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"
namespace mozilla {
using namespace dom;
already_AddRefed<Touch> SingleTouchData::ToNewDOMTouch() const
{
NS_ABORT_IF_FALSE(NS_IsMainThread(),
"Can only create dom::Touch instances on main thread");
nsRefPtr<Touch> touch = new Touch(mIdentifier,
nsIntPoint(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)
{
NS_ABORT_IF_FALSE(NS_IsMainThread(),
"Can only copy from WidgetTouchEvent on main thread");
switch (aTouchEvent.message) {
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
{
NS_ABORT_IF_FALSE(NS_IsMainThread(),
"Can only convert To WidgetTouchEvent on main thread");
uint32_t touchType = NS_EVENT_NULL;
switch (mType) {
case MULTITOUCH_START:
touchType = NS_TOUCH_START;
break;
case MULTITOUCH_MOVE:
touchType = NS_TOUCH_MOVE;
break;
case MULTITOUCH_END:
touchType = NS_TOUCH_END;
break;
case MULTITOUCH_CANCEL:
touchType = NS_TOUCH_CANCEL;
break;
default:
MOZ_ASSERT_UNREACHABLE("Did not assign a type to WidgetTouchEvent in MultiTouchInput");
break;
}
WidgetTouchEvent event(true, touchType, aWidget);
if (touchType == NS_EVENT_NULL) {
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;
}
// 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)
{
NS_ABORT_IF_FALSE(NS_IsMainThread(),
"Can only copy from WidgetMouseEvent on main thread");
switch (aMouseEvent.message) {
case NS_MOUSE_BUTTON_DOWN:
mType = MULTITOUCH_START;
break;
case NS_MOUSE_MOVE:
mType = MULTITOUCH_MOVE;
break;
case NS_MOUSE_BUTTON_UP:
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 NS_MOUSE_EXIT:
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));
}
}