mirror of
https://github.com/russross/blackfriday.git
synced 2024-03-22 13:40:34 +08:00
split parser into multiple files, clean up naming
This commit is contained in:
Russ Ross
parent
4e2d6a50a7
commit
81cefb5e7c
4
Makefile
4
Makefile
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@ -2,9 +2,7 @@ include $(GOROOT)/src/Make.inc
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TARG=github.com/russross/blackfriday
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GOFILES=markdown.go html.go smartypants.go
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package:
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GOFILES=markdown.go block.go inline.go html.go smartypants.go
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include $(GOROOT)/src/Make.pkg
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193
html.go
193
html.go
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@ -18,12 +18,6 @@ import (
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"strconv"
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)
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//
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//
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// HTML rendering
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//
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//
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const (
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HTML_SKIP_HTML = 1 << iota
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HTML_SKIP_STYLE
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@ -41,7 +35,7 @@ const (
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)
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type htmlOptions struct {
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Flags int
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flags int
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close_tag string // how to end singleton tags: usually " />\n", possibly ">\n"
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toc_data struct {
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header_count int
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@ -57,78 +51,78 @@ func HtmlRenderer(flags int) *Renderer {
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// configure the rendering engine
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r := new(Renderer)
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if flags&HTML_GITHUB_BLOCKCODE == 0 {
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r.blockcode = rndr_blockcode
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r.blockcode = htmlBlockcode
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} else {
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r.blockcode = rndr_blockcode_github
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r.blockcode = htmlBlockcodeGithub
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}
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r.blockquote = rndr_blockquote
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r.blockquote = htmlBlockquote
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if flags&HTML_SKIP_HTML == 0 {
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r.blockhtml = rndr_raw_block
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r.blockhtml = htmlRawBlock
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}
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r.header = rndr_header
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r.hrule = rndr_hrule
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r.list = rndr_list
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r.listitem = rndr_listitem
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r.paragraph = rndr_paragraph
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r.table = rndr_table
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r.tableRow = rndr_tablerow
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r.tableCell = rndr_tablecell
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r.header = htmlHeader
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r.hrule = htmlHrule
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r.list = htmlList
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r.listitem = htmlListitem
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r.paragraph = htmlParagraph
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r.table = htmlTable
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r.tableRow = htmlTablerow
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r.tableCell = htmlTablecell
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r.autolink = rndr_autolink
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r.codespan = rndr_codespan
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r.doubleEmphasis = rndr_double_emphasis
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r.emphasis = rndr_emphasis
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r.autolink = htmlAutolink
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r.codespan = htmlCodespan
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r.doubleEmphasis = htmlDoubleEmphasis
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r.emphasis = htmlEmphasis
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if flags&HTML_SKIP_IMAGES == 0 {
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r.image = rndr_image
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r.image = htmlImage
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}
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r.linebreak = rndr_linebreak
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r.linebreak = htmlLinebreak
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if flags&HTML_SKIP_LINKS == 0 {
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r.link = rndr_link
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r.link = htmlLink
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}
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r.rawHtmlTag = rndr_raw_html_tag
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r.tripleEmphasis = rndr_triple_emphasis
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r.strikethrough = rndr_strikethrough
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r.rawHtmlTag = htmlRawTag
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r.tripleEmphasis = htmlTripleEmphasis
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r.strikethrough = htmlStrikethrough
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var cb *SmartypantsRenderer
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if flags&HTML_USE_SMARTYPANTS == 0 {
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r.normalText = rndr_normal_text
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r.normalText = htmlNormalText
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} else {
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cb = Smartypants(flags)
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r.normalText = rndr_smartypants
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r.normalText = htmlSmartypants
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}
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close_tag := html_close
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if flags&HTML_USE_XHTML != 0 {
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close_tag = xhtml_close
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}
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r.opaque = &htmlOptions{Flags: flags, close_tag: close_tag, smartypants: cb}
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r.opaque = &htmlOptions{flags: flags, close_tag: close_tag, smartypants: cb}
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return r
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}
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func HtmlTocRenderer(flags int) *Renderer {
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// configure the rendering engine
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r := new(Renderer)
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r.header = rndr_toc_header
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r.header = htmlTocHeader
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r.codespan = rndr_codespan
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r.doubleEmphasis = rndr_double_emphasis
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r.emphasis = rndr_emphasis
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r.tripleEmphasis = rndr_triple_emphasis
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r.strikethrough = rndr_strikethrough
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r.codespan = htmlCodespan
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r.doubleEmphasis = htmlDoubleEmphasis
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r.emphasis = htmlEmphasis
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r.tripleEmphasis = htmlTripleEmphasis
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r.strikethrough = htmlStrikethrough
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r.documentFooter = rndr_toc_finalize
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r.documentFooter = htmlTocFinalize
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close_tag := ">\n"
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if flags&HTML_USE_XHTML != 0 {
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close_tag = " />\n"
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}
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r.opaque = &htmlOptions{Flags: flags | HTML_TOC, close_tag: close_tag}
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r.opaque = &htmlOptions{flags: flags | HTML_TOC, close_tag: close_tag}
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return r
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}
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func attr_escape(ob *bytes.Buffer, src []byte) {
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func attrEscape(ob *bytes.Buffer, src []byte) {
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for i := 0; i < len(src); i++ {
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// directly copy unescaped characters
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// directly copy normal characters
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org := i
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for i < len(src) && src[i] != '<' && src[i] != '>' && src[i] != '&' && src[i] != '"' {
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i++
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@ -154,35 +148,14 @@ func attr_escape(ob *bytes.Buffer, src []byte) {
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}
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}
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func unescape_text(ob *bytes.Buffer, src []byte) {
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i := 0
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for i < len(src) {
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org := i
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for i < len(src) && src[i] != '\\' {
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i++
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}
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if i > org {
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ob.Write(src[org:i])
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}
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if i+1 >= len(src) {
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break
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}
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ob.WriteByte(src[i+1])
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i += 2
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}
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}
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func rndr_header(ob *bytes.Buffer, text []byte, level int, opaque interface{}) {
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func htmlHeader(ob *bytes.Buffer, text []byte, level int, opaque interface{}) {
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options := opaque.(*htmlOptions)
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if ob.Len() > 0 {
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ob.WriteByte('\n')
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}
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if options.Flags&HTML_TOC != 0 {
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if options.flags&HTML_TOC != 0 {
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ob.WriteString(fmt.Sprintf("<h%d id=\"toc_%d\">", level, options.toc_data.header_count))
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options.toc_data.header_count++
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} else {
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@ -193,7 +166,7 @@ func rndr_header(ob *bytes.Buffer, text []byte, level int, opaque interface{}) {
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ob.WriteString(fmt.Sprintf("</h%d>\n", level))
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}
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func rndr_raw_block(ob *bytes.Buffer, text []byte, opaque interface{}) {
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func htmlRawBlock(ob *bytes.Buffer, text []byte, opaque interface{}) {
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sz := len(text)
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for sz > 0 && text[sz-1] == '\n' {
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sz--
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@ -212,7 +185,7 @@ func rndr_raw_block(ob *bytes.Buffer, text []byte, opaque interface{}) {
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ob.WriteByte('\n')
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}
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func rndr_hrule(ob *bytes.Buffer, opaque interface{}) {
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func htmlHrule(ob *bytes.Buffer, opaque interface{}) {
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options := opaque.(*htmlOptions)
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if ob.Len() > 0 {
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@ -222,7 +195,7 @@ func rndr_hrule(ob *bytes.Buffer, opaque interface{}) {
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ob.WriteString(options.close_tag)
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}
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func rndr_blockcode(ob *bytes.Buffer, text []byte, lang string, opaque interface{}) {
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func htmlBlockcode(ob *bytes.Buffer, text []byte, lang string, opaque interface{}) {
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if ob.Len() > 0 {
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ob.WriteByte('\n')
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}
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@ -248,7 +221,7 @@ func rndr_blockcode(ob *bytes.Buffer, text []byte, lang string, opaque interface
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if cls > 0 {
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ob.WriteByte(' ')
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}
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attr_escape(ob, []byte(lang[org:]))
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attrEscape(ob, []byte(lang[org:]))
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}
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}
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@ -258,7 +231,7 @@ func rndr_blockcode(ob *bytes.Buffer, text []byte, lang string, opaque interface
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}
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if len(text) > 0 {
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attr_escape(ob, text)
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attrEscape(ob, text)
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}
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ob.WriteString("</code></pre>\n")
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@ -282,7 +255,7 @@ func rndr_blockcode(ob *bytes.Buffer, text []byte, lang string, opaque interface
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* E.g.
