mirror of
https://github.com/danog/blackfriday.git
synced 2024-11-26 20:14:43 +01:00
765 lines
19 KiB
Go
765 lines
19 KiB
Go
//
|
|
// 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.
|
|
//
|
|
|
|
//
|
|
//
|
|
// HTML rendering backend
|
|
//
|
|
//
|
|
|
|
package blackfriday
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"html"
|
|
"io"
|
|
"regexp"
|
|
"strings"
|
|
)
|
|
|
|
type HTMLFlags int
|
|
|
|
// HTML renderer configuration options.
|
|
const (
|
|
HTMLFlagsNone HTMLFlags = 0
|
|
SkipHTML HTMLFlags = 1 << iota // Skip preformatted HTML blocks
|
|
SkipStyle // Skip embedded <style> elements
|
|
SkipImages // Skip embedded images
|
|
SkipLinks // Skip all links
|
|
Safelink // Only link to trusted protocols
|
|
NofollowLinks // Only link with rel="nofollow"
|
|
NoreferrerLinks // Only link with rel="noreferrer"
|
|
HrefTargetBlank // Add a blank target
|
|
CompletePage // Generate a complete HTML page
|
|
UseXHTML // Generate XHTML output instead of HTML
|
|
FootnoteReturnLinks // Generate a link at the end of a footnote to return to the source
|
|
|
|
TagName = "[A-Za-z][A-Za-z0-9-]*"
|
|
AttributeName = "[a-zA-Z_:][a-zA-Z0-9:._-]*"
|
|
UnquotedValue = "[^\"'=<>`\\x00-\\x20]+"
|
|
SingleQuotedValue = "'[^']*'"
|
|
DoubleQuotedValue = "\"[^\"]*\""
|
|
AttributeValue = "(?:" + UnquotedValue + "|" + SingleQuotedValue + "|" + DoubleQuotedValue + ")"
|
|
AttributeValueSpec = "(?:" + "\\s*=" + "\\s*" + AttributeValue + ")"
|
|
Attribute = "(?:" + "\\s+" + AttributeName + AttributeValueSpec + "?)"
|
|
OpenTag = "<" + TagName + Attribute + "*" + "\\s*/?>"
|
|
CloseTag = "</" + TagName + "\\s*[>]"
|
|
HTMLComment = "<!---->|<!--(?:-?[^>-])(?:-?[^-])*-->"
|
|
ProcessingInstruction = "[<][?].*?[?][>]"
|
|
Declaration = "<![A-Z]+" + "\\s+[^>]*>"
|
|
CDATA = "<!\\[CDATA\\[[\\s\\S]*?\\]\\]>"
|
|
HTMLTag = "(?:" + OpenTag + "|" + CloseTag + "|" + HTMLComment + "|" +
|
|
ProcessingInstruction + "|" + Declaration + "|" + CDATA + ")"
|
|
)
|
|
|
|
var (
|
|
htmlTagRe = regexp.MustCompile("(?i)^" + HTMLTag)
|
|
)
|
|
|
|
type HTMLRendererParameters struct {
|
|
// Prepend this text to each relative URL.
|
|
AbsolutePrefix string
|
|
// Add this text to each footnote anchor, to ensure uniqueness.
|
|
FootnoteAnchorPrefix string
|
|
// Show this text inside the <a> tag for a footnote return link, if the
|
|
// HTML_FOOTNOTE_RETURN_LINKS flag is enabled. If blank, the string
|
|
// <sup>[return]</sup> is used.
|
|
FootnoteReturnLinkContents string
|
|
// If set, add this text to the front of each Header ID, to ensure
|
|
// uniqueness.
|
|
HeaderIDPrefix string
|
|
// If set, add this text to the back of each Header ID, to ensure uniqueness.
|
|
HeaderIDSuffix string
|
|
|
|
Title string // Document title (used if CompletePage is set)
|
|
CSS string // Optional CSS file URL (used if CompletePage is set)
|
|
|
|
Flags HTMLFlags // Flags allow customizing this renderer's behavior
|
|
Extensions Extensions // Extensions give Smartypants and HTML renderer access to Blackfriday's global extensions
|
|
}
|
|
|
|
// HTMLRenderer is a type that implements the Renderer interface for HTML output.
