[Webkit-unassigned] [Bug 165167] New: Web Inspector: Should be able to focus on an individual Object in Heap Snapshot DataGrid Trees

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=165167

            Bug ID: 165167
           Summary: Web Inspector: Should be able to focus on an
                    individual Object in Heap Snapshot DataGrid Trees
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: joepeck at webkit.org
                CC: bburg at apple.com, ggaren at apple.com, joepeck at webkit.org,
                    mattbaker at apple.com, nvasilyev at apple.com,
                    timothy at apple.com, webkit-bug-importer at group.apple.com

Summary:
Should be able to focus on an individual Object in Heap Snapshot DataGrid Trees

We already allow focusing in on an individual node in Script Profiles, we should do the same for an individual node in Heap Profiles.

Steps to Reproduce:
1. Inspect this page
2. Take a Heap Snapshot
3. Explore the Object Graph and find an object you are interested in
  => Want to focus on that particular object (e.g. Right Click + "Focus Node")

Notes:
- You could imagine the Navigation bar changing to:

    [-] Snapshot List > [S] Snapshot # > [|] Object Graph > [@] Function @1234

With the top level just having the one Function expanded with all its properties.

- Focusing nodes in the ProfileDataGridTree has a lot of complexity. Focussing generally resets the total for calculating percentages for everything beneath it. It would be great to abstract this to a general DataGridTree concept and share the code for focusing between both of these DataGridTrees.

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