1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/mobile/android/base/gfx/RectUtils.java Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,126 @@
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.mozilla.gecko.util.FloatUtils;
1.12 +
1.13 +import org.json.JSONException;
1.14 +import org.json.JSONObject;
1.15 +
1.16 +import android.graphics.Point;
1.17 +import android.graphics.PointF;
1.18 +import android.graphics.Rect;
1.19 +import android.graphics.RectF;
1.20 +
1.21 +public final class RectUtils {
1.22 + private RectUtils() {}
1.23 +
1.24 + public static Rect create(JSONObject json) {
1.25 + try {
1.26 + int x = json.getInt("x");
1.27 + int y = json.getInt("y");
1.28 + int width = json.getInt("width");
1.29 + int height = json.getInt("height");
1.30 + return new Rect(x, y, x + width, y + height);
1.31 + } catch (JSONException e) {
1.32 + throw new RuntimeException(e);
1.33 + }
1.34 + }
1.35 +
1.36 + public static String toJSON(RectF rect) {
1.37 + StringBuilder sb = new StringBuilder(256);
1.38 + sb.append("{ \"left\": ").append(rect.left)
1.39 + .append(", \"top\": ").append(rect.top)
1.40 + .append(", \"right\": ").append(rect.right)
1.41 + .append(", \"bottom\": ").append(rect.bottom)
1.42 + .append('}');
1.43 + return sb.toString();
1.44 + }
1.45 +
1.46 + public static RectF expand(RectF rect, float moreWidth, float moreHeight) {
1.47 + float halfMoreWidth = moreWidth / 2;
1.48 + float halfMoreHeight = moreHeight / 2;
1.49 + return new RectF(rect.left - halfMoreWidth,
1.50 + rect.top - halfMoreHeight,
1.51 + rect.right + halfMoreWidth,
1.52 + rect.bottom + halfMoreHeight);
1.53 + }
1.54 +
1.55 + public static RectF contract(RectF rect, float lessWidth, float lessHeight) {
1.56 + float halfLessWidth = lessWidth / 2.0f;
1.57 + float halfLessHeight = lessHeight / 2.0f;
1.58 + return new RectF(rect.left + halfLessWidth,
1.59 + rect.top + halfLessHeight,
1.60 + rect.right - halfLessWidth,
1.61 + rect.bottom - halfLessHeight);
1.62 + }
1.63 +
1.64 + public static RectF intersect(RectF one, RectF two) {
1.65 + float left = Math.max(one.left, two.left);
1.66 + float top = Math.max(one.top, two.top);
1.67 + float right = Math.min(one.right, two.right);
1.68 + float bottom = Math.min(one.bottom, two.bottom);
1.69 + return new RectF(left, top, Math.max(right, left), Math.max(bottom, top));
1.70 + }
1.71 +
1.72 + public static RectF scale(RectF rect, float scale) {
1.73 + float x = rect.left * scale;
1.74 + float y = rect.top * scale;
1.75 + return new RectF(x, y,
1.76 + x + (rect.width() * scale),
1.77 + y + (rect.height() * scale));
1.78 + }
1.79 +
1.80 + public static RectF scaleAndRound(RectF rect, float scale) {
1.81 + float left = rect.left * scale;
1.82 + float top = rect.top * scale;
1.83 + return new RectF(Math.round(left),
1.84 + Math.round(top),
1.85 + Math.round(left + (rect.width() * scale)),
1.86 + Math.round(top + (rect.height() * scale)));
1.87 + }
1.88 +
1.89 + /** Returns the nearest integer rect of the given rect. */
1.90 + public static Rect round(RectF rect) {
1.91 + Rect r = new Rect();
1.92 + round(rect, r);
1.93 + return r;
1.94 + }
1.95 +
1.96 + public static void round(RectF rect, Rect dest) {
1.97 + dest.set(Math.round(rect.left), Math.round(rect.top),
1.98 + Math.round(rect.right), Math.round(rect.bottom));
1.99 + }
1.100 +
1.101 + public static Rect roundIn(RectF rect) {
1.102 + return new Rect((int)Math.ceil(rect.left), (int)Math.ceil(rect.top),
1.103 + (int)Math.floor(rect.right), (int)Math.floor(rect.bottom));
1.104 + }
1.105 +
1.106 + public static IntSize getSize(Rect rect) {
1.107 + return new IntSize(rect.width(), rect.height());
1.108 + }
1.109 +
1.110 + public static Point getOrigin(Rect rect) {
1.111 + return new Point(rect.left, rect.top);
1.112 + }
1.113 +
1.114 + public static PointF getOrigin(RectF rect) {
1.115 + return new PointF(rect.left, rect.top);
1.116 + }
1.117 +
1.118 + public static boolean fuzzyEquals(RectF a, RectF b) {
1.119 + if (a == null && b == null)
1.120 + return true;
1.121 + else if ((a == null && b != null) || (a != null && b == null))
1.122 + return false;
1.123 + else
1.124 + return FloatUtils.fuzzyEquals(a.top, b.top)
1.125 + && FloatUtils.fuzzyEquals(a.left, b.left)
1.126 + && FloatUtils.fuzzyEquals(a.right, b.right)
1.127 + && FloatUtils.fuzzyEquals(a.bottom, b.bottom);
1.128 + }
1.129 +}
