%
% lltjp-listings.sty
%

\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{lltjp-listings}[2014/01/09 Patch to listings for LuaTeX-ja]
\RequirePackage{listings,luatexbase-cctb}

%%%%%%%%%%%%%%%% Japanese support
%% IVS support
\newif\if@ltj@lst@vsraw \@ltj@lst@vsrawfalse
\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#1\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{%
  \ifx\@empty#1\else\ltj@lst@hss#1\expandafter\lst@FillFixed@\fi}

\directlua{
  local cat_str = luatexbase.catcodetables['string']
  local cat_lp  = luatexbase.catcodetables['latex-package']
  local ubyte = unicode.utf8.byte
  luatexja.lst = {}
  function luatexja.lst.althss(t)
    t = ubyte(t)
    if not (t>=0xE0100 and t<0xE01F0) then
      tex.sprint(cat_lp, string.char(0x5C) .. 'lst@hss')
    end
  end
}
\gdef\ltj@lst@hss@ivs#1{%
  \directlua{luatexja.lst.althss('\luatexluaescapestring{#1}')}#1%
}

% 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}

\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}

% 漢字用異体字セレクタ命令
\def\ltj@lst@ProcessIVS#1{%
  \lst@whitespacefalse
  \if@ltj@lst@vsraw
    \lst@Append#1\advance\lst@length\m@ne
  \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
}


% 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{917760}{917999}{\ltj@lst@ProcessIVS}
\xdef\ltj@@listing@jpcmd{\the\@temptokena}\@temptokena{}

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

% 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
}}


% hook!
\lst@AddToHook{Init}{
  \luatexcatcodetable\CatcodeTableLTJlistings\ltj@@listing@jpcmd
  \lccode`\~="FFFFF\lowercase{\def~{\ltj@lst@ProcessJALetter}}%"
  \directlua{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 > 0x80 and tex.getcatcode(cu) \string~= 13 then
          ret = ret .. utf.char(1048575) % U+FFFFF
        end
        ret = ret .. c
      end
      return ret
    end, 'ltj.listings_unicode', 1)}%
  \if@ltj@lst@vsraw
    \let\ltj@lst@hss=\ltj@lst@hss@ivs
  \else
    \let\ltj@lst@hss=\lst@hss
  \fi
}
\lst@AddToHook{ExitVars}{%
  \directlua{luatexbase.remove_from_callback('process_input_buffer', 
    'ltj.listings_unicode')}%
}


% 白線対策
\def\lst@OutputToken{%
    \lst@TrackNewLines \lst@OutputLostSpace
    \lst@ifgobbledws
        \lst@gobbledwhitespacefalse
        \lst@@discretionary
    \fi
    \lst@CheckMerge
    {\lst@thestyle{\lst@FontAdjust
     \setbox\@tempboxa\lst@hbox
        {\lsthk@OutputBox
         \lst@lefthss
         \expandafter\lst@FillOutputBox\the\lst@token\@empty
         \lst@righthss}%
     \ht\@tempboxa=0pt\dp\@tempboxa=0pt
     \lst@CalcLostSpaceAndOutput}}%
    \lst@ResetToken}

%%%%%%%%%%%%%%%% 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
         #3\catcode"FFFFF=9\lst@escapebegin%"
         \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}
    \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