Add class and id mappings

[smockle]

Closes w3c/html-aam#553

Initially filed as w3c/html-aam#559

@aleventhal provided mappings in w3c/html-aam#553. I verified they match up with Chromium’s mappings:

id

• kHtmlId maps to id in ax_platform_node_base.cc;l=1506-1509
• kHtmlId maps to UIA_AutomationIdPropertyId in ax_platform_node_win.cc;l=5254-5264 (via GetAuthorUniqueId())
• kHtmlId maps to AXDOMIdentifier in ax_platform_node_cocoa.mm;l=1594-1601

class

• kClassName maps to class in ax_platform_node_base.cc;l=1492-1497
• kClassName maps to UIA_ClassNamePropertyId in ax_platform_node_win.cc;l=5265-5269
• kClassName maps to AXDOMClassList in ax_platform_node_cocoa.mm;l=1577-1592

Reviewers: Please also check the formatting. I’ve attempted to match existing styles, but those are inconsistent, e.g. “Object attributes” is bold in datetime (but not in draggable); it uses <code> in src (but not in abbr).

Previews

• class
• id

❧

Test, Documentation and Implementation tracking

Once this PR has been reviewed and has consensus from the working group, tests should be written and issues should be opened on browsers. Add N/A and check when not applicable.

• "author MUST" tests:
• "user agent MUST" tests:
• Browser implementations (link to issue or commit):
  • WebKit:
  • Gecko: Bug for AXDOMClassList on Webkit
  • Blink: current implementation
• Does this need AT implementations?
• Related APG Issue/PR:
• MDN Issue/PR:

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[rahimabdi]

Removing myself as reviewer as I just wanted to review the code references.

[spectranaut]

The change looks good, but we should verify that all implementations match it -- not just chrome. @rahimabdi, I added you back as a review because in the WG meeting we asked you to review for webkit, if you don't mind :)

I'll look at firefox now.

[spectranaut]

Ok, I checked Firefox, and Firefox doesn't implement AXDOMClassList on, but otherwise is good.
I think webkit implements both so this is good to land after three positive reviews :)

[scottaohara]

approving pending @rahimabdi's review to just verify the webkit mappings.

once good on that, we can merge.

[rahimabdi]

@smockle @spectranaut @scottaohara The WebKit mappings are correct:

• class maps to AXDOMClassList
• id maps to AXDOMIdentifier

[rahimabdi]

WebKit mappings are correct 👍🏾.