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// 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_DOM_STORAGE_DOM_STORAGE_HOST_H_
#define CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_HOST_H_
#include <map>
#include "base/memory/ref_counted.h"
#include "base/strings/nullable_string16.h"
#include "base/strings/string16.h"
#include "content/browser/dom_storage/dom_storage_namespace.h"
#include "content/common/content_export.h"
#include "content/common/dom_storage/dom_storage_types.h"
class GURL;
namespace content {
class DOMStorageContextImpl;
class DOMStorageHost;
class DOMStorageNamespace;
class DOMStorageArea;
// One instance is allocated in the main process for each client process.
// Used by DOMStorageMessageFilter in Chrome.
// This class is single threaded, and performs blocking file reads/writes,
// so it shouldn't be used on chrome's IO thread.
// See class comments for DOMStorageContextImpl for a larger overview.
class CONTENT_EXPORT DOMStorageHost {
public:
DOMStorageHost(DOMStorageContextImpl* context, int render_process_id);
~DOMStorageHost();
bool OpenStorageArea(int connection_id, int namespace_id,
const GURL& origin);
void CloseStorageArea(int connection_id);
bool ExtractAreaValues(int connection_id, DOMStorageValuesMap* map,
bool* send_log_get_messages);
unsigned GetAreaLength(int connection_id);
base::NullableString16 GetAreaKey(int connection_id, unsigned index);
base::NullableString16 GetAreaItem(int connection_id,
const base::string16& key);
bool SetAreaItem(int connection_id, const base::string16& key,
const base::string16& value, const GURL& page_url,
base::NullableString16* old_value);
void LogGetAreaItem(int connection_id, const base::string16& key,
const base::NullableString16& value);
bool RemoveAreaItem(int connection_id, const base::string16& key,
const GURL& page_url,
base::string16* old_value);
bool ClearArea(int connection_id, const GURL& page_url);
bool HasAreaOpen(int64 namespace_id, const GURL& origin,
int64* alias_namespace_id) const;
// Resets all open areas for the namespace provided. Returns true
// iff there were any areas to reset.
bool ResetOpenAreasForNamespace(int64 namespace_id);
private:
// Struct to hold references needed for areas that are open
// within our associated client process.
struct NamespaceAndArea {
scoped_refptr<DOMStorageNamespace> namespace_;
scoped_refptr<DOMStorageArea> area_;
NamespaceAndArea();
~NamespaceAndArea();
};
typedef std::map<int, NamespaceAndArea > AreaMap;
DOMStorageArea* GetOpenArea(int connection_id);
DOMStorageNamespace* GetNamespace(int connection_id);
void MaybeLogTransaction(
int connection_id,
DOMStorageNamespace::LogType transaction_type,
const GURL& origin,
const GURL& page_url,
const base::string16& key,
const base::NullableString16& value);
scoped_refptr<DOMStorageContextImpl> context_;
AreaMap connections_;
int render_process_id_;
DISALLOW_COPY_AND_ASSIGN(DOMStorageHost);
};
} // namespace content
#endif // CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_HOST_H_
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