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114 lines
3.4 KiB
C++
114 lines
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef DOM_CAMERA_CAMERAPREFERENCES_H
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#define DOM_CAMERA_CAMERAPREFERENCES_H
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#include "nsString.h"
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#include "nsIObserver.h"
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#ifdef MOZ_WIDGET_GONK
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#include "mozilla/StaticPtr.h"
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#endif
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#if defined(MOZ_HAVE_CXX11_STRONG_ENUMS) || defined(MOZ_HAVE_CXX11_ENUM_TYPE)
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// Older compilers that don't support strongly-typed enums
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// just typedef uint32_t to nsresult, which results in conflicting
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// overloaded members in CameraPreferences.
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#define CAMERAPREFERENCES_HAVE_SEPARATE_UINT32_AND_NSRESULT
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#endif
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namespace mozilla {
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template<class T> class StaticAutoPtr;
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class CameraPreferences
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#ifdef MOZ_WIDGET_GONK
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: public nsIObserver
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#endif
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{
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public:
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#ifdef MOZ_WIDGET_GONK
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NS_DECL_ISUPPORTS
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NS_DECL_NSIOBSERVER
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#endif
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static bool Initialize();
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static void Shutdown();
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static bool GetPref(const char* aPref, nsACString& aVal);
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#ifdef CAMERAPREFERENCES_HAVE_SEPARATE_UINT32_AND_NSRESULT
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static bool GetPref(const char* aPref, nsresult& aVal);
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#endif
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static bool GetPref(const char* aPref, uint32_t& aVal);
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static bool GetPref(const char* aPref, bool& aVal);
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protected:
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static const uint32_t kPrefNotFound = UINT32_MAX;
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static uint32_t PrefToIndex(const char* aPref);
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static void PreferenceChanged(const char* aPref, void* aClosure);
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#ifdef CAMERAPREFERENCES_HAVE_SEPARATE_UINT32_AND_NSRESULT
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static nsresult UpdatePref(const char* aPref, nsresult& aVar);
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#endif
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static nsresult UpdatePref(const char* aPref, uint32_t& aVar);
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static nsresult UpdatePref(const char* aPref, nsACString& aVar);
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static nsresult UpdatePref(const char* aPref, bool& aVar);
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enum PrefValueType {
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kPrefValueIsNsResult,
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kPrefValueIsUint32,
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kPrefValueIsCString,
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kPrefValueIsBoolean
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};
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struct Pref {
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const char* const mPref;
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PrefValueType mValueType;
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union {
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// The 'mAsVoid' member must be first and is required to allow 'mValue'
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// to be initialized with any pointer type, as not all of our platforms
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// support the use of designated initializers; in their absence, only
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// the first element of a union can be statically initialized, and
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// 'void*' lets us stuff any pointer type into it.
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void* mAsVoid;
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StaticAutoPtr<nsCString>* mAsCString;
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nsresult* mAsNsResult;
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uint32_t* mAsUint32;
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bool* mAsBoolean;
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} mValue;
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};
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static Pref sPrefs[];
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static StaticAutoPtr<nsCString> sPrefTestEnabled;
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static StaticAutoPtr<nsCString> sPrefHardwareTest;
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static StaticAutoPtr<nsCString> sPrefGonkParameters;
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static nsresult sPrefCameraControlMethodErrorOverride;
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static nsresult sPrefCameraControlAsyncErrorOverride;
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static uint32_t sPrefCameraControlLowMemoryThresholdMB;
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static bool sPrefCameraParametersIsLowMemory;
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#ifdef MOZ_WIDGET_GONK
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static StaticRefPtr<CameraPreferences> sObserver;
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nsresult PreinitCameraHardware();
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protected:
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// Objects may be instantiated for use as observers.
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CameraPreferences() { }
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virtual ~CameraPreferences() { }
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#else
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private:
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// Static class only.
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CameraPreferences();
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~CameraPreferences();
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#endif
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};
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} // namespace mozilla
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#endif // DOM_CAMERA_CAMERAPREFERENCES_H
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