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/*
* Copyright (C) 2014 Igalia S.L.
* Copyright (C) 2016-2018 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "UserMediaPermissionRequestManager.h"
#if ENABLE(MEDIA_STREAM)
#include "Logging.h"
#include "MessageSenderInlines.h"
#include "WebCoreArgumentCoders.h"
#include "WebFrame.h"
#include "WebPage.h"
#include "WebPageProxyMessages.h"
#include <WebCore/CaptureDevice.h>
#include <WebCore/Document.h>
#include <WebCore/FrameDestructionObserverInlines.h>
#include <WebCore/FrameLoader.h>
#include <WebCore/LocalFrame.h>
#include <WebCore/MediaConstraints.h>
#include <WebCore/Page.h>
#include <WebCore/SecurityOrigin.h>
#include <WebCore/SecurityOriginData.h>
namespace WebKit {
using namespace WebCore;
static constexpr OptionSet<ActivityState> focusedActiveWindow = { ActivityState::IsFocused, ActivityState::WindowIsActive };
UserMediaPermissionRequestManager::UserMediaPermissionRequestManager(WebPage& page)
: m_page(page)
{
}
void UserMediaPermissionRequestManager::startUserMediaRequest(UserMediaRequest& request)
{
Document* document = request.document();
auto* frame = document ? document->frame() : nullptr;
if (!frame || !document->page()) {
request.deny(MediaAccessDenialReason::OtherFailure, emptyString());
return;
}
if (document->page()->canStartMedia()) {
sendUserMediaRequest(request);
return;
}
auto& pendingRequests = m_pendingUserMediaRequests.add(document, Vector<Ref<UserMediaRequest>>()).iterator->value;
if (pendingRequests.isEmpty())
document->addMediaCanStartListener(*this);
pendingRequests.append(request);
}
void UserMediaPermissionRequestManager::sendUserMediaRequest(UserMediaRequest& userRequest)
{
auto* frame = userRequest.document() ? userRequest.document()->frame() : nullptr;
if (!frame) {
userRequest.deny(MediaAccessDenialReason::OtherFailure, emptyString());
return;
}
m_ongoingUserMediaRequests.add(userRequest.identifier(), userRequest);
WebFrame* webFrame = WebFrame::fromCoreFrame(*frame);
ASSERT(webFrame);
auto* topLevelDocumentOrigin = userRequest.topLevelDocumentOrigin();
m_page.send(Messages::WebPageProxy::RequestUserMediaPermissionForFrame(userRequest.identifier(), webFrame->frameID(), userRequest.userMediaDocumentOrigin()->data(), topLevelDocumentOrigin->data(), userRequest.request()));
}
void UserMediaPermissionRequestManager::cancelUserMediaRequest(UserMediaRequest& request)
{
if (auto removedRequest = m_ongoingUserMediaRequests.take(request.identifier()))
return;
auto* document = request.document();
if (!document)
return;
auto iterator = m_pendingUserMediaRequests.find(document);
if (iterator == m_pendingUserMediaRequests.end())
return;
auto& pendingRequests = iterator->value;
pendingRequests.removeFirstMatching([&request](auto& item) {
return &request == item.ptr();
});
if (!pendingRequests.isEmpty())
return;
document->removeMediaCanStartListener(*this);
m_pendingUserMediaRequests.remove(iterator);
}
void UserMediaPermissionRequestManager::mediaCanStart(Document& document)
{
ASSERT(document.page()->canStartMedia());
auto pendingRequests = m_pendingUserMediaRequests.take(&document);
for (auto& pendingRequest : pendingRequests)
sendUserMediaRequest(pendingRequest);
}
void UserMediaPermissionRequestManager::userMediaAccessWasGranted(UserMediaRequestIdentifier requestID, CaptureDevice&& audioDevice, CaptureDevice&& videoDevice, WebCore::MediaDeviceHashSalts&& deviceIdentifierHashSalts, CompletionHandler<void()>&& completionHandler)
{
auto request = m_ongoingUserMediaRequests.take(requestID);
if (!request) {
completionHandler();
return;
}
request->allow(WTFMove(audioDevice), WTFMove(videoDevice), WTFMove(deviceIdentifierHashSalts), WTFMove(completionHandler));
}
void UserMediaPermissionRequestManager::userMediaAccessWasDenied(UserMediaRequestIdentifier requestID, MediaAccessDenialReason reason, String&& invalidConstraint)
{
auto request = m_ongoingUserMediaRequests.take(requestID);
if (!request)
return;
request->deny(reason, WTFMove(invalidConstraint));
}
void UserMediaPermissionRequestManager::enumerateMediaDevices(Document& document, CompletionHandler<void(Vector<CaptureDeviceWithCapabilities>&&, MediaDeviceHashSalts&&)>&& completionHandler)
{
auto* frame = document.frame();
if (!frame) {
completionHandler({ }, { });
return;
}
m_page.sendWithAsyncReply(Messages::WebPageProxy::EnumerateMediaDevicesForFrame { WebFrame::fromCoreFrame(*frame)->frameID(), document.securityOrigin().data(), document.topOrigin().data() }, WTFMove(completionHandler));
}
#if USE(GSTREAMER)
void UserMediaPermissionRequestManager::updateCaptureDevices(ShouldNotify shouldNotify)
{
WebCore::RealtimeMediaSourceCenter::singleton().getMediaStreamDevices([weakThis = WeakPtr { *this }, this, shouldNotify](auto&& newDevices) mutable {
if (!weakThis)
return;
if (!haveDevicesChanged(m_captureDevices, newDevices))
return;
m_captureDevices = WTFMove(newDevices);
if (shouldNotify == ShouldNotify::Yes)
captureDevicesChanged();
});
}
void UserMediaPermissionRequestManager::devicesChanged()
{
updateCaptureDevices(ShouldNotify::Yes);
}
#endif
UserMediaClient::DeviceChangeObserverToken UserMediaPermissionRequestManager::addDeviceChangeObserver(Function<void()>&& observer)
{
auto identifier = UserMediaClient::DeviceChangeObserverToken::generate();
m_deviceChangeObserverMap.add(identifier, WTFMove(observer));
if (!m_monitoringDeviceChange) {
m_monitoringDeviceChange = true;
#if USE(GSTREAMER)
updateCaptureDevices(ShouldNotify::No);
WebCore::RealtimeMediaSourceCenter::singleton().addDevicesChangedObserver(*this);
#else
m_page.send(Messages::WebPageProxy::BeginMonitoringCaptureDevices());
#endif
}
return identifier;
}
void UserMediaPermissionRequestManager::removeDeviceChangeObserver(UserMediaClient::DeviceChangeObserverToken token)
{
bool wasRemoved = m_deviceChangeObserverMap.remove(token);
ASSERT_UNUSED(wasRemoved, wasRemoved);
}
void UserMediaPermissionRequestManager::captureDevicesChanged()
{
// When new media input and/or output devices are made available, or any available input and/or
// output device becomes unavailable, the User Agent MUST run the following steps in browsing
// contexts where at least one of the following criteria are met, but in no other contexts:
// * The permission state of the "device-info" permission is "granted",
// * any of the input devices are attached to an active MediaStream in the browsing context, or
// * the active document is fully active and has focus.
auto identifiers = m_deviceChangeObserverMap.keys();
for (auto& identifier : identifiers) {
auto iterator = m_deviceChangeObserverMap.find(identifier);
if (iterator != m_deviceChangeObserverMap.end())
(iterator->value)();
}
}
} // namespace WebKit
#endif // ENABLE(MEDIA_STREAM)
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