| <?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) 2006, 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) | |
| { | |
| $ex = explode("pre>",$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 $newstr; | |
| } | |
| } | |
| // ------------------------------------------------------------------------ | |
| /** | |
| * Auto Typography Wrapper Function | |
| * | |
| * | |
| * @access public | |
| * @param string | |
| * @return string | |
| */ | |
| if (! function_exists('auto_typography')) | |
| { | |
| function auto_typography($str) | |
| { | |
| $TYPE = new Auto_typography(); | |
| return $TYPE->convert($str); | |
| } | |
| } | |
| // ------------------------------------------------------------------------ | |
| /** | |
| * Auto Typography Class | |
| * | |
| * | |
| * @access private | |
| * @category Helpers | |
| * @author ExpressionEngine Dev Team | |
| * @link http://codeigniter.com/user_guide/helpers/ | |
| */ | |
| class Auto_typography { | |
| // Block level elements that should not be wrapped inside <p> tags | |
| var $block_elements = 'div|blockquote|pre|code|h\d|script|ol|ul'; | |
| // Elements that should not have <p> and <br /> tags within them. | |
| var $skip_elements = 'pre|ol|ul'; | |
| // Tags we want the parser to completely ignore when splitting the string. | |
| var $ignore_elements = 'a|b|i|em|strong|span|img|li'; | |
| /** | |
| * Main Processing Function | |
| * | |
| */ | |
| function convert($str) | |
| { | |
| if ($str == '') | |
| { | |
| return ''; | |
| } | |
| $str = ' '.$str.' '; | |
| // Standardize Newlines to make matching easier | |
| $str = preg_replace("/(\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); | |
| /* | |
| * 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 <blockquotes>, <pre>, etc.) do not get | |
| * wrapped in paragraph tags we will add a closing </p> tag just before | |
| * each block element starts and an opening <p> tag right after the block element | |
| * ends. Later on we'll do some further clean up. | |
| * | |
| */ | |
| $str = preg_replace("#(<)(".$this->block_elements.")(.*?>)#", "</p>\\1\\2\\3", $str); | |
| $str = preg_replace("#(</)(".$this->block_elements.")(.*?>)#", "\\1\\2\\3<p>", $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] = <opening tag> | |
| * [1] = Content contained between the tags | |
| * [2] = <closing tag> | |
| * 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 $chunk) | |
| { | |
| /* | |
| * Are we dealing with a tag? | |
| * | |
| * If so, we'll skip the processing for this cycle. | |
| * Well also set the "process" flag which allows us | |
| * to skip <pre> tags and a few other things. | |
| * | |
| */ | |
| if (preg_match("#<(/*)(".$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); | |
| } | |
| // FINAL CLEAN UP | |
| // IMPORTANT: DO NOT ALTER THE ORDER OF THE ITEMS BELOW! | |
| /* | |
| * Clean up paragraph tags before/after "block" elements | |
| * | |
| * Earlier we added <p></p> 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. | |
| * | |
| */ | |
| $str = preg_replace("#<p>({@TAG}.*?)(".$this->block_elements.")(.*?>)#", "\\1\\2\\3", $str); | |
| $str = preg_replace("#({@TAG}/.*?)(".$this->block_elements.")(.*?>)</p>#", "\\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('#(<p>\n*</p>)#', '', $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('#(<p.*?>)<p>#', "\\1", $str); | |
| // Final clean up | |
| $str = str_replace( | |
| array( | |
| '</p></p>', | |
| '</p><p>', | |
| '<p> ', | |
