vendor and env first commit

vendor/league/commonmark/src/Extension/TableOfContents/TableOfContentsPlaceholderParser.php

@@ -0,0 +1,74 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the league/commonmark package.
+ *
+ * (c) Colin O'Dell <colinodell@gmail.com>
+ *
+ * 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\TableOfContents\Node\TableOfContentsPlaceholder;
+use League\CommonMark\Parser\Block\AbstractBlockContinueParser;
+use League\CommonMark\Parser\Block\BlockContinue;
+use League\CommonMark\Parser\Block\BlockContinueParserInterface;
+use League\CommonMark\Parser\Block\BlockStart;
+use League\CommonMark\Parser\Block\BlockStartParserInterface;
+use League\CommonMark\Parser\Cursor;
+use League\CommonMark\Parser\MarkdownParserStateInterface;
+use League\Config\ConfigurationAwareInterface;
+use League\Config\ConfigurationInterface;
+
+final class TableOfContentsPlaceholderParser extends AbstractBlockContinueParser
+{
+    /** @psalm-readonly */
+    private TableOfContentsPlaceholder $block;
+
+    public function __construct()
+    {
+        $this->block = new TableOfContentsPlaceholder();
+    }
+
+    public function getBlock(): TableOfContentsPlaceholder
+    {
+        return $this->block;
+    }
+
+    public function tryContinue(Cursor $cursor, BlockContinueParserInterface $activeBlockParser): ?BlockContinue
+    {
+        return BlockContinue::none();
+    }
+
+    public static function blockStartParser(): BlockStartParserInterface
+    {
+        return new class () implements BlockStartParserInterface, ConfigurationAwareInterface {
+            /** @psalm-readonly-allow-private-mutation */
+            private ConfigurationInterface $config;
+
+            public function tryStart(Cursor $cursor, MarkdownParserStateInterface $parserState): ?BlockStart
+            {
+                $placeholder = $this->config->get('table_of_contents/placeholder');
+                if ($placeholder === null) {
+                    return BlockStart::none();
+                }
+
+                // The placeholder must be the only thing on the line
+                if ($cursor->match('/^' . \preg_quote($placeholder, '/') . '$/') === null) {
+                    return BlockStart::none();
+                }
+
+                return BlockStart::of(new TableOfContentsPlaceholderParser())->at($cursor);
+            }
+
+            public function setConfiguration(ConfigurationInterface $configuration): void
+            {
+                $this->config = $configuration;
+            }
+        };
+    }
+}