<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">%% Thumby - LaTeX package for creating thumb indexes.
%
%  Version: 0.1
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Requirements:
%
%   - memoir document class
%
%   - Packages:
%
%       - PerlTeX
%       - tikz
%       - bophook
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Instructions:
%
% Put something like the following in your document (we'll call it "foo.tex"):
%
%     \documentclass[twoside]{memoir}
%
%     \usepackage{thumby}
%
%     \thumbySides{two}
%     \thumbyTotalChapters{10}
%     \thumbyPageHeight{792}
%     \thumbyThumbWidth{42.5}
%     \thumbyForeground{white}
%     \thumbyBackground{black}
%     \thumbyNumberFormat{\Huge\textbf{$chapter_number}}
%
%     \thumbySetup
%
% Then, run twice:
%
%     perltex --latex=pdflatex foo.tex
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Please change the above to reflect your document and preferences.
% In particular, you should change the \thumbyTotalChapters from 10 to the number
% of chapters in your document, and the \thumbyPageHeight from 792 to the height
% of your document (in points), and \thumbySides to reflect whether your document
% uses one- or two-sided pages.
%
% Note: Units for page height, width, etc, are in points.
%
% Note: Only normal, numbered chapters will have a thumb index.
%       For example, the of contents and \frontmatter chapters will not have a thumb index.
%
% Note: When \thumbyNumberFormat contains the literal $chapter_number
%       Thumby will substitute the actual chapter number for this literal.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%   Thumby - LaTeX package for creating thumb indexes.
%
%   Copyright (C) 2010  Sergey Goldgaber
%
%   This program is free software: you can redistribute it and/or modify
%   it under the terms of version 3 of the GNU General Public License
%   as published by the Free Software Foundation.
%
%   This program is distributed in the hope that it will be useful,
%   but WITHOUT ANY WARRANTY; without even the implied warranty of
%   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
%   GNU General Public License for more details.
%
%   You should have received a copy of the GNU General Public License
%   along with this program.  If not, see &lt;http://www.gnu.org/licenses/&gt;.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{thumby}[2010/01/14 v0.1 Thumby]

\typeout{}
\typeout{***********************************************}
\typeout{*********** Loading Thumby Package ************}
\typeout{***********************************************}
\typeout{}

% We use the tikz library to draw and position the thumb indexes.
\RequirePackage{tikz}

% We use the perltex package to run perl within LaTeX.
% This is used to do the calculations of the dimensions
% of the thumb boxes and their locations, which are fed
% to tikz.
\RequirePackage{perltex}

%% We use the bophook package to place a thumb box on each page.
\RequirePackage{bophook}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Configuration commands.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\perlnewcommand{\thumbyNumberFormat}[1]{
    $thumby_number_format = $_[0] ;
    # Slashes have to be doubled, as otherwise perl will interpret them as indicating
    # that a special character follows.
    $thumby_number_format =~ s{/}{//} ;
    return "\\typeout{Thumby number format: $thumby_number_format}" ;
}

% Place a thumb index on each page.
\perlnewcommand{\thumbySides}[1]{
    $thumby_sides = $_[0] ;

    if ( $thumby_sides eq "one" ) {
        $output = &lt;&lt;END;
        % Using command from the bophook package to place a thumb index on each page.
        \\AtBeginPage{%
            \\thumbyprintthumbright{\\thumbychapnum}
        }
END
    } elsif ( $thumby_sides eq "two" ) {
        $output = &lt;&lt;END;
        % Using command from the bophook package to place a thumb index on each page.
        \\AtBeginPage{%
            % Odd pages should have the thumb index on the right,
            % while even ones on the left.
            \\checkoddpage
            \\ifoddpage
               \\thumbyprintthumbright{\\thumbychapnum}
            \\else
               \\thumbyprintthumbleft{\\thumbychapnum}
            \\fi
        }
END
    } else {
        $output = &lt;&lt;END;
        \\PackageError{thumby}{\\protect\\thumbySides \\space must be "one" or "two"}{}
END
    }
    return $output ;
}

\perlnewcommand{\thumbyBackground}[1]{
    $thumby_background = $_[0] ;
    return "" ;
}

\perlnewcommand{\thumbyForeground}[1]{
    $thumby_foreground = $_[0] ;
    return "" ;
}

\perlnewcommand{\thumbyPageHeight}[1]{
    $thumby_page_height = $_[0] ;

    # Sanity checks
    if ( $thumby_page_height =~ m{^\d+$} ) {
        # An integer.
        # Looks good.  Doing nothing.
        $output = "" ;
    } elsif ( $thumby_page_height =~ m{^\d*\.\d+$} ) {
        # A floating point number.
        # Looks good.  Doing nothing.
        $output = "" ;
    } else {
        $output = "\\PackageError{thumby}{\\protect\\thumbyPageHeight \\space must a number.}{}" ;
    }

    return $output ;
}

\perlnewcommand{\thumbyThumbWidth}[1]{
    $thumby_thumb_width = $_[0] ;

