Put some text before \chapter{} in ToC

Question

I mean like having the table of content like:

Chapter X. Introduction

Chapter X. Abstract

Chapter X. Greetings

Where "X" is the automatic number put by LaTex.

All I've achieved is the following output, but I added "Capítulo 1." manually

Here's all packages I'm importing to my project, and my \documentclass

\documentclass[12pt, letterpaper, twoside]{book}
\usepackage[utf8]{inputenc}
\usepackage[spanish]{babel}
\usepackage[top=25mm, bottom=25mm,right=25mm,left=30mm]{geometry}
\usepackage{ragged2e}
\usepackage{graphicx}
\usepackage[table]{xcolor}
\usepackage{import}
\usepackage{enumerate}
\usepackage{tabularx,ragged2e,booktabs,caption}
\usepackage{multirow}
\graphicspath{{images/}}
\usepackage[babel]{csquotes}
\usepackage[backend=biber,style=apa]{biblatex}
\DeclareLanguageMapping{spanish}{spanish-apa}
\addbibresource{Bibliography.bib}

I'm importing .tex files by \import{pathtofile}{filename} as following

\import{part_1_introduction/}{introduction.tex}
\import{part_1_introduction/}{issue_statement.tex}
\import{part_1_introduction/}{justification.tex}
\import{part_1_introduction/}{general_objective.tex}

Where each file contains following commands at the very beginning of it

\part{Parte II. Estado del arte}

or

\chapter{Marco conceptual}

Welcome to TeX.SX! This should be quite easy to do, but it's very specific to the document class you are using and the packages you load. Can you please elaborate a minimal working example (MWE) of your document that contains the \documentclass command and all the \usepackages you do? — Phelype Oleinik, Sep 13 '18 at 20:08
Do you want 1. Capítulo 1. Introducción (which is a bit redundant, in my opinion) or Capítulo 1. Introducción (without the first 1.). Or something else? — Phelype Oleinik, Sep 13 '18 at 20:34
I want the second one Capítulo 1. Introducción, because the first one is redundant — Bryan Arreola, Sep 14 '18 at 00:43
Similar: Add word 'Chapter' before chapter number in ToC (memoir class) — Werner, Sep 14 '18 at 00:58

Phelype Oleinik · Accepted Answer · 2018-09-14T01:15:07.790

You can patch the \chapter macro to write Capítulo~ before the chapter number. Just add this to your preamble:

\usepackage{etoolbox}
\makeatletter
\patchcmd\@chapter
             {\numberline {\thechapter }}
  {\@chapapp~ \numberline {\thechapter }}
  {}{\FAIL}
\makeatother

The code above uses the \patchcmd command from etoolbox. \patchcmd takes four arguments:

\patchcmd{<command>}{<find>}{<replace>}{<success>}{<fail>}

it searches for the first occurrence of <find> the definition of <command> and, if found, replaces by <replace> and executes the <success> code. Otherwise executes the <fail> code.

I applied the patch above to the \@chapter macro which, in the book class, contains

\addcontentsline{toc}{chapter}{\protect\numberline{\thechapter}#1}%

which writes a line in the .toc file adding the current chapter to the table of contents.

The patch searches for \numberline{\thechapter} (which whites the chapter number) and inserts \@chapapp~ before it. \@chapapp is the word Capítulo when you are writing in spanish, but is something else in other language, and ~ is a space.

The <success> code is empty because we don't want \patchcmd to execute anything else. The fail code, on the other hand, contains \FAIL (which isn't defined) so that if, for any reason, the patch fails, \patchcmd warns you, instead of silently ignoring the failed patch.

Compilable example:

\documentclass[12pt, letterpaper, twoside]{book}
\usepackage[utf8]{inputenc}
\usepackage[spanish]{babel}
\usepackage[top=25mm, bottom=25mm,right=25mm,left=30mm]{geometry}
\usepackage{ragged2e}
\usepackage{graphicx}
\usepackage[table]{xcolor}
\usepackage{import}
\usepackage{enumerate}
\usepackage{tabularx,booktabs,caption}
\usepackage{multirow}
\graphicspath{{images/}}
\usepackage[babel]{csquotes}
\usepackage[backend=biber,style=apa]{biblatex}
\DeclareLanguageMapping{spanish}{spanish-apa}
% \addbibresource{Bibliography.bib}

\usepackage{etoolbox}
\makeatletter
\patchcmd\@chapter
  {\numberline {\thechapter }}
  {\@chapapp~ \numberline {\thechapter }}
  {}{\FAIL}
\makeatother

\usepackage{blindtext}% Dummy text for the example
\begin{document}
\tableofcontents
\blinddocument
\end{document}

It does exactly what I wanted. But I want to understand the code, can you explan it? — Bryan Arreola, Sep 14 '18 at 01:04
@BryanArreola I added an explanation. I hope it's clear enough. If it isn't, please let me know. — Phelype Oleinik, Sep 14 '18 at 01:15

score 1 · Answer 2 · answered Sep 14 '18 at 06:10

Here is another suggestion using package tocbasic:

\documentclass{book}
\usepackage{blindtext}% only for dummy text

\usepackage{tocbasic}
\DeclareTOCStyleEntry[
  entrynumberformat=\entryprefix{\chaptername},% adds the prefix
  dynnumwidth% calculates the needed numberwidth
]{tocline}{chapter}

\newcommand*\entryprefix[2]{#1~#2~}
\begin{document}
\tableofcontents
\blinddocument
\blinddocument
\chapter{Chapter title with many words, so it is longer than one line and needs a second line}
\end{document}

Run three times to get

Note that the second line of an entry is aligned with the text of the first line.

score 0 · Answer 3 · answered Sep 14 '18 at 18:18

0

Using the tocloft package:

\usepackage{tocloft}
\renewcommand{\cftchappresnum}{Capitulo }

will put Capitulo and a space before the chapter number in the ToC.

answered Sep 14 '18 at 18:18

Peter Wilson

28,066

Put some text before \chapter{} in ToC

3 Answers3

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