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+/*
+ * Copyright (C) 2010 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. 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
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef SpeechInput_h
+#define SpeechInput_h
+
+#if ENABLE(INPUT_SPEECH)
+
+#include "SpeechInputListener.h"
+#include <wtf/Forward.h>
+#include <wtf/HashMap.h>
+#include <wtf/Noncopyable.h>
+
+namespace WebCore {
+
+class IntRect;
+class SpeechInputClient;
+class SpeechInputListener;
+
+// This class connects the input elements requiring speech input with the platform specific
+// speech recognition engine. It provides methods for the input elements to activate speech
+// recognition and methods for the speech recognition engine to return back the results.
+class SpeechInput : public Noncopyable, public SpeechInputListener {
+public:
+    SpeechInput(SpeechInputClient*);
+    virtual ~SpeechInput();
+
+    // Generates a unique ID for the given listener to be used for speech requests.
+    // This should be the first call made by listeners before anything else.
+    int registerListener(SpeechInputListener*);
+
+    // Invoked when the listener is done with recording or getting destroyed.
+    // Failure to unregister may result in crashes if there were any pending speech events.
+    void unregisterListener(int);
+
+    // Methods invoked by the input elements.
+    bool startRecognition(int listenerId, const IntRect& elementRect, const AtomicString& language, const String& grammar);
+    void stopRecording(int);
+    void cancelRecognition(int);
+
+    // SpeechInputListener methods.
+    virtual void didCompleteRecording(int);
+    virtual void didCompleteRecognition(int);
+    virtual void setRecognitionResult(int, const SpeechInputResultArray&);
+
+private:
+    SpeechInputClient* m_client;
+    HashMap<int, SpeechInputListener*> m_listeners;
+    int m_nextListenerId;
+};
+
+} // namespace WebCore
+
+#endif // ENABLE(INPUT_SPEECH)
+
+#endif // SpeechInput_h