ListItemParser - Code Metrics - Inspection of "Refactor the parser implementation" - thephpleague/commonmark - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( b4ff9c...fbe6de )

by Colin

created 2020-05-03 14:20 UTC

ListItemParser A

↳ Parent: Project

Complexity

Total Complexity

Size/Duplication

Total Lines	68
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	7

Test Coverage

Coverage

100%

Importance

Changes

Metric	Value
wmc	11
lcom	1
cbo	7
dl	0
loc	68
ccs	26
cts	26
cp	1
rs	10
c	0
b	0
f	0

5 Methods

Rating	Name	Size	Complexity
A	__construct()	4	1
A	getBlock()	4	1
A	isContainer()	4	1
A	tryContinue()	25	5
A	canContain()	15	3

<?php

/*
 * This file is part of the league/commonmark package.
 *
 * (c) Colin O'Dell <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace League\CommonMark\Extension\CommonMark\Parser\Block;

use League\CommonMark\Extension\CommonMark\Node\Block\ListBlock;
use League\CommonMark\Extension\CommonMark\Node\Block\ListData;
use League\CommonMark\Extension\CommonMark\Node\Block\ListItem;
use League\CommonMark\Node\Block\AbstractBlock;
use League\CommonMark\Node\Block\Paragraph;
use League\CommonMark\Parser\Block\AbstractBlockContinueParser;
use League\CommonMark\Parser\Block\BlockContinue;
use League\CommonMark\Parser\Block\BlockContinueParserInterface;
use League\CommonMark\Parser\Cursor;

final class ListItemParser extends AbstractBlockContinueParser
{
    /** @var ListItem */
    private $block;

    /** @var bool */
    private $hadBlankLine = false;

    public function __construct(ListData $listData)
    {
        $this->block = new ListItem($listData);
    }

    /**
     * @return ListItem
     */
    public function getBlock(): AbstractBlock
    {
        return $this->block;
    }

    public function isContainer(): bool
    {
        return true;
    }

    public function canContain(AbstractBlock $childBlock): bool
    {
        if ($this->hadBlankLine) {
            // We saw a blank line in this list item, that means the list block is loose.
            //
            // spec: if any of its constituent list items directly contain two block-level elements with a blank line
            // between them
            $parent = $this->block->parent();
            if ($parent instanceof ListBlock) {
                $parent->setTight(false);
            }
        }

        return true;
    }

    public function tryContinue(Cursor $cursor, BlockContinueParserInterface $activeBlockParser): ?BlockContinue
    {
        if ($cursor->isBlank()) {
            if ($this->block->firstChild() === null) {
                // Blank line after empty list item
                return BlockContinue::none();
            }

            $activeBlock = $activeBlockParser->getBlock();
            // If the active block is a code block, blank lines in it should not affect if the list is tight.
            $this->hadBlankLine = $activeBlock instanceof Paragraph || $activeBlock instanceof ListItem;
            $cursor->advanceToNextNonSpaceOrTab();

            return BlockContinue::at($cursor);
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
        }

        $contentIndent = $this->block->getListData()->markerOffset + $this->getBlock()->getListData()->padding;
        if ($cursor->getIndent() >= $contentIndent) {
            $cursor->advanceBy($contentIndent, true);

            return BlockContinue::at($cursor);
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
        }

        return BlockContinue::none();
    }
}


1		<?php
2
3		/*
4		* This file is part of the league/commonmark package.
5		*
6		* (c) Colin O'Dell <[email protected]>
7		*
8		* For the full copyright and license information, please view the LICENSE
9		* file that was distributed with this source code.
10		*/
11
12		namespace League\CommonMark\Extension\CommonMark\Parser\Block;
13
14		use League\CommonMark\Extension\CommonMark\Node\Block\ListBlock;
15		use League\CommonMark\Extension\CommonMark\Node\Block\ListData;
16		use League\CommonMark\Extension\CommonMark\Node\Block\ListItem;
17		use League\CommonMark\Node\Block\AbstractBlock;
18		use League\CommonMark\Node\Block\Paragraph;
19		use League\CommonMark\Parser\Block\AbstractBlockContinueParser;
20		use League\CommonMark\Parser\Block\BlockContinue;
21		use League\CommonMark\Parser\Block\BlockContinueParserInterface;
22		use League\CommonMark\Parser\Cursor;
23
24		final class ListItemParser extends AbstractBlockContinueParser
25		{
26		/** @var ListItem */
27		private $block;
28
29		/** @var bool */
30		private $hadBlankLine = false;
31
32	282	public function __construct(ListData $listData)
33		{
34	282	$this->block = new ListItem($listData);
35	282	}
36
37		/**
38		* @return ListItem
39		*/
40	282	public function getBlock(): AbstractBlock
41		{
42	282	return $this->block;
43		}
44
45	264	public function isContainer(): bool
46		{
47	264	return true;
48		}
49
50	258	public function canContain(AbstractBlock $childBlock): bool
51		{
52	258	if ($this->hadBlankLine) {
53		// We saw a blank line in this list item, that means the list block is loose.
54		//
55		// spec: if any of its constituent list items directly contain two block-level elements with a blank line
56		// between them
57	84	$parent = $this->block->parent();
58	84	if ($parent instanceof ListBlock) {
59	84	$parent->setTight(false);
60		}
61		}
62
63	258	return true;
64		}
65
66	222	public function tryContinue(Cursor $cursor, BlockContinueParserInterface $activeBlockParser): ?BlockContinue
67		{
68	222	if ($cursor->isBlank()) {
69	129	if ($this->block->firstChild() === null) {
70		// Blank line after empty list item
71	6	return BlockContinue::none();
72		}
73
74	123	$activeBlock = $activeBlockParser->getBlock();
75		// If the active block is a code block, blank lines in it should not affect if the list is tight.
76	123	$this->hadBlankLine = $activeBlock instanceof Paragraph \|\| $activeBlock instanceof ListItem;
77	123	$cursor->advanceToNextNonSpaceOrTab();
78
79	123	return BlockContinue::at($cursor);
		0 ignored issues – show Bug Best Practice introduced 2020-05-03 01:47 UTC by Report Bug Copy Issue Report The return type of `return \League\CommonMar...kContinue::at($cursor);` (`self`) is incompatible with the return type declared by the interface `League\CommonMark\Parser...rInterface::tryContinue` of type `League\CommonMark\Parser\Block\BlockContinue\|null`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
80		}
81
82	219	$contentIndent = $this->block->getListData()->markerOffset + $this->getBlock()->getListData()->padding;
83	219	if ($cursor->getIndent() >= $contentIndent) {
84	126	$cursor->advanceBy($contentIndent, true);
85
86	126	return BlockContinue::at($cursor);
		0 ignored issues – show Bug Best Practice introduced 2020-05-03 01:47 UTC by Report Bug Copy Issue Report The return type of `return \League\CommonMar...kContinue::at($cursor);` (`self`) is incompatible with the return type declared by the interface `League\CommonMark\Parser...rInterface::tryContinue` of type `League\CommonMark\Parser\Block\BlockContinue\|null`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
87		}
88
89	138	return BlockContinue::none();
90		}
91		}
92

thephpleague / commonmark

Push — master ( b4ff9c...fbe6de )

ListItemParser A

Complexity

Size/Duplication

Coupling/Cohesion

Test Coverage

Importance

5 Methods

Duplication Side-by-Side

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