// ==UserScript==
// @name              Remove Restrictions and Restore Default Behavior
// @name:zh-CN        解除网页限制，恢复默认行为
// @namespace         http://hl-bo.github.io/namespaces/user-script/remove-limits
// @version           1.0
// @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。
// @author            HL-Bo
// @match             *://*/*
// @exclude           *://vscode.dev/*
// @icon              data:image/png;base64,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
// @grant             none
// @run-at            document-start
// @downloadURL none
// ==/UserScript==

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

// let removeAllListeners = function (old_element) {
//     let new_element = old_element.cloneNode(true);
//     old_element.parentNode.replaceChild(new_element, old_element);
// };

setInterval(
    // 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，
    // 每 0.3 秒执行一次。
    // 参见 https://developer.mozilla.org/zh-CN/docs/Web/API/setInterval
    (function() {
        'use strict';
        if (document) {
            let setEventAllowed = function (event, event_name) {
                event.returnValue = true;
                if (event_name !== null) {
                    console.debug(`Allowed ${event_name}`);
                }
            };
            let allowEvent = function (event_name) {
                document.addEventListener(event_name, function(event){ setEventAllowed(event, event_name); });
            };
            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)
                    setEventAllowed(event, "hotkey");
                } else if (ctrlKey && shiftKey && (keyCode == 73 || keyCode == 74 || keyCode == 67)) {
                    // Ctrl+Shift+I (devtools), Ctrl+Shift+J (console), Ctrl+Shift+C (elements)
                    setEventAllowed(event, "hotkey (DevTools)");
                } else if (keyCode && keyCode == 123) { // F12
                    setEventAllowed(event, "hotkey (F12)");
                }
            };
            let allowKeyEvents = function (event_name) {
                document.addEventListener(event_name, onKeyEvents);
            };
            // 取消通过 JavaScript 实现的禁止复制
            try { document.oncopy = null; document.body.oncopy = null; } catch (error) { allowEvent("copy"); }
            // 取消通过 JavaScript 实现的禁止文字选择
            try { document.onselectstart = null; document.body.onselectstart = null; } catch (error) { allowEvent("selectstart"); }
            // 取消通过 JavaScript 实现的禁止右键菜单
            try { document.oncontextmenu = null; document.body.oncontextmenu = null; } catch (error) { allowEvent("contextmenu"); }
            // 取消通过 JavaScript 实现的禁止剪切实现的禁止复制
            try { document.oncut = null; document.body.oncut = null; } catch (error) { allowEvent("cut"); }
            // 取消通过 JavaScript 实现的禁止粘贴
            try { document.onpaste = null; document.body.onpaste = null; } catch (error) { allowEvent("paste"); }
            // 取消通过 CSS 实现的禁止选中
            try { document.style.webkitUserSelect = "auto"; document.body.style.webkitUserSelect = "auto"; } catch (error) {} // Firefox
            try { document.style.userSelect = "auto"; document.body.style.userSelect = "auto"; } catch (error) {} // Chrome
            // 取消通过 JavaScript 实现的禁用快捷键
            try { document.onkeypress = null; document.body.onkeypress = null; } catch (error) { allowKeyEvents("keypress"); }
            try { document.onkeydown = null; document.body.onkeydown = null; } catch (error) { allowKeyEvents("keydown"); }
            try { document.onkeyup = null; document.body.onkeyup = null; } catch (error) { allowKeyEvents("keyup"); }
            // 取消通过 JavaScript 实现的页面离开检测
            try { document.onvisibilitychange = null; document.body.onvisibilitychange = null; } catch (error) { allowEvent("visibilitychange"); }
        }
    }), 300
);

setInterval(
    // 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，
    // 每 2.1 秒执行一次。
    function() {
        'use strict';
        if (document) {
            let removeHiddenElements = function (element, recursion) {
                if (element.style.display == "none" || element.style.visibility == "hidden") {
                    element.remove();
                } else if (recursion) {
                    for (let i = 0; i < element.children.length; i++) {
                        removeHiddenElements(element.children.item(i), recursion);
                    }
                }
            };
            // 移除正文中的不可见元素
            try {
                // 获取正文节点
                let content_element = document.getElementById("content");
                if (content_element === null) { // 不存在 id="content" 的元素
                    content_element = document.getElementById("contents");
                }
                if (content_element === null) { // 不存在 id="contents" 的元素
                    let content_elements = document.getElementsByClassName("content");
                    if (content_elements.length > 0) {
                        content_element = content_elements[0];
                    }
                }
                if (content_element === null) { // 不存在 class="content" 的元素
                    let content_elements = document.getElementsByClassName("contents");
                    if (content_elements.length > 0) {
                        content_element = content_elements[0];
                    }
                }
                // 移除不可见元素
                if (content_element !== null) {
                    removeHiddenElements(content_element, true);
                }
            } catch (error) {}
        }
    }, 2100
);