Node::__clone() - Code Metrics - Inspection of "WIP: Basic implementation of commonmark’s AST & En..." - unicorn-fail/emoji - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — latest (#3)

by Mark

created 2020-09-21 01:28 UTC

Node::__clone() A

↳ Parent: Node

Complexity

Conditions	2
Paths	2

Size

Total Lines	13
Code Lines	7

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
eloc	7
c	1
b	0
f	0
dl	0
loc	13
rs	10
cc	2
nc	2
nop	0

<?php

declare(strict_types=1);

/*
 * This file was originally part of the league/commonmark package.
 *
 * (c) Colin O'Dell <[email protected]>
 *
 * Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js)
 *  - (c) John MacFarlane
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace UnicornFail\Emoji\Node;

abstract class Node
{
    /**
     * @var int
     *
     * @psalm-readonly-allow-private-mutation
     */
    protected $depth = 0;

    /**
     * @var Node|null
     *
     * @psalm-readonly-allow-private-mutation
     */
    protected $parent;

    /**
     * @var Node|null
     *
     * @psalm-readonly-allow-private-mutation
     */
    protected $previous;

    /**
     * @var Node|null
     *
     * @psalm-readonly-allow-private-mutation
     */
    protected $next;

    /**
     * @var Node|null
     *
     * @psalm-readonly-allow-private-mutation
     */
    protected $firstChild;

    /**
     * @var Node|null
     *
     * @psalm-readonly-allow-private-mutation
     */
    protected $lastChild;

    public function previous(): ?Node
    {
        return $this->previous;
    }

    public function next(): ?Node
    {
        return $this->next;
    }

    public function parent(): ?Node
    {
        return $this->parent;
    }

    protected function setParent(?Node $node = null): void
    {
        $this->parent = $node;
        $this->depth  = $node === null
            ? 0
            : $node->depth + 1;
    }

    /**
     * Inserts the $sibling node after $this
     */
    public function insertAfter(Node $sibling): void
    {
        $sibling->detach();
        $sibling->next = $this->next;

        if ($sibling->next) {
            $sibling->next->previous = $sibling;
        }

        $sibling->previous = $this;
        $this->next        = $sibling;
        $sibling->setParent($this->parent);

        if (! $sibling->next && $sibling->parent) {
            $sibling->parent->lastChild = $sibling;
        }
    }

    /**
     * Inserts the $sibling node before $this
     */
    public function insertBefore(Node $sibling): void
    {
        $sibling->detach();
        $sibling->previous = $this->previous;

        if ($sibling->previous) {
            $sibling->previous->next = $sibling;
        }

        $sibling->next  = $this;
        $this->previous = $sibling;
        $sibling->setParent($this->parent);

        if (! $sibling->previous && $sibling->parent) {
            $sibling->parent->firstChild = $sibling;
        }
    }

    public function replaceWith(Node $replacement): void
    {
        $replacement->detach();
        $this->insertAfter($replacement);
        $this->detach();
    }

    public function detach(): void
    {
        if ($this->previous) {
            $this->previous->next = $this->next;
        } elseif ($this->parent) {
            $this->parent->firstChild = $this->next;
        }

        if ($this->next) {
            $this->next->previous = $this->previous;
        } elseif ($this->parent) {
            $this->parent->lastChild = $this->previous;
        }

        $this->parent   = null;
        $this->next     = null;
        $this->previous = null;
        $this->depth    = 0;
    }

    public function hasChildren(): bool
    {
        return $this->firstChild !== null;
    }

    public function firstChild(): ?Node
    {
        return $this->firstChild;
    }

    public function lastChild(): ?Node
    {
        return $this->lastChild;
    }

    /**
     * @return Node[]
     */
    public function children(): iterable
    {
        $children = [];
        for ($current = $this->firstChild; $current !== null; $current = $current->next) {
            $children[] = $current;
        }

        return $children;
    }

    public function appendChild(Node $child): void
    {
        if ($this->lastChild) {
            $this->lastChild->insertAfter($child);
        } else {
            $child->detach();
            $child->setParent($this);
            $this->lastChild = $this->firstChild = $child;
        }
    }

