Mapping for input type="color" is incorrect for ATK (and IA2?)

[joanmarie]

Most (all?) user agents implement support for input with a type attribute value of color as a push button which, upon activation, causes a color chooser to appear. For such implementations, the mapping should be to ATK_ROLE_PUSH_BUTTON. The resulting color chooser should have ATK_ROLE_COLOR_CHOOSER.

Docs: https://developer.gnome.org/atk/stable/AtkObject.html#AtkRole

ATK_ROLE_COLOR_CHOOSER: A specialized dialog that lets the user choose a color
(emphasis added)

Looking at https://github.com/LinuxA11y/IAccessible2/blob/master/api/AccessibleRole.idl#L82, it seems a similar change might be called for in the IA2 mappings.

EDIT: Both Gecko and WebKitGtk already expose the widget as ATK_ROLE_PUSH_BUTTON, so you have your two implementations already. 😄

[joanmarie]

@asurkov: Thoughts on this issue -- especially in terms of IA2?