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gecko-dev/widget/InputData.cpp

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/* -*- 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/Touch.h"
#include "nsDebug.h"
#include "nsThreadUtils.h"
#include "mozilla/MouseEvents.h"
#include "mozilla/TouchEvents.h"
#include "UnitTransforms.h"
namespace mozilla {
using namespace dom;
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);
return touch.forget();
}
MouseInput::MouseInput(const WidgetMouseEventBase& aMouseEvent)
: InputData(MOUSE_INPUT, aMouseEvent.mTime, aMouseEvent.mTimeStamp,
aMouseEvent.mModifiers)
, mType(MOUSE_NONE)
, mButtonType(NONE)
, mInputSource(aMouseEvent.inputSource)
, mButtons(aMouseEvent.buttons)
, mHandledByAPZ(aMouseEvent.mFlags.mHandledByAPZ)
{
MOZ_ASSERT(NS_IsMainThread(),
"Can only copy from WidgetTouchEvent on main thread");
mButtonType = NONE;
switch (aMouseEvent.button) {
case WidgetMouseEventBase::eLeftButton:
mButtonType = MouseInput::LEFT_BUTTON;
break;
case WidgetMouseEventBase::eMiddleButton:
mButtonType = MouseInput::MIDDLE_BUTTON;
break;
case WidgetMouseEventBase::eRightButton:
mButtonType = MouseInput::RIGHT_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;
default:
MOZ_ASSERT_UNREACHABLE("Mouse event type not supported");
break;
}
mOrigin =
ScreenPoint(ViewAs<ScreenPixel>(aMouseEvent.mRefPoint,
PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent));
}
bool
MouseInput::TransformToLocal(const ScreenToParentLayerMatrix4x4& aTransform)
{
Maybe<ParentLayerPoint> point = UntransformBy(aTransform, mOrigin);
if (!point) {
return false;
}
mLocalOrigin = *point;
return true;
}
WidgetMouseEvent
MouseInput::ToWidgetMouseEvent(nsIWidget* aWidget) const
{
MOZ_ASSERT(NS_IsMainThread(),
"Can only convert To WidgetTouchEvent on main thread");
EventMessage msg = eVoidEvent;
uint32_t clickCount = 0;
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;
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::LEFT_BUTTON:
event.button = WidgetMouseEventBase::eLeftButton;
break;
case MouseInput::MIDDLE_BUTTON:
event.button = WidgetMouseEventBase::eMiddleButton;
break;
case MouseInput::RIGHT_BUTTON:
event.button = WidgetMouseEventBase::eRightButton;
break;
case MouseInput::NONE:
default:
break;
}
event.buttons = mButtons;
event.mModifiers = modifiers;
event.mTime = mTime;
event.mTimeStamp = mTimeStamp;
event.mFlags.mHandledByAPZ = mHandledByAPZ;
event.mRefPoint =
RoundedToInt(ViewAs<LayoutDevicePixel>(mOrigin,
PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent));
event.mClickCount = clickCount;
event.inputSource = mInputSource;
event.mIgnoreRootScrollFrame = true;
return event;
}
MultiTouchInput::MultiTouchInput(const WidgetTouchEvent& aTouchEvent)
: InputData(MULTITOUCH_INPUT, aTouchEvent.mTime, aTouchEvent.mTimeStamp,
aTouchEvent.mModifiers)
, mHandledByAPZ(aTouchEvent.mFlags.mHandledByAPZ)
{
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;
}
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();
int32_t radiusY = domTouch->RadiusY();
float rotationAngle = domTouch->RotationAngle();
float force = domTouch->Force();
SingleTouchData data(identifier,
ViewAs<ScreenPixel>(domTouch->mRefPoint,
PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent),
ScreenSize(radiusX, radiusY),
rotationAngle,
force);
mTouches.AppendElement(data);
}
}
WidgetTouchEvent
MultiTouchInput::ToWidgetTouchEvent(nsIWidget* aWidget) const
