Rewrite markdown rendering to blackfriday v2 and rewrite orgmode rendering to go-org (#8560)

* Rewrite markdown rendering to blackfriday v2.0

* Fix style

* Fix go mod with golang 1.13

* Fix blackfriday v2 import

* Inital orgmode renderer migration to go-org

* Vendor go-org dependency

* Ignore errors :/

* Update go-org to latest version

* Update test

* Fix go-org test

* Remove unneeded code

* Fix comments

* Fix markdown test

* Fix blackfriday regression rendering HTML block

go.mod

@@ -22,7 +22,6 @@ require (
 	github.com/blevesearch/go-porterstemmer v0.0.0-20141230013033-23a2c8e5cf1f // indirect
 	github.com/blevesearch/segment v0.0.0-20160105220820-db70c57796cc // indirect
 	github.com/boombuler/barcode v0.0.0-20161226211916-fe0f26ff6d26 // indirect
-	github.com/chaseadamsio/goorgeous v0.0.0-20170901132237-098da33fde5f
 	github.com/couchbase/vellum v0.0.0-20190111184608-e91b68ff3efe // indirect
 	github.com/cznic/b v0.0.0-20181122101859-a26611c4d92d // indirect
 	github.com/cznic/mathutil v0.0.0-20181122101859-297441e03548 // indirect
@@ -73,6 +72,7 @@ require (
 	github.com/mschoch/smat v0.0.0-20160514031455-90eadee771ae // indirect
 	github.com/msteinert/pam v0.0.0-20151204160544-02ccfbfaf0cc
 	github.com/nfnt/resize v0.0.0-20160724205520-891127d8d1b5
+	github.com/niklasfasching/go-org v0.1.7
 	github.com/oliamb/cutter v0.2.2
 	github.com/philhofer/fwd v1.0.0 // indirect
 	github.com/pkg/errors v0.8.1
@@ -80,12 +80,13 @@ require (
 	github.com/prometheus/client_golang v1.1.0
 	github.com/prometheus/procfs v0.0.4 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20190321074620-2f0d2b0e0001 // indirect
-	github.com/russross/blackfriday v0.0.0-20180428102519-11635eb403ff
+	github.com/russross/blackfriday v2.0.0+incompatible // indirect
+	github.com/russross/blackfriday/v2 v2.0.1
 	github.com/saintfish/chardet v0.0.0-20120816061221-3af4cd4741ca // indirect
 	github.com/satori/go.uuid v1.2.0
 	github.com/sergi/go-diff v1.0.0
 	github.com/shurcooL/httpfs v0.0.0-20190527155220-6a4d4a70508b // indirect
-	github.com/shurcooL/sanitized_anchor_name v0.0.0-20160918041101-1dba4b3954bc // indirect
+	github.com/shurcooL/sanitized_anchor_name v1.0.0 // indirect
 	github.com/shurcooL/vfsgen v0.0.0-20181202132449-6a9ea43bcacd
 	github.com/steveyen/gtreap v0.0.0-20150807155958-0abe01ef9be2 // indirect
 	github.com/stretchr/testify v1.4.0
@@ -100,7 +101,7 @@ require (
 	github.com/willf/bitset v0.0.0-20180426185212-8ce1146b8621 // indirect
 	github.com/yohcop/openid-go v0.0.0-20160914080427-2c050d2dae53
 	golang.org/x/crypto v0.0.0-20190927123631-a832865fa7ad
-	golang.org/x/net v0.0.0-20190909003024-a7b16738d86b
+	golang.org/x/net v0.0.0-20191028085509-fe3aa8a45271
 	golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45
 	golang.org/x/sys v0.0.0-20190910064555-bbd175535a8b
 	golang.org/x/text v0.3.2

go.sum

@@ -86,8 +86,6 @@ github.com/boombuler/barcode v0.0.0-20161226211916-fe0f26ff6d26/go.mod h1:paBWMc
 github.com/bradfitz/gomemcache v0.0.0-20190329173943-551aad21a668 h1:U/lr3Dgy4WK+hNk4tyD+nuGjpVLPEHuJSFXMw11/HPA=
 github.com/bradfitz/gomemcache v0.0.0-20190329173943-551aad21a668/go.mod h1:H0wQNHz2YrLsuXOZozoeDmnHXkNCRmMW0gwFWDfEZDA=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
-github.com/chaseadamsio/goorgeous v0.0.0-20170901132237-098da33fde5f h1:REH9VH5ubNR0skLaOxK7TRJeRbE2dDfvaouQo8FsRcA=
-github.com/chaseadamsio/goorgeous v0.0.0-20170901132237-098da33fde5f/go.mod h1:6QaC0vFoKWYDth94dHFNgRT2YkT5FHdQp/Yx15aAAi0=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/corbym/gocrest v1.0.3 h1:gwEdq6RkTmq+09CTuM29DfKOCtZ7G7bcyxs3IZ6EVdU=
 github.com/corbym/gocrest v1.0.3/go.mod h1:maVFL5lbdS2PgfOQgGRWDYTeunSWQeiEgoNdTABShCs=
@@ -425,6 +423,10 @@ github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRW
 github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/nfnt/resize v0.0.0-20160724205520-891127d8d1b5 h1:BvoENQQU+fZ9uukda/RzCAL/191HHwJA5b13R6diVlY=
 github.com/nfnt/resize v0.0.0-20160724205520-891127d8d1b5/go.mod h1:jpp1/29i3P1S/RLdc7JQKbRpFeM1dOBd8T9ki5s+AY8=
+github.com/niklasfasching/go-org v0.1.6 h1:F521WcqRNl8OJumlgAnekZgERaTA2HpfOYYfVEKOeI8=
+github.com/niklasfasching/go-org v0.1.6/go.mod h1:AsLD6X7djzRIz4/RFZu8vwRL0VGjUvGZCCH1Nz0VdrU=
+github.com/niklasfasching/go-org v0.1.7 h1:t3V+3XnS/7BhKv/7SlMUa8FvAiq577/a1T3D7mLIRXE=
+github.com/niklasfasching/go-org v0.1.7/go.mod h1:AsLD6X7djzRIz4/RFZu8vwRL0VGjUvGZCCH1Nz0VdrU=
 github.com/oklog/ulid v1.3.1/go.mod h1:CirwcVhetQ6Lv90oh/F+FBtV6XMibvdAFo93nm5qn4U=
 github.com/oliamb/cutter v0.2.2 h1:Lfwkya0HHNU1YLnGv2hTkzHfasrSMkgv4Dn+5rmlk3k=
 github.com/oliamb/cutter v0.2.2/go.mod h1:4BenG2/4GuRBDbVm/OPahDVqbrOemzpPiG5mi1iryBU=
@@ -487,8 +489,10 @@ github.com/remyoudompheng/bigfft v0.0.0-20190321074620-2f0d2b0e0001/go.mod h1:qq
 github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
 github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
-github.com/russross/blackfriday v0.0.0-20180428102519-11635eb403ff h1:g9ZlAHmkc/h5So+OjNCkZWh+FjuKEOOOoyRkqlGA8+c=
+github.com/russross/blackfriday v2.0.0+incompatible h1:cBXrhZNUf9C+La9/YpS+UHpUT8YD6Td9ZMSU9APFcsk=
-github.com/russross/blackfriday v0.0.0-20180428102519-11635eb403ff/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR/rfWxYHBV53g=
+github.com/russross/blackfriday v2.0.0+incompatible/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR/rfWxYHBV53g=
+github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
+github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/saintfish/chardet v0.0.0-20120816061221-3af4cd4741ca h1:NugYot0LIVPxTvN8n+Kvkn6TrbMyxQiuvKdEwFdR9vI=
 github.com/saintfish/chardet v0.0.0-20120816061221-3af4cd4741ca/go.mod h1:uugorj2VCxiV1x+LzaIdVa9b4S4qGAcH6cbhh4qVxOU=
 github.com/satori/go.uuid v1.2.0 h1:0uYX9dsZ2yD7q2RtLRtPSdGDWzjeM3TbMJP9utgA0ww=
@@ -499,6 +503,8 @@ github.com/shurcooL/httpfs v0.0.0-20190527155220-6a4d4a70508b h1:4kg1wyftSKxLtnP
 github.com/shurcooL/httpfs v0.0.0-20190527155220-6a4d4a70508b/go.mod h1:ZY1cvUeJuFPAdZ/B6v7RHavJWZn2YPVFQ1OSXhCGOkg=
 github.com/shurcooL/sanitized_anchor_name v0.0.0-20160918041101-1dba4b3954bc h1:3wIrJvFb3Pf6B/2mDBnN1G5IfUVev4X5apadQlWOczE=
 github.com/shurcooL/sanitized_anchor_name v0.0.0-20160918041101-1dba4b3954bc/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
+github.com/shurcooL/sanitized_anchor_name v1.0.0 h1:PdmoCO6wvbs+7yrJyMORt4/BmY5IYyJwS/kOiWx8mHo=
+github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
 github.com/shurcooL/vfsgen v0.0.0-20181202132449-6a9ea43bcacd h1:ug7PpSOB5RBPK1Kg6qskGBoP3Vnj/aNYFTznWvlkGo0=
 github.com/shurcooL/vfsgen v0.0.0-20181202132449-6a9ea43bcacd/go.mod h1:TrYk7fJVaAttu97ZZKrO9UbRa8izdowaMIZcxYMbVaw=
 github.com/siddontang/go v0.0.0-20180604090527-bdc77568d726/go.mod h1:3yhqj7WBBfRhbBlzyOC3gUxftwsU0u8gqevxwIHQpMw=
@@ -650,6 +656,8 @@ golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297 h1:k7pJ2yAPLPgbskkFdhRCsA77k
 golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190909003024-a7b16738d86b h1:XfVGCX+0T4WOStkaOsJRllbsiImhB2jgVBGc9L0lPGc=
 golang.org/x/net v0.0.0-20190909003024-a7b16738d86b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20191028085509-fe3aa8a45271 h1:N66aaryRB3Ax92gH0v3hp1QYZ3zWWCCUR/j8Ifh45Ss=
+golang.org/x/net v0.0.0-20191028085509-fe3aa8a45271/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/oauth2 v0.0.0-20180620175406-ef147856a6dd/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421 h1:Wo7BWFiOk0QRFMLYMqJGFMd9CgUAcGx7V+qEg/h5IBI=

modules/markup/html_test.go

@@ -323,6 +323,6 @@ func TestRender_ShortLinks(t *testing.T) {
 		`<p><a href="`+notencodedImgurlWiki+`" rel="nofollow"><img src="`+notencodedImgurlWiki+`"/></a></p>`)
 	test(
 		"<p><a href=\"https://example.org\">[[foobar]]</a></p>",
-		`<p><a href="https://example.org" rel="nofollow">[[foobar]]</a></p>`,
+		`<p></p><p><a href="https://example.org" rel="nofollow">[[foobar]]</a></p><p></p>`,
-		`<p><a href="https://example.org" rel="nofollow">[[foobar]]</a></p>`)
+		`<p></p><p><a href="https://example.org" rel="nofollow">[[foobar]]</a></p><p></p>`)
 }

modules/markup/markdown/markdown.go

@@ -7,13 +7,14 @@ package markdown
 
 import (
 	"bytes"
+	"io"
 	"strings"
 
 	"code.gitea.io/gitea/modules/markup"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/util"
 
-	"github.com/russross/blackfriday"
+	"github.com/russross/blackfriday/v2"
 )
 
 // Renderer is a extended version of underlying render object.
@@ -25,134 +26,138 @@ type Renderer struct {
 
 var byteMailto = []byte("mailto:")
 
-// Link defines how formal links should be processed to produce corresponding HTML elements.
+var htmlEscaper = [256][]byte{
-func (r *Renderer) Link(out *bytes.Buffer, link []byte, title []byte, content []byte) {
+	'&': []byte("&"),
-	// special case: this is not a link, a hash link or a mailto:, so it's a
+	'<': []byte("&lt;"),
-	// relative URL
+	'>': []byte("&gt;"),
-	if len(link) > 0 && !markup.IsLink(link) &&
+	'"': []byte("&quot;"),
-		link[0] != '#' && !bytes.HasPrefix(link, byteMailto) {
+}
-		lnk := string(link)
-		if r.IsWiki {
-			lnk = util.URLJoin("wiki", lnk)
-		}
-		mLink := util.URLJoin(r.URLPrefix, lnk)
-		link = []byte(mLink)
-	}
 
-	if len(content) > 10 && string(content[0:9]) == "<a href=\"" && bytes.Contains(content[9:], []byte("<img")) {
+func escapeHTML(w io.Writer, s []byte) {
-		// Image with link case: markdown `[![]()]()`
+	var start, end int
-		// If the content is an image, then we change the original href around it
+	for end < len(s) {
-		// which points to itself to a new address "link"
+		escSeq := htmlEscaper[s[end]]
-		rightQuote := bytes.Index(content[9:], []byte("\""))
+		if escSeq != nil {
-		content = bytes.Replace(content, content[9:9+rightQuote], link, 1)
+			_, _ = w.Write(s[start:end])
-		out.Write(content)
+			_, _ = w.Write(escSeq)
-	} else {
+			start = end + 1
-		r.Renderer.Link(out, link, title, content)
+		}
+		end++
+	}
+	if start < len(s) && end <= len(s) {
+		_, _ = w.Write(s[start:end])
 	}
 }
 
-// List renders markdown bullet or digit lists to HTML
+// RenderNode is a default renderer of a single node of a syntax tree. For
-func (r *Renderer) List(out *bytes.Buffer, text func() bool, flags int) {
+// block nodes it will be called twice: first time with entering=true, second
-	marker := out.Len()
+// time with entering=false, so that it could know when it's working on an open
-	if out.Len() > 0 {
+// tag and when on close. It writes the result to w.
-		out.WriteByte('\n')
+//
-	}
+// The return value is a way to tell the calling walker to adjust its walk
-
+// pattern: e.g. it can terminate the traversal by returning Terminate. Or it
-	if flags&blackfriday.LIST_TYPE_DEFINITION != 0 {
+// can ask the walker to skip a subtree of this node by returning SkipChildren.
-		out.WriteString("<dl>")
+// The typical behavior is to return GoToNext, which asks for the usual
-	} else if flags&blackfriday.LIST_TYPE_ORDERED != 0 {
+// traversal to the next node.
-		out.WriteString("<ol class='ui list'>")
+func (r *Renderer) RenderNode(w io.Writer, node *blackfriday.Node, entering bool) blackfriday.WalkStatus {
-	} else {
+	switch node.Type {
-		out.WriteString("<ul class='ui list'>")
+	case blackfriday.Image:
-	}
-	if !text() {
-		out.Truncate(marker)
-		return
-	}
-	if flags&blackfriday.LIST_TYPE_DEFINITION != 0 {
-		out.WriteString("</dl>\n")
-	} else if flags&blackfriday.LIST_TYPE_ORDERED != 0 {
-		out.WriteString("</ol>\n")
-	} else {
-		out.WriteString("</ul>\n")
-	}
-}
-
-// ListItem defines how list items should be processed to produce corresponding HTML elements.
-func (r *Renderer) ListItem(out *bytes.Buffer, text []byte, flags int) {
-	// Detect procedures to draw checkboxes.
-	prefix := ""
-	if bytes.HasPrefix(text, []byte("<p>")) {
-		prefix = "<p>"
-	}
-	switch {
-	case bytes.HasPrefix(text, []byte(prefix+"[ ] ")):
-		text = append([]byte(`<span class="ui fitted disabled checkbox"><input type="checkbox" disabled="disabled" /><label /></span>`), text[3+len(prefix):]...)
-		if prefix != "" {
-			text = bytes.Replace(text, []byte(prefix), []byte{}, 1)
-		}
-	case bytes.HasPrefix(text, []byte(prefix+"[x] ")):
-		text = append([]byte(`<span class="ui checked fitted disabled checkbox"><input type="checkbox" checked="" disabled="disabled" /><label /></span>`), text[3+len(prefix):]...)
-		if prefix != "" {
-			text = bytes.Replace(text, []byte(prefix), []byte{}, 1)
-		}
-	}
-	r.Renderer.ListItem(out, text, flags)
-}
-
-// Image defines how images should be processed to produce corresponding HTML elements.
-func (r *Renderer) Image(out *bytes.Buffer, link []byte, title []byte, alt []byte) {
 		prefix := r.URLPrefix
 		if r.IsWiki {
 			prefix = util.URLJoin(prefix, "wiki", "raw")
 		}
 		prefix = strings.Replace(prefix, "/src/", "/media/", 1)
+		link := node.LinkData.Destination
 		if len(link) > 0 && !markup.IsLink(link) {
 			lnk := string(link)
 			lnk = util.URLJoin(prefix, lnk)
 			lnk = strings.Replace(lnk, " ", "+", -1)
 			link = []byte(lnk)
 		}
-
+		node.LinkData.Destination = link
-	// Put a link around it pointing to itself by default
+		// Render link around image only if parent is not link already
-	out.WriteString(`<a href="`)
+		if node.Parent != nil && node.Parent.Type != blackfriday.Link {
-	out.Write(link)
+			if entering {
-	out.WriteString(`">`)
+				_, _ = w.Write([]byte(`<a href="`))
-	r.Renderer.Image(out, link, title, alt)
+				escapeHTML(w, link)
-	out.WriteString("</a>")
+				_, _ = w.Write([]byte(`">`))
+				return r.Renderer.RenderNode(w, node, entering)
+			}
+			s := r.Renderer.RenderNode(w, node, entering)
+			_, _ = w.Write([]byte(`</a>`))
+			return s
+		}
+		return r.Renderer.RenderNode(w, node, entering)
+	case blackfriday.Link:
+		// special case: this is not a link, a hash link or a mailto:, so it's a
+		// relative URL
+		link := node.LinkData.Destination
+		if len(link) > 0 && !markup.IsLink(link) &&
+			link[0] != '#' && !bytes.HasPrefix(link, byteMailto) &&
+			node.LinkData.Footnote == nil {
+			lnk := string(link)
+			if r.IsWiki {
+				lnk = util.URLJoin("wiki", lnk)
+			}
+			link = []byte(util.URLJoin(r.URLPrefix, lnk))
+		}
+		node.LinkData.Destination = link
+		return r.Renderer.RenderNode(w, node, entering)
+	case blackfriday.Text:
+		isListItem := false
+		for n := node.Parent; n != nil; n = n.Parent {
+			if n.Type == blackfriday.Item {
+				isListItem = true
+				break
+			}
+		}
+		if isListItem {
+			text := node.Literal
+			switch {
+			case bytes.HasPrefix(text, []byte("[ ] ")):
+				_, _ = w.Write([]byte(`<span class="ui fitted disabled checkbox"><input type="checkbox" disabled="disabled" /><label /></span>`))
+				text = text[3:]
+			case bytes.HasPrefix(text, []byte("[x] ")):
+				_, _ = w.Write([]byte(`<span class="ui checked fitted disabled checkbox"><input type="checkbox" checked="" disabled="disabled" /><label /></span>`))
+				text = text[3:]
+			}
+			node.Literal = text
+		}
+	}
+	return r.Renderer.RenderNode(w, node, entering)
 }
 
 const (
 	blackfridayExtensions = 0 |
-		blackfriday.EXTENSION_NO_INTRA_EMPHASIS |
+		blackfriday.NoIntraEmphasis |
-		blackfriday.EXTENSION_TABLES |
+		blackfriday.Tables |
-		blackfriday.EXTENSION_FENCED_CODE |
+		blackfriday.FencedCode |
-		blackfriday.EXTENSION_STRIKETHROUGH |
+		blackfriday.Strikethrough |
-		blackfriday.EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK |
+		blackfriday.NoEmptyLineBeforeBlock |
-		blackfriday.EXTENSION_DEFINITION_LISTS |
+		blackfriday.DefinitionLists |
-		blackfriday.EXTENSION_FOOTNOTES |
+		blackfriday.Footnotes |
-		blackfriday.EXTENSION_HEADER_IDS |
+		blackfriday.HeadingIDs |
-		blackfriday.EXTENSION_AUTO_HEADER_IDS
+		blackfriday.AutoHeadingIDs
 	blackfridayHTMLFlags = 0 |
-		blackfriday.HTML_SKIP_STYLE |
+		blackfriday.Smartypants
-		blackfriday.HTML_OMIT_CONTENTS |
-		blackfriday.HTML_USE_SMARTYPANTS
 )
 
