Framing for a DOMStorage backend that does not depend on in-process-webkit.

webkit/dom_storage/dom_storage_area.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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_IN_PROCESS_WEBKIT_DOM_STORAGE_AREA_H_
-#define CONTENT_BROWSER_IN_PROCESS_WEBKIT_DOM_STORAGE_AREA_H_
+#ifndef WEBKIT_DOM_STORAGE_DOM_STORAGE_AREA_H_
+#define WEBKIT_DOM_STORAGE_DOM_STORAGE_AREA_H_
 #pragma once
 
-#include "base/hash_tables.h"
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/nullable_string16.h"
 #include "base/string16.h"
-#include "content/common/dom_storage_common.h"
-#include "googleurl/src/gurl.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebStorageArea.h"
 
-class DOMStorageNamespace;
-// Only use on the WebKit thread.  DOMStorageNamespace manages our registration
-// with DOMStorageContext.
-class DOMStorageArea {
+class FilePath;
+class GURL;
+
+namespace dom_storage {
+
+// Not thread-safe, should only be called on the
+// background thread.
+class DOMStorageArea
+    : public base::RefCounted<DOMStorageArea> {
+
  public:
-  DOMStorageArea(const string16& origin,
-                 int64 id,
-                 DOMStorageNamespace* owner);
-  ~DOMStorageArea();
+  DOMStorageArea(const GURL& origin,
+                 const FilePath& backing_file);

[benm (inactive), 2012/01/25 18:46:59]

I was thinking this would be the path where the backing db should live and it
would be up to this class to create the filename for the backing based on the
GURL?

 
-  unsigned Length();
-  NullableString16 Key(unsigned index);
+  int Length();

[benm (inactive), 2012/01/25 18:46:59]

why int and not unsigned?

+  NullableString16 Key(int index);
   NullableString16 GetItem(const string16& key);
-  NullableString16 SetItem(
+  bool SetItem(
       const string16& key, const string16& value,
-      WebKit::WebStorageArea::Result* result);
-  NullableString16 RemoveItem(const string16& key);
+      NullableString16* old_value);
+  bool RemoveItem(
+      const string16& key,
+      NullableString16* old_value);
   bool Clear();
+
   void PurgeMemory();
 
-  int64 id() const { return id_; }
+ private:
+  friend class base::RefCounted<DOMStorageArea>;
 
-  DOMStorageNamespace* owner() const { return owner_; }
-
- private:
-  // Creates the underlying WebStorageArea on demand.
-  void CreateWebStorageAreaIfNecessary();
-
-  // The origin this storage area represents.
-  string16 origin_;
-  GURL origin_url_;
-
-  // The storage area we wrap.
-  scoped_ptr<WebKit::WebStorageArea> storage_area_;
-
-  // Our storage area id.  Unique to our parent WebKitContext.
-  int64 id_;
-
-  // The DOMStorageNamespace that owns us.
-  DOMStorageNamespace* owner_;
-
-  DISALLOW_IMPLICIT_CONSTRUCTORS(DOMStorageArea);
+  ~DOMStorageArea();
 };
 
-#if defined(COMPILER_GCC)
-namespace __gnu_cxx {
+}  // namespace dom_storage
 
-template<>
-struct hash<DOMStorageArea*> {
-  std::size_t operator()(DOMStorageArea* const& p) const {
-    return reinterpret_cast<std::size_t>(p);
-  }
-};
-
-}  // namespace __gnu_cxx
-#endif
-
-#endif  // CONTENT_BROWSER_IN_PROCESS_WEBKIT_DOM_STORAGE_AREA_H_
+#endif  // WEBKIT_DOM_STORAGE_DOM_STORAGE_AREA_H_