Table of contents: section titles ragged right

Question

In the standard book class, if there are very long section titles, \tableofcontents tries to produce justified text.

How can I produce a table of contents so that the section titles are typeset flush left, ragged right?

That is, I would like to produce something like this (note that the page numbers should be aligned):

1.2.2  Short title  . . . . . 42
1.2.3  Long section title
       can be wrapped . . . . 44
1.2.4  Another short title  . 45

(The default output is almost identical, except that Latex uses hyphenation and variable inter-word spacing to make sure that the right margins are aligned for all multi-line section titles.)

I assumed that I could easily use the titletoc package—just re-define the toc entries and add \raggedright somewhere. However, none of my attempts were successful.

Answer 1

You can try with

\usepackage{etoolbox}
\makeatletter
\patchcmd{\@dottedtocline}
  {\rightskip\@tocrmarg}
  {\rightskip\@tocrmarg plus 4em \hyphenpenalty\@M}
  {}{}
\makeatother

In this way you'll get ragged right text and no hyphenation.

Answer 2

You may use the package tocstyle (Alpha version) which is included in KOMA-Script.

\documentclass{article}

\usepackage{tocstyle}
\usetocstyle{standard}
\settocfeature{raggedhook}{\raggedright}

\newcommand*{\sometext}{%
  Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Ut purus elit,
  vestibulum ut, placerat ac, adipiscing vitae, felis. Curabitur dictum gravida
  mauris. Nam arcu libero, nonummy eget, consectetuer id, vulputate a, magna.
  Donec vehicula augue eu neque.%
}

\begin{document}

\tableofcontents

\section{\sometext}

\subsection{\sometext}

\end{document}