 // RenderRaw renders Markdown to HTML without handling special links.
 func RenderRaw(body []byte, urlPrefix string, wikiMarkdown bool) []byte {
 	renderer := &Renderer{
-		Renderer:  blackfriday.HtmlRenderer(blackfridayHTMLFlags, "", ""),
+		Renderer: blackfriday.NewHTMLRenderer(blackfriday.HTMLRendererParameters{
+			Flags: blackfridayHTMLFlags,
+		}),
 		URLPrefix: urlPrefix,
 		IsWiki:    wikiMarkdown,
 	}
 
 	exts := blackfridayExtensions
 	if setting.Markdown.EnableHardLineBreak {
-		exts |= blackfriday.EXTENSION_HARD_LINE_BREAK
+		exts |= blackfriday.HardLineBreak
 	}
 
-	body = blackfriday.Markdown(body, renderer, exts)
+	body = blackfriday.Run(body, blackfriday.WithRenderer(renderer), blackfriday.WithExtensions(exts))
 	return markup.SanitizeBytes(body)
 }
 

modules/markup/markdown/markdown_test.go

@@ -166,13 +166,13 @@ func testAnswers(baseURLContent, baseURLImages string) []string {
 <h3 id="footnotes">Footnotes</h3>
 
 <p>Here is a simple footnote,<sup id="fnref:1"><a href="#fn:1" rel="nofollow">1</a></sup> and here is a longer one.<sup id="fnref:bignote"><a href="#fn:bignote" rel="nofollow">2</a></sup></p>
+
 <div>
 
 <hr/>
 
 <ol>
-<li id="fn:1">This is the first footnote.
+<li id="fn:1">This is the first footnote.</li>
-</li>
 
 <li id="fn:bignote"><p>Here is one with multiple paragraphs and code.</p>
 
@@ -180,9 +180,9 @@ func testAnswers(baseURLContent, baseURLImages string) []string {
 
 <p><code>{ my code }</code></p>
 
-<p>Add as many paragraphs as you like.</p>
+<p>Add as many paragraphs as you like.</p></li>
-</li>
 </ol>
+
 </div>
 `,
 	}

modules/markup/mdstripper/mdstripper.go

@@ -6,43 +6,39 @@ package mdstripper
 
 import (
 	"bytes"
+	"io"
 
-	"github.com/russross/blackfriday"
+	"github.com/russross/blackfriday/v2"
 )
 
 // MarkdownStripper extends blackfriday.Renderer
 type MarkdownStripper struct {
-	blackfriday.Renderer
 	links     []string
 	coallesce bool
+	empty     bool
 }
 
 const (
 	blackfridayExtensions = 0 |
-		blackfriday.EXTENSION_NO_INTRA_EMPHASIS |
+		blackfriday.NoIntraEmphasis |
-		blackfriday.EXTENSION_TABLES |
+		blackfriday.Tables |
-		blackfriday.EXTENSION_FENCED_CODE |
+		blackfriday.FencedCode |
-		blackfriday.EXTENSION_STRIKETHROUGH |
+		blackfriday.Strikethrough |
-		blackfriday.EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK |
+		blackfriday.NoEmptyLineBeforeBlock |
-		blackfriday.EXTENSION_DEFINITION_LISTS |
+		blackfriday.DefinitionLists |
-		blackfriday.EXTENSION_FOOTNOTES |
+		blackfriday.Footnotes |
-		blackfriday.EXTENSION_HEADER_IDS |
+		blackfriday.HeadingIDs |
-		blackfriday.EXTENSION_AUTO_HEADER_IDS |
+		blackfriday.AutoHeadingIDs |
 		// Not included in modules/markup/markdown/markdown.go;
 		// required here to process inline links
-		blackfriday.EXTENSION_AUTOLINK
+		blackfriday.Autolink
 )
 
-//revive:disable:var-naming Implementing the Rendering interface requires breaking some linting rules
-
 // StripMarkdown parses markdown content by removing all markup and code blocks
 //	in order to extract links and other references
 func StripMarkdown(rawBytes []byte) (string, []string) {
-	stripper := &MarkdownStripper{
+	buf, links := StripMarkdownBytes(rawBytes)
-		links: make([]string, 0, 10),
+	return string(buf), links
-	}
-	body := blackfriday.Markdown(rawBytes, stripper, blackfridayExtensions)
-	return string(body), stripper.GetLinks()
 }
 
 // StripMarkdownBytes parses markdown content by removing all markup and code blocks
@@ -50,205 +46,67 @@ func StripMarkdown(rawBytes []byte) (string, []string) {
 func StripMarkdownBytes(rawBytes []byte) ([]byte, []string) {
 	stripper := &MarkdownStripper{
 		links: make([]string, 0, 10),
+		empty: true,
 	}
-	body := blackfriday.Markdown(rawBytes, stripper, blackfridayExtensions)
+
-	return body, stripper.GetLinks()
+	parser := blackfriday.New(blackfriday.WithRenderer(stripper), blackfriday.WithExtensions(blackfridayExtensions))
+	ast := parser.Parse(rawBytes)
+	var buf bytes.Buffer
+	stripper.RenderHeader(&buf, ast)
+	ast.Walk(func(node *blackfriday.Node, entering bool) blackfriday.WalkStatus {
+		return stripper.RenderNode(&buf, node, entering)
+	})
+	stripper.RenderFooter(&buf, ast)
+	return buf.Bytes(), stripper.GetLinks()
 }
 
-// block-level callbacks
+// RenderNode is the main rendering method. It will be called once for
-
+// every leaf node and twice for every non-leaf node (first with
-// BlockCode dummy function to proceed with rendering
+// entering=true, then with entering=false). The method should write its
-func (r *MarkdownStripper) BlockCode(out *bytes.Buffer, text []byte, infoString string) {
+// rendition of the node to the supplied writer w.
-	// Not rendered
+func (r *MarkdownStripper) RenderNode(w io.Writer, node *blackfriday.Node, entering bool) blackfriday.WalkStatus {
+	if !entering {
+		return blackfriday.GoToNext
+	}
+	switch node.Type {
+	case blackfriday.Text:
+		r.processString(w, node.Literal, node.Parent == nil)
+		return blackfriday.GoToNext
+	case blackfriday.Link:
+		r.processLink(w, node.LinkData.Destination)
 		r.coallesce = false
-}
+		return blackfriday.SkipChildren
-
+	}
-// BlockQuote dummy function to proceed with rendering
-func (r *MarkdownStripper) BlockQuote(out *bytes.Buffer, text []byte) {
-	// FIXME: perhaps it's better to leave out block quote for this?
-	r.processString(out, text, false)
-}
-
-// BlockHtml dummy function to proceed with rendering
-func (r *MarkdownStripper) BlockHtml(out *bytes.Buffer, text []byte) { //nolint
-	// Not rendered
 	r.coallesce = false
+	return blackfriday.GoToNext
 }
 
-// Header dummy function to proceed with rendering
+// RenderHeader is a method that allows the renderer to produce some
-func (r *MarkdownStripper) Header(out *bytes.Buffer, text func() bool, level int, id string) {
+// content preceding the main body of the output document.
-	text()
+func (r *MarkdownStripper) RenderHeader(w io.Writer, ast *blackfriday.Node) {
-	r.coallesce = false
 }
 
-// HRule dummy function to proceed with rendering
+// RenderFooter is a symmetric counterpart of RenderHeader.
-func (r *MarkdownStripper) HRule(out *bytes.Buffer) {
+func (r *MarkdownStripper) RenderFooter(w io.Writer, ast *blackfriday.Node) {
-	// Not rendered
-	r.coallesce = false
 }
 
-// List dummy function to proceed with rendering
+func (r *MarkdownStripper) doubleSpace(w io.Writer) {
-func (r *MarkdownStripper) List(out *bytes.Buffer, text func() bool, flags int) {
+	if !r.empty {
-	text()
+		_, _ = w.Write([]byte{'\n'})
-	r.coallesce = false
-}
-
-// ListItem dummy function to proceed with rendering
-func (r *MarkdownStripper) ListItem(out *bytes.Buffer, text []byte, flags int) {
-	r.processString(out, text, false)
-}
-
-// Paragraph dummy function to proceed with rendering
-func (r *MarkdownStripper) Paragraph(out *bytes.Buffer, text func() bool) {
-	text()
-	r.coallesce = false
-}
-
-// Table dummy function to proceed with rendering
-func (r *MarkdownStripper) Table(out *bytes.Buffer, header []byte, body []byte, columnData []int) {
-	r.processString(out, header, false)
-	r.processString(out, body, false)
-}
-
-// TableRow dummy function to proceed with rendering
-func (r *MarkdownStripper) TableRow(out *bytes.Buffer, text []byte) {
-	r.processString(out, text, false)
-}
-
-// TableHeaderCell dummy function to proceed with rendering
-func (r *MarkdownStripper) TableHeaderCell(out *bytes.Buffer, text []byte, flags int) {
-	r.processString(out, text, false)
-}
-
-// TableCell dummy function to proceed with rendering
-func (r *MarkdownStripper) TableCell(out *bytes.Buffer, text []byte, flags int) {
-	r.processString(out, text, false)
-}
-
-// Footnotes dummy function to proceed with rendering
-func (r *MarkdownStripper) Footnotes(out *bytes.Buffer, text func() bool) {
-	text()
-}
-
-// FootnoteItem dummy function to proceed with rendering
-func (r *MarkdownStripper) FootnoteItem(out *bytes.Buffer, name, text []byte, flags int) {
-	r.processString(out, text, false)
-}
-
-// TitleBlock dummy function to proceed with rendering
-func (r *MarkdownStripper) TitleBlock(out *bytes.Buffer, text []byte) {
-	r.processString(out, text, false)
-}
-
-// Span-level callbacks
-
-// AutoLink dummy function to proceed with rendering
-func (r *MarkdownStripper) AutoLink(out *bytes.Buffer, link []byte, kind int) {
-	r.processLink(out, link, []byte{})
-}
-
-// CodeSpan dummy function to proceed with rendering
-func (r *MarkdownStripper) CodeSpan(out *bytes.Buffer, text []byte) {
-	// Not rendered
-	r.coallesce = false
-}
-
-// DoubleEmphasis dummy function to proceed with rendering
-func (r *MarkdownStripper) DoubleEmphasis(out *bytes.Buffer, text []byte) {
-	r.processString(out, text, false)
-}
-
-// Emphasis dummy function to proceed with rendering
-func (r *MarkdownStripper) Emphasis(out *bytes.Buffer, text []byte) {
-	r.processString(out, text, false)
-}
-
-// Image dummy function to proceed with rendering
-func (r *MarkdownStripper) Image(out *bytes.Buffer, link []byte, title []byte, alt []byte) {
-	// Not rendered
-	r.coallesce = false
-}
-
-// LineBreak dummy function to proceed with rendering
-func (r *MarkdownStripper) LineBreak(out *bytes.Buffer) {
-	// Not rendered
-	r.coallesce = false
-}
-
-// Link dummy function to proceed with rendering
-func (r *MarkdownStripper) Link(out *bytes.Buffer, link []byte, title []byte, content []byte) {
-	r.processLink(out, link, content)
-}
-
-// RawHtmlTag dummy function to proceed with rendering
-func (r *MarkdownStripper) RawHtmlTag(out *bytes.Buffer, tag []byte) { //nolint
-	// Not rendered
-	r.coallesce = false
-}
-
-// TripleEmphasis dummy function to proceed with rendering
-func (r *MarkdownStripper) TripleEmphasis(out *bytes.Buffer, text []byte) {
-	r.processString(out, text, false)
-}
-
-// StrikeThrough dummy function to proceed with rendering
-func (r *MarkdownStripper) StrikeThrough(out *bytes.Buffer, text []byte) {
-	r.processString(out, text, false)
-}
-
-// FootnoteRef dummy function to proceed with rendering
-func (r *MarkdownStripper) FootnoteRef(out *bytes.Buffer, ref []byte, id int) {
-	// Not rendered
-	r.coallesce = false
-}
-
-// Low-level callbacks
-
-// Entity dummy function to proceed with rendering
-func (r *MarkdownStripper) Entity(out *bytes.Buffer, entity []byte) {
-	// FIXME: literal entities are not parsed; perhaps they should
-	r.coallesce = false
-}
-
-// NormalText dummy function to proceed with rendering
-func (r *MarkdownStripper) NormalText(out *bytes.Buffer, text []byte) {
-	r.processString(out, text, true)
-}
-
-// Header and footer
-
-// DocumentHeader dummy function to proceed with rendering
-func (r *MarkdownStripper) DocumentHeader(out *bytes.Buffer) {
-	r.coallesce = false
-}
-
-// DocumentFooter dummy function to proceed with rendering
-func (r *MarkdownStripper) DocumentFooter(out *bytes.Buffer) {
-	r.coallesce = false
-}
-
-// GetFlags returns rendering flags
-func (r *MarkdownStripper) GetFlags() int {
-	return 0
-}
-
-//revive:enable:var-naming
-
-func doubleSpace(out *bytes.Buffer) {
-	if out.Len() > 0 {
-		out.WriteByte('\n')
 	}
 }
 
-func (r *MarkdownStripper) processString(out *bytes.Buffer, text []byte, coallesce bool) {
+func (r *MarkdownStripper) processString(w io.Writer, text []byte, coallesce bool) {
 	// Always break-up words
 	if !coallesce || !r.coallesce {
-		doubleSpace(out)
+		r.doubleSpace(w)
 	}
-	out.Write(text)
+	_, _ = w.Write(text)
 	r.coallesce = coallesce
+	r.empty = false
 }
-func (r *MarkdownStripper) processLink(out *bytes.Buffer, link []byte, content []byte) {
+
+func (r *MarkdownStripper) processLink(w io.Writer, link []byte) {
 	// Links are processed out of band
 	r.links = append(r.links, string(link))
 	r.coallesce = false

modules/markup/orgmode/orgmode.go

@@ -5,12 +5,16 @@
 package markup
 
 import (
+	"bytes"
+	"fmt"
+	"html"
+	"strings"
+
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/markup"
-	"code.gitea.io/gitea/modules/markup/markdown"
+	"code.gitea.io/gitea/modules/util"
 
-	"github.com/chaseadamsio/goorgeous"
+	"github.com/niklasfasching/go-org/org"
-	"github.com/russross/blackfriday"
 )
 
 func init() {
@@ -32,23 +36,23 @@ func (Parser) Extensions() []string {
 }
 
 // Render renders orgmode rawbytes to HTML
-func Render(rawBytes []byte, urlPrefix string, metas map[string]string, isWiki bool) (result []byte) {
+func Render(rawBytes []byte, urlPrefix string, metas map[string]string, isWiki bool) []byte {
-	defer func() {
+	htmlWriter := org.NewHTMLWriter()
-		if err := recover(); err != nil {
+
-			log.Error("Panic in orgmode.Render: %v Just returning the rawBytes", err)
+	renderer := &Renderer{
-			result = rawBytes
+		HTMLWriter: htmlWriter,
-		}
-	}()
-	htmlFlags := blackfriday.HTML_USE_XHTML
-	htmlFlags |= blackfriday.HTML_SKIP_STYLE
-	htmlFlags |= blackfriday.HTML_OMIT_CONTENTS
-	renderer := &markdown.Renderer{
-		Renderer:  blackfriday.HtmlRenderer(htmlFlags, "", ""),
 		URLPrefix:  urlPrefix,
 		IsWiki:     isWiki,
 	}
-	result = goorgeous.Org(rawBytes, renderer)
+
-	return
+	htmlWriter.ExtendingWriter = renderer
+
+	res, err := org.New().Silent().Parse(bytes.NewReader(rawBytes), "").Write(renderer)
+	if err != nil {
+		log.Error("Panic in orgmode.Render: %v Just returning the rawBytes", err)
+		return rawBytes
+	}
+	return []byte(res)
 }
 
 // RenderString reners orgmode string to HTML string
@@ -56,7 +60,63 @@ func RenderString(rawContent string, urlPrefix string, metas map[string]string,
 	return string(Render([]byte(rawContent), urlPrefix, metas, isWiki))
 }
 
