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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.
-
-\ProvidesFileRCS $Header: /cvsroot/pgf/pgf/generic/pgf/basiclayer/pgfcorescopes.code.tex,v 1.24 2007/06/07 07:41:10 tantau Exp $
-
-% Globals
-
-\newbox\pgfpic
-\newbox\pgf@hbox
-
-\newbox\pgf@layerbox@main
-
-\newcount\pgf@picture@serial@count
-
-
-
-% This if decides whether the position of pictures on the page is
-% protocolled or not. Normally,
-% this is switched off as it works only with certain drivers and it
-% causes external files to be written. When switched on, the position
-% of pgfpictures are protocolled and can be referenced using
-% \pgfsys@getposition{XXX} where XXX is the value of \pgfpictureid
-% inside the picture.
-\newif\ifpgfrememberpicturepositiononpage
-
-
-
-% Library files inclusion
-
-
-% Include a library file.
-%
-% #1 = List of names of library file.
-%
-% Description:
-%
-% This command includes a list of library files. For each file X in the
-% list, the file pgflibraryX.code.tex is included, provided this has
-% not been done earlier.
-%
-% For the convenience of Context users, both round and square brackets
-% are possible for the argument.
-%
-% Example:
-%
-% \usepgflibrary{arrows}
-% \usepgflibrary[patterns,snakes]
-
-\def\usepgflibrary{\pgfutil@ifnextchar[{\use@pgflibrary}{\use@@pgflibrary}}%}
-\def\use@pgflibrary[#1]{\use@@pgflibrary{#1}}
-\def\use@@pgflibrary#1{%
- \edef\pgf@list{#1}%
- \pgfutil@for\pgf@temp:=\pgf@list\do{%
- \expandafter\ifx\csname pgf@library@\pgf@temp @loaded\endcsname\relax%
- \expandafter\let\csname pgf@library@\pgf@temp @loaded\endcsname=\pgfutil@empty%
- \expandafter\edef\csname pgf@library@#1@atcode\endcsname{\the\catcode`\@}
- \expandafter\edef\csname pgf@library@#1@barcode\endcsname{\the\catcode`\|}
- \catcode`\@=11
- \catcode`\|=12
- \input pgflibrary\pgf@temp.code.tex
- \catcode`\@=\csname pgf@library@#1@atcode\endcsname
- \catcode`\|=\csname pgf@library@#1@barcode\endcsname
- \fi%
- }%
-}
-
-
-
-% Scopes
-
-
-% Pgf scope environment. All changes of the graphic state are local to
-% the scope.
-%
-% Example:
-%
-% \begin{pgfscope}
-% \pgfsetlinewidth{3pt}
-% \pgfline{\pgfxy(0,0)}{\pgfxy(3,3)}
-% \end{pgfscope}
-
-\def\pgfscope{%
- \pgfsyssoftpath@setcurrentpath\pgfutil@empty%
- \pgfsys@beginscope%
- \pgf@resetpathsizes%
- \edef\pgfscope@linewidth{\the\pgflinewidth}%
- \begingroup}
-\def\endpgfscope{%
- \endgroup%
- \global\pgflinewidth=\pgfscope@linewidth%
- \pgfsys@endscope}
-
-
-
-
-% Quickly insert a box can contain normal TeX text at the origin.
-%
-% #1 = box of width/height and depth 0pt
-%
-% Example:
-%
-% \pgfqbox{\mybox}
-
-\def\pgfqbox#1{%
- \pgfsys@hbox#1%
-}
-
-
-% Insert a box that can contain normal TeX text at the origin, but
-% with the current coordinate transformation matrix synced with the
-% low-level transformation matrix.
-%
-% #1 = box of width/height and depth 0pt
-%
-% In essence, this command does the same as if you first said
-% \pgflowlevelsynccm and then \pgfqbox. However, pgf will use a
-% ``TeX-translation'' for the translation part of the transformation
-% cm. This will ensure that hyperlinks ``survive'' at least
-% translations.
