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mirror of https://github.com/danog/blackfriday.git synced 2025-01-23 05:41:27 +01:00

The single node renderer is a separate func now

A default HTML renderer for a single node is now easily accessible.
Makes it easy to fall back to the default behavior when writing custom
HTML renderers.
This commit is contained in:
Vytautas Šaltenis 2016-03-30 15:48:43 +03:00
parent 886a1405c0
commit 0382dab0c3

598
html.go
View File

@ -1211,306 +1211,308 @@ func (r *Html) cr() {
}
}
func (r *Html) RenderNode(node *Node, entering bool) {
attrs := []string{}
switch node.Type {
case Text:
if r.flags&UseSmartypants != 0 && isSmartypantable(node) {
// TODO: don't do that in renderer, do that at parse time!
r.out(r.Smartypants2(node.Literal))
} else {
r.out(esc(node.Literal, false))
}
break
case Softbreak:
r.out([]byte("\n"))
// TODO: make it configurable via out(renderer.softbreak)
case Hardbreak:
r.out(tag("br", nil, true))
r.cr()
case Emph:
if entering {
r.out(tag("em", nil, false))
} else {
r.out(tag("/em", nil, false))
}
break
case Strong:
if entering {
r.out(tag("strong", nil, false))
} else {
r.out(tag("/strong", nil, false))
}
break
case Del:
if entering {
r.out(tag("del", nil, false))
} else {
r.out(tag("/del", nil, false))
}
case HtmlSpan:
//if options.safe {
// out("<!-- raw HTML omitted -->")
//} else {
r.out(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 r.flags&Safelink != 0 && !isSafeLink(dest) && !isMailto(dest) {
if entering {
r.out(tag("tt", nil, false))
} else {
r.out(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, true)))
//}
if node.NoteID != 0 {
r.out(footnoteRef(r.parameters.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, true)))
}
r.out(tag("a", attrs, false))
} else {
if node.NoteID != 0 {
break
}
r.out(tag("/a", nil, false))
}
}
case Image:
if entering {
dest := node.LinkData.Destination
dest = r.addAbsPrefix(dest)
if r.disableTags == 0 {
//if options.safe && potentiallyUnsafe(dest) {
//out(`<img src="" alt="`)
//} else {
r.out([]byte(fmt.Sprintf(`<img src="%s" alt="`, esc(dest, true))))
//}
}
r.disableTags++
} else {
r.disableTags--
if r.disableTags == 0 {
if node.LinkData.Title != nil {
r.out([]byte(`" title="`))
r.out(esc(node.LinkData.Title, true))
}
r.out([]byte(`" />`))
}
}
case Code:
r.out(tag("code", nil, false))
r.out(escCode(node.Literal, false))
r.out(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()
}
}
if node.Parent.Type == BlockQuote && node.Prev == nil {
r.cr()
}
r.out(tag("p", attrs, false))
} else {
r.out(tag("/p", attrs, false))
if !(node.Parent.Type == Item && node.Next == nil) {
r.cr()
}
}
break
case BlockQuote:
if entering {
r.cr()
r.out(tag("blockquote", attrs, false))
} else {
r.out(tag("/blockquote", nil, false))
r.cr()
}
break
case HtmlBlock:
r.cr()
r.out(node.Literal)
r.cr()
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.parameters.HeaderIDPrefix != "" {
id = r.parameters.HeaderIDPrefix + id
}
if r.parameters.HeaderIDSuffix != "" {
id = id + r.parameters.HeaderIDSuffix
}
attrs = append(attrs, fmt.Sprintf(`id="%s"`, id))
}
r.cr()
r.out(tag(tagname, attrs, false))
} else {
r.out(tag("/"+tagname, nil, false))
if !(node.Parent.Type == Item && node.Next == nil) {
r.cr()
}
}
break
case HorizontalRule:
r.cr()
r.out(tag("hr", attrs, r.flags&UseXHTML != 0))
r.cr()
break
case List:
tagName := "ul"
if node.ListData.Flags&ListTypeOrdered != 0 {
tagName = "ol"
}
if node.ListData.Flags&ListTypeDefinition != 0 {
tagName = "dl"
}
if entering {
// var start = node.listStart;
// if (start !== null && start !== 1) {
// attrs.push(['start', start.toString()]);
// }
r.cr()
