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The Google Closure Library is a collection of JavaScript code
designed for use with the Google Closure JavaScript Compiler.
This non-official distribution was prepared by the ClojureScript
team at http://clojure.org/
// Copyright 2006 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
goog.provide('goog.math.RectTest');
goog.setTestOnly('goog.math.RectTest');
goog.require('goog.math.Box');
goog.require('goog.math.Coordinate');
goog.require('goog.math.Rect');
goog.require('goog.math.Size');
goog.require('goog.testing.jsunit');
/**
* Produce legible assertion results. If two rects are not equal, the error
* message will be of the form
* "Expected <(1, 2 - 10 x 10)> (Object) but was <(3, 4 - 20 x 20)> (Object)"
*/
function assertRectsEqual(expected, actual) {
if (!goog.math.Rect.equals(expected, actual)) {
assertEquals(expected, actual);
}
}
/**
* Create a goog.math.Rect with given coordinates.
*
* @param {Array} a Array of numbers with given coordinates for rect,
* with expected order [x1, y1, x2, y2].
* @return {?goog.math.Rect} A rectangle, if coordinates were given.
*/
function createRect(a) {
return a ? new goog.math.Rect(a[0], a[1], a[2] - a[0], a[3] - a[1]) : null;
}
/**
* Create a rect like object.
*
* @param {Array} a Array of numbers with given coordinates for rect,
* with expected order [x1, y1, x2, y2].
* @return {?{left: number, top: number, width: number, height: number}} A rect
* like object.
*/
function createIRect(a) {
if (a) {
return {left: a[0], top: a[1], width: a[2] - a[0], height: a[3] - a[1]};
}
return null;
}
function testRectClone() {
var r = new goog.math.Rect(0, 0, 0, 0);
assertRectsEqual(r, r.clone());
r.left = -10;
r.top = -20;
r.width = 10;
r.height = 20;
assertRectsEqual(r, r.clone());
}
function testRectIntersection() {
var tests = [
[[10, 10, 20, 20], [15, 15, 25, 25], [15, 15, 20, 20]],
[[10, 10, 20, 20], [20, 0, 30, 10], [20, 10, 20, 10]],
[[0, 0, 1, 1], [10, 11, 12, 13], null],
[[11, 12, 98, 99], [22, 23, 34, 35], [22, 23, 34, 35]]
];
var intersectTest = function(r0, r1, expected) {
assertRectsEqual(expected, goog.math.Rect.intersection(r0, r1));
assertRectsEqual(expected, goog.math.Rect.intersection(r1, r0));
// Test in place methods.
var clone = r0.clone();
assertRectsEqual(expected, clone.intersection(r1) ? clone : null);
if (r1.intersection) {
assertRectsEqual(expected, r1.intersection(r0) ? r1 : null);
}
};
for (var i = 0; i < tests.length; ++i) {
var t = tests[i];
var r0 = createRect(t[0]);
var r1 = createRect(t[1]);
var expected = createRect(t[2]);
intersectTest(r0, r1, expected);
}
// Run same tests with IRects.
