From 3ac1ee16f377d31a0fb80c8dae28b6239ac4229e Mon Sep 17 00:00:00 2001
From: Terin Stock <terinjokes@gmail.com>
Date: Sun, 9 Mar 2025 17:47:56 +0100
Subject: [chore] remove vendor

---
 vendor/golang.org/x/net/html/parse.go | 2464 ---------------------------------
 1 file changed, 2464 deletions(-)
 delete mode 100644 vendor/golang.org/x/net/html/parse.go

(limited to 'vendor/golang.org/x/net/html/parse.go')

diff --git a/vendor/golang.org/x/net/html/parse.go b/vendor/golang.org/x/net/html/parse.go
deleted file mode 100644
index 643c674e3..000000000
--- a/vendor/golang.org/x/net/html/parse.go
+++ /dev/null
@@ -1,2464 +0,0 @@
-// Copyright 2010 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package html
-
-import (
-	"errors"
-	"fmt"
-	"io"
-	"strings"
-
-	a "golang.org/x/net/html/atom"
-)
-
-// A parser implements the HTML5 parsing algorithm:
-// https://html.spec.whatwg.org/multipage/syntax.html#tree-construction
-type parser struct {
-	// tokenizer provides the tokens for the parser.
-	tokenizer *Tokenizer
-	// tok is the most recently read token.
-	tok Token
-	// Self-closing tags like <hr/> are treated as start tags, except that
-	// hasSelfClosingToken is set while they are being processed.
-	hasSelfClosingToken bool
-	// doc is the document root element.
-	doc *Node
-	// The stack of open elements (section 12.2.4.2) and active formatting
-	// elements (section 12.2.4.3).
-	oe, afe nodeStack
-	// Element pointers (section 12.2.4.4).
-	head, form *Node
-	// Other parsing state flags (section 12.2.4.5).
-	scripting, framesetOK bool
-	// The stack of template insertion modes
-	templateStack insertionModeStack
-	// im is the current insertion mode.
-	im insertionMode
-	// originalIM is the insertion mode to go back to after completing a text
-	// or inTableText insertion mode.
-	originalIM insertionMode
-	// fosterParenting is whether new elements should be inserted according to
-	// the foster parenting rules (section 12.2.6.1).
-	fosterParenting bool
-	// quirks is whether the parser is operating in "quirks mode."
-	quirks bool
-	// fragment is whether the parser is parsing an HTML fragment.
-	fragment bool
-	// context is the context element when parsing an HTML fragment
-	// (section 12.4).
-	context *Node
-}
-
-func (p *parser) top() *Node {
-	if n := p.oe.top(); n != nil {
-		return n
-	}
-	return p.doc
-}
-
-// Stop tags for use in popUntil. These come from section 12.2.4.2.
-var (
-	defaultScopeStopTags = map[string][]a.Atom{
-		"":     {a.Applet, a.Caption, a.Html, a.Table, a.Td, a.Th, a.Marquee, a.Object, a.Template},
-		"math": {a.AnnotationXml, a.Mi, a.Mn, a.Mo, a.Ms, a.Mtext},
-		"svg":  {a.Desc, a.ForeignObject, a.Title},
-	}
-)
-
-type scope int
-
-const (
-	defaultScope scope = iota
-	listItemScope
-	buttonScope
-	tableScope
-	tableRowScope
-	tableBodyScope
-	selectScope
-)
-
-// popUntil pops the stack of open elements at the highest element whose tag
-// is in matchTags, provided there is no higher element in the scope's stop
-// tags (as defined in section 12.2.4.2). It returns whether or not there was
-// such an element. If there was not, popUntil leaves the stack unchanged.
-//
-// For example, the set of stop tags for table scope is: "html", "table". If
-// the stack was:
-// ["html", "body", "font", "table", "b", "i", "u"]
-// then popUntil(tableScope, "font") would return false, but
-// popUntil(tableScope, "i") would return true and the stack would become:
-// ["html", "body", "font", "table", "b"]
-//
-// If an element's tag is in both the stop tags and matchTags, then the stack
-// will be popped and the function returns true (provided, of course, there was
-// no higher element in the stack that was also in the stop tags). For example,
-// popUntil(tableScope, "table") returns true and leaves:
-// ["html", "body", "font"]
-func (p *parser) popUntil(s scope, matchTags ...a.Atom) bool {
-	if i := p.indexOfElementInScope(s, matchTags...); i != -1 {
-		p.oe = p.oe[:i]
-		return true
-	}
-	return false
-}
-
-// indexOfElementInScope returns the index in p.oe of the highest element whose
-// tag is in matchTags that is in scope. If no matching element is in scope, it
-// returns -1.
-func (p *parser) indexOfElementInScope(s scope, matchTags ...a.Atom) int {
-	for i := len(p.oe) - 1; i >= 0; i-- {
-		tagAtom := p.oe[i].DataAtom
-		if p.oe[i].Namespace == "" {
-			for _, t := range matchTags {
-				if t == tagAtom {
-					return i
-				}
-			}
-			switch s {
-			case defaultScope:
-				// No-op.
-			case listItemScope:
-				if tagAtom == a.Ol || tagAtom == a.Ul {
-					return -1
-				}
-			case buttonScope:
-				if tagAtom == a.Button {
-					return -1
-				}
-			case tableScope:
-				if tagAtom == a.Html || tagAtom == a.Table || tagAtom == a.Template {
-					return -1
-				}
-			case selectScope:
-				if tagAtom != a.Optgroup && tagAtom != a.Option {
-					return -1
-				}
-			default:
-				panic("unreachable")
-			}
-		}
-		switch s {
-		case defaultScope, listItemScope, buttonScope:
-			for _, t := range defaultScopeStopTags[p.oe[i].Namespace] {
-				if t == tagAtom {
-					return -1
-				}
-			}
-		}
-	}
-	return -1
-}
-
-// elementInScope is like popUntil, except that it doesn't modify the stack of
-// open elements.
-func (p *parser) elementInScope(s scope, matchTags ...a.Atom) bool {
-	return p.indexOfElementInScope(s, matchTags...) != -1
-}
-
-// clearStackToContext pops elements off the stack of open elements until a
-// scope-defined element is found.
-func (p *parser) clearStackToContext(s scope) {
-	for i := len(p.oe) - 1; i >= 0; i-- {
-		tagAtom := p.oe[i].DataAtom
-		switch s {
-		case tableScope:
-			if tagAtom == a.Html || tagAtom == a.Table || tagAtom == a.Template {
-				p.oe = p.oe[:i+1]
-				return
-			}
-		case tableRowScope:
-			if tagAtom == a.Html || tagAtom == a.Tr || tagAtom == a.Template {
-				p.oe = p.oe[:i+1]
-				return
-			}
-		case tableBodyScope:
-			if tagAtom == a.Html || tagAtom == a.Tbody || tagAtom == a.Tfoot || tagAtom == a.Thead || tagAtom == a.Template {
-				p.oe = p.oe[:i+1]
-				return
-			}
-		default:
-			panic("unreachable")
-		}
-	}
-}
-
-// parseGenericRawTextElement implements the generic raw text element parsing
-// algorithm defined in 12.2.6.2.
-// https://html.spec.whatwg.org/multipage/parsing.html#parsing-elements-that-contain-only-text
-// TODO: Since both RAWTEXT and RCDATA states are treated as tokenizer's part
-// officially, need to make tokenizer consider both states.
-func (p *parser) parseGenericRawTextElement() {
-	p.addElement()
-	p.originalIM = p.im
-	p.im = textIM
-}
-
-// generateImpliedEndTags pops nodes off the stack of open elements as long as
-// the top node has a tag name of dd, dt, li, optgroup, option, p, rb, rp, rt or rtc.
-// If exceptions are specified, nodes with that name will not be popped off.
-func (p *parser) generateImpliedEndTags(exceptions ...string) {
-	var i int
-loop:
-	for i = len(p.oe) - 1; i >= 0; i-- {
-		n := p.oe[i]
-		if n.Type != ElementNode {
-			break
-		}
-		switch n.DataAtom {
-		case a.Dd, a.Dt, a.Li, a.Optgroup, a.Option, a.P, a.Rb, a.Rp, a.Rt, a.Rtc:
-			for _, except := range exceptions {
-				if n.Data == except {
-					break loop
-				}
-			}
-			continue
-		}
-		break
-	}
-
-	p.oe = p.oe[:i+1]
-}
-
-// addChild adds a child node n to the top element, and pushes n onto the stack
-// of open elements if it is an element node.
-func (p *parser) addChild(n *Node) {
-	if p.shouldFosterParent() {
-		p.fosterParent(n)
-	} else {
-		p.top().AppendChild(n)
-	}
-
-	if n.Type == ElementNode {
-		p.oe = append(p.oe, n)
-	}
-}
-
-// shouldFosterParent returns whether the next node to be added should be
-// foster parented.
-func (p *parser) shouldFosterParent() bool {
-	if p.fosterParenting {
-		switch p.top().DataAtom {
-		case a.Table, a.Tbody, a.Tfoot, a.Thead, a.Tr:
-			return true
-		}
-	}
-	return false
-}
-
-// fosterParent adds a child node according to the foster parenting rules.
-// Section 12.2.6.1, "foster parenting".
-func (p *parser) fosterParent(n *Node) {
-	var table, parent, prev, template *Node
-	var i int
-	for i = len(p.oe) - 1; i >= 0; i-- {
-		if p.oe[i].DataAtom == a.Table {
-			table = p.oe[i]
-			break
-		}
-	}
-
-	var j int
-	for j = len(p.oe) - 1; j >= 0; j-- {
-		if p.oe[j].DataAtom == a.Template {
-			template = p.oe[j]
-			break
-		}
-	}
-
-	if template != nil && (table == nil || j > i) {
-		template.AppendChild(n)
-		return
-	}
-
-	if table == nil {
-		// The foster parent is the html element.
