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<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.1.6 or newer
 *
 * @package		CodeIgniter
 * @author		ExpressionEngine Dev Team
 * @copyright	Copyright (c) 2008 - 2011, EllisLab, Inc.
 * @license		http://codeigniter.com/user_guide/license.html
 * @link		http://codeigniter.com
 * @since		Version 1.0
 * @filesource
 */

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

/**
 * Typography Class
 *
 *
 * @access		private
 * @category	Helpers
 * @author		ExpressionEngine Dev Team
 * @link		http://codeigniter.com/user_guide/helpers/
 */
class CI_Typography {

	// Block level elements that should not be wrapped inside <p> tags
	var $block_elements = 'address|blockquote|div|dl|fieldset|form|h\d|hr|noscript|object|ol|p|pre|script|table|ul';

	// Elements that should not have <p> and <br /> tags within them.
	var $skip_elements	= 'p|pre|ol|ul|dl|object|table|h\d';

	// Tags we want the parser to completely ignore when splitting the string.
	var $inline_elements = 'a|abbr|acronym|b|bdo|big|br|button|cite|code|del|dfn|em|i|img|ins|input|label|map|kbd|q|samp|select|small|span|strong|sub|sup|textarea|tt|var';

	// array of block level elements that require inner content to be within another block level element
	var $inner_block_required = array('blockquote');

	// the last block element parsed
	var $last_block_element = '';

	// whether or not to protect quotes within { curly braces }
	var $protect_braced_quotes = FALSE;

	/**
	 * Auto Typography
	 *
	 * This function converts text, making it typographically correct:
	 *	- Converts double spaces into paragraphs.
	 *	- Converts single line breaks into <br /> tags
	 *	- Converts single and double quotes into correctly facing curly quote entities.
	 *	- Converts three dots into ellipsis.
	 *	- Converts double dashes into em-dashes.
	 *  - Converts two spaces into entities
	 *
	 * @access	public
	 * @param	string
	 * @param	bool	whether to reduce more then two consecutive newlines to two
	 * @return	string
	 */
	function auto_typography($str, $reduce_linebreaks = FALSE)
	{
		if ($str == '')
		{
			return '';
		}

		// Standardize Newlines to make matching easier
		if (strpos($str, "\r") !== FALSE)
		{
			$str = str_replace(array("\r\n", "\r"), "\n", $str);
		}

		// Reduce line breaks.  If there are more than two consecutive linebreaks
		// we'll compress them down to a maximum of two since there's no benefit to more.
		if ($reduce_linebreaks === TRUE)
		{
			$str = preg_replace("/\n\n+/", "\n\n", $str);
		}

		// HTML comment tags don't conform to patterns of normal tags, so pull them out separately, only if needed
		$html_comments = array();
		if (strpos($str, '<!--') !== FALSE)
		{
			if (preg_match_all("#(<!\-\-.*?\-\->)#s", $str, $matches))
			{
				for ($i = 0, $total = count($matches[0]); $i < $total; $i++)
				{
					$html_comments[] = $matches[0][$i];
					$str = str_replace($matches[0][$i], '{@HC'.$i.'}', $str);
				}
			}
		}

		// match and yank <pre> tags if they exist.  It's cheaper to do this separately since most content will
		// not contain <pre> tags, and it keeps the PCRE patterns below simpler and faster
		if (strpos($str, '<pre') !== FALSE)
		{
			$str = preg_replace_callback("#<pre.*?>.*?</pre>#si", array($this, '_protect_characters'), $str);
		}

		// Convert quotes within tags to temporary markers.
		$str = preg_replace_callback("#<.+?>#si", array($this, '_protect_characters'), $str);

		// Do the same with braces if necessary
		if ($this->protect_braced_quotes === TRUE)
		{
			$str = preg_replace_callback("#\{.+?\}#si", array($this, '_protect_characters'), $str);
		}

		// Convert "ignore" tags to temporary marker.  The parser splits out the string at every tag
		// it encounters.  Certain inline tags, like image tags, links, span tags, etc. will be
		// adversely affected if they are split out so we'll convert the opening bracket < temporarily to: {@TAG}
		$str = preg_replace("#<(/*)(".$this->inline_elements.")([ >])#i", "{@TAG}\\1\\2\\3", $str);

