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Diffstat (limited to '')
| -rw-r--r-- | widget/windows/InkCollector.cpp | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/widget/windows/InkCollector.cpp b/widget/windows/InkCollector.cpp new file mode 100644 index 0000000000..2fcd2ea77d --- /dev/null +++ b/widget/windows/InkCollector.cpp @@ -0,0 +1,247 @@ +/* -*- 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/. + */ + +#include "InkCollector.h" +#include "nsDebug.h" +#include "nsISupportsUtils.h" + +// Msinkaut_i.c and Msinkaut.h should both be included +// https://msdn.microsoft.com/en-us/library/windows/desktop/ms695519.aspx +#include <msinkaut_i.c> + +mozilla::StaticAutoPtr<InkCollector> InkCollector::sInkCollector; + +InkCollector::~InkCollector() { + Shutdown(); + MOZ_ASSERT(!mCookie && !mEnabled && !mComInitialized && !mMarshaller && + !mInkCollector && !mConnectionPoint && !mInkCollectorEvent); +} + +void InkCollector::Initialize() { + // Possibly, we can use mConnectionPoint for checking, + // But if errors exist (perhaps COM object is unavailable), + // Initialize() will be called more times. + static bool sInkCollectorCreated = false; + if (sInkCollectorCreated) { + return; + } + sInkCollectorCreated = true; + + // COM could get uninitialized due to previous initialization. + mComInitialized = SUCCEEDED(::CoInitialize(nullptr)); + + // Set up instance of InkCollectorEvent. + mInkCollectorEvent = new InkCollectorEvent(); + + // Set up a free threaded marshaler. + if (FAILED(::CoCreateFreeThreadedMarshaler(mInkCollectorEvent, + getter_AddRefs(mMarshaller)))) { + return; + } + + // Create the ink collector. + if (FAILED(::CoCreateInstance(CLSID_InkCollector, NULL, CLSCTX_INPROC_SERVER, + IID_IInkCollector, + getter_AddRefs(mInkCollector)))) { + return; + } + + // Set up connection between sink and InkCollector. + RefPtr<IConnectionPointContainer> connPointContainer; + + // Get the connection point container. + if (SUCCEEDED(mInkCollector->QueryInterface( + IID_IConnectionPointContainer, getter_AddRefs(connPointContainer)))) { + // Find the connection point for Ink Collector events. + if (SUCCEEDED(connPointContainer->FindConnectionPoint( + __uuidof(_IInkCollectorEvents), + getter_AddRefs(mConnectionPoint)))) { + // Hook up sink to connection point. + if (SUCCEEDED(mConnectionPoint->Advise(mInkCollectorEvent, &mCookie))) { + OnInitialize(); + } + } + } +} + +void InkCollector::Shutdown() { + Enable(false); + if (mConnectionPoint) { + // Remove the connection of the sink to the Ink Collector. + mConnectionPoint->Unadvise(mCookie); + mCookie = 0; + mConnectionPoint = nullptr; + } + mInkCollector = nullptr; + mMarshaller = nullptr; + mInkCollectorEvent = nullptr; + + // Let uninitialization get handled in a place where it got inited. + if (mComInitialized) { + CoUninitialize(); + mComInitialized = false; + } +} + +void InkCollector::OnInitialize() { + // Suppress all events to do not allow performance decreasing. + // https://msdn.microsoft.com/en-us/library/ms820347.aspx + mInkCollector->SetEventInterest(InkCollectorEventInterest::ICEI_AllEvents, + VARIANT_FALSE); + + // Sets a value that indicates whether an object or control has interest in a + // specified event. + mInkCollector->SetEventInterest( + InkCollectorEventInterest::ICEI_CursorOutOfRange, VARIANT_TRUE); + + // If the MousePointer property is set to IMP_Custom and the MouseIcon + // property is NULL, Then the ink collector no longer handles mouse cursor + // settings. + // https://msdn.microsoft.com/en-us/library/windows/desktop/ms700686.aspx + mInkCollector->put_MouseIcon(nullptr); + mInkCollector->put_MousePointer(InkMousePointer::IMP_Custom); + + // This mode allows an ink collector to collect ink from any tablet attached + // to the Tablet PC. The Boolean value that indicates whether to use the mouse + // as an input device. If TRUE, the mouse is used for input. + // https://msdn.microsoft.com/en-us/library/ms820346.aspx + mInkCollector->SetAllTabletsMode(VARIANT_FALSE); + + // Sets the value that specifies whether ink is rendered as it is drawn. + // VARIANT_TRUE