65 lines
2.0 KiB
TypeScript
65 lines
2.0 KiB
TypeScript
import {EditorView, ViewPlugin, ViewUpdate} from '@codemirror/view';
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import {useEditorStateStore} from '@/stores/editorStateStore';
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import {createDebounce} from '@/common/utils/debounce';
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/**
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* 光标位置持久化扩展
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* 实时监听光标位置变化并持久化到 editorStateStore
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*/
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export function createCursorPositionExtension(documentId: number) {
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return ViewPlugin.fromClass(
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class CursorPositionPlugin {
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private readonly editorStateStore = useEditorStateStore();
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private readonly debouncedSave;
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constructor(private view: EditorView) {
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const {debouncedFn, flush} = createDebounce(
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() => this.saveCursorPosition(),
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{delay: 1000}
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);
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this.debouncedSave = {fn: debouncedFn, flush};
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// 初始化时保存一次光标位置
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this.saveCursorPosition();
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}
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update(update: ViewUpdate) {
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// 只在选择变化时触发
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if (!update.selectionSet) {
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return;
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}
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// 防抖保存光标位置
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this.debouncedSave.fn();
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}
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destroy() {
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// 销毁时立即执行待保存的操作
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this.debouncedSave.flush();
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// 再保存一次确保最新状态
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this.saveCursorPosition();
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}
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private saveCursorPosition() {
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const cursorPos = this.view.state.selection.main.head;
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this.editorStateStore.saveCursorPosition(documentId, cursorPos);
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}
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}
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);
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}
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/**
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* 滚动到当前光标位置（视口中心）
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* @param view 编辑器视图
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*/
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export function scrollToCursor(view: EditorView) {
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const cursorPos = view.state.selection.main.head;
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view.dispatch({
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effects: EditorView.scrollIntoView(cursorPos, {
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y: 'center',
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x: 'center'
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})
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});
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}
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