%
% lltjp-listings.sty 2025-04-01
%

\NeedsTeXFormat{LaTeX2e}
\RequirePackage{etoolbox,listings,luatexbase-cctb}

\newcount\ltj@lst@japanese@min \ltj@lst@japanese@min=128
%%%%%%%%%%%%%%%% Japanese support
%% whether letter-space in a fixed mode box is doubled or not
\newif\if@ltj@lst@double
\lst@Key{doubleletterspace}f[t]{\lstKV@SetIf{#1}\if@ltj@lst@double}

%% IVS support
\newif\if@ltj@lst@vsraw
\def\ltj@lst@vscmd{}
\lst@Key{vsraw}f[t]{\lstKV@SetIf{#1}\if@ltj@lst@vsraw}
\lst@Key{vscmd}\relax{\def\ltj@lst@vscmd{#1}}

% 既定の IVS 出力コマンド
\def\ltjlistingsvsstdcmd#1{\@tempdima=\f@size pt%
  \smash{\raisebox{.35\@tempdima}{\tt%
    \fboxsep=.1\@tempdima\fbox{\fontsize{.5\@tempdima}{\z@}\selectfont
      \oalign{\hss VS\hss\crcr\hss#1\hss\crcr}}}}}
\def\ltj@lst@vscmd{\ltjlistingsvsstdcmd}

% override \lst@FillFixed@
% \ltj@hst@hss is \ltj@lst@hss@ivs or \ltj@lst@hss@normal,
% according to vsraw = true or not.
\def\lst@FillFixed#1{{\null#1\null}\lst@FillFixed@}
\def\lst@FillFixed@#1{%
  \ifx\@empty#1\else\ltj@lst@hss{\null#1\null}\expandafter\lst@FillFixed@\fi}
\let\lst@FillOutputBox\lst@FillFixed
% [space/full]flexiblemode (not much useful...)
\def\ltj@lst@FillFlex#1\@empty{\null#1\null}
\patchcmd\lst@column@flexible
  {\let\lst@FillOutputBox\@empty}{\let\lst@FillOutputBox\ltj@lst@FillFlex}{}{}
\patchcmd\lst@column@fullflexible
  {\let\lst@FillOutputBox\@empty}{\let\lst@FillOutputBox\ltj@lst@FillFlex}{}{}
\patchcmd\lst@column@spaceflexible
  {\let\lst@FillOutputBox\@empty}{\let\lst@FillOutputBox\ltj@lst@FillFlex}{}{}


\directlua{
  local cat_str = luatexbase.catcodetables['string']
  local cat_lp  = luatexbase.catcodetables['latex-package']
  local ubyte = utf.byte
  local spccmd = string.char(0x5C) .. 'ltj@lst@hss@normal'
  luatexja.listings = {}
  function luatexja.listings.althss(t)
    t = ubyte(t)
    if not (t>=0xE0100 and t<0xE01F0) then
      tex.sprint(cat_lp, spccmd)
    end
  end
}
\def\ltj@lst@hss@ivs#1{%
  \directlua{luatexja.listings.althss('\luatexluaescapestring{#1}')}#1%
}
\def\ltj@lst@hss@double{\lst@hss\lst@hss}

% lowest level
\newif\if@ltj@lst@kanji
\lst@AddToHook{InitVars}{\@ltj@lst@kanjifalse}

\def\lst@AppendLetter{%
    \ltj@lst@setletterflag\lst@Append}
\def\lst@AppendOther{%
    \lst@ifletter\lst@Output\lst@letterfalse\fi\@ltj@lst@kanjifalse
    \futurelet\lst@lastother\lst@Append}

\def\ltj@lst@setletterflag{%
  \lst@ifletter
    \if@ltj@lst@kanji\lst@Output\@ltj@lst@kanjifalse\fi
  \else
    \lst@lettertrue\if@ltj@lst@kanji\@ltj@lst@kanjifalse\else\lst@OutputOther\fi
  \fi}

\def\ltj@lst@setkanjiflag{%
  \lst@ifletter
    \lst@Output
  \else
    \if@ltj@lst@kanji\else\lst@OutputOther\fi\lst@lettertrue
  \fi\@ltj@lst@kanjitrue}

\def\ltj@lst@setopenflag{%
  \lst@ifletter
    \lst@letterfalse\lst@Output
  \else
    \if@ltj@lst@kanji\else\lst@OutputOther\fi
  \fi\@ltj@lst@kanjitrue}

