summaryrefslogtreecommitdiff
path: root/includes/diff/UnifiedDiffFormatter.php
blob: 32a76055ee4a7a4f356660b93a0239037bb10f01 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
<?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
	 */
	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 @@";
	}

}