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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_APPS_APP_LAUNCHER_H_
#define CHROME_APPS_APP_LAUNCHER_H_
#include "base/basictypes.h"
#include "base/callback_forward.h"
class PrefRegistrySimple;
namespace apps {
// Called on the UI thread after determining if the launcher is enabled. A
// boolean flag is passed, which is true if the app launcher is enabled.
typedef base::Callback<void(bool)> OnAppLauncherEnabledCompleted;
// A synchronous check to determine if the app launcher is enabled. If the
// registry needs to be determined to find an accurate answer, this function
// will NOT do so; instead if will default to false (the app launcher is not
// enabled).
// This function does not use the cached preference of whether the launcher
// was enabled or not.
bool MaybeIsAppLauncherEnabled();
// Determine whether the app launcher is enabled or not. This may involve a trip
// to a blocking thread. |completion_callback| is called when an answer is
// ready. This needs to be called on the UI thread.
void GetIsAppLauncherEnabled(
const OnAppLauncherEnabledCompleted& completion_callback);
// Returns whether the app launcher was enabled the last time it was checked.
bool WasAppLauncherEnabled();
} // namespace extensions
#endif // CHROME_APPS_APP_LAUNCHER_H_
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