зеркало из https://github.com/mozilla/gecko-dev.git
67 строки
2.1 KiB
C++
67 строки
2.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "AutoplayPolicy.h"
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#include "mozilla/EventStateManager.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/dom/HTMLMediaElement.h"
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#include "mozilla/dom/HTMLMediaElementBinding.h"
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#include "nsIDocument.h"
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#include "MediaManager.h"
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namespace mozilla {
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namespace dom {
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/* static */ bool
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AutoplayPolicy::IsDocumentAllowedToPlay(nsIDocument* aDoc)
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{
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return aDoc ? aDoc->HasBeenUserActivated() : false;
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}
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/* static */ bool
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AutoplayPolicy::IsMediaElementAllowedToPlay(NotNull<HTMLMediaElement*> aElement)
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{
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if (Preferences::GetBool("media.autoplay.enabled")) {
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return true;
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}
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// Pages which have been granted permission to capture WebRTC camera or
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// microphone are assumed to be trusted, and are allowed to autoplay.
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MediaManager* manager = MediaManager::GetIfExists();
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if (manager) {
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nsCOMPtr<nsPIDOMWindowInner> window = aElement->OwnerDoc()->GetInnerWindow();
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if (window && manager->IsActivelyCapturingOrHasAPermission(window->WindowID())) {
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return true;
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}
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}
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// TODO : this old way would be removed when user-gestures-needed becomes
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// as a default option to block autoplay.
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if (!Preferences::GetBool("media.autoplay.enabled.user-gestures-needed", false)) {
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// If elelement is blessed, it would always be allowed to play().
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return aElement->IsBlessed() ||
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EventStateManager::IsHandlingUserInput();
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}
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// Muted content
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if (aElement->Volume() == 0.0 || aElement->Muted()) {
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return true;
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}
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// Media has already loaded metadata and doesn't contain audio track
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if (aElement->IsVideo() &&
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aElement->ReadyState() >= HTMLMediaElementBinding::HAVE_METADATA &&
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!aElement->HasAudio()) {
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return true;
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}
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return AutoplayPolicy::IsDocumentAllowedToPlay(aElement->OwnerDoc());
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}
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} // namespace dom
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} // namespace mozilla
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