--- a/vendor/github.com/russross/blackfriday/html.go Sun Jan 13 12:58:50 2019 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,940 +0,0 @@
-//
-// 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"
- "io"
- "regexp"
- "strings"
-)
-
-// HTMLFlags control optional behavior of HTML renderer.
-type HTMLFlags int
-
-// HTML renderer configuration options.
-const (
- HTMLFlagsNone HTMLFlags = 0
- SkipHTML HTMLFlags = 1 << iota // Skip preformatted HTML blocks
- 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
- Smartypants // Enable smart punctuation substitutions
- SmartypantsFractions // Enable smart fractions (with Smartypants)
- SmartypantsDashes // Enable smart dashes (with Smartypants)
- SmartypantsLatexDashes // Enable LaTeX-style dashes (with Smartypants)
- SmartypantsAngledQuotes // Enable angled double quotes (with Smartypants) for double quotes rendering
- SmartypantsQuotesNBSP // Enable « French guillemets » (with Smartypants)
- TOC // Generate a table of contents
-)
-
-var (
- htmlTagRe = regexp.MustCompile("(?i)^" + htmlTag)
-)
-
-const (
- htmlTag = "(?:" + openTag + "|" + closeTag + "|" + htmlComment + "|" +
- processingInstruction + "|" + declaration + "|" + cdata + ")"
- closeTag = "</" + tagName + "\\s*[>]"
- openTag = "<" + tagName + attribute + "*" + "\\s*/?>"
- attribute = "(?:" + "\\s+" + attributeName + attributeValueSpec + "?)"
- attributeValue = "(?:" + unquotedValue + "|" + singleQuotedValue + "|" + doubleQuotedValue + ")"
- attributeValueSpec = "(?:" + "\\s*=" + "\\s*" + attributeValue + ")"
- attributeName = "[a-zA-Z_:][a-zA-Z0-9:._-]*"
- cdata = "<!\\[CDATA\\[[\\s\\S]*?\\]\\]>"
- declaration = "<![A-Z]+" + "\\s+[^>]*>"
- doubleQuotedValue = "\"[^\"]*\""
- htmlComment = "<!---->|<!--(?:-?[^>-])(?:-?[^-])*-->"
- processingInstruction = "[<][?].*?[?][>]"
- singleQuotedValue = "'[^']*'"
- tagName = "[A-Za-z][A-Za-z0-9-]*"
- unquotedValue = "[^\"'=<>`\\x00-\\x20]+"
-)
-
-// HTMLRendererParameters is a collection of supplementary parameters tweaking
-// the behavior of various parts of HTML renderer.
-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 Heading ID, to ensure
- // uniqueness.
- HeadingIDPrefix string
- // If set, add this text to the back of each Heading ID, to ensure uniqueness.
- HeadingIDSuffix string
-
- Title string // Document title (used if CompletePage is set)
- CSS string // Optional CSS file URL (used if CompletePage is set)
- Icon string // Optional icon file URL (used if CompletePage is set)
-
- Flags HTMLFlags // Flags allow customizing this renderer's behavior
-}
-
-// 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 heading IDs to prevent ID collision in a single generation.
