% This is the Navigator package.
% Relevant information can be found in navigator-doc.pdf
%
% Author: Paul Isambert.
% E-mail: zappathustra AT free DOT fr
% Comments and suggestions are welcome.
% Date: January 2011.

\ifdefined\NavigatorHasAlreadyBeenLoadedMyDear
  \expandafter\endinput
\fi
\let\NavigatorHasAlreadyBeenLoadedMyDear\relax

\input yax
\ifdim\yaxversion pt<1.03pt
  \senderror{Navigator}{YaX should be at least version 1.03. I quit}%
  \expandafter\endinput
\fi

\ifnum\texenginenumber>1
  \lettocs\ifpdforluatex{iftrue}
\else
  \letcstocs{ifpdforluatex}{iffalse}
\fi
\newsyntax#1:#2;{nav@}
\setcatcodes{_@=11}
\def\nav@error#1{\senderror{Navigator}{#1}}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%% Strings %%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\ifcase\texenginenumber
\or
% XeTeX: we do nothing. Under some circumstances,
% xdvipdfmx writes a good UTF-16 string.
\let\pdfstring\unbrace

\or
% PDFTeX: we escape the string.
\let\pdfstring\pdfescapestring

\or
% LuaTeX: the string is converted from UTF-8 to
% UTF-16, and expressed in octal form (otherwise LuaTeX
% would complain about non-UTF-8 characters). Hexadecimal
% strings may be better, but \pdfoutline encloses the title
% between braces, whereas hexadecimal strings should be
% enclosed between "<" and ">".
%
% The UTF-16 conversion covers the entire Unicode range,
% because one has the right to use Linear-B or musical notations
% in a bookmark, but the viewer is very unlikely to display
% anything beside the basic plane (unless one can change
% the UI's font).

% One could use a catcode table for this, but I don't think
% it's worth it.
{\catcode`\_=0
\catcode`\\=12
_gdef_navbackslash{\}}

\bgroup
\catcode`\%=12
\directlua{
local function to8 (...)
  local arg, str = {...}, ""
  for _, num in ipairs(arg) do
    str = str .. string.format("\noexpand\\navbackslash%.3o", num)
  end
  return str
end
function toutf16(str)
  local result = ""
  for c in string.utfvalues(str) do
    if c < 0x10000 then
      result = result .. to8(c / 256, c % 256)
    else
      c = c - 0x10000
      local a, b = c / 1024 + 0xD800, c % 1024 + 0xDC00
      result = result .. to8(a / 256, a % 256, b / 256, b % 256)
    end
  end
  tex.print([[\noexpand\navbackslash376\noexpand\navbackslash377]] .. result)
end
}
\egroup

\long\def\pdfstring#1{%
  \directlua{toutf16("\luaescapestring{#1}")}%
  }

\fi

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%% Object creation %%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\def\pdfobjectstatus#1{%
  \ifcs{nav@pdfobject:#1}
    {\ifcs{nav@pdfobject_used:#1}{2}{1}}
    {0}%
  }

\def\ifpdfobject#1{%
  \ifcs{nav@pdfobject:#1}%
  }

\def\pdfobject#1#2{%
  \nav@pdfobject{}{}[]{#1}{#2}%
  }

\def\pdfdictobject#1#2{%
  \nav@pdfobject{}{}[]{#1}{<< #2 >>}%
  }

\def\pdfstreamobject{%
  \ifnext[
    {\nav@pdfobject{stream}{}}
    {\nav@pdfobject{stream}{}[]}%
  }

\def\pdffileobject{%
  \ifnext[
    {\nav@pdfobject{stream}{file}}
    {\nav@pdfobject{stream}{file}[]}%
  }

