长章节标题中的第二行缩进

Question

我正在使用书籍类编写文档。我有一个很长的章节标题，只能容纳两行。我使用自定义章节标题字体，第二行章节标题的对齐方式被黑框隐藏。

\documentclass[12pt, twoside]{book}

\usepackage{lipsum}

\usepackage{titlesec,calc,xcolor}
\usepackage{lmodern}


\titleformat{\chapter}[display]{\fontsize{18}{16}\usefont{OT1}{phv}{m}{n}\bfseries}{}{0pt}{
    \raisebox{-5mm}[0pt][0pt]{%<<
        \begin{minipage}{20mm}
            \centering{\mdseries\footnotesize\normalsize\textsc{Chapter}}\\[5pt]%
            \rule{10mm}{30mm}\hspace{-10mm}%
            \raisebox{23mm}{\parbox{10mm}{\centering\LARGE\textcolor{white}{\thechapter}}}%
        \end{minipage}
    }%
    \rule{\textwidth-20mm}{.4pt}\\%
    \hspace*{20mm}  
}[\vspace*{10mm}]


\begin{document}

\chapter{This is an example of a very long title that only fits in two lines}

    \section{Section 1}
    \lipsum[1]

\end{document}

请问我该如何做？

Answer 1

您可以将章节标题放在 中minipage。

\documentclass[12pt, twoside]{book}
\usepackage{lipsum}
\usepackage{titlesec,calc,xcolor}
\usepackage{lmodern}

\titleformat{\chapter}[display]{\fontsize{18}{16}\usefont{OT1}{phv}{m}{n}\bfseries}{}{0pt}{
    \raisebox{-5mm}[0pt][0pt]{%<<
        \begin{minipage}{20mm}
            \centering{\mdseries\footnotesize\normalsize\textsc{Chapter}}\\[5pt]%
            \rule{10mm}{30mm}\hspace{-10mm}%
            \raisebox{23mm}{\parbox{10mm}{\centering\LARGE\textcolor{white}{\thechapter}}}%
        \end{minipage}
    }%
    \rule{\textwidth-22mm}{.4pt}\\%
    \hspace*{22mm}\begin{minipage}{\textwidth-22mm}
}[\end{minipage}\vspace*{10mm}]

\begin{document}

\chapter{This is an example of a very long title that only fits in two lines}
    \section{Section 1}
    \lipsum[1]

\end{document}

Answer 2

这里有一个变体：我将章节样式改为block，将章节标题放在\parbox宽度为的中\linegoal，它测量从当前点到右边距的长度，并使用\titlerule，它只是填充从当前点到右边距的线。

\documentclass[12pt, twoside]{book}
\usepackage{lmodern}
\usepackage{lipsum}
\usepackage{calc,xcolor}
\usepackage{linegoal}
\usepackage{titlesec}%

\titleformat{\chapter}[block]{\fontsize{18}{16}\usefont{OT1}{phv}{m}{n}\bfseries}{}{0pt}{
    \raisebox{-5mm}[0pt][0pt]{%<<
        \begin{minipage}{20mm}
            \centering{\mdseries\footnotesize\normalsize\textsc{Chapter}}\\[5pt]%
            \medskip\rule{10mm}{30mm}\hspace{-10mm}%
            \raisebox{23mm}{\parbox{10mm}{\centering\LARGE\textcolor{white}{\thechapter}}}%
        \end{minipage}
}%
 \titlerule\\%
    \hspace*{\dimexpr20mm +0.5em}
\parbox{\linegoal} }[\vspace*{10mm}]

\begin{document}

\chapter{This is an example of a very long title that only fits in two lines}

    \section{Section 1}
    \lipsum[1]

\end{document}