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\usepackage{amsmath,amssymb}
\usepackage{booktabs,caption}
\usepackage{luwa-ul}
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\usepackage{keisennote}

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\title{\texttt{keisennote} Package Documentation}
\author{Kosei Kawaguchi a.k.a. KKTeX}
\date{Version 1.2.1 (2026/02/02)}

\begin{document}
\begin{titlepage}
  \maketitle
\end{titlepage}
\newpage
\tableofcontents
\newpage

\section{Acknowledgements / Credit}
This package is based on the code from \href{https://qiita.com/VoD/items/6849e63b978050218d2f}{VoD's Qiita article}, 
with some improvements. The original author has kindly granted permission 
to release this as a LaTeX package. Special thanks to VoD for their contribution to the TeX community.

\section{Installation}
Place \texttt{keisennote.sty} in a directory where LaTeX can find it.
Dependencies: \texttt{xcolor}, \texttt{tikz}, \texttt{zref}, \texttt{zref-savepos}, \texttt{fp}, \texttt{kvoptions}, \texttt{pgfkeys}.

\section{Package options}
Set global defaults at load time using key-value style.
The same four keys can be changed in the middle of the document with
\texttt{\textbackslash SetKeisenNote}; see section~\ref{sec:setkeisennote}.

\bigskip
\begin{center}
  \begin{tabular}{l l p{.5\linewidth}}
    \toprule
    Option name & Default value & Description \\
    \midrule
    \texttt{linewidth} & \texttt{.5truept} & Width of the ruled lines. \\
    \texttt{radius}    & \texttt{.7truept} & Radius of dots on the lines. \\
    \texttt{distance}  & \texttt{6truemm} & Distance between lines (and dots). \\
    \texttt{triangle}  & \texttt{.7truept} & Scale of the center triangular markers. \\
    \bottomrule
  \end{tabular}
\end{center}
\bigskip

\section{Commands}
All commands below accept an optional argument in \texttt{pgfkeys} format:
\texttt{[color=..., show number=..., step=...]}.

\subsection{Notebook Style (\texttt{\textbackslash notefill}, \texttt{\textbackslash note})}
\begin{SourceCode}{Input}{TeX}
  \notefill[options]
  \note{<lines>}[options]
\end{SourceCode}

\texttt{\textbackslash notefill} automatically fills the remaining vertical space. \texttt{\textbackslash note} draws a block with the specified number of lines.

\bigskip
\textbf{Example with Line Numbers:}
\begin{SourceCode}{Input}{TeX}
  \note{5}[color=RoyalBlue, show number=true, step=1]
\end{SourceCode}
\note{5}[color=RoyalBlue, show number=true, step=1]

\subsection{Grid Style (\texttt{\textbackslash masumefill}, \texttt{\textbackslash masume})}
\begin{SourceCode}{Input}{TeX}
  \masumefill*[options]
  \masume*{<lines>}[options]
\end{SourceCode}

The starred version (\texttt{*}) draws a thick outer frame around the grid.

\bigskip
\textbf{Example with Frame:}
\begin{SourceCode}{Input}{TeX}
  \masume*{3}[color=Gray]
\end{SourceCode}
\masume*{3}[color=Gray]

\section{Dynamic Parameter Adjustment}\label{sec:setkeisennote}
You can change the layout parameters in the middle of the document with a single
command, using the same key-value style as the package options.

\begin{SourceCode}{Input}{TeX}
  \SetKeisenNote[<key>=<value>, ...]
\end{SourceCode}

\bigskip
\begin{center}
  \begin{tabular}{l l p{.5\linewidth}}
    \toprule
    Key name & Package default & Description \\
    \midrule
    \texttt{linewidth} & \texttt{.5truept} & Width of the ruled lines. \\
    \texttt{radius}    & \texttt{.7truept} & Radius of dots on the lines. \\
    \texttt{distance}  & \texttt{6truemm} & Distance between lines (and dots). \\
    \texttt{triangle}  & \texttt{.7truept} & Scale of the center triangular markers. \\
    \bottomrule
  \end{tabular}
\end{center}
\bigskip

Only the keys you actually name are changed; the others keep their current values.
Calling \texttt{\textbackslash SetKeisenNote} without an optional argument therefore
does nothing. The assignments obey the usual \TeX{} grouping, so a change made
inside a group or an environment is undone when that group ends.

