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<?php
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declare(strict_types=1);
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/*
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* This file is part of the league/commonmark package.
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*
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* (c) Colin O'Dell <colinodell@gmail.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace League\CommonMark\Extension\TableOfContents;
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use League\CommonMark\Extension\TableOfContents\Node\TableOfContentsPlaceholder;
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use League\CommonMark\Parser\Block\AbstractBlockContinueParser;
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use League\CommonMark\Parser\Block\BlockContinue;
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use League\CommonMark\Parser\Block\BlockContinueParserInterface;
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use League\CommonMark\Parser\Block\BlockStart;
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use League\CommonMark\Parser\Block\BlockStartParserInterface;
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use League\CommonMark\Parser\Cursor;
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use League\CommonMark\Parser\MarkdownParserStateInterface;
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use League\Config\ConfigurationAwareInterface;
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use League\Config\ConfigurationInterface;
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final class TableOfContentsPlaceholderParser extends AbstractBlockContinueParser
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{
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/** @psalm-readonly */
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private TableOfContentsPlaceholder $block;
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public function __construct()
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{
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$this->block = new TableOfContentsPlaceholder();
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}
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public function getBlock(): TableOfContentsPlaceholder
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{
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return $this->block;
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}
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public function tryContinue(Cursor $cursor, BlockContinueParserInterface $activeBlockParser): ?BlockContinue
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{
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return BlockContinue::none();
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}
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public static function blockStartParser(): BlockStartParserInterface
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{
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return new class () implements BlockStartParserInterface, ConfigurationAwareInterface {
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/** @psalm-readonly-allow-private-mutation */
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private ConfigurationInterface $config;
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public function tryStart(Cursor $cursor, MarkdownParserStateInterface $parserState): ?BlockStart
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{
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$placeholder = $this->config->get('table_of_contents/placeholder');
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if ($placeholder === null) {
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return BlockStart::none();
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}
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// The placeholder must be the only thing on the line
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if ($cursor->match('/^' . \preg_quote($placeholder, '/') . '$/') === null) {
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return BlockStart::none();
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}
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return BlockStart::of(new TableOfContentsPlaceholderParser())->at($cursor);
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}
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public function setConfiguration(ConfigurationInterface $configuration): void
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{
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$this->config = $configuration;
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}
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};
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}
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}
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