- headingIDs map[string]int
-
- lastOutputLen int
- disableTags int
-
- sr *SPRenderer
-}
-
-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,
- headingIDs: make(map[string]int),
-
- sr: NewSmartypantsRenderer(params.Flags),
- }
-}
-
-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) ensureUniqueHeadingID(id string) string {
- for count, found := r.headingIDs[id]; found; count, found = r.headingIDs[id] {
- tmp := fmt.Sprintf("%s-%d", id, count+1)
-
- if _, tmpFound := r.headingIDs[tmp]; !tmpFound {
- r.headingIDs[id] = count + 1
- id = tmp
- } else {
- id = id + "-1"
- }
- }
-
- if _, found := r.headingIDs[id]; !found {
- r.headingIDs[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 {
- if len(info) == 0 {
- return attrs
- }
- endOfLang := bytes.IndexAny(info, "\t ")
- if endOfLang < 0 {
- endOfLang = len(info)
- }
- return append(attrs, fmt.Sprintf("class=\"language-%s\"", info[:endOfLang]))
-}
-
-func (r *HTMLRenderer) tag(w io.Writer, name []byte, attrs []string) {
- w.Write(name)
- if len(attrs) > 0 {
- w.Write(spaceBytes)
- w.Write([]byte(strings.Join(attrs, " ")))
- }
- w.Write(gtBytes)
- r.lastOutputLen = 1
-}
-
-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 (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, nlBytes)
- }
-}
-
-var (
- nlBytes = []byte{'\n'}
- gtBytes = []byte{'>'}
- spaceBytes = []byte{' '}
-)
-
-var (
- brTag = []byte("<br>")
- brXHTMLTag = []byte("<br />")
- emTag = []byte("<em>")
- emCloseTag = []byte("</em>")
- strongTag = []byte("<strong>")
- strongCloseTag = []byte("</strong>")
- delTag = []byte("<del>")
- delCloseTag = []byte("</del>")
- ttTag = []byte("<tt>")
- ttCloseTag = []byte("</tt>")
- aTag = []byte("<a")
- aCloseTag = []byte("</a>")
- preTag = []byte("<pre>")
- preCloseTag = []byte("</pre>")
- codeTag = []byte("<code>")
- codeCloseTag = []byte("</code>")
- pTag = []byte("<p>")
- pCloseTag = []byte("</p>")
- blockquoteTag = []byte("<blockquote>")
- blockquoteCloseTag = []byte("</blockquote>")
- hrTag = []byte("<hr>")
- hrXHTMLTag = []byte("<hr />")
- ulTag = []byte("<ul>")
- ulCloseTag = []byte("</ul>")
- olTag = []byte("<ol>")
- olCloseTag = []byte("</ol>")
- dlTag = []byte("<dl>")
- dlCloseTag = []byte("</dl>")
- liTag = []byte("<li>")
- liCloseTag = []byte("</li>")
- ddTag = []byte("<dd>")
- ddCloseTag = []byte("</dd>")
- dtTag = []byte("<dt>")
- dtCloseTag = []byte("</dt>")
- tableTag = []byte("<table>")
- tableCloseTag = []byte("</table>")
- tdTag = []byte("<td")
- tdCloseTag = []byte("</td>")
- thTag = []byte("<th")
- thCloseTag = []byte("</th>")
- theadTag = []byte("<thead>")
- theadCloseTag = []byte("</thead>")
- tbodyTag = []byte("<tbody>")
- tbodyCloseTag = []byte("</tbody>")
- trTag = []byte("<tr>")
- trCloseTag = []byte("</tr>")
- h1Tag = []byte("<h1")
- h1CloseTag = []byte("</h1>")
- h2Tag = []byte("<h2")
- h2CloseTag = []byte("</h2>")
- h3Tag = []byte("<h3")
- h3CloseTag = []byte("</h3>")
- h4Tag = []byte("<h4")
- h4CloseTag = []byte("</h4>")
- h5Tag = []byte("<h5")
- h5CloseTag = []byte("</h5>")
- h6Tag = []byte("<h6")
- h6CloseTag = []byte("</h6>")
-
- footnotesDivBytes = []byte("\n<div class=\"footnotes\">\n\n")
- footnotesCloseDivBytes = []byte("\n</div>\n")
-)
-
-func headingTagsFromLevel(level int) ([]byte, []byte) {
- switch level {
- case 1:
- return h1Tag, h1CloseTag
- case 2:
- return h2Tag, h2CloseTag
- case 3:
- return h3Tag, h3CloseTag
- case 4:
- return h4Tag, h4CloseTag
- case 5:
- return h5Tag, h5CloseTag
- default:
- return h6Tag, h6CloseTag
- }
-}
-
-func (r *HTMLRenderer) outHRTag(w io.Writer) {
- if r.Flags&UseXHTML == 0 {
- r.out(w, hrTag)
- } else {
- r.out(w, hrXHTMLTag)
- }
-}
-
-// RenderNode is a default renderer of a single node of a syntax tree. For
-// block nodes it will be called twice: first time with entering=true, second
-// time with entering=false, so that it could know when it's working on an open
-// tag and when on close. It writes the result to w.
