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feat: CanvasRenderer sandboxe + protocole postMessage (#21) #125

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charles wants to merge 3 commits from feat/21-canvas-renderer into main
pull from: feat/21-canvas-renderer
merge into: charles:main
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charles commented 2026-04-06 02:11:46 +00:00
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Closes #21

Ce qui est implemente

Modele Rust pur pour le canvas agent, sans dependance webkit2gtk directe. Le backend WebView sera branche via le trait CanvasBackend quand l'infrastructure GTK sera prete.

Nouveaux types (crates/fractal-gtk/src/canvas.rs)

  • CanvasSize — dimensions clampees a MAX_CANVAS_WIDTH=640 / MAX_CANVAS_HEIGHT=480
  • CANVAS_CSP — default-src 'none'; script-src 'unsafe-inline'; style-src 'unsafe-inline'; img-src data:; (pas de reseau, pas de JS externe)
  • CanvasToHost — protocole canvas -> host : Resize, Action, Ready
  • HostToCanvas — protocole host -> canvas : ThemeChanged, Data + helper to_js_post_message()
  • wrap_canvas_html(body_html) — injecte le CSP meta tag, le listener fractal-host-message et fractalSend()
  • RenderedCanvas — resultat de render_canvas(html, max_size)
  • CanvasBackend trait — render() + send_message(), Send + Sync
  • NoopCanvasBackend — stub pour tests / builds sans GTK
  • CanvasRenderer — point d'entree haut niveau avec canvas_enabled flag ; render_canvas() retourne une erreur si desactive

Modifications

  • Cargo.toml : ajout de serde et serde_json (workspace)
  • lib.rs : pub mod canvas + re-exports des types publics

Tests (7)

canvas_size_clamped_to_max, wrap_canvas_html_includes_csp, wrap_canvas_html_includes_body, render_canvas_disabled_returns_err, render_canvas_enabled_succeeds, host_to_canvas_js_post_message, canvas_to_host_serializes

Closes #21 ## Ce qui est implemente Modele Rust pur pour le canvas agent, sans dependance webkit2gtk directe. Le backend WebView sera branche via le trait `CanvasBackend` quand l'infrastructure GTK sera prete. ### Nouveaux types (`crates/fractal-gtk/src/canvas.rs`) - `CanvasSize` — dimensions clampees a `MAX_CANVAS_WIDTH=640` / `MAX_CANVAS_HEIGHT=480` - `CANVAS_CSP` — `default-src 'none'; script-src 'unsafe-inline'; style-src 'unsafe-inline'; img-src data:;` (pas de reseau, pas de JS externe) - `CanvasToHost` — protocole canvas -> host : `Resize`, `Action`, `Ready` - `HostToCanvas` — protocole host -> canvas : `ThemeChanged`, `Data` + helper `to_js_post_message()` - `wrap_canvas_html(body_html)` — injecte le CSP meta tag, le listener `fractal-host-message` et `fractalSend()` - `RenderedCanvas` — resultat de `render_canvas(html, max_size)` - `CanvasBackend` trait — `render()` + `send_message()`, `Send + Sync` - `NoopCanvasBackend` — stub pour tests / builds sans GTK - `CanvasRenderer` — point d'entree haut niveau avec `canvas_enabled` flag ; `render_canvas()` retourne une erreur si desactive ### Modifications - `Cargo.toml` : ajout de `serde` et `serde_json` (workspace) - `lib.rs` : `pub mod canvas` + re-exports des types publics ### Tests (7) `canvas_size_clamped_to_max`, `wrap_canvas_html_includes_csp`, `wrap_canvas_html_includes_body`, `render_canvas_disabled_returns_err`, `render_canvas_enabled_succeeds`, `host_to_canvas_js_post_message`, `canvas_to_host_serializes`
feat(fractal-gtk): expose canvas module in lib.rs (#21)
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charles closed this pull request 2026-04-06 02:13:28 +00:00
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