Documentation TYPO3 par Ameos

class.t3lib_diff.php

00001 <?php
00002 /***************************************************************
00003 *  Copyright notice
00004 *
00005 *  (c) 1999-2004 Kasper Skaarhoj (kasperYYYY@typo3.com)
00006 *  All rights reserved
00007 *
00008 *  This script is part of the TYPO3 project. The TYPO3 project is
00009 *  free software; you can redistribute it and/or modify
00010 *  it under the terms of the GNU General Public License as published by
00011 *  the Free Software Foundation; either version 2 of the License, or
00012 *  (at your option) any later version.
00013 *
00014 *  The GNU General Public License can be found at
00015 *  http://www.gnu.org/copyleft/gpl.html.
00016 *  A copy is found in the textfile GPL.txt and important notices to the license
00017 *  from the author is found in LICENSE.txt distributed with these scripts.
00018 *
00019 *
00020 *  This script is distributed in the hope that it will be useful,
00021 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00022 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00023 *  GNU General Public License for more details.
00024 *
00025 *  This copyright notice MUST APPEAR in all copies of the script!
00026 ***************************************************************/
00067 class t3lib_diff {
00068 
00069                 // External, static:
00070         var $stripTags = 0;                     // If set, the HTML tags are stripped from the input strings first.
00071         var $diffOptions = '';          // Diff options. eg "--unified=3"
00072 
00073                 // Internal, dynamic:
00074         var $clearBufferIdx=0;          // This indicates the number of times the function addClearBuffer has been called - and used to detect the very first call...
00075 
00076 
00077 
00078 
00086         function makeDiffDisplay($str1,$str2)   {
00087                 if ($this->stripTags)   {
00088                         $str1 = strip_tags($str1);
00089                         $str2 = strip_tags($str2);
00090                 } else {
00091                         $str1 = $this->tagSpace($str1);
00092                         $str2 = $this->tagSpace($str2);
00093                 }
00094                 $str1Lines = $this->explodeStringIntoWords($str1);
00095                 $str2Lines = $this->explodeStringIntoWords($str2);
00096 
00097                 $diffRes = $this->getDiff(implode(chr(10),$str1Lines).chr(10),implode(chr(10),$str2Lines).chr(10));
00098 
00099                 if (is_array($diffRes)) {
00100                         reset($diffRes);
00101                         $c=0;
00102                         $diffResArray=array();
00103                         while(list(,$lValue)=each($diffRes))    {
00104                                 if (intval($lValue))    {
00105                                         $c=intval($lValue);
00106                                         $diffResArray[$c]['changeInfo']=$lValue;
00107                                 }
00108                                 if (substr($lValue,0,1)=='<')   {
00109                                         $diffResArray[$c]['old'][]=substr($lValue,2);
00110                                 }
00111                                 if (substr($lValue,0,1)=='>')   {
00112                                         $diffResArray[$c]['new'][]=substr($lValue,2);
00113                                 }
00114                         }
00115 
00116                         $outString='';
00117                         $clearBuffer='';
00118                         for ($a=-1;$a<count($str1Lines);$a++)   {
00119                                 if (is_array($diffResArray[$a+1]))      {
00120                                         if (strstr($diffResArray[$a+1]['changeInfo'],'a'))      {       // a=Add, c=change, d=delete: If a, then the content is Added after the entry and we must insert the line content as well.
00121                                                 $clearBuffer.=htmlspecialchars($str1Lines[$a]).' ';
00122                                         }
00123 
00124                                         $outString.=$this->addClearBuffer($clearBuffer);
00125                                         $clearBuffer='';
00126                                         if (is_array($diffResArray[$a+1]['old']))       {
00127                                                 $outString.='<span class="diff-r">'.htmlspecialchars(implode(' ',$diffResArray[$a+1]['old'])).'</span> ';
00128                                         }
00129                                         if (is_array($diffResArray[$a+1]['new']))       {
00130                                                 $outString.='<span class="diff-g">'.htmlspecialchars(implode(' ',$diffResArray[$a+1]['new'])).'</span> ';
00131                                         }
00132                                         $chInfParts = explode(',',$diffResArray[$a+1]['changeInfo']);
00133                                         if (!strcmp($chInfParts[0],$a+1))       {
00134                                                 $newLine = intval($chInfParts[1])-1;
00135                                                 if ($newLine>$a)        $a=$newLine;    // Security that $a is not set lower than current for some reason...
00136                                         }
00137                                 } else {
00138                                         $clearBuffer.=htmlspecialchars($str1Lines[$a]).' ';
00139                                 }
00140                         }
00141                         $outString.=$this->addClearBuffer($clearBuffer,1);
00142 
00143                         $outString = str_replace('  ',chr(10),$outString);
00144                         if (!$this->stripTags)  {
00145                                 $outString = $this->tagSpace($outString,1);
00146                         }
00147                         return $outString;
00148                 }
00149         }
00150 
00160         function getDiff($str1,$str2)   {
00161                 if (TYPO3_OS!='WIN')    {
00162                                 // Create file 1 and write string
00163                         $file1 = t3lib_div::tempnam('diff1_');
00164                         t3lib_div::writeFile($file1,$str1);
00165                                 // Create file 2 and write string
00166                         $file2 = t3lib_div::tempnam('diff2_');
00167                         t3lib_div::writeFile($file2,$str2);
00168                                 // Perform diff.
00169                         $cmd = $GLOBALS['TYPO3_CONF_VARS']['BE']['diff_path'].' '.$this->diffOptions.' '.$file1.' '.$file2;
00170                         exec($cmd,$res);
00171 
00172                         unlink($file1);
00173                         unlink($file2);
00174 
00175                         return $res;
00176                 }
00177         }
00178 
00187         function addClearBuffer($clearBuffer,$last=0)   {
00188                 if (strlen($clearBuffer)>200)   {
00189                         $clearBuffer=($this->clearBufferIdx?t3lib_div::fixed_lgd_cs($clearBuffer,70):'').'['.strlen($clearBuffer).']'.(!$last?t3lib_div::fixed_lgd_cs($clearBuffer,-70):'');
00190                 }
00191                 $this->clearBufferIdx++;
00192                 return $clearBuffer;
00193         }
00194 
00203         function explodeStringIntoWords($str)   {
00204                 $strArr = t3lib_div::trimExplode(chr(10),$str);
00205                 $outArray=array();
00206                 reset($strArr);
00207                 while(list(,$lineOfWords)=each($strArr))        {
00208                         $allWords = t3lib_div::trimExplode(' ',$lineOfWords,1);
00209                         $outArray = array_merge($outArray,$allWords);
00210                         $outArray[]='';
00211                         $outArray[]='';
00212                 }
00213                 return $outArray;
00214         }
00215 
00224         function tagSpace($str,$rev=0)  {
00225                 if ($rev)       {
00226                         return str_replace(' &lt;','&lt;',str_replace('&gt; ','&gt;',$str));
00227                 } else {
00228                         return str_replace('<',' <',str_replace('>','> ',$str));
00229                 }
00230         }
00231 }
00232 
00233 if (defined('TYPO3_MODE') && $TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['t3lib/class.t3lib_diff.php'])      {
00234         include_once($TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['t3lib/class.t3lib_diff.php']);
00235 }
00236 ?>


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