% colorframed.sty    v0.9b    2022/10/01
% Copyright (C) 2022 Jean-François Burnol
% Distributed under the terms of the LPPL 1.3c, see README.md
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{colorframed}
    [2022/10/01 v0.9b fix `framed' breakable boxes colour leaks (JFB)]
% Apart from code comments here, documentation is in colorframed-doc.pdf
\RequirePackage{framed}
\RequirePackage{color}
% First we must make \MakeFramed/\endMakeFramed colour safe.
\expandafter\def\expandafter\MakeFramed\expandafter#\expandafter1\expandafter
  {\MakeFramed{#1}\color@begingroup}
\expandafter\def\expandafter\endMakeFramed\expandafter
  {\expandafter\color@endgroup\endMakeFramed}
%
% `framed'
\def\FrameCommand{%
    \setlength\fboxrule{\FrameRule}\setlength\fboxsep{\FrameSep}%
    \CustomFBox{}{}\fboxrule\fboxrule\fboxrule\fboxrule % replaces \fbox
}
% The frame colour can be set via modifying this macro.
\def\colorframedbordercolorcommand{\normalcolor}
%
% `shaded', `shaded*', `snugshade', `snugshade*'
% The \colorbox in \FrameCommand is replaced by \colorframedcolorbox
\renewenvironment{shaded}{%
  \def\FrameCommand{\fboxsep=\FrameSep 
                    \colorframedcolorbox{shadecolor}}%<<<< MODIFIED
  \MakeFramed {\FrameRestore}}%
 {\endMakeFramed}
\renewenvironment{shaded*}{%
  \def\FrameCommand{\fboxsep=\FrameSep
                    \colorframedcolorbox{shadecolor}}%<<<< MODIFIED
  \MakeFramed {\advance\hsize-\width \FrameRestore}}%
 {\endMakeFramed}
\renewenvironment{snugshade}{%
  \def\FrameCommand##1{\hskip\@totalleftmargin \hskip-\fboxsep
  \colorframedcolorbox{shadecolor}{##1}%<<<< MODIFIED
      \hskip-\fboxsep
      % There is no \@totalrightmargin, so:
      \hskip-\linewidth \hskip-\@totalleftmargin \hskip\columnwidth}%
  \MakeFramed {\advance\hsize-\width 
    \@totalleftmargin\z@ \linewidth\hsize
    \@setminipage}%
 }{\par\unskip\@minipagefalse\endMakeFramed}
\renewenvironment{snugshade*}{%
  \def\FrameCommand##1{\hskip\@totalleftmargin 
  \colorframedcolorbox{shadecolor}{##1}%<<<< MODIFIED
      % There is no \@totalrightmargin, so:
      \hskip-\linewidth \hskip-\@totalleftmargin \hskip\columnwidth}%
  \MakeFramed {\advance\hsize-\width 
    \@totalleftmargin\z@ \linewidth\hsize
    \advance\labelsep\fboxsep
    \@setminipage}%
 }{\par\unskip\@minipagefalse\endMakeFramed}
% The \colorframedcolorbox was obtained via a process of trimming from some
% far more capable box, hence some possibly strange looking or sub-optimal
% code; but we did not want to keep extra capabilities and have to provide
% interface for that...
\def\colorframedcolorbox#1#2{%
  % #1 is in our usage always "shadecolor" (which has to be defined by user)
  % #2 is in our usage always a box or rule
  \leavevmode% this is not needed in our usage
  \hbox{%
    \setbox\@tempboxa\hbox{\kern\fboxsep{#2}\kern\fboxsep}%
    \ht\@tempboxa
       \dimexpr\ht\@tempboxa+\fboxsep\relax
    \dp\@tempboxa
       \dimexpr\dp\@tempboxa+\fboxsep\relax
    % BACKGROUND
    % draw background and move back to reference point
    {\color{#1}%
     \vrule\@height\ht\@tempboxa
           \@depth\dp\@tempboxa
           \@width\wd\@tempboxa
     \kern-\wd\@tempboxa
    }%
    % CONTENTS
    \box\@tempboxa
  }%
}
%
% `oframed' and `titled-frame'
% The \CustomFBox redefinition.
% Refer to framed.sty for significance of the parameters.
% We have not wrapped #3, #4, #5, #6 thicknesses in \dimexpr.
% Generally speaking, no attempt here to make this macro more
% versatile than is the original.
% Our version tries to let #1 and #2 have same effect as in original
% (where they are only used for titled-frame environment, and
%  it thus seems to be sort of a convention that #2 has no height.)