-// Render implements markup.Parser
+// Render reners orgmode string to HTML string
 func (Parser) Render(rawBytes []byte, urlPrefix string, metas map[string]string, isWiki bool) []byte {
 	return Render(rawBytes, urlPrefix, metas, isWiki)
 }
+
+// Renderer implements org.Writer
+type Renderer struct {
+	*org.HTMLWriter
+	URLPrefix string
+	IsWiki    bool
+}
+
+var byteMailto = []byte("mailto:")
+
+// WriteRegularLink renders images, links or videos
+func (r *Renderer) WriteRegularLink(l org.RegularLink) {
+	link := []byte(html.EscapeString(l.URL))
+	if l.Protocol == "file" {
+		link = link[len("file:"):]
+	}
+	if len(link) > 0 && !markup.IsLink(link) &&
+		link[0] != '#' && !bytes.HasPrefix(link, byteMailto) {
+		lnk := string(link)
+		if r.IsWiki {
+			lnk = util.URLJoin("wiki", lnk)
+		}
+		link = []byte(util.URLJoin(r.URLPrefix, lnk))
+	}
+
+	description := string(link)
+	if l.Description != nil {
+		description = r.nodesAsString(l.Description...)
+	}
+	switch l.Kind() {
+	case "image":
+		r.WriteString(fmt.Sprintf(`<img src="%s" alt="%s" title="%s" />`, link, description, description))
+	case "video":
+		r.WriteString(fmt.Sprintf(`<video src="%s" title="%s">%s</video>`, link, description, description))
+	default:
+		r.WriteString(fmt.Sprintf(`<a href="%s" title="%s">%s</a>`, link, description, description))
+	}
+}
+
+func (r *Renderer) emptyClone() *Renderer {
+	wcopy := *(r.HTMLWriter)
+	wcopy.Builder = strings.Builder{}
+
+	rcopy := *r
+	rcopy.HTMLWriter = &wcopy
+
+	wcopy.ExtendingWriter = &rcopy
+
+	return &rcopy
+}
+
+func (r *Renderer) nodesAsString(nodes ...org.Node) string {
+	tmp := r.emptyClone()
+	org.WriteNodes(tmp, nodes...)
+	return tmp.String()
+}

modules/markup/orgmode/orgmode_test.go

@@ -27,12 +27,12 @@ func TestRender_StandardLinks(t *testing.T) {
 		assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(buffer))
 	}
 
-	googleRendered := `<p><a href="https://google.com/" title="https://google.com/">https://google.com/</a></p>`
+	googleRendered := "<p>\n<a href=\"https://google.com/\" title=\"https://google.com/\">https://google.com/</a>\n</p>"
 	test("[[https://google.com/]]", googleRendered)
 
 	lnk := util.URLJoin(AppSubURL, "WikiPage")
 	test("[[WikiPage][WikiPage]]",
-		`<p><a href="`+lnk+`" title="WikiPage">WikiPage</a></p>`)
+		"<p>\n<a href=\""+lnk+"\" title=\"WikiPage\">WikiPage</a>\n</p>")
 }
 
 func TestRender_Images(t *testing.T) {
@@ -45,10 +45,8 @@ func TestRender_Images(t *testing.T) {
 	}
 
 	url := "../../.images/src/02/train.jpg"
-	title := "Train"
 	result := util.URLJoin(AppSubURL, url)
 
-	test(
+	test("[[file:"+url+"]]",
-		"[[file:"+url+"]["+title+"]]",
+		"<p>\n<img src=\""+result+"\" alt=\""+result+"\" title=\""+result+"\" />\n</p>")
-		`<p><a href="`+result+`"><img src="`+result+`" alt="`+title+`" title="`+title+`" /></a></p>`)
 }

vendor/github.com/chaseadamsio/goorgeous/.gitignore

@@ -1 +0,0 @@
-.DS_Store

vendor/github.com/chaseadamsio/goorgeous/.travis.yml

@@ -1,12 +0,0 @@
-language: go
-
-go:
-  - 1.7
-
-before_install:
-  - go get golang.org/x/tools/cmd/cover
-  - go get github.com/mattn/goveralls
-
-script:
-  - go test -v -covermode=count -coverprofile=coverage.out
-  - $HOME/gopath/bin/goveralls -coverprofile=coverage.out -service=travis-ci

vendor/github.com/chaseadamsio/goorgeous/README.org

@@ -1,66 +0,0 @@
-#+TITLE: chaseadamsio/goorgeous
-
-[[https://travis-ci.org/chaseadamsio/goorgeous.svg?branch=master]]
-[[https://coveralls.io/repos/github/chaseadamsio/goorgeous/badge.svg?branch=master]]
-
-/goorgeous is a Go Org to HTML Parser./
-
-[[file:gopher_small.gif]] 
-
-*Pronounced: Go? Org? Yes!*
-
-#+BEGIN_QUOTE
-"Org mode is for keeping notes, maintaining TODO lists, planning projects, and authoring documents with a fast and effective plain-text system."
-
-- [[orgmode.org]]
-#+END_QUOTE
-
-The purpose of this package is to come as close as possible as parsing an =*.org= document into HTML, the same way one might publish [[http://orgmode.org/worg/org-tutorials/org-publish-html-tutorial.html][with org-publish-html from Emacs]]. 
-
-* Installation
-
-#+BEGIN_SRC sh
-  go get -u github.com/chaseadamsio/goorgeous
-#+END_SRC
-
-* Usage
-
-** Org Headers
-
-To retrieve the headers from a =[]byte=, call =OrgHeaders= and it will return a =map[string]interface{}=: 
-
-#+BEGIN_SRC go
-  input := "#+title: goorgeous\n* Some Headline\n"
-  out := goorgeous.OrgHeaders(input) 
-#+END_SRC
-
-#+BEGIN_SRC go
-  map[string]interface{}{ 
-          "title": "goorgeous"
-  }
-#+END_SRC
-
-** Org Content
-
-After importing =github.com/chaseadamsio/goorgeous=, you can call =Org= with a =[]byte= and it will return an =html= version of the content as a =[]byte=
-
-#+BEGIN_SRC go
-  input := "#+TITLE: goorgeous\n* Some Headline\n"
-  out := goorgeous.Org(input) 
-#+END_SRC
-
-=out= will be:
-
-#+BEGIN_SRC html
-  <h1>Some Headline</h1>/n
-#+END_SRC
-
-* Why? 
-
-First off, I've become an unapologetic user of Emacs & ever since finding =org-mode= I use it for anything having to do with writing content, organizing my life and keeping documentation of my days/weeks/months.
-
-Although I like Emacs & =emacs-lisp=, I publish all of my html sites with [[https://gohugo.io][Hugo Static Site Generator]] and wanted to be able to write my content in =org-mode= in Emacs rather than markdown.
-
-Hugo's implementation of templating and speed are unmatched, so the only way I knew for sure I could continue to use Hugo and write in =org-mode= seamlessly was to write a golang parser for org content and submit a PR for Hugo to use it.
-* Acknowledgements
-I leaned heavily on russross' [[https://github.com/russross/blackfriday][blackfriday markdown renderer]] as both an example of how to write a parser (with some updates to leverage the go we know today) and reusing the blackfriday HTML Renderer so I didn't have to write my own!

