59 lines
1.5 KiB
TypeScript
59 lines
1.5 KiB
TypeScript
/*
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* Copyright 2025 coze-dev Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { useEffect, useState } from 'react';
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import { type Canvas, type FabricObject } from 'fabric';
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import { setElementAfterLoad } from '../utils';
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import { type FabricSchema } from '../typings';
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/**
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* 监听 schema 变化，reload canvas
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* 仅只读态需要
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*/
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export const useSchemaChange = ({
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canvas,
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schema,
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readonly,
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}: {
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canvas: Canvas | undefined;
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schema: FabricSchema;
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readonly: boolean;
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}) => {
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const [loading, setLoading] = useState(false);
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useEffect(() => {
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setLoading(true);
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canvas
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?.loadFromJSON(JSON.stringify(schema), (elementSchema, element) => {
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// 这里是 schema 中每个元素被加载后的回调
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setElementAfterLoad({
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element: element as FabricObject,
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options: { readonly },
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canvas,
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});
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})
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.then(() => {
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setLoading(false);
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canvas?.requestRenderAll();
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});
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}, [schema, canvas]);
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return {
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loading,
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};
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};
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