-		parent = p.oe[0]
-	} else {
-		parent = table.Parent
-	}
-	if parent == nil {
-		parent = p.oe[i-1]
-	}
-
-	if table != nil {
-		prev = table.PrevSibling
-	} else {
-		prev = parent.LastChild
-	}
-	if prev != nil && prev.Type == TextNode && n.Type == TextNode {
-		prev.Data += n.Data
-		return
-	}
-
-	parent.InsertBefore(n, table)
-}
-
-// addText adds text to the preceding node if it is a text node, or else it
-// calls addChild with a new text node.
-func (p *parser) addText(text string) {
-	if text == "" {
-		return
-	}
-
-	if p.shouldFosterParent() {
-		p.fosterParent(&Node{
-			Type: TextNode,
-			Data: text,
-		})
-		return
-	}
-
-	t := p.top()
-	if n := t.LastChild; n != nil && n.Type == TextNode {
-		n.Data += text
-		return
-	}
-	p.addChild(&Node{
-		Type: TextNode,
-		Data: text,
-	})
-}
-
-// addElement adds a child element based on the current token.
-func (p *parser) addElement() {
-	p.addChild(&Node{
-		Type:     ElementNode,
-		DataAtom: p.tok.DataAtom,
-		Data:     p.tok.Data,
-		Attr:     p.tok.Attr,
-	})
-}
-
-// Section 12.2.4.3.
-func (p *parser) addFormattingElement() {
-	tagAtom, attr := p.tok.DataAtom, p.tok.Attr
-	p.addElement()
-
-	// Implement the Noah's Ark clause, but with three per family instead of two.
-	identicalElements := 0
-findIdenticalElements:
-	for i := len(p.afe) - 1; i >= 0; i-- {
-		n := p.afe[i]
-		if n.Type == scopeMarkerNode {
-			break
-		}
-		if n.Type != ElementNode {
-			continue
-		}
-		if n.Namespace != "" {
-			continue
-		}
-		if n.DataAtom != tagAtom {
-			continue
-		}
-		if len(n.Attr) != len(attr) {
-			continue
-		}
-	compareAttributes:
-		for _, t0 := range n.Attr {
-			for _, t1 := range attr {
-				if t0.Key == t1.Key && t0.Namespace == t1.Namespace && t0.Val == t1.Val {
-					// Found a match for this attribute, continue with the next attribute.
-					continue compareAttributes
-				}
-			}
-			// If we get here, there is no attribute that matches a.
-			// Therefore the element is not identical to the new one.
-			continue findIdenticalElements
-		}
-
-		identicalElements++
-		if identicalElements >= 3 {
-			p.afe.remove(n)
-		}
-	}
-
-	p.afe = append(p.afe, p.top())
-}
-
-// Section 12.2.4.3.
-func (p *parser) clearActiveFormattingElements() {
-	for {
-		if n := p.afe.pop(); len(p.afe) == 0 || n.Type == scopeMarkerNode {
-			return
-		}
-	}
-}
-
-// Section 12.2.4.3.
-func (p *parser) reconstructActiveFormattingElements() {
-	n := p.afe.top()
-	if n == nil {
-		return
-	}
-	if n.Type == scopeMarkerNode || p.oe.index(n) != -1 {
-		return
-	}
-	i := len(p.afe) - 1
-	for n.Type != scopeMarkerNode && p.oe.index(n) == -1 {
-		if i == 0 {
-			i = -1
-			break
-		}
-		i--
-		n = p.afe[i]
-	}
-	for {
-		i++
-		clone := p.afe[i].clone()
-		p.addChild(clone)
-		p.afe[i] = clone
-		if i == len(p.afe)-1 {
-			break
-		}
-	}
-}
-
-// Section 12.2.5.
-func (p *parser) acknowledgeSelfClosingTag() {
-	p.hasSelfClosingToken = false
-}
-
-// An insertion mode (section 12.2.4.1) is the state transition function from
-// a particular state in the HTML5 parser's state machine. It updates the
-// parser's fields depending on parser.tok (where ErrorToken means EOF).
-// It returns whether the token was consumed.
-type insertionMode func(*parser) bool
-
-// setOriginalIM sets the insertion mode to return to after completing a text or
-// inTableText insertion mode.
-// Section 12.2.4.1, "using the rules for".
-func (p *parser) setOriginalIM() {
-	if p.originalIM != nil {
-		panic("html: bad parser state: originalIM was set twice")
-	}
-	p.originalIM = p.im
-}
-
-// Section 12.2.4.1, "reset the insertion mode".
-func (p *parser) resetInsertionMode() {
-	for i := len(p.oe) - 1; i >= 0; i-- {
-		n := p.oe[i]
-		last := i == 0
-		if last && p.context != nil {
-			n = p.context
-		}
-
-		switch n.DataAtom {
-		case a.Select:
-			if !last {
-				for ancestor, first := n, p.oe[0]; ancestor != first; {
-					ancestor = p.oe[p.oe.index(ancestor)-1]
-					switch ancestor.DataAtom {
-					case a.Template:
-						p.im = inSelectIM
-						return
-					case a.Table:
-						p.im = inSelectInTableIM
-						return
-					}
-				}
-			}
-			p.im = inSelectIM
-		case a.Td, a.Th:
-			// TODO: remove this divergence from the HTML5 spec.
-			//
-			// See https://bugs.chromium.org/p/chromium/issues/detail?id=829668
-			p.im = inCellIM
-		case a.Tr:
-			p.im = inRowIM
-		case a.Tbody, a.Thead, a.Tfoot:
-			p.im = inTableBodyIM
-		case a.Caption:
-			p.im = inCaptionIM
-		case a.Colgroup:
-			p.im = inColumnGroupIM
-		case a.Table:
-			p.im = inTableIM
-		case a.Template:
-			// TODO: remove this divergence from the HTML5 spec.
-			if n.Namespace != "" {
-				continue
-			}
-			p.im = p.templateStack.top()
-		case a.Head:
-			// TODO: remove this divergence from the HTML5 spec.
-			//
-			// See https://bugs.chromium.org/p/chromium/issues/detail?id=829668
-			p.im = inHeadIM
-		case a.Body:
-			p.im = inBodyIM
-		case a.Frameset:
-			p.im = inFramesetIM
-		case a.Html:
-			if p.head == nil {
-				p.im = beforeHeadIM
-			} else {
-				p.im = afterHeadIM
-			}
-		default:
-			if last {
-				p.im = inBodyIM
-				return
-			}
-			continue
-		}
-		return
-	}
-}
-
-const whitespace = " \t\r\n\f"
-
-// Section 12.2.6.4.1.
-func initialIM(p *parser) bool {
-	switch p.tok.Type {
-	case TextToken:
-		p.tok.Data = strings.TrimLeft(p.tok.Data, whitespace)
-		if len(p.tok.Data) == 0 {
-			// It was all whitespace, so ignore it.
-			return true
-		}
-	case CommentToken:
-		p.doc.AppendChild(&Node{
-			Type: CommentNode,
-			Data: p.tok.Data,
-		})
-		return true
-	case DoctypeToken:
-		n, quirks := parseDoctype(p.tok.Data)
-		p.doc.AppendChild(n)
-		p.quirks = quirks
-		p.im = beforeHTMLIM
-		return true
-	}
-	p.quirks = true
-	p.im = beforeHTMLIM
-	return false
-}
-
-// Section 12.2.6.4.2.
-func beforeHTMLIM(p *parser) bool {
-	switch p.tok.Type {
-	case DoctypeToken:
-		// Ignore the token.
-		return true
-	case TextToken:
-		p.tok.Data = strings.TrimLeft(p.tok.Data, whitespace)
-		if len(p.tok.Data) == 0 {
-			// It was all whitespace, so ignore it.
-			return true
-		}
-	case StartTagToken:
-		if p.tok.DataAtom == a.Html {
-			p.addElement()
-			p.im = beforeHeadIM
-			return true
-		}
-	case EndTagToken:
-		switch p.tok.DataAtom {
-		case a.Head, a.Body, a.Html, a.Br:
-			p.parseImpliedToken(StartTagToken, a.Html, a.Html.String())
-			return false
-		default:
-			// Ignore the token.
-			return true
-		}
-	case CommentToken:
-		p.doc.AppendChild(&Node{
-			Type: CommentNode,
-			Data: p.tok.Data,
-		})
-		return true
-	}
-	p.parseImpliedToken(StartTagToken, a.Html, a.Html.String())
-	return false
-}
-
-// Section 12.2.6.4.3.
-func beforeHeadIM(p *parser) bool {
-	switch p.tok.Type {
-	case TextToken:
-		p.tok.Data = strings.TrimLeft(p.tok.Data, whitespace)
-		if len(p.tok.Data) == 0 {
-			// It was all whitespace, so ignore it.
-			return true
-		}
-	case StartTagToken:
-		switch p.tok.DataAtom {
-		case a.Head:
-			p.addElement()
-			p.head = p.top()
-			p.im = inHeadIM
-			return true
-		case a.Html:
-			return inBodyIM(p)
-		}
-	case EndTagToken:
-		switch p.tok.DataAtom {
-		case a.Head, a.Body, a.Html, a.Br:
-			p.parseImpliedToken(StartTagToken, a.Head, a.Head.String())
-			return false
-		default:
-			// Ignore the token.
-			return true
-		}
-	case CommentToken:
-		p.addChild(&Node{
-			Type: CommentNode,
-			Data: p.tok.Data,
-		})
-		return true
-	case DoctypeToken:
-		// Ignore the token.
-		return true
-	}
-
-	p.parseImpliedToken(StartTagToken, a.Head, a.Head.String())
-	return false
-}
-
-// Section 12.2.6.4.4.
-func inHeadIM(p *parser) bool {
-	switch p.tok.Type {
-	case TextToken:
-		s := strings.TrimLeft(p.tok.Data, whitespace)
-		if len(s) < len(p.tok.Data) {
-			// Add the initial whitespace to the current node.