vendor/github.com/chaseadamsio/goorgeous/goorgeous.go

@@ -1,803 +0,0 @@
-package goorgeous
-
-import (
-	"bufio"
-	"bytes"
-	"regexp"
-
-	"github.com/russross/blackfriday"
-	"github.com/shurcooL/sanitized_anchor_name"
-)
-
-type inlineParser func(p *parser, out *bytes.Buffer, data []byte, offset int) int
-
-type footnotes struct {
-	id  string
-	def string
-}
-
-type parser struct {
-	r              blackfriday.Renderer
-	inlineCallback [256]inlineParser
-	notes          []footnotes
-}
-
-// NewParser returns a new parser with the inlineCallbacks required for org content
-func NewParser(renderer blackfriday.Renderer) *parser {
-	p := new(parser)
-	p.r = renderer
-
-	p.inlineCallback['='] = generateVerbatim
-	p.inlineCallback['~'] = generateCode
-	p.inlineCallback['/'] = generateEmphasis
-	p.inlineCallback['_'] = generateUnderline
-	p.inlineCallback['*'] = generateBold
-	p.inlineCallback['+'] = generateStrikethrough
-	p.inlineCallback['['] = generateLinkOrImg
-
-	return p
-}
-
-// OrgCommon is the easiest way to parse a byte slice of org content and makes assumptions
-// that the caller wants to use blackfriday's HTMLRenderer with XHTML
-func OrgCommon(input []byte) []byte {
-	renderer := blackfriday.HtmlRenderer(blackfriday.HTML_USE_XHTML, "", "")
-	return OrgOptions(input, renderer)
-}
-
-// Org is a convenience name for OrgOptions
-func Org(input []byte, renderer blackfriday.Renderer) []byte {
-	return OrgOptions(input, renderer)
-}
-
-// OrgOptions takes an org content byte slice and a renderer to use
-func OrgOptions(input []byte, renderer blackfriday.Renderer) []byte {
-	// in the case that we need to render something in isEmpty but there isn't a new line char
-	input = append(input, '\n')
-	var output bytes.Buffer
-
-	p := NewParser(renderer)
-
-	scanner := bufio.NewScanner(bytes.NewReader(input))
-	// used to capture code blocks
-	marker := ""
-	syntax := ""
-	listType := ""
-	inParagraph := false
-	inList := false
-	inTable := false
-	inFixedWidthArea := false
-	var tmpBlock bytes.Buffer
-
-	for scanner.Scan() {
-		data := scanner.Bytes()
-
-		if !isEmpty(data) && isComment(data) || IsKeyword(data) {
-			switch {
-			case inList:
-				if tmpBlock.Len() > 0 {
-					p.generateList(&output, tmpBlock.Bytes(), listType)
-				}
-				inList = false
-				listType = ""
-				tmpBlock.Reset()
-			case inTable:
-				if tmpBlock.Len() > 0 {
-					p.generateTable(&output, tmpBlock.Bytes())
-				}
-				inTable = false
-				tmpBlock.Reset()
-			case inParagraph:
-				if tmpBlock.Len() > 0 {
-					p.generateParagraph(&output, tmpBlock.Bytes()[:len(tmpBlock.Bytes())-1])
-				}
-				inParagraph = false
-				tmpBlock.Reset()
-			case inFixedWidthArea:
-				if tmpBlock.Len() > 0 {
-					tmpBlock.WriteString("</pre>\n")
-					output.Write(tmpBlock.Bytes())
-				}
-				inFixedWidthArea = false
-				tmpBlock.Reset()
-			}
-
-		}
-
-		switch {
-		case isEmpty(data):
-			switch {
-			case inList:
-				if tmpBlock.Len() > 0 {
-					p.generateList(&output, tmpBlock.Bytes(), listType)
-				}
-				inList = false
-				listType = ""
-				tmpBlock.Reset()
-			case inTable:
-				if tmpBlock.Len() > 0 {
-					p.generateTable(&output, tmpBlock.Bytes())
-				}
-				inTable = false
-				tmpBlock.Reset()
-			case inParagraph:
-				if tmpBlock.Len() > 0 {
-					p.generateParagraph(&output, tmpBlock.Bytes()[:len(tmpBlock.Bytes())-1])
-				}
-				inParagraph = false
-				tmpBlock.Reset()
-			case inFixedWidthArea:
-				if tmpBlock.Len() > 0 {
-					tmpBlock.WriteString("</pre>\n")
-					output.Write(tmpBlock.Bytes())
-				}
-				inFixedWidthArea = false
-				tmpBlock.Reset()
-			case marker != "":
-				tmpBlock.WriteByte('\n')
-			default:
-				continue
-			}
-		case isPropertyDrawer(data) || marker == "PROPERTIES":
-			if marker == "" {
-				marker = "PROPERTIES"
-			}
-			if bytes.Equal(data, []byte(":END:")) {
-				marker = ""
-			}
-			continue
-		case isBlock(data) || marker != "":
-			matches := reBlock.FindSubmatch(data)
-			if len(matches) > 0 {
-				if string(matches[1]) == "END" {
-					switch marker {
-					case "QUOTE":
-						var tmpBuf bytes.Buffer
-						p.inline(&tmpBuf, tmpBlock.Bytes())
-						p.r.BlockQuote(&output, tmpBuf.Bytes())
-					case "CENTER":
-						var tmpBuf bytes.Buffer
-						output.WriteString("<center>\n")
-						p.inline(&tmpBuf, tmpBlock.Bytes())
-						output.Write(tmpBuf.Bytes())
-						output.WriteString("</center>\n")
-					default:
-						tmpBlock.WriteByte('\n')
-						p.r.BlockCode(&output, tmpBlock.Bytes(), syntax)
-					}
-					marker = ""
-					tmpBlock.Reset()
-					continue
-				}
-
-			}
-			if marker != "" {
-				if marker != "SRC" && marker != "EXAMPLE" {
-					var tmpBuf bytes.Buffer
-					tmpBuf.Write([]byte("<p>\n"))
-					p.inline(&tmpBuf, data)
-					tmpBuf.WriteByte('\n')
-					tmpBuf.Write([]byte("</p>\n"))
-					tmpBlock.Write(tmpBuf.Bytes())
-
-				} else {
-					tmpBlock.WriteByte('\n')
-					tmpBlock.Write(data)
-				}
-
-			} else {
-				marker = string(matches[2])
-				syntax = string(matches[3])
-			}
-		case isFootnoteDef(data):
-			matches := reFootnoteDef.FindSubmatch(data)
-			for i := range p.notes {
-				if p.notes[i].id == string(matches[1]) {
-					p.notes[i].def = string(matches[2])
-				}
-			}
-		case isTable(data):
-			if inTable != true {
-				inTable = true
-			}
-			tmpBlock.Write(data)
-			tmpBlock.WriteByte('\n')
-		case IsKeyword(data):
-			continue
-		case isComment(data):
-			p.generateComment(&output, data)
-		case isHeadline(data):
-			p.generateHeadline(&output, data)
-		case isDefinitionList(data):
-			if inList != true {
-				listType = "dl"
-				inList = true
-			}
-			var work bytes.Buffer
-			flags := blackfriday.LIST_TYPE_DEFINITION
-			matches := reDefinitionList.FindSubmatch(data)
-			flags |= blackfriday.LIST_TYPE_TERM
-			p.inline(&work, matches[1])
-			p.r.ListItem(&tmpBlock, work.Bytes(), flags)
-			work.Reset()
-			flags &= ^blackfriday.LIST_TYPE_TERM
-			p.inline(&work, matches[2])
-			p.r.ListItem(&tmpBlock, work.Bytes(), flags)
-		case isUnorderedList(data):
-			if inList != true {
-				listType = "ul"
-				inList = true
-			}
-			matches := reUnorderedList.FindSubmatch(data)
-			var work bytes.Buffer
-			p.inline(&work, matches[2])
-			p.r.ListItem(&tmpBlock, work.Bytes(), 0)
-		case isOrderedList(data):
-			if inList != true {
-				listType = "ol"
-				inList = true
-			}
-			matches := reOrderedList.FindSubmatch(data)
-			var work bytes.Buffer
-			tmpBlock.WriteString("<li")
-			if len(matches[2]) > 0 {
-				tmpBlock.WriteString(" value=\"")
-				tmpBlock.Write(matches[2])
-				tmpBlock.WriteString("\"")
-				matches[3] = matches[3][1:]
-			}
-			p.inline(&work, matches[3])
-			tmpBlock.WriteString(">")
-			tmpBlock.Write(work.Bytes())
-			tmpBlock.WriteString("</li>\n")
-		case isHorizontalRule(data):
-			p.r.HRule(&output)
-		case isExampleLine(data):
-			if inParagraph == true {
-				if len(tmpBlock.Bytes()) > 0 {
-					p.generateParagraph(&output, tmpBlock.Bytes()[:len(tmpBlock.Bytes())-1])
-					inParagraph = false
-				}
-				tmpBlock.Reset()
-			}
-			if inFixedWidthArea != true {
-				tmpBlock.WriteString("<pre class=\"example\">\n")
-				inFixedWidthArea = true
-			}
-			matches := reExampleLine.FindSubmatch(data)
-			tmpBlock.Write(matches[1])
-			tmpBlock.WriteString("\n")
-			break
-		default:
-			if inParagraph == false {
-				inParagraph = true
-				if inFixedWidthArea == true {
-					if tmpBlock.Len() > 0 {
-						tmpBlock.WriteString("</pre>")
-						output.Write(tmpBlock.Bytes())
-					}
-					inFixedWidthArea = false
-					tmpBlock.Reset()
-				}
-			}
-			tmpBlock.Write(data)
-			tmpBlock.WriteByte('\n')
-		}
-	}
-
-	if len(tmpBlock.Bytes()) > 0 {
-		if inParagraph == true {
-			p.generateParagraph(&output, tmpBlock.Bytes()[:len(tmpBlock.Bytes())-1])
-		} else if inFixedWidthArea == true {
-			tmpBlock.WriteString("</pre>\n")
-			output.Write(tmpBlock.Bytes())
-		}
-	}
-
-	// Writing footnote def. list
-	if len(p.notes) > 0 {
-		flags := blackfriday.LIST_ITEM_BEGINNING_OF_LIST
-		p.r.Footnotes(&output, func() bool {
-			for i := range p.notes {
-				p.r.FootnoteItem(&output, []byte(p.notes[i].id), []byte(p.notes[i].def), flags)
-			}
-			return true
-		})
-	}
-
-	return output.Bytes()
-}
-
-// Org Syntax has been broken up into 4 distinct sections based on
-// the org-syntax draft (http://orgmode.org/worg/dev/org-syntax.html):
-// - Headlines
-// - Greater Elements
-// - Elements
-// - Objects
-
-// Headlines
-func isHeadline(data []byte) bool {
-	if !charMatches(data[0], '*') {
-		return false
-	}
-	level := 0
-	for level < 6 && charMatches(data[level], '*') {
-		level++
-	}
-	return charMatches(data[level], ' ')
-}
-
-func (p *parser) generateHeadline(out *bytes.Buffer, data []byte) {
-	level := 1
-	status := ""
-	priority := ""
-
-	for level < 6 && data[level] == '*' {
-		level++
-	}
-
-	start := skipChar(data, level, ' ')
-
-	data = data[start:]
-	i := 0
-
-	// Check if has a status so it can be rendered as a separate span that can be hidden or
-	// modified with CSS classes
-	if hasStatus(data[i:4]) {
-		status = string(data[i:4])
-		i += 5 // one extra character for the next whitespace
-	}
-
-	// Check if the next byte is a priority marker
-	if data[i] == '[' && hasPriority(data[i+1]) {
-		priority = string(data[i+1])
-		i += 4 // for "[c]" + ' '
-	}
-
-	tags, tagsFound := findTags(data, i)
-
-	headlineID := sanitized_anchor_name.Create(string(data[i:]))
-
-	generate := func() bool {
-		dataEnd := len(data)
-		if tagsFound > 0 {
-			dataEnd = tagsFound
-		}
-
-		headline := bytes.TrimRight(data[i:dataEnd], " \t")
-
-		if status != "" {
-			out.WriteString("<span class=\"todo " + status + "\">" + status + "</span>")
-			out.WriteByte(' ')
-		}
-
-		if priority != "" {
-			out.WriteString("<span class=\"priority " + priority + "\">[" + priority + "]</span>")
-			out.WriteByte(' ')
-		}
-
-		p.inline(out, headline)
-
-		if tagsFound > 0 {
-			for _, tag := range tags {
-				out.WriteByte(' ')
-				out.WriteString("<span class=\"tags " + tag + "\">" + tag + "</span>")
-				out.WriteByte(' ')
-			}
-		}
-		return true
-	}
-
-	p.r.Header(out, generate, level, headlineID)
-}
-
-func hasStatus(data []byte) bool {
-	return bytes.Contains(data, []byte("TODO")) || bytes.Contains(data, []byte("DONE"))
-}
-
-func hasPriority(char byte) bool {
-	return (charMatches(char, 'A') || charMatches(char, 'B') || charMatches(char, 'C'))
-}
-
-func findTags(data []byte, start int) ([]string, int) {
-	tags := []string{}
-	tagOpener := 0
-	tagMarker := tagOpener
-	for tIdx := start; tIdx < len(data); tIdx++ {
-		if tagMarker > 0 && data[tIdx] == ':' {
-			tags = append(tags, string(data[tagMarker+1:tIdx]))
-			tagMarker = tIdx
-		}
-		if data[tIdx] == ':' && tagOpener == 0 && data[tIdx-1] == ' ' {
-			tagMarker = tIdx
-			tagOpener = tIdx
-		}
-	}
-	return tags, tagOpener
-}
-
-// Greater Elements
-// ~~ Definition Lists
-var reDefinitionList = regexp.MustCompile(`^\s*-\s+(.+?)\s+::\s+(.*)`)
-
-func isDefinitionList(data []byte) bool {
-	return reDefinitionList.Match(data)
-}
-
-// ~~ Example lines
-var reExampleLine = regexp.MustCompile(`^\s*:\s(\s*.*)|^\s*:$`)
-
-func isExampleLine(data []byte) bool {
-	return reExampleLine.Match(data)
-}
-
-// ~~ Ordered Lists
-var reOrderedList = regexp.MustCompile(`^(\s*)\d+\.\s+\[?@?(\d*)\]?(.+)`)
-
-func isOrderedList(data []byte) bool {
-	return reOrderedList.Match(data)
-}
-
-// ~~ Unordered Lists
-var reUnorderedList = regexp.MustCompile(`^(\s*)[-\+]\s+(.+)`)
-
-func isUnorderedList(data []byte) bool {
-	return reUnorderedList.Match(data)
-}
-
-// ~~ Tables
-var reTableHeaders = regexp.MustCompile(`^[|+-]*$`)
-
-func isTable(data []byte) bool {
-	return charMatches(data[0], '|')
-}
-
-func (p *parser) generateTable(output *bytes.Buffer, data []byte) {
-	var table bytes.Buffer
-	rows := bytes.Split(bytes.Trim(data, "\n"), []byte("\n"))
-	hasTableHeaders := len(rows) > 1
-	if len(rows) > 1 {
-		hasTableHeaders = reTableHeaders.Match(rows[1])
-	}
-	tbodySet := false
-
-	for idx, row := range rows {
-		var rowBuff bytes.Buffer
-		if hasTableHeaders && idx == 0 {
-			table.WriteString("<thead>")
-			for _, cell := range bytes.Split(row[1:len(row)-1], []byte("|")) {
-				p.r.TableHeaderCell(&rowBuff, bytes.Trim(cell, " \t"), 0)
-			}
-			p.r.TableRow(&table, rowBuff.Bytes())
-			table.WriteString("</thead>\n")
-		} else if hasTableHeaders && idx == 1 {
-			continue
-		} else {
-			if !tbodySet {
-				table.WriteString("<tbody>")
-				tbodySet = true
-			}
-			if !reTableHeaders.Match(row) {
-				for _, cell := range bytes.Split(row[1:len(row)-1], []byte("|")) {
-					var cellBuff bytes.Buffer
-					p.inline(&cellBuff, bytes.Trim(cell, " \t"))
-					p.r.TableCell(&rowBuff, cellBuff.Bytes(), 0)
-				}
-				p.r.TableRow(&table, rowBuff.Bytes())
-			}
-			if tbodySet && idx == len(rows)-1 {
-				table.WriteString("</tbody>\n")
-				tbodySet = false
-			}
-		}
-	}
-
-	output.WriteString("\n<table>\n")
-	output.Write(table.Bytes())
-	output.WriteString("</table>\n")
-}
-
-// ~~ Property Drawers
-
-func isPropertyDrawer(data []byte) bool {
-	return bytes.Equal(data, []byte(":PROPERTIES:"))
-}
-
-// ~~ Dynamic Blocks
-var reBlock = regexp.MustCompile(`^#\+(BEGIN|END)_(\w+)\s*([0-9A-Za-z_\-]*)?`)
-
-func isBlock(data []byte) bool {
-	return reBlock.Match(data)
-}
-
-// ~~ Footnotes
-var reFootnoteDef = regexp.MustCompile(`^\[fn:([\w]+)\] +(.+)`)
-
-func isFootnoteDef(data []byte) bool {
-	return reFootnoteDef.Match(data)
-}
-
-// Elements
-// ~~ Keywords
-func IsKeyword(data []byte) bool {
-	return len(data) > 2 && charMatches(data[0], '#') && charMatches(data[1], '+') && !charMatches(data[2], ' ')
-}
-
-// ~~ Comments
-func isComment(data []byte) bool {
-	return charMatches(data[0], '#') && charMatches(data[1], ' ')
-}
-
-func (p *parser) generateComment(out *bytes.Buffer, data []byte) {
-	var work bytes.Buffer
-	work.WriteString("<!-- ")
-	work.Write(data[2:])
-	work.WriteString(" -->")
-	work.WriteByte('\n')
-	out.Write(work.Bytes())
-}
-
-// ~~ Horizontal Rules
-var reHorizontalRule = regexp.MustCompile(`^\s*?-----\s?$`)
-
-func isHorizontalRule(data []byte) bool {
-	return reHorizontalRule.Match(data)
-}
-
-// ~~ Paragraphs
-func (p *parser) generateParagraph(out *bytes.Buffer, data []byte) {
-	generate := func() bool {
-		p.inline(out, bytes.Trim(data, " "))
-		return true
-	}
-	p.r.Paragraph(out, generate)
-}
-
-func (p *parser) generateList(output *bytes.Buffer, data []byte, listType string) {
-	generateList := func() bool {
-		output.WriteByte('\n')
-		p.inline(output, bytes.Trim(data, " "))
-		return true
-	}
-	switch listType {
-	case "ul":
-		p.r.List(output, generateList, 0)
-	case "ol":
-		p.r.List(output, generateList, blackfriday.LIST_TYPE_ORDERED)
-	case "dl":
-		p.r.List(output, generateList, blackfriday.LIST_TYPE_DEFINITION)
-	}
-}
-
-// Objects
-
-func (p *parser) inline(out *bytes.Buffer, data []byte) {
-	i, end := 0, 0
-
-	for i < len(data) {
-		for end < len(data) && p.inlineCallback[data[end]] == nil {
-			end++
-		}
-
-		p.r.Entity(out, data[i:end])
-
-		if end >= len(data) {
-			break
-		}
-		i = end
-
-		handler := p.inlineCallback[data[i]]
-
-		if consumed := handler(p, out, data, i); consumed > 0 {
-			i += consumed
-			end = i
-			continue
-		}
-
-		end = i + 1
-	}
-}
-
-func isAcceptablePreOpeningChar(dataIn, data []byte, offset int) bool {
-	if len(dataIn) == len(data) {
-		return true
-	}
-
-	char := dataIn[offset-1]
-	return charMatches(char, ' ') || isPreChar(char)
-}
-
-func isPreChar(char byte) bool {
-	return charMatches(char, '>') || charMatches(char, '(') || charMatches(char, '{') || charMatches(char, '[')
-}
-
-func isAcceptablePostClosingChar(char byte) bool {
-	return charMatches(char, ' ') || isTerminatingChar(char)
-}
-
-func isTerminatingChar(char byte) bool {
-	return charMatches(char, '.') || charMatches(char, ',') || charMatches(char, '?') || charMatches(char, '!') || charMatches(char, ')') || charMatches(char, '}') || charMatches(char, ']')
-}
-
-func findLastCharInInline(data []byte, char byte) int {
-	timesFound := 0
-	last := 0
-	// Start from character after the inline indicator
-	for i := 1; i < len(data); i++ {
-		if timesFound == 1 {
-			break
-		}
-		if data[i] == char {
-			if len(data) == i+1 || (len(data) > i+1 && isAcceptablePostClosingChar(data[i+1])) {
-				last = i
-				timesFound += 1
-			}
-		}
-	}
-	return last
-}
-
-func generator(p *parser, out *bytes.Buffer, dataIn []byte, offset int, char byte, doInline bool, renderer func(*bytes.Buffer, []byte)) int {
-	data := dataIn[offset:]
-	c := byte(char)
-	start := 1
-	i := start
-	if len(data) <= 1 {
-		return 0
-	}
-
-	lastCharInside := findLastCharInInline(data, c)
-
-	// Org mode spec says a non-whitespace character must immediately follow.
-	// if the current char is the marker, then there's no text between, not a candidate
-	if isSpace(data[i]) || lastCharInside == i || !isAcceptablePreOpeningChar(dataIn, data, offset) {
-		return 0
-	}
-
-	if lastCharInside > 0 {
-		var work bytes.Buffer
-		if doInline {
-			p.inline(&work, data[start:lastCharInside])
-			renderer(out, work.Bytes())
-		} else {
-			renderer(out, data[start:lastCharInside])
-		}
-		next := lastCharInside + 1
-		return next
-	}
-
-	return 0
-}
-
-// ~~ Text Markup
-func generateVerbatim(p *parser, out *bytes.Buffer, data []byte, offset int) int {
-	return generator(p, out, data, offset, '=', false, p.r.CodeSpan)
-}
-
-func generateCode(p *parser, out *bytes.Buffer, data []byte, offset int) int {
-	return generator(p, out, data, offset, '~', false, p.r.CodeSpan)
-}
-
-func generateEmphasis(p *parser, out *bytes.Buffer, data []byte, offset int) int {
-	return generator(p, out, data, offset, '/', true, p.r.Emphasis)
-}
-
-func generateUnderline(p *parser, out *bytes.Buffer, data []byte, offset int) int {
-	underline := func(out *bytes.Buffer, text []byte) {
-		out.WriteString("<span style=\"text-decoration: underline;\">")
-		out.Write(text)
-		out.WriteString("</span>")
-	}
-
-	return generator(p, out, data, offset, '_', true, underline)
-}
-
-func generateBold(p *parser, out *bytes.Buffer, data []byte, offset int) int {
-	return generator(p, out, data, offset, '*', true, p.r.DoubleEmphasis)
-}
-
-func generateStrikethrough(p *parser, out *bytes.Buffer, data []byte, offset int) int {
-	return generator(p, out, data, offset, '+', true, p.r.StrikeThrough)
-}
-
-// ~~ Images and Links (inc. Footnote)
-var reLinkOrImg = regexp.MustCompile(`\[\[(.+?)\]\[?(.*?)\]?\]`)
-
-func generateLinkOrImg(p *parser, out *bytes.Buffer, data []byte, offset int) int {
-	data = data[offset+1:]
-	start := 1
-	i := start
-	var hyperlink []byte
-	isImage := false
-	isFootnote := false
-	closedLink := false
-	hasContent := false
-
-	if bytes.Equal(data[0:3], []byte("fn:")) {
-		isFootnote = true
-	} else if data[0] != '[' {
-		return 0
-	}
-
-	if bytes.Equal(data[1:6], []byte("file:")) {
-		isImage = true
-	}
-
-	for i < len(data) {
-		currChar := data[i]
-		switch {
-		case charMatches(currChar, ']') && closedLink == false:
-			if isImage {
-				hyperlink = data[start+5 : i]
-			} else if isFootnote {
-				refid := data[start+2 : i]
-				if bytes.Equal(refid, bytes.Trim(refid, " ")) {
-					p.notes = append(p.notes, footnotes{string(refid), "DEFINITION NOT FOUND"})
-					p.r.FootnoteRef(out, refid, len(p.notes))
-					return i + 2
-				} else {
-					return 0
-				}
-			} else if bytes.Equal(data[i-4:i], []byte(".org")) {
-				orgStart := start
-				if bytes.Equal(data[orgStart:orgStart+2], []byte("./")) {
-					orgStart = orgStart + 1
-				}
-				hyperlink = data[orgStart : i-4]
-			} else {
-				hyperlink = data[start:i]
-			}
-			closedLink = true
-		case charMatches(currChar, '['):
-			start = i + 1
-			hasContent = true
-		case charMatches(currChar, ']') && closedLink == true && hasContent == true && isImage == true:
-			p.r.Image(out, hyperlink, data[start:i], data[start:i])
-			return i + 3
-		case charMatches(currChar, ']') && closedLink == true && hasContent == true:
-			var tmpBuf bytes.Buffer
-			p.inline(&tmpBuf, data[start:i])
-			p.r.Link(out, hyperlink, tmpBuf.Bytes(), tmpBuf.Bytes())
-			return i + 3
-		case charMatches(currChar, ']') && closedLink == true && hasContent == false && isImage == true:
-			p.r.Image(out, hyperlink, hyperlink, hyperlink)
-			return i + 2
-		case charMatches(currChar, ']') && closedLink == true && hasContent == false:
-			p.r.Link(out, hyperlink, hyperlink, hyperlink)
-			return i + 2
-		}
-		i++
-	}
-
-	return 0
-}
-
-// Helpers
-func skipChar(data []byte, start int, char byte) int {
-	i := start
-	for i < len(data) && charMatches(data[i], char) {
-		i++
-	}
-	return i
-}
-
-func isSpace(char byte) bool {
-	return charMatches(char, ' ')
-}
-
-func isEmpty(data []byte) bool {
-	if len(data) == 0 {
-		return true
-	}
-
-	for i := 0; i < len(data) && !charMatches(data[i], '\n'); i++ {
-		if !charMatches(data[i], ' ') && !charMatches(data[i], '\t') {
-			return false
-		}
-	}
-	return true
-}
-
-func charMatches(a byte, b byte) bool {
-	return a == b
-}

vendor/github.com/chaseadamsio/goorgeous/header.go

@@ -1,70 +0,0 @@
-package goorgeous
-
-import (
-	"bufio"
-	"bytes"
-	"regexp"
-	"strings"
-)
-
-// ExtractOrgHeaders finds and returns all of the headers
-// from a bufio.Reader and returns them as their own byte slice
-func ExtractOrgHeaders(r *bufio.Reader) (fm []byte, err error) {
-	var out bytes.Buffer
-	endOfHeaders := true
-	for endOfHeaders {
-		p, err := r.Peek(2)
-		if err != nil {
-			return nil, err
-		}
-		if !charMatches(p[0], '#') && !charMatches(p[1], '+') {
-			endOfHeaders = false
-			break
-		}
-		line, _, err := r.ReadLine()
-		if err != nil {
-			return nil, err
-		}
-		out.Write(line)
-		out.WriteByte('\n')
-	}
-	return out.Bytes(), nil
-}
-
-var reHeader = regexp.MustCompile(`^#\+(\w+?): (.*)`)
-
-// OrgHeaders find all of the headers from a byte slice and returns
-// them as a map of string interface
-func OrgHeaders(input []byte) (map[string]interface{}, error) {
-	out := make(map[string]interface{})
-	scanner := bufio.NewScanner(bytes.NewReader(input))
-
-	for scanner.Scan() {
-		data := scanner.Bytes()
-		if !charMatches(data[0], '#') && !charMatches(data[1], '+') {
-			return out, nil
-		}
-		matches := reHeader.FindSubmatch(data)
-
-		if len(matches) < 3 {
-			continue
-		}
-
-		key := string(matches[1])
-		val := matches[2]
-		switch {
-		case strings.ToLower(key) == "tags" || strings.ToLower(key) == "categories" || strings.ToLower(key) == "aliases":
-			bTags := bytes.Split(val, []byte(" "))
-			tags := make([]string, len(bTags))
-			for idx, tag := range bTags {
-				tags[idx] = string(tag)
-			}
-			out[key] = tags
-		default:
-			out[key] = string(val)
-		}
-
-	}
-	return out, nil
-
-}

vendor/github.com/niklasfasching/go-org/LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2017 Chase Adams <realchaseadams@gmail.com>
+Copyright (c) 2018 Niklas Fasching
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