\def\ltj@lst@setcloseflag{%
  \lst@ifletter\else\lst@lettertrue\fi\@ltj@lst@kanjitrue}

% Processing Japanese characters
\def\ltj@lst@ProcessJALetter#1{%
  \lst@whitespacefalse
  \ifnum\ltjgetparameter{jacharrange}{\ltjgetparameter{chartorange}{`#1}}=0
    \ifnum\ltjgetparameter{postbreakpenalty}{`#1}>0
      \ltj@lst@setopenflag    % 開き括弧類
    \else
      \ifnum\ltjgetparameter{prebreakpenalty}{`#1}>0
        \ltj@lst@setcloseflag % 閉じ括弧類，句読点
      \else
        \ltj@lst@setkanjiflag % 通常の和文文字
    \fi\fi
    \advance\lst@length\@ne   % 和文文字は通常の2倍の幅
  \else
    \ltj@lst@setletterflag
  \fi
  \lst@Append#1%
}

% 半角カナ処理命令
\def\ltj@lst@ProcessJALetterHalf#1{%
  \lst@whitespacefalse
  \ifnum\ltjgetparameter{jacharrange}{\ltjgetparameter{chartorange}{`#1}}=0
    \ifnum\ltjgetparameter{postbreakpenalty}{`#1}>0
      \ltj@lst@setopenflag    % 開き括弧類
    \else
      \ifnum\ltjgetparameter{prebreakpenalty}{`#1}>0
        \ltj@lst@setcloseflag % 閉じ括弧類
      \else
        \ltj@lst@setkanjiflag % 通常の和文文字
    \fi\fi
    % 半角カナは欧文文字と同じ幅
  \else
    \ltj@lst@setletterflag
  \fi
  \lst@Append#1}

%
\def\ltj@lst@Append@ivs#1{%
% \lst@token: ABC...DE ==> ABC...D{E#1}
  \@temptokena{}\def\@@tempa{}%
  \expandafter\ltj@lst@Append@ivs@\the\lst@token\@empty\@empty
  \lst@token\@temptokena%
  \edef\@@tempa{{\@@tempa#1}}%
  \lst@token\expandafter\expandafter\expandafter\expandafter%
  \expandafter\expandafter\expandafter{\expandafter\expandafter%
  \expandafter\the\expandafter\lst@token\@@tempa}%
}
\def\ltj@lst@Append@ivs@#1#2{%
  \@temptokena\expandafter\expandafter\expandafter\expandafter%
  \expandafter\expandafter\expandafter{\expandafter\expandafter%
  \expandafter\the\expandafter\@temptokena\@@tempa}\def\@@tempa{#1}%
  \ifx#2\@empty\else
  \expandafter\expandafter\expandafter\ltj@lst@Append@ivs@\expandafter#2\fi
}

% 漢字用異体字セレクタ命令
\def\ltj@lst@ProcessIVS#1{%
  \lst@whitespacefalse
  \if@ltj@lst@vsraw
    \ltj@lst@Append@ivs#1%
  \else
    \lst@TrackNewLines\lst@OutputLostSpace \lst@PrintToken
    \setbox\@tempboxa\hbox to 2\lst@width{\hss
       \expandafter\expandafter\expandafter\ltj@lst@vscmd
       \expandafter{\the\numexpr`#1-"E00EF\relax}%"
    \hss}%
    \lst@CalcLostSpaceAndOutput\lst@whitespacefalse
  \fi
}

% Variation Selector
\def\ltj@lst@ProcessVS#1{%
  \lst@whitespacefalse
  \if@ltj@lst@vsraw
    \ltj@lst@Append@ivs#1%
  \else
    \lst@TrackNewLines\lst@OutputLostSpace \lst@PrintToken
    \setbox\@tempboxa\hbox to 2\lst@width{\hss
       \expandafter\expandafter\expandafter\ltj@lst@vscmd
       \expandafter{\the\numexpr`#1-"FDFF\relax}%"
    \hss}%
    \lst@CalcLostSpaceAndOutput\lst@whitespacefalse
  \fi
}


% 半角カナ，異体字セレクタはアクティブ化
\def\ltj@@listing@jpsetN#1#2#3{% for (not large) range
  \@tempcnta=\numexpr#1-1\relax\@tempcntb=\numexpr 1+#2\relax
  \loop \global\advance\@tempcnta\@ne\ifnum\@tempcnta<\@tempcntb\relax
    \ltj@@listing@jpsetN@{\@tempcnta}{#3}\repeat
}