		// Split the string at every tag.  This expression creates an array with this prototype:
		//
		//	[array]
		//	{
		//		[0] = <opening tag>
		//		[1] = Content...
		//		[2] = <closing tag>
		//		Etc...
		//	}
		$chunks = preg_split('/(<(?:[^<>]+(?:"[^"]*"|\'[^\']*\')?)+>)/', $str, -1, PREG_SPLIT_DELIM_CAPTURE|PREG_SPLIT_NO_EMPTY);

		// Build our finalized string.  We cycle through the array, skipping tags, and processing the contained text
		$str = '';
		$process = TRUE;
		$paragraph = FALSE;
		$current_chunk = 0;
		$total_chunks = count($chunks);

		foreach ($chunks as $chunk)
		{
			$current_chunk++;

			// Are we dealing with a tag? If so, we'll skip the processing for this cycle.
			// Well also set the "process" flag which allows us to skip <pre> tags and a few other things.
			if (preg_match("#<(/*)(".$this->block_elements.").*?>#", $chunk, $match))
			{
				if (preg_match("#".$this->skip_elements."#", $match[2]))
				{
					$process =  ($match[1] == '/') ? TRUE : FALSE;
				}

				if ($match[1] == '')
				{
					$this->last_block_element = $match[2];
				}

				$str .= $chunk;
				continue;
			}

			if ($process == FALSE)
			{
				$str .= $chunk;
				continue;
			}

			//  Force a newline to make sure end tags get processed by _format_newlines()
			if ($current_chunk == $total_chunks)
			{
				$chunk .= "\n";
			}

			//  Convert Newlines into <p> and <br /> tags
			$str .= $this->_format_newlines($chunk);
		}

		// No opening block level tag?  Add it if needed.
		if ( ! preg_match("/^\s*<(?:".$this->block_elements.")/i", $str))
		{
			$str = preg_replace("/^(.*?)<(".$this->block_elements.")/i", '<p>$1</p><$2', $str);
		}

		// Convert quotes, elipsis, em-dashes, non-breaking spaces, and ampersands
		$str = $this->format_characters($str);

		// restore HTML comments
		for ($i = 0, $total = count($html_comments); $i < $total; $i++)
		{
			// remove surrounding paragraph tags, but only if there's an opening paragraph tag
			// otherwise HTML comments at the ends of paragraphs will have the closing tag removed
			// if '<p>{@HC1}' then replace <p>{@HC1}</p> with the comment, else replace only {@HC1} with the comment
			$str = preg_replace('#(?(?=<p>\{@HC'.$i.'\})<p>\{@HC'.$i.'\}(\s*</p>)|\{@HC'.$i.'\})#s', $html_comments[$i], $str);
		}

		// Final clean up
		$table = array(

						// If the user submitted their own paragraph tags within the text
						// we will retain them instead of using our tags.
						'/(<p[^>*?]>)<p>/'	=> '$1', // <?php BBEdit syntax coloring bug fix

						// Reduce multiple instances of opening/closing paragraph tags to a single one
						'#(</p>)+#'			=> '</p>',
						'/(<p>\W*<p>)+/'	=> '<p>',

						// Clean up stray paragraph tags that appear before block level elements
						'#<p></p><('.$this->block_elements.')#'	=> '<$1',

						// Clean up stray non-breaking spaces preceeding block elements
						'#(&nbsp;\s*)+<('.$this->block_elements.')#'	=> '  <$2',

						// Replace the temporary markers we added earlier
						'/\{@TAG\}/'		=> '<',
						'/\{@DQ\}/'			=> '"',
						'/\{@SQ\}/'			=> "'",
						'/\{@DD\}/'			=> '--',
						'/\{@NBS\}/'		=> '  ',

						// An unintended consequence of the _format_newlines function is that
						// some of the newlines get truncated, resulting in <p> tags
						// starting immediately after <block> tags on the same line.
						// This forces a newline after such occurrences, which looks much nicer.
						"/><p>\n/"			=> ">\n<p>",

