ui/base/touch/selection_bound.h

// Copyright 2014 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_TOUCH_SELECTION_BOUND_H_
#define UI_BASE_TOUCH_SELECTION_BOUND_H_

#include "ui/base/ui_base_export.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/geometry/point_f.h"

namespace gfx {
class Rect;
class RectF;
}

namespace ui {

// Bound of a selection end-point.
class UI_BASE_EXPORT SelectionBound {
 public:
  enum Type {
    LEFT,
    RIGHT,
    CENTER,
    EMPTY,
    LAST = EMPTY
  };

  SelectionBound();
  SelectionBound(const SelectionBound& other);
  ~SelectionBound();

  Type type() const { return type_; }
  void set_type(Type value) { type_ = value; }

  const gfx::PointF& edge_top() const { return edge_top_; }
  const gfx::Point& edge_top_rounded() const { return edge_top_rounded_; }
  void SetEdgeTop(const gfx::PointF& value);

  const gfx::PointF& edge_bottom() const { return edge_bottom_; }
  const gfx::Point& edge_bottom_rounded() const { return edge_bottom_rounded_; }
  void SetEdgeBottom(const gfx::PointF& value);

  void SetEdge(const gfx::PointF& top, const gfx::PointF& bottom);

  bool visible() const { return visible_; }
  void set_visible(bool value) { visible_ = value; }

  // Returns the vertical difference between rounded top and bottom.
  int GetHeight() const;

 private:
  Type type_;
  gfx::PointF edge_top_;
  gfx::PointF edge_bottom_;
  gfx::Point edge_top_rounded_;
  gfx::Point edge_bottom_rounded_;
  bool visible_;
};

UI_BASE_EXPORT bool operator==(const SelectionBound& lhs,
                               const SelectionBound& rhs);
UI_BASE_EXPORT bool operator!=(const SelectionBound& lhs,
                               const SelectionBound& rhs);

UI_BASE_EXPORT gfx::Rect RectBetweenSelectionBounds(const SelectionBound& b1,
                                                    const SelectionBound& b2);

UI_BASE_EXPORT gfx::RectF RectFBetweenSelectionBounds(const SelectionBound& b1,
                                                      const SelectionBound& b2);

}  // namespace ui

#endif  // UI_BASE_TOUCH_SELECTION_BOUND_H_