virtual Dimension const defaultDimension() const = 0;
/// return the em size
virtual int em() const = 0;
+ /// return the width of a line for underlining
+ virtual int lineWidth() const = 0;
+ /// return the distance from the base line to where an underline
+ /// should be drawn.
+ virtual int underlinePos() const = 0;
+ /// return the distance from the base line to where the strike out line
+ /// should be drawn.
+ virtual int strikeoutPos() const = 0;
/// return the width of the char in the font
virtual int width(char_type c) const = 0;
inline int center(char_type c) const {
return (rbearing(c) - lbearing(c)) / 2;
}
+
+ /// return the number of expanding characters taken into account for
+ /// increased inter-word spacing during justification
+ virtual int countExpanders(docstring const & str) const = 0;
};