vendor/github.com/niklasfasching/go-org/org/block.go

@@ -0,0 +1,84 @@
+package org
+
+import (
+	"regexp"
+	"strings"
+	"unicode"
+)
+
+type Block struct {
+	Name       string
+	Parameters []string
+	Children   []Node
+}
+
+type Example struct {
+	Children []Node
+}
+
+var exampleLineRegexp = regexp.MustCompile(`^(\s*):(\s(.*)|\s*$)`)
+var beginBlockRegexp = regexp.MustCompile(`(?i)^(\s*)#\+BEGIN_(\w+)(.*)`)
+var endBlockRegexp = regexp.MustCompile(`(?i)^(\s*)#\+END_(\w+)`)
+
+func lexBlock(line string) (token, bool) {
+	if m := beginBlockRegexp.FindStringSubmatch(line); m != nil {
+		return token{"beginBlock", len(m[1]), strings.ToUpper(m[2]), m}, true
+	} else if m := endBlockRegexp.FindStringSubmatch(line); m != nil {
+		return token{"endBlock", len(m[1]), strings.ToUpper(m[2]), m}, true
+	}
+	return nilToken, false
+}
+
+func lexExample(line string) (token, bool) {
+	if m := exampleLineRegexp.FindStringSubmatch(line); m != nil {
+		return token{"example", len(m[1]), m[3], m}, true
+	}
+	return nilToken, false
+}
+
+func isRawTextBlock(name string) bool { return name == "SRC" || name == "EXAMPLE" || name == "EXPORT" }
+
+func (d *Document) parseBlock(i int, parentStop stopFn) (int, Node) {
+	t, start := d.tokens[i], i
+	name, parameters := t.content, strings.Fields(t.matches[3])
+	trim := trimIndentUpTo(d.tokens[i].lvl)
+	stop := func(d *Document, i int) bool {
+		return i >= len(d.tokens) || (d.tokens[i].kind == "endBlock" && d.tokens[i].content == name)
+	}
+	block, i := Block{name, parameters, nil}, i+1
+	if isRawTextBlock(name) {
+		rawText := ""
+		for ; !stop(d, i); i++ {
+			rawText += trim(d.tokens[i].matches[0]) + "\n"
+		}
+		block.Children = d.parseRawInline(rawText)
+	} else {
+		consumed, nodes := d.parseMany(i, stop)
+		block.Children = nodes
+		i += consumed
+	}
+	if i < len(d.tokens) && d.tokens[i].kind == "endBlock" && d.tokens[i].content == name {
+		return i + 1 - start, block
+	}
+	return 0, nil
+}
+
+func (d *Document) parseExample(i int, parentStop stopFn) (int, Node) {
+	example, start := Example{}, i
+	for ; !parentStop(d, i) && d.tokens[i].kind == "example"; i++ {
+		example.Children = append(example.Children, Text{d.tokens[i].content, true})
+	}
+	return i - start, example
+}
+
+func trimIndentUpTo(max int) func(string) string {
+	return func(line string) string {
+		i := 0
+		for ; i < len(line) && i < max && unicode.IsSpace(rune(line[i])); i++ {
+		}
+		return line[i:]
+	}
+}
+
+func (n Example) String() string { return orgWriter.nodesAsString(n) }
+func (n Block) String() string   { return orgWriter.nodesAsString(n) }

vendor/github.com/niklasfasching/go-org/org/document.go

@@ -0,0 +1,260 @@
+// Package org is an Org mode syntax processor.
+//
+// It parses plain text into an AST and can export it as HTML or pretty printed Org mode syntax.
+// Further export formats can be defined using the Writer interface.
+//
+// You probably want to start with something like this:
+//   input := strings.NewReader("Your Org mode input")
+//   html, err := org.New().Parse(input, "./").Write(org.NewHTMLWriter())
+//   if err != nil {
+//       log.Fatalf("Something went wrong: %s", err)
+//   }
+//   log.Print(html)
+package org
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"os"
+	"strings"
+)
+
+type Configuration struct {
+	MaxEmphasisNewLines int                                   // Maximum number of newlines inside an emphasis. See org-emphasis-regexp-components newline.
+	AutoLink            bool                                  // Try to convert text passages that look like hyperlinks into hyperlinks.
+	DefaultSettings     map[string]string                     // Default values for settings that are overriden by setting the same key in BufferSettings.
+	Log                 *log.Logger                           // Log is used to print warnings during parsing.
+	ReadFile            func(filename string) ([]byte, error) // ReadFile is used to read e.g. #+INCLUDE files.
+}
+
+// Document contains the parsing results and a pointer to the Configuration.
+type Document struct {
+	*Configuration
+	Path           string // Path of the file containing the parse input - used to resolve relative paths during parsing (e.g. INCLUDE).
+	tokens         []token
+	Nodes          []Node
+	NamedNodes     map[string]Node
+	Outline        Outline           // Outline is a Table Of Contents for the document and contains all sections (headline + content).
+	BufferSettings map[string]string // Settings contains all settings that were parsed from keywords.
+	Error          error
+}
+
+// Node represents a parsed node of the document.
+type Node interface {
+	String() string // String returns the pretty printed Org mode string for the node (see OrgWriter).
+}
+
+type lexFn = func(line string) (t token, ok bool)
+type parseFn = func(*Document, int, stopFn) (int, Node)
+type stopFn = func(*Document, int) bool
+
+type token struct {
+	kind    string
+	lvl     int
+	content string
+	matches []string
+}
+
+var lexFns = []lexFn{
+	lexHeadline,
+	lexDrawer,
+	lexBlock,
+	lexList,
+	lexTable,
+	lexHorizontalRule,
+	lexKeywordOrComment,
+	lexFootnoteDefinition,
+	lexExample,
+	lexText,
+}
+
+var nilToken = token{"nil", -1, "", nil}
+var orgWriter = NewOrgWriter()
+
+// New returns a new Configuration with (hopefully) sane defaults.
+func New() *Configuration {
+	return &Configuration{
+		AutoLink:            true,
+		MaxEmphasisNewLines: 1,
+		DefaultSettings: map[string]string{
+			"TODO":         "TODO | DONE",
+			"EXCLUDE_TAGS": "noexport",
+			"OPTIONS":      "toc:t <:t e:t f:t pri:t todo:t tags:t",
+		},
+		Log:      log.New(os.Stderr, "go-org: ", 0),
+		ReadFile: ioutil.ReadFile,
+	}
+}
+
+// String returns the pretty printed Org mode string for the given nodes (see OrgWriter).
+func String(nodes []Node) string { return orgWriter.nodesAsString(nodes...) }
+
+// Write is called after with an instance of the Writer interface to export a parsed Document into another format.
+func (d *Document) Write(w Writer) (out string, err error) {
+	defer func() {
+		if recovered := recover(); recovered != nil {
+			err = fmt.Errorf("could not write output: %s", recovered)
+		}
+	}()
+	if d.Error != nil {
+		return "", d.Error
+	} else if d.Nodes == nil {
+		return "", fmt.Errorf("could not write output: parse was not called")
+	}
+	w.Before(d)
+	WriteNodes(w, d.Nodes...)
+	w.After(d)
+	return w.String(), err
+}
+
+// Parse parses the input into an AST (and some other helpful fields like Outline).
+// To allow method chaining, errors are stored in document.Error rather than being returned.
+func (c *Configuration) Parse(input io.Reader, path string) (d *Document) {
+	outlineSection := &Section{}
+	d = &Document{
+		Configuration:  c,
+		Outline:        Outline{outlineSection, outlineSection, 0},
+		BufferSettings: map[string]string{},
+		NamedNodes:     map[string]Node{},
+		Path:           path,
+	}
+	defer func() {
+		if recovered := recover(); recovered != nil {
+			d.Error = fmt.Errorf("could not parse input: %v", recovered)
+		}
+	}()
+	if d.tokens != nil {
+		d.Error = fmt.Errorf("parse was called multiple times")
+	}
+	d.tokenize(input)
+	_, nodes := d.parseMany(0, func(d *Document, i int) bool { return i >= len(d.tokens) })
+	d.Nodes = nodes
+	return d
+}
+
+// Silent disables all logging of warnings during parsing.
+func (c *Configuration) Silent() *Configuration {
+	c.Log = log.New(ioutil.Discard, "", 0)
+	return c
+}
+
+func (d *Document) tokenize(input io.Reader) {
+	d.tokens = []token{}
+	scanner := bufio.NewScanner(input)
+	for scanner.Scan() {
+		d.tokens = append(d.tokens, tokenize(scanner.Text()))
+	}
+	if err := scanner.Err(); err != nil {
+		d.Error = fmt.Errorf("could not tokenize input: %s", err)
+	}
+}
+
+// Get returns the value for key in BufferSettings or DefaultSettings if key does not exist in the former
+func (d *Document) Get(key string) string {
+	if v, ok := d.BufferSettings[key]; ok {
+		return v
+	}
+	if v, ok := d.DefaultSettings[key]; ok {
+		return v
+	}
+	return ""
+}
+
+// GetOption returns the value associated to the export option key
+// Currently supported options:
+// - < (export timestamps)
+// - e (export org entities)
+// - f (export footnotes)
+// - toc (export table of content)
+// - todo (export headline todo status)
+// - pri (export headline priority)
+// - tags (export headline tags)
+// see https://orgmode.org/manual/Export-settings.html for more information
+func (d *Document) GetOption(key string) bool {
+	get := func(settings map[string]string) string {
+		for _, field := range strings.Fields(settings["OPTIONS"]) {
+			if strings.HasPrefix(field, key+":") {
+				return field[len(key)+1:]
+			}
+		}
+		return ""
+	}
+	value := get(d.BufferSettings)
+	if value == "" {
+		value = get(d.DefaultSettings)
+	}
+	switch value {
+	case "t":
+		return true
+	case "nil":
+		return false
+	default:
+		d.Log.Printf("Bad value for export option %s (%s)", key, value)
+		return false
+	}
+}
+
+func (d *Document) parseOne(i int, stop stopFn) (consumed int, node Node) {
+	switch d.tokens[i].kind {
+	case "unorderedList", "orderedList":
+		consumed, node = d.parseList(i, stop)
+	case "tableRow", "tableSeparator":
+		consumed, node = d.parseTable(i, stop)
+	case "beginBlock":
+		consumed, node = d.parseBlock(i, stop)
+	case "beginDrawer":
+		consumed, node = d.parseDrawer(i, stop)
+	case "text":
+		consumed, node = d.parseParagraph(i, stop)
+	case "example":
+		consumed, node = d.parseExample(i, stop)
+	case "horizontalRule":
+		consumed, node = d.parseHorizontalRule(i, stop)
+	case "comment":
+		consumed, node = d.parseComment(i, stop)
+	case "keyword":
+		consumed, node = d.parseKeyword(i, stop)
+	case "headline":
+		consumed, node = d.parseHeadline(i, stop)
+	case "footnoteDefinition":
+		consumed, node = d.parseFootnoteDefinition(i, stop)
+	}
+
+	if consumed != 0 {
+		return consumed, node
+	}
+	d.Log.Printf("Could not parse token %#v: Falling back to treating it as plain text.", d.tokens[i])
+	m := plainTextRegexp.FindStringSubmatch(d.tokens[i].matches[0])
+	d.tokens[i] = token{"text", len(m[1]), m[2], m}
+	return d.parseOne(i, stop)
+}
+
+func (d *Document) parseMany(i int, stop stopFn) (int, []Node) {
+	start, nodes := i, []Node{}
+	for i < len(d.tokens) && !stop(d, i) {
+		consumed, node := d.parseOne(i, stop)
+		i += consumed
+		nodes = append(nodes, node)
+	}
+	return i - start, nodes
+}
+
+func (d *Document) addHeadline(headline *Headline) int {
+	current := &Section{Headline: headline}
+	d.Outline.last.add(current)
+	d.Outline.count++
+	d.Outline.last = current
+	return d.Outline.count
+}
+
+func tokenize(line string) token {
+	for _, lexFn := range lexFns {
+		if token, ok := lexFn(line); ok {
+			return token
+		}
+	}
+	panic(fmt.Sprintf("could not lex line: %s", line))
+}

vendor/github.com/niklasfasching/go-org/org/drawer.go

@@ -0,0 +1,97 @@
+package org
+
+import (
+	"regexp"
+	"strings"
+)
+
+type Drawer struct {
+	Name     string
+	Children []Node
+}
+
+type PropertyDrawer struct {
+	Properties [][]string
+}
+
+var beginDrawerRegexp = regexp.MustCompile(`^(\s*):(\S+):\s*$`)
+var endDrawerRegexp = regexp.MustCompile(`^(\s*):END:\s*$`)
+var propertyRegexp = regexp.MustCompile(`^(\s*):(\S+):(\s+(.*)$|$)`)
+
+func lexDrawer(line string) (token, bool) {
+	if m := endDrawerRegexp.FindStringSubmatch(line); m != nil {
+		return token{"endDrawer", len(m[1]), "", m}, true
+	} else if m := beginDrawerRegexp.FindStringSubmatch(line); m != nil {
+		return token{"beginDrawer", len(m[1]), strings.ToUpper(m[2]), m}, true
+	}
+	return nilToken, false
+}
+
+func (d *Document) parseDrawer(i int, parentStop stopFn) (int, Node) {
+	name := strings.ToUpper(d.tokens[i].content)
+	if name == "PROPERTIES" {
+		return d.parsePropertyDrawer(i, parentStop)
+	}
+	drawer, start := Drawer{Name: name}, i
+	i++
+	stop := func(d *Document, i int) bool {
+		if parentStop(d, i) {
+			return true
+		}
+		kind := d.tokens[i].kind
+		return kind == "beginDrawer" || kind == "endDrawer" || kind == "headline"
+	}
+	for {
+		consumed, nodes := d.parseMany(i, stop)
+		i += consumed
+		drawer.Children = append(drawer.Children, nodes...)
+		if i < len(d.tokens) && d.tokens[i].kind == "beginDrawer" {
+			p := Paragraph{[]Node{Text{":" + d.tokens[i].content + ":", false}}}
+			drawer.Children = append(drawer.Children, p)
+			i++
+		} else {
+			break
+		}
+	}
+	if i < len(d.tokens) && d.tokens[i].kind == "endDrawer" {
+		i++
+	}
+	return i - start, drawer
+}
+
+func (d *Document) parsePropertyDrawer(i int, parentStop stopFn) (int, Node) {
+	drawer, start := PropertyDrawer{}, i
+	i++
+	stop := func(d *Document, i int) bool {
+		return parentStop(d, i) || (d.tokens[i].kind != "text" && d.tokens[i].kind != "beginDrawer")
+	}
+	for ; !stop(d, i); i++ {
+		m := propertyRegexp.FindStringSubmatch(d.tokens[i].matches[0])
+		if m == nil {
+			return 0, nil
+		}
+		k, v := strings.ToUpper(m[2]), strings.TrimSpace(m[4])
+		drawer.Properties = append(drawer.Properties, []string{k, v})
+	}
+	if i < len(d.tokens) && d.tokens[i].kind == "endDrawer" {
+		i++
+	} else {
+		return 0, nil
+	}
+	return i - start, drawer
+}
+
+func (d *PropertyDrawer) Get(key string) (string, bool) {
+	if d == nil {
+		return "", false
+	}
+	for _, kvPair := range d.Properties {
+		if kvPair[0] == key {
+			return kvPair[1], true
+		}
+	}
+	return "", false
+}
+
+func (n Drawer) String() string         { return orgWriter.nodesAsString(n) }
+func (n PropertyDrawer) String() string { return orgWriter.nodesAsString(n) }

vendor/github.com/niklasfasching/go-org/org/footnote.go

@@ -0,0 +1,35 @@
+package org
+
+import (
+	"regexp"
+)
+
+type FootnoteDefinition struct {
+	Name     string
+	Children []Node
+	Inline   bool
+}
+
+var footnoteDefinitionRegexp = regexp.MustCompile(`^\[fn:([\w-]+)\](\s+(.+)|\s*$)`)
+
+func lexFootnoteDefinition(line string) (token, bool) {
+	if m := footnoteDefinitionRegexp.FindStringSubmatch(line); m != nil {
+		return token{"footnoteDefinition", 0, m[1], m}, true
+	}
+	return nilToken, false
+}
+
+func (d *Document) parseFootnoteDefinition(i int, parentStop stopFn) (int, Node) {
+	start, name := i, d.tokens[i].content
+	d.tokens[i] = tokenize(d.tokens[i].matches[2])
+	stop := func(d *Document, i int) bool {
+		return parentStop(d, i) ||
+			(isSecondBlankLine(d, i) && i > start+1) ||
+			d.tokens[i].kind == "headline" || d.tokens[i].kind == "footnoteDefinition"
+	}
+	consumed, nodes := d.parseMany(i, stop)
+	definition := FootnoteDefinition{name, nodes, false}
+	return consumed, definition
+}
+
+func (n FootnoteDefinition) String() string { return orgWriter.nodesAsString(n) }

vendor/github.com/niklasfasching/go-org/org/fuzz.go

@@ -0,0 +1,27 @@
+// +build gofuzz
+
+package org
+
+import (
+	"bytes"
+	"strings"
+)
+
+// Fuzz function to be used by https://github.com/dvyukov/go-fuzz
+func Fuzz(input []byte) int {
+	conf := New().Silent()
+	d := conf.Parse(bytes.NewReader(input), "")
+	orgOutput, err := d.Write(NewOrgWriter())
+	if err != nil {
+		panic(err)
+	}
+	htmlOutputA, err := d.Write(NewHTMLWriter())
+	if err != nil {
+		panic(err)
+	}
+	htmlOutputB, err := conf.Parse(strings.NewReader(orgOutput), "").Write(NewHTMLWriter())
+	if htmlOutputA != htmlOutputB {
+		panic("rendered org results in different html than original input")
+	}
+	return 0
+}