|
|
//
|
|
// Do not create this directly, instead use the NewHTMLRenderer function.
|
|
type HTMLRenderer struct {
|
|
HTMLRendererParameters
|
|
|
|
closeTag string // how to end singleton tags: either " />" or ">"
|
|
|
|
// Track header IDs to prevent ID collision in a single generation.
|
|
headerIDs map[string]int
|
|
|
|
lastOutputLen int
|
|
disableTags int
|
|
}
|
|
|
|
const (
|
|
xhtmlClose = " />"
|
|
htmlClose = ">"
|
|
)
|
|
|
|
// NewHTMLRenderer creates and configures an HTMLRenderer object, which
|
|
// satisfies the Renderer interface.
|
|
func NewHTMLRenderer(params HTMLRendererParameters) *HTMLRenderer {
|
|
// configure the rendering engine
|
|
closeTag := htmlClose
|
|
if params.Flags&UseXHTML != 0 {
|
|
closeTag = xhtmlClose
|
|
}
|
|
|
|
if params.FootnoteReturnLinkContents == "" {
|
|
params.FootnoteReturnLinkContents = `<sup>[return]</sup>`
|
|
}
|
|
|
|
return &HTMLRenderer{
|
|
HTMLRendererParameters: params,
|
|
|
|
closeTag: closeTag,
|
|
headerIDs: make(map[string]int),
|
|
}
|
|
}
|
|
|
|
func isHtmlTag(tag []byte, tagname string) bool {
|
|
found, _ := findHtmlTagPos(tag, tagname)
|
|
return found
|
|
}
|
|
|
|
// Look for a character, but ignore it when it's in any kind of quotes, it
|
|
// might be JavaScript
|
|
func skipUntilCharIgnoreQuotes(html []byte, start int, char byte) int {
|
|
inSingleQuote := false
|
|
inDoubleQuote := false
|
|
inGraveQuote := false
|
|
i := start
|
|
for i < len(html) {
|
|
switch {
|
|
case html[i] == char && !inSingleQuote && !inDoubleQuote && !inGraveQuote:
|
|
return i
|
|
case html[i] == '\'':
|
|
inSingleQuote = !inSingleQuote
|
|
case html[i] == '"':
|
|
inDoubleQuote = !inDoubleQuote
|
|
case html[i] == '`':
|
|
inGraveQuote = !inGraveQuote
|
|
}
|
|
i++
|
|
}
|
|
return start
|
|
}
|
|
|
|
func findHtmlTagPos(tag []byte, tagname string) (bool, int) {
|
|
i := 0
|
|
if i < len(tag) && tag[0] != '<' {
|
|
return false, -1
|
|
}
|
|
i++
|
|
i = skipSpace(tag, i)
|
|
|
|
if i < len(tag) && tag[i] == '/' {
|
|
i++
|
|
}
|
|
|
|
i = skipSpace(tag, i)
|
|
j := 0
|
|
for ; i < len(tag); i, j = i+1, j+1 {
|
|
if j >= len(tagname) {
|
|
break
|
|
}
|
|
|
|
if strings.ToLower(string(tag[i]))[0] != tagname[j] {
|
|
return false, -1
|
|
}
|
|
}
|
|
|
|
if i == len(tag) {
|
|
return false, -1
|
|
}
|
|
|
|
rightAngle := skipUntilCharIgnoreQuotes(tag, i, '>')
|
|
if rightAngle >= i {
|
|
return true, rightAngle
|
|
}
|
|
|
|
return false, -1
|
|
}
|
|
|
|
func skipSpace(tag []byte, i int) int {
|
|
for i < len(tag) && isspace(tag[i]) {
|
|
i++
|
|
}
|
|
return i
|
|
}
|
|
|
|
func isRelativeLink(link []byte) (yes bool) {
|
|
// a tag begin with '#'
|
|
if link[0] == '#' {
|
|
return true
|
|
}
|
|
|
|
// link begin with '/' but not '//', the second maybe a protocol relative link
|
|
if len(link) >= 2 && link[0] == '/' && link[1] != '/' {
|
|
return true
|
|
}
|
|
|
|
// only the root '/'
|
|
if len(link) == 1 && link[0] == '/' {
