forked from jshiffer/matterbridge
58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
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// Copyright 2015 The Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package markdown
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import "regexp"
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var (
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attrName = `[a-zA-Z_:][a-zA-Z0-9:._-]*`
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unquoted = "[^\"'=<>`\\x00-\\x20]+"
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singleQuoted = `'[^']*'`
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doubleQuoted = `"[^"]*"`
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attrValue = `(?:` + unquoted + `|` + singleQuoted + `|` + doubleQuoted + `)`
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attribute = `(?:\s+` + attrName + `(?:\s*=\s*` + attrValue + `)?)`
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openTag = `<[A-Za-z][A-Za-z0-9-]*` + attribute + `*\s*/?>`
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closeTag = `</[A-Za-z][A-Za-z0-9-]*\s*>`
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comment = `<!---->|<!--(?:-?[^>-])(?:-?[^-])*-->`
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processing = `<[?].*?[?]>`
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declaration = `<![A-Z]+\s+[^>]*>`
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cdata = `<!\[CDATA\[[\s\S]*?\]\]>`
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rHTMLTag = regexp.MustCompile(`^(?:` + openTag + `|` + closeTag + `|` + comment +
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`|` + processing + `|` + declaration + `|` + cdata + `)`)
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)
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func htmlSecond(b byte) bool {
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return b == '!' || b == '/' || b == '?' || isLetter(b)
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}
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func ruleHTMLInline(s *StateInline, silent bool) bool {
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if !s.Md.HTML {
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return false
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}
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pos := s.Pos
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src := s.Src
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if pos+2 >= s.PosMax || src[pos] != '<' {
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return false
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}
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if !htmlSecond(src[pos+1]) {
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return false
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}
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match := rHTMLTag.FindString(src[pos:])
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if match == "" {
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return false
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}
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if !silent {
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s.PushToken(&HTMLInline{Content: match})
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}
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s.Pos += len(match)
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return true
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}
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