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      1 /*
      2  * Copyright (C) 2013 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef MIDIAccessPromise_h
     32 #define MIDIAccessPromise_h
     33 
     34 #include "bindings/v8/ScriptWrappable.h"
     35 #include "core/dom/ActiveDOMObject.h"
     36 #include "modules/webmidi/MIDIOptions.h"
     37 #include "wtf/OwnPtr.h"
     38 #include "wtf/PassRefPtr.h"
     39 #include "wtf/RefCounted.h"
     40 
     41 namespace WebCore {
     42 
     43 class DOMError;
     44 class MIDIAccess;
     45 class MIDIErrorCallback;
     46 class MIDISuccessCallback;
     47 class ExecutionContext;
     48 
     49 struct MIDIOptions;
     50 
     51 class MIDIAccessPromise : public RefCounted<MIDIAccessPromise>, public ScriptWrappable, public ActiveDOMObject {
     52 public:
     53     static PassRefPtr<MIDIAccessPromise> create(ExecutionContext*, const Dictionary&);
     54     virtual ~MIDIAccessPromise();
     55 
     56     // ActiveDOMObject
     57     virtual bool hasPendingActivity() const OVERRIDE;
     58     virtual void stop() OVERRIDE;
     59 
     60     MIDIOptions* options() { return m_options.get(); }
     61 
     62     void fulfill();
     63     void reject(PassRefPtr<DOMError>);
     64 
     65     void then(PassOwnPtr<MIDISuccessCallback>, PassOwnPtr<MIDIErrorCallback>);
     66 
     67 private:
     68     enum State {
     69         Pending,
     70         Accepted,
     71         Rejected,
     72         Invoked,
     73     };
     74 
     75     MIDIAccessPromise(ExecutionContext*, const Dictionary&);
     76 
     77     void clear();
     78 
     79     State m_state;
     80     OwnPtr<MIDISuccessCallback> m_successCallback;
     81     OwnPtr<MIDIErrorCallback> m_errorCallback;
     82     OwnPtr<MIDIOptions> m_options;
     83     RefPtr<DOMError> m_error;
     84     RefPtr<MIDIAccess> m_access;
     85 };
     86 
     87 } // namespace WebCore
     88 
     89 #endif // MIDIAccessPromise_h
     90