Refactor RulesRegistryWithCache to RulesRegistry

chrome/browser/extensions/api/declarative/initializing_rules_registry.h

-// 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_API_DECLARATIVE_INITIALIZING_RULES_REGISTRY_H__
-#define CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_INITIALIZING_RULES_REGISTRY_H__
-
-#include "chrome/browser/extensions/api/declarative/rules_registry.h"
-
-#include <map>
-#include <set>
-
-#include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-
-namespace extensions {
-
-// Wrapper class for RulesRegistry objects that takes care that all optional
-// fields of rules are filled with valid values.
-class InitializingRulesRegistry : public RulesRegistry {
- public:
-  enum Defaults { DEFAULT_PRIORITY = 100 };
-
-  explicit InitializingRulesRegistry(scoped_refptr<RulesRegistry> delegate);
-
-  // Implementation for RulesRegistry:
-  virtual std::string AddRules(
-      const std::string& extension_id,
-      const std::vector<linked_ptr<RulesRegistry::Rule> >& rules) OVERRIDE;
-  virtual std::string RemoveRules(
-      const std::string& extension_id,
-      const std::vector<std::string>& rule_identifiers) OVERRIDE;
-  virtual std::string RemoveAllRules(
-      const std::string& extension_id) OVERRIDE;
-  virtual std::string GetRules(
-      const std::string& extension_id,
-      const std::vector<std::string>& rule_identifiers,
-      std::vector<linked_ptr<RulesRegistry::Rule> >* out) OVERRIDE;
-  virtual std::string GetAllRules(
-      const std::string& extension_id,
-      std::vector<linked_ptr<RulesRegistry::Rule> >* out) OVERRIDE;
-  virtual void OnExtensionUnloaded(const std::string& extension_id) OVERRIDE;
-
-  // Returns the number of entries in used_rule_identifiers_ for leak detection.
-  // Every ExtensionId counts as one entry, even if it contains no rules.
-  size_t GetNumberOfUsedRuleIdentifiersForTesting() const;
-
- private:
-  virtual ~InitializingRulesRegistry();
-
-  // Returns whether any existing rule is registered with identifier |rule_id|
-  // for extension |extension_id|.
-  bool IsUniqueId(const std::string& extension_id,
-                  const std::string& rule_id) const;
-
-  // Creates an ID that is unique within the scope of|extension_id|.
-  std::string GenerateUniqueId(const std::string& extension_id);
-
-  // Verifies that all |rules| have unique IDs or initializes them with
-  // unique IDs if they don't have one. In case of duplicate IDs, this function
-  // returns a non-empty error message.
-  std::string CheckAndFillInOptionalRules(
-    const std::string& extension_id,
-    const std::vector<linked_ptr<RulesRegistry::Rule> >& rules);
-
-  // Initializes the priority fields in case they have not been set.
-  void FillInOptionalPriorities(
-      const std::vector<linked_ptr<RulesRegistry::Rule> >& rules);
-
-  // Removes all |identifiers| of |extension_id| from |used_rule_identifiers_|.
-  void RemoveUsedRuleIdentifiers(const std::string& extension_id,
-                                 const std::vector<std::string>& identifiers);
-
-  // Same as RemoveUsedRuleIdentifiers but operates on all rules of
-  // |extension_id|.
-  void RemoveAllUsedRuleIdentifiers(const std::string& extension_id);
-
-  scoped_refptr<RulesRegistry> delegate_;
-
-  typedef std::string ExtensionId;
-  typedef std::string RuleIdentifier;
-  typedef std::map<ExtensionId, std::set<RuleIdentifier> > RuleIdentifiersMap;
-  RuleIdentifiersMap used_rule_identifiers_;
-  int last_generated_rule_identifier_id_;
-
-  DISALLOW_COPY_AND_ASSIGN(InitializingRulesRegistry);
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_INITIALIZING_RULES_REGISTRY_H__