ListBlockStartParser::parseList() - Code Metrics - thephpleague/commonmark - Measure and Improve Code Quality continuously with Scrutinizer

ListBlockStartParser::parseList() B
last analyzed 2025-06-12 21:27 UTC

↳ Parent: ListBlockStartParser

Complexity

Conditions	11
Paths	10

Size

Total Lines	43
Code Lines	30

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	30
CRAP Score	11

Importance

Changes

Metric	Value
eloc	30
dl	0
loc	43
ccs	30
cts	30
cp	1
rs	7.3166
c	0
b	0
f	0
cc	11
nc	10
nop	2
crap	11

How to fix Complexity

<?php

declare(strict_types=1);

/*
 * 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\Parser\Block\BlockStart;
use League\CommonMark\Parser\Block\BlockStartParserInterface;
use League\CommonMark\Parser\Cursor;
use League\CommonMark\Parser\MarkdownParserStateInterface;
use League\CommonMark\Util\RegexHelper;
use League\Config\ConfigurationAwareInterface;
use League\Config\ConfigurationInterface;

final class ListBlockStartParser implements BlockStartParserInterface, ConfigurationAwareInterface
{
    /** @psalm-readonly-allow-private-mutation */
    private ?ConfigurationInterface $config = null;

    /**
     * @psalm-var non-empty-string|null
     *
     * @psalm-readonly-allow-private-mutation
     */
    private ?string $listMarkerRegex = null;

    public function setConfiguration(ConfigurationInterface $configuration): void
    {
        $this->config = $configuration;
    }

    public function tryStart(Cursor $cursor, MarkdownParserStateInterface $parserState): ?BlockStart
    {
        if ($cursor->isIndented()) {
            return BlockStart::none();
        }

        $listData = $this->parseList($cursor, $parserState->getParagraphContent() !== null);
        if ($listData === null) {
            return BlockStart::none();
        }

        $listItemParser = new ListItemParser($listData);

        // prepend the list block if needed
        $matched = $parserState->getLastMatchedBlockParser();
        if (! ($matched instanceof ListBlockParser) || ! $listData->equals($matched->getBlock()->getListData())) {
            $listBlockParser = new ListBlockParser($listData);
            // We start out with assuming a list is tight. If we find a blank line, we set it to loose later.
            // TODO for 3.0: Just make them tight by default in the block so we can remove this call
            $listBlockParser->getBlock()->setTight(true);

            return BlockStart::of($listBlockParser, $listItemParser)->at($cursor);
        }

        return BlockStart::of($listItemParser)->at($cursor);
    }

    private function parseList(Cursor $cursor, bool $inParagraph): ?ListData
    {
        $indent = $cursor->getIndent();

        $tmpCursor = clone $cursor;
        $tmpCursor->advanceToNextNonSpaceOrTab();
        $rest = $tmpCursor->getRemainder();

        if (\preg_match($this->listMarkerRegex ?? $this->generateListMarkerRegex(), $rest) === 1) {
            $data               = new ListData();
            $data->markerOffset = $indent;
            $data->type         = ListBlock::TYPE_BULLET;
            $data->delimiter    = null;
            $data->bulletChar   = $rest[0];
            $markerLength       = 1;
        } elseif (($matches = RegexHelper::matchFirst('/^(\d{1,9})([.)])/', $rest)) && (! $inParagraph || $matches[1] === '1')) {
            $data               = new ListData();
            $data->markerOffset = $indent;
            $data->type         = ListBlock::TYPE_ORDERED;
            $data->start        = (int) $matches[1];
            $data->delimiter    = $matches[2] === '.' ? ListBlock::DELIM_PERIOD : ListBlock::DELIM_PAREN;
            $data->bulletChar   = null;
            $markerLength       = \strlen($matches[0]);
        } else {
            return null;
        }

        // Make sure we have spaces after
        $nextChar = $tmpCursor->peek($markerLength);
        if (! ($nextChar === null || $nextChar === "\t" || $nextChar === ' ')) {
            return null;
        }

        // If it interrupts paragraph, make sure first line isn't blank
        if ($inParagraph && ! RegexHelper::matchAt(RegexHelper::REGEX_NON_SPACE, $rest, $markerLength)) {
0   == false // true
0   == null  // true
123 == false // false
123 == null  // false

// It is often better to use strict comparison
0 === false // false
0 === null  // false
            return null;
        }

