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");
nsRefPtr<Touch> touch = new Touch(mIdentifier,
LayoutDeviceIntPoint(mScreenPoint.x, mScreenPoint.y),
nsIntPoint(mRadius.width, mRadius.height),
mRotationAngle,
mForce);
return touch.forget();
}
MultiTouchInput::MultiTouchInput(const WidgetTouchEvent& aTouchEvent)
: InputData(MULTITOUCH_INPUT, aTouchEvent.time, aTouchEvent.timeStamp,
aTouchEvent.modifiers)
{
MOZ_ASSERT(NS_IsMainThread(),
"Can only copy from WidgetTouchEvent on main thread");
switch (aTouchEvent.mMessage) {
case NS_TOUCH_START:
mType = MULTITOUCH_START;
break;
case NS_TOUCH_MOVE:
mType = MULTITOUCH_MOVE;
break;
case NS_TOUCH_END:
mType = MULTITOUCH_END;
break;
case NS_TOUCH_CANCEL:
mType = MULTITOUCH_CANCEL;
break;
default:
MOZ_ASSERT_UNREACHABLE("Did not assign a type to a MultiTouchInput");
break;
}
for (size_t i = 0; i < aTouchEvent.touches.Length(); i++) {
const Touch* domTouch = aTouchEvent.touches[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,
ScreenIntPoint::FromUnknownPoint(
gfx::IntPoint(domTouch->mRefPoint.x,
domTouch->mRefPoint.y)),
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 = NS_TOUCH_START;
break;
case MULTITOUCH_MOVE:
touchEventMessage = NS_TOUCH_MOVE;
break;
case MULTITOUCH_END:
touchEventMessage = NS_TOUCH_END;
break;
case MULTITOUCH_CANCEL:
touchEventMessage = NS_TOUCH_CANCEL;
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.modifiers = this->modifiers;
event.time = this->mTime;
event.timeStamp = this->mTimeStamp;
for (size_t i = 0; i < mTouches.Length(); i++) {
*event.touches.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.refPoint.x = firstTouch.mScreenPoint.x;
event.refPoint.y = firstTouch.mScreenPoint.y;
event.time = mTime;
event.button = WidgetMouseEvent::eLeftButton;
event.inputSource = nsIDOMMouseEvent::MOZ_SOURCE_TOUCH;
event.modifiers = modifiers;
if (mouseEventMessage != eMouseMove) {
event.clickCount = 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.time, aMouseEvent.timeStamp,
aMouseEvent.modifiers)
{
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,
ScreenIntPoint::FromUnknownPoint(
gfx::IntPoint(aMouseEvent.refPoint.x,
aMouseEvent.refPoint.y)),
ScreenSize(1, 1),
180.0f,
1.0f));
}
bool
MultiTouchInput::TransformToLocal(const gfx::Matrix4x4& aTransform)
{
for (size_t i = 0; i < mTouches.Length(); i++) {
Maybe<ParentLayerIntPoint> point = UntransformTo<ParentLayerPixel>(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.modifiers = this->modifiers;
wheelEvent.time = mTime;
wheelEvent.timeStamp = mTimeStamp;
wheelEvent.refPoint =
RoundedToInt(ViewAs<LayoutDevicePixel>(mPanStartPoint,
PixelCastJustification::LayoutDeviceToScreenForUntransformedEvent));
wheelEvent.buttons = 0;
wheelEvent.deltaMode = nsIDOMWheelEvent::DOM_DELTA_PIXEL;
wheelEvent.isMomentum = IsMomentum();
wheelEvent.lineOrPageDeltaX = mLineOrPageDeltaX;
wheelEvent.lineOrPageDeltaY = mLineOrPageDeltaY;
wheelEvent.deltaX = mPanDisplacement.x;
wheelEvent.deltaY = mPanDisplacement.y;
wheelEvent.mFlags.mHandledByAPZ = mHandledByAPZ;
return wheelEvent;
}
bool
PanGestureInput::TransformToLocal(const gfx::Matrix4x4& aTransform)
{
Maybe<ParentLayerPoint> panStartPoint = UntransformTo<ParentLayerPixel>(aTransform, mPanStartPoint);
if (!panStartPoint) {
return false;
}
mLocalPanStartPoint = *panStartPoint;
Maybe<ParentLayerPoint> panDisplacement = UntransformVector<ParentLayerPixel>(aTransform, mPanDisplacement, mPanStartPoint);
if (!panDisplacement) {
return false;
}
mLocalPanDisplacement = *panDisplacement;
return true;
}
bool
PinchGestureInput::TransformToLocal(const gfx::Matrix4x4& aTransform)
{
Maybe<ParentLayerPoint> point = UntransformTo<ParentLayerPixel>(aTransform, mFocusPoint);
if (!point) {
return false;
}
mLocalFocusPoint = *point;
return true;
}
bool
TapGestureInput::TransformToLocal(const gfx::Matrix4x4& aTransform)
{
Maybe<ParentLayerIntPoint> point = UntransformTo<ParentLayerPixel>(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_PIXEL:
default:
return nsIDOMWheelEvent::DOM_DELTA_PIXEL;
}
}
WidgetWheelEvent
ScrollWheelInput::ToWidgetWheelEvent(nsIWidget* aWidget) const
{
WidgetWheelEvent wheelEvent(true, eWheel, aWidget);
wheelEvent.modifiers = this->modifiers;
wheelEvent.time = mTime;
wheelEvent.timeStamp = mTimeStamp;
wheelEvent.refPoint =
RoundedToInt(ViewAs<LayoutDevicePixel>(mOrigin,
PixelCastJustification::LayoutDeviceToScreenForUntransformedEvent));
wheelEvent.buttons = 0;
wheelEvent.deltaMode = DeltaModeForDeltaType(mDeltaType);
wheelEvent.isMomentum = mIsMomentum;
wheelEvent.deltaX = mDeltaX;
wheelEvent.deltaY = mDeltaY;
wheelEvent.lineOrPageDeltaX = mLineOrPageDeltaX;
wheelEvent.lineOrPageDeltaY = mLineOrPageDeltaY;
wheelEvent.mFlags.mHandledByAPZ = mHandledByAPZ;
return wheelEvent;
}
bool
ScrollWheelInput::TransformToLocal(const gfx::Matrix4x4& aTransform)
{
Maybe<ParentLayerPoint> point = UntransformTo<ParentLayerPixel>(aTransform, mOrigin);
if (!point) {
return false;
}
mLocalOrigin = *point;
return true;
}
} // namespace mozilla