						// Similarly, there might be cases where a closing </block> will follow
						// a closing </p> tag, so we'll correct it by adding a newline in between
						"#</p></#"			=> "</p>\n</"
						);

		// Do we need to reduce empty lines?
		if ($reduce_linebreaks === TRUE)
		{
			$table['#<p>\n*</p>#'] = '';
		}
		else
		{
			// If we have empty paragraph tags we add a non-breaking space
			// otherwise most browsers won't treat them as true paragraphs
			$table['#<p></p>#'] = '<p>&nbsp;</p>';
		}

		return preg_replace(array_keys($table), $table, $str);

	}

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

	/**
	 * Format Characters
	 *
	 * This function mainly converts double and single quotes
	 * to curly entities, but it also converts em-dashes,
	 * double spaces, and ampersands
	 *
	 * @access	public
	 * @param	string
	 * @return	string
	 */
	function format_characters($str)
	{
		static $table;

		if ( ! isset($table))
		{
			$table = array(
							// nested smart quotes, opening and closing
							// note that rules for grammar (English) allow only for two levels deep
							// and that single quotes are _supposed_ to always be on the outside
							// but we'll accommodate both
							// Note that in all cases, whitespace is the primary determining factor
							// on which direction to curl, with non-word characters like punctuation
							// being a secondary factor only after whitespace is addressed.
							'/\'"(\s|$)/'					=> '&#8217;&#8221;$1',
							'/(^|\s|<p>)\'"/'				=> '$1&#8216;&#8220;',
							'/\'"(\W)/'						=> '&#8217;&#8221;$1',
							'/(\W)\'"/'						=> '$1&#8216;&#8220;',
							'/"\'(\s|$)/'					=> '&#8221;&#8217;$1',
							'/(^|\s|<p>)"\'/'				=> '$1&#8220;&#8216;',
							'/"\'(\W)/'						=> '&#8221;&#8217;$1',
							'/(\W)"\'/'						=> '$1&#8220;&#8216;',

							// single quote smart quotes
							'/\'(\s|$)/'					=> '&#8217;$1',
							'/(^|\s|<p>)\'/'				=> '$1&#8216;',
							'/\'(\W)/'						=> '&#8217;$1',
							'/(\W)\'/'						=> '$1&#8216;',

							// double quote smart quotes
							'/"(\s|$)/'						=> '&#8221;$1',
							'/(^|\s|<p>)"/'					=> '$1&#8220;',
							'/"(\W)/'						=> '&#8221;$1',
							'/(\W)"/'						=> '$1&#8220;',

							// apostrophes
							"/(\w)'(\w)/"					=> '$1&#8217;$2',

							// Em dash and ellipses dots
							'/\s?\-\-\s?/'					=> '&#8212;',
							'/(\w)\.{3}/'					=> '$1&#8230;',

							// double space after sentences
							'/(\W)  /'						=> '$1&nbsp; ',

							// ampersands, if not a character entity
							'/&(?!#?[a-zA-Z0-9]{2,};)/'		=> '&amp;'
						);
		}

		return preg_replace(array_keys($table), $table, $str);
	}

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

	/**
	 * Format Newlines
	 *
	 * Converts newline characters into either <p> tags or <br />
	 *
	 * @access	public
	 * @param	string
	 * @return	string
	 */
	function _format_newlines($str)
	{
		if ($str == '')
		{
			return $str;
		}

		if (strpos($str, "\n") === FALSE  && ! in_array($this->last_block_element, $this->inner_block_required))
		{
			return $str;
		}

		// Convert two consecutive newlines to paragraphs
		$str = str_replace("\n\n", "</p>\n\n<p>", $str);

		// Convert single spaces to <br /> tags
		$str = preg_replace("/([^\n])(\n)([^\n])/", "\\1<br />\\2\\3", $str);

		// Wrap the whole enchilada in enclosing paragraphs
		if ($str != "\n")
		{
			// We trim off the right-side new line so that the closing </p> tag
			// will be positioned immediately following the string, matching
			// the behavior of the opening <p> tag
			$str =  '<p>'.rtrim($str).'</p>';
		}