-%
-% Example:
-%
-% \pgfqboxsynced{\mybox}
-
-\def\pgfqboxsynced#1{%
- \pgfsys@hboxsynced#1%
-}
-
-
-% Puts some text in a box and inserts it with the current
-% transformations applied.
-%
-% #1 = List of optional positioning. Possible values are ``left'', ``right'',
-% ``top'', ``bottom'' and ``base''.
-% #2 = TeX text. May contain verbatims.
-%
-% Example:
-%
-% \pgftransformshift{\pgfpoint{1cm}{0cm}}
-% \pgftext{Hello World!}
-
-\def\pgftext{\pgfutil@ifnextchar[\pgf@text{\pgf@text[]}}%
-\def\pgf@text[#1]{%
- \def\pgf@text@options{#1}%
- \pgf@maketext\pgf@after@text}
-\def\pgf@after@text{%
- {%
- \def\pgf@text@hshift{center}%
- \def\pgf@text@vshift{center}%
- \def\pgf@marshal{\setkeys{pgfbox}}%
- \expandafter\pgf@marshal\expandafter{\pgf@text@options}%
- \csname pgf@halign\pgf@text@hshift\endcsname%
- \csname pgf@valign\pgf@text@vshift\endcsname%
- % Protocol sizes:
- \pgf@process{\pgfpointtransformed{\pgfqpoint{0pt}{\dp\pgf@hbox}}}%
- \pgf@protocolsizes{\pgf@x}{\pgf@y}%
- \pgf@process{\pgfpointtransformed{\pgfqpoint{\wd\pgf@hbox}{\dp\pgf@hbox}}}%
- \pgf@protocolsizes{\pgf@x}{\pgf@y}%
- \pgf@process{\pgfpointtransformed{\pgfqpoint{0pt}{\ht\pgf@hbox}}}%
- \pgf@protocolsizes{\pgf@x}{\pgf@y}%
- \pgf@process{\pgfpointtransformed{\pgfqpoint{\wd\pgf@hbox}{\ht\pgf@hbox}}}%
- \pgf@protocolsizes{\pgf@x}{\pgf@y}%
- \pgfqboxsynced{\pgf@hbox}%
- }%
-}
-
-\define@key{pgfbox}{left}[]{\def\pgf@text@hshift{left}}
-\define@key{pgfbox}{center}[]{}
-\define@key{pgfbox}{right}[]{\def\pgf@text@hshift{right}}
-\define@key{pgfbox}{top}[]{\def\pgf@text@vshift{top}}
-\define@key{pgfbox}{bottom}[]{\def\pgf@text@vshift{bottom}}
-\define@key{pgfbox}{base}[]{\def\pgf@text@vshift{base}}
-\define@key{pgfbox}{at}{\pgftransformshift{#1}}
-\define@key{pgfbox}{x}{\pgftransformxshift{#1}}
-\define@key{pgfbox}{y}{\pgftransformyshift{#1}}
-\define@key{pgfbox}{rotate}{\pgftransformrotate{#1}}
-
-\def\pgf@halignleft{}% do nothing
-\def\pgf@haligncenter{\pgftransformxshift{+-.5\wd\pgf@hbox}}
-\def\pgf@halignright{\pgftransformxshift{+-\wd\pgf@hbox}}%
-\def\pgf@valignbase{}% do nothing
-\def\pgf@valignbottom{\pgftransformyshift{+\dp\pgf@hbox}}%
-\def\pgf@valigncenter{\pgftransformyshift{+.5\dp\pgf@hbox}\pgftransformyshift{+-.5\ht\pgf@hbox}}%
-\def\pgf@valigntop{\pgftransformyshift{+-\ht\pgf@hbox}}%
-
-
-% Internal function for creating a hbox.
