waiting for somebody's page to load

Sergei Riaguzov

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Jul 26, 2008, 9:09:11 AM7/26/08

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Hi.

How can I wait for a page to load in XUL application?

I have two windows, pressing a button in one of them opens some page
in another window.

anotherWindow.location.href = "http://somewhere/something";

I've searched through google and found several ways to wait until this
page is loaded:

anotherWindow.onload = ...
anotherWindow.addActionListener('load', ...)
anotherWindow.document.addActionListener('load', ...)
anotherWindow.document.getElementById('appcontent').addActionListener('DOMContentLoaded'), ...)

but non of those worked. I think it is because when I do:

anotherWindow.location.href = ...

the page is loaded into anotherWindow which discards all my javascript
action listeners.

How can this be solved? Maybe it is possible to load a page in a
"blocking way", something like:

anotherWindow.loadBlocking('http://somewhere/something')

?

The example xullap is here:

http://brylant.iit.pwr.wroc.pl/~srahuzau/xulapp.zip

After unpacking:

xulrunner application.ini

or if it is Firefox3

firefox -app application.ini

After pressing Load http://www.google.com is loaded into another
window. How can I wait until it is fully loaded or at least check
whether it is fully loaded?

Sergey Yanovich

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Jul 26, 2008, 9:53:46 AM7/26/08

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Sergei Riaguzov wrote:
> How can I wait for a page to load in XUL application?

I am using nsIWebProgress interface to wait for loading.

Implementation may look like this:

const listener = {
/* nsIWebProgressListener implementaion */
QueryInterface: function(iid){
/* provide nsIWebProgressListener interface */
},

onStateChange: function(aWebProgress, aRequest, aStateFlags, aStatus) {
/* check for (aStateFlags & Ci.nsIWebProgressListener.STATE_STOP) */
};

anotherWindow.getInterface(Ci.nsIWebNavigation)
.QueryInterface(Ci.nsIWebProgress)
.addProgressListener(listener, Ci.nsIWebProgress.NOTIFY_STATE_WINDOW);

Sergei Riaguzov

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Jul 26, 2008, 12:08:59 PM7/26/08

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On Jul 26, 3:53 pm, Sergey Yanovich <ynv...@gmail.com> wrote:

> > How can I wait for a page to load in XUL application?
> I am using nsIWebProgress interface to wait for loading.
> Implementation may look like this:

[skip]
Thanks.. Can all this stuff be done in Javascript or those interfaces
are not available there?

Sergei Riaguzov

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Jul 26, 2008, 12:19:50 PM7/26/08

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On Jul 26, 6:08 pm, Sergei Riaguzov <riagu...@gmail.com> wrote:

> > > How can I wait for a page to load in XUL application?
> > I am using nsIWebProgress interface to wait for loading.
> > Implementation may look like this:
>
> [skip]
> Thanks.. Can all this stuff be done in Javascript or those interfaces
> are not available there?

Gee.. This IS Javascript, I'm so stupid. ;)

Sergei Riaguzov

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Jul 26, 2008, 3:14:58 PM7/26/08

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On Jul 26, 3:53 pm, Sergey Yanovich <ynv...@gmail.com> wrote:

> anotherWindow.getInterface(Ci.nsIWebNavigation)
> .QueryInterface(Ci.nsIWebProgress)
> .addProgressListener(listener, Ci.nsIWebProgress.NOTIFY_STATE_WINDOW);
OK, it worked.. Although it's not that simple. I will post my working
solution here if anybody will search for something similar. The code
you provided doesn't work if anotherWindow is just a XUL <window>. I
had to do something like that:

=== Cut ===
<?xml version="1.0"?>
<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>

<browser id="browser-content" type="content-primary"
src="about:blank" flex="1"/>
</window>
=== Cut ===

Now, having this window with a browser embedded I can do:

const nsIWebNavigation = Components.interfaces.nsIWebNavigation;
const nsIWebProgress = Components.interfaces.nsIWebProgress;
const nsIWebProgressListener =
Components.interfaces.nsIWebProgressListener;
const nsISupportsWeakReference =
Components.interfaces.nsISupportsWeakReference;

var myBrowser = anotherWindow.document.getElementById("browser-
content");
var wp = myBrowser.webNavigation.QueryInterface(nsIWebProgress);
wp.addProgressListener(listener, nsIWebProgress.NOTIFY_STATE_WINDOW);

// Now when I loadURI like:

myBrowser.webNavigation.loadURI("http://www.google.com",
nsIWebNavigation.LOAD_FLAGS_NONE, null, null, null);

Assuming my listener is:

I do achieve what I need: alert is shown.