|
|
return true
|
|
}
|
|
|
|
// current directory : begin with "./"
|
|
if bytes.HasPrefix(link, []byte("./")) {
|
|
return true
|
|
}
|
|
|
|
// parent directory : begin with "../"
|
|
if bytes.HasPrefix(link, []byte("../")) {
|
|
return true
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
func (r *HTMLRenderer) ensureUniqueHeaderID(id string) string {
|
|
for count, found := r.headerIDs[id]; found; count, found = r.headerIDs[id] {
|
|
tmp := fmt.Sprintf("%s-%d", id, count+1)
|
|
|
|
if _, tmpFound := r.headerIDs[tmp]; !tmpFound {
|
|
r.headerIDs[id] = count + 1
|
|
id = tmp
|
|
} else {
|
|
id = id + "-1"
|
|
}
|
|
}
|
|
|
|
if _, found := r.headerIDs[id]; !found {
|
|
r.headerIDs[id] = 0
|
|
}
|
|
|
|
return id
|
|
}
|
|
|
|
func (r *HTMLRenderer) addAbsPrefix(link []byte) []byte {
|
|
if r.AbsolutePrefix != "" && isRelativeLink(link) && link[0] != '.' {
|
|
newDest := r.AbsolutePrefix
|
|
if link[0] != '/' {
|
|
newDest += "/"
|
|
}
|
|
newDest += string(link)
|
|
return []byte(newDest)
|
|
}
|
|
return link
|
|
}
|
|
|
|
func appendLinkAttrs(attrs []string, flags HTMLFlags, link []byte) []string {
|
|
if isRelativeLink(link) {
|
|
return attrs
|
|
}
|
|
val := []string{}
|
|
if flags&NofollowLinks != 0 {
|
|
val = append(val, "nofollow")
|
|
}
|
|
if flags&NoreferrerLinks != 0 {
|
|
val = append(val, "noreferrer")
|
|
}
|
|
if flags&HrefTargetBlank != 0 {
|
|
attrs = append(attrs, "target=\"_blank\"")
|
|
}
|
|
if len(val) == 0 {
|
|
return attrs
|
|
}
|
|
attr := fmt.Sprintf("rel=%q", strings.Join(val, " "))
|
|
return append(attrs, attr)
|
|
}
|
|
|
|
func isMailto(link []byte) bool {
|
|
return bytes.HasPrefix(link, []byte("mailto:"))
|
|
}
|
|
|
|
func needSkipLink(flags HTMLFlags, dest []byte) bool {
|
|
if flags&SkipLinks != 0 {
|
|
return true
|
|
}
|
|
return flags&Safelink != 0 && !isSafeLink(dest) && !isMailto(dest)
|
|
}
|
|
|
|
func isSmartypantable(node *Node) bool {
|
|
pt := node.Parent.Type
|
|
return pt != Link && pt != CodeBlock && pt != Code
|
|
}
|
|
|
|
func appendLanguageAttr(attrs []string, info []byte) []string {
|
|
infoWords := bytes.Split(info, []byte("\t "))
|
|
if len(infoWords) > 0 && len(infoWords[0]) > 0 {
|
|
attrs = append(attrs, fmt.Sprintf("class=\"language-%s\"", infoWords[0]))
|
|
}
|
|
return attrs
|
|
}
|
|
|
|
func tag(name string, attrs []string, selfClosing bool) []byte {
|
|
result := "<" + name
|
|
if attrs != nil && len(attrs) > 0 {
|
|
result += " " + strings.Join(attrs, " ")
|
|
}
|
|
if selfClosing {
|
|
result += " /"
|
|
}
|
|
return []byte(result + ">")
|
|
}
|
|
|
|
func footnoteRef(prefix string, node *Node) []byte {
|
|
urlFrag := prefix + string(slugify(node.Destination))
|
|
anchor := fmt.Sprintf(`<a rel="footnote" href="#fn:%s">%d</a>`, urlFrag, node.NoteID)
|
|
return []byte(fmt.Sprintf(`<sup class="footnote-ref" id="fnref:%s">%s</sup>`, urlFrag, anchor))
|
|
}
|
|
|
|
func footnoteItem(prefix string, slug []byte) []byte {
