fix pasting issue

Author: huangjia2107

src/XamlTheme/Controls/TextEditorEx.cs

@@ -336,6 +336,8 @@ public override void OnApplyTemplate()
  _partTextEditor.TextArea.TextEntering += TextArea_TextEntering;
  _partTextEditor.TextArea.TextEntered += TextArea_TextEntered;
  _partTextEditor.TextArea.Caret.PositionChanged += Caret_PositionChanged;
+ DataObject.AddPastingHandler(_partTextEditor, _partTextEditor_Pasting);
+
 
  _partTextEditor.Options = new TextEditorOptions { ConvertTabsToSpaces = true };
  _partTextEditor.TextArea.SelectionCornerRadius = 0;
@@ -385,6 +387,12 @@ private void _partTextEditor_TextChanged(object sender, EventArgs e)
  }
  }
 
+ private void _partTextEditor_Pasting(object sender, DataObjectPastingEventArgs e)
+ {
+ //for invoke DelayArrivedEvent
+ _disabledTimer = false;
+ }
+
  private void Caret_PositionChanged(object sender, EventArgs e)
  {
  if (_partTextEditor == null)
@@ -979,6 +987,7 @@ private void UnsubscribeEvents()
  _partTextEditor.TextArea.TextEntering -= TextArea_TextEntering;
  _partTextEditor.TextArea.TextEntered -= TextArea_TextEntered;
  _partTextEditor.TextArea.Caret.PositionChanged -= Caret_PositionChanged;
+ DataObject.RemovePastingHandler(_partTextEditor, _partTextEditor_Pasting);
  }
  }