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Side by Side Diff: ui/gfx/vector2d.h

Issue 109433013: Move geometric types to a separate, more lightweight target. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: . Created 7 years ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 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 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 // Defines a simple integer vector class. This class is used to indicate a 5 // TODO(beng): remove once callsites are patched.
6 // distance in two dimensions between two points. Subtracting two points should 6 #include "ui/gfx/geometry/vector2d.h"
7 // produce a vector, and adding a vector to a point produces the point at the
8 // vector's distance from the original point.
9 7
10 #ifndef UI_GFX_VECTOR2D_H_
11 #define UI_GFX_VECTOR2D_H_
12
13 #include <string>
14
15 #include "base/basictypes.h"
16 #include "ui/gfx/gfx_export.h"
17 #include "ui/gfx/vector2d_f.h"
18
19 namespace gfx {
20
21 class GFX_EXPORT Vector2d {
22 public:
23 Vector2d() : x_(0), y_(0) {}
24 Vector2d(int x, int y) : x_(x), y_(y) {}
25
26 int x() const { return x_; }
27 void set_x(int x) { x_ = x; }
28
29 int y() const { return y_; }
30 void set_y(int y) { y_ = y; }
31
32 // True if both components of the vector are 0.
33 bool IsZero() const;
34
35 // Add the components of the |other| vector to the current vector.
36 void Add(const Vector2d& other);
37 // Subtract the components of the |other| vector from the current vector.
38 void Subtract(const Vector2d& other);
39
40 void operator+=(const Vector2d& other) { Add(other); }
41 void operator-=(const Vector2d& other) { Subtract(other); }
42
43 void SetToMin(const Vector2d& other) {
44 x_ = x_ <= other.x_ ? x_ : other.x_;
45 y_ = y_ <= other.y_ ? y_ : other.y_;
46 }
47
48 void SetToMax(const Vector2d& other) {
49 x_ = x_ >= other.x_ ? x_ : other.x_;
50 y_ = y_ >= other.y_ ? y_ : other.y_;
51 }
52
53 // Gives the square of the diagonal length of the vector. Since this is
54 // cheaper to compute than Length(), it is useful when you want to compare
55 // relative lengths of different vectors without needing the actual lengths.
56 int64 LengthSquared() const;
57 // Gives the diagonal length of the vector.
58 float Length() const;
59
60 std::string ToString() const;
61
62 operator Vector2dF() const { return Vector2dF(x_, y_); }
63
64 private:
65 int x_;
66 int y_;
67 };
68
69 inline bool operator==(const Vector2d& lhs, const Vector2d& rhs) {
70 return lhs.x() == rhs.x() && lhs.y() == rhs.y();
71 }
72
73 inline Vector2d operator-(const Vector2d& v) {
74 return Vector2d(-v.x(), -v.y());
75 }
76
77 inline Vector2d operator+(const Vector2d& lhs, const Vector2d& rhs) {
78 Vector2d result = lhs;
79 result.Add(rhs);
80 return result;
81 }
82
83 inline Vector2d operator-(const Vector2d& lhs, const Vector2d& rhs) {
84 Vector2d result = lhs;
85 result.Add(-rhs);
86 return result;
87 }
88
89 } // namespace gfx
90
91 #endif // UI_GFX_VECTOR2D_H_
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