Printing stuff in rails (literally to a printer)

Question

I'm wondering if there was any library or gem available in Rails for printing the contents of a web page, as in literally on to paper via a printer. I was also wondering if there was any way you can specify that only a specific part of the page (e.g. a div or something) would be printed? Any pointers, advice, or links to tutorials would be appreciated!

EDIT

so I've made a stab at creating a stylesheet which will create a print friendly view, let's call it "print.css":

div.transpose-keys, div#editSong, div#navigation, div#debug{
    display: none;
}

And I was wondering if there was any way I could apply it only when my application fires the print action? So that when the following is link is clicked the application applies the css above before it prints? Here's the link in my embedded ruby html:

<%= link_to "PRINT", '#', onclick: "printpage()" %>

And finally my javascript calling the print function:

function printpage()
  {
  window.print()
  }

Answer 1

If you add your print.css as follows

<link rel="stylesheet" type="text/css" media="print" href="print.css">

and use browser print dialog, it should automatically format the page according to the style in print.css

Answer 2

I got around my problem by using this simple solution:

print.css:

@media print {
  div.info, div#editStuff, div#navigation, div#debug {
    display: none;
  }
}

the @media tag ensures these are not displayed in the printed version

application.js:

function printpage()
{
   window.print()
}

show.html.erb:

<%= link_to "PRINT", '#', onclick: "printpage()" %>