1 // Copyright (c) 2012 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 #ifndef COMPONENTS_VISITEDLINK_BROWSER_VISITEDLINK_DELEGATE_H_ 6 #define COMPONENTS_VISITEDLINK_BROWSER_VISITEDLINK_DELEGATE_H_ 7 8 #include "base/memory/ref_counted.h" 9 10 class GURL; 11 12 namespace content { 13 class BrowserContext; 14 } 15 16 namespace visitedlink { 17 18 // Delegate class that clients of VisitedLinkMaster must implement. 19 class VisitedLinkDelegate { 20 public: 21 // See RebuildTable. 22 class URLEnumerator : public base::RefCountedThreadSafe<URLEnumerator> { 23 public: 24 // Call this with each URL to rebuild the table. 25 virtual void OnURL(const GURL& url) = 0; 26 27 // This must be called by Delegate after RebuildTable is called. |success| 28 // indicates all URLs have been returned successfully. The URLEnumerator 29 // object cannot be used by the delegate after this call. 30 virtual void OnComplete(bool success) = 0; 31 32 protected: ~URLEnumerator()33 virtual ~URLEnumerator() {} 34 35 private: 36 friend class base::RefCountedThreadSafe<URLEnumerator>; 37 }; 38 39 // Delegate class is responsible for persisting the list of visited URLs 40 // across browser runs. This is called by VisitedLinkMaster to repopulate 41 // its internal table. Note that methods on enumerator can be called on any 42 // thread but the delegate is responsible for synchronizating the calls. 43 virtual void RebuildTable(const scoped_refptr<URLEnumerator>& enumerator) = 0; 44 45 protected: ~VisitedLinkDelegate()46 virtual ~VisitedLinkDelegate() {} 47 }; 48 49 } // namespace visitedlink 50 51 #endif // COMPONENTS_VISITEDLINK_BROWSER_VISITEDLINK_DELEGATE_H_ 52