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% nolbreaks.sty by Donald Arseneau
% Public domain software -- please submit any improvements to CTAN
\ProvidesPackage{nolbreaks}[2012/05/31 \space v 1.2 \space
- no linebreaks in text]
% Use \nolbreaks{some text} to prevent linebreaks in "some text".
% This has the advantage over \mbox{} that glue (rubber space)
% remains flexible. It has the disadvantage of not working in
% all cases! Most common cases are handled here (\linebreak is
% disabled, for example) but spaces hidden in macros or braces
% can still create break-points. Conversely, syntactic space
% characters not so hidden may cause command errors, so try to
% avoid such complexity by using simple text.
%
% Large pieces of text with no breaks can cause problems with
% paragraph justification. Using the alternate \nolbreaks*
% allows a line before the unbreakable text to be cut short
% (like ragged-right). Giving the package option [ragged]
% converts all \nolbreaks commands to \nolbreaks*.
%
% You should declare \sloppy or set a raised \tolerance in
% your document when you have large non-breaking chunks.
%
% The command name "\nolbreaks" is long to type, so you should
% probably declare a shorter name if you use it a lot, like
% \newcommand\n{\nolbreaks}
% or define commands for the text you want unbroken.
%
% I, Donald Arseneau, have dedicated the nolbreaks package to the
% public domain by waiving all rights to the work worldwide under
% copyright law, including all related and neighboring rights, to
% the extent allowed by law.
%
% You can copy, modify, and distribute this work, including for
% commercial purposes, without restriction and without asking
% permission.
\DeclareOption{ragged}{
\let\nb@ragged Y
}
\ProcessOptions
\let\nb@@iwspace=\ %
\let\nb@@hskip=\hskip
\let\nb@@penalty=\penalty
\newcount\nb@counter
\ifx\langwohyphens\undefined
\newlanguage\nb@lang
\else
\let\nb@lang\langwohyphens
\fi
\ifx\nb@ragged Y
\DeclareRobustCommand{\nolbreaks}{%
\leavevmode
\begingroup
\@ifstar {\nb@ragged\nb@nolb}{\nb@ragged\nb@nolb}%
}
\else
\DeclareRobustCommand{\nolbreaks}{%
\leavevmode
\begingroup
\@ifstar {\nb@ragged\nb@nolb}\nb@nolb
}
\fi
\def\nb@ragged{%
\skip@\lastskip \unskip
\nb@counter\lastpenalty
\ifnum\nb@counter<99 \nb@counter99 \fi
\hskip \z@ \@plus 2cm\relax
\penalty\nb@counter
\advance\skip@ \z@ \@plus -2cm\relax
\hskip\skip@
}
\newcommand\nb@nolb[1]{%
% Prevent automatic hyphenation
\language\nb@lang
\let\language\nb@counter
% Want to prevent breaks after hyphen char, but this doesn't
% work whan applied locally. What to do?
\exhyphenpenalty\@M
% In order to handle explicit hyphens, we disable the hyphenchar
% of the font, and any other selected fonts, and then restore
% the original settings at the end.
\global\nb@RestHyph\expandafter{\selectfont}%
\def\selectfont{\the\nb@RestHyph \nb@SaveHChar}%
\global\nb@RestHyph{}\nb@SaveHChar
% Disable commands that give breakpoints
\let\ \nb@iwspace
\let\hskip\nb@hskip
\let\penalty\nb@penalty
\let\discretionary\nb@discretionary
\let\\\nb@eol % also remove \hfill effect.
% Prevent breaks in math
\relpenalty\@M
\binoppenalty\@M
% Prevent breaks at spaces (only outermost visible spaces)
\nb@MarkSpaces {\nb@@penalty\@M}{}#1 \nb@MarkSpaces\nb@MarkSpaces\relax
% Restore previous \hyphenchar settings
\the\nb@RestHyph \global\nb@RestHyph{}%
\endgroup
}
% Insert penalties (or any marker) before all spaces. This should
% be invoked like it is a few lines above. This version gathers the
% argument, with inserted penalties, before finally handing
% the entire text over for further processing.
% #1 = the penalty or other material to insert before spaces
% #2 = accumulated processed argument
% #3 = argument up to the next space.
% #4,#5 = remaining argument, yet to process
% \nb@MarkSpaces is a sentinal token, so don't mix recursively.
% #6 = trailing signal token, either \nb@MarkSpaces or \relax
% Multiple adjacent spaces are converted to a single penalty,space pair.
%
\def\nb@MarkSpaces#1#2#3 #4#5\nb@MarkSpaces#6{%
\ifx\nb@MarkSpaces#6\expandafter\@firstoftwo % accumulate
\else \expandafter\@secondoftwo % finished
\fi
{\nb@MarkSpaces {#1}{#2#3#1 }#4#5\nb@MarkSpaces#6}%
{#2#3}%
}
\def\nb@iwspace{\nb@@penalty\@M \nb@@iwspace}
\def\nb@hskip {\nb@@penalty\@M \nb@@hskip}
\def\nb@penalty{\nb@@penalty\@M \nb@counter}
\long\def\nb@discretionary#1#2#3{\mbox{#3}}%
\def\nb@eol{\@ifstar\nb@eoL\nb@eoL}
\newcommand\nb@eoL[1][]{}
% we save (implicit global) hyphenchar settings for each font on a
% manual stack -- the token register \nb@RestHyph -- before changing
% them. Then eventually execute \nb@RestHyph to restore them.
\newtoks\nb@RestHyph \global\nb@RestHyph{}
\def\nb@SaveHChar{\begingroup
\edef\@tempa{\hyphenchar\the\font=\the\hyphenchar\font\relax \the\nb@RestHyph}%
\global\nb@RestHyph\expandafter{\@tempa}%
\hyphenchar\font\m@ne
\endgroup}
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