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/*
* Copyright (C) 2018 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
function enterFullscreen() {
let callback = arguments[0];
if (!document.fullscreenEnabled) {
callback(false);
return;
}
if (document.fullscreenElement) {
callback(true);
return;
}
let fullscreenChangeListener, fullscreenErrorListener;
fullscreenChangeListener = (e) => {
// Some other element went fullscreen, we didn't request it.
if (e.target !== document.documentElement)
return;
if (!document.fullscreenElement)
return;
document.removeEventListener("fullscreenchange", fullscreenChangeListener);
document.documentElement.removeEventListener("fullscreenerror", fullscreenErrorListener);
callback(true);
};
fullscreenErrorListener = (e) => {
// Some other element caused an error, we didn't request it.
if (e.target !== document.documentElement)
return;
document.removeEventListener("fullscreenchange", fullscreenChangeListener);
document.documentElement.removeEventListener("fullscreenerror", fullscreenErrorListener);
callback(!!document.fullscreenElement);
};
// The document fires change events, but the fullscreen element fires error events.
document.addEventListener("fullscreenchange", fullscreenChangeListener);
document.documentElement.addEventListener("fullscreenerror", fullscreenErrorListener);
document.documentElement.requestFullscreen();
}
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