TableOfContentsGenerator::getNormalizer() - Code Metrics - Inspection of "[TableOfContents] Add a label option" - thephpleague/commonmark - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — main (#1074)

unknown

created 2025-07-08 18:06 UTC

TableOfContentsGenerator::getNormalizer() A

↳ Parent: TableOfContentsGenerator

Complexity

Conditions	4
Paths	4

Size

Total Lines	11
Code Lines	9

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	8
CRAP Score	4.0218

Importance

Changes

Metric	Value
cc	4
eloc	9
c	0
b	0
f	0
nc	4
nop	1
dl	0
loc	11
ccs	8
cts	9
cp	0.8889
crap	4.0218
rs	9.9666

<?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\TableOfContents;

use League\CommonMark\Extension\CommonMark\Node\Block\Heading;
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\Extension\CommonMark\Node\Inline\Link;
use League\CommonMark\Extension\CommonMark\Node\Inline\Strong;
use League\CommonMark\Extension\HeadingPermalink\HeadingPermalink;
use League\CommonMark\Extension\TableOfContents\Node\TableOfContents;
use League\CommonMark\Extension\TableOfContents\Node\TableOfContentsWrapper;
use League\CommonMark\Extension\TableOfContents\Normalizer\AsIsNormalizerStrategy;
use League\CommonMark\Extension\TableOfContents\Normalizer\FlatNormalizerStrategy;
use League\CommonMark\Extension\TableOfContents\Normalizer\NormalizerStrategyInterface;
use League\CommonMark\Extension\TableOfContents\Normalizer\RelativeNormalizerStrategy;
use League\CommonMark\Node\Block\AbstractBlock;
use League\CommonMark\Node\Block\Document;
use League\CommonMark\Node\Inline\Text;
use League\CommonMark\Node\NodeIterator;
use League\CommonMark\Node\RawMarkupContainerInterface;
use League\CommonMark\Node\StringContainerHelper;
use League\Config\Exception\InvalidConfigurationException;

final class TableOfContentsGenerator implements TableOfContentsGeneratorInterface
{
    public const STYLE_BULLET  = ListBlock::TYPE_BULLET;
    public const STYLE_ORDERED = ListBlock::TYPE_ORDERED;

    public const NORMALIZE_DISABLED = 'as-is';
    public const NORMALIZE_RELATIVE = 'relative';
    public const NORMALIZE_FLAT     = 'flat';

    /** @psalm-readonly */
    private string $style;

    /** @psalm-readonly */
    private string $normalizationStrategy;

    /** @psalm-readonly */
    private int $minHeadingLevel;

    /** @psalm-readonly */
    private int $maxHeadingLevel;

    /** @psalm-readonly */
    private string $fragmentPrefix;

    /** @psalm-readonly */
    private string $label;

    public function __construct(string $style, string $normalizationStrategy, int $minHeadingLevel, int $maxHeadingLevel, string $fragmentPrefix, string $label = '')
    {
        $this->style                 = $style;
        $this->normalizationStrategy = $normalizationStrategy;
        $this->minHeadingLevel       = $minHeadingLevel;
        $this->maxHeadingLevel       = $maxHeadingLevel;
        $this->fragmentPrefix        = $fragmentPrefix;
        $this->label                 = $label;

        if ($fragmentPrefix !== '') {
            $this->fragmentPrefix .= '-';
        }
    }

    /**
     * If there is a table of contents, returns either a `TableOfContents` or
     * `TableOfContentsWrapper` node object
     */
    public function generate(Document $document): ?AbstractBlock
    {
        $toc = $this->createToc($document);

        $normalizer = $this->getNormalizer($toc);

        $firstHeading = null;

        foreach ($this->getHeadingLinks($document) as $headingLink) {
            $heading = $headingLink->parent();
            // Make sure this is actually tied to a heading
            if (! $heading instanceof Heading) {
                continue;
            }

            // Skip any headings outside the configured min/max levels
            if ($heading->getLevel() < $this->minHeadingLevel || $heading->getLevel() > $this->maxHeadingLevel) {
                continue;
            }

            // Keep track of the first heading we see - we might need this later
            $firstHeading ??= $heading;

            // Keep track of the start and end lines
            $toc->setStartLine($firstHeading->getStartLine());
            $toc->setEndLine($heading->getEndLine());

            // Create the new link
            $link = new Link('#' . $this->fragmentPrefix . $headingLink->getSlug(), StringContainerHelper::getChildText($heading, [RawMarkupContainerInterface::class]));

            $listItem = new ListItem($toc->getListData());
            $listItem->setStartLine($heading->getStartLine());
            $listItem->setEndLine($heading->getEndLine());
            $listItem->appendChild($link);

            // Add it to the correct place
            $normalizer->addItem($heading->getLevel(), $listItem);
        }