|
|
return []byte(fmt.Sprintf(`<li id="fn:%s%s">`, prefix, slug))
|
|
}
|
|
|
|
func footnoteReturnLink(prefix, returnLink string, slug []byte) []byte {
|
|
const format = ` <a class="footnote-return" href="#fnref:%s%s">%s</a>`
|
|
return []byte(fmt.Sprintf(format, prefix, slug, returnLink))
|
|
}
|
|
|
|
func itemOpenCR(node *Node) bool {
|
|
if node.Prev == nil {
|
|
return false
|
|
}
|
|
ld := node.Parent.ListData
|
|
return !ld.Tight && ld.ListFlags&ListTypeDefinition == 0
|
|
}
|
|
|
|
func skipParagraphTags(node *Node) bool {
|
|
grandparent := node.Parent.Parent
|
|
if grandparent == nil || grandparent.Type != List {
|
|
return false
|
|
}
|
|
tightOrTerm := grandparent.Tight || node.Parent.ListFlags&ListTypeTerm != 0
|
|
return grandparent.Type == List && tightOrTerm
|
|
}
|
|
|
|
func cellAlignment(align CellAlignFlags) string {
|
|
switch align {
|
|
case TableAlignmentLeft:
|
|
return "left"
|
|
case TableAlignmentRight:
|
|
return "right"
|
|
case TableAlignmentCenter:
|
|
return "center"
|
|
default:
|
|
return ""
|
|
}
|
|
}
|
|
|
|
func esc(text []byte) []byte {
|
|
unesc := []byte(html.UnescapeString(string(text)))
|
|
return escCode(unesc)
|
|
}
|
|
|
|
func escCode(text []byte) []byte {
|
|
e1 := []byte(html.EscapeString(string(text)))
|
|
e2 := bytes.Replace(e1, []byte("""), []byte("""), -1)
|
|
return bytes.Replace(e2, []byte("'"), []byte{'\''}, -1)
|
|
}
|
|
|
|
func (r *HTMLRenderer) out(w io.Writer, text []byte) {
|
|
if r.disableTags > 0 {
|
|
w.Write(htmlTagRe.ReplaceAll(text, []byte{}))
|
|
} else {
|
|
w.Write(text)
|
|
}
|
|
r.lastOutputLen = len(text)
|
|
}
|
|
|
|
func (r *HTMLRenderer) cr(w io.Writer) {
|
|
if r.lastOutputLen > 0 {
|
|
r.out(w, []byte{'\n'})
|
|
}
|
|
}
|
|
|
|
func (r *HTMLRenderer) RenderNode(w io.Writer, node *Node, entering bool) WalkStatus {
|
|
attrs := []string{}
|
|
switch node.Type {
|
|
case Text:
|
|
r.out(w, node.Literal)
|
|
break
|
|
case Softbreak:
|
|
r.out(w, []byte("\n"))
|
|
// TODO: make it configurable via out(renderer.softbreak)
|
|
case Hardbreak:
|
|
r.out(w, tag("br", nil, true))
|
|
r.cr(w)
|
|
case Emph:
|
|
if entering {
|
|
r.out(w, tag("em", nil, false))
|
|
} else {
|
|
r.out(w, tag("/em", nil, false))
|
|
}
|
|
break
|
|
case Strong:
|
|
if entering {
|
|
r.out(w, tag("strong", nil, false))
|
|
} else {
|
|
r.out(w, tag("/strong", nil, false))
|
|
}
|
|
break
|
|
case Del:
|
|
if entering {
|
|
r.out(w, tag("del", nil, false))
|
|
} else {
|
|
r.out(w, tag("/del", nil, false))
|
|
}
|
|
case HTMLSpan:
|
|
if r.Flags&SkipHTML != 0 {
|
|
break
|
|
}
|
|
if r.Flags&SkipStyle != 0 && isHtmlTag(node.Literal, "style") {
|
|
break
|
|
}
|
|
//if options.safe {
|
|
// out(w, "<!-- raw HTML omitted -->")
|
|
//} else {
|
|
r.out(w, node.Literal)
|
|
//}
|
|
case Link:
|
|
// mark it but don't link it if it is not a safe link: no smartypants
|
|
dest := node.LinkData.Destination
|
|
if needSkipLink(r.Flags, dest) {
