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// Copyright 2013 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_UI_APP_LIST_START_PAGE_SERVICE_H_
#define CHROME_BROWSER_UI_APP_LIST_START_PAGE_SERVICE_H_
#include <vector>
#include "base/basictypes.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/observer_list.h"
#include "base/strings/string16.h"
#include "components/keyed_service/core/keyed_service.h"
#include "content/public/browser/web_contents.h"
#include "ui/app_list/speech_ui_model_observer.h"
namespace extensions {
class Extension;
}
class Profile;
namespace app_list {
class RecommendedApps;
class StartPageObserver;
// StartPageService collects data to be displayed in app list's start page
// and hosts the start page contents.
class StartPageService : public KeyedService {
public:
typedef std::vector<scoped_refptr<const extensions::Extension> >
ExtensionList;
// Gets the instance for the given profile.
static StartPageService* Get(Profile* profile);
void AddObserver(StartPageObserver* observer);
void RemoveObserver(StartPageObserver* observer);
void AppListShown();
void AppListHidden();
void ToggleSpeechRecognition();
// Returns true if the hotword is enabled in the app-launcher.
bool HotwordEnabled();
// They return essentially the same web contents but might return NULL when
// some flag disables the feature.
content::WebContents* GetStartPageContents();
content::WebContents* GetSpeechRecognitionContents();
RecommendedApps* recommended_apps() { return recommended_apps_.get(); }
Profile* profile() { return profile_; }
SpeechRecognitionState state() { return state_; }
void OnSpeechResult(const base::string16& query, bool is_final);
void OnSpeechSoundLevelChanged(int16 level);
void OnSpeechRecognitionStateChanged(SpeechRecognitionState new_state);
private:
friend class StartPageServiceFactory;
// ProfileDestroyObserver to shutdown the service on exiting. WebContents
// depends on the profile and needs to be closed before the profile and its
// keyed service shutdown.
class ProfileDestroyObserver;
// The WebContentsDelegate implementation for the start page. This allows
// getUserMedia() request from the web contents.
class StartPageWebContentsDelegate;
explicit StartPageService(Profile* profile);
virtual ~StartPageService();
void LoadContents();
void UnloadContents();
// KeyedService overrides:
virtual void Shutdown() OVERRIDE;
Profile* profile_;
scoped_ptr<content::WebContents> contents_;
scoped_ptr<StartPageWebContentsDelegate> contents_delegate_;
scoped_ptr<ProfileDestroyObserver> profile_destroy_observer_;
scoped_ptr<RecommendedApps> recommended_apps_;
SpeechRecognitionState state_;
ObserverList<StartPageObserver> observers_;
bool speech_button_toggled_manually_;
bool speech_result_obtained_;
DISALLOW_COPY_AND_ASSIGN(StartPageService);
};
} // namespace app_list
#endif // CHROME_BROWSER_UI_APP_LIST_START_PAGE_SERVICE_H_
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