-\def\pgf@maketext#1{%
- \def\pgf@@maketextafter{#1}%
- \setbox\pgf@hbox=\hbox\bgroup%
- \pgfinterruptpicture%
- \bgroup%
- \aftergroup\pgf@collectresetcolor%
- \let\next=%
-}
-\def\pgf@collectresetcolor{%
- \pgfutil@ifnextchar\reset@color%
- {\reset@color\afterassignment\pgf@collectresetcolor\let\pgf@temp=}%
- {\pgf@textdone}%
-}
-\def\pgf@textdone{%
- \endpgfinterruptpicture%
- \egroup%
- \pgf@@maketextafter%
-}
-
-\long\def\pgf@makehbox#1{%
- \setbox\pgf@hbox=\hbox{{%
- \pgfinterruptpicture%
- #1%
- \endpgfinterruptpicture%
- }}}
-
-
-
-% Picture environment
-%
-% Example:
-%
-% \begin{pgfpicture}
-% \pgfsetendarrow{\pgfarrowto}
-% \pgfpathmoveto{\pgfpointxy{-0.9}{0.2}}
-% \pgfpathlineto{\pgfpointxy{0.9}{0.4}}
-% \pgfusepath{stroke}
-% \end{pgfpicture}
-
-\newif\ifpgfpicture
-
-\def\pgfpicture{%
- \begingroup%
- \pgfpicturetrue%
- \global\advance\pgf@picture@serial@count by1\relax%
- \edef\pgfpictureid{pgfid\the\pgf@picture@serial@count}%
- \let\pgf@nodecallback=\pgfutil@gobble%
- \pgf@picmaxx=-16000pt\relax%
- \pgf@picminx=16000pt\relax%
- \pgf@picmaxy=-16000pt\relax%
- \pgf@picminy=16000pt\relax%
- \pgf@relevantforpicturesizetrue%
- \pgf@resetpathsizes%
- \pgfutil@ifnextchar\bgroup\pgf@oldpicture\pgf@picture}
-\def\pgf@oldpicture#1#2#3#4{%
- \pgfmathsetlength\pgf@picminx{#1}%
- \pgfmathsetlength\pgf@picminy{#2}%
- \pgfmathsetlength\pgf@picmaxx{#3}%
- \pgfmathsetlength\pgf@picmaxy{#4}%
- \pgf@relevantforpicturesizefalse%
- \pgf@picture}
-
-\def\pgf@picture{%
- \setbox\pgfpic\hbox to0pt\bgroup%
- \begingroup%
- \pgfsys@beginpicture%
- \pgfsys@beginscope%
- \begingroup%
- \pgfsetcolor{.}%
- \pgfsetlinewidth{0.4pt}%
- \pgftransformreset%
- \pgfsyssoftpath@setcurrentpath\pgfutil@empty%
- \begingroup%
- \let\pgf@setlengthorig=\setlength%
- \let\pgf@addtolengthorig=\addtolength%
- \let\pgf@selectfontorig=\selectfont%
- \let\setlength=\pgf@setlength%
- \let\addtolength=\pgf@addtolength%
- \let\selectfont=\pgf@selectfont%
- \nullfont\spaceskip\z@\xspaceskip\z@%
- \setbox\pgf@layerbox@main\hbox to0pt\bgroup%
- \begingroup%
- }
-\def\endpgfpicture{%
- \ifpgfrememberpicturepositiononpage%
- \hbox to0pt{\pgfsys@markposition{\pgfpictureid}}%
- \fi%
- % ok, now let's position the box
- \ifdim\pgf@picmaxx=-16000pt\relax%
- % empty picture. make size 0.
