protected virtual void NotifyTextChanged(
string text,
int caretPosition,
TextBoxChangeAction action)
{
this.OnTextChanged((EventArgs) new TextBoxChangedEventArgs(text, caretPosition, action));
}
protected virtual bool NotifyTextChanging(
int startPosition,
int length,
string oldText,
string newText,
TextBoxChangeAction action)
{
TextBoxChangingEventArgs changingEventArgs = new TextBoxChangingEventArgs(startPosition, length, oldText, newText, action);
this.OnTextChanging((TextChangingEventArgs)changingEventArgs);
return(!changingEventArgs.Cancel);
}
public TextBoxChangingEventArgs(
int startPosition,
int length,
string oldText,
string newText,
TextBoxChangeAction action)
: base(oldText, newText)
{
this.startPosition = startPosition;
this.length = length;
this.action = action;
}
public virtual void EndEditUpdate(
bool notify,
string newText,
int caretPosition,
TextBoxChangeAction action)
{
if (this.editingCount <= 0)
{
return;
}
--this.editingCount;
if (!notify)
{
return;
}
this.NotifyTextChanged(newText, caretPosition, action);
}
public bool Replace(TextPosition startPosition, TextPosition endPosition, string text)
{
TextPosition.Swap(ref startPosition, ref endPosition);
if (endPosition == (TextPosition)null && string.IsNullOrEmpty(text))
{
return(false);
}
TextBoxChangeAction action = TextBoxChangeAction.TextEdit;
int length = TextPosition.GetLength(startPosition, endPosition);
string textRange = this.GetTextRange(startPosition, endPosition);
if (textRange == text || !this.NotifyTextChanging((int)startPosition, length, textRange, text, action))
{
return(false);
}
int caretPosition = (int)startPosition + (string.IsNullOrEmpty(text) ? 0 : text.Length);
this.BeginEditUpdate();
this.ReplaceOverride(startPosition, endPosition, text);
this.InvalidateLayout();
this.Invalidate();
this.EndEditUpdate(true, text, caretPosition, action);
return(true);
}
public TextBoxChangedEventArgs(string text, int caretPosition, TextBoxChangeAction action)
{
this.text = text;
this.action = action;
this.caretPosition = caretPosition;
}
