// ==UserScript==
// @name                 Remove Restrictions and Restore Default Behavior
// @name:zh-CN           解除网页限制，恢复默认行为
// @name:en-US           Remove Restrictions and Restore Default Behavior
// @namespace            http://hl-bo.github.io/namespaces/user-script/remove-limits
// @source               https://github.com/HL-Bo/user-script
// @supportURL           https://github.com/HL-Bo/user-script/issues
// @version              2.1
// @license              AGPLv3
// @description          Allows you select, cut, copy, paste, save and open the DevTools on any website.
// @description:zh-CN    恢复选择、剪切、复制、粘贴、保存、右键菜单和打开开发者工具的默认行为。
// @description:en-US    Allows you select, cut, copy, paste, save and open the DevTools on any website.
// @author               HL-Bo
// @match                *://*/**
// @exclude              *://vscode.dev/**
// @exclude              *://github.com/*/*/edit/**
// @exclude              *://gitee.com/*/*/edit/**
// @exclude              *://codeberg.org/*/*/_edit/**
// @exclude              *://www.figma.com/file/**
// @exclude              *://www.notion.so/**
// @exclude              *://outlook.live.com/**
// @exclude              *://mail.netease.com/**
// @exclude              *://mail.163.com/**
// @exclude              *://mail.126.com/**
// @exclude              *://www.yeah.net/**
// @exclude              *://mail.qq.com/**
// @exclude              *://uutool.cn/*
// @exclude              *://anytexteditor.com/*/online-notepad
// @icon                 data:image/png;base64,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
// @grant                none
// @run-at               document-start
// @downloadURL none
// ==/UserScript==

(function () {
    'use strict';
    console.info('Start the installation of user-script/remove-limits');

    // 尝试禁用 debugger
    // 仅在 eval('debugger') 或 setInterval('debugger', sec) 构造前执行才能阻止
    try {
        Function.prototype.__constructor_back = Function.prototype.constructor;
        Function.prototype.constructor = function () {
            if (arguments && typeof arguments[0] === 'string') {
                if ('debugger' === arguments[0]) {
                    console.debug('Disable an function which may execute debugger');
                    return;
                }
            }
            return Function.prototype.__constructor_back.apply(this, arguments);
        }
    } catch (error) { } finally { }