\def\ltj@@listing@jpsetN@#1#2{{%
    \@tempcnta=#1 \lccode`\~=\@tempcnta \lccode`\/=\@tempcnta
    \lowercase{\gdef\@temp{\gdef~{#2/}}}}%
  \@temptokena\expandafter\expandafter\expandafter\expandafter%
  \expandafter\expandafter\expandafter{\expandafter\expandafter%
  \expandafter\the\expandafter\@temptokena\@temp}%
}
\@temptokena{}
\ltj@@listing@jpsetN{65377}{65439}{\ltj@lst@ProcessJALetterHalf}
\ltj@@listing@jpsetN{65024}{65039}{\ltj@lst@ProcessVS}
\ltj@@listing@jpsetN{917760}{917999}{\ltj@lst@ProcessIVS}
\xdef\ltj@@listing@jpcmd{\the\@temptokena}\@temptokena{}

% catcode 対策
\newluatexcatcodetable\CatcodeTableLTJlistings
\setluatexcatcodetable\CatcodeTableLTJlistings{%
  \luatexcatcodetable\CatcodeTableLaTeXAtLetter
  \catcode\ltjlineendcomment=13%"
  \SetCatcodeRange{"FF61}{"FF9F}{13}%     半角カナ
  \SetCatcodeRange{"E0100}{"E01EF}{13}%   漢字用異体字セレクタ
  \SetCatcodeRange{"FE00}{"FE0F}{13}%     Variation Selector
}

% redefine \lstinline and its inner commands to support Japanese characters
\renewcommand\lstinline[1][]{%
    \leavevmode\bgroup % \hbox\bgroup --> \bgroup
      \def\lst@boxpos{b}%
      \lsthk@PreSet\lstset{flexiblecolumns,#1}%
      \lsthk@TextStyle
      \@ifnextchar\bgroup \ltj@lst@InlineG \ltj@lstinline@}
\def\ltj@lst@InlineG{%
  \lst@Init\relax\edef\ltj@lst@temp{\the\catcode`\}}\catcode`\}=2 \catcode`\ =12\relax
  \let\lst@arg\@empty\afterassignment\ltj@lst@InlineG@@\@temptokena}
\def\ltj@lst@InlineG@@{%
  \catcode`\}=\ltj@lst@temp%
  \expandafter\expandafter\expandafter\lst@InsideConvert%
  \expandafter{\the\@temptokena}\lst@arg\lst@DeInit\egroup}
\def\ltj@lstinline@#1{%
  \edef\ltj@lst@temp{\the\catcode`#1}%
  \lst@Init\relax\catcode`#1\ltj@lst@temp
  \ifnum\ltj@lst@temp=\active
    \begingroup\lccode`\~=`#1\relax
    \lowercase{\xdef\lst@next{\noexpand\lst@InlineJ\noexpand~}}\endgroup%
  \else
    \edef\lst@next{\noexpand\lst@InlineJ\scantextokens{#1}}%
  \fi\lst@next
}

% We redefine \lst@BeginDropInput, since now we have
% two additional `process macros'.
\def\lst@BeginDropInput#1{%
    \lst@EnterMode{#1}%
    {\lst@modetrue
     \let\lst@OutputBox\@gobble
     \let\lst@ifdropinput\iftrue
     \let\lst@ProcessLetter\@gobble
     \let\lst@ProcessDigit\@gobble
     \let\lst@ProcessOther\@gobble
     \let\lst@ProcessSpace\@empty
     \let\lst@ProcessTabulator\@empty
     \let\lst@ProcessFormFeed\@empty
     \let\ltj@lst@ProcessJALetter\@gobble     % added
     \let\ltj@lst@ProcessJALetterHalf\@gobble % added
}}

\directlua{
  local utfchar, getcount = utf.char, tex.getcount
  luatexja.listings.insert_cb = function()
    if not luatexja.listings.patched then
      luatexja.listings.patched = 1
      luatexbase.add_to_callback('process_input_buffer',
         function(buf)
           local ret = ''
           for i = 1, utf.len(buf) do
              local c = utf.sub(buf, i, i)
              local cu = utf.byte(c)
              if cu >= \the\ltj@lst@japanese@min\space and tex.getcatcode(cu) \string~= 13 then
                ret = ret .. utfchar(getcount('ltjlineendcomment'))
              end
              ret = ret .. c
            end
            return ret
          end, 'ltj.listings_unicode', 1)
    end
  end
  luatexja.listings.remove_cb = function()
    if luatexja.listings.patched then
      luatexja.listings.patched = nil
      luatexbase.remove_from_callback('process_input_buffer', 
        'ltj.listings_unicode')%
    end
  end}

