用于定位jquery添加的各种事件
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// ==UserScript==
// @name jQuery Hook
// @namespace https://github.com/CC11001100/crawler-js-hook-framework-public/tree/master/020-jQuery-hook
// @version 0.1
// @description 用于定位jquery添加的各种事件
// @document https://github.com/CC11001100/crawler-js-hook-framework-public/blob/master/020-jQuery-hook/README.md
// @author CC11001100
// @match *://*/*
// @run-at document-start
// @grant none
// ==/UserScript==
(() => {
const globalUniqPrefix = "cc11001100";
// 在第一次设置jquery的时候添加Hook
Object.defineProperty(window, "$", {
set: $ => {
// 为jquery的各种方法添加Hook
try {
addHook($);
} catch (e) {
console.error("为jQuery添加Hook时报错： " + e)
}
// 删除set描述符拦截，恢复正常赋值
delete window["$"];
window["$"] = $;
},
configurable: true
});
/**
* 为jquery添加一些hook，等会儿使用jquery为dom元素绑定事件的话就会被捕获到
* @param $
*/
function addHook($) {
if (!$["fn"]) {
console.log("当前页面虽然声明了$变量，但并不是jQuery，因此忽略。");
return;
}
// 一些比较通用的事件的拦截
const eventNameList = [
"click", "dblclick", "blur", "change", "contextmenu", "error", "focus",
"focusin", "focusout", "hover", "holdReady", "proxy", "ready", "keydown", "keypress",
"keyup", "live", "load", "mousedown", "mouseenter", "mouseleave", "mousemove", "mouseout",
"mouseover", "mouseup"
];
for (let eventName of eventNameList) {
const old = $.fn[eventName];
$.fn[eventName] = function () {
try {
setEventFunctionNameToDomObjectAttribute(this, eventName, arguments[0]);
} catch (e) {
console.error(`为jQuery添加${eventName}类型的事件的Hook时发生错误： ${e}`);
}
return old.apply(this, arguments);
}
}
// on，不仅是内置事件类型，还有可能有一些自定义的事件类型
// https://api.jquery.com/on/
const fnOnHolder = $.fn.on;
$.fn.on = function () {
try {
const eventName = arguments[0];
let eventFunction = undefined;
for (let x of arguments) {
if (x instanceof Function) {
eventFunction = x;
break;
}
}
if (eventFunction instanceof Function) {
setEventFunctionNameToDomObjectAttribute(this, eventName, eventFunction);
}
} catch (e) {
console.error(`为jQuery添加on方法的Hook时发生错误： ${e}`);
}
return fnOnHolder.apply(this, arguments);
}
// TODO 还有delegate之类的比较隐晦的绑定事件的方式
console.log(`当前页面使用了jQuery，jQuery Hook已初始化完毕。`);
}
const addressIdGeneratorMap = {};
/**
* 生成一个全局唯一的标识
* @param eventName
*/
function globalUnique(eventName) {
const id = (addressIdGeneratorMap[eventName] || 0) + 1;
addressIdGeneratorMap[eventName] = id;
return `${globalUniqPrefix}_${eventName}_${id}`;
}
/**
* 为绑定了jquery事件的dom元素添加元素，提示所绑定的事件与对应的函数代码的全局变量的名称，只需要复制粘贴跟进去即可
* 注意，有可能会为同一个元素重复绑定相同的事件
*
* @param domObject
* @param eventName
* @param eventFunction
*/
function setEventFunctionNameToDomObjectAttribute(domObject, eventName, eventFunction) {
// TODO bug fix 注意，事件名可能会包含一些非法的字符
// cc11001100-jquery-$destroy-event-function
eventName = safeSymbol(eventName);
const eventFunctionGlobalName = globalUnique(eventName);
window[eventFunctionGlobalName] = eventFunction;
const attrName = `${globalUniqPrefix}-jQuery-${eventName}-event-function`;
if (domObject.attr(attrName)) {
domObject.attr(attrName + "-" + new Date().getTime(), eventFunctionGlobalName);
} else {
domObject.attr(attrName, eventFunctionGlobalName);
}
}
/***
*
* @param name
*/
function safeSymbol(name) {
const replaceMap = {
".": "_dot_",
"$": "_dollar_",
"-": "_dash_"
};
for (let key of Object.getOwnPropertyNames(replaceMap)) {
name = name.replace(key, replaceMap[key]);
}
return name;
}
})();