|
|
if entering {
|
|
r.out(w, tag("tt", nil, false))
|
|
} else {
|
|
r.out(w, tag("/tt", nil, false))
|
|
}
|
|
} else {
|
|
if entering {
|
|
dest = r.addAbsPrefix(dest)
|
|
//if (!(options.safe && potentiallyUnsafe(node.destination))) {
|
|
attrs = append(attrs, fmt.Sprintf("href=%q", esc(dest)))
|
|
//}
|
|
if node.NoteID != 0 {
|
|
r.out(w, footnoteRef(r.FootnoteAnchorPrefix, node))
|
|
break
|
|
}
|
|
attrs = appendLinkAttrs(attrs, r.Flags, dest)
|
|
if len(node.LinkData.Title) > 0 {
|
|
attrs = append(attrs, fmt.Sprintf("title=%q", esc(node.LinkData.Title)))
|
|
}
|
|
r.out(w, tag("a", attrs, false))
|
|
} else {
|
|
if node.NoteID != 0 {
|
|
break
|
|
}
|
|
r.out(w, tag("/a", nil, false))
|
|
}
|
|
}
|
|
case Image:
|
|
if r.Flags&SkipImages != 0 {
|
|
return SkipChildren
|
|
}
|
|
if entering {
|
|
dest := node.LinkData.Destination
|
|
dest = r.addAbsPrefix(dest)
|
|
if r.disableTags == 0 {
|
|
//if options.safe && potentiallyUnsafe(dest) {
|
|
//out(w, `<img src="" alt="`)
|
|
//} else {
|
|
r.out(w, []byte(fmt.Sprintf(`<img src="%s" alt="`, esc(dest))))
|
|
//}
|
|
}
|
|
r.disableTags++
|
|
} else {
|
|
r.disableTags--
|
|
if r.disableTags == 0 {
|
|
if node.LinkData.Title != nil {
|
|
r.out(w, []byte(`" title="`))
|
|
r.out(w, esc(node.LinkData.Title))
|
|
}
|
|
r.out(w, []byte(`" />`))
|
|
}
|
|
}
|
|
case Code:
|
|
r.out(w, tag("code", nil, false))
|
|
r.out(w, escCode(node.Literal))
|
|
r.out(w, tag("/code", nil, false))
|
|
case Document:
|
|
break
|
|
case Paragraph:
|
|
if skipParagraphTags(node) {
|
|
break
|
|
}
|
|
if entering {
|
|
// TODO: untangle this clusterfuck about when the newlines need
|
|
// to be added and when not.
|
|
if node.Prev != nil {
|
|
t := node.Prev.Type
|
|
if t == HTMLBlock || t == List || t == Paragraph || t == Header || t == CodeBlock || t == BlockQuote || t == HorizontalRule {
|
|
r.cr(w)
|
|
}
|
|
}
|
|
if node.Parent.Type == BlockQuote && node.Prev == nil {
|
|
r.cr(w)
|
|
}
|
|
r.out(w, tag("p", attrs, false))
|
|
} else {
|
|
r.out(w, tag("/p", attrs, false))
|
|
if !(node.Parent.Type == Item && node.Next == nil) {
|
|
r.cr(w)
|
|
}
|
|
}
|
|
break
|
|
case BlockQuote:
|
|
if entering {
|
|
r.cr(w)
|
|
r.out(w, tag("blockquote", attrs, false))
|
|
} else {
|
|
r.out(w, tag("/blockquote", nil, false))
|
|
r.cr(w)
|
|
}
|
|
break
|
|
case HTMLBlock:
|
|
if r.Flags&SkipHTML != 0 {
|
|
break
|
|
}
|
|
r.cr(w)
|
|
r.out(w, node.Literal)
|
|
r.cr(w)
|
|
case Header:
|
|
tagname := fmt.Sprintf("h%d", node.Level)
|
|
if entering {
|
|
if node.IsTitleblock {
|
|
attrs = append(attrs, `class="title"`)
|
|
}
|
|
if node.HeaderID != "" {
|
|
id := r.ensureUniqueHeaderID(node.HeaderID)
|
|
if r.HeaderIDPrefix != "" {
|
|
id = r.HeaderIDPrefix + id
|
|
}
|
|
if r.HeaderIDSuffix != "" {
|
|
id = id + r.HeaderIDSuffix
|
|
}
|
|
attrs = append(attrs, fmt.Sprintf(`id="%s"`, id))
|
|
}
|
|
r.cr(w)
|
|
r.out(w, tag(tagname, attrs, false))
|
|
} else {
