2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
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.
11 #ifndef WEBRTC_MODULES_DESKTOP_CAPTURE_MAC_FULL_SCREEN_CHROME_WINDOW_DETECTOR_H_
12 #define WEBRTC_MODULES_DESKTOP_CAPTURE_MAC_FULL_SCREEN_CHROME_WINDOW_DETECTOR_H_
14 #include <ApplicationServices/ApplicationServices.h>
16 #include "webrtc/modules/desktop_capture/window_capturer.h"
17 #include "webrtc/system_wrappers/interface/atomic32.h"
18 #include "webrtc/system_wrappers/interface/tick_util.h"
22 // This is a work around for the Chrome tab full-screen behavior: Chrome
23 // creates a new window in full-screen mode to show a tab full-screen and
24 // minimizes the old window. To continue capturing in this case, we try to
25 // find the new full-screen window using these criteria:
26 // 0. The original shared window is minimized.
27 // 1. The original shared window's owner application name is "Google Chrome".
28 // 2. The original window and the new window have the same title and owner
30 // 3. The new window is full-screen.
31 // 4. The new window didn't exist at least 500 millisecond ago.
33 class FullScreenChromeWindowDetector {
35 FullScreenChromeWindowDetector();
37 void AddRef() { ++ref_count_; }
39 if (--ref_count_ == 0)
43 // Returns the full-screen window in place of the original window if all the
44 // criteria are met, or kCGNullWindowID if no such window found.
45 CGWindowID FindFullScreenWindow(CGWindowID original_window);
47 // The caller should call this function periodically, no less than twice per
49 void UpdateWindowListIfNeeded(CGWindowID original_window);
52 ~FullScreenChromeWindowDetector();
56 // We cache the last two results of the window list, so
57 // |previous_window_list_| is taken at least 500ms before the next Capture()
58 // call. If we only save the last result, we may get false positive (i.e.
59 // full-screen window exists in the list) if Capture() is called too soon.
60 WindowCapturer::WindowList current_window_list_;
61 WindowCapturer::WindowList previous_window_list_;
62 TickTime last_udpate_time_;
64 DISALLOW_COPY_AND_ASSIGN(FullScreenChromeWindowDetector);
69 #endif // WEBRTC_MODULES_DESKTOP_CAPTURE_MAC_FULL_SCREEN_CHROME_WINDOW_DETECTOR_H_