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%% symbol library for TikZ track schematics
%
% Copyright (c) 2018 - 2022, Martin Scheidt (ISC license)
%
% Permission to use, copy, modify, and/or distribute this file for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.
%
\ProvidesFileRCS{tikzlibrarytrackschematic.measures.code.tex}%
%
%%%%%%%%%%%%%%%
% global settings
%%%%%%%%%%%%%%%
\RequirePackage{tikz,etoolbox}%
\usetikzlibrary{calc,intersections,arrows.meta}%
%
%%%%%%%%%%%%%%%
% tikz keys for multiple use
%%%%%%%%%%%%%%%
\ifdeflength{\objectlength}{}{% Not defined, so define it!
  \newlength{\objectlength}%
}%
\setlength{\objectlength}{4cm}%
%
\pgfkeys{%
  /tikz/trackschematic/.is family,%
  /tikz/trackschematic/.cd,%
  %% color foreground
  foreground/.store in=\foreground,%
  foreground=black,% DEFAULT
  /tikz/foreground/.forward to=/tikz/trackschematic/foreground,%
  %% color background
  background/.store in=\background,%
  background=white,% DEFAULT
  /tikz/background/.forward to=/tikz/trackschematic/background,%
  %% face
  face/.value required,% forward, backward OR bidirectional
  face/.store in=\face,% forward, backward OR bidirectional
  /tikz/face/.forward to=/tikz/trackschematic/face,%
  /tikz/forward/.code={\pgfkeys{/tikz/trackschematic/face=forward}},%
  /tikz/backward/.code={\pgfkeys{/tikz/trackschematic/face=backward}},%
  /tikz/bidirectional/.code={\pgfkeys{/tikz/trackschematic/face=bidirectional}},%
  %% length
  length/.store in=\objectlength,% default length 4cm
  /tikz/length/.forward to=/tikz/trackschematic/length,%
  %% traffic practice
  traffic practice/.value required,% left OR right
  traffic practice/.store in=\trafficpractice,%
  /tikz/traffic practice/.forward to=/tikz/trackschematic/traffic practice,%
  /tikz/position/.forward to=/tikz/trackschematic/traffic practice,%
  %% label
  shift label/.store in=\labelcoord,% (coord)
  shift label=(none),% DEFAULT
  /tikz/shift label/.forward to=/tikz/trackschematic/shift label,%
}%
\tikzset{traffic practice=right}%
%
% tikz keys
\pgfkeys{%
  /tikz/trackschematic/measures/.is family,%
  /tikz/trackschematic/measures/.cd,%
  %% color hectometer
  color/.store in=\hectometercolor,%
  color=\foreground!50!\background,% DEFAULT
  /tikz/hectometer color/.forward to=/tikz/trackschematic/measures/color,%
}%
%%%%%%%%%%%%%%%%
% symbol train berth
%%%%%%%%%%%%%%%
%% command
\newcommand\berth{}% just for safety
\def\berth[#1]#2(#3)#4(#5){% \berth[options] at (coord) length (usable length);
  \pic[#1] at (#3) {train_berth={#2/#4/#5}}% symbol
}%
%% 
%% symbol definition
\tikzset{%
  pics/train_berth/.default=,%
  pics/train_berth/.style args={#1/#2/#3}{code={%
    %% settings
    \def\coordcommand{#1}% beware of leading and tailing spaces!
    \def\labelcommand{#2}% beware of leading and tailing spaces!
    \def\labelcontent{#3}%
    %% face setup
    \ifdefstring{\face}{bidirectional}{% face
      \pgfmathsetmacro{\facefactor}{1}%
    }{%
      \ifdefstring{\face}{forward}{% face
        \pgfmathsetmacro{\facefactor}{1}%
      }{%
        \ifdefstring{\face}{backward}{% face
          \pgfmathsetmacro{\facefactor}{-1}%
        }{% error message
          \pgfkeys{/errors/unknown choice value={/tikz/trackschematic/face}{“forward“, “backward“ OR “bidirectional“ as key required}}%
        }%
      }%
    }% end \ifdefstring{\face}
    %% traffic practice setup
    \ifdefstring{\trafficpractice}{left}{% branch
      \pgfmathsetmacro{\trafficfactor}{-1}%
    }{%
      \ifdefstring{\trafficpractice}{right}{% branch
        \pgfmathsetmacro{\trafficfactor}{1}%
      }{% error message
        \pgfkeys{/errors/unknown choice value={/tikz/trackschematic/trafficcontrol/traffic practice}{“left“ OR “right“ as key required}}%
      }%
    }% end \ifdefstring{\trafficpractice}
    %
    \tikzset{every path/.style={draw=\foreground,line width=0.75pt,line cap=round,dash pattern=on 0pt off 2.4\pgflinewidth}};%
    \path% berth shape forward
      ($-0.5*(\objectlength,0) + (-0.05,0) + \trafficfactor*\facefactor*(0,-0.25)$) --%
      ($-0.5*(\objectlength,0) + (-0.05,0) + \trafficfactor*\facefactor*(0,-0.35)$)%
      ($-0.5*(\objectlength,0) + (-0.05,0) + \trafficfactor*\facefactor*(0,-0.35) + (\pgflinewidth,0)$) --%
