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#ifndef WEBKIT_TOOLS_TEST_SHELL_WEBWIDGET_HOST_H__
#define WEBKIT_TOOLS_TEST_SHELL_WEBWIDGET_HOST_H__

#include <windows.h>

#include "base/gfx/rect.h"
#include "base/scoped_ptr.h"

class WebWidget;
class WebWidgetDelegate;

namespace gfx {
class PlatformCanvasWin;
class Size;
}

// This class is a simple HWND-based host for a WebWidget
class WebWidgetHost {
 public:
  // The new instance is deleted once the associated HWND is destroyed.  The
  // newly created window should be resized after it is created, using the
  // MoveWindow (or equivalent) function.
  static WebWidgetHost* Create(HWND parent_window, WebWidgetDelegate* delegate);

  static WebWidgetHost* FromWindow(HWND hwnd);

  HWND window_handle() const { return hwnd_; }
  WebWidget* webwidget() const { return webwidget_; }

  void DidInvalidateRect(const gfx::Rect& rect);
  void DidScrollRect(int dx, int dy, const gfx::Rect& clip_rect);
  void SetCursor(HCURSOR cursor);

  void DiscardBackingStore();

 protected:
  WebWidgetHost();
  ~WebWidgetHost();

  // Per-class wndproc.  Returns true if the event should be swallowed.
  virtual bool WndProc(UINT message, WPARAM wparam, LPARAM lparam);

  void Paint();
  void Resize(LPARAM lparam);
  void MouseEvent(UINT message, WPARAM wparam, LPARAM lparam);
  void WheelEvent(WPARAM wparam, LPARAM lparam);
  void KeyEvent(UINT message, WPARAM wparam, LPARAM lparam);
  void CaptureLostEvent();
  void SetFocus(bool enable);

  void TrackMouseLeave(bool enable);
  void ResetScrollRect();
  void PaintRect(const gfx::Rect& rect);

  void set_painting(bool value) {
#ifndef NDEBUG
    painting_ = value;
#endif
  }

  static LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

  HWND hwnd_;
  WebWidget* webwidget_;
  scoped_ptr<gfx::PlatformCanvasWin> canvas_;

  // specifies the portion of the webwidget that needs painting
  gfx::Rect paint_rect_;

  // specifies the portion of the webwidget that needs scrolling
  gfx::Rect scroll_rect_;
  int scroll_dx_;
  int scroll_dy_;

  bool track_mouse_leave_;

#ifndef NDEBUG
  bool painting_;
#endif
};

#endif  // WEBKIT_TOOLS_TEST_SHELL_WEBWIDGET_HOST_H__