\long\def\CustomFBox#1#2#3#4#5#6#7{%
  \leavevmode\begingroup
  \setbox\@tempboxa\hbox{%
    \color@begingroup
      \kern\fboxsep{#7}\kern\fboxsep
    \color@endgroup}%
  \hbox{%
    \ht\@tempboxa
       \dimexpr\ht\@tempboxa+\fboxsep+#3\relax % cf "overlap" remark below
    \dp\@tempboxa
       \dimexpr\dp\@tempboxa+\fboxsep+#4\relax
        \setbox\z@\hbox
                  {\vrule\@width#5\relax
                   \kern\wd\@tempboxa
                   \vrule\@width#6\relax
                  }%
            \ht\z@\ht\@tempboxa
            \dp\z@\dp\@tempboxa
    \vbox{%
        \colorframedbordercolorcommand % defaults to \normalcolor
        \hrule\@height#3\relax
        #1%
        \kern-#3\relax % see discussion of issue #2
        \copy\z@ % deliberate overlap hrules+vrules to avoid anti-aliasing artefacts
        \kern-#4\relax
        #2%
        \hrule\@height#4\relax
        \kern-\dp\@tempboxa
       }%
    \kern-\wd\z@
    \kern#5\relax
    \box\@tempboxa
    \kern#6\relax
  }%
  \endgroup
}
% The titled-frame environment depends in part on this macro,
% whose original in framed.sty has various colour problems.
% We have indicated the modifications, additionally to using
% our modified \CustomFBox.
% Original let the continuation label use same colour as frame.
% Let make this customizable.
\let\colorframedTFconlabcolorcommand\empty
\renewcommand\TitleBarFrame[3][]{\begingroup
  \ifx\delimiter#1\delimiter
    \let\TF@conlab\@empty
  \else
    \def\TF@conlab{%
     \nointerlineskip
     \hbox{%<<<< ADDED (needed due to \smash doing \leavevmode nowadays)
           \colorframedTFconlabcolorcommand%<<<< ADDED
     \smash{\rlap{\kern\wd\@tempboxa\kern\fboxrule\kern\fboxsep #1}}}%
          }%<<<< ADDED
  \fi
  %\let\TF@savecolor\current@color%<<<< REMOVED
  %\textcolor{TFFrameColor}{%      <<<< REMOVED
  \def\colorframedbordercolorcommand{\color{TFFrameColor}}%<<<< ADDED
  \CustomFBox
    {\TF@Title{#2}}{\TF@conlab}%
    \fboxrule\fboxrule\fboxrule\fboxrule
    {%\let\current@color\TF@savecolor\set@color%<<<< REMOVED
    #3}%
  %}%                              <<<< REMOVED
  \endgroup
}
% There are various issues with \TitleBarFrame/\TF@Title/TF@conlab
% we provide an alternative
\def\colorframedTFconlabsep{3pt}
\newcommand\colorframedTitleBarFrame[3][]{\begingroup
  \ifx\delimiter#1\delimiter
    \let\TF@conlab\@empty
  \else
    \def\TF@conlab{%
     \nointerlineskip
     \hbox{\colorframedTFconlabcolorcommand
     \smash{\rlap{\kern\wd\@tempboxa
                  % 2\fboxrule, not \fboxrule\fboxsep!
                  \kern2\fboxrule
                  \kern\dimexpr\colorframedTFconlabsep\relax #1}}}%
          }%
  \fi
  \def\colorframedbordercolorcommand{\color{TFFrameColor}}%
  \CustomFBox
    {\colorframed@TF@Title{#2}}{\TF@conlab}%
    \fboxrule\fboxrule\fboxrule\fboxrule
    {#3}%
  \endgroup
}
% The title bar for \colorframedTitleBarFrame, it will wrap its argument
% as paragraphs in case it is too long, the horizontal placement is improved
% and it will be suitably vertically centered. Nota Bene: for #1 to be
% allowed to contain \par, the \textbf in titled-frame must be replaced by
% some \bfseries.
% Macro to customize the horizontal placement. For example
% \def\colorframedTFtitleshift{0pt}
% if \fboxrule is set by the environment to a high value.
% Don't use negative value, some parts of the title may then be hidden
% behind the left border.
\def\colorframedTFtitlesep{\fboxsep}
\newcommand\colorframed@TF@Title[1]{%
  \ifx\delimiter#1\delimiter\else
  %\kern-0.04pt\relax
  \kern-.5\fboxrule
  \begingroup
  \setbox\@tempboxa\vbox{%
   \kern0.8ex
   \hbox{\kern\fboxrule
         \kern\dimexpr\colorframedTFtitlesep\relax
         \vbox{\hsize\dimexpr\linewidth-2\fboxrule-
                             2\dimexpr\colorframedTFtitlesep\relax\relax
               \noindent\color{TFTitleColor}%
               #1\par}}%
   \kern0.8ex}%
  \hrule\@height\ht\@tempboxa
  \kern-\ht\@tempboxa
  \box\@tempboxa
  \endgroup
  %\nointerlineskip 
  %\kern-0.04pt\relax
  \hrule\@height.5\fboxrule
  \fi
}
% maybe provide a titled-frame variant using the above and acting like
% snugshade respective to being used in a list?
\endinput