      ($ 0.5*(\objectlength,0) + ( 0.05,0) + \trafficfactor*\facefactor*(0,-0.35)$)%
      ($ 0.5*(\objectlength,0) + ( 0.05,0) + \trafficfactor*\facefactor*(0,-0.25)$) --%
      ($ 0.5*(\objectlength,0) + ( 0.05,0) + \trafficfactor*\facefactor*(0,-0.35)$);% berth shape forward
    \path[draw=none,fill=\foreground]% arrow front
      ($\facefactor*0.5*(\objectlength,0) + \facefactor*(-0.1,0) + \trafficfactor*\facefactor*(0,-0.35)$) --%
      ++($(0,-0.04) + \facefactor*(-0.1,0)$) -- ++(0,0.08) -- cycle;% arrow
    \path[draw=none,fill=\foreground]% arrow back
      ($\facefactor*-0.5*(\objectlength,0) + \facefactor*(0.2,0) + \trafficfactor*\facefactor*(0,-0.35)$) --%
      ++($(0,-0.04) + \facefactor*(-0.1,0)$) -- ++(0,0.08) -- cycle;% arrow
    \ifdefstring{\face}{bidirectional}{% bidirectional
      \pgfmathsetmacro{\facefactor}{-1}%
      \path% berth shape forward
        ($-0.5*(\objectlength,0) + (-0.05,0) + \trafficfactor*\facefactor*(0,-0.25)$) --%
        ($-0.5*(\objectlength,0) + (-0.05,0) + \trafficfactor*\facefactor*(0,-0.35)$)%
        ($-0.5*(\objectlength,0) + (-0.05,0) + \trafficfactor*\facefactor*(0,-0.35) + (\pgflinewidth,0)$) --%
        ($ 0.5*(\objectlength,0) + ( 0.05,0) + \trafficfactor*\facefactor*(0,-0.35)$)%
        ($ 0.5*(\objectlength,0) + ( 0.05,0) + \trafficfactor*\facefactor*(0,-0.25)$) --%
        ($ 0.5*(\objectlength,0) + ( 0.05,0) + \trafficfactor*\facefactor*(0,-0.35)$);% berth shape forward
      \path[draw=none,fill=\foreground]% arrow front
        ($\facefactor*0.5*(\objectlength,0) + \facefactor*(-0.1,0) + \trafficfactor*\facefactor*(0,-0.35)$) --%
        ++($(0,-0.04) + \facefactor*(-0.1,0)$) -- ++(0,0.08) -- cycle;% arrow
      \path[draw=none,fill=\foreground]% arrow back
        ($\facefactor*-0.5*(\objectlength,0) + \facefactor*(0.2,0) + \trafficfactor*\facefactor*(0,-0.35)$) --%
        ++($(0,-0.04) + \facefactor*(-0.1,0)$) -- ++(0,0.08) -- cycle;% arrow
    }{}%
    %% label
    \ifdefstring{\labelcontent}{}{}{% label NOT empty
      \node[fill=\background,text=\foreground,inner sep=1pt] at ($\facefactor*(0,-0.35)$) {\tiny \labelcontent};%
      \ifdefstring{\face}{bidirectional}{% bidirectional
        \pgfmathsetmacro{\facefactor}{1}%
        \node[fill=\background,text=\foreground,inner sep=1pt] at ($\facefactor*(0,-0.35)$) {\tiny \labelcontent};%
      }{}%
    }%
  }},% END pics/train_berth/.style args={#1/#2/#3}
  % symbology entry
  symbology_train_berth/.pic = {%
    \maintrack (0,0) -- (6,0);%
    \berth[forward] at (3,0) length (length);%
  },%
}%
%
%%%%%%%%%%%%%%%
% symbol track distance
%%%%%%%%%%%%%%%
%
%% command
\newcommand\trackdistance{}% just for safety
\def\trackdistance#1(#2)#3(#4)#5(#6){% \trackdistance between (coord1) and (coord2) distance (distance);
  \path[draw=\background,<->,>={Stealth[\foreground,inset=0pt,angle=50:0.2cm]},shorten <=1pt,shorten >=1pt] (#2) -- (#4)% arrow tips
  node[hectometer base=(current bounding box.center),text=\foreground,midway,sloped,rotate=90] {#6};% label
}%
% symbology entry
\tikzset{%
  symbology_track_distance/.pic = {%
    \maintrack (0,-0.5) -- (6,-0.5);%
    \maintrack (0, 0.5) -- (6, 0.5);%
    \trackdistance between (3, 0.5) and (3,-0.5) distance (distance);%
  },%
}%
%
%%%%%%%%%%%%%%%
% symbol hectometer posts
%%%%%%%%%%%%%%%
%
%% command
\newcommand\hectometer{}% just for safety
\def\hectometer[#1]#2(#3)#4(#5){% \hectometer[options] at (coord) label (name);
  \pic[#1] at (#3) {hectometer_posts={#2/#4/#5}}% symbol
}%
% tikz keys
\pgfkeys{%
  /tikz/trackschematic/measures/hectometer/.is family,%
  /tikz/trackschematic/measures/hectometer/.cd,%
  %% hectometer base
  base/.value required,%
  base/.store in=\basecoord,%
  /tikz/hectometer base/.forward to=/tikz/trackschematic/measures/hectometer/base,%
  %% hectometer base
  orientation/.value required,%
  orientation/.store in=\orientation,%
  /tikz/orientation/.forward to=/tikz/trackschematic/measures/hectometer/orientation,%
}%
%% symbol definition
\tikzset{%
  pics/hectometer_posts/.default=,%
  pics/hectometer_posts/.style args={#1/#2/#3}{code={%
    %% settings
    \def\coordcommand{#1}% beware of leading and tailing spaces!
