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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/pgfcorepathusage.code.tex,v 1.8 2007/03/09 17:49:32 tantau Exp $
-
-
-% Stroke/fill/clip/etc. the current path. Depending on the options,
-% the current path will be stroked/filled/clipped/etc. If no options
-% are given, the path is stroked. If multiple options are given, all
-% of them are performed (in a sensible order).
-%
-% #1 = action(s) to be applied to the current path. Valid actions are:
-% stroke - strokes the path. If no options are given, this is the
-% default.
-% draw - same as stroke.
-% fill - fills the path.
-% clip - clip the path.
-% discard - Discards the path. Same effect as having an empty
-% options list.
-%
-% Example:
-%
-% % Draws an edge.
-% \pgfpathmoveto{\pgfxy(0,0)}
-% \pgfpathlineto{\pgfxy(0,1)}
-% \pgfpathlineto{\pgfxy(1,0)}
-% \pgfusepath{stroke}
-
-\define@key{pgfup}{stroke}[]{\def\pgf@up@stroke{stroke}}
-\define@key{pgfup}{draw}[]{\def\pgf@up@stroke{stroke}}
-\define@key{pgfup}{fill}[]{\def\pgf@up@fill{fill}}
-\define@key{pgfup}{clip}[]{\def\pgf@up@clip{clip}}
-\define@key{pgfup}{discard}[]{}
-\define@key{pgfup}{use as bounding box}[]{\def\pgf@up@bb{\pgf@relevantforpicturesizefalse}}
-
-\def\pgfusepath#1{%
- \let\pgf@up@stroke\pgfutil@empty%
- \let\pgf@up@fill\pgfutil@empty%
- \let\pgf@up@clip\pgfutil@empty%
- \let\pgf@up@discard\pgfutil@empty%
- \let\pgf@up@bb\pgfutil@empty%
- \setkeys{pgfup}{#1}%
- \expandafter\def\expandafter\pgf@up@action\expandafter{\csname pgfsys@\pgf@up@fill\pgf@up@stroke\endcsname}%
- \ifx\pgf@up@stroke\pgfutil@empty%
- \ifx\pgf@up@fill\pgfutil@empty%
- \ifx\pgf@up@clip\pgfutil@empty%
- \let\pgf@up@action=\pgfutil@empty%
- \pgfsyssoftpath@setcurrentpath\pgfutil@empty%
- \else%
- % only clipping
- \let\pgf@up@action=\pgfsys@discardpath%
- \fi%
- \fi%
- \fi%
- \pgfprocessround{\pgfsyssoftpath@currentpath}{\pgfsyssoftpath@currentpath}% change the current path
- %
- % Check whether the path is stroked. If so, add half the line width
- % to the bounding box.
- %
- \ifpgf@relevantforpicturesize%
- \ifx\pgf@up@stroke\pgfutil@empty%
- \else%
- \ifdim\pgf@picmaxx=-16000pt\relax%
- \else%
- \pgf@x=\pgf@pathminx\advance\pgf@x by-.5\pgflinewidth%
- \ifdim\pgf@x<\pgf@picminx\global\pgf@picminx\pgf@x\fi%
- \pgf@y=\pgf@pathminy\advance\pgf@y by-.5\pgflinewidth%
- \ifdim\pgf@y<\pgf@picminy\global\pgf@picminy\pgf@y\fi%
- \pgf@x=\pgf@pathmaxx\advance\pgf@x by.5\pgflinewidth%
- \ifdim\pgf@x>\pgf@picmaxx\global\pgf@picmaxx\pgf@x\fi%
- \pgf@y=\pgf@pathmaxy\advance\pgf@y by.5\pgflinewidth%
- \ifdim\pgf@y>\pgf@picmaxy\global\pgf@picmaxy\pgf@y\fi%
- \fi%
- \fi%
- \fi%
- %
- \ifx\pgf@up@clip\pgfutil@empty%
- \ifx\pgf@up@stroke\pgfutil@empty%
- \pgfsyssoftpath@invokecurrentpath%
- \pgfsyssoftpath@getcurrentpath\pgf@last@used@path%
- \pgf@up@action%
- \else%
- \pgf@check@for@arrows%
- \ifpgf@drawarrows%
- \pgf@shorten@path@as@needed%
- \pgfsyssoftpath@invokecurrentpath%
- \pgfsyssoftpath@getcurrentpath\pgf@last@used@path%
- \pgf@up@action%
- \pgfsyssoftpath@setcurrentpath\pgfutil@empty%
- \pgf@add@arrows@as@needed%
- \else%
- \pgfsyssoftpath@invokecurrentpath%
- \pgfsyssoftpath@getcurrentpath\pgf@last@used@path%
- \pgf@up@action%
- \fi%
- \fi%
- \else%
- \pgfsyssoftpath@invokecurrentpath%
- \pgfsyssoftpath@getcurrentpath\pgf@last@used@path%
- \pgfsys@clipnext%
- \pgf@up@action%
- \pgf@relevantforpicturesizefalse%
- \fi%
- \pgf@up@bb%
- \pgfsyssoftpath@setcurrentpath\pgfutil@empty%
- \pgf@resetpathsizes%
- \ignorespaces%
-}
-
-
-% Shorten start/end of paths by a certain amount.
