\part seems doesn't use \cleardoublepage

Question

I redefined the \cleardoublepage to show "This page is intentionally left blank". However when using \part command, it produce an empty page not the same as defined in \cleardoublepage. Why is this happening?

Below is a MWE.

\documentclass[10pt]{book}
\usepackage{tikz}
\makeatletter
\renewcommand{\cleardoublepage}{\relax
  \clearpage
  \if@twoside \ifodd\c@page\relax\else
  \thispagestyle{empty}%
  \tikz[remember picture, overlay] \node at (current page.center)
    {\large This page is intentionally left blank};\newpage\fi\fi}
\makeatother
\usepackage{blindtext}
\begin{document}
\part{Some title}
\chapter{Name}
\blindtext
\chapter{Other Name}
\end{document}

score 2 · Accepted Answer · answered Feb 02 '21 at 07:28

Correct; \part doesn't issue a \cleardoublepage. Here is the definitions associated with \part taken from book.cls:

\newcommand\part{%
  \if@openright
    \cleardoublepage
  \else
    \clearpage
  \fi
  \thispagestyle{plain}%
  \if@twocolumn
    \onecolumn
    \@tempswatrue
  \else
    \@tempswafalse
  \fi
  \null\vfil
  \secdef\@part\@spart}
\def@part[#1]#2{%
    \ifnum \c@secnumdepth >-2\relax
      \refstepcounter{part}%
      \addcontentsline{toc}{part}{\thepart\hspace{1em}#1}%
    \else
      \addcontentsline{toc}{part}{#1}%
    \fi
    \markboth{}{}%
    {\centering
     \interlinepenalty @M
     \normalfont
     \ifnum \c@secnumdepth >-2\relax
       \huge\bfseries \partname\nobreakspace\thepart
       \par
       \vskip 20\p@
     \fi
     \Huge \bfseries #2\par}%
    @endpart}
\def@spart#1{%
    {\centering
     \interlinepenalty @M
     \normalfont
     \Huge \bfseries #1\par}%
    @endpart}
\def@endpart{\vfil\newpage
              \if@twoside
               \if@openright
                \null
                \thispagestyle{empty}%
                \newpage
               \fi
              \fi
              \if@tempswa
                \twocolumn
              \fi}

Note how \part uses either \@part or \@spart depending on whether you use \part or \part*, yet both end with \@endpart. And, there's not \cleardoublepage within \@endpart. With your elementary setup, it suffices to redefine \@endpart to

\def\@endpart{\vfil\cleardoublepage}

\part seems doesn't use \cleardoublepage

1 Answers1