Cover generating code in the TU Delft LaTeX template

LaTeX.cls

%% The coverimage command is used to specify the filename of the optional cover
%% image.
\newcommand*\coverimage[1]{\def\@cover@image{#1}}
%% The covertext command can be used to specify the text printed on the back
%% cover. This text is inserted in a minipage environment and can therefore
%% include line breaks.
\newcommand\covertext[2][tudelft-white]{%
%    \def\@subtitle{#1}%
    \def\@covertextcolor{#1}%
    \def\@cover@text{#2}}

%% The cover image is scaled to fill the width of the front cover.
\newlength\@cover@imagewidth
%% The width of the spine if a back cover is present.
\newlength\@cover@spinewidth
\setlength\@cover@spinewidth{0.375in}
%% Width and height of the boxes on the front and back cover.
\newlength\@cover@frontboxwidth
\setlength\@cover@frontboxwidth{4.375in}
\newlength\@cover@frontboxheight
\setlength\@cover@frontboxheight{2.1875in}
\newlength\@cover@fronttextwidth
\newlength\@cover@fronttextheight
\newlength\@cover@splitboxwidth
\setlength\@cover@splitboxwidth{6.375in}
\newlength\@cover@splitboxheight
\setlength\@cover@splitboxheight{0.5\paperheight}
\newlength\@cover@splitboxtextwidth
\newlength\@cover@splittextheight
%% Position on the front cover where the corner of both boxes meet.
\newlength\@cover@x
\setlength\@cover@x{0.8125in}
\newlength\@cover@y
\setlength\@cover@y{3in}
\newlength\@cover@ax
\setlength\@cover@ax{0.6125in}
\newlength\@cover@ay
\setlength\@cover@ay{5in}
%% The margin around text boxes.
\newlength\@cover@margin
\setlength\@cover@margin{12pt}

%% Define the options for the makecover command.
\define@boolkey{cover}{back}[true]{}
\define@boolkey{cover}{split}[true]{}
\define@boolkey{cover}{nospine}[true]{}
\define@boolkey{cover}{frontbottom}[true]{}
\define@boolkey{cover}{whitelogo}[true]{}
\define@key{cover}{spinewidth}{\setlength\@cover@spinewidth{#1}}
\define@key{cover}{frontboxwidth}{\setlength\@cover@frontboxwidth{#1}}
\define@key{cover}{frontboxheight}{\setlength\@cover@frontboxheight{#1}}
%\define@key{cover}{backboxwidth}{\setlength\@cover@backboxwidth{#1}}
%\define@key{cover}{backboxheight}{\setlength\@cover@backboxheight{#1}}
\define@key{cover}{x}{\setlength\@cover@x{#1}}
\define@key{cover}{y}{\setlength\@cover@y{#1}}
\define@key{cover}{ax}{\setlength\@cover@ax{#1}}
\define@key{cover}{ay}{\setlength\@cover@ay{#1}}
\define@key{cover}{margin}{\setlength\@cover@margin{#1}}
\newcommand\titleoffsetx[1]{\def\@cover@x{#1}}
\newcommand\titleoffsety[1]{\def\@cover@y{#1}}
\newcommand\afiloffsetx[1]{\def\@cover@ax{#1}}
\newcommand\afiloffsety[1]{\def\@cover@ay{#1}}
\newcommand\setpagecolor[1]{\def\@pagecolor{#1}}

