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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_CHROMEOS_ACCESSIBILITY_MAGNIFICATION_MANAGER_H_
#define CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_MAGNIFICATION_MANAGER_H_
#include "chrome/browser/chromeos/accessibility/accessibility_manager.h"
class Profile;
namespace chromeos {
// MagnificationManager controls the full screen magnifier from chrome-browser
// side (not ash side).
//
// MagnificationManager does:
// - Watch logged-in. Changes the behavior between the login screen and user
// desktop.
// - Watch change of the pref. When the pref changes, the setting of the
// magnifier will interlock with it.
class MagnificationManager {
public:
// Creates an instance of MagnificationManager. This should be called once,
// Returns the existing instance. If there is no instance, creates one.
// because only one instance should exist at the same time.
static void Initialize();
// Deletes the existing instance of MagnificationManager.
static void Shutdown();
// Returns the existing instance. If there is no instance, returns NULL.
static MagnificationManager* Get();
// Returns if the screen magnifier is enabled.
virtual bool IsMagnifierEnabled() const = 0;
// Returns the current type of the screen magnifier.
virtual ui::MagnifierType GetMagnifierType() const = 0;
// Enables the screen magnifier.
virtual void SetMagnifierEnabled(bool enabled) = 0;
// Changes the type of the screen magnifier.
virtual void SetMagnifierType(ui::MagnifierType type) = 0;
// Saves the magnifier scale to the pref.
virtual void SaveScreenMagnifierScale(double scale) = 0;
// Loads the magnifier scale from the pref.
virtual double GetSavedScreenMagnifierScale() const = 0;
virtual void SetProfileForTest(Profile* profile) = 0;
protected:
virtual ~MagnificationManager() {}
};
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_MAGNIFICATION_MANAGER_H_
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