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* ~~~~ {.python .numbered} => <pre lang="python"><code>
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*/
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func rndr_blockcode_github(ob *bytes.Buffer, text []byte, lang string, opaque interface{}) {
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func htmlBlockcodeGithub(ob *bytes.Buffer, text []byte, lang string, opaque interface{}) {
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if ob.Len() > 0 {
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ob.WriteByte('\n')
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}
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@ -296,9 +269,9 @@ func rndr_blockcode_github(ob *bytes.Buffer, text []byte, lang string, opaque in
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}
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if lang[0] == '.' {
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attr_escape(ob, []byte(lang[1:i]))
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attrEscape(ob, []byte(lang[1:i]))
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} else {
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attr_escape(ob, []byte(lang[:i]))
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attrEscape(ob, []byte(lang[:i]))
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}
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ob.WriteString("\"><code>")
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@ -307,20 +280,20 @@ func rndr_blockcode_github(ob *bytes.Buffer, text []byte, lang string, opaque in
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}
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if len(text) > 0 {
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attr_escape(ob, text)
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attrEscape(ob, text)
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}
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ob.WriteString("</code></pre>\n")
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}
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func rndr_blockquote(ob *bytes.Buffer, text []byte, opaque interface{}) {
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func htmlBlockquote(ob *bytes.Buffer, text []byte, opaque interface{}) {
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ob.WriteString("<blockquote>\n")
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ob.Write(text)
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ob.WriteString("</blockquote>")
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}
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func rndr_table(ob *bytes.Buffer, header []byte, body []byte, opaque interface{}) {
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func htmlTable(ob *bytes.Buffer, header []byte, body []byte, opaque interface{}) {
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if ob.Len() > 0 {
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ob.WriteByte('\n')
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}
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@ -331,7 +304,7 @@ func rndr_table(ob *bytes.Buffer, header []byte, body []byte, opaque interface{}
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ob.WriteString("\n</tbody></table>")
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}
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func rndr_tablerow(ob *bytes.Buffer, text []byte, opaque interface{}) {
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func htmlTablerow(ob *bytes.Buffer, text []byte, opaque interface{}) {
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if ob.Len() > 0 {
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ob.WriteByte('\n')
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}
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@ -340,7 +313,7 @@ func rndr_tablerow(ob *bytes.Buffer, text []byte, opaque interface{}) {
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ob.WriteString("\n</tr>")
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}
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func rndr_tablecell(ob *bytes.Buffer, text []byte, align int, opaque interface{}) {
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func htmlTablecell(ob *bytes.Buffer, text []byte, align int, opaque interface{}) {
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if ob.Len() > 0 {
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ob.WriteByte('\n')
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}
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@ -359,7 +332,7 @@ func rndr_tablecell(ob *bytes.Buffer, text []byte, align int, opaque interface{}
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ob.WriteString("</td>")
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}
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func rndr_list(ob *bytes.Buffer, text []byte, flags int, opaque interface{}) {
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func htmlList(ob *bytes.Buffer, text []byte, flags int, opaque interface{}) {
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if ob.Len() > 0 {
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ob.WriteByte('\n')
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}
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@ -376,7 +349,7 @@ func rndr_list(ob *bytes.Buffer, text []byte, flags int, opaque interface{}) {
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}
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}
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func rndr_listitem(ob *bytes.Buffer, text []byte, flags int, opaque interface{}) {
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func htmlListitem(ob *bytes.Buffer, text []byte, flags int, opaque interface{}) {
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ob.WriteString("<li>")
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size := len(text)
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for size > 0 && text[size-1] == '\n' {
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@ -386,7 +359,7 @@ func rndr_listitem(ob *bytes.Buffer, text []byte, flags int, opaque interface{})
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ob.WriteString("</li>\n")
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}
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func rndr_paragraph(ob *bytes.Buffer, text []byte, opaque interface{}) {
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func htmlParagraph(ob *bytes.Buffer, text []byte, opaque interface{}) {
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options := opaque.(*htmlOptions)
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i := 0
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@ -407,7 +380,7 @@ func rndr_paragraph(ob *bytes.Buffer, text []byte, opaque interface{}) {
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}
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ob.WriteString("<p>")
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if options.Flags&HTML_HARD_WRAP != 0 {
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if options.flags&HTML_HARD_WRAP != 0 {
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for i < len(text) {
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org := i
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for i < len(text) && text[i] != '\n' {
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@ -432,13 +405,13 @@ func rndr_paragraph(ob *bytes.Buffer, text []byte, opaque interface{}) {
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ob.WriteString("</p>\n")
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}
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func rndr_autolink(ob *bytes.Buffer, link []byte, kind int, opaque interface{}) int {
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func htmlAutolink(ob *bytes.Buffer, link []byte, kind int, opaque interface{}) int {
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options := opaque.(*htmlOptions)
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if len(link) == 0 {
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return 0
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}
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if options.Flags&HTML_SAFELINK != 0 && !isSafeLink(link) && kind != LINK_TYPE_EMAIL {
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if options.flags&HTML_SAFELINK != 0 && !isSafeLink(link) && kind != LINK_TYPE_EMAIL {
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return 0
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}
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@ -455,9 +428,9 @@ func rndr_autolink(ob *bytes.Buffer, link []byte, kind int, opaque interface{})
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* want to print the `mailto:` prefix
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*/
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if bytes.HasPrefix(link, []byte("mailto:")) {
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attr_escape(ob, link[7:])
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attrEscape(ob, link[7:])
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} else {
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attr_escape(ob, link)
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attrEscape(ob, link)
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}
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ob.WriteString("</a>")
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@ -465,14 +438,14 @@ func rndr_autolink(ob *bytes.Buffer, link []byte, kind int, opaque interface{})
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return 1
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}
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func rndr_codespan(ob *bytes.Buffer, text []byte, opaque interface{}) int {
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func htmlCodespan(ob *bytes.Buffer, text []byte, opaque interface{}) int {
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ob.WriteString("<code>")
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attr_escape(ob, text)
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attrEscape(ob, text)
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ob.WriteString("</code>")
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return 1
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}
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func rndr_double_emphasis(ob *bytes.Buffer, text []byte, opaque interface{}) int {
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func htmlDoubleEmphasis(ob *bytes.Buffer, text []byte, opaque interface{}) int {
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if len(text) == 0 {
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return 0
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}
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@ -482,7 +455,7 @@ func rndr_double_emphasis(ob *bytes.Buffer, text []byte, opaque interface{}) int
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return 1
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}
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func rndr_emphasis(ob *bytes.Buffer, text []byte, opaque interface{}) int {
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func htmlEmphasis(ob *bytes.Buffer, text []byte, opaque interface{}) int {
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if len(text) == 0 {
|
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return 0
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}
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|
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@ -492,20 +465,20 @@ func rndr_emphasis(ob *bytes.Buffer, text []byte, opaque interface{}) int {
