/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim:set ts=2 sw=2 sts=2 et cindent: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef mozilla_dom_MIDIAccessManager_h #define mozilla_dom_MIDIAccessManager_h #include "nsPIDOMWindow.h" #include "mozilla/dom/MIDITypes.h" #include "mozilla/Observer.h" namespace mozilla::dom { class MIDIAccess; class MIDIManagerChild; struct MIDIOptions; class MIDIPortChangeEvent; class MIDIPortInfo; class Promise; /** * MIDIAccessManager manages creation and lifetime of MIDIAccess objects for the * process it lives in. It is in charge of dealing with permission requests, * creating new MIDIAccess objects, and updating live MIDIAccess objects with * new device listings. * * While a process/window can have many MIDIAccess objects, there is only one * MIDIAccessManager for any one process. */ class MIDIAccessManager final { public: NS_INLINE_DECL_REFCOUNTING(MIDIAccessManager); // Handles requests from Navigator for MIDI permissions and MIDIAccess // creation. already_AddRefed<Promise> RequestMIDIAccess(nsPIDOMWindowInner* aWindow, const MIDIOptions& aOptions, ErrorResult& aRv); // Creates a new MIDIAccess object void CreateMIDIAccess(nsPIDOMWindowInner* aWindow, bool aNeedsSysex, Promise* aPromise); // Getter for manager singleton static MIDIAccessManager* Get(); // True if manager singleton has been created static bool IsRunning(); // Send device connection updates to all known MIDIAccess objects. void Update(const MIDIPortList& aPortList); // Adds a device update observer (usually a MIDIAccess object) bool AddObserver(Observer<MIDIPortList>* aObserver); // Removes a device update observer (usually a MIDIAccess object) void RemoveObserver(Observer<MIDIPortList>* aObserver); // Requests the service to update the list of devices void SendRefresh(); private: MIDIAccessManager(); ~MIDIAccessManager(); void StartActor(); // True if object has received a device list from the MIDI platform service. bool mHasPortList; // List of known ports for the system. MIDIPortList mPortList; // Holds MIDIAccess objects until we've received the first list of devices // from the MIDI Service. nsTArray<RefPtr<MIDIAccess>> mAccessHolder; // Device state update observers (usually MIDIAccess objects) ObserverList<MIDIPortList> mChangeObservers; // IPC Object for MIDIManager. Created on first MIDIAccess object creation, // destroyed on last MIDIAccess object destruction. RefPtr<MIDIManagerChild> mChild; }; } // namespace mozilla::dom #endif // mozilla_dom_MIDIAccessManager_h