// ==UserScript==
// @name Rain Classroom Helper
// @namespace https://raineggplant.com/
// @version 0.2.4
// @description 优化雨课堂使用体验
// @author RainEggplant
// @match *://www.yuketang.cn/web*
// @match *://pro.yuketang.cn/web*
// @match *://changjiang.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(`
.left .panel {
padding-top: 34px !important;
max-height: unset !important;
}
.nav-list {
font-size: 18px !important;
}
.nav-item {
height: 45px !important;
line-height: 32px !important;
padding-top: 6px !important;
}
.kecheng, .kejian, .shiti, .geren, .addlink {
width: 30px !important;
}
.left .panel .nav-list .nav-item .name {
padding-left: 18px !important;
}
`);
// 调整右边栏样式
GM_addStyle(`
.right {
width: 320px !important;
}
.right .control-panel {
padding-top: 32px !important;
max-height: unset !important;
}
.title {
font-size: 22px !important;
}
.page-nav-control {
width: 320px !important;
}
.page-control {
padding-top: 15px !important;
}
.control-desc {
display: none !important;
}
.page-nav {
padding: unset !important;
font-size: 18px !important;
}
.print-preview-box {
margin: 0px 0 0 !important;
}
.contact-us {
display: none;
}
.right .control-panel .page-control .paging-number-list .page-no:nth-child(5n) {
margin: 0 14px 13px 0 !important;
}
`);
// 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: 320px !important;
float: none !important;
}
.center .rain-iframe {
width: calc(95% - 40px) !important;
height: 95% !important;
}
.student__timeline-wrapper {
top: 2.33rem !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: 320px;
height: 304px;
}
`);
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/rain-classroom-helper" 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);
});
waitForKeyElements('div.left.fl', function () {
const divLeftHidden = `
<div id="left-hidden" class="fl" style="display: none;">
<p id="show-left" style="top: 50%; position: absolute; color: #fff; z-index: 1;">▶</p>
</div>
`;
$('div.left.fl').before(divLeftHidden);
$('#show-left').on('click', showLeftPanel);
});
// 添加控制样式的滑块
waitForKeyElements('div.panel.Absolute-Center', function () {
const panelWidthControls = `
<div style="margin-top: 20px; color: #fff; font-size: 14px;">
<p>
<label for="panel-width">右边栏宽度</label>
<input type="range" id="right-panel-width" value="320" min="200" max="576" style="width: 160px;">
</p>
<p>
<label for="panel-width">全屏占比</label>
<input type="range" id="content-width" value="92" min="50" max="98" style="width: 160px;">
</p>
<p>
<button id="hide-left" type="button" style="color: #000; font-size: 12px;">◀ 隐藏左边栏</button>
</p>
</div>
`;
$('div.panel.Absolute-Center').append(panelWidthControls);
$('#right-panel-width').on('change', setRightPanelWidth);
$('#content-width').on('change', setContentWidth);
$('#hide-left').on('click', hideLeftPanel);
});
function setRightPanelWidth() {
const width = 'width: ' + $(this).val() + 'px !important;';
const height = 'height: ' + (0.75 * $(this).val() + 60) + 'px !important;';
const marginLeft = 'margin-left: ' + $('div.center.fl').css('margin-left') + ';';
const marginRight = 'margin-right: ' + $(this).val() + 'px !important;';
const iframeDisplay = 'display: ' + $('#video-iframe').css('display') + ';';
$('div.right.fr').attr('style', width);
$('div.page-nav-control').attr('style', width);
$('div.center.fl').attr('style', marginLeft + ' ' + marginRight);
$('#video-iframe').attr('style', width + ' ' + height + ' ' + iframeDisplay);
}
function setContentWidth() {
const width = 'width: ' + $(this).val() + '% !important;';
$('div.wrapper-inner.clearfix.J_inner').attr('style', width);
}
function hideLeftPanel() {
const marginLeft = 'margin-left: 0px !important;';
const marginRight = 'margin-right: '
+ $('div.center.fl').css('margin-right') + ' !important;';
$('div.left.fl').css('display', 'none');
$('div.center.fl').attr('style', marginLeft + ' ' + marginRight);
$('#left-hidden').css('display', 'block');
}
function showLeftPanel() {
const marginLeft = 'margin-left: 180px !important;';
const marginRight = 'margin-right: '
+ $('div.center.fl').css('margin-right') + ' !important;';
$('div.left.fl').css('display', 'block');
$('div.center.fl').attr('style', marginLeft + ' ' + marginRight);
$('#left-hidden').css('display', 'none');
}
waitForKeyElements('body', function () {
// 中间 iframe 加载出内容后绑定处理视频的函数
addVideoHandler();
}, true, '#rainiframe');
function addVideoHandler() {
// 首次进入或通过左边栏改变页面时
let iframeUrl = '';
let isVideoLoaded = false;
let iframeBody = $('#rainiframe').contents().find('body')[0];
const iframeObserver = new MutationObserver(function () {
DEBUG && console.log('iframe mutated');
const newIFrameUrl = $('#rainiframe').contents()[0].location.href;
DEBUG && console.log(newIFrameUrl);
const videoSection = iframeBody.querySelector('section.live__wrap');
if (videoSection) {
// 存在视频
// 去除中央 rainIFrame 中的视频
$(videoSection).contents().find('video').removeAttr('src');
$(videoSection).empty();
if (iframeUrl && newIFrameUrl.includes(iframeUrl)) {
DEBUG && console.log('entering a sub page');
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' });
// 去除视频框中无关元素
waitForKeyElements('.live__view', function () {
const liveView = $('#video-iframe').contents().find('.live__view');
// liveView.children('section.live__wrap').css('padding-top', '0px');
liveView.children(':not(.live__wrap)').remove();
const observer = new MutationObserver(function (mutations) {
mutations.forEach(function (mutation) {
if (mutation.type === 'childList' && mutation.addedNodes.length > 0) {
liveView.children(':not(.live__wrap)').remove();
}
});
});
observer.observe(liveView[0], { childList: true });
}, true, '#video-iframe');
isVideoLoaded = true;
} else {
if (isVideoLoaded && !(iframeUrl && newIFrameUrl.includes(iframeUrl))) {
// 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 };
iframeObserver.observe(iframeBody, config);
DEBUG && console.log('observation started');
// 在 iframe 被重新加载（点击左侧导航栏、进入直播）时，重新添加 handler
$('#rainiframe')[0].contentWindow.addEventListener('unload', () => {
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');
$('#rainiframe').contents().empty();
waitForKeyElements('body', function () {
addVideoHandler();
}, true, '#rainiframe');
});
}
// ==== 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;
}
})();
