/* * Copyright (C) 2016 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. ``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 * 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. */ class ControlsVisibilitySupport extends MediaControllerSupport { constructor(mediaController) { super(mediaController); this._controlsAttributeObserver = new MutationObserver(this._updateControls.bind(this)); this._controlsAttributeObserver.observe(mediaController.media, { attributes: true, attributeFilter: ["controls"] }); this._updateControls(); } // Protected destroy() { this._controlsAttributeObserver.disconnect(); } get mediaEvents() { return ["loadedmetadata", "play", "pause"]; } handleEvent() { this._updateControls(); } // Private _updateControls() { const media = this.mediaController.media; const isVideo = media instanceof HTMLVideoElement; let shouldShowControls = this.mediaController.media.controls; if (isVideo) shouldShowControls = shouldShowControls && media.readyState > HTMLMediaElement.HAVE_NOTHING; const controls = this.mediaController.controls; controls.startButton.visible = shouldShowControls; controls.controlsBar.visible = shouldShowControls; controls.controlsBar.fadesWhileIdle = isVideo ? !media.paused : false; } }