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-rw-r--r--vendor/github.com/russross/blackfriday/latex.go334
1 files changed, 334 insertions, 0 deletions
diff --git a/vendor/github.com/russross/blackfriday/latex.go b/vendor/github.com/russross/blackfriday/latex.go
new file mode 100644
index 00000000..3d30d094
--- /dev/null
+++ b/vendor/github.com/russross/blackfriday/latex.go
@@ -0,0 +1,334 @@
+//
+// Blackfriday Markdown Processor
+// Available at http://github.com/russross/blackfriday
+//
+// Copyright © 2011 Russ Ross <russ@russross.com>.
+// Distributed under the Simplified BSD License.
+// See README.md for details.
+//
+
+//
+//
+// LaTeX rendering backend
+//
+//
+
+package blackfriday
+
+import (
+ "bytes"
+ "strings"
+)
+
+// Latex is a type that implements the Renderer interface for LaTeX output.
+//
+// Do not create this directly, instead use the LatexRenderer function.
+type Latex struct {
+}
+
+// LatexRenderer creates and configures a Latex object, which
+// satisfies the Renderer interface.
+//
+// flags is a set of LATEX_* options ORed together (currently no such options
+// are defined).
+func LatexRenderer(flags int) Renderer {
+ return &Latex{}
+}
+
+func (options *Latex) GetFlags() int {
+ return 0
+}
+
+// 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 {
+ lang := strings.Fields(info)[0]
+ out.WriteString("\n\\begin{lstlisting}[language=")
+ out.WriteString(lang)
+ out.WriteString("]\n")
+ }
+ out.Write(text)
+ if info == "" {
+ out.WriteString("\n\\end{verbatim}\n")
+ } else {
+ out.WriteString("\n\\end{lstlisting}\n")
+ }
+}
+
+func (options *Latex) TitleBlock(out *bytes.Buffer, text []byte) {
+
+}
+
+func (options *Latex) BlockQuote(out *bytes.Buffer, text []byte) {
+ out.WriteString("\n\\begin{quotation}\n")
+ out.Write(text)
+ out.WriteString("\n\\end{quotation}\n")
+}
+
+func (options *Latex) BlockHtml(out *bytes.Buffer, text []byte) {
+ // a pretty lame thing to do...
+ out.WriteString("\n\\begin{verbatim}\n")
+ out.Write(text)
+ out.WriteString("\n\\end{verbatim}\n")
+}
+
+func (options *Latex) Header(out *bytes.Buffer, text func() bool, level int, id string) {
+ marker := out.Len()
+
+ switch level {
+ case 1:
+ out.WriteString("\n\\section{")
+ case 2:
+ out.WriteString("\n\\subsection{")
+ case 3:
+ out.WriteString("\n\\subsubsection{")
+ case 4:
+ out.WriteString("\n\\paragraph{")
+ case 5:
+ out.WriteString("\n\\subparagraph{")
+ case 6:
+ out.WriteString("\n\\textbf{")
+ }
+ if !text() {
+ out.Truncate(marker)
+ return
+ }
+ out.WriteString("}\n")
+}
+
+func (options *Latex) HRule(out *bytes.Buffer) {
+ out.WriteString("\n\\HRule\n")
+}
+
+func (options *Latex) List(out *bytes.Buffer, text func() bool, flags int) {
+ marker := out.Len()
+ if flags&LIST_TYPE_ORDERED != 0 {
+ out.WriteString("\n\\begin{enumerate}\n")
+ } else {
+ out.WriteString("\n\\begin{itemize}\n")
+ }
+ if !text() {
+ out.Truncate(marker)
+ return
+ }
+ if flags&LIST_TYPE_ORDERED != 0 {
+ out.WriteString("\n\\end{enumerate}\n")
+ } else {
+ out.WriteString("\n\\end{itemize}\n")
+ }
+}
+
+func (options *Latex) ListItem(out *bytes.Buffer, text []byte, flags int) {
+ out.WriteString("\n\\item ")
+ out.Write(text)
+}
+
+func (options *Latex) Paragraph(out *bytes.Buffer, text func() bool) {
+ marker := out.Len()
+ out.WriteString("\n")
+ if !text() {
+ out.Truncate(marker)
+ return
+ }
+ out.WriteString("\n")
+}
+
+func (options *Latex) Table(out *bytes.Buffer, header []byte, body []byte, columnData []int) {
+ out.WriteString("\n\\begin{tabular}{")
+ for _, elt := range columnData {
+ switch elt {
+ case TABLE_ALIGNMENT_LEFT:
+ out.WriteByte('l')
+ case TABLE_ALIGNMENT_RIGHT:
+ out.WriteByte('r')
+ default:
+ out.WriteByte('c')
+ }
+ }
+ out.WriteString("}\n")
+ out.Write(header)
+ out.WriteString(" \\\\\n\\hline\n")
+ out.Write(body)
+ out.WriteString("\n\\end{tabular}\n")
+}
+
+func (options *Latex) TableRow(out *bytes.Buffer, text []byte) {
+ if out.Len() > 0 {
+ out.WriteString(" \\\\\n")
+ }
+ out.Write(text)
+}
+
+func (options *Latex) TableHeaderCell(out *bytes.Buffer, text []byte, align int) {
+ if out.Len() > 0 {
+ out.WriteString(" & ")
+ }
+ out.Write(text)
+}
+
+func (options *Latex) TableCell(out *bytes.Buffer, text []byte, align int) {
+ if out.Len() > 0 {
