content/browser/theme_helper_mac.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_THEME_HELPER_MAC_H_
   6 #define CONTENT_BROWSER_THEME_HELPER_MAC_H_
   7
   8 #include "base/memory/singleton.h"
   9 #include "content/public/browser/notification_observer.h"
  10 #include "content/public/browser/notification_registrar.h"
  11 #include "third_party/WebKit/public/web/mac/WebScrollbarTheme.h"
  12
  13 namespace content {
  14
  15 class ThemeHelperMac : public NotificationObserver {
  16  public:
  17   // Return pointer to the singleton instance for the current process, or NULL
  18   // if none.
  19   static ThemeHelperMac* GetInstance();
  20
  21   // Returns the value of +[NSScroller preferredScrollStyle] as expressed
  22   // as the blink enum value.
  23   static blink::ScrollerStyle GetPreferredScrollerStyle();
  24
  25   static void SendThemeChangeToAllRenderers(
  26       float initial_button_delay,
  27       float autoscroll_button_delay,
  28       bool jump_on_track_click,
  29       blink::ScrollerStyle preferred_scroller_style,
  30       bool redraw);
  31
  32  private:
  33   friend struct DefaultSingletonTraits<ThemeHelperMac>;
  34
  35   ThemeHelperMac();
  36   ~ThemeHelperMac() override;
  37
  38   // Overridden from NotificationObserver:
  39   void Observe(int type,
  40                const NotificationSource& source,
  41                const NotificationDetails& details) override;
  42
  43   NotificationRegistrar registrar_;
  44
  45   DISALLOW_COPY_AND_ASSIGN(ThemeHelperMac);
  46 };
  47
  48 }  // namespace content
  49
  50 #endif  // CONTENT_BROWSER_THEME_HELPER_MAC_H_