		// Remove empty paragraphs if they are on the first line, as this
		// is a potential unintended consequence of the previous code
		$str = preg_replace("/<p><\/p>(.*)/", "\\1", $str, 1);

		return $str;
	}

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

	/**
	 * Protect Characters
	 *
	 * Protects special characters from being formatted later
	 * We don't want quotes converted within tags so we'll temporarily convert them to {@DQ} and {@SQ}
	 * and we don't want double dashes converted to emdash entities, so they are marked with {@DD}
	 * likewise double spaces are converted to {@NBS} to prevent entity conversion
	 *
	 * @access	public
	 * @param	array
	 * @return	string
	 */
	function _protect_characters($match)
	{
		return str_replace(array("'",'"','--','  '), array('{@SQ}', '{@DQ}', '{@DD}', '{@NBS}'), $match[0]);
	}

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

	/**
	 * Convert newlines to HTML line breaks except within PRE tags
	 *
	 * @access	public
	 * @param	string
	 * @return	string
	 */
	function nl2br_except_pre($str)
	{
		$ex = explode("pre>",$str);
		$ct = count($ex);

		$newstr = "";
		for ($i = 0; $i < $ct; $i++)
		{
			if (($i % 2) == 0)
			{
				$newstr .= nl2br($ex[$i]);
			}
			else
			{
				$newstr .= $ex[$i];
			}

			if ($ct - 1 != $i)
				$newstr .= "pre>";
		}

		return $newstr;
	}

}
// END Typography Class

/* End of file Typography.php */
/* Location: ./system/libraries/Typography.php */