\ifpdforluatex

\def\nav@pdfobject#1#2[#3]#4#5{%
  \ifnum\pdfobjectstatus{#4}=2
    \nav@error{There already exists an object named `#4'}%
  \else
    \immediate\pdfobj
    \ifnum\pdfobjectstatus{#4}=1 useobjnum \pdfobjectnumber{#4}\fi
    #1 % "stream" or nothing.
    \reverse\iffemptystring{#3}{attr {#3} }% "attr {...}" or nothing.
    #2 % "file" or nothing.
    {#5}% Contents.
    \ifnum\pdfobjectstatus{#2}=0
      \xdefcs{nav@pdfobject:#4}{\the\pdflastobj}%
    \fi
    \global\letcs{nav@pdfobject_used:#4}\relax
  \fi
  }

\def\pdfreserveobject#1{%
  \ifcase\pdfobjectstatus{#1}
    \pdfobj reserveobjnum
    \xdefcs{nav@pdfobject:#1}{\the\pdflastobj}%
  \or
    \nav@error{Object `#1' is already reserved}%
  \or
    \nav@error{Object `#1' is already in use}%
  \fi
  }

% An error message here wouldn't reach the terminal
% but would spoil the PDF file instead; therefore
% I prefer to return an unexisting (and impossible)
% object with number 0.

\def\pdfobjectnumber#1{%
  \ifcs{nav@pdfobject:#1}
    {\usecs{nav@pdfobject:#1}}
    {0}%
  }

\def\pdfrefobject#1{%
  \ifcs{nav@pdfobject:#1}
    {\usecs{nav@pdfobject:#1} 0 R}
    {0 0 R}%
  }

\else

\def\nav@pdfobject#1#2[#3]#4#5{%
  \ifnum\pdfobjectstatus{#4}=2
    \nav@error{There already exists an object named `#4'}%
  \else
    \special{pdf:
      \ifemptystring{#1}
        % No matter whether the object has been reserved,
        % it doesn't mean anything with xdvipdfmx.
        {obj \pdfrefobject{#4} #5}
        {\ifemptystring{#2}{stream}{fstream}
         \pdfrefobject{#4} (#5)
         \reverse\iffemptystring{#3}{<< #3 >>}}}%
    % Useless. But so the same behavior can be expected
    % no matter the driver.
    \global\defcs{nav@pdfobject:#4}{@nav_#4}%
    \global\letcs{nav@pdfobject_used:#4}\relax
  \fi
  }

\def\pdfreserveobject#1{%
  \ifcase\pdfobjectstatus{#1}
    % We do absolutely nothing except register the object
    % as ``reserved''.
    \xdefcs{nav@pdfobject:#1}{@nav_#1}%
  \or
    % Stupid, but then the same behavior can be expected
    % across engines.
    \nav@error{Object `#1' is already reserved}%
  \or
    \nav@error{Object `#1' is already in use}%
  \fi
  }

% We can't do anything meaningful here, so we do nothing.
\def\pdfobjectnumber#1{}

% With XeTeX, referencing of unreserved
% object is allowed, because reserving objects is
% dummy behavior anyway. Thus, rather than returning
% an unexisting 0 object, at least there exists the
% possibility that the object will be created later,
% even if it hasn't been reserved yet.
\def\pdfrefobject#1{@nav_#1}

\fi

\def\pdfensureobject#1{%
  \ifpdfobject{#1}{}{\pdfreserveobject{#1}}%
  }

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%% Anchors %%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% REMARK
%
% Here and elsewhere, \usevalueor (or similar) is used (with a default
% value as the or-part), because the user might do something like:
%
% \setparameter param:
%   up = 12pt
%
% \anchor[meta = param]{foo}
%
% Then there is no value for the "left" attribute, since "param"
% doesn't have "navigator" (which holds the user's default values)
% as a meta-parameter.
% If no meta is detected, "navigator" is assigned to meta.

