参考这个帖子：处理部分（书类）titletoc
，我有一个新文件，这次是用 XeLaTeX 编译的（不再用 pdfLaTeX）。
如果我使用相同的代码titletoc，章节标题将不再正确对齐，我的意思是居中。这在第一部分的标题中非常明显，如下图所示：
代码：
\documentclass[a4paper,11pt]{book}
\usepackage{fontspec}
\usepackage{polyglossia}
\usepackage{titlesec,titletoc}
\usepackage{etoolbox}
\setmainfont{EB Garamond}
\setmainlanguage[babelshorthands=true]{italian}
\PolyglossiaSetup{italian}{indentfirst=false}
\frenchspacing
\makeatletter
\patchcmd\@part
{\thepart}
{\protect\numberline{\thepart}}
{}{\FAIL}
\makeatother
\makeatletter
\contentsmargin[-1.55em]{1.55em}
\titlecontents{part}
[0em]
{\addvspace{1.5pc}\filcenter}
{\large\partname~\thecontentslabel\endgraf\bfseries}
{\large}
{}
[\addvspace{.5pc}]
\titlecontents{chapter}
[4em]
{\vspace*{\baselineskip}\mdseries}
{\contentslabel[\hfill\thecontentslabel]{3em}\enspace}
{\hspace*{0.5em}}
{}
[]
\titlecontents{section}
[4em]
{\vspace*{.2\baselineskip}\mdseries\small}
{\contentslabel[\hfill\thecontentslabel]{3em}\enspace}
{}
{\hfill\llap{\makebox[\dimexpr\linewidth-1.3pc][l]{\makebox[1pc][r]{\thecontentspage}}}}
[]
\titlecontents*{subsection}
[4.525em]
{\footnotesize}
{}
{}
{, \thecontentspage}
[~--~]
[]
\makeatletter\@addtoreset{chapter}{part}\makeatother
\begin{document}
\tableofcontents
\part{Title}
\chapter{First Chapter}
\chapter{Second Chapter}
\part{Long Title of the Second Part}
\chapter{First Chapter}
\chapter{Second Chapter}
\part{Very Long Title of the Third Part}
\chapter{First Chapter}
\chapter{Second Chapter}
\end{document}
问题可能是什么原因造成的？谢谢！
答案1
书籍代码插入了一个 \hspace，您也应该将其删除。请注意，EB Garamond 没有粗体版本，因此 \bfseries 不起作用。
\documentclass[a4paper,11pt]{book}
\usepackage{fontspec}
\usepackage{polyglossia}
\usepackage{titlesec,titletoc}
\usepackage{etoolbox}
\setmainfont{EB Garamond}
\setmainlanguage[babelshorthands=true]{italian}
\PolyglossiaSetup{italian}{indentfirst=false}
\frenchspacing
\makeatletter
\patchcmd\@part
{\thepart\hspace{1em}} %<----------
{\protect\numberline{\thepart}}
{}{\FAIL}
\makeatother
\makeatletter
%\contentsmargin[-1.55em]{1.55em}
\titlecontents{part}
[0em]
{\addvspace{1.5pc}\filcenter}
{\large\partname~\thecontentslabel\endgraf\bfseries}
{\large}
{}
[\addvspace{.5pc}]
\titlecontents{chapter}
[4em]
{\vspace*{\baselineskip}\mdseries}
{\contentslabel[\hfill\thecontentslabel]{3em}\enspace}
{\hspace*{0.5em}}
{}
[]
\titlecontents{section}
[4em]
{\vspace*{.2\baselineskip}\mdseries\small}
{\contentslabel[\hfill\thecontentslabel]{3em}\enspace}
{}
{\hfill\llap{\makebox[\dimexpr\linewidth-1.3pc][l]{\makebox[1pc][r]{\thecontentspage}}}}
[]
\titlecontents*{subsection}
[4.525em]
{\footnotesize}
{}
{}
{, \thecontentspage}
[~--~]
[]
\makeatletter\@addtoreset{chapter}{part}\makeatother
\begin{document}
\tableofcontents
\part{Title}
\chapter{First Chapter}
\chapter{Second Chapter}
\part{Long Title of the Second Part}
\chapter{First Chapter}
\chapter{Second Chapter}
\part{Very Long Title of the Third Part}
\chapter{First Chapter}
\chapter{Second Chapter}
\end{document}
答案2
由于标准类中处理非标准方式\part，您必须titlesec使用选项加载并使用 `\titleformat ènewparttoc重新定义布局。所以我建议使用以下代码：\part
\documentclass[a4paper,11pt]{book}
\usepackage[showframe]{geometry}
\usepackage{fontspec}
\usepackage{polyglossia}
\usepackage[newparttoc]{titlesec}
\usepackage{titletoc}
\usepackage{etoolbox}
\setmainfont{EB Garamond}
\setmainlanguage[babelshorthands=true]{italian}
\PolyglossiaSetup{italian}{indentfirst=false}
\frenchspacing
%\makeatletter
%\patchcmd\@part
% {\thepart}
% {\protect\numberline{\thepart}}
% {}{\FAIL}
%\makeatother
%
\titleformat{\part}[display]{\bfseries\filcenter}{\partname~\thepart}{5ex}{\Huge}
\makeatletter
\contentsmargin[-1.55em]{1.55em}
\titlecontents{part}
[0em]
{\addvspace{1.5pc}\filcenter\large}
{\makebox[\linewidth]{\partname~\thecontentslabel}\endgraf\bfseries\makebox[\linewidth]}
{\large}
{}
[\addvspace{.5pc}]
\titlecontents{chapter}
[4em]
{\vspace*{\baselineskip}\mdseries}
{\contentslabel[\hfill\thecontentslabel]{3em}\enspace}
{\hspace*{0.5em}}
{}
[]
\titlecontents{section}
[4em]
{\vspace*{.2\baselineskip}\mdseries\small}
{\contentslabel[\hfill\thecontentslabel]{3em}\enspace}
{}
{\hfill\llap{\makebox[\dimexpr\linewidth-1.3pc][l]{\makebox[1pc][r]{\thecontentspage}}}}
[]
\titlecontents*{subsection}
[4.525em]
{\footnotesize}
{}
{}
{, \thecontentspage}
[~--~]
[]
\makeatletter\@addtoreset{chapter}{part}\makeatother
\begin{document}
\tableofcontents
\part{Title}
\chapter{First Chapter}
\chapter{Second Chapter}
\part{Long Title of the Second Part}
\chapter{First Chapter}
\chapter{Second Chapter}
\part{Very Long Title of the Third Part}
\chapter{First Chapter}
\chapter{Second Chapter}
\end{document}
