// ==UserScript==// @name        Youtube Space=Pause// @namespace   s4nji// @author      s4nji// @description Pressing space when watching a video on Youtube will always pause the video instead of functioning like Page Down key.// @license     CC0// @include     https://www.youtube.com/watch*// @version     2// @grant       none// ==/UserScript==/* - - - - - *\* Variables *\* - - - - - */var inputFocus = false;var debug = false;/* - - - - - - - - - *\* Utility Functions *\* - - - - - - - - - */// Debug Console Loggingfunction clog(msg) {if (debug) {console.log("YtS=P | "+msg);}}// Run codes "unsafely"function contentEval(source) {"use strict";// Check for function input.if ('function' === typeof source) {// Execute this function with no arguments, by adding parentheses.// One set around the function, required for valid syntax, and a// second empty set calls the surrounded function.source = '(' + source + ')();';}// Create a script node holding this  source code.var script = document.createElement('script');script.setAttribute("type", "application/javascript");script.textContent = source;// Insert the script node into the page, so it will run, and immediately// remove it to clean up.document.body.appendChild(script);document.body.removeChild(script);}// Set inputFocus to true if an input box is on focusfunction setInputFocus(bool) {"use strict";return function() {if ( typeof bool === "boolean" ) {inputFocus = bool;clog("inputFocus = " + inputFocus);}};}// Add Event Listenersfunction hookInputFocus() {"use strict";var inputs = document.querySelectorAll("input"), i;for (i=0; i<inputs.length; i+=1) {inputs[i].addEventListener('focus', setInputFocus(true));inputs[i].addEventListener('blur', setInputFocus(false));clog("hooked "+i+"!");}}/* - - - - - - - *\* Main Function *\* - - - - - - - */function main() {"use strict";document.body.addEventListener('keydown', function(event) {clog("inputFocus == " + inputFocus);if (event.keyCode === 32 && !inputFocus) {event.preventDefault();var status = document.querySelector("#movie_player").getPlayerState();if ( status === 1 || status === 3 ) {contentEval('document.querySelector("#movie_player").pauseVideo();');} else if ( status === 2 || status === 0 ) {contentEval('document.querySelector("#movie_player").playVideo();');}// N/A (-4), unstarted (-1), ended (0), playing (1), paused (2), buffering (3), video cued (5).}});hookInputFocus();}// Start on loaddocument.addEventListener('DOMContentLoaded', main() );