-%
-% #1 = amount by which paths should be shortened.
-%
-% Example:
-%
-% \pgfpathmoveto{\pgfpointorigin}
-% \pgfpathlineto{\pgfpoint{10pt}{0pt}
-%
-% % The following has the same effect:
-% \pgfsetshortenstart{1pt}
-% \pgfpathmoveto{\pgfpointorigin}
-% \pgfpathlineto{\pgfpoint{11pt}{0pt}
-
-\def\pgfsetshortenstart#1{\pgfmathsetlength\pgf@shorten@start@additional{#1}}
-\def\pgfsetshortenend#1{\pgfmathsetlength\pgf@shorten@end@additional{#1}}
-
-\newif\ifpgf@drawarrows
-
-\def\pgf@check@for@arrows{%
- \pgf@drawarrowsfalse%
- \ifx\pgf@startarrow\pgfutil@empty\else\pgf@drawarrowstrue\fi%
- \ifx\pgf@endarrow\pgfutil@empty\else\pgf@drawarrowstrue\fi%
- \ifdim\pgf@shorten@end@additional=0pt\relax\else\pgf@drawarrowstrue\fi%
- \ifdim\pgf@shorten@start@additional=0pt\relax\else\pgf@drawarrowstrue\fi%
- \ifpgf@drawarrows%
- \pgfsyssoftpath@getcurrentpath\pgf@arrowpath%
- \ifx\pgf@arrowpath\pgfutil@empty%
- \pgf@drawarrowsfalse%
- \else%
- \pgfprocesscheckclosed{\pgf@arrowpath}{\pgf@drawarrowsfalse}%
- \fi%
- \fi%
-}
-
-\newdimen\pgf@shorten@end@additional
-\newdimen\pgf@shorten@start@additional
-
-\let\pgf@shorten@end=\pgfutil@empty
-\let\pgf@shorten@start=\pgfutil@empty
-
-\def\pgf@shorten@path@as@needed{%
- \pgfprocesspathextractpoints{\pgf@arrowpath}%
- \let\pgf@arrow@next=\pgf@shorten@now%
- \ifx\pgf@shorten@start\pgfutil@empty%
- \ifx\pgf@shorten@end\pgfutil@empty%
- \ifdim\pgf@shorten@end@additional=0pt\relax%
- \ifdim\pgf@shorten@start@additional=0pt\relax%
- \let\pgf@arrow@next=\relax%
- \fi%
- \fi%
- \fi%
- \fi%
- \pgf@arrow@next%
-}
-
-\def\pgf@shorten@now{%
- {%
- \pgf@x=0pt%
- \pgf@shorten@start%
- \advance\pgf@x by\pgf@shorten@start@additional%
- \pgf@xc=\pgf@x%
- \pgfpointlineatdistance{\pgf@xc}{\pgfpointfirstonpath}{\pgfpointsecondonpath}%
- \global\pgf@xb=\pgf@x%
- \global\pgf@yb=\pgf@y%
- \pgf@process{\pgfpointsecondonpath}%
- \global\advance\pgf@x by\pgf@xa%
- \global\advance\pgf@y by\pgf@ya%
- }%
- \edef\pgfpointfirstonpath{\noexpand\pgfqpoint{\the\pgf@xb}{\the\pgf@yb}}%
- \edef\pgfpointsecondonpath{\noexpand\pgfqpoint{\the\pgf@x}{\the\pgf@y}}%
- {%
- \pgf@x=0pt%
- \pgf@shorten@end%
- \advance\pgf@x by\pgf@shorten@end@additional%
- \pgf@xc=\pgf@x%
- \pgfpointlineatdistance{\pgf@xc}{\pgfpointlastonpath}{\pgfpointsecondlastonpath}%
- \global\pgf@xb=\pgf@x%
- \global\pgf@yb=\pgf@y%
- \pgf@process{\pgfpointsecondlastonpath}%
- \global\advance\pgf@x by\pgf@xa%
- \global\advance\pgf@y by\pgf@ya%
- }%
- \edef\pgfpointlastonpath{\noexpand\pgfqpoint{\the\pgf@xb}{\the\pgf@yb}}%
- \edef\pgfpointsecondlastonpath{\noexpand\pgfqpoint{\the\pgf@x}{\the\pgf@y}}%
- \pgfprocesspathreplacestartandend{\pgf@arrowpath}{\pgfpointfirstonpath}{\pgfpointlastonpath}%
- \pgfsyssoftpath@setcurrentpath\pgf@arrowpath%
-}
-
-\def\pgf@add@arrows@as@needed{%
- \ifx\pgf@startarrow\pgfutil@empty%
- \else%
- \pgflowlevelobj%
- {\pgftransformarrow{\pgfpointsecondonpath}{\pgfpointfirstonpath}}
- {\pgf@startarrow}%
- \fi%
- \ifx\pgf@endarrow\pgfutil@empty%
- \else%
- \pgflowlevelobj%
- {\pgftransformarrow{\pgfpointsecondlastonpath}{\pgfpointlastonpath}}
- {\pgf@endarrow}%
- \fi%
-}
-
-\let\pgf@startarrow=\pgfutil@empty
-\let\pgf@endarrow=\pgfutil@empty
-
-\endinput