src/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     : BrowserMessageFilter(MidiMsgStart),
  20       render_process_id_(render_process_id),
  21       browser_context_(browser_context) {
  22 }
  23
  24 MidiDispatcherHost::~MidiDispatcherHost() {
  25 }
  26
  27 bool MidiDispatcherHost::OnMessageReceived(const IPC::Message& message,
  28                                            bool* message_was_ok) {
  29   bool handled = true;
  30   IPC_BEGIN_MESSAGE_MAP_EX(MidiDispatcherHost, message, *message_was_ok)
  31     IPC_MESSAGE_HANDLER(MidiHostMsg_RequestSysExPermission,
  32                         OnRequestSysExPermission)
  33     IPC_MESSAGE_HANDLER(MidiHostMsg_CancelSysExPermissionRequest,
  34                         OnCancelSysExPermissionRequest)
  35     IPC_MESSAGE_UNHANDLED(handled = false)
  36   IPC_END_MESSAGE_MAP_EX()
  37   return handled;
  38 }
  39
  40 void MidiDispatcherHost::OverrideThreadForMessage(
  41     const IPC::Message& message, BrowserThread::ID* thread) {
  42   if (IPC_MESSAGE_CLASS(message) == MidiMsgStart)
  43     *thread = BrowserThread::UI;
  44 }
  45
  46 void MidiDispatcherHost::OnRequestSysExPermission(int render_view_id,
  47                                                   int bridge_id,
  48                                                   const GURL& origin,
  49                                                   bool user_gesture) {
  50   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  51
  52   browser_context_->RequestMidiSysExPermission(
  53       render_process_id_,
  54       render_view_id,
  55       bridge_id,
  56       origin,
  57       user_gesture,
  58       base::Bind(&MidiDispatcherHost::WasSysExPermissionGranted,
  59                  base::Unretained(this),
  60                  render_view_id,
  61                  bridge_id));
  62 }
  63
  64 void MidiDispatcherHost::OnCancelSysExPermissionRequest(
  65     int render_view_id,
  66     int bridge_id,
  67     const GURL& requesting_frame) {
  68   DCHECK_CURRENTLY_ON(BrowserThread::UI);
  69   DVLOG(1) << __FUNCTION__ << " " << render_process_id_ << ":" << render_view_id
  70            << ":" << bridge_id;
  71   browser_context_->CancelMidiSysExPermissionRequest(
  72       render_process_id_, render_view_id, bridge_id, requesting_frame);
  73 }
  74 void MidiDispatcherHost::WasSysExPermissionGranted(int render_view_id,
  75                                                    int bridge_id,
  76                                                    bool success) {
  77   ChildProcessSecurityPolicyImpl::GetInstance()->GrantSendMidiSysExMessage(
  78       render_process_id_);
  79   Send(new MidiMsg_SysExPermissionApproved(render_view_id, bridge_id, success));
  80 }
  81
  82 }  // namespace content