Web page already open (in source format); just need to read that text, using Selenium

Web page already open (in source format); just need to read that text,
using Selenium

Let's say I have a tab already open in the browswer. Its URL is:
view-source:http://www.google.com/webhp?source=search_app
Now that it's already open and displayed, I just want to read the text
that's in the client window. (Get a context to the page, or obtain its
object (as opposed to creating a new browser object), or whatever. Then
just read the page.)
Is there any methodology in Selenium, Splinter that allows for that?
Thanks for any help.