[webkit-dev] Shadow nodes in webkit

[Adele Peterson]

Hi Giri,

WebKit creates shadow nodes for many of the form controls.  As you  
noticed, these nodes are not visible from the DOM, but the renderers  
for those nodes can be traversed in the render tree.  For example, a  
text field or text area has a shadow DOM that contains all the text  
inside the control.  A file upload control has a shadow nodes for   
the  "choose file" button.  This is just a way for WebKit to build  
elements using HTML without exposing the internal details to web  
content.

- Adele

On Oct 23, 2008, at 6:22 PM, Giri Rao wrote:

> Hi,
>
> I am running into a bit of a problem, let me try and explain the  
> best I can:
>
> I am traversing RenderObject tree in webkit.  I notice that there  
> are certain nodes (accessed using render_object->node()) which are  
> shadow nodes (node->isShadow() returns true).  I note down the  
> address of one such node, lets say the address is 100.  The node  
> name of this node is "DIV"
>
> Now, I traverse the dom tree using Node, for each node I note down  
> the node's address. I am noticing that I am not seeing any nodes  
> while traversing the dom tree whose address is 100.
>
> So two questions:
> 1.  Why would webkit create a node which is not part of the dom tree?
> 2.  What are shadow nodes?
>
> Any insight is appreciated.
>
> Thanks
> Giri _______________________________________________
> webkit-dev mailing list
> webkit-dev at lists.webkit.org
> http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev

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