%% start of file `moderncvverticaltimeline.sty'.
%% Copyright 2023 Javier Lopez-Gomez (javier.lopez.gomez@proton.me).
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License version 1.3c,
% available at http://www.latex-project.org/lppl/.


%-------------------------------------------------------------------------------
%                identification
%-------------------------------------------------------------------------------
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{moderncvverticaltimeline}[2023/11/29 v2.0.0 modern curriculum vitae vertical timeline]


%-------------------------------------------------------------------------------
%                required packages
%-------------------------------------------------------------------------------
\RequirePackage{tikz}
\usetikzlibrary{babel}

%-------------------------------------------------------------------------------
%                vertical timeline implementation
%-------------------------------------------------------------------------------
\tikzset{
  tl_milestone/.style={circle,inner sep=1.5pt,draw=color0!20,label={west:#1}},
  tl_link/.style={thick,densely dotted,color0!20},
}

\newcounter{tl@chainidx}\setcounter{tl@chainidx}{0}
\newcounter{tl@nodeidx}\setcounter{tl@nodeidx}{0}

% Mark the end of the current chain; any `\tl@milestone` issued afterward will be on a new timeline.
\def\tl@resetchain{%
  \stepcounter{tl@chainidx}%
  \setcounter{tl@nodeidx}{0}%
}

% Create a node in the current timeline and link it to the previous node; if the previous milestone
% is on the last shipped out page, draw a line that extends until the top margin.  The argument is laid out as a label (default left).
\def\tl@milestone#1{%
  \edef\@tl@prev{tl-\thetl@chainidx-\thetl@nodeidx}%
  \stepcounter{tl@nodeidx}%
  \edef\@tl@this{tl-\thetl@chainidx-\thetl@nodeidx}%
  \tikz[remember picture,overlay] {
    \node[tl_milestone={#1}] (\@tl@this) {};
    \ifnum\thetl@nodeidx>1
      \pgfpointdiff{\pgfpointanchor{\@tl@prev}{center}}{\pgfpointanchor{\@tl@this}{center}}
      \ifnum\pgf@y>0
        \draw[tl_link] (\@tl@this) -- ([yshift=-1em] \@tl@this |- current page.north);
      \else
        \draw[tl_link] (\@tl@this) -- (\@tl@prev);
      \fi
    \fi
  }
}

\AddToHook{shipout/background}{%
  % If there are follow-up  milestones in the current timeline, draw a line that extends until the bottom margin
  \edef\@tl@prev{tl-\thetl@chainidx-\number\numexpr\thetl@nodeidx-1}%
  \edef\@tl@this{tl-\thetl@chainidx-\thetl@nodeidx}%
  \tikz[remember picture,overlay] {
    \ifnum\thetl@nodeidx>1
      \pgfpointdiff{\pgfpointanchor{\@tl@prev}{center}}{\pgfpointanchor{\@tl@this}{center}}
      \ifnum\pgf@y>0
        \draw[tl_link] (\@tl@prev) -- ([yshift=1em] \@tl@prev |- current page.south);
      \fi
    \fi
  }
}

\AtEndDocument{\tl@resetchain}

\let\@old@section=\section%
\RenewDocumentCommand{\section}{sm}{\tl@resetchain\@old@section{#1}}

\endinput


%% end of file `moderncvverticaltimeline.sty'.
