[Webkit-unassigned] [Bug 127134] New: In-band text track cue duplicate detection should use the cue's original content, not its current content

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=127134

           Summary: In-band text track cue duplicate detection should use
                    the cue's original content, not its current content
           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


While discussing our duplicate detection behavior for in-band cues on the HTML mailing list, this came up:

> Ok. So existing WebKit behavior will add the cue again if the application
> modified it. That is likely to be surprising to the application developer.
> We definitely need clarification on what the proper behavior should be in
> the spec.

I think the way we should handle this is by comparing cues with the original cue content, not the current cue content, so if we seek backwards and see a cue that already exists, but has been modified, we ignore that cue and just keep the modified one.

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