// ==UserScript==
// @name         YouTube Video Speed & Seek Mouse Control
// @namespace    YPSSMC
// @version      4.0
// @description  Dynamically adjust video playback speed & seeking instantly with your mousewheel, no more need to go through player menus every time.
// @run-at       document-ready
// @include      http://www.youtube.com/* 
// @include      https://www.youtube.com/*
// @require      http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js
// @require      https://greasyfork.org/scripts/12284-jquery-mousewheel-3-1-13/code/jQuery%20Mousewheel%203113.js
// @require      https://greasyfork.org/scripts/14098-bililiterange-js/code/bililiteRangejs.js?version=88786
// @require      https://greasyfork.org/scripts/14097-jquery-simulate/code/jQuery%20Simulate.js?version=88785
// @require      https://greasyfork.org/scripts/14096-jquery-simulate-extended-plugin-1-3-0/code/jQuery%20Simulate%20Extended%20Plugin%20130.js?version=88784
// @require      https://greasyfork.org/scripts/14095-jquery-simulate-key-sequence-plugin-1-3-0/code/jQuery%20Simulate%20Key-Sequence%20Plugin%20130.js?version=88783
// @author       drhouse
// @icon         https://s.ytimg.com/yts/img/favicon-vfldLzJxy.ico
// ==/UserScript==

$(document).ready(function () {
    function getPlaybackRate() {
        var v = $('.video-stream')[0];
        return v.playbackRate;
    }

    var speed = getPlaybackRate().toFixed(2);
    var isShift = false;
    var isAlt = false;
    var ytplayer = document.getElementById("movie_player");

    $(ytplayer).prepend('<div id="rate">' + speed + ' </div>');
    $("#rate").css("z-index","999");
    $("#rate").css('position', 'absolute');
    $("#rate").css('top', '0');
    $("#rate").css('right', '0');

    function setPlaybackRate(r) {
        var v = $('.video-stream')[0];
        if (v === undefined || v.playbackRate === undefined) {
            setTimeout(function(){setPlaybackRate(r);}, 1000);
            return;
        }
        v.playbackRate = r;
    }

    $(window.document).mousewheel(function(e, deltaX) {
        //Seek | Shift+WheelUp/Down
        if (e.shiftKey) {
            if (deltaX>0) {
                if (location.href.toString().indexOf("embed") == -1) { //youtube.com
                    var ytplayer = document.getElementById("movie_player");
                    var time = ytplayer.getCurrentTime();
                    ytplayer.seekTo(time+5, true);
                }
                else{$('.video-stream').simulate("key-sequence", { sequence: "l" });} //embed
            } else {
                if (location.href.toString().indexOf("embed") == -1) { //youtube.com
                    var ytplayer = document.getElementById("movie_player");
                    var time = ytplayer.getCurrentTime();
                    ytplayer.seekTo(time-5, true);
                }
                else{$('.video-stream').simulate("key-sequence", { sequence: "j" });} //embed
            }
            e.preventDefault();
        }

        //Speed | Alt+WheelUp/Down
        if (e.altKey) {
            var step = 0.25;
            if (e.deltaY<0) {         
                var speed = Math.max(0.0,(getPlaybackRate()-step).toFixed(2));
                setPlaybackRate(speed);
            } else { 
                var speed = Math.min(8,(getPlaybackRate()+step).toFixed(2));
                setPlaybackRate(speed);
            }
            e.preventDefault();
            $("#rate").remove();
            var speed = speed.toFixed(2);
            var ytplayer = document.getElementById("movie_player");
            $(ytplayer).prepend('<div id="rate">' + speed + ' </div>');
            $("#rate").css("z-index","999");
            $("#rate").css('position', 'absolute');
            $("#rate").css('top', '0');
            $("#rate").css('right', '0');

        }
    });
})