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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_SPEECH_SPEECH_INPUT_EXTENSION_API_H_
#define CHROME_BROWSER_SPEECH_SPEECH_INPUT_EXTENSION_API_H_
#include "chrome/browser/extensions/extension_function.h"
#include "content/public/browser/notification_observer.h"
// Handles asynchronous operations such as starting or stopping speech
// recognition in the framework of the extension API state machine.
class SpeechInputAsyncFunction : public AsyncExtensionFunction,
public content::NotificationObserver {
public:
// content::NotificationObserver.
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
protected:
SpeechInputAsyncFunction(int start_state, int transition_state,
int end_state, int transition_notification);
virtual ~SpeechInputAsyncFunction();
// ExtensionFunction:
virtual void Run() OVERRIDE;
virtual bool RunImpl() = 0;
private:
// To be defined on construction by derived classes.
int start_state_;
int transition_state_;
int end_state_;
int transition_notification_;
content::NotificationRegistrar registrar_;
bool expecting_transition_;
bool failed_;
};
// Implements experimental.speechInput.start.
class StartSpeechInputFunction : public SpeechInputAsyncFunction {
public:
DECLARE_EXTENSION_FUNCTION("experimental.speechInput.start",
EXPERIMENTAL_SPEECHINPUT_START)
StartSpeechInputFunction();
protected:
// SpeechInputAsyncFunction:
virtual bool RunImpl() OVERRIDE;
private:
virtual ~StartSpeechInputFunction() {}
};
// Implements experimental.speechInput.stop.
class StopSpeechInputFunction : public SpeechInputAsyncFunction {
public:
DECLARE_EXTENSION_FUNCTION("experimental.speechInput.stop",
EXPERIMENTAL_SPEECHINPUT_STOP)
StopSpeechInputFunction();
protected:
// SpeechInputAsyncFunction:
virtual bool RunImpl() OVERRIDE;
private:
virtual ~StopSpeechInputFunction() {}
};
// Implements experimental.speechInput.isRecording.
class IsRecordingSpeechInputFunction : public SyncExtensionFunction {
public:
DECLARE_EXTENSION_FUNCTION("experimental.speechInput.isRecording",
EXPERIMENTAL_SPEECHINPUT_ISRECORDING)
// Called back from SpeechInputExtensionManager in the UI thread.
void SetIsRecordingResult(bool result);
protected:
// ExtensionFunction:
virtual void Run() OVERRIDE;
virtual bool RunImpl() OVERRIDE;
private:
virtual ~IsRecordingSpeechInputFunction() {}
};
#endif // CHROME_BROWSER_SPEECH_SPEECH_INPUT_EXTENSION_API_H_
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