% ----------------------------------------------------------------------
% Some useful commands when doing highlighting of Agda code in LaTeX.
% ----------------------------------------------------------------------

\ProvidesPackage{agda}

\RequirePackage{ifxetex, ifluatex, xifthen, xcolor, polytable, etoolbox,
                calc}

% https://tex.stackexchange.com/questions/47576/combining-ifxetex-and-ifluatex-with-the-logical-or-operation
\newif\ifxetexorluatex
\ifxetex
  \xetexorluatextrue
\else
  \ifluatex
    \xetexorluatextrue
  \else
    \xetexorluatexfalse
  \fi
\fi

% ----------------------------------------------------------------------
% Options

\DeclareOption{bw}   {\newcommand{\AgdaColourScheme}{bw}}
\DeclareOption{conor}{\newcommand{\AgdaColourScheme}{conor}}

\newif\if@AgdaEnableReferences\@AgdaEnableReferencesfalse
\DeclareOption{references}{
  \@AgdaEnableReferencestrue
}

\newif\if@AgdaEnableLinks\@AgdaEnableLinksfalse
\DeclareOption{links}{
  \@AgdaEnableLinkstrue
}

% If the "nofontsetup" option is used, then some font packages are
% loaded, but specific fonts are not selected.
\newif\if@AgdaSetupFonts\@AgdaSetupFontstrue
\DeclareOption{nofontsetup}{
  \@AgdaSetupFontsfalse
}

\ProcessOptions\relax

% ----------------------------------------------------------------------
% Font setup

% XeLaTeX or LuaLaTeX
\ifxetexorluatex

    % Hack to get the amsthm package working.
    % https://tex.stackexchange.com/questions/130491/xelatex-error-paragraph-ended-before-tempa-was-complete
    \let\AgdaOpenBracket\[\let\AgdaCloseBracket\]
    \RequirePackage{fontspec}
    \let\[\AgdaOpenBracket\let\]\AgdaCloseBracket
    \RequirePackage{unicode-math}

    \tracinglostchars=2 % If the font is missing some symbol, then say
                        % so in the compilation output.

    \if@AgdaSetupFonts
      \setmainfont
        [ Ligatures      = TeX
        , BoldItalicFont = xits-bolditalic.otf
        , BoldFont       = xits-bold.otf
        , ItalicFont     = xits-italic.otf
        ]
        {xits-regular.otf}

      \setmathfont{xits-math.otf}
      \setmonofont[Mapping=tex-text]{FreeMono.otf}

      % Make mathcal and mathscr appear as different.
      % https://tex.stackexchange.com/questions/120065/xetex-what-happened-to-mathcal-and-mathscr
      \setmathfont[range={\mathcal,\mathbfcal},StylisticSet=1]{xits-math.otf}
      \setmathfont[range=\mathscr]{xits-math.otf}
    \fi

    \providecommand{\DeclareUnicodeCharacter}[2]{\relax}

% pdfLaTeX
\else
    \RequirePackage{ucs, amsfonts, amssymb}
    \RequirePackage[safe]{tipa} % See page 12 of the tipa manual for what
                                % safe does.

    % https://tex.stackexchange.com/questions/1774/how-to-insert-pipe-symbol-in-latex
    \RequirePackage[T1]{fontenc}
    \RequirePackage[utf8x]{inputenc}
\fi

% ----------------------------------------------------------------------
% Colour schemes.

\providecommand{\AgdaColourScheme}{standard}

% ----------------------------------------------------------------------
% References to code (needs additional post-processing of tex files to
% work, see wiki for details).

\if@AgdaEnableReferences
  \RequirePackage{catchfilebetweentags, xstring}
  \newcommand{\AgdaRef}[2][]{%
    \StrSubstitute{#2}{\_}{AgdaUnderscore}[\tmp]%
    \ifthenelse{\isempty{#1}}%
               {\ExecuteMetaData{AgdaTag-\tmp}}%
               {\ExecuteMetaData{#1}{AgdaTag-\tmp}}
  }
\fi

\providecommand{\AgdaRef}[2][]{#2}

% ----------------------------------------------------------------------
% Links (only done if the option is passed and the user has loaded the
% hyperref package).

