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// Copyright 2015 The 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 markdown
import "regexp"
var (
attrName = `[a-zA-Z_:][a-zA-Z0-9:._-]*`
unquoted = "[^\"'=<>`\\x00-\\x20]+"
singleQuoted = `'[^']*'`
doubleQuoted = `"[^"]*"`
attrValue = `(?:` + unquoted + `|` + singleQuoted + `|` + doubleQuoted + `)`
attribute = `(?:\s+` + attrName + `(?:\s*=\s*` + attrValue + `)?)`
openTag = `<[A-Za-z][A-Za-z0-9-]*` + attribute + `*\s*/?>`
closeTag = `</[A-Za-z][A-Za-z0-9-]*\s*>`
comment = `<!---->|<!--(?:-?[^>-])(?:-?[^-])*-->`
processing = `<[?].*?[?]>`
declaration = `<![A-Z]+\s+[^>]*>`
cdata = `<!\[CDATA\[[\s\S]*?\]\]>`
rHTMLTag = regexp.MustCompile(`^(?:` + openTag + `|` + closeTag + `|` + comment +
`|` + processing + `|` + declaration + `|` + cdata + `)`)
)
func htmlSecond(b byte) bool {
return b == '!' || b == '/' || b == '?' || isLetter(b)
}
func ruleHTMLInline(s *StateInline, silent bool) bool {
if !s.Md.HTML {
return false
}
pos := s.Pos
src := s.Src
if pos+2 >= s.PosMax || src[pos] != '<' {
return false
}
if !htmlSecond(src[pos+1]) {
return false
}
match := rHTMLTag.FindString(src[pos:])
if match == "" {
return false
}
if !silent {
s.PushToken(&HTMLInline{Content: match})
}
s.Pos += len(match)
return true
}
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