1 /*
2 * Copyright (c) 2019 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/win/selected_window_context.h"
12
13 namespace webrtc {
14
SelectedWindowContext(HWND selected_window,DesktopRect selected_window_rect,WindowCaptureHelperWin * window_capture_helper)15 SelectedWindowContext::SelectedWindowContext(
16 HWND selected_window,
17 DesktopRect selected_window_rect,
18 WindowCaptureHelperWin* window_capture_helper)
19 : selected_window_(selected_window),
20 selected_window_rect_(selected_window_rect),
21 window_capture_helper_(window_capture_helper) {
22 selected_window_thread_id_ =
23 GetWindowThreadProcessId(selected_window, &selected_window_process_id_);
24 }
25
IsSelectedWindowValid() const26 bool SelectedWindowContext::IsSelectedWindowValid() const {
27 return selected_window_thread_id_ != 0;
28 }
29
IsWindowOwnedBySelectedWindow(HWND hwnd) const30 bool SelectedWindowContext::IsWindowOwnedBySelectedWindow(HWND hwnd) const {
31 // This check works for drop-down menus & dialog pop-up windows.
32 if (GetAncestor(hwnd, GA_ROOTOWNER) == selected_window_) {
33 return true;
34 }
35
36 // Assume that all other windows are unrelated to the selected window.
37 // This will cause some windows that are actually related to be missed,
38 // e.g. context menus and tool-tips, but avoids the risk of capturing
39 // unrelated windows. Using heuristics such as matching the thread and
40 // process Ids suffers from false-positives, e.g. in multi-document
41 // applications.
42
43 return false;
44 }
45
IsWindowOverlappingSelectedWindow(HWND hwnd) const46 bool SelectedWindowContext::IsWindowOverlappingSelectedWindow(HWND hwnd) const {
47 return window_capture_helper_->AreWindowsOverlapping(hwnd, selected_window_,
48 selected_window_rect_);
49 }
50
selected_window() const51 HWND SelectedWindowContext::selected_window() const {
52 return selected_window_;
53 }
54
window_capture_helper() const55 WindowCaptureHelperWin* SelectedWindowContext::window_capture_helper() const {
56 return window_capture_helper_;
57 }
58
59 } // namespace webrtc
60