bookstyle.sty

% !TEX root = main.tex
% -------------------------------------------------------------------
% Bookstyle for কম্বিনেটরিকসে হাতেখড়ি (Intro to Combinatorics)
% E-mail: adib.hasan8@gmail.com
% Released under the GNU Public License 3 or later
% ----------------------------------------------------------------
% This is the template for the first Bengali book written with
% LaTeXbangla, a package I have written some years ago. I hope
% this style file will simplify a number of steps in producing high 
% quality Bengali books in LaTeX. 
% ------------------------------------------------------------------
% Copyright (C) 2019 by Adib Hasan adib.hasan8@gmail.com

% This work may be distributed and/or modified under the
% conditions of the GPL v.3. If you do write a book with it, 
% please consider giving me credit and providing a link to this 
% repo in the acknowledgement section of your book, so that 
% future authors may also benefit from this template.
% --------------------------------------------------------------


% space between line as percentage
\linespread{1.15}
% space between paragraphs.
\setlength{\parskip}{4pt}
% paragraph indent
\setlength{\parindent}{0pt}
% discourage breaking of footnote text accorss multiple pages.
\interfootnotelinepenalty=1000
% to take care of nonbreakingspace issue in EU1 format of the .bbl
\DeclareTextCommandDefault{\nobreakspace}{\leavevmode\nobreak\ }


% REQUIRED PACKAGES
%%%%%%%%%%%%%%%%%%%%%
% latexbangla with all features
\RequirePackage[banglamainfont=SolaimanLipi,
                banglattfont=Siyam Rupali,
               ]{latexbangla}

% \inlcudegraphics
\RequirePackage{graphicx}


% for citation. they will be sorted and appear in text like [21]. 
% see natbib manual for more available styles
\RequirePackage[sort, square, numbers]{natbib}



% hyperlinks
\RequirePackage[colorlinks=false, 
                bookmarksopen=true, 
                hidelinks, 
                unicode, 
                naturalnames
               ]{hyperref}

% URL font is latex default Latin Modern Teletype. If you don't like that
% change it to something else.
\renewcommand\UrlFont{\fontencoding{OT1}\fontfamily{lmtt}\selectfont}

% autoref name for example env. when you call "In \autoref{blah}",
% it will output "In udahoron blah"
\newcommand\exampleautorefname{উদাহরণ}

% translating autoref name for existing commands.
\appto{\blockextras@bengali}{%
  \renewcommand*{\equationautorefname}{সমীকরণ}%
}
\appto{\blockextras@bengali}{%
  \renewcommand*{\chapterautorefname}{অধ্যায়}%
}
\appto{\blockextras@bengali}{%
  \renewcommand*{\sectionautorefname}{সেকশন}%
}
\appto{\blockextras@bengali}{%
  \renewcommand{\figureautorefname}{চিত্র}%
}


% packages from American Mathematical Society
% they provide some very useful commands and fonts.
% search in the internet for details.
\RequirePackage{amsfonts, amssymb, amsmath, amsthm}

% equation number inside parenthesis in citation
\let\oldtheequation\theequation
\renewcommand\tagform@[1]{\maketag@@@{\ignorespaces#1\unskip\@@italiccorr}}
\renewcommand\theequation{(\oldtheequation)}
%to allow long align env. to break between pages
\allowdisplaybreaks


\RequirePackage{xpatch}
% replace the dot after 'proof' with colon
\xpatchcmd{\proof}{\@addpunct{.}}{\@addpunct{:}}{}{}
% make proof bold, upshape instead of italic
\xpatchcmd{\proof}{\itshape}{\bfseries}{}{}
% because polyglossia defines proofname as \itshape "proman"
\addto\captionsbengali{\renewcommand\proofname{\bfseries প্রমাণ}}


% title and section formatting
\RequirePackage{titlesec}
% section sign before section number
\titleformat{\section}[hang]{\raggedright\Large\bfseries}{{\uccoff\fontfamily{lmr}\selectfont\large§\,\uccon}\thesection}{0.5em}{}

