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/*
* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "modules/desktop_capture/window_finder_win.h"
#include <windows.h>
#include <memory>
namespace webrtc {
WindowFinderWin::WindowFinderWin() = default;
WindowFinderWin::~WindowFinderWin() = default;
WindowId WindowFinderWin::GetWindowUnderPoint(DesktopVector point) {
HWND window = WindowFromPoint(POINT{point.x(), point.y()});
if (!window) {
return kNullWindowId;
}
// The difference between GA_ROOTOWNER and GA_ROOT can be found at
// https://groups.google.com/a/chromium.org/forum/#!topic/chromium-dev/Hirr_DkuZdw.
// In short, we should use GA_ROOT, since we only care about the root window
// but not the owner.
window = GetAncestor(window, GA_ROOT);
if (!window) {
return kNullWindowId;
}
return reinterpret_cast<WindowId>(window);
}
// static
std::unique_ptr<WindowFinder> WindowFinder::Create(
const WindowFinder::Options& options) {
return std::make_unique<WindowFinderWin>();
}
} // namespace webrtc
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