components/content_settings/core/browser/content_settings_rule.h

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // Interface for objects providing content setting rules.
   6
   7 #ifndef COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_CONTENT_SETTINGS_RULE_H_
   8 #define COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_CONTENT_SETTINGS_RULE_H_
   9
  10 #include "base/compiler_specific.h"
  11 #include "base/memory/linked_ptr.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/memory/scoped_vector.h"
  14 #include "base/synchronization/lock.h"
  15 #include "base/values.h"
  16 #include "components/content_settings/core/common/content_settings_pattern.h"
  17
  18 namespace content_settings {
  19
  20 struct Rule {
  21   Rule();
  22   // Rule takes ownership of |value|.
  23   Rule(const ContentSettingsPattern& primary_pattern,
  24        const ContentSettingsPattern& secondary_pattern,
  25        base::Value* value);
  26   ~Rule();
  27
  28   ContentSettingsPattern primary_pattern;
  29   ContentSettingsPattern secondary_pattern;
  30   linked_ptr<base::Value> value;
  31 };
  32
  33 class RuleIterator {
  34  public:
  35   virtual ~RuleIterator();
  36   virtual bool HasNext() const = 0;
  37   virtual Rule Next() = 0;
  38 };
  39
  40 class EmptyRuleIterator : public RuleIterator {
  41  public:
  42   ~EmptyRuleIterator() override;
  43   bool HasNext() const override;
  44   Rule Next() override;
  45 };
  46
  47 class ConcatenationIterator : public RuleIterator {
  48  public:
  49   // ConcatenationIterator takes ownership of the pointers in the |iterators|
  50   // list and |auto_lock|. |auto_lock| can be NULL if no locking is needed.
  51   ConcatenationIterator(ScopedVector<RuleIterator>* iterators,
  52                         base::AutoLock* auto_lock);
  53   ~ConcatenationIterator() override;
  54   bool HasNext() const override;
  55   Rule Next() override;
  56
  57  private:
  58   ScopedVector<RuleIterator> iterators_;
  59   scoped_ptr<base::AutoLock> auto_lock_;
  60 };
  61
  62 }  // namespace content_settings
  63
  64 #endif  // COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_CONTENT_SETTINGS_RULE_H_