[Webkit-unassigned] [Bug 81786] Support fixed position elements in Qt WebKit2

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=81786





--- Comment #11 from Sam Weinig <sam at webkit.org>  2012-03-21 13:37:27 PST ---
(In reply to comment #10)
> (In reply to comment #9)
> > (In reply to comment #7)
> > > (From update of attachment 133058 [details] [details] [details])
> > > View in context: https://bugs.webkit.org/attachment.cgi?id=133058&action=review
> > > 
> > > >>> Source/WebCore/platform/graphics/GraphicsLayer.h:421
> > > >>> +    bool fixedPosition() const { return m_fixedPosition; }
> > > >> 
> > > >> setUseFixedPosition? setIsFixedPositioned() ?
> > > > 
> > > > setUseFixedPosition() sound good to me :)
> > > 
> > > GraphicsLayer should not know about any CSS concepts like fixed position. This does not belong here.
> > 
> > Any other suggestion on how the same effect could be achieved? Or is this just a semantic issue.
> 
> It's not semantic. We don't want GraphicsLayer becoming a RenderLayer look-alike. GraphicsLayer is about backing stores, not what you do with them. 
> 
> You should communicate the information about which layers have special scrolling behavior via some other mechanism.

It is the long term goal for the ScrollingCoordinator and ScrollingTree to contain this information.

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