\if@AgdaEnableLinks
  \@ifpackageloaded{hyperref}{

    % List that holds added targets.
    \newcommand{\AgdaList}[0]{}

    \newtoggle{AgdaIsElem}
    \newcounter{AgdaIndex}
    \newcommand{\AgdaLookup}[3]{%
      \togglefalse{AgdaIsElem}%
      \setcounter{AgdaIndex}{0}%
      \renewcommand*{\do}[1]{%
      \ifstrequal{#1}{##1}%
        {\toggletrue{AgdaIsElem}\listbreak}%
        {\stepcounter{AgdaIndex}}}%
      \dolistloop{\AgdaList}%
      \iftoggle{AgdaIsElem}{#2}{#3}%
    }

    \newcommand*{\AgdaTargetHelper}[1]{%
      \AgdaLookup{#1}%
        {\PackageError{agda}{``#1'' used as target more than once}%
                            {Overloaded identifiers and links do not%
                             work well, consider using unique%
                             \MessageBreak identifiers instead.}%
        }%
        {\listadd{\AgdaList}{#1}%
         \hypertarget{Agda\theAgdaIndex}{}%
        }%
    }

    \newcommand{\AgdaTarget}[1]{\forcsvlist{\AgdaTargetHelper}{#1}}

    \newcommand{\AgdaLink}[1]{%
      \AgdaLookup{#1}%
        {\hyperlink{Agda\theAgdaIndex}{#1}}%
        {#1}%
    }
  }{\PackageError{agda}{Load the hyperref package before the agda package}{}}
\fi

\providecommand{\AgdaTarget}[1]{}
\providecommand{\AgdaLink}[1]{#1}

% ----------------------------------------------------------------------
% Font styles.

\ifxetexorluatex
  \newcommand{\AgdaFontStyle}[1]{\ensuremath{\mathsf{#1}}}
  \ifthenelse{\equal{\AgdaColourScheme}{bw}}{
      \newcommand{\AgdaKeywordFontStyle}[1]{\underline{#1}}
  }{
      \newcommand{\AgdaKeywordFontStyle}[1]{\ensuremath{\mathsf{#1}}}
  }
  \newcommand{\AgdaStringFontStyle}[1]{\ensuremath{\texttt{#1}}}
  \newcommand{\AgdaCommentFontStyle}[1]{\ensuremath{\texttt{#1}}}
  \newcommand{\AgdaBoundFontStyle}[1]{\ensuremath{\mathit{#1}}}

\else
  \newcommand{\AgdaFontStyle}[1]{\textsf{#1}}
  \ifthenelse{\equal{\AgdaColourScheme}{bw}}{
      \newcommand{\AgdaKeywordFontStyle}[1]{\underline{#1}}
  }{
      \newcommand{\AgdaKeywordFontStyle}[1]{\textsf{#1}}
  }
  \newcommand{\AgdaStringFontStyle}[1]{\texttt{#1}}
  \newcommand{\AgdaCommentFontStyle}[1]{\texttt{#1}}
  \newcommand{\AgdaBoundFontStyle}[1]{\textit{#1}}
\fi

% ----------------------------------------------------------------------
% Colours.