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return 1
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}
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func rndr_image(ob *bytes.Buffer, link []byte, title []byte, alt []byte, opaque interface{}) int {
|
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func htmlImage(ob *bytes.Buffer, link []byte, title []byte, alt []byte, opaque interface{}) int {
|
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options := opaque.(*htmlOptions)
|
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if len(link) == 0 {
|
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return 0
|
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}
|
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ob.WriteString("<img src=\"")
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attr_escape(ob, link)
|
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attrEscape(ob, link)
|
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ob.WriteString("\" alt=\"")
|
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if len(alt) > 0 {
|
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attr_escape(ob, alt)
|
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attrEscape(ob, alt)
|
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}
|
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if len(title) > 0 {
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ob.WriteString("\" title=\"")
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attr_escape(ob, title)
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attrEscape(ob, title)
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}
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ob.WriteByte('"')
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@ -513,17 +486,17 @@ func rndr_image(ob *bytes.Buffer, link []byte, title []byte, alt []byte, opaque
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return 1
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}
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|
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func rndr_linebreak(ob *bytes.Buffer, opaque interface{}) int {
|
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func htmlLinebreak(ob *bytes.Buffer, opaque interface{}) int {
|
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options := opaque.(*htmlOptions)
|
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ob.WriteString("<br")
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ob.WriteString(options.close_tag)
|
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return 1
|
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}
|
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|
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func rndr_link(ob *bytes.Buffer, link []byte, title []byte, content []byte, opaque interface{}) int {
|
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func htmlLink(ob *bytes.Buffer, link []byte, title []byte, content []byte, opaque interface{}) int {
|
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options := opaque.(*htmlOptions)
|
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|
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if options.Flags&HTML_SAFELINK != 0 && !isSafeLink(link) {
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if options.flags&HTML_SAFELINK != 0 && !isSafeLink(link) {
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return 0
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}
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@ -533,7 +506,7 @@ func rndr_link(ob *bytes.Buffer, link []byte, title []byte, content []byte, opaq
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}
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if len(title) > 0 {
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ob.WriteString("\" title=\"")
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attr_escape(ob, title)
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attrEscape(ob, title)
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}
|
||||
ob.WriteString("\">")
|
||||
if len(content) > 0 {
|
||||
|
|
@ -543,25 +516,25 @@ func rndr_link(ob *bytes.Buffer, link []byte, title []byte, content []byte, opaq
|
|||
return 1
|
||||
}
|
||||
|
||||
func rndr_raw_html_tag(ob *bytes.Buffer, text []byte, opaque interface{}) int {
|
||||
func htmlRawTag(ob *bytes.Buffer, text []byte, opaque interface{}) int {
|
||||
options := opaque.(*htmlOptions)
|
||||
if options.Flags&HTML_SKIP_HTML != 0 {
|
||||
if options.flags&HTML_SKIP_HTML != 0 {
|
||||
return 1
|
||||
}
|
||||
if options.Flags&HTML_SKIP_STYLE != 0 && is_html_tag(text, "style") {
|
||||
if options.flags&HTML_SKIP_STYLE != 0 && isHtmlTag(text, "style") {
|
||||
return 1
|
||||
}
|
||||
if options.Flags&HTML_SKIP_LINKS != 0 && is_html_tag(text, "a") {
|
||||
if options.flags&HTML_SKIP_LINKS != 0 && isHtmlTag(text, "a") {
|
||||
return 1
|
||||
}
|
||||
if options.Flags&HTML_SKIP_IMAGES != 0 && is_html_tag(text, "img") {
|
||||
if options.flags&HTML_SKIP_IMAGES != 0 && isHtmlTag(text, "img") {
|
||||
return 1
|
||||
}
|
||||
ob.Write(text)
|
||||
return 1
|
||||
}
|
||||
|
||||
func rndr_triple_emphasis(ob *bytes.Buffer, text []byte, opaque interface{}) int {
|
||||
func htmlTripleEmphasis(ob *bytes.Buffer, text []byte, opaque interface{}) int {
|
||||
if len(text) == 0 {
|
||||
return 0
|
||||
}
|
||||
|
|
@ -571,7 +544,7 @@ func rndr_triple_emphasis(ob *bytes.Buffer, text []byte, opaque interface{}) int
|
|||
return 1
|
||||
}
|
||||
|
||||
func rndr_strikethrough(ob *bytes.Buffer, text []byte, opaque interface{}) int {
|
||||
func htmlStrikethrough(ob *bytes.Buffer, text []byte, opaque interface{}) int {
|
||||
if len(text) == 0 {
|
||||
return 0
|
||||
}
|
||||
|
|
@ -581,11 +554,11 @@ func rndr_strikethrough(ob *bytes.Buffer, text []byte, opaque interface{}) int {
|
|||
return 1
|
||||
}
|
||||
|
||||
func rndr_normal_text(ob *bytes.Buffer, text []byte, opaque interface{}) {
|
||||
attr_escape(ob, text)
|
||||
func htmlNormalText(ob *bytes.Buffer, text []byte, opaque interface{}) {
|
||||
attrEscape(ob, text)
|
||||
}
|
||||
|
||||
func rndr_toc_header(ob *bytes.Buffer, text []byte, level int, opaque interface{}) {
|
||||
func htmlTocHeader(ob *bytes.Buffer, text []byte, level int, opaque interface{}) {
|
||||
options := opaque.(*htmlOptions)
|
||||
for level > options.toc_data.current_level {
|
||||
if options.toc_data.current_level > 0 {
|
||||
|
|
@ -614,7 +587,7 @@ func rndr_toc_header(ob *bytes.Buffer, text []byte, level int, opaque interface{
|
|||
ob.WriteString("</a></li>\n")
|
||||
}
|
||||
|
||||
func rndr_toc_finalize(ob *bytes.Buffer, opaque interface{}) {
|
||||
func htmlTocFinalize(ob *bytes.Buffer, opaque interface{}) {
|
||||
options := opaque.(*htmlOptions)
|
||||
for options.toc_data.current_level > 1 {
|
||||
ob.WriteString("</ul></li>\n")
|
||||
|
|
@ -626,7 +599,7 @@ func rndr_toc_finalize(ob *bytes.Buffer, opaque interface{}) {
|
|||
}
|
||||
}
|
||||
|
||||
func is_html_tag(tag []byte, tagname string) bool {
|
||||
func isHtmlTag(tag []byte, tagname string) bool {
|
||||
i := 0
|
||||
if i < len(tag) && tag[0] != '<' {
|
||||
return false
|
||||
|
|
|
|||
970
inline.go
Normal file
970
inline.go
Normal file
|
|
@ -0,0 +1,970 @@
|
|||
//
|
||||
// Black Friday Markdown Processor
|
||||
// Originally based on http://github.com/tanoku/upskirt
|
||||
// by Russ Ross <russ@russross.com>
|
||||
//
|
||||
|
||||
//
|
||||
// Functions to parse inline elements.
|
||||
//
|
||||
|
||||
package blackfriday
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
)
|
||||
|
||||
// Functions to parse text within a block
|
||||
// Each function returns the number of chars taken care of
|
||||
// data is the complete block being rendered
|
||||
// offset is the number of valid chars before the current cursor
|
||||
|
||||
func parseInline(out *bytes.Buffer, rndr *render, data []byte) {
|
||||
if rndr.nesting >= rndr.maxNesting {
|
||||
return
|
||||
}
|
||||
rndr.nesting++
|
||||
|
||||
i, end := 0, 0
|
||||
for i < len(data) {
|
||||
// copy inactive chars into the output
|
||||
for end < len(data) && rndr.inline[data[end]] == nil {
|
||||
end++
|
||||
}
|
||||
|
||||
if rndr.mk.normalText != nil {
|
||||
rndr.mk.normalText(out, data[i:end], rndr.mk.opaque)
|
||||
} else {
|
||||
out.Write(data[i:end])
|
||||
}
|
||||
|
||||
if end >= len(data) {
|
||||
break
|
||||
}
|
||||
i = end
|
||||
|
||||
// call the trigger
|
||||
parser := rndr.inline[data[end]]
|
||||
end = parser(out, rndr, data, i)
|
||||
|
||||
if end == 0 { // no action from the callback
|
||||
end = i + 1
|
||||
} else {
|
||||
i += end
|
||||
end = i
|
||||
}
|
||||
}
|
||||
|
||||
rndr.nesting--
|
||||
}
|
||||
|
||||
// single and double emphasis parsing
|
||||
func inlineEmphasis(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
|
||||
data = data[offset:]
|
||||
c := data[0]
|
||||
ret := 0
|
||||
|
||||
if len(data) > 2 && data[1] != c {
|
||||
// whitespace cannot follow an opening emphasis;
|
||||
// strikethrough only takes two characters '~~'
|
||||
if c == '~' || isspace(data[1]) {
|
||||
return 0
|
||||
}
|
||||
if ret = inlineHelperEmph1(out, rndr, data[1:], c); ret == 0 {
|
||||
return 0
|
||||
}
|
||||
|
||||
return ret + 1
|
||||
}
|
||||
|
||||
if len(data) > 3 && data[1] == c && data[2] != c {
|
||||
if isspace(data[2]) {
|
||||
return 0
|
||||
}
|
||||
if ret = inlineHelperEmph2(out, rndr, data[2:], c); ret == 0 {
|
||||
return 0
|
||||
}
|
||||
|
||||
return ret + 2
|
||||
}
|
||||
|
||||
if len(data) > 4 && data[1] == c && data[2] == c && data[3] != c {
|
||||
if c == '~' || isspace(data[3]) {
|
||||
return 0
|
||||
}
|
||||
if ret = inlineHelperEmph3(out, rndr, data, 3, c); ret == 0 {
|
||||
return 0
|
||||
}
|
||||
|
||||
return ret + 3
|
||||
}
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
func inlineCodespan(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
|
||||
data = data[offset:]
|
||||
|
||||
nb := 0
|
||||
|
||||
// count the number of backticks in the delimiter
|
||||
for nb < len(data) && data[nb] == '`' {
|
||||
nb++
|
||||
}
|
||||
|
||||
// find the next delimiter
|
||||
i, end := 0, 0
|
||||
for end = nb; end < len(data) && i < nb; end++ {
|
||||
if data[end] == '`' {
|
||||
i++
|
||||
} else {
|
||||
i = 0
|
||||
}
|
||||
}
|
||||
|
||||
if i < nb && end >= len(data) {
|
||||
return 0 // no matching delimiter
|
||||
}
|
||||
|
||||
// trim outside whitespace
|
||||
f_begin := nb
|
||||
for f_begin < end && (data[f_begin] == ' ' || data[f_begin] == '\t') {
|
||||
f_begin++
|
||||
}
|
||||
|
||||
f_end := end - nb
|
||||
for f_end > nb && (data[f_end-1] == ' ' || data[f_end-1] == '\t') {
|
||||
f_end--
|
||||
}
|
||||
|
||||
// real code span
|
||||
if rndr.mk.codespan == nil {
|
||||
return 0
|
||||
}
|
||||
if f_begin < f_end {
|
||||
if rndr.mk.codespan(out, data[f_begin:f_end], rndr.mk.opaque) == 0 {
|
||||
end = 0
|
||||
}
|
||||
} else {
|
||||
if rndr.mk.codespan(out, nil, rndr.mk.opaque) == 0 {
|
||||
end = 0
|
||||
}
|
||||
}
|
||||
|
||||
return end
|
||||
|
||||
}
|
||||
|
||||
// '\n' preceded by two spaces
|
||||
func inlineLinebreak(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
|
||||
if offset < 2 || data[offset-1] != ' ' || data[offset-2] != ' ' {
|
||||
return 0
|
||||
}
|
||||
|
||||
// remove trailing spaces from out and render
|
||||
outBytes := out.Bytes()
|
||||
end := len(outBytes)
|
||||
for end > 0 && outBytes[end-1] == ' ' {
|
||||
end--
|
||||
}
|
||||
out.Truncate(end)
|
||||
|
||||
if rndr.mk.linebreak == nil {
|
||||
return 0
|
||||
}
|
||||
if rndr.mk.linebreak(out, rndr.mk.opaque) > 0 {
|
||||
return 1
|
||||
} else {
|
||||
return 0
|
||||
}
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
// '[': parse a link or an image
|
||||
func inlineLink(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
|
||||
isImg := offset > 0 && data[offset-1] == '!'
