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Diffstat (limited to 'widget/InputData.cpp')
| -rw-r--r-- | widget/InputData.cpp | 924 |
1 files changed, 924 insertions, 0 deletions
diff --git a/widget/InputData.cpp b/widget/InputData.cpp new file mode 100644 index 0000000000..3d1695dd8e --- /dev/null +++ b/widget/InputData.cpp @@ -0,0 +1,924 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* 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 "InputData.h" + +#include "mozilla/dom/MouseEventBinding.h" +#include "mozilla/dom/Touch.h" +#include "mozilla/dom/WheelEventBinding.h" +#include "mozilla/TextEvents.h" +#include "nsContentUtils.h" +#include "nsDebug.h" +#include "nsThreadUtils.h" +#include "mozilla/MouseEvents.h" +#include "mozilla/TouchEvents.h" +#include "mozilla/SwipeTracker.h" +#include "UnitTransforms.h" + +namespace mozilla { + +using namespace dom; + +InputData::~InputData() = default; + +InputData::InputData(InputType aInputType) + : mInputType(aInputType), + mFocusSequenceNumber(0), + mLayersId{0}, + modifiers(0) {} + +InputData::InputData(InputType aInputType, TimeStamp aTimeStamp, + Modifiers aModifiers) + : mInputType(aInputType), + mTimeStamp(aTimeStamp), + mFocusSequenceNumber(0), + mLayersId{0}, + modifiers(aModifiers) {} + +SingleTouchData::SingleTouchData(int32_t aIdentifier, + ScreenIntPoint aScreenPoint, + ScreenSize aRadius, float aRotationAngle, + float aForce) + : mIdentifier(aIdentifier), + mScreenPoint(aScreenPoint), + mRadius(aRadius), + mRotationAngle(aRotationAngle), + mForce(aForce) {} + +SingleTouchData::SingleTouchData(int32_t aIdentifier, + ParentLayerPoint aLocalScreenPoint, + ScreenSize aRadius, float aRotationAngle, + float aForce) + : mIdentifier(aIdentifier), + mLocalScreenPoint(aLocalScreenPoint), + mRadius(aRadius), + mRotationAngle(aRotationAngle), + mForce(aForce) {} + +SingleTouchData::SingleTouchData() + : mIdentifier(0), mRotationAngle(0.0), mForce(0.0) {} + +already_AddRefed<Touch> SingleTouchData::ToNewDOMTouch() const { + MOZ_ASSERT(NS_IsMainThread(), + "Can only create dom::Touch instances on main thread"); + RefPtr<Touch> touch = + new Touch(mIdentifier, + LayoutDeviceIntPoint::Truncate(mScreenPoint.x, mScreenPoint.y), + LayoutDeviceIntPoint::Truncate(mRadius.width, mRadius.height), + mRotationAngle, mForce); + touch->tiltX = mTiltX; + touch->tiltY = mTiltY; + touch->twist = mTwist; + return touch.forget(); +} + +MultiTouchInput::MultiTouchInput(MultiTouchType aType, uint32_t aTime, + TimeStamp aTimeStamp, Modifiers aModifiers) + : InputData(MULTITOUCH_INPUT, aTimeStamp, aModifiers), + mType(aType), + mHandledByAPZ(false) {} + +MultiTouchInput::MultiTouchInput() + : InputData(MULTITOUCH_INPUT), + mType(MULTITOUCH_START), + mHandledByAPZ(false) {} + +MultiTouchInput::MultiTouchInput(const WidgetTouchEvent& aTouchEvent) + : InputData(MULTITOUCH_INPUT, aTouchEvent.mTimeStamp, + aTouchEvent.mModifiers), + mHandledByAPZ(aTouchEvent.mFlags.mHandledByAPZ), + mButton(aTouchEvent.mButton), + mButtons(aTouchEvent.mButtons) { + MOZ_ASSERT(NS_IsMainThread(), + "Can only copy from WidgetTouchEvent on main thread"); + + switch (aTouchEvent.mMessage) { + case eTouchStart: + mType = MULTITOUCH_START; + break; + case eTouchMove: + mType = MULTITOUCH_MOVE; + break; + case eTouchEnd: + mType = MULTITOUCH_END; + break; + case eTouchCancel: + mType = MULTITOUCH_CANCEL; + break; + default: + MOZ_ASSERT_UNREACHABLE("Did not assign a type to a MultiTouchInput"); + break; + } + + mScreenOffset = ViewAs<ExternalPixel>( + aTouchEvent.mWidget->WidgetToScreenOffset(), + PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent); + + for (size_t i = 0; i < aTouchEvent.mTouches.Length(); i++) { + const Touch* domTouch = aTouchEvent.mTouches[i]; + + // Extract data from weird interfaces. + int32_t identifier = domTouch->Identifier(); + int32_t radiusX = domTouch->RadiusX(CallerType::System); + int32_t radiusY = domTouch->RadiusY(CallerType::System); + float rotationAngle = domTouch->RotationAngle(CallerType::System); + float force = domTouch->Force(CallerType::System); + + SingleTouchData data( + identifier, + ViewAs<ScreenPixel>( + domTouch->mRefPoint, + PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent), + ScreenSize((float)radiusX, (float)radiusY), rotationAngle, force); + + mTouches.AppendElement(data); + } +} + +void MultiTouchInput::Translate(const ScreenPoint& aTranslation) { + ScreenIntPoint translation = RoundedToInt(aTranslation); + + for (auto& touchData : mTouches) { + for (auto& historicalData : touchData.mHistoricalData) { + historicalData.mScreenPoint.MoveBy(translation.x, translation.y); + } + touchData.mScreenPoint.MoveBy(translation.x, translation.y); + } +} + +WidgetTouchEvent MultiTouchInput::ToWidgetEvent(nsIWidget* aWidget, + uint16_t aInputSource) const { + MOZ_ASSERT(NS_IsMainThread(), + "Can only convert To WidgetTouchEvent on main thread"); + MOZ_ASSERT(aInputSource == + mozilla::dom::MouseEvent_Binding::MOZ_SOURCE_TOUCH || + aInputSource == mozilla::dom::MouseEvent_Binding::MOZ_SOURCE_PEN); + + EventMessage touchEventMessage = eVoidEvent; + switch (mType) { + case MULTITOUCH_START: + touchEventMessage = eTouchStart; + break; + case MULTITOUCH_MOVE: + touchEventMessage = eTouchMove; + break; + case MULTITOUCH_END: + touchEventMessage = eTouchEnd; + break; + case MULTITOUCH_CANCEL: + touchEventMessage = eTouchCancel; + break; + default: + MOZ_ASSERT_UNREACHABLE( + "Did not assign a type to WidgetTouchEvent in MultiTouchInput"); + break; + } + + WidgetTouchEvent event(true, touchEventMessage, aWidget); + if (touchEventMessage == eVoidEvent) { + return event; + } + + event.mModifiers = this->modifiers; + event.mTimeStamp = this->mTimeStamp; + event.mFlags.mHandledByAPZ = mHandledByAPZ; + event.mFocusSequenceNumber = mFocusSequenceNumber; + event.mLayersId = mLayersId; + event.mInputSource = aInputSource; + event.mButton = mButton; + event.mButtons = mButtons; + + for (size_t i = 0; i < mTouches.Length(); i++) { + *event.mTouches.AppendElement() = mTouches[i].ToNewDOMTouch(); + } + + return event; +} + +int32_t MultiTouchInput::IndexOfTouch(int32_t aTouchIdentifier) { + for (size_t i = 0; i < mTouches.Length(); i++) { + if (mTouches[i].mIdentifier == aTouchIdentifier) { + return (int32_t)i; + } + } + return -1; +} + +bool MultiTouchInput::TransformToLocal( + const ScreenToParentLayerMatrix4x4& aTransform) { + for (auto& touchData : mTouches) { + for (auto& historicalData : touchData.mHistoricalData) { + Maybe<ParentLayerIntPoint> historicalPoint = + UntransformBy(aTransform, historicalData.mScreenPoint); + if (!historicalPoint) { + return false; + } + historicalData.mLocalScreenPoint = *historicalPoint; + } + Maybe<ParentLayerIntPoint> point = + UntransformBy(aTransform, touchData.mScreenPoint); + if (!point) { + return false; + } + touchData.mLocalScreenPoint = *point; + } + return true; +} + +MouseInput::MouseInput() + : InputData(MOUSE_INPUT), + mType(MOUSE_NONE), + mButtonType(NONE), + mInputSource(0), + mButtons(0), + mHandledByAPZ(false), + mPreventClickEvent(false) {} + +MouseInput::MouseInput(MouseType aType, ButtonType aButtonType, + uint16_t aInputSource, int16_t aButtons, + const ScreenPoint& aPoint, TimeStamp aTimeStamp, + Modifiers