Class Animatable

src/main/java/fielded/Animatable.java:17–95

What does it mean to Animate a box? This class handles conversions from various dynamic language constructs to things with a beginning, a middle and an end. Runtimes can register things that can be converted into this format here with this registry. Question: should this just use the Conversions

 * and an end. Runtimes can register things that can be converted into this format here with this registry.
 * <p>
 * Question: should this just use the Conversions.java framework instead?
 */
public class Animatable {


	public interface AnimationElement {

		default Object beginning(boolean isEnding) {
			return this;
		}

		default Object middle(boolean isEnding) {
			return this;
		}

		default Object end(boolean isEnding) {
			return this;
		}
	}

	static public class Shim implements Supplier<Boolean>, Consumer<Boolean> {
		protected final AnimationElement e;
		protected boolean stopping = false;
		protected boolean first = true;

		public Shim(AnimationElement e) {
			this.e = e;
		}

		@Override
		public Boolean get() {
			try {
				if (first) {
					first = false;
					e.beginning(stopping);
					return true;
				} else if (stopping) {
					e.end(stopping);
					return false;
				} else {
					e.middle(stopping);
					return true;
				}
			} catch (Throwable t) {
				t.printStackTrace();
				Errors.INSTANCE.tryToReportTo(t, "Error thrown in box animation, box stopped", null);

				return false;
			}
		}

		@Override
		public void accept(Boolean willContinue) {
			stopping = !willContinue;
		}

	}