widget/gtk/WakeLockListener.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim:expandtab:shiftwidth=2:tabstop=2:
   3  */
   4 /* This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   7
   8 #ifndef __WakeLockListener_h__
   9 #define __WakeLockListener_h__
  10
  11 #include <unistd.h>
  12
  13 #include "mozilla/StaticPtr.h"
  14 #include "nsHashKeys.h"
  15 #include "nsClassHashtable.h"
  16
  17 #include "nsIDOMWakeLockListener.h"
  18
  19 #ifdef MOZ_ENABLE_DBUS
  20 #  include "mozilla/DBusHelpers.h"
  21 #endif
  22
  23 class WakeLockTopic;
  24
  25 /**
  26  * Receives WakeLock events and simply passes it on to the right WakeLockTopic
  27  * to inhibit the screensaver.
  28  */
  29 class WakeLockListener final : public nsIDOMMozWakeLockListener {
  30  public:
  31   NS_DECL_ISUPPORTS;
  32
  33   static WakeLockListener* GetSingleton(bool aCreate = true);
  34   static void Shutdown();
  35
  36   virtual nsresult Callback(const nsAString& topic,
  37                             const nsAString& state) override;
  38
  39  private:
  40   WakeLockListener();
  41   ~WakeLockListener() = default;
  42
  43   bool EnsureDBusConnection();
  44
  45   static mozilla::StaticRefPtr<WakeLockListener> sSingleton;
  46
  47 #ifdef MOZ_ENABLE_DBUS
  48   RefPtr<DBusConnection> mConnection;
  49 #endif
  50   // Map of topic names to |WakeLockTopic|s.
  51   // We assume a small, finite-sized set of topics.
  52   nsClassHashtable<nsStringHashKey, WakeLockTopic> mTopics;
  53 };
  54
  55 #endif  // __WakeLockListener_h__