W3C home > Mailing lists > Public > www-style@w3.org > March 2011

Re: [CSS2.1] list-style-image sizing rules don't match reality

From: Tab Atkins Jr. <jackalmage@gmail.com>
Date: Tue, 15 Mar 2011 09:48:06 -0700
Message-ID: <AANLkTik-oPYhybe_VntY9gYk35DW=hPbKaxZK6Litzh8@mail.gmail.com>
To: Arron Eicholz <Arron.Eicholz@microsoft.com>
Cc: fantasai <fantasai.lists@inkedblade.net>, www-style list <www-style@w3.org>
On Tue, Mar 15, 2011 at 9:22 AM, Arron Eicholz
<Arron.Eicholz@microsoft.com> wrote:
> Below is the correct change that will be made to the CSS 2.1 specification[1]. Sorry for the confusion and I hope the resolves your issue.
> | 1. If the image has an intrinsic width and height, the used width and
> | height are the same.
> |
> | 2. Otherwise, if the image has an intrinsic ratio and either an
> | intrinsic width or an intrinsic height, the used width/height is the
> | same as the provided intrinsic width/height, and the used value of the
> | missing dimension is calculated from the provided dimension and the
> | ratio.
> |
> | 3. Otherwise, if the image has an intrinsic ratio, the used width is
> | 1em and the used height is calculated from this width and the
> | intrinsic ratio.  If this would produce a height larger than 1em, then
> | the used height is instead set to 1em and the used width is calculated
> | from this height and the intrinsic ratio.
> |
> | 4. Otherwise, the image's used width is its intrinsic width if it has
> | one, or else 1em.  The image's used height is its intrinsic height if
> | it has one, or else 1em.
> Please respond before 18 March, 2011 if you do not accept the current resolution.

Yup, that works.

I recall that fantasai complained during the meeting of my text being
overly verbose.  fantasai, want to try this on for size instead?

| 1. If the image has only an intrinsic aspect ratio
| and no intrinsic width or intrinsic height, set the
| used width to 1em and calculate the used height from
| the width and the aspect ratio.  If this would produce
| a used height larger than 1em, then instead set the
| used height to 1em and calculate the used width from
| the height and the aspect ratio.
| 2. Otherwise, set the used width and height to the
| intrinsic width and height, if they exist.  If there
| are any missing dimensions, and the image has an
| intrinsic aspect ratio, calculate the missing
| dimension from the existing dimension and the aspect
| ratio.  Otherwise, set the missing dimensions to 1em.

This is much shorter, but should be equally precise.  It also hits all
8 combinations of missing/present dimensions.  Is this better enough
to accept instead?

(If not, that's fine - I'm happy enough with my previous proposal that
we resolved on.)

Received on Tuesday, 15 March 2011 16:49:22 UTC

This archive was generated by hypermail 2.3.1 : Wednesday, 11 February 2015 12:34:49 UTC