516811 - "load" events for poster image loads bubble out

Status: RESOLVED INACTIVE

(Core :: Audio/Video: Playback, defect)

Description

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Apparently if you have a video with a poster image, the "load" event for the anonymous image can be observed by content in the surrounding document.

Comment 1

[Chris Pearce [:cpearce (Not reading bugmail)]]

Note when we fix this, the poster reftests (well poster-7.html at least) will start hanging, as they rely on a load event being fired at their video element, and currently they're receiving the bubbling poster's load event. When we fix this they'll no longer receive the poster's bubbling load event, and so the tests will timeout. Beware!

Comment 2

[Chris Pearce [:cpearce (Not reading bugmail)]]

See bug 715469 comment 16 for a way to fix this.

Comment 3

[Chris Pearce [:cpearce (Not reading bugmail)]]

So if we do the trick to have a background-image display the poster image, the document "load" event is not delayed by the loading of the poster, which makes this really hard to reftest reliably.

So perhaps we so do what Olli suggests in bug 715469 comment 2 and have a ::PreHandleEvent() function on nsHTMLMediaElement to catch and suppress the poster's "load" event, and dispatch a "mozposterloaded" event instead, so our tests can use that instead.

Comment 4

[Chris Pearce [:cpearce (Not reading bugmail)]]

If someone gets to this before me, that's fine. :)

Comment 5

[Matthew Schranz [:mjschranz]]

Going to give it a try. Going to go over it sometime this week.

Comment 6

[Nils Ohlmeier [:drno]]

Mass closing do to inactivity.
Feel free to re-open if still needed.