[Bug 3512] Implement font-stretch property

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--- Comment #67 from caribou <vincent.cariven at atosorigin.com> 2010-10-19 00:39:05 PDT ---
I noticed that the font-stretch property parsing is now implemented and that
each DOM element has the correct runtime value though the stretching itself is
not implemented. I also noticed that the @font-face declaration parsing 
mechanism knows about font-stretch.
I was wondering if it was difficult to implement the font switching when using
user fonts defined with @font-face regarding the value of font-stretch as it
does with the font-style and font-weight ones.
Ex: 
@font-face {
   font-family : MyFont;
   src : url(myfont.otf);
   font-stretch : normal;
}
@font-face {
   font-family : MyFont;
   src : url(myfont-condensed.otf);
   font-stretch : condensed;
}
...
@font-face {
   font-family : MyFont;
   src : url(myfont-expanded.otf);
   font-stretch : expanded;
}

Actually, the latest @font-face declaration overrides the previous one and
there is no font switching at all. In case that not all of the stretch variants
are defined through @font-face, the closest stretch font could be applied. I
don't think this represents a lot of work as all the basis are already
implemented (font-stretch and @font-face parsing)

Anyone can tell me if this partial implementation represents a lot of work to
include it in the future release?

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