siU",
"wp_syntax_substitute",
$content
);
}
function wp_syntax_after_filter($content)
{
global $wp_syntax_token;
$content = preg_replace_callback(
"/<p>\s*".$wp_syntax_token."(\d{3})\s*<\/p>/si",
"wp_syntax_highlight",
$content
);
return $content;
}
$wp_syntax_token = md5(uniqid(rand()));
// Add styling
add_action('wp_head', 'wp_syntax_head');
// We want to run before other filters; hence, a priority of 0 was chosen.
// The lower the number, the higher the priority. 10 is the default and
// several formatting filters run at or around 6.
add_filter('the_content', 'wp_syntax_before_filter', 0);
add_filter('the_excerpt', 'wp_syntax_before_filter', 0);
add_filter('comment_text', 'wp_syntax_before_filter', 0);
// We want to run after other filters; hence, a priority of 99.
add_filter('the_content', 'wp_syntax_after_filter', 99);
add_filter('the_excerpt', 'wp_syntax_after_filter', 99);
add_filter('comment_text', 'wp_syntax_after_filter', 99);
?>
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