% chapter title
\RequirePackage{xcolor}
\definecolor{mygray}{RGB}{60,60,60}
\titleformat{\chapter}[display]
  {\bfseries\color{mygray}}
  {\filleft%
    \begin{tikzpicture}
    \node[
      outer sep=0pt,
      text width=2.4cm,
      minimum height=2.5cm,
      fill=mygray,
      font=\color{white}\fontsize{75}{80}\selectfont,
      align=center
      ] (num) {\thechapter};
    \node[
      rotate=90,
      anchor=south,
      font=\color{black}\Large
      ] at ([xshift=-5pt]num.west) {\chaptertitlename};  
    \end{tikzpicture}%
  }
  {-30pt}
  {\fontsize{22}{24}\selectfont}
  % [\titlerule[2.5pt]\vskip3pt\titlerule\vskip4pt]
  [{\titlerule[2.5pt]\vskip3pt\titlerule\vskip-1em}]




% better double border intersection
\RequirePackage{hhline}

% enlarged first letter
\RequirePackage{lettrine}
\newcommand{\firstword}[2]{\lettrine[lraise=0.25, nindent=0pt, findent=2pt]{#1}{#2}}

% table of contents formatting
\RequirePackage{tocloft}
\def\cftchapteraftersnum{.}

% footnote in tables appear the end of page
\RequirePackage{footnote}
\makesavenoteenv{tabular}

% better float management
\RequirePackage{placeins}
% multiple columns
\RequirePackage{multicol}
% compilation time decreases significantly with this package
% although it produces a warning
\RequirePackage{subfig}
% breakable tables
\RequirePackage{longtable}



% NEW ENVIRONMENTS
%%%%%%%%%%%%%%%%%%%%%%%%%%
% new font for quotation
\newfontfamily\quotefont[%
    Scale= 1.1,
    WordSpace=1.4,
    AutoFakeSlant=1.2,
    AutoFakeBold=1.2
    ]{[Monotype Corsiva]}

% a chapquote environment for chapter quotes
\newenvironment{chapquote}[2][2em]
{\setlength{\@tempdima}{#1}%
    \def\chapquote@author{#2}%
    \parshape 1 \@tempdima \dimexpr\textwidth-2\@tempdima\relax%
    \uccoff\quotefont
}
{\par\hfill―\ \uccon\chapquote@author\hspace*{\@tempdima}\par\bigskip}

% a new solution environment
\newenvironment{solution}[1][সমাধান]{\proof[\bfseries #1]}{\endproof}

\newtheoremstyle{custom}% name
{3pt}% space above
{3pt}% space below
{\rm}% body font
{}% indent amount
{\bfseries}% theorem head font
{:}% punctuation after theorem head
{.5em}% space after theorem head
{\thmname{#1}\thmnumber{ \bfseries#2}\thmnote{ (#3)}}% theorem head spec

\theoremstyle{custom}
\newtheorem*{remark}{\bfseries মন্তব্য}


% for customizable boxes
\RequirePackage[many]{tcolorbox}

% nije koro box
\newtcolorbox{diybox}{%
    tikznode boxed title,
    freelance,
    breakable,
    enlargepage flexible=\baselineskip,
    arc=1mm,
    left=4pt, right=4pt, bottom=4pt,
    colframe=black,
    colback=white,
    boxrule=0.7pt,
    interior style={white},
    attach boxed title to top center= {yshift=-\tcboxedtitleheight/2},
    fonttitle=\bfseries,
    colbacktitle=white,coltitle=black,
    boxed title style={size=normal,colframe=white,boxrule=0pt},
    before skip=8pt plus 2pt minus 4pt,
    title={নিজে করো}}