| ' </p>', | |
| '{@TAG}', | |
| '{@DQ}', | |
| '{@SQ}', | |
| '<p></p>' | |
| ), | |
| array( | |
| '</p>', | |
| '<p>', | |
| '<p>', | |
| '</p>', | |
| '<', | |
| '"', | |
| "'", | |
| '' | |
| ), | |
| $str | |
| ); | |
| return $str; | |
| } | |
| // -------------------------------------------------------------------- | |
| /** | |
| * Format Characters | |
| * | |
| * This function mainly converts double and single quotes | |
| * to entities, but since these are directional, it does | |
| * it based on some rules. It also converts em-dashes | |
| * and a couple other things. | |
| */ | |
| function format_characters($str) | |
| { | |
| $table = array( | |
| ' "' => " “", | |
| '" ' => "” ", | |
| " '" => " ‘", | |
| "' " => "’ ", | |
| '>"' => ">“", | |
| '"<' => "”<", | |
| ">'" => ">‘", | |
| "'<" => "’<", | |
| "\"." => "”.", | |
| "\"," => "”,", | |
| "\";" => "”;", | |
| "\":" => "”:", | |
| "\"!" => "”!", | |
| "\"?" => "”?", | |
| ". " => ". ", | |
| "? " => "? ", | |
| "! " => "! ", | |
| ": " => ": ", | |
| ); | |
| // These deal with quotes within quotes, like: "'hi here'" | |
| $start = 0; | |
| $space = array("\n", "\t", " "); | |
| while(TRUE) | |
| { | |
| $current = strpos(substr($str, $start), "\"'"); | |
| if ($current === FALSE) break; | |
| $one_before = substr($str, $start+$current-1, 1); | |
| $one_after = substr($str, $start+$current+2, 1); | |
| if (! in_array($one_after, $space, TRUE) && $one_after != "<") | |
| { | |
| $str = str_replace( $one_before."\"'".$one_after, | |
| $one_before."“‘".$one_after, | |
| $str); | |
| } | |
| elseif (! in_array($one_before, $space, TRUE) && (in_array($one_after, $space, TRUE) OR $one_after == '<')) | |
| { | |
| $str = str_replace( $one_before."\"'".$one_after, | |
| $one_before."”’".$one_after, | |
| $str); | |
| } | |
| $start = $start+$current+2; | |
| } | |
| $start = 0; | |
| while(TRUE) | |
| { | |
| $current = strpos(substr($str, $start), "'\""); | |
| if ($current === FALSE) break; | |
| $one_before = substr($str, $start+$current-1, 1); | |
| $one_after = substr($str, $start+$current+2, 1); | |
| if ( in_array($one_before, $space, TRUE) && ! in_array($one_after, $space, TRUE) && $one_after != "<") | |
| { | |
| $str = str_replace( $one_before."'\"".$one_after, | |
| $one_before."‘“".$one_after, | |
| $str); | |
| } | |
| elseif (! in_array($one_before, $space, TRUE) && $one_before != ">") | |
| { | |
| $str = str_replace( $one_before."'\"".$one_after, | |
| $one_before."’”".$one_after, | |
| $str); | |
| } | |
| $start = $start+$current+2; | |
| } | |
| // Are there quotes within a word, as in: ("something") | |
| if (preg_match_all("/(.)\"(\S+?)\"(.)/", $str, $matches)) | |
| { | |
| for ($i=0, $s=sizeof($matches['0']); $i < $s; ++$i) | |
| { | |
| if (! in_array($matches['1'][$i], $space, TRUE) && ! in_array($matches['3'][$i], $space, TRUE)) | |
| { | |
| $str = str_replace( $matches['0'][$i], | |
| $matches['1'][$i]."“".$matches['2'][$i]."”".$matches['3'][$i], | |
| $str); | |
| } | |
| } | |
| } | |
| if (preg_match_all("/(.)\'(\S+?)\'(.)/", $str, $matches)) | |
| { | |
| for ($i=0, $s=sizeof($matches['0']); $i < $s; ++$i) | |
| { | |
| if (! in_array($matches['1'][$i], $space, TRUE) && ! in_array($matches['3'][$i], $space, TRUE)) | |
| { | |
| $str = str_replace( $matches['0'][$i], | |
| $matches['1'][$i]."‘".$matches['2'][$i]."’".$matches['3'][$i], | |
| $str); | |
| } | |
| } | |
| } | |
| // How about one apostrophe, as in Rick's | |
| $start = 0; | |
