// ==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        1.2.1
// @author         Xavier
// @namespace      https://greasyfork.org/zh-CN/users/128493
// @match          *://*/*
// @grant          none
// @run-at         document-end
// @note           功能说明:1.全屏下强制为横屏观看，支持重力感应切换方向(需要设备支持)。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。3.竖屏模式。有些视频更适宜在竖屏状态下观看，新增摇一摇切换竖屏，再次摇一摇换回横屏(需要设备支持)。
// @downloadURL none
// ==/UserScript==
(function() {
    'use strict';
    var oriHway="landscape-primary",oriHgamma=0,oriHbeta=0;
    var isLock=true;

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

   var SHAKE_THRESHOLD = 18000;//摇一摇灵敏度，越小越灵敏
   var last_update = 0,diffTime=0,speed=0;
   var x=0, y=0, z=0, last_x = 0, last_y = 0, last_z = 0;
   var acceleration=null,curTime=null;

   function deviceMotionHandler(eventData) {
       acceleration =eventData.accelerationIncludingGravity;
       curTime = new Date().getTime();
       if ((curTime-last_update)> 10) {
           diffTime = curTime -last_update;
           last_update = curTime;
           x = acceleration.x;
           y = acceleration.y;
           z = acceleration.z;
           speed = Math.abs(x +y + z - last_x - last_y - last_z) / diffTime * 10000;
           if (speed > SHAKE_THRESHOLD) {
               if(isLock){
                   screen.orientation.lock("portrait-primary");
                   window.removeEventListener('devicemotion',deviceMotionHandler,false);
                   isLock=false;
               }
               else{
                   screen.orientation.lock(oriHway);
                   window.removeEventListener('devicemotion',deviceMotionHandler,false);
                   isLock=true;
               }
               setTimeout(window.addEventListener('devicemotion',deviceMotionHandler,false),1000);
           }
           last_x = x;
           last_y = y;
           last_z = z;
        }
    }

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

    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);
            }
            if (window.DeviceOrientationEvent) {window.addEventListener("deviceorientation", orientationHandler, false);}
            else{screen.orientation.lock(oriHway);}
            document.body.addEventListener("dblclick",dblfull,false);
            if (window.DeviceMotionEvent) {window.addEventListener('devicemotion',deviceMotionHandler,false);}
            document.body.removeEventListener("click",getVideoPlay, false);
        }else{
            if(vClick<3){vClick++;}
            else{document.body.removeEventListener("click",getVideoPlay, false);}
        }
    }

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

})();