dom/midi/MIDIPortChild.cpp

   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 #include "mozilla/dom/MIDIPortChild.h"
   8 #include "mozilla/dom/MIDIPort.h"
   9 #include "mozilla/dom/MIDIPortInterface.h"
  10 #include "nsContentUtils.h"
  11
  12 using namespace mozilla;
  13 using namespace mozilla::dom;
  14
  15 MIDIPortChild::MIDIPortChild(const MIDIPortInfo& aPortInfo, bool aSysexEnabled,
  16                              MIDIPort* aPort)
  17     : MIDIPortInterface(aPortInfo, aSysexEnabled), mDOMPort(aPort) {}
  18
  19 void MIDIPortChild::ActorDestroy(ActorDestroyReason aWhy) {
  20   if (mDOMPort) {
  21     mDOMPort->UnsetIPCPort();
  22     MOZ_ASSERT(!mDOMPort);
  23   }
  24   MIDIPortInterface::Shutdown();
  25 }
  26
  27 mozilla::ipc::IPCResult MIDIPortChild::RecvReceive(
  28     nsTArray<MIDIMessage>&& aMsgs) {
  29   if (mDOMPort) {
  30     mDOMPort->Receive(aMsgs);
  31   }
  32   return IPC_OK();
  33 }
  34
  35 mozilla::ipc::IPCResult MIDIPortChild::RecvUpdateStatus(
  36     const uint32_t& aDeviceState, const uint32_t& aConnectionState) {
  37   // Either a device is connected, and can have any connection state, or a
  38   // device is disconnected, and can only be closed or pending.
  39   MOZ_ASSERT(mDeviceState == MIDIPortDeviceState::Connected ||
  40              (mConnectionState == MIDIPortConnectionState::Closed ||
  41               mConnectionState == MIDIPortConnectionState::Pending));
  42   mDeviceState = static_cast<MIDIPortDeviceState>(aDeviceState);
  43   mConnectionState = static_cast<MIDIPortConnectionState>(aConnectionState);
  44   if (mDOMPort) {
  45     mDOMPort->FireStateChangeEvent();
  46   }
  47   return IPC_OK();
  48 }
  49
  50 nsresult MIDIPortChild::GenerateStableId(const nsACString& aOrigin) {
  51   const size_t kIdLength = 64;
  52   mStableId.SetCapacity(kIdLength);
  53   mStableId.Append(Name());
  54   mStableId.Append(Manufacturer());
  55   mStableId.Append(Version());
  56   nsContentUtils::AnonymizeId(mStableId, aOrigin,
  57                               nsContentUtils::OriginFormat::Plain);
  58   return NS_OK;
  59 }