ConsoleDiff::firstDifference() - Code Metrics - Inspection of "Pre format" - graze/console-diff-renderer - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#9)

by Harry

created 2017-06-23 15:52 UTC

ConsoleDiff::firstDifference() C

↳ Parent: ConsoleDiff

Complexity

Conditions	12
Paths	10

Size

Total Lines	33
Code Lines	20

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	33
rs	5.1612
c	0
b	0
f	0
cc	12
eloc	20
nc	10
nop	2

How to fix Complexity

<?php
/**
 * This file is part of graze/console-diff-renderer.
 *
 * Copyright (c) 2017 Nature Delivered Ltd. <https://www.graze.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @license https://github.com/graze/console-diff-renderer/blob/master/LICENSE.md
 * @link    https://github.com/graze/console-diff-renderer
 */

namespace Graze\DiffRenderer\Diff;

use Graze\DiffRenderer\Terminal\ANSI;
use Graze\DiffRenderer\Terminal\CursorInterface;

class ConsoleDiff extends FirstDiff
{
    const REPLACEMENT_CHAR = "\6";

    /** @var CursorInterface */
    private $cursor;
    /** @var string */
    private $regex;

    /**
     * ConsoleDiff constructor.
     *
     * @param CursorInterface|null $cursor The cursor used to move around the screen
     */
    public function __construct(CursorInterface $cursor = null)
    {
        $this->cursor = $cursor ?: new ANSI();

        if ($this->cursor instanceof ANSI) {
            $this->regex = "/\e\\[(?:[1-9][0-9;]*)m.+?\e\\[(?:0|29|39|49)m/i";
        }
    }

    /**
     * Loop through each line, and produce a difference report of what to write out to the terminal
     *
     * Assumes the beginning of old and new are the same line
     *
     * @param string[] $old
     * @param string[] $new
     *
     * @return array [[:col, :str]]
     */
    public function lines(array $old, array $new)
    {
        $diff = parent::lines($old, $new);

        $len = count($new);
        for ($i = 0; $i < $len; $i++) {
            if (isset($diff[$i]) && !is_null($new[$i]) && $diff[$i]['col'] > 0) {
                $styling = $this->cursor->getCurrentFormatting(mb_substr($new[$i], 0, $diff[$i]['col']));
                $diff[$i]['col'] = mb_strlen($this->cursor->filter(mb_substr($new[$i], 0, $diff[$i]['col'])));
                if (mb_strlen($styling) > 0) {
                    $diff[$i]['str'] = $styling . $diff[$i]['str'];
                }
            }
        }

        return $diff;
    }

    /**
     * Looks through a line to find the character to of the first difference between the 2 strings.
     *
     * If no difference is found, returns -1
     *
     * @param string $old
     * @param string $new
     *
     * @return int
     */
    public function firstDifference($old, $new)
    {
        // loop through old and new character by character and compare
        $oldLen = mb_strlen($old);
        $newLen = mb_strlen($new);

        if ($oldLen === 0) {
            return 0;
        }

        $oldStripped = $this->cursor->filter($old, static::REPLACEMENT_CHAR);
        $newStripped = $this->cursor->filter($new, static::REPLACEMENT_CHAR);
        $lastReal = 0;

        for ($i = 0; $i < $oldLen && $i < $newLen; $i++) {
            if (mb_substr($old, $i, 1) !== mb_substr($new, $i, 1)) {
                if (($i > 0)
                    && ((mb_substr($oldStripped, $i - 1, 1) === static::REPLACEMENT_CHAR)
                        || (mb_substr($newStripped, $i - 1, 1) === static::REPLACEMENT_CHAR)
                    )
                ) {
                    return $lastReal > 0 ? $lastReal + 1 : 0;
                }
                return $i;
            } elseif (mb_substr($oldStripped, $i, 1) !== static::REPLACEMENT_CHAR) {
                $lastReal = $i;
            }
        }
        if ($i < $oldLen || $i < $newLen) {
            return $i;
        }
        return -1;
    }
}


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			use Graze\DiffRenderer\Terminal\ANSI;
17			use Graze\DiffRenderer\Terminal\CursorInterface;
18
19			class ConsoleDiff extends FirstDiff
20			{
21			const REPLACEMENT_CHAR = "\6";
22
23			/** @var CursorInterface */
24			private $cursor;
25			/** @var string */
26			private $regex;
27
28			/**
29			* ConsoleDiff constructor.
30			*
31			* @param CursorInterface\|null $cursor The cursor used to move around the screen
32			*/
33			public function __construct(CursorInterface $cursor = null)
34			{
35			$this->cursor = $cursor ?: new ANSI();
36
37			if ($this->cursor instanceof ANSI) {
38			$this->regex = "/\e\\[(?:[1-9][0-9;]*)m.+?\e\\[(?:0\|29\|39\|49)m/i";
39			}
40			}
41
42			/**
43			* Loop through each line, and produce a difference report of what to write out to the terminal
44			*
45			* Assumes the beginning of old and new are the same line
46			*
47			* @param string[] $old
48			* @param string[] $new
49			*
50			* @return array [[:col, :str]]
51			*/
52			public function lines(array $old, array $new)
53			{
54			$diff = parent::lines($old, $new);
55
56			$len = count($new);
57			for ($i = 0; $i < $len; $i++) {
58			if (isset($diff[$i]) && !is_null($new[$i]) && $diff[$i]['col'] > 0) {
59			$styling = $this->cursor->getCurrentFormatting(mb_substr($new[$i], 0, $diff[$i]['col']));
60			$diff[$i]['col'] = mb_strlen($this->cursor->filter(mb_substr($new[$i], 0, $diff[$i]['col'])));
61			if (mb_strlen($styling) > 0) {
62			$diff[$i]['str'] = $styling . $diff[$i]['str'];
63			}
64			}
65			}
66
67			return $diff;
68			}
69
70			/**
71			* Looks through a line to find the character to of the first difference between the 2 strings.
72			*
73			* If no difference is found, returns -1
74			*
75			* @param string $old
76			* @param string $new
77			*
78			* @return int
79			*/
80			public function firstDifference($old, $new)
81			{
82			// loop through old and new character by character and compare
83			$oldLen = mb_strlen($old);
84			$newLen = mb_strlen($new);
85
86			if ($oldLen === 0) {
87			return 0;
88			}
89
90			$oldStripped = $this->cursor->filter($old, static::REPLACEMENT_CHAR);
91			$newStripped = $this->cursor->filter($new, static::REPLACEMENT_CHAR);
92			$lastReal = 0;
93
94			for ($i = 0; $i < $oldLen && $i < $newLen; $i++) {
95			if (mb_substr($old, $i, 1) !== mb_substr($new, $i, 1)) {
96			if (($i > 0)
97			&& ((mb_substr($oldStripped, $i - 1, 1) === static::REPLACEMENT_CHAR)
98			\|\| (mb_substr($newStripped, $i - 1, 1) === static::REPLACEMENT_CHAR)
99			)
100			) {
101			return $lastReal > 0 ? $lastReal + 1 : 0;
102			}
103			return $i;
104			} elseif (mb_substr($oldStripped, $i, 1) !== static::REPLACEMENT_CHAR) {
105			$lastReal = $i;
106			}
107			}
108			if ($i < $oldLen \|\| $i < $newLen) {
109			return $i;
110			}
111			return -1;
112			}
113			}
114

graze / console-diff-renderer

Pull Request — master (#9)

ConsoleDiff::firstDifference() C

Complexity

Size

Duplication

Importance

How to fix Complexity

Long Method

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