Move Range code to gfx.

ui/base/range/range.h

-// 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_BASE_RANGE_RANGE_H_
-#define UI_BASE_RANGE_RANGE_H_
-
-#include <ostream>
-#include <string>
-
-#include "base/basictypes.h"
-#include "ui/base/ui_export.h"
-
-#if defined(OS_MACOSX)
-#if __OBJC__
-#import <Foundation/Foundation.h>
-#else
-typedef struct _NSRange NSRange;
-#endif
-#endif  // defined(OS_MACOSX)
-
-#if defined(OS_WIN)
-#include <windows.h>
-#include <richedit.h>
-#endif
-
-namespace ui {
-
-// A Range contains two integer values that represent a numeric range, like the
-// range of characters in a text selection. A range is made of a start and end
-// position; when they are the same, the Range is akin to a caret. Note that
-// |start_| can be greater than |end_| to respect the directionality of the
-// range.
-class UI_EXPORT Range {
- public:
-  // Creates an empty range {0,0}.
-  Range();
-
-  // Initializes the range with a start and end.
-  Range(size_t start, size_t end);
-
-  // Initializes the range with the same start and end positions.
-  explicit Range(size_t position);
-
-  // Platform constructors.
-#if defined(OS_MACOSX)
-  explicit Range(const NSRange& range);
-#elif defined(OS_WIN)
-  // The |total_length| paramater should be used if the CHARRANGE is set to
-  // {0,-1} to indicate the whole range.
-  Range(const CHARRANGE& range, LONG total_length = -1);
-#endif
-
-  // Returns a range that is invalid, which is {size_t_max,size_t_max}.
-  static const Range InvalidRange();
-
-  // Checks if the range is valid through comparision to InvalidRange().
-  bool IsValid() const;
-
-  // Getters and setters.
-  size_t start() const { return start_; }
-  void set_start(size_t start) { start_ = start; }
-
-  size_t end() const { return end_; }
-  void set_end(size_t end) { end_ = end; }
-
-  // Returns the absolute value of the length.
-  size_t length() const {
-    ptrdiff_t 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.
-  size_t GetMin() const;
-  size_t GetMax() const;
-
-  bool operator==(const Range& other) const;
-  bool operator!=(const Range& other) const;
-  bool EqualsIgnoringDirection(const Range& other) const;
-
-  // Returns true if this range intersects the specified |range|.
-  bool Intersects(const Range& range) const;
-
-  // Returns true if this range contains the specified |range|.
-  bool Contains(const Range& 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).
-  Range Intersect(const Range& range) const;
-
-#if defined(OS_MACOSX)
-  Range& operator=(const NSRange& range);
-
-  // NSRange does not store the directionality of a range, so if this
-  // is_reversed(), the range will get flipped when converted to an NSRange.
-  NSRange ToNSRange() const;
-#elif defined(OS_WIN)
-  CHARRANGE ToCHARRANGE() const;
-#endif
-  // GTK+ has no concept of a range.
-
-  std::string ToString() const;
-
- private:
-  size_t start_;
-  size_t end_;
-};
-
-UI_EXPORT std::ostream& operator<<(std::ostream& os, const Range& range);
-
-}  // namespace ui
-
-#endif  // UI_BASE_RANGE_RANGE_H_