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    graphviz

    Graphviz rewrite in MoonBit

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    Version
    0.1.11
    License
    EPL-2.0
    Repository
    Last updated
    yesterday
    Downloads
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    No dependencies

    #graphviz

    moonbit-community/graphviz provides synchronous, in-memory Graphviz parsing, layout, and rendering in MoonBit, with no external module dependencies.

    Packages:

    • cgraph: graph data model
    • dot: DOT parser and writer
    • text: font/run measurement contract and shared font-name resolution
    • text/heuristic: optional native-compatible heuristic metrics and calibration
    • text/canvas: optional JavaScript Canvas metrics
    • layout/text: explicitly bound measurement context
    • layout/dot: graph layout
    • render/xdot: XDOT rendering
    • render/svg: SVG rendering

    Supply input as a string to @dot.parse_dot. Parsing needs no measurer. Layout entry points require an explicit text_context; for example:

    let graph = @dot.parse_dot(input)
    let layout = @layout_dot.layout_dot(graph, text_context=@heuristic.context())
    let svg = @svg.render_svg(layout)

    For web applications, use @text_layout.Context::new(@canvas.Canvas::new(ctx)) instead of importing text/heuristic. The layout output retains this context for SVG/XDOT rendering and attribute writeback. There is no implicit provider or fallback. See text measurement for units, browser font loading, cache lifetime, and custom providers.

    For layout-annotated DOT, call layout.apply() before @dot.write_dot(layout.graph).

    File I/O, command-line processing, and file-based integration tests live in the separate moonbit-community/graphviz-cli module. Its cli and dot/fs packages replace the former moonbit-community/graphviz/cli and moonbit-community/graphviz/dot/fs packages.

    The repository's moon.work connects both modules for local development. Run moon check --target native --deny-warn from the repository root to check both modules.

    Output parity fixtures come from upstream Graphviz 14.1.1. See the repository README and AGENTS.md for validation and fixture policy.