{
MOZ_ASSERT(NS_IsMainThread(),
"Can only convert To WidgetTouchEvent on main thread");
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.mTime = this->mTime;
event.mTimeStamp = this->mTimeStamp;
event.mFlags.mHandledByAPZ = mHandledByAPZ;
for (size_t i = 0; i < mTouches.Length(); i++) {
*event.mTouches.AppendElement() = mTouches[i].ToNewDOMTouch();
}
return event;
}
WidgetMouseEvent
MultiTouchInput::ToWidgetMouseEvent(nsIWidget* aWidget) const
{
MOZ_ASSERT(NS_IsMainThread(),
"Can only convert To WidgetMouseEvent on main thread");
EventMessage mouseEventMessage = eVoidEvent;
switch (mType) {
case MultiTouchInput::MULTITOUCH_START:
mouseEventMessage = eMouseDown;
break;
case MultiTouchInput::MULTITOUCH_MOVE:
mouseEventMessage = eMouseMove;
break;
case MultiTouchInput::MULTITOUCH_CANCEL:
case MultiTouchInput::MULTITOUCH_END:
mouseEventMessage = eMouseUp;
break;
default:
MOZ_ASSERT_UNREACHABLE("Did not assign a type to WidgetMouseEvent");
break;
}
WidgetMouseEvent event(true, mouseEventMessage, aWidget,
WidgetMouseEvent::eReal, WidgetMouseEvent::eNormal);
const SingleTouchData& firstTouch = mTouches[0];
event.mRefPoint.x = firstTouch.mScreenPoint.x;
event.mRefPoint.y = firstTouch.mScreenPoint.y;
event.mTime = mTime;
event.button = WidgetMouseEvent::eLeftButton;
event.inputSource = nsIDOMMouseEvent::MOZ_SOURCE_TOUCH;
event.mModifiers = modifiers;
event.mFlags.mHandledByAPZ = mHandledByAPZ;
if (mouseEventMessage != eMouseMove) {
event.mClickCount = 1;
}
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;
}
// This conversion from WidgetMouseEvent to MultiTouchInput is needed because on
// the B2G emulator we can only receive mouse events, but we need to be able
// to pan correctly. To do this, we convert the events into a format that the
// panning code can handle. This code is very limited and only supports
// SingleTouchData. It also sends garbage for the identifier, radius, force
// and rotation angle.
MultiTouchInput::MultiTouchInput(const WidgetMouseEvent& aMouseEvent)
: InputData(MULTITOUCH_INPUT, aMouseEvent.mTime, aMouseEvent.mTimeStamp,
aMouseEvent.mModifiers)
, mHandledByAPZ(aMouseEvent.mFlags.mHandledByAPZ)
{
MOZ_ASSERT(NS_IsMainThread(),
"Can only copy from WidgetMouseEvent on main thread");
switch (aMouseEvent.mMessage) {
case eMouseDown:
mType = MULTITOUCH_START;
break;
case eMouseMove:
mType = MULTITOUCH_MOVE;
break;
case eMouseUp:
mType = MULTITOUCH_END;
break;
// The mouse pointer has been interrupted in an implementation-specific
// manner, such as a synchronous event or action cancelling the touch, or a
// touch point leaving the document window and going into a non-document
// area capable of handling user interactions.
case eMouseExitFromWidget:
mType = MULTITOUCH_CANCEL;
break;
default:
NS_WARNING("Did not assign a type to a MultiTouchInput");
break;
}
mTouches.AppendElement(SingleTouchData(0,
ViewAs<ScreenPixel>(aMouseEvent.mRefPoint,
PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent),
ScreenSize(1, 1),
180.0f,
1.0f));
}
bool
MultiTouchInput::TransformToLocal(const ScreenToParentLayerMatrix4x4& aTransform)
{
for (size_t i = 0; i < mTouches.Length(); i++) {
Maybe<ParentLayerIntPoint> point = UntransformBy(aTransform, mTouches[i].mScreenPoint);
if (!point) {
return false;
}
mTouches[i].mLocalScreenPoint = *point;
}
return true;
}
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::ToWidgetWheelEvent(nsIWidget* aWidget) const
