[Fontconfig] Marking glyphs as deliberately blank, per font

[Nicolas Mailhot]

Le jeudi 26 novembre 2009 à 19:44 +0100, Nicolas Mailhot a écrit :

> I think you could solve many user pains by
> making it possible to use
> 
> <font>
>  <family>some family name</family>
>  <style>some style name</style>
>  <format>some font format name</format>
>  <unicode>
>    <min>some-unicode-value</min>
>    <max>some-greater-unicode-value</max>
>  <unicode>
>  <lang>some fontconfig orth id</lang>
> </font>

…

> And it would also be useful to define a <not/> operator, for example
> <not>
>  <lang>ja_Ja</lang>
> </not>

And just to be 100% clear, in my mind

1. sub-elements of fonts are implicitely OR-ed if they are of the same
kind: 
<font>
<family>foo</family>
<family>bar</family>
<font>

applies to all fonts with a family name of foo or bar

2. sub-elements of fonts are implicitely AND-ed if they are of different
kinds

<font>
<family>foo</family>
<style>bar</style>
<font>

applies to fonts only if they have the foo family and the bar style

3. lang and unicode are of the same kind: they are two different ways to
specify an unicode range. Maybe it's better to make it explicit and
define a

<glyph type="unicode-range"/> and <glyph type="lang"/> selector?

-- 
Nicolas Mailhot