Example #1
0
bool
InputQueue::MaybeHandleCurrentBlock(CancelableBlockState *block,
                                    const InputData& aEvent) {
  if (block == CurrentBlock() && block->IsReadyForHandling()) {
    const RefPtr<AsyncPanZoomController>& target = block->GetTargetApzc();
    INPQ_LOG("current block is ready with target %p preventdefault %d\n",
        target.get(), block->IsDefaultPrevented());
    if (!target || block->IsDefaultPrevented()) {
      return true;
    }
    UpdateActiveApzc(block->GetTargetApzc());
    block->DispatchImmediate(aEvent);
    return true;
  }
  return false;
}
Example #2
0
void
InputQueue::ProcessQueue() {
  APZThreadUtils::AssertOnControllerThread();

  while (!mQueuedInputs.IsEmpty()) {
    CancelableBlockState* curBlock = mQueuedInputs[0]->Block();
    if (!curBlock->IsReadyForHandling()) {
      break;
    }

    INPQ_LOG("processing input from block %p; preventDefault %d target %p\n",
        curBlock, curBlock->IsDefaultPrevented(),
        curBlock->GetTargetApzc().get());
    RefPtr<AsyncPanZoomController> target = curBlock->GetTargetApzc();
    // target may be null here if the initial target was unconfirmed and then
    // we later got a confirmed null target. in that case drop the events.
    if (target) {
      if (curBlock->IsDefaultPrevented()) {
        if (curBlock->AsTouchBlock()) {
          target->ResetTouchInputState();
        }
      } else {
        UpdateActiveApzc(target);
        curBlock->DispatchEvent(*(mQueuedInputs[0]->Input()));
      }
    }
    mQueuedInputs.RemoveElementAt(0);
  }

  if (CanDiscardBlock(mActiveTouchBlock)) {
    mActiveTouchBlock = nullptr;
  }
  if (CanDiscardBlock(mActiveWheelBlock)) {
    mActiveWheelBlock = nullptr;
  }
  if (CanDiscardBlock(mActiveDragBlock)) {
    mActiveDragBlock = nullptr;
  }
  if (CanDiscardBlock(mActivePanGestureBlock)) {
    mActivePanGestureBlock = nullptr;
  }
}
Example #3
0
void
InputQueue::ProcessInputBlocks() {
  APZThreadUtils::AssertOnControllerThread();

  do {
    CancelableBlockState* curBlock = CurrentBlock();
    if (!curBlock->IsReadyForHandling()) {
      break;
    }

    INPQ_LOG("processing input block %p; preventDefault %d target %p\n",
        curBlock, curBlock->IsDefaultPrevented(),
        curBlock->GetTargetApzc().get());
    RefPtr<AsyncPanZoomController> target = curBlock->GetTargetApzc();
    // target may be null here if the initial target was unconfirmed and then
    // we later got a confirmed null target. in that case drop the events.
    if (!target) {
      curBlock->DropEvents();
    } else if (curBlock->IsDefaultPrevented()) {
      curBlock->DropEvents();
      target->ResetInputState();
    } else {
      UpdateActiveApzc(curBlock->GetTargetApzc());
      curBlock->HandleEvents();
    }
    MOZ_ASSERT(!curBlock->HasEvents());

    if (mInputBlockQueue.Length() == 1 && curBlock->MustStayActive()) {
      // Some types of blocks (e.g. touch blocks) accumulate events until the
      // next input block is started. Therefore we cannot remove the block from
      // the queue until we have started another block. This block will be
      // removed by SweepDeletedBlocks() whenever a new block is added.
      break;
    }

    // If we get here, we know there are more touch blocks in the queue after
    // |curBlock|, so we can remove |curBlock| and try to process the next one.
    INPQ_LOG("discarding processed %s block %p\n", curBlock->Type(), curBlock);
    mInputBlockQueue.RemoveElementAt(0);
  } while (!mInputBlockQueue.IsEmpty());
}