| // 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/read_only_shared_memory_region.h" |
| #include "base/memory/writable_shared_memory_region.h" |
| #include "content/public/browser/notification_observer.h" |
| #include "content/public/browser/notification_registrar.h" |
| #include "third_party/blink/public/common/sandbox_support/sandbox_support_mac.h" |
| #include "third_party/blink/public/platform/mac/web_scrollbar_theme.h" |
| |
| #if __OBJC__ |
| @class SystemThemeObserver; |
| #else |
| class SystemThemeObserver; |
| #endif |
| |
| namespace content { |
| |
| // This class is used to monitor macOS system appearance changes and to notify |
| // sandboxed child processes when they change. This class lives on the UI |
| // thread. |
| 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(); |
| |
| // Duplicates a handle to the read-only copy of the system color table, |
| // which can be shared to sandboxed child processes. |
| base::ReadOnlySharedMemoryRegion DuplicateReadOnlyColorMapRegion(); |
| |
| private: |
| ThemeHelperMac(); |
| ~ThemeHelperMac() override; |
| |
| // Looks up the blink::MacSystemColorID corresponding to the NSColor |
| // selector and stores them in the |writable_color_map_| table. |
| void LoadSystemColors(); |
| |
| // Overridden from NotificationObserver: |
| void Observe(int type, |
| const NotificationSource& source, |
| const NotificationDetails& details) override; |
| |
| // ObjC object that observes notifications from the system. |
| SystemThemeObserver* theme_observer_; // strong |
| |
| // Writable and mapped array of SkColor values, indexed by MacSystemColorID. |
| base::WritableSharedMemoryMapping writable_color_map_; |
| |
| // Read-only handle to the |writable_color_map_| that can be duplicated for |
| // sharing to child processes. |
| base::ReadOnlySharedMemoryRegion read_only_color_map_; |
| |
| NotificationRegistrar registrar_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ThemeHelperMac); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_THEME_HELPER_MAC_H_ |