    /**
     * Adds $child as the very first child of $this
     */
    public function prependChild(Node $child): void
    {
        if ($this->firstChild) {
            $this->firstChild->insertBefore($child);
        } else {
            $child->detach();
            $child->setParent($this);
            $this->lastChild = $this->firstChild = $child;
        }
    }

    /**
     * Detaches all child nodes of given node
     */
    public function detachChildren(): void
    {
        foreach ($this->children() as $children) {
            $children->setParent(null);
        }

        $this->firstChild = $this->lastChild = null;
    }

    /**
     * Replace all children of given node with collection of another
     *
     * @param iterable<Node> $children
     */
    public function replaceChildren(iterable $children): void
    {
        $this->detachChildren();
        foreach ($children as $item) {
            $this->appendChild($item);
        }
    }

    public function getDepth(): int
    {
        return $this->depth;
    }

    public function walker(): NodeWalker
    {
        return new NodeWalker($this);
    }

    /**
     * Clone the current node and its children
     *
     * WARNING: This is a recursive function and should not be called on deeply-nested node trees!
     */
    public function __clone()
    {
        // Cloned nodes are detached from their parents, siblings, and children
        $this->parent   = null;
        $this->previous = null;
        $this->next     = null;
        // But save a copy of the children since we'll need that in a moment
        $children = $this->children();
        $this->detachChildren();

        // The original children get cloned and re-added
        foreach ($children as $child) {
            $this->appendChild(clone $child);
        }
    }
}


