// ==UserScript==
// @name            字体渲染（自用脚本）
// @namespace       https://openuserjs.org/users/t3xtf0rm4tgmail.com
// @version         2020.11.27.2
// @icon            https://github.githubassets.com/favicons/favicon.svg
// @description     让每个页面的字体变得有质感，默认使用苹方字体加阴影，自用脚本不处理外部需求。
// @author          F9y4ng
// @include         *
// @grant           none
// @license         GPL-3.0-only
// @create          2020-11-24
// @copyright       2020, F9y4ng
// @run-at          document-start
// @downloadURL none
// ==/UserScript==

(function() {

	'use strict';
	/*你可以自定义以下内容*/
	const shadow_r = 4; //建议控制在4~8之间，关闭阴影为0
	const shadow_c = `#888`; //建议#777,#888,#999 或依喜好修改，currentcolor为原字体颜色（慎用）
	const cssfun = `body:not(input):not(textarea):not(i):not(em):not(pre):not(code):not([class*="icon"]):not([class*="fa"]):not([class*="logo"]):not([class*="mi"]):not([class*="code"])`; //可以继续添加需要屏蔽的标签或classname或ID


	/* 请勿修改以下代码 */
	let isdebug = false,
		shadow = "";
	let debug = isdebug ? console.log.bind(console) : function() {};
	if (shadow_r !== 0) {
		shadow = `text-shadow: 1px 1px ` + shadow_r + `px ` + shadow_c + `!important;`;
	}
	let tshadow = cssfun + `{` + shadow + `font-family: 'PingFang SC','Microsoft YaHei',sans-serif!important;}`;

	addStyle(tshadow, "Font_Rendering", "head");

	if (location.host.includes(".baidu.com")) {
		document.addEventListener('DOMNodeInserted', Callback, false);
	}

	function Callback(e) {
		if (e.target !== null && typeof(e.target.className) === "string" && e.target.className.indexOf("Font_Rendering") === 0) {
			return;
		}
		setTimeout(function() {
			addStyle(tshadow, "Font_Rendering", "head");
		}, 200);
	}

	function addStyle(css, className, addToTarget, isReload, initType) {
		RAFInterval(function() {
			let addTo = document.querySelector(addToTarget);
			if (typeof(addToTarget) === "undefined") {
				addTo = (document.head || document.body || document.documentElement || document);
			}
			isReload = isReload || false;
			initType = initType || "text/css";
			if (typeof(addToTarget) === "undefined" || (typeof(addToTarget) !== "undefined" && document.querySelector(addToTarget) !== null)) {
				if (isReload === true) {
					safeRemove("." + className);
				} else if (isReload === false && document.querySelector("." + className) !== null) {
					return true;
				}
				let cssNode = document.createElement("style");
				if (className !== null) {
					cssNode.className = className;
				}
				cssNode.setAttribute("type", initType);
				cssNode.innerHTML = css;
				try {
					addTo.appendChild(cssNode);
				} catch (e) {
					debug('//-> ' + e.name);
				}
				return true;
			}
		}, 200, true);
	}

	function safeRemove(Css) {
		safeFunction(() => {
			let removeNodes = document.querySelectorAll(Css);
			for (let i = 0; i < removeNodes.length; i++) {
				removeNodes[i].remove();
			}
		});
	}

	function safeFunction(func) {
		try {
			func();
		} catch (e) {
			debug('//-> ' + e.name);
		}
	}

	function RAFInterval(callback, period, runNow) {
		const needCount = period / 1000 * 60;
		let times = 0;
		if (runNow === true) {
			const shouldFinish = callback();
			if (shouldFinish) {
				return;
			}
		}

		function step() {
			if (times < needCount) {
				times++;
				requestAnimationFrame(step);
			} else {
				const shouldFinish = callback() || false;
				if (!shouldFinish) {
					times = 0;
					requestAnimationFrame(step);
				} else {
					return;
				}
			}
		}
		requestAnimationFrame(step);
	}
})();