if node.Parent.Type == Item && node.Parent.Parent.ListData.Tight {
r.cr()
}
r.out(tag(tagName, attrs, false))
r.cr()
} else {
r.out(tag("/"+tagName, nil, false))
//cr()
//if node.parent.Type != Item {
// cr()
//}
if node.Parent.Type == Item && node.Next != nil {
r.cr()
}
if node.Parent.Type == Document || node.Parent.Type == BlockQuote {
r.cr()
}
}
case Item:
tagName := "li"
if node.ListData.Flags&ListTypeDefinition != 0 {
tagName = "dd"
}
if node.ListData.Flags&ListTypeTerm != 0 {
tagName = "dt"
}
if entering {
if itemOpenCR(node) {
r.cr()
}
if node.ListData.RefLink != nil {
slug := slugify(node.ListData.RefLink)
r.out(footnoteItem(r.parameters.FootnoteAnchorPrefix, slug))
break
}
r.out(tag(tagName, nil, false))
} else {
if node.ListData.RefLink != nil {
slug := slugify(node.ListData.RefLink)
if r.flags&FootnoteReturnLinks != 0 {
r.out(footnoteReturnLink(r.parameters.FootnoteAnchorPrefix, r.parameters.FootnoteReturnLinkContents, slug))
}
}
r.out(tag("/"+tagName, nil, false))
r.cr()
}
case CodeBlock:
attrs = appendLanguageAttr(attrs, node.Info)
r.cr()
r.out(tag("pre", nil, false))
r.out(tag("code", attrs, false))
r.out(escCode(node.Literal, false))
r.out(tag("/code", nil, false))
r.out(tag("/pre", nil, false))
if node.Parent.Type != Item {
r.cr()
}
case Table:
if entering {
r.cr()
r.out(tag("table", nil, false))
} else {
r.out(tag("/table", nil, false))
r.cr()
}
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()
}
r.out(tag(tagName, attrs, false))
} else {
r.out(tag("/"+tagName, nil, false))
r.cr()
}
case TableHead:
if entering {
r.cr()
r.out(tag("thead", nil, false))
} else {
r.out(tag("/thead", nil, false))
r.cr()
}
case TableBody:
if entering {
r.cr()
r.out(tag("tbody", nil, false))
// XXX: this is to adhere to a rather silly test. Should fix test.
if node.FirstChild == nil {
r.cr()
}
} else {
r.out(tag("/tbody", nil, false))
r.cr()
}
case TableRow:
if entering {
r.cr()
r.out(tag("tr", nil, false))
} else {
r.out(tag("/tr", nil, false))
r.cr()
}
default:
panic("Unknown node type " + node.Type.String())
}
}
func (r *Html) Render(ast *Node) []byte {
//println("render_Blackfriday")
//dump(ast)
ForEachNode(ast, func(node *Node, entering bool) {
attrs := []string{}
switch node.Type {
case Text:
if r.flags&UseSmartypants != 0 && isSmartypantable(node) {
// TODO: don't do that in renderer, do that at parse time!
r.out(r.Smartypants2(node.Literal))
} else {
r.out(esc(node.Literal, false))
}
break
case Softbreak:
r.out([]byte("\n"))
// TODO: make it configurable via out(renderer.softbreak)
case Hardbreak:
r.out(tag("br", nil, true))
r.cr()
case Emph:
if entering {
r.out(tag("em", nil, false))
} else {
r.out(tag("/em", nil, false))
}
break
case Strong:
if entering {
r.out(tag("strong", nil, false))
} else {
r.out(tag("/strong", nil, false))
}
break
case Del:
if entering {
r.out(tag("del", nil, false))
} else {
r.out(tag("/del", nil, false))
}
case HtmlSpan:
//if options.safe {
// out("<!-- raw HTML omitted -->")
//} else {
r.out(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 r.flags&Safelink != 0 && !isSafeLink(dest) && !isMailto(dest) {
if entering {
r.out(tag("tt", nil, false))
} else {
r.out(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, true)))
//}
if node.NoteID != 0 {
r.out(footnoteRef(r.parameters.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, true)))
}
r.out(tag("a", attrs, false))
} else {
if node.NoteID != 0 {
break
}
r.out(tag("/a", nil, false))
}
}
case Image:
if entering {
dest := node.LinkData.Destination
dest = r.addAbsPrefix(dest)
if r.disableTags == 0 {
//if options.safe && potentiallyUnsafe(dest) {
//out(`<img src="" alt="`)
//} else {
r.out([]byte(fmt.Sprintf(`<img src="%s" alt="`, esc(dest, true))))