\newcommand*\makecover[1][]{
    \setkeys{cover}{#1}
    %% Create a \@pagecolor empty page without margins.
    \clearpage
    \newgeometry{margin=0pt}
    \pagecolor{\@pagecolor}
    \thispagestyle{empty}
    %% We need the this to perform coordinate calculations in TikZ.
    \usetikzlibrary{calc}
    \begin{tikzpicture}[remember picture,overlay]
        \ifKV@cover@nospine
            \setlength\@cover@spinewidth{0pt}
        \fi
        %% If a back cover is present, stretch the cover image to extend onto
        %% the spine.
        \ifKV@cover@back
            \setlength\@cover@imagewidth{0.5\paperwidth}
            \addtolength\@cover@imagewidth{0.5\@cover@spinewidth}
        \else
            \setlength\@cover@imagewidth{\paperwidth}
        \fi
        %% If a cover image was specified, attach it to the top right of the
        %% front cover.
        \ifx\@cover@image\undefined\else
          \ifKV@cover@back
            {\ifKV@cover@split
               \node[anchor=north west,inner sep=0pt] at (current page.center) {
               \includegraphics[width=\@cover@imagewidth]{\@cover@image}};
            \else
               \node at (current page.north east)[anchor=north east,inner sep=0pt]{
               \includegraphics[width=\@cover@imagewidth]{\@cover@image}};
            \fi}
          \else
            {\ifKV@cover@split
               \node[anchor=north west,inner sep=0pt] at (current page.west) {
               \includegraphics[width=\@cover@imagewidth]{\@cover@image}};
            \else
               \node at (current page.north east)[anchor=north east,inner sep=0pt]{
               \includegraphics[width=\@cover@imagewidth]{\@cover@image}};
            \fi}
          \fi
        \fi
        \ifKV@cover@whitelogo
          \ifKV@cover@back
              \node at (current page.south west)[anchor=south west,inner sep=20pt]{
                  \includegraphics{cover/logo_white}
              };
              \node at (current page.south east)[anchor=south east,inner sep=20pt]{
                  \includegraphics{cover/logo_white}
              };
          \else
              \node at (current page.south west)[anchor=south west,inner sep=20pt]{
                  \includegraphics{cover/logo_white}
              };
          \fi
        \else
          \ifKV@cover@back
              \node at (current page.south west)[anchor=south west,inner sep=20pt]{
                  \includegraphics{cover/logo_black}
              };
              \node at (current page.south east)[anchor=south east,inner sep=20pt]{
                  \includegraphics{cover/logo_black}
              };
          \else
              \node at (current page.south west)[anchor=south west,inner sep=20pt]{
                  \includegraphics{cover/logo_black}
              };
          \fi
        \fi
        %% Calculate the coordinate of the top left corner of the front cover.
        \ifKV@cover@back
            \coordinate (top left) at ($(current page.north)+(0.5\@cover@spinewidth,0pt)$);
        \else
            \coordinate (top left) at (current page.north west);
        \fi
        \ifKV@cover@back
            \coordinate (bottom left) at ($(current page.south)+(0.5\@cover@spinewidth,0pt)$);
        \else
            \coordinate (bottom left) at (current page.south west);
        \fi
        \ifKV@cover@back\ifKV@cover@nospine\else
            %% If a back cover is present, calculate the coordinates of the
            %% spine box.
            \coordinate (spine top left) at ($(top left)-(\@cover@spinewidth,0pt)$);
            \coordinate (spine bottom right) at ($(top left)+(0pt,-\@cover@y)$);
            \ifKV@cover@frontbottom
                \coordinate (spine bottom right) at ($(spine bottom right)+(0pt,\@cover@backboxheight)$);
            \fi
            \coordinate (spine bottom center) at ($(spine bottom right)+(-0.5\@cover@spinewidth,0pt)$);
            %% Extend the spine box by 1pt to the left to ensure it completely
            %% covers the cover image.
            \coordinate (spine top left) at ($(spine top left)-(1pt,0pt)$);
            %% Draw a black box on the spine.
            \fill[fill=tudelft-black](spine top left) rectangle (spine bottom right);
            %% Print the title on the center right of the spine box.
            \node at (spine bottom center)[rotate=-90,anchor=east,inner sep=\@cover@margin]{
                \tudsffamily\color{tudelft-white}\LARGE\@title
            };
        \fi\fi
        %% Calculate the coordinate of the corner where the front and back boxes
        %% meet.
        \ifKV@cover@split
          \setlength\@cover@fronttextwidth{\@cover@splitboxwidth}
          \addtolength\@cover@fronttextwidth{-2\@cover@margin}
          \setlength\@cover@fronttextheight{\@cover@splitboxheight}
          \addtolength\@cover@fronttextheight{-4\@cover@margin}
          \coordinate (tcorner) at ($(top left)+(2\@cover@margin,-2\@cover@margin)$);
          \coordinate (front top left) at (tcorner);
%%          \coordinate (back top left) at ($(tcorner)+(-\@cover@backboxwidth,\@cover@backboxheight)$);     
          \node at (front top left)[anchor=north west,inner sep=\@cover@margin]{
             \begin{minipage}[t][\@cover@fronttextheight]{\@cover@fronttextwidth}
                 %% Print the title and optional subtitle at the top in white.
                   {\titlefont\color{\@titlecolor}\fontsize{58}{58}\selectfont\@title}
                    \ifx\@subtitle\undefined\else
%                     \\[3mm]
                     \vfill
                     
