WheelBlockState*
InputQueue::GetActiveWheelTransaction() const
{
WheelBlockState* block = mActiveWheelBlock.get();
if (!block || !block->InTransaction()) {
return nullptr;
}
return block;
}
WheelBlockState*
InputQueue::GetCurrentWheelTransaction() const
{
if (mInputBlockQueue.IsEmpty()) {
return nullptr;
}
WheelBlockState* block = CurrentBlock()->AsWheelBlock();
if (!block || !block->InTransaction()) {
return nullptr;
}
return block;
}
nsEventStatus
InputQueue::ReceiveScrollWheelInput(const RefPtr<AsyncPanZoomController>& aTarget,
bool aTargetConfirmed,
const ScrollWheelInput& aEvent,
uint64_t* aOutInputBlockId) {
WheelBlockState* block = nullptr;
if (!mInputBlockQueue.IsEmpty()) {
block = mInputBlockQueue.LastElement()->AsWheelBlock();
// If the block is not accepting new events we'll create a new input block
// (and therefore a new wheel transaction).
if (block &&
(!block->ShouldAcceptNewEvent() ||
block->MaybeTimeout(aEvent)))
{
block = nullptr;
}
}
MOZ_ASSERT(!block || block->InTransaction());
if (!block) {
block = new WheelBlockState(aTarget, aTargetConfirmed, aEvent);
INPQ_LOG("started new scroll wheel block %p for target %p\n", block, aTarget.get());
SweepDepletedBlocks();
mInputBlockQueue.AppendElement(block);
CancelAnimationsForNewBlock(block);
MaybeRequestContentResponse(aTarget, block);
} else {
INPQ_LOG("received new event in block %p\n", block);
}
if (aOutInputBlockId) {
*aOutInputBlockId = block->GetBlockId();
}
block->Update(aEvent);
// Note that the |aTarget| the APZCTM sent us may contradict the confirmed
// target set on the block. In this case the confirmed target (which may be
// null) should take priority. This is equivalent to just always using the
// target (confirmed or not) from the block, which is what
// MaybeHandleCurrentBlock() does.
if (!MaybeHandleCurrentBlock(block, aEvent)) {
block->AddEvent(aEvent.AsScrollWheelInput());
}
return nsEventStatus_eConsumeDoDefault;
}
nsEventStatus
InputQueue::ReceiveScrollWheelInput(const RefPtr<AsyncPanZoomController>& aTarget,
bool aTargetConfirmed,
const ScrollWheelInput& aEvent,
uint64_t* aOutInputBlockId) {
WheelBlockState* block = mActiveWheelBlock.get();
// If the block is not accepting new events we'll create a new input block
// (and therefore a new wheel transaction).
if (block &&
(!block->ShouldAcceptNewEvent() ||
block->MaybeTimeout(aEvent)))
{
block = nullptr;
}
MOZ_ASSERT(!block || block->InTransaction());
if (!block) {
block = new WheelBlockState(aTarget, aTargetConfirmed, aEvent);
INPQ_LOG("started new scroll wheel block %p id %" PRIu64 " for target %p\n",
block, block->GetBlockId(), aTarget.get());
mActiveWheelBlock = block;
CancelAnimationsForNewBlock(block);
MaybeRequestContentResponse(aTarget, block);
} else {
INPQ_LOG("received new event in block %p\n", block);
}
if (aOutInputBlockId) {
*aOutInputBlockId = block->GetBlockId();
}
// Note that the |aTarget| the APZCTM sent us may contradict the confirmed
// target set on the block. In this case the confirmed target (which may be
// null) should take priority. This is equivalent to just always using the
// target (confirmed or not) from the block, which is what
// ProcessQueue() does.
mQueuedInputs.AppendElement(MakeUnique<QueuedInput>(aEvent, *block));
// The WheelBlockState needs to affix a counter to the event before we process
// it. Note that the counter is affixed to the copy in the queue rather than
// |aEvent|.
block->Update(mQueuedInputs.LastElement()->Input()->AsScrollWheelInput());
ProcessQueue();
return nsEventStatus_eConsumeDoDefault;
}