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Re: Mean character width for 16px Google Fonts (818 Families)

From: Laura Carlson <laura.lee.carlson@gmail.com>
Date: Wed, 31 May 2017 07:31:30 -0500
Message-ID: <CAOavpvcGKDyrybwPQGqWMP778wzcm-ux=k7wvGxL6sK1gcYGfQ@mail.gmail.com>
To: "Patrick H. Lauke" <redux@splintered.co.uk>
Cc: w3c-wai-gl@w3.org, public-low-vision-a11y-tf <public-low-vision-a11y-tf@w3.org>
Hi Patrick,

On 5/31/17, Patrick H. Lauke <redux@splintered.co.uk> wrote:
> Just wondering: as useful as this research is, is there a risk that this
> (and the related proposed SC) is going to cause issues of
> internationalisation (CJK fonts, arabic fonts, etc, as well as vertical
> text)? The proposed SC should cover these scenarios too, or at the very
> least mention them.

The font bullet was removed from the current Adapting Text SC [1] in
part due to internalization concerns. Please check the Adapting Text
Open Issues [2] as well as the Adapting text user to content
requirements table [3].

Since we don't have the font bullet anymore, I wanted to verify with
Wayne that the spacing metrics in the SC are adequate for when a large
font-family is selected and/or increased spacing is applied to text
for some layouts.

The SC text [1] currently  reads:

If the technologies being used by the author allow users to override
the author-supplied values for the appearance of text (with the
exception of images of text and closed/open captions), no loss of
essential content or functionality occurs when the following are

* line spacing (leading) to at least 1.5
* letter spacing (tracking) to at least 0.12 em
* word spacing to at least 0.16 em

Editor's note: The Working Group seeks to to include overriding text
color, background color, and font-family as part of this SC, but is
not yet able to identify a way to do so that is sufficiently testable.


Do you think we need an additional editor's note regarding the spacing
metrics impact on internationalization, even though we don't have a
font bullet? If so, can you suggest text for it?

Thank you.

Kindest Regards,

[1] https://github.com/w3c/wcag21/issues/78
[2] https://www.w3.org/WAI/GL/wiki/WCAG_2.1_SC_status#Issue_78_-_Adapting_Text
[3] https://www.w3.org/WAI/GL/low-vision-a11y-tf/wiki/Adapting_text_user_to_content_requirements_table

Laura L. Carlson
Received on Wednesday, 31 May 2017 12:32:06 UTC

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