/**
* Calculates the animation duration given the |initialVelocity| and a desired |displacement|.
*
* @param initialVelocity The initial velocity of the animation in dps per second.
* @param displacement The displacement of the animation in dps.
* @return The animation duration in milliseconds.
*/
private long calculateAnimationDuration(float initialVelocity, float displacement) {
// NOTE(pedrosimonetti): This formula assumes the deceleration curve is
// quadratic (t^2),
// hence the duration formula should be:
// duration = 2 * displacement / initialVelocity
//
// We are also converting the duration from seconds to milliseconds,
// which explains why
// we are multiplying by 2000 (2 * 1000) instead of 2.
return MathUtils.clamp(
Math.round(Math.abs(2000 * displacement / initialVelocity)),
MINIMUM_ANIMATION_DURATION_MS,
MAXIMUM_ANIMATION_DURATION_MS);
}
/**
* A comparison function for sorting by storage (most used first).
*
* @return which site uses more storage.
*/
public int compareByStorageTo(Website to) {
if (this == to) return 0;
return MathUtils.compareLongs(to.getTotalUsage(), getTotalUsage());
}
/**
* Generate color based on bookmarked url's hash code. Same color will always be returned given
* same bookmark item.
*
* @param item bookmark the color represents for
* @return int for the generated color
*/
public static int generateBackgroundColor(BookmarkItem item) {
int normalizedIndex =
MathUtils.positiveModulo(item.getUrl().hashCode(), DEFAULT_BACKGROUND_COLORS.length);
return DEFAULT_BACKGROUND_COLORS[normalizedIndex];
}
@Override
public float getTopControlsOffset(float currentOffsetDp) {
return MathUtils.clamp(
mBaseTab.getY(), -mSearchPanel.getToolbarHeight(), Math.min(currentOffsetDp, 0f));
}
