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/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/org/documents/epl-v10.php
*
* 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 com.android.ide.common.api;
import com.google.common.annotations.Beta;
import com.android.annotations.NonNull;
import com.android.annotations.Nullable;
/**
* Mutable rectangle bounds.
* <p/>
* To be valid, w >= 1 and h >= 1.
* By definition:
* - right side = x + w - 1.
* - bottom side = y + h - 1.
* <p>
* <b>NOTE: This is not a public or final API; if you rely on this be prepared
* to adjust your code for the next tools release.</b>
* </p>
*/
@Beta
public class Rect {
public int x, y, w, h;
/** Initialize an invalid rectangle. */
public Rect() {
}
/** Initialize rectangle to the given values. They can be invalid. */
public Rect(int x, int y, int w, int h) {
set(x, y, w, h);
}
/** Initialize rectangle to the given values. They can be invalid. */
public Rect(@NonNull Rect r) {
set(r);
}
/** Initialize rectangle to the given values. They can be invalid. */
@NonNull
public Rect set(int x, int y, int w, int h) {
this.x = x;
this.y = y;
this.w = w;
this.h = h;
return this;
}
/** Initialize rectangle to match the given one. */
@NonNull
public Rect set(@NonNull Rect r) {
set(r.x, r.y, r.w, r.h);
return this;
}
/** Returns a new instance of a rectangle with the same values. */
@NonNull
public Rect copy() {
return new Rect(x, y, w, h);
}
/** Returns true if the rectangle has valid bounds, i.e. w>0 and h>0. */
public boolean isValid() {
return w > 0 && h > 0;
}
/** Returns true if the rectangle contains the x,y coordinates, borders included. */
public boolean contains(int x, int y) {
return isValid() &&
x >= this.x &&
y >= this.y &&
x < (this.x + this.w) &&
y < (this.y + this.h);
}
/** Returns true if the rectangle contains the x,y coordinates, borders included. */
public boolean contains(@Nullable Point p) {
return p != null && contains(p.x, p.y);
}
/**
* Moves this rectangle by setting it's x,y coordinates to the new values.
* @return Returns self, for chaining.
*/
@NonNull
public Rect moveTo(int x, int y) {
this.x = x;
this.y = y;
return this;
}
/**
* Offsets this rectangle by adding the given x,y deltas to the x,y coordinates.
* @return Returns self, for chaining.
*/
@NonNull
public Rect offsetBy(int x, int y) {
this.x += x;
this.y += y;
return this;
}
@NonNull
public Point getCenter() {
return new Point(x + (w > 0 ? w / 2 : 0),
y + (h > 0 ? h / 2 : 0));
}
@NonNull
public Point getTopLeft() {
return new Point(x, y);
}
@NonNull
public Point getBottomLeft() {
return new Point(x,
y + (h > 0 ? h : 0));
}
@NonNull
public Point getTopRight() {
return new Point(x + (w > 0 ? w : 0),
y);
}
@NonNull
public Point getBottomRight() {
return new Point(x + (w > 0 ? w : 0),
y + (h > 0 ? h : 0));
}
/**
* Returns the X coordinate of the right hand side of the rectangle
*
* @return the X coordinate of the right hand side of the rectangle
*/
public int x2() {
return x + w;
}
/**
* Returns the Y coordinate of the bottom of the rectangle
*
* @return the Y coordinate of the bottom of the rectangle
*/
public int y2() {
return y + h;
}
/**
* Returns the X coordinate of the center of the rectangle
*
* @return the X coordinate of the center of the rectangle
*/
public int centerX() {
return x + w / 2;
}
/**
* Returns the Y coordinate of the center of the rectangle
*
* @return the Y coordinate of the center of the rectangle
*/
public int centerY() {
return y + h / 2;
}
@Override
public String toString() {
return String.format("Rect [(%d,%d)-(%d,%d): %dx%d]", x, y, x + w, y + h, w, h);
}
@Override
public boolean equals(Object obj) {
if (obj instanceof Rect) {
Rect rhs = (Rect) obj;
// validity must be equal on both sides.
if (isValid() != rhs.isValid()) {
return false;
}
// an invalid rect is equal to any other invalid rect regardless of coordinates
if (!isValid() && !rhs.isValid()) {
return true;
}
return this.x == rhs.x && this.y == rhs.y && this.w == rhs.w && this.h == rhs.h;
}
return false;
}
@Override
public int hashCode() {
int hc = x;
hc ^= ((y >> 8) & 0x0FFFFFF) | ((y & 0x00000FF) << 24);
hc ^= ((w >> 16) & 0x000FFFF) | ((w & 0x000FFFF) << 16);
hc ^= ((h >> 24) & 0x00000FF) | ((h & 0x0FFFFFF) << 8);
return hc;
}
/**
* Returns the center point in the rectangle
*
* @return the center point in the rectangle
*/
@NonNull
public Point center() {
return new Point(x + w / 2, y + h / 2);
}
}
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