Refactors some of the bookmark drag and drop code into a separate...

chrome/browser/bookmarks/bookmark_drag_utils.h

+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_BOOKMARKS_BOOKMARK_DRAG_UTILS_H_
+#define CHROME_BROWSER_BOOKMARKS_BOOKMARK_DRAG_UTILS_H_
+
+#include "chrome/browser/bookmarks/bookmark_drag_data.h"
+
+class BookmarkNode;
+class Profile;
+
+namespace views {
+class DropTargetEvent;
+}
+
+// Functions used in managing bookmark drag and drop. These functions are
+// used by both the bookmark bar and bookmark manager.
+namespace bookmark_drag_utils {
+
+// Calculates the drop operation given the event and supported set of
+// operations. This prefers the following ordering: COPY, LINK then MOVE.
+int PreferredDropOperation(const views::DropTargetEvent& event,
+                           int operation);
+
+// Returns true if the bookmark data can be dropped on |drop_parent| at
+// |index|. A drop from a separate profile is always allowed, where as
+// a drop from the same profile is only allowed if none of the nodes in
+// |data| are an ancestor of |drop_parent| and one of the nodes isn't already
+// a child of |drop_parent| at |index|.
+bool IsValidDropLocation(Profile* profile,
+                         const BookmarkDragData& data,
+                         BookmarkNode* drop_parent,
+                         int index);
+
+// Clones drag data, adding newly created nodes to |parent| starting at
+// |index_to_add_at|.
+void CloneDragData(BookmarkModel* model,
+                   const std::vector<BookmarkDragData::Element>& elements,
+                   BookmarkNode* parent,
+                   int index_to_add_at);
+
+}
+
+#endif  // CHROME_BROWSER_BOOKMARKS_BOOKMARK_DRAG_UTILS_H_