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| 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef CHROME_BROWSER_HISTORY_VISIT_TRACKER_H__ | 5 #ifndef CHROME_BROWSER_HISTORY_VISIT_TRACKER_H__ |
| 6 #define CHROME_BROWSER_HISTORY_VISIT_TRACKER_H__ | 6 #define CHROME_BROWSER_HISTORY_VISIT_TRACKER_H__ |
| 7 | 7 |
| 8 #include <map> | 8 #include <map> |
| 9 #include <vector> | 9 #include <vector> |
| 10 | 10 |
| 11 #include "base/basictypes.h" | 11 #include "base/basictypes.h" |
| 12 #include "chrome/browser/history/history_types.h" | 12 #include "chrome/browser/history/history_types.h" |
| 13 | 13 |
| 14 namespace history { | 14 namespace history { |
| 15 | 15 |
| 16 // Tracks history transitions between pages. The history backend uses this to | 16 // Tracks history transitions between pages. The history backend uses this to |
| 17 // link up page transitions to form a chain of page visits, and to set the | 17 // link up page transitions to form a chain of page visits, and to set the |
| 18 // transition type properly. | 18 // transition type properly. |
| 19 // | 19 // |
| 20 // This class is not thread safe. | 20 // This class is not thread safe. |
| 21 class VisitTracker { | 21 class VisitTracker { |
| 22 public: | 22 public: |
| 23 VisitTracker(); | 23 VisitTracker(); |
| 24 ~VisitTracker(); | 24 ~VisitTracker(); |
| 25 | 25 |
| 26 // Notifications ------------------------------------------------------------- | 26 // Notifications ------------------------------------------------------------- |
| 27 | 27 |
| 28 void AddVisit(const void* host, | 28 void AddVisit(ContextID context_id, |
| 29 int32 page_id, | 29 int32 page_id, |
| 30 const GURL& url, | 30 const GURL& url, |
| 31 VisitID visit_id); | 31 VisitID visit_id); |
| 32 | 32 |
| 33 // When a RenderProcessHost is destroyed, we want to clear out our saved | 33 // When a RenderProcessHost is destroyed, we want to clear out our saved |
| 34 // transitions/visit IDs for it. | 34 // transitions/visit IDs for it. |
| 35 void NotifyRenderProcessHostDestruction(const void* host); | 35 void ClearCachedDataForContextID(ContextID context_id); |
| 36 | 36 |
| 37 // Querying ------------------------------------------------------------------ | 37 // Querying ------------------------------------------------------------------ |
| 38 | 38 |
| 39 // Returns the visit ID for the transition given information about the visit | 39 // Returns the visit ID for the transition given information about the visit |
| 40 // supplied by the renderer. We will return 0 if there is no appropriate | 40 // supplied by the renderer. We will return 0 if there is no appropriate |
| 41 // referring visit. | 41 // referring visit. |
| 42 VisitID GetLastVisit(const void* host, int32 page_id, const GURL& url); | 42 VisitID GetLastVisit(ContextID context_id, int32 page_id, const GURL& url); |
| 43 | 43 |
| 44 private: | 44 private: |
| 45 struct Transition { | 45 struct Transition { |
| 46 GURL url; // URL that the event happened to. | 46 GURL url; // URL that the event happened to. |
| 47 int32 page_id; // ID generated by the render process host. | 47 int32 page_id; // ID generated by the render process host. |
| 48 VisitID visit_id; // Visit ID generated by history. | 48 VisitID visit_id; // Visit ID generated by history. |
| 49 }; | 49 }; |
| 50 typedef std::vector<Transition> TransitionList; | 50 typedef std::vector<Transition> TransitionList; |
| 51 typedef std::map<const void*, TransitionList*> HostList; | 51 typedef std::map<ContextID, TransitionList*> ContextList; |
| 52 | 52 |
| 53 // Expires oldish items in the given transition list. This keeps the list | 53 // Expires oldish items in the given transition list. This keeps the list |
| 54 // size small by removing items that are unlikely to be needed, which is | 54 // size small by removing items that are unlikely to be needed, which is |
| 55 // important for GetReferrer which does brute-force searches of this list. | 55 // important for GetReferrer which does brute-force searches of this list. |
| 56 void CleanupTransitionList(TransitionList* transitions); | 56 void CleanupTransitionList(TransitionList* transitions); |
| 57 | 57 |
| 58 // Maps render view hosts to lists of recent transitions. | 58 // Maps render view hosts to lists of recent transitions. |
| 59 HostList hosts_; | 59 ContextList contexts_; |
| 60 | 60 |
| 61 DISALLOW_COPY_AND_ASSIGN(VisitTracker); | 61 DISALLOW_COPY_AND_ASSIGN(VisitTracker); |
| 62 }; | 62 }; |
| 63 | 63 |
| 64 } // namespace history | 64 } // namespace history |
| 65 | 65 |
| 66 #endif // CHROME_BROWSER_HISTORY_VISIT_TRACKER_H__ | 66 #endif // CHROME_BROWSER_HISTORY_VISIT_TRACKER_H__ |
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