Don't try to apply lineAlign before CSS has been applied

[foolip]

https://www.w3.org/Bugs/Public/show_bug.cgi?id=26056

[foolip]

Please take a look. As you can see I haven't done the actual work of making lineAlign work. If that's a blocker for merging this, then one of us has to spend the time figuring out how to do it. It involves taking the bounding box of all of the lines.

[silviapfeiffer]

Well, the "cue box" was supposed to be the bounding box, so this was supposed to deal with lineAlign.
You want to move this after point 10, right?
Wouldn't we also need to move point 7 after point 10 then?
I think the whole "Apply WebVTT Cue settings" might need a rewrite.

[foolip]

Now rebased.

This would have to go after "Apply the terms of the CSS specifications", yes. Something like step 12, which says things like "Decrease position by the width of the bounding box of the boxes in boxes."

Step 7 ("Determine the value of x-position or y-position for cue") is OK, because it doesn't do anything that depends on the layout, the "text track cue computed *" are computed from the VTTCue state alone.

[foolip]

Please take another look. I've made an attempt to apply lineAlign after the bounding box is known, but I'm not really sure this is how you wanted lineAlign to work.

[silviapfeiffer]

Yes, I think that's correct.