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      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 #ifndef CHROME_BROWSER_HISTORY_HISTORY_PUBLISHER_H_
      6 #define CHROME_BROWSER_HISTORY_HISTORY_PUBLISHER_H_
      7 #pragma once
      8 
      9 #include <vector>
     10 
     11 #include "base/basictypes.h"
     12 #include "base/string16.h"
     13 
     14 #if defined(OS_WIN)
     15 #include "base/win/scoped_comptr.h"
     16 #include "history_indexer.h"
     17 #endif
     18 
     19 class GURL;
     20 
     21 namespace base {
     22 class Time;
     23 }
     24 
     25 namespace history {
     26 
     27 class HistoryPublisher {
     28  public:
     29   HistoryPublisher();
     30   ~HistoryPublisher();
     31 
     32   // Must call this function to complete initialization. Returns true if we
     33   // need to publish data to any indexers registered with us. Returns false if
     34   // there are none registered. On false, no other function should be called.
     35   bool Init();
     36 
     37   void PublishPageThumbnail(const std::vector<unsigned char>& thumbnail,
     38                             const GURL& url, const base::Time& time) const;
     39   void PublishPageContent(const base::Time& time, const GURL& url,
     40                           const string16& title,
     41                           const string16& contents) const;
     42   void DeleteUserHistoryBetween(const base::Time& begin_time,
     43                                 const base::Time& end_time) const;
     44 
     45  private:
     46   struct PageData {
     47     const base::Time& time;
     48     const GURL& url;
     49     const char16* html;
     50     const char16* title;
     51     const char* thumbnail_format;
     52     const std::vector<unsigned char>* thumbnail;
     53   };
     54 
     55   void PublishDataToIndexers(const PageData& page_data) const;
     56 
     57 #if defined(OS_WIN)
     58   // Initializes the indexer_list_ with the list of indexers that registered
     59   // with us to index history. Returns true if there are any registered.
     60   bool ReadRegisteredIndexersFromRegistry();
     61 
     62   // Converts time represented by the Time class object to variant time in UTC.
     63   // Returns '0' if the time object is NULL.
     64   static double TimeToUTCVariantTime(const base::Time& time);
     65 
     66   typedef std::vector< base::win::ScopedComPtr<
     67       IChromeHistoryIndexer> > IndexerList;
     68 
     69   // The list of indexers registered to receive history data from us.
     70   IndexerList indexers_;
     71 
     72   // The Registry key under HKCU where the indexers need to register their
     73   // CLSID.
     74   static const wchar_t* const kRegKeyRegisteredIndexersInfo;
     75 #endif
     76 
     77   // The format of the thumbnail we pass to indexers.
     78   static const char* const kThumbnailImageFormat;
     79 
     80   DISALLOW_COPY_AND_ASSIGN(HistoryPublisher);
     81 };
     82 
     83 }  // namespace history
     84 
     85 #endif  // CHROME_BROWSER_HISTORY_HISTORY_PUBLISHER_H_
     86