| // Copyright 2015 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_RANGE_RANGE_F_H_ |
| #define UI_GFX_RANGE_RANGE_F_H_ |
| |
| #include <ostream> |
| #include <string> |
| |
| #include "base/basictypes.h" |
| #include "ui/gfx/gfx_export.h" |
| #include "ui/gfx/range/range.h" |
| |
| namespace gfx { |
| |
| // A float version of Range. RangeF is made of a start and end position; when |
| // they are the same, the range is empty. Note that |start_| can be greater |
| // than |end_| to respect the directionality of the range. |
| class GFX_EXPORT RangeF { |
| public: |
| // Creates an empty range {0,0}. |
| RangeF(); |
| |
| // Initializes the range with a start and end. |
| RangeF(float start, float end); |
| |
| // Initializes the range with the same start and end positions. |
| explicit RangeF(float position); |
| |
| // Returns a range that is invalid, which is {float_max,float_max}. |
| static const RangeF InvalidRange(); |
| |
| // Checks if the range is valid through comparison to InvalidRange(). |
| bool IsValid() const; |
| |
| // Getters and setters. |
| float start() const { return start_; } |
| void set_start(float start) { start_ = start; } |
| |
| float end() const { return end_; } |
| void set_end(float end) { end_ = end; } |
| |
| // Returns the absolute value of the length. |
| float length() const { |
| const float length = end() - start(); |
| return length >= 0 ? length : -length; |
| } |
| |
| bool is_reversed() const { return start() > end(); } |
| bool is_empty() const { return start() == end(); } |
| |
| // Returns the minimum and maximum values. |
| float GetMin() const; |
| float GetMax() const; |
| |
| bool operator==(const RangeF& other) const; |
| bool operator!=(const RangeF& other) const; |
| bool EqualsIgnoringDirection(const RangeF& other) const; |
| |
| // Returns true if this range intersects the specified |range|. |
| bool Intersects(const RangeF& range) const; |
| |
| // Returns true if this range contains the specified |range|. |
| bool Contains(const RangeF& range) const; |
| |
| // Computes the intersection of this range with the given |range|. |
| // If they don't intersect, it returns an InvalidRange(). |
| // The returned range is always empty or forward (never reversed). |
| RangeF Intersect(const RangeF& range) const; |
| RangeF Intersect(const Range& range) const; |
| |
| // Floor/Ceil/Round the start and end values of the given RangeF. |
| Range Floor() const; |
| Range Ceil() const; |
| Range Round() const; |
| |
| std::string ToString() const; |
| |
| private: |
| float start_; |
| float end_; |
| }; |
| |
| GFX_EXPORT std::ostream& operator<<(std::ostream& os, const RangeF& range); |
| |
| } // namespace gfx |
| |
| #endif // UI_GFX_RANGE_RANGE_F_H_ |