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