% ----------------------------------
% The black and white colour scheme.
\ifthenelse{\equal{\AgdaColourScheme}{bw}}{

    % Aspect colours.
    \definecolor{AgdaComment}      {HTML}{000000}
    \definecolor{AgdaOption}       {HTML}{000000}
    \definecolor{AgdaKeyword}      {HTML}{000000}
    \definecolor{AgdaString}       {HTML}{000000}
    \definecolor{AgdaNumber}       {HTML}{000000}
    \definecolor{AgdaSymbol}       {HTML}{000000}
    \definecolor{AgdaPrimitiveType}{HTML}{000000}
    \definecolor{AgdaOperator}     {HTML}{000000}

    % NameKind colours.
    \definecolor{AgdaBound}                 {HTML}{000000}
    \definecolor{AgdaInductiveConstructor}  {HTML}{000000}
    \definecolor{AgdaCoinductiveConstructor}{HTML}{000000}
    \definecolor{AgdaDatatype}              {HTML}{000000}
    \definecolor{AgdaField}                 {HTML}{000000}
    \definecolor{AgdaFunction}              {HTML}{000000}
    \definecolor{AgdaMacro}                 {HTML}{000000}
    \definecolor{AgdaModule}                {HTML}{000000}
    \definecolor{AgdaPostulate}             {HTML}{000000}
    \definecolor{AgdaPrimitive}             {HTML}{000000}
    \definecolor{AgdaRecord}                {HTML}{000000}
    \definecolor{AgdaArgument}              {HTML}{000000}

    % Other aspect colours.
    \definecolor{AgdaDottedPattern}     {HTML}{000000}
    \definecolor{AgdaUnsolvedMeta}      {HTML}{D3D3D3}
    \definecolor{AgdaTerminationProblem}{HTML}{BEBEBE}
    \definecolor{AgdaIncompletePattern} {HTML}{D3D3D3}
    \definecolor{AgdaError}             {HTML}{696969}

    % Misc.
    \definecolor{AgdaHole}              {HTML}{BEBEBE}

% ----------------------------------
% Conor McBride's colour scheme.
}{ \ifthenelse{\equal{\AgdaColourScheme}{conor}}{

    % Aspect colours.
    \definecolor{AgdaComment}      {HTML}{B22222}
    \definecolor{AgdaOption}       {HTML}{000000}
    \definecolor{AgdaKeyword}      {HTML}{000000}
    \definecolor{AgdaString}       {HTML}{000000}
    \definecolor{AgdaNumber}       {HTML}{000000}
    \definecolor{AgdaSymbol}       {HTML}{000000}
    \definecolor{AgdaPrimitiveType}{HTML}{0000CD}
    \definecolor{AgdaOperator}     {HTML}{000000}

    % NameKind colours.
    \definecolor{AgdaBound}                 {HTML}{A020F0}
    \definecolor{AgdaInductiveConstructor}  {HTML}{8B0000}
    \definecolor{AgdaCoinductiveConstructor}{HTML}{8B0000}
    \definecolor{AgdaDatatype}              {HTML}{0000CD}
    \definecolor{AgdaField}                 {HTML}{8B0000}
    \definecolor{AgdaFunction}              {HTML}{006400}
    \definecolor{AgdaMacro}                 {HTML}{006400}
    \definecolor{AgdaModule}                {HTML}{006400}
    \definecolor{AgdaPostulate}             {HTML}{006400}
    \definecolor{AgdaPrimitive}             {HTML}{006400}
    \definecolor{AgdaRecord}                {HTML}{0000CD}
    \definecolor{AgdaArgument}              {HTML}{404040}

    % Other aspect colours.
    \definecolor{AgdaDottedPattern}     {HTML}{000000}
    \definecolor{AgdaUnsolvedMeta}      {HTML}{FFD700}
    \definecolor{AgdaTerminationProblem}{HTML}{FF0000}
    \definecolor{AgdaIncompletePattern} {HTML}{A020F0}
    \definecolor{AgdaError}             {HTML}{F4A460}

