gecko-dev/dom/media/AutoplayPolicy.cpp

67 строки
2.1 KiB
C++
Исходник Обычный вид История

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#include "AutoplayPolicy.h"
#include "mozilla/EventStateManager.h"
#include "mozilla/Preferences.h"
#include "mozilla/dom/HTMLMediaElement.h"
#include "mozilla/dom/HTMLMediaElementBinding.h"
#include "nsIDocument.h"
#include "MediaManager.h"
namespace mozilla {
namespace dom {
/* static */ bool
AutoplayPolicy::IsDocumentAllowedToPlay(nsIDocument* aDoc)
{
return aDoc ? aDoc->HasBeenUserActivated() : false;
}
/* static */ bool
AutoplayPolicy::IsMediaElementAllowedToPlay(NotNull<HTMLMediaElement*> aElement)
{
if (Preferences::GetBool("media.autoplay.enabled")) {
return true;
}
// Pages which have been granted permission to capture WebRTC camera or
// microphone are assumed to be trusted, and are allowed to autoplay.
MediaManager* manager = MediaManager::GetIfExists();
if (manager) {
nsCOMPtr<nsPIDOMWindowInner> window = aElement->OwnerDoc()->GetInnerWindow();
if (window && manager->IsActivelyCapturingOrHasAPermission(window->WindowID())) {
return true;
}
}
// TODO : this old way would be removed when user-gestures-needed becomes
// as a default option to block autoplay.
if (!Preferences::GetBool("media.autoplay.enabled.user-gestures-needed", false)) {
// If elelement is blessed, it would always be allowed to play().
return aElement->IsBlessed() ||
EventStateManager::IsHandlingUserInput();
}
// Muted content
if (aElement->Volume() == 0.0 || aElement->Muted()) {
return true;
}
// Media has already loaded metadata and doesn't contain audio track
if (aElement->IsVideo() &&
aElement->ReadyState() >= HTMLMediaElementBinding::HAVE_METADATA &&
!aElement->HasAudio()) {
return true;
}
return AutoplayPolicy::IsDocumentAllowedToPlay(aElement->OwnerDoc());
}
} // namespace dom
} // namespace mozilla