-			p.addText(p.tok.Data[:len(p.tok.Data)-len(s)])
-			if s == "" {
-				return true
-			}
-			p.tok.Data = s
-		}
-	case StartTagToken:
-		switch p.tok.DataAtom {
-		case a.Html:
-			return inBodyIM(p)
-		case a.Base, a.Basefont, a.Bgsound, a.Link, a.Meta:
-			p.addElement()
-			p.oe.pop()
-			p.acknowledgeSelfClosingTag()
-			return true
-		case a.Noscript:
-			if p.scripting {
-				p.parseGenericRawTextElement()
-				return true
-			}
-			p.addElement()
-			p.im = inHeadNoscriptIM
-			// Don't let the tokenizer go into raw text mode when scripting is disabled.
-			p.tokenizer.NextIsNotRawText()
-			return true
-		case a.Script, a.Title:
-			p.addElement()
-			p.setOriginalIM()
-			p.im = textIM
-			return true
-		case a.Noframes, a.Style:
-			p.parseGenericRawTextElement()
-			return true
-		case a.Head:
-			// Ignore the token.
-			return true
-		case a.Template:
-			// TODO: remove this divergence from the HTML5 spec.
-			//
-			// We don't handle all of the corner cases when mixing foreign
-			// content (i.e. <math> or <svg>) with <template>. Without this
-			// early return, we can get into an infinite loop, possibly because
-			// of the "TODO... further divergence" a little below.
-			//
-			// As a workaround, if we are mixing foreign content and templates,
-			// just ignore the rest of the HTML. Foreign content is rare and a
-			// relatively old HTML feature. Templates are also rare and a
-			// relatively new HTML feature. Their combination is very rare.
-			for _, e := range p.oe {
-				if e.Namespace != "" {
-					p.im = ignoreTheRemainingTokens
-					return true
-				}
-			}
-
-			p.addElement()
-			p.afe = append(p.afe, &scopeMarker)
-			p.framesetOK = false
-			p.im = inTemplateIM
-			p.templateStack = append(p.templateStack, inTemplateIM)
-			return true
-		}
-	case EndTagToken:
-		switch p.tok.DataAtom {
-		case a.Head:
-			p.oe.pop()
-			p.im = afterHeadIM
-			return true
-		case a.Body, a.Html, a.Br:
-			p.parseImpliedToken(EndTagToken, a.Head, a.Head.String())
-			return false
-		case a.Template:
-			if !p.oe.contains(a.Template) {
-				return true
-			}
-			// TODO: remove this further divergence from the HTML5 spec.
-			//
-			// See https://bugs.chromium.org/p/chromium/issues/detail?id=829668
-			p.generateImpliedEndTags()
-			for i := len(p.oe) - 1; i >= 0; i-- {
-				if n := p.oe[i]; n.Namespace == "" && n.DataAtom == a.Template {
-					p.oe = p.oe[:i]
-					break
-				}
-			}
-			p.clearActiveFormattingElements()
-			p.templateStack.pop()
-			p.resetInsertionMode()
-			return true
-		default:
-			// Ignore the token.
-			return true
-		}
-	case CommentToken:
-		p.addChild(&Node{
-			Type: CommentNode,
-			Data: p.tok.Data,
-		})
-		return true
-	case DoctypeToken:
-		// Ignore the token.
-		return true
-	}
-
-	p.parseImpliedToken(EndTagToken, a.Head, a.Head.String())
-	return false
-}
-
-// Section 12.2.6.4.5.
-func inHeadNoscriptIM(p *parser) bool {
-	switch p.tok.Type {
-	case DoctypeToken:
-		// Ignore the token.
-		return true
-	case StartTagToken:
-		switch p.tok.DataAtom {
-		case a.Html:
-			return inBodyIM(p)
-		case a.Basefont, a.Bgsound, a.Link, a.Meta, a.Noframes, a.Style:
-			return inHeadIM(p)
-		case a.Head:
-			// Ignore the token.
-			return true
-		case a.Noscript:
-			// Don't let the tokenizer go into raw text mode even when a <noscript>
-			// tag is in "in head noscript" insertion mode.
-			p.tokenizer.NextIsNotRawText()
-			// Ignore the token.
-			return true
-		}
-	case EndTagToken:
-		switch p.tok.DataAtom {
-		case a.Noscript, a.Br:
-		default:
-			// Ignore the token.
-			return true
-		}
-	case TextToken:
-		s := strings.TrimLeft(p.tok.Data, whitespace)
-		if len(s) == 0 {
-			// It was all whitespace.
-			return inHeadIM(p)
-		}
-	case CommentToken:
-		return inHeadIM(p)
-	}
-	p.oe.pop()
-	if p.top().DataAtom != a.Head {
-		panic("html: the new current node will be a head element.")
-	}
-	p.im = inHeadIM
-	if p.tok.DataAtom == a.Noscript {
-		return true
-	}
-	return false
-}
-
-// Section 12.2.6.4.6.
-func afterHeadIM(p *parser) bool {
-	switch p.tok.Type {
-	case TextToken:
-		s := strings.TrimLeft(p.tok.Data, whitespace)
-		if len(s) < len(p.tok.Data) {
-			// Add the initial whitespace to the current node.
-			p.addText(p.tok.Data[:len(p.tok.Data)-len(s)])
-			if s == "" {
-				return true
-			}
-			p.tok.Data = s
-		}
-	case StartTagToken:
-		switch p.tok.DataAtom {
-		case a.Html:
-			return inBodyIM(p)
-		case a.Body:
-			p.addElement()
-			p.framesetOK = false
-			p.im = inBodyIM
-			return true
-		case a.Frameset:
-			p.addElement()
-			p.im = inFramesetIM
-			return true
-		case a.Base, a.Basefont, a.Bgsound, a.Link, a.Meta, a.Noframes, a.Script, a.Style, a.Template, a.Title:
-			p.oe = append(p.oe, p.head)
-			defer p.oe.remove(p.head)
-			return inHeadIM(p)
-		case a.Head:
-			// Ignore the token.
-			return true
-		}
-	case EndTagToken:
-		switch p.tok.DataAtom {
-		case a.Body, a.Html, a.Br:
-			// Drop down to creating an implied <body> tag.
-		case a.Template:
-			return inHeadIM(p)
-		default:
-			// Ignore the token.
-			return true
-		}
-	case CommentToken:
-		p.addChild(&Node{
-			Type: CommentNode,
-			Data: p.tok.Data,
-		})
-		return true
-	case DoctypeToken:
-		// Ignore the token.
-		return true
-	}
-
-	p.parseImpliedToken(StartTagToken, a.Body, a.Body.String())
-	p.framesetOK = true
-	if p.tok.Type == ErrorToken {
-		// Stop parsing.
-		return true
-	}
-	return false
-}
-
-// copyAttributes copies attributes of src not found on dst to dst.
-func copyAttributes(dst *Node, src Token) {
-	if len(src.Attr) == 0 {
-		return
-	}
-	attr := map[string]string{}
-	for _, t := range dst.Attr {
-		attr[t.Key] = t.Val
-	}
-	for _, t := range src.Attr {
-		if _, ok := attr[t.Key]; !ok {
-			dst.Attr = append(dst.Attr, t)
-			attr[t.Key] = t.Val
-		}
-	}
-}
-
-// Section 12.2.6.4.7.
-func inBodyIM(p *parser) bool {
-	switch p.tok.Type {
-	case TextToken:
-		d := p.tok.Data
-		switch n := p.oe.top(); n.DataAtom {
-		case a.Pre, a.Listing:
-			if n.FirstChild == nil {
-				// Ignore a newline at the start of a <pre> block.
-				if d != "" && d[0] == '\r' {
-					d = d[1:]
-				}
-				if d != "" && d[0] == '\n' {
-					d = d[1:]
-				}
-			}
-		}
-		d = strings.Replace(d, "\x00", "", -1)
-		if d == "" {
-			return true
-		}
-		p.reconstructActiveFormattingElements()
-		p.addText(d)
-		if p.framesetOK && strings.TrimLeft(d, whitespace) != "" {
-			// There were non-whitespace characters inserted.
-			p.framesetOK = false
-		}
-	case StartTagToken:
-		switch p.tok.DataAtom {
-		case a.Html:
-			if p.oe.contains(a.Template) {
-				return true
-			}
-			copyAttributes(p.oe[0], p.tok)
-		case a.Base, a.Basefont, a.Bgsound, a.Link, a.Meta, a.Noframes, a.Script, a.Style, a.Template, a.Title:
-			return inHeadIM(p)
-		case a.Body:
-			if p.oe.contains(a.Template) {
-				return true
-			}
-			if len(p.oe) >= 2 {
-				body := p.oe[1]
-				if body.Type == ElementNode && body.DataAtom == a.Body {
-					p.framesetOK = false
-					copyAttributes(body, p.tok)
-				}
-			}
-		case a.Frameset:
-			if !p.framesetOK || len(p.oe) < 2 || p.oe[1].DataAtom != a.Body {
-				// Ignore the token.
-				return true
-			}
-			body := p.oe[1]
-			if body.Parent != nil {
-				body.Parent.RemoveChild(body)
-			}
-			p.oe = p.oe[:1]
-			p.addElement()
-			p.im = inFramesetIM
-			return true
-		case a.Address, a.Article, a.Aside, a.Blockquote, a.Center, a.Details, a.Dialog, a.Dir, a.Div, a.Dl, a.Fieldset, a.Figcaption, a.Figure, a.Footer, a.Header, a.Hgroup, a.Main, a.Menu, a.Nav, a.Ol, a.P, a.Section, a.Summary, a.Ul:
-			p.popUntil(buttonScope, a.P)
-			p.addElement()
-		case a.H1, a.H2, a.H3, a.H4, a.H5, a.H6:
-			p.popUntil(buttonScope, a.P)
-			switch n := p.top(); n.DataAtom {
-			case a.H1, a.H2, a.H3, a.H4, a.H5, a.H6:
-				p.oe.pop()
-			}
-			p.addElement()
-		case a.Pre, a.Listing:
-			p.popUntil(buttonScope, a.P)
-			p.addElement()
-			// The newline, if any, will be dealt with by the TextToken case.
