/*****************************************************/
/*          This java file is a part of the          */
/*                                                   */
/*           -  Plouf's Java IRC Client  -           */
/*                                                   */
/*   Copyright (C)  2002 - 2004 Philippe Detournay   */
/*                                                   */
/*         All contacts : theplouf@yahoo.com         */
/*                                                   */
/*  PJIRC is free software; you can redistribute     */
/*  it and/or modify it under the terms of the GNU   */
/*  General Public License as published by the       */
/*  Free Software Foundation; version 2 or later of  */
/*  the License.                                     */
/*                                                   */
/*  PJIRC 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   */
/*  General Public License for more details.         */
/*                                                   */
/*  You should have received a copy of the GNU       */
/*  General Public License along with PJIRC; if      */
/*  not, write to the Free Software Foundation,      */
/*  Inc., 59 Temple Place, Suite 330, Boston,        */
/*  MA  02111-1307  USA                              */
/*                                                   */
/*****************************************************/

package irc.style;

/**
 * A rectangle.
 */
public class StyledRectangle {
	/**
	 * X position.
	 */
	public int x;

	/**
	 * Y position.
	 */
	public int y;

	/**
	 * Width.
	 */
	public int width;

	/**
	 * Height.
	 */
	public int height;

	/**
	 * Create a new StyledRectangle.
	 * 
	 * @param ax
	 *          x position.
	 * @param ay
	 *          y position.
	 * @param w
	 *          width.
	 * @param h
	 *          height.
	 */
	public StyledRectangle(int ax, int ay, int w, int h) {
		x = ax;
		y = ay;
		width = w;
		height = h;
	}

	@Override
	public boolean equals(Object o) {
		if (!(o instanceof StyledRectangle))
			return false;
		StyledRectangle r = (StyledRectangle) o;
		return (r.x == x) && (r.y == y) && (r.width == width) && (r.height == height);
	}

	@Override
	public int hashCode() {
		return x + y + width + height;
	}

	/**
	 * Test wether the given point is inside the rectangle or not.
	 * 
	 * @param px
	 *          x coordinate of point to test.
	 * @param py
	 *          y coordinate of point to test.
	 * @return true if the point is inside the rectangle, false otherwise.
	 */
	public boolean contains(int px, int py) {
		return (px >= x) && (py >= y) && (px < x + width) && (py < y + height);
	}

	private boolean noEmpty(int v1, int lv1, int v2, int lv2) {
		if (v1 < v2)
			return v1 + lv1 > v2;
		return v2 + lv2 > v1;
	}

	/**
	 * Test wether the given rectangle is partially or fully inside the rectangle
	 * or not.
	 * 
	 * @param r
	 *          rectangle to test.
	 * @return true if r is partially or fully inside the rectangle, false
	 *         otherwise.
	 */
	public boolean hit(StyledRectangle r) {
		if (!noEmpty(r.x, r.width, x, width))
			return false;
		return noEmpty(r.y, r.height, y, height);
	}

	/**
	 * Add the given rectangle to this rectangle. This rectangle will be the union
	 * of the two rectangles.
	 * 
	 * @param r
	 *          the rectangle to add.
	 */
	public void add(StyledRectangle r) {
		if (r.x < x) {
			width += (x - r.x);
			x = r.x;
		}

		if (r.y < y) {
			height += (y - r.y);
			y = r.y;
		}

		if (r.width > width)
			width = r.width;
		if (r.height > height)
			height = r.height;
	}

	@Override
	public String toString() {
		return "StyledRectangle : " + x + "," + y + "," + width + "," + height;
	}
}