20.1.1 by galaxyAbstractor * Added an simple admin panel to the codeviewer-cmssy stuff	1	<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
	2	/**
	3	* CodeIgniter
	4	*
	5	* An open source application development framework for PHP 5.1.6 or newer
	6	*
	7	* @package CodeIgniter
	8	* @author ExpressionEngine Dev Team
	9	* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
	10	* @license http://codeigniter.com/user_guide/license.html
	11	* @link http://codeigniter.com
	12	* @since Version 1.0
	13	* @filesource
	14	*/
	15
	16	// ------------------------------------------------------------------------
	17
	18	/**
	19	* Typography Class
	20	*
	21	*
	22	* @access private
	23	* @category Helpers
	24	* @author ExpressionEngine Dev Team
	25	* @link http://codeigniter.com/user_guide/helpers/
	26	*/
	27	class CI_Typography {
	28
	29	// Block level elements that should not be wrapped inside <p> tags
	30	var $block_elements = 'address\|blockquote\|div\|dl\|fieldset\|form\|h\d\|hr\|noscript\|object\|ol\|p\|pre\|script\|table\|ul';
	31
	32	// Elements that should not have <p> and <br /> tags within them.
	33	var $skip_elements = 'p\|pre\|ol\|ul\|dl\|object\|table\|h\d';
	34
	35	// Tags we want the parser to completely ignore when splitting the string.
	36	var $inline_elements = 'a\|abbr\|acronym\|b\|bdo\|big\|br\|button\|cite\|code\|del\|dfn\|em\|i\|img\|ins\|input\|label\|map\|kbd\|q\|samp\|select\|small\|span\|strong\|sub\|sup\|textarea\|tt\|var';
	37
	38	// array of block level elements that require inner content to be within another block level element
	39	var $inner_block_required = array('blockquote');
	40
	41	// the last block element parsed
	42	var $last_block_element = '';
	43
	44	// whether or not to protect quotes within { curly braces }
	45	var $protect_braced_quotes = FALSE;
	46
	47	/**
	48	* Auto Typography
	49	*
	50	* This function converts text, making it typographically correct:
	51	* - Converts double spaces into paragraphs.
	52	* - Converts single line breaks into <br /> tags
	53	* - Converts single and double quotes into correctly facing curly quote entities.
	54	* - Converts three dots into ellipsis.
	55	* - Converts double dashes into em-dashes.
	56	* - Converts two spaces into entities
	57	*
	58	* @access public
	59	* @param string
	60	* @param bool whether to reduce more then two consecutive newlines to two
	61	* @return string
	62	*/
	63	function auto_typography($str, $reduce_linebreaks = FALSE)
	64	{
65	if ($str == '')
66	{
67	return '';
68	}
69
70	// Standardize Newlines to make matching easier
71	if (strpos($str, "\r") !== FALSE)
72	{
73	$str = str_replace(array("\r\n", "\r"), "\n", $str);
74	}
75
76	// Reduce line breaks. If there are more than two consecutive linebreaks
77	// we'll compress them down to a maximum of two since there's no benefit to more.
78	if ($reduce_linebreaks === TRUE)
79	{
80	$str = preg_replace("/\n\n+/", "\n\n", $str);
81	}
82
83	// HTML comment tags don't conform to patterns of normal tags, so pull them out separately, only if needed
84	$html_comments = array();
85	if (strpos($str, '<!--') !== FALSE)
86	{
87	if (preg_match_all("#(<!\-\-.*?\-\->)#s", $str, $matches))
88	{
89	for ($i = 0, $total = count($matches[0]); $i < $total; $i++)
90	{
91	$html_comments[] = $matches[0][$i];
92	$str = str_replace($matches[0][$i], '{@HC'.$i.'}', $str);
93	}
94	}
95	}
96
97	// match and yank <pre> tags if they exist. It's cheaper to do this separately since most content will
98	// not contain <pre> tags, and it keeps the PCRE patterns below simpler and faster
99	if (strpos($str, '<pre') !== FALSE)
100	{
101	$str = preg_replace_callback("#<pre.?>.?</pre>#si", array($this, '_protect_characters'), $str);
102	}
103
104	// Convert quotes within tags to temporary markers.
105	$str = preg_replace_callback("#<.+?>#si", array($this, '_protect_characters'), $str);
106
107	// Do the same with braces if necessary
108	if ($this->protect_braced_quotes === TRUE)
109	{
110	$str = preg_replace_callback("#\{.+?\}#si", array($this, '_protect_characters'), $str);
111	}
112
113	// Convert "ignore" tags to temporary marker. The parser splits out the string at every tag
114	// it encounters. Certain inline tags, like image tags, links, span tags, etc. will be
115	// adversely affected if they are split out so we'll convert the opening bracket < temporarily to: {@TAG}
