[Webkit-unassigned] [Bug 92793] New: [chromium] Add method to check if a document is visually empty

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=92793

           Summary: [chromium] Add method to check if a document is
                    visually empty
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit API
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: creis at chromium.org
                CC: eric at webkit.org, fishd at chromium.org, abarth at webkit.org


For http://crbug.com/9682, we would like to make it possible to show the pending URL in a newly opened tab, as long as the contents of the initial about:blank document have not been modified by another window.  In that case, a URL spoof is possible and the pending URL should not be shown.  This behavior would be consistent with Opera.

However, there's currently no way in the Chromium WebKit API to determine if an about:blank document has been visually modified or not.  (Bug 91766 investigated the didFirstVisuallyNonEmptyLayout() callback for this, but it turned out to not be appropriate.)  I can listen to didUpdateLayout for potential changes to the render tree, as long as there's a way to check if the WebDocument's render tree is visually empty.

I'll start by proposing a WebDocument::isRenderTreeEmpty() method, which simply ensures that the RenderBody node of the render tree is empty.  I'm not super familiar with the render tree, so suggestions to improve this are welcome.

-- 
Configure bugmail: https://bugs.webkit.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.