chrome/browser/sync/glue/bookmark_change_processor.h

   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 CHROME_BROWSER_SYNC_GLUE_BOOKMARK_CHANGE_PROCESSOR_H_
   6 #define CHROME_BROWSER_SYNC_GLUE_BOOKMARK_CHANGE_PROCESSOR_H_
   7
   8 #include <vector>
   9
  10 #include "base/compiler_specific.h"
  11 #include "chrome/browser/sync/glue/bookmark_model_associator.h"
  12 #include "chrome/browser/sync/glue/sync_backend_host.h"
  13 #include "components/bookmarks/core/browser/bookmark_model_observer.h"
  14 #include "components/bookmarks/core/browser/bookmark_node.h"
  15 #include "components/sync_driver/change_processor.h"
  16 #include "components/sync_driver/data_type_error_handler.h"
  17
  18 class Profile;
  19
  20 namespace base {
  21 class RefCountedMemory;
  22 }
  23
  24 namespace syncer {
  25 class WriteNode;
  26 class WriteTransaction;
  27 }  // namespace syncer
  28
  29 namespace browser_sync {
  30
  31 // This class is responsible for taking changes from the BookmarkModel
  32 // and applying them to the sync API 'syncable' model, and vice versa.
  33 // All operations and use of this class are from the UI thread.
  34 // This is currently bookmarks specific.
  35 class BookmarkChangeProcessor : public BookmarkModelObserver,
  36                                 public ChangeProcessor {
  37  public:
  38   BookmarkChangeProcessor(Profile* profile,
  39                           BookmarkModelAssociator* model_associator,
  40                           DataTypeErrorHandler* error_handler);
  41   virtual ~BookmarkChangeProcessor();
  42
  43   // BookmarkModelObserver implementation.
  44   // BookmarkModel -> sync API model change application.
  45   virtual void BookmarkModelLoaded(BookmarkModel* model,
  46                                    bool ids_reassigned) OVERRIDE;
  47   virtual void BookmarkModelBeingDeleted(BookmarkModel* model) OVERRIDE;
  48   virtual void BookmarkNodeMoved(BookmarkModel* model,
  49                                  const BookmarkNode* old_parent,
  50                                  int old_index,
  51                                  const BookmarkNode* new_parent,
  52                                  int new_index) OVERRIDE;
  53   virtual void BookmarkNodeAdded(BookmarkModel* model,
  54                                  const BookmarkNode* parent,
  55                                  int index) OVERRIDE;
  56   virtual void BookmarkNodeRemoved(BookmarkModel* model,
  57                                    const BookmarkNode* parent,
  58                                    int index,
  59                                    const BookmarkNode* node,
  60                                    const std::set<GURL>& removed_urls) OVERRIDE;
  61   virtual void BookmarkAllNodesRemoved(
  62       BookmarkModel* model,
  63       const std::set<GURL>& removed_urls) OVERRIDE;
  64   virtual void BookmarkNodeChanged(BookmarkModel* model,
  65                                    const BookmarkNode* node) OVERRIDE;
  66   virtual void BookmarkMetaInfoChanged(BookmarkModel* model,
  67                                        const BookmarkNode* node) OVERRIDE;
  68   virtual void BookmarkNodeFaviconChanged(BookmarkModel* model,
  69                                           const BookmarkNode* node) OVERRIDE;
  70   virtual void BookmarkNodeChildrenReordered(BookmarkModel* model,
  71                                              const BookmarkNode* node) OVERRIDE;
  72
  73   // The change processor implementation, responsible for applying changes from
  74   // the sync model to the bookmarks model.
  75   virtual void ApplyChangesFromSyncModel(
  76       const syncer::BaseTransaction* trans,
  77       int64 model_version,
  78       const syncer::ImmutableChangeRecordList& changes) OVERRIDE;
  79
  80   // The following methods are static and hence may be invoked at any time, and
  81   // do not depend on having a running ChangeProcessor.
  82
  83   // Updates the title, URL, creation time and favicon of the bookmark |node|
  84   // with data taken from the |sync_node| sync node.
  85   static void UpdateBookmarkWithSyncData(
  86       const syncer::BaseNode& sync_node,
  87       BookmarkModel* model,
  88       const BookmarkNode* node,
  89       Profile* profile);
  90
  91   // Creates a bookmark node under the given parent node from the given sync
  92   // node. Returns the newly created node.  The created node is placed at the
  93   // specified index among the parent's children.
  94   static const BookmarkNode* CreateBookmarkNode(
  95       syncer::BaseNode* sync_node,
  96       const BookmarkNode* parent,
  97       BookmarkModel* model,
  98       Profile* profile,
  99       int index);
 100
 101   // Sets the favicon of the given bookmark node from the given sync node.
 102   // Returns whether the favicon was set in the bookmark node.
 103   // |profile| is the profile that contains the HistoryService and BookmarkModel
 104   // for the bookmark in question.
