nsEventStatus GestureEventListener::HandleInputEvent(const InputData& aEvent)
{
if (aEvent.mInputType != MULTITOUCH_INPUT) {
return nsEventStatus_eIgnore;
}
const MultiTouchInput& event = static_cast<const MultiTouchInput&>(aEvent);
switch (event.mType)
{
case MultiTouchInput::MULTITOUCH_START:
case MultiTouchInput::MULTITOUCH_ENTER: {
for (size_t i = 0; i < event.mTouches.Length(); i++) {
bool foundAlreadyExistingTouch = false;
for (size_t j = 0; j < mTouches.Length(); j++) {
if (mTouches[j].mIdentifier == event.mTouches[i].mIdentifier) {
foundAlreadyExistingTouch = true;
}
}
NS_WARN_IF_FALSE(!foundAlreadyExistingTouch, "Tried to add a touch that already exists");
// If we didn't find a touch in our list that matches this, then add it.
// If it already existed, we don't want to add it twice because that
// messes with our touch move/end code.
if (!foundAlreadyExistingTouch) {
mTouches.AppendElement(event.mTouches[i]);
}
}
if (mTouches.Length() == 2) {
// Another finger has been added; it can't be a tap anymore.
HandleTapCancel(event);
}
break;
}
case MultiTouchInput::MULTITOUCH_MOVE: {
// If we move at all, just bail out of the tap. We need to change this so
// that there's some tolerance in the future.
HandleTapCancel(event);
bool foundAlreadyExistingTouch = false;
for (size_t i = 0; i < mTouches.Length(); i++) {
for (size_t j = 0; j < event.mTouches.Length(); j++) {
if (mTouches[i].mIdentifier == event.mTouches[j].mIdentifier) {
foundAlreadyExistingTouch = true;
mTouches[i] = event.mTouches[j];
}
}
}
NS_WARN_IF_FALSE(foundAlreadyExistingTouch, "Touch moved, but not in list");
break;
}
case MultiTouchInput::MULTITOUCH_END:
case MultiTouchInput::MULTITOUCH_LEAVE: {
bool foundAlreadyExistingTouch = false;
for (size_t i = 0; i < event.mTouches.Length() && !foundAlreadyExistingTouch; i++) {
for (size_t j = 0; j < mTouches.Length() && !foundAlreadyExistingTouch; j++) {
if (event.mTouches[i].mIdentifier == mTouches[j].mIdentifier) {
foundAlreadyExistingTouch = true;
mTouches.RemoveElementAt(j);
}
}
}
NS_WARN_IF_FALSE(foundAlreadyExistingTouch, "Touch ended, but not in list");
if (event.mTime - mTouchStartTime <= MAX_TAP_TIME) {
// XXX: Incorrect use of the tap event. In the future, we want to send this
// on NS_TOUCH_END, then have a short timer afterwards which sends
// SingleTapConfirmed. Since we don't have double taps yet, this is fine for
// now.
if (HandleSingleTapUpEvent(event) == nsEventStatus_eConsumeNoDefault) {
return nsEventStatus_eConsumeNoDefault;
}
if (HandleSingleTapConfirmedEvent(event) == nsEventStatus_eConsumeNoDefault) {
return nsEventStatus_eConsumeNoDefault;
}
}
break;
}
case MultiTouchInput::MULTITOUCH_CANCEL:
// This gets called if there's a touch that has to bail for weird reasons
// like pinching and then moving away from the window that the pinch was
// started in without letting go of the screen.
HandlePinchGestureEvent(event, true);
break;
}
return HandlePinchGestureEvent(event, false);
}
nsEventStatus GestureEventListener::HandleInputEvent(const MultiTouchInput& aEvent)
{
// Cache the current event since it may become the single or long tap that we
// send.
mLastTouchInput = aEvent;
switch (aEvent.mType)
{
case MultiTouchInput::MULTITOUCH_START:
case MultiTouchInput::MULTITOUCH_ENTER: {
for (size_t i = 0; i < aEvent.mTouches.Length(); i++) {
bool foundAlreadyExistingTouch = false;
for (size_t j = 0; j < mTouches.Length(); j++) {
if (mTouches[j].mIdentifier == aEvent.mTouches[i].mIdentifier) {
foundAlreadyExistingTouch = true;
break;
}
}
// If we didn't find a touch in our list that matches this, then add it.
if (!foundAlreadyExistingTouch) {
mTouches.AppendElement(aEvent.mTouches[i]);
}
}
size_t length = mTouches.Length();
if (length == 1) {
mTapStartTime = aEvent.mTime;
mTouchStartPosition = aEvent.mTouches[0].mScreenPoint;
if (mState == GESTURE_NONE) {
mState = GESTURE_WAITING_SINGLE_TAP;
mLongTapTimeoutTask =
NewRunnableMethod(this, &GestureEventListener::TimeoutLongTap);
mAsyncPanZoomController->PostDelayedTask(
mLongTapTimeoutTask,
Preferences::GetInt("ui.click_hold_context_menus.delay", 500));
}
} else if (length == 2) {
// Another finger has been added; it can't be a tap anymore.
