Look.java

/*
 * Copyright (c) 2010-2012 Célio Cidral Junior.
 *
 *     Licensed under the Apache License, Version 2.0 (the "License");
 *     you may not use this file except in compliance with the License.
 *     You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 *     Unless required by applicable law or agreed to in writing, software
 *     distributed under the License is distributed on an "AS IS" BASIS,
 *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *     See the License for the specific language governing permissions and
 *     limitations under the License.
 */

package org.tomighty.ui.theme;

import org.tomighty.bus.Bus;
import org.tomighty.bus.Subscriber;
import org.tomighty.bus.messages.ui.LookChanged;
import org.tomighty.bus.messages.ui.UiStateChanged;
import org.tomighty.config.Options;
import org.tomighty.ui.UiState;
import org.tomighty.ui.theme.colors.Gray;

import javax.inject.Inject;

public class Look implements Subscriber<UiStateChanged> {
	
	@Inject private Bus bus;
	@Inject private Options options;
	private Colors currentColors = defaultColors();

	@Inject
	public Look(Bus bus) {
		bus.subscribe(this, UiStateChanged.class);
	}

	public Theme theme() {
		return options.ui().theme();
	}
	
	public Colors colors() {
		return currentColors;
	}

	@Override
	public void receive(UiStateChanged message) {
		UiState uiState = message.uiState();
		Colors colors = uiState.colors();
		if(colors == null) {
			colors = defaultColors();
		}
		changeColors(colors);
	}

	private void changeColors(Colors colors) {
		if(currentColors.equals(colors)) {
			return;
		}
		currentColors = colors;
		bus.publish(new LookChanged());
	}

	private static Colors defaultColors() {
		return Gray.instance();
	}

}