 105   static bool SetBookmarkFavicon(const syncer::BaseNode* sync_node,
 106                                  const BookmarkNode* bookmark_node,
 107                                  BookmarkModel* model,
 108                                  Profile* profile);
 109
 110   // Applies the 1x favicon |bitmap_data| and |icon_url| to |bookmark_node|.
 111   // |profile| is the profile that contains the HistoryService and BookmarkModel
 112   // for the bookmark in question.
 113   static void ApplyBookmarkFavicon(
 114       const BookmarkNode* bookmark_node,
 115       Profile* profile,
 116       const GURL& icon_url,
 117       const scoped_refptr<base::RefCountedMemory>& bitmap_data);
 118
 119   // Sets the favicon of the given sync node from the given bookmark node.
 120   static void SetSyncNodeFavicon(const BookmarkNode* bookmark_node,
 121                                  BookmarkModel* model,
 122                                  syncer::WriteNode* sync_node);
 123
 124   // Treat the |index|th child of |parent| as a newly added node, and create a
 125   // corresponding node in the sync domain using |trans|.  All properties
 126   // will be transferred to the new node.  A node corresponding to |parent|
 127   // must already exist and be associated for this call to succeed.  Returns
 128   // the ID of the just-created node, or if creation fails, kInvalidID.
 129   static int64 CreateSyncNode(const BookmarkNode* parent,
 130                               BookmarkModel* model,
 131                               int index,
 132                               syncer::WriteTransaction* trans,
 133                               BookmarkModelAssociator* associator,
 134                               DataTypeErrorHandler* error_handler);
 135
 136   // Update transaction version of |model| and |nodes| to |new_version| if
 137   // it's valid.
 138   static void UpdateTransactionVersion(
 139       int64 new_version,
 140       BookmarkModel* model,
 141       const std::vector<const BookmarkNode*>& nodes);
 142
 143  protected:
 144   virtual void StartImpl() OVERRIDE;
 145
 146  private:
 147   enum MoveOrCreate {
 148     MOVE,
 149     CREATE,
 150   };
 151
 152   // Retrieves the meta info from the given sync node.
 153   static scoped_ptr<BookmarkNode::MetaInfoMap> GetBookmarkMetaInfo(
 154       const syncer::BaseNode* sync_node);
 155
 156   // Sets the meta info of the given sync node from the given bookmark node.
 157   static void SetSyncNodeMetaInfo(const BookmarkNode* node,
 158                                   syncer::WriteNode* sync_node);
 159
 160   // Helper function used to fix the position of a sync node so that it matches
 161   // the position of a corresponding bookmark model node. |parent| and
 162   // |index| identify the bookmark model position.  |dst| is the node whose
 163   // position is to be fixed.  If |operation| is CREATE, treat |dst| as an
 164   // uncreated node and set its position via InitByCreation(); otherwise,
 165   // |dst| is treated as an existing node, and its position will be set via
 166   // SetPosition().  |trans| is the transaction to which |dst| belongs. Returns
 167   // false on failure.
 168   static bool PlaceSyncNode(MoveOrCreate operation,
 169                             const BookmarkNode* parent,
 170                             int index,
 171                             syncer::WriteTransaction* trans,
 172                             syncer::WriteNode* dst,
 173                             BookmarkModelAssociator* associator);
 174
 175   // Copy properties (but not position) from |src| to |dst|.
 176   static void UpdateSyncNodeProperties(const BookmarkNode* src,
 177                                        BookmarkModel* model,
 178                                        syncer::WriteNode* dst);
 179
 180   // Helper function to encode a bookmark's favicon into raw PNG data.
 181   static void EncodeFavicon(const BookmarkNode* src,
 182                             BookmarkModel* model,
 183                             scoped_refptr<base::RefCountedMemory>* dst);
 184
 185   // Remove |sync_node|. It should not have any children
 186   void RemoveOneSyncNode(syncer::WriteNode* sync_node);
 187
 188   // Remove all sync nodes, except the permanent nodes.
 189   void RemoveAllSyncNodes();
 190
 191   // Remove all children of the bookmark node with bookmark node id:
 192   // |topmost_node_id|.
 193   void RemoveAllChildNodes(syncer::WriteTransaction* trans,
 194                            const int64& topmost_node_id);
 195
 196   // Remove all the sync nodes associated with |node| and its children.
 197   void RemoveSyncNodeHierarchy(const BookmarkNode* node);
 198
 199   // The bookmark model we are processing changes from.  Non-NULL when
 200   // |running_| is true.
 201   BookmarkModel* bookmark_model_;
 202
 203   Profile* profile_;
 204
 205   // The two models should be associated according to this ModelAssociator.
 206   BookmarkModelAssociator* model_associator_;
 207
 208   DISALLOW_COPY_AND_ASSIGN(BookmarkChangeProcessor);
 209 };
 210
 211 }  // namespace browser_sync
 212
 213 #endif  // CHROME_BROWSER_SYNC_GLUE_BOOKMARK_CHANGE_PROCESSOR_H_