        // Don't add the TOC if no headings were present
        if (! $toc->hasChildren() || $firstHeading === null) {
            return null;
        }

        if ($this->label !== '') {
            $label = new Strong();
            $label->appendChild(new Text($this->label));
            $wrapper = new TableOfContentsWrapper();
            $wrapper->appendChild($label);
            $wrapper->appendChild($toc);
            $wrapper->setStartLine($toc->getStartLine());
            $wrapper->setEndLine($toc->getEndLine());
            return $wrapper;
        }

        return $toc;
    }

    private function createToc(Document $document): TableOfContents
    {
        $listData = new ListData();

        if ($this->style === self::STYLE_BULLET) {
            $listData->type = ListBlock::TYPE_BULLET;
        } elseif ($this->style === self::STYLE_ORDERED) {
            $listData->type = ListBlock::TYPE_ORDERED;
        } else {
            throw new InvalidConfigurationException(\sprintf('Invalid table of contents list style: "%s"', $this->style));
        }

        $toc = new TableOfContents($listData);

        $toc->setStartLine($document->getStartLine());
        $toc->setEndLine($document->getEndLine());

        return $toc;
    }

    /**
     * @return iterable<HeadingPermalink>
     */
    private function getHeadingLinks(Document $document): iterable
    {
        foreach ($document->iterator(NodeIterator::FLAG_BLOCKS_ONLY) as $node) {
            if (! $node instanceof Heading) {
                continue;
            }

            foreach ($node->children() as $child) {
                if ($child instanceof HeadingPermalink) {
                    yield $child;
                }
            }
        }
    }

    private function getNormalizer(TableOfContents $toc): NormalizerStrategyInterface
    {
        switch ($this->normalizationStrategy) {
            case self::NORMALIZE_DISABLED:
                return new AsIsNormalizerStrategy($toc);
            case self::NORMALIZE_RELATIVE:
                return new RelativeNormalizerStrategy($toc);
            case self::NORMALIZE_FLAT:
                return new FlatNormalizerStrategy($toc);
            default:
                throw new InvalidConfigurationException(\sprintf('Invalid table of contents normalization strategy: "%s"', $this->normalizationStrategy));
        }
    }
}


