gecko-dev/dom/camera/DOMCameraManager.h

105 lines
3.5 KiB
C++

/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
/* vim: set ts=2 et sw=2 tw=40: */
/* 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/. */
#ifndef DOM_CAMERA_DOMCAMERAMANAGER_H
#define DOM_CAMERA_DOMCAMERAMANAGER_H
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/Promise.h"
#include "nsCOMPtr.h"
#include "nsIObserver.h"
#include "nsHashKeys.h"
#include "nsWrapperCache.h"
#include "nsWeakReference.h"
#include "nsClassHashtable.h"
#include "nsCycleCollectionParticipant.h"
#include "mozilla/Attributes.h"
class nsPIDOMWindowInner;
namespace mozilla {
class ErrorResult;
class nsDOMCameraControl;
namespace dom {
struct CameraConfiguration;
} // namespace dom
} // namespace mozilla
typedef nsTArray<nsWeakPtr> CameraControls;
typedef nsClassHashtable<nsUint64HashKey, CameraControls> WindowTable;
class nsDOMCameraManager final
: public nsIObserver
, public nsSupportsWeakReference
, public nsWrapperCache
{
public:
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(nsDOMCameraManager,
nsIObserver)
NS_DECL_NSIOBSERVER
// Because this header's filename doesn't match its C++ or DOM-facing
// classname, we can't rely on the [Func="..."] WebIDL tag to implicitly
// include the right header for us; instead we must explicitly include a
// HasSupport() method in each header. We can get rid of these with the
// Great Renaming proposed in bug 983177.
static bool HasSupport(JSContext* aCx, JSObject* aGlobal);
static bool CheckPermission(nsPIDOMWindowInner* aWindow);
static already_AddRefed<nsDOMCameraManager>
CreateInstance(nsPIDOMWindowInner* aWindow);
static bool IsWindowStillActive(uint64_t aWindowId);
void Register(mozilla::nsDOMCameraControl* aDOMCameraControl);
void OnNavigation(uint64_t aWindowId);
void PermissionAllowed(uint32_t aCameraId,
const mozilla::dom::CameraConfiguration& aOptions,
mozilla::dom::Promise* aPromise);
void PermissionCancelled(uint32_t aCameraId,
const mozilla::dom::CameraConfiguration& aOptions,
mozilla::dom::Promise* aPromise);
// WebIDL
already_AddRefed<mozilla::dom::Promise>
GetCamera(const nsAString& aCamera,
const mozilla::dom::CameraConfiguration& aOptions,
mozilla::ErrorResult& aRv);
void GetListOfCameras(nsTArray<nsString>& aList, mozilla::ErrorResult& aRv);
nsPIDOMWindowInner* GetParentObject() const { return mWindow; }
virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
#ifdef MOZ_WIDGET_GONK
static void PreinitCameraHardware();
#endif
protected:
void XpComShutdown();
void Shutdown(uint64_t aWindowId);
~nsDOMCameraManager();
private:
nsDOMCameraManager() = delete;
explicit nsDOMCameraManager(nsPIDOMWindowInner* aWindow);
nsDOMCameraManager(const nsDOMCameraManager&) = delete;
nsDOMCameraManager& operator=(const nsDOMCameraManager&) = delete;
protected:
uint64_t mWindowId;
uint32_t mPermission;
nsCOMPtr<nsPIDOMWindowInner> mWindow;
/**
* 'sActiveWindows' is only ever accessed while in the Main Thread,
* so it is not otherwise protected.
*/
static ::WindowTable* sActiveWindows;
};
#endif // DOM_CAMERA_DOMCAMERAMANAGER_H