MediaWiki 1.30.2

[autoinstallsdev/mediawiki.git] / includes / diff / UnifiedDiffFormatter.php

diff --git a/includes/diff/UnifiedDiffFormatter.php b/includes/diff/UnifiedDiffFormatter.php
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+++ b/includes/diff/UnifiedDiffFormatter.php
@@ -0,0 +1,84 @@
+<?php
+/**
+ * Portions taken from phpwiki-1.3.3.
+ *
+ * Copyright © 2000, 2001 Geoffrey T. Dairiki <dairiki@dairiki.org>
+ * You may copy this code freely under the conditions of the GPL.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup DifferenceEngine
+ */
+
+/**
+ * A formatter that outputs unified diffs
+ * @ingroup DifferenceEngine
+ */
+class UnifiedDiffFormatter extends DiffFormatter {
+
+       /** @var int */
+       protected $leadingContextLines = 2;
+
+       /** @var int */
+       protected $trailingContextLines = 2;
+
+       /**
+        * @param string[] $lines
+        * @param string $prefix
+        */
+       protected function lines( $lines, $prefix = ' ' ) {
+               foreach ( $lines as $line ) {
+                       $this->writeOutput( "{$prefix}{$line}\n" );
+               }
+       }
+
+       /**
+        * @param string[] $lines
+        */
+       protected function added( $lines ) {
+               $this->lines( $lines, '+' );
+       }
+
+       /**
+        * @param string[] $lines
+        */
+       protected function deleted( $lines ) {
+               $this->lines( $lines, '-' );
+       }
+
+       /**
+        * @param string[] $orig
+        * @param string[] $closing
+        */
+       protected function changed( $orig, $closing ) {
+               $this->deleted( $orig );
+               $this->added( $closing );
+       }
+
+       /**
+        * @param int $xbeg
+        * @param int $xlen
+        * @param int $ybeg
+        * @param int $ylen
+        *
+        * @return string
+        */
+       protected function blockHeader( $xbeg, $xlen, $ybeg, $ylen ) {
+               return "@@ -$xbeg,$xlen +$ybeg,$ylen @@";
+       }
+
+}