    % Misc.
    \definecolor{AgdaHole}              {HTML}{9DFF9D}

% ----------------------------------
% The standard colour scheme.
}{
    % Aspect colours.
    \definecolor{AgdaComment}      {HTML}{B22222}
    \definecolor{AgdaOption}       {HTML}{000000}
    \definecolor{AgdaKeyword}      {HTML}{CD6600}
    \definecolor{AgdaString}       {HTML}{B22222}
    \definecolor{AgdaNumber}       {HTML}{A020F0}
    \definecolor{AgdaSymbol}       {HTML}{404040}
    \definecolor{AgdaPrimitiveType}{HTML}{0000CD}
    \definecolor{AgdaOperator}     {HTML}{000000}

    % NameKind colours.
    \definecolor{AgdaBound}                 {HTML}{000000}
    \definecolor{AgdaInductiveConstructor}  {HTML}{008B00}
    \definecolor{AgdaCoinductiveConstructor}{HTML}{8B7500}
    \definecolor{AgdaDatatype}              {HTML}{0000CD}
    \definecolor{AgdaField}                 {HTML}{EE1289}
    \definecolor{AgdaFunction}              {HTML}{0000CD}
    \definecolor{AgdaMacro}                 {HTML}{458B74}
    \definecolor{AgdaModule}                {HTML}{A020F0}
    \definecolor{AgdaPostulate}             {HTML}{0000CD}
    \definecolor{AgdaPrimitive}             {HTML}{0000CD}
    \definecolor{AgdaRecord}                {HTML}{0000CD}
    \definecolor{AgdaArgument}              {HTML}{404040}

    % Other aspect colours.
    \definecolor{AgdaDottedPattern}     {HTML}{000000}
    \definecolor{AgdaUnsolvedMeta}      {HTML}{FFFF00}
    \definecolor{AgdaTerminationProblem}{HTML}{FFA07A}
    \definecolor{AgdaIncompletePattern} {HTML}{F5DEB3}
    \definecolor{AgdaError}             {HTML}{FF0000}

    % Misc.
    \definecolor{AgdaHole}              {HTML}{9DFF9D}
}}

% ----------------------------------------------------------------------
% Commands.

\newcommand{\AgdaNoSpaceMath}[1]
    {\begingroup\thickmuskip=0mu\medmuskip=0mu#1\endgroup}

% Aspect commands.
\newcommand{\AgdaComment}     [1]
    {\AgdaNoSpaceMath{\AgdaCommentFontStyle{\textcolor{AgdaComment}{#1}}}}
\newcommand{\AgdaOption}      [1]
    {\AgdaNoSpaceMath{\AgdaCommentFontStyle{\textcolor{AgdaOption}{#1}}}}
\newcommand{\AgdaKeyword}     [1]
    {\AgdaNoSpaceMath{\AgdaKeywordFontStyle{\textcolor{AgdaKeyword}{#1}}}}
\newcommand{\AgdaString}      [1]
    {\AgdaNoSpaceMath{\AgdaStringFontStyle{\textcolor{AgdaString}{#1}}}}
\newcommand{\AgdaNumber}      [1]
    {\AgdaNoSpaceMath{\AgdaFontStyle{\textcolor{AgdaNumber}{#1}}}}
\newcommand{\AgdaSymbol}      [1]
    {\AgdaNoSpaceMath{\AgdaFontStyle{\textcolor{AgdaSymbol}{#1}}}}
\newcommand{\AgdaPrimitiveType}[1]
    {\AgdaNoSpaceMath{\AgdaFontStyle{\textcolor{AgdaPrimitiveType}{#1}}}}
\newcommand{\AgdaOperator}    [1]
    {\AgdaNoSpaceMath{\AgdaFontStyle{\textcolor{AgdaOperator}{#1}}}}

% NameKind commands.

% The user can control the typesetting of (certain) individual tokens
% by redefining the following command. The first argument is the token
% and the second argument the thing to be typeset (sometimes just the
% token, sometimes \AgdaLink{<the token>}). Example:
%
%   \usepackage{ifthen}
%
%   % Insert extra space before some tokens.
%   \DeclareRobustCommand{\AgdaFormat}[2]{%
%     \ifthenelse{
%       \equal{#1}{≡⟨} \OR
%       \equal{#1}{≡⟨⟩} \OR
%       \equal{#1}{∎}
%     }{\ }{}#2}
%
% Note the use of \DeclareRobustCommand.

