Get the size of the window in Shiny : <p>I Would like to determine the size of the browser window in Shiny to help me layout my plot divs better.  Specifically I would like to determine the aspect ratio of the window to see how many divs I should spread across the screen and it still look nice.  My initial thought would be that the number of plots would be <code>floor(width/(height-navbar_height))</code>.  </p>

<p>I did some looking for this and I am currently unable to locate a possible solution and am currently lead to believe that this feature is simply not present in the clientData structure.  Any thoughts?</p>
