On Mac OS X, resizers (e.g. on a textarea) get an appropriate "mirrored" rendering when the direction is RTL. However, on Linux the resizer simply doesn't render at all in the RTL case. Once vertical-text support is enabled, this will also affect elements with writing-mode:vertical-rl (the typical mode for vertical East Asian content).

WFM with Clearlooks. ISTR a reftest failing in the same way for a theme bug when we switched from Fedora to Ubuntu.

(In reply to Karl Tomlinson (:karlt) from comment #1) > WFM with Clearlooks. Interesting; so apparently it may be dependent on the theme or whatever. > ISTR a reftest failing in the same way for a theme bug when we switched from > Fedora to Ubuntu. I see the bug on my Ubuntu 12.04LTS VM (with whatever the default theme is), after first noticing it on a tryserver run of a new testcase. Sure enough, there are some tests in the "RTL mirroring tests" section of layout/reftests/native-theme/reftest.list that are marked skip-if(gtk2Widget). (The mention of bug 581086 in the comments there appears to relate to Windows, rather than the gtk2 failure here.) Tracking back from those skip-if annotations, it looks like this was bug 519152, which was resolved as "invalid" in 2009. I'm inclined to think we should reconsider that resolution. Note that this will soon affect vertical Chinese/Japanese content as well as bidi cases (Arabic/Hebrew).

Yes, I think this is the same bug as bug 519152. I was thinking of bug 834724 and wasn't aware of bug 519152. I wonder whether people using RTL will avoid Ambience. If not, I guess a workaround could be added to disable native resizers when Ambience is the theme. I don't know whether it is worth it. Effort is probably better spent filing a bug for Ambience or its engine "murrine".

Karl, Which distribution are you using? And which version of Clearlooks-phenix theme are you using? I ask because the Clearlooks-phenix theme is available (and it has 3 versions!) for several distributions and, in some distributions, I do not see the resizing grippy at the corner of blocks eg: http://community.linuxmint.com/img/screenshots/clearlooks-phenix-theme.png Anyway, I can't find Clearlooks-phenix theme for my distribution or my desktop environment; I'm using Kubuntu 14.04.3 LTS and KDE 4.13.3. - - - - - This bug also affect blocks (not just <textarea>) with 'resize: both' and not just with 'direction: rtl': http://www.gtalbot.org/BrowserBugsSection/CSS3WritingModes/s31-resize-ui-vrl-002.xht http://www.gtalbot.org/BrowserBugsSection/CSS3WritingModes/s31-resize-ui-vlr-003.xht I'm using Firefox 43.0a1 buildID=20150815090753 With Chrome 44.0.2403.155, I see the resizing grippy albeit it is at the wrong position in s31-resize-ui-vrl-002 . Gérard

I think I found where to get that Clearlooks-phenix theme on my system. He's the creator of that theme: http://opendesktop.org/usermanager/search.php?username=jpfleury I installed version 6 and still do not see any resizing grippy. I will run more tests.

I now see the resizing grippy in my 2 tests thanks to changes in GTK3 theme (from oxygen-gtk to clearlooks-phenix-master) for GTK applications.

gtk3 addresses this.

Tests are disabled referencing this bug, so leaving open to track enabling the tests. http://searchfox.org/mozilla-central/source/layout/reftests/writing-mode/reftest.list#21

Comment on attachment 8802815 [details] bug 1094845 enable vertical writing mode textarea resizer tests https://reviewboard.mozilla.org/r/87122/#review86152

Pushed by ktomlinson@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/ec43bb1d3fdb enable vertical writing mode textarea resizer tests r=jfkthame