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@@ -901,7 +901,7 @@ func inBodyIM(p *parser) bool {
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case a.A:
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for i := len(p.afe) - 1; i >= 0 && p.afe[i].Type != scopeMarkerNode; i-- {
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if n := p.afe[i]; n.Type == ElementNode && n.DataAtom == a.A {
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- p.inBodyEndTagFormatting(a.A)
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+ p.inBodyEndTagFormatting(a.A, "a")
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p.oe.remove(n)
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p.afe.remove(n)
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break
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@@ -915,7 +915,7 @@ func inBodyIM(p *parser) bool {
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case a.Nobr:
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p.reconstructActiveFormattingElements()
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if p.elementInScope(defaultScope, a.Nobr) {
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- p.inBodyEndTagFormatting(a.Nobr)
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+ p.inBodyEndTagFormatting(a.Nobr, "nobr")
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p.reconstructActiveFormattingElements()
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}
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p.addFormattingElement()
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@@ -1123,7 +1123,7 @@ func inBodyIM(p *parser) bool {
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case a.H1, a.H2, a.H3, a.H4, a.H5, a.H6:
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p.popUntil(defaultScope, a.H1, a.H2, a.H3, a.H4, a.H5, a.H6)
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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:
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- p.inBodyEndTagFormatting(p.tok.DataAtom)
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+ p.inBodyEndTagFormatting(p.tok.DataAtom, p.tok.Data)
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case a.Applet, a.Marquee, a.Object:
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if p.popUntil(defaultScope, p.tok.DataAtom) {
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p.clearActiveFormattingElements()
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@@ -1134,7 +1134,7 @@ func inBodyIM(p *parser) bool {
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case a.Template:
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return inHeadIM(p)
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default:
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- p.inBodyEndTagOther(p.tok.DataAtom)
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+ p.inBodyEndTagOther(p.tok.DataAtom, p.tok.Data)
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}
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case CommentToken:
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p.addChild(&Node{
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@@ -1161,7 +1161,7 @@ func inBodyIM(p *parser) bool {
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return true
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}
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-func (p *parser) inBodyEndTagFormatting(tagAtom a.Atom) {
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+func (p *parser) inBodyEndTagFormatting(tagAtom a.Atom, tagName string) {
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// This is the "adoption agency" algorithm, described at
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// https://html.spec.whatwg.org/multipage/syntax.html#adoptionAgency
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@@ -1183,7 +1183,7 @@ func (p *parser) inBodyEndTagFormatting(tagAtom a.Atom) {
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}
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}
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if formattingElement == nil {
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- p.inBodyEndTagOther(tagAtom)
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+ p.inBodyEndTagOther(tagAtom, tagName)
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return
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}
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feIndex := p.oe.index(formattingElement)
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@@ -1288,9 +1288,17 @@ func (p *parser) inBodyEndTagFormatting(tagAtom a.Atom) {
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// inBodyEndTagOther performs the "any other end tag" algorithm for inBodyIM.
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// "Any other end tag" handling from 12.2.6.5 The rules for parsing tokens in foreign content
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// https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inforeign
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-func (p *parser) inBodyEndTagOther(tagAtom a.Atom) {
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+func (p *parser) inBodyEndTagOther(tagAtom a.Atom, tagName string) {
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for i := len(p.oe) - 1; i >= 0; i-- {
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- if p.oe[i].DataAtom == tagAtom {
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+ // Two element nodes have the same tag if they have the same Data (a
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+ // string-typed field). As an optimization, for common HTML tags, each
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+ // Data string is assigned a unique, non-zero DataAtom (a uint32-typed
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+ // field), since integer comparison is faster than string comparison.
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+ // Uncommon (custom) tags get a zero DataAtom.
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+ //
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+ // The if condition here is equivalent to (p.oe[i].Data == tagName).
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+ if (p.oe[i].DataAtom == tagAtom) &&
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+ ((tagAtom != 0) || (p.oe[i].Data == tagName)) {
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p.oe = p.oe[:i]
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break
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}
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Tom Anthony