Detecting and testing font in LaTeX

det_test_font_tex.md

http://tex.stackexchange.com/questions/14377/how-can-i-test-for-the-current-font

\makeatletter
\newcommand{\showfont}{encoding: \f@encoding{},
  family: \f@family{},
  series: \f@series{},
  shape: \f@shape{},
  size: \f@size{}
}
\newcommand{\iffont}[3]{\ifthenelse{\equal{\f@family}{#1}}{#2}{#3}}
\makeatother