content/renderer/media/midi_dispatcher.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/renderer/media/midi_dispatcher.h"
   6
   7 #include "base/bind.h"
   8 #include "base/message_loop/message_loop.h"
   9 #include "content/common/media/midi_messages.h"
  10 #include "third_party/WebKit/public/platform/WebString.h"
  11 #include "third_party/WebKit/public/web/WebMIDIPermissionRequest.h"
  12 #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
  13 #include "third_party/WebKit/public/web/WebUserGestureIndicator.h"
  14
  15 using blink::WebMIDIPermissionRequest;
  16 using blink::WebSecurityOrigin;
  17
  18 namespace content {
  19
  20 MidiDispatcher::MidiDispatcher(RenderFrame* render_frame)
  21     : RenderFrameObserver(render_frame) {
  22 }
  23
  24 MidiDispatcher::~MidiDispatcher() {}
  25
  26 bool MidiDispatcher::OnMessageReceived(const IPC::Message& message) {
  27   bool handled = true;
  28   IPC_BEGIN_MESSAGE_MAP(MidiDispatcher, message)
  29     IPC_MESSAGE_HANDLER(MidiMsg_SysExPermissionApproved,
  30                         OnSysExPermissionApproved)
  31     IPC_MESSAGE_UNHANDLED(handled = false)
  32   IPC_END_MESSAGE_MAP()
  33   return handled;
  34 }
  35
  36 void MidiDispatcher::requestSysexPermission(
  37       const WebMIDIPermissionRequest& request) {
  38   int bridge_id = requests_.Add(new WebMIDIPermissionRequest(request));
  39   WebSecurityOrigin security_origin = request.securityOrigin();
  40   GURL url(security_origin.toString());
  41   Send(new MidiHostMsg_RequestSysExPermission(routing_id(), bridge_id, url,
  42       blink::WebUserGestureIndicator::isProcessingUserGesture()));
  43 }
  44
  45 void MidiDispatcher::cancelSysexPermissionRequest(
  46     const WebMIDIPermissionRequest& request) {
  47   for (Requests::iterator it(&requests_); !it.IsAtEnd(); it.Advance()) {
  48     WebMIDIPermissionRequest* value = it.GetCurrentValue();
  49     if (value->equals(request)) {
  50       base::string16 origin = request.securityOrigin().toString();
  51       Send(new MidiHostMsg_CancelSysExPermissionRequest(
  52           routing_id(), it.GetCurrentKey(), GURL(origin)));
  53       // The request will be removed by OnSysExPermissionApproved once
  54       // the blink MIDIAccessInitializer object is deleted.
  55       break;
  56     }
  57   }
  58 }
  59
  60 void MidiDispatcher::OnSysExPermissionApproved(int bridge_id,
  61                                                bool is_allowed) {
  62   // |request| can be NULL when the request is canceled.
  63   WebMIDIPermissionRequest* request = requests_.Lookup(bridge_id);
  64   if (!request)
  65     return;
  66   request->setIsAllowed(is_allowed);
  67   requests_.Remove(bridge_id);
  68 }
  69
  70 }  // namespace content