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 #ifndef CONTENT_RENDERER_MEDIA_MIDI_DISPATCHER_H_ 6 #define CONTENT_RENDERER_MEDIA_MIDI_DISPATCHER_H_ 7 8 #include "base/id_map.h" 9 #include "content/public/renderer/render_view_observer.h" 10 #include "third_party/WebKit/public/web/WebMIDIClient.h" 11 12 namespace blink { 13 class WebMIDIPermissionRequest; 14 } 15 16 namespace content { 17 18 class RenderViewImpl; 19 20 // MIDIDispatcher implements WebMIDIClient to handle permissions for using 21 // system exclusive messages. 22 // It works as RenderViewObserver to handle IPC messages between 23 // MIDIDispatcherHost owned by RenderViewHost since permissions are managed in 24 // the browser process. 25 class MIDIDispatcher : public RenderViewObserver, 26 public blink::WebMIDIClient { 27 public: 28 explicit MIDIDispatcher(RenderViewImpl* render_view); 29 virtual ~MIDIDispatcher(); 30 31 private: 32 // RenderView::Observer implementation. 33 virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE; 34 35 // blink::WebMIDIClient implementation. 36 virtual void requestSysExPermission( 37 const blink::WebMIDIPermissionRequest& request) OVERRIDE; 38 virtual void cancelSysExPermissionRequest( 39 const blink::WebMIDIPermissionRequest& request) OVERRIDE; 40 41 // Permission for using system exclusive messages has been set. 42 void OnSysExPermissionApproved(int client_id, bool is_allowed); 43 44 // Each WebMIDIPermissionRequest object is valid until 45 // cancelSysExPermissionRequest() is called with the object, or used to call 46 // WebMIDIPermissionRequest::setIsAllowed(). 47 IDMap<blink::WebMIDIPermissionRequest> requests_; 48 49 DISALLOW_COPY_AND_ASSIGN(MIDIDispatcher); 50 }; 51 52 } // namespace content 53 54 #endif // CONTENT_RENDERER_MEDIA_MIDI_DISPATCHER_H_ 55