% hook!
\lst@AddToHook{Init}{%
  \luatexcatcodetable\CatcodeTableLTJlistings\ltj@@listing@jpcmd
  \lccode`\~=\ltjlineendcomment\lowercase{\def~{\ltj@lst@ProcessJALetter}}%"
  \directlua{luatexja.listings.insert_cb()}%
  \if@ltj@lst@double
    \let\ltj@lst@hss@normal=\ltj@lst@hss@double
  \else
    \let\ltj@lst@hss@normal=\lst@hss
  \fi
  \if@ltj@lst@vsraw
    \let\ltj@lst@hss=\ltj@lst@hss@ivs
  \else
    \let\ltj@lst@hss=\ltj@lst@hss@normal
  \fi
}

\def\ltj@lst@MakeActive#1{%
    \let\lst@temp\@empty \ltj@lst@MakeActive@#1\relax}
\begingroup
\catcode`\^^A=12
\catcode`\^^@=\active
\lccode`\$=\ltjlineendcomment \catcode`\$=13 %"
\lowercase{%
\gdef\ltj@lst@MakeActive@#1{\let\lst@next\relax%
    \ifx#1\relax
    \else\let\lst@next\ltj@lst@MakeActive@
    \ifnum`#1>\numexpr\ltj@lst@japanese@min-1
      \lccode`\^^A=`#1 
      \lowercase{\lst@lAddTo\lst@temp{$^^A}}%$
    \else
      \lccode`\^^@=`#1 
      \lowercase{\lst@lAddTo\lst@temp{^^@}}%
    \fi\fi\lst@next}}
\endgroup


\begingroup \lccode`\~=`\ \relax \lowercase{%
\gdef\lst@InsideConvert@#1 #2{%
    \ltj@lst@MakeActive{#1}%
    \ifx\@empty#2%
        \lst@lExtend\lst@arg{\lst@temp}%
    \else
        \lst@lExtend\lst@arg{\lst@temp~}%
        \expandafter\lst@InsideConvert@
    \fi#2}
}\endgroup

\lst@AddToHook{ExitVars}{%
  \directlua{luatexja.listings.remove_cb()}%
}

% 白線対策
\newif\ifltj@lst@frame@top
\newdimen\ltj@lst@frame@lslimit
\gdef\lst@frameInit{%
    \ltj@lst@frame@toptrue
    \ifx\lst@framelshape\@empty \let\lst@frameL\@empty \fi
    \ifx\lst@framershape\@empty \let\lst@frameR\@empty \fi
    \def\lst@framevrule{\vrule\@width\lst@framerulewidth\relax}%
    \lst@ifframeround
        \lst@frameCalcDimA\z@ \@getcirc\@tempdima
        \@tempdimb\@tempdima \divide\@tempdimb\tw@
        \advance\@tempdimb -\@wholewidth
        \edef\lst@frametextsep{\the\@tempdimb}%
        \edef\lst@framerulewidth{\the\@wholewidth}%
        \lst@frameCalcDimA\@ne \@getcirc\@tempdima
        \@tempdimb\@tempdima \divide\@tempdimb\tw@
        \advance\@tempdimb -\tw@\@wholewidth
        \advance\@tempdimb -\lst@frametextsep
        \edef\lst@rulesep{\the\@tempdimb}%
    \fi
    \lst@frameMakeBoxV\lst@framebox{\ht\strutbox}{\dp\strutbox}%
    %%%%  ここから
    \@tempdima\z@
    \ifdim\ht\strutbox<\cht\@tempdima=\dimexpr\cht-\ht\strutbox\relax\fi
    \ifdim\dp\strutbox<\cdp\@tempdima=\dimexpr\cdp-\dp\strutbox\relax\fi
    \ltj@lst@frame@lslimit=-\@tempdima
    \def\lst@framelr{%
      \ifltj@lst@frame@top\ltj@lst@frame@topfalse\else\lineskiplimit\ltj@lst@frame@lslimit\fi
      \copy\lst@framebox}%
    %%%% ここまで
    \ifx\lst@frametshape\@empty\else
        \lst@frameH T\lst@frametshape
        \ifvoid\z@\else
            \par\lst@parshape
            \@tempdima-\baselineskip \advance\@tempdima\ht\z@
            \ifdim\prevdepth<\@cclvi\p@\else
                \advance\@tempdima\prevdepth
            \fi
            \ifdim\@tempdima<\z@
                \vskip\@tempdima\vskip\lineskip
            \fi
            \noindent\box\z@\par
            \lineskiplimit\maxdimen \lineskip\z@
        \fi
        \lst@frameSpreadV\lst@framextopmargin
    \fi}