{
WidgetWheelEvent wheelEvent(true, eWheel, aWidget);
wheelEvent.mModifiers = this->modifiers;
wheelEvent.mTime = mTime;
wheelEvent.mTimeStamp = mTimeStamp;
wheelEvent.mRefPoint =
RoundedToInt(ViewAs<LayoutDevicePixel>(mPanStartPoint,
PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent));
wheelEvent.buttons = 0;
wheelEvent.mDeltaMode = nsIDOMWheelEvent::DOM_DELTA_PIXEL;
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;
return wheelEvent;
}
bool
PanGestureInput::TransformToLocal(const ScreenToParentLayerMatrix4x4& aTransform)
{
Maybe<ParentLayerPoint> panStartPoint = UntransformBy(aTransform, mPanStartPoint);
if (!panStartPoint) {
return false;
}
mLocalPanStartPoint = *panStartPoint;
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);
}
bool
PinchGestureInput::TransformToLocal(const ScreenToParentLayerMatrix4x4& aTransform)
{
Maybe<ParentLayerPoint> point = UntransformBy(aTransform, mFocusPoint);
if (!point) {
return false;
}
mLocalFocusPoint = *point;
return true;
}
bool
TapGestureInput::TransformToLocal(const ScreenToParentLayerMatrix4x4& aTransform)
{
Maybe<ParentLayerIntPoint> point = UntransformBy(aTransform, mPoint);
if (!point) {
return false;
}
mLocalPoint = *point;
return true;
}
static uint32_t
DeltaModeForDeltaType(ScrollWheelInput::ScrollDeltaType aDeltaType)
{
switch (aDeltaType) {
case ScrollWheelInput::SCROLLDELTA_LINE:
return nsIDOMWheelEvent::DOM_DELTA_LINE;
case ScrollWheelInput::SCROLLDELTA_PAGE:
return nsIDOMWheelEvent::DOM_DELTA_PAGE;
case ScrollWheelInput::SCROLLDELTA_PIXEL:
default:
return nsIDOMWheelEvent::DOM_DELTA_PIXEL;
}
}
ScrollWheelInput::ScrollWheelInput(const WidgetWheelEvent& aWheelEvent)
: InputData(SCROLLWHEEL_INPUT,
aWheelEvent.mTime,
aWheelEvent.mTimeStamp,
aWheelEvent.mModifiers)
, mDeltaType(DeltaTypeForDeltaMode(aWheelEvent.mDeltaMode))
, mScrollMode(SCROLLMODE_INSTANT)
, mHandledByAPZ(aWheelEvent.mFlags.mHandledByAPZ)
, mDeltaX(aWheelEvent.mDeltaX)
, mDeltaY(aWheelEvent.mDeltaY)
, mLineOrPageDeltaX(aWheelEvent.mLineOrPageDeltaX)
, mLineOrPageDeltaY(aWheelEvent.mLineOrPageDeltaY)
, mScrollSeriesNumber(0)
, mUserDeltaMultiplierX(1.0)
, mUserDeltaMultiplierY(1.0)
, mMayHaveMomentum(aWheelEvent.mMayHaveMomentum)
, mIsMomentum(aWheelEvent.mIsMomentum)
, mAllowToOverrideSystemScrollSpeed(
aWheelEvent.mAllowToOverrideSystemScrollSpeed)
{
mOrigin =
ScreenPoint(ViewAs<ScreenPixel>(aWheelEvent.mRefPoint,
PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent));
}
WidgetWheelEvent
ScrollWheelInput::ToWidgetWheelEvent(nsIWidget* aWidget) const
{
WidgetWheelEvent wheelEvent(true, eWheel, aWidget);
wheelEvent.mModifiers = this->modifiers;
wheelEvent.mTime = mTime;
wheelEvent.mTimeStamp = mTimeStamp;
wheelEvent.mRefPoint =
RoundedToInt(ViewAs<LayoutDevicePixel>(mOrigin,
PixelCastJustification::LayoutDeviceIsScreenForUntransformedEvent));
wheelEvent.buttons = 0;
wheelEvent.mDeltaMode = DeltaModeForDeltaType(mDeltaType);
wheelEvent.mMayHaveMomentum = mMayHaveMomentum;
wheelEvent.mIsMomentum = mIsMomentum;
wheelEvent.mDeltaX = mDeltaX;
wheelEvent.mDeltaY = mDeltaY;
wheelEvent.mLineOrPageDeltaX = mLineOrPageDeltaX;
wheelEvent.mLineOrPageDeltaY = mLineOrPageDeltaY;
wheelEvent.mAllowToOverrideSystemScrollSpeed =
mAllowToOverrideSystemScrollSpeed;
wheelEvent.mFlags.mHandledByAPZ = mHandledByAPZ;
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;
}
} // namespace mozilla
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