Getting the HTML when in source view

Hello everyone

How can I get the HTML when the editor is in source view?
Currently I have an external function that gets the HTML via the following code:

function getInnerHTML()
{
   var oEditor = FCKeditorAPI.GetInstance('FCKeditor1') ;
   return oEditor.EditorDocument.body.innerHTML;
}

However, if this function is run when the editor is in source mode it produces the following error:

'EditorDocument.body' is null or not an object

Is there a way to get the source HTML when in source mode?
And is there a way to first work out which mode the editor is currently in?