content/browser/renderer_host/media/midi_dispatcher_host.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/renderer_host/media/midi_dispatcher_host.h"
   6
   7 #include "base/bind.h"
   8 #include "content/browser/child_process_security_policy_impl.h"
   9 #include "content/browser/renderer_host/render_view_host_impl.h"
  10 #include "content/common/media/midi_messages.h"
  11 #include "content/public/browser/browser_context.h"
  12 #include "content/public/browser/browser_thread.h"
  13 #include "url/gurl.h"
  14
  15 namespace content {
  16
  17 MIDIDispatcherHost::MIDIDispatcherHost(int render_process_id,
  18                                        BrowserContext* browser_context)
  19     : render_process_id_(render_process_id),
  20       browser_context_(browser_context) {
  21 }
  22
  23 MIDIDispatcherHost::~MIDIDispatcherHost() {
  24 }
  25
  26 bool MIDIDispatcherHost::OnMessageReceived(const IPC::Message& message,
  27                                            bool* message_was_ok) {
  28   bool handled = true;
  29   IPC_BEGIN_MESSAGE_MAP_EX(MIDIDispatcherHost, message, *message_was_ok)
  30     IPC_MESSAGE_HANDLER(MIDIHostMsg_RequestSysExPermission,
  31                         OnRequestSysExPermission)
  32     IPC_MESSAGE_HANDLER(MIDIHostMsg_CancelSysExPermissionRequest,
  33                         OnCancelSysExPermissionRequest)
  34     IPC_MESSAGE_UNHANDLED(handled = false)
  35   IPC_END_MESSAGE_MAP_EX()
  36   return handled;
  37 }
  38
  39 void MIDIDispatcherHost::OverrideThreadForMessage(
  40     const IPC::Message& message, BrowserThread::ID* thread) {
  41   if (IPC_MESSAGE_CLASS(message) == MIDIMsgStart)
  42     *thread = BrowserThread::UI;
  43 }
  44
  45 void MIDIDispatcherHost::OnRequestSysExPermission(int render_view_id,
  46                                                   int bridge_id,
  47                                                   const GURL& origin) {
  48   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  49
  50   browser_context_->RequestMIDISysExPermission(
  51       render_process_id_,
  52       render_view_id,
  53       bridge_id,
  54       origin,
  55       base::Bind(&MIDIDispatcherHost::WasSysExPermissionGranted,
  56                  base::Unretained(this),
  57                  render_view_id,
  58                  bridge_id));
  59 }
  60
  61 void MIDIDispatcherHost::OnCancelSysExPermissionRequest(
  62     int render_view_id,
  63     int bridge_id,
  64     const GURL& requesting_frame) {
  65   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  66   DVLOG(1) << __FUNCTION__ << " " << render_process_id_ << ":" << render_view_id
  67            << ":" << bridge_id;
  68   browser_context_->CancelMIDISysExPermissionRequest(
  69       render_process_id_, render_view_id, bridge_id, requesting_frame);
  70 }
  71 void MIDIDispatcherHost::WasSysExPermissionGranted(int render_view_id,
  72                                                    int bridge_id,
  73                                                    bool success) {
  74   ChildProcessSecurityPolicyImpl::GetInstance()->GrantSendMIDISysExMessage(
  75       render_process_id_);
  76   Send(new MIDIMsg_SysExPermissionApproved(render_view_id, bridge_id, success));
  77 }
  78
  79 }  // namespace content