source: code/trunk/vendor/github.com/alecthomas/chroma/v2/lexers/html.go@ 67

package lexers

import (
        . "github.com/alecthomas/chroma/v2" // nolint
)

// HTML lexer.
var HTML = Register(MustNewLexer(
        &Config{
                Name:            "HTML",
                Aliases:         []string{"html"},
                Filenames:       []string{"*.html", "*.htm", "*.xhtml", "*.xslt"},
                MimeTypes:       []string{"text/html", "application/xhtml+xml"},
                NotMultiline:    true,
                DotAll:          true,
                CaseInsensitive: true,
        },
        htmlRules,
))

func htmlRules() Rules {
        return Rules{
                "root": {
                        {`[^<&]+`, Text, nil},
                        {`&\S*?;`, NameEntity, nil},
                        {`\<\!\[CDATA\[.*?\]\]\>`, CommentPreproc, nil},
                        {`<!--`, Comment, Push("comment")},
                        {`<\?.*?\?>`, CommentPreproc, nil},
                        {`<![^>]*>`, CommentPreproc, nil},
                        {`(<)(\s*)(script)(\s*)`, ByGroups(Punctuation, Text, NameTag, Text), Push("script-content", "tag")},
                        {`(<)(\s*)(style)(\s*)`, ByGroups(Punctuation, Text, NameTag, Text), Push("style-content", "tag")},
                        {`(<)(\s*)([\w:.-]+)`, ByGroups(Punctuation, Text, NameTag), Push("tag")},
                        {`(<)(\s*)(/)(\s*)([\w:.-]+)(\s*)(>)`, ByGroups(Punctuation, Text, Punctuation, Text, NameTag, Text, Punctuation), nil},
                },
                "comment": {
                        {`[^-]+`, Comment, nil},
                        {`-->`, Comment, Pop(1)},
                        {`-`, Comment, nil},
                },
                "tag": {
                        {`\s+`, Text, nil},
                        {`([\w:-]+\s*)(=)(\s*)`, ByGroups(NameAttribute, Operator, Text), Push("attr")},
                        {`[\w:-]+`, NameAttribute, nil},
                        {`(/?)(\s*)(>)`, ByGroups(Punctuation, Text, Punctuation), Pop(1)},
                },
                "script-content": {
                        {`(<)(\s*)(/)(\s*)(script)(\s*)(>)`, ByGroups(Punctuation, Text, Punctuation, Text, NameTag, Text, Punctuation), Pop(1)},
                        {`.+?(?=<\s*/\s*script\s*>)`, Using("Javascript"), nil},
                },
                "style-content": {
                        {`(<)(\s*)(/)(\s*)(style)(\s*)(>)`, ByGroups(Punctuation, Text, Punctuation, Text, NameTag, Text, Punctuation), Pop(1)},
                        {`.+?(?=<\s*/\s*style\s*>)`, Using("CSS"), nil},
                },
                "attr": {
                        {`".*?"`, LiteralString, Pop(1)},
                        {`'.*?'`, LiteralString, Pop(1)},
                        {`[^\s>]+`, LiteralString, Pop(1)},
                },
        }
}