Label.java

/*
 * Copyright 2013 Hannes Janetzek
 *
 * This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
 *
 * This program is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.oscim.layers.tile.vector.labeling;

import org.oscim.renderer.bucket.TextItem;
import org.oscim.utils.geom.OBB2D;

final class Label extends TextItem {
	TextItem item;

	//Link blocking;
	//Link blockedBy;
	// shared list of all label for a tile
	//Link siblings;

	int tileX;
	int tileY;
	int tileZ;

	public int active;
	public OBB2D bbox;

	public Label clone(TextItem ti) {
		this.string = ti.string;
		this.text = ti.text;
		this.width = ti.width;
		this.length = ti.length;
		return this;
	}

	static int comparePriority(Label l1, Label l2) {

		return 0;
	}

	public static boolean shareText(Label l, Label ll) {
		if (l.text != ll.text)
			return false;

		if (l.string == ll.string)
			return true;

		if (l.string.equals(ll.string)) {
			// make strings unique, should be done only once..
			l.string = ll.string;
			return true;
		}

		return false;
	}

	public static boolean bboxOverlaps(TextItem it1, TextItem it2, float add) {
		if (it1.y1 < it1.y2) {
			if (it2.y1 < it2.y2)
				return (it1.x1 - add < it2.x2)
				        && (it2.x1 < it1.x2 + add)
				        && (it1.y1 - add < it2.y2)
				        && (it2.y1 < it1.y2 + add);

			// flip it2
			return (it1.x1 - add < it2.x2)
			        && (it2.x1 < it1.x2 + add)
			        && (it1.y1 - add < it2.y1)
			        && (it2.y2 < it1.y2 + add);
		}

		// flip it1
		if (it2.y1 < it2.y2)
			return (it1.x1 - add < it2.x2)
			        && (it2.x1 < it1.x2 + add)
			        && (it1.y2 - add < it2.y2)
			        && (it2.y1 < it1.y1 + add);

		// flip both
		return (it1.x1 - add < it2.x2)
		        && (it2.x1 < it1.x2 + add)
		        && (it1.y2 - add < it2.y1)
		        && (it2.y2 < it1.y1 + add);
	}

	public void setAxisAlignedBBox() {
		this.x1 = (int) (x - width / 2);
		this.y1 = (int) (y - text.fontHeight / 2);
		this.x2 = (int) (x + width / 2);
		this.y2 = (int) (y + text.fontHeight / 2);
	}
}