In ARIA 1.1, aria-orientation was added to the following roles with the specified implicit values: * combobox: undefined * listbox: vertical * menu: vertical * menubar: horizontal * radiogroup: undefined * tablist: horizontal * toolbar: horizontal * tree: vertical * treegrid: undefined In ARIA 1.1, the following changes related to aria-orientation were also made: * aria-orientation's default value changed from horizontal to undefined * separator now has implicit value of horizontal * slider now has implicit value of horizontal Please note, the following steps to reproduce only test a couple of roles for their implicit values. At the time of this report, automated tests to verify correct exposure are still being written. Steps to reproduce: 1. Load data:text/html,<div role="treegrid" /> 2. Use Accerciser to examine the state set of the accessible element 3. Load data:text/html,<div role="combobox" /> 4. Use Accerciser to examine the state set of the accessible element Expected result: The state set would not contain STATE_HORIZONTAL or STATE_VERTICAL for either test case, because neither orientation value is specified and the implicit value of aria-orientation for treegrid and combobox are "undefined." Actual result: The state set contains STATE_VERTICAL for the two test cases.

Comment on attachment 8879524 [details] [diff] [review] proposed patch Review of attachment 8879524 [details] [diff] [review]: ----------------------------------------------------------------- r=me, thanks!

Comment on attachment 8879524 [details] [diff] [review] proposed patch Clearing the checkin flag. I thought that was "checkin needed". Sorry!

Pushed by cbook@mozilla.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/343e7dbd5be2 Implement or update support for exposure of aria-orientation. r=surkov