[Webkit-unassigned] [Bug 115545] New: Relayout forcing full visible area paint on clicking on unactive area in http://en.wikipedia.org/wiki/United_States

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=115545

           Summary: Relayout forcing full visible area paint on clicking
                    on unactive area in
                    http://en.wikipedia.org/wiki/United_States
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jdapena at igalia.com


Preconditions:

This is reproducible with at least Chrome Versión 26.0.1410.43 and WebKit/Qt (based on webkit trunk r145346).

Steps to reproduce:
1. Open http://en.wikipedia.org/wiki/United_States
2. Scroll to the grey area after the list of languages, in the left panel
3. Click there

Expected outcome:

Nothing should be redrawn, as the click is not causing any change in the visible area.

Actual outcome:

A paint of ALL the visible area happens in Chrome. In WebKitQt all the tiles are invalidated and new tiles are created.

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