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55 lines
2.3 KiB
Plaintext
55 lines
2.3 KiB
Plaintext
import { RefObject } from "react";
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import { App } from "../app.js";
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/**
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* React hook that automatically reports UI size changes to the host.
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*
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* Uses `ResizeObserver` to watch `document.body` and `document.documentElement` for
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* size changes and sends `ui/notifications/size-changed` notifications.
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*
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* The hook automatically cleans up the `ResizeObserver` when the component unmounts.
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*
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* **Note**: This hook is rarely needed since the {@link useApp `useApp`} hook automatically enables
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* auto-resize by default. This hook is provided for advanced cases where you
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* create the {@link App `App`} manually with `autoResize: false` and want to add auto-resize
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* behavior later.
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*
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* @param app - The connected {@link App `App`} instance, or null during initialization
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* @param elementRef - Currently unused. The hook always observes `document.body`
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* and `document.documentElement` regardless of this value. Passing a ref will
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* cause unnecessary effect re-runs; omit this parameter.
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*
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* @example Manual App creation with custom auto-resize control
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* ```tsx source="./useAutoResize.examples.tsx#useAutoResize_manualApp"
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* function MyComponent() {
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* // For custom App options, create App manually instead of using useApp
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* const [app, setApp] = useState<App | null>(null);
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* const [error, setError] = useState<Error | null>(null);
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*
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* useEffect(() => {
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* const myApp = new App(
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* { name: "MyApp", version: "1.0.0" },
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* {}, // capabilities
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* { autoResize: false }, // Disable default auto-resize
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* );
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*
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* const transport = new PostMessageTransport(window.parent, window.parent);
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* myApp
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* .connect(transport)
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* .then(() => setApp(myApp))
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* .catch((err) => setError(err));
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* }, []);
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*
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* // Add manual auto-resize control
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* useAutoResize(app);
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*
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* if (error) return <div>Connection failed: {error.message}</div>;
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* return <div>My content</div>;
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* }
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* ```
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*
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* @see {@link App.setupSizeChangedNotifications `App.setupSizeChangedNotifications`} for the underlying implementation
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* @see {@link useApp `useApp`} which enables auto-resize by default
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* @see {@link App `App`} constructor for configuring `autoResize` option
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*/
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export declare function useAutoResize(app: App | null, elementRef?: RefObject<HTMLElement | null>): void;
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