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_frame_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 // MidiDispatcher implements WebMIDIClient to handle permissions for using 19 // system exclusive messages. 20 // It works as RenderFrameObserver to handle IPC messages between 21 // MidiDispatcherHost owned by WebContents since permissions are managed in 22 // the browser process. 23 class MidiDispatcher : public RenderFrameObserver, 24 public blink::WebMIDIClient { 25 public: 26 explicit MidiDispatcher(RenderFrame* render_frame); 27 virtual ~MidiDispatcher(); 28 29 private: 30 // RenderFrameObserver implementation. 31 virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE; 32 33 // blink::WebMIDIClient implementation. 34 virtual void requestSysexPermission( 35 const blink::WebMIDIPermissionRequest& request); 36 virtual void cancelSysexPermissionRequest( 37 const blink::WebMIDIPermissionRequest& request); 38 39 // Permission for using system exclusive messages has been set. 40 void OnSysExPermissionApproved(int client_id, bool is_allowed); 41 42 // Each WebMIDIPermissionRequest object is valid until 43 // cancelSysexPermissionRequest() is called with the object, or used to call 44 // WebMIDIPermissionRequest::setIsAllowed(). 45 typedef IDMap<blink::WebMIDIPermissionRequest, IDMapOwnPointer> Requests; 46 Requests requests_; 47 48 DISALLOW_COPY_AND_ASSIGN(MidiDispatcher); 49 }; 50 51 } // namespace content 52 53 #endif // CONTENT_RENDERER_MEDIA_MIDI_DISPATCHER_H_ 54