% mone rakhbe box
% there is an optional parameter, when provided, replaces "mone rakhbe"
\newtcolorbox{theorem}[1][মনে রাখবে]{%
    freelance,
    breakable,
    enlargepage flexible=\baselineskip,
    arc=1mm,
    left=3pt, right=3pt, bottom=2pt, top=8pt,
    colframe=black,
    boxrule=0.7pt,
    colback=white,
    attach boxed title to top center= {yshift=-\tcboxedtitleheight/2},
    fonttitle=\bfseries,
    colbacktitle=white,coltitle=black,
    title={#1},
    before skip=8pt plus 2pt minus 4pt,
    boxed title style={size=fbox, colback=white, freelance,boxrule=0.7pt,colframe=black,frame code={ \path[tcb fill frame] ([xshift=-2mm]frame.west) -- (frame.north west) -- (frame.north east) -- ([xshift=2mm]frame.east)-- (frame.south east) -- (frame.south west) -- cycle; },
    interior code={ \path[tcb fill interior] ([xshift=-2mm]interior.west)-- (interior.north west) -- (interior.north east)-- ([xshift=2mm]interior.east) -- (interior.south east) -- (interior.south west)-- cycle;}}
    }

% udahoron box
% use \begin{example}[label=blah]...\end{example} to call \autoref{blah}.
\newcounter{example}[chapter]
\newtcolorbox[use counter=example, number freestyle={\noexpand\thechapter.\noexpand\tobangla{\tcbcounter}}]{example}[1][]{
    colback=white,
    colframe=black,%gray!80,
    fonttitle=\bfseries,
    colbacktitle=white,%gray!40,
    arc=1mm,
    top=8pt, left=3pt, right=3pt, bottom=2pt,
    coltitle=black,
    boxrule=0.7pt,
    freelance,
    breakable,
    enlargepage flexible=\baselineskip,
    before skip=8pt plus 2pt minus 2pt,
    after skip=4pt plus 2pt minus 0pt,
    attach boxed title to top left={yshift=-9pt,xshift=6pt},
    boxed title style={size=fbox,boxrule=0.7pt,colframe=black, arc=1mm},
    title={উদাহরণ \thetcbcounter},
    #1
}


% list with no indentation and special labels
\newcommand{\diamondlabel}{\raisebox{2.5pt}{\includegraphics[height=8pt, angle=135]{img/listbullet01}}}
\newcounter{noindlistcounter}
\newenvironment{noindlist}
{\begin{list}{\diamondlabel\;\;}{\labelsep=0em \labelwidth=2em \itemindent=0em \leftmargin=1.5em}}{\end{list}}


% a list of exercises. appear as "somossa #:"
\newcounter{exercisecounter}
\counterwithin{exercisecounter}{chapter}
\newenvironment{exercise}
{\begin{list}{\textbf{সমস্যা \thechapter.\tobangla{exercisecounter}:~}}{\usecounter{exercisecounter} \labelsep=0em \labelwidth=0em \leftmargin=0em \itemindent=0em}}{\end{list}}





% MISCELLANEOUS COMMANDS
%%%%%%%%%%%%%%%%%%%%%%%%%% 
\newcommand{\partof}{অংশবিশেষ}
\newcommand{\simplified}{সরলীকৃত}

% old factorial symbol |__
\RequirePackage{rotating}
\RequirePackage{tkz-berge}
\RequirePackage[misc]{ifsym}
\RequirePackage{tabu}
\usetikzlibrary{calc}
\newcommand{\oldfactorial}[1]{%
\tikz[baseline]{\node[anchor=base,inner sep=0.3ex](mynode){\ensuremath{#1}};\draw(mynode.north west)--(mynode.south west)--(mynode.south east);\path[use as bounding box]($(mynode.south west)+(-0.3ex,-0.3ex)$)rectangle($(mynode.north east)+(0.3ex,0.3ex)$);}
}

% permutation and combination
\newcommand*{\perm}[2]{{}^{#1}\!P_{#2}}
\newcommand*{\comb}[2]{{}^{#1}\!C_{#2}}


% counting continued commands
\DeclareRobustCommand{\stirl}{\genfrac\{\}{0pt}{}}
\DeclareRobustCommand{\dstirl}{\genfrac\{\}{0pt}{0}}

% space character
\newcommand\spacesymbol[1][.3em]{%
  \mbox{\kern.06em\vrule height.3ex}%
  \vbox{\hrule width#1}%
  \hbox{\vrule height.3ex}}

\endinput