%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Relevant documents:
%
% http://mirrors.ibiblio.org/CTAN/macros/xetex/generic/zhspacing/zhs-man.pdf
% http://vesta.informatik.rwth-aachen.de/ftp/pub/mirror/ctan/macros/xetex/latex/xecjk/xeCJK.pdf
% https://github.com/CTeX-org/ctex-kit
% http://ctan.math.utah.edu/ctan/tex-archive/macros/xetex/latex/ucharclasses/ucharclasses.pdf
% http://ctan.math.washington.edu/tex-archive/macros/xetex/latex/interchar/interchar.pdf
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


% ==========================================================================================================
% CJK INTER-CHARACTER GLUE AND WHITESPACE HANDLING
% ----------------------------------------------------------------------------------------------------------
\ProvidesPackage{cxltx-style-cjkglue}
\usepackage{cxltx-style-equals}
% \usepackage{xeCJK}

% ----------------------------------------------------------------------------------------------------------
% \newcommand{\cjkgGlue}{\hskip -0.4pt plus 3pt minus 1pt}%
% \newcommand{\cjkgGlue}{\hskip 0mm plus 0.7mm minus 0.7mm}%
% \newcommand{\cjkgGlue}{\hskip 0mm plus 0.7mm minus 0.7mm}%
\newcommand{\cjkgGlue}{\hskip 0mm plus 1.5mm minus 1.5mm}%
\def\cjkgKeepLines{false}%

% ----------------------------------------------------------------------------------------------------------
\chardef\CharNormal=0%
\chardef\CharCjk=1%
\chardef\CharCjkPunctA=2%
\chardef\CharCjkPunctB=3%
\chardef\CharBound=255%

% ----------------------------------------------------------------------------------------------------------
\newcommand{\cjkgUseCjkGlue}{%
  \eqTextEquals{\cjkgKeepLines}{true}{%
  % no-op
  }{%
    \obeyspaces\obeylines%
    \begingroup\lccode`\~=`\ \lowercase{\endgroup\let~}\cjkgGlue%
    \begingroup\lccode`\~=`\^^M\lowercase{\endgroup\let~}\cjkgGlue%
    % http://tex.stackexchange.com/a/10266/28067
    % ftp://ftp.mpi-sb.mpg.de/pub/tex/mirror/ftp.dante.de/pub/tex/info/xetexref/xetex-reference.pdf
    \XeTeXinterchartokenstate=1%
    \XeTeXinterchartoks\CharNormal\CharNormal={\cjkgGlue}%
    \XeTeXinterchartoks\CharNormal\CharCjk={\cjkgGlue}%
    \XeTeXinterchartoks\CharCjk\CharNormal={\cjkgGlue}%
    % \XeTeXinterchartoks\CharBound\CharCjk={>}%
    % \XeTeXinterchartoks\CharCjk\CharBound={<}%
    \XeTeXinterchartoks\CharCjkPunctA\CharCjk={\cjkgGlue}%
    \XeTeXinterchartoks\CharCjk\CharCjkPunctA={\cjkgGlue}%
    \XeTeXinterchartoks\CharCjkPunctB\CharCjk={\cjkgGlue}%
    \XeTeXinterchartoks\CharCjk\CharCjkPunctB={\cjkgGlue}%
    \XeTeXinterchartoks\CharCjk\CharCjk={\cjkgGlue}%
    }%
  }%