andy.kmc Reporter
	Description • 9 years ago

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36

Steps to reproduce:

1. Resize browser viewport to less than 550px (a height in which the image map in the following link goes off the screen when page first load)
2. Goto www.w3.org/WAI/UA/TS/html401/cp0102/0102-ONFOCUS-ONBLUR-MAP-AREA.html
3. Try Tab to focus on links


Actual results:

The focus got stuck on "Provision 2" link


Expected results:

All the links and image map links can be tab focused from top to the bottom of the page.

	Loic
	Comment 1 • 9 years ago

Not very critical, the bug exists in FF8, so it's old.

	Marco Zehe (:MarcoZ)
	Comment 2 • 9 years ago

I can definitely confirm this bug. Forward tabbing gets stuck on "Provision 2", backwards tabbing gets stuck on the "HTML 4.01 specification" link. I don't even have to resize or do anything with my Firefox window, I just tab through.

Neal, is this a possible late fall-out find from the focus management rewrite in bug 178324, or something completely different?

	Neil Deakin
	Comment 3 • 9 years ago

That this depends on the imagemap having never being visible, this is probably related to the unusual frame handling of image maps (bug 135040).

	Neil Deakin
	Comment 4 • 9 years ago

In fact, I think I remember this bug from long ago. I think we just need to ensure that the imagemap gets initialized (by calling nsImageFrame::GetImageMap) within nsFocusManager::GetNextTabbableMapArea.