dom/midi/MIDIInput.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim:set ts=2 sw=2 sts=2 et cindent: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_dom_MIDIInput_h
   8 #define mozilla_dom_MIDIInput_h
   9
  10 #include "mozilla/dom/MIDIPort.h"
  11
  12 struct JSContext;
  13
  14 namespace mozilla::dom {
  15
  16 class MIDIPortInfo;
  17
  18 /**
  19  * Represents a MIDI Input Port, handles generating incoming message events.
  20  *
  21  */
  22 class MIDIInput final : public MIDIPort {
  23  public:
  24   static RefPtr<MIDIInput> Create(nsPIDOMWindowInner* aWindow,
  25                                   MIDIAccess* aMIDIAccessParent,
  26                                   const MIDIPortInfo& aPortInfo,
  27                                   const bool aSysexEnabled);
  28   ~MIDIInput() = default;
  29
  30   JSObject* WrapObject(JSContext* aCx,
  31                        JS::Handle<JSObject*> aGivenProto) override;
  32
  33   IMPL_EVENT_HANDLER(midimessage);
  34
  35   void StateChange() override;
  36   void EventListenerAdded(nsAtom* aType) override;
  37   void DisconnectFromOwner() override;
  38
  39  private:
  40   explicit MIDIInput(nsPIDOMWindowInner* aWindow);
  41   // Takes an array of IPC MIDIMessage objects and turns them into
  42   // MIDIMessageEvents, which it then fires.
  43   void Receive(const nsTArray<MIDIMessage>& aMsgs) override;
  44
  45   void KeepAliveOnMidimessage();
  46   void DontKeepAliveOnMidimessage();
  47
  48   // If true this object will be kept alive even without direct JS references
  49   bool mKeepAlive;
  50 };
  51
  52 }  // namespace mozilla::dom
  53
  54 #endif  // mozilla_dom_MIDIInput_h