- \global\pgf@picmaxx=0pt\relax%
- \global\pgf@picminx=0pt\relax%
- \global\pgf@picmaxy=0pt\relax%
- \global\pgf@picminy=0pt\relax%
- \fi%
- % Shift baseline outside:
- \pgf@relevantforpicturesizefalse%
- \pgf@process{\pgf@baseline}%
- \gdef\pgf@shift@baseline{\the\pgf@y}%
- \endgroup%
- \hss%
- \egroup%
- \pgf@insertlayers%
- \endgroup%
- \pgfsys@discardpath%
- \endgroup%
- \pgfsys@endscope%
- \pgfsys@endpicture%
- \endgroup%
- \hss
- \egroup%
- \pgfsys@typesetpicturebox\pgfpic%
- \endgroup%
-}
-
-\def\pgf@insertlayers{%
- \box\pgf@layerbox@main%
-}
-
-\def\pgf@selectfont{\pgf@selectfontorig\nullfont}
-
-\def\pgf@setlength#1#2{% these will be used only when \nullfont is active
- \begingroup% keep font setting local
- \pgfutil@selectfont% restore font
- \pgf@setlengthorig#1{#2}% calculate dimension (possibly using calc)
- \expandafter%
- \endgroup%
- \expandafter#1\expandafter=\the#1\relax}
-\def\pgf@addtolength#1#2{%
- \begingroup% keep font setting local
- \pgfutil@selectfont% restore font
- \pgf@addtolengthorig#1{#2}% calculate dimension (possibly using calc)
- \expandafter%
- \endgroup%
- \expandafter#1\expandafter=\the#1\relax}
-
-
-% Sets the baseline at the y-coordinate of a given point
-%
-% #1 = point
-%
-% Sets the baseline of the picture to the y-coordinate of a given
-% point. However, the point will be evaluated *at the end of the
-% picture*.
-%
-% Example:
-%
-% \pgfsetbaselinepointlater{\pgfpointanchor{mynode}{base}}
-
-\def\pgfsetbaselinepointlater#1{\def\pgf@baseline{#1}}
-
-
-% Sets the baseline at the y-coordinate of a given point, now
-%
-% #1 = point
-%
-% Sets the baseline of the picture to the y-coordinate of a given
-% point.
-%
-% Example:
-%
-% \pgfsetbaselinepointnow{\pgfpoint{1cm}{2pt}}
-
-\def\pgfsetbaselinepointnow#1{%
- \pgf@process{#1}%
- \edef\pgf@setter@baseline{\noexpand\pgfpoint{\the\pgf@x}{\the\pgf@y}}%
- \pgfsetbaselinepointlater{\pgf@setter@baseline}%
-}
-
-
-% Sets the baseline
-%
-% #1 = baseline
-%
-% Sets the baseline of the picture. Default is the lower border, which
-% is the same as \pgf@picminy
-%
-% Example:
-%
-% \pgfsetbaseline{1cm+2pt}
-
-\def\pgfsetbaseline#1{\pgfsetbaselinepointlater{\pgfpoint{0pt}{#1}}}
-\pgfsetbaseline{\pgf@picminy}
-
-
-
-
-% Interrupt path
-%
-% Description:
-%
-% The environment can be used to insert some drawing commands while
-% constructing a path. The drawing commands inside the environment
-% will not interfere with the path being constructed ``outside.''
-% However, you must ward against graphic state changes using a scope.
-%
-% Example: Draw two parallel lines
-%
-% \pgfmoveto{\pgfpoint{0cm}{0cm}}
-% \begin{pgfinterruptpath}
-% \pgfmoveto{\pgfpoint{1cm}{0cm}}
-% \pgfmoveto{\pgfpoint{1cm}{1cm}}
-% \pgfusepath{stroke}
-% \end{pgfinterruptpath}
-% \pgflineto{\pgfpoint{0cm}{1cm}}
-% \pgfusepath{stroke}
-
-\def\pgfinterruptpath
-{%
- \begingroup%
- % save all sorts of things...
- \edef\pgf@interrupt@savex{\the\pgf@path@lastx}%
- \edef\pgf@interrupt@savey{\the\pgf@path@lasty}%
- \pgf@getpathsizes\pgf@interrupt@pathsizes%
- \pgfsyssoftpath@getcurrentpath\pgf@interrupt@path%
- \pgfsyssoftpath@setcurrentpath\pgfutil@empty%
- \edef\pgfscope@linewidth{\the\pgflinewidth}%
- \let\pgf@interrupt@lastmoveto=\pgfsyssoftpath@lastmoveto%
- \begingroup%
-}
-\def\endpgfinterruptpath
-{%
- \endgroup%
- \global\pgflinewidth=\pgfscope@linewidth%
- \pgfsyssoftpath@setcurrentpath\pgf@interrupt@path%
- \pgf@setpathsizes\pgf@interrupt@pathsizes%
- \global\pgf@path@lastx=\pgf@interrupt@savex%
- \global\pgf@path@lasty=\pgf@interrupt@savey%
- \global\let\pgfsyssoftpath@lastmoveto=\pgf@interrupt@lastmoveto%
- \endgroup%
-}
-
-
-
-% Interrupt bounding box
-%
-% Description:
-%
-% The environment can be used to temporarily setup a new bounding box
-% computation. The bounding box will be made empty at the beginning of
-% the environment and will be reset to its old value after the
-% environment.
