\ProvidesPackage{cxltx-style-smashbox}


% ----------------------------------------------------------------------------------------------------------
\def\boxit#1#2{%
  % Draw a box around the content. In some situations, `\hbox`ed content that would otherwise extend to the
  % end of the line is collapsed to minimal length.
  %
  % From Raymond Seroul, Silvio Levy, "A Beginner's Book of TeX", 1991, p97
  \hbox{\vrule
    \vtop{%
      \vbox{\hrule\kern#1%
        \hbox{\kern#1#2\kern#1}}%
      \kern#1\hrule}%
    \vrule}}

\def\BOX#1{\boxit{0pt}{#1}}

% ----------------------------------------------------------------------------------------------------------
\def\sbSmash#1{%
  % Make a box around the content and set its height and depth to zero, thereby preventing overly high or
  % deep material to cause gaps between the lines. As a side effect, hyphenation and line breaking are also
  % disabled.
  %
  % Example:
  %
  %   Jabba jabba jabba jabba jabba jabba jabba jabba jabba jabba jabba jabba jabba jabba jabba jabba jabba
  %   A \smash{\Huge{smashing}} success.
  %   Jabba jabba jabba jabba jabba jabba jabba jabba jabba jabba jabba jabba jabba jabba jabba jabba jabba
  %
  % From Raymond Seroul, Silvio Levy, "A Beginner's Book of TeX", 1991, p91
  \setbox0=\hbox{#1}\ht0=0pt\dp0=0pt\box0}

% ----------------------------------------------------------------------------------------------------------
% Sometimes, when trying to measure the current position, things don't work out as expected; for example, at
% the start of a paragraph, `zref-savepos` yields faulty `y` positions because nothing has been typeset yet.
% In such cases, `\sbDummy` may be used; it simply puts a zero-width `\makebox` into the stream which isn't
% visible, but causes the positioning to be 'initialized'. As such, this command is 'not worth the effort',
% as its definition is simply `\makebox[0mm]{}`; however, it's perhaps helpful to name this critter.
% Inspired by https://groups.google.com/d/msg/comp.text.tex/GikFchXJIM0/jVzCFGGzzacJ
\newcommand{\sbDummy}{%
  \makebox[0mm]{}%
}