Function mappingRecognize

packages/scripts/src/projects/cx.ts:994–1067

* 繁体字识别-字典匹配 * @see 参考 https://bbs.tampermonkey.net.cn/thread-2303-1-1.html

(doc: Document = document)

 * @see 参考 https://bbs.tampermonkey.net.cn/thread-2303-1-1.html
 */
async function mappingRecognize(doc: Document = document) {
	let typrMapping = Object.create({});
	try {
		// @ts-ignore
		top.typrMapping = top.typrMapping || (await loadTyprMapping());
		// @ts-ignore
		typrMapping = top.typrMapping;
	} catch {
		// 超星考试可能嵌套其他平台中，所以会存在跨域，这里需要处理一下跨域情况，如果是跨域直接在当前页面加载字库
		typrMapping = await loadTyprMapping();
	}

	/** 判断是否有繁体字 */
	const fontFaceEl = Array.from(doc.head.querySelectorAll('style')).find((style) =>
		style.textContent?.includes('font-cxsecret')
	);

	const base64ToUint8Array = (base64: string) => {
		const data = window.atob(base64);
		const buffer = new Uint8Array(data.length);
		for (let i = 0; i < data.length; ++i) {
			buffer[i] = data.charCodeAt(i);
		}
		return buffer;
	};

	const fontMap = typrMapping;
	if (fontFaceEl && Object.keys(fontMap).length > 0) {
		// 解析font-cxsecret字体
		const font = fontFaceEl.textContent?.match(/base64,([\w\W]+?)'/)?.[1];

		if (font) {
			$console.log('正在识别繁体字');

			const code = Typr.parse(base64ToUint8Array(font));

			// 匹配解密字体
			const match: any = {};
			for (let i = 19968; i < 40870; i++) {
				// 中文[19968, 40869]
				const Glyph = Typr.U.codeToGlyph(code, i);
				if (!Glyph) continue;
				const path = Typr.U.glyphToPath(code, Glyph);
				const hex = md5(JSON.stringify(path)).slice(24); // 8位即可区分
				match[i.toString()] = fontMap[hex];
			}
			const fonts = CXAnalyses.getSecretFont(doc);
			// 替换加密字体
			fonts.forEach((el, index) => {
				let html = el.innerHTML;
				for (const key in match) {
					const word = String.fromCharCode(parseInt(key));
					const value = String.fromCharCode(match[key]);

					// 如果相同，则不需要替换
					if (word === value) {
						continue;
					}