color
I would like to define a new command to work as an alert command. If I want to alert some part of my text I would simply write \alert{}. But I want the result in red color.
What is the best way to do this? I tried
\def\alert#1{{\color{red}{#1}}}
but I know that there is \textcolor also. I want my command to work both for text and math contents.
What is the difference between them?
In relation to my comment. You can use the option literate only for the brackets.
\documentclass[10pt]{article}
\usepackage{bera}
\usepackage{xcolor}
\usepackage{listings}
\lstset{basicstyle=\footnotesize\ttfamily,columns=flexible,frame=single,framerule=0pt,%
backgroundcolor=\color{gray!20},%
xleftmargin=\fboxsep,%
xrightmargin=\fboxsep,
language=[LaTeX]TeX,%
keywordstyle=\color{blue},%
texcsstyle=*\color{red}\bfseries,%
texcs={end,begin,documentclass,graphicspath},%
mathescape=false,escapechar=|,%
literate={<B>}{\textcolor{blue}{\string\usepackage}}1
{\{ }{\textcolor{red}{\{}}1
{\}}{\textcolor{red}{\}}}1
{[}{\textcolor{green}{[}}1
{]}{\textcolor{green}{]}}1
}
\pagestyle{empty}
\begin{document}
\begin{lstlisting}
\documentclass[12pt]{article}
<B>{xcolor}
<B>{listings}
<B>[options]{graphicx}
\graphicspath{{img/pdf}}
\begin{document}
Text
\end{document}
\end{lstlisting}
\end{document}
The escaped part is a group, so color command issued there are lost at the end. There is no official way to set a color globally but you can look here How can I change the text color in such a way that the effect transcends groups?.
Beside this you can try to set the color with \aftergroup (but color of keywords will overwrite this settings):
\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{xcolor}
\usepackage{listings}
\begin{document}
\def\redcolor{\color{red}}
\def\blackcolor{\color{black}}
\begin{lstlisting}[escapechar=@]
#@\aftergroup\redcolor@include@\aftergroup\blackcolor@ <fstream.h>
void main () {
fail
pass
}
\end{lstlisting}
\end{document}
Best Answer
Despite the name
\textcoloralso works in math mode. The main difference is just one of syntax,\textcolortakes text as an argument (like\textrm)\coloraffects all text to the end of the group (like\rmfamily). However\textcoloralso executes\leavevmodewhich makes the color special occur in a much less destructive place as part of the paragraph rather than on a vertical list. So\textcoloris usually a better choice unless you are setting a colour for a large amount of text, such as the whole document.