    let setEventListener = function (element, event_name, listener) {
        if (element.rl_events) {
            if (element.rl_events.has(event_name)) {
                element.removeEventListener(event_name, element.rl_events.get(event_name));
            }
        } else {
            element.rl_events = new Map();
        }
        element.rl_events.set(event_name, listener);
        element.addEventListener(event_name, listener);
    }
    let returnEventAllowed = function (event, event_name) {
        try {
            event.returnValue = true;
        } catch (error) { } finally { }
        if (event_name !== null) {
            console.debug(`Allow ${event_name}`);
        }
    };
    let allowEvent = function (element, event_name) {
        setEventListener(element, event_name, function (event) { returnEventAllowed(event, event_name); return true; });
    };
    let onKeyEvents = function (event) {
        let keyCode = event.keyCode || event.which || event.charCode;
        let ctrlKey = event.ctrlKey || event.metaKey;
        let shiftKey = event.shiftKey;
        if (ctrlKey && (keyCode == 65 || keyCode == 88 || keyCode == 67 || keyCode == 86 || keyCode == 83 || keyCode == 85)) {
            // Ctrl+A (select-all), Ctrl+X (cut), Ctrl+C (copy), Ctrl+V (paste), Ctrl+S (save), Ctrl+U (view-source)
            returnEventAllowed(event, 'hotkey');
        } else if (ctrlKey && shiftKey && (keyCode == 73 || keyCode == 74 || keyCode == 67)) {
            // Ctrl+Shift+I (devtools), Ctrl+Shift+J (console), Ctrl+Shift+C (elements)
            returnEventAllowed(event, 'hotkey (DevTools)');
        } else if (keyCode && keyCode == 123) { // F12
            returnEventAllowed(event, 'hotkey (F12)');
        }
        return true;
    };
    let allowKeyEvents = function (element, event_name) {
        setEventListener(element, event_name, onKeyEvents);
    };
    let allowElement = function (element) {
        try { element.oncopy = null; } catch (error) { } finally { allowEvent(element, 'copy'); }
        // 取消通过 JavaScript 实现的禁止文字选择
        try { element.onselectstart = null; } catch (error) { } finally { allowEvent(element, 'selectstart'); }
        // 取消通过 JavaScript 实现的禁止右键菜单
        try { element.oncontextmenu = null; } catch (error) { } finally { allowEvent(element, 'contextmenu'); }
        // 取消通过 JavaScript 实现的禁止剪切实现的禁止复制
        try { element.oncut = null; } catch (error) { } finally { allowEvent(element, 'cut'); }
        // 取消通过 JavaScript 实现的禁止粘贴
        try { element.onpaste = null; } catch (error) { } finally { allowEvent(element, 'paste'); }
        // 取消通过 CSS 实现的禁止选中
        try { element.style.webkitUserSelect = 'auto'; } catch (error) { } finally { } // Firefox
        try { element.style.userSelect = 'auto'; } catch (error) { } finally { } // Chrome
        // 取消通过 JavaScript 实现的禁用快捷键
        try { element.onkeypress = null; } catch (error) { } finally { allowKeyEvents(element, 'keypress'); }
        try { element.onkeydown = null; } catch (error) { } finally { allowKeyEvents(element, 'keydown'); }
        try { element.onkeyup = null; } catch (error) { } finally { allowKeyEvents(element, 'keyup'); }
        // 取消通过 JavaScript 实现的页面离开检测
        try { element.onvisibilitychange = null; } catch (error) { } finally { allowEvent(element, 'visibilitychange'); }
        try { element.onmouseout = null; } catch (error) { } finally { allowEvent(element, 'mouseout'); }
        try { element.onmouseleave = null; } catch (error) { } finally { allowEvent(element, 'mouseleave'); }
    }
    // let removeAllListeners = function (old_element) {
    //     let new_element = old_element.cloneNode(true);
    //     old_element.parentNode.replaceChild(new_element, old_element);
    // };
    let removeHiddenElements = function (element, recursion) {
        if (element.style.display == 'none' || element.style.visibility == 'hidden') {
            console.info(`Remove <${element.tagName} id='${element.id}' class='${element.className}' />`);
            element.remove();
        } else if (recursion) {
            for (let i = 0; i < element.children.length; i++) {
                removeHiddenElements(element.children.item(i), recursion);
            }
        }
    };
    let getMainContainerElement = function () {
        // 获取正文节点
        let main_container_element = null;
        if (document) {
            if (main_container_element === null) { // 检查 main 标签
                let elements = document.getElementsByTagName('main');
                if (elements.length > 0) { main_container_element = elements[0]; }
            }
            if (main_container_element === null) { // 检查 id='main' 的标签
                main_container_element = document.getElementById('main');
            }
            if (main_container_element === null) { // 检查 id='content' 的标签
                main_container_element = document.getElementById('content');
            }
            if (main_container_element === null) { // 检查 id='contents' 的标签
                main_container_element = document.getElementById('contents');
            }
            if (main_container_element === null) { // 检查 class='main' 的标签
                let elements = document.getElementsByClassName('main');
                if (elements.length > 0) { main_container_element = elements[0]; }
            }
            if (main_container_element === null) { // 检查 class='content' 的标签
                let elements = document.getElementsByClassName('content');
                if (elements.length > 0) { main_container_element = elements[0]; }
            }
            if (main_container_element === null) { // 检查 class='contents' 的标签
                let elements = document.getElementsByClassName('contents');
                if (elements.length > 0) { main_container_element = elements[0]; }
            }
        }
        return main_container_element;
    };

    // 对抗延迟运行（即在此脚本执行后运行）的禁用程序和循环执行的禁用程序，
    setInterval( // 每 0.2 秒执行一次。
        (function () {
            if (document) {
                try { allowElement(document); } catch (error) { } finally { }
            }
        }), 200
    );
    setInterval( // 每 0.3 秒执行一次。
        (function () {
            if (document) {
                try { allowElement(document.body); } catch (error) { } finally { }
            }
        }), 300
    );
    setInterval( // 每 0.5 秒执行一次。
        (function () {
            let mce = getMainContainerElement()
            if (document && mce) {
                try { allowElement(mce); } catch (error) { } finally { }
            }
        }), 500
    );

    // 对抗延迟运行（即在此脚本执行后运行）的混淆程序和循环执行的混淆程序，
    setTimeout(
        // 延迟 0.6 秒，有助于动态加载的内容的显示。
        function () {
            console.debug('Start scanning for hidden elements');
            setInterval(
                // 每 2 秒执行一次。
                function () {
                    if (document) {
                        // 移除正文中的不可见元素
                        try {
                            let mce = getMainContainerElement()
                            // 移除不可见元素
                            if (mce) {
                                removeHiddenElements(mce, true);
                            }
                        } catch (error) { } finally { }
                    }
                }, 2000
            );
        }, 600
    )

    console.debug('Complete the installation of user-script/remove-limits');
})();