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\TableOfContents;
15
16		use League\CommonMark\Extension\CommonMark\Node\Block\Heading;
17		use League\CommonMark\Extension\CommonMark\Node\Block\ListBlock;
18		use League\CommonMark\Extension\CommonMark\Node\Block\ListData;
19		use League\CommonMark\Extension\CommonMark\Node\Block\ListItem;
20		use League\CommonMark\Extension\CommonMark\Node\Inline\Link;
21		use League\CommonMark\Extension\CommonMark\Node\Inline\Strong;
22		use League\CommonMark\Extension\HeadingPermalink\HeadingPermalink;
23		use League\CommonMark\Extension\TableOfContents\Node\TableOfContents;
24		use League\CommonMark\Extension\TableOfContents\Node\TableOfContentsWrapper;
25		use League\CommonMark\Extension\TableOfContents\Normalizer\AsIsNormalizerStrategy;
26		use League\CommonMark\Extension\TableOfContents\Normalizer\FlatNormalizerStrategy;
27		use League\CommonMark\Extension\TableOfContents\Normalizer\NormalizerStrategyInterface;
28		use League\CommonMark\Extension\TableOfContents\Normalizer\RelativeNormalizerStrategy;
29		use League\CommonMark\Node\Block\AbstractBlock;
30		use League\CommonMark\Node\Block\Document;
31		use League\CommonMark\Node\Inline\Text;
32		use League\CommonMark\Node\NodeIterator;
33		use League\CommonMark\Node\RawMarkupContainerInterface;
34		use League\CommonMark\Node\StringContainerHelper;
35		use League\Config\Exception\InvalidConfigurationException;
36
37		final class TableOfContentsGenerator implements TableOfContentsGeneratorInterface
38		{
39		public const STYLE_BULLET = ListBlock::TYPE_BULLET;
40		public const STYLE_ORDERED = ListBlock::TYPE_ORDERED;
41
42		public const NORMALIZE_DISABLED = 'as-is';
43		public const NORMALIZE_RELATIVE = 'relative';
44		public const NORMALIZE_FLAT = 'flat';
45
46		/** @psalm-readonly */
47		private string $style;
48
49		/** @psalm-readonly */
50		private string $normalizationStrategy;
51
52		/** @psalm-readonly */
53		private int $minHeadingLevel;
54
55		/** @psalm-readonly */
56		private int $maxHeadingLevel;
57
58		/** @psalm-readonly */
59		private string $fragmentPrefix;
60
61		/** @psalm-readonly */
62		private string $label;
63
64	70	public function __construct(string $style, string $normalizationStrategy, int $minHeadingLevel, int $maxHeadingLevel, string $fragmentPrefix, string $label = '')
65		{
66	70	$this->style = $style;
67	70	$this->normalizationStrategy = $normalizationStrategy;
68	70	$this->minHeadingLevel = $minHeadingLevel;
69	70	$this->maxHeadingLevel = $maxHeadingLevel;
70	70	$this->fragmentPrefix = $fragmentPrefix;
71	70	$this->label = $label;
72
73	70	if ($fragmentPrefix !== '') {
74	70	$this->fragmentPrefix .= '-';
75		}
76		}
77
78		/**
79		* If there is a table of contents, returns either a `TableOfContents` or
80		* `TableOfContentsWrapper` node object
81		*/
82	70	public function generate(Document $document): ?AbstractBlock
83		{
84	70	$toc = $this->createToc($document);
85
86	70	$normalizer = $this->getNormalizer($toc);
87
88	70	$firstHeading = null;
89
90	70	foreach ($this->getHeadingLinks($document) as $headingLink) {
91	62	$heading = $headingLink->parent();
92		// Make sure this is actually tied to a heading
93	62	if (! $heading instanceof Heading) {
94		continue;
95		}
96
97		// Skip any headings outside the configured min/max levels
98	62	if ($heading->getLevel() < $this->minHeadingLevel \|\| $heading->getLevel() > $this->maxHeadingLevel) {
99	4	continue;
100		}
101
102		// Keep track of the first heading we see - we might need this later
103	62	$firstHeading ??= $heading;
104
105		// Keep track of the start and end lines
106	62	$toc->setStartLine($firstHeading->getStartLine());
107	62	$toc->setEndLine($heading->getEndLine());
108
109		// Create the new link
110	62	$link = new Link('#' . $this->fragmentPrefix . $headingLink->getSlug(), StringContainerHelper::getChildText($heading, [RawMarkupContainerInterface::class]));
111
112	62	$listItem = new ListItem($toc->getListData());
113	62	$listItem->setStartLine($heading->getStartLine());
114	62	$listItem->setEndLine($heading->getEndLine());
115	62	$listItem->appendChild($link);
116
117		// Add it to the correct place
118	62	$normalizer->addItem($heading->getLevel(), $listItem);
119		}
120
121		// Don't add the TOC if no headings were present
122	70	if (! $toc->hasChildren() \|\| $firstHeading === null) {
123	8	return null;
124		}
125
126	62	if ($this->label !== '') {
127	4	$label = new Strong();
128	4	$label->appendChild(new Text($this->label));
129	4	$wrapper = new TableOfContentsWrapper();
130	4	$wrapper->appendChild($label);
131	4	$wrapper->appendChild($toc);
132	4	$wrapper->setStartLine($toc->getStartLine());
133	4	$wrapper->setEndLine($toc->getEndLine());
134	4	return $wrapper;
135		}
136
137	58	return $toc;
138		}
139
140	70	private function createToc(Document $document): TableOfContents
141		{
142	70	$listData = new ListData();
143
144	70	if ($this->style === self::STYLE_BULLET) {
145	66	$listData->type = ListBlock::TYPE_BULLET;
146	4	} elseif ($this->style === self::STYLE_ORDERED) {
147	4	$listData->type = ListBlock::TYPE_ORDERED;
148		} else {
149		throw new InvalidConfigurationException(\sprintf('Invalid table of contents list style: "%s"', $this->style));
150		}
151
152	70	$toc = new TableOfContents($listData);
153
154	70	$toc->setStartLine($document->getStartLine());
155	70	$toc->setEndLine($document->getEndLine());
156
157	70	return $toc;
158		}
159
160		/**
161		* @return iterable<HeadingPermalink>
162		*/
163	70	private function getHeadingLinks(Document $document): iterable
164		{
165	70	foreach ($document->iterator(NodeIterator::FLAG_BLOCKS_ONLY) as $node) {
166	70	if (! $node instanceof Heading) {
167	70	continue;
168		}
169
170	62	foreach ($node->children() as $child) {
171	62	if ($child instanceof HeadingPermalink) {
172	62	yield $child;
173		}
174		}
175		}
176		}
177
178	70	private function getNormalizer(TableOfContents $toc): NormalizerStrategyInterface
179		{
180	70	switch ($this->normalizationStrategy) {
181	35	case self::NORMALIZE_DISABLED:
182	4	return new AsIsNormalizerStrategy($toc);
183	33	case self::NORMALIZE_RELATIVE:
184	62	return new RelativeNormalizerStrategy($toc);
185	2	case self::NORMALIZE_FLAT:
186	4	return new FlatNormalizerStrategy($toc);
187		default:
188		throw new InvalidConfigurationException(\sprintf('Invalid table of contents normalization strategy: "%s"', $this->normalizationStrategy));
189		}
190		}
191		}
192

thephpleague / commonmark

Pull Request — main (#1074)

TableOfContentsGenerator::getNormalizer() A

Complexity

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