511987 - Fennec doesn't load Amazon Recent History div after scrolling

Status: VERIFIED FIXED

(Firefox for Android Graveyard :: Panning/Zooming, defect, P1)

Description

[mikecpchen]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 XPCOMViewer/0.9a
Build Identifier: 1.9.2a2pre

When accessing www.amazon.com, the bottom of the page "Your Recent History" was never rendered. The turning wheel continues to show that the rendering is in process.

Reproducible: Always

Steps to Reproduce:
1. Type www.amazon.com in URL
2. Scroll down to the bottom of the page
3. Look for "Your Recent History" iFrame.


Expected Results:  
The browser should fetch information and render the contents for Recent History from the web server.

Comment 1

[Aakash Desai [:aakashd]]

Confirmed on builds:

Mozilla/5.0 (X11; U; Linux armv6l; en-US; rv:1.9.3a1pre) Gecko/20090821
Fennec/1.0b3pre

and

Mozilla/5.0 (Macintosh; U; Intel Mac OSX 10.5; en-US; rv:1.9.2a2pre)
Gecko/20090808 Fennec/1.0b3pre

Comment 2

[Joel Maher ( :jmaher ) (UTC -8)]

should this be in 1.0?

Comment 3

[Ben Combee (:bcombee)]

There's no iframe involved.  This is a div that gets loaded based on a JQuery onReady handler.  I'm not sure what JS event isn't being thrown here -- I suspect it's something to do with this area being made visible to the user, since Amazon normally doesn't load this until it's scrolled to.

Comment 4

[Ben Combee (:bcombee)]

It looks like the Amazon JS code is installing a scroll handler.  On every scroll, it looks to see if the Recent History div is visible, and if it is, it starts the load of the content for this div.  Since we're not firing scroll events when panning the page, this code doesn't get run.

On the source for amazon.com, search for "var rhfShvlEventHandler".  This gets registered as a $(window).scroll handler in the code that gets run once JQuery has loaded.

Comment 5

[Brad Lassey [:blassey] (use needinfo?)]

why aren't we firing scroll events for content when panning?

Comment 6

[Ben Combee (:bcombee)]

Because scrolling the content would fire paint events that would invalidate all of the tiles, slowing down scrolling.  We tried this to get fixed position elements moving correctly, and it was quite slow.

Comment 7

[Tony Chung [:tchung]]

renominating this for blocking-fennec.  still repros on 20100510 nightly build

Comment 8

[Martijn Wargers (dead)]

Interesting effect: when you click a link on the amazon.com page, after you've scrolled down, and then go back, the recent history div gets loaded.
So apparently, by going back into history, a scroll event is fired somewhere.

Comment 9

[Mark Finkle (:mfinkle) (use needinfo?)]

seems fixed by bug 576192

Comment 10

[Aakash Desai [:aakashd]]

Yep, verified FIXED on build:

Mozilla/5.0 (Android; Linux armv71; rv:2.0b6pre) Gecko/20100916 Namoroka/4.0b7pre Fennec/2.0b1pre

I'm getting a lot of "Operation temporarily disabled due to low memory on Maemo. Will file that in a separate bug.