[Trinidad] problem with tr:panelPopup containing an iframe

[Renzo Tomaselli <re...@tecnotp.it>]

Hi, in the context of displaying generic documents (images, pdf, etc.) I 
wanted to use a modal tr:panelPopup, containing an iframe to host actual 
document contents. Things such as:

<tr:panelPopup id="modal" position="centered" modal="true">
         <iframe src="#{bean.blob}" type="#{bean.type}" width="400" 
height="400 frameborder="0"/>
...

Actual document contents are provided by the common trick of catching a 
resource request (src) in a phase listener and feeding the proper data 
stream into the response.
Now the problem is that with this configuration, the iframe resource is 
requested twice on FF.
Besides any performance loss, there are bad side effects since I store 
the document into the sesssion during first rendering (in bean.blob), to 
be retrieved and removed later, when the iframe requests the resource by 
next request. The second request will not find it anymore.
But if the iframe is hosted by any other component on a normal page it 
is requested just once.
Any help is appreciated.

Re: [Trinidad] problem with tr:panelPopup containing an iframe

[Renzo Tomaselli <re...@tecnotp.it>]

The double request produced by FF is due to the DOM change in 
TrPanelPopup._calcPosition, where the popup is assigned to the enclosing 
form in spite of its current parent, usually a span.
It appears that in such case FF refreshes the contents of the 
popup-contained iframes/objects, requesting the server for the same 
blobs as it already requested while building the page.
IE doesn't do it.
If I comment out parent.appendChild(popup), this second request is not 
emitted.
Unfortunately this parent reassignement was performed in solving jira 
TRINIDAD-673.
For the moment I don't see any other workaround than cloning my own 
version of TrPanelPopup.

-- Renzo

Renzo Tomaselli wrote:
> Hi, in the context of displaying generic documents (images, pdf, etc.) 
> I wanted to use a modal tr:panelPopup, containing an iframe to host 
> actual document contents. Things such as:
>
> <tr:panelPopup id="modal" position="centered" modal="true">
>         <iframe src="#{bean.blob}" type="#{bean.type}" width="400" 
> height="400 frameborder="0"/>
> ...
>
> Actual document contents are provided by the common trick of catching 
> a resource request (src) in a phase listener and feeding the proper 
> data stream into the response.
> Now the problem is that with this configuration, the iframe resource 
> is requested twice on FF.
> Besides any performance loss, there are bad side effects since I store 
> the document into the sesssion during first rendering (in bean.blob), 
> to be retrieved and removed later, when the iframe requests the 
> resource by next request. The second request will not find it anymore.
> But if the iframe is hosted by any other component on a normal page it 
> is requested just once.
> Any help is appreciated.
>
>
>
>
>