1// Copyright 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "ui/views/rect_based_targeting_utils.h"
6
7#include "testing/gtest/include/gtest/gtest.h"
8#include "ui/gfx/rect.h"
9
10namespace views {
11
12TEST(RectBasedTargetingUtils, UsePointBasedTargeting) {
13  gfx::Rect rect_1(gfx::Point(-22, 30), gfx::Size(1, 1));
14  gfx::Rect rect_2(gfx::Point(0, 0), gfx::Size(34, 55));
15  gfx::Rect rect_3(gfx::Point(12, 12), gfx::Size(1, 0));
16  gfx::Rect rect_4(gfx::Point(12, 120), gfx::Size(0, 0));
17
18  EXPECT_TRUE(UsePointBasedTargeting(rect_1));
19  EXPECT_FALSE(UsePointBasedTargeting(rect_2));
20  EXPECT_FALSE(UsePointBasedTargeting(rect_3));
21  EXPECT_FALSE(UsePointBasedTargeting(rect_4));
22}
23
24TEST(RectBasedTargetingUtils, PercentCoveredBy) {
25  gfx::Rect rect_1(gfx::Point(0, 0), gfx::Size(300, 120));
26  gfx::Rect rect_2(gfx::Point(20, 10), gfx::Size(30, 90));
27  gfx::Rect rect_3(gfx::Point(160, 50), gfx::Size(150, 85));
28  gfx::Rect rect_4(gfx::Point(20, 55), gfx::Size(0, 15));
29  float error = 0.001f;
30
31  // Passing in identical rectangles.
32  EXPECT_FLOAT_EQ(1.0f, PercentCoveredBy(rect_1, rect_1));
33
34  // |rect_1| completely contains |rect_2|.
35  EXPECT_FLOAT_EQ(0.075f, PercentCoveredBy(rect_1, rect_2));
36  EXPECT_FLOAT_EQ(1.0f, PercentCoveredBy(rect_2, rect_1));
37
38  // |rect_2| and |rect_3| do not intersect.
39  EXPECT_FLOAT_EQ(0.0f, PercentCoveredBy(rect_2, rect_3));
40
41  // |rect_1| and |rect_3| have a nonzero area of intersection which
42  // is smaller than the area of either rectangle.
43  EXPECT_NEAR(0.272f, PercentCoveredBy(rect_1, rect_3), error);
44  EXPECT_NEAR(0.768f, PercentCoveredBy(rect_3, rect_1), error);
45
46  // |rect_4| has no area.
47  EXPECT_FLOAT_EQ(0.0f, PercentCoveredBy(rect_2, rect_4));
48  EXPECT_FLOAT_EQ(0.0f, PercentCoveredBy(rect_4, rect_2));
49}
50
51TEST(RectBasedTargetingUtils, DistanceSquaredFromCenterToPoint) {
52  gfx::Rect rect_1(gfx::Point(0, 0), gfx::Size(10, 10));
53  gfx::Rect rect_2(gfx::Point(20, 0), gfx::Size(80, 10));
54  gfx::Rect rect_3(gfx::Point(0, 20), gfx::Size(10, 20));
55
56  gfx::Point point_1(5, 5);
57  gfx::Point point_2(25, 5);
58  gfx::Point point_3(11, 15);
59  gfx::Point point_4(33, 44);
60
61  EXPECT_EQ(0, DistanceSquaredFromCenterToPoint(point_1, rect_1));
62  EXPECT_EQ(1225, DistanceSquaredFromCenterToPoint(point_2, rect_2));
63  EXPECT_EQ(3025, DistanceSquaredFromCenterToPoint(point_1, rect_2));
64  EXPECT_EQ(1025, DistanceSquaredFromCenterToPoint(point_2, rect_3));
65  EXPECT_EQ(2501, DistanceSquaredFromCenterToPoint(point_3, rect_2));
66  EXPECT_EQ(136, DistanceSquaredFromCenterToPoint(point_3, rect_1));
67  EXPECT_EQ(980, DistanceSquaredFromCenterToPoint(point_4, rect_3));
68}
69
70}  // namespace views
71