Code Coverage |
||||||||||
Lines |
Functions and Methods |
Classes and Traits |
||||||||
Total | |
3.45% |
1 / 29 |
|
14.29% |
1 / 7 |
CRAP | |
0.00% |
0 / 1 |
Diff | |
3.57% |
1 / 28 |
|
14.29% |
1 / 7 |
245.54 | |
0.00% |
0 / 1 |
__construct | |
0.00% |
0 / 3 |
|
0.00% |
0 / 1 |
2 | |||
getEdits | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
reverse | |
0.00% |
0 / 5 |
|
0.00% |
0 / 1 |
6 | |||
isEmpty | |
0.00% |
0 / 4 |
|
0.00% |
0 / 1 |
12 | |||
lcs | |
0.00% |
0 / 5 |
|
0.00% |
0 / 1 |
12 | |||
orig | |
0.00% |
0 / 5 |
|
0.00% |
0 / 1 |
12 | |||
closing | |
0.00% |
0 / 5 |
|
0.00% |
0 / 1 |
12 |
1 | <?php |
2 | /** |
3 | * A PHP diff engine for phpwiki. (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 | namespace Wikimedia\Diff; |
28 | |
29 | /** |
30 | * Class representing a 'diff' between two sequences of strings. |
31 | * @newable |
32 | * @ingroup DifferenceEngine |
33 | */ |
34 | class Diff { |
35 | |
36 | /** |
37 | * @var DiffOp[] |
38 | */ |
39 | public $edits; |
40 | |
41 | /** |
42 | * @var int If this diff complexity is exceeded, a ComplexityException is thrown |
43 | * 0 means no limit. |
44 | */ |
45 | protected $bailoutComplexity = 0; |
46 | |
47 | /** |
48 | * Computes diff between sequences of strings. |
49 | * |
50 | * @stable to call |
51 | * @todo Don't do work in the constructor, use a service to create diffs instead (T257472). |
52 | * |
53 | * @param string[] $from_lines An array of strings. |
54 | * Typically these are lines from a file. |
55 | * @param string[] $to_lines An array of strings. |
56 | * @throws ComplexityException |
57 | */ |
58 | public function __construct( $from_lines, $to_lines ) { |
59 | $eng = new DiffEngine; |
60 | $eng->setBailoutComplexity( $this->bailoutComplexity ); |
61 | $this->edits = $eng->diff( $from_lines, $to_lines ); |
62 | } |
63 | |
64 | /** |
65 | * @return DiffOp[] |
66 | */ |
67 | public function getEdits() { |
68 | return $this->edits; |
69 | } |
70 | |
71 | /** |
72 | * Compute reversed Diff. |
73 | * |
74 | * SYNOPSIS: |
75 | * |
76 | * $diff = new Diff($lines1, $lines2); |
77 | * $rev = $diff->reverse(); |
78 | * |
79 | * @return self A Diff object representing the inverse of the |
80 | * original diff. |
81 | */ |
82 | public function reverse() { |
83 | $rev = $this; |
84 | $rev->edits = []; |
85 | /** @var DiffOp $edit */ |
86 | foreach ( $this->edits as $edit ) { |
87 | $rev->edits[] = $edit->reverse(); |
88 | } |
89 | |
90 | return $rev; |
91 | } |
92 | |
93 | /** |
94 | * Check for empty diff. |
95 | * |
96 | * @return bool True if two sequences were identical. |
97 | */ |
98 | public function isEmpty() { |
99 | foreach ( $this->edits as $edit ) { |
100 | if ( $edit->type != 'copy' ) { |
101 | return false; |
102 | } |
103 | } |
104 | |
105 | return true; |
106 | } |
107 | |
108 | /** |
109 | * Compute the length of the Longest Common Subsequence (LCS). |
110 | * |
111 | * This is mostly for diagnostic purposed. |
112 | * |
113 | * @return int The length of the LCS. |
114 | */ |
115 | public function lcs() { |
116 | $lcs = 0; |
117 | foreach ( $this->edits as $edit ) { |
118 | if ( $edit->type == 'copy' ) { |
119 | $lcs += count( $edit->orig ); |
120 | } |
121 | } |
122 | |
123 | return $lcs; |
124 | } |
125 | |
126 | /** |
127 | * Get the original set of lines. |
128 | * |
129 | * This reconstructs the $from_lines parameter passed to the |
130 | * constructor. |
131 | * |
132 | * @return string[] The original sequence of strings. |
133 | */ |
134 | public function orig() { |
135 | $lines = []; |
136 | |
137 | foreach ( $this->edits as $edit ) { |
138 | if ( $edit->orig ) { |
139 | array_splice( $lines, count( $lines ), 0, $edit->orig ); |
140 | } |
141 | } |
142 | |
143 | return $lines; |
144 | } |
145 | |
146 | /** |
147 | * Get the closing set of lines. |
148 | * |
149 | * This reconstructs the $to_lines parameter passed to the |
150 | * constructor. |
151 | * |
152 | * @return string[] The sequence of strings. |
153 | */ |
154 | public function closing() { |
155 | $lines = []; |
156 | |
157 | foreach ( $this->edits as $edit ) { |
158 | if ( $edit->closing ) { |
159 | array_splice( $lines, count( $lines ), 0, $edit->closing ); |
160 | } |
161 | } |
162 | |
163 | return $lines; |
164 | } |
165 | } |
166 | |
167 | /** @deprecated class alias since 1.41 */ |
168 | class_alias( Diff::class, 'Diff' ); |