// ==UserScript==
// @name           Yandex视频横屏插件
// @name:en        Yandex Video Player Horizontal Screen Plug-in
// @description    移动端Yandex浏览器看视频全屏时强制为横屏观看(安卓已经过测试运行，ios并未测试)
// @description:en Yandex browser is set to play horizontally when viewing full-screen video. This is for Android, and IOS is not tested.
// @version        1.1.1
// @author         Xavier
// @namespace      https://greasyfork.org/zh-CN/users/128493
// @match          *://*/*
// @grant          none
// @run-at         document-end
// @note           更新日志:1.添加竖屏模式。有些视频更适宜在竖屏状态下观看，全屏状态下，手机竖直摆放时会重新回到竖屏模式。2.添加双击全屏功能。一些网站全屏按钮无法使视频进入全屏模式(例如m.bilibili.com)，新增在视频播放状态下，双击全屏(支持双击退出全屏)。该功能需要关闭yandex浏览器的"忽略网站的禁止字体缩放请求"功能，不关闭双击会缩放网页。
// @downloadURL none
// ==/UserScript==
(function() {
    'use strict';
    var videoEle=document.getElementsByTagName("video");
    var videoplay=null,vi=0,vClick=0;

    function setVideo(e){videoplay=this;}

    function getVideoPlay() {
        if(videoEle.length>0){
            for(vi=0;vi<videoEle.length;vi++){
                videoEle[vi].addEventListener("play",setVideo,false);
            }
            document.body.removeEventListener("click",getVideoPlay, false);
        }else{
            if(vClick<3){vClick++;}
            else{
                document.body.removeEventListener("click",getVideoPlay, false);
                document.body.removeEventListener("dblclick",dblfull, false);
                document.removeEventListener("webkitfullscreenchange",fullchange,false);
            }
        }
    }

    function dblfull(){
        if(videoplay!=null){
            if(document.webkitFullscreenElement){
                videoplay.webkitExitFullscreen();
            }else{
                videoplay.webkitRequestFullScreen();
            }
        }
    }

    document.body.addEventListener("click",getVideoPlay,false);
    document.body.addEventListener("dblclick",dblfull,false);

    var oriHway="landscape-primary";
    var oriHtemp="",oriHgamma=0,oriHbeta=0;

    function orientationHandler(event) {
        oriHgamma=Math.round(event.gamma);
        oriHbeta=Math.abs(Math.round(event.beta));
        if(event.beta>60 && event.beta<120){
            oriHtemp="portrait-primary";
        }else if((oriHbeta<35 && Math.abs(oriHgamma)>30) || (oriHbeta>145 && Math.abs(oriHgamma)>30)){
            oriHtemp=((oriHgamma>30 && oriHbeta<35) || (oriHgamma<-30 && oriHbeta>145)) ? "landscape-secondary" : "landscape-primary";
        }
        if(oriHway!=oriHtemp){
            oriHway=oriHtemp;
            screen.orientation.lock(oriHway);
        }
    }

    function fullchange(){
        try{
            if(document.webkitFullscreenElement){
                screen.orientation.lock(oriHway);
                window.addEventListener("deviceorientation", orientationHandler, false);
            }else{
                window.removeEventListener("deviceorientation", orientationHandler, false);
            }
        }
        catch (e) {
            alert("Your browser does not support this script !");
        }
    }

    document.addEventListener("webkitfullscreenchange",fullchange,false);

})();