Re: Adapting Text Units: Spaces, paragraphs, and ems

+1 to Stephens technology agnostic language approach.

Awesome work Wayne, Alistair, Laura etc all...

Katie Haritos-Shea
703-371-5545

On Jul 12, 2017 2:11 PM, "Laura Carlson" <laura.lee.carlson@gmail.com>
wrote:

> Hi Steve,
>
> How would you propose to phase new paragraph bullet using font size?
> Lisa has objected to inclusion of the Adapting Text SC in 2.1 without
> it.
>
> Thanks.
>
> Kindest Regards,
> Laura
>
> On 7/12/17, Repsher, Stephen J <stephen.j.repsher@boeing.com> wrote:
> > We’re not being technology agnostic here.  The truth is that the only
> reason
> > we are drawing a difference between em units and a unitless factor on the
> > font size is technology-specific to CSS.  In reality they are exactly the
> > same, i.e. for the current element:
> >
> > `Line-height: 1.5` = `line-height: 1.5em`
> >
> > The problem is that these are inherited properties, so a length value in
> em
> > passes the same computed length to children, while the factor becomes a
> > factor on the child’s font size.  Obviously the latter is usually the
> > desired behavior.  Why the CSS standard doesn’t also allow factors to be
> > used for `letter-spacing` and `word-spacing` is a good question.
> >
> > So, to be totally technology agnostic here, we ought to pick one and be
> > consistent.  Given the confusion that could arise by specifying
> inheritance
> > with em units, I’d strongly vote for the following:
> >
> >
> > 1.       line height (line spacing) to at least 1.5 times the font size
> >
> > 2.       letter spacing (tracking) to at least 0.12 times the font size
> >
> > 3.       word spacing to at least 0.16 times the font size
> >
> > We can explain what this translates to for CSS in Understanding, which is
> > advantageous in case things change.
> >
> > Steve
> >
> > From: Alastair Campbell [mailto:acampbell@nomensa.com]
> > Sent: Wednesday, July 12, 2017 12:17 PM
> > To: John Foliot <john.foliot@deque.com>
> > Cc: Laura Carlson <laura.lee.carlson@gmail.com>; Greg Lowney
> > <gcl-0039@access-research.org>; Jason White <jjwhite@ets.org>; Detlev
> > Fischer <detlev.fischer@testkreis.de>; w3c-wai-gl@w3.org;
> > public-low-vision-a11y-tf <public-low-vision-a11y-tf@w3.org>
> > Subject: Re: Adapting Text Units: Spaces, paragraphs, and ems
> >
> > That’s fine for me, thanks.
> >
> > Any objections? Going, going…
> >
> > -Alastair
> >
> >
> > From: John Foliot
> >
> > Hi Alastair,
> >
> > A bit more fine-tuning... how about:
> >
> > * line-height (spacing) to at least 1.5 em (space line-and-a-half)
> > * spacing between paragraphs to at least 2 em (2 lines)
> >
> > * letter spacing (tracking) to at least 0.12 em
> > * word spacing to at least 0.16 em
> >
> > ???
> >
> > JF
> >
> >
>
>
> --
> Laura L. Carlson
>
>