protected void OnDragDrop(object sender, DragEventArgs e)
{
if (e.Data.GetDataPresent(typeof(string)))
{
_textArea.BeginUpdate();
_textArea.Document.UndoStack.StartUndoGroup();
try
{
int offset = _textArea.Caret.Offset;
if (_textArea.IsReadOnly(offset))
{
// prevent dragging text into readonly section
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))
{
// prevent dragging text out of readonly section
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();
}
}
}
/// <summary>
/// Pastes the content of the clipboard into the document.
/// </summary>
public void Paste()
{
if (!_textArea.EnableCutOrPaste)
{
return;
}
// Clipboard.GetDataObject may throw an exception...
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.Selections[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.EnableCutOrPaste already checked readonly for this case
_textArea.InsertString(text);
}
}
finally
{
_textArea.Document.UndoStack.EndUndoGroup();
}
}
}
return;
}
catch (ExternalException)
{
// GetDataObject does not provide RetryTimes parameter
if (i > 5)
{
throw;
}
}
}
}