\newcommand{\AgdaFormat}[2]{#2}

\newcommand{\AgdaBound}[1]
    {\AgdaNoSpaceMath{\AgdaBoundFontStyle{\textcolor{AgdaBound}{\AgdaFormat{#1}{#1}}}}}
\newcommand{\AgdaInductiveConstructor}[1]
    {\AgdaNoSpaceMath{\AgdaFontStyle{\textcolor{AgdaInductiveConstructor}{\AgdaFormat{#1}{\AgdaLink{#1}}}}}}
\newcommand{\AgdaCoinductiveConstructor}[1]
    {\AgdaNoSpaceMath{\AgdaFontStyle{\textcolor{AgdaCoinductiveConstructor}{\AgdaFormat{#1}{\AgdaLink{#1}}}}}}
\newcommand{\AgdaDatatype}[1]
    {\AgdaNoSpaceMath{\AgdaFontStyle{\textcolor{AgdaDatatype}{\AgdaFormat{#1}{\AgdaLink{#1}}}}}}
\newcommand{\AgdaField}[1]
    {\AgdaNoSpaceMath{\AgdaFontStyle{\textcolor{AgdaField}{\AgdaFormat{#1}{\AgdaLink{#1}}}}}}
\newcommand{\AgdaFunction}[1]
    {\AgdaNoSpaceMath{\AgdaFontStyle{\textcolor{AgdaFunction}{\AgdaFormat{#1}{\AgdaLink{#1}}}}}}
\newcommand{\AgdaMacro}[1]
    {\AgdaNoSpaceMath{\AgdaFontStyle{\textcolor{AgdaMacro}{\AgdaFormat{#1}{\AgdaLink{#1}}}}}}
\newcommand{\AgdaModule}[1]
    {\AgdaNoSpaceMath{\AgdaFontStyle{\textcolor{AgdaModule}{\AgdaFormat{#1}{\AgdaLink{#1}}}}}}
\newcommand{\AgdaPostulate}[1]
    {\AgdaNoSpaceMath{\AgdaFontStyle{\textcolor{AgdaPostulate}{\AgdaFormat{#1}{\AgdaLink{#1}}}}}}
\newcommand{\AgdaPrimitive}[1]
    {\AgdaNoSpaceMath{\AgdaFontStyle{\textcolor{AgdaPrimitive}{\AgdaFormat{#1}{#1}}}}}
\newcommand{\AgdaRecord}[1]
    {\AgdaNoSpaceMath{\AgdaFontStyle{\textcolor{AgdaRecord}{\AgdaFormat{#1}{\AgdaLink{#1}}}}}}
\newcommand{\AgdaArgument}[1]
    {\AgdaNoSpaceMath{\AgdaBoundFontStyle{\textcolor{AgdaArgument}{\AgdaFormat{#1}{#1}}}}}

% Other aspect commands.
\newcommand{\AgdaFixityOp}          [1]{\AgdaNoSpaceMath{$#1$}}
\newcommand{\AgdaDottedPattern}     [1]{\textcolor{AgdaDottedPattern}{#1}}
\newcommand{\AgdaUnsolvedMeta}      [1]
    {\AgdaFontStyle{\colorbox{AgdaUnsolvedMeta}{#1}}}
\newcommand{\AgdaTerminationProblem}[1]
    {\AgdaFontStyle{\colorbox{AgdaTerminationProblem}{#1}}}
\newcommand{\AgdaIncompletePattern} [1]{\colorbox{AgdaIncompletePattern}{#1}}
\newcommand{\AgdaError}             [1]
    {\AgdaFontStyle{\textcolor{AgdaError}{\underline{#1}}}}

% Misc.
\newcommand{\AgdaHole}[1]{\colorbox{AgdaHole}{#1}}
\long\def\AgdaHide#1{\ignorespaces} % Used to hide code from LaTeX.

