[Webkit-unassigned] [Bug 124789] New: Fire "change" event on TextTrackList when a TextTrack's mode changes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=124789

           Summary: Fire "change" event on TextTrackList when a
                    TextTrack's mode changes
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media Elements
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: b.long at cablelabs.com


TextTrackList has gained the same "change" event as AudioTrackList and VideoTrackList:

> Whenever a text track that is in a media element's list of text tracks has its text track mode change value, the user agent must run the following steps for the media element:
>
>    If the media element's pending text track change notification flag is set, abort these steps.
>
>    Set the media element's pending text track change notification flag.
>
>    Queue a task that runs the following substeps:
>
>        Unset the media element's pending text track change notification flag.
>
>        Fire a simple event named change at the media element's textTracks attribute's TextTrackList object.

http://www.w3.org/TR/html5/embedded-content-0.html#texttracklist

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