chrome/browser/bookmarks/bookmark_model_observer.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_BOOKMARKS_BOOKMARK_MODEL_OBSERVER_H_
   6 #define CHROME_BROWSER_BOOKMARKS_BOOKMARK_MODEL_OBSERVER_H_
   7
   8 class BookmarkModel;
   9 class BookmarkNode;
  10
  11 // Observer for the BookmarkModel.
  12 class BookmarkModelObserver {
  13  public:
  14   // Invoked when the model has finished loading. |ids_reassigned| mirrors
  15   // that of BookmarkLoadDetails::ids_reassigned. See it for details.
  16   virtual void BookmarkModelLoaded(BookmarkModel* model,
  17                                    bool ids_reassigned) = 0;
  18
  19   // Invoked from the destructor of the BookmarkModel.
  20   virtual void BookmarkModelBeingDeleted(BookmarkModel* model) {}
  21
  22   // Invoked when a node has moved.
  23   virtual void BookmarkNodeMoved(BookmarkModel* model,
  24                                  const BookmarkNode* old_parent,
  25                                  int old_index,
  26                                  const BookmarkNode* new_parent,
  27                                  int new_index) = 0;
  28
  29   // Invoked when a node has been added.
  30   virtual void BookmarkNodeAdded(BookmarkModel* model,
  31                                  const BookmarkNode* parent,
  32                                  int index) = 0;
  33
  34   // Invoked before a node is removed.
  35   // |parent| the parent of the node that will be removed.
  36   // |old_index| the index of the node about to be removed in |parent|.
  37   // |node| is the node to be removed.
  38   virtual void OnWillRemoveBookmarks(BookmarkModel* model,
  39                                      const BookmarkNode* parent,
  40                                      int old_index,
  41                                      const BookmarkNode* node) {}
  42
  43   // Invoked when a node has been removed, the item may still be starred though.
  44   // |parent| the parent of the node that was removed.
  45   // |old_index| the index of the removed node in |parent| before it was
  46   // removed.
  47   // |node| is the node that was removed.
  48   virtual void BookmarkNodeRemoved(BookmarkModel* model,
  49                                    const BookmarkNode* parent,
  50                                    int old_index,
  51                                    const BookmarkNode* node) = 0;
  52
  53   // Invoked before the title or url of a node is changed.
  54   virtual void OnWillChangeBookmarkNode(BookmarkModel* model,
  55                                         const BookmarkNode* node) {}
  56
  57   // Invoked when the title or url of a node changes.
  58   virtual void BookmarkNodeChanged(BookmarkModel* model,
  59                                    const BookmarkNode* node) = 0;
  60
  61   // Invoked before the metainfo of a node is changed.
  62   virtual void OnWillChangeBookmarkMetaInfo(BookmarkModel* model,
  63                                             const BookmarkNode* node) {}
  64
  65   // Invoked when the metainfo on a node changes.
  66   virtual void BookmarkMetaInfoChanged(BookmarkModel* model,
  67                                        const BookmarkNode* node) {}
  68
  69   // Invoked when a favicon has been loaded or changed.
  70   virtual void BookmarkNodeFaviconChanged(BookmarkModel* model,
  71                                           const BookmarkNode* node) = 0;
  72
  73   // Invoked before the direct children of |node| have been reordered in some
  74   // way, such as sorted.
  75   virtual void OnWillReorderBookmarkNode(BookmarkModel* model,
  76                                          const BookmarkNode* node) {}
  77
  78   // Invoked when the children (just direct children, not descendants) of
  79   // |node| have been reordered in some way, such as sorted.
  80   virtual void BookmarkNodeChildrenReordered(BookmarkModel* model,
  81                                              const BookmarkNode* node) = 0;
  82
  83   // Invoked before an extensive set of model changes is about to begin.
  84   // This tells UI intensive observers to wait until the updates finish to
  85   // update themselves.
  86   // These methods should only be used for imports and sync.
  87   // Observers should still respond to BookmarkNodeRemoved immediately,
  88   // to avoid holding onto stale node pointers.
  89   virtual void ExtensiveBookmarkChangesBeginning(BookmarkModel* model) {}
  90
  91   // Invoked after an extensive set of model changes has ended.
  92   // This tells observers to update themselves if they were waiting for the
  93   // update to finish.
  94   virtual void ExtensiveBookmarkChangesEnded(BookmarkModel* model) {}
  95
  96   // Invoked before all non-permanent bookmark nodes are removed.
  97   virtual void OnWillRemoveAllBookmarks(BookmarkModel* model) {}
  98
  99   // Invoked when all non-permanent bookmark nodes have been removed.
 100   virtual void BookmarkAllNodesRemoved(BookmarkModel* model) = 0;
 101
 102  protected:
 103   virtual ~BookmarkModelObserver() {}
 104 };
 105
 106 #endif  // CHROME_BROWSER_BOOKMARKS_BOOKMARK_MODEL_OBSERVER_H_