\def\nav@prepare_options#1#2{%
  \setparameterlist{nav@temp}[#1]{#2}%
  \nav@ifattribute nav@temp:meta;
    {}{\nav@setattribute nav@temp:meta; = navigator }%
  }

\def\anchor{%
  \ifnext[
    {\nav@anchor}
    {\nav@anchor[]}%
  }

\def\nav@anchor[#1]#2{%
  \ifcs{nav@pdfanchor:#2}
    {\nav@error{Anchor `#2' already exists}}
    {\global\letcs{nav@pdfanchor:#2}\relax
     \nav@prepare_options{\gobbleone}{#1}%
     \nav@anchor_position{#2}%
     \deleteparameter nav@temp:}%
  }

\def\nav@anchor_position#1{%
  \ifvmode
    \nav@passvalueand{\nav@anchor_pass{nav@pdfanchor:#1}}nav@temp:fit;{{\nav@usevalue nav@temp:zoom;}}
      {\nav@anchor_pass{nav@pdfanchor:#1}{xyz}{}}%
  \else
    \vbox to 0pt{\vss
      \vbox to \nav@usevalueor nav@temp:up;{\baselineskip}{%
        \hbox to 0pt{%
          \kern-\nav@usevalueor nav@temp:left;{0pt}%
          \nav@passvalueand{\nav@anchor_pass{nav@pdfanchor:#1}}nav@temp:fit;{{\nav@usevalue nav@temp:zoom;}}
            {\nav@anchor_pass{nav@pdfanchor:#1}{xyz}{}}\hss}\vss}}%
  \fi
  }

\def\nav@anchor_pass#1#2#3{%
  \lowercase{\nav@anchor_create{#2}}{#1}{#3}%
  }

\ifpdforluatex

\def\nav@anchor_xyz   #1{xyz zoom 0#1}
\def\nav@anchor_fit   #1{fit}
\def\nav@anchor_fith  #1{fith}
\def\nav@anchor_fitv  #1{fitv}
\def\nav@anchor_fitb  #1{fitb}
\def\nav@anchor_fitbh #1{fitbh}
\def\nav@anchor_fitbv #1{fitbv}
\def\nav@anchor_fitr  #1{fitr}

\def\nav@anchor_create#1#2#3{%
  \pdfdest name {#2} \ifcs{nav@anchor_#1}{\usecs{nav@anchor_#1}{#3}}{xyz}%
  }

\else

% FitR is quite unusable with xdvipdfm.
{\setcatcodes{pt=12}\gdef\noPT#1pt{#1}}
\def\nav@anchor_xyz   #1{XYZ   @xpos @ypos \expandafter\noPT\the\dimexpr0#1pt/1000\relax}
\def\nav@anchor_fit   #1{Fit}
\def\nav@anchor_fith  #1{FitH  @ypos}
\def\nav@anchor_fitv  #1{FitV  @xpos}
\def\nav@anchor_fitb  #1{FitB}
\def\nav@anchor_fitbh #1{FitBH @ypos}
\def\nav@anchor_fitbv #1{FitBV @xpos}

\def\nav@anchor_create#1#2#3{%
  \special{pdf: dest (#2)
    [ @thispage /\ifcs{nav@anchor_#1}{\usecs{nav@anchor_#1}{#3}}{XYZ} ]
    }%
  }

\fi

\def\anchorname#1{%
  nav@pdfanchor:#1%
  }

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%% Outlines %%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\def\nav@pdfdef_list{}
\def\pdfdef#1{%
  \global\addright\nav@pdfdef_list{#1}%
  \gdefcs{nav@pdfdef:\commandtoname#1}%
  }

\newfor\nav@pdfdef_loop#1{%
  \lettocs#1{nav@pdfdef:\commandtoname#1}%
  }

\def\outline{%
  \ifnext[
    {\nav@outline}
    {\nav@outline[]}%
  }

\def\nav@outline[#1]#2{%
  \ifnext[
    {\nav@outline_do{#1}{#2}}
    {\nav@outline_do{#1}{#2}[]}%
  }