aModifiers) + : InputData(MOUSE_INPUT, aTimeStamp, aModifiers), + mType(aType), + mButtonType(aButtonType), + mInputSource(aInputSource), + mButtons(aButtons), + mOrigin(aPoint), + mHandledByAPZ(false), + mPreventClickEvent(false) {} + +MouseInput::MouseInput(const WidgetMouseEventBase& aMouseEvent) + : InputData(MOUSE_INPUT, aMouseEvent.mTimeStamp, aMouseEvent.mModifiers), + mType(MOUSE_NONE), + mButtonType(NONE), + mInputSource(aMouseEvent.mInputSource), + mButtons(aMouseEvent.mButtons), + mHandledByAPZ(aMouseEvent.mFlags.mHandledByAPZ), + mPreventClickEvent(aMouseEvent.mClass == eMouseEventClass && + aMouseEvent.AsMouseEvent()->mClickEventPrevented) { + MOZ_ASSERT(NS_IsMainThread(), + "Can only copy from WidgetTouchEvent on main thread"); + + mButtonType = NONE; + + switch (aMouseEvent.mButton) { + case MouseButton::ePrimary: + mButtonType = MouseInput::PRIMARY_BUTTON; + break; + case MouseButton::eMiddle: + mButtonType = MouseInput::MIDDLE_BUTTON; + break; + case MouseButton::eSecondary: + mButtonType = MouseInput::SECONDARY_BUTTON; + break; + } + + switch (aMouseEvent.mMessage) { + case eMouseMove: + mType = MOUSE_MOVE; + break; + case eMouseUp: + mType = MOUSE_UP; + break; + case eMouseDown: + mType = MOUSE_DOWN; + break; + case eDragStart: + mType = MOUSE_DRAG_START; + break; + case eDragEnd: + mType = MOUSE_DRAG_END; + break; + case eMouseEnterIntoWidget: + mType = MOUSE_WIDGET_ENTER; + break; + case eMouseExitFromWidget: + mType = MOUSE_WIDGET_EXIT; + break; + case eMouseExploreByTouch: + mType = MOUSE_EXPLORE_BY_TOUCH; + break; + case eMouseHitTest: + mType = MOUSE_HITTEST; + break; + default: + MOZ_ASSERT_UNREACHABLE("Mouse event type not supported"); + break; + } + + mOrigin = ScreenPoint(ViewAs<ScreenPixel>( + aMouseEvent.mRefPoint, + PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent)); +} + +bool MouseInput::IsLeftButton() const { return mButtonType == PRIMARY_BUTTON; } + +bool MouseInput::TransformToLocal( + const ScreenToParentLayerMatrix4x4& aTransform) { + Maybe<ParentLayerPoint> point = UntransformBy(aTransform, mOrigin); + if (!point) { + return false; + } + mLocalOrigin = *point; + + return true; +} + +WidgetMouseEvent MouseInput::ToWidgetEvent(nsIWidget* aWidget) const { + MOZ_ASSERT(NS_IsMainThread(), + "Can only convert To WidgetTouchEvent on main thread"); + + EventMessage msg = eVoidEvent; + uint32_t clickCount = 0; + Maybe<WidgetMouseEvent::ExitFrom> exitFrom; + switch (mType) { + case MOUSE_MOVE: + msg = eMouseMove; + break; + case MOUSE_UP: + msg = eMouseUp; + clickCount = 1; + break; + case MOUSE_DOWN: + msg = eMouseDown; + clickCount = 1; + break; + case MOUSE_DRAG_START: + msg = eDragStart; + break; + case MOUSE_DRAG_END: + msg = eDragEnd; + break; + case MOUSE_WIDGET_ENTER: + msg = eMouseEnterIntoWidget; + break; + case MOUSE_WIDGET_EXIT: + msg = eMouseExitFromWidget; + exitFrom = Some(WidgetMouseEvent::ePlatformChild); + break; + case MOUSE_EXPLORE_BY_TOUCH: + msg = eMouseExploreByTouch; + break; + case MOUSE_HITTEST: + msg = eMouseHitTest; + break; + default: + MOZ_ASSERT_UNREACHABLE( + "Did not assign a type to WidgetMouseEvent in MouseInput"); + break; + } + + WidgetMouseEvent event(true, msg, aWidget, WidgetMouseEvent::eReal, + WidgetMouseEvent::eNormal); + + if (msg == eVoidEvent) { + return event; + } + + switch (mButtonType) { + case MouseInput::PRIMARY_BUTTON: + event.mButton = MouseButton::ePrimary; + break; + case MouseInput::MIDDLE_BUTTON: + event.mButton = MouseButton::eMiddle; + break; + case MouseInput::SECONDARY_BUTTON: + event.mButton = MouseButton::eSecondary; + break; + case MouseInput::NONE: + default: + break; + } + + event.mButtons = mButtons; + event.mModifiers = modifiers; + event.mTimeStamp = mTimeStamp; + event.mLayersId = mLayersId; + event.mFlags.mHandledByAPZ = mHandledByAPZ; + event.mRefPoint = RoundedToInt(ViewAs<LayoutDevicePixel>( + mOrigin, + PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent)); + event.mClickCount = clickCount; + event.mInputSource = mInputSource; + event.mFocusSequenceNumber = mFocusSequenceNumber; + event.mExitFrom = exitFrom; + event.mClickEventPrevented = mPreventClickEvent; + + return event; +} + +PanGestureInput::PanGestureInput() + : InputData(PANGESTURE_INPUT), + mType(PANGESTURE_MAYSTART), + mLineOrPageDeltaX(0), + mLineOrPageDeltaY(0), + mUserDeltaMultiplierX(1.0), + mUserDeltaMultiplierY(1.0), + mHandledByAPZ(false), + mOverscrollBehaviorAllowsSwipe(false), + mSimulateMomentum(false), + mIsNoLineOrPageDelta(true), + mMayTriggerSwipe(false) {} + +PanGestureInput::PanGestureInput(PanGestureType aType, TimeStamp aTimeStamp, + const ScreenPoint& aPanStartPoint, + const ScreenPoint& aPanDisplacement, + Modifiers aModifiers) + : InputData(PANGESTURE_INPUT, aTimeStamp, aModifiers), + mType(aType), + mPanStartPoint(aPanStartPoint), + mPanDisplacement(aPanDisplacement), + mLineOrPageDeltaX(0), + mLineOrPageDeltaY(0), + mUserDeltaMultiplierX(1.0), + mUserDeltaMultiplierY(1.0), + mHandledByAPZ(false), + mOverscrollBehaviorAllowsSwipe(false), + mSimulateMomentum(false), + mIsNoLineOrPageDelta(true) { + mMayTriggerSwipe = SwipeTracker::CanTriggerSwipe(*this); +} + +PanGestureInput::PanGestureInput(PanGestureType aType, TimeStamp aTimeStamp, + const ScreenPoint& aPanStartPoint, + const ScreenPoint& aPanDisplacement, + Modifiers aModifiers, + IsEligibleForSwipe aIsEligibleForSwipe) + : PanGestureInput(aType, aTimeStamp, aPanStartPoint, aPanDisplacement, + aModifiers) { + mMayTriggerSwipe &= bool(aIsEligibleForSwipe); +} + +void PanGestureInput::SetLineOrPageDeltas(int32_t aLineOrPageDeltaX, + int32_t aLineOrPageDeltaY) { + mLineOrPageDeltaX = aLineOrPageDeltaX; + mLineOrPageDeltaY = aLineOrPageDeltaY; + mIsNoLineOrPageDelta = false; +} + +bool PanGestureInput::IsMomentum() const { + switch (mType) { + case PanGestureInput::PANGESTURE_MOMENTUMSTART: + case PanGestureInput::PANGESTURE_MOMENTUMPAN: + case PanGestureInput::PANGESTURE_MOMENTUMEND: + return true; + default: + return false; + } +} + +WidgetWheelEvent PanGestureInput::ToWidgetEvent(nsIWidget* aWidget) const { + WidgetWheelEvent wheelEvent(true, eWheel, aWidget); + wheelEvent.mModifiers = this->modifiers; + wheelEvent.mTimeStamp = mTimeStamp; + wheelEvent.mLayersId = mLayersId; + wheelEvent.mRefPoint = RoundedToInt(ViewAs<LayoutDevicePixel>( + mPanStartPoint, + PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent)); + wheelEvent.mButtons = 0; + wheelEvent.mMayHaveMomentum = true; // pan inputs may have momentum + wheelEvent.mIsMomentum = IsMomentum(); + wheelEvent.mLineOrPageDeltaX = mLineOrPageDeltaX; + wheelEvent.mLineOrPageDeltaY = mLineOrPageDeltaY; + wheelEvent.mDeltaX = mPanDisplacement.x; + wheelEvent.mDeltaY = mPanDisplacement.y; + wheelEvent.mFlags.mHandledByAPZ = mHandledByAPZ; + wheelEvent.mFocusSequenceNumber = mFocusSequenceNumber; + wheelEvent.mIsNoLineOrPageDelta = mIsNoLineOrPageDelta; + if (mDeltaType == PanGestureInput::PANDELTA_PAGE) { + // widget/gtk is currently the only consumer that uses delta type + // PANDELTA_PAGE + // Emulate legacy widget/gtk behavior + wheelEvent.mDeltaMode = WheelEvent_Binding::DOM_DELTA_LINE; + wheelEvent.mScrollType = WidgetWheelEvent::SCROLL_ASYNCHRONOUSLY; + wheelEvent.mDeltaX *= 3; + wheelEvent.mDeltaY *= 3; + } else { + wheelEvent.mDeltaMode = WheelEvent_Binding::DOM_DELTA_PIXEL; + } + return wheelEvent; +} + +bool