HandleTapCancel(aEvent);
}
break;
}
case MultiTouchInput::MULTITOUCH_MOVE: {
// If we move too much, bail out of the tap.
ScreenIntPoint delta = aEvent.mTouches[0].mScreenPoint - mTouchStartPosition;
if (mTouches.Length() == 1 &&
NS_hypot(delta.x, delta.y) > AsyncPanZoomController::GetTouchStartTolerance())
{
HandleTapCancel(aEvent);
}
size_t eventTouchesMatched = 0;
for (size_t i = 0; i < mTouches.Length(); i++) {
bool isTouchRemoved = true;
for (size_t j = 0; j < aEvent.mTouches.Length(); j++) {
if (mTouches[i].mIdentifier == aEvent.mTouches[j].mIdentifier) {
eventTouchesMatched++;
isTouchRemoved = false;
mTouches[i] = aEvent.mTouches[j];
}
}
if (isTouchRemoved) {
// this touch point was lifted, so remove it from our list
mTouches.RemoveElementAt(i);
i--;
}
}
NS_WARN_IF_FALSE(eventTouchesMatched == aEvent.mTouches.Length(), "Touch moved, but not in list");
break;
}
case MultiTouchInput::MULTITOUCH_END:
case MultiTouchInput::MULTITOUCH_LEAVE: {
for (size_t i = 0; i < aEvent.mTouches.Length(); i++) {
bool foundAlreadyExistingTouch = false;
for (size_t j = 0; j < mTouches.Length() && !foundAlreadyExistingTouch; j++) {
if (aEvent.mTouches[i].mIdentifier == mTouches[j].mIdentifier) {
foundAlreadyExistingTouch = true;
mTouches.RemoveElementAt(j);
}
}
NS_WARN_IF_FALSE(foundAlreadyExistingTouch, "Touch ended, but not in list");
}
if (mState == GESTURE_WAITING_DOUBLE_TAP) {
CancelDoubleTapTimeoutTask();
if (mTapStartTime - mLastTapEndTime > MAX_TAP_TIME ||
aEvent.mTime - mTapStartTime > MAX_TAP_TIME) {
// Either the time between taps or the last tap took too long
// confirm previous tap and handle current tap seperately
TimeoutDoubleTap();
mState = GESTURE_WAITING_SINGLE_TAP;
} else {
// We were waiting for a double tap and it has arrived.
HandleDoubleTap(aEvent);
mState = GESTURE_NONE;
}
}
if (mState == GESTURE_LONG_TAP_UP) {
HandleLongTapUpEvent(aEvent);
mState = GESTURE_NONE;
} else if (mState == GESTURE_WAITING_SINGLE_TAP &&
aEvent.mTime - mTapStartTime > MAX_TAP_TIME) {
// Extended taps are immediately dispatched as single taps
CancelLongTapTimeoutTask();
HandleSingleTapConfirmedEvent(aEvent);
mState = GESTURE_NONE;
} else if (mState == GESTURE_WAITING_SINGLE_TAP) {
CancelLongTapTimeoutTask();
nsEventStatus tapupEvent = HandleSingleTapUpEvent(aEvent);
if (tapupEvent == nsEventStatus_eIgnore) {
// We were not waiting for anything but a single tap has happened that
// may turn into a double tap. Wait a while and if it doesn't turn into
// a double tap, send a single tap instead.
mState = GESTURE_WAITING_DOUBLE_TAP;
mDoubleTapTimeoutTask =
NewRunnableMethod(this, &GestureEventListener::TimeoutDoubleTap);
mAsyncPanZoomController->PostDelayedTask(
mDoubleTapTimeoutTask,
MAX_TAP_TIME);
} else if (tapupEvent == nsEventStatus_eConsumeNoDefault) {
// We sent the tapup into content without waiting for a double tap
mState = GESTURE_NONE;
}
}
mLastTapEndTime = aEvent.mTime;
if (!mTouches.Length()) {
mSpanChange = 0.0f;
}
break;
}
case MultiTouchInput::MULTITOUCH_CANCEL:
// FIXME: we should probably clear a bunch of gesture state here
break;
}
return HandlePinchGestureEvent(aEvent);
}
nsEventStatus GestureEventListener::HandleInputEvent(const InputData& aEvent)
{
if (aEvent.mInputType != MULTITOUCH_INPUT) {
return nsEventStatus_eIgnore;
}
const MultiTouchInput& event = static_cast<const MultiTouchInput&>(aEvent);
// Cache the current event since it may become the single or long tap that we
// send.
mLastTouchInput = event;
switch (event.mType)
{
case MultiTouchInput::MULTITOUCH_START:
case MultiTouchInput::MULTITOUCH_ENTER: {
for (size_t i = 0; i < event.mTouches.Length(); i++) {
bool foundAlreadyExistingTouch = false;
for (size_t j = 0; j < mTouches.Length(); j++) {
if (mTouches[j].mIdentifier == event.mTouches[i].mIdentifier) {
foundAlreadyExistingTouch = true;
}
}
NS_WARN_IF_FALSE(!foundAlreadyExistingTouch, "Tried to add a touch that already exists");
// If we didn't find a touch in our list that matches this, then add it.
