a tikzpicture on pages without chapter and index

Question

I would get the result of the output below

\documentclass[11pt, a4paper]{book}
\usepackage{geometry}
\geometry{%
papersize={19.7cm,27cm},
centering,
textwidth=380pt,
textheight=650pt}

\usepackage{fancyhdr}
\renewcommand{\sectionmark}[1]{\markright{\thesection\ #1}}
\renewcommand{\chaptermark}[1]{\markboth{#1}{}}

\usepackage{tikz}
\parindent=0pt
\pagestyle{empty}

\begin{document}
\chapter{Title of chapter}
\section{and section}
Bla bla bla. In this page the pagestyle would be empty.
\newpage
\begin{tikzpicture}[remember picture,overlay]
    \fill[lightgray] (-90pt,1cm) rectangle (0pt,2.5cm); %riquadro ad inizio pagina
    \draw[gray] (-90pt,1cm)--(470pt,1cm);   %linea sotto riquadro ad inizio pagina
    \fill[lightgray] ({\textwidth/2-30pt},-23.45cm) rectangle ({\textwidth/2+30pt},-24.45cm);   %riquadro per la pagina
    \draw[gray] (-90pt,-23.45cm)--(470pt,-23.45cm); %linea di fondo pagina
    \node at (0,1.25cm) [left]{\sffamily\chaptername\ \thechapter};
    \node at (0,1.25cm) [right]{\slshape\sffamily\leftmark};
    \node at (380pt,1.25cm) [left] {\slshape\sffamily author};
    \node at ({\textwidth/2},-23.9cm) {\bfseries\sffamily\thepage};
\end{tikzpicture}

Here there is some text (here the number of the page is even);

\newpage

\begin{tikzpicture}[remember picture,overlay]
    \fill[lightgray] (380pt,1cm) rectangle (470pt,2.5cm);   %riquadro (destro) ad inizio pagina
    \draw[gray] (-90pt,1cm)--(470pt,1cm);   %linea sotto riquadro ad inizio pagina
    \fill[lightgray] ({\textwidth/2-30pt},-23.45cm) rectangle ({\textwidth/2+30pt},-24.45cm);   %riquadro per la pagina
    \draw[gray] (-90pt,-23.45cm)--(470pt,-23.45cm); %linea di fondo-pagina
    \node at (380pt,1.25cm) [right]{\sffamily\chaptername\ \thechapter};
    \node at (380pt,1.25cm) [left]{\slshape\sffamily\leftmark};
    \node at (0pt,1.25cm) [right]{\slshape\sffamily\rightmark};
    \node at ({\textwidth/2},-23.95cm) {\bfseries\sffamily\thepage};
\end{tikzpicture}

And here there is some text too (here the number of the page is odd).
\end{document}

but on every page of the document. I already notice that there is a discussion about my question, but there I cannot obtain sufficient information on the use of everypage package, or something that put me on the right track to solve this problem.

Answer 1

Here's one possibility, using the fancyhdr package to define a page style with the specifications required:

\documentclass[11pt, a4paper]{book}
\usepackage{geometry}
\geometry{%
papersize={19.7cm,27cm},
centering,
textwidth=380pt,
textheight=650pt}
\usepackage{fancyhdr}
\usepackage{tikz}
\usepackage{lipsum}% just to generate text automatically

\newlength\mylen
\setlength\mylen{\dimexpr1in+\hoffset+18pt\relax}

\setlength\headheight{13.6pt}
\fancyhfoffset[L,R]{\dimexpr1in+\hoffset+18pt\relax}
\fancyhf{}

\fancyhead[LE]{%
\begin{tikzpicture}[overlay]
\fill[lightgray] (0,-4pt) rectangle (\mylen,\headheight+1in);
\node[anchor=east,font=\sffamily] at (\mylen,0) {\strut\chaptername~\thechapter};
\node[anchor=west,font=\slshape\sffamily] at (\mylen,0) {\strut\leftmark};
\end{tikzpicture}%
}

\fancyhead[RE]{%
\begin{tikzpicture}[overlay]
\fill[lightgray] (0,-4pt) rectangle (\mylen,\headheight+1in);
\node[anchor=east,font=\slshape\sffamily] at (-90pt,0) {\strut Author};
\end{tikzpicture}%
}

\fancyhead[RO]{%
\begin{tikzpicture}[overlay]
\fill[lightgray] (-\mylen,-4pt) rectangle (0,\headheight+1in);
\node[anchor=east,font=\slshape\sffamily] at (-\mylen,0) {\strut\leftmark};
\node[anchor=west,font=\sffamily] at (-\mylen,0) {\strut\chaptername~\thechapter};
\end{tikzpicture}%
}

\fancyhead[LO]{%
\begin{tikzpicture}[overlay]
\node[anchor=west,font=\slshape\sffamily] at (\mylen,0) {\rightmark};
\end{tikzpicture}%
}

\fancyfoot[C]{%
\begin{tikzpicture}[overlay]
\fill[lightgray] (-30pt,0) rectangle (30pt,-30pt);
\node[anchor=center,font=\bfseries\sffamily] at (0,-15pt) {\thepage};
\draw (-\textwidth,0) -- (\textwidth,0);
\end{tikzpicture}%
}

\parindent=0pt
\pagestyle{fancy}
\renewcommand\chaptermark[1]{\markboth{#1}{}}
\renewcommand\sectionmark[1]{\markright{\thesection\ #1}}

\begin{document}

\chapter{Title of chapter}
\section{Title of a Section}
\lipsum[1-30]

\end{document}

Some zoomed images: first, the header for an even page:

the header for an even page:

finally, a footer:

The use of the background package in this particular situation might not be the best approach since there are many pages (e.g., first page of each chapter, empty pages produced by internal \cleardoublepage commands) which shouldn't receive the style and doing this with background might require more effort than the present approach.