PanGestureInput::TransformToLocal( + const ScreenToParentLayerMatrix4x4& aTransform) { + Maybe<ParentLayerPoint> panStartPoint = + UntransformBy(aTransform, mPanStartPoint); + if (!panStartPoint) { + return false; + } + mLocalPanStartPoint = *panStartPoint; + + if (mDeltaType == PanGestureInput::PANDELTA_PAGE) { + // Skip transforming the pan displacement because we want + // raw page proportion counts. + mLocalPanDisplacement = ViewAs<ParentLayerPixel>( + mPanDisplacement, PixelCastJustification::DeltaIsPageProportion); + return true; + } + + Maybe<ParentLayerPoint> panDisplacement = + UntransformVector(aTransform, mPanDisplacement, mPanStartPoint); + if (!panDisplacement) { + return false; + } + mLocalPanDisplacement = *panDisplacement; + return true; +} + +ScreenPoint PanGestureInput::UserMultipliedPanDisplacement() const { + return ScreenPoint(mPanDisplacement.x * mUserDeltaMultiplierX, + mPanDisplacement.y * mUserDeltaMultiplierY); +} + +ParentLayerPoint PanGestureInput::UserMultipliedLocalPanDisplacement() const { + return ParentLayerPoint(mLocalPanDisplacement.x * mUserDeltaMultiplierX, + mLocalPanDisplacement.y * mUserDeltaMultiplierY); +} + +static int32_t TakeLargestInt(gfx::Coord* aCoord) { + int32_t result(aCoord->value); // truncate towards zero + aCoord->value -= result; + return result; +} + +/* static */ gfx::IntPoint PanGestureInput::GetIntegerDeltaForEvent( + bool aIsStart, float x, float y) { + static gfx::Point sAccumulator(0.0f, 0.0f); + if (aIsStart) { + sAccumulator = gfx::Point(0.0f, 0.0f); + } + sAccumulator.x += x; + sAccumulator.y += y; + return gfx::IntPoint(TakeLargestInt(&sAccumulator.x), + TakeLargestInt(&sAccumulator.y)); +} + +PinchGestureInput::PinchGestureInput() + : InputData(PINCHGESTURE_INPUT), + mType(PINCHGESTURE_START), + mSource(UNKNOWN), + mHandledByAPZ(false) {} + +PinchGestureInput::PinchGestureInput( + PinchGestureType aType, PinchGestureSource aSource, TimeStamp aTimeStamp, + const ExternalPoint& aScreenOffset, const ScreenPoint& aFocusPoint, + ScreenCoord aCurrentSpan, ScreenCoord aPreviousSpan, Modifiers aModifiers) + : InputData(PINCHGESTURE_INPUT, aTimeStamp, aModifiers), + mType(aType), + mSource(aSource), + mFocusPoint(aFocusPoint), + mScreenOffset(aScreenOffset), + mCurrentSpan(aCurrentSpan), + mPreviousSpan(aPreviousSpan), + mLineOrPageDeltaY(0), + mHandledByAPZ(false) {} + +bool PinchGestureInput::TransformToLocal( + const ScreenToParentLayerMatrix4x4& aTransform) { + Maybe<ParentLayerPoint> point = UntransformBy(aTransform, mFocusPoint); + if (!point) { + return false; + } + mLocalFocusPoint = *point; + return true; +} + +WidgetWheelEvent PinchGestureInput::ToWidgetEvent(nsIWidget* aWidget) const { + WidgetWheelEvent wheelEvent(true, eWheel, aWidget); + wheelEvent.mModifiers = this->modifiers | MODIFIER_CONTROL; + wheelEvent.mTimeStamp = mTimeStamp; + wheelEvent.mLayersId = mLayersId; + wheelEvent.mRefPoint = RoundedToInt(ViewAs<LayoutDevicePixel>( + mFocusPoint, + PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent)); + wheelEvent.mButtons = 0; + wheelEvent.mFlags.mHandledByAPZ = mHandledByAPZ; + wheelEvent.mDeltaMode = WheelEvent_Binding::DOM_DELTA_PIXEL; + + wheelEvent.mDeltaY = ComputeDeltaY(aWidget); + + wheelEvent.mLineOrPageDeltaY = mLineOrPageDeltaY; + + MOZ_ASSERT(mType == PINCHGESTURE_END || wheelEvent.mDeltaY != 0.0); + + return wheelEvent; +} + +double PinchGestureInput::ComputeDeltaY(nsIWidget* aWidget) const { +#if defined(XP_DARWIN) + // This converts the pinch gesture value to a fake wheel event that has the + // control key pressed so that pages can implement custom pinch gesture + // handling. It