[whatwg] getSelection().modify() in vertical writing modes

[Tab Atkins Jr.]

On Wed, Jun 15, 2011 at 6:55 PM, Ryosuke Niwa <rniwa at webkit.org> wrote:
> It seems like maintaining the semantics of 'character' and 'line' is the way
> to go then.  i.e. modify('move', 'right', character') moves caret visually
> downwards and modify('move', 'right', 'line') moves caret visually to the
> left (to the next line) in LTR text in a block with writing-mode:
> vertical-rl.

If it's helpful, the CSS Writing Modes spec defines the "line-left"
and "line-right" directions, which react properly to vertical writing
modes.  You may be able to reference/copy the definitions there.

~TJ