|
|
r.out(w, tag("/"+tagname, nil, false))
|
|
if !(node.Parent.Type == Item && node.Next == nil) {
|
|
r.cr(w)
|
|
}
|
|
}
|
|
break
|
|
case HorizontalRule:
|
|
r.cr(w)
|
|
r.out(w, tag("hr", attrs, r.Flags&UseXHTML != 0))
|
|
r.cr(w)
|
|
break
|
|
case List:
|
|
tagName := "ul"
|
|
if node.ListFlags&ListTypeOrdered != 0 {
|
|
tagName = "ol"
|
|
}
|
|
if node.ListFlags&ListTypeDefinition != 0 {
|
|
tagName = "dl"
|
|
}
|
|
if entering {
|
|
// var start = node.listStart;
|
|
// if (start !== null && start !== 1) {
|
|
// attrs.push(['start', start.toString()]);
|
|
// }
|
|
r.cr(w)
|
|
if node.Parent.Type == Item && node.Parent.Parent.Tight {
|
|
r.cr(w)
|
|
}
|
|
r.out(w, tag(tagName, attrs, false))
|
|
r.cr(w)
|
|
} else {
|
|
r.out(w, tag("/"+tagName, nil, false))
|
|
//cr(w)
|
|
//if node.parent.Type != Item {
|
|
// cr(w)
|
|
//}
|
|
if node.Parent.Type == Item && node.Next != nil {
|
|
r.cr(w)
|
|
}
|
|
if node.Parent.Type == Document || node.Parent.Type == BlockQuote {
|
|
r.cr(w)
|
|
}
|
|
}
|
|
case Item:
|
|
tagName := "li"
|
|
if node.ListFlags&ListTypeDefinition != 0 {
|
|
tagName = "dd"
|
|
}
|
|
if node.ListFlags&ListTypeTerm != 0 {
|
|
tagName = "dt"
|
|
}
|
|
if entering {
|
|
if itemOpenCR(node) {
|
|
r.cr(w)
|
|
}
|
|
if node.ListData.RefLink != nil {
|
|
slug := slugify(node.ListData.RefLink)
|
|
r.out(w, footnoteItem(r.FootnoteAnchorPrefix, slug))
|
|
break
|
|
}
|
|
r.out(w, tag(tagName, nil, false))
|
|
} else {
|
|
if node.ListData.RefLink != nil {
|
|
slug := slugify(node.ListData.RefLink)
|
|
if r.Flags&FootnoteReturnLinks != 0 {
|
|
r.out(w, footnoteReturnLink(r.FootnoteAnchorPrefix, r.FootnoteReturnLinkContents, slug))
|
|
}
|
|
}
|
|
r.out(w, tag("/"+tagName, nil, false))
|
|
r.cr(w)
|
|
}
|
|
case CodeBlock:
|
|
attrs = appendLanguageAttr(attrs, node.Info)
|
|
r.cr(w)
|
|
r.out(w, tag("pre", nil, false))
|
|
r.out(w, tag("code", attrs, false))
|
|
r.out(w, escCode(node.Literal))
|
|
r.out(w, tag("/code", nil, false))
|
|
r.out(w, tag("/pre", nil, false))
|
|
if node.Parent.Type != Item {
|
|
r.cr(w)
|
|
}
|
|
case Table:
|
|
if entering {
|
|
r.cr(w)
|
|
r.out(w, tag("table", nil, false))
|
|
} else {
|
|
r.out(w, tag("/table", nil, false))
|
|
r.cr(w)
|
|
}
|
|
case TableCell:
|
|
tagName := "td"
|
|
if node.IsHeader {
|
|
tagName = "th"
|
|
}
|
|
if entering {
|
|
align := cellAlignment(node.Align)
|
|
if align != "" {
|
|
attrs = append(attrs, fmt.Sprintf(`align="%s"`, align))
|
|
}
|
|
if node.Prev == nil {
|
|
r.cr(w)
|
|
}
|
|
r.out(w, tag(tagName, attrs, false))
|
|
} else {
|
|
r.out(w, tag("/"+tagName, nil, false))
|
|
r.cr(w)
|
|
}
|
|
case TableHead:
|
|
if entering {
|
|
r.cr(w)
|
|
r.out(w, tag("thead", nil, false))
|
|
} else {
|
|
r.out(w, tag("/thead", nil, false))
|
|
r.cr(w)
|
|
}
|
|
case TableBody:
|
|
if entering {
|
|
r.cr(w)
|
|
r.out(w, tag("tbody", nil, false))
|
|
// XXX: this is to adhere to a rather silly test. Should fix test.
