pari-doc 2.9.1-1 / usr / share / pari / doc / pdfmacs.tex

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% Copyright (c) 2000  The PARI Group
%
% This file is part of the PARI/GP documentation
%
% Permission is granted to copy, distribute and/or modify this document
% under the terms of the GNU General Public License

%% Modifications to parimacro.tex to be run through pdftex instead of
%% tex. Code now includes some pdf-specific code for hyperlinks.
%%
%% Cliff Bergman (cbergman@iastate.edu) Jan. 2000.
%%
%
%% Set the document info
\pdfoutput = 1
\pdfinfo {
  /Title    (\TITLE)
  /Creator  (pdfTeX)
  /Producer (PARI, pari@math.u-bordeaux.fr)
  /Author   (C. Batut, K. Belabas, D. Bernardi, H. Cohen, M. Olivier)
  /Subject  (Number Theory) }
%
\pdfcatalog {/PageMode /UseOutlines}
%
\catcode`\@=11
%% Now we redefine several of the macros so as to provide hyperlinks.
%
%  Colors
%
%% We use TeX's grouping mechanism to make \currentcolor into a  stack.
%
 \def\pushcolor#1{\bgroup\pdfsetcolor{#1}}
 \def\popcolor{\egroup\pdfsetcolor{\currentcolor}}
 \def\pdfsetcolor#1{\let\currentcolor=#1\pdfliteral{#1 k}}
% %
% %  Maybe somebody with a better eye would like to pick nicer ones. See
% %  the file plain/misc/pdfcolor.tex in the pdftex distribution.
% %
 \def\Red{0 1 1 0}
 \def\Blue{1 1 0 0}
 \def\Green{1 0 1 0}
 \def\Black{0 0 0 1}
 \def\textcolor{\Black}
 \def\linkcolor{\Red}
 \def\emacscolor{\Green}
 \def\unixcolor{\Blue}
 \let\currentcolor=\textcolor
 \pdfsetcolor{\textcolor}
%
%% Bookmarks.  These turned out to be a pain.  In order to get nested
%% bookmarks, Acrobat requires that each entry declare the number of
%% subentries in advance.  We do this by counting the subentries (the
%% main entries are the chapters, subentries are the sections) during
%% the first pass and writing them to the aux file as a macro. Then the
%% bookmark entry is created on the second pass.

% These keep track of the number of sections in each chapter and appendix.
\newtoks\numsectok    \numsectok={\or}
\newtoks\numsecapptok \numsecapptok={\or}

% Append #1 to the token list given in #2, separated by \or.  #1 is
%    expanded first (needed by \numsecs)
\def\append#1#2{\toks0=\expandafter{#1 \or }%
  \edef\act{\global\noexpand#2={\the#2 \the\toks0}}\act}

\def\writesecnumbers{
% Append the number of sections to the last appendix to the toks reg.
  \append{\the\secno}\numsecapptok
% Write the definitions of (\numsecs and \numsecapp) to the aux file.
  \write\aux{
    \def\string\numsecs\string##1{%
      \string\ifcase \string##1 \the\numsectok 0 \string\else 0 \string\fi}
    \def\string\numsecsapp\string##1{%
      \string\ifcase \string##1 \the\numsecapptok 0 \string\else 0 \string\fi}}}
%
% Hyperlink destinations will simply be of the form: pdf@nnn, where nnn
% is obtained from a new counter.
\newcount\pdfdestcntr \pdfdestcntr=0
% \putdest creates a pdf destination. Currently, the destination view
% is 'xyz' which means no change from the existing zoom factor.
\def\putdest{\global\advance\pdfdestcntr by 1%
 \pdfdest name {pdf@\number\pdfdestcntr} xyz }

%% It turns out that I also need a different counter for these
%% destinations since they are only computed on the second pass.
\newcount\pdfchapcntr \pdfchapcntr=0
\def\putchapdest{\global\advance\pdfchapcntr by1%
 \pdfdest name {pdfchap@\number\pdfchapcntr} fitbh }

\def\chapter#1#2\par{
  \ifnum\chapno=0 \else \append{\the\secno}\numsectok \fi
  \secno=0\global\advance\chapno by 1
  \title{Chapter \number\chapno:}{#1}#2\noindent\ignorespaces
  \ifsecondpass
   \pdfoutline goto name {pdfchap@\number\pdfchapcntr} count -\numsecs\chapno
     {\number\chapno\ #1}
   \fi
}
\def\appendix#1{
  \ifnum\appno=0 \append{\the\secno}\numsectok
   \else \append{\the\secno}\numsecapptok \fi
  \chapno=0
  \global\secno=0\global\advance\appno by 1
  \def\applet{\ifcase\appno\or A\or B\or C\or D\or E\or F\or G\fi}
  \title{Appendix \applet:}{#1}\noindent\ignorespaces
  \ifsecondpass
   \pdfoutline goto name {pdfchap@\number\pdfchapcntr}
    count -\numsecsapp\appno {\applet\ #1}
   \fi}
\def\section#1{
  \subsecno=0\global\advance\secno by 1
  \gdef\currentlabel{\number\secno}
  \sectitle{\maketitle{#1}}
  \ifsecondpass
   \pdfoutline goto name {pdfchap@\number\pdfchapcntr}
    {\number\chapno.\number\secno\ #1}
  \fi
}
%
%% FIXME: should use \[push|pop]color and not use explicitly \textcolor
%% (cf install() in Chapter 3)
\def\@restore{\endgraf \global\let\par\endgraf \pdfsetcolor{\textcolor}}
\def\unix{\global\let\par\@restore\pdfsetcolor{\unixcolor}\annotepar{UNIX}}
\def\emacs{\global\let\par\@restore\pdfsetcolor{\emacscolor}\annotepar{EMACS}}

%% labels and symbolic cross-refs.  For this we use the parameter to
%% build the symbolic pdf destination.
\@ifundef{pdfstartlink}{\global\let\pdfstartlink\pdfannotlink}{}
\def\label#1{\immediate\write\aux{\string
   \newlabel{#1}{{\the\chapno}{\currentlabel}}}
   \pdfdest name {pdf@lab#1} xyz}
\def\ref#1{\@ifundef{r@#1}
  {{\bf ??}\@errundef{#1}}
  {\edef\@temp{\csname r@#1\endcsname}%
    \def\lbl{\@ref}\def\chp{\@cref}%
    \pdfjumpref{#1}{\ifx\chp{\the\chapno}\lbl\else\chp.\lbl\fi}}}
\def\pdfjumpref#1#2{\pdfstartlink attr {/Border [ 0 0 0 ] /H /O}
  goto name {pdf@lab#1}\pushcolor{\linkcolor}#2\popcolor\pdfendlink}

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