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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 CONTENT_BROWSER_THEME_HELPER_MAC_H_
#define CONTENT_BROWSER_THEME_HELPER_MAC_H_
#include "base/macros.h"
#include "base/memory/singleton.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "third_party/blink/public/platform/mac/web_scrollbar_theme.h"
namespace content {
class ThemeHelperMac : public NotificationObserver {
public:
// Return pointer to the singleton instance for the current process, or NULL
// if none.
static ThemeHelperMac* GetInstance();
// Returns the value of +[NSScroller preferredScrollStyle] as expressed
// as the blink enum value.
static blink::ScrollerStyle GetPreferredScrollerStyle();
private:
friend struct base::DefaultSingletonTraits<ThemeHelperMac>;
ThemeHelperMac();
~ThemeHelperMac() override;
// Overridden from NotificationObserver:
void Observe(int type,
const NotificationSource& source,
const NotificationDetails& details) override;
NotificationRegistrar registrar_;
DISALLOW_COPY_AND_ASSIGN(ThemeHelperMac);
};
} // namespace content
#endif // CONTENT_BROWSER_THEME_HELPER_MAC_H_
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