public void getStackScrollState(AmbientState ambientState, StackScrollState resultState) {
// The state of the local variables are saved in an algorithmState to easily subdivide it
// into multiple phases.
Log.d(TAG, "getStackScrollState: ");
StackScrollAlgorithmState algorithmState = mTempAlgorithmState;
// First we reset the view states to their default values.
resultState.resetViewStates();
algorithmState.itemsInTopStack = 0.0f;
algorithmState.partialInTop = 0.0f;
algorithmState.lastTopStackIndex = 0;
algorithmState.scrolledPixelsTop = 0;
algorithmState.itemsInBottomStack = 0.0f;
algorithmState.partialInBottom = 0.0f;
float bottomOverScroll = ambientState.getOverScrollAmount(false /* onTop */);
int scrollY = ambientState.getScrollY();
// Due to the overScroller, the stackscroller can have negative scroll state. This is
// already accounted for by the top padding and doesn't need an additional adaption
scrollY = Math.max(0, scrollY);
algorithmState.scrollY = (int) (scrollY + mCollapsedSize + bottomOverScroll);
updateVisibleChildren(resultState, algorithmState);
// Phase 1:
findNumberOfItemsInTopStackAndUpdateState(resultState, algorithmState, ambientState);
// Phase 2:
updatePositionsForState(resultState, algorithmState, ambientState);
// Phase 3:
updateZValuesForState(resultState, algorithmState);
handleDraggedViews(ambientState, resultState, algorithmState);
updateDimmedActivatedHideSensitive(ambientState, resultState, algorithmState);
updateClipping(resultState, algorithmState, ambientState);
updateSpeedBumpState(resultState, algorithmState, ambientState.getSpeedBumpIndex());
getNotificationChildrenStates(resultState, algorithmState);
}
