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/*
* Copyright (c) 2014 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.
*/
#ifndef MODULES_DESKTOP_CAPTURE_FULL_SCREEN_WINDOW_DETECTOR_H_
#define MODULES_DESKTOP_CAPTURE_FULL_SCREEN_WINDOW_DETECTOR_H_
#include <memory>
#include "api/function_view.h"
#include "api/ref_counted_base.h"
#include "api/scoped_refptr.h"
#include "modules/desktop_capture/desktop_capturer.h"
#include "modules/desktop_capture/full_screen_application_handler.h"
#include "rtc_base/constructor_magic.h"
namespace webrtc {
// This is a way to handle switch to full-screen mode for application in some
// specific cases:
// - Chrome on MacOS creates a new window in full-screen mode to
// show a tab full-screen and minimizes the old window.
// - PowerPoint creates new windows in full-screen mode when user goes to
// presentation mode (Slide Show Window, Presentation Window).
//
// To continue capturing in these cases, we try to find the new full-screen
// window using criteria provided by application specific
// FullScreenApplicationHandler.
class FullScreenWindowDetector
: public rtc::RefCountedNonVirtual<FullScreenWindowDetector> {
public:
using ApplicationHandlerFactory =
std::function<std::unique_ptr<FullScreenApplicationHandler>(
DesktopCapturer::SourceId sourceId)>;
FullScreenWindowDetector(
ApplicationHandlerFactory application_handler_factory);
// Returns the full-screen window in place of the original window if all the
// criteria provided by FullScreenApplicationHandler are met, or 0 if no such
// window found.
DesktopCapturer::SourceId FindFullScreenWindow(
DesktopCapturer::SourceId original_source_id);
// The caller should call this function periodically, implementation will
// update internal state no often than twice per second
void UpdateWindowListIfNeeded(
DesktopCapturer::SourceId original_source_id,
rtc::FunctionView<bool(DesktopCapturer::SourceList*)> get_sources);
static rtc::scoped_refptr<FullScreenWindowDetector>
CreateFullScreenWindowDetector();
protected:
std::unique_ptr<FullScreenApplicationHandler> app_handler_;
private:
void CreateApplicationHandlerIfNeeded(DesktopCapturer::SourceId source_id);
ApplicationHandlerFactory application_handler_factory_;
int64_t last_update_time_ms_;
DesktopCapturer::SourceId previous_source_id_;
// Save the source id when we fail to create an instance of
// CreateApplicationHandlerIfNeeded to avoid redundant attempt to do it again.
DesktopCapturer::SourceId no_handler_source_id_;
DesktopCapturer::SourceList window_list_;
RTC_DISALLOW_COPY_AND_ASSIGN(FullScreenWindowDetector);
};
} // namespace webrtc
#endif // MODULES_DESKTOP_CAPTURE_FULL_SCREEN_WINDOW_DETECTOR_H_
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