| // 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 COMPONENTS_VISITEDLINK_BROWSER_VISITEDLINK_DELEGATE_H_ |
| #define COMPONENTS_VISITEDLINK_BROWSER_VISITEDLINK_DELEGATE_H_ |
| |
| #include "base/memory/ref_counted.h" |
| |
| class GURL; |
| |
| namespace visitedlink { |
| |
| // Delegate class that clients of VisitedLinkMaster must implement. |
| class VisitedLinkDelegate { |
| public: |
| // See RebuildTable. |
| class URLEnumerator : public base::RefCountedThreadSafe<URLEnumerator> { |
| public: |
| // Call this with each URL to rebuild the table. |
| virtual void OnURL(const GURL& url) = 0; |
| |
| // This must be called by Delegate after RebuildTable is called. |success| |
| // indicates all URLs have been returned successfully. The URLEnumerator |
| // object cannot be used by the delegate after this call. |
| virtual void OnComplete(bool success) = 0; |
| |
| protected: |
| virtual ~URLEnumerator() {} |
| |
| private: |
| friend class base::RefCountedThreadSafe<URLEnumerator>; |
| }; |
| |
| // Delegate class is responsible for persisting the list of visited URLs |
| // across browser runs. This is called by VisitedLinkMaster to repopulate |
| // its internal table. Note that methods on enumerator can be called on any |
| // thread but the delegate is responsible for synchronizating the calls. |
| virtual void RebuildTable(const scoped_refptr<URLEnumerator>& enumerator) = 0; |
| |
| protected: |
| virtual ~VisitedLinkDelegate() {} |
| }; |
| |
| } // namespace visitedlink |
| |
| #endif // COMPONENTS_VISITEDLINK_BROWSER_VISITEDLINK_DELEGATE_H_ |