to render ink as it is drawn on the display. + // VARIANT_FALSE to not have the ink appear on the display as strokes are + // made. + // https://msdn.microsoft.com/en-us/library/windows/desktop/dd314598.aspx + mInkCollector->put_DynamicRendering(VARIANT_FALSE); + + // Set AutoRedraw to false to prevent repainting the ink when the window is + // invalidated. + mInkCollector->put_AutoRedraw(VARIANT_FALSE); +} + +// Sets a value that specifies whether the InkCollector object collects pen +// input. This property must be set to FALSE before setting or calling specific +// properties and methods of the object. +// https://msdn.microsoft.com/en-us/library/windows/desktop/ms701721.aspx +void InkCollector::Enable(bool aNewState) { + if (aNewState != mEnabled) { + if (mInkCollector) { + if (SUCCEEDED(mInkCollector->put_Enabled(aNewState ? VARIANT_TRUE + : VARIANT_FALSE))) { + mEnabled = aNewState; + } else { + NS_WARNING("InkCollector did not change status successfully"); + } + } else { + NS_WARNING("InkCollector should be exist"); + } + } +} + +HWND InkCollector::GetTarget() { return mTargetWindow; } + +void InkCollector::SetTarget(HWND aTargetWindow) { + NS_ASSERTION(aTargetWindow, "aTargetWindow should be exist"); + if (aTargetWindow && (aTargetWindow != mTargetWindow)) { + Initialize(); + if (mInkCollector) { + Enable(false); + if (SUCCEEDED(mInkCollector->put_hWnd((LONG_PTR)aTargetWindow))) { + mTargetWindow = aTargetWindow; + } else { + NS_WARNING("InkCollector did not change window property successfully"); + } + Enable(true); + } + } +} + +void InkCollector::ClearTarget() { + if (mTargetWindow && mInkCollector) { + Enable(false); + if (SUCCEEDED(mInkCollector->put_hWnd(0))) { + mTargetWindow = 0; + } else { + NS_WARNING("InkCollector did not clear window property successfully"); + } + } +} + +uint16_t InkCollector::GetPointerId() { return mPointerId; } + +void InkCollector::SetPointerId(uint16_t aPointerId) { + mPointerId = aPointerId; +} + +void InkCollector::ClearPointerId() { mPointerId = 0; } + +// The display and the digitizer have quite different properties. +// The display has CursorMustTouch, the mouse pointer alway touches the display +// surface. The digitizer lists Integrated and HardProximity. When the stylus is +// in the proximity of the tablet its movements are also detected. An external +// tablet will only list HardProximity. +bool InkCollectorEvent::IsHardProximityTablet(IInkTablet* aTablet) const { + if (aTablet) { + TabletHardwareCapabilities caps; + if (SUCCEEDED(aTablet->get_HardwareCapabilities(&caps))) { + return (TabletHardwareCapabilities::THWC_HardProximity & caps); + } + } + return false; +} + +HRESULT __stdcall InkCollectorEvent::QueryInterface(REFIID aRiid, + void** aObject) { + // Validate the input + if (!aObject) { + return E_POINTER; + } + HRESULT result = E_NOINTERFACE; + // This object supports IUnknown/IDispatch/IInkCollectorEvents + if ((IID_IUnknown == aRiid) || (IID_IDispatch == aRiid) || + (DIID__IInkCollectorEvents == aRiid)) { + *aObject = this; + // AddRef should be called when we give info about interface + NS_ADDREF_THIS(); + result = S_OK; + } + return result; +} + +HRESULT InkCollectorEvent::Invoke(DISPID aDispIdMember, REFIID /*aRiid*/, + LCID /*aId*/, WORD /*wFlags*/, + DISPPARAMS* aDispParams, + VARIANT* /*aVarResult*/, + EXCEPINFO* /*aExcepInfo*/, + UINT* /*aArgErr*/) { + switch (aDispIdMember) { + case DISPID_ICECursorOutOfRange: { + if (aDispParams && aDispParams->cArgs) { + CursorOutOfRange( + static_cast<IInkCursor*>(aDispParams->rgvarg[0].pdispVal)); + } + break; + } + } + return S_OK; +} + +void InkCollectorEvent::CursorOutOfRange(IInkCursor* aCursor) const { + IInkTablet* curTablet = nullptr; + if (FAILED(aCursor->get_Tablet(&curTablet))) { + return; + } + // All events should be suppressed except + // from tablets with hard proximity. + if (!IsHardProximityTablet(curTablet)) { + return; + } + // Notify current target window. + if (HWND targetWindow = InkCollector::sInkCollector->GetTarget()) { + ::SendMessage(targetWindow, MOZ_WM_PEN_LEAVES_HOVER_OF_DIGITIZER, 0, 0); + } +} |