-			p.framesetOK = false
-		case a.Form:
-			if p.form != nil && !p.oe.contains(a.Template) {
-				// Ignore the token
-				return true
-			}
-			p.popUntil(buttonScope, a.P)
-			p.addElement()
-			if !p.oe.contains(a.Template) {
-				p.form = p.top()
-			}
-		case a.Li:
-			p.framesetOK = false
-			for i := len(p.oe) - 1; i >= 0; i-- {
-				node := p.oe[i]
-				switch node.DataAtom {
-				case a.Li:
-					p.oe = p.oe[:i]
-				case a.Address, a.Div, a.P:
-					continue
-				default:
-					if !isSpecialElement(node) {
-						continue
-					}
-				}
-				break
-			}
-			p.popUntil(buttonScope, a.P)
-			p.addElement()
-		case a.Dd, a.Dt:
-			p.framesetOK = false
-			for i := len(p.oe) - 1; i >= 0; i-- {
-				node := p.oe[i]
-				switch node.DataAtom {
-				case a.Dd, a.Dt:
-					p.oe = p.oe[:i]
-				case a.Address, a.Div, a.P:
-					continue
-				default:
-					if !isSpecialElement(node) {
-						continue
-					}
-				}
-				break
-			}
-			p.popUntil(buttonScope, a.P)
-			p.addElement()
-		case a.Plaintext:
-			p.popUntil(buttonScope, a.P)
-			p.addElement()
-		case a.Button:
-			p.popUntil(defaultScope, a.Button)
-			p.reconstructActiveFormattingElements()
-			p.addElement()
-			p.framesetOK = false
-		case a.A:
-			for i := len(p.afe) - 1; i >= 0 && p.afe[i].Type != scopeMarkerNode; i-- {
-				if n := p.afe[i]; n.Type == ElementNode && n.DataAtom == a.A {
-					p.inBodyEndTagFormatting(a.A, "a")
-					p.oe.remove(n)
-					p.afe.remove(n)
-					break
-				}
-			}
-			p.reconstructActiveFormattingElements()
-			p.addFormattingElement()
-		case a.B, a.Big, a.Code, a.Em, a.Font, a.I, a.S, a.Small, a.Strike, a.Strong, a.Tt, a.U:
-			p.reconstructActiveFormattingElements()
-			p.addFormattingElement()
-		case a.Nobr:
-			p.reconstructActiveFormattingElements()
-			if p.elementInScope(defaultScope, a.Nobr) {
-				p.inBodyEndTagFormatting(a.Nobr, "nobr")
-				p.reconstructActiveFormattingElements()
-			}
-			p.addFormattingElement()
-		case a.Applet, a.Marquee, a.Object:
-			p.reconstructActiveFormattingElements()
-			p.addElement()
-			p.afe = append(p.afe, &scopeMarker)
-			p.framesetOK = false
-		case a.Table:
-			if !p.quirks {
-				p.popUntil(buttonScope, a.P)
-			}
-			p.addElement()
-			p.framesetOK = false
-			p.im = inTableIM
-			return true
-		case a.Area, a.Br, a.Embed, a.Img, a.Input, a.Keygen, a.Wbr:
-			p.reconstructActiveFormattingElements()
-			p.addElement()
-			p.oe.pop()
-			p.acknowledgeSelfClosingTag()
-			if p.tok.DataAtom == a.Input {
-				for _, t := range p.tok.Attr {
-					if t.Key == "type" {
-						if strings.EqualFold(t.Val, "hidden") {
-							// Skip setting framesetOK = false
-							return true
-						}
-					}
-				}
-			}
-			p.framesetOK = false
-		case a.Param, a.Source, a.Track:
-			p.addElement()
-			p.oe.pop()
-			p.acknowledgeSelfClosingTag()
-		case a.Hr:
-			p.popUntil(buttonScope, a.P)
-			p.addElement()
-			p.oe.pop()
-			p.acknowledgeSelfClosingTag()
-			p.framesetOK = false
-		case a.Image:
-			p.tok.DataAtom = a.Img
-			p.tok.Data = a.Img.String()
-			return false
-		case a.Textarea:
-			p.addElement()
-			p.setOriginalIM()
-			p.framesetOK = false
-			p.im = textIM
-		case a.Xmp:
-			p.popUntil(buttonScope, a.P)
-			p.reconstructActiveFormattingElements()
-			p.framesetOK = false
-			p.parseGenericRawTextElement()
-		case a.Iframe:
-			p.framesetOK = false
-			p.parseGenericRawTextElement()
-		case a.Noembed:
-			p.parseGenericRawTextElement()
-		case a.Noscript:
-			if p.scripting {
-				p.parseGenericRawTextElement()
-				return true
-			}
-			p.reconstructActiveFormattingElements()
-			p.addElement()
-			// Don't let the tokenizer go into raw text mode when scripting is disabled.
-			p.tokenizer.NextIsNotRawText()
-		case a.Select:
-			p.reconstructActiveFormattingElements()
-			p.addElement()
-			p.framesetOK = false
-			p.im = inSelectIM
-			return true
-		case a.Optgroup, a.Option:
-			if p.top().DataAtom == a.Option {
-				p.oe.pop()
-			}
-			p.reconstructActiveFormattingElements()
-			p.addElement()
-		case a.Rb, a.Rtc:
-			if p.elementInScope(defaultScope, a.Ruby) {
-				p.generateImpliedEndTags()
-			}
-			p.addElement()
-		case a.Rp, a.Rt:
-			if p.elementInScope(defaultScope, a.Ruby) {
-				p.generateImpliedEndTags("rtc")
-			}
-			p.addElement()
-		case a.Math, a.Svg:
-			p.reconstructActiveFormattingElements()
-			if p.tok.DataAtom == a.Math {
-				adjustAttributeNames(p.tok.Attr, mathMLAttributeAdjustments)
-			} else {
-				adjustAttributeNames(p.tok.Attr, svgAttributeAdjustments)
-			}
-			adjustForeignAttributes(p.tok.Attr)
-			p.addElement()
-			p.top().Namespace = p.tok.Data
-			if p.hasSelfClosingToken {
-				p.oe.pop()
-				p.acknowledgeSelfClosingTag()
-			}
-			return true
-		case a.Caption, a.Col, a.Colgroup, a.Frame, a.Head, a.Tbody, a.Td, a.Tfoot, a.Th, a.Thead, a.Tr:
-			// Ignore the token.
-		default:
-			p.reconstructActiveFormattingElements()
-			p.addElement()
-		}
-	case EndTagToken:
-		switch p.tok.DataAtom {
-		case a.Body:
-			if p.elementInScope(defaultScope, a.Body) {
-				p.im = afterBodyIM
-			}
-		case a.Html:
-			if p.elementInScope(defaultScope, a.Body) {
-				p.parseImpliedToken(EndTagToken, a.Body, a.Body.String())
-				return false
-			}
-			return true
-		case a.Address, a.Article, a.Aside, a.Blockquote, a.Button, a.Center, a.Details, a.Dialog, a.Dir, a.Div, a.Dl, a.Fieldset, a.Figcaption, a.Figure, a.Footer, a.Header, a.Hgroup, a.Listing, a.Main, a.Menu, a.Nav, a.Ol, a.Pre, a.Section, a.Summary, a.Ul:
-			p.popUntil(defaultScope, p.tok.DataAtom)
-		case a.Form:
-			if p.oe.contains(a.Template) {
-				i := p.indexOfElementInScope(defaultScope, a.Form)
-				if i == -1 {
-					// Ignore the token.
-					return true
-				}
-				p.generateImpliedEndTags()
-				if p.oe[i].DataAtom != a.Form {
-					// Ignore the token.
-					return true
-				}
-				p.popUntil(defaultScope, a.Form)
-			} else {
-				node := p.form
-				p.form = nil
-				i := p.indexOfElementInScope(defaultScope, a.Form)
-				if node == nil || i == -1 || p.oe[i] != node {
-					// Ignore the token.
-					return true
-				}
-				p.generateImpliedEndTags()
-				p.oe.remove(node)
-			}
-		case a.P:
-			if !p.elementInScope(buttonScope, a.P) {
-				p.parseImpliedToken(StartTagToken, a.P, a.P.String())
-			}
-			p.popUntil(buttonScope, a.P)
-		case a.Li:
-			p.popUntil(listItemScope, a.Li)
-		case a.Dd, a.Dt:
-			p.popUntil(defaultScope, p.tok.DataAtom)
-		case a.H1, a.H2, a.H3, a.H4, a.H5, a.H6:
-			p.popUntil(defaultScope, a.H1, a.H2, a.H3, a.H4, a.H5, a.H6)
-		case a.A, a.B, a.Big, a.Code, a.Em, a.Font, a.I, a.Nobr, a.S, a.Small, a.Strike, a.Strong, a.Tt, a.U:
-			p.inBodyEndTagFormatting(p.tok.DataAtom, p.tok.Data)
-		case a.Applet, a.Marquee, a.Object:
-			if p.popUntil(defaultScope, p.tok.DataAtom) {
-				p.clearActiveFormattingElements()
-			}
-		case a.Br:
-			p.tok.Type = StartTagToken
-			return false
-		case a.Template:
-			return inHeadIM(p)
-		default:
-			p.inBodyEndTagOther(p.tok.DataAtom, p.tok.Data)
-		}
-	case CommentToken:
-		p.addChild(&Node{
-			Type: CommentNode,
-			Data: p.tok.Data,
-		})
-	case ErrorToken:
-		// TODO: remove this divergence from the HTML5 spec.