vendor/github.com/niklasfasching/go-org/org/headline.go

@@ -0,0 +1,101 @@
+package org
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+	"unicode"
+)
+
+type Outline struct {
+	*Section
+	last  *Section
+	count int
+}
+
+type Section struct {
+	Headline *Headline
+	Parent   *Section
+	Children []*Section
+}
+
+type Headline struct {
+	Index      int
+	Lvl        int
+	Status     string
+	Priority   string
+	Properties *PropertyDrawer
+	Title      []Node
+	Tags       []string
+	Children   []Node
+}
+
+var headlineRegexp = regexp.MustCompile(`^([*]+)\s+(.*)`)
+var tagRegexp = regexp.MustCompile(`(.*?)\s+(:[A-Za-z0-9_@#%:]+:\s*$)`)
+
+func lexHeadline(line string) (token, bool) {
+	if m := headlineRegexp.FindStringSubmatch(line); m != nil {
+		return token{"headline", len(m[1]), m[2], m}, true
+	}
+	return nilToken, false
+}
+
+func (d *Document) parseHeadline(i int, parentStop stopFn) (int, Node) {
+	t, headline := d.tokens[i], Headline{}
+	headline.Lvl = t.lvl
+
+	headline.Index = d.addHeadline(&headline)
+
+	text := t.content
+	todoKeywords := strings.FieldsFunc(d.Get("TODO"), func(r rune) bool { return unicode.IsSpace(r) || r == '|' })
+	for _, k := range todoKeywords {
+		if strings.HasPrefix(text, k) && len(text) > len(k) && unicode.IsSpace(rune(text[len(k)])) {
+			headline.Status = k
+			text = text[len(k)+1:]
+			break
+		}
+	}
+
+	if len(text) >= 4 && text[0:2] == "[#" && strings.Contains("ABC", text[2:3]) && text[3] == ']' {
+		headline.Priority = text[2:3]
+		text = strings.TrimSpace(text[4:])
+	}
+
+	if m := tagRegexp.FindStringSubmatch(text); m != nil {
+		text = m[1]
+		headline.Tags = strings.FieldsFunc(m[2], func(r rune) bool { return r == ':' })
+	}
+
+	headline.Title = d.parseInline(text)
+
+	stop := func(d *Document, i int) bool {
+		return parentStop(d, i) || d.tokens[i].kind == "headline" && d.tokens[i].lvl <= headline.Lvl
+	}
+	consumed, nodes := d.parseMany(i+1, stop)
+	if len(nodes) > 0 {
+		if d, ok := nodes[0].(PropertyDrawer); ok {
+			headline.Properties = &d
+			nodes = nodes[1:]
+		}
+	}
+	headline.Children = nodes
+	return consumed + 1, headline
+}
+
+func (h Headline) ID() string {
+	if customID, ok := h.Properties.Get("CUSTOM_ID"); ok {
+		return customID
+	}
+	return fmt.Sprintf("headline-%d", h.Index)
+}
+
+func (parent *Section) add(current *Section) {
+	if parent.Headline == nil || parent.Headline.Lvl < current.Headline.Lvl {
+		parent.Children = append(parent.Children, current)
+		current.Parent = parent
+	} else {
+		parent.Parent.add(current)
+	}
+}
+
+func (n Headline) String() string { return orgWriter.nodesAsString(n) }

vendor/github.com/niklasfasching/go-org/org/html_entity.go

@@ -0,0 +1,437 @@
+package org
+
+import "strings"
+
+var htmlEntityReplacer *strings.Replacer
+
+func init() {
+	htmlEntities = append(htmlEntities,
+		"---", "—",
+		"--", "–",
+		"...", "…",
+	)
+	htmlEntityReplacer = strings.NewReplacer(htmlEntities...)
+}
+
+/*
+Generated & copied over using the following elisp
+(Setting up go generate seems like a waste for now - I call YAGNI on that one)
+
+(insert (mapconcat
+         (lambda (entity) (concat "`\\" (car entity) "`, `" (nth 6 entity) "`")) ; entity -> utf8
+         (remove-if-not 'listp org-entities)
+         ",\n"))
+*/
+var htmlEntities = []string{
+	`\Agrave`, `À`,
+	`\agrave`, `à`,
+	`\Aacute`, `Á`,
+	`\aacute`, `á`,
+	`\Acirc`, `Â`,
+	`\acirc`, `â`,
+	`\Amacr`, `Ã`,
+	`\amacr`, `ã`,
+	`\Atilde`, `Ã`,
+	`\atilde`, `ã`,
+	`\Auml`, `Ä`,
+	`\auml`, `ä`,
+	`\Aring`, `Å`,
+	`\AA`, `Å`,
+	`\aring`, `å`,
+	`\AElig`, `Æ`,
+	`\aelig`, `æ`,
+	`\Ccedil`, `Ç`,
+	`\ccedil`, `ç`,
+	`\Egrave`, `È`,
+	`\egrave`, `è`,
+	`\Eacute`, `É`,
+	`\eacute`, `é`,
+	`\Ecirc`, `Ê`,
+	`\ecirc`, `ê`,
+	`\Euml`, `Ë`,
+	`\euml`, `ë`,
+	`\Igrave`, `Ì`,
+	`\igrave`, `ì`,
+	`\Iacute`, `Í`,
+	`\iacute`, `í`,
+	`\Icirc`, `Î`,
+	`\icirc`, `î`,
+	`\Iuml`, `Ï`,
+	`\iuml`, `ï`,
+	`\Ntilde`, `Ñ`,
+	`\ntilde`, `ñ`,
+	`\Ograve`, `Ò`,
+	`\ograve`, `ò`,
+	`\Oacute`, `Ó`,
+	`\oacute`, `ó`,
+	`\Ocirc`, `Ô`,
+	`\ocirc`, `ô`,
+	`\Otilde`, `Õ`,
+	`\otilde`, `õ`,
+	`\Ouml`, `Ö`,
+	`\ouml`, `ö`,
+	`\Oslash`, `Ø`,
+	`\oslash`, `ø`,
+	`\OElig`, `Œ`,
+	`\oelig`, `œ`,
+	`\Scaron`, `Š`,
+	`\scaron`, `š`,
+	`\szlig`, `ß`,
+	`\Ugrave`, `Ù`,
+	`\ugrave`, `ù`,
+	`\Uacute`, `Ú`,
+	`\uacute`, `ú`,
+	`\Ucirc`, `Û`,
+	`\ucirc`, `û`,
+	`\Uuml`, `Ü`,
+	`\uuml`, `ü`,
+	`\Yacute`, `Ý`,
+	`\yacute`, `ý`,
+	`\Yuml`, `Ÿ`,
+	`\yuml`, `ÿ`,
+	`\fnof`, `ƒ`,
+	`\real`, `ℜ`,
+	`\image`, `ℑ`,
+	`\weierp`, `℘`,
+	`\ell`, `ℓ`,
+	`\imath`, `ı`,
+	`\jmath`, `ȷ`,
+	`\Alpha`, `Α`,
+	`\alpha`, `α`,
+	`\Beta`, `Β`,
+	`\beta`, `β`,
+	`\Gamma`, `Γ`,
+	`\gamma`, `γ`,
+	`\Delta`, `Δ`,
+	`\delta`, `δ`,
+	`\Epsilon`, `Ε`,
+	`\epsilon`, `ε`,
+	`\varepsilon`, `ε`,
+	`\Zeta`, `Ζ`,
+	`\zeta`, `ζ`,
+	`\Eta`, `Η`,
+	`\eta`, `η`,
+	`\Theta`, `Θ`,
+	`\theta`, `θ`,
+	`\thetasym`, `ϑ`,
+	`\vartheta`, `ϑ`,
+	`\Iota`, `Ι`,
+	`\iota`, `ι`,
+	`\Kappa`, `Κ`,
+	`\kappa`, `κ`,
+	`\Lambda`, `Λ`,
+	`\lambda`, `λ`,
+	`\Mu`, `Μ`,
+	`\mu`, `μ`,
+	`\nu`, `ν`,
+	`\Nu`, `Ν`,
+	`\Xi`, `Ξ`,
+	`\xi`, `ξ`,
+	`\Omicron`, `Ο`,
+	`\omicron`, `ο`,
+	`\Pi`, `Π`,
+	`\pi`, `π`,
+	`\Rho`, `Ρ`,
+	`\rho`, `ρ`,
+	`\Sigma`, `Σ`,
+	`\sigma`, `σ`,
+	`\sigmaf`, `ς`,
+	`\varsigma`, `ς`,
+	`\Tau`, `Τ`,
+	`\Upsilon`, `Υ`,
+	`\upsih`, `ϒ`,
+	`\upsilon`, `υ`,
+	`\Phi`, `Φ`,
+	`\phi`, `ɸ`,
+	`\varphi`, `φ`,
+	`\Chi`, `Χ`,
+	`\chi`, `χ`,
+	`\acutex`, `𝑥́`,
+	`\Psi`, `Ψ`,
+	`\psi`, `ψ`,
+	`\tau`, `τ`,
+	`\Omega`, `Ω`,
+	`\omega`, `ω`,
+	`\piv`, `ϖ`,
+	`\varpi`, `ϖ`,
+	`\partial`, `∂`,
+	`\alefsym`, `ℵ`,
+	`\aleph`, `ℵ`,
+	`\gimel`, `ℷ`,
+	`\beth`, `ב`,
+	`\dalet`, `ד`,
+	`\ETH`, `Ð`,
+	`\eth`, `ð`,
+	`\THORN`, `Þ`,
+	`\thorn`, `þ`,
+	`\dots`, `…`,
+	`\cdots`, `⋯`,
+	`\hellip`, `…`,
+	`\middot`, `·`,
+	`\iexcl`, `¡`,
+	`\iquest`, `¿`,
+	`\shy`, ``,
+	`\ndash`, `–`,
+	`\mdash`, `—`,
+	`\quot`, `"`,
+	`\acute`, `´`,
+	`\ldquo`, `“`,
+	`\rdquo`, `”`,
+	`\bdquo`, `„`,
+	`\lsquo`, `‘`,
+	`\rsquo`, `’`,
+	`\sbquo`, `‚`,
+	`\laquo`, `«`,
+	`\raquo`, `»`,
+	`\lsaquo`, `‹`,
+	`\rsaquo`, `›`,
+	`\circ`, `∘`,
+	`\vert`, `|`,
+	`\vbar`, `|`,
+	`\brvbar`, `¦`,
+	`\S`, `§`,
+	`\sect`, `§`,
+	`\amp`, `&`,
+	`\lt`, `<`,
+	`\gt`, `>`,
+	`\tilde`, `~`,
+	`\slash`, `/`,
+	`\plus`, `+`,
+	`\under`, `_`,
+	`\equal`, `=`,
+	`\asciicirc`, `^`,
+	`\dagger`, `†`,
+	`\dag`, `†`,
+	`\Dagger`, `‡`,
+	`\ddag`, `‡`,
+	`\nbsp`, ` `,
+	`\ensp`, ` `,
+	`\emsp`, ` `,
+	`\thinsp`, ` `,
+	`\curren`, `¤`,
+	`\cent`, `¢`,
+	`\pound`, `£`,
+	`\yen`, `¥`,
+	`\euro`, `€`,
+	`\EUR`, `€`,
+	`\dollar`, `$`,
+	`\USD`, `$`,
+	`\copy`, `©`,
+	`\reg`, `®`,
+	`\trade`, `™`,
+	`\minus`, `−`,
+	`\pm`, `±`,
+	`\plusmn`, `±`,
+	`\times`, `×`,
+	`\frasl`, `⁄`,
+	`\colon`, `:`,
+	`\div`, `÷`,
+	`\frac12`, `½`,
+	`\frac14`, `¼`,
+	`\frac34`, `¾`,
+	`\permil`, `‰`,
+	`\sup1`, `¹`,
+	`\sup2`, `²`,
+	`\sup3`, `³`,
+	`\radic`, `√`,
+	`\sum`, `∑`,
+	`\prod`, `∏`,
+	`\micro`, `µ`,
+	`\macr`, `¯`,
+	`\deg`, `°`,
+	`\prime`, `′`,
+	`\Prime`, `″`,
+	`\infin`, `∞`,
+	`\infty`, `∞`,
+	`\prop`, `∝`,
+	`\propto`, `∝`,
+	`\not`, `¬`,
+	`\neg`, `¬`,
+	`\land`, `∧`,
+	`\wedge`, `∧`,
+	`\lor`, `∨`,
+	`\vee`, `∨`,
+	`\cap`, `∩`,
+	`\cup`, `∪`,
+	`\smile`, `⌣`,
+	`\frown`, `⌢`,
+	`\int`, `∫`,
+	`\therefore`, `∴`,
+	`\there4`, `∴`,
+	`\because`, `∵`,
+	`\sim`, `∼`,
+	`\cong`, `≅`,
+	`\simeq`, `≅`,
+	`\asymp`, `≈`,
+	`\approx`, `≈`,
+	`\ne`, `≠`,
+	`\neq`, `≠`,
+	`\equiv`, `≡`,
+	`\triangleq`, `≜`,
+	`\le`, `≤`,
+	`\leq`, `≤`,
+	`\ge`, `≥`,
+	`\geq`, `≥`,
+	`\lessgtr`, `≶`,
+	`\lesseqgtr`, `⋚`,
+	`\ll`, `≪`,
+	`\Ll`, `⋘`,
+	`\lll`, `⋘`,
+	`\gg`, `≫`,
+	`\Gg`, `⋙`,
+	`\ggg`, `⋙`,
+	`\prec`, `≺`,
+	`\preceq`, `≼`,
+	`\preccurlyeq`, `≼`,
+	`\succ`, `≻`,
+	`\succeq`, `≽`,
+	`\succcurlyeq`, `≽`,
+	`\sub`, `⊂`,
+	`\subset`, `⊂`,
+	`\sup`, `⊃`,
+	`\supset`, `⊃`,
+	`\nsub`, `⊄`,
+	`\sube`, `⊆`,
+	`\nsup`, `⊅`,
+	`\supe`, `⊇`,
+	`\setminus`, `⧵`,
+	`\forall`, `∀`,
+	`\exist`, `∃`,
+	`\exists`, `∃`,
+	`\nexist`, `∄`,
+	`\nexists`, `∄`,
+	`\empty`, `∅`,
+	`\emptyset`, `∅`,
+	`\isin`, `∈`,
+	`\in`, `∈`,
+	`\notin`, `∉`,
+	`\ni`, `∋`,
+	`\nabla`, `∇`,
+	`\ang`, `∠`,
+	`\angle`, `∠`,
+	`\perp`, `⊥`,
+	`\parallel`, `∥`,
+	`\sdot`, `⋅`,
+	`\cdot`, `⋅`,
+	`\lceil`, `⌈`,
+	`\rceil`, `⌉`,
+	`\lfloor`, `⌊`,
+	`\rfloor`, `⌋`,
+	`\lang`, `⟨`,
+	`\rang`, `⟩`,
+	`\langle`, `⟨`,
+	`\rangle`, `⟩`,
+	`\hbar`, `ℏ`,
+	`\mho`, `℧`,
+	`\larr`, `←`,
+	`\leftarrow`, `←`,
+	`\gets`, `←`,
+	`\lArr`, `⇐`,
+	`\Leftarrow`, `⇐`,
+	`\uarr`, `↑`,
+	`\uparrow`, `↑`,
+	`\uArr`, `⇑`,
+	`\Uparrow`, `⇑`,
+	`\rarr`, `→`,
+	`\to`, `→`,
+	`\rightarrow`, `→`,
+	`\rArr`, `⇒`,
+	`\Rightarrow`, `⇒`,
+	`\darr`, `↓`,
+	`\downarrow`, `↓`,
+	`\dArr`, `⇓`,
+	`\Downarrow`, `⇓`,
+	`\harr`, `↔`,
+	`\leftrightarrow`, `↔`,
+	`\hArr`, `⇔`,
+	`\Leftrightarrow`, `⇔`,
+	`\crarr`, `↵`,
+	`\hookleftarrow`, `↵`,
+	`\arccos`, `arccos`,
+	`\arcsin`, `arcsin`,
+	`\arctan`, `arctan`,
+	`\arg`, `arg`,
+	`\cos`, `cos`,
+	`\cosh`, `cosh`,
+	`\cot`, `cot`,
+	`\coth`, `coth`,
+	`\csc`, `csc`,
+	`\deg`, `deg`,
+	`\det`, `det`,
+	`\dim`, `dim`,
+	`\exp`, `exp`,
+	`\gcd`, `gcd`,
+	`\hom`, `hom`,
+	`\inf`, `inf`,
+	`\ker`, `ker`,
+	`\lg`, `lg`,
+	`\lim`, `lim`,
+	`\liminf`, `liminf`,
+	`\limsup`, `limsup`,
+	`\ln`, `ln`,
+	`\log`, `log`,
+	`\max`, `max`,
+	`\min`, `min`,
+	`\Pr`, `Pr`,
+	`\sec`, `sec`,
+	`\sin`, `sin`,
+	`\sinh`, `sinh`,
+	`\sup`, `sup`,
+	`\tan`, `tan`,
+	`\tanh`, `tanh`,
+	`\bull`, `•`,
+	`\bullet`, `•`,
+	`\star`, `⋆`,
+	`\lowast`, `∗`,
+	`\ast`, `*`,
+	`\odot`, `ʘ`,
+	`\oplus`, `⊕`,
+	`\otimes`, `⊗`,
+	`\check`, `✓`,
+	`\checkmark`, `✓`,
+	`\para`, `¶`,
+	`\ordf`, `ª`,
+	`\ordm`, `º`,
+	`\cedil`, `¸`,
+	`\oline`, `‾`,
+	`\uml`, `¨`,
+	`\zwnj`, `‌`,
+	`\zwj`, `‍`,
+	`\lrm`, `‎`,
+	`\rlm`, `‏`,
+	`\smiley`, `☺`,
+	`\blacksmile`, `☻`,
+	`\sad`, `☹`,
+	`\frowny`, `☹`,
+	`\clubs`, `♣`,
+	`\clubsuit`, `♣`,
+	`\spades`, `♠`,
+	`\spadesuit`, `♠`,
+	`\hearts`, `♥`,
+	`\heartsuit`, `♥`,
+	`\diams`, `◆`,
+	`\diamondsuit`, `◆`,
+	`\diamond`, `◆`,
+	`\Diamond`, `◆`,
+	`\loz`, `⧫`,
+	`\_ `, ` `,
+	`\_  `, `  `,
+	`\_   `, `   `,
+	`\_    `, `    `,
+	`\_     `, `     `,
+	`\_      `, `      `,
+	`\_       `, `       `,
+	`\_        `, `        `,
+	`\_         `, `         `,
+	`\_          `, `          `,
+	`\_           `, `           `,
+	`\_            `, `            `,
+	`\_             `, `             `,
+	`\_              `, `              `,
+	`\_               `, `               `,
+	`\_                `, `                `,
+	`\_                 `, `                 `,
+	`\_                  `, `                  `,
+	`\_                   `, `                   `,
+	`\_                    `, `                    `,
+}

