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// WindowUtil: OS-independent utility functions to manage candidate windows

#ifndef MOZC_RENDERER_WINDOW_UTIL_H_
#define MOZC_RENDERER_WINDOW_UTIL_H_

namespace mozc {
struct Point;
struct Rect;
struct Size;
namespace renderer {

class WindowUtil {
 public:
  // Returns the appropriate candidate window position in the screen
  // coordinate.  |zero_point_offset| is the point in the candidate
  // window which should be aligned to the preedit.
  // |working_area| is the available area in the current monitor.  If
  // caller fails to obtain |working_area|, set its width or height as
  // 0.  Then it doesn't care the monitor.
  static Rect GetWindowRectForMainWindowFromPreeditRect(
      const Rect &preedit_rect, const Size &window_size,
      const Point &zero_point_offset, const Rect &working_area);

  // Returns the appropriate candidate window position in the screen
  // coordinate.  |zero_point_offset| is the point in the candidate
  // window which should be aligned to the target point.
  // |working_area| is the available area in the current monitor.  If
  // caller fails to obtain |working_area|, set its width or height as
  // 0.  Then it doesn't care the monitor.
  static Rect GetWindowRectForMainWindowFromTargetPoint(
      const Point &target_point, const Size &window_size,
      const Point &zero_point_offset, const Rect &working_area);

  // Returns the appropriate candidate window position in the screen
  // coordinate.  |zero_point_offset| is the point in the candidate
  // window which should be aligned to the preedit.
  // |working_area| is the available area in the current monitor.  If
  // caller fails to obtain |working_area|, set its width or height as
  // 0.  Then it doesn't care the monitor.
  static Rect GetWindowRectForMainWindowFromTargetPointAndPreedit(
      const Point &target_point, const Rect &preedit_rect,
      const Size &window_size, const Point &zero_point_offset,
      const Rect &working_area, bool vertical);

  // Returns the appropriate cascading window position in the screen
  // coordinate.  |zero_point_offset| is the point in the cascading
  // window which should be aligned to the selected row in the
  // candidate window.
  // |working_area| is the available area in the current monitor.  If
  // caller fails to obtain |working_area|, set its width or height as
  // 0.  Then it doesn't care the monitor.
  static Rect GetWindowRectForCascadingWindow(const Rect &selected_row,
                                              const Size &window_size,
                                              const Point &zero_point_offset,
                                              const Rect &working_area);

  // Returns the appropriate infolist window position in the screen
  // coordinate.  |window_size| is the size of the infolist window.
  // |candidate_rect| is the rect of the candidate window.
  // |working_area| is the available area in the current monitor.  If
  // caller fails to obtain |working_area|, set its width or height as
  // 0.  Then it doesn't care the monitor.
  static Rect GetWindowRectForInfolistWindow(const Size &window_size,
                                             const Rect &candidate_rect,
                                             const Rect &working_area);
};
}  // namespace renderer
}  // namespace mozc

#endif  // MOZC_RENDERER_WINDOW_UTIL_H_