\newcount\nav@outline_count
\ifpdforluatex

\def\nav@outline_do#1#2[#3]#4{%
  \global\advance\nav@outline_count 1
  \gdefcs{nav@outline_\the\nav@outline_count:specs}{#1,}%
  \gdefcs{nav@outline_\the\nav@outline_count:level}{#2}%
  \gdefcs{nav@outline_\the\nav@outline_count:title}{#4}%
  \nav@prepare_options{\gobbleone}{#1}%
  \nav@outline_getaction{#1}{#3}%
  % It'd be simpler to create one action object anyway and let \nav@outline_n:action
  % refer to it; but then I'd have to use the /NoAction trick (in \nav@outline_getaction), which not all
  % viewers understand; at least here outlines with destinations work.
  \global\xdefcs{nav@outline_\the\nav@outline_count:action}{<< \nav@temp >>}%
  \deleteparameter nav@temp:%
  }

\def\nav@processoutlines{%
  \bgroup
  \passexpanded\nav@pdfdef_loop\nav@pdfdef_list
  \nav@processoutlines_loop{1}%
  \egroup
  }

\newwhile\nav@processoutlines_loop1{#1+1}
  {\straightenif{ifnum}{\numexpr#1>\nav@outline_count}
     {\breakwhile{}}
     {\nav@processoutlines_subloop{#1+1}{#1}{}{0}}%
  }

\newwhile\nav@processoutlines_subloop4{#1+1}{#2}{#3}{#4}
  {\straightenif{ifnum}{\numexpr#1>\nav@outline_count}
      {\breakwhile{\nav@processoutlines_create{#2}{#4}}}
      {\straightenif{ifdim}{\usecs{nav@outline_\the\numexpr#2:level}pt<\usecs{nav@outline_\the\numexpr#1:level}pt\relax}
         {\ifemptystring{#3}
            {\changewhile{#1+1}{#2}{#1}{#4+1}}
            {\reverse\straighteniff{ifdim}{\usecs{nav@outline_\the\numexpr#3:level}pt<\usecs{nav@outline_\the\numexpr#1:level}pt\relax}
               {\changewhile{#1+1}{#2}{#1}{#4+1}}}}
         {\breakwhile{\nav@processoutlines_create{#2}{#4}}}}%
  }

\def\nav@processoutlines_create#1#2{%
  \passexpandedcs{\nav@prepare_options{}}{nav@outline_\the\numexpr#1:specs}%
  \pdfoutline
    attr {\nav@outline_attributes}
    user {\usecs{nav@outline_\the\numexpr#1:action}}
    count \nav@ifvalue nav@temp:open; = true {}{-}\numexpr#2\relax {\pdfstring{\usecs{nav@outline_\the\numexpr#1:title}}}%
  \deleteparameter nav@temp:%
  }

\else
%
% So much simpler because xdvipdfmx deals with children
% automatically; thus \nav@processoutlines is unnecessary.
%

\let\nav@processoutlines\relax

\def\nav@outline_do#1#2[#3]#4{%
  \global\advance\nav@outline_count 1
  \nav@prepare_options{\gobbleone}{#1}%
  \nav@outline_getaction{#1}{#3}%
  \bgroup
  \passexpanded\nav@pdfdef_loop\nav@pdfdef_list
%  
  \special{pdf: out
    [\nav@ifvalue nav@temp:open;=true {}{-}] #2
    << /Title (#4)
       /A << \nav@temp >>
       \nav@outline_attributes >>}%
%
  \egroup
  \deleteparameter nav@temp:%
  }

\fi

\def\nav@outline_getaction#1#2{%
  \nav@storevalueand\nav@temp nav@temp:anchor;
    {\edef\nav@temp{/S/GoTo /D (\anchorname{\nav@temp})}}
    {\nav@storevalueand\nav@temp nav@temp:action;
      {\pdfensureobject{\nav@temp}%
       \edef\nav@temp{/S/Named /N/NoAction /Next \pdfrefobject{\nav@temp}}}
      {\nav@anchor[#1]{\ifemptystring{#2}{outline_\the\nav@outline_count}{#2}}%
       \edef\nav@temp{/S/GoTo /D (\anchorname{\ifemptystring{#2}{outline_\the\nav@outline_count}{#2})}}}}%
  }


