202154 - caret mode: caret can appear within html listboxes

Status: NEW

(Core :: DOM: UI Events & Focus Handling, defect)

Description

[sairuh (rarely reading bugmail)]

while in caret mode, i noticed that sometimes you can get the caret to appear
*within* an html form control, such as a listbox.

1. go to http://bugzilla.mozilla.org/query.cgi
2. turn on caret browsing mode: hit the F7 key and click the Yes button.
3. click just outside (to the right of) a listbox in that page, such as OS or
Target listboxes.

results: rather than appearing just outside of the listbox (or, not at all), the
caret appears within the listbox.

for comparison, i opened the same page in composer, but wasn't able to reproduce
this: if i clicked outside a listbox, i ended up selecting the table containing
the form control. if i clicked inside a listbox, the entire listbox (including
its contents) was selected. in either case, the caret didn't appear.

[p.s. to turn off caret mode, just hit F7 again.]

Comment 1

[Boris Zbarsky [:bzbarsky]]

> for comparison, i opened the same page in composer, but wasn't able to reproduce
> this

Composer has some CSS in editorOverride.css explicitly for this purpose, iirc.

Comment 2

[Aaron Leventhal]

I can't figure out what bz is talking about on in comment #1.

Comment 3

[Ginn Chen]

something like 241160.
Should caret get into form controls?
Now it's getting into textbox and listbox but not into checkbox or dropdown 
list.

Comment 4

[David Bolter [:davidb] (NeedInfo me for attention)]

Mass un-assigning bugs assigned to Aaron.