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<?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, 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> tagsvar $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';// Tags we want the parser to completely ignore when splitting the string.var $inline_elements = 'a|abbr|acronym|b|bdo|br|button|cite|code|del|dfn|em|i|img|ins|input|label|map|kbd|samp|select|span|strong|sub|sup|textarea|var';// whether or not to protect quotes within { curly braces }var $protect_braced_quotes = FALSE;/*** Nothing to do here...**/function CI_Typography(){}/*** Auto Typography** This function converts text, making it typographically correct:* - Converts double spaces into paragraphs.* - Converts single line breaks into <br /> tags* - Converts single and double quotes into correctly facing curly quote entities.* - Converts three dots into ellipsis.* - Converts double dashes into em-dashes.* - Converts two spaces into entities** @access public* @param string* @param bool whether to strip javascript event handlers for security* @param bool whether to reduce more then two consecutive newlines to two* @return string*/function auto_typography($str, $strip_js_event_handlers = TRUE, $reduce_linebreaks = FALSE){if ($str == ''){return '';}// Standardize Newlines to make matching easierif (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", $str);}// Do we allow JavaScript event handlers? If not, we strip them from within all tagsif ($strip_js_event_handlers === TRUE){$str = preg_replace("#<([^><]+?)([^a-z_\-]on\w*|xmlns)(\s*=\s*[^><]*)([><]*)#i", "<\\1\\4", $str);}// Convert quotes within tags to temporary markers. 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]),$str);}}if ($this->protect_braced_quotes === TRUE){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]),$str);}}}// Convert "ignore" tags to temporary marker. The parser splits out the string at every tag// it encounters. Certain inline tags, like image tags, links, span tags, etc. will be// adversely affected if they are split out so we'll convert the opening bracket < temporarily to: {@TAG}$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;foreach ($chunks as $chunk){// Are we dealing with a tag? If so, we'll skip the processing for this cycle.// Well also set the "process" flag which allows us to skip <pre> tags and a few other things.if (preg_match("#<(/*)(".$this->block_elements.").*?\>#", $chunk, $match)){if (preg_match("#".$this->skip_elements."#", $match[2])){$process = ($match[1] == '/') ? TRUE : FALSE;}$str .= $chunk;continue;}if ($process == FALSE){$str .= $chunk;continue;}// Convert Newlines into <p> and <br /> tags$str .= $this->_format_newlines($chunk);}// is the whole of the content inside a block level element?if ( ! preg_match("/^<(?:".$this->block_elements.")/i", $str, $match)){$str = "<p>{$str}</p>";}// Convert quotes, elipsis, and em-dashes$str = $this->format_characters($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>/' => '$1', // <?php BBEdit syntax coloring bug fix// Reduce multiple instances of opening/closing paragraph tags to a single one'#(</p>)+#' => '</p>','/(<p><p>)+/' => '<p>',// Clean up stray paragraph tags that appear before block level elements'#<p></p><('.$this->block_elements.')#' => '<$1',// Replace the temporary markers we added earlier'/\{@TAG\}/' => '<','/\{@DQ\}/' => '"','/\{@SQ\}/' => "'");// Do we need to reduce empty lines?if ($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> </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'/(^|\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}/' => '$1…',// double space after sentences'/(\W) /' => '$1 ',// ampersands, if not a character entity'/&(?!#?[a-zA-Z0-9]{2,};)/' => '&');}return preg_replace(array_keys($table), $table, $str);}// --------------------------------------------------------------------/*** Format Newlines** Converts newline characters into either <p> tags or <br />** @access public* @param string* @return string*/function _format_newlines($str){if ($str == ''){return $str;}if (strpos($str, "\n") === FALSE){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", $str);// Wrap the whole enchilada in enclosing paragraphsif ($str != "\n"){$str = '<p>'.$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 $str;}// ------------------------------------------------------------------------/*** Convert newlines to HTML line breaks except within PRE tags** @access public* @param string* @return string*/function nl2br_except_pre($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 */