1<?php 2 3namespace App\Utils; 4 5/** 6 * Unified diff renderer. 7 * 8 * This class renders the diff in classic "unified diff" format and extends the 9 * Horde Text_Diff library https://www.horde.org/libraries/Horde_Text_Diff 10 */ 11class Diff extends \Horde_Text_Diff_Renderer 12{ 13 /** 14 * Number of leading context "lines" to preserve. 15 */ 16 public $_leading_context_lines = 4; 17 18 /** 19 * Number of trailing context "lines" to preserve. 20 */ 21 public $_trailing_context_lines = 4; 22 23 /** 24 * Class constructor. 25 */ 26 public function __construct($d) 27 { 28 $this->diff = $d; 29 parent::__construct(); 30 } 31 32 public function _blockHeader($xbeg, $xlen, $ybeg, $ylen) 33 { 34 $removed = $xlen - $ylen; 35 if ($removed > 0) { 36 return '<span class="diffheader">Line '.$xbeg.' (now '.$ybeg.'), was '.$xlen.' lines, now '.$ylen.' lines</span>'; 37 } 38 } 39 40 public function _added($lines) 41 { 42 self::escapeHTML($lines); 43 44 return '<span class="newdiff"> '.implode('</span>'."\n".'<span class="newdiff"> ', $lines).'</span>'; 45 } 46 47 public function _context($lines) 48 { 49 self::escapeHTML($lines); 50 51 return "\n" . parent::_context($lines); 52 } 53 54 public function _deleted($lines) 55 { 56 self::escapeHTML($lines); 57 58 return '<span class="olddiff"> '.implode('</span>'."\n".'<span class="olddiff"> ', $lines).'</span>'; 59 } 60 61 public function _changed($orig, $final) 62 { 63 return $this->_deleted($orig)."\n".$this->_added($final); 64 } 65 66 public function render($diff) 67 { 68 return parent::render($this->diff); 69 } 70 71 protected static function escapeHTML(&$lines) 72 { 73 array_walk($lines, function(&$a, $b) { 74 $a = htmlspecialchars($a); 75 }); 76 } 77} 78
