优化雨课堂使用体验
目前為
// ==UserScript==
// @name Rain Classroom Helper
// @namespace https://raineggplant.com/
// @version 0.1
// @description 优化雨课堂使用体验
// @author RainEggplant
// @match *://www.yuketang.cn/web*
// @grant GM_addStyle
// @require https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js
// @homepageURL https://github.com/RainEggplant/rain-classroom-helper
// ==/UserScript==
(function () {
'use strict';
const DEBUG = false;
// 调整左边栏样式
GM_addStyle(`
.panel {
padding-top: 34px !important;
}
.nav-list {
font-size: 18px !important;
}
.nav-item {
height: 50px !important;
line-height: 32px !important;
}
.kecheng, .kejian, .shiti, .geren, .addlink {
width: 32px !important;
}
.left .contact-us {
display: block !important;
}
`);
// 调整右边栏样式
GM_addStyle(`
.right {
width: 300px !important;
}
.control-panel {
padding-top: 32px !important;
}
.title {
font-size: 22px !important;
}
.page-nav-control {
width: 300px !important;
}
.page-control {
padding-top: 15px !important;
}
.page-nav {
padding: unset !important;
font-size: 18px !important;
}
.kecheng, .kejian, .shiti, .geren, .addlink {
width: 32px !important;
}
.print-preview-box {
margin: 0px 0 0 !important;
}
.contact-us {
display: none;
}
`);
// 调整中间 iframe 为自适应宽度
GM_addStyle(`
.wrapper-inner {
width: 92% !important;
}
.center {
width: auto !important;
margin-left: 180px !important;
margin-right: 300px !important;
float: none !important;
}
.rain-iframe {
width: calc(100% - 50px) !important;
}
`);
// 调整布局
waitForKeyElements('div.index-view.none.J_index', function () {
// note: you must move div.right instead of div.center, or the sidebar
// will lost its funtion
$('div.right.fr').insertBefore($('div.center.fl'));
});
// 缩小 “体验新版” 尺寸
waitForKeyElements('a.newWebEntry', function () {
$('a.newWebEntry')
.find('img')
.attr('style', 'width: 150px; margin-top: 20px;');
});
// 添加右边栏视频框
GM_addStyle(`
#video-iframe {
width: 300px;
height: 285px;
margin-top: 20px;
}
`);
waitForKeyElements('div.control-panel.Absolute-Center', function () {
const videoIFrame = '<iframe id="video-iframe" src="about:blank" style="display: none;"/>';
$('div.page-control.J_pageNo').after(videoIFrame);
});
// 添加 GitHub 项目图标
waitForKeyElements('ul.nav-list', function () {
const liAbout = `
<li class="nav-item clearfix J_nav">
<a href="https://github.com/RainEggplant" target="_blank">
<img alt="GitHub stars" style="width:auto;" src="https://img.shields.io/github/stars/RainEggplant/rain-classroom-helper?style=social">
</a>
</li>
`;
$('ul.nav-list').append(liAbout);
});
// 中间 iframe 加载出内容后绑定处理视频的函数
waitForKeyElements('body', addVideoHandler, true, '#rainiframe');
// 启动将课件中视频提到右边栏播放的处理函数
function startObservation() {
const rainIFrame = document.getElementById('rainiframe').contentWindow
.document.body;
let iframeUrl = '';
let isVideoLoaded = false;
const observer = new MutationObserver(function () {
// change in #rainiframe detected
DEBUG && console.log('change in #rainiframe detected');
const newIFrameUrl = $('#rainiframe').contents().get(0).location.href;
const videoSection = rainIFrame.querySelector('section.live__wrap');
if (videoSection) {
// 存在视频
// 去除中央 rainIFrame 中的视频
$(videoSection).attr('style', 'display: none;');
$(videoSection).contents().find('video').removeAttr('src');
$(videoSection).empty();
if (newIFrameUrl === iframeUrl) return;
// 在右边栏显示视频
// note: 不要使用 $("#video-iframe").attr("src", iframeUrl);
// 因为这样会留下访问记录，从而使后退、前进功能异常
iframeUrl = newIFrameUrl;
const videoIFrame = $('#video-iframe')[0];
videoIFrame.contentWindow.location.replace(iframeUrl);
$('#video-iframe').css({ display: 'block' });
isVideoLoaded = true;
} else {
if (isVideoLoaded) {
// 退出视频课程时停止播放并隐藏右边栏视频
$('#video-iframe').css({ display: 'none' });
iframeUrl = newIFrameUrl;
// DO NOT USE: $("#video-iframe").attr("src", "/v/index");
const videoIFrame = $('#video-iframe')[0];
videoIFrame.contentWindow.location.replace('about:blank');
isVideoLoaded = false;
}
}
});
const config = { childList: true, subtree: true };
observer.observe(rainIFrame, config);
DEBUG && console.log('Observation started');
}
function addVideoHandler() {
// 首次进入或通过左边栏改变页面时
$('#rainiframe').on('load', function () {
DEBUG && console.log('#rainiframe has (re)loaded');
// 右边栏视频停止播放并隐藏
$('#video-iframe').css({ display: 'none' });
const videoIFrame = $('#video-iframe')[0];
videoIFrame.contentWindow.location.replace('about:blank');
startObservation();
});
}
// ==== DO NOT MODIFY
// ==== third-party utility functions:
/*--- waitForKeyElements(): A utility function, for Greasemonkey scripts,
that detects and handles AJAXed content.
IMPORTANT: This function requires your script to have loaded jQuery.
*/
function waitForKeyElements(
selectorTxt, /* Required: The jQuery selector string that
specifies the desired element(s).
*/
actionFunction, /* Required: The code to run when elements are
found. It is passed a jNode to the matched
element.
*/
bWaitOnce, /* Optional: If false, will continue to scan for
new elements even after the first match is
found.
*/
iframeSelector /* Optional: If set, identifies the iframe to
search.
*/
) {
var targetNodes, btargetsFound;
if (typeof iframeSelector == 'undefined')
targetNodes = $(selectorTxt);
else
targetNodes = $(iframeSelector).contents()
.find(selectorTxt);
if (targetNodes && targetNodes.length > 0) {
btargetsFound = true;
/*--- Found target node(s). Go through each and act if they
are new.
*/
targetNodes.each(function () {
var jThis = $(this);
var alreadyFound = jThis.data('alreadyFound') || false;
if (!alreadyFound) {
//--- Call the payload function.
var cancelFound = actionFunction(jThis);
if (cancelFound)
btargetsFound = false;
else
jThis.data('alreadyFound', true);
}
});
}
else {
btargetsFound = false;
}
//--- Get the timer-control variable for this selector.
var controlObj = waitForKeyElements.controlObj || {};
var controlKey = selectorTxt.replace(/[^\w]/g, '_');
var timeControl = controlObj[controlKey];
//--- Now set or clear the timer as appropriate.
if (btargetsFound && bWaitOnce && timeControl) {
//--- The only condition where we need to clear the timer.
clearInterval(timeControl);
delete controlObj[controlKey];
}
else {
//--- Set a timer, if needed.
if (!timeControl) {
timeControl = setInterval(function () {
waitForKeyElements(selectorTxt,
actionFunction,
bWaitOnce,
iframeSelector
);
},
300
);
controlObj[controlKey] = timeControl;
}
}
waitForKeyElements.controlObj = controlObj;
}
})();