| while(TRUE) | |
| { | |
| $current = strpos(substr($str, $start), "'"); | |
| if ($current === FALSE) break; | |
| $one_before = substr($str, $start+$current-1, 1); | |
| $one_after = substr($str, $start+$current+1, 1); | |
| if (! in_array($one_before, $space, TRUE) && ! in_array($one_after, $space, TRUE)) | |
| { | |
| $str = str_replace( $one_before."'".$one_after, | |
| $one_before."’".$one_after, | |
| $str); | |
| } | |
| $start = $start+$current+2; | |
| } | |
| // Em-dashes | |
| $start = 0; | |
| while(TRUE) | |
| { | |
| $current = strpos(substr($str, $start), "--"); | |
| if ($current === FALSE) break; | |
| $one_before = substr($str, $start+$current-1, 1); | |
| $one_after = substr($str, $start+$current+2, 1); | |
| $two_before = substr($str, $start+$current-2, 1); | |
| $two_after = substr($str, $start+$current+3, 1); | |
| if ((! in_array($one_before, $space, TRUE) && ! in_array($one_after, $space, TRUE)) | |
| OR | |
| (! in_array($two_before, $space, TRUE) && ! in_array($two_after, $space, TRUE) && $one_before == ' ' && $one_after == ' ') | |
| ) | |
| { | |
| $str = str_replace( $two_before.$one_before."--".$one_after.$two_after, | |
| $two_before.trim($one_before)."—".trim($one_after).$two_after, | |
| $str); | |
| } | |
| $start = $start+$current+2; | |
| } | |
| // Ellipsis | |
| $str = preg_replace("#(\w)\.\.\.(\s|<br />|</p>)#", "\\1…\\2", $str); | |
| $str = preg_replace("#(\s|<br />|</p>)\.\.\.(\w)#", "\\1…\\2", $str); | |
| // Run the translation array we defined above | |
| $str = str_replace(array_keys($table), array_values($table), $str); | |
| // If there are any stray double quotes we'll catch them here | |
| $start = 0; | |
| while(TRUE) | |
| { | |
| $current = strpos(substr($str, $start), '"'); | |
| if ($current === FALSE) break; | |
| $one_before = substr($str, $start+$current-1, 1); | |
| $one_after = substr($str, $start+$current+1, 1); | |
| if (! in_array($one_after, $space, TRUE)) | |
| { | |
| $str = str_replace( $one_before.'"'.$one_after, | |
| $one_before."“".$one_after, | |
| $str); | |
| } | |
| elseif(! in_array($one_before, $space, TRUE)) | |
| { | |
| $str = str_replace( $one_before."'".$one_after, | |
| $one_before."”".$one_after, | |
| $str); | |
| } | |
| $start = $start+$current+2; | |
| } | |
| $start = 0; | |
| while(TRUE) | |
| { | |
| $current = strpos(substr($str, $start), "'"); | |
| if ($current === FALSE) break; | |
| $one_before = substr($str, $start+$current-1, 1); | |
| $one_after = substr($str, $start+$current+1, 1); | |
| if (! in_array($one_after, $space, TRUE)) | |
| { | |
| $str = str_replace( $one_before."'".$one_after, | |
| $one_before."‘".$one_after, | |
| $str); | |
| } | |
| elseif(! in_array($one_before, $space, TRUE)) | |
| { | |
| $str = str_replace( $one_before."'".$one_after, | |
| $one_before."’".$one_after, | |
| $str); | |
| } | |
| $start = $start+$current+2; | |
| } | |
| return $str; | |
| } | |
| // -------------------------------------------------------------------- | |
| /** | |
| * Format Newlines | |
| * | |
| * Converts newline characters into either <p> tags or <br /> | |
| * | |
| */ | |
| function format_newlines($str) | |
| { | |
| if ($str == '') | |
| { | |
| return $str; | |
| } | |
| if (strpos($str, "\n") === FALSE) | |
| { | |
| return '<p>'.$str.'</p>'; | |
| } | |
| $str = str_replace("\n\n", "</p>\n\n<p>", $str); | |
| $str = preg_replace("/([^\n])(\n)([^\n])/", "\\1<br />\\2\\3", $str); | |
| return '<p>'.$str.'</p>'; | |
| } | |
| } | |