When the lightbox is opened, or prev/next pressed, preloads the
previous/next N images.
Technical debt introduced:
* initialization is a mess, with the viewer and the interface
randomly setting properties on each other in different phases of
execution. That got in the way and I shuffled things around
until they worked, which is obviously not the way to have a
robust system, but hopefully it will get scrapped soon anyway
in favor of a clean top-down dependency injection.
Change-Id: Idcb5c40de1ac0b3e482decd66e56c4de8ec71b6b
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/155
This is a big change, but should change nothing except the sizes of some
files and where they all are.
There are no more ext.multimediaViewer strings ANYWHERE, so let's keep
it that way. :)
Change-Id: Ic0892f5894700938bfa01f3f9bc8e5ab8276eb72
Also fixes a bug where we didn't clear our arrow key listeners, and VE
would sometimes see lightbox loads accidentally.
+tests for .empty()
Bug: 58107
Change-Id: Ica8326891b2da1f94966dbe72c28e878934ca64f
Third try, merged latest changes and added a test.
Run loading test against a wikipedia.org image.
Change-Id: I4e5a137e0f6dbedc45ec2c8393590919e23a26be