|
||||
|
||||
data = data[offset:]
|
||||
|
||||
i := 1
|
||||
var title, link []byte
|
||||
text_has_nl := false
|
||||
|
||||
// check whether the correct renderer exists
|
||||
if (isImg && rndr.mk.image == nil) || (!isImg && rndr.mk.link == nil) {
|
||||
return 0
|
||||
}
|
||||
|
||||
// look for the matching closing bracket
|
||||
for level := 1; level > 0 && i < len(data); i++ {
|
||||
switch {
|
||||
case data[i] == '\n':
|
||||
text_has_nl = true
|
||||
|
||||
case data[i-1] == '\\':
|
||||
continue
|
||||
|
||||
case data[i] == '[':
|
||||
level++
|
||||
|
||||
case data[i] == ']':
|
||||
level--
|
||||
if level <= 0 {
|
||||
i-- // compensate for extra i++ in for loop
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if i >= len(data) {
|
||||
return 0
|
||||
}
|
||||
|
||||
txt_e := i
|
||||
i++
|
||||
|
||||
// skip any amount of whitespace or newline
|
||||
// (this is much more lax than original markdown syntax)
|
||||
for i < len(data) && isspace(data[i]) {
|
||||
i++
|
||||
}
|
||||
|
||||
// inline style link
|
||||
switch {
|
||||
case i < len(data) && data[i] == '(':
|
||||
// skip initial whitespace
|
||||
i++
|
||||
|
||||
for i < len(data) && isspace(data[i]) {
|
||||
i++
|
||||
}
|
||||
|
||||
link_b := i
|
||||
|
||||
// look for link end: ' " )
|
||||
for i < len(data) {
|
||||
if data[i] == '\\' {
|
||||
i += 2
|
||||
} else {
|
||||
if data[i] == ')' || data[i] == '\'' || data[i] == '"' {
|
||||
break
|
||||
}
|
||||
i++
|
||||
}
|
||||
}
|
||||
|
||||
if i >= len(data) {
|
||||
return 0
|
||||
}
|
||||
link_e := i
|
||||
|
||||
// look for title end if present
|
||||
title_b, title_e := 0, 0
|
||||
if data[i] == '\'' || data[i] == '"' {
|
||||
i++
|
||||
title_b = i
|
||||
|
||||
for i < len(data) {
|
||||
if data[i] == '\\' {
|
||||
i += 2
|
||||
} else {
|
||||
if data[i] == ')' {
|
||||
break
|
||||
}
|
||||
i++
|
||||
}
|
||||
}
|
||||
|
||||
if i >= len(data) {
|
||||
return 0
|
||||
}
|
||||
|
||||
// skip whitespace after title
|
||||
title_e = i - 1
|
||||
for title_e > title_b && isspace(data[title_e]) {
|
||||
title_e--
|
||||
}
|
||||
|
||||
// check for closing quote presence
|
||||
if data[title_e] != '\'' && data[title_e] != '"' {
|
||||
title_b, title_e = 0, 0
|
||||
link_e = i
|
||||
}
|
||||
}
|
||||
|
||||
// remove whitespace at the end of the link
|
||||
for link_e > link_b && isspace(data[link_e-1]) {
|
||||
link_e--
|
||||
}
|
||||
|
||||
// remove optional angle brackets around the link
|
||||
if data[link_b] == '<' {
|
||||
link_b++
|
||||
}
|
||||
if data[link_e-1] == '>' {
|
||||
link_e--
|
||||
}
|
||||
|
||||
// build escaped link and title
|
||||
if link_e > link_b {
|
||||
link = data[link_b:link_e]
|
||||
}
|
||||
|
||||
if title_e > title_b {
|
||||
title = data[title_b:title_e]
|
||||
}
|
||||
|
||||
i++
|
||||
|
||||
// reference style link
|
||||
case i < len(data) && data[i] == '[':
|
||||
var id []byte
|
||||
|
||||
// look for the id
|
||||
i++
|
||||
link_b := i
|
||||
for i < len(data) && data[i] != ']' {
|
||||
i++
|
||||
}
|
||||
if i >= len(data) {
|
||||
return 0
|
||||
}
|
||||
link_e := i
|
||||
|
||||
// find the reference
|
||||
if link_b == link_e {
|
||||
if text_has_nl {
|
||||
b := bytes.NewBuffer(nil)
|
||||
|
||||
for j := 1; j < txt_e; j++ {
|
||||
switch {
|
||||
case data[j] != '\n':
|
||||
b.WriteByte(data[j])
|
||||
case data[j-1] != ' ':
|
||||
b.WriteByte(' ')
|
||||
}
|
||||
}
|
||||
|
||||
id = b.Bytes()
|
||||
} else {
|
||||
id = data[1:txt_e]
|
||||
}
|
||||
} else {
|
||||
id = data[link_b:link_e]
|
||||
}
|
||||
|
||||
// find the reference with matching id (ids are case-insensitive)
|
||||
key := string(bytes.ToLower(id))
|
||||
lr, ok := rndr.refs[key]
|
||||
if !ok {
|
||||
return 0
|
||||
}
|
||||
|
||||
// keep link and title from reference
|
||||
link = lr.link
|
||||
title = lr.title
|
||||
i++
|
||||
|
||||
// shortcut reference style link
|
||||
default:
|
||||
var id []byte
|
||||
|
||||
// craft the id
|
||||
if text_has_nl {
|
||||
b := bytes.NewBuffer(nil)
|
||||
|
||||
for j := 1; j < txt_e; j++ {
|
||||
switch {
|
||||
case data[j] != '\n':
|
||||
b.WriteByte(data[j])
|
||||
case data[j-1] != ' ':
|
||||
b.WriteByte(' ')
|
||||
}
|
||||
}
|
||||
|
||||
id = b.Bytes()
|
||||
} else {
|
||||
id = data[1:txt_e]
|
||||
}
|
||||
|
||||
// find the reference with matching id
|
||||
key := string(bytes.ToLower(id))
|
||||
lr, ok := rndr.refs[key]
|
||||
if !ok {
|
||||
return 0
|
||||
}
|
||||
|
||||
// keep link and title from reference
|
||||
link = lr.link
|
||||
title = lr.title
|
||||
|
||||
// rewind the whitespace
|
||||
i = txt_e + 1
|
||||
}
|
||||
|
||||
// build content: img alt is escaped, link content is parsed
|
||||
content := bytes.NewBuffer(nil)
|
||||
if txt_e > 1 {
|
||||
if isImg {
|
||||
content.Write(data[1:txt_e])
|
||||
} else {
|
||||
parseInline(content, rndr, data[1:txt_e])
|
||||
}
|
||||
}
|
||||
|
||||
var u_link []byte
|
||||
if len(link) > 0 {
|
||||
u_link_buf := bytes.NewBuffer(nil)
|
||||
unescapeText(u_link_buf, link)
|
||||
u_link = u_link_buf.Bytes()
|
||||
}
|
||||
|
||||
// call the relevant rendering function
|
||||
ret := 0
|
||||
if isImg {
|
||||
outSize := out.Len()
|
||||
outBytes := out.Bytes()
|
||||
if outSize > 0 && outBytes[outSize-1] == '!' {
|
||||
out.Truncate(outSize - 1)
|
||||
}
|
||||
|
||||
ret = rndr.mk.image(out, u_link, title, content.Bytes(), rndr.mk.opaque)
|
||||
} else {
|
||||
ret = rndr.mk.link(out, u_link, title, content.Bytes(), rndr.mk.opaque)
|
||||
}
|
||||
|
||||
if ret > 0 {
|
||||
return i
|
||||
}
|
||||
return 0
|
||||
}
|
||||
|
||||
// '<' when tags or autolinks are allowed
|
||||
func inlineLangle(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
|
||||
data = data[offset:]
|
||||
altype := LINK_TYPE_NOT_AUTOLINK
|
||||
end := tagLength(data, &altype)
|
||||
ret := 0
|
||||
|
||||
if end > 2 {
|
||||
switch {
|
||||
case rndr.mk.autolink != nil && altype != LINK_TYPE_NOT_AUTOLINK:
|
||||
u_link := bytes.NewBuffer(nil)
|
||||
unescapeText(u_link, data[1:end+1-2])
|
||||
ret = rndr.mk.autolink(out, u_link.Bytes(), altype, rndr.mk.opaque)
|
||||
case rndr.mk.rawHtmlTag != nil:
|
||||
ret = rndr.mk.rawHtmlTag(out, data[:end], rndr.mk.opaque)
|
||||
}
|
||||
}
|
||||
|
||||
if ret == 0 {
|
||||
return 0
|
||||
}
|
||||
return end
|
||||
}
|
||||
|
||||
// '\\' backslash escape
