mozilla/pdf.js — pull request #1150 by arturadib (2012-01-31 21:23:56+00:00)
Title: Show animated loading icon if page rendering takes too long

Closes #997

As our viewer currently is, for image- or graphics-heavy pages the user might not know that there is some processing going on in the background.

This patch adds an animated loading icon at the center of the page when the page rendering takes longer than one second.