includes/diff/UnifiedDiffFormatter.php

   1 <?php
   2 /**
   3  * Portions taken from phpwiki-1.3.3.
   4  *
   5  * Copyright © 2000, 2001 Geoffrey T. Dairiki <dairiki@dairiki.org>
   6  * You may copy this code freely under the conditions of the GPL.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21  * http://www.gnu.org/copyleft/gpl.html
  22  *
  23  * @file
  24  * @ingroup DifferenceEngine
  25  */
  26
  27 /**
  28  * A formatter that outputs unified diffs
  29  * @ingroup DifferenceEngine
  30  */
  31 class UnifiedDiffFormatter extends DiffFormatter {
  32
  33         /** @var int */
  34         protected $leadingContextLines = 2;
  35
  36         /** @var int */
  37         protected $trailingContextLines = 2;
  38
  39         /**
  40          * @param string[] $lines
  41          */
  42         protected function added( $lines ) {
  43                 $this->lines( $lines, '+' );
  44         }
  45
  46         /**
  47          * @param string[] $lines
  48          */
  49         protected function deleted( $lines ) {
  50                 $this->lines( $lines, '-' );
  51         }
  52
  53         /**
  54          * @param string[] $orig
  55          * @param string[] $closing
  56          */
  57         protected function changed( $orig, $closing ) {
  58                 $this->deleted( $orig );
  59                 $this->added( $closing );
  60         }
  61
  62         /**
  63          * @param int $xbeg
  64          * @param int $xlen
  65          * @param int $ybeg
  66          * @param int $ylen
  67          *
  68          * @return string
  69          */
  70         protected function blockHeader( $xbeg, $xlen, $ybeg, $ylen ) {
  71                 return "@@ -$xbeg,$xlen +$ybeg,$ylen @@";
  72         }
  73
  74 }