|
||||
var escapeChars = []byte("\\`*_{}[]()#+-.!:|&<>")
|
||||
|
||||
func inlineEscape(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
|
||||
data = data[offset:]
|
||||
|
||||
if len(data) > 1 {
|
||||
if bytes.IndexByte(escapeChars, data[1]) < 0 {
|
||||
return 0
|
||||
}
|
||||
|
||||
if rndr.mk.normalText != nil {
|
||||
rndr.mk.normalText(out, data[1:2], rndr.mk.opaque)
|
||||
} else {
|
||||
out.WriteByte(data[1])
|
||||
}
|
||||
}
|
||||
|
||||
return 2
|
||||
}
|
||||
|
||||
func unescapeText(ob *bytes.Buffer, src []byte) {
|
||||
i := 0
|
||||
for i < len(src) {
|
||||
org := i
|
||||
for i < len(src) && src[i] != '\\' {
|
||||
i++
|
||||
}
|
||||
|
||||
if i > org {
|
||||
ob.Write(src[org:i])
|
||||
}
|
||||
|
||||
if i+1 >= len(src) {
|
||||
break
|
||||
}
|
||||
|
||||
ob.WriteByte(src[i+1])
|
||||
i += 2
|
||||
}
|
||||
}
|
||||
|
||||
// '&' escaped when it doesn't belong to an entity
|
||||
// valid entities are assumed to be anything matching &#?[A-Za-z0-9]+;
|
||||
func inlineEntity(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
|
||||
data = data[offset:]
|
||||
|
||||
end := 1
|
||||
|
||||
if end < len(data) && data[end] == '#' {
|
||||
end++
|
||||
}
|
||||
|
||||
for end < len(data) && isalnum(data[end]) {
|
||||
end++
|
||||
}
|
||||
|
||||
if end < len(data) && data[end] == ';' {
|
||||
end++ // real entity
|
||||
} else {
|
||||
return 0 // lone '&'
|
||||
}
|
||||
|
||||
if rndr.mk.entity != nil {
|
||||
rndr.mk.entity(out, data[:end], rndr.mk.opaque)
|
||||
} else {
|
||||
out.Write(data[:end])
|
||||
}
|
||||
|
||||
return end
|
||||
}
|
||||
|
||||
func inlineAutolink(out *bytes.Buffer, rndr *render, data []byte, offset int) int {
|
||||
orig_data := data
|
||||
data = data[offset:]
|
||||
|
||||
if offset > 0 {
|
||||
if !isspace(orig_data[offset-1]) && !ispunct(orig_data[offset-1]) {
|
||||
return 0
|
||||
}
|
||||
}
|
||||
|
||||
if !isSafeLink(data) {
|
||||
return 0
|
||||
}
|
||||
|
||||
link_end := 0
|
||||
for link_end < len(data) && !isspace(data[link_end]) {
|
||||
link_end++
|
||||
}
|
||||
|
||||
// Skip punctuation at the end of the link
|
||||
if (data[link_end-1] == '.' || data[link_end-1] == ',' || data[link_end-1] == ';') && data[link_end-2] != '\\' {
|
||||
link_end--
|
||||
}
|
||||
|
||||
// See if the link finishes with a punctuation sign that can be closed.
|
||||
var copen byte
|
||||
switch data[link_end-1] {
|
||||
case '"':
|
||||
copen = '"'
|
||||
case '\'':
|
||||
copen = '\''
|
||||
case ')':
|
||||
copen = '('
|
||||
case ']':
|
||||
copen = '['
|
||||
case '}':
|
||||
copen = '{'
|
||||
default:
|
||||
copen = 0
|
||||
}
|
||||
|
||||
if copen != 0 {
|
||||
buf_end := offset + link_end - 2
|
||||
|
||||
open_delim := 1
|
||||
|
||||
/* Try to close the final punctuation sign in this same line;
|
||||
* if we managed to close it outside of the URL, that means that it's
|
||||
* not part of the URL. If it closes inside the URL, that means it
|
||||
* is part of the URL.
|
||||
*
|
||||
* Examples:
|
||||
*
|
||||
* foo http://www.pokemon.com/Pikachu_(Electric) bar
|
||||
* => http://www.pokemon.com/Pikachu_(Electric)
|
||||
*
|
||||
* foo (http://www.pokemon.com/Pikachu_(Electric)) bar
|
||||
* => http://www.pokemon.com/Pikachu_(Electric)
|
||||
*
|
||||
* foo http://www.pokemon.com/Pikachu_(Electric)) bar
|
||||
* => http://www.pokemon.com/Pikachu_(Electric))
|
||||
*
|
||||
* (foo http://www.pokemon.com/Pikachu_(Electric)) bar
|
||||
* => foo http://www.pokemon.com/Pikachu_(Electric)
|
||||
*/
|
||||
|
||||
for buf_end >= 0 && orig_data[buf_end] != '\n' && open_delim != 0 {
|
||||
if orig_data[buf_end] == data[link_end-1] {
|
||||
open_delim++
|
||||
}
|
||||
|
||||
if orig_data[buf_end] == copen {
|
||||
open_delim--
|
||||
}
|
||||
|
||||
buf_end--
|
||||
}
|
||||
|
||||
if open_delim == 0 {
|
||||
link_end--
|
||||
}
|
||||
}
|
||||
|
||||
if rndr.mk.autolink != nil {
|
||||
u_link := bytes.NewBuffer(nil)
|
||||
unescapeText(u_link, data[:link_end])
|
||||
|
||||
rndr.mk.autolink(out, u_link.Bytes(), LINK_TYPE_NORMAL, rndr.mk.opaque)
|
||||
}
|
||||
|
||||
return link_end
|
||||
}
|
||||
|
||||
var validUris = [][]byte{[]byte("http://"), []byte("https://"), []byte("ftp://"), []byte("mailto://")}
|
||||
|
||||
func isSafeLink(link []byte) bool {
|
||||
for _, prefix := range validUris {
|
||||
// TODO: handle unicode here
|
||||
// case-insensitive prefix test
|
||||
if len(link) > len(prefix) && !less(link[:len(prefix)], prefix) && !less(prefix, link[:len(prefix)]) && isalnum(link[len(prefix)]) {
|
||||
return true
|
||||
}
|
||||
}
|
||||
|
||||
return false
|
||||
}
|
||||
|
||||
// return the length of the given tag, or 0 is it's not valid
|
||||
func tagLength(data []byte, autolink *int) int {
|
||||
var i, j int
|
||||
|
||||
// a valid tag can't be shorter than 3 chars
|
||||
if len(data) < 3 {
|
||||
return 0
|
||||
}
|
||||
|
||||
// begins with a '<' optionally followed by '/', followed by letter or number
|
||||
if data[0] != '<' {
|
||||
return 0
|
||||
}
|
||||
if data[1] == '/' {
|
||||
i = 2
|
||||
} else {
|
||||
i = 1
|
||||
}
|
||||
|
||||
if !isalnum(data[i]) {
|
||||
return 0
|
||||
}
|
||||
|
||||
// scheme test
|
||||
*autolink = LINK_TYPE_NOT_AUTOLINK
|
||||
|
||||
// try to find the beggining of an URI
|
||||
for i < len(data) && (isalnum(data[i]) || data[i] == '.' || data[i] == '+' || data[i] == '-') {
|
||||
i++
|
||||
}
|
||||
|
||||
if i > 1 && data[i] == '@' {
|
||||
if j = isMailtoAutolink(data[i:]); j != 0 {
|
||||
*autolink = LINK_TYPE_EMAIL
|
||||
return i + j
|
||||
}
|
||||
}
|
||||
|
||||
if i > 2 && data[i] == ':' {
|
||||
*autolink = LINK_TYPE_NORMAL
|
||||
i++
|
||||
}
|
||||
|
||||
// complete autolink test: no whitespace or ' or "
|
||||
switch {
|
||||
case i >= len(data):
|
||||
*autolink = LINK_TYPE_NOT_AUTOLINK
|
||||
case *autolink != 0:
|
||||
j = i
|
||||
|
||||
for i < len(data) {
|
||||
if data[i] == '\\' {
|
||||
i += 2
|
||||
} else {
|
||||
if data[i] == '>' || data[i] == '\'' || data[i] == '"' || isspace(data[i]) {
|
||||
break
|
||||
} else {
|
||||
i++
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
if i >= len(data) {
|
||||
return 0
|
||||
}
|
||||
if i > j && data[i] == '>' {
|
||||
return i + 1
|
||||
}
|
||||
|
||||
// one of the forbidden chars has been found
|
||||
*autolink = LINK_TYPE_NOT_AUTOLINK
|
||||
}
