Marc Mintel
5397309103
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103 lines
3.1 KiB
Plaintext
103 lines
3.1 KiB
Plaintext
/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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*/
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'use strict';
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var LexicalComposerContext = require('@lexical/react/LexicalComposerContext');
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var react = require('react');
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/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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*/
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const CAN_USE_DOM = typeof window !== 'undefined' && typeof window.document !== 'undefined' && typeof window.document.createElement !== 'undefined';
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/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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*/
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// This workaround is no longer necessary in React 19,
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// but we currently support React >=17.x
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// https://github.com/facebook/react/pull/26395
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const useLayoutEffectImpl = CAN_USE_DOM ? react.useLayoutEffect : react.useEffect;
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/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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*/
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/**
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* Shortcut to Lexical subscriptions when values are used for render.
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* @param subscription - The function to create the {@link LexicalSubscription}. This function's identity must be stable (e.g. defined at module scope or with useCallback).
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*/
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function useLexicalSubscription(subscription) {
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const [editor] = LexicalComposerContext.useLexicalComposerContext();
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const initializedSubscription = react.useMemo(() => subscription(editor), [editor, subscription]);
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const [value, setValue] = react.useState(() => initializedSubscription.initialValueFn());
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const valueRef = react.useRef(value);
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useLayoutEffectImpl(() => {
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const {
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initialValueFn,
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subscribe
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} = initializedSubscription;
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const currentValue = initialValueFn();
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if (valueRef.current !== currentValue) {
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valueRef.current = currentValue;
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setValue(currentValue);
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}
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return subscribe(newValue => {
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valueRef.current = newValue;
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setValue(newValue);
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});
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}, [initializedSubscription, subscription]);
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return value;
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}
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/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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*/
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function subscription(editor) {
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return {
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initialValueFn: () => editor.isEditable(),
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subscribe: callback => {
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return editor.registerEditableListener(callback);
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}
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};
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}
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/**
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* Get the current value for {@link LexicalEditor.isEditable}
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* using {@link useLexicalSubscription}.
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* You should prefer this over manually observing the value with
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* {@link LexicalEditor.registerEditableListener},
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* which is a bit tricky to do correctly, particularly when using
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* React StrictMode (the default for development) or concurrency.
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*/
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function useLexicalEditable() {
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return useLexicalSubscription(subscription);
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}
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exports.useLexicalEditable = useLexicalEditable;
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