|
1
|
|
|
<?php |
|
2
|
|
|
/** |
|
3
|
|
|
* This file is part of graze/console-diff-renderer. |
|
4
|
|
|
* |
|
5
|
|
|
* Copyright (c) 2017 Nature Delivered Ltd. <https://www.graze.com> |
|
6
|
|
|
* |
|
7
|
|
|
* For the full copyright and license information, please view the LICENSE |
|
8
|
|
|
* file that was distributed with this source code. |
|
9
|
|
|
* |
|
10
|
|
|
* @license https://github.com/graze/console-diff-renderer/blob/master/LICENSE.md |
|
11
|
|
|
* @link https://github.com/graze/console-diff-renderer |
|
12
|
|
|
*/ |
|
13
|
|
|
|
|
14
|
|
|
namespace Graze\DiffRenderer\Diff; |
|
15
|
|
|
|
|
16
|
|
|
class FirstDiff |
|
17
|
|
|
{ |
|
18
|
|
|
/** |
|
19
|
|
|
* Loop through each line, and produce a difference report of what to write out to the terminal |
|
20
|
|
|
* |
|
21
|
|
|
* Assumes the beginning of old and new are the same line |
|
22
|
|
|
* |
|
23
|
|
|
* @param string[] $old |
|
24
|
|
|
* @param string[] $new |
|
25
|
|
|
* |
|
26
|
|
|
* @return array [[:col, :str]] |
|
27
|
|
|
*/ |
|
28
|
17 |
|
public function lines(array $old, array $new) |
|
29
|
|
|
{ |
|
30
|
17 |
|
$out = []; |
|
31
|
17 |
|
$newLen = count($new); |
|
32
|
17 |
|
$oldLen = count($old); |
|
33
|
17 |
|
for ($i = 0; $i < $oldLen || $i < $newLen; $i++) { |
|
34
|
17 |
|
if ($i >= $oldLen) { |
|
35
|
2 |
|
$out[] = ['col' => 0, 'str' => $new[$i]]; // write out the entire line for extra lines |
|
36
|
17 |
|
} elseif ($i >= $newLen) { |
|
37
|
1 |
|
$out[] = ['col' => 0, 'str' => '']; // clear the line if the new array has less entries than the old one |
|
38
|
1 |
|
} else { |
|
39
|
17 |
|
$col = $this->firstDifference($old[$i], $new[$i]); |
|
40
|
17 |
|
if ($col === -1) { |
|
41
|
8 |
|
$out[] = null; |
|
42
|
8 |
|
} else { |
|
43
|
15 |
|
$out[] = ['col' => $col, 'str' => mb_substr($new[$i], $col)]; |
|
44
|
|
|
} |
|
45
|
|
|
} |
|
46
|
17 |
|
} |
|
47
|
17 |
|
return $out; |
|
48
|
|
|
} |
|
49
|
|
|
|
|
50
|
|
|
/** |
|
51
|
|
|
* Looks through a line to find the character to of the first difference between the 2 strings. |
|
52
|
|
|
* |
|
53
|
|
|
* If no difference is found, returns -1 |
|
54
|
|
|
* |
|
55
|
|
|
* @param string $old |
|
56
|
|
|
* @param string $new |
|
57
|
|
|
* |
|
58
|
|
|
* @return int |
|
59
|
|
|
*/ |
|
60
|
10 |
|
public function firstDifference($old, $new) |
|
61
|
|
|
{ |
|
62
|
|
|
// loop through old and new character by character and compare |
|
63
|
10 |
|
$oldLen = mb_strlen($old); |
|
64
|
10 |
|
$newLen = mb_strlen($new); |
|
65
|
|
|
|
|
66
|
10 |
|
if ($oldLen === 0) { |
|
67
|
1 |
|
return 0; |
|
68
|
|
|
} |
|
69
|
|
|
|
|
70
|
9 |
|
for ($i = 0; $i < $oldLen && $i < $newLen; $i++) { |
|
71
|
8 |
|
if (mb_substr($old, $i, 1) !== mb_substr($new, $i, 1)) { |
|
72
|
4 |
|
return $i; |
|
73
|
|
|
} |
|
74
|
7 |
|
} |
|
75
|
6 |
|
if ($i < $oldLen || $i < $newLen) { |
|
76
|
3 |
|
return $i; |
|
77
|
|
|
} |
|
78
|
3 |
|
return -1; |
|
79
|
|
|
} |
|
80
|
|
|
} |
|
81
|
|
|
|
graze /
console-diff-renderer