-		if len(p.templateStack) > 0 {
-			p.im = inTemplateIM
-			return false
-		}
-		for _, e := range p.oe {
-			switch e.DataAtom {
-			case a.Dd, a.Dt, a.Li, a.Optgroup, a.Option, a.P, a.Rb, a.Rp, a.Rt, a.Rtc, a.Tbody, a.Td, a.Tfoot, a.Th,
-				a.Thead, a.Tr, a.Body, a.Html:
-			default:
-				return true
-			}
-		}
-	}
-
-	return true
-}
-
-func (p *parser) inBodyEndTagFormatting(tagAtom a.Atom, tagName string) {
-	// This is the "adoption agency" algorithm, described at
-	// https://html.spec.whatwg.org/multipage/syntax.html#adoptionAgency
-
-	// TODO: this is a fairly literal line-by-line translation of that algorithm.
-	// Once the code successfully parses the comprehensive test suite, we should
-	// refactor this code to be more idiomatic.
-
-	// Steps 1-2
-	if current := p.oe.top(); current.Data == tagName && p.afe.index(current) == -1 {
-		p.oe.pop()
-		return
-	}
-
-	// Steps 3-5. The outer loop.
-	for i := 0; i < 8; i++ {
-		// Step 6. Find the formatting element.
-		var formattingElement *Node
-		for j := len(p.afe) - 1; j >= 0; j-- {
-			if p.afe[j].Type == scopeMarkerNode {
-				break
-			}
-			if p.afe[j].DataAtom == tagAtom {
-				formattingElement = p.afe[j]
-				break
-			}
-		}
-		if formattingElement == nil {
-			p.inBodyEndTagOther(tagAtom, tagName)
-			return
-		}
-
-		// Step 7. Ignore the tag if formatting element is not in the stack of open elements.
-		feIndex := p.oe.index(formattingElement)
-		if feIndex == -1 {
-			p.afe.remove(formattingElement)
-			return
-		}
-		// Step 8. Ignore the tag if formatting element is not in the scope.
-		if !p.elementInScope(defaultScope, tagAtom) {
-			// Ignore the tag.
-			return
-		}
-
-		// Step 9. This step is omitted because it's just a parse error but no need to return.
-
-		// Steps 10-11. Find the furthest block.
-		var furthestBlock *Node
-		for _, e := range p.oe[feIndex:] {
-			if isSpecialElement(e) {
-				furthestBlock = e
-				break
-			}
-		}
-		if furthestBlock == nil {
-			e := p.oe.pop()
-			for e != formattingElement {
-				e = p.oe.pop()
-			}
-			p.afe.remove(e)
-			return
-		}
-
-		// Steps 12-13. Find the common ancestor and bookmark node.
-		commonAncestor := p.oe[feIndex-1]
-		bookmark := p.afe.index(formattingElement)
-
-		// Step 14. The inner loop. Find the lastNode to reparent.
-		lastNode := furthestBlock
-		node := furthestBlock
-		x := p.oe.index(node)
-		// Step 14.1.
-		j := 0
-		for {
-			// Step 14.2.
-			j++
-			// Step. 14.3.
-			x--
-			node = p.oe[x]
-			// Step 14.4. Go to the next step if node is formatting element.
-			if node == formattingElement {
-				break
-			}
-			// Step 14.5. Remove node from the list of active formatting elements if
-			// inner loop counter is greater than three and node is in the list of
-			// active formatting elements.
-			if ni := p.afe.index(node); j > 3 && ni > -1 {
-				p.afe.remove(node)
-				// If any element of the list of active formatting elements is removed,
-				// we need to take care whether bookmark should be decremented or not.
-				// This is because the value of bookmark may exceed the size of the
-				// list by removing elements from the list.
-				if ni <= bookmark {
-					bookmark--
-				}
-				continue
-			}
-			// Step 14.6. Continue the next inner loop if node is not in the list of
-			// active formatting elements.
-			if p.afe.index(node) == -1 {
-				p.oe.remove(node)
-				continue
-			}
-			// Step 14.7.
-			clone := node.clone()
-			p.afe[p.afe.index(node)] = clone
-			p.oe[p.oe.index(node)] = clone
-			node = clone
-			// Step 14.8.
-			if lastNode == furthestBlock {
-				bookmark = p.afe.index(node) + 1
-			}
-			// Step 14.9.
-			if lastNode.Parent != nil {
-				lastNode.Parent.RemoveChild(lastNode)
-			}
-			node.AppendChild(lastNode)
-			// Step 14.10.
-			lastNode = node
-		}
-
-		// Step 15. Reparent lastNode to the common ancestor,
-		// or for misnested table nodes, to the foster parent.
-		if lastNode.Parent != nil {
-			lastNode.Parent.RemoveChild(lastNode)
-		}
-		switch commonAncestor.DataAtom {
-		case a.Table, a.Tbody, a.Tfoot, a.Thead, a.Tr:
-			p.fosterParent(lastNode)
-		default:
-			commonAncestor.AppendChild(lastNode)
-		}
-
-		// Steps 16-18. Reparent nodes from the furthest block's children
-		// to a clone of the formatting element.
-		clone := formattingElement.clone()
-		reparentChildren(clone, furthestBlock)
-		furthestBlock.AppendChild(clone)
-
-		// Step 19. Fix up the list of active formatting elements.
-		if oldLoc := p.afe.index(formattingElement); oldLoc != -1 && oldLoc < bookmark {
-			// Move the bookmark with the rest of the list.
-			bookmark--
-		}
-		p.afe.remove(formattingElement)
-		p.afe.insert(bookmark, clone)
-
-		// Step 20. Fix up the stack of open elements.
-		p.oe.remove(formattingElement)
-		p.oe.insert(p.oe.index(furthestBlock)+1, clone)
-	}
-}
-
-// inBodyEndTagOther performs the "any other end tag" algorithm for inBodyIM.
-// "Any other end tag" handling from 12.2.6.5 The rules for parsing tokens in foreign content
-// https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inforeign
-func (p *parser) inBodyEndTagOther(tagAtom a.Atom, tagName string) {
-	for i := len(p.oe) - 1; i >= 0; i-- {
-		// Two element nodes have the same tag if they have the same Data (a
-		// string-typed field). As an optimization, for common HTML tags, each
-		// Data string is assigned a unique, non-zero DataAtom (a uint32-typed
-		// field), since integer comparison is faster than string comparison.
-		// Uncommon (custom) tags get a zero DataAtom.
-		//
-		// The if condition here is equivalent to (p.oe[i].Data == tagName).
-		if (p.oe[i].DataAtom == tagAtom) &&
-			((tagAtom != 0) || (p.oe[i].Data == tagName)) {
-			p.oe = p.oe[:i]
-			break
-		}
-		if isSpecialElement(p.oe[i]) {
-			break
-		}
-	}
-}
-
-// Section 12.2.6.4.8.
-func textIM(p *parser) bool {
-	switch p.tok.Type {
-	case ErrorToken:
-		p.oe.pop()
-	case TextToken:
-		d := p.tok.Data
-		if n := p.oe.top(); n.DataAtom == a.Textarea && n.FirstChild == nil {
-			// Ignore a newline at the start of a <textarea> block.
-			if d != "" && d[0] == '\r' {
-				d = d[1:]
-			}
-			if d != "" && d[0] == '\n' {
-				d = d[1:]
-			}
-		}
-		if d == "" {
-			return true
-		}
-		p.addText(d)
-		return true
-	case EndTagToken:
-		p.oe.pop()
-	}
-	p.im = p.originalIM
-	p.originalIM = nil
-	return p.tok.Type == EndTagToken
-}
-
-// Section 12.2.6.4.9.
-func inTableIM(p *parser) bool {
-	switch p.tok.Type {
-	case TextToken:
-		p.tok.Data = strings.Replace(p.tok.Data, "\x00", "", -1)
-		switch p.oe.top().DataAtom {
-		case a.Table, a.Tbody, a.Tfoot, a.Thead, a.Tr:
-			if strings.Trim(p.tok.Data, whitespace) == "" {
-				p.addText(p.tok.Data)
-				return true
-			}
-		}
-	case StartTagToken:
-		switch p.tok.DataAtom {
-		case a.Caption:
-			p.clearStackToContext(tableScope)
-			p.afe = append(p.afe, &scopeMarker)
-			p.addElement()
-			p.im = inCaptionIM
-			return true
-		case a.Colgroup:
-			p.clearStackToContext(tableScope)
-			p.addElement()
-			p.im = inColumnGroupIM
-			return true
-		case a.Col:
-			p.parseImpliedToken(StartTagToken, a.Colgroup, a.Colgroup.String())
-			return false
-		case a.Tbody, a.Tfoot, a.Thead:
-			p.clearStackToContext(tableScope)
-			p.addElement()
-			p.im = inTableBodyIM
-			return true
-		case a.Td, a.Th, a.Tr:
-			p.parseImpliedToken(StartTagToken, a.Tbody, a.Tbody.String())
-			return false
-		case a.Table:
-			if p.popUntil(tableScope, a.Table) {
-				p.resetInsertionMode()
-				return false
-			}
-			// Ignore the token.
-			return true
-		case a.Style, a.Script, a.Template:
-			return inHeadIM(p)
-		case a.Input:
-			for _, t := range p.tok.Attr {
-				if t.Key == "type" && strings.EqualFold(t.Val, "hidden") {
-					p.addElement()
-					p.oe.pop()
-					return true
-				}
-			}
-			// Otherwise drop down to the default action.
-		case a.Form:
-			if p.oe.contains(a.Template) || p.form != nil {
-				// Ignore the token.
-				return true
-			}
-			p.addElement()
-			p.form = p.oe.pop()
-		case a.Select:
-			p.reconstructActiveFormattingElements()
-			switch p.top().DataAtom {
-			case a.Table, a.Tbody, a.Tfoot, a.Thead, a.Tr:
-				p.fosterParenting = true
-			}
-			p.addElement()
-			p.fosterParenting = false
-			p.framesetOK = false
-			p.im = inSelectInTableIM
-			return true
-		}
-	case EndTagToken:
-		switch p.tok.DataAtom {
-		case a.Table:
-			if p.popUntil(tableScope, a.Table) {
-				p.resetInsertionMode()
-				return true
-			}
-			// Ignore the token.