-%
-% Example:
-%
-% \begin{pgfinterruptboundinbox}
-% \pgfmoveto{\pgfpoint{1cm}{0cm}}
-% \pgfmoveto{\pgfpoint{1cm}{1cm}}
-% \pgfusepath{stroke}
-% \end{pgfinterruptboundinbox}
-
-\def\pgfinterruptboundingbox
-{%
- \begingroup%
- \edef\pgf@interrupt@savemaxx{\the\pgf@picmaxx}%
- \edef\pgf@interrupt@saveminx{\the\pgf@picminx}%
- \edef\pgf@interrupt@savemaxy{\the\pgf@picmaxy}%
- \edef\pgf@interrupt@saveminy{\the\pgf@picminy}%
- \pgf@picmaxx=-16000pt\relax%
- \pgf@picminx=16000pt\relax%
- \pgf@picmaxy=-16000pt\relax%
- \pgf@picminy=16000pt\relax%
-}
-\def\endpgfinterruptboundingbox
-{%
- \global\pgf@picmaxx=\pgf@interrupt@savemaxx%
- \global\pgf@picmaxy=\pgf@interrupt@savemaxy%
- \global\pgf@picminx=\pgf@interrupt@saveminx%
- \global\pgf@picminy=\pgf@interrupt@saveminy%
- \endgroup%
-}
-
-
-
-
-
-% Interrupts a picture
-%
-% Description:
-%
-% This environment interrupts a picture and temporarily returns to
-% normal TeX mode. All sorts of things are saved and restored by this
-% environment.
-%
-% WARNING: Using this environment in conjuction with low level
-% transformations can *strongly* upset the typesetting. Typically, the
-% contents of this environment should have size/height/depth 0pt in
-% the end.
-%
-% WARNING: This environment should only be used inside typesetting a
-% box and this box must in turn be inserted using \pgfqbox.
-%
-% Example: Draw two parallel lines
-%
-% \pgfmoveto{\pgfpoint{0cm}{0cm}}
-% \setbox\mybox=\hbox{
-% \begin{pgfinterruptpicture}
-% This is normal text.
-% \begin{pgfpicture} % a subpicture
-% \pgfmoveto{\pgfpoint{1cm}{0cm}}
-% \pgfmoveto{\pgfpoint{1cm}{1cm}}
-% \pgfusepath{stroke}
-% \end{pgfpicture}
-% More text.
-% \end{pgfinterruptpicture}
-% }
-% \ht\mybox=0pt
-% \wd\mybox=0pt
-% \dp\mybox=0pt
-% \pgfqbox{\mybox}%
-% \pgfpathlineto{\pgfpoint{0cm}{1cm}}
-% \pgfusepath{stroke}
-
-\def\pgfinterruptpicture
-{%
- \begingroup%
- \pgfinterruptboundingbox%
- \pgftransformreset%
- \pgfinterruptpath%
- \ifx\pgf@selectfontorig\@undefined%
- \else%
- \let\setlength\pgf@setlengthorig%
- \let\addtolength\pgf@addtolengthorig%
- \let\selectfont\pgf@selectfontorig%
- \fi%
- \pgfutil@selectfont%
- \pgfpicturefalse%
- \pgf@savelayers%
-}
-\def\endpgfinterruptpicture
-{%
- \pgf@restorelayers%
- \endpgfinterruptpath%
- \endpgfinterruptboundingbox%
- \endgroup%
-}
-
-\let\pgf@savelayers=\relax
-\let\pgf@restorelayers=\relax
-
-
-\endinput