tags var $block_elements = 'div|blockquote|pre|code|h\d|script|ol|ul'; // Elements that should not have

and
tags within them. var $skip_elements = 'pre|ol|ul'; // Tags we want the parser to completely ignore when splitting the string. var $ignore_elements = 'a|b|i|em|strong|span|img|li'; // Whether to allow Javascript event handlers to be sumitted inside tags var $allow_js_event_handlers = FALSE; /** * Main Processing Function * */ function convert($str) { if ($str == '') { return ''; } $str = ' '.$str.' '; // 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 line * breaks we'll compress them down to a maximum * of two since there's no benefit to more. * */ $str = preg_replace("/\n\n+/", "\n\n", $str); /* * Do we allow JavaScript event handlers? * * If not, we strip them from within all tags */ if ($this->allow_js_event_handlers == FALSE) { $event_handlers = array('[^a-z_\-]on\w*','xmlns'); $str = preg_replace("#<([^><]+?)(".implode('|', $event_handlers).")(\s*=\s*[^><]*)([><]*)#i", "<\\1\\4", $str); } /* * Convert quotes within tags to temporary marker * * We don't want quotes converted within * tags so we'll temporarily convert them to * {@DQ} and {@SQ} * */ if (preg_match_all("#\<.+?>#si", $str, $matches)) { for ($i = 0; $i < count($matches['0']); $i++) { $str = str_replace($matches['0'][$i], str_replace(array("'",'"'), array('{@SQ}', '{@DQ}'), $matches['0'][$i]), $str); } } /* * Add closing/opening paragraph tags before/after "block" elements * * Since block elements (like ,

, etc.) do not get
		 * wrapped in paragraph tags we will add a closing 

tag just before * each block element starts and an opening

tag right after the block element * ends. Later on we'll do some further clean up. * */ $str = preg_replace("#(<)(".$this->block_elements.")(.*?>)#", "

\\1\\2\\3", $str); $str = preg_replace("#(block_elements.")(.*?>)#", "\\1\\2\\3

", $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 < temporarily to: {@TAG} * */ $str = preg_replace("#<(/*)(".$this->ignore_elements.")#i", "{@TAG}\\1\\2", $str); /* * Split the string at every tag * * This creates an array with this prototype: * * [array] * { * [0] = * [1] = Content contained between the tags * [2] = * Etc... * } * */ $chunks = preg_split('/(<(?:[^<>]+(?:"[^"]*"|\'[^\']*\')?)+>)/', $str, -1, PREG_SPLIT_DELIM_CAPTURE|PREG_SPLIT_NO_EMPTY); /* * Build our finalized string * * We'll cycle through the array, skipping tags, * and processing the contained text * */ $str = ''; $process = TRUE; foreach ($chunks as $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

 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;		
				}
		
				$str .= $chunk;
				continue;
			}
		
			if ($process == FALSE)
			{
				$str .= $chunk;
				continue;
			}
			
			//  Convert Newlines into 

and
tags $str .= $this->format_newlines($chunk); } // FINAL CLEAN UP // IMPORTANT: DO NOT ALTER THE ORDER OF THE ITEMS BELOW! /* * Clean up paragraph tags before/after "block" elements * * Earlier we added

tags before/after block level elements. * Then, we added paragraph tags around double line breaks. This * potentially created incorrectly formatted paragraphs so we'll * clean it up here. * */ $str = preg_replace("#

({@TAG}.*?)(".$this->block_elements.")(.*?>)#", "\\1\\2\\3", $str); $str = preg_replace("#({@TAG}/.*?)(".$this->block_elements.")(.*?>)

#", "\\1\\2\\3", $str); // Convert Quotes and other characters $str = $this->format_characters($str); // Fix an artifact that happens during the paragraph replacement $str = preg_replace('#(

\n*

)#', '', $str); // If the user submitted their own paragraph tags with class data // in them we will retain them instead of using our tags. $str = preg_replace('#()

#', "\\1", $str); //

', '

', '

', '

', '{@TAG}', '{@DQ}', '{@SQ}', '

' ), array( '

', '

', '

', '

', '<', '"', "'", '' ), $str ); return $str; } // -------------------------------------------------------------------- /** * Format Characters * * This function mainly converts double and single quotes * to curly entities, but it also converts em-dashes, * double spaces, and ampersands */ function format_characters($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 '/(^|\W|\s)\'"/' => '$1‘“', '/\'"(\s|\W|$)/' => '’”$1', '/(^|\W|\s)"\'/' => '$1“‘', '/"\'(\s|\W|$)/' => '”’$1', // single quote smart quotes '/\'(\s|\W|$)/' => '’$1', '/(^|\W|\s)\'/' => '$1‘', // double quote smart quotes '/"(\s|\W|$)/' => '”$1', '/(^|\W|\s)"/' => '$1“', // apostrophes "/(\w)'(\w)/" => '$1’$2', // Em dash and ellipses dots '/\s?\-\-\s?/' => '—', '/\w\.{3}/' => '…', // double space after sentences '/(\W)\s{2}/' => '$1  ', // ampersands, if not a character entity '/&(?!#?[a-zA-Z0-9]{2,};)/' => '&' ); } return preg_replace(array_keys($table), $table, $str); } // -------------------------------------------------------------------- /** * Format Newlines * * Converts newline characters into either

tags or
* */ function format_newlines($str) { if ($str == '') { return $str; } if (strpos($str, "\n") === FALSE) { return '

'.$str.'

'; } $str = str_replace("\n\n", "

\n\n

", $str); $str = preg_replace("/([^\n])(\n)([^\n])/", "\\1
\\2\\3", $str); return '

'.$str.'

'; } // -------------------------------------------------------------------- /** * Allow JavaScript Event Handlers? * * For security reasons, by default we disallow JS event handlers * */ function allow_js_event_handlers($val = FALSE) { $this->allow_js_event_handlers = ($val === FALSE) ? FALSE : TRUE; } } // END Typography Class /* End of file Typography.php */ /* Location: ./system/libraries/Typography.php */