[Webkit-unassigned] [Bug 142315] New: Web Inspector: up/down key navigation of timeline sidebar tree elements is broken when scope bar filters are applied

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=142315

            Bug ID: 142315
           Summary: Web Inspector: up/down key navigation of timeline
                    sidebar tree elements is broken when scope bar filters
                    are applied
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: burg at cs.washington.edu
                CC: graouts at webkit.org, joepeck at webkit.org,
                    jonowells at apple.com, mattbaker at apple.com,
                    nvasilyev at apple.com, timothy at apple.com,
                    webkit-bug-importer at group.apple.com

Steps to reproduce:

1. Populate some timelines data
2. Select the Layout timeline
3. Select a scope bar filter for a record type that is non-contiguous (usually, Styles Invalidated and Styles Recalculated are fine)
4. Click on a record tree element in sidebar
5. Keyboard up/down until it stops working (beeps)

>From my quick experiments, it appears that the sidebar content tree outline is rendered using the filtered tree elements, but pressing up/down keys tries to navigate to the next/previous unfiltered data grid node. If that node is filtered out, then nothing happens in response to key event (seems to eventually fire [NSResponder:noResponderFor] and beep.)

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