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/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Android code.
*
* The Initial Developer of the Original Code is Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Kartikaya Gupta <kgupta@mozilla.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
package org.mozilla.gecko.gfx;
import org.mozilla.gecko.util.FloatUtils;
import android.graphics.Point;
import android.graphics.PointF;
import android.graphics.Rect;
import android.graphics.RectF;
import org.json.JSONException;
import org.json.JSONObject;
public final class RectUtils {
public static Rect create(JSONObject json) {
try {
int x = json.getInt("x");
int y = json.getInt("y");
int width = json.getInt("width");
int height = json.getInt("height");
return new Rect(x, y, x + width, y + height);
} catch (JSONException e) {
throw new RuntimeException(e);
}
}
public static Rect contract(Rect rect, int lessWidth, int lessHeight) {
float halfLessWidth = lessWidth / 2.0f;
float halfLessHeight = lessHeight / 2.0f;
return new Rect(Math.round(rect.left + halfLessWidth),
Math.round(rect.top + halfLessHeight),
Math.round(rect.right - halfLessWidth),
Math.round(rect.bottom - halfLessHeight));
}
public static RectF contract(RectF rect, float lessWidth, float lessHeight) {
float halfLessWidth = lessWidth / 2;
float halfLessHeight = lessHeight / 2;
return new RectF(rect.left + halfLessWidth,
rect.top + halfLessHeight,
rect.right - halfLessWidth,
rect.bottom - halfLessHeight);
}
public static RectF expand(RectF rect, float moreWidth, float moreHeight) {
float halfMoreWidth = moreWidth / 2;
float halfMoreHeight = moreHeight / 2;
return new RectF(rect.left - halfMoreWidth,
rect.top - halfMoreHeight,
rect.right + halfMoreWidth,
rect.bottom + halfMoreHeight);
}
public static RectF intersect(RectF one, RectF two) {
float left = Math.max(one.left, two.left);
float top = Math.max(one.top, two.top);
float right = Math.min(one.right, two.right);
float bottom = Math.min(one.bottom, two.bottom);
return new RectF(left, top, Math.max(right, left), Math.max(bottom, top));
}
public static RectF scale(RectF rect, float scale) {
float x = rect.left * scale;
float y = rect.top * scale;
return new RectF(x, y,
x + (rect.width() * scale),
y + (rect.height() * scale));
}
/** Returns the nearest integer rect of the given rect. */
public static Rect round(RectF rect) {
return new Rect(Math.round(rect.left), Math.round(rect.top),
Math.round(rect.right), Math.round(rect.bottom));
}
public static IntSize getSize(Rect rect) {
return new IntSize(rect.width(), rect.height());
}
public static Point getOrigin(Rect rect) {
return new Point(rect.left, rect.top);
}
public static PointF getOrigin(RectF rect) {
return new PointF(rect.left, rect.top);
}
/*
* Returns the rect that represents a linear transition between `from` and `to` at time `t`,
* which is on the scale [0, 1).
*/
public static RectF interpolate(RectF from, RectF to, float t) {
return new RectF(FloatUtils.interpolate(from.left, to.left, t),
FloatUtils.interpolate(from.top, to.top, t),
FloatUtils.interpolate(from.right, to.right, t),
FloatUtils.interpolate(from.bottom, to.bottom, t));
}
public static boolean fuzzyEquals(RectF a, RectF b) {
return FloatUtils.fuzzyEquals(a.top, b.top)
&& FloatUtils.fuzzyEquals(a.left, b.left)
&& FloatUtils.fuzzyEquals(a.right, b.right)
&& FloatUtils.fuzzyEquals(a.bottom, b.bottom);
}
}
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