| // Copyright 2014 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_HOST_ZOOM_LEVEL_CONTEXT_H_ |
| #define CONTENT_BROWSER_HOST_ZOOM_LEVEL_CONTEXT_H_ |
| |
| #include <memory> |
| |
| #include "base/macros.h" |
| #include "content/browser/host_zoom_map_impl.h" |
| #include "content/public/browser/browser_thread.h" |
| #include "content/public/browser/zoom_level_delegate.h" |
| |
| namespace content { |
| |
| // This class manages a HostZoomMap and associates it with a ZoomLevelDelegate, |
| // if one is provided. It also serves to keep the zoom level machinery details |
| // separate from the owning StoragePartitionImpl. It must be destroyed on the |
| // UI thread. |
| class HostZoomLevelContext { |
| public: |
| explicit HostZoomLevelContext( |
| std::unique_ptr<ZoomLevelDelegate> zoom_level_delegate); |
| |
| HostZoomMap* GetHostZoomMap() const { return host_zoom_map_impl_.get(); } |
| ZoomLevelDelegate* GetZoomLevelDelegate() const { |
| return zoom_level_delegate_.get(); |
| } |
| |
| private: |
| friend struct BrowserThread::DeleteOnThread<BrowserThread::UI>; |
| friend class base::DeleteHelper<HostZoomLevelContext>; |
| |
| ~HostZoomLevelContext(); |
| |
| std::unique_ptr<HostZoomMapImpl> host_zoom_map_impl_; |
| // Release the delegate before the HostZoomMap, in case it is carrying |
| // any HostZoomMap::Subscription pointers. |
| std::unique_ptr<ZoomLevelDelegate> zoom_level_delegate_; |
| |
| DISALLOW_COPY_AND_ASSIGN(HostZoomLevelContext); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_HOST_ZOOM_LEVEL_CONTEXT_H_ |