Youtube player control keys FIX.

Fix player controls Space, Left, Right, Up, Down to behave consistently after page load or clicking individual controls. Not focusing the mute button anymore.

目前为 2018-02-18 提交的版本。查看最新版本。

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// ==UserScript==
// @name         Youtube player control keys FIX.
// @namespace    https://github.com/GregHerendi
// @version      1.0
// @description  Fix player controls Space, Left, Right, Up, Down to behave consistently after page load or clicking individual controls. Not focusing the mute button anymore.
// @author       Greg Herendi
// @license      MIT
// @match        https://www.youtube.com/watch*
// @match        http://www.youtube.com/watch*
// @match        https://youtube.com/watch*
// @match        http://youtube.com/watch*
// @grant        none
// @require      http://code.jquery.com/jquery-latest.js
// ==/UserScript==
/*
Youtube player controls will work consistently after page load and after clicking controls:
- Space (play/pause), F (fullscreen), M (mute), Left (jump backwards), Right (jump forwards), Up (volume up), Down (volume down)

Click outside movie frame to get standard page controls: Space (page down), Up, Down, Left, Right (scroll)

Fixes the following awkward behaviour of Youtube player controls after clicking them (making the individual control focused):
- after clicking the mute button Space toggles mute instead of pausing
- after clicking the volume slider Left-Right will change the volume instead of stepping the video.
- after clicking subtitle button Space will toggle subtitles
- after clicking settings button Space will toggle settings
*/

(function() {
    'use strict';

    // Movie player frame (element) is focused after loading the page to get movie player keyboard controls.
    document.getElementById('movie_player').focus();
    
    function onFocus(event) {
        // Called when a sub-element of the player gets focus (by clicking or TAB). 
        var playerElem= document.getElementById('movie_player');
        // avoid infinite recursion of playerElem.focus() -> onFocus()
        if  (event.target == playerElem)  return;
        //console.log(event.type + ' ->', event.target);
        // Focus the player to have proper keyboard controls
        playerElem.focus();
    }

    // '.ytp-chrome-bottom' has all the controls that should delegate focus to the player instead of getting focused themselves
    $('#movie_player .ytp-chrome-bottom').on('focusin', onFocus);
    // If there are other controls outside '.ytp-chrome-bottom', use the following instead:
    //$('#movie_player').on('focusin', onFocus);
})();

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