vendor/github.com/niklasfasching/go-org/org/html_writer.go

@@ -0,0 +1,504 @@
+package org
+
+import (
+	"fmt"
+	"html"
+	"log"
+	"regexp"
+	"strings"
+	"unicode"
+
+	h "golang.org/x/net/html"
+	"golang.org/x/net/html/atom"
+)
+
+// HTMLWriter exports an org document into a html document.
+type HTMLWriter struct {
+	ExtendingWriter    Writer
+	HighlightCodeBlock func(source, lang string) string
+
+	strings.Builder
+	document   *Document
+	htmlEscape bool
+	log        *log.Logger
+	footnotes  *footnotes
+}
+
+type footnotes struct {
+	mapping map[string]int
+	list    []*FootnoteDefinition
+}
+
+var emphasisTags = map[string][]string{
+	"/":   []string{"<em>", "</em>"},
+	"*":   []string{"<strong>", "</strong>"},
+	"+":   []string{"<del>", "</del>"},
+	"~":   []string{"<code>", "</code>"},
+	"=":   []string{`<code class="verbatim">`, "</code>"},
+	"_":   []string{`<span style="text-decoration: underline;">`, "</span>"},
+	"_{}": []string{"<sub>", "</sub>"},
+	"^{}": []string{"<sup>", "</sup>"},
+}
+
+var listTags = map[string][]string{
+	"unordered":   []string{"<ul>", "</ul>"},
+	"ordered":     []string{"<ol>", "</ol>"},
+	"descriptive": []string{"<dl>", "</dl>"},
+}
+
+var listItemStatuses = map[string]string{
+	" ": "unchecked",
+	"-": "indeterminate",
+	"X": "checked",
+}
+
+var cleanHeadlineTitleForHTMLAnchorRegexp = regexp.MustCompile(`</?a[^>]*>`) // nested a tags are not valid HTML
+
+func NewHTMLWriter() *HTMLWriter {
+	defaultConfig := New()
+	return &HTMLWriter{
+		document:   &Document{Configuration: defaultConfig},
+		log:        defaultConfig.Log,
+		htmlEscape: true,
+		HighlightCodeBlock: func(source, lang string) string {
+			return fmt.Sprintf("<div class=\"highlight\">\n<pre>\n%s\n</pre>\n</div>", html.EscapeString(source))
+		},
+		footnotes: &footnotes{
+			mapping: map[string]int{},
+		},
+	}
+}
+
+func (w *HTMLWriter) emptyClone() *HTMLWriter {
+	wcopy := *w
+	wcopy.Builder = strings.Builder{}
+	return &wcopy
+}
+
+func (w *HTMLWriter) nodesAsString(nodes ...Node) string {
+	tmp := w.emptyClone()
+	WriteNodes(tmp, nodes...)
+	return tmp.String()
+}
+
+func (w *HTMLWriter) WriterWithExtensions() Writer {
+	if w.ExtendingWriter != nil {
+		return w.ExtendingWriter
+	}
+	return w
+}
+
+func (w *HTMLWriter) Before(d *Document) {
+	w.document = d
+	w.log = d.Log
+	w.WriteOutline(d)
+}
+
+func (w *HTMLWriter) After(d *Document) {
+	w.WriteFootnotes(d)
+}
+
+func (w *HTMLWriter) WriteComment(Comment)               {}
+func (w *HTMLWriter) WritePropertyDrawer(PropertyDrawer) {}
+
+func (w *HTMLWriter) WriteBlock(b Block) {
+	content := ""
+	if isRawTextBlock(b.Name) {
+		exportWriter := w.emptyClone()
+		exportWriter.htmlEscape = false
+		WriteNodes(exportWriter, b.Children...)
+		content = strings.TrimRightFunc(exportWriter.String(), unicode.IsSpace)
+	} else {
+		content = w.nodesAsString(b.Children...)
+	}
+	switch name := b.Name; {
+	case name == "SRC":
+		lang := "text"
+		if len(b.Parameters) >= 1 {
+			lang = strings.ToLower(b.Parameters[0])
+		}
+		content = w.HighlightCodeBlock(content, lang)
+		w.WriteString(fmt.Sprintf("<div class=\"src src-%s\">\n%s\n</div>\n", lang, content))
+	case name == "EXAMPLE":
+		w.WriteString(`<pre class="example">` + "\n" + content + "\n</pre>\n")
+	case name == "EXPORT" && len(b.Parameters) >= 1 && strings.ToLower(b.Parameters[0]) == "html":
+		w.WriteString(content + "\n")
+	case name == "QUOTE":
+		w.WriteString("<blockquote>\n" + content + "</blockquote>\n")
+	case name == "CENTER":
+		w.WriteString(`<div class="center-block" style="text-align: center; margin-left: auto; margin-right: auto;">` + "\n")
+		w.WriteString(content + "</div>\n")
+	default:
+		w.WriteString(fmt.Sprintf(`<div class="%s-block">`, strings.ToLower(b.Name)) + "\n")
+		w.WriteString(content + "</div>\n")
+	}
+}
+
+func (w *HTMLWriter) WriteDrawer(d Drawer) {
+	WriteNodes(w, d.Children...)
+}
+
+func (w *HTMLWriter) WriteKeyword(k Keyword) {
+	if k.Key == "HTML" {
+		w.WriteString(k.Value + "\n")
+	}
+}
+
+func (w *HTMLWriter) WriteInclude(i Include) {
+	WriteNodes(w, i.Resolve())
+}
+
+func (w *HTMLWriter) WriteFootnoteDefinition(f FootnoteDefinition) {
+	w.footnotes.updateDefinition(f)
+}
+
+func (w *HTMLWriter) WriteFootnotes(d *Document) {
+	if !w.document.GetOption("f") || len(w.footnotes.list) == 0 {
+		return
+	}
+	w.WriteString(`<div class="footnotes">` + "\n")
+	w.WriteString(`<hr class="footnotes-separatator">` + "\n")
+	w.WriteString(`<div class="footnote-definitions">` + "\n")
+	for i, definition := range w.footnotes.list {
+		id := i + 1
+		if definition == nil {
+			name := ""
+			for k, v := range w.footnotes.mapping {
+				if v == i {
+					name = k
+				}
+			}
+			w.log.Printf("Missing footnote definition for [fn:%s] (#%d)", name, id)
+			continue
+		}
+		w.WriteString(`<div class="footnote-definition">` + "\n")
+		w.WriteString(fmt.Sprintf(`<sup id="footnote-%d"><a href="#footnote-reference-%d">%d</a></sup>`, id, id, id) + "\n")
+		w.WriteString(`<div class="footnote-body">` + "\n")
+		WriteNodes(w, definition.Children...)
+		w.WriteString("</div>\n</div>\n")
+	}
+	w.WriteString("</div>\n</div>\n")
+}
+
+func (w *HTMLWriter) WriteOutline(d *Document) {
+	if w.document.GetOption("toc") && len(d.Outline.Children) != 0 {
+		w.WriteString("<nav>\n<ul>\n")
+		for _, section := range d.Outline.Children {
+			w.writeSection(section)
+		}
+		w.WriteString("</ul>\n</nav>\n")
+	}
+}
+
+func (w *HTMLWriter) writeSection(section *Section) {
+	// NOTE: To satisfy hugo ExtractTOC() check we cannot use `<li>\n` here. Doesn't really matter, just a note.
+	w.WriteString("<li>")
+	h := section.Headline
+	title := cleanHeadlineTitleForHTMLAnchorRegexp.ReplaceAllString(w.nodesAsString(h.Title...), "")
+	w.WriteString(fmt.Sprintf("<a href=\"#%s\">%s</a>\n", h.ID(), title))
+	if len(section.Children) != 0 {
+		w.WriteString("<ul>\n")
+		for _, section := range section.Children {
+			w.writeSection(section)
+		}
+		w.WriteString("</ul>\n")
+	}
+	w.WriteString("</li>\n")
+}
+
+func (w *HTMLWriter) WriteHeadline(h Headline) {
+	for _, excludeTag := range strings.Fields(w.document.Get("EXCLUDE_TAGS")) {
+		for _, tag := range h.Tags {
+			if excludeTag == tag {
+				return
+			}
+		}
+	}
+
+	w.WriteString(fmt.Sprintf(`<h%d id="%s">`, h.Lvl, h.ID()) + "\n")
+	if w.document.GetOption("todo") && h.Status != "" {
+		w.WriteString(fmt.Sprintf(`<span class="todo">%s</span>`, h.Status) + "\n")
+	}
+	if w.document.GetOption("pri") && h.Priority != "" {
+		w.WriteString(fmt.Sprintf(`<span class="priority">[%s]</span>`, h.Priority) + "\n")
+	}
+
+	WriteNodes(w, h.Title...)
+	if w.document.GetOption("tags") && len(h.Tags) != 0 {
+		tags := make([]string, len(h.Tags))
+		for i, tag := range h.Tags {
+			tags[i] = fmt.Sprintf(`<span>%s</span>`, tag)
+		}
+		w.WriteString("&#xa0;&#xa0;&#xa0;")
+		w.WriteString(fmt.Sprintf(`<span class="tags">%s</span>`, strings.Join(tags, "&#xa0;")))
+	}
+	w.WriteString(fmt.Sprintf("\n</h%d>\n", h.Lvl))
+	WriteNodes(w, h.Children...)
+}
+
+func (w *HTMLWriter) WriteText(t Text) {
+	if !w.htmlEscape {
+		w.WriteString(t.Content)
+	} else if !w.document.GetOption("e") || t.IsRaw {
+		w.WriteString(html.EscapeString(t.Content))
+	} else {
+		w.WriteString(html.EscapeString(htmlEntityReplacer.Replace(t.Content)))
+	}
+}
+
+func (w *HTMLWriter) WriteEmphasis(e Emphasis) {
+	tags, ok := emphasisTags[e.Kind]
+	if !ok {
+		panic(fmt.Sprintf("bad emphasis %#v", e))
+	}
+	w.WriteString(tags[0])
+	WriteNodes(w, e.Content...)
+	w.WriteString(tags[1])
+}
+
+func (w *HTMLWriter) WriteLatexFragment(l LatexFragment) {
+	w.WriteString(l.OpeningPair)
+	WriteNodes(w, l.Content...)
+	w.WriteString(l.ClosingPair)
+}
+
+func (w *HTMLWriter) WriteStatisticToken(s StatisticToken) {
+	w.WriteString(fmt.Sprintf(`<code class="statistic">[%s]</code>`, s.Content))
+}
+
+func (w *HTMLWriter) WriteLineBreak(l LineBreak) {
+	w.WriteString(strings.Repeat("\n", l.Count))
+}
+
+func (w *HTMLWriter) WriteExplicitLineBreak(l ExplicitLineBreak) {
+	w.WriteString("<br>\n")
+}
+
+func (w *HTMLWriter) WriteFootnoteLink(l FootnoteLink) {
+	if !w.document.GetOption("f") {
+		return
+	}
+	i := w.footnotes.add(l)
+	id := i + 1
+	w.WriteString(fmt.Sprintf(`<sup class="footnote-reference"><a id="footnote-reference-%d" href="#footnote-%d">%d</a></sup>`, id, id, id))
+}
+
+func (w *HTMLWriter) WriteTimestamp(t Timestamp) {
+	if !w.document.GetOption("<") {
+		return
+	}
+	w.WriteString(`<span class="timestamp">&lt;`)
+	if t.IsDate {
+		w.WriteString(t.Time.Format(datestampFormat))
+	} else {
+		w.WriteString(t.Time.Format(timestampFormat))
+	}
+	if t.Interval != "" {
+		w.WriteString(" " + t.Interval)
+	}
+	w.WriteString(`&gt;</span>`)
+}
+
+func (w *HTMLWriter) WriteRegularLink(l RegularLink) {
+	url := html.EscapeString(l.URL)
+	if l.Protocol == "file" {
+		url = url[len("file:"):]
+	}
+	description := url
+	if l.Description != nil {
+		description = w.nodesAsString(l.Description...)
+	}
+	switch l.Kind() {
+	case "image":
+		w.WriteString(fmt.Sprintf(`<img src="%s" alt="%s" title="%s" />`, url, description, description))
+	case "video":
+		w.WriteString(fmt.Sprintf(`<video src="%s" title="%s">%s</video>`, url, description, description))
+	default:
+		w.WriteString(fmt.Sprintf(`<a href="%s">%s</a>`, url, description))
+	}
+}
+
+func (w *HTMLWriter) WriteList(l List) {
+	tags, ok := listTags[l.Kind]
+	if !ok {
+		panic(fmt.Sprintf("bad list kind %#v", l))
+	}
+	w.WriteString(tags[0] + "\n")
+	WriteNodes(w, l.Items...)
+	w.WriteString(tags[1] + "\n")
+}
+
+func (w *HTMLWriter) WriteListItem(li ListItem) {
+	if li.Status != "" {
+		w.WriteString(fmt.Sprintf("<li class=\"%s\">\n", listItemStatuses[li.Status]))
+	} else {
+		w.WriteString("<li>\n")
+	}
+	WriteNodes(w, li.Children...)
+	w.WriteString("</li>\n")
+}
+
+func (w *HTMLWriter) WriteDescriptiveListItem(di DescriptiveListItem) {
+	if di.Status != "" {
+		w.WriteString(fmt.Sprintf("<dt class=\"%s\">\n", listItemStatuses[di.Status]))
+	} else {
+		w.WriteString("<dt>\n")
+	}
+
+	if len(di.Term) != 0 {
+		WriteNodes(w, di.Term...)
+	} else {
+		w.WriteString("?")
+	}
+	w.WriteString("\n</dt>\n")
+	w.WriteString("<dd>\n")
+	WriteNodes(w, di.Details...)
+	w.WriteString("</dd>\n")
+}
+
+func (w *HTMLWriter) WriteParagraph(p Paragraph) {
+	if len(p.Children) == 0 {
+		return
+	}
+	w.WriteString("<p>")
+	if _, ok := p.Children[0].(LineBreak); !ok {
+		w.WriteString("\n")
+	}
+	WriteNodes(w, p.Children...)
+	w.WriteString("\n</p>\n")
+}
+
+func (w *HTMLWriter) WriteExample(e Example) {
+	w.WriteString(`<pre class="example">` + "\n")
+	if len(e.Children) != 0 {
+		for _, n := range e.Children {
+			WriteNodes(w, n)
+			w.WriteString("\n")
+		}
+	}
+	w.WriteString("</pre>\n")
+}
+
+func (w *HTMLWriter) WriteHorizontalRule(h HorizontalRule) {
+	w.WriteString("<hr>\n")
+}
+
+func (w *HTMLWriter) WriteNodeWithMeta(n NodeWithMeta) {
+	out := w.nodesAsString(n.Node)
+	if p, ok := n.Node.(Paragraph); ok {
+		if len(p.Children) == 1 && isImageOrVideoLink(p.Children[0]) {
+			out = w.nodesAsString(p.Children[0])
+		}
+	}
+	for _, attributes := range n.Meta.HTMLAttributes {
+		out = w.withHTMLAttributes(out, attributes...) + "\n"
+	}
+	if len(n.Meta.Caption) != 0 {
+		caption := ""
+		for i, ns := range n.Meta.Caption {
+			if i != 0 {
+				caption += " "
+			}
+			caption += w.nodesAsString(ns...)
+		}
+		out = fmt.Sprintf("<figure>\n%s<figcaption>\n%s\n</figcaption>\n</figure>\n", out, caption)
+	}
+	w.WriteString(out)
+}
+
+func (w *HTMLWriter) WriteNodeWithName(n NodeWithName) {
+	WriteNodes(w, n.Node)
+}
+
+func (w *HTMLWriter) WriteTable(t Table) {
+	w.WriteString("<table>\n")
+	beforeFirstContentRow := true
+	for i, row := range t.Rows {
+		if row.IsSpecial || len(row.Columns) == 0 {
+			continue
+		}
+		if beforeFirstContentRow {
+			beforeFirstContentRow = false
+			if i+1 < len(t.Rows) && len(t.Rows[i+1].Columns) == 0 {
+				w.WriteString("<thead>\n")
+				w.writeTableColumns(row.Columns, "th")
+				w.WriteString("</thead>\n<tbody>\n")
+				continue
+			} else {
+				w.WriteString("<tbody>\n")
+			}
+		}
+		w.writeTableColumns(row.Columns, "td")
+	}
+	w.WriteString("</tbody>\n</table>\n")
+}
+
+func (w *HTMLWriter) writeTableColumns(columns []Column, tag string) {
+	w.WriteString("<tr>\n")
+	for _, column := range columns {
+		if column.Align == "" {
+			w.WriteString(fmt.Sprintf("<%s>", tag))
+		} else {
+			w.WriteString(fmt.Sprintf(`<%s class="align-%s">`, tag, column.Align))
+		}
+		WriteNodes(w, column.Children...)
+		w.WriteString(fmt.Sprintf("</%s>\n", tag))
+	}
+	w.WriteString("</tr>\n")
+}
+
+func (w *HTMLWriter) withHTMLAttributes(input string, kvs ...string) string {
+	if len(kvs)%2 != 0 {
+		w.log.Printf("withHTMLAttributes: Len of kvs must be even: %#v", kvs)
+		return input
+	}
+	context := &h.Node{Type: h.ElementNode, Data: "body", DataAtom: atom.Body}
+	nodes, err := h.ParseFragment(strings.NewReader(strings.TrimSpace(input)), context)
+	if err != nil || len(nodes) != 1 {
+		w.log.Printf("withHTMLAttributes: Could not extend attributes of %s: %v (%s)", input, nodes, err)
+		return input
+	}
+	out, node := strings.Builder{}, nodes[0]
+	for i := 0; i < len(kvs)-1; i += 2 {
+		node.Attr = setHTMLAttribute(node.Attr, strings.TrimPrefix(kvs[i], ":"), kvs[i+1])
+	}
+	err = h.Render(&out, nodes[0])
+	if err != nil {
+		w.log.Printf("withHTMLAttributes: Could not extend attributes of %s: %v (%s)", input, node, err)
+		return input
+	}
+	return out.String()
+}
+
+func setHTMLAttribute(attributes []h.Attribute, k, v string) []h.Attribute {
+	for i, a := range attributes {
+		if strings.ToLower(a.Key) == strings.ToLower(k) {
+			switch strings.ToLower(k) {
+			case "class", "style":
+				attributes[i].Val += " " + v
+			default:
+				attributes[i].Val = v
+			}
+			return attributes
+		}
+	}
+	return append(attributes, h.Attribute{Namespace: "", Key: k, Val: v})
+}
+
+func (fs *footnotes) add(f FootnoteLink) int {
+	if i, ok := fs.mapping[f.Name]; ok && f.Name != "" {
+		return i
+	}
+	fs.list = append(fs.list, f.Definition)
+	i := len(fs.list) - 1
+	if f.Name != "" {
+		fs.mapping[f.Name] = i
+	}
+	return i
+}
+
+func (fs *footnotes) updateDefinition(f FootnoteDefinition) {
+	if i, ok := fs.mapping[f.Name]; ok {
+		fs.list[i] = &f
+	}
+}