may seem strange that this doesn't use a wheel event with + // the deltaZ property set, but this matches Chrome's behavior as described + // at https://code.google.com/p/chromium/issues/detail?id=289887 + // + // The intent of the formula below is to produce numbers similar to Chrome's + // implementation of this feature. Chrome implements deltaY using the formula + // "-100 * log(1 + [event magnification])" which is unfortunately incorrect. + // All deltas for a single pinch gesture should sum to 0 if the start and end + // of a pinch gesture end up in the same place. This doesn't happen in Chrome + // because they followed Apple's misleading documentation, which implies that + // "1 + [event magnification]" is the scale factor. The scale factor is + // instead "pow(ratio, [event magnification])" so "[event magnification]" is + // already in log space. + // + // The multiplication by the backing scale factor below counteracts the + // division by the backing scale factor in WheelEvent. + + // We want to set deltaY to |-100.0 * M * GetDefaultScaleInternal()| where M + // is [event magnification] but [event magnification] is only available in the + // macOS widget code so we have to reverse engineer from mCurrentSpan and + // mPreviousSpan (which are derived from [event magnification]) to get it. + // Specifically, we know |mCurrentSpan == 100.0| and |mPreviousSpan == 100.0 * + // (1.0 - M)|. We can calculate deltaY by solving the mPreviousSpan equation + // for M in terms of mPreviousSpan and plugging that into to the formula for + // deltaY. + return (mPreviousSpan - 100.0) * + (aWidget ? aWidget->GetDefaultScaleInternal() : 1.f); +#else + // This calculation is based on what the Windows and Linux widget code does. + // Specifically, it creates a PinchGestureInput with |mCurrentSpan == 100.0 * + // currentScale| and |mPreviousSpan == 100.0 * lastScale| where currentScale + // is the scale from the current OS event and lastScale is the scale when the + // previous OS event happened. On macOS [event magnification] is a relative + // change in scale factor, ie if the scale factor changed from 1 to 1.1 it + // will be 0.1, similarly if it changed from 1 to 0.9 it will be -0.1. To + // calculate the relative scale change on Windows we would calculate |M = + // currentScale - lastScale = (mCurrentSpan-mPreviousSpan)/100| and use the + // same formula as the macOS code + // (|-100.0 * M * GetDefaultScaleInternal()|). + + return (mPreviousSpan - mCurrentSpan) * + (aWidget ? aWidget->GetDefaultScaleInternal() : 1.f); +#endif +} + +bool PinchGestureInput::SetLineOrPageDeltaY(nsIWidget* aWidget) { + double deltaY = ComputeDeltaY(aWidget); + if (deltaY == 0 && mType != PINCHGESTURE_END) { + return false; + } + gfx::IntPoint lineOrPageDelta = PinchGestureInput::GetIntegerDeltaForEvent( + (mType == PINCHGESTURE_START), 0, deltaY); + mLineOrPageDeltaY = lineOrPageDelta.y; + if (mLineOrPageDeltaY == 0) { + // For PINCHGESTURE_SCALE events, don't dispatch them. Note that the delta + // isn't lost; it remains in the accumulator in GetIntegerDeltaForEvent(). + if (mType == PINCHGESTURE_SCALE) { + return false; + } + // On Windows, drop PINCHGESTURE_START as well (the Windows widget code will + // defer the START event until we accumulate enough delta). + // The Linux widget code doesn't support this, so instead set the event's + // mLineOrPageDeltaY to the smallest nonzero amount in the relevant + // direction. + if (mType == PINCHGESTURE_START) { +#ifdef XP_WIN + return false; +#else + mLineOrPageDeltaY = (deltaY >= 0) ? 1 : -1; +#endif + } + // For PINCHGESTURE_END events, not dispatching a DOMMouseScroll for them is + // fine. + } + return true; +} + +/* static */ gfx::IntPoint PinchGestureInput::GetIntegerDeltaForEvent( + bool aIsStart, float x, float y) { + static gfx::Point sAccumulator(0.0f, 0.0f); + if (aIsStart) { + sAccumulator = gfx::Point(0.0f, 0.0f); + } + sAccumulator.x += x; + sAccumulator.y += y; + return gfx::IntPoint(TakeLargestInt(&sAccumulator.x), + TakeLargestInt(&sAccumulator.y)); +} + +TapGestureInput::TapGestureInput() + : InputData(TAPGESTURE_INPUT), mType(TAPGESTURE_LONG) {} + +TapGestureInput::TapGestureInput(TapGestureType aType, TimeStamp aTimeStamp, + const ScreenIntPoint& aPoint, + Modifiers aModifiers) + : InputData(TAPGESTURE_INPUT, aTimeStamp, aModifiers), + mType(aType), + mPoint(aPoint) {} + +TapGestureInput::TapGestureInput(TapGestureType aType, TimeStamp aTimeStamp, + const ParentLayerPoint& aLocalPoint, + Modifiers aModifiers) + : InputData(TAPGESTURE_INPUT, aTimeStamp, aModifiers), + mType(aType), + mLocalPoint(aLocalPoint) {} + +bool TapGestureInput::TransformToLocal( + const ScreenToParentLayerMatrix4x4& aTransform) { + Maybe<ParentLayerIntPoint> point = UntransformBy(aTransform, mPoint); + if (!point) { + return false; + } + mLocalPoint = *point; + return true; +} + +WidgetSimpleGestureEvent TapGestureInput::ToWidgetEvent( + nsIWidget* aWidget) const { + WidgetSimpleGestureEvent event(true, eTapGesture, aWidget); + + event.mTimeStamp = mTimeStamp; + event.mLayersId = mLayersId; + event.mRefPoint = ViewAs<LayoutDevicePixel>( + mPoint, + PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent); + event.mButtons = 0; + event.mClickCount = 1; + event.mModifiers = modifiers; + + return event; +} + +ScrollWheelInput::ScrollWheelInput() + : InputData(SCROLLWHEEL_INPUT), + mDeltaType(SCROLLDELTA_LINE), + mScrollMode(SCROLLMODE_INSTANT), + mHandledByAPZ(false), + mDeltaX(0.0), + mDeltaY(0.0), + mLineOrPageDeltaX(0), + mLineOrPageDeltaY(0), + mScrollSeriesNumber(0), + mUserDeltaMultiplierX(1.0), + mUserDeltaMultiplierY(1.0), + mMayHaveMomentum(false), + mIsMomentum(false), + mAPZAction(APZWheelAction::Scroll) {} + +ScrollWheelInput::ScrollWheelInput( + TimeStamp aTimeStamp, Modifiers aModifiers, ScrollMode aScrollMode, + ScrollDeltaType aDeltaType, const ScreenPoint& aOrigin, double aDeltaX, + double aDeltaY, bool aAllowToOverrideSystemScrollSpeed, + WheelDeltaAdjustmentStrategy aWheelDeltaAdjustmentStrategy) + : InputData(SCROLLWHEEL_INPUT, aTimeStamp, aModifiers), + mDeltaType(aDeltaType), + mScrollMode(aScrollMode), + mOrigin(aOrigin), + mHandledByAPZ(false), + mDeltaX(aDeltaX), + mDeltaY(aDeltaY), + mLineOrPageDeltaX(0), + mLineOrPageDeltaY(0), + mScrollSeriesNumber(0), + mUserDeltaMultiplierX(1.0), + mUserDeltaMultiplierY(1.0), + mMayHaveMomentum(false), + mIsMomentum(false), + mAllowToOverrideSystemScrollSpeed(aAllowToOverrideSystemScrollSpeed), + mWheelDeltaAdjustmentStrategy(aWheelDeltaAdjustmentStrategy), + mAPZAction(APZWheelAction::Scroll) {} + +ScrollWheelInput::ScrollWheelInput(const WidgetWheelEvent& aWheelEvent) + : InputData(SCROLLWHEEL_INPUT, aWheelEvent.mTimeStamp, + aWheelEvent.mModifiers), + mDeltaType(DeltaTypeForDeltaMode(aWheelEvent.mDeltaMode)), + mScrollMode(SCROLLMODE_INSTANT), + mHandledByAPZ(aWheelEvent.mFlags.mHandledByAPZ), + mDeltaX(aWheelEvent.mDeltaX), + mDeltaY(aWheelEvent.mDeltaY), + mWheelTicksX(aWheelEvent.mWheelTicksX), + mWheelTicksY(aWheelEvent.mWheelTicksX), + mLineOrPageDeltaX(aWheelEvent.mLineOrPageDeltaX), + mLineOrPageDeltaY(aWheelEvent.mLineOrPageDeltaY), + mScrollSeriesNumber(0), + mUserDeltaMultiplierX(1.0), + mUserDeltaMultiplierY(1.0), + mMayHaveMomentum(aWheelEvent.mMayHaveMomentum), + mIsMomentum(aWheelEvent.mIsMomentum), + mAllowToOverrideSystemScrollSpeed( + aWheelEvent.mAllowToOverrideSystemScrollSpeed), + mWheelDeltaAdjustmentStrategy(WheelDeltaAdjustmentStrategy::eNone), + mAPZAction(APZWheelAction::Scroll) { + mOrigin = ScreenPoint(ViewAs<ScreenPixel>( + aWheelEvent.mRefPoint, + PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent)); +} + +ScrollWheelInput::ScrollDeltaType ScrollWheelInput::DeltaTypeForDeltaMode( + uint32_t aDeltaMode) { + switch (aDeltaMode) { + case WheelEvent_Binding::DOM_DELTA_LINE: + return SCROLLDELTA_LINE; + case WheelEvent_Binding::DOM_DELTA_PAGE: + return SCROLLDELTA_PAGE; + case WheelEvent_Binding::DOM_DELTA_PIXEL: + return SCROLLDELTA_PIXEL; + default: + MOZ_CRASH(); + } + return SCROLLDELTA_LINE; +} + +uint32_t ScrollWheelInput::DeltaModeForDeltaType(ScrollDeltaType aDeltaType) { + switch (aDeltaType) { + case ScrollWheelInput::SCROLLDELTA_LINE: + return WheelEvent_Binding::DOM_DELTA_LINE; + case ScrollWheelInput::SCROLLDELTA_PAGE: + return WheelEvent_Binding::DOM_DELTA_PAGE; + case ScrollWheelInput::SCROLLDELTA_PIXEL: + default: + return WheelEvent_Binding::DOM_DELTA_PIXEL; + } +} + +ScrollUnit ScrollWheelInput::ScrollUnitForDeltaType( + ScrollDeltaType aDeltaType) { + switch (aDeltaType) { + case SCROLLDELTA_LINE: + return ScrollUnit::LINES; + case SCROLLDELTA_PAGE: + return ScrollUnit::PAGES; + case SCROLLDELTA_PIXEL: + return ScrollUnit::DEVICE_PIXELS; + default: + MOZ_CRASH(); + } + return ScrollUnit::LINES; +} + +WidgetWheelEvent ScrollWheelInput::ToWidgetEvent(nsIWidget* aWidget) const { + WidgetWheelEvent wheelEvent(true, eWheel, aWidget); + wheelEvent.mModifiers = this->modifiers; + wheelEvent.mTimeStamp = mTimeStamp; + wheelEvent.mLayersId = mLayersId; + wheelEvent.mRefPoint = RoundedToInt(ViewAs<LayoutDevicePixel>( + mOrigin, + PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent)); + wheelEvent.mButtons = 0; + wheelEvent.mDeltaMode = DeltaModeForDeltaType(mDeltaType); + wheelEvent.mMayHaveMomentum = mMayHaveMomentum; + wheelEvent.mIsMomentum = mIsMomentum; + wheelEvent.mDeltaX = mDeltaX; + wheelEvent.mDeltaY = mDeltaY; + wheelEvent.mWheelTicksX = mWheelTicksX; + wheelEvent.mWheelTicksY = mWheelTicksY; + wheelEvent.mLineOrPageDeltaX = mLineOrPageDeltaX; + wheelEvent.mLineOrPageDeltaY = mLineOrPageDeltaY; + wheelEvent.mAllowToOverrideSystemScrollSpeed = + mAllowToOverrideSystemScrollSpeed; + wheelEvent.mFlags.mHandledByAPZ = mHandledByAPZ; + wheelEvent.mFocusSequenceNumber = mFocusSequenceNumber; + return wheelEvent; +} + +bool ScrollWheelInput::TransformToLocal( + const ScreenToParentLayerMatrix4x4& aTransform) { + Maybe<ParentLayerPoint> point = UntransformBy(aTransform, mOrigin); + if (!point) { + return false; + } + mLocalOrigin = *point; + return true; +} + +bool ScrollWheelInput::IsCustomizedByUserPrefs() const { + return mUserDeltaMultiplierX != 1.0 || mUserDeltaMultiplierY != 1.0; +} + +KeyboardInput::KeyboardInput(const WidgetKeyboardEvent& aEvent) + : InputData(KEYBOARD_INPUT, aEvent.mTimeStamp, aEvent.mModifiers), + mKeyCode(aEvent.mKeyCode), + mCharCode(aEvent.mCharCode), + mHandledByAPZ(false) { + switch (aEvent.mMessage) { + case eKeyPress: { + mType = KeyboardInput::KEY_PRESS; + break; + } + case eKeyUp: { + mType = KeyboardInput::KEY_UP; + break; + } + case eKeyDown: { + mType = KeyboardInput::KEY_DOWN; + break; + } + default: + mType = KeyboardInput::KEY_OTHER; + break; + } + + aEvent.GetShortcutKeyCandidates(mShortcutCandidates); +} + +KeyboardInput::KeyboardInput() + : InputData(KEYBOARD_INPUT), + mType(KEY_DOWN), + mKeyCode(0), + mCharCode(0), + mHandledByAPZ(false) {} + +} // namespace mozilla |