解放双手，自动播放
当前为
// ==UserScript==
// @name 学堂在线小助手注释版
// @version 0.0.8.2
// @description 解放双手，自动播放
// @author 1xin
// @require http://code.jquery.com/jquery-latest.js
// @noframes
// @match *://*.xuetangx.com/courses/*/courseware/*
// @grant GM_addStyle
// @grant GM.getValue
// @namespace https://greasyfork.org/users/183871
// ==/UserScript==
(function() {
'use strict';
GM_addStyle('#next_video_btn{color:#fa7d3c;}');
//获取下一个视频地址
//getUrl()获取下一个视频地址
var getNextVideoUrl = {
getUrl:function(){
var next_video,next_video_url,next_unit,next_unit_ul;
var active_video=$("li.active ");
if (active_video.next().length > 0 ) {
next_video=active_video.next().find("a");
next_video_url=next_video.attr('href');
}else{
next_unit=$("div.chapter.is-open").next();
if(next_unit.length>0){
next_unit_ul=next_unit.find('ul').children(":first").find("a");
next_video_url=next_unit_ul.attr('href');
}else{
return false;
}
}
return next_video_url;
}
};
//增加下一个按钮，防止程序出错
//addNextButton()增加下一个视频按钮
//toNextButton()转到下一个视频地址
//addTips()提示信息
var addNextButton={
addButton:function(next_video_url){
var next_btn_html = '';
next_btn_html +='<li class="video-tracks video-download-button">';
next_btn_html += '<a href="';
next_btn_html +=next_video_url;
next_btn_html += '">';
next_btn_html += '跳转到下一个视频';
next_btn_html += '</a>';
next_btn_html +='</li>';
//增加下一个视频按钮
var ul_tag = $("ul.wrapper-downloads");
if (ul_tag) {
ul_tag.append(next_btn_html);
}
},
toNextButton:function(){
if(getNextVideoUrl.getUrl()!=false){
window.location.href=getNextVideoUrl.getUrl();
}else{
return 0;
}
},
addTips:function(){
var li_tag = $("ul.wrapper-downloads");
var tips_button = '';
tips_button += '<li class="video-tracks video-download-button">';
tips_button += '<a>';
tips_button += '<font color="red">';
tips_button += '再次强调：答题时请关掉脚本！！';
tips_button += '</font>';
tips_button += '</a>';
tips_button += '</li>';
if (li_tag) {
li_tag.append(tips_button);
}
},
addVersion:function(){
var li_tag = $("ul.wrapper-downloads");
var tips_Version = '';
tips_Version += '<li class="video-tracks video-download-button">';
tips_Version += '<a>';
tips_Version += '<font color="blue">';
tips_Version += '版本0.0.8.2';
tips_Version += '</font>';
tips_Version += '</a>';
tips_Version += '</li>';
if (li_tag) {
li_tag.append(tips_Version);
}
}
};
//视频播放
//myVideo video DOM 对象
//playVideo() 自动播放
//stopVideo() 监测是否结束，到下一个视频
//isVideoPage() 是否是视频页
//VideoQuality() 自动切换到低清，节省流量
//changeVideoSpeed() 自动二倍速播放，节省时间
//changeVideoVolume() 自动静音，节省……耳朵？
var autoPlayVideo={
myVideo:null,
playVideo:function(){
setTimeout(function(){
var m=autoPlayVideo.isVideoPage();
//alert(m);
if(m){
try
{
autoPlayVideo.myVideo = document.getElementsByTagName('video')[0];
//autoPlayVideo.myVideo.play();
autoPlayVideo.changeVideoQuality();
autoPlayVideo.changeVideoSpeed();
autoPlayVideo.changeVideoVolume();
autoPlayVideo.stopVideo();
}
catch(e)
{
//location.reload();
autoPlayVideo.myVideo.play();
}
}else{
addNextButton.toNextButton();
}
},2000);
},
stopVideo:function(){
this.myVideo.addEventListener('ended',function(){
//alert('stop');
addNextButton.toNextButton();
});
},
isVideoPage:function(){
if(document.getElementsByTagName('video').length > 0){
return true;
}else{
return false;
}
},
changeVideoQuality:function(){
var qualityDiv=$("div.xt_video_player_quality.xt_video_player_common.fr>ul");
var qualityButton=qualityDiv.children(":last");
qualityButton.trigger("click");
},
changeVideoSpeed:function(){
var speedDiv=$("div.xt_video_player_speed.xt_video_player_common.fr>ul");
var speedButton=speedDiv.children(":first");
speedButton.trigger("click");
},
changeVideoVolume:function(){
var VolumeDiv=$("div.xt_video_player_volume");
var VolumeButton=VolumeDiv.children(":first");
VolumeButton.trigger("click");
}
};
autoPlayVideo.playVideo();
var t=getNextVideoUrl.getUrl();
addNextButton.addButton(t);
addNextButton.addTips();
addNextButton.addVersion();
})();