bool
APZEventState::SendPendingTouchPreventedResponse(bool aPreventDefault)
{
if (mPendingTouchPreventedResponse) {
APZES_LOG("Sending response %d for pending guid: %s\n", aPreventDefault,
Stringify(mPendingTouchPreventedGuid).c_str());
mContentReceivedInputBlockCallback(mPendingTouchPreventedGuid,
mPendingTouchPreventedBlockId, aPreventDefault);
mPendingTouchPreventedResponse = false;
return true;
}
return false;
}
void
APZEventState::ProcessLongTap(const nsCOMPtr<nsIPresShell>& aPresShell,
const CSSPoint& aPoint,
const CSSToLayoutDeviceScale& aScale,
Modifiers aModifiers,
const ScrollableLayerGuid& aGuid,
uint64_t aInputBlockId)
{
APZES_LOG("Handling long tap at %s\n", Stringify(aPoint).c_str());
nsCOMPtr<nsIWidget> widget = GetWidget();
if (!widget) {
return;
}
SendPendingTouchPreventedResponse(false);
#ifdef XP_WIN
// On Windows, we fire the contextmenu events when the user lifts their
// finger, in keeping with the platform convention. This happens in the
// ProcessLongTapUp function. However, we still fire the eMouseLongTap event
// at this time, because things like text selection or dragging may want
// to know about it.
nsEventStatus status = APZCCallbackHelper::DispatchSynthesizedMouseEvent(
eMouseLongTap, /*time*/ 0, aPoint * aScale, aModifiers, /*clickCount*/ 1,
widget);
bool eventHandled = (status == nsEventStatus_eConsumeNoDefault);
#else
bool eventHandled = FireContextmenuEvents(aPresShell, aPoint, aScale,
aModifiers, widget);
#endif
mContentReceivedInputBlockCallback(aGuid, aInputBlockId, eventHandled);
if (eventHandled) {
// Also send a touchcancel to content, so that listeners that might be
// waiting for a touchend don't trigger.
WidgetTouchEvent cancelTouchEvent(true, eTouchCancel, widget.get());
cancelTouchEvent.mModifiers = aModifiers;
auto ldPoint = LayoutDeviceIntPoint::Round(aPoint * aScale);
cancelTouchEvent.mTouches.AppendElement(new mozilla::dom::Touch(mLastTouchIdentifier,
ldPoint, LayoutDeviceIntPoint(), 0, 0));
APZCCallbackHelper::DispatchWidgetEvent(cancelTouchEvent);
}
}
void
APZEventState::ProcessTouchEvent(const WidgetTouchEvent& aEvent,
const ScrollableLayerGuid& aGuid,
uint64_t aInputBlockId,
nsEventStatus aApzResponse,
nsEventStatus aContentResponse)
{
if (aEvent.mMessage == eTouchStart && aEvent.mTouches.Length() > 0) {
mActiveElementManager->SetTargetElement(aEvent.mTouches[0]->GetTarget());
mLastTouchIdentifier = aEvent.mTouches[0]->Identifier();
}
bool isTouchPrevented = aContentResponse == nsEventStatus_eConsumeNoDefault;
bool sentContentResponse = false;
APZES_LOG("Handling event type %d\n", aEvent.mMessage);
switch (aEvent.mMessage) {
case eTouchStart: {
mTouchEndCancelled = false;
sentContentResponse = SendPendingTouchPreventedResponse(false);
// sentContentResponse can be true here if we get two TOUCH_STARTs in a row
// and just responded to the first one.
// We're about to send a response back to APZ, but we should only do it
// for events that went through APZ (which should be all of them).