        $cursor->advanceToNextNonSpaceOrTab(); // to start of marker
        $cursor->advanceBy($markerLength, true); // to end of marker
        $data->padding = self::calculateListMarkerPadding($cursor, $markerLength);

        return $data;
    }

    private static function calculateListMarkerPadding(Cursor $cursor, int $markerLength): int
    {
        $start          = $cursor->saveState();
        $spacesStartCol = $cursor->getColumn();

        while ($cursor->getColumn() - $spacesStartCol < 5) {
            if (! $cursor->advanceBySpaceOrTab()) {
                break;
            }
        }

        $blankItem         = $cursor->peek() === null;
        $spacesAfterMarker = $cursor->getColumn() - $spacesStartCol;

        if ($spacesAfterMarker >= 5 || $spacesAfterMarker < 1 || $blankItem) {
            $cursor->restoreState($start);
            $cursor->advanceBySpaceOrTab();

            return $markerLength + 1;
        }

        return $markerLength + $spacesAfterMarker;
    }

    /**
     * @psalm-return non-empty-string
     */
    private function generateListMarkerRegex(): string
    {
        // No configuration given - use the defaults
        if ($this->config === null) {
            return $this->listMarkerRegex = '/^[*+-]/';
        }

        $markers = $this->config->get('commonmark/unordered_list_markers');
        \assert(\is_array($markers));