\def\nav@outline_attributes{%
  % See REMARK above for default values.
  /C [\nav@usevalueor nav@temp:color;{\nav@usevalueor nav@temp:outlinecolor;{0 0 0}}]
  /F \nav@ifvalue nav@temp:bold; = true {1}{0}\nav@ifvalue nav@temp:italic; = true {1}{0}
  }

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%% Annotations %%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\def\actionlink{%
  \ifnext[
    {\nav@actionlink_do{a}}
    {\nav@actionlink_do{a}[]}%
  }

\def\rawactionlink{%
  \ifnext[
    {\nav@actionlink_do{r}}
    {\nav@actionlink_do{r}[]}%
  }

\def\jumplink{%
  \ifnext[
    {\nav@actionlink_do{d}}
    {\nav@actionlink_do{d}[]}% 
  }

\def\annotation{%
  \ifnext[
    {\nav@actionlink_do{x}}
    {\nav@actionlink_do{x}[]}% 
  }

\def\openfilelink{%
  \ifnext[
    {\nav@openfilelink}
    {\nav@openfilelink[]}%
  }

\def\nav@openfilelink[#1]#2{%
  \ifnext[
    {\nav@openfilelink_do{#1}{#2}}
    {\nav@openfilelink_do{#1}{#2}[0]}%
  }

\def\nav@openfilelink_do#1#2[#3]{%
  \nav@actionlink_do{r}[#1]
    {/S/GoToE /D [\the\numexpr#3-1\relax /Fit] 
     /T << /R/C /N (#2) >> /NewWindow true}%
  }

\long\def\nav@actionlink_do#1[#2]#3#4{%
  \nav@quitvmode
  \nav@prepare_options{}{#2}%
  \iffstring{#1}{a}{\pdfensureobject{#3}}%
  \nav@actionlink_create{#1}{#3}{%
    % Something in pre might be delimited by something in post
    % so post must be passed expanded.
    \nav@passvaluenobracesor{\nav@usevalue nav@temp:pre;#4}nav@temp:post;
      {\nav@usevalue nav@temp:pre;#4}%
    }%
  \deleteparameter nav@temp:%
  }

\ifpdforluatex

\let\nav@quitvmode\quitvmode

\long\def\nav@actionlink_create#1#2#3{%
  \pdfstartlink
  attr {\nav@actionlink_attributes{#1}{#2}}
  user {}%
  #3\pdfendlink
  }

\else

\let\nav@quitvmode\leavevmode

\long\def\nav@actionlink_create#1#2#3{%
  \special{pdf: bannot
    << \nav@actionlink_attributes{#1}{#2} >>}%
    #3\special{pdf: eannot}%
  }

\fi

\def\nav@actionlink_attributes#1#2{%
  /Border [0 0 \nav@usevalueor nav@temp:border;{1}%
      \nav@passvaluenobracesand{[}nav@temp:dash;{]}{}]
  /C [\nav@usevalueor nav@temp:color;{\nav@usevalueor nav@temp:linkcolor;{0 0 0}}]
  \nav@ifcasevalue nav@temp:highlight;%
  \val none    /H/N
  \val invert  /H/I
  \val outline /H/O
  \val push    /H/P
  \endval
  \ifstring{#1}{x}
    {#2}
    {/Subtype/Link
     \ifstring{#1}{d}
       {/Dest (\anchorname{#2})}
       {/A \ifstring{#1}{r}
           {<< #2 >>}
           {\pdfrefobject{#2}}}}%
  \nav@usevalue nav@temp:raw;%
  }

