ui/display/win/local_process_window_finder_win.h

// Copyright 2020 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_DISPLAY_WIN_LOCAL_PROCESS_WINDOW_FINDER_WIN_H_
#define UI_DISPLAY_WIN_LOCAL_PROCESS_WINDOW_FINDER_WIN_H_

#include <shobjidl.h>
#include <wrl/client.h>

#include "ui/display/win/base_window_finder_win.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/native_widget_types.h"

namespace display {
namespace win {

class ScreenWin;

// Helper class to determine if a particular point contains a window from our
// process.
class LocalProcessWindowFinder : public BaseWindowFinderWin {
 public:
  // Returns the hwnd from our process at screen_loc that is not obscured by
  // another window. Returns NULL otherwise.
  static gfx::NativeWindow GetProcessWindowAtPoint(const gfx::Point& screen_loc,
                                                   const std::set<HWND>& ignore,
                                                   ScreenWin* screen_win);

 protected:
  bool ShouldStopIterating(HWND hwnd) override;

 private:
  LocalProcessWindowFinder(const gfx::Point& screen_loc,
                           const std::set<HWND>& ignore);
  LocalProcessWindowFinder(const LocalProcessWindowFinder& finder) = delete;
  LocalProcessWindowFinder& operator=(const LocalProcessWindowFinder& finder) =
      delete;
  ~LocalProcessWindowFinder() override;

  // Position of the mouse in pixel coordinates.
  gfx::Point screen_loc_;

  // The resulting window. This is initially null but set to true in
  // ShouldStopIterating if an appropriate window is found.
  HWND result_;

  // Only used on Win10+.
  Microsoft::WRL::ComPtr<IVirtualDesktopManager> virtual_desktop_manager_;
};

}  // namespace win
}  // namespace display

#endif  // UI_DISPLAY_WIN_LOCAL_PROCESS_WINDOW_FINDER_WIN_H_