MOZ_ASSERT(aEvent.mFlags.mHandledByAPZ);
if (isTouchPrevented) {
mContentReceivedInputBlockCallback(aGuid, aInputBlockId, isTouchPrevented);
sentContentResponse = true;
} else {
APZES_LOG("Event not prevented; pending response for %" PRIu64 " %s\n",
aInputBlockId, Stringify(aGuid).c_str());
mPendingTouchPreventedResponse = true;
mPendingTouchPreventedGuid = aGuid;
mPendingTouchPreventedBlockId = aInputBlockId;
}
break;
}
case eTouchEnd:
if (isTouchPrevented) {
mTouchEndCancelled = true;
mEndTouchIsClick = false;
}
MOZ_FALLTHROUGH;
case eTouchCancel:
mActiveElementManager->HandleTouchEndEvent(mEndTouchIsClick);
MOZ_FALLTHROUGH;
case eTouchMove: {
if (mPendingTouchPreventedResponse) {
MOZ_ASSERT(aGuid == mPendingTouchPreventedGuid);
}
sentContentResponse = SendPendingTouchPreventedResponse(isTouchPrevented);
break;
}
default:
NS_WARNING("Unknown touch event type");
}
if (sentContentResponse &&
aApzResponse == nsEventStatus_eConsumeDoDefault &&
gfxPrefs::PointerEventsEnabled()) {
WidgetTouchEvent cancelEvent(aEvent);
cancelEvent.mMessage = eTouchCancel;
cancelEvent.mFlags.mCancelable = false; // mMessage != eTouchCancel;
for (uint32_t i = 0; i < cancelEvent.mTouches.Length(); ++i) {
if (mozilla::dom::Touch* touch = cancelEvent.mTouches[i]) {
touch->convertToPointer = true;
}
}
nsEventStatus status;
cancelEvent.mWidget->DispatchEvent(&cancelEvent, status);
}
}
void
APZEventState::ProcessTouchEvent(const WidgetTouchEvent& aEvent,
const ScrollableLayerGuid& aGuid,
uint64_t aInputBlockId,
nsEventStatus aApzResponse,
nsEventStatus aContentResponse)
{
if (aEvent.mMessage == eTouchStart && aEvent.mTouches.Length() > 0) {
mActiveElementManager->SetTargetElement(aEvent.mTouches[0]->GetTarget());
}
bool isTouchPrevented = aContentResponse == nsEventStatus_eConsumeNoDefault;
bool sentContentResponse = false;
APZES_LOG("Handling event type %d\n", aEvent.mMessage);
switch (aEvent.mMessage) {
case eTouchStart: {
mTouchEndCancelled = false;
sentContentResponse = SendPendingTouchPreventedResponse(false);
// sentContentResponse can be true here if we get two TOUCH_STARTs in a row
// and just responded to the first one.
if (!aEvent.mFlags.mHandledByAPZ) {
// This condition being true means this touchstart is synthetic and is
// coming from TabParent.injectTouchEvent.
// Since APZ doesn't know about it we don't want to send a response for
// this block; we want to just skip over it from the point of view of
// prevent-default notifications.
APZES_LOG("Got a synthetic touch-start!\n");
break;
}
if (isTouchPrevented) {
mContentReceivedInputBlockCallback(aGuid, aInputBlockId, isTouchPrevented);
sentContentResponse = true;
} else {
APZES_LOG("Event not prevented; pending response for %" PRIu64 " %s\n",
aInputBlockId, Stringify(aGuid).c_str());
mPendingTouchPreventedResponse = true;
mPendingTouchPreventedGuid = aGuid;
mPendingTouchPreventedBlockId = aInputBlockId;
}
break;
}
case eTouchEnd:
if (isTouchPrevented) {
mTouchEndCancelled = true;
mEndTouchIsClick = false;
}
MOZ_FALLTHROUGH;
case eTouchCancel:
mActiveElementManager->HandleTouchEndEvent(mEndTouchIsClick);
MOZ_FALLTHROUGH;
case eTouchMove: {
if (mPendingTouchPreventedResponse) {
MOZ_ASSERT(aGuid == mPendingTouchPreventedGuid);
}
sentContentResponse = SendPendingTouchPreventedResponse(isTouchPrevented);
break;
}
default:
NS_WARNING("Unknown touch event type");
}
if (sentContentResponse &&
aApzResponse == nsEventStatus_eConsumeDoDefault &&
gfxPrefs::PointerEventsEnabled()) {
WidgetTouchEvent cancelEvent(aEvent);
cancelEvent.mMessage = eTouchCancel;
cancelEvent.mFlags.mCancelable = false; // mMessage != eTouchCancel;
for (uint32_t i = 0; i < cancelEvent.mTouches.Length(); ++i) {
if (mozilla::dom::Touch* touch = cancelEvent.mTouches[i]) {
touch->convertToPointer = true;
}
}
nsEventStatus status;
cancelEvent.widget->DispatchEvent(&cancelEvent, status);
}
}