spine-runtimes/spine-libgdx/src/com/esotericsoftware/spine/Skin.java

/*******************************************************************************
 * Copyright (c) 2013, Esoteric Software
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ******************************************************************************/

package com.esotericsoftware.spine;

import com.esotericsoftware.spine.attachments.Attachment;

import com.badlogic.gdx.utils.Array;
import com.badlogic.gdx.utils.ObjectMap;
import com.badlogic.gdx.utils.ObjectMap.Entry;

/** Stores attachments by slot index and attachment name. */
public class Skin {
	static private final Key lookup = new Key();

	final String name;
	final ObjectMap<Key, Attachment> attachments = new ObjectMap();

	public Skin (String name) {
		if (name == null) throw new IllegalArgumentException("name cannot be null.");
		this.name = name;
	}

	public void addAttachment (int slotIndex, String name, Attachment attachment) {
		if (attachment == null) throw new IllegalArgumentException("attachment cannot be null.");
		Key key = new Key();
		key.set(slotIndex, name);
		attachments.put(key, attachment);
	}

	/** @return May be null. */
	public Attachment getAttachment (int slotIndex, String name) {
		lookup.set(slotIndex, name);
		return attachments.get(lookup);
	}

	public void findNamesForSlot (int slotIndex, Array<String> names) {
		if (names == null) throw new IllegalArgumentException("names cannot be null.");
		for (Key key : attachments.keys())
			if (key.slotIndex == slotIndex) names.add(key.name);
	}

	public void findAttachmentsForSlot (int slotIndex, Array<Attachment> attachments) {
		if (attachments == null) throw new IllegalArgumentException("attachments cannot be null.");
		for (Entry<Key, Attachment> entry : this.attachments.entries())
			if (entry.key.slotIndex == slotIndex) attachments.add(entry.value);
	}

	public void clear () {
		attachments.clear();
	}

	public String getName () {
		return name;
	}

	public String toString () {
		return name;
	}

	/** Attach each attachment in this skin if the corresponding attachment in the old skin is currently attached. */
	void attachAll (Skeleton skeleton, Skin oldSkin) {
		for (Entry<Key, Attachment> entry : oldSkin.attachments.entries()) {
			int slotIndex = entry.key.slotIndex;
			Slot slot = skeleton.slots.get(slotIndex);
			if (slot.attachment == entry.value) {
				Attachment attachment = getAttachment(slotIndex, entry.key.name);
				if (attachment != null) slot.setAttachment(attachment);
			}
		}
	}

	static class Key {
		int slotIndex;
		String name;
		int hashCode;

		public void set (int slotName, String name) {
			if (name == null) throw new IllegalArgumentException("name cannot be null.");
			this.slotIndex = slotName;
			this.name = name;
			hashCode = 31 * (31 + name.hashCode()) + slotIndex;
		}

		public int hashCode () {
			return hashCode;
		}

		public boolean equals (Object object) {
			if (object == null) return false;
			Key other = (Key)object;
			if (slotIndex != other.slotIndex) return false;
			if (!name.equals(other.name)) return false;
			return true;
		}

		public String toString () {
			return slotIndex + ":" + name;
		}
	}
}