618046 - No focus change event when Shift+Tab at top of screen

Status: VERIFIED FIXED

(Core :: Disability Access APIs, defect)

Description

[Frank DiPalermo]

User-Agent:       Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; Tablet PC 2.0; MALC)
Build Identifier: Firefox 3.6.12

Open any web page.  Use Shift+Tab repeatedly until focus is on top most item in the page.  Press Shift+Tab again and note that no FocusChanged event is fired.  Therefore, screen readers do not know that focus has moved to the document.

Reproducible: Always

Comment 1

[Marco Zehe (:MarcoZ)]

This is confirmed with NVDA, too.

Comment 2

[alexander :surkov (:asurkov)]

Is it regression? How bad is this bug from user experience point?

Comment 3

[Frank DiPalermo]

From Frank on 12/10/2010:
Yes, it is a regression.  It does not fail in FF 3.5.11.
I expect it is not a great huge deal for screen reader user, but it is confusing.

Comment 5

[James Teh [:Jamie]]

As noted in bug 644455, this also occurs when shift+tabbing to the top of an iframe document.

Comment 6

[alexander :surkov (:asurkov)]

Enn, do I understand right that DOM focus event is not fired for DOM document in this case because it's considered that DOM document focus state wasn't changed (it had focus when its child element was focused and it has focus when it's focused)? If this is correct then how would I catch this case to fire a11y focus event (in sense what events could I listen or what algorithm could be)?

Comment 7

[Neil Deakin]

That's correct. The document is still focused, but the content that was focused received a blur event, which you can listen for.

Comment 9

[James Teh [:Jamie]]

I verified that this is fixed in the last try build for bug 673958.

Comment 10

[alexander :surkov (:asurkov)]

fixed by bug 673958

Comment 11

[Marco Zehe (:MarcoZ)]

Verified fixed in Mozilla/5.0 (Windows NT 6.1; WOW64; rv:10.0a1) Gecko/20110929 Firefox/10.0a1