func validateLink(url string) bool {
str := html.ReplaceEntities(url)
str = strings.TrimSpace(str)
str = strings.ToLower(str)
if strings.IndexByte(str, ':') >= 0 {
proto := strings.SplitN(str, ":", 2)[0]
proto = removeSpecial(proto)
for _, p := range badProtos {
if proto == p {
return false
}
}
if proto == "data" && !rGoodData.MatchString(str) {
return false
}
}
return true
}
func (r *Renderer) renderToken(tokens []Token, idx int, options RenderOptions) {
tok := tokens[idx]
switch tok := tok.(type) {
case *BlockquoteClose:
r.w.WriteString("</blockquote>")
case *BlockquoteOpen:
r.w.WriteString("<blockquote>")
case *BulletListClose:
r.w.WriteString("</ul>")
case *BulletListOpen:
r.w.WriteString("<ul>")
case *CodeBlock:
r.w.WriteString("<pre><code>")
html.WriteEscapedString(r.w, tok.Content)
r.w.WriteString("</code></pre>")
case *CodeInline:
r.w.WriteString("<code>")
html.WriteEscapedString(r.w, tok.Content)
r.w.WriteString("</code>")
case *EmphasisClose:
r.w.WriteString("</em>")
case *EmphasisOpen:
r.w.WriteString("<em>")
case *Fence:
r.w.WriteString("<pre><code")
if tok.Params != "" {
langName := strings.SplitN(unescapeAll(tok.Params), " ", 2)[0]
r.w.WriteString(` class="`)
r.w.WriteString(options.LangPrefix)
html.WriteEscapedString(r.w, langName)
r.w.WriteByte('"')
}
r.w.WriteByte('>')
html.WriteEscapedString(r.w, tok.Content)
r.w.WriteString("</code></pre>")
case *Hardbreak:
if options.XHTML {
r.w.WriteString("<br />\n")
} else {
r.w.WriteString("<br>\n")
}
case *HeadingClose:
r.w.WriteString("</h")
r.w.WriteByte("0123456789"[tok.HLevel])
r.w.WriteString(">")
case *HeadingOpen:
r.w.WriteString("<h")
r.w.WriteByte("0123456789"[tok.HLevel])
r.w.WriteByte('>')
case *Hr:
if options.XHTML {
r.w.WriteString("<hr />")
} else {
r.w.WriteString("<hr>")
}
case *HTMLBlock:
r.w.WriteString(tok.Content)
return // no newline
case *HTMLInline:
r.w.WriteString(tok.Content)
case *Image:
r.w.WriteString(`<img src="`)
html.WriteEscapedString(r.w, tok.Src)
r.w.WriteString(`" alt="`)
r.renderInlineAsText(tok.Tokens)
r.w.WriteByte('"')
if tok.Title != "" {
r.w.WriteString(` title="`)
html.WriteEscapedString(r.w, html.ReplaceEntities(tok.Title))
r.w.WriteByte('"')
}
if options.XHTML {
r.w.WriteString(" />")
} else {
r.w.WriteByte('>')
}
case *LinkClose:
r.w.WriteString("</a>")
case *LinkOpen:
r.w.WriteString(`<a href="`)
html.WriteEscapedString(r.w, tok.Href)
r.w.WriteByte('"')
if tok.Title != "" {
r.w.WriteString(` title="`)
html.WriteEscapedString(r.w, html.ReplaceEntities(tok.Title))
r.w.WriteByte('"')
}
if tok.Target != "" {
r.w.WriteString(` target="`)
html.WriteEscapedString(r.w, tok.Target)
r.w.WriteByte('"')
}
if options.Nofollow {
r.w.WriteString(` rel="nofollow"`)
}
r.w.WriteByte('>')
case *ListItemClose:
r.w.WriteString("</li>")
case *ListItemOpen:
r.w.WriteString("<li>")
case *OrderedListClose:
r.w.WriteString("</ol>")
case *OrderedListOpen:
if tok.Order != 1 {
r.w.WriteString(`<ol start="`)
r.w.WriteString(strconv.Itoa(tok.Order))
r.w.WriteString(`">`)
} else {
r.w.WriteString("<ol>")
}
case *ParagraphClose:
if !tok.Tight {
r.w.WriteString("</p>")
} else if tokens[idx+1].Closing() {
return // no newline
}
case *ParagraphOpen:
if !tok.Tight {
r.w.WriteString("<p>")
}
case *Softbreak:
if options.Breaks {
if options.XHTML {
r.w.WriteString("<br />\n")
} else {
r.w.WriteString("<br>\n")
}
} else {
r.w.WriteByte('\n')
}
return
case *StrongClose:
r.w.WriteString("</strong>")
case *StrongOpen:
r.w.WriteString("<strong>")
case *StrikethroughClose:
r.w.WriteString("</s>")
case *StrikethroughOpen:
r.w.WriteString("<s>")
case *TableClose:
r.w.WriteString("</table>")
case *TableOpen:
r.w.WriteString("<table>")
case *TbodyClose:
r.w.WriteString("</tbody>")
case *TbodyOpen:
r.w.WriteString("<tbody>")
case *TdClose:
r.w.WriteString("</td>")
case *TdOpen:
if tok.Align != AlignNone {
r.w.WriteString(`<td style="text-align:`)
r.w.WriteString(tok.Align.String())
r.w.WriteString(`">`)
} else {
r.w.WriteString("<td>")
}
case *Text:
html.WriteEscapedString(r.w, tok.Content)
case *TheadClose:
r.w.WriteString("</thead>")
case *TheadOpen:
r.w.WriteString("<thead>")
case *ThClose:
r.w.WriteString("</th>")
case *ThOpen:
if align := tok.Align; align != AlignNone {
r.w.WriteString(`<th style="text-align:`)
r.w.WriteString(align.String())
r.w.WriteString(`">`)
} else {
r.w.WriteString("<th>")
}
case *TrClose:
r.w.WriteString("</tr>")
case *TrOpen:
r.w.WriteString("<tr>")
default:
panic("unknown token type")
}
needLf := false
if tok.Block() {
needLf = true
if tok.Opening() {
nextTok := tokens[idx+1]
switch nextTok := nextTok.(type) {
case *Inline:
needLf = false
case *ParagraphOpen:
if nextTok.Tight {
needLf = false
}
case *ParagraphClose:
if nextTok.Tight {
needLf = false
}
}
if needLf && nextTok.Closing() && nextTok.Tag() == tok.Tag() {
needLf = false
}
}
}
if needLf {
r.w.WriteByte('\n')
}
}