/**
* Updates the overlay-color rounding of the parent's child drawable.
*
* <ul>
* <li>If rounding mode is OVERLAY_COLOR and the child is not a RoundedCornersDrawable, a new
* RoundedCornersDrawable is created and the child gets wrapped with it.
* <li>If rounding mode is OVERLAY_COLOR and the child is already wrapped with a
* RoundedCornersDrawable, its rounding parameters are updated.
* <li>If rounding mode is not OVERLAY_COLOR and the child is wrapped with a
* RoundedCornersDrawable, the rounded drawable gets removed and its child gets attached
* directly to the parent.
* </ul>
*/
static void updateOverlayColorRounding(
DrawableParent parent, @Nullable RoundingParams roundingParams) {
Drawable child = parent.getDrawable();
if (roundingParams != null
&& roundingParams.getRoundingMethod() == RoundingParams.RoundingMethod.OVERLAY_COLOR) {
// Overlay rounding requested - either update the overlay params or add a new
// drawable that will do the requested rounding.
if (child instanceof RoundedCornersDrawable) {
RoundedCornersDrawable roundedCornersDrawable = (RoundedCornersDrawable) child;
applyRoundingParams(roundedCornersDrawable, roundingParams);
roundedCornersDrawable.setOverlayColor(roundingParams.getOverlayColor());
} else {
// Important: remove the child before wrapping it with a new parent!
child = parent.setDrawable(sEmptyDrawable);
child = maybeWrapWithRoundedOverlayColor(child, roundingParams);
parent.setDrawable(child);
}
} else if (child instanceof RoundedCornersDrawable) {
// Overlay rounding no longer required so remove drawable that was doing the rounding.
RoundedCornersDrawable roundedCornersDrawable = (RoundedCornersDrawable) child;
// Important: remove the child before wrapping it with a new parent!
child = roundedCornersDrawable.setCurrent(sEmptyDrawable);
parent.setDrawable(child);
// roundedCornersDrawable is removed and will get garbage collected, clear the child callback
sEmptyDrawable.setCallback(null);
}
}
/**
* Wraps the given drawable with a new {@link RoundedCornersDrawable}.
*
* <p>If the provided drawable is null, or if the rounding params do not specify OVERLAY_COLOR
* mode, the given drawable is returned without being wrapped.
*
* @return the wrapping rounded drawable, or the original drawable if the wrapping didn't take
* place
*/
static Drawable maybeWrapWithRoundedOverlayColor(
@Nullable Drawable drawable, @Nullable RoundingParams roundingParams) {
if (drawable == null
|| roundingParams == null
|| roundingParams.getRoundingMethod() != RoundingParams.RoundingMethod.OVERLAY_COLOR) {
return drawable;
}
RoundedCornersDrawable roundedCornersDrawable = new RoundedCornersDrawable(drawable);
applyRoundingParams(roundedCornersDrawable, roundingParams);
roundedCornersDrawable.setOverlayColor(roundingParams.getOverlayColor());
return roundedCornersDrawable;
}