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-rw-r--r--widget/windows/InkCollector.h102
1 files changed, 102 insertions, 0 deletions
diff --git a/widget/windows/InkCollector.h b/widget/windows/InkCollector.h
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+++ b/widget/windows/InkCollector.h
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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__