jsonlistings
Could someone please explain me how I can color the json attributes for a json string in listing? An example would be great. Thanks.
Example String: {"name1":"attribute1","name2":"attribute2"}. How can I make the string "name1" and "name2" appear blue?
I tried the solution at
How can I highlight JSON string values but not attributes? but this highlights the values and not the attributes.
Here's one possibility for the colon, comma, braces, square brackets, and numbers, using the literate key:
\documentclass{article}
\usepackage{bera}% optional: just to have a nice mono-spaced font
\usepackage{listings}
\usepackage{xcolor}
\colorlet{punct}{red!60!black}
\definecolor{background}{HTML}{EEEEEE}
\definecolor{delim}{RGB}{20,105,176}
\colorlet{numb}{magenta!60!black}
\lstdefinelanguage{json}{
basicstyle=\normalfont\ttfamily,
numbers=left,
numberstyle=\scriptsize,
stepnumber=1,
numbersep=8pt,
showstringspaces=false,
breaklines=true,
frame=lines,
backgroundcolor=\color{background},
literate=
*{0}{{{\color{numb}0}}}{1}
{1}{{{\color{numb}1}}}{1}
{2}{{{\color{numb}2}}}{1}
{3}{{{\color{numb}3}}}{1}
{4}{{{\color{numb}4}}}{1}
{5}{{{\color{numb}5}}}{1}
{6}{{{\color{numb}6}}}{1}
{7}{{{\color{numb}7}}}{1}
{8}{{{\color{numb}8}}}{1}
{9}{{{\color{numb}9}}}{1}
{:}{{{\color{punct}{:}}}}{1}
{,}{{{\color{punct}{,}}}}{1}
{\{}{{{\color{delim}{\{}}}}{1}
{\}}{{{\color{delim}{\}}}}}{1}
{[}{{{\color{delim}{[}}}}{1}
{]}{{{\color{delim}{]}}}}{1},
}
\begin{document}
\begin{lstlisting}[language=json,firstnumber=1]
{"menu": {
"id": "file",
"value": "File",
"popup": {
"menuitem": [
{"value": "New", "onclick": "CreateNewDoc()"},
{"value": "Open", "onclick": "OpenDoc()"},
{"value": "Close", "onclick": "CloseDoc()"}
]
}
}}
0123456789
\end{lstlisting}
\end{document}
The listings package has an internal macro called \lst@InstallKeywords for exactly that purpose: defining a custom class of keywords. In your case, invoking
\lst@InstallKeywords k{attributes}{attributestyle}\slshape{attributestyle}{}ld
creates four keys: attributes, moreattributes, deleteattributes, and attributestyle (which is set to \slshape by default). All four keys have almost the same usage as their keywords equivalents; the only difference is that they do not accept any optional argument, which means that they only allow for one class of "attribute" keywords.
However, if needed, you can define a whole family of "attribute" keywords (within which you can have several "attribute" keyword classes) with another internal macro called \lst@InstallFamily; the latter has exactly the same syntax as \lst@InstallKeywords. See the manual for more details.
\documentclass[12pt]{article}
\usepackage{graphicx}
\usepackage{pdflscape}
\usepackage{color}
\usepackage[dvipsnames]{xcolor}
\usepackage{listings}
\usepackage[T1]{fontenc}
\usepackage[scaled]{beramono}
\usepackage[driver=pdftex, margin=2.54cm]{geometry}
\makeatletter
\lst@InstallKeywords k{attributes}{attributestyle}\slshape{attributestyle}{}ld
\makeatother
\definecolor{bluekeywords}{rgb}{0,0,1}
\definecolor{greencomments}{rgb}{0,0.5,0}
\definecolor{redstrings}{rgb}{0.64,0.08,0.08}
\definecolor{xmlcomments}{rgb}{0.5,0.5,0.5}
\definecolor{types}{rgb}{0.17,0.57,0.68}
\lstset{language=[Sharp]C,
showspaces=false,
showtabs=false,
breaklines=true,
showstringspaces=false,
breakatwhitespace=true,
escapeinside={(*@}{@*)},
commentstyle=\color{greencomments},
keywordstyle=\color{bluekeywords}\bfseries,
stringstyle=\color{redstrings},
basicstyle=\ttfamily,
morekeywords={ abstract, event, new, struct,
as, explicit, null, switch,
base, extern, object, this,
bool, false, operator, throw,
break, finally, out, true,
byte, fixed, override, try,
case, float, params, typeof,
catch, for, private, uint,
char, foreach, protected, ulong,
checked, goto, public, unchecked,
class, if, readonly, unsafe,
const, implicit, ref, ushort,
continue, in, return, using,
decimal, int, sbyte, virtual,
default, interface, sealed, volatile,
delegate, internal, short, void,
do, is, sizeof, while,
double, lock, stackalloc,
else, long, static,
enum, namespace, string, GeneticAlgorithmHarmonizer, var},
moreattributes={Assert, Test}, % etc...
attributestyle = \bfseries\color{RubineRed}, % (for instance)
%deleteattributes={Assert}, % just a test
}
\begin{document}
\begin{lstlisting}[breaklines=true]
using System;
using Harmonizer;
using NUnit.Framework;
using ScoreManagement;
namespace TestingLibrary
{
[TestFixture]
public class ScoreManagementUnitTests
{
private const KeySignature KeySignature = ScoreManagement.KeySignature.CMajor;
private const TimeSignature TimeSignature = ScoreManagement.TimeSignature.FourFour;
[Test]
public void AddConstructorParameters_AddingKeySignature_ReturnsTrue()
{
var score = new Score(KeySignature);
Assert.IsTrue(score.KeySignature == KeySignature);
}
}
}
\end{lstlisting}
\end{document}
Best Answer
There is a trick way: Highlight all strings except those following a colon.
PS: Internally, the following aspects
strings,comments,escape,style,language,keywords,labels,lineshape,frames,emph,indexare treat equally. In case you needstring/commentfor the actual string/comment, you can add an aspect's dealing with attributes and values by yourself.