protected void OnDragEnter(object sender, DragEventArgs e)
{
if (e.Data.GetDataPresent(typeof(string)))
{
e.Effect = TextAreaDragDropHandler.GetDragDropEffect(e);
}
}
protected void OnDragOver(object sender, DragEventArgs e)
{
if (!this.textArea.Focused)
{
this.textArea.Focus();
}
Point point = this.textArea.PointToClient(new Point(e.X, e.Y));
if (this.textArea.TextView.DrawingPosition.Contains(point.X, point.Y))
{
Point logicalPosition = this.textArea.TextView.GetLogicalPosition(point.X - this.textArea.TextView.DrawingPosition.X, point.Y - this.textArea.TextView.DrawingPosition.Y);
int y = Math.Min(this.textArea.Document.TotalNumberOfLines - 1, Math.Max(0, logicalPosition.Y));
this.textArea.Caret.Position = new Point(logicalPosition.X, y);
this.textArea.SetDesiredColumn();
if (!this.textArea.EnableCutOrPaste)
{
e.Effect = DragDropEffects.None;
return;
}
if (e.Data.GetDataPresent(typeof(string)))
{
e.Effect = TextAreaDragDropHandler.GetDragDropEffect(e);
}
}
}
protected void OnDragDrop(object sender, DragEventArgs e)
{
this.textArea.PointToClient(new Point(e.X, e.Y));
if (!this.textArea.EnableCutOrPaste)
{
return;
}
if (e.Data.GetDataPresent(typeof(string)))
{
bool flag = false;
this.textArea.BeginUpdate();
try
{
int num = this.textArea.Caret.Offset;
if (e.Data.GetDataPresent(typeof(DefaultSelection)))
{
ISelection selection = (ISelection)e.Data.GetData(typeof(DefaultSelection));
if (selection.ContainsPosition(this.textArea.Caret.Position))
{
return;
}
if (TextAreaDragDropHandler.GetDragDropEffect(e) == DragDropEffects.Move)
{
int length = selection.Length;
this.textArea.Document.Remove(selection.Offset, length);
if (selection.Offset < num)
{
num -= length;
}
}
flag = true;
}
this.textArea.SelectionManager.ClearSelection();
this.InsertString(num, (string)e.Data.GetData(typeof(string)));
if (flag)
{
this.textArea.Document.UndoStack.UndoLast(2);
}
this.textArea.Document.UpdateQueue.Clear();
this.textArea.Document.RequestUpdate(new TextAreaUpdate(TextAreaUpdateType.WholeTextArea));
}
finally
{
this.textArea.EndUpdate();
}
}
}