No support for MathML menclose element

[thrintuim]

Steps to reproduce

1. navigate to the menclose MDN article
2. Using NVDA with Access8Math installed navigate to the notation portion of the Attributes section.
3. Read through the table of possible @notation values, noting the announcement of math in column "Rendering in your browser"
4. Notice that NVDA will announce "a squared plus b squared" regardless of notation used in the menclose element.

Expected behavior

Some mention of the enclosing notation is expected. JAWS 2022 provides the following announcements for the math expressions in the table based on their notation. notation="longdiv": a squared + b squared, under long division symbol MathContent notation="actuarial": a squared + b squared, under actuarial symbol MathContent notation="radical": a squared + b squared, under radical symbol MathContent notation="box": a squared + b squared, surrounded by box MathContent notation="roundedbox": a squared + b squared, surrounded by rounded box. MathContent notation="circle": a squared + b squared, surrounded by circle MathContent notation="left": a squared + b squared, with line on the left MathContent notation="right": a squared + b squared, with line on the right MathContent notation="top": a squared + b squared, with line on the top MathContent notation="bottom": a squared + b squared, with line on the bottom MathContent notation="updiagonalstrike": a squared + b squared, covered by up diagonal strike MathContent notation="downdiagonalstrike": a squared + b squared, covered by down diagonal strike MathContent notation="verticalstrike": a squared + b squared, covered by virtacal strike MathContent notation="horizontalstrike": a squared + b squared, covered by horizontal strike MathContent notation="madruwb": a squared + b squared, madruwb MathContent notation="updiagonalarrow": a squared + b squared MathContent notation="phasorangle": a squared + b squared MathContent

NVDA + MathPlayer output is as follows: notation="longdiv": long division symbol enclosing a squared plus b squared end symbol notation="actuarial": actuarial symbol enclosing a squared plus b squared end symbol notation="radical": the square root of a squared plus b squared
notation="box": begin box a squared plus b squared end box notation="roundedbox": begin rounded box a squared plus b squared end rounded box notation="circle": begin circle a squared plus b squared end circle notation="left": line left of a squared plus b squared end line notation="right": line right of a squared plus b squared end line notation="top": line above a squared plus b squared end line notation="bottom": line below a squared plus b squared end line notation="updiagonalstrike": cross out enclosing a squared plus b squared end crossout notation="downdiagonalstrike": cross out enclosing a squared plus b squared end crossout notation="verticalstrike": cross out enclosing a squared plus b squared end crossout notation="horizontalstrike": cross out enclosing a squared plus b squared end crossout notation="madruwb": a squared plus b squared notation="updiagonalarrow": math m l error long division symbol enclosing a squared plus b squared end symbol end math m l error notation="phasorangle": a squared plus b squared

The menclose element is the only way to get long division symbols to render in Firefox. This is the same for MathJax, unless you add the extension that provides support for mlongdiv, mstack, etc. Obviously neither MathPlayer nor JAWS provide support for all notations but long division, crossouts, shapes, and lines would go a long way.

[tsengwoody]

commit d73a89

[thrintuim]

There is a slight type on line 700 in A8M_PM.py causing NVDA to announce "notation:line on button" for @notation="bottom". Tested all the other notation type and they sound great!