-//
-// The return value is a way to tell the calling walker to adjust its walk
-// pattern: e.g. it can terminate the traversal by returning Terminate. Or it
-// can ask the walker to skip a subtree of this node by returning SkipChildren.
-// The typical behavior is to return GoToNext, which asks for the usual
-// traversal to the next node.
-func (r *HTMLRenderer) RenderNode(w io.Writer, node *Node, entering bool) WalkStatus {
- attrs := []string{}
- switch node.Type {
- case Text:
- if r.Flags&Smartypants != 0 {
- var tmp bytes.Buffer
- escapeHTML(&tmp, node.Literal)
- r.sr.Process(w, tmp.Bytes())
- } else {
- if node.Parent.Type == Link {
- escLink(w, node.Literal)
- } else {
- escapeHTML(w, node.Literal)
- }
- }
- case Softbreak:
- r.cr(w)
- // TODO: make it configurable via out(renderer.softbreak)
- case Hardbreak:
- if r.Flags&UseXHTML == 0 {
- r.out(w, brTag)
- } else {
- r.out(w, brXHTMLTag)
- }
- r.cr(w)
- case Emph:
- if entering {
- r.out(w, emTag)
- } else {
- r.out(w, emCloseTag)
- }
- case Strong:
- if entering {
- r.out(w, strongTag)
- } else {
- r.out(w, strongCloseTag)
- }
- case Del:
- if entering {
- r.out(w, delTag)
- } else {
- r.out(w, delCloseTag)
- }
- case HTMLSpan:
- if r.Flags&SkipHTML != 0 {
- break
- }
- 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, ttTag)
- } else {
- r.out(w, ttCloseTag)
- }
- } else {
- if entering {
- dest = r.addAbsPrefix(dest)
- var hrefBuf bytes.Buffer
- hrefBuf.WriteString("href=\"")
- escLink(&hrefBuf, dest)
- hrefBuf.WriteByte('"')
- attrs = append(attrs, hrefBuf.String())
- if node.NoteID != 0 {
- r.out(w, footnoteRef(r.FootnoteAnchorPrefix, node))
- break
- }
- attrs = appendLinkAttrs(attrs, r.Flags, dest)
- if len(node.LinkData.Title) > 0 {
- var titleBuff bytes.Buffer
- titleBuff.WriteString("title=\"")
- escapeHTML(&titleBuff, node.LinkData.Title)
- titleBuff.WriteByte('"')
- attrs = append(attrs, titleBuff.String())
- }
- r.tag(w, aTag, attrs)
- } else {
- if node.NoteID != 0 {
- break
- }
- r.out(w, aCloseTag)
- }
- }
- 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(`<img src="`))
- escLink(w, dest)
- r.out(w, []byte(`" alt="`))
- //}
- }
- r.disableTags++
- } else {
- r.disableTags--
- if r.disableTags == 0 {
- if node.LinkData.Title != nil {
- r.out(w, []byte(`" title="`))
- escapeHTML(w, node.LinkData.Title)
- }
- r.out(w, []byte(`" />`))
- }
- }
- case Code:
- r.out(w, codeTag)
- escapeHTML(w, node.Literal)
- r.out(w, codeCloseTag)
- 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 {
- switch node.Prev.Type {
- case HTMLBlock, List, Paragraph, Heading, CodeBlock, BlockQuote, HorizontalRule:
- r.cr(w)
- }
- }
- if node.Parent.Type == BlockQuote && node.Prev == nil {
- r.cr(w)
- }
- r.out(w, pTag)
- } else {
- r.out(w, pCloseTag)
- if !(node.Parent.Type == Item && node.Next == nil) {
- r.cr(w)
- }
- }
- case BlockQuote:
- if entering {
- r.cr(w)
- r.out(w, blockquoteTag)
- } else {
- r.out(w, blockquoteCloseTag)
- r.cr(w)
- }
- case HTMLBlock:
- if r.Flags&SkipHTML != 0 {
- break
- }
- r.cr(w)
