Am 12.05.11 03:07, schrieb Philippe Wittenbergh:
On May 10, 2011, at 6:51 PM, Joergen W. Lang wrote:
>
According to the spec (1) the values for 'font-size' and
'font-family' must be specified at all times.
Correct. E { font: 1em/1.5 'my font' sans-serf;} is the minimal
syntax.
I guess, the value for line-height could also be omitted. There should
be a comma between 'my font' and 'sans-serif', d'accord?:
E { font: 1em 'my font', sans-serf;}
[...]
button { font: menu; }
which then can be altered via single properties. This seems to
violate the "last two values are mandatory" rule.
No, read carefully
http://www.w3.org/TR/CSS21/fonts.html#propdef-font
http://www.w3.org/TR/css3-fonts/#font-prop
Under Values, the system fonts are specified outside of the [ ].
Oh, good old regular expressions. That's where I failed.
and
then [quote] System fonts may only be set as a whole; that is, the
font family, size, weight, style, etc. are all set at the same time.
These values may then be altered individually if desired [/quote]
The second sentence specifies that you need to use the individual
properties separately to modify style/weight/...
Agreed. It was the first sentence that had me confused. Specifically "as
a whole" which could easily be interpreted as "values for single
properties must be given in one declaration". Same for "are all set at
the same time".
A more concise wording might be:
"System fonts may only be set using the shorthand form. In this case one
of the above keywords ('caption', 'icon', 'menu', 'message-box',
'small-caption', or 'status-bar') replaces the minimal two-argument
form. The font family, size, weight, style, etc. are all set implicitly.
These values may then be altered individually using single properties if
desired."
For the moment I do not see a lot of use cases for system fonts. But
this may change with more web applications emulating the behaviour of
native apps. Would this be an issue for www-style?
Jørgen W. Lang
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