% ----------------------------------------------------------------------
% The code environment.

\newcommand{\AgdaCodeStyle}{}
% \newcommand{\AgdaCodeStyle}{\tiny}

\ifdefined\mathindent
  {}
\else
  \newdimen\mathindent\mathindent\leftmargini
\fi

% Adds the given amount of vertical space and starts a new line.
%
% The implementation comes from lhs2TeX's polycode.fmt, written by
% Andres Löh.
\newcommand{\AgdaNewlineWithVerticalSpace}[1]{%
  {\parskip=0pt\parindent=0pt\par\vskip #1\noindent}}

% 0: No space around code. 1: Space around code.
\newcounter{Agda@SpaceAroundCode}

% Use this command to avoid extra space around code blocks.
\newcommand{\AgdaNoSpaceAroundCode}{%
  \setcounter{Agda@SpaceAroundCode}{0}}

% Use this command to include extra space around code blocks.
\newcommand{\AgdaSpaceAroundCode}{%
  \setcounter{Agda@SpaceAroundCode}{1}}

% By default space is inserted around code blocks.
\AgdaSpaceAroundCode{}

% Sometimes one might want to break up a code block into multiple
% pieces, but keep code in different blocks aligned with respect to
% each other. Then one can use the AgdaAlign environment. Example
% usage:
%
%   \begin{AgdaAlign}
%   \begin{code}
%     code
%       code  (more code)
%   \end{code}
%   Explanation...
%   \begin{code}
%     aligned with "code"
%       code  (aligned with (more code))
%   \end{code}
%   \end{AgdaAlign}
%
% Note that AgdaAlign environments should not be nested.
%
% Sometimes one might also want to hide code in the middle of a code
% block. This can be accomplished in the following way:
%
%   \begin{AgdaAlign}
%   \begin{code}
%     visible
%   \end{code}
%   \AgdaHide{
%   \begin{code}
%     hidden
%   \end{code}}
%   \begin{code}
%     visible
%   \end{code}
%   \end{AgdaAlign}
%
% However, the result may be ugly: extra space is perhaps inserted
% around the code blocks.
%
% The AgdaSuppressSpace environment ensures that extra space is only
% inserted before the first code block, and after the last one (but
% not if \AgdaNoSpaceAroundCode{} is used).
%
% The environment takes one argument, the number of wrapped code
% blocks (excluding hidden ones). Example usage:
%
%   \begin{AgdaAlign}
%   \begin{code}
%     code
%       more code
%   \end{code}
%   Explanation...
%   \begin{AgdaSuppressSpace}{2}
%   \begin{code}
%     aligned with "code"
%       aligned with "more code"
%   \end{code}
%   \AgdaHide{
%   \begin{code}
%     hidden code
%   \end{code}}
%   \begin{code}
%       also aligned with "more code"
%   \end{code}
%   \end{AgdaSuppressSpace}
%   \end{AgdaAlign}
%
% Note that AgdaSuppressSpace environments should not be nested.
%
% There is also a combined environment, AgdaMultiCode, that combines
% the effects of AgdaAlign and AgdaSuppressSpace.

% 0: AgdaAlign is not active. 1: AgdaAlign is active.
\newcounter{Agda@Align}
\setcounter{Agda@Align}{0}

% The current code block.
\newcounter{Agda@AlignCurrent}

\newcommand{\Agda@AlignStart}{%
  \setcounter{Agda@Align}{1}%
  \setcounter{Agda@AlignCurrent}{1}}

\newcommand{\Agda@AlignEnd}{\setcounter{Agda@Align}{0}}

\newenvironment{AgdaAlign}{%
  \Agda@AlignStart{}}{%
  \Agda@AlignEnd{}%
  \ignorespacesafterend}

