gecko-dev/toolkit/content/TopLevelVideoDocument.js

49 строки
1.6 KiB
JavaScript

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
// <video> is used for top-level audio documents as well
let videoElement = document.getElementsByTagName("video")[0];
// 1. Handle fullscreen mode;
// 2. Send keystrokes to the video element if the body element is focused,
// to be received by the event listener in videocontrols.xml.
document.addEventListener("keypress", ev => {
if (ev.synthetic) // prevent recursion
return;
// Maximize the standalone video when pressing F11,
// but ignore audio elements
if (ev.key == "F11" && videoElement.videoWidth != 0 && videoElement.videoHeight != 0) {
// If we're in browser fullscreen mode, it means the user pressed F11
// while browser chrome or another tab had focus.
// Don't break leaving that mode, so do nothing here.
if (window.fullScreen) {
return;
}
// If we're not in browser fullscreen mode, prevent entering into that,
// so we don't end up there after pressing Esc.
ev.preventDefault();
ev.stopPropagation();
if (!document.mozFullScreenElement) {
videoElement.mozRequestFullScreen();
} else {
document.mozCancelFullScreen();
}
return;
}
// Check if the video element is focused, so it already receives
// keystrokes, and don't send it another one from here.
if (document.activeElement == videoElement)
return;
let newEvent = new KeyboardEvent("keypress", ev);
newEvent.synthetic = true;
videoElement.dispatchEvent(newEvent);
});