зеркало из https://github.com/mozilla/gecko-dev.git
74 строки
2.8 KiB
C++
74 строки
2.8 KiB
C++
/* -*- 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);
|
|
|
|
private:
|
|
MIDIAccessManager();
|
|
~MIDIAccessManager();
|
|
// 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
|