116	$str = preg_replace("#<(/*)(".$this->inline_elements.")([ >])#i", "{@TAG}\\1\\2\\3", $str);
117
118	// Split the string at every tag. This expression creates an array with this prototype:
119	//
120	// [array]
121	// {
122	// [0] = <opening tag>
123	// [1] = Content...
124	// [2] = <closing tag>
125	// Etc...
126	// }
127	$chunks = preg_split('/(<(?:[^<>]+(?:"[^"]"\|\'[^\']\')?)+>)/', $str, -1, PREG_SPLIT_DELIM_CAPTURE\|PREG_SPLIT_NO_EMPTY);
128
129	// Build our finalized string. We cycle through the array, skipping tags, and processing the contained text
130	$str = '';
131	$process = TRUE;
132	$paragraph = FALSE;
133	$current_chunk = 0;
134	$total_chunks = count($chunks);
135
136	foreach ($chunks as $chunk)
137	{
138	$current_chunk++;
139
140	// Are we dealing with a tag? If so, we'll skip the processing for this cycle.
141	// Well also set the "process" flag which allows us to skip <pre> tags and a few other things.
142	if (preg_match("#<(/)(".$this->block_elements.").?>#", $chunk, $match))
143	{
144	if (preg_match("#".$this->skip_elements."#", $match[2]))
145	{
146	$process = ($match[1] == '/') ? TRUE : FALSE;
147	}
148
149	if ($match[1] == '')
150	{
151	$this->last_block_element = $match[2];
152	}
153
154	$str .= $chunk;
155	continue;
156	}
157
158	if ($process == FALSE)
159	{
160	$str .= $chunk;
161	continue;
162	}
163
164	// Force a newline to make sure end tags get processed by _format_newlines()
165	if ($current_chunk == $total_chunks)
166	{
167	$chunk .= "\n";
168	}
169
170	// Convert Newlines into <p> and <br /> tags
171	$str .= $this->_format_newlines($chunk);
172	}
173
174	// No opening block level tag? Add it if needed.
175	if ( ! preg_match("/^\s*<(?:".$this->block_elements.")/i", $str))
176	{
177	$str = preg_replace("/^(.*?)<(".$this->block_elements.")/i", '<p>$1</p><$2', $str);
178	}
179
180	// Convert quotes, elipsis, em-dashes, non-breaking spaces, and ampersands
181	$str = $this->format_characters($str);
182
183	// restore HTML comments
184	for ($i = 0, $total = count($html_comments); $i < $total; $i++)
185	{
186	// remove surrounding paragraph tags, but only if there's an opening paragraph tag
187	// otherwise HTML comments at the ends of paragraphs will have the closing tag removed
188	// if '<p>{@HC1}' then replace <p>{@HC1}</p> with the comment, else replace only {@HC1} with the comment
189	$str = preg_replace('#(?(?=<p>\{@HC'.$i.'\})<p>\{@HC'.$i.'\}(\s*</p>)\|\{@HC'.$i.'\})#s', $html_comments[$i], $str);
190	}
191
192	// Final clean up
193	$table = array(
194
195	// If the user submitted their own paragraph tags within the text
196	// we will retain them instead of using our tags.
197	'/(<p[^>*?]>)<p>/' => '$1', // <?php BBEdit syntax coloring bug fix
198
199	// Reduce multiple instances of opening/closing paragraph tags to a single one
200	'#(</p>)+#' => '</p>',
201	'/(<p>\W*<p>)+/' => '<p>',
202
203	// Clean up stray paragraph tags that appear before block level elements
204	'#<p></p><('.$this->block_elements.')#' => '<$1',
205
206	// Clean up stray non-breaking spaces preceeding block elements
207	'#( \s*)+<('.$this->block_elements.')#' => ' <$2',
208
209	// Replace the temporary markers we added earlier
210	'/\{@TAG\}/' => '<',
211	'/\{@DQ\}/' => '"',
212	'/\{@SQ\}/' => "'",
213	'/\{@DD\}/' => '--',
214	'/\{@NBS\}/' => ' ',
215
216	// An unintended consequence of the _format_newlines function is that
217	// some of the newlines get truncated, resulting in <p> tags
218	// starting immediately after <block> tags on the same line.
219	// This forces a newline after such occurrences, which looks much nicer.
220	"/><p>\n/" => ">\n<p>",
221
222	// Similarly, there might be cases where a closing </block> will follow
223	// a closing </p> tag, so we'll correct it by adding a newline in between
224	"#</p></#" => "</p>\n</"
225	);
226
227	// Do we need to reduce empty lines?
228	if ($reduce_linebreaks === TRUE)
229	{
230	$table['#<p>\n*</p>#'] = '';
231	}
232	else
233	{
234	// If we have empty paragraph tags we add a non-breaking space
235	// otherwise most browsers won't treat them as true paragraphs
236	$table['#<p></p>#'] = '<p> </p>';
237	}
238
239	return preg_replace(array_keys($table), $table, $str);
240
241	}
242
243	// --------------------------------------------------------------------
244
245	/**
246	* Format Characters
247	*
248	* This function mainly converts double and single quotes
