On 12/7/06, Böhringer Jochen <[EMAIL PROTECTED]> wrote:
Hello,
how does PPR replace content in the dom of the page. I know that PPR uses an
IFrame. But how is the data loaded into the IFrame copied into the main page?
I guess it could be realized this way:
1.) Load new HTML markup into the IFrame.
2.) Copy the new markup in the Iframe to the main Frame using .innerHtml
Roughly speaking, yes, though it's a lot more complicated than that.
Am I right or is it done using another mechanism? If I'm right and I have a component whose
renderer generates markup containing <script>alert('Test');</script>
This scriptlet would first be executed after loaded into the iframe. And would
be executed a second time if the ppr mechanism has copied it into the main
frame. Is this correct?
No, it's actually more clever than that - as long as you write out the
script element using ResponseWriter.startElement. My memory's gotten
a little fuzy on the details - you may
also need to call writeAttribute("defer", Boolean.TRUE, null). But,
at any rate, the script
is blocked for execution in the iframe, then executed in the main page.
When I get the chance to rewrite the code to use XMLHttp instead of an iframe,
this gets a bit easier in some ways (a bit harder in others).
-- Adam
If yes, how can I generate a javascript in a renderer which is called after the
markup is copied into the mainframe and not in the iframe? Is there a special
trick I can use in a component using PPR capabilities? I would like to do it
the Trinidad way, because I would like to donate my DragAndDrop component (as
soon as it works) back to Trinidad.
Regards
Jochen
