On Jun 16, 2011, at 8:53 AM, Darin Adler <da...@apple.com> wrote:
> On Jun 16, 2011, at 7:21 AM, song.7....@nokia.com wrote:
>
>> Could some share what’s the design consideration about the DOM tree and
>> Render tree separation?
>
> CSS styling makes it easy for almost any DOM node to render as almost
> anything. To give one trivial example, a paragraph element can be turned into
> a table cell with "display: table-cell" or removed from rendering entirely
> with "display: none". The main reason to have a separate render tree is that
> the structure and classes of the render tree nodes can reflect the
> post-style-computation decisions of what will actually be rendered, which can
> be quite a bit different from the structure of the document itself. The DOM
> tree nodes represent the document’s structure.
>
> -- Darin
On the topic of trees: I've used the canvas to swap out and use my own render
tree. The ARIA spec has attributed like aria-owns which in some manner, allow
one to set an accessibility tree that differs from the Dom tree.
-Charles
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