-			return true
-		case a.Body, a.Caption, a.Col, a.Colgroup, a.Html, a.Tbody, a.Td, a.Tfoot, a.Th, a.Thead, a.Tr:
-			// Ignore the token.
-			return true
-		case a.Template:
-			return inHeadIM(p)
-		}
-	case CommentToken:
-		p.addChild(&Node{
-			Type: CommentNode,
-			Data: p.tok.Data,
-		})
-		return true
-	case DoctypeToken:
-		// Ignore the token.
-		return true
-	case ErrorToken:
-		return inBodyIM(p)
-	}
-
-	p.fosterParenting = true
-	defer func() { p.fosterParenting = false }()
-
-	return inBodyIM(p)
-}
-
-// Section 12.2.6.4.11.
-func inCaptionIM(p *parser) bool {
-	switch p.tok.Type {
-	case StartTagToken:
-		switch p.tok.DataAtom {
-		case a.Caption, a.Col, a.Colgroup, a.Tbody, a.Td, a.Tfoot, a.Thead, a.Tr:
-			if !p.popUntil(tableScope, a.Caption) {
-				// Ignore the token.
-				return true
-			}
-			p.clearActiveFormattingElements()
-			p.im = inTableIM
-			return false
-		case a.Select:
-			p.reconstructActiveFormattingElements()
-			p.addElement()
-			p.framesetOK = false
-			p.im = inSelectInTableIM
-			return true
-		}
-	case EndTagToken:
-		switch p.tok.DataAtom {
-		case a.Caption:
-			if p.popUntil(tableScope, a.Caption) {
-				p.clearActiveFormattingElements()
-				p.im = inTableIM
-			}
-			return true
-		case a.Table:
-			if !p.popUntil(tableScope, a.Caption) {
-				// Ignore the token.
-				return true
-			}
-			p.clearActiveFormattingElements()
-			p.im = inTableIM
-			return false
-		case a.Body, a.Col, a.Colgroup, a.Html, a.Tbody, a.Td, a.Tfoot, a.Th, a.Thead, a.Tr:
-			// Ignore the token.
-			return true
-		}
-	}
-	return inBodyIM(p)
-}
-
-// Section 12.2.6.4.12.
-func inColumnGroupIM(p *parser) bool {
-	switch p.tok.Type {
-	case TextToken:
-		s := strings.TrimLeft(p.tok.Data, whitespace)
-		if len(s) < len(p.tok.Data) {
-			// Add the initial whitespace to the current node.
-			p.addText(p.tok.Data[:len(p.tok.Data)-len(s)])
-			if s == "" {
-				return true
-			}
-			p.tok.Data = s
-		}
-	case CommentToken:
-		p.addChild(&Node{
-			Type: CommentNode,
-			Data: p.tok.Data,
-		})
-		return true
-	case DoctypeToken:
-		// Ignore the token.
-		return true
-	case StartTagToken:
-		switch p.tok.DataAtom {
-		case a.Html:
-			return inBodyIM(p)
-		case a.Col:
-			p.addElement()
-			p.oe.pop()
-			p.acknowledgeSelfClosingTag()
-			return true
-		case a.Template:
-			return inHeadIM(p)
-		}
-	case EndTagToken:
-		switch p.tok.DataAtom {
-		case a.Colgroup:
-			if p.oe.top().DataAtom == a.Colgroup {
-				p.oe.pop()
-				p.im = inTableIM
-			}
-			return true
-		case a.Col:
-			// Ignore the token.
-			return true
-		case a.Template:
-			return inHeadIM(p)
-		}
-	case ErrorToken:
-		return inBodyIM(p)
-	}
-	if p.oe.top().DataAtom != a.Colgroup {
-		return true
-	}
-	p.oe.pop()
-	p.im = inTableIM
-	return false
-}
-
-// Section 12.2.6.4.13.
-func inTableBodyIM(p *parser) bool {
-	switch p.tok.Type {
-	case StartTagToken:
-		switch p.tok.DataAtom {
-		case a.Tr:
-			p.clearStackToContext(tableBodyScope)
-			p.addElement()
-			p.im = inRowIM
-			return true
-		case a.Td, a.Th:
-			p.parseImpliedToken(StartTagToken, a.Tr, a.Tr.String())
-			return false
-		case a.Caption, a.Col, a.Colgroup, a.Tbody, a.Tfoot, a.Thead:
-			if p.popUntil(tableScope, a.Tbody, a.Thead, a.Tfoot) {
-				p.im = inTableIM
-				return false
-			}
-			// Ignore the token.
-			return true
-		}
-	case EndTagToken:
-		switch p.tok.DataAtom {
-		case a.Tbody, a.Tfoot, a.Thead:
-			if p.elementInScope(tableScope, p.tok.DataAtom) {
-				p.clearStackToContext(tableBodyScope)
-				p.oe.pop()
-				p.im = inTableIM
-			}
-			return true
-		case a.Table:
-			if p.popUntil(tableScope, a.Tbody, a.Thead, a.Tfoot) {
-				p.im = inTableIM
-				return false
-			}
-			// Ignore the token.
-			return true
-		case a.Body, a.Caption, a.Col, a.Colgroup, a.Html, a.Td, a.Th, a.Tr:
-			// Ignore the token.
-			return true
-		}
-	case CommentToken:
-		p.addChild(&Node{
-			Type: CommentNode,
-			Data: p.tok.Data,
-		})
-		return true
-	}
-
-	return inTableIM(p)
-}
-
-// Section 12.2.6.4.14.
-func inRowIM(p *parser) bool {
-	switch p.tok.Type {
-	case StartTagToken:
-		switch p.tok.DataAtom {
-		case a.Td, a.Th:
-			p.clearStackToContext(tableRowScope)
-			p.addElement()
-			p.afe = append(p.afe, &scopeMarker)
-			p.im = inCellIM
-			return true
-		case a.Caption, a.Col, a.Colgroup, a.Tbody, a.Tfoot, a.Thead, a.Tr:
-			if p.popUntil(tableScope, a.Tr) {
-				p.im = inTableBodyIM
-				return false
-			}
-			// Ignore the token.
-			return true
-		}
-	case EndTagToken:
-		switch p.tok.DataAtom {
-		case a.Tr:
-			if p.popUntil(tableScope, a.Tr) {
-				p.im = inTableBodyIM
-				return true
-			}
-			// Ignore the token.
-			return true
-		case a.Table:
-			if p.popUntil(tableScope, a.Tr) {
-				p.im = inTableBodyIM
-				return false
-			}
-			// Ignore the token.
-			return true
-		case a.Tbody, a.Tfoot, a.Thead:
-			if p.elementInScope(tableScope, p.tok.DataAtom) {
-				p.parseImpliedToken(EndTagToken, a.Tr, a.Tr.String())
-				return false
-			}
-			// Ignore the token.
-			return true
-		case a.Body, a.Caption, a.Col, a.Colgroup, a.Html, a.Td, a.Th:
-			// Ignore the token.
-			return true
-		}
-	}
-
-	return inTableIM(p)
-}
-
-// Section 12.2.6.4.15.
-func inCellIM(p *parser) bool {
-	switch p.tok.Type {
-	case StartTagToken:
-		switch p.tok.DataAtom {
-		case a.Caption, a.Col, a.Colgroup, a.Tbody, a.Td, a.Tfoot, a.Th, a.Thead, a.Tr:
-			if p.popUntil(tableScope, a.Td, a.Th) {
-				// Close the cell and reprocess.
-				p.clearActiveFormattingElements()
-				p.im = inRowIM
-				return false
-			}
-			// Ignore the token.
-			return true
-		case a.Select:
-			p.reconstructActiveFormattingElements()
-			p.addElement()
-			p.framesetOK = false
-			p.im = inSelectInTableIM
-			return true
-		}
-	case EndTagToken:
-		switch p.tok.DataAtom {
-		case a.Td, a.Th:
-			if !p.popUntil(tableScope, p.tok.DataAtom) {
-				// Ignore the token.
-				return true
-			}
-			p.clearActiveFormattingElements()
-			p.im = inRowIM
-			return true
-		case a.Body, a.Caption, a.Col, a.Colgroup, a.Html:
-			// Ignore the token.
-			return true
-		case a.Table, a.Tbody, a.Tfoot, a.Thead, a.Tr:
-			if !p.elementInScope(tableScope, p.tok.DataAtom) {
-				// Ignore the token.
-				return true
-			}
-			// Close the cell and reprocess.
-			if p.popUntil(tableScope, a.Td, a.Th) {
-				p.clearActiveFormattingElements()
-			}
-			p.im = inRowIM
-			return false
-		}
-	}
-	return inBodyIM(p)
-}
-
-// Section 12.2.6.4.16.
-func inSelectIM(p *parser) bool {
-	switch p.tok.Type {
-	case TextToken:
-		p.addText(strings.Replace(p.tok.Data, "\x00", "", -1))
-	case StartTagToken:
-		switch p.tok.DataAtom {
-		case a.Html:
-			return inBodyIM(p)
-		case a.Option:
-			if p.top().DataAtom == a.Option {
-				p.oe.pop()
-			}
-			p.addElement()
-		case a.Optgroup:
-			if p.top().DataAtom == a.Option {
-				p.oe.pop()
-			}
-			if p.top().DataAtom == a.Optgroup {
-				p.oe.pop()
-			}
-			p.addElement()
-		case a.Select:
-			if !p.popUntil(selectScope, a.Select) {
-				// Ignore the token.
-				return true
-			}
-			p.resetInsertionMode()
-		case a.Input, a.Keygen, a.Textarea:
-			if p.elementInScope(selectScope, a.Select) {
-				p.parseImpliedToken(EndTagToken, a.Select, a.Select.String())
-				return false
-			}
-			// In order to properly ignore <textarea>, we need to change the tokenizer mode.
-			p.tokenizer.NextIsNotRawText()
-			// Ignore the token.
