balmet.com

inline.php (5535B)

---

 <?php
 /**
  * "Inline" diff renderer.
  *
  * Copyright 2004-2010 The Horde Project (http://www.horde.org/)
  *
  * See the enclosed file COPYING for license information (LGPL). If you did
  * not receive this file, see http://opensource.org/licenses/lgpl-license.php.
  *
  * @author  Ciprian Popovici
  * @package Text_Diff
  */
 
 /** Text_Diff_Renderer */
 
 // WP #7391
 require_once dirname(dirname(__FILE__)) . '/Renderer.php';
 
 /**
  * "Inline" diff renderer.
  *
  * This class renders diffs in the Wiki-style "inline" format.
  *
  * @author  Ciprian Popovici
  * @package Text_Diff
  */
 class Text_Diff_Renderer_inline extends Text_Diff_Renderer {
 
     /**
      * Number of leading context "lines" to preserve.
      *
      * @var integer
      */
     var $_leading_context_lines = 10000;
 
     /**
      * Number of trailing context "lines" to preserve.
      *
      * @var integer
      */
     var $_trailing_context_lines = 10000;
 
     /**
      * Prefix for inserted text.
      *
      * @var string
      */
     var $_ins_prefix = '<ins>';
 
     /**
      * Suffix for inserted text.
      *
      * @var string
      */
     var $_ins_suffix = '</ins>';
 
     /**
      * Prefix for deleted text.
      *
      * @var string
      */
     var $_del_prefix = '<del>';
 
     /**
      * Suffix for deleted text.
      *
      * @var string
      */
     var $_del_suffix = '</del>';
 
     /**
      * Header for each change block.
      *
      * @var string
      */
     var $_block_header = '';
 
     /**
      * Whether to split down to character-level.
      *
      * @var boolean
      */
     var $_split_characters = false;
 
     /**
      * What are we currently splitting on? Used to recurse to show word-level
      * or character-level changes.
      *
      * @var string
      */
     var $_split_level = 'lines';
 
     function _blockHeader($xbeg, $xlen, $ybeg, $ylen)
     {
         return $this->_block_header;
     }
 
     function _startBlock($header)
     {
         return $header;
     }
 
     function _lines($lines, $prefix = ' ', $encode = true)
     {
         if ($encode) {
             array_walk($lines, array(&$this, '_encode'));
         }
 
         if ($this->_split_level == 'lines') {
             return implode("\n", $lines) . "\n";
         } else {
             return implode('', $lines);
         }
     }
 
     function _added($lines)
     {
         array_walk($lines, array(&$this, '_encode'));
         $lines[0] = $this->_ins_prefix . $lines[0];
         $lines[count($lines) - 1] .= $this->_ins_suffix;
         return $this->_lines($lines, ' ', false);
     }
 
     function _deleted($lines, $words = false)
     {
         array_walk($lines, array(&$this, '_encode'));
         $lines[0] = $this->_del_prefix . $lines[0];
         $lines[count($lines) - 1] .= $this->_del_suffix;
         return $this->_lines($lines, ' ', false);
     }
 
     function _changed($orig, $final)
     {
         /* If we've already split on characters, just display. */
         if ($this->_split_level == 'characters') {
             return $this->_deleted($orig)
                 . $this->_added($final);
         }
 
         /* If we've already split on words, just display. */
         if ($this->_split_level == 'words') {
             $prefix = '';
             while ($orig[0] !== false && $final[0] !== false &&
                    substr($orig[0], 0, 1) == ' ' &&
                    substr($final[0], 0, 1) == ' ') {
                 $prefix .= substr($orig[0], 0, 1);
                 $orig[0] = substr($orig[0], 1);
                 $final[0] = substr($final[0], 1);
             }
             return $prefix . $this->_deleted($orig) . $this->_added($final);
         }
 
         $text1 = implode("\n", $orig);
         $text2 = implode("\n", $final);
 
         /* Non-printing newline marker. */
         $nl = "\0";
 
         if ($this->_split_characters) {
             $diff = new Text_Diff('native',
                                   array(preg_split('//', $text1),
                                         preg_split('//', $text2)));
         } else {
             /* We want to split on word boundaries, but we need to preserve
              * whitespace as well. Therefore we split on words, but include
              * all blocks of whitespace in the wordlist. */
             $diff = new Text_Diff('native',
                                   array($this->_splitOnWords($text1, $nl),
                                         $this->_splitOnWords($text2, $nl)));
         }
 
         /* Get the diff in inline format. */
         $renderer = new Text_Diff_Renderer_inline
             (array_merge($this->getParams(),
                          array('split_level' => $this->_split_characters ? 'characters' : 'words')));
 
         /* Run the diff and get the output. */
         return str_replace($nl, "\n", $renderer->render($diff)) . "\n";
     }
 
     function _splitOnWords($string, $newlineEscape = "\n")
     {
         // Ignore \0; otherwise the while loop will never finish.
         $string = str_replace("\0", '', $string);
 
         $words = array();
         $length = strlen($string);
         $pos = 0;
 
         while ($pos < $length) {
             // Eat a word with any preceding whitespace.
             $spaces = strspn(substr($string, $pos), " \n");
             $nextpos = strcspn(substr($string, $pos + $spaces), " \n");
             $words[] = str_replace("\n", $newlineEscape, substr($string, $pos, $spaces + $nextpos));
             $pos += $spaces + $nextpos;
         }
 
         return $words;
     }
 
     function _encode(&$string)
     {
         $string = htmlspecialchars($string);
     }
 
 }