MSAA Object Attributes

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Introduction

MSAA doesn't have a way to expose object attributes. In Gecko some object attributes are still exposed via the text in IAccessible::getDescription(). This technique is only used to support group attributes. This is a terrible hack that Mozilla still supports because older screen readers depend on it, but in the future it may be removed in favor of IA2 object attributes and groupPosition().

• if accessible object has group attributes and children then the accDescription is in the format of "L:level, :posinset of :setsize with :childcount"
• if accessible object has group attributes but hasn't children then the accDescription is in the format of "L:level, :posinset of :setsize"
• if accessible object has posinset and setsize attributes then the accDescription is in the format of ":posinset of :setsize"
• otherwise a normal description is used