blob: 67c12e94f3da16542943bc02af50f661186497fb [file] [log] [blame]
 // Copyright (c) 2012 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // Defines a simple LayoutUnit based vector class. This class is used to // indicate a distance in two dimensions between two points. Subtracting two // points should produce a vector, and adding a vector to a point produces the // point at the vector's distance from the original point. #ifndef COBALT_LAYOUT_VECTOR2D_LAYOUT_UNIT_H_ #define COBALT_LAYOUT_VECTOR2D_LAYOUT_UNIT_H_ #include #include #include "base/logging.h" #include "cobalt/layout/layout_unit.h" #include "cobalt/math/vector2d_f.h" namespace cobalt { namespace layout { class Vector2dLayoutUnit { public: Vector2dLayoutUnit() : x_(0), y_(0) {} Vector2dLayoutUnit(LayoutUnit x, LayoutUnit y) : x_(x), y_(y) {} void SetVector(LayoutUnit x, LayoutUnit y) { x_ = x; y_ = y; } LayoutUnit x() const { return x_; } void set_x(LayoutUnit x) { x_ = x; } LayoutUnit y() const { return y_; } void set_y(LayoutUnit y) { y_ = y; } // True if both components of the vector are 0. bool IsZero() const; // Add the components of the |other| vector to the current vector. void Add(const Vector2dLayoutUnit& other); // Subtract the components of the |other| vector from the current vector. void Subtract(const Vector2dLayoutUnit& other); void operator+=(const Vector2dLayoutUnit& other) { Add(other); } void operator-=(const Vector2dLayoutUnit& other) { Subtract(other); } LayoutUnit operator[](int i) const { DCHECK_LE(0, i); DCHECK_GE(1, i); return i == 0 ? x_ : y_; } LayoutUnit& operator[](int i) { DCHECK_LE(0, i); DCHECK_GE(1, i); return i == 0 ? x_ : y_; } void SetToMin(const Vector2dLayoutUnit& other) { x_ = x_ <= other.x_ ? x_ : other.x_; y_ = y_ <= other.y_ ? y_ : other.y_; } void SetToMax(const Vector2dLayoutUnit& other) { x_ = x_ >= other.x_ ? x_ : other.x_; y_ = y_ >= other.y_ ? y_ : other.y_; } std::string ToString() const; operator math::Vector2dF() const { return math::Vector2dF(x_.toFloat(), y_.toFloat()); } private: LayoutUnit x_; LayoutUnit y_; }; inline bool operator==(const Vector2dLayoutUnit& lhs, const Vector2dLayoutUnit& rhs) { return lhs.x() == rhs.x() && lhs.y() == rhs.y(); } inline bool operator!=(const Vector2dLayoutUnit& lhs, const Vector2dLayoutUnit& rhs) { return !(lhs == rhs); } inline Vector2dLayoutUnit operator-(const Vector2dLayoutUnit& v) { return Vector2dLayoutUnit(-v.x(), -v.y()); } inline Vector2dLayoutUnit operator+(const Vector2dLayoutUnit& lhs, const Vector2dLayoutUnit& rhs) { Vector2dLayoutUnit result = lhs; result.Add(rhs); return result; } inline Vector2dLayoutUnit operator-(const Vector2dLayoutUnit& lhs, const Vector2dLayoutUnit& rhs) { Vector2dLayoutUnit result = lhs; result.Add(-rhs); return result; } } // namespace layout } // namespace cobalt #endif // COBALT_LAYOUT_VECTOR2D_LAYOUT_UNIT_H_