- r.out(w, node.Literal)
- r.cr(w)
- case Heading:
- openTag, closeTag := headingTagsFromLevel(node.Level)
- if entering {
- if node.IsTitleblock {
- attrs = append(attrs, `class="title"`)
- }
- if node.HeadingID != "" {
- id := r.ensureUniqueHeadingID(node.HeadingID)
- if r.HeadingIDPrefix != "" {
- id = r.HeadingIDPrefix + id
- }
- if r.HeadingIDSuffix != "" {
- id = id + r.HeadingIDSuffix
- }
- attrs = append(attrs, fmt.Sprintf(`id="%s"`, id))
- }
- r.cr(w)
- r.tag(w, openTag, attrs)
- } else {
- r.out(w, closeTag)
- if !(node.Parent.Type == Item && node.Next == nil) {
- r.cr(w)
- }
- }
- case HorizontalRule:
- r.cr(w)
- r.outHRTag(w)
- r.cr(w)
- case List:
- openTag := ulTag
- closeTag := ulCloseTag
- if node.ListFlags&ListTypeOrdered != 0 {
- openTag = olTag
- closeTag = olCloseTag
- }
- if node.ListFlags&ListTypeDefinition != 0 {
- openTag = dlTag
- closeTag = dlCloseTag
- }
- if entering {
- if node.IsFootnotesList {
- r.out(w, footnotesDivBytes)
- r.outHRTag(w)
- r.cr(w)
- }
- r.cr(w)
- if node.Parent.Type == Item && node.Parent.Parent.Tight {
- r.cr(w)
- }
- r.tag(w, openTag[:len(openTag)-1], attrs)
- r.cr(w)
- } else {
- r.out(w, closeTag)
- //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)
- }
- if node.IsFootnotesList {
- r.out(w, footnotesCloseDivBytes)
- }
- }
- case Item:
- openTag := liTag
- closeTag := liCloseTag
- if node.ListFlags&ListTypeDefinition != 0 {
- openTag = ddTag
- closeTag = ddCloseTag
- }
- if node.ListFlags&ListTypeTerm != 0 {
- openTag = dtTag
- closeTag = dtCloseTag
- }
- 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, openTag)
- } 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, closeTag)
- r.cr(w)
- }
- case CodeBlock:
- attrs = appendLanguageAttr(attrs, node.Info)
- r.cr(w)
- r.out(w, preTag)
- r.tag(w, codeTag[:len(codeTag)-1], attrs)
- escapeHTML(w, node.Literal)
- r.out(w, codeCloseTag)
- r.out(w, preCloseTag)
- if node.Parent.Type != Item {
- r.cr(w)
- }
- case Table:
- if entering {
- r.cr(w)
- r.out(w, tableTag)
- } else {
- r.out(w, tableCloseTag)
- r.cr(w)
- }
- case TableCell:
- openTag := tdTag
- closeTag := tdCloseTag
- if node.IsHeader {
- openTag = thTag
- closeTag = thCloseTag
- }
- if entering {
- align := cellAlignment(node.Align)
- if align != "" {
- attrs = append(attrs, fmt.Sprintf(`align="%s"`, align))
- }
- if node.Prev == nil {
- r.cr(w)
- }
- r.tag(w, openTag, attrs)
- } else {
- r.out(w, closeTag)
- r.cr(w)
- }
- case TableHead:
- if entering {
- r.cr(w)
- r.out(w, theadTag)
- } else {
- r.out(w, theadCloseTag)
- r.cr(w)
- }
- case TableBody:
- if entering {
- r.cr(w)
- r.out(w, tbodyTag)
- // XXX: this is to adhere to a rather silly test. Should fix test.
- if node.FirstChild == nil {
- r.cr(w)
- }
- } else {
- r.out(w, tbodyCloseTag)
- r.cr(w)
- }
- case TableRow:
- if entering {
- r.cr(w)
- r.out(w, trTag)
- } else {
- r.out(w, trCloseTag)
- r.cr(w)
- }
- default:
- panic("Unknown node type " + node.Type.String())
- }
- return GoToNext
-}
-
-// RenderHeader writes HTML document preamble and TOC if requested.
