private void updateClipping(
StackScrollState resultState,
StackScrollAlgorithmState algorithmState,
AmbientState ambientState) {
Log.d(TAG, "updateClipping: ");
boolean dismissAllInProgress = ambientState.isDismissAllInProgress();
float previousNotificationEnd = 0;
float previousNotificationStart = 0;
boolean previousNotificationIsSwiped = false;
int childCount = algorithmState.visibleChildren.size();
for (int i = 0; i < childCount; i++) {
ExpandableView child = algorithmState.visibleChildren.get(i);
StackViewState state = resultState.getViewStateForView(child);
float newYTranslation = state.yTranslation + state.height * (1f - state.scale) / 2f;
float newHeight = state.height * state.scale;
// apply clipping and shadow
float newNotificationEnd = newYTranslation + newHeight;
float clipHeight;
if (previousNotificationIsSwiped) {
// When the previous notification is swiped, we don't clip the content to the
// bottom of it.
clipHeight = newHeight;
} else {
clipHeight = newNotificationEnd - previousNotificationEnd;
clipHeight = Math.max(0.0f, clipHeight);
if (clipHeight != 0.0f) {
// In the unlocked shade we have to clip a little bit higher because of the rounded
// corners of the notifications, but only if we are not fully overlapped by
// the top card.
float clippingCorrection = state.dimmed ? 0 : mRoundedRectCornerRadius * state.scale;
clipHeight += clippingCorrection;
}
}
updateChildClippingAndBackground(
state, newHeight, clipHeight, newHeight - (previousNotificationStart - newYTranslation));
if (dismissAllInProgress) {
state.clipTopAmount = Math.max(child.getMinClipTopAmount(), state.clipTopAmount);
}
if (!child.isTransparent()) {
// Only update the previous values if we are not transparent,
// otherwise we would clip to a transparent view.
if ((dismissAllInProgress && canChildBeDismissed(child))) {
previousNotificationIsSwiped = true;
} else {
previousNotificationIsSwiped = ambientState.getDraggedViews().contains(child);
previousNotificationEnd = newNotificationEnd;
previousNotificationStart = newYTranslation + state.clipTopAmount * state.scale;
}
}
}
}
