137867 2014-10-19 15:11:18 -0700 AX: [ATK] Do not return ATK_ROLE_UNKNOWN for null or otherwise invalid accessible objects 2014-11-13 14:11:48 -0800 1 1 1 Unclassified WebKit Accessibility 528+ (Nightly build) All Linux RESOLVED FIXED InRadar P2 Normal --- 1 jdiggs jdiggs aboxhall apinheiro cfleizach cgarcia commit-queue dmazzoni jcraig mario samuel_white oldest_to_newest 1042699 0 jdiggs 2014-10-19 15:11:18 -0700 Currently in webkitAccessibleGetRole() we have: g_return_val_if_fail(WEBKIT_IS_ACCESSIBLE(object), ATK_ROLE_UNKNOWN); returnValIfWebKitAccessibleIsInvalid(WEBKIT_ACCESSIBLE(object), ATK_ROLE_UNKNOWN); and: if (!coreObject) return ATK_ROLE_UNKNOWN; ATK_ROLE_UNKNOWN suggests that there is a valid accessible object but the platform role mapping for that object is unknown. It is an indication of a WebKit bug (there should be a valid mapping). But it is also an indication to assistive technologies that there might be some obtainable useful information associated with this mystery object. As such assitive technologies might choose to poke at the object further. In contrast, if the object is null or otherwise invalid, there is arguably no obtainable useful information and thus ATs should not bother trying. We can distinguish these two conditions by exposing the latter as ATK_ROLE_INVALID. 1042700 1 240090 jdiggs 2014-10-19 15:15:33 -0700 Created attachment 240090 Patch 1042701 2 jdiggs 2014-10-19 15:17:55 -0700 (In reply to comment #1) > Created attachment 240090 [details] > Patch This is a WIP (hence not asking for review yet). Fixing the bug is simple enough; coming up with a test case is harder because we shouldn't be exposing accessible objects that have ROLE_UNKNOWN or ROLE_INVALID to assistive technologies in the first place. But I haven't given up quite yet. :) 1044271 3 webkit-bug-importer 2014-10-27 11:03:21 -0700 <rdar://problem/18782947> 1048459 4 241496 jdiggs 2014-11-13 12:41:51 -0800 Created attachment 241496 Patch 1048466 5 jdiggs 2014-11-13 13:14:25 -0800 Mario or Chris: The patch is trivial. And there is a test now. (I had forgotten about detached objects as a valid and easy means to test this.) So if either of you has time for a quick review, that would be awesome. Thanks! 1048473 6 241496 jdiggs 2014-11-13 13:30:21 -0800 Comment on attachment 241496 Patch Thanks Chris! 1048483 7 241496 commit-queue 2014-11-13 14:11:40 -0800 Comment on attachment 241496 Patch Clearing flags on attachment: 241496 Committed r176091: <http://trac.webkit.org/changeset/176091> 1048484 8 commit-queue 2014-11-13 14:11:48 -0800 All reviewed patches have been landed. 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