[Webkit-unassigned] [Bug 123889] [ATK] "Indeterminate" state and state changes in tri-state checkboxes should be exposed to ATs

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=123889





--- Comment #8 from Krzysztof Czech <k.czech at samsung.com>  2014-02-13 06:22:11 PST ---
> > Source/WebCore/accessibility/atk/AXObjectCacheAtk.cpp:203
> > +    // WebKit notifies it as many times as children changes its states.
> 
> I think we should try to resolve the issue of multiple updates being posted rather than storing a boolean value and a list of tri state objects in every AXObject. That seems to paper over the problem which may affect other cases as well as this one

Basically those notifications from children are triggered by a tri-state object when its state is changed, so this is a proper behavior. The thing was that webkit notified them as they came from a tri-state object which was wrong.
This happened because child elements were not accessible.

Regarding this boolean value. I guess there is no other way to know that particular element is a tri-state objects. Well there's an option to check the aria-checked attribute but when the state is different than mixed then it's not possible. So my idea is to store this information in AccessibilityObject every time I find a proper element with a mixed state. Having this value, I'm able to send a signal to ATs when this state is set or not.

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