How does the Google Docs PDF viewer work?

Question

I am curious to know how the Google Docs PDF viewer works? It\'s not a flash like scribd.com; it looks like pure HTML. Any idea how do they did it?

Sample link to vie

Answer 1

the whole thing is an image. text highlight overlay - thats easy to figure out. but when you press ctrl+c and it copies to the clipboard, that part has me totally stumped. because it's not possible to write to the clipboard using javascript in firefox, but this ctrl+c on the image works fine in firefox. http://www.google.com/support/forum/p/Google+Docs/thread?tid=67dcf21ef8579b4c&hl=en&fid=67dcf21ef8579b4c00047e4a2a9fcb12