    # Sanity checks
    if ( $thumby_thumb_width =~ m{^\d+$} ) {
        # An integer.
        # Looks good.  Doing nothing.
        $output = "" ;
    } elsif ( $thumby_thumb_width =~ m{^\d*\.\d+$} ) {
        # A floating point number.
        # Looks good.  Doing nothing.
        $output = "" ;
    } else {
        $output = "\\PackageError{thumby}{\\protect\\thumbyThumbWidth \\space must a number.}{}" ;
    }

    return $output ;
}

\perlnewcommand{\thumbySetup}{
    $thumby_thumb_height = $thumby_page_height / $thumby_total_chapters ;
    $half_thumb_width = $thumby_thumb_width / 2 ;
    $output = &lt;&lt;END;
\\typeout{}
\\typeout{** Thumby setup **}
\\typeout{Sides: $thumby_sides}
\\typeout{Total chapters: $thumby_total_chapters}
\\typeout{Page height: $thumby_page_height points}
\\typeout{Thumb height: $thumby_thumb_height points}
\\typeout{Thumb width: $thumby_thumb_width points}
\\typeout{Foreground: $thumby_foreground}
\\typeout{Background: $thumby_background}
\\typeout{Chapter number format: $thumby_number_format}
\\typeout{}
END
    return $output ;
}

\perlnewcommand{\thumbyTotalChapters}[1]{
    $thumby_total_chapters = $_[0] ;
    my $output = "" ;
    if ( $thumby_total_chapters =~ m{^\d+$} ) {
        if ( $thumby_total_chapters &lt; 1 ) {
            $output = &lt;&lt;END;
            \\PackageError{thumby}{\\protect\\thumbyTotalChapters \\space must be greater than 0.}{}
END
        } else {
            # Looks good.  Doing nothing.
            $output = "" ;
        }
    } else {
        $output = &lt;&lt;END;
        \\PackageError{thumby}{\\protect\\thumbyTotalChapters \\space must be an integer}{}
END
    }

    return $output ;
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Miscellaneous commands
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% Definition of \thumbychapnum, which returns the current chapter number,
% but only for chapters, not for parts.
\newcommand{\thumbychapnum}{}

\renewcommand{\mempartinfo}[4]{%
\renewcommand{\thumbychapnum}{}
}

\renewcommand{\memchapinfo}[4]{%
\renewcommand{\thumbychapnum}{\thechapter}
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Thumb index printing commands.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% This command will print a thumb box on the left or right of the page,
% depending on the value of the second argument given to it.
%
% Some sanity checks are also run on the chapter number, to make sure it's valid.
% NOTE, chapter numbers less than 1 are not printed.
\perlnewcommand{\thumbyprintthumb}[2]{
    $thumby_chapter_number = shift ;
    $left_or_right = shift ;

    # Run some sanity checks on $thumby_chapter_number
    if ( $thumby_chapter_number eq "" ) {
        # Doing nothing
        return ""
    } elsif ( not ( $thumby_chapter_number =~ m{^\d+$} ) ) {
        # $thumby_chapter_number is not a number
        return 'ERROR: chapternumber "' . $thumby_chapter_number . '" is not a number' ;
    } elsif ( $thumby_chapter_number &lt; 1 ) {
        # Doing nothing
        return "" ;
    }

    # Determine the position of the thumb index
    if ( $left_or_right eq "left" ) {
        $horizontal_thumb_position = $half_thumb_width ;
        $origin = "north west" ;
    } elsif ( $left_or_right eq "right" ) {
        $horizontal_thumb_position = -$half_thumb_width ;
        $origin = "north east" ;
    }

    $vertical_thumb_position = ( $thumby_chapter_number * $thumby_thumb_height ) - $thumby_thumb_height ;

    $thumby_formatted_chapter_number = $thumby_number_format ;
    $thumby_formatted_chapter_number =~ s{\$chapter_number}{$thumby_chapter_number} ;

# Tikz code to draw the chapter number surrounded by a box:
$output = &lt;&lt;END;
\\pgfrememberpicturepositiononpagetrue
\\begin{pgfpicture}
\\pgfusepath{use as bounding box}
\\pgftransformshift{\\pgfpointanchor{current page}{$origin}}
\\pgftransformshift{\\pgfpoint{$horizontal_thumb_position}{-$vertical_thumb_position}}
\\pgfset{minimum width=$thumby_thumb_width}
\\pgfset{minimum height=$thumby_thumb_height}
\\pgfsetfillcolor{$thumby_background}
\\pgfnode{rectangle}{north}{}{thumb}{\\pgfusepath{fill}}
\\pgfsetfillcolor{$thumby_foreground}
\\pgfnode{rectangle}{north}{$thumby_formatted_chapter_number}{thumb}{\\pgfusepath{stroke}}
\\end{pgfpicture}
END
    return $output ;
}

\perlnewcommand{\thumbyprintthumbleft}[1]{
    $thumby_chapter_number = $_[0] ;
    return latex_thumbyprintthumb( $thumby_chapter_number, "left" ) ;
}

\perlnewcommand{\thumbyprintthumbright}[1]{
    $thumby_chapter_number = $_[0] ;
    return latex_thumbyprintthumb( $thumby_chapter_number, "right" ) ;
}

\endinput
</pre></body></html>