tree d2f8ef708e2e17f8d537a6449df513f53270c2ff
parent 40402d084b70b12a774f8bf9d19e42a022e484e0
author Keith Cirkel <chromium@keithcirkel.co.uk> 1698363749 -0700
committer Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> 1698364634 -0700

Add invoketarget logic for popovers in button DefaultEventHandler

This adds logic on how buttons with an invoketarget pointing to an
element with `popover` should behave, based on the Invokers proposal.

See explainer section here:
https://open-ui.org/components/invokers.explainer/#defaults.

See related spec PR here: https://github.com/whatwg/html/pull/9875

This introduces new behavior just within the HTML Form Control
`DefaultEventHandler` function such that:

 - If an `invoketarget` points to an element with `popover`
    - If the `invokeaction` is `auto` or `togglePopover`, try to toggle
      the popover
    - If the `invokeaction` is `hidePopover`, try to hide the popover
    - If the `invokeaction` is `showPopover`, try to show the popover

If the `invokeaction` is none of the above, then it will fall through
the to `HandleInvokeInternal` which is passed the lowercased atom so
element subclasses can handle their individual behaviors.

Bug: 1494737
Change-Id: Id2ab6faf8782a0fe0ba5c9f05ff562fee640f8b0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4964940
Reviewed-by: Joey Arhar <jarhar@chromium.org>
Reviewed-by: Mason Freed <masonf@chromium.org>
Commit-Queue: Luke <lukewarlow156@gmail.com>
Cr-Commit-Position: refs/heads/main@{#1215820}