\bigskip
\textbf{Example:}
\begin{SourceCode}{Input}{TeX}
  \SetKeisenNote[distance=10mm, linewidth=1pt]
  \note{3}
\end{SourceCode}
{\SetKeisenNote[distance=10mm, linewidth=1pt]\note{3}}

\bigskip
Note that \texttt{color}, \texttt{show number} and \texttt{step} are \emph{not}
handled here: they are per-drawing settings and belong in the optional argument of
\texttt{\textbackslash notefill}, \texttt{\textbackslash note},
\texttt{\textbackslash masumefill} and \texttt{\textbackslash masume}.

\subsection{Migrating from v1.2.0}
Version 1.2.1 replaced the four separate setter commands with
\texttt{\textbackslash SetKeisenNote}. The old names are no longer defined, so
documents written for v1.2.0 or earlier have to be updated as follows.

\bigskip
\begin{center}
  \begin{tabular}{l l}
    \toprule
    Removed in v1.2.1 & Replacement \\
    \midrule
    \texttt{\textbackslash SetNoteLineWidth[<dim>]}    & \texttt{\textbackslash SetKeisenNote[linewidth=<dim>]} \\
    \texttt{\textbackslash SetNoteDotRadius[<dim>]}    & \texttt{\textbackslash SetKeisenNote[radius=<dim>]} \\
    \texttt{\textbackslash SetNoteLineDistance[<dim>]} & \texttt{\textbackslash SetKeisenNote[distance=<dim>]} \\
    \texttt{\textbackslash SetNoteTriangleSize[<dim>]} & \texttt{\textbackslash SetKeisenNote[triangle=<dim>]} \\
    \bottomrule
  \end{tabular}
\end{center}
\bigskip

One behavioural difference is worth noting: the old commands reset the parameter to
its package default when their optional argument was omitted. There is no equivalent
shorthand now --- to go back to a default, state the value explicitly, for example
\texttt{\textbackslash SetKeisenNote[distance=6truemm]}.

\section{Technical Notes}
\begin{itemize}
  \item \textbf{Multiple Compilations:} Commands like \texttt{\textbackslash notefill} use \texttt{zref-savepos} to determine the available space. You must compile the document \textbf{at least twice} to ensure the lines are drawn correctly.
  \item \textbf{Line Numbers:} The \texttt{show number} option displays the line count. For \texttt{\textbackslash note}, it counts down to 1. For \texttt{\textbackslash notefill}, it calculates the total capacity of the space.
\end{itemize}

\section{Examples}

\subsection{Full Page Notebook Fill}
\begin{SourceCode}{Input}{TeX}
  \notefill[color=lightgray, show number=true]
\end{SourceCode}
(See the next page for the result.)
\newpage
\notefill[color=lightgray, show number=true]

\newpage

\section{License}
Released under the MIT License.

\section{Version History}
\begin{itemize}
  \item \textbf{v1.0.0 -- v1.0.4a} --- Initial versions, added grid commands and package options.
  \item \textbf{v1.2.0 (2025/12/30)} --- Added \texttt{pgfkeys} support for command options, improved \texttt{\textbackslash masume*} border logic, and changed license.
  \item \textbf{v1.2.1 (2026/02/02)} --- The four separate parameter setters were replaced by the single key-value command \texttt{\textbackslash SetKeisenNote} (see section~\ref{sec:setkeisennote}); internal clean-up of the package code.
\end{itemize}

\section{Source Code}
The complete package source is reproduced below, so that the listing can never
drift away from the code that is actually shipped.

\lstinputlisting[language=TeX]{keisennote.sty}
\end{document}