1			<?php
2
3			declare(strict_types=1);
4
5			/*
6			* This file was originally part of the league/commonmark package.
7			*
8			* (c) Colin O'Dell <[email protected]>
9			*
10			* Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js)
11			* - (c) John MacFarlane
12			*
13			* For the full copyright and license information, please view the LICENSE
14			* file that was distributed with this source code.
15			*/
16
17			namespace UnicornFail\Emoji\Node;
18
19			abstract class Node
20			{
21			/**
22			* @var int
23			*
24			* @psalm-readonly-allow-private-mutation
25			*/
26			protected $depth = 0;
27
28			/**
29			* @var Node\|null
30			*
31			* @psalm-readonly-allow-private-mutation
32			*/
33			protected $parent;
34
35			/**
36			* @var Node\|null
37			*
38			* @psalm-readonly-allow-private-mutation
39			*/
40			protected $previous;
41
42			/**
43			* @var Node\|null
44			*
45			* @psalm-readonly-allow-private-mutation
46			*/
47			protected $next;
48
49			/**
50			* @var Node\|null
51			*
52			* @psalm-readonly-allow-private-mutation
53			*/
54			protected $firstChild;
55
56			/**
57			* @var Node\|null
58			*
59			* @psalm-readonly-allow-private-mutation
60			*/
61			protected $lastChild;
62
63			public function previous(): ?Node
64			{
65			return $this->previous;
66			}
67
68			public function next(): ?Node
69			{
70			return $this->next;
71			}
72
73			public function parent(): ?Node
74			{
75			return $this->parent;
76			}
77
78			protected function setParent(?Node $node = null): void
79			{
80			$this->parent = $node;
81			$this->depth = $node === null
82			? 0
83			: $node->depth + 1;
84			}
85
86			/**
87			* Inserts the $sibling node after $this
88			*/
89			public function insertAfter(Node $sibling): void
90			{
91			$sibling->detach();
92			$sibling->next = $this->next;
93
94			if ($sibling->next) {
95			$sibling->next->previous = $sibling;
96			}
97
98			$sibling->previous = $this;
99			$this->next = $sibling;
100			$sibling->setParent($this->parent);
101
102			if (! $sibling->next && $sibling->parent) {
103			$sibling->parent->lastChild = $sibling;
104			}
105			}
106
107			/**
108			* Inserts the $sibling node before $this
109			*/
110			public function insertBefore(Node $sibling): void
111			{
112			$sibling->detach();
113			$sibling->previous = $this->previous;
114
115			if ($sibling->previous) {
116			$sibling->previous->next = $sibling;
117			}
118
119			$sibling->next = $this;
120			$this->previous = $sibling;
121			$sibling->setParent($this->parent);
122
123			if (! $sibling->previous && $sibling->parent) {
124			$sibling->parent->firstChild = $sibling;
125			}
126			}
127
128			public function replaceWith(Node $replacement): void
129			{
130			$replacement->detach();
131			$this->insertAfter($replacement);
132			$this->detach();
133			}
134
135			public function detach(): void
136			{
137			if ($this->previous) {
138			$this->previous->next = $this->next;
139			} elseif ($this->parent) {
140			$this->parent->firstChild = $this->next;
141			}
142
143			if ($this->next) {
144			$this->next->previous = $this->previous;
145			} elseif ($this->parent) {
146			$this->parent->lastChild = $this->previous;
147			}
148
149			$this->parent = null;
150			$this->next = null;
151			$this->previous = null;
152			$this->depth = 0;
153			}
154
155			public function hasChildren(): bool
156			{
157			return $this->firstChild !== null;
158			}
159
160			public function firstChild(): ?Node
161			{
162			return $this->firstChild;
163			}
164
165			public function lastChild(): ?Node
166			{
167			return $this->lastChild;
168			}
169
170			/**
171			* @return Node[]
172			*/
173			public function children(): iterable
174			{
175			$children = [];
176			for ($current = $this->firstChild; $current !== null; $current = $current->next) {
177			$children[] = $current;
178			}
179
180			return $children;
181			}
182
183			public function appendChild(Node $child): void
184			{
185			if ($this->lastChild) {
186			$this->lastChild->insertAfter($child);
187			} else {
188			$child->detach();
189			$child->setParent($this);
190			$this->lastChild = $this->firstChild = $child;
191			}
192			}
193
194			/**
195			* Adds $child as the very first child of $this
196			*/
197			public function prependChild(Node $child): void
198			{
199			if ($this->firstChild) {
200			$this->firstChild->insertBefore($child);
201			} else {
202			$child->detach();
203			$child->setParent($this);
204			$this->lastChild = $this->firstChild = $child;
205			}
206			}
207
208			/**
209			* Detaches all child nodes of given node
210			*/
211			public function detachChildren(): void
212			{
213			foreach ($this->children() as $children) {
214			$children->setParent(null);
215			}
216
217			$this->firstChild = $this->lastChild = null;
218			}
219
220			/**
221			* Replace all children of given node with collection of another
222			*
223			* @param iterable<Node> $children
224			*/
225			public function replaceChildren(iterable $children): void
226			{
227			$this->detachChildren();
228			foreach ($children as $item) {
229			$this->appendChild($item);
230			}
231			}
232
233			public function getDepth(): int
234			{
235			return $this->depth;
236			}
237
238			public function walker(): NodeWalker
239			{
240			return new NodeWalker($this);
241			}
242
243			/**
244			* Clone the current node and its children
245			*
246			* WARNING: This is a recursive function and should not be called on deeply-nested node trees!
247			*/
248			public function __clone()
249			{
250			// Cloned nodes are detached from their parents, siblings, and children
251			$this->parent = null;
252			$this->previous = null;
253			$this->next = null;
254			// But save a copy of the children since we'll need that in a moment
255			$children = $this->children();
256			$this->detachChildren();
257
258			// The original children get cloned and re-added
259			foreach ($children as $child) {
260			$this->appendChild(clone $child);
261			}
262			}
263			}
264

unicorn-fail / emoji

Pull Request — latest (#3)

Node::__clone() A

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