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-% Copyright 2006 by Till Tantau
-%
-% This file may be distributed and/or modified
-%
-% 1. under the LaTeX Project Public License and/or
-% 2. under the GNU Public License.
-%
-% See the file doc/generic/pgf/licenses/LICENSE for more details.
-
-\ProvidesPackage{pgfwriteexternal}[2006/03/13 ver 0.01]
-
-
-% Modes of operation:
-%
-% Set \pgfexternalcurrent to empty, relax or undefined and all
-% \pgfexternal... are ignored
-%
-% Set \pgfexternalcurrnet to anything else and all text will be thrown
-% away, except the text in the \pgfexternalbegin...\pgfexternalend
-% with the right name.
-
-\AtBeginDocument{
- \ifx\pgfexternalcurrent\relax
- \let\pgfexternalcurrent=\@empty
- \fi
- \ifx\pgfexternalcurrent\@undefined
- \let\pgfexternalcurrent=\@empty
- \fi
- \ifx\pgfexternalcurrent\@empty
- \else
- \pgf@externalgrabshipout
- \fi
-}
-
-
-\newwrite\pgfexternal@caller
-
-% Environment for an external graphic.
-%
-% #1 = suffix
-%
-% Example:
-%
-% \pgfexternalbegin{mygraph}
-% \begin{tikzpicture}
-% ...
-% \end{tikzpicture}
-% \pgfextenalend
-
-\def\pgfexternalbegin#1{%
- \IfFileExists{#1.tex}{}{%
- \immediate\openout\pgfexternal@caller #1.tex%
- \immediate\write\pgfexternal@caller{\noexpand\def\noexpand\pgfexternalcurrent{#1}\noexpand\input \jobname.tex}%
- \immediate\closeout\pgfexternal@caller%
- }%
- \edef\pgf@test{#1}%
- \edef\pgfeeext{\pgfexternalcurrent}%
- \expandafter\scantokens\expandafter{\expandafter\edef\expandafter\pgfeeext\expandafter{\pgfeeext}}\unskip%
- \ifx\pgfeeext\pgf@test%
- \global\let\pgfexternalend=\pgf@externalend%
- \expandafter\pgf@externalprepareshipout%
- \fi%
- \ignorespaces%
-}
-
-\let\pgfexternalend=\unskip
-
-
-
-\newbox\pgfexternal@ignorebox
-\newbox\pgfexternal@box
-
-\def\pgf@externalgrabshipout{%
- \global\let\pgfexternal@originalshipout=\shipout%
- \global\def\shipout{\setbox\pgfexternal@ignorebox=}
-}
-
-\def\pgf@externalprepareshipout{%
- \setbox\pgfexternal@box=\hbox\bgroup\bgroup%
-}
-
-\def\pgf@externalend{%
- \unskip\egroup\egroup%
- {%
- \parindent0pt%
- \leftmargin0pt%
- \dimen0\ht\pgfexternal@box%
- \advance\dimen0\dp\pgfexternal@box%
- \pgfsys@papersize{\the\wd\pgfexternal@box}{\the\dimen0}%
- \setbox0=\vbox{%
- \kern -1truein%
- \hbox{%
- \kern -1truein%
- \hbox to0pt{\pgfsys@atbegindocument}%
- \box\pgfexternal@box%
- \kern 1truein}%
- \kern1truein}%
- \pgfexternal@originalshipout\box0%
- }%
- \global\let\pgfexternalend=\unskip%
-}
-
-\ifx\pdfoutput\undefined
- \newcount\pdfoutput
-\fi
-
-
-
-
-\endinput
-