EnablePIP-acfun

Enable Picture in Picture mode in acfun 在acfun中打开画中画模式，使chrome能够使用画中画。

Ekde 2020/02/23. Vidu La ĝisdata versio. 

// ==UserScript==
// @name         EnablePIP-acfun
// @namespace    EnablePIP
// @version      2.1.0
// @description  Enable Picture in Picture mode in acfun 在acfun中打开画中画模式，使chrome能够使用画中画。
// @author       LXG_Shadow & XenoAmess
// @match        https://www.icourse163.org/*
// @run-at       document-end
// @grant        none
// ==/UserScript==

var REFRESH_TIME = 500;
var STRING_OPEN_PICTURE_IN_PICTURE = "显示画中画面板";
var STRING_CLOSE_PICTURE_IN_PICTURE = "隐藏画中画面板";

var STRING_POPUP_MENU_SELECTOR = "div.container-plugins-inner > ul.context-menu";
var STRING_CONTROL_BAR_SELECTOR = "div.container-controls";
var STRING_VIDEO_SELECTOR = "video";
var STRING_PIC_IN_PIC_SWITCH = "pictureInPictureSwitch";

var b_pipMode = false;

function switchPictureInPictureMode() {
    if (b_pipMode) {
        $("video").removeAttr("controls");
        $(STRING_CONTROL_BAR_SELECTOR).css("z-index", "");
        $(STRING_VIDEO_SELECTOR).css("z-index", "");
    } else {
        $("video").attr("controls", "controls");
        $(STRING_CONTROL_BAR_SELECTOR).css("z-index", "-1");
        $(STRING_VIDEO_SELECTOR).css("z-index", "10");
    }
    b_pipMode = !b_pipMode;
    $("#" + STRING_PIC_IN_PIC_SWITCH).text(b_pipMode ? STRING_CLOSE_PICTURE_IN_PICTURE : STRING_OPEN_PICTURE_IN_PICTURE);
}

function addToToolBar() {
    if ($(STRING_POPUP_MENU_SELECTOR) != null && document.getElementById(STRING_PIC_IN_PIC_SWITCH) === null) {
        var $il0 = $("<li></li>");
        $il0.text(b_pipMode ? STRING_CLOSE_PICTURE_IN_PICTURE : STRING_OPEN_PICTURE_IN_PICTURE);
        $il0.attr("id", STRING_PIC_IN_PIC_SWITCH);
        $il0.click(switchPictureInPictureMode);
        $(STRING_POPUP_MENU_SELECTOR).append($il0);
    }
}

(function () {
    'use strict';
    if (!window.jQuery) {
        var oScript = document.createElement('script');
        oScript.type = "text/javascript";
        oScript.src = "//s1.hdslb.com/bfs/static/jinkela/long/js/jquery/jquery1.7.2.min.js";
        document.head.appendChild(oScript);
    }
    window.onload = window.setInterval(addToToolBar, REFRESH_TIME);
})();