98 lines
2.7 KiB
C++
98 lines
2.7 KiB
C++
// 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.
|
|
|
|
#ifndef UI_GFX_GEOMETRY_SIZE_F_H_
|
|
#define UI_GFX_GEOMETRY_SIZE_F_H_
|
|
|
|
#include <iosfwd>
|
|
#include <string>
|
|
|
|
#include "base/compiler_specific.h"
|
|
#include "base/gtest_prod_util.h"
|
|
#include "ui/gfx/geometry/size.h"
|
|
#include "ui/gfx/gfx_export.h"
|
|
|
|
namespace gfx {
|
|
|
|
FORWARD_DECLARE_TEST(SizeTest, TrivialDimensionTests);
|
|
FORWARD_DECLARE_TEST(SizeTest, ClampsToZero);
|
|
FORWARD_DECLARE_TEST(SizeTest, ConsistentClamping);
|
|
|
|
// A floating version of gfx::Size.
|
|
class GFX_EXPORT SizeF {
|
|
public:
|
|
constexpr SizeF() : width_(0.f), height_(0.f) {}
|
|
constexpr SizeF(float width, float height)
|
|
: width_(clamp(width)), height_(clamp(height)) {}
|
|
|
|
constexpr explicit SizeF(const Size& size)
|
|
: SizeF(static_cast<float>(size.width()),
|
|
static_cast<float>(size.height())) {}
|
|
|
|
constexpr float width() const { return width_; }
|
|
constexpr float height() const { return height_; }
|
|
|
|
void set_width(float width) { width_ = clamp(width); }
|
|
void set_height(float height) { height_ = clamp(height); }
|
|
|
|
float GetArea() const;
|
|
|
|
void SetSize(float width, float height) {
|
|
set_width(width);
|
|
set_height(height);
|
|
}
|
|
|
|
void Enlarge(float grow_width, float grow_height);
|
|
|
|
void SetToMin(const SizeF& other);
|
|
void SetToMax(const SizeF& other);
|
|
|
|
bool IsEmpty() const { return !width() || !height(); }
|
|
|
|
void Scale(float scale) {
|
|
Scale(scale, scale);
|
|
}
|
|
|
|
void Scale(float x_scale, float y_scale) {
|
|
SetSize(width() * x_scale, height() * y_scale);
|
|
}
|
|
|
|
std::string ToString() const;
|
|
|
|
private:
|
|
FRIEND_TEST_ALL_PREFIXES(SizeTest, TrivialDimensionTests);
|
|
FRIEND_TEST_ALL_PREFIXES(SizeTest, ClampsToZero);
|
|
FRIEND_TEST_ALL_PREFIXES(SizeTest, ConsistentClamping);
|
|
|
|
static constexpr float kTrivial = 8.f * std::numeric_limits<float>::epsilon();
|
|
|
|
static constexpr float clamp(float f) { return f > kTrivial ? f : 0.f; }
|
|
|
|
float width_;
|
|
float height_;
|
|
};
|
|
|
|
inline bool operator==(const SizeF& lhs, const SizeF& rhs) {
|
|
return lhs.width() == rhs.width() && lhs.height() == rhs.height();
|
|
}
|
|
|
|
inline bool operator!=(const SizeF& lhs, const SizeF& rhs) {
|
|
return !(lhs == rhs);
|
|
}
|
|
|
|
GFX_EXPORT SizeF ScaleSize(const SizeF& p, float x_scale, float y_scale);
|
|
|
|
inline SizeF ScaleSize(const SizeF& p, float scale) {
|
|
return ScaleSize(p, scale, scale);
|
|
}
|
|
|
|
// This is declared here for use in gtest-based unit tests but is defined in
|
|
// the //ui/gfx:test_support target. Depend on that to use this in your unit
|
|
// test. This should not be used in production code - call ToString() instead.
|
|
void PrintTo(const SizeF& size, ::std::ostream* os);
|
|
|
|
} // namespace gfx
|
|
|
|
#endif // UI_GFX_GEOMETRY_SIZE_F_H_
|