\pdfdictobject{firstpage}{/S/Named /N/FirstPage}
\pdfdictobject{lastpage} {/S/Named /N/LastPage}
\pdfdictobject{prevpage} {/S/Named /N/PrevPage}
\pdfdictobject{nextpage} {/S/Named /N/NextPage}

\def\urlaction#1#2{%
  \pdfdictobject{#1}{/S/URI /URI (#2)}%
  }

\def\javascriptaction#1#2{%
  \pdfdictobject{#1}{/S/JavaScript /JS (\pdfstring{#2})}%
  }

\def\urllink{%
  \ifnext[
    {\nav@urllink}
    {\nav@urllink[]}%
  }

\def\nav@urllink[#1]#2{%
  \nav@actionlink_do{r}[#1]{/S/URI /URI (#2)}%
  }

\def\javascriptlink{%
  \ifnext[
    {\nav@javascriptlink}
    {\nav@javascriptlink[]}%
  }

\def\nav@javascriptlink[#1]#2{%
  \nav@actionlink_do{r}[#1]{/S/JavaScript /JS (\pdfstring{#2})}%
  }

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%% Embedded files %%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\def\nav@embeddedfile_names{}%

\ifcase\texenginenumber

\or % XeTeX
\def\nav@sort#1#2{%
  \straightenif{ifnum}{\strcmp{#1}{#2} < 0\relax}%
  }

\or % PDFTeX
\def\nav@sort#1#2{%
  \straightenif{ifnum}{\pdfstrcmp{#1}{#2} < 0\relax}%
  }

\or % LuaTeX
\def\nav@sort#1#2{%
  \usecs{%
    \directlua{%
      if [[#1]] < [[#2]] then
        tex.print("firstoftwo")
      else
        tex.print("secondoftwo")
      end}}}
\fi

\def\embeddedfile{%
  \ifnext[
    {\nav@embeddedfile_getdesc}
    {\nav@embeddedfile_getdesc[]}%
  }

\def\nav@embeddedfile_getdesc[#1]#2{%
  \ifnext[
    {\nav@embeddedfile_do{#1}{#2}}
    {\nav@embeddedfile_do{#1}{#2}[]}%
  }

\def\nav@embeddedfile_do#1#2[#3]#4{%s
  \pdffileobject[/Type/EmbeddedFile]{nav@embeddedfile:#2}{#4}%
  \pdfdictobject{#2}{%
    /Type/Filespec
    /F (\ifemptystring{#3}{#4}{#3})
    \reverse\iffemptystring{#1}{/Desc (\pdfstring{#1})}
    /EF << /F \pdfrefobject{nav@embeddedfile:#2} >>}%
  \let\nav@temp\nav@embeddedfile_names
  \let\nav@embeddedfile_names\emptycs
  \passexpanded{\ifemptystring{#3}{\nav@embeddedfile_add{#4}}{\nav@embeddedfile_add{#3}}{\pdfrefobject{#2}}}\nav@temp
  }

\newfor\nav@embeddedfile_add{2}#3#4{%
  \nav@sort{#1}{#3}
    {\global\eaddright\nav@embeddedfile_names{{#1}{#2}{#3}{#4}}%
     \retrieverest{\global\eaddright\nav@embeddedfile_names}}
    {\global\eaddright\nav@embeddedfile_names{{#3}{#4}}}%
  }[\global\eaddright\nav@embeddedfile_names{{#1}{#2}}]

\newfor\nav@embeddedfile_print#1#2{(#1) #2}

\def\nav@embeddedfile_process{%
  \pdfdictobject{EmbeddedFiles}{/Names [\passexpanded\nav@embeddedfile_print\nav@embeddedfile_names]}%
  \nav@embeddedfile_setnames
  }

\ifpdforluatex

\def\nav@embeddedfile_setnames{%
  \pdfnames{/EmbeddedFiles \pdfrefobject{EmbeddedFiles}}%
  }