                     {\titlefont\color{\@subtitlecolor}\fontsize{52}{52}\selectfont\@subtitle}
                   \fi
                 %% Print the author.
                   \vfill
                  
                   {\titlefont\color{\@authorcolor}\fontsize{52}{52}\selectfont\@author}
                   \ifx\@cover@text\undefined\else
                     \vfill
                     
                     {\titlefont\color{\@covertextcolor}\fontsize{18}{18}\selectfont\@cover@text}
                   \fi
             \end{minipage};
            };
        \else
          \coordinate (tcorner) at ($(top left)+(\@cover@x,-\@cover@y)$);
          \coordinate (acorner) at ($(top left)+(\@cover@ax,-\@cover@ay)$);
  %        \coordinate (lcorner) at ($(bottom left)+(2cm,2cm)$);
          %% Calculate the top left and bottom right coordinates of the front and
          %% back boxes.
          \ifKV@cover@frontbottom
              \coordinate (front top left) at (tcorner);
              \coordinate (back top left) at ($(tcorner)+(-\@cover@splitboxwidth,\@cover@splitboxheight)$);
          \else
              \coordinate (front top left) at ($(tcorner)+(0pt,\@cover@frontboxheight)$);
              \coordinate (back top left) at ($(tcorner)+(-\@cover@splitboxwidth,0pt)$);
          \fi
          \coordinate (front bottom right) at ($(front top left)+(\@cover@frontboxwidth,-\@cover@frontboxheight)$);
          \coordinate (back bottom right) at ($(back top left)+(\@cover@splitboxwidth,-\@cover@splitboxheight)$);
          %% Draw the front box in black.
  %        \fill[fill=tudelft-black](front top left) rectangle (front bottom right);
          %% Calculate the width and height of the front text box.
          \setlength\@cover@fronttextwidth{\@cover@frontboxwidth}
          \addtolength\@cover@fronttextwidth{-2\@cover@margin}
          \setlength\@cover@fronttextheight{\@cover@frontboxheight}
          \addtolength\@cover@fronttextheight{-2\@cover@margin}
          %% Create the front text box.
          \node at (front top left)[anchor=north west,inner sep=\@cover@margin]{
              \begin{minipage}[t][\@cover@fronttextheight]{\@cover@fronttextwidth}
                  %% Print the title and optional subtitle at the top in white.
                  {\largetitlestyle\color{\@titlecolor}\fontsize{96}{96}\selectfont\@title}
  %                {\tudsffamily\color{\@titlecolor}\fontsize{96}{96}\selectfont\@title}
                  \ifx\@subtitle\undefined\else
                      \\[3mm]
                      {\tudsffamily\color{\@subtitlecolor}\fontsize{22}{32}\selectfont\@subtitle}
                  \fi
                  %% Print the author at the bottom in cyan.
                  \vfill
  %                {\tudtitlefamily\color{\@authorcolor}\fontsize{26}{26}\selectfont\@author}
                  {\largetitlestyle\color{\@authorcolor}\fontsize{26}{26}\selectfont\@author}
              \end{minipage}
          };
          %% Draw the back box in cyan.
  %        \fill[fill=tudelft-cyan](back top left) rectangle (back bottom right);
          %% Print the affiliation.
          \ifx\@affiliation\undefined\else
  %            \node at (back bottom right)[rotate=90,anchor=south west,inner sep=\@cover@margin]{
              \node at (acorner)[rotate=90,anchor=south west,inner sep=\@cover@margin]{
                  \tudsffamily\color{\@afilcolor}\@affiliation
              };
          \fi
%          \ifKV@cover@back\ifx\@cover@text\undefined\else
%              %% Calculate the width and height of the back text box.
%              \setlength\@cover@backtextwidth{\@cover@backboxwidth}
%              \addtolength\@cover@backtextwidth{-2\@cover@margin}
%              \setlength\@cover@backtextheight{\@cover@backboxheight}
%              \addtolength\@cover@backtextheight{-2\@cover@margin}
%              %% Create the back text box.
%              \node at (back top left)[anchor=north west,inner sep=\@cover@margin]{
%                  \begin{minipage}[t][\@cover@backtextheight]{\@cover@backtextwidth}
%                      \tudsffamily\color{tudelft-white}\@cover@text
%                  \end{minipage}
%              };
%          \fi
         
       \fi
    \end{tikzpicture}
    %% Restore the margins and turn the page white again.
    \restoregeometry
    \pagecolor{white}
}