% 0: AgdaSuppressSpace is not active. 1: AgdaSuppressSpace is active.
\newcounter{Agda@Suppress}
\setcounter{Agda@Suppress}{0}

% The current code block.
\newcounter{Agda@SuppressCurrent}

% The expected number of code blocks.
\newcounter{Agda@SuppressLast}

\newcommand{\Agda@SuppressStart}[1]{%
  \setcounter{Agda@Suppress}{1}%
  \setcounter{Agda@SuppressLast}{#1}%
  \setcounter{Agda@SuppressCurrent}{1}}

\newcommand{\Agda@SuppressEnd}{\setcounter{Agda@Suppress}{0}}

\newenvironment{AgdaSuppressSpace}[1]{%
  \Agda@SuppressStart{#1}}{%
  \Agda@SuppressEnd{}%
  \ignorespacesafterend}

\newenvironment{AgdaMultiCode}[1]{%
  \Agda@AlignStart{}%
  \Agda@SuppressStart{#1}}{%
  \Agda@SuppressEnd{}%
  \Agda@AlignEnd{}%
  \ignorespacesafterend}

% Vertical space used for empty lines. By default \baselineskip.
\newlength{\AgdaEmptySkip}
\setlength{\AgdaEmptySkip}{\baselineskip}

% Extra space to be inserted for empty lines (the difference between
% \AgdaEmptySkip and \baselineskip). Used internally.
\newlength{\AgdaEmptyExtraSkip}

% The code environment.
%
% The implementation is based on plainhscode in lhs2TeX's
% polycode.fmt, written by Andres Löh.
\newenvironment{code}{%
  \ifthenelse{\value{Agda@SpaceAroundCode} = 0 \or%
              \not \(\value{Agda@Suppress} = 0 \or%
                     \value{Agda@SuppressCurrent} = 1\)}{%
    \AgdaNewlineWithVerticalSpace{0pt}}{%
    \AgdaNewlineWithVerticalSpace{\abovedisplayskip}}%
  \advance\leftskip\mathindent%
  \AgdaCodeStyle%
  \setlength{\AgdaEmptyExtraSkip}{\AgdaEmptySkip - \baselineskip}%
  \pboxed%
  \ifthenelse{\value{Agda@Align} = 0}{}{%
    \ifthenelse{\value{Agda@AlignCurrent} = 1}{%
      \savecolumns}{%
      \restorecolumns}}}{%
  \endpboxed%
  \ifthenelse{\value{Agda@SpaceAroundCode} = 0 \or%
              \not \(\value{Agda@Suppress} = 0 \or%
                     \value{Agda@SuppressCurrent} =%
                     \value{Agda@SuppressLast}\)}{%
    \AgdaNewlineWithVerticalSpace{0pt}}{%
    \AgdaNewlineWithVerticalSpace{\belowdisplayskip}}%
  \stepcounter{Agda@AlignCurrent}%
  \stepcounter{Agda@SuppressCurrent}%
  \ignorespacesafterend}

% Space inserted after tokens.
\newcommand{\AgdaSpace}{ }

% Space inserted to indent something.
\newcommand{\AgdaIndentSpace}{\AgdaSpace{}$\;\;$}

% Default column for polytable.
\defaultcolumn{@{}l@{\AgdaSpace{}}}

% \AgdaIndent expects a non-negative integer as its only argument.
% This integer should be the distance, in code blocks, to the thing
% relative to which the text is indented.
%
% The default implementation only indents if the thing that the text
% is indented relative to exists in the same code block or is wrapped
% in the same AgdaAlign or AgdaMultiCode environment.
\newcommand{\AgdaIndent}[1]{%
  \ifthenelse{#1 = 0
                \OR
              \( \value{Agda@Align} = 1
                   \AND
                 #1 < \value{Agda@AlignCurrent}
              \)}{\AgdaIndentSpace{}}{}}

\endinput