protected void OnDragDrop(object sender, DragEventArgs e)
{
Point p = textArea.PointToClient(new Point(e.X, e.Y));
if (e.Data.GetDataPresent(typeof(string)))
{
textArea.BeginUpdate();
textArea.Document.UndoStack.StartUndoGroup();
try {
int offset = textArea.Caret.Offset;
if (textArea.IsReadOnly(offset))
{
return;
}
if (e.Data.GetDataPresent(typeof(DefaultSelection)))
{
ISelection sel = (ISelection)e.Data.GetData(typeof(DefaultSelection));
if (sel.ContainsPosition(textArea.Caret.Position))
{
return;
}
if (GetDragDropEffect(e) == DragDropEffects.Move)
{
if (SelectionManager.SelectionIsReadOnly(textArea.Document, sel))
{
return;
}
int len = sel.Length;
textArea.Document.Remove(sel.Offset, len);
if (sel.Offset < offset)
{
offset -= len;
}
}
}
textArea.SelectionManager.ClearSelection();
InsertString(offset, (string)e.Data.GetData(typeof(string)));
textArea.Document.RequestUpdate(new TextAreaUpdate(TextAreaUpdateType.WholeTextArea));
} finally {
textArea.Document.UndoStack.EndUndoGroup();
textArea.EndUpdate();
}
}
}
public void Paste(object sender, EventArgs e)
{
if (!textArea.EnableCutOrPaste)
{
return;
}
for (int i = 0;; i++)
{
try {
IDataObject data = Clipboard.GetDataObject();
if (data == null)
{
return;
}
bool fullLine = data.GetDataPresent(LineSelectedType);
if (data.GetDataPresent(DataFormats.UnicodeText))
{
string text = (string)data.GetData(DataFormats.UnicodeText);
if (text.Length > 0)
{
textArea.Document.UndoStack.StartUndoGroup();
try {
if (textArea.SelectionManager.HasSomethingSelected)
{
textArea.Caret.Position = textArea.SelectionManager.SelectionCollection[0].StartPosition;
textArea.SelectionManager.RemoveSelectedText();
}
if (fullLine)
{
int col = textArea.Caret.Column;
textArea.Caret.Column = 0;
if (!textArea.IsReadOnly(textArea.Caret.Offset))
{
textArea.InsertString(text);
}
textArea.Caret.Column = col;
}
else
{
textArea.InsertString(text);
}
} finally {
textArea.Document.UndoStack.EndUndoGroup();
}
}
}
return;
} catch (ExternalException) {
if (i > 5)
{
throw;
}
}
}
}