Index: content/browser/host_zoom_level_context.h |
diff --git a/content/browser/host_zoom_level_context.h b/content/browser/host_zoom_level_context.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..e45222f7f826ca0a3cb14e85599347a23221a217 |
--- /dev/null |
+++ b/content/browser/host_zoom_level_context.h |
@@ -0,0 +1,61 @@ |
+// 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 "base/macros.h" |
+#include "base/memory/ref_counted.h" |
+#include "base/memory/scoped_ptr.h" |
+#include "content/browser/host_zoom_map_impl.h" |
+#include "content/public/browser/zoom_level_delegate.h" |
+ |
+class PrefService; |
+ |
+namespace content { |
+struct HostZoomLevelContextDeleter; |
+ |
+// 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. |
+class HostZoomLevelContext |
+ : public base::RefCountedThreadSafe<HostZoomLevelContext, |
+ HostZoomLevelContextDeleter> { |
+ public: |
+ explicit HostZoomLevelContext( |
+ scoped_ptr<ZoomLevelDelegate> zoom_level_delegate); |
+ |
+ HostZoomMap* GetHostZoomMap() const { return host_zoom_map_impl_.get(); } |
+ ZoomLevelDelegate* GetZoomLevelDelegate() const { |
+ return zoom_level_delegate_.get(); |
+ } |
+ |
+ protected: |
+ virtual ~HostZoomLevelContext(); |
+ |
+ private: |
+ friend class base::DeleteHelper<HostZoomLevelContext>; |
+ friend class base::RefCountedThreadSafe<HostZoomLevelContext, |
+ HostZoomLevelContextDeleter>; |
+ friend struct HostZoomLevelContextDeleter; |
+ |
+ void DeleteOnCorrectThread() const; |
+ |
+ scoped_ptr<HostZoomMapImpl> host_zoom_map_impl_; |
+ // Release the delegate before the HostZoomMap, in case it is carrying |
+ // any HostZoomMap::Subscription pointers. |
+ scoped_ptr<ZoomLevelDelegate> zoom_level_delegate_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(HostZoomLevelContext); |
+}; |
+ |
+struct HostZoomLevelContextDeleter { |
+ static void Destruct(const HostZoomLevelContext* context) { |
+ context->DeleteOnCorrectThread(); |
+ } |
+}; |
+ |
+} // namespace content |
+ |
+#endif // CONTENT_BROWSER_HOST_ZOOM_LEVEL_CONTEXT_H_ |