for (var i = 0; i < tests.length; ++i) {
var t = tests[i];
var r0 = createRect(t[0]);
var r1 = createIRect(t[1]);
var expected = createRect(t[2]);
intersectTest(r0, r1, expected);
}
}
function testRectIntersects() {
var r0 = createRect([10, 10, 20, 20]);
var r1 = createRect([15, 15, 25, 25]);
var r2 = createRect([0, 0, 1, 1]);
var ri0 = createIRect([10, 10, 20, 20]);
var ri1 = createIRect([15, 15, 25, 25]);
var ri2 = createIRect([0, 0, 1, 1]);
assertTrue(goog.math.Rect.intersects(r0, r1));
assertTrue(goog.math.Rect.intersects(r1, r0));
assertTrue(r0.intersects(r1));
assertTrue(r1.intersects(r0));
assertTrue(goog.math.Rect.intersects(r0, ri1));
assertTrue(goog.math.Rect.intersects(ri0, ri1));
assertTrue(goog.math.Rect.intersects(ri1, r0));
assertTrue(r0.intersects(ri1));
assertFalse(goog.math.Rect.intersects(r0, r2));
assertFalse(goog.math.Rect.intersects(r2, r0));
assertFalse(r0.intersects(r2));
assertFalse(r2.intersects(r0));
assertFalse(goog.math.Rect.intersects(ri0, ri2));
assertFalse(goog.math.Rect.intersects(ri2, ri0));
assertFalse(r0.intersects(ri2));
assertFalse(r2.intersects(ri0));
}
function testRectBoundingRect() {
var tests = [
[[10, 10, 20, 20], [15, 15, 25, 25], [10, 10, 25, 25]],
[[10, 10, 20, 20], [20, 0, 30, 10], [10, 0, 30, 20]],
[[0, 0, 1, 1], [10, 11, 12, 13], [0, 0, 12, 13]],
[[11, 12, 98, 99], [22, 23, 34, 35], [11, 12, 98, 99]]
];
for (var i = 0; i < tests.length; ++i) {
var t = tests[i];
var r0 = createRect(t[0]);
var r1 = createRect(t[1]);
var expected = createRect(t[2]);
assertRectsEqual(expected, goog.math.Rect.boundingRect(r0, r1));
assertRectsEqual(expected, goog.math.Rect.boundingRect(r1, r0));
// Test in place methods.
var clone = r0.clone();
clone.boundingRect(r1);
assertRectsEqual(expected, clone);
r1.boundingRect(r0);
assertRectsEqual(expected, r1);
}
}
function testRectDifference() {
// B is the same as A.
assertDifference([10, 10, 20, 20], [10, 10, 20, 20], []);
// B does not touch A.
assertDifference([10, 10, 20, 20], [0, 0, 5, 5], [[10, 10, 20, 20]]);
// B overlaps top half of A.
assertDifference([10, 10, 20, 20], [5, 15, 25, 25], [[10, 10, 20, 15]]);
// B overlaps bottom half of A.
assertDifference([10, 10, 20, 20], [5, 5, 25, 15], [[10, 15, 20, 20]]);
// B overlaps right half of A.
assertDifference([10, 10, 20, 20], [15, 5, 25, 25], [[10, 10, 15, 20]]);
// B overlaps left half of A.
assertDifference([10, 10, 20, 20], [5, 5, 15, 25], [[15, 10, 20, 20]]);
// B touches A at its bottom right corner
assertDifference([10, 10, 20, 20], [20, 20, 30, 30], [[10, 10, 20, 20]]);
// B touches A at its top left corner
assertDifference([10, 10, 20, 20], [5, 5, 10, 10], [[10, 10, 20, 20]]);
// B touches A along its bottom edge
assertDifference([10, 10, 20, 20], [12, 20, 17, 25], [[10, 10, 20, 20]]);
// B splits A horizontally.
assertDifference(
[10, 10, 20, 20], [5, 12, 25, 18], [[10, 10, 20, 12], [10, 18, 20, 20]]);
// B splits A vertically.
assertDifference(
[10, 10, 20, 20], [12, 5, 18, 25], [[10, 10, 12, 20], [18, 10, 20, 20]]);
// B subtracts a notch from the top of A.
