On 29/12/2015 5:52 AM, Dominic Mazzoni via Accessibility-ia2 wrote:
Totally agreed that screen readers need to be able to navigate from
cell to cell and fetch rows at a time. Note that the spec requires the
numbering to be sequential, so you don't need to worry about that.
When I said sequential, I also meant contiguous; i.e. 1, 2, 3, not 1, 2, 5.
I'd like to point out that in vanilla HTML it's quite common for
tables to have missing cells already.
Missing cells only towards the end of rows, never in the middle or at
the start. So, you might not be able to move to the next cell at the end
of an incomplete row, but that's okay because you've already seen all of
the cells on that row. Conversely, if there are cells missing at the
start or in the middle of a row, it may be impossible to get to other
cells in the row.
Screen readers shouldn't have to do any extra work to deal with most
such tables because they already need to be able to handle missing
cells, so this wouldn't be any different.
See above. Start/middle gaps are a problem and I can't even think of a
good way to handle this. This is why I am probably more for this solution:
The alternative proposal seems to be to export the ARIA attributes
and/or use group position and have the screen reader announce the ARIA
row and column indexes but otherwise explore the table from the DOM.
* Screen readers wouldn't be able to jump to a cell by row, column
index. (JAWS has a keystroke for this now.)
Hmm. That certainly is a problem, yes.
I guess another solution could be to extend IAccessibleTableCell to
provide a way to get to the next cell in a given direction. I *think*
that would solve the start/middle gap problem.
Jamie
--
James Teh
Executive Director, NV Access Limited
Ph +61 7 3149 3306
www.nvaccess.org
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