1: <?php
 2: /**
 3:  * "Unified" diff renderer.
 4:  *
 5:  * This class renders the diff in classic "unified diff" format.
 6:  *
 7:  * Copyright 2004-2012 Horde LLC (http://www.horde.org/)
 8:  *
 9:  * See the enclosed file COPYING for license information (LGPL). If you did
10:  * not receive this file, see http://www.horde.org/licenses/lgpl21.
11:  *
12:  * @author  Ciprian Popovici
13:  * @package Text_Diff
14:  */
15: class Horde_Text_Diff_Renderer_Unified extends Horde_Text_Diff_Renderer
16: {
17:     /**
18:      * Number of leading context "lines" to preserve.
19:      */
20:     protected $_leading_context_lines = 4;
21: 
22:     /**
23:      * Number of trailing context "lines" to preserve.
24:      */
25:     protected $_trailing_context_lines = 4;
26: 
27:     protected function _blockHeader($xbeg, $xlen, $ybeg, $ylen)
28:     {
29:         if ($xlen != 1) {
30:             $xbeg .= ',' . $xlen;
31:         }
32:         if ($ylen != 1) {
33:             $ybeg .= ',' . $ylen;
34:         }
35:         return "@@ -$xbeg +$ybeg @@";
36:     }
37: 
38:     protected function _context($lines)
39:     {
40:         return $this->_lines($lines, ' ');
41:     }
42: 
43:     protected function _added($lines)
44:     {
45:         return $this->_lines($lines, '+');
46:     }
47: 
48:     protected function _deleted($lines)
49:     {
50:         return $this->_lines($lines, '-');
51:     }
52: 
53:     protected function _changed($orig, $final)
54:     {
55:         return $this->_deleted($orig) . $this->_added($final);
56:     }
57: }
58: