a11y atspi: Bridge IA2 strikeout text attrs to AT-SPI

When the text attributes an accessible interface reports
include one of the various "text-line-through-*"
IAccessible2 text attributes with a value that indicates
that strikethrough is applied [1], bridge that to the
AT-SPI layer via the "strikethrough" attribute with a
value of "true".

See also the ATK documentation [2] for the
`ATK_TEXT_ATTR_STRIKETHROUGH` text attribute.

This will not only be used by an upcoming change
that implements reporting that for Qt's own text
widgets, but is also needed for third-party applications.
Change for LibreOffice that makes use of this: [3]

[1] https://wiki.linuxfoundation.org/accessibility/iaccessible2/textattributes
[2] https://gnome.pages.gitlab.gnome.org/atk/AtkText.html#AtkTextAttribute
[3] https://gerrit.libreoffice.org/c/core/+/157939

Task-number: QTBUG-118106
Change-Id: Ieb98584a3c6270d8db508d59994f9ba244e2bc64
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>

0 files changed, 0 insertions, 0 deletions