+ out.WriteString(" & ")
+ }
+ out.Write(text)
+}
+
+// TODO: this
+func (options *Latex) Footnotes(out *bytes.Buffer, text func() bool) {
+
+}
+
+func (options *Latex) FootnoteItem(out *bytes.Buffer, name, text []byte, flags int) {
+
+}
+
+func (options *Latex) AutoLink(out *bytes.Buffer, link []byte, kind int) {
+ out.WriteString("\\href{")
+ if kind == LINK_TYPE_EMAIL {
+ out.WriteString("mailto:")
+ }
+ out.Write(link)
+ out.WriteString("}{")
+ out.Write(link)
+ out.WriteString("}")
+}
+
+func (options *Latex) CodeSpan(out *bytes.Buffer, text []byte) {
+ out.WriteString("\\texttt{")
+ escapeSpecialChars(out, text)
+ out.WriteString("}")
+}
+
+func (options *Latex) DoubleEmphasis(out *bytes.Buffer, text []byte) {
+ out.WriteString("\\textbf{")
+ out.Write(text)
+ out.WriteString("}")
+}
+
+func (options *Latex) Emphasis(out *bytes.Buffer, text []byte) {
+ out.WriteString("\\textit{")
+ out.Write(text)
+ out.WriteString("}")
+}
+
+func (options *Latex) Image(out *bytes.Buffer, link []byte, title []byte, alt []byte) {
+ if bytes.HasPrefix(link, []byte("http://")) || bytes.HasPrefix(link, []byte("https://")) {
+ // treat it like a link
+ out.WriteString("\\href{")
+ out.Write(link)
+ out.WriteString("}{")
+ out.Write(alt)
+ out.WriteString("}")
+ } else {
+ out.WriteString("\\includegraphics{")
+ out.Write(link)
+ out.WriteString("}")
+ }
+}
+
+func (options *Latex) LineBreak(out *bytes.Buffer) {
+ out.WriteString(" \\\\\n")
+}
+
+func (options *Latex) Link(out *bytes.Buffer, link []byte, title []byte, content []byte) {
+ out.WriteString("\\href{")
+ out.Write(link)
+ out.WriteString("}{")
+ out.Write(content)
+ out.WriteString("}")
+}
+
+func (options *Latex) RawHtmlTag(out *bytes.Buffer, tag []byte) {
+}
+
+func (options *Latex) TripleEmphasis(out *bytes.Buffer, text []byte) {
+ out.WriteString("\\textbf{\\textit{")
+ out.Write(text)
+ out.WriteString("}}")
+}
+
+func (options *Latex) StrikeThrough(out *bytes.Buffer, text []byte) {
+ out.WriteString("\\sout{")
+ out.Write(text)
+ out.WriteString("}")
+}
+
+// TODO: this
+func (options *Latex) FootnoteRef(out *bytes.Buffer, ref []byte, id int) {
+
+}
+
+func needsBackslash(c byte) bool {
+ for _, r := range []byte("_{}%$&\\~#") {
+ if c == r {
+ return true
+ }
+ }
+ return false
+}
+
+func escapeSpecialChars(out *bytes.Buffer, text []byte) {
+ for i := 0; i < len(text); i++ {
+ // directly copy normal characters
+ org := i
+
+ for i < len(text) && !needsBackslash(text[i]) {
+ i++
+ }
+ if i > org {
+ out.Write(text[org:i])
+ }
+
+ // escape a character
+ if i >= len(text) {
+ break
+ }
+ out.WriteByte('\\')
+ out.WriteByte(text[i])
+ }
+}
+
+func (options *Latex) Entity(out *bytes.Buffer, entity []byte) {
+ // TODO: convert this into a unicode character or something
+ out.Write(entity)
+}
+
+func (options *Latex) NormalText(out *bytes.Buffer, text []byte) {
+ escapeSpecialChars(out, text)
+}
+
+// header and footer
+func (options *Latex) DocumentHeader(out *bytes.Buffer) {
+ out.WriteString("\\documentclass{article}\n")
+ out.WriteString("\n")
+ out.WriteString("\\usepackage{graphicx}\n")
+ out.WriteString("\\usepackage{listings}\n")
+ out.WriteString("\\usepackage[margin=1in]{geometry}\n")
+ out.WriteString("\\usepackage[utf8]{inputenc}\n")
+ out.WriteString("\\usepackage{verbatim}\n")
+ out.WriteString("\\usepackage[normalem]{ulem}\n")
+ out.WriteString("\\usepackage{hyperref}\n")
+ out.WriteString("\n")
+ out.WriteString("\\hypersetup{colorlinks,%\n")
+ out.WriteString(" citecolor=black,%\n")
+ out.WriteString(" filecolor=black,%\n")
+ out.WriteString(" linkcolor=black,%\n")
+ out.WriteString(" urlcolor=black,%\n")
+ out.WriteString(" pdfstartview=FitH,%\n")
+ out.WriteString(" breaklinks=true,%\n")
+ out.WriteString(" pdfauthor={Blackfriday Markdown Processor v")
+ out.WriteString(VERSION)
+ out.WriteString("}}\n")
+ out.WriteString("\n")
+ out.WriteString("\\newcommand{\\HRule}{\\rule{\\linewidth}{0.5mm}}\n")
+ out.WriteString("\\addtolength{\\parskip}{0.5\\baselineskip}\n")
+ out.WriteString("\\parindent=0pt\n")
+ out.WriteString("\n")
+ out.WriteString("\\begin{document}\n")
+}
+
+func (options *Latex) DocumentFooter(out *bytes.Buffer) {
+ out.WriteString("\n\\end{document}\n")
+}
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