-			return true
-		case a.Script, a.Template:
-			return inHeadIM(p)
-		case a.Iframe, a.Noembed, a.Noframes, a.Noscript, a.Plaintext, a.Style, a.Title, a.Xmp:
-			// Don't let the tokenizer go into raw text mode when there are raw tags
-			// to be ignored. These tags should be ignored from the tokenizer
-			// properly.
-			p.tokenizer.NextIsNotRawText()
-			// Ignore the token.
-			return true
-		}
-	case EndTagToken:
-		switch p.tok.DataAtom {
-		case a.Option:
-			if p.top().DataAtom == a.Option {
-				p.oe.pop()
-			}
-		case a.Optgroup:
-			i := len(p.oe) - 1
-			if p.oe[i].DataAtom == a.Option {
-				i--
-			}
-			if p.oe[i].DataAtom == a.Optgroup {
-				p.oe = p.oe[:i]
-			}
-		case a.Select:
-			if !p.popUntil(selectScope, a.Select) {
-				// Ignore the token.
-				return true
-			}
-			p.resetInsertionMode()
-		case a.Template:
-			return inHeadIM(p)
-		}
-	case CommentToken:
-		p.addChild(&Node{
-			Type: CommentNode,
-			Data: p.tok.Data,
-		})
-	case DoctypeToken:
-		// Ignore the token.
-		return true
-	case ErrorToken:
-		return inBodyIM(p)
-	}
-
-	return true
-}
-
-// Section 12.2.6.4.17.
-func inSelectInTableIM(p *parser) bool {
-	switch p.tok.Type {
-	case StartTagToken, EndTagToken:
-		switch p.tok.DataAtom {
-		case a.Caption, a.Table, a.Tbody, a.Tfoot, a.Thead, a.Tr, a.Td, a.Th:
-			if p.tok.Type == EndTagToken && !p.elementInScope(tableScope, p.tok.DataAtom) {
-				// Ignore the token.
-				return true
-			}
-			// This is like p.popUntil(selectScope, a.Select), but it also
-			// matches <math select>, not just <select>. Matching the MathML
-			// tag is arguably incorrect (conceptually), but it mimics what
-			// Chromium does.
-			for i := len(p.oe) - 1; i >= 0; i-- {
-				if n := p.oe[i]; n.DataAtom == a.Select {
-					p.oe = p.oe[:i]
-					break
-				}
-			}
-			p.resetInsertionMode()
-			return false
-		}
-	}
-	return inSelectIM(p)
-}
-
-// Section 12.2.6.4.18.
-func inTemplateIM(p *parser) bool {
-	switch p.tok.Type {
-	case TextToken, CommentToken, DoctypeToken:
-		return inBodyIM(p)
-	case StartTagToken:
-		switch p.tok.DataAtom {
-		case a.Base, a.Basefont, a.Bgsound, a.Link, a.Meta, a.Noframes, a.Script, a.Style, a.Template, a.Title:
-			return inHeadIM(p)
-		case a.Caption, a.Colgroup, a.Tbody, a.Tfoot, a.Thead:
-			p.templateStack.pop()
-			p.templateStack = append(p.templateStack, inTableIM)
-			p.im = inTableIM
-			return false
-		case a.Col:
-			p.templateStack.pop()
-			p.templateStack = append(p.templateStack, inColumnGroupIM)
-			p.im = inColumnGroupIM
-			return false
-		case a.Tr:
-			p.templateStack.pop()
-			p.templateStack = append(p.templateStack, inTableBodyIM)
-			p.im = inTableBodyIM
-			return false
-		case a.Td, a.Th:
-			p.templateStack.pop()
-			p.templateStack = append(p.templateStack, inRowIM)
-			p.im = inRowIM
-			return false
-		default:
-			p.templateStack.pop()
-			p.templateStack = append(p.templateStack, inBodyIM)
-			p.im = inBodyIM
-			return false
-		}
-	case EndTagToken:
-		switch p.tok.DataAtom {
-		case a.Template:
-			return inHeadIM(p)
-		default:
-			// Ignore the token.
-			return true
-		}
-	case ErrorToken:
-		if !p.oe.contains(a.Template) {
-			// Ignore the token.
-			return true
-		}
-		// TODO: remove this divergence from the HTML5 spec.
-		//
-		// See https://bugs.chromium.org/p/chromium/issues/detail?id=829668
-		p.generateImpliedEndTags()
-		for i := len(p.oe) - 1; i >= 0; i-- {
-			if n := p.oe[i]; n.Namespace == "" && n.DataAtom == a.Template {
-				p.oe = p.oe[:i]
-				break
-			}
-		}
-		p.clearActiveFormattingElements()
-		p.templateStack.pop()
-		p.resetInsertionMode()
-		return false
-	}
-	return false
-}
-
-// Section 12.2.6.4.19.
-func afterBodyIM(p *parser) bool {
-	switch p.tok.Type {
-	case ErrorToken:
-		// Stop parsing.
-		return true
-	case TextToken:
-		s := strings.TrimLeft(p.tok.Data, whitespace)
-		if len(s) == 0 {
-			// It was all whitespace.
-			return inBodyIM(p)
-		}
-	case StartTagToken:
-		if p.tok.DataAtom == a.Html {
-			return inBodyIM(p)
-		}
-	case EndTagToken:
-		if p.tok.DataAtom == a.Html {
-			if !p.fragment {
-				p.im = afterAfterBodyIM
-			}
-			return true
-		}
-	case CommentToken:
-		// The comment is attached to the <html> element.
-		if len(p.oe) < 1 || p.oe[0].DataAtom != a.Html {
-			panic("html: bad parser state: <html> element not found, in the after-body insertion mode")
-		}
-		p.oe[0].AppendChild(&Node{
-			Type: CommentNode,
-			Data: p.tok.Data,
-		})
-		return true
-	}
-	p.im = inBodyIM
-	return false
-}
-
-// Section 12.2.6.4.20.
-func inFramesetIM(p *parser) bool {
-	switch p.tok.Type {
-	case CommentToken:
-		p.addChild(&Node{
-			Type: CommentNode,
-			Data: p.tok.Data,
-		})
-	case TextToken:
-		// Ignore all text but whitespace.
-		s := strings.Map(func(c rune) rune {
-			switch c {
-			case ' ', '\t', '\n', '\f', '\r':
-				return c
-			}
-			return -1
-		}, p.tok.Data)
-		if s != "" {
-			p.addText(s)
-		}
-	case StartTagToken:
-		switch p.tok.DataAtom {
-		case a.Html:
-			return inBodyIM(p)
-		case a.Frameset:
-			p.addElement()
-		case a.Frame:
-			p.addElement()
-			p.oe.pop()
-			p.acknowledgeSelfClosingTag()
-		case a.Noframes:
-			return inHeadIM(p)
-		}
-	case EndTagToken:
-		switch p.tok.DataAtom {
-		case a.Frameset:
-			if p.oe.top().DataAtom != a.Html {
-				p.oe.pop()
-				if p.oe.top().DataAtom != a.Frameset {
-					p.im = afterFramesetIM
-					return true
-				}
-			}
-		}
-	default:
-		// Ignore the token.
-	}
-	return true
-}
-
-// Section 12.2.6.4.21.
-func afterFramesetIM(p *parser) bool {
-	switch p.tok.Type {
-	case CommentToken:
-		p.addChild(&Node{
-			Type: CommentNode,
-			Data: p.tok.Data,
-		})
-	case TextToken:
-		// Ignore all text but whitespace.
-		s := strings.Map(func(c rune) rune {
-			switch c {
-			case ' ', '\t', '\n', '\f', '\r':
-				return c
-			}
-			return -1
-		}, p.tok.Data)
-		if s != "" {
-			p.addText(s)
-		}
-	case StartTagToken:
-		switch p.tok.DataAtom {
-		case a.Html:
-			return inBodyIM(p)
-		case a.Noframes:
-			return inHeadIM(p)
-		}
-	case EndTagToken:
-		switch p.tok.DataAtom {
-		case a.Html:
-			p.im = afterAfterFramesetIM
-			return true
-		}
-	default:
-		// Ignore the token.
-	}
-	return true
-}
-
-// Section 12.2.6.4.22.
-func afterAfterBodyIM(p *parser) bool {
-	switch p.tok.Type {
-	case ErrorToken:
-		// Stop parsing.
-		return true
-	case TextToken:
-		s := strings.TrimLeft(p.tok.Data, whitespace)
-		if len(s) == 0 {
-			// It was all whitespace.
-			return inBodyIM(p)
-		}
-	case StartTagToken:
-		if p.tok.DataAtom == a.Html {
-			return inBodyIM(p)
-		}
-	case CommentToken:
-		p.doc.AppendChild(&Node{
-			Type: CommentNode,
-			Data: p.tok.Data,
-		})
-		return true
-	case DoctypeToken:
-		return inBodyIM(p)
-	}
-	p.im = inBodyIM
-	return false
-}
-
-// Section 12.2.6.4.23.
-func afterAfterFramesetIM(p *parser) bool {
-	switch p.tok.Type {
-	case CommentToken:
-		p.doc.AppendChild(&Node{
-			Type: CommentNode,
-			Data: p.tok.Data,
-		})
-	case TextToken:
-		// Ignore all text but whitespace.
-		s := strings.Map(func(c rune) rune {
-			switch c {
-			case ' ', '\t', '\n', '\f', '\r':
-				return c
-			}
-			return -1
-		}, p.tok.Data)
-		if s != "" {
-			p.tok.Data = s
-			return inBodyIM(p)
-		}
-	case StartTagToken:
-		switch p.tok.DataAtom {
-		case a.Html:
-			return inBodyIM(p)
-		case a.Noframes:
-			return inHeadIM(p)
-		}
-	case DoctypeToken:
-		return inBodyIM(p)
-	default:
-		// Ignore the token.
