GitUI.CommandsDialogs.FormBrowse.FillFileTree C# (CSharp) Method

        private void FillFileTree()
        {
            if (CommitInfoTabControl.SelectedTab != TreeTabPage)
                return;

            if (_selectedRevisionUpdatedTargets.HasFlag(UpdateTargets.FileTree))
                return;

            _selectedRevisionUpdatedTargets |= UpdateTargets.FileTree;

            try
            {
                GitTree.SuspendLayout();
                // Save state only when there is selected node
                if (GitTree.SelectedNode != null)
                {
                    TreeNode node = GitTree.SelectedNode;
                    FileText.SaveCurrentScrollPos();
                    lastSelectedNodes.Clear();
                    while (node != null)
                    {
                        lastSelectedNodes.Push(node.Text);
                        node = node.Parent;
                    }
                }

                // Refresh tree
                GitTree.Nodes.Clear();
                //restore selected file and scroll position when new selection is done
                if (RevisionGrid.GetSelectedRevisions().Count > 0)
                {
                    LoadInTree(RevisionGrid.GetSelectedRevisions()[0].SubItems, GitTree.Nodes);
                    //GitTree.Sort();
                    TreeNode lastMatchedNode = null;
                    // Load state
                    var currenNodes = GitTree.Nodes;
                    TreeNode matchedNode = null;
                    while (lastSelectedNodes.Count > 0 && currenNodes != null)
                    {
                        var next = lastSelectedNodes.Pop();
                        foreach (TreeNode node in currenNodes)
                        {
                            if (node.Text != next && next.Length != 40)
                                continue;

                            node.Expand();
                            matchedNode = node;
                            break;
                        }
                        if (matchedNode == null)
                            currenNodes = null;
                        else
                        {
                            lastMatchedNode = matchedNode;
                            currenNodes = matchedNode.Nodes;
                        }
                    }
                    //if there is no exact match, don't restore scroll position
                    if (lastMatchedNode != matchedNode)
                        FileText.ResetCurrentScrollPos();
                    GitTree.SelectedNode = lastMatchedNode;
                }
                if (GitTree.SelectedNode == null)
                {
                    FileText.ViewText("", "");
                }
            }
            finally
            {
                GitTree.ResumeLayout();
            }
        }