vendor/github.com/niklasfasching/go-org/org/inline.go

@@ -0,0 +1,357 @@
+package org
+
+import (
+	"fmt"
+	"path"
+	"regexp"
+	"strings"
+	"time"
+	"unicode"
+)
+
+type Text struct {
+	Content string
+	IsRaw   bool
+}
+
+type LineBreak struct{ Count int }
+type ExplicitLineBreak struct{}
+
+type StatisticToken struct{ Content string }
+
+type Timestamp struct {
+	Time     time.Time
+	IsDate   bool
+	Interval string
+}
+
+type Emphasis struct {
+	Kind    string
+	Content []Node
+}
+
+type LatexFragment struct {
+	OpeningPair string
+	ClosingPair string
+	Content     []Node
+}
+
+type FootnoteLink struct {
+	Name       string
+	Definition *FootnoteDefinition
+}
+
+type RegularLink struct {
+	Protocol    string
+	Description []Node
+	URL         string
+	AutoLink    bool
+}
+
+var validURLCharacters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~:/?#[]@!$&'()*+,;="
+var autolinkProtocols = regexp.MustCompile(`^(https?|ftp|file)$`)
+var imageExtensionRegexp = regexp.MustCompile(`^[.](png|gif|jpe?g|svg|tiff?)$`)
+var videoExtensionRegexp = regexp.MustCompile(`^[.](webm|mp4)$`)
+
+var subScriptSuperScriptRegexp = regexp.MustCompile(`^([_^]){([^{}]+?)}`)
+var timestampRegexp = regexp.MustCompile(`^<(\d{4}-\d{2}-\d{2})( [A-Za-z]+)?( \d{2}:\d{2})?( \+\d+[dwmy])?>`)
+var footnoteRegexp = regexp.MustCompile(`^\[fn:([\w-]*?)(:(.*?))?\]`)
+var statisticsTokenRegexp = regexp.MustCompile(`^\[(\d+/\d+|\d+%)\]`)
+var latexFragmentRegexp = regexp.MustCompile(`(?s)^\\begin{(\w+)}(.*)\\end{(\w+)}`)
+
+var timestampFormat = "2006-01-02 Mon 15:04"
+var datestampFormat = "2006-01-02 Mon"
+
+var latexFragmentPairs = map[string]string{
+	`\(`: `\)`,
+	`\[`: `\]`,
+	`$$`: `$$`,
+}
+
+func (d *Document) parseInline(input string) (nodes []Node) {
+	previous, current := 0, 0
+	for current < len(input) {
+		rewind, consumed, node := 0, 0, (Node)(nil)
+		switch input[current] {
+		case '^':
+			consumed, node = d.parseSubOrSuperScript(input, current)
+		case '_':
+			consumed, node = d.parseSubScriptOrEmphasis(input, current)
+		case '*', '/', '+':
+			consumed, node = d.parseEmphasis(input, current, false)
+		case '=', '~':
+			consumed, node = d.parseEmphasis(input, current, true)
+		case '[':
+			consumed, node = d.parseOpeningBracket(input, current)
+		case '<':
+			consumed, node = d.parseTimestamp(input, current)
+		case '\\':
+			consumed, node = d.parseExplicitLineBreakOrLatexFragment(input, current)
+		case '$':
+			consumed, node = d.parseLatexFragment(input, current)
+		case '\n':
+			consumed, node = d.parseLineBreak(input, current)
+		case ':':
+			rewind, consumed, node = d.parseAutoLink(input, current)
+			current -= rewind
+		}
+		if consumed != 0 {
+			if current > previous {
+				nodes = append(nodes, Text{input[previous:current], false})
+			}
+			if node != nil {
+				nodes = append(nodes, node)
+			}
+			current += consumed
+			previous = current
+		} else {
+			current++
+		}
+	}
+
+	if previous < len(input) {
+		nodes = append(nodes, Text{input[previous:], false})
+	}
+	return nodes
+}
+
+func (d *Document) parseRawInline(input string) (nodes []Node) {
+	previous, current := 0, 0
+	for current < len(input) {
+		if input[current] == '\n' {
+			consumed, node := d.parseLineBreak(input, current)
+			if current > previous {
+				nodes = append(nodes, Text{input[previous:current], true})
+			}
+			nodes = append(nodes, node)
+			current += consumed
+			previous = current
+		} else {
+			current++
+		}
+	}
+	if previous < len(input) {
+		nodes = append(nodes, Text{input[previous:], true})
+	}
+	return nodes
+}
+
+func (d *Document) parseLineBreak(input string, start int) (int, Node) {
+	i := start
+	for ; i < len(input) && input[i] == '\n'; i++ {
+	}
+	return i - start, LineBreak{i - start}
+}
+
+func (d *Document) parseExplicitLineBreakOrLatexFragment(input string, start int) (int, Node) {
+	switch {
+	case start+2 >= len(input):
+	case input[start+1] == '\\' && start != 0 && input[start-1] != '\n':
+		for i := start + 2; unicode.IsSpace(rune(input[i])); i++ {
+			if i >= len(input) || input[i] == '\n' {
+				return i + 1 - start, ExplicitLineBreak{}
+			}
+		}
+	case input[start+1] == '(' || input[start+1] == '[':
+		return d.parseLatexFragment(input, start)
+	case strings.Index(input[start:], `\begin{`) == 0:
+		if m := latexFragmentRegexp.FindStringSubmatch(input[start:]); m != nil {
+			if open, content, close := m[1], m[2], m[3]; open == close {
+				openingPair, closingPair := `\begin{`+open+`}`, `\end{`+close+`}`
+				i := strings.Index(input[start:], closingPair)
+				return i + len(closingPair), LatexFragment{openingPair, closingPair, d.parseRawInline(content)}
+			}
+		}
+	}
+	return 0, nil
+}
+
+func (d *Document) parseLatexFragment(input string, start int) (int, Node) {
+	if start+2 >= len(input) {
+		return 0, nil
+	}
+	openingPair := input[start : start+2]
+	closingPair := latexFragmentPairs[openingPair]
+	if i := strings.Index(input[start+2:], closingPair); i != -1 {
+		content := d.parseRawInline(input[start+2 : start+2+i])
+		return i + 2 + 2, LatexFragment{openingPair, closingPair, content}
+	}
+	return 0, nil
+}
+
+func (d *Document) parseSubOrSuperScript(input string, start int) (int, Node) {
+	if m := subScriptSuperScriptRegexp.FindStringSubmatch(input[start:]); m != nil {
+		return len(m[2]) + 3, Emphasis{m[1] + "{}", []Node{Text{m[2], false}}}
+	}
+	return 0, nil
+}
+
+func (d *Document) parseSubScriptOrEmphasis(input string, start int) (int, Node) {
+	if consumed, node := d.parseSubOrSuperScript(input, start); consumed != 0 {
+		return consumed, node
+	}
+	return d.parseEmphasis(input, start, false)
+}
+
+func (d *Document) parseOpeningBracket(input string, start int) (int, Node) {
+	if len(input[start:]) >= 2 && input[start] == '[' && input[start+1] == '[' {
+		return d.parseRegularLink(input, start)
+	} else if footnoteRegexp.MatchString(input[start:]) {
+		return d.parseFootnoteReference(input, start)
+	} else if statisticsTokenRegexp.MatchString(input[start:]) {
+		return d.parseStatisticToken(input, start)
+	}
+	return 0, nil
+}
+
+func (d *Document) parseFootnoteReference(input string, start int) (int, Node) {
+	if m := footnoteRegexp.FindStringSubmatch(input[start:]); m != nil {
+		name, definition := m[1], m[3]
+		if name == "" && definition == "" {
+			return 0, nil
+		}
+		link := FootnoteLink{name, nil}
+		if definition != "" {
+			link.Definition = &FootnoteDefinition{name, []Node{Paragraph{d.parseInline(definition)}}, true}
+		}
+		return len(m[0]), link
+	}
+	return 0, nil
+}
+
+func (d *Document) parseStatisticToken(input string, start int) (int, Node) {
+	if m := statisticsTokenRegexp.FindStringSubmatch(input[start:]); m != nil {
+		return len(m[1]) + 2, StatisticToken{m[1]}
+	}
+	return 0, nil
+}
+
+func (d *Document) parseAutoLink(input string, start int) (int, int, Node) {
+	if !d.AutoLink || start == 0 || len(input[start:]) < 3 || input[start:start+3] != "://" {
+		return 0, 0, nil
+	}
+	protocolStart, protocol := start-1, ""
+	for ; protocolStart > 0; protocolStart-- {
+		if !unicode.IsLetter(rune(input[protocolStart])) {
+			protocolStart++
+			break
+		}
+	}
+	if m := autolinkProtocols.FindStringSubmatch(input[protocolStart:start]); m != nil {
+		protocol = m[1]
+	} else {
+		return 0, 0, nil
+	}
+	end := start
+	for ; end < len(input) && strings.ContainsRune(validURLCharacters, rune(input[end])); end++ {
+	}
+	path := input[start:end]
+	if path == "://" {
+		return 0, 0, nil
+	}
+	return len(protocol), len(path + protocol), RegularLink{protocol, nil, protocol + path, true}
+}
+
+func (d *Document) parseRegularLink(input string, start int) (int, Node) {
+	input = input[start:]
+	if len(input) < 3 || input[:2] != "[[" || input[2] == '[' {
+		return 0, nil
+	}
+	end := strings.Index(input, "]]")
+	if end == -1 {
+		return 0, nil
+	}
+	rawLinkParts := strings.Split(input[2:end], "][")
+	description, link := ([]Node)(nil), rawLinkParts[0]
+	if len(rawLinkParts) == 2 {
+		link, description = rawLinkParts[0], d.parseInline(rawLinkParts[1])
+	}
+	if strings.ContainsRune(link, '\n') {
+		return 0, nil
+	}
+	consumed := end + 2
+	protocol, linkParts := "", strings.SplitN(link, ":", 2)
+	if len(linkParts) == 2 {
+		protocol = linkParts[0]
+	}
+	return consumed, RegularLink{protocol, description, link, false}
+}
+
+func (d *Document) parseTimestamp(input string, start int) (int, Node) {
+	if m := timestampRegexp.FindStringSubmatch(input[start:]); m != nil {
+		ddmmyy, hhmm, interval, isDate := m[1], m[3], strings.TrimSpace(m[4]), false
+		if hhmm == "" {
+			hhmm, isDate = "00:00", true
+		}
+		t, err := time.Parse(timestampFormat, fmt.Sprintf("%s Mon %s", ddmmyy, hhmm))
+		if err != nil {
+			return 0, nil
+		}
+		timestamp := Timestamp{t, isDate, interval}
+		return len(m[0]), timestamp
+	}
+	return 0, nil
+}
+
+func (d *Document) parseEmphasis(input string, start int, isRaw bool) (int, Node) {
+	marker, i := input[start], start
+	if !hasValidPreAndBorderChars(input, i) {
+		return 0, nil
+	}
+	for i, consumedNewLines := i+1, 0; i < len(input) && consumedNewLines <= d.MaxEmphasisNewLines; i++ {
+		if input[i] == '\n' {
+			consumedNewLines++
+		}
+
+		if input[i] == marker && i != start+1 && hasValidPostAndBorderChars(input, i) {
+			if isRaw {
+				return i + 1 - start, Emphasis{input[start : start+1], d.parseRawInline(input[start+1 : i])}
+			}
+			return i + 1 - start, Emphasis{input[start : start+1], d.parseInline(input[start+1 : i])}
+		}
+	}
+	return 0, nil
+}
+
+// see org-emphasis-regexp-components (emacs elisp variable)
+
+func hasValidPreAndBorderChars(input string, i int) bool {
+	return (i+1 >= len(input) || isValidBorderChar(rune(input[i+1]))) && (i == 0 || isValidPreChar(rune(input[i-1])))
+}
+
+func hasValidPostAndBorderChars(input string, i int) bool {
+	return (i == 0 || isValidBorderChar(rune(input[i-1]))) && (i+1 >= len(input) || isValidPostChar(rune(input[i+1])))
+}
+
+func isValidPreChar(r rune) bool {
+	return unicode.IsSpace(r) || strings.ContainsRune(`-({'"`, r)
+}
+
+func isValidPostChar(r rune) bool {
+	return unicode.IsSpace(r) || strings.ContainsRune(`-.,:!?;'")}[`, r)
+}
+
+func isValidBorderChar(r rune) bool { return !unicode.IsSpace(r) }
+
+func (l RegularLink) Kind() string {
+	if p := l.Protocol; l.Description != nil || (p != "" && p != "file" && p != "http" && p != "https") {
+		return "regular"
+	}
+	if imageExtensionRegexp.MatchString(path.Ext(l.URL)) {
+		return "image"
+	}
+	if videoExtensionRegexp.MatchString(path.Ext(l.URL)) {
+		return "video"
+	}
+	return "regular"
+}
+
+func (n Text) String() string              { return orgWriter.nodesAsString(n) }
+func (n LineBreak) String() string         { return orgWriter.nodesAsString(n) }
+func (n ExplicitLineBreak) String() string { return orgWriter.nodesAsString(n) }
+func (n StatisticToken) String() string    { return orgWriter.nodesAsString(n) }
+func (n Emphasis) String() string          { return orgWriter.nodesAsString(n) }
+func (n LatexFragment) String() string     { return orgWriter.nodesAsString(n) }
+func (n FootnoteLink) String() string      { return orgWriter.nodesAsString(n) }
+func (n RegularLink) String() string       { return orgWriter.nodesAsString(n) }
+func (n Timestamp) String() string         { return orgWriter.nodesAsString(n) }

vendor/github.com/niklasfasching/go-org/org/keyword.go

@@ -0,0 +1,184 @@
+package org
+
+import (
+	"bytes"
+	"path/filepath"
+	"regexp"
+	"strings"
+)
+
+type Comment struct{ Content string }
+
+type Keyword struct {
+	Key   string
+	Value string
+}
+
+type NodeWithName struct {
+	Name string
+	Node Node
+}
+
+type NodeWithMeta struct {
+	Node Node
+	Meta Metadata
+}
+
+type Metadata struct {
+	Caption        [][]Node
+	HTMLAttributes [][]string
+}
+
+type Include struct {
+	Keyword
+	Resolve func() Node
+}
+
+var keywordRegexp = regexp.MustCompile(`^(\s*)#\+([^:]+):(\s+(.*)|$)`)
+var commentRegexp = regexp.MustCompile(`^(\s*)#(.*)`)
+
+var includeFileRegexp = regexp.MustCompile(`(?i)^"([^"]+)" (src|example|export) (\w+)$`)
+var attributeRegexp = regexp.MustCompile(`(?:^|\s+)(:[-\w]+)\s+(.*)$`)
+
+func lexKeywordOrComment(line string) (token, bool) {
+	if m := keywordRegexp.FindStringSubmatch(line); m != nil {
+		return token{"keyword", len(m[1]), m[2], m}, true
+	} else if m := commentRegexp.FindStringSubmatch(line); m != nil {
+		return token{"comment", len(m[1]), m[2], m}, true
+	}
+	return nilToken, false
+}
+
+func (d *Document) parseComment(i int, stop stopFn) (int, Node) {
+	return 1, Comment{d.tokens[i].content}
+}
+
+func (d *Document) parseKeyword(i int, stop stopFn) (int, Node) {
+	k := parseKeyword(d.tokens[i])
+	switch k.Key {
+	case "NAME":
+		return d.parseNodeWithName(k, i, stop)
+	case "SETUPFILE":
+		return d.loadSetupFile(k)
+	case "INCLUDE":
+		return d.parseInclude(k)
+	case "CAPTION", "ATTR_HTML":
+		consumed, node := d.parseAffiliated(i, stop)
+		if consumed != 0 {
+			return consumed, node
+		}
+		fallthrough
+	default:
+		if _, ok := d.BufferSettings[k.Key]; ok {
+			d.BufferSettings[k.Key] = strings.Join([]string{d.BufferSettings[k.Key], k.Value}, "\n")
+		} else {
+			d.BufferSettings[k.Key] = k.Value
+		}
+		return 1, k
+	}
+}
+
+func (d *Document) parseNodeWithName(k Keyword, i int, stop stopFn) (int, Node) {
+	if stop(d, i+1) {
+		return 0, nil
+	}
+	consumed, node := d.parseOne(i+1, stop)
+	if consumed == 0 || node == nil {
+		return 0, nil
+	}
+	d.NamedNodes[k.Value] = node
+	return consumed + 1, NodeWithName{k.Value, node}
+}
+
+func (d *Document) parseAffiliated(i int, stop stopFn) (int, Node) {
+	start, meta := i, Metadata{}
+	for ; !stop(d, i) && d.tokens[i].kind == "keyword"; i++ {
+		switch k := parseKeyword(d.tokens[i]); k.Key {
+		case "CAPTION":
+			meta.Caption = append(meta.Caption, d.parseInline(k.Value))
+		case "ATTR_HTML":
+			attributes, rest := []string{}, k.Value
+			for {
+				if k, m := "", attributeRegexp.FindStringSubmatch(rest); m != nil {
+					k, rest = m[1], m[2]
+					attributes = append(attributes, k)
+					if v, m := "", attributeRegexp.FindStringSubmatchIndex(rest); m != nil {
+						v, rest = rest[:m[0]], rest[m[0]:]
+						attributes = append(attributes, v)
+					} else {
+						attributes = append(attributes, strings.TrimSpace(rest))
+						break
+					}
+				} else {
+					break
+				}
+			}
+			meta.HTMLAttributes = append(meta.HTMLAttributes, attributes)
+		default:
+			return 0, nil
+		}
+	}
+	if stop(d, i) {
+		return 0, nil
+	}
+	consumed, node := d.parseOne(i, stop)
+	if consumed == 0 || node == nil {
+		return 0, nil
+	}
+	i += consumed
+	return i - start, NodeWithMeta{node, meta}
+}
+
+func parseKeyword(t token) Keyword {
+	k, v := t.matches[2], t.matches[4]
+	return Keyword{strings.ToUpper(k), strings.TrimSpace(v)}
+}
+
+func (d *Document) parseInclude(k Keyword) (int, Node) {
+	resolve := func() Node {
+		d.Log.Printf("Bad include %#v", k)
+		return k
+	}
+	if m := includeFileRegexp.FindStringSubmatch(k.Value); m != nil {
+		path, kind, lang := m[1], m[2], m[3]
+		if !filepath.IsAbs(path) {
+			path = