1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/mobile/android/base/gfx/PointUtils.java Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,51 @@
1.4 +/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +package org.mozilla.gecko.gfx;
1.10 +
1.11 +import org.json.JSONException;
1.12 +import org.json.JSONObject;
1.13 +
1.14 +import android.graphics.Point;
1.15 +import android.graphics.PointF;
1.16 +
1.17 +public final class PointUtils {
1.18 + public static PointF add(PointF one, PointF two) {
1.19 + return new PointF(one.x + two.x, one.y + two.y);
1.20 + }
1.21 +
1.22 + public static PointF subtract(PointF one, PointF two) {
1.23 + return new PointF(one.x - two.x, one.y - two.y);
1.24 + }
1.25 +
1.26 + public static PointF scale(PointF point, float factor) {
1.27 + return new PointF(point.x * factor, point.y * factor);
1.28 + }
1.29 +
1.30 + public static Point round(PointF point) {
1.31 + return new Point(Math.round(point.x), Math.round(point.y));
1.32 + }
1.33 +
1.34 + /* Computes the magnitude of the given vector. */
1.35 + public static float distance(PointF point) {
1.36 + return (float)Math.sqrt(point.x * point.x + point.y * point.y);
1.37 + }
1.38 +
1.39 + /** Computes the scalar distance between two points. */
1.40 + public static float distance(PointF one, PointF two) {
1.41 + return PointF.length(one.x - two.x, one.y - two.y);
1.42 + }
1.43 +
1.44 + public static JSONObject toJSON(PointF point) throws JSONException {
1.45 + // Ensure we put ints, not longs, because Gecko message handlers call getInt().
1.46 + int x = Math.round(point.x);
1.47 + int y = Math.round(point.y);
1.48 + JSONObject json = new JSONObject();
1.49 + json.put("x", x);
1.50 + json.put("y", y);
1.51 + return json;
1.52 + }
1.53 +}
1.54 +