|
|
if node.FirstChild == nil {
|
|
r.cr(w)
|
|
}
|
|
} else {
|
|
r.out(w, tag("/tbody", nil, false))
|
|
r.cr(w)
|
|
}
|
|
case TableRow:
|
|
if entering {
|
|
r.cr(w)
|
|
r.out(w, tag("tr", nil, false))
|
|
} else {
|
|
r.out(w, tag("/tr", nil, false))
|
|
r.cr(w)
|
|
}
|
|
default:
|
|
panic("Unknown node type " + node.Type.String())
|
|
}
|
|
return GoToNext
|
|
}
|
|
|
|
func (r *HTMLRenderer) writeDocumentHeader(w *bytes.Buffer, sr *SPRenderer) {
|
|
if r.Flags&CompletePage == 0 {
|
|
return
|
|
}
|
|
ending := ""
|
|
if r.Flags&UseXHTML != 0 {
|
|
w.WriteString("<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" ")
|
|
w.WriteString("\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n")
|
|
w.WriteString("<html xmlns=\"http://www.w3.org/1999/xhtml\">\n")
|
|
ending = " /"
|
|
} else {
|
|
w.WriteString("<!DOCTYPE html>\n")
|
|
w.WriteString("<html>\n")
|
|
}
|
|
w.WriteString("<head>\n")
|
|
w.WriteString(" <title>")
|
|
if r.Extensions&Smartypants != 0 {
|
|
w.Write(sr.Process([]byte(r.Title)))
|
|
} else {
|
|
w.Write(esc([]byte(r.Title)))
|
|
}
|
|
w.WriteString("</title>\n")
|
|
w.WriteString(" <meta name=\"GENERATOR\" content=\"Blackfriday Markdown Processor v")
|
|
w.WriteString(VERSION)
|
|
w.WriteString("\"")
|
|
w.WriteString(ending)
|
|
w.WriteString(">\n")
|
|
w.WriteString(" <meta charset=\"utf-8\"")
|
|
w.WriteString(ending)
|
|
w.WriteString(">\n")
|
|
if r.CSS != "" {
|
|
w.WriteString(" <link rel=\"stylesheet\" type=\"text/css\" href=\"")
|
|
w.Write(esc([]byte(r.CSS)))
|
|
w.WriteString("\"")
|
|
w.WriteString(ending)
|
|
w.WriteString(">\n")
|
|
}
|
|
w.WriteString("</head>\n")
|
|
w.WriteString("<body>\n\n")
|
|
}
|
|
|
|
func (r *HTMLRenderer) writeDocumentFooter(w *bytes.Buffer) {
|
|
if r.Flags&CompletePage == 0 {
|
|
return
|
|
}
|
|
w.WriteString("\n</body>\n</html>\n")
|
|
}
|
|
|
|
func (r *HTMLRenderer) Render(ast *Node) []byte {
|
|
//println("render_Blackfriday")
|
|
//dump(ast)
|
|
// Run Smartypants if it's enabled or simply escape text if not
|
|
sr := NewSmartypantsRenderer(r.Extensions)
|
|
ast.Walk(func(node *Node, entering bool) WalkStatus {
|
|
if node.Type == Text {
|
|
if r.Extensions&Smartypants != 0 {
|
|
node.Literal = sr.Process(node.Literal)
|
|
} else {
|
|
node.Literal = esc(node.Literal)
|
|
}
|
|
}
|
|
return GoToNext
|
|
})
|
|
var buff bytes.Buffer
|
|
r.writeDocumentHeader(&buff, sr)
|
|
ast.Walk(func(node *Node, entering bool) WalkStatus {
|
|
return r.RenderNode(&buff, node, entering)
|
|
})
|
|
r.writeDocumentFooter(&buff)
|
|
return buff.Bytes()
|
|
}
|