src/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 "content/renderer/render_view_impl.h"
  11 #include "third_party/WebKit/public/web/WebMIDIPermissionRequest.h"
  12 #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
  13
  14 using blink::WebMIDIPermissionRequest;
  15 using blink::WebSecurityOrigin;
  16
  17 namespace content {
  18
  19 MidiDispatcher::MidiDispatcher(RenderViewImpl* render_view)
  20     : RenderViewObserver(render_view) {
  21 }
  22
  23 MidiDispatcher::~MidiDispatcher() {}
  24
  25 bool MidiDispatcher::OnMessageReceived(const IPC::Message& message) {
  26   bool handled = true;
  27   IPC_BEGIN_MESSAGE_MAP(MidiDispatcher, message)
  28     IPC_MESSAGE_HANDLER(MidiMsg_SysExPermissionApproved,
  29                         OnSysExPermissionApproved)
  30     IPC_MESSAGE_UNHANDLED(handled = false)
  31   IPC_END_MESSAGE_MAP()
  32   return handled;
  33 }
  34
  35 void MidiDispatcher::requestSysExPermission(
  36       const WebMIDIPermissionRequest& request) {
  37   int bridge_id = requests_.Add(new WebMIDIPermissionRequest(request));
  38   WebSecurityOrigin security_origin = request.securityOrigin();
  39   std::string origin = security_origin.toString().utf8();
  40   GURL url(origin);
  41   Send(new MidiHostMsg_RequestSysExPermission(routing_id(), bridge_id, url));
  42 }
  43
  44 void MidiDispatcher::cancelSysExPermissionRequest(
  45     const WebMIDIPermissionRequest& request) {
  46   for (IDMap<WebMIDIPermissionRequest>::iterator it(&requests_);
  47        !it.IsAtEnd();
  48        it.Advance()) {
  49     WebMIDIPermissionRequest* value = it.GetCurrentValue();
  50     if (value->equals(request)) {
  51       base::string16 origin = request.securityOrigin().toString();
  52       Send(new MidiHostMsg_CancelSysExPermissionRequest(
  53           routing_id(), it.GetCurrentKey(), GURL(origin)));
  54       requests_.Remove(it.GetCurrentKey());
  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