//}
}
r.disableTags++
} else {
r.disableTags--
if r.disableTags == 0 {
if node.LinkData.Title != nil {
r.out([]byte(`" title="`))
r.out(esc(node.LinkData.Title, true))
}
r.out([]byte(`" />`))
}
}
case Code:
r.out(tag("code", nil, false))
r.out(escCode(node.Literal, false))
r.out(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()
}
}
if node.Parent.Type == BlockQuote && node.Prev == nil {
r.cr()
}
r.out(tag("p", attrs, false))
} else {
r.out(tag("/p", attrs, false))
if !(node.Parent.Type == Item && node.Next == nil) {
r.cr()
}
}
break
case BlockQuote:
if entering {
r.cr()
r.out(tag("blockquote", attrs, false))
} else {
r.out(tag("/blockquote", nil, false))
r.cr()
}
break
case HtmlBlock:
r.cr()
r.out(node.Literal)
r.cr()
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.parameters.HeaderIDPrefix != "" {
id = r.parameters.HeaderIDPrefix + id
}
if r.parameters.HeaderIDSuffix != "" {
id = id + r.parameters.HeaderIDSuffix
}
attrs = append(attrs, fmt.Sprintf(`id="%s"`, id))
}
r.cr()
r.out(tag(tagname, attrs, false))
} else {
r.out(tag("/"+tagname, nil, false))
if !(node.Parent.Type == Item && node.Next == nil) {
r.cr()
}
}
break
case HorizontalRule:
r.cr()
r.out(tag("hr", attrs, r.flags&UseXHTML != 0))
r.cr()
break
case List:
tagName := "ul"
if node.ListData.Flags&ListTypeOrdered != 0 {
tagName = "ol"
}
if node.ListData.Flags&ListTypeDefinition != 0 {
tagName = "dl"
}
if entering {
// var start = node.listStart;
// if (start !== null && start !== 1) {
// attrs.push(['start', start.toString()]);
// }
r.cr()
if node.Parent.Type == Item && node.Parent.Parent.ListData.Tight {
r.cr()
}
r.out(tag(tagName, attrs, false))
r.cr()
} else {
r.out(tag("/"+tagName, nil, false))
//cr()
//if node.parent.Type != Item {
// cr()
//}
if node.Parent.Type == Item && node.Next != nil {
r.cr()
}
if node.Parent.Type == Document || node.Parent.Type == BlockQuote {
r.cr()
}
}
case Item:
tagName := "li"
if node.ListData.Flags&ListTypeDefinition != 0 {
tagName = "dd"
}
if node.ListData.Flags&ListTypeTerm != 0 {
tagName = "dt"
}
if entering {
if itemOpenCR(node) {
r.cr()
}
if node.ListData.RefLink != nil {
slug := slugify(node.ListData.RefLink)
r.out(footnoteItem(r.parameters.FootnoteAnchorPrefix, slug))
break
}
r.out(tag(tagName, nil, false))
} else {
if node.ListData.RefLink != nil {
slug := slugify(node.ListData.RefLink)
if r.flags&FootnoteReturnLinks != 0 {
r.out(footnoteReturnLink(r.parameters.FootnoteAnchorPrefix, r.parameters.FootnoteReturnLinkContents, slug))
}
}
r.out(tag("/"+tagName, nil, false))
r.cr()
}
case CodeBlock:
attrs = appendLanguageAttr(attrs, node.Info)
r.cr()
r.out(tag("pre", nil, false))
r.out(tag("code", attrs, false))
r.out(escCode(node.Literal, false))
r.out(tag("/code", nil, false))
r.out(tag("/pre", nil, false))
if node.Parent.Type != Item {
r.cr()
}
case Table:
if entering {
r.cr()
r.out(tag("table", nil, false))
} else {
r.out(tag("/table", nil, false))
r.cr()
}
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()
}
r.out(tag(tagName, attrs, false))
} else {
r.out(tag("/"+tagName, nil, false))
r.cr()
}
case TableHead:
if entering {
r.cr()
r.out(tag("thead", nil, false))
} else {
r.out(tag("/thead", nil, false))
r.cr()
}
case TableBody:
if entering {
r.cr()
r.out(tag("tbody", nil, false))
// XXX: this is to adhere to a rather silly test. Should fix test.
if node.FirstChild == nil {
r.cr()
}
} else {
r.out(tag("/tbody", nil, false))
r.cr()
}
case TableRow:
if entering {
r.cr()
r.out(tag("tr", nil, false))
} else {
r.out(tag("/tr", nil, false))
r.cr()
}
default:
panic("Unknown node type " + node.Type.String())
}
})
ForEachNode(ast, r.RenderNode)
return r.renderBuffer.Bytes()
}