// If it already existed, we don't want to add it twice because that
// messes with our touch move/end code.
if (!foundAlreadyExistingTouch) {
mTouches.AppendElement(event.mTouches[i]);
}
}
size_t length = mTouches.Length();
if (length == 1) {
mTapStartTime = event.mTime;
mTouchStartPosition = event.mTouches[0].mScreenPoint;
if (mState == GESTURE_NONE) {
mState = GESTURE_WAITING_SINGLE_TAP;
mLongTapTimeoutTask =
NewRunnableMethod(this, &GestureEventListener::TimeoutLongTap);
MessageLoop::current()->PostDelayedTask(
FROM_HERE,
mLongTapTimeoutTask,
Preferences::GetInt("ui.click_hold_context_menus.delay", 500));
}
} else if (length == 2) {
// Another finger has been added; it can't be a tap anymore.
HandleTapCancel(event);
}
break;
}
case MultiTouchInput::MULTITOUCH_MOVE: {
// If we move too much, bail out of the tap.
nsIntPoint touch = (nsIntPoint&)event.mTouches[0].mScreenPoint;
if (mTouches.Length() == 1 &&
NS_hypot(mTouchStartPosition.x - touch.x, mTouchStartPosition.y - touch.y) >
mAsyncPanZoomController->GetDPI() * AsyncPanZoomController::TOUCH_START_TOLERANCE)
{
HandleTapCancel(event);
}
bool foundAlreadyExistingTouch = false;
for (size_t i = 0; i < mTouches.Length(); i++) {
for (size_t j = 0; j < event.mTouches.Length(); j++) {
if (mTouches[i].mIdentifier == event.mTouches[j].mIdentifier) {
foundAlreadyExistingTouch = true;
mTouches[i] = event.mTouches[j];
}
}
}
NS_WARN_IF_FALSE(foundAlreadyExistingTouch, "Touch moved, but not in list");
break;
}
case MultiTouchInput::MULTITOUCH_END:
case MultiTouchInput::MULTITOUCH_LEAVE: {
bool foundAlreadyExistingTouch = false;
for (size_t i = 0; i < event.mTouches.Length() && !foundAlreadyExistingTouch; i++) {
for (size_t j = 0; j < mTouches.Length() && !foundAlreadyExistingTouch; j++) {
if (event.mTouches[i].mIdentifier == mTouches[j].mIdentifier) {
foundAlreadyExistingTouch = true;
mTouches.RemoveElementAt(j);
}
}
}
NS_WARN_IF_FALSE(foundAlreadyExistingTouch, "Touch ended, but not in list");
if (event.mTime - mTapStartTime <= MAX_TAP_TIME) {
if (mState == GESTURE_WAITING_DOUBLE_TAP &&
event.mTime - mLastTapEndTime > MAX_TAP_TIME) {
// mDoubleTapTimeoutTask wasn't scheduled in time. We need to run the
// task synchronously to confirm the last tap.
mDoubleTapTimeoutTask->Cancel();
TimeoutDoubleTap();
// Change the state so we can proceed to process the current tap.
mState = GESTURE_WAITING_SINGLE_TAP;
}
if (mState == GESTURE_WAITING_DOUBLE_TAP) {
mDoubleTapTimeoutTask->Cancel();
// We were waiting for a double tap and it has arrived.
HandleDoubleTap(event);
mState = GESTURE_NONE;
} else if (mState == GESTURE_WAITING_SINGLE_TAP) {
mLongTapTimeoutTask->Cancel();
HandleSingleTapUpEvent(event);
// We were not waiting for anything but a single tap has happened that
// may turn into a double tap. Wait a while and if it doesn't turn into
// a double tap, send a single tap instead.
mState = GESTURE_WAITING_DOUBLE_TAP;
mDoubleTapTimeoutTask =
NewRunnableMethod(this, &GestureEventListener::TimeoutDoubleTap);
MessageLoop::current()->PostDelayedTask(
FROM_HERE,
mDoubleTapTimeoutTask,
MAX_TAP_TIME);
}
mLastTapEndTime = event.mTime;
}
if (mState == GESTURE_WAITING_SINGLE_TAP) {
mState = GESTURE_NONE;
}
if (!mTouches.Length()) {
mSpanChange = 0.0f;
}
break;
}
case MultiTouchInput::MULTITOUCH_CANCEL:
// This gets called if there's a touch that has to bail for weird reasons
// like pinching and then moving away from the window that the pinch was
// started in without letting go of the screen.
HandlePinchGestureEvent(event, true);
break;
}
return HandlePinchGestureEvent(event, false);
}