|
||||
|
||||
// look for something looking like a tag end
|
||||
for i < len(data) && data[i] != '>' {
|
||||
i++
|
||||
}
|
||||
if i >= len(data) {
|
||||
return 0
|
||||
}
|
||||
return i + 1
|
||||
}
|
||||
|
||||
// look for the address part of a mail autolink and '>'
|
||||
// this is less strict than the original markdown e-mail address matching
|
||||
func isMailtoAutolink(data []byte) int {
|
||||
nb := 0
|
||||
|
||||
// address is assumed to be: [-@._a-zA-Z0-9]+ with exactly one '@'
|
||||
for i := 0; i < len(data); i++ {
|
||||
if isalnum(data[i]) {
|
||||
continue
|
||||
}
|
||||
|
||||
switch data[i] {
|
||||
case '@':
|
||||
nb++
|
||||
|
||||
case '-', '.', '_':
|
||||
break
|
||||
|
||||
case '>':
|
||||
if nb == 1 {
|
||||
return i + 1
|
||||
} else {
|
||||
return 0
|
||||
}
|
||||
default:
|
||||
return 0
|
||||
}
|
||||
}
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
// look for the next emph char, skipping other constructs
|
||||
func inlineHelperFindEmphChar(data []byte, c byte) int {
|
||||
i := 1
|
||||
|
||||
for i < len(data) {
|
||||
for i < len(data) && data[i] != c && data[i] != '`' && data[i] != '[' {
|
||||
i++
|
||||
}
|
||||
if i >= len(data) {
|
||||
return 0
|
||||
}
|
||||
if data[i] == c {
|
||||
return i
|
||||
}
|
||||
|
||||
// do not count escaped chars
|
||||
if i != 0 && data[i-1] == '\\' {
|
||||
i++
|
||||
continue
|
||||
}
|
||||
|
||||
if data[i] == '`' {
|
||||
// skip a code span
|
||||
tmp_i := 0
|
||||
i++
|
||||
for i < len(data) && data[i] != '`' {
|
||||
if tmp_i == 0 && data[i] == c {
|
||||
tmp_i = i
|
||||
}
|
||||
i++
|
||||
}
|
||||
if i >= len(data) {
|
||||
return tmp_i
|
||||
}
|
||||
i++
|
||||
} else {
|
||||
if data[i] == '[' {
|
||||
// skip a link
|
||||
tmp_i := 0
|
||||
i++
|
||||
for i < len(data) && data[i] != ']' {
|
||||
if tmp_i == 0 && data[i] == c {
|
||||
tmp_i = i
|
||||
}
|
||||
i++
|
||||
}
|
||||
i++
|
||||
for i < len(data) && (data[i] == ' ' || data[i] == '\t' || data[i] == '\n') {
|
||||
i++
|
||||
}
|
||||
if i >= len(data) {
|
||||
return tmp_i
|
||||
}
|
||||
if data[i] != '[' && data[i] != '(' { // not a link
|
||||
if tmp_i > 0 {
|
||||
return tmp_i
|
||||
} else {
|
||||
continue
|
||||
}
|
||||
}
|
||||
cc := data[i]
|
||||
i++
|
||||
for i < len(data) && data[i] != cc {
|
||||
if tmp_i == 0 && data[i] == c {
|
||||
tmp_i = i
|
||||
}
|
||||
i++
|
||||
}
|
||||
if i >= len(data) {
|
||||
return tmp_i
|
||||
}
|
||||
i++
|
||||
}
|
||||
}
|
||||
}
|
||||
return 0
|
||||
}
|
||||
|
||||
func inlineHelperEmph1(out *bytes.Buffer, rndr *render, data []byte, c byte) int {
|
||||
i := 0
|
||||
|
||||
if rndr.mk.emphasis == nil {
|
||||
return 0
|
||||
}
|
||||
|
||||
// skip one symbol if coming from emph3
|
||||
if len(data) > 1 && data[0] == c && data[1] == c {
|
||||
i = 1
|
||||
}
|
||||
|
||||
for i < len(data) {
|
||||
length := inlineHelperFindEmphChar(data[i:], c)
|
||||
if length == 0 {
|
||||
return 0
|
||||
}
|
||||
i += length
|
||||
if i >= len(data) {
|
||||
return 0
|
||||
}
|
||||
|
||||
if i+1 < len(data) && data[i+1] == c {
|
||||
i++
|
||||
continue
|
||||
}
|
||||
|
||||
if data[i] == c && !isspace(data[i-1]) {
|
||||
|
||||
if rndr.flags&EXTENSION_NO_INTRA_EMPHASIS != 0 {
|
||||
if !(i+1 == len(data) || isspace(data[i+1]) || ispunct(data[i+1])) {
|
||||
continue
|
||||
}
|
||||
}
|
||||
|
||||
work := bytes.NewBuffer(nil)
|
||||
parseInline(work, rndr, data[:i])
|
||||
r := rndr.mk.emphasis(out, work.Bytes(), rndr.mk.opaque)
|
||||
if r > 0 {
|
||||
return i + 1
|
||||
} else {
|
||||
return 0
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
func inlineHelperEmph2(out *bytes.Buffer, rndr *render, data []byte, c byte) int {
|
||||
render_method := rndr.mk.doubleEmphasis
|
||||
if c == '~' {
|
||||
render_method = rndr.mk.strikethrough
|
||||
}
|
||||
|
||||
if render_method == nil {
|
||||
return 0
|
||||
}
|
||||
|
||||
i := 0
|
||||
|
||||
for i < len(data) {
|
||||
length := inlineHelperFindEmphChar(data[i:], c)
|
||||
if length == 0 {
|
||||
return 0
|
||||
}
|
||||
i += length
|
||||
|
||||
if i+1 < len(data) && data[i] == c && data[i+1] == c && i > 0 && !isspace(data[i-1]) {
|
||||
work := bytes.NewBuffer(nil)
|
||||
parseInline(work, rndr, data[:i])
|
||||
r := render_method(out, work.Bytes(), rndr.mk.opaque)
|
||||
if r > 0 {
|
||||
return i + 2
|
||||
} else {
|
||||
return 0
|
||||
}
|
||||
}
|
||||
i++
|
||||
}
|
||||
return 0
|
||||
}
|
||||
|
||||
func inlineHelperEmph3(out *bytes.Buffer, rndr *render, data []byte, offset int, c byte) int {
|
||||
i := 0
|
||||
orig_data := data
|
||||
data = data[offset:]
|
||||
|
||||
for i < len(data) {
|
||||
length := inlineHelperFindEmphChar(data[i:], c)
|
||||
if length == 0 {
|
||||
return 0
|
||||
}
|
||||
i += length
|
||||
|
||||
// skip whitespace preceded symbols
|
||||
if data[i] != c || isspace(data[i-1]) {
|
||||
continue
|
||||
}
|
||||
|
||||
switch {
|
||||
case (i+2 < len(data) && data[i+1] == c && data[i+2] == c && rndr.mk.tripleEmphasis != nil):
|
||||
// triple symbol found
|
||||
work := bytes.NewBuffer(nil)
|
||||
|
||||
parseInline(work, rndr, data[:i])
|
||||
r := rndr.mk.tripleEmphasis(out, work.Bytes(), rndr.mk.opaque)
|
||||
if r > 0 {
|
||||
return i + 3
|
||||
} else {
|
||||
return 0
|
||||
}
|
||||
case (i+1 < len(data) && data[i+1] == c):
|
||||
// double symbol found, hand over to emph1
|
||||
length = inlineHelperEmph1(out, rndr, orig_data[offset-2:], c)
|
||||
if length == 0 {
|
||||
return 0
|
||||
} else {
|
||||
return length - 2
|
||||
}
|
||||
default:
|
||||
// single symbol found, hand over to emph2
|
||||
length = inlineHelperEmph2(out, rndr, orig_data[offset-1:], c)
|
||||
if length == 0 {
|
||||
return 0
|
||||
} else {
|
||||
return length - 1
|
||||
}
|
||||
}
|
||||
}
|
||||
return 0
|
||||
}
|
||||
1958
markdown.go
1958
markdown.go
File diff suppressed because it is too large
Load Diff
144
smartypants.go
144
smartypants.go
|
|
@ -16,12 +16,12 @@ import (
|
|||
"bytes"
|
||||
)
|
||||
|
||||
type smartypants_data struct {
|
||||
in_squote bool
|
||||
in_dquote bool
|
||||
type smartypantsData struct {
|
||||
inSingleQuote bool
|
||||
inDoubleQuote bool
|
||||
}
|
||||
|
||||
func word_boundary(c byte) bool {
|
||||
func wordBoundary(c byte) bool {
|
||||
return c == 0 || isspace(c) || ispunct(c)
|
||||
}
|
||||
|
||||
|
|
