[2.x] Custom Markdown heading renderer

packages/framework/resources/views/components/markdown-heading.blade.php

@@ -0,0 +1,13 @@
+@props(['level' => 1, 'id' => null, 'addPermalink' => config('markdown.features.permalinks', true)])
+
+@php
+    $tag = 'h' . $level;
+    $id = $id ?? \Illuminate\Support\Str::slug($slot);
+@endphp
+
+<{{ $tag }} {{ $attributes->merge(['id' => $id]) }}>
+    {!! $slot !!}
+    @if($addPermalink === true)
+        <a href="#{{ $id }}" class="heading-permalink" aria-label="Permalink for this section"></a>
+    @endif
+</{{ $tag }}> 

packages/framework/src/Markdown/Processing/HeadingRenderer.php

@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Hyde\Markdown\Processing;
+
+use League\CommonMark\Extension\CommonMark\Node\Block\Heading;
+use League\CommonMark\Node\Node;
+use League\CommonMark\Renderer\ChildNodeRendererInterface;
+use League\CommonMark\Renderer\NodeRendererInterface;
+
+/**
+ * Renders a heading node, and supports built-in permalink generation.
+ *
+ * @see \League\CommonMark\Extension\CommonMark\Renderer\Block\HeadingRenderer
+ */
+class HeadingRenderer implements NodeRendererInterface
+{
+    public function render(Node $node, ChildNodeRendererInterface $childRenderer): string
+    {
+        if (! ($node instanceof Heading)) {
+            throw new \InvalidArgumentException('Incompatible node type: '.get_class($node));
+        }
+
+        $content = $childRenderer->renderNodes($node->children());
+
+        return view('hyde::components.markdown-heading', [
+            'level' => $node->getLevel(),
+            'slot' => $content,
+            'addPermalink' => config('markdown.features.permalinks', true) && ! str_contains($content, 'class="heading-permalink"'),
+        ])->render();
+    }
+}