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mobile/android/base/gfx/RectUtils.java@fc2d59ddac77 (annotated)

mobile/android/base/gfx/RectUtils.java

Wed, 31 Dec 2014 07:22:50 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 07:22:50 +0100

branch

TOR_BUG_3246

changeset 4

fc2d59ddac77

permissions

-rw-r--r--

Correct previous dual key logic pending first delivery installment.

michael@0	1	/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
michael@0	2	* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	3	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	4	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	5
michael@0	6	package org.mozilla.gecko.gfx;
michael@0	7
michael@0	8	import org.mozilla.gecko.util.FloatUtils;
michael@0	9
michael@0	10	import org.json.JSONException;
michael@0	11	import org.json.JSONObject;
michael@0	12
michael@0	13	import android.graphics.Point;
michael@0	14	import android.graphics.PointF;
michael@0	15	import android.graphics.Rect;
michael@0	16	import android.graphics.RectF;
michael@0	17
michael@0	18	public final class RectUtils {
michael@0	19	private RectUtils() {}
michael@0	20
michael@0	21	public static Rect create(JSONObject json) {
michael@0	22	try {
michael@0	23	int x = json.getInt("x");
michael@0	24	int y = json.getInt("y");
michael@0	25	int width = json.getInt("width");
michael@0	26	int height = json.getInt("height");
michael@0	27	return new Rect(x, y, x + width, y + height);
michael@0	28	} catch (JSONException e) {
michael@0	29	throw new RuntimeException(e);
michael@0	30	}
michael@0	31	}
michael@0	32
michael@0	33	public static String toJSON(RectF rect) {
michael@0	34	StringBuilder sb = new StringBuilder(256);
michael@0	35	sb.append("{ \"left\": ").append(rect.left)
michael@0	36	.append(", \"top\": ").append(rect.top)
michael@0	37	.append(", \"right\": ").append(rect.right)
michael@0	38	.append(", \"bottom\": ").append(rect.bottom)
michael@0	39	.append('}');
michael@0	40	return sb.toString();
michael@0	41	}
michael@0	42
michael@0	43	public static RectF expand(RectF rect, float moreWidth, float moreHeight) {
michael@0	44	float halfMoreWidth = moreWidth / 2;
michael@0	45	float halfMoreHeight = moreHeight / 2;
michael@0	46	return new RectF(rect.left - halfMoreWidth,
michael@0	47	rect.top - halfMoreHeight,
michael@0	48	rect.right + halfMoreWidth,
michael@0	49	rect.bottom + halfMoreHeight);
michael@0	50	}
michael@0	51
michael@0	52	public static RectF contract(RectF rect, float lessWidth, float lessHeight) {
michael@0	53	float halfLessWidth = lessWidth / 2.0f;
michael@0	54	float halfLessHeight = lessHeight / 2.0f;
michael@0	55	return new RectF(rect.left + halfLessWidth,
michael@0	56	rect.top + halfLessHeight,
michael@0	57	rect.right - halfLessWidth,
michael@0	58	rect.bottom - halfLessHeight);
michael@0	59	}
michael@0	60
michael@0	61	public static RectF intersect(RectF one, RectF two) {
michael@0	62	float left = Math.max(one.left, two.left);
michael@0	63	float top = Math.max(one.top, two.top);
michael@0	64	float right = Math.min(one.right, two.right);
michael@0	65	float bottom = Math.min(one.bottom, two.bottom);
michael@0	66	return new RectF(left, top, Math.max(right, left), Math.max(bottom, top));
michael@0	67	}
michael@0	68
michael@0	69	public static RectF scale(RectF rect, float scale) {
michael@0	70	float x = rect.left * scale;
michael@0	71	float y = rect.top * scale;
michael@0	72	return new RectF(x, y,
michael@0	73	x + (rect.width() * scale),
michael@0	74	y + (rect.height() * scale));
michael@0	75	}
michael@0	76
michael@0	77	public static RectF scaleAndRound(RectF rect, float scale) {
michael@0	78	float left = rect.left * scale;
michael@0	79	float top = rect.top * scale;
michael@0	80	return new RectF(Math.round(left),
michael@0	81	Math.round(top),
michael@0	82	Math.round(left + (rect.width() * scale)),
michael@0	83	Math.round(top + (rect.height() * scale)));
michael@0	84	}
michael@0	85
michael@0	86	/** Returns the nearest integer rect of the given rect. */
michael@0	87	public static Rect round(RectF rect) {
michael@0	88	Rect r = new Rect();
michael@0	89	round(rect, r);
michael@0	90	return r;
michael@0	91	}
michael@0	92
michael@0	93	public static void round(RectF rect, Rect dest) {
michael@0	94	dest.set(Math.round(rect.left), Math.round(rect.top),
michael@0	95	Math.round(rect.right), Math.round(rect.bottom));
michael@0	96	}
michael@0	97
michael@0	98	public static Rect roundIn(RectF rect) {
michael@0	99	return new Rect((int)Math.ceil(rect.left), (int)Math.ceil(rect.top),
michael@0	100	(int)Math.floor(rect.right), (int)Math.floor(rect.bottom));
michael@0	101	}
michael@0	102
michael@0	103	public static IntSize getSize(Rect rect) {
michael@0	104	return new IntSize(rect.width(), rect.height());
michael@0	105	}
michael@0	106
michael@0	107	public static Point getOrigin(Rect rect) {
michael@0	108	return new Point(rect.left, rect.top);
michael@0	109	}
michael@0	110
michael@0	111	public static PointF getOrigin(RectF rect) {
michael@0	112	return new PointF(rect.left, rect.top);
michael@0	113	}
michael@0	114
michael@0	115	public static boolean fuzzyEquals(RectF a, RectF b) {
michael@0	116	if (a == null && b == null)
michael@0	117	return true;
michael@0	118	else if ((a == null && b != null) || (a != null && b == null))
michael@0	119	return false;
michael@0	120	else
michael@0	121	return FloatUtils.fuzzyEquals(a.top, b.top)
michael@0	122	&& FloatUtils.fuzzyEquals(a.left, b.left)
michael@0	123	&& FloatUtils.fuzzyEquals(a.right, b.right)
michael@0	124	&& FloatUtils.fuzzyEquals(a.bottom, b.bottom);
michael@0	125	}
michael@0	126	}