Implement DataCue interface.

Source/core/html/track/DataCue.h

 /*
- * Copyright (c) 2014, Opera Software ASA. All rights reserved.
+ * Copyright (c) 2014, CableLabs Inc. All rights reserved.

[acolwell GONE FROM CHROMIUM, 2014/04/04 23:25:27]

nit: New files should have the Chromium header mentioned in the style guide
(http://dev.chromium.org/blink/coding-style#TOC-License)

  *
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  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. Neither the name of Opera Software ASA nor the names of its
  *    contributors may be used to endorse or promote products derived
  *    from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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-#ifndef SharedWorkerPerformance_h
-#define SharedWorkerPerformance_h
+#ifndef DataCue_h
+#define DataCue_h
 
-#include "heap/Handle.h"
-#include "platform/Supplementable.h"
+#include "bindings/v8/ScriptWrappable.h"
+#include "core/html/track/TextTrackCue.h"
+#include "wtf/ArrayBuffer.h"
 
 namespace WebCore {
 
 class ExecutionContext;
-class SharedWorker;
 
-class SharedWorkerPerformance FINAL : public NoBaseWillBeGarbageCollected<SharedWorkerPerformance>, public WillBeHeapSupplement<SharedWorker> {
-    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(SharedWorkerPerformance);
+class DataCue FINAL : public TextTrackCue, public ScriptWrappable {
 public:
-    static SharedWorkerPerformance& from(SharedWorker&);
+    static PassRefPtr<DataCue> create(ExecutionContext* context, double start, double end, ArrayBuffer* data, ExceptionState& exceptionState)
+    {
+        return adoptRef(new DataCue(context, start, end, data, exceptionState));

[sof, 2014/04/04 19:11:31]

Argument validation could with benefit be put here -- if the conversion into an
ArrayBuffer fails, 'data' will be 0, which you need to check for (and throw
TypeError) before constructing the instance. But not inline here in the class
declaration.

[Brendan Long, 2014/04/04 19:37:51]

The check is already done in setData() (which is used by the constructor), but I
could put an additional one here if you think that's better.

+    }
 
-    static double workerStart(ExecutionContext*, SharedWorker&);
-    double getWorkerStart(ExecutionContext*, SharedWorker&) const;
+    virtual ~DataCue();
 
-    void trace(Visitor*) { }
+    PassRefPtr<ArrayBuffer> data() const;
+    void setData(ArrayBuffer*, ExceptionState&);
+    String text(bool& isNull) const;
+
+    virtual CueType cueType() const OVERRIDE { return Data; }
+
+    virtual ExecutionContext* executionContext() const OVERRIDE;
+
+#ifndef NDEBUG
+    virtual String toString() const OVERRIDE;
+#endif
+
+protected:
+    DataCue(ExecutionContext*, double start, double end, ArrayBuffer*, ExceptionState&);
 
 private:
-    explicit SharedWorkerPerformance();
-    static const char* supplementName();
+    ExecutionContext* m_executionContext;
+    RefPtr<ArrayBuffer> m_data;
+};
 
-    double m_timeOrigin;
-};
+// DataCue is currently the only TextTrackCue subclass.

[acolwell GONE FROM CHROMIUM, 2014/04/04 23:25:27]

nit: Remove comment since it is a lie. :)

+DEFINE_TYPE_CASTS(DataCue, TextTrackCue, cue, cue->cueType() == TextTrackCue::Data, cue.cueType() == TextTrackCue::Data);
 
 } // namespace WebCore
 
-#endif // SharedWorkerPerformance_h
+#endif