Re: Several suggestions for image support

[Kim F. Storm]

Kenichi Handa <address@hidden> writes:

> In article <address@hidden>, address@hidden (Kim F. Storm) writes:
> > I have just installed changes to revert to the 21.3 functionality for
> > newline height calculation, that is, use the current face font height
> > (by default).
> 
> > Then I added a new line-height property on the newline with the
> > following values:
>  
> >          nil -> use height of current face (the default)
> >          t -> use default face height (as minimum height)
> >          0   -> use (don't increase) actual line height
> >          N (integer > 0)  -> use N pixels (as minimum height)
> >          F (float > 0.0)  -> use F * current face font height
>  
> If there's no line-height property, a height of a space
> glyph (for SPC, TAB, NL) is decided by the height of a SPACE
> glyph of a font.  But, it seems that we can make their
> height exactly what requested by a face.  Then I think we
> don't have to introduce line-height property.  Each
> line-height property value can be simulated as follows.
> 
> nil -- do nothing
> t -- add `default' face
> 0 -- make a face of height 0 and add it
> N -- make a face by :height N (but specifies it by 1/10 pt) and add it.
> F -- make a face by :height F and add it

This is possible, yes, but the main advantage of the line-height
property is that you can put it on an entire region -- independent of
the faces in that region -- and make the line spacing work independint
of filling, untabitying etc. which may add/delete newlines (which will
automatically inherit the line-height property).

-- 
Kim F. Storm <address@hidden> http://www.cua.dk