Implement Encoding API

Source/modules/encoding/TextDecoder.h

Index: Source/modules/encoding/TextDecoder.h
diff --git a/Source/core/html/ime/Composition.h b/Source/modules/encoding/TextDecoder.h
similarity index 66%
copy from Source/core/html/ime/Composition.h
copy to Source/modules/encoding/TextDecoder.h
index a180c867ee04b86b3d343b4a05b3ef05f78ae4ab..8b0975047841edfaebf2891c79ab55568da89fa5 100644
--- a/Source/core/html/ime/Composition.h
+++ b/Source/modules/encoding/TextDecoder.h
@@ -28,42 +28,41 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef Composition_h
-#define Composition_h
+#ifndef TextDecoder_h
+#define TextDecoder_h
 
-#include "bindings/v8/ScriptWrappable.h"
-#include "wtf/PassRefPtr.h"
+#include "bindings/v8/Dictionary.h"
+#include "wtf/ArrayBufferView.h"
 #include "wtf/RefCounted.h"
-#include "wtf/RefPtr.h"
+#include "wtf/text/TextCodec.h"
+#include "wtf/text/TextEncoding.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
-class Composition : public RefCounted<Composition>, public ScriptWrappable {
-public:
-    static PassRefPtr<Composition> create();
-    ~Composition();
-
-    String text() const { return m_text; }
-    void setText(const String& text) { m_text = text; }
+class ExceptionState;
 
-    int selectionStart() const { return m_selectionStart; }
-    void setSelectionStart(int selectionStart) { selectionStart = m_selectionStart; }
+class TextDecoder : public RefCounted<TextDecoder> {
+public:
+    static PassRefPtr<TextDecoder> create(const String& label, const Dictionary&, ExceptionState&);
+    virtual ~TextDecoder();
 
-    int selectionEnd() const { return m_selectionEnd; }
-    void setSelectionEnd(int selectionEnd) { selectionEnd = m_selectionEnd; }
+    // Implement the IDL
+    String encoding() const;
+    String decode(ArrayBufferView*, const Dictionary&, ExceptionState&);
+    String decode(ExceptionState& es) { return decode(0, Dictionary(), es); }
 
-    const Vector<unsigned>& getSegments() const;
+    using RefCounted<TextDecoder>::ref;
+    using RefCounted<TextDecoder>::deref;
 
 private:
-    Composition();
+    TextDecoder(const String& encoding, bool fatal);
 
-    String m_text;
-    int m_selectionStart;
-    int m_selectionEnd;
-    Vector<unsigned> m_segments;
+    WTF::TextEncoding m_encoding;
+    OwnPtr<WTF::TextCodec> m_codec;
+    bool m_fatal;
 };
 
 } // namespace WebCore
 
-#endif // Composition_h
+#endif // TextDecoder_h