Module markdown 

MarkdownView — render a Markdown string as formatted text with images.

Uses pulldown-cmark for parsing, then converts the event stream into a flat list of styled lines, inline image runs, and image placeholders. Word-wrapping is computed in layout() using the standalone measure_text_metrics function so no DrawCtx is needed at layout time.

Image support

Pass an image_provider closure via MarkdownView::with_image_provider. It receives the image URL/path string and should return Some((rgba_bytes, width, height)) or None for unknown images. The data must be tightly-packed RGBA8 in row-major order, top-row first.

Images are decoded and cached on the first layout() call and then drawn via DrawCtx::draw_image_rgba() on every paint().

Supported Markdown features

• Headings H1–H4 (larger font sizes)
• Paragraphs (word-wrapped)
• Bullet lists (-/*) with “• “ prefix
• Ordered lists with “N. “ prefix
• Inline code `x` (highlight)
• Fenced code blocks (background box)
• Horizontal rules (thin separator line)
• Images via image_provider callback; compact inline placeholder when unavailable
• Links (coloured text, URL is not opened — add on_link_click if needed)

Structs

MarkdownView

A widget that renders a Markdown string as formatted, word-wrapped text with optional image support.