\else

\def\nav@embeddedfile_setnames{%
  \special{pdf: put @names << /EmbeddedFiles \pdfrefobject{EmbeddedFiles} >>}%
  }

\fi

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%% INFO %%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\newif\ifnav@finished
\def\finishpdffile{%
  \unless\ifnav@finished
    \global\nav@finishedtrue
    \nav@embeddedfile_process
    \nav@processoutlines
    \nav@processinfo
  \fi
  }

\setparameter navigator :
% ANCHORS (and bookmarks which create implicit anchors)
  up    = \baselineskip
  left  = 0pt
  fit   = xyz
%  zoom = 1000 % If it is set, it always sets view to 100%, which is extremely irritating.
%
% LINKS
  border    = 0
  linkcolor = "0 0 0" % "color" in individual links
  highlight = invert
% dash      = 1 0
% raw       = makes sense for individual links only
% pre       = nothing
% post      = nothing
%
% OUTLINES
  outlinecolor = "0 0 0" % "color" in individual outlines
  open         = false
  bold         = false
  italic       = false
% action       = makes sense for individual outlines only
% anchor       = idem
%
% PDF info, no default values:
% author, title, keywords, subject, date, moddate,
% creator, producer, rawinfo
%
% PDF catalog, idem:
% layout, mode, uri or base, openaction, rawcatalog


\def\nav@processinfo_do#1#2{%
  \nav@passvalueand{/#1 (\pdfstring}navigator:#2;{) }{}%
  }

\def\nav@processinfo{%
  \nav@info{%
    \nav@processinfo_do{Author}       {author}%
    \nav@processinfo_do{Title}        {title}%
    \nav@processinfo_do{Keywords}     {keywords}%
    \nav@processinfo_do{Subject}      {subject}%
    \nav@processinfo_do{CreationDate} {date}%
    \nav@processinfo_do{ModDate}      {moddate}%
    \nav@processinfo_do{Creator}      {creator}%
    \nav@processinfo_do{Producer}     {producer}%
    \nav@usevalue navigator:rawinfo;}%
%
  \nav@passvalue\pdfensureobject navigator:openaction;%
  \nav@catalog{%
    \nav@ifattribute navigator:layout;
      {/PageLayout%
       \nav@ifcasevalue navigator:layout;%
       \val onepage    /SinglePage
       \val onecolumn  /OneColumn
       \val twopage    /TwoPageRight
       \val twopage*   /TwoPageLeft
       \val twocolumn  /TwoColumnRight
       \val twocolumn* /TwoColumnLeft
       \endval\spacecs}{}%
    \nav@ifattribute navigator:mode;
      {/PageMode
       \nav@ifcasevalue navigator:mode;%
       \val outlines    /UseOutlines
       \val bookmarks   /UseOutlines
       \val thumbnails  /UseThumbs
       \val thumbs      /UseThumbs
       \val oc          /UseOC
       \val attachments /UseAttachments
       \val files       /UseAttachments
       \elseval         /UseOutlines
       \endval\spacecs}{}%
    \nav@ifattribute navigator:uri;
      {/URI << /Base (\nav@usevalue navigator:uri;) >> }
      {\nav@ifattribute navigator:base;
         {/URI << /Base (\nav@usevalue navigator:base;) >> }
         {}}%
    \nav@passvalue{/OpenAction \pdfrefobject}navigator:openaction;%
    \nav@usevalue navigator:rawcatalog;}%
  }%

\ifpdforluatex

\let\nav@info\pdfinfo
\let\nav@catalog\pdfcatalog

\else

\def\nav@info#1{%
  \special{pdf: docinfo << #1 >>}%
  }
\def\nav@catalog#1{%
  \special{pdf: docview << #1 >>}%
  }

\fi

\restorecatcodes
\endinput
% Almost 800 lines? Gee, that code was supposed to
% be short and light...