| <?php if (!defined('BASEPATH')) exit('No direct script access allowed'); |
| /** |
| * Code Igniter |
| * |
| * An open source application development framework for PHP 4.3.2 or newer |
| * |
| * @package CodeIgniter |
| * @author Rick Ellis |
| * @copyright Copyright (c) 2006, pMachine, Inc. |
| * @license http://www.codeignitor.com/user_guide/license.html |
| * @link http://www.codeigniter.com |
| * @since Version 1.0 |
| * @filesource |
| */ |
| |
| // ------------------------------------------------------------------------ |
| |
| /** |
| * Code Igniter Typography Helpers |
| * |
| * @package CodeIgniter |
| * @subpackage Helpers |
| * @category Helpers |
| * @author Rick Ellis |
| * @link http://www.codeigniter.com/user_guide/helpers/typography_helper.html |
| */ |
| |
| // ------------------------------------------------------------------------ |
| |
| /** |
| * 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 $newstr; |
| } |
| |
| // ------------------------------------------------------------------------ |
| |
| /** |
| * Auto Typography Wrapper Function |
| * |
| * |
| * @access public |
| * @parm string |
| * @return string |
| */ |
| function auto_typography($str) |
| { |
| $TYPE = new Auto_typography(); |
| return $TYPE->convert($str); |
| } |
| |
| // ------------------------------------------------------------------------ |
| |
| /** |
| * Auto Typography Class |
| * |
| * |
| * @access private |
| * @category Helpers |
| * @author Rick Ellis |
| * @author Paul Burdick |
| * @link http://www.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|un'; |
| |
| // 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 tempoarary 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); |
| } |
| } |
| |
| /* |
| * Convert "ignore" tags to tempoarary 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); |
| } |
| |
| // Convert Quotes and other characters |
| $str = $this->format_characters($str); |
| |
| // We'll swap our temporary markers back and do some clean up. |
| $str = preg_replace('#(<p>\n*</p>)#', '', $str); |
| $str = preg_replace('#(<p.*?>)<p>#', "\\1", $str); |
| |
| $str = str_replace( |
| array('</p></p>', '</p><p>', '{{{tag}}}', '{{{DQ}}}', '{{{SQ}}}'), |
| array('</p>', '<p>', '<', '"', "'"), |
| $str |
| ); |
| |
| return trim($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) && $one_after != "<") |
| { |
| $str = str_replace( $one_before."\"'".$one_after, |
| $one_before."“‘".$one_after, |
| $str); |
| } |
| elseif ( ! in_array($one_before, $space) && (in_array($one_after, $space) 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, $space) && ! in_array($one_after, $space) && $one_after != "<") |
| { |
| $str = str_replace( $one_before."'\"".$one_after, |
| $one_before."‘“".$one_after, |
| $str); |
| } |
| elseif ( ! in_array($one_before, $space) && $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], $space) && ! in_array($matches['3'][$i], $space)) |
| { |
| $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], $space) && ! in_array($matches['3'][$i], $space)) |
| { |
| $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, $space) && ! in_array($one_after, $space)) |
| { |
| $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, $space) && ! in_array($one_after, $space)) |
| OR |
| ( ! in_array($two_before, $space) && ! in_array($two_after, $space) && $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)) |
| { |
| $str = str_replace( $one_before.'"'.$one_after, |
| $one_before."“".$one_after, |
| $str); |
| } |
| elseif( ! in_array($one_before, $space)) |
| { |
| $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)) |
| { |
| $str = str_replace( $one_before."'".$one_after, |
| $one_before."‘".$one_after, |
| $str); |
| } |
| elseif( ! in_array($one_before, $space)) |
| { |
| $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>'; |
| } |
| } |
| |
| |
| ?> |