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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=2 sw=2 et tw=78:
* 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 InkCollector_h__
#define InkCollector_h__
#include <objbase.h>
#include <msinkaut.h>
#include "mozilla/StaticPtr.h"
#define MOZ_WM_PEN_LEAVES_HOVER_OF_DIGITIZER WM_USER + 0x83
class InkCollectorEvent final : public _IInkCollectorEvents {
public:
// IUnknown
HRESULT __stdcall QueryInterface(REFIID aRiid, void** aObject);
virtual ULONG STDMETHODCALLTYPE AddRef() { return ++mRefCount; }
virtual ULONG STDMETHODCALLTYPE Release() {
MOZ_ASSERT(mRefCount);
if (!--mRefCount) {
delete this;
return 0;
}
return mRefCount;
}
protected:
// IDispatch
STDMETHOD(GetTypeInfoCount)(UINT* aInfo) { return E_NOTIMPL; }
STDMETHOD(GetTypeInfo)(UINT aInfo, LCID aId, ITypeInfo** aTInfo) {
return E_NOTIMPL;
}
STDMETHOD(GetIDsOfNames)
(REFIID aRiid, LPOLESTR* aStrNames, UINT aNames, LCID aId, DISPID* aDispId) {
return E_NOTIMPL;
}
STDMETHOD(Invoke)
(DISPID aDispIdMember, REFIID aRiid, LCID aId, WORD wFlags,
DISPPARAMS* aDispParams, VARIANT* aVarResult, EXCEPINFO* aExcepInfo,
UINT* aArgErr);
// InkCollectorEvent
void CursorOutOfRange(IInkCursor* aCursor) const;
bool IsHardProximityTablet(IInkTablet* aTablet) const;
private:
uint32_t mRefCount = 0;
~InkCollectorEvent() = default;
};
class InkCollector {
public:
~InkCollector();
void Shutdown();
HWND GetTarget();
void SetTarget(HWND aTargetWindow);
void ClearTarget();
uint16_t GetPointerId(); // 0 shows that there is no existing pen.
void SetPointerId(uint16_t aPointerId);
void ClearPointerId();
static mozilla::StaticAutoPtr<InkCollector> sInkCollector;
protected:
void Initialize();
void OnInitialize();
void Enable(bool aNewState);
private:
RefPtr<IUnknown> mMarshaller;
RefPtr<IInkCollector> mInkCollector;
RefPtr<IConnectionPoint> mConnectionPoint;
RefPtr<InkCollectorEvent> mInkCollectorEvent;
HWND mTargetWindow = 0;
DWORD mCookie = 0;
bool mComInitialized = false;
bool mEnabled = false;
// This value holds the previous pointerId of the pen, and is used by the
// nsWindow when processing a MOZ_WM_PEN_LEAVES_HOVER_OF_DIGITIZER which
// indicates that a pen leaves the digitizer.
// TODO: If we move our implementation to window pointer input messages, then
// we no longer need this value, since the pointerId can be retrieved from the
// window message, please refer to
// https://msdn.microsoft.com/en-us/library/windows/desktop/hh454916(v=vs.85).aspx
// NOTE: The pointerId of a pen shouldn't be 0 on a Windows platform, since 0
// is reserved of the mouse, please refer to
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms703320(v=vs.85).aspx
uint16_t mPointerId = 0;
};
#endif // InkCollector_h__
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