57 lines
1.5 KiB
TypeScript
57 lines
1.5 KiB
TypeScript
import { useContext, useMemo } from 'react';
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import { UseBoundStoreWithEqualityFn, useStoreWithEqualityFn as useZustandStore } from 'zustand/traditional';
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import { errorMessages } from '@xyflow/system';
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import StoreContext from '../contexts/RFStoreContext';
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import type { Edge, Node, ReactFlowState } from '../types';
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import { StoreApi } from 'zustand';
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const zustandErrorMessage = errorMessages['error001']();
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/**
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* Hook for accessing the internal store. Should only be used in rare cases.
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*
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* @public
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* @param selector
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* @param equalityFn
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* @returns The selected state slice
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*
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* @example
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* const nodes = useStore((state: ReactFlowState<MyNodeType>) => state.nodes);
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*
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*/
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function useStore<StateSlice = unknown>(
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selector: (state: ReactFlowState) => StateSlice,
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equalityFn?: (a: StateSlice, b: StateSlice) => boolean
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) {
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const store = useContext(StoreContext);
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if (store === null) {
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throw new Error(zustandErrorMessage);
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}
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return useZustandStore(store, selector, equalityFn);
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}
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function useStoreApi<NodeType extends Node = Node, EdgeType extends Edge = Edge>() {
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const store = useContext(StoreContext) as UseBoundStoreWithEqualityFn<
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StoreApi<ReactFlowState<NodeType, EdgeType>>
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> | null;
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if (store === null) {
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throw new Error(zustandErrorMessage);
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}
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return useMemo(
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() => ({
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getState: store.getState,
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setState: store.setState,
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subscribe: store.subscribe,
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destroy: store.destroy,
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}),
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[store]
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);
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}
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export { useStore, useStoreApi };
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