448927 - [IMM][TSF][XUL panel] IME candidate list is overlapped by topmost panel element

Status: NEW

(Core :: DOM: UI Events & Focus Handling, defect, P5)

Description

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

spun off from bug 433340.

Some Windows IMEs decide the window level of the candidate list window from current focused window level. However, the widget of <panel> element never has the actual focus. Therefore, some IMEs don't use topmost window level for the candidate list window.

I have no idea to fix this bug...

# The default IMEs of Win Vista always create the topmost window, so, they don't have this problem.

Comment 1

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

I think that we should warn that XUL app developers don't use topmost panel element for the container of text input fields in MDC.
http://developer.mozilla.org/en/docs/XUL:panel

Comment 2

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

Moving all open keyboard/IME handling bugs to DOM: UI Events & Focus Handling component.

Comment 3

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

We stopped supporting XUL addons so that all XUL <panel> elements under our control. Therefore, we do not need to fix this bug, but welcome to fix this if you have an idea.