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// 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 CHROME_BROWSER_EXTENSIONS_EXTENSION_SPECIAL_STORAGE_POLICY_H_
#define CHROME_BROWSER_EXTENSIONS_EXTENSION_SPECIAL_STORAGE_POLICY_H_
#include <map>
#include <string>
#include "base/synchronization/lock.h"
#include "chrome/common/extensions/extension_set.h"
#include "url/gurl.h"
#include "webkit/browser/quota/special_storage_policy.h"
class CookieSettings;
namespace extensions {
class Extension;
}
// Special rights are granted to 'extensions' and 'applications'. The
// storage subsystems and the browsing data remover query this interface
// to determine which origins have these rights.
class ExtensionSpecialStoragePolicy : public quota::SpecialStoragePolicy {
public:
explicit ExtensionSpecialStoragePolicy(CookieSettings* cookie_settings);
// quota::SpecialStoragePolicy methods used by storage subsystems and the
// browsing data remover. These methods are safe to call on any thread.
virtual bool IsStorageProtected(const GURL& origin) OVERRIDE;
virtual bool IsStorageUnlimited(const GURL& origin) OVERRIDE;
virtual bool IsStorageSessionOnly(const GURL& origin) OVERRIDE;
virtual bool CanQueryDiskSize(const GURL& origin) OVERRIDE;
virtual bool IsFileHandler(const std::string& extension_id) OVERRIDE;
virtual bool HasIsolatedStorage(const GURL& origin) OVERRIDE;
virtual bool HasSessionOnlyOrigins() OVERRIDE;
// Methods used by the ExtensionService to populate this class.
void GrantRightsForExtension(const extensions::Extension* extension);
void RevokeRightsForExtension(const extensions::Extension* extension);
void RevokeRightsForAllExtensions();
// Decides whether the storage for |extension|'s web extent needs protection.
bool NeedsProtection(const extensions::Extension* extension);
// Returns the set of extensions protecting this origin. The caller does not
// take ownership of the return value.
const ExtensionSet* ExtensionsProtectingOrigin(const GURL& origin);
protected:
virtual ~ExtensionSpecialStoragePolicy();
private:
class SpecialCollection {
public:
SpecialCollection();
~SpecialCollection();
bool Contains(const GURL& origin);
const ExtensionSet* ExtensionsContaining(const GURL& origin);
bool ContainsExtension(const std::string& extension_id);
bool Add(const extensions::Extension* extension);
bool Remove(const extensions::Extension* extension);
void Clear();
private:
typedef std::map<GURL, ExtensionSet*> CachedResults;
void ClearCache();
ExtensionSet extensions_;
CachedResults cached_results_;
};
void NotifyGranted(const GURL& origin, int change_flags);
void NotifyRevoked(const GURL& origin, int change_flags);
void NotifyCleared();
base::Lock lock_; // Synchronize all access to the collections.
SpecialCollection protected_apps_;
SpecialCollection installed_apps_;
SpecialCollection unlimited_extensions_;
SpecialCollection file_handler_extensions_;
SpecialCollection isolated_extensions_;
scoped_refptr<CookieSettings> cookie_settings_;
};
#endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_SPECIAL_STORAGE_POLICY_H_
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