     private var clipAndEnableScrollingChanged:Boolean = false;
 
     /**
-     *  @copy mx.layout.LayoutBase#clipAndEnableScrolling
+     *  @copy spark.core.IViewport#clipAndEnableScrolling
+     *
+     *  @default false
      *  
      *  @langversion 3.0
      *  @playerversion Flash 10


    /**
     *  A flag indicating whether the user is allowed
	 *  to edit the text in this control.
	 *
	 *  <p>If <code>true</code>, the mouse cursor will change to an i-beam
     *  when over the bounds of this control.
     *  If <code>false</code>, the mouse cursor will remain an arrow.</p>
     *
     *  <p>If this property is <code>true</code>,
	 *  the <code>selectable</code> property is ignored.</p>
     *
     *  @default true
     *

    
    /**
     *  The default height of the control, measured in lines.
     *
     *  <p>The control's formatting styles, such as <code>fontSize</code>
     *  and <code>lineHeight</code>, are used to calculate the line height
     *  in pixels.</p>
     *
     *  <p>You would, for example, set this property to 5 if you want
     *  the height of the RichEditableText to be sufficient
     *  to display five lines of text.</p>
     *
     *  <p>If this property is <code>NaN</code> (the default),
     *  then the component's default height will be determined
     *  from the text to be displayed.</p>
     *  
     *  <p>This property will be ignored if you specify an explicit height,
     *  a percent height, or both <code>top</code> and <code>bottom</code>
     *  constraints.</p>
     *
     *  <p>RichEditableText's <code>measure()</code> method uses
     *  <code>widthInChars</code> and <code>heightInLines</code>
     *  to determine the <code>measuredWidth</code>
     *  and <code>measuredHeight</code>. 
     *  These are similar to the <code>cols</code> and <code>rows</code>
     *  of an HTML TextArea.</p>
     *
     *  <p>Since both <code>widthInChars</code> and <code>heightInLines</code>
     *  default to <code>NaN</code>, RichTextEditable "autosizes" by default:
     *  it starts out very small if it has no text, grows in width as you
     *  type, and grows in height when you press Enter to start a new line.</p>
     *
     *  @default NaN
     *
     *  @see spark.components.RichEditableText#widthInChars
     *  
     *  @langversion 3.0
     *  @playerversion Flash 10
