1539349 - window.RTL_UI does not update when intl.l10n.pseudo is changed

Status: NEW

(Firefox :: Toolbars and Customization, defect, P3)

Description

[James Teh [:Jamie]]

Spun off bug 1538575 comment 6. Gijs wrote:

FTR, I think it's a bug that window.RTL_UI doesn't update (which we should probably file orthogonally from whatever else we end up doing here). This is because, AIUI, we're moving towards a world where users can switch locales at runtime (which will start being possible once we finish removing DTDs and their user-unfriendly failure mode (yellow screen of death)), so anything that doesn't update for this at runtime will end up being a bug.

STR (assuming an LTR locale):

1. Open the Browser Toolbox.
2. In the console, enter "window.RTL_UI". Observe that the value is "false".
3. Back in the browser window, set the pref intl.uidirection to 1. Observe that the UI (e.g. the toolbar) changes accordingly.
4. In the toolbox console, enter "window.RTL_UI".
   • Expected: true
   • Actual: false

Comment 1

[Dan Minor [:dminor]]

I'm removing the intl.uidirection pref in Bug 1676137.

Comment 2

[Itiel]

Morphing the bug to be about intl.l10n.pseudo, the same issue is reproducible with it.
(In step 3 in the STR above set intl.l10n.pseudo to bidi to reproduce)

Comment 3

[Zibi Braniecki [:zbraniecki][:gandalf]]

This does not belong to Platform. The RTL_UI is a variable set and maintained within customizeui in Firefox /browser/ components and needs to be adapted to listen to the events fired by the platform.

If there's anything needed of the platform to make this possible, please, file a separate bug and make it blocking this one.