system/helpers/typography_helper.php

<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 4.3.2 or newer
 *
 * @package		CodeIgniter
 * @author		ExpressionEngine Dev Team
 * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
 * @license		http://codeigniter.com/user_guide/license.html
 * @link		http://codeigniter.com
 * @since		Version 1.0
 * @filesource
 */

// ------------------------------------------------------------------------

/**
 * CodeIgniter Typography Helpers
 *
 * @package		CodeIgniter
 * @subpackage	Helpers
 * @category	Helpers
 * @author		ExpressionEngine Dev Team
 * @link		http://codeigniter.com/user_guide/helpers/typography_helper.html
 */

// ------------------------------------------------------------------------

/**
 * Convert newlines to HTML line breaks except within PRE tags
 *
 * @access	public
 * @param	string
 * @return	string
 */	
if ( ! function_exists('nl2br_except_pre'))
{
	function nl2br_except_pre($str)
	{
		$CI =& get_instance();
	
		$CI->load->library('typography');
		
		return $CI->typography->nl2br_except_pre($str);
	}
}
	
// ------------------------------------------------------------------------

/**
 * Auto Typography Wrapper Function
 *
 *
 * @access	public
 * @param	string
 * @param	bool	whether to allow javascript event handlers
 * @param	bool	whether to reduce multiple instances of double newlines to two
 * @return	string
 */
if ( ! function_exists('auto_typography'))
{
	function auto_typography($str, $strip_js_event_handlers = TRUE, $reduce_linebreaks = FALSE)
	{
		$CI =& get_instance();	
		$CI->load->library('typography');
		return $CI->typography->auto_typography($str, $strip_js_event_handlers, $reduce_linebreaks);
	}
}


// --------------------------------------------------------------------

/**
 * HTML Entities Decode
 *
 * This function is a replacement for html_entity_decode()
 *
 * In some versions of PHP the native function does not work
 * when UTF-8 is the specified character set, so this gives us
 * a work-around.  More info here:
 * http://bugs.php.net/bug.php?id=25670
 *
 * NOTE: html_entity_decode() has a bug in some PHP versions when UTF-8 is the
 * character set, and the PHP developers said they were not back porting the
 * fix to versions other than PHP 5.x.
 *
 * @access	public
 * @param	string
 * @return	string
 */
if ( ! function_exists('entity_decode'))
{
	function entity_decode($str, $charset='UTF-8')
	{
		if (stristr($str, '&') === FALSE) return $str;
	
		// The reason we are not using html_entity_decode() by itself is because
		// while it is not technically correct to leave out the semicolon
		// at the end of an entity most browsers will still interpret the entity
		// correctly.  html_entity_decode() does not convert entities without
		// semicolons, so we are left with our own little solution here. Bummer.
	
		if (function_exists('html_entity_decode') && (strtolower($charset) != 'utf-8' OR version_compare(phpversion(), '5.0.0', '>=')))
		{
			$str = html_entity_decode($str, ENT_COMPAT, $charset);
			$str = preg_replace('~&#x(0*[0-9a-f]{2,5})~ei', 'chr(hexdec("\\1"))', $str);
			return preg_replace('~&#([0-9]{2,4})~e', 'chr(\\1)', $str);
		}
	
		// Numeric Entities
		$str = preg_replace('~&#x(0*[0-9a-f]{2,5});{0,1}~ei', 'chr(hexdec("\\1"))', $str);
		$str = preg_replace('~&#([0-9]{2,4});{0,1}~e', 'chr(\\1)', $str);
	
		// Literal Entities - Slightly slow so we do another check
		if (stristr($str, '&') === FALSE)
		{
			$str = strtr($str, array_flip(get_html_translation_table(HTML_ENTITIES)));
		}
	
		return $str;
	}
}

/* End of file typography_helper.php */
/* Location: ./system/helpers/typography_helper.php */