61 lines
1.6 KiB
TypeScript
61 lines
1.6 KiB
TypeScript
import { useEffect, useState } from "react";
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import type { RenderedMarkdownDocument } from "@md-to-pdf/core";
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import { renderMarkdownDocument } from "./application-backend";
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import type { MarkdownImageResource } from "./application-backend";
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export interface MarkdownRenderCallbacks {
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onRenderStart?: () => void;
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onStatusChange?: (status: string) => void;
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}
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export function useMarkdownRender(
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markdown: string,
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language: string,
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resources: MarkdownImageResource[],
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callbacks: MarkdownRenderCallbacks = {}
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) {
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const [result, setResult] =
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useState<RenderedMarkdownDocument | null>(null);
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const [error, setError] = useState("");
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const { onRenderStart, onStatusChange } = callbacks;
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useEffect(() => {
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const controller = new AbortController();
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const timer = window.setTimeout(() => {
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onStatusChange?.("正在渲染…");
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onRenderStart?.();
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setError("");
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void renderMarkdownDocument(
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{ markdown, language, resources },
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controller.signal
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)
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.then((payload) => {
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setResult(payload);
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onStatusChange?.("预览已更新");
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})
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.catch((reason: unknown) => {
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if (!controller.signal.aborted) {
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setError(
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reason instanceof Error ? reason.message : "渲染失败"
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);
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onStatusChange?.("预览失败");
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}
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});
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}, 250);
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return () => {
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window.clearTimeout(timer);
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controller.abort();
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};
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}, [
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language,
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markdown,
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onRenderStart,
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onStatusChange,
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resources
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]);
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return { error, result };
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}
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