[Webkit-unassigned] [Bug 113676] New: [Shadow DOM] Update the order of event dispatching at AT_TARGET phases.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=113676

           Summary: [Shadow DOM] Update the order of event dispatching at
                    AT_TARGET phases.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Event Handling
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: hayato at chromium.org
                CC: webcomponents-bugzilla at chromium.org,
                    dfreedm at google.com
            Blocks: 59805


The discussion on the spec side here:
https://www.w3.org/Bugs/Public/show_bug.cgi?id=21404


Given the event path, from Node A (top-most) to Node G (target, inner-most), where C and D are shadow hosts and G is the target, 
an event dispatching order in the current WebKit implementaion is:
(T: AT_TARGET, C: CAPTURING, B: BUBBLING)


For bubbling events:

  A          1 (C)  11 (B)
  B          2 (C)  10 (B)
  C (SH)     3 (T) 
  D          4 (C)   9 (B)
  E (SH)     5 (T)
  F          6 (C)   8 (B)
  G (Target) 7 (T)  


For non-bubbling events:

  A          1 (C)
  B          2 (C)
  C (SH)     3 (T) 
  D          4 (C)
  E (SH)     5 (T)
  F          6 (C)
  G (Target) 7 (T) 



We should change the order as follows:

For bubbling events:

  A          1 (C)  11 (B)
  B          2 (C)  10 (B)
  C (SH)             9 (T) 
  D          3 (C)   8 (B)
  E (SH)             7 (T)
  F          4 (C)   6 (B)
  G (Target)         5 (T)  


For non-bubbling events:

  A          1 (C)
  B          2 (C)
  C (SH)            7 (T) 
  D          3 (C)
  E (SH)            6 (T)
  F          4 (C)
  G (Target)        5 (T)

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