[webkit-dev] Shadow nodes in webkit
giri.rao at gmail.com
Fri Oct 24 13:08:34 PDT 2008
Here is my html fragment:
<textarea rows="10" cols="30">The cat was playing in the
The dom tree consists of:
dom node for document
-- dom node for html
-- dom node for body
-- dom node for text area
The dom tree stops here and does not give me a #text node for the textarea's
text. Is there a way to get the text while traversing the dom tree?
The render tree consists of:
render object for document
-- render object for html
-- render object for body
-- render object for text area
-- A DIV shadow node
-- a #text node whose nodeValue() returns The cat was playing
in the garden.
I was wondering if there could ever be a scenario where the shadow DIV node
contains more than one child? In other words is it guaranteed that a shadow
node contains exactly one child?
Thanks in advance
On Thu, Oct 23, 2008 at 6:28 PM, Adele Peterson <adele at apple.com> wrote:
> 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:
> I am running into a bit of a problem, let me try and explain the best I
> 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.
> Giri _______________________________________________
> webkit-dev mailing list
> webkit-dev at lists.webkit.org
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