assertDifference(
[10, 10, 20, 20], [12, 5, 18, 15],
[[10, 15, 20, 20], [10, 10, 12, 15], [18, 10, 20, 15]]);
// B subtracts a notch from the bottom left of A
assertDifference([1, 6, 3, 9], [1, 7, 2, 9], [[1, 6, 3, 7], [2, 7, 3, 9]]);
// B subtracts a notch from the bottom right of A
assertDifference([1, 6, 3, 9], [2, 7, 3, 9], [[1, 6, 3, 7], [1, 7, 2, 9]]);
// B subtracts a notch from the top left of A
assertDifference([1, 6, 3, 9], [1, 6, 2, 8], [[1, 8, 3, 9], [2, 6, 3, 8]]);
// B subtracts a notch from the top left of A (no coinciding edge)
assertDifference([1, 6, 3, 9], [0, 5, 2, 8], [[1, 8, 3, 9], [2, 6, 3, 8]]);
// B subtracts a hole from the center of A.
assertDifference([-20, -20, -10, -10], [-18, -18, -12, -12], [
[-20, -20, -10, -18], [-20, -12, -10, -10], [-20, -18, -18, -12],
[-12, -18, -10, -12]
]);
}
function assertDifference(a, b, expected) {
var r0 = createRect(a);
var r1 = createRect(b);
var diff = goog.math.Rect.difference(r0, r1);
assertEquals(
'Wrong number of rectangles in difference ', expected.length,
diff.length);
for (var j = 0; j < expected.length; ++j) {
var e = createRect(expected[j]);
if (!goog.math.Rect.equals(e, diff[j])) {
alert(j + ': ' + e + ' != ' + diff[j]);
}
assertRectsEqual(e, diff[j]);
}
// Test in place version
var diff = r0.difference(r1);
assertEquals(
'Wrong number of rectangles in in-place difference ', expected.length,
diff.length);
for (var j = 0; j < expected.length; ++j) {
var e = createRect(expected[j]);
if (!goog.math.Rect.equals(e, diff[j])) {
alert(j + ': ' + e + ' != ' + diff[j]);
}
assertRectsEqual(e, diff[j]);
}
}
function testRectToBox() {
var r = new goog.math.Rect(0, 0, 0, 0);
assertObjectEquals(new goog.math.Box(0, 0, 0, 0), r.toBox());
r.top = 10;
r.left = 10;
r.width = 20;
r.height = 20;
assertObjectEquals(new goog.math.Box(10, 30, 30, 10), r.toBox());
r.top = -10;
r.left = 0;
r.width = 10;
r.height = 10;
assertObjectEquals(new goog.math.Box(-10, 10, 0, 0), r.toBox());
}
function testBoxToRect() {
var box = new goog.math.Box(0, 0, 0, 0);
assertObjectEquals(
new goog.math.Rect(0, 0, 0, 0), goog.math.Rect.createFromBox(box));
box.top = 10;
box.left = 15;
box.right = 23;
box.bottom = 27;
assertObjectEquals(
new goog.math.Rect(15, 10, 8, 17), goog.math.Rect.createFromBox(box));
box.top = -10;
box.left = 3;
box.right = 12;
box.bottom = 7;
assertObjectEquals(
new goog.math.Rect(3, -10, 9, 17), goog.math.Rect.createFromBox(box));
}
function testBoxToRectAndBack() {
rectToBoxAndBackTest(new goog.math.Rect(8, 11, 20, 23));
rectToBoxAndBackTest(new goog.math.Rect(9, 13, NaN, NaN));
rectToBoxAndBackTest(new goog.math.Rect(10, 13, NaN, 21));
rectToBoxAndBackTest(new goog.math.Rect(5, 7, 14, NaN));
}
function rectToBoxAndBackTest(rect) {
var box = rect.toBox();
var rect2 = goog.math.Rect.createFromBox(box);
// Use toString for this test since otherwise NaN != NaN.
assertObjectEquals(rect.toString(), rect2.toString());
}
function testRectToBoxAndBack() {
// This doesn't work if left or top is undefined.
boxToRectAndBackTest(new goog.math.Box(11, 13, 20, 17));
boxToRectAndBackTest(new goog.math.Box(10, NaN, NaN, 11));
boxToRectAndBackTest(new goog.math.Box(9, 14, NaN, 11));
boxToRectAndBackTest(new goog.math.Box(10, NaN, 22, 15));
}
function boxToRectAndBackTest(box) {
var rect = goog.math.Rect.createFromBox(box);
var box2 = rect.toBox();
// Use toString for this test since otherwise NaN != NaN.
