wp-reset / libs / diff / Renderer / Text / Context.php

Context.php in WP Reset 2.06, at libs/diff/Renderer/Text/Context.php

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1	<?php
2	/**
3	* Context diff generator for PHP DiffLib.
4	*
5	* PHP version 5
6	*
7	* Copyright (c) 2009 Chris Boulton <chris.boulton@interspire.com>
8	*
9	* All rights reserved.
10	*
11	* Redistribution and use in source and binary forms, with or without
12	* modification, are permitted provided that the following conditions are met:
13	*
14	* - Redistributions of source code must retain the above copyright notice,
15	* this list of conditions and the following disclaimer.
16	* - Redistributions in binary form must reproduce the above copyright notice,
17	* this list of conditions and the following disclaimer in the documentation
18	* and/or other materials provided with the distribution.
19	* - Neither the name of the Chris Boulton nor the names of its contributors
20	* may be used to endorse or promote products derived from this software
21	* without specific prior written permission.
22	*
23	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
24	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26	* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
27	* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33	* POSSIBILITY OF SUCH DAMAGE.
34	*
35	* @package DiffLib
36	* @author Chris Boulton <chris.boulton@interspire.com>
37	* @copyright (c) 2009 Chris Boulton
38	* @license New BSD License http://www.opensource.org/licenses/bsd-license.php
39	* @version 1.1
40	* @link http://github.com/chrisboulton/php-diff
41	*/
42
43	require_once dirname(__FILE__).'/../Abstract.php';
44
45	class WPR_Diff_Renderer_Text_Context extends WPR_Diff_Renderer_Abstract
46	{
47	/**
48	* @var array Array of the different opcode tags and how they map to the context diff equivalent.
49	*/
50	private $tagMap = array(
51	'insert' => '+',
52	'delete' => '-',
53	'replace' => '!',
54	'equal' => ' '
55	);
56
57	/**
58	* Render and return a context formatted (old school!) diff file.
59	*
60	* @return string The generated context diff.
61	*/
62	public function render()
63	{
64	$diff = '';
65	$opCodes = $this->diff->getGroupedOpcodes();
66	foreach($opCodes as $group) {
67	$diff .= "***************\n";
68	$lastItem = count($group)-1;
69	$i1 = $group[0][1];
70	$i2 = $group[$lastItem][2];
71	$j1 = $group[0][3];
72	$j2 = $group[$lastItem][4];
73
74	if($i2 - $i1 >= 2) {
75	$diff .= '* '.($group[0][1] + 1).','.$i2." **\n";
76	}
77	else {
78	$diff .= '* '.$i2." **\n";
79	}
80
81	if($j2 - $j1 >= 2) {
82	$separator = '--- '.($j1 + 1).','.$j2." ----\n";
83	}
84	else {
85	$separator = '--- '.$j2." ----\n";
86	}
87
88	$hasVisible = false;
89	foreach($group as $code) {
90	if($code[0] == 'replace' \|\| $code[0] == 'delete') {
91	$hasVisible = true;
92	break;
93	}
94	}
95
96	if($hasVisible) {
97	foreach($group as $code) {
98	list($tag, $i1, $i2, $j1, $j2) = $code;
99	if($tag == 'insert') {
100	continue;
101	}
102	$diff .= $this->tagMap[$tag].' '.implode("\n".$this->tagMap[$tag].' ', $this->diff->GetA($i1, $i2))."\n";
103	}
104	}
105
106	$hasVisible = false;
107	foreach($group as $code) {
108	if($code[0] == 'replace' \|\| $code[0] == 'insert') {
109	$hasVisible = true;
110	break;
111	}
112	}
113
114	$diff .= $separator;
115
116	if($hasVisible) {
117	foreach($group as $code) {
118	list($tag, $i1, $i2, $j1, $j2) = $code;
119	if($tag == 'delete') {
120	continue;
121	}
122	$diff .= $this->tagMap[$tag].' '.implode("\n".$this->tagMap[$tag].' ', $this->diff->GetB($j1, $j2))."\n";
123	}
124	}
125	}
126	return $diff;
127	}
128	}