%%%%%%%%%%%%%%%% escape to \LaTeX
\lstloadaspects{escape}
\gdef\lst@Escape#1#2#3#4{%
    \lst@CArgX #1\relax\lst@CDefX
        {}%
        {\lst@ifdropinput\else
         \lst@TrackNewLines\lst@OutputLostSpace \lst@XPrintToken
         \lst@InterruptModes
         \lst@EnterMode{\lst@TeXmode}{\lst@modetrue}%
         \ifx\^^M#2%
             \lst@CArg #2\relax\lst@ActiveCDefX
                 {}%
                 {\lst@escapeend #4\lst@LeaveAllModes\lst@ReenterModes}%
                 {\lst@MProcessListing}%
         \else
             \lst@CArg #2\relax\lst@ActiveCDefX
                 {}%
                 {\lst@escapeend #4\lst@LeaveAllModes\lst@ReenterModes
                  \lst@newlines\z@ \lst@whitespacefalse}%
                 {}%
         \fi%
         \ltj@lst@escape@setup#2%
         #3\catcode\ltjlineendcomment=9\lst@escapebegin\expandafter\lst@next%"
         \fi}%
        {}}
\def\ltj@lst@emptygrp{{}}
\def\ltj@lst@escape@setup#1{%
  \begingroup\lccode`\~=`#1\lowercase{%
  \gdef\lst@next##1~{%
     \let\lst@arg\@empty\ltj@lst@remove@jacmd{##1}%
     \expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter
	   \scantokens\expandafter\expandafter\expandafter{\expandafter\ltj@lst@emptygrp\lst@arg\empty}%
     ~}%
  }\endgroup
}
\begingroup
  \lccode`\|=\ltjlineendcomment \lowercase{%"
  \gdef\ltj@lst@remove@jacmd#1{%
    \expandafter\ltj@lst@remove@jacmd@\detokenize{#1}|\@nil|}
  \gdef\ltj@lst@remove@jacmd@#1|{%
    \ifx#1\@nil\else
       \lst@lAddTo\lst@arg{#1}%
       \expandafter\ltj@lst@remove@jacmd@
    \fi}}
\endgroup

%%%%%%%%%%%%%%%% texcl
\lst@AddToHook{AfterBeginComment}
   {\ifnum\lst@mode=\lst@TeXLmode
      \catcode`\^^M=13\relax
      \catcode\ltjlineendcomment=9\relax
    \fi}

%%%%%%%%%%%%%%%%
\lstloadaspects{writefile}
\begingroup \catcode`\^^I=11
\gdef\lst@WFBegin#1#2{%
    \begingroup
    \let\lst@OutputBox#1%
    \def\lst@Append##1{%
        \advance\lst@length\@ne
        \expandafter\lst@token\expandafter{\the\lst@token##1}%
        \ifx ##1\lst@outputspace \else
            \lst@WFAppend##1%
        \fi}%
    \lst@lAddTo\lst@PreGotoTabStop{\lst@WFAppend{^^I}}%
    \lst@lAddTo\lst@ProcessSpace{\lst@WFAppend{ }}%
    \def\ltj@lst@ProcessIVS##1{\lst@whitespacefalse\lst@Append##1}%
    \def\ltj@lst@ProcessVS##1{\lst@whitespacefalse\lst@Append##1}%
    \let\lst@DeInit\lst@WFDeInit
    \let\lst@MProcessListing\lst@WFMProcessListing
    \lst@WFifopen\else
        \immediate\openout\lst@WF=#2\relax
        \global\let\lst@WFifopen\iftrue
        \@gobbletwo\fi\fi
    \fi}
\endgroup

%    \begin{修正事項}{1.3} from jlisting.sty
% ちょっとした修正
\gdef\lst@breakProcessOther#1{\lst@ProcessOther#1}
% ソースコード目次における文字と番号の空き
\let \l@lstlisting = \l@figure

%%%% 
% キャプションとソースコード目次に対する日本語対応
%\def\lstlistingname{ソースコード}
%\def\lstlistlistingname{ソースコード目次}
%    \end{修正事項}
%%%%

\endinput