@ -36,26 +36,26 @@ func isdigit(c byte) bool {
|
|||
return c >= '0' && c <= '9'
|
||||
}
|
||||
|
||||
func smartypants_quotes(ob *bytes.Buffer, previous_char byte, next_char byte, quote byte, is_open *bool) bool {
|
||||
func smartQuotesHelper(ob *bytes.Buffer, previousChar byte, nextChar byte, quote byte, isOpen *bool) bool {
|
||||
switch {
|
||||
// edge of the buffer is likely to be a tag that we don't get to see,
|
||||
// so we assume there is text there
|
||||
case word_boundary(previous_char) && previous_char != 0 && next_char == 0:
|
||||
*is_open = true
|
||||
case previous_char == 0 && word_boundary(next_char) && next_char != 0:
|
||||
*is_open = false
|
||||
case word_boundary(previous_char) && !word_boundary(next_char):
|
||||
*is_open = true
|
||||
case !word_boundary(previous_char) && word_boundary(next_char):
|
||||
*is_open = false
|
||||
case !word_boundary(previous_char) && !word_boundary(next_char):
|
||||
*is_open = true
|
||||
case wordBoundary(previousChar) && previousChar != 0 && nextChar == 0:
|
||||
*isOpen = true
|
||||
case previousChar == 0 && wordBoundary(nextChar) && nextChar != 0:
|
||||
*isOpen = false
|
||||
case wordBoundary(previousChar) && !wordBoundary(nextChar):
|
||||
*isOpen = true
|
||||
case !wordBoundary(previousChar) && wordBoundary(nextChar):
|
||||
*isOpen = false
|
||||
case !wordBoundary(previousChar) && !wordBoundary(nextChar):
|
||||
*isOpen = true
|
||||
default:
|
||||
*is_open = !*is_open
|
||||
*isOpen = !*isOpen
|
||||
}
|
||||
|
||||
ob.WriteByte('&')
|
||||
if *is_open {
|
||||
if *isOpen {
|
||||
ob.WriteByte('l')
|
||||
} else {
|
||||
ob.WriteByte('r')
|
||||
|
|
@ -65,21 +65,21 @@ func smartypants_quotes(ob *bytes.Buffer, previous_char byte, next_char byte, qu
|
|||
return true
|
||||
}
|
||||
|
||||
func smartypants_cb__squote(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
|
||||
func smartSquote(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
|
||||
if len(text) >= 2 {
|
||||
t1 := tolower(text[1])
|
||||
|
||||
if t1 == '\'' {
|
||||
next_char := byte(0)
|
||||
nextChar := byte(0)
|
||||
if len(text) >= 3 {
|
||||
next_char = text[2]
|
||||
nextChar = text[2]
|
||||
}
|
||||
if smartypants_quotes(ob, previous_char, next_char, 'd', &smrt.in_dquote) {
|
||||
if smartQuotesHelper(ob, previousChar, nextChar, 'd', &smrt.inDoubleQuote) {
|
||||
return 1
|
||||
}
|
||||
}
|
||||
|
||||
if (t1 == 's' || t1 == 't' || t1 == 'm' || t1 == 'd') && (len(text) < 3 || word_boundary(text[2])) {
|
||||
if (t1 == 's' || t1 == 't' || t1 == 'm' || t1 == 'd') && (len(text) < 3 || wordBoundary(text[2])) {
|
||||
ob.WriteString("’")
|
||||
return 0
|
||||
}
|
||||
|
|
@ -87,18 +87,18 @@ func smartypants_cb__squote(ob *bytes.Buffer, smrt *smartypants_data, previous_c
|
|||
if len(text) >= 3 {
|
||||
t2 := tolower(text[2])
|
||||
|
||||
if ((t1 == 'r' && t2 == 'e') || (t1 == 'l' && t2 == 'l') || (t1 == 'v' && t2 == 'e')) && (len(text) < 4 || word_boundary(text[3])) {
|
||||
if ((t1 == 'r' && t2 == 'e') || (t1 == 'l' && t2 == 'l') || (t1 == 'v' && t2 == 'e')) && (len(text) < 4 || wordBoundary(text[3])) {
|
||||
ob.WriteString("’")
|
||||
return 0
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
next_char := byte(0)
|
||||
nextChar := byte(0)
|
||||
if len(text) > 1 {
|
||||
next_char = text[1]
|
||||
nextChar = text[1]
|
||||
}
|
||||
if smartypants_quotes(ob, previous_char, next_char, 's', &smrt.in_squote) {
|
||||
if smartQuotesHelper(ob, previousChar, nextChar, 's', &smrt.inSingleQuote) {
|
||||
return 0
|
||||
}
|
||||
|
||||
|
|
@ -106,7 +106,7 @@ func smartypants_cb__squote(ob *bytes.Buffer, smrt *smartypants_data, previous_c
|
|||
return 0
|
||||
}
|
||||
|
||||
func smartypants_cb__parens(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
|
||||
func smartParens(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
|
||||
if len(text) >= 3 {
|
||||
t1 := tolower(text[1])
|
||||
t2 := tolower(text[2])
|
||||
|
|
@ -131,14 +131,14 @@ func smartypants_cb__parens(ob *bytes.Buffer, smrt *smartypants_data, previous_c
|
|||
return 0
|
||||
}
|
||||
|
||||
func smartypants_cb__dash(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
|
||||
func smartDash(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
|
||||
if len(text) >= 2 {
|
||||
if text[1] == '-' {
|
||||
ob.WriteString("—")
|
||||
return 1
|
||||
}
|
||||
|
||||
if word_boundary(previous_char) && word_boundary(text[1]) {
|
||||
if wordBoundary(previousChar) && wordBoundary(text[1]) {
|
||||
ob.WriteString("–")
|
||||
return 0
|
||||
}
|
||||
|
|
@ -148,7 +148,7 @@ func smartypants_cb__dash(ob *bytes.Buffer, smrt *smartypants_data, previous_cha
|
|||
return 0
|
||||
}
|
||||
|
||||
func smartypants_cb__dash_latex(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
|
||||
func smartDashLatex(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
|
||||
if len(text) >= 3 && text[1] == '-' && text[2] == '-' {
|
||||
ob.WriteString("—")
|
||||
return 2
|
||||
|
|
@ -162,13 +162,13 @@ func smartypants_cb__dash_latex(ob *bytes.Buffer, smrt *smartypants_data, previo
|
|||
return 0
|
||||
}
|
||||
|
||||
func smartypants_cb__amp(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
|
||||
func smartAmp(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
|
||||
if bytes.HasPrefix(text, []byte(""")) {
|
||||
next_char := byte(0)
|
||||
nextChar := byte(0)
|
||||
if len(text) >= 7 {
|
||||
next_char = text[6]
|
||||
nextChar = text[6]
|
||||
}
|
||||
if smartypants_quotes(ob, previous_char, next_char, 'd', &smrt.in_dquote) {
|
||||
if smartQuotesHelper(ob, previousChar, nextChar, 'd', &smrt.inDoubleQuote) {
|
||||
return 5
|
||||
}
|
||||
}
|
||||
|
|
@ -181,7 +181,7 @@ func smartypants_cb__amp(ob *bytes.Buffer, smrt *smartypants_data, previous_char
|
|||
return 0
|
||||
}
|
||||
|
||||
func smartypants_cb__period(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
|
||||
func smartPeriod(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
|
||||
if len(text) >= 3 && text[1] == '.' && text[2] == '.' {
|
||||
ob.WriteString("…")
|
||||
return 2
|
||||
|
|
@ -196,13 +196,13 @@ func smartypants_cb__period(ob *bytes.Buffer, smrt *smartypants_data, previous_c
|
|||
return 0
|
||||
}
|
||||
|
||||
func smartypants_cb__backtick(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
|
||||
func smartBacktick(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
|
||||
