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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_DISPLAY_WIN_BASE_WINDOW_FINDER_WIN_H_
#define UI_DISPLAY_WIN_BASE_WINDOW_FINDER_WIN_H_
#include <set>
#include "base/memory/raw_ref.h"
#include "base/win/windows_types.h"
namespace display {
namespace win {
// Base class used to locate a window. This is intended to be used with the
// various win32 functions that iterate over windows.
//
// A subclass need only override ShouldStopIterating to determine when
// iteration should stop.
class BaseWindowFinderWin {
public:
// Creates a BaseWindowFinderWin with the specified set of HWNDs to ignore.
explicit BaseWindowFinderWin(const std::set<HWND>& ignore);
BaseWindowFinderWin(const BaseWindowFinderWin& finder) = delete;
BaseWindowFinderWin& operator=(const BaseWindowFinderWin& finder) = delete;
virtual ~BaseWindowFinderWin();
protected:
static BOOL CALLBACK WindowCallbackProc(HWND hwnd, LPARAM lParam);
LPARAM as_lparam() {
// Cast must match that in WindowCallbackProc().
return reinterpret_cast<LPARAM>(static_cast<BaseWindowFinderWin*>(this));
}
// Returns true if iteration should stop, false if iteration should continue.
virtual bool ShouldStopIterating(HWND window) = 0;
private:
const raw_ref<const std::set<HWND>> ignore_;
};
} // namespace win
} // namespace display
#endif // UI_DISPLAY_WIN_BASE_WINDOW_FINDER_WIN_H_
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