markdown_forge

A GitHub-Flavored Markdown renderer and source editor for Flutter — the notes engine of AllisWell, extracted so any app can use it.

Why another markdown package?

Because every block knows the source line it came from. The widget tree is hand-written over the markdown package's parser precisely to keep that map, and it is what makes the features that need positions possible at all:

• Scroll-synced outline — a heading tree that follows the reader, as a side panel or a sheet, with #anchor jumps.
• Heading folding — session-only; folding never mutates the document.
• Split view — source and preview, scroll-synced both ways.
• Live syntax while you type (Obsidian/Typora style) inside an ordinary TextField: headings sized in the field, bold bold, ** markers quiet unless the caret is on their line. Markers are dimmed, never hidden — a TextEditingController must return exactly the characters of its text, or every caret offset after the first difference points at the wrong character.

Also in the box: GFM tables, task lists, footnotes, alerts (> [!NOTE]), fenced code with language labels and copy buttons, KaTeX math (pure Flutter, no web view), Mermaid flowcharts and sequence diagrams (parsed AST, no JS engine), YAML front-matter as a properties strip, a scrolling toolbar, slash commands, a ⌘K command palette, find & replace, focus mode, and word counts.

A document is untrusted input. Raw HTML renders as inert source, link schemes are an allowlist, and nothing on the reading path executes anything.

Install

flutter pub add markdown_forge

A runnable reading + editing screen lives in example/.

Use

import 'package:markdown_forge/markdown_forge.dart';

// Rendering:
MarkdownView(document: parseMarkdown(source));

// Reading view with outline + folding:
ReadingMode(markdown: source);

// Editing with live syntax:
final controller = MdSourceController(text: source);
SourceMode(controller: controller);

It works with zero configuration — theme from your ColorScheme, English labels, http(s) images. To supply your own, wrap once:

MarkdownForge(
  theme: MarkdownTheme.fromMaterial(Theme.of(context)), // or hand-built
  strings: MarkdownStrings(
    outline: 'İçindekiler',
    fold: myTurkishFold, // ı→i, İ→i… the default lowercase can't know this
  ),
  imageResolver: (source, alt) {
    final id = myScheme(source);
    if (id != null) return MarkdownImageWidget((_) => MyImage(id));
    return defaultImageResolver(source, alt);
  },
  linkSchemes: {'http', 'https', 'mailto', 'myapp'},
  child: ...,
)

The three seams are deliberate: a renderer that reaches for a host's design tokens, localization layer or DI container is not a package. markdown_forge depends on markdown, highlight and flutter_math_fork — nothing else.

License

MIT © BUBIAPSS BILGI TEKNOLOJILERI ARGE LIMITED SIRKETI