-	}
-	return true
-}
-
-func ignoreTheRemainingTokens(p *parser) bool {
-	return true
-}
-
-const whitespaceOrNUL = whitespace + "\x00"
-
-// Section 12.2.6.5
-func parseForeignContent(p *parser) bool {
-	switch p.tok.Type {
-	case TextToken:
-		if p.framesetOK {
-			p.framesetOK = strings.TrimLeft(p.tok.Data, whitespaceOrNUL) == ""
-		}
-		p.tok.Data = strings.Replace(p.tok.Data, "\x00", "\ufffd", -1)
-		p.addText(p.tok.Data)
-	case CommentToken:
-		p.addChild(&Node{
-			Type: CommentNode,
-			Data: p.tok.Data,
-		})
-	case StartTagToken:
-		if !p.fragment {
-			b := breakout[p.tok.Data]
-			if p.tok.DataAtom == a.Font {
-			loop:
-				for _, attr := range p.tok.Attr {
-					switch attr.Key {
-					case "color", "face", "size":
-						b = true
-						break loop
-					}
-				}
-			}
-			if b {
-				for i := len(p.oe) - 1; i >= 0; i-- {
-					n := p.oe[i]
-					if n.Namespace == "" || htmlIntegrationPoint(n) || mathMLTextIntegrationPoint(n) {
-						p.oe = p.oe[:i+1]
-						break
-					}
-				}
-				return false
-			}
-		}
-		current := p.adjustedCurrentNode()
-		switch current.Namespace {
-		case "math":
-			adjustAttributeNames(p.tok.Attr, mathMLAttributeAdjustments)
-		case "svg":
-			// Adjust SVG tag names. The tokenizer lower-cases tag names, but
-			// SVG wants e.g. "foreignObject" with a capital second "O".
-			if x := svgTagNameAdjustments[p.tok.Data]; x != "" {
-				p.tok.DataAtom = a.Lookup([]byte(x))
-				p.tok.Data = x
-			}
-			adjustAttributeNames(p.tok.Attr, svgAttributeAdjustments)
-		default:
-			panic("html: bad parser state: unexpected namespace")
-		}
-		adjustForeignAttributes(p.tok.Attr)
-		namespace := current.Namespace
-		p.addElement()
-		p.top().Namespace = namespace
-		if namespace != "" {
-			// Don't let the tokenizer go into raw text mode in foreign content
-			// (e.g. in an SVG <title> tag).
-			p.tokenizer.NextIsNotRawText()
-		}
-		if p.hasSelfClosingToken {
-			p.oe.pop()
-			p.acknowledgeSelfClosingTag()
-		}
-	case EndTagToken:
-		for i := len(p.oe) - 1; i >= 0; i-- {
-			if p.oe[i].Namespace == "" {
-				return p.im(p)
-			}
-			if strings.EqualFold(p.oe[i].Data, p.tok.Data) {
-				p.oe = p.oe[:i]
-				break
-			}
-		}
-		return true
-	default:
-		// Ignore the token.
-	}
-	return true
-}
-
-// Section 12.2.4.2.
-func (p *parser) adjustedCurrentNode() *Node {
-	if len(p.oe) == 1 && p.fragment && p.context != nil {
-		return p.context
-	}
-	return p.oe.top()
-}
-
-// Section 12.2.6.
-func (p *parser) inForeignContent() bool {
-	if len(p.oe) == 0 {
-		return false
-	}
-	n := p.adjustedCurrentNode()
-	if n.Namespace == "" {
-		return false
-	}
-	if mathMLTextIntegrationPoint(n) {
-		if p.tok.Type == StartTagToken && p.tok.DataAtom != a.Mglyph && p.tok.DataAtom != a.Malignmark {
-			return false
-		}
-		if p.tok.Type == TextToken {
-			return false
-		}
-	}
-	if n.Namespace == "math" && n.DataAtom == a.AnnotationXml && p.tok.Type == StartTagToken && p.tok.DataAtom == a.Svg {
-		return false
-	}
-	if htmlIntegrationPoint(n) && (p.tok.Type == StartTagToken || p.tok.Type == TextToken) {
-		return false
-	}
-	if p.tok.Type == ErrorToken {
-		return false
-	}
-	return true
-}
-
-// parseImpliedToken parses a token as though it had appeared in the parser's
-// input.
-func (p *parser) parseImpliedToken(t TokenType, dataAtom a.Atom, data string) {
-	realToken, selfClosing := p.tok, p.hasSelfClosingToken
-	p.tok = Token{
-		Type:     t,
-		DataAtom: dataAtom,
-		Data:     data,
-	}
-	p.hasSelfClosingToken = false
-	p.parseCurrentToken()
-	p.tok, p.hasSelfClosingToken = realToken, selfClosing
-}
-
-// parseCurrentToken runs the current token through the parsing routines
-// until it is consumed.
-func (p *parser) parseCurrentToken() {
-	if p.tok.Type == SelfClosingTagToken {
-		p.hasSelfClosingToken = true
-		p.tok.Type = StartTagToken
-	}
-
-	consumed := false
-	for !consumed {
-		if p.inForeignContent() {
-			consumed = parseForeignContent(p)
-		} else {
-			consumed = p.im(p)
-		}
-	}
-
-	if p.hasSelfClosingToken {
-		// This is a parse error, but ignore it.
-		p.hasSelfClosingToken = false
-	}
-}
-
-func (p *parser) parse() error {
-	// Iterate until EOF. Any other error will cause an early return.
-	var err error
-	for err != io.EOF {
-		// CDATA sections are allowed only in foreign content.
-		n := p.oe.top()
-		p.tokenizer.AllowCDATA(n != nil && n.Namespace != "")
-		// Read and parse the next token.
-		p.tokenizer.Next()
-		p.tok = p.tokenizer.Token()
-		if p.tok.Type == ErrorToken {
-			err = p.tokenizer.Err()
-			if err != nil && err != io.EOF {
-				return err
-			}
-		}
-		p.parseCurrentToken()
-	}
-	return nil
-}
-
-// Parse returns the parse tree for the HTML from the given Reader.
-//
-// It implements the HTML5 parsing algorithm
-// (https://html.spec.whatwg.org/multipage/syntax.html#tree-construction),
-// which is very complicated. The resultant tree can contain implicitly created
-// nodes that have no explicit <tag> listed in r's data, and nodes' parents can
-// differ from the nesting implied by a naive processing of start and end
-// <tag>s. Conversely, explicit <tag>s in r's data can be silently dropped,
-// with no corresponding node in the resulting tree.
-//
-// The input is assumed to be UTF-8 encoded.
-func Parse(r io.Reader) (*Node, error) {
-	return ParseWithOptions(r)
-}
-
-// ParseFragment parses a fragment of HTML and returns the nodes that were
-// found. If the fragment is the InnerHTML for an existing element, pass that
-// element in context.
-//
-// It has the same intricacies as Parse.
-func ParseFragment(r io.Reader, context *Node) ([]*Node, error) {
-	return ParseFragmentWithOptions(r, context)
-}
-
-// ParseOption configures a parser.
-type ParseOption func(p *parser)
-
-// ParseOptionEnableScripting configures the scripting flag.
-// https://html.spec.whatwg.org/multipage/webappapis.html#enabling-and-disabling-scripting
-//
-// By default, scripting is enabled.
-func ParseOptionEnableScripting(enable bool) ParseOption {
-	return func(p *parser) {
-		p.scripting = enable
-	}
-}
-
-// ParseWithOptions is like Parse, with options.
-func ParseWithOptions(r io.Reader, opts ...ParseOption) (*Node, error) {
-	p := &parser{
-		tokenizer: NewTokenizer(r),
-		doc: &Node{
-			Type: DocumentNode,
-		},
-		scripting:  true,
-		framesetOK: true,
-		im:         initialIM,
-	}
-
-	for _, f := range opts {
-		f(p)
-	}
-
-	if err := p.parse(); err != nil {
-		return nil, err
-	}
-	return p.doc, nil
-}
-
-// ParseFragmentWithOptions is like ParseFragment, with options.
-func ParseFragmentWithOptions(r io.Reader, context *Node, opts ...ParseOption) ([]*Node, error) {
-	contextTag := ""
-	if context != nil {
-		if context.Type != ElementNode {
-			return nil, errors.New("html: ParseFragment of non-element Node")
-		}
-		// The next check isn't just context.DataAtom.String() == context.Data because
-		// it is valid to pass an element whose tag isn't a known atom. For example,
-		// DataAtom == 0 and Data = "tagfromthefuture" is perfectly consistent.
-		if context.DataAtom != a.Lookup([]byte(context.Data)) {
-			return nil, fmt.Errorf("html: inconsistent Node: DataAtom=%q, Data=%q", context.DataAtom, context.Data)
-		}
-		contextTag = context.DataAtom.String()
-	}
-	p := &parser{
-		doc: &Node{
-			Type: DocumentNode,
-		},
-		scripting: true,
-		fragment:  true,
-		context:   context,
-	}
-	if context != nil && context.Namespace != "" {
-		p.tokenizer = NewTokenizer(r)
-	} else {
-		p.tokenizer = NewTokenizerFragment(r, contextTag)
-	}
-
-	for _, f := range opts {
-		f(p)
-	}
-
-	root := &Node{
-		Type:     ElementNode,
-		DataAtom: a.Html,
-		Data:     a.Html.String(),
-	}
-	p.doc.AppendChild(root)
-	p.oe = nodeStack{root}
-	if context != nil && context.DataAtom == a.Template {
-		p.templateStack = append(p.templateStack, inTemplateIM)
-	}
-	p.resetInsertionMode()
-
-	for n := context; n != nil; n = n.Parent {
-		if n.Type == ElementNode && n.DataAtom == a.Form {
-			p.form = n
-			break
-		}
-	}
-
-	if err := p.parse(); err != nil {
-		return nil, err
-	}
-
-	parent := p.doc
-	if context != nil {
-		parent = root
-	}
-
-	var result []*Node
-	for c := parent.FirstChild; c != nil; {
-		next := c.NextSibling
-		parent.RemoveChild(c)
-		result = append(result, c)
-		c = next
-	}
-	return result, nil
-}
-- 
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