assertEquals(box.toString(), box2.toString());
}
function testRectContainsRect() {
var r = new goog.math.Rect(-10, 0, 20, 10);
assertTrue(r.contains(r));
assertFalse(r.contains(new goog.math.Rect(NaN, NaN, NaN, NaN)));
var r2 = new goog.math.Rect(0, 2, 5, 5);
assertTrue(r.contains(r2));
assertFalse(r2.contains(r));
r2.left = -11;
assertFalse(r.contains(r2));
r2.left = 0;
r2.width = 15;
assertFalse(r.contains(r2));
r2.width = 5;
r2.height = 10;
assertFalse(r.contains(r2));
r2.top = 0;
assertTrue(r.contains(r2));
}
function testRectContainsCoordinate() {
var r = new goog.math.Rect(20, 40, 60, 80);
// Test middle.
assertTrue(r.contains(new goog.math.Coordinate(50, 80)));
// Test edges.
assertTrue(r.contains(new goog.math.Coordinate(20, 40)));
assertTrue(r.contains(new goog.math.Coordinate(50, 40)));
assertTrue(r.contains(new goog.math.Coordinate(80, 40)));
assertTrue(r.contains(new goog.math.Coordinate(80, 80)));
assertTrue(r.contains(new goog.math.Coordinate(80, 120)));
assertTrue(r.contains(new goog.math.Coordinate(50, 120)));
assertTrue(r.contains(new goog.math.Coordinate(20, 120)));
assertTrue(r.contains(new goog.math.Coordinate(20, 80)));
// Test outside.
assertFalse(r.contains(new goog.math.Coordinate(0, 0)));
assertFalse(r.contains(new goog.math.Coordinate(50, 0)));
assertFalse(r.contains(new goog.math.Coordinate(100, 0)));
assertFalse(r.contains(new goog.math.Coordinate(100, 80)));
assertFalse(r.contains(new goog.math.Coordinate(100, 160)));
assertFalse(r.contains(new goog.math.Coordinate(50, 160)));
assertFalse(r.contains(new goog.math.Coordinate(0, 160)));
assertFalse(r.contains(new goog.math.Coordinate(0, 80)));
}
function testGetSize() {
assertObjectEquals(
new goog.math.Size(60, 80), new goog.math.Rect(20, 40, 60, 80).getSize());
}
function testGetBottomRight() {
assertObjectEquals(
new goog.math.Coordinate(40, 60),
new goog.math.Rect(10, 20, 30, 40).getBottomRight());
}
function testGetCenter() {
assertObjectEquals(
new goog.math.Coordinate(25, 40),
new goog.math.Rect(10, 20, 30, 40).getCenter());
}
function testGetTopLeft() {
assertObjectEquals(
new goog.math.Coordinate(10, 20),
new goog.math.Rect(10, 20, 30, 40).getTopLeft());
}
function testRectCeil() {
var rect = new goog.math.Rect(11.4, 26.6, 17.8, 9.2);
assertEquals(
'The function should return the target instance', rect, rect.ceil());
assertRectsEqual(new goog.math.Rect(12, 27, 18, 10), rect);
}
function testRectFloor() {
var rect = new goog.math.Rect(11.4, 26.6, 17.8, 9.2);
assertEquals(
'The function should return the target instance', rect, rect.floor());
assertRectsEqual(new goog.math.Rect(11, 26, 17, 9), rect);
}
function testRectRound() {
var rect = new goog.math.Rect(11.4, 26.6, 17.8, 9.2);
assertEquals(
'The function should return the target instance', rect, rect.round());
assertRectsEqual(new goog.math.Rect(11, 27, 18, 9), rect);
}
function testRectTranslateCoordinate() {
var rect = new goog.math.Rect(10, 40, 30, 20);
var c = new goog.math.Coordinate(10, 5);
