tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

desktop_configuration_monitor.cc (2688B)

      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 #include "modules/desktop_capture/mac/desktop_configuration_monitor.h"
     12 
     13 #include "modules/desktop_capture/mac/desktop_configuration.h"
     14 #include "rtc_base/logging.h"
     15 #include "rtc_base/trace_event.h"
     16 
     17 namespace webrtc {
     18 
     19 DesktopConfigurationMonitor::DesktopConfigurationMonitor() {
     20  CGError err = CGDisplayRegisterReconfigurationCallback(
     21      DesktopConfigurationMonitor::DisplaysReconfiguredCallback, this);
     22  if (err != kCGErrorSuccess)
     23    RTC_LOG(LS_ERROR) << "CGDisplayRegisterReconfigurationCallback " << err;
     24  MutexLock lock(&desktop_configuration_lock_);
     25  desktop_configuration_ = MacDesktopConfiguration::GetCurrent(
     26      MacDesktopConfiguration::TopLeftOrigin);
     27 }
     28 
     29 DesktopConfigurationMonitor::~DesktopConfigurationMonitor() {
     30  CGError err = CGDisplayRemoveReconfigurationCallback(
     31      DesktopConfigurationMonitor::DisplaysReconfiguredCallback, this);
     32  if (err != kCGErrorSuccess)
     33    RTC_LOG(LS_ERROR) << "CGDisplayRemoveReconfigurationCallback " << err;
     34 }
     35 
     36 MacDesktopConfiguration DesktopConfigurationMonitor::desktop_configuration() {
     37  MutexLock lock(&desktop_configuration_lock_);
     38  return desktop_configuration_;
     39 }
     40 
     41 // static
     42 // This method may be called on any system thread.
     43 void DesktopConfigurationMonitor::DisplaysReconfiguredCallback(
     44    CGDirectDisplayID display,
     45    CGDisplayChangeSummaryFlags flags,
     46    void* user_parameter) {
     47  DesktopConfigurationMonitor* monitor =
     48      reinterpret_cast<DesktopConfigurationMonitor*>(user_parameter);
     49  monitor->DisplaysReconfigured(display, flags);
     50 }
     51 
     52 void DesktopConfigurationMonitor::DisplaysReconfigured(
     53    CGDirectDisplayID display,
     54    CGDisplayChangeSummaryFlags flags) {
     55  TRACE_EVENT0("webrtc", "DesktopConfigurationMonitor::DisplaysReconfigured");
     56  RTC_LOG(LS_INFO) << "DisplaysReconfigured: "
     57                      "DisplayID "
     58                   << display << "; ChangeSummaryFlags " << flags;
     59 
     60  if (flags & kCGDisplayBeginConfigurationFlag) {
     61    reconfiguring_displays_.insert(display);
     62    return;
     63  }
     64 
     65  reconfiguring_displays_.erase(display);
     66  if (reconfiguring_displays_.empty()) {
     67    MutexLock lock(&desktop_configuration_lock_);
     68    desktop_configuration_ = MacDesktopConfiguration::GetCurrent(
     69        MacDesktopConfiguration::TopLeftOrigin);
     70  }
     71 }
     72 
     73 }  // namespace webrtc