func htmlFromMarkdown(md string) string {
if len(md) == 0 {
return md
}
// Render markdown to HTML
//
htmlFlags := 0 |
blackfriday.HTML_USE_XHTML |
blackfriday.HTML_USE_SMARTYPANTS |
blackfriday.HTML_SMARTYPANTS_FRACTIONS |
blackfriday.HTML_SMARTYPANTS_LATEX_DASHES
markdownExtensions := 0 |
blackfriday.EXTENSION_NO_INTRA_EMPHASIS |
blackfriday.EXTENSION_FENCED_CODE |
blackfriday.EXTENSION_STRIKETHROUGH |
blackfriday.EXTENSION_SPACE_HEADERS
// Leading whitespace can trigger Markdown features like
// code blocks so let's avoid that by trimming the input
//
ret := string(blackfriday.MarkdownOptions(
[]byte(strings.TrimSpace(md)),
blackfriday.HtmlRenderer(htmlFlags, "", ""),
blackfriday.Options{Extensions: markdownExtensions}))
// Remove wrapping paragraph tags
//
ret = strings.TrimSpace(ret)
if strings.HasPrefix(ret, "<p>") && strings.HasSuffix(ret, "</p>") {
ret = ret[3 : len(ret)-4]
}
// Reinstate possible leading/trailing whitespace
// (the markdown compiler will have removed it)
//
if leadingSpaces := util.LeadingWhitespace(md); 0 < len(leadingSpaces) {
ret = leadingSpaces + ret
}
if trailingSpaces := util.TrailingWhitespace(md); 0 < len(trailingSpaces) {
ret = ret + trailingSpaces
}
return ret
}
func TestLeadingWhitespace(t *testing.T) {
ass := func(expected string, given string) {
assert.Equal(t, expected, util.LeadingWhitespace(given), given)
}
ass("", "")
ass("", "Moro")
ass(" ", " Moro")
ass(" ", " Moro")
ass("\t", "\tMoro")
ass(" \t ", " \t Moro")
ass("", ". Moro")
ass("", "xx Moro")
ass("", "Moro ")
ass("", "Moro ")
ass("", "Moro xx")
}