assertEquals(
'The function should return the target instance', rect,
rect.translate(c));
assertRectsEqual(new goog.math.Rect(20, 45, 30, 20), rect);
}
function testRectTranslateXY() {
var rect = new goog.math.Rect(10, 20, 40, 35);
assertEquals(
'The function should return the target instance', rect,
rect.translate(15, 10));
assertRectsEqual(new goog.math.Rect(25, 30, 40, 35), rect);
}
function testRectTranslateX() {
var rect = new goog.math.Rect(12, 34, 113, 88);
assertEquals(
'The function should return the target instance', rect,
rect.translate(10));
assertRectsEqual(new goog.math.Rect(22, 34, 113, 88), rect);
}
function testRectScaleXY() {
var rect = new goog.math.Rect(10, 30, 100, 60);
assertEquals(
'The function should return the target instance', rect, rect.scale(2, 5));
assertRectsEqual(new goog.math.Rect(20, 150, 200, 300), rect);
}
function testRectScaleFactor() {
var rect = new goog.math.Rect(12, 34, 113, 88);
assertEquals(
'The function should return the target instance', rect, rect.scale(10));
assertRectsEqual(new goog.math.Rect(120, 340, 1130, 880), rect);
}
function testSquaredDistance() {
var rect = new goog.math.Rect(-10, -20, 15, 25);
// Test regions:
// 1 2 3
// +-+
// 4 |5| 6
// +-+
// 7 8 9
// Region 5 (inside the rectangle).
assertEquals(0, rect.squaredDistance(new goog.math.Coordinate(-10, 5)));
assertEquals(0, rect.squaredDistance(new goog.math.Coordinate(5, -20)));
// 1, 2, and 3.
assertEquals(25, rect.squaredDistance(new goog.math.Coordinate(9, 8)));
assertEquals(36, rect.squaredDistance(new goog.math.Coordinate(2, 11)));
assertEquals(53, rect.squaredDistance(new goog.math.Coordinate(12, 7)));
// 4 and 6.
assertEquals(81, rect.squaredDistance(new goog.math.Coordinate(-19, -10)));
assertEquals(64, rect.squaredDistance(new goog.math.Coordinate(13, 0)));
// 7, 8, and 9.
assertEquals(20, rect.squaredDistance(new goog.math.Coordinate(-12, -24)));
assertEquals(9, rect.squaredDistance(new goog.math.Coordinate(0, -23)));
assertEquals(34, rect.squaredDistance(new goog.math.Coordinate(8, -25)));
}
function testDistance() {
var rect = new goog.math.Rect(2, 4, 8, 16);
// Region 5 (inside the rectangle).
assertEquals(0, rect.distance(new goog.math.Coordinate(2, 4)));
assertEquals(0, rect.distance(new goog.math.Coordinate(10, 20)));
// 1, 2, and 3.
assertRoughlyEquals(
Math.sqrt(8), rect.distance(new goog.math.Coordinate(0, 22)), .0001);
assertEquals(8, rect.distance(new goog.math.Coordinate(9, 28)));
assertRoughlyEquals(
Math.sqrt(50), rect.distance(new goog.math.Coordinate(15, 25)), .0001);
// 4 and 6.
assertEquals(7, rect.distance(new goog.math.Coordinate(-5, 6)));
assertEquals(10, rect.distance(new goog.math.Coordinate(20, 10)));
// 7, 8, and 9.
assertEquals(5, rect.distance(new goog.math.Coordinate(-2, 1)));
assertEquals(2, rect.distance(new goog.math.Coordinate(5, 2)));
assertRoughlyEquals(
Math.sqrt(10), rect.distance(new goog.math.Coordinate(1, 1)), .0001);
}
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