249	* to curly entities, but it also converts em-dashes,
250	* double spaces, and ampersands
251	*
252	* @access public
253	* @param string
254	* @return string
255	*/
256	function format_characters($str)
257	{
258	static $table;
259
260	if ( ! isset($table))
261	{
262	$table = array(
263	// nested smart quotes, opening and closing
264	// note that rules for grammar (English) allow only for two levels deep
265	// and that single quotes are _supposed_ to always be on the outside
266	// but we'll accommodate both
267	// Note that in all cases, whitespace is the primary determining factor
268	// on which direction to curl, with non-word characters like punctuation
269	// being a secondary factor only after whitespace is addressed.
270	'/\'"(\s\|$)/' => '’”$1',
271	'/(^\|\s\|<p>)\'"/' => '$1‘“',
272	'/\'"(\W)/' => '’”$1',
273	'/(\W)\'"/' => '$1‘“',
274	'/"\'(\s\|$)/' => '”’$1',
275	'/(^\|\s\|<p>)"\'/' => '$1“‘',
276	'/"\'(\W)/' => '”’$1',
277	'/(\W)"\'/' => '$1“‘',
278
279	// single quote smart quotes
280	'/\'(\s\|$)/' => '’$1',
281	'/(^\|\s\|<p>)\'/' => '$1‘',
282	'/\'(\W)/' => '’$1',
283	'/(\W)\'/' => '$1‘',
284
285	// double quote smart quotes
286	'/"(\s\|$)/' => '”$1',
287	'/(^\|\s\|<p>)"/' => '$1“',
288	'/"(\W)/' => '”$1',
289	'/(\W)"/' => '$1“',
290
291	// apostrophes
292	"/(\w)'(\w)/" => '$1’$2',
293
294	// Em dash and ellipses dots
295	'/\s?\-\-\s?/' => '—',
296	'/(\w)\.{3}/' => '$1…',
297
298	// double space after sentences
299	'/(\W) /' => '$1  ',
300
301	// ampersands, if not a character entity
302	'/&(?!#?[a-zA-Z0-9]{2,};)/' => '&'
303	);
304	}
305
306	return preg_replace(array_keys($table), $table, $str);
307	}
308
309	// --------------------------------------------------------------------
310
311	/**
312	* Format Newlines
313	*
314	* Converts newline characters into either <p> tags or <br />
315	*
316	* @access public
317	* @param string
318	* @return string
319	*/
320	function _format_newlines($str)
321	{
322	if ($str == '')
323	{
324	return $str;
325	}
326
327	if (strpos($str, "\n") === FALSE && ! in_array($this->last_block_element, $this->inner_block_required))
328	{
329	return $str;
330	}
331
332	// Convert two consecutive newlines to paragraphs
333	$str = str_replace("\n\n", "</p>\n\n<p>", $str);
334
335	// Convert single spaces to <br /> tags
336	$str = preg_replace("/([^\n])(\n)([^\n])/", "\\1<br />\\2\\3", $str);
337
338	// Wrap the whole enchilada in enclosing paragraphs
339	if ($str != "\n")
340	{
341	// We trim off the right-side new line so that the closing </p> tag
342	// will be positioned immediately following the string, matching
343	// the behavior of the opening <p> tag
344	$str = '<p>'.rtrim($str).'</p>';
345	}
346
347	// Remove empty paragraphs if they are on the first line, as this
348	// is a potential unintended consequence of the previous code
349	$str = preg_replace("/<p><\/p>(.*)/", "\\1", $str, 1);
350
351	return $str;
352	}
353
354	// ------------------------------------------------------------------------
355
356	/**
357	* Protect Characters
358	*
359	* Protects special characters from being formatted later
360	* We don't want quotes converted within tags so we'll temporarily convert them to {@DQ} and {@SQ}
361	* and we don't want double dashes converted to emdash entities, so they are marked with {@DD}
362	* likewise double spaces are converted to {@NBS} to prevent entity conversion
363	*
364	* @access public
365	* @param array
366	* @return string
367	*/
368	function _protect_characters($match)
369	{
370	return str_replace(array("'",'"','--',' '), array('{@SQ}', '{@DQ}', '{@DD}', '{@NBS}'), $match[0]);
371	}
372
373	// --------------------------------------------------------------------
374
375	/**
376	* Convert newlines to HTML line breaks except within PRE tags
377	*
378	* @access public
379	* @param string
380	* @return string
381	*/
382	function nl2br_except_pre($str)
383	{
384	$ex = explode("pre>",$str);
385	$ct = count($ex);
386
387	$newstr = "";
388	for ($i = 0; $i < $ct; $i++)
389	{
390	if (($i % 2) == 0)
391	{
392	$newstr .= nl2br($ex[$i]);
393	}
394	else
395	{
396	$newstr .= $ex[$i];
397	}
398
399	if ($ct - 1 != $i)
400	$newstr .= "pre>";
401	}
402
403	return $newstr;
404	}
405
406	}
407	// END Typography Class
408
409	/* End of file Typography.php */
410	/* Location: ./system/libraries/Typography.php */