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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{xxcolor}[2003/10/24 ver 0.1]
-\NeedsTeXFormat{LaTeX2e}[1995/12/01]
-
-\RequirePackage{xcolor}
-
-
-
-% Command \newcolormixin{\somecommand}
-%
-% Description:
-%
-% After this command has been called, you can assign a partial color
-% specification to \somecommand. Every time a color is set, the
-% partial color specification in \somecommand will be applied to the
-% current color.
-%
-% Examples:
-%
-% \newcolormixin\mymixin
-% \def\mymixin{!50!white}
-%
-% \newcolormixin\anothermixin
-% \def\anothermixin{!50!red}
-
-\def\newcolormixin#1{%
- \expandafter\def\csname XC@mixin@\the\XC@nummixins\endcsname{#1}%
- \advance\XC@nummixins\@ne%
- \ifx#1\@undefined\def#1{}\fi}
-
-\newcount\XC@nummixins
-\newcount\XC@countmixins
-
-
-% Command \applycolormixins{colorname}
-%
-% Description:
-%
-% Applies all color mixins that have been defined using \newcolormixin
-% to the color named colorname.
-%
-% Examples:
-%
-% \applycolormixins{mycolor}
-
-\def\applycolormixins#1{%
- \XC@countmixins=0\relax%
- \loop%
- \ifnum\XC@countmixins<\XC@nummixins%
- \colorlet{#1}{#1\csname XC@mixin@\the\XC@countmixins\endcsname}%
- \advance\XC@countmixins\@ne\relax%
- \repeat%
-}
-
-
-% Internal:
-
-\ifx\XC@mcolor\relax
- \let\XC@mcolor\@empty
-\fi
-
-\g@addto@macro\XC@mcolor{%
- \ifnum\XC@nummixins>0%
- \@namelet{\string\color@XC@mixtmp}{\string\color@.}%
- \applycolormixins{XC@mixtmp}%
- \@namelet{current@color}{\string\color@XC@mixtmp}%
- \fi%
-}
-
-
-
-% Environment colormixin
-%
-% #1 = full xcolor specification after the first ! ("white" may not be
-% omitted)
-%
-% Description:
-%
-% Inside the environment, all colors get the specified mixin. May be
-% nested.
-%
-% Examples:
-%
-% \color{red}This is red.
-% \begin{colormixin}{25!black}
-% This is dark red.
-% \color{blue}
-% This is dark blue.
-% \end{colormixin}
-% This is normal red once more.
-
-\newcolormixin\colorcurrentmixin
-
-\newenvironment{colormixin}[1]%
-{\edef\colorcurrentmixin{!#1\colorcurrentmixin}\color{.}}{}
-
-\def\pgfalternateextension{\colorcurrentmixin}
-
-\endinput
-