        return $this->listMarkerRegex = '/^[' . \preg_quote(\implode('', $markers), '/') . ']/';
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		/*
6		* This file is part of the league/commonmark package.
7		*
8		* (c) Colin O'Dell <[email protected]>
9		*
10		* For the full copyright and license information, please view the LICENSE
11		* file that was distributed with this source code.
12		*/
13
14		namespace League\CommonMark\Extension\CommonMark\Parser\Block;
15
16		use League\CommonMark\Extension\CommonMark\Node\Block\ListBlock;
17		use League\CommonMark\Extension\CommonMark\Node\Block\ListData;
18		use League\CommonMark\Parser\Block\BlockStart;
19		use League\CommonMark\Parser\Block\BlockStartParserInterface;
20		use League\CommonMark\Parser\Cursor;
21		use League\CommonMark\Parser\MarkdownParserStateInterface;
22		use League\CommonMark\Util\RegexHelper;
23		use League\Config\ConfigurationAwareInterface;
24		use League\Config\ConfigurationInterface;
25
26		final class ListBlockStartParser implements BlockStartParserInterface, ConfigurationAwareInterface
27		{
28		/** @psalm-readonly-allow-private-mutation */
29		private ?ConfigurationInterface $config = null;
30
31		/**
32		* @psalm-var non-empty-string\|null
33		*
34		* @psalm-readonly-allow-private-mutation
35		*/
36		private ?string $listMarkerRegex = null;
37
38	2332	public function setConfiguration(ConfigurationInterface $configuration): void
39		{
40	2332	$this->config = $configuration;
41		}
42
43	1346	public function tryStart(Cursor $cursor, MarkdownParserStateInterface $parserState): ?BlockStart
44		{
45	1346	if ($cursor->isIndented()) {
46	142	return BlockStart::none();
47		}
48
49	1260	$listData = $this->parseList($cursor, $parserState->getParagraphContent() !== null);
50	1258	if ($listData === null) {
51	1074	return BlockStart::none();
52		}
53
54	216	$listItemParser = new ListItemParser($listData);
55
56		// prepend the list block if needed
57	216	$matched = $parserState->getLastMatchedBlockParser();
58	216	if (! ($matched instanceof ListBlockParser) \|\| ! $listData->equals($matched->getBlock()->getListData())) {
59	216	$listBlockParser = new ListBlockParser($listData);
60		// We start out with assuming a list is tight. If we find a blank line, we set it to loose later.
61		// TODO for 3.0: Just make them tight by default in the block so we can remove this call
62	216	$listBlockParser->getBlock()->setTight(true);
63
64	216	return BlockStart::of($listBlockParser, $listItemParser)->at($cursor);
65		}
66
67	84	return BlockStart::of($listItemParser)->at($cursor);
68		}
69
70	1260	private function parseList(Cursor $cursor, bool $inParagraph): ?ListData
71		{
72	1260	$indent = $cursor->getIndent();
73
74	1260	$tmpCursor = clone $cursor;
75	1260	$tmpCursor->advanceToNextNonSpaceOrTab();
76	1260	$rest = $tmpCursor->getRemainder();
77
78	1260	if (\preg_match($this->listMarkerRegex ?? $this->generateListMarkerRegex(), $rest) === 1) {
79	398	$data = new ListData();
80	398	$data->markerOffset = $indent;
81	398	$data->type = ListBlock::TYPE_BULLET;
82	398	$data->delimiter = null;
83	398	$data->bulletChar = $rest[0];
84	398	$markerLength = 1;
85	926	} elseif (($matches = RegexHelper::matchFirst('/^(\d{1,9})([.)])/', $rest)) && (! $inParagraph \|\| $matches[1] === '1')) {
86	70	$data = new ListData();
87	70	$data->markerOffset = $indent;
88	70	$data->type = ListBlock::TYPE_ORDERED;
89	70	$data->start = (int) $matches[1];
90	70	$data->delimiter = $matches[2] === '.' ? ListBlock::DELIM_PERIOD : ListBlock::DELIM_PAREN;
91	70	$data->bulletChar = null;
92	70	$markerLength = \strlen($matches[0]);
93		} else {
94	862	return null;
95		}
96
97		// Make sure we have spaces after
98	448	$nextChar = $tmpCursor->peek($markerLength);
99	448	if (! ($nextChar === null \|\| $nextChar === "\t" \|\| $nextChar === ' ')) {
100	234	return null;
101		}
102
103		// If it interrupts paragraph, make sure first line isn't blank
104	220	if ($inParagraph && ! RegexHelper::matchAt(RegexHelper::REGEX_NON_SPACE, $rest, $markerLength)) {
		0 ignored issues – show Bug Best Practice introduced 2020-06-27 13:42 UTC by Report Bug Copy Issue Report The expression `League\CommonMark\Util\R..., $rest, $markerLength)` of type `integer\|null` is loosely compared to `false`; this is ambiguous if the integer can be 0. You might want to explicitly use `=== null` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `integer` values, zero is a special case, in particular the following results might be unexpected: 0 == false // true 0 == null // true 123 == false // false 123 == null // false // It is often better to use strict comparison 0 === false // false 0 === null // false Loading history...
105	4	return null;
106		}
107
108	216	$cursor->advanceToNextNonSpaceOrTab(); // to start of marker
109	216	$cursor->advanceBy($markerLength, true); // to end of marker
110	216	$data->padding = self::calculateListMarkerPadding($cursor, $markerLength);
111
112	216	return $data;
113		}
114
115	216	private static function calculateListMarkerPadding(Cursor $cursor, int $markerLength): int
116		{
117	216	$start = $cursor->saveState();
118	216	$spacesStartCol = $cursor->getColumn();
119
120	216	while ($cursor->getColumn() - $spacesStartCol < 5) {
121	216	if (! $cursor->advanceBySpaceOrTab()) {
122	210	break;
123		}
124		}
125
126	216	$blankItem = $cursor->peek() === null;
127	216	$spacesAfterMarker = $cursor->getColumn() - $spacesStartCol;
128
129	216	if ($spacesAfterMarker >= 5 \|\| $spacesAfterMarker < 1 \|\| $blankItem) {
130	58	$cursor->restoreState($start);
131	58	$cursor->advanceBySpaceOrTab();
132
133	58	return $markerLength + 1;
134		}
135
136	174	return $markerLength + $spacesAfterMarker;
137		}
138
139		/**
140		* @psalm-return non-empty-string
141		*/
142	1260	private function generateListMarkerRegex(): string
143		{
144		// No configuration given - use the defaults
145	1260	if ($this->config === null) {
146		return $this->listMarkerRegex = '/^[*+-]/';
147		}
148
149	1260	$markers = $this->config->get('commonmark/unordered_list_markers');
150		\assert(\is_array($markers));
151
152	1258	return $this->listMarkerRegex = '/^[' . \preg_quote(\implode('', $markers), '/') . ']/';
153		}
154		}
155

thephpleague / commonmark

ListBlockStartParser::parseList() B last analyzed 2025-06-12 21:27 UTC

Complexity

Size

Duplication

Code Coverage

Importance

How to fix Complexity

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ListBlockStartParser::parseList() B
last analyzed 2025-06-12 21:27 UTC