% ac-paper-layout.sty — Aesthetic Computer paper layout master template
% Usage: \usepackage{ac-paper-layout} in each arxiv-* paper
%
% This package provides the shared visual identity for all AC working drafts:
%   - AC color palette
%   - YWFT Processing font commands (\acbold, \aclight)
%   - Draft watermark in Processing Light font
%   - Pals logo watermark (top-left, rotated, semi-opaque)
%   - Section/subsection formatting
%   - Header/footer (draft notice + page numbers)
%   - List and paragraph settings
%   - \ac command for "Aesthetic Computer" small caps
%
% Papers still define their own:
%   - \hypersetup{pdftitle=...}
%   - \graphicspath{...}
%   - Additional \newcommand macros (e.g. \wg, \acos)
%   - Extra packages (listings, multicol, etc.)
%   - Extra font families (ComicRelief for KidLisp, etc.)

\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{ac-paper-layout}[2026/03/16 Aesthetic Computer paper layout]

% === FONTS ===
% Requires fontspec (loaded by the document before this package)
\newfontfamily\acbold{ywft-processing-bold}[
  Path=../../system/public/type/webfonts/,
  Extension=.ttf
]
\newfontfamily\aclight{ywft-processing-light}[
  Path=../../system/public/type/webfonts/,
  Extension=.ttf
]

% === COLORS (AC palette) ===
\definecolor{acpink}{RGB}{180,72,135}
\definecolor{acpurple}{RGB}{120,80,180}
\definecolor{acdark}{RGB}{64,56,74}
\definecolor{acgray}{RGB}{119,119,119}
\definecolor{draftcolor}{RGB}{180,72,135}

% === DRAFT WATERMARK (Processing font + pals logo) ===
\RequirePackage{eso-pic}
\RequirePackage{tikz}
\usetikzlibrary{shadows.blur}
\AddToShipoutPictureBG{%
  \begin{tikzpicture}[remember picture, overlay]
    % --- Pals logo stamps: mirroring bios.mjs side-stamp pattern
    %     (drawTextAtPosition(0, 90) on the left, (canvasWidth, -90) on the right).
    %     Both pals stamps anchored to their respective page edges, one-third of
    %     the way down from the top. Rotated +90 / -90 so they run vertically up
    %     each side. Sinusoidally wiggling per page, semi-opaque, drop-shadowed,
    %     bleeding off the edge. ---
    \pgfmathsetmacro{\palswiggle}{7*sin(\thepage * 67)}%
    \node[opacity=0.10, anchor=center, rotate={90 + \palswiggle},
          blur shadow={shadow blur steps=5, shadow blur extra rounding=1pt,
                       shadow xshift=4pt, shadow yshift=-4pt, shadow opacity=0.18}]
      at ([xshift=-1.0cm, yshift=-0.33\paperheight]current page.north west)
      {\includegraphics[width=14cm]{pals}};
    \node[opacity=0.10, anchor=center, rotate={-90 + \palswiggle},
          blur shadow={shadow blur steps=5, shadow blur extra rounding=1pt,
                       shadow xshift=-4pt, shadow yshift=-4pt, shadow opacity=0.18}]
      at ([xshift=1.0cm, yshift=-0.33\paperheight]current page.north east)
      {\includegraphics[width=14cm]{pals}};
    % --- "WORKING DRAFT" text in Processing Light font ---
    \node[opacity=0.12, rotate=45, anchor=center]
      at (current page.center)
      {{\aclight\fontsize{2.5cm}{3cm}\selectfont\color{acpink} WORKING DRAFT}};
  \end{tikzpicture}%
}

% === SECTION FORMATTING ===
\RequirePackage{titlesec}
\titleformat{\section}
  {\normalfont\bfseries\normalsize\uppercase}
  {\thesection.}
  {0.5em}
  {}
\titlespacing{\section}{0pt}{1.2em}{0.3em}

\titleformat{\subsection}
  {\normalfont\bfseries\small}
  {\thesubsection}
  {0.5em}
  {}
\titlespacing{\subsection}{0pt}{0.8em}{0.2em}

% === HEADER/FOOTER ===
\RequirePackage{fancyhdr}
\pagestyle{fancy}
\fancyhf{}
\renewcommand{\headrulewidth}{0pt}
\fancyhead[C]{\footnotesize\color{acpink}\textit{Working Draft --- not for citation}}
\fancyfoot[C]{\footnotesize\thepage}

% === LIST SETTINGS ===
\RequirePackage{enumitem}
\setlist[itemize]{nosep, leftmargin=1.2em, itemsep=0.1em}
\setlist[enumerate]{nosep, leftmargin=1.2em}

% === PARAGRAPH SETTINGS ===
\setlength{\columnsep}{1.8em}
\setlength{\parindent}{1em}
\setlength{\parskip}{0.3em}

% === HYPERREF COLORS ===
\RequirePackage{hyperref}
\RequirePackage{xurl}
\hypersetup{
  colorlinks=true,
  linkcolor=acpurple,
  urlcolor=acpurple,
  citecolor=acpurple,
}

% === COMMON COMMANDS ===
\newcommand{\ac}{\textsc{Aesthetic Computer}}
\newcommand{\acdot}{{\color{acpink}.}}

% === BREAKABLE CODE (\code) ===
% \code{...} sets its argument in \ttfamily and lets long identifiers, paths,
% env-var names, op:// refs, and tokens WRAP instead of overflowing the measure
% (in body text and inside tabularx/p{} cells alike) — so nothing breaks the
% columnar arrangement. It breaks after the separators _ / . : - @ (preferred,
% zero cost) and, only when a separator break would still overflow, between any
% two characters (last resort, high penalty) so even a separator-less blob
% wraps. The argument is re-tokenized wholesale (\scantokens) under active
% separators rather than scanned token-by-token, so \char-based content
% survives, e.g. \code{\char`\~/.hermes/config.yaml} keeps its ~, and \#, \$
% escapes render as usual. Gate any paper with tools/check-columns.mjs.
\newcommand{\codebreak}{\discretionary{}{}{}}   % zero-cost break at separators
\newcommand{\codesoftbreak}{\penalty9999\relax} % last-resort break in long runs
\begingroup
  \catcode`\_=12 \catcode`\/=12 \catcode`\.=12
  \catcode`\:=12 \catcode`\-=12 \catcode`\@=12
  \gdef\codeUS{_}\gdef\codeSL{/}\gdef\codeDT{.}%
  \gdef\codeCL{:}\gdef\codeDS{-}\gdef\codeAT{@}%
\endgroup
\begingroup
  \catcode`\_=\active \catcode`\/=\active \catcode`\.=\active
  \catcode`\:=\active \catcode`\-=\active \catcode`\@=\active
  \gdef\codeActivate{%
    \def_{\codeUS\codebreak}\def/{\codeSL\codebreak}\def.{\codeDT\codebreak}%
    \def:{\codeCL\codebreak}\def-{\codeDS\codebreak}\def@{\codeAT\codebreak}%
    \def\_{\codeUS\codebreak}}% underscores usually arrive as the \_ macro
\endgroup
\newcommand{\code}[1]{%
  \begingroup
    \ttfamily
    \catcode`\_=\active \catcode`\/=\active \catcode`\.=\active
    \catcode`\:=\active \catcode`\-=\active \catcode`\@=\active
    \codeActivate
    \ifdefined\XeTeXinterchartokenstate
      \XeTeXinterchartokenstate=1
      \XeTeXinterchartoks 0 0 = {\codesoftbreak}%
    \fi
    \endlinechar=-1 \everyeof{}%
    \scantokens{#1}%
  \endgroup}

\endinput