1 /* 2 * Copyright (c) 2014 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 #ifndef MODULES_DESKTOP_CAPTURE_MAC_FULL_SCREEN_CHROME_WINDOW_DETECTOR_H_ 12 #define MODULES_DESKTOP_CAPTURE_MAC_FULL_SCREEN_CHROME_WINDOW_DETECTOR_H_ 13 14 #include <ApplicationServices/ApplicationServices.h> 15 16 #include "api/refcountedbase.h" 17 #include "modules/desktop_capture/desktop_capturer.h" 18 #include "rtc_base/constructormagic.h" 19 20 namespace webrtc { 21 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 29 // pid. 30 // 3. The new window is full-screen. 31 // 4. The new window didn't exist at least 500 millisecond ago. 32 33 class FullScreenChromeWindowDetector : public rtc::RefCountedBase { 34 public: 35 FullScreenChromeWindowDetector(); 36 37 // Returns the full-screen window in place of the original window if all the 38 // criteria are met, or kCGNullWindowID if no such window found. 39 CGWindowID FindFullScreenWindow(CGWindowID original_window); 40 41 // The caller should call this function periodically, no less than twice per 42 // second. 43 void UpdateWindowListIfNeeded(CGWindowID original_window); 44 45 protected: 46 ~FullScreenChromeWindowDetector() override; 47 48 private: 49 // We cache the last two results of the window list, so 50 // |previous_window_list_| is taken at least 500ms before the next Capture() 51 // call. If we only save the last result, we may get false positive (i.e. 52 // full-screen window exists in the list) if Capture() is called too soon. 53 DesktopCapturer::SourceList current_window_list_; 54 DesktopCapturer::SourceList previous_window_list_; 55 int64_t last_update_time_ns_; 56 57 RTC_DISALLOW_COPY_AND_ASSIGN(FullScreenChromeWindowDetector); 58 }; 59 60 } // namespace webrtc 61 62 #endif // MODULES_DESKTOP_CAPTURE_MAC_FULL_SCREEN_CHROME_WINDOW_DETECTOR_H_ 63