    \def\labelcommand{#2}% beware of leading and tailing spaces!
    \def\labelcontent{#3}%
    %
    %% orientation setup
    \ifdefstring{\orientation}{left}{% orientation
      \def\align{right}%
    }{%
      \ifdefstring{\orientation}{right}{% orientation
        \def\align{left}%
      }{% error message
        \pgfkeys{/errors/unknown choice value={/tikz/trackschematic/measures/hectometer/orientation}{“left“ OR “right“ as key required}}%
      }%
    }% end \ifdefstring{\orientation}
    %% calculation of coordinates
    %%
    %%                  bend 1       bend 2
    %%       (0,0.75) (ts-hm-b1)  (ts-hm-b2)
    %% (0,0)•   • ------- • --------- • ----- •(ts-hm-l) label
    %%
    \path let \p1=\basecoord in coordinate (ts-hm-l) at (0,\y1);%
    \ifdefstring{\labelcoord}{(none)}{%
      \coordinate (ts-hm-b1) at (ts-hm-l);%
      \coordinate (ts-hm-b2) at (ts-hm-l);%
    }{% initialize if NOT default
      \coordinate (ts-hm-b1) at ($(ts-hm-l) + (0,0.5)$);%
      \path let \p1=\labelcoord in coordinate (ts-hm-b2) at ($(ts-hm-l) + (\x1,0.25)$);%
      \path let \p1=\labelcoord in coordinate (ts-hm-l)  at ($(ts-hm-l) + (\x1,\y1)$);%
    }%
    %% symbol
    \path[draw=\hectometercolor,dashed,shorten <=0.75cm]%
      (0,0) -- (ts-hm-b1) -- (ts-hm-b2) -- (ts-hm-l);%
    %% label
    \ifdefstring{\labelcontent}{}{}{% label NOT empty
      \node[font=\sffamily,text=\hectometercolor,rotate=-90,\orientation,align=\align,fill=\background] at (ts-hm-l) {\labelcontent};%
    }%
  }},% END
  % symbology entry
  symbology_hectometer/.pic = {%
    \tikzset{hectometer base={(0,-2)},orientation=right};%
    \hectometer[] at (0,0)  mileage (hectometer 1);%
    \hectometer[] at (3,0) mileage (hectometer 2);%
    \hectometer[shift label={(0.3,0)}] at (3.5,0) mileage (hectometer 3);%
    \hectometer[] at (6,0)  mileage (hectometer 4);%
  },%
}%
%
%%%%%%%%%%%%%%%
% symbol measureline
%%%%%%%%%%%%%%%
%
% command
\newcommand\measureline{}% just for safety
\def\measureline{\path[MeasureLine]}% \measureline (coord1) -- (coord2);
%
\tikzset{%
  MeasureLine/.style={draw=\hectometercolor,dashed,shorten <=0.75cm,shorten >=0.75cm},
  % symbology entry
  symbology_measure_line/.pic = {%
    \measureline (0,0) -- (6,0);%
  },%
}%
%%%%%%%%%%%%%%%
% symbol track marking
%%%%%%%%%%%%%%%
%
% command
\newcommand\trackmarking{}% just for safety
\def\trackmarking[#1]{\path[draw,TrackMark,#1]}% \trackmarking[color] (coord1) -- (coord2);
%
\tikzset{%
  TrackMark/.style={line width=8pt, opacity=0.4, arrows = {Bar[line cap=round,line width=1pt,width=12pt]-Bar[line cap=round,line width=1pt,width=12pt]},shorten >=1pt,shorten <=1pt},
  % symbology entry
  symbology_track_marking/.pic = {%
    \maintrack (0,0) -- (6,0);%
    \trackmarking[] (1,0) -- (5,0);%
  },%
}%
%
%%%%%%%%%%%%%%%
% TODO:
% * platform length
% * direction of milage
%
%%%%%%%%%%%%%%%
\endinput%
%