-func (r *HTMLRenderer) RenderHeader(w io.Writer, ast *Node) {
- r.writeDocumentHeader(w)
- if r.Flags&TOC != 0 {
- r.writeTOC(w, ast)
- }
-}
-
-// RenderFooter writes HTML document footer.
-func (r *HTMLRenderer) RenderFooter(w io.Writer, ast *Node) {
- if r.Flags&CompletePage == 0 {
- return
- }
- io.WriteString(w, "\n</body>\n</html>\n")
-}
-
-func (r *HTMLRenderer) writeDocumentHeader(w io.Writer) {
- if r.Flags&CompletePage == 0 {
- return
- }
- ending := ""
- if r.Flags&UseXHTML != 0 {
- io.WriteString(w, "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" ")
- io.WriteString(w, "\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n")
- io.WriteString(w, "<html xmlns=\"http://www.w3.org/1999/xhtml\">\n")
- ending = " /"
- } else {
- io.WriteString(w, "<!DOCTYPE html>\n")
- io.WriteString(w, "<html>\n")
- }
- io.WriteString(w, "<head>\n")
- io.WriteString(w, " <title>")
- if r.Flags&Smartypants != 0 {
- r.sr.Process(w, []byte(r.Title))
- } else {
- escapeHTML(w, []byte(r.Title))
- }
- io.WriteString(w, "</title>\n")
- io.WriteString(w, " <meta name=\"GENERATOR\" content=\"Blackfriday Markdown Processor v")
- io.WriteString(w, Version)
- io.WriteString(w, "\"")
- io.WriteString(w, ending)
- io.WriteString(w, ">\n")
- io.WriteString(w, " <meta charset=\"utf-8\"")
- io.WriteString(w, ending)
- io.WriteString(w, ">\n")
- if r.CSS != "" {
- io.WriteString(w, " <link rel=\"stylesheet\" type=\"text/css\" href=\"")
- escapeHTML(w, []byte(r.CSS))
- io.WriteString(w, "\"")
- io.WriteString(w, ending)
- io.WriteString(w, ">\n")
- }
- if r.Icon != "" {
- io.WriteString(w, " <link rel=\"icon\" type=\"image/x-icon\" href=\"")
- escapeHTML(w, []byte(r.Icon))
- io.WriteString(w, "\"")
- io.WriteString(w, ending)
- io.WriteString(w, ">\n")
- }
- io.WriteString(w, "</head>\n")
- io.WriteString(w, "<body>\n\n")
-}
-
-func (r *HTMLRenderer) writeTOC(w io.Writer, ast *Node) {
- buf := bytes.Buffer{}
-
- inHeading := false
- tocLevel := 0
- headingCount := 0
-
- ast.Walk(func(node *Node, entering bool) WalkStatus {
- if node.Type == Heading && !node.HeadingData.IsTitleblock {
- inHeading = entering
- if entering {
- node.HeadingID = fmt.Sprintf("toc_%d", headingCount)
- if node.Level == tocLevel {
- buf.WriteString("</li>\n\n<li>")
- } else if node.Level < tocLevel {
- for node.Level < tocLevel {
- tocLevel--
- buf.WriteString("</li>\n</ul>")
- }
- buf.WriteString("</li>\n\n<li>")
- } else {
- for node.Level > tocLevel {
- tocLevel++
- buf.WriteString("\n<ul>\n<li>")
- }
- }
-
- fmt.Fprintf(&buf, `<a href="#toc_%d">`, headingCount)
- headingCount++
- } else {
- buf.WriteString("</a>")
- }
- return GoToNext
- }
-
- if inHeading {
- return r.RenderNode(&buf, node, entering)
- }
-
- return GoToNext
- })
-
- for ; tocLevel > 0; tocLevel-- {
- buf.WriteString("</li>\n</ul>")
- }
-
- if buf.Len() > 0 {
- io.WriteString(w, "<nav>\n")
- w.Write(buf.Bytes())
- io.WriteString(w, "\n\n</nav>\n")
- }
- r.lastOutputLen = buf.Len()
-}