window_finder_win.cc (1542B)
1 /* 2 * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include "modules/desktop_capture/window_finder_win.h" 12 13 #include <windows.h> 14 15 #include <memory> 16 17 #include "modules/desktop_capture/desktop_capture_types.h" 18 #include "modules/desktop_capture/desktop_geometry.h" 19 #include "modules/desktop_capture/window_finder.h" 20 21 namespace webrtc { 22 23 WindowFinderWin::WindowFinderWin() = default; 24 WindowFinderWin::~WindowFinderWin() = default; 25 26 WindowId WindowFinderWin::GetWindowUnderPoint(DesktopVector point) { 27 HWND window = WindowFromPoint(POINT{point.x(), point.y()}); 28 if (!window) { 29 return kNullWindowId; 30 } 31 32 // The difference between GA_ROOTOWNER and GA_ROOT can be found at 33 // https://groups.google.com/a/chromium.org/forum/#!topic/chromium-dev/Hirr_DkuZdw. 34 // In short, we should use GA_ROOT, since we only care about the root window 35 // but not the owner. 36 window = GetAncestor(window, GA_ROOT); 37 if (!window) { 38 return kNullWindowId; 39 } 40 41 return reinterpret_cast<WindowId>(window); 42 } 43 44 // static 45 std::unique_ptr<WindowFinder> WindowFinder::Create( 46 const WindowFinder::Options& options) { 47 return std::make_unique<WindowFinderWin>(); 48 } 49 50 } // namespace webrtc