if len(text) >= 2 && text[1] == '`' {
|
||||
next_char := byte(0)
|
||||
nextChar := byte(0)
|
||||
if len(text) >= 3 {
|
||||
next_char = text[2]
|
||||
nextChar = text[2]
|
||||
}
|
||||
if smartypants_quotes(ob, previous_char, next_char, 'd', &smrt.in_dquote) {
|
||||
if smartQuotesHelper(ob, previousChar, nextChar, 'd', &smrt.inDoubleQuote) {
|
||||
return 1
|
||||
}
|
||||
}
|
||||
|
|
@ -210,8 +210,8 @@ func smartypants_cb__backtick(ob *bytes.Buffer, smrt *smartypants_data, previous
|
|||
return 0
|
||||
}
|
||||
|
||||
func smartypants_cb__number_generic(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
|
||||
if word_boundary(previous_char) && len(text) >= 3 {
|
||||
func smartNumberGeneric(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
|
||||
if wordBoundary(previousChar) && len(text) >= 3 {
|
||||
// is it of the form digits/digits(word boundary)?, i.e., \d+/\d+\b
|
||||
num_end := 0
|
||||
for len(text) > num_end && isdigit(text[num_end]) {
|
||||
|
|
@ -233,7 +233,7 @@ func smartypants_cb__number_generic(ob *bytes.Buffer, smrt *smartypants_data, pr
|
|||
ob.WriteByte(text[0])
|
||||
return 0
|
||||
}
|
||||
if len(text) == den_end || word_boundary(text[den_end]) {
|
||||
if len(text) == den_end || wordBoundary(text[den_end]) {
|
||||
ob.WriteString("<sup>")
|
||||
ob.Write(text[:num_end])
|
||||
ob.WriteString("</sup>⁄<sub>")
|
||||
|
|
@ -247,24 +247,24 @@ func smartypants_cb__number_generic(ob *bytes.Buffer, smrt *smartypants_data, pr
|
|||
return 0
|
||||
}
|
||||
|
||||
func smartypants_cb__number(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
|
||||
if word_boundary(previous_char) && len(text) >= 3 {
|
||||
func smartNumber(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
|
||||
if wordBoundary(previousChar) && len(text) >= 3 {
|
||||
if text[0] == '1' && text[1] == '/' && text[2] == '2' {
|
||||
if len(text) < 4 || word_boundary(text[3]) {
|
||||
if len(text) < 4 || wordBoundary(text[3]) {
|
||||
ob.WriteString("½")
|
||||
return 2
|
||||
}
|
||||
}
|
||||
|
||||
if text[0] == '1' && text[1] == '/' && text[2] == '4' {
|
||||
if len(text) < 4 || word_boundary(text[3]) || (len(text) >= 5 && tolower(text[3]) == 't' && tolower(text[4]) == 'h') {
|
||||
if len(text) < 4 || wordBoundary(text[3]) || (len(text) >= 5 && tolower(text[3]) == 't' && tolower(text[4]) == 'h') {
|
||||
ob.WriteString("¼")
|
||||
return 2
|
||||
}
|
||||
}
|
||||
|
||||
if text[0] == '3' && text[1] == '/' && text[2] == '4' {
|
||||
if len(text) < 4 || word_boundary(text[3]) || (len(text) >= 6 && tolower(text[3]) == 't' && tolower(text[4]) == 'h' && tolower(text[5]) == 's') {
|
||||
if len(text) < 4 || wordBoundary(text[3]) || (len(text) >= 6 && tolower(text[3]) == 't' && tolower(text[4]) == 'h' && tolower(text[5]) == 's') {
|
||||
ob.WriteString("¾")
|
||||
return 2
|
||||
}
|
||||
|
|
@ -275,19 +275,19 @@ func smartypants_cb__number(ob *bytes.Buffer, smrt *smartypants_data, previous_c
|
|||
return 0
|
||||
}
|
||||
|
||||
func smartypants_cb__dquote(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
|
||||
next_char := byte(0)
|
||||
func smartDquote(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
|
||||
nextChar := byte(0)
|
||||
if len(text) > 1 {
|
||||
next_char = text[1]
|
||||
nextChar = text[1]
|
||||
}
|
||||
if !smartypants_quotes(ob, previous_char, next_char, 'd', &smrt.in_dquote) {
|
||||
if !smartQuotesHelper(ob, previousChar, nextChar, 'd', &smrt.inDoubleQuote) {
|
||||
ob.WriteString(""")
|
||||
}
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
func smartypants_cb__ltag(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int {
|
||||
func smartLtag(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
|
||||
i := 0
|
||||
|
||||
for i < len(text) && text[i] != '>' {
|
||||
|
|
@ -298,42 +298,42 @@ func smartypants_cb__ltag(ob *bytes.Buffer, smrt *smartypants_data, previous_cha
|
|||
return i
|
||||
}
|
||||
|
||||
type smartypants_cb func(ob *bytes.Buffer, smrt *smartypants_data, previous_char byte, text []byte) int
|
||||
type smartCallback func(ob *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int
|
||||
|
||||
type SmartypantsRenderer [256]smartypants_cb
|
||||
type SmartypantsRenderer [256]smartCallback
|
||||
|
||||
func Smartypants(flags int) *SmartypantsRenderer {
|
||||
r := new(SmartypantsRenderer)
|
||||
r['"'] = smartypants_cb__dquote
|
||||
r['&'] = smartypants_cb__amp
|
||||
r['\''] = smartypants_cb__squote
|
||||
r['('] = smartypants_cb__parens
|
||||
r['"'] = smartDquote
|
||||
r['&'] = smartAmp
|
||||
r['\''] = smartSquote
|
||||
r['('] = smartParens
|
||||
if flags&HTML_SMARTYPANTS_LATEX_DASHES == 0 {
|
||||
r['-'] = smartypants_cb__dash
|
||||
r['-'] = smartDash
|
||||
} else {
|
||||
r['-'] = smartypants_cb__dash_latex
|
||||
r['-'] = smartDashLatex
|
||||
}
|
||||
r['.'] = smartypants_cb__period
|
||||
r['.'] = smartPeriod
|
||||
if flags&HTML_SMARTYPANTS_FRACTIONS == 0 {
|
||||
r['1'] = smartypants_cb__number
|
||||
r['3'] = smartypants_cb__number
|
||||
r['1'] = smartNumber
|
||||
r['3'] = smartNumber
|
||||
} else {
|
||||
for ch := '1'; ch <= '9'; ch++ {
|
||||
r[ch] = smartypants_cb__number_generic
|
||||
r[ch] = smartNumberGeneric
|
||||
}
|
||||
}
|
||||
r['<'] = smartypants_cb__ltag
|
||||
r['`'] = smartypants_cb__backtick
|
||||
r['<'] = smartLtag
|
||||
r['`'] = smartBacktick
|
||||
return r
|
||||
}
|
||||
|
||||
func rndr_smartypants(ob *bytes.Buffer, text []byte, opaque interface{}) {
|
||||
func htmlSmartypants(ob *bytes.Buffer, text []byte, opaque interface{}) {
|
||||
options := opaque.(*htmlOptions)
|
||||
smrt := smartypants_data{false, false}
|
||||
smrt := smartypantsData{false, false}
|
||||
|
||||
// first do normal entity escaping
|
||||
escaped := bytes.NewBuffer(nil)
|
||||
attr_escape(escaped, text)
|
||||
attrEscape(escaped, text)
|
||||
text = escaped.Bytes()
|
||||
|
||||
mark := 0
|
||||
|
|
@ -343,11 +343,11 @@ func rndr_smartypants(ob *bytes.Buffer, text []byte, opaque interface{}) {
|
|||
ob.Write(text[mark:i])
|
||||
}
|
||||
|
||||
previous_char := byte(0)
|
||||
previousChar := byte(0)
|
||||
if i > 0 {
|
||||
previous_char = text[i-1]
|
||||
previousChar = text[i-1]
|
||||
}
|
||||
i += action(ob, &smrt, previous_char, text[i:])
|
||||
i += action(ob, &smrt, previousChar, text[i:])
|
||||
mark = i + 1
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user