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Pretty LaTeX BlockCode rendering #699

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Pretty LaTeX BlockCode rendering #699

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28 changes: 18 additions & 10 deletions latex.go
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Original file line number Diff line number Diff line change
Expand Up @@ -41,20 +41,16 @@ func (options *Latex) GetFlags() int {

// render code chunks using verbatim, or listings if we have a language
func (options *Latex) BlockCode(out *bytes.Buffer, text []byte, info string) {
if info == "" {
out.WriteString("\n\\begin{verbatim}\n")
} else {
out.WriteString("\n\\begin{lstlisting}")
if info != "" {
lang := strings.Fields(info)[0]
out.WriteString("\n\\begin{lstlisting}[language=")
out.WriteString("[language=")
out.WriteString(lang)
out.WriteString("]\n")
out.WriteByte(']')
}
out.WriteString("\n")
out.Write(text)
if info == "" {
out.WriteString("\n\\end{verbatim}\n")
} else {
out.WriteString("\n\\end{lstlisting}\n")
}
out.WriteString("\n\\end{lstlisting}\n")
}

func (options *Latex) TitleBlock(out *bytes.Buffer, text []byte) {
Expand Down Expand Up @@ -304,9 +300,11 @@ func (options *Latex) DocumentHeader(out *bytes.Buffer) {
out.WriteString("\\documentclass{article}\n")
out.WriteString("\n")
out.WriteString("\\usepackage{graphicx}\n")
out.WriteString("\\usepackage[dvipsnames]{xcolor}\n")
out.WriteString("\\usepackage{listings}\n")
out.WriteString("\\usepackage[margin=1in]{geometry}\n")
out.WriteString("\\usepackage[utf8]{inputenc}\n")
out.WriteString("\\usepackage[T1]{fontenc}\n")
out.WriteString("\\usepackage{verbatim}\n")
out.WriteString("\\usepackage[normalem]{ulem}\n")
out.WriteString("\\usepackage{hyperref}\n")
Expand All @@ -326,6 +324,16 @@ func (options *Latex) DocumentHeader(out *bytes.Buffer) {
out.WriteString("\\addtolength{\\parskip}{0.5\\baselineskip}\n")
out.WriteString("\\parindent=0pt\n")
out.WriteString("\n")
// lstset with most settings taken from https://tex.stackexchange.com/questions/24528/having-problems-with-listings-and-utf-8-can-it-be-fixed
out.WriteString("\n\\lstset{\n")
out.WriteString(" numberstyle=\\tiny, stepnumber=2, numbersep=5pt,\n")
out.WriteString(" keywordstyle=\\color{blue}\\bfseries, stringstyle=\\color{OliveGreen}, frame=single,\n")
out.WriteString(" backgroundcolor=\\color{gray!10},\n")
out.WriteString(" inputencoding=utf8,\n")
out.WriteString(" extendedchars=true,\n")
out.WriteString(" literate={-}{-}1 {*}{*}1 {'}{'}1 {á}{{\\'a}}1 {é}{{\\'e}}1 {í}{{\\'i}}1 {ó}{{\\'o}}1 {ú}{{\\'u}}1 {ü}{{\\:u}}1,\n") // Copy pasteable code and accents
out.WriteString(" breaklines=true, basicstyle=\\ttfamily, columns=fullflexible, keepspaces=true, showstringspaces=false,\n") // Copy pasteable code
out.WriteString("}\n")
out.WriteString("\\begin{document}\n")
}

Expand Down