Safari 17.0 fixes bugs with display: contents

[jensimmons]

Safari 17.0 fixes accessibility bugs with display: contents.

Improvements in the experience of elements which are styled display:contents include:

• Making HTML tables and table components available to the accessibility tree.
• Ensuring elements with the ARIA roles grid, treegrid, table, row, gridcell, cell, columnheader, tree and treeitem are properly exposed in the accessibility tree.
• Ensuring aria-checked works for elements with the ARIA roles tree and treeitem.
• Returning the correct sub-role for lists, including elements with an ARIA role of directory.
• Ensuring elements are not missing their children.
• Making elements able to return selected accessibility children.
• Computing the accessible name that rely on labels or captions.
• Computing the correct accessibility clickpoint for links and headings.
• Properly exposing lists that have display:contents list items.
• Making aria-checked work for role="treeitem".
• Making aria-activedescendant work.
• Making aria-grabbed and aria-dropeffect work.
• Making aria-flowto work.
• Making CSS speak-as, AXAccessKey, aria-owns, and URL AX APIs work.

Safari 17.0 also fixes accessibility issues with HTML tables and table components that have display: flex, grid, block, or inline-block applied.

https://webkit.org/blog/14445/webkit-features-in-safari-17-0/

This should be everything. We are happy to give this PR some time so folks can test. If you do find more bugs, please do file them at bugs.webkit.org, so we can address them.

[Fyrd]

Great to hear, thanks!