Mono.TextEditor.TextEditorData.VisualToLogicalLine C# (CSharp) Method

		public int VisualToLogicalLine (int visualLineNumber)
		{
			return HeightTree.VisualToLogicalLine (visualLineNumber);
		}
		

        public static void Up(TextEditorData data)
        {
            using (var undo = data.OpenUndoGroup()) {
                int desiredColumn = data.Caret.DesiredColumn;

                //on Mac, when deselecting and moving up/down a line, column is always the column of the selection's start
                if (Platform.IsMac && data.IsSomethingSelected && !data.Caret.PreserveSelection)
                {
                    int col  = data.MainSelection.Anchor > data.MainSelection.Lead ? data.MainSelection.Lead.Column : data.MainSelection.Anchor.Column;
                    int line = data.MainSelection.MinLine - 1;
                    data.ClearSelection();
                    data.Caret.Location = (line >= DocumentLocation.MinLine) ? new DocumentLocation(line, col) : new DocumentLocation(DocumentLocation.MinLine, DocumentLocation.MinColumn);
                    data.Caret.SetToDesiredColumn(desiredColumn);
                    return;
                }

                if (data.Caret.Line > DocumentLocation.MinLine)
                {
                    int visualLine = data.LogicalToVisualLine(data.Caret.Line);
                    int line       = data.VisualToLogicalLine(visualLine - 1);
                    int offset     = MoveCaretOutOfFolding(data, data.Document.LocationToOffset(line, data.Caret.Column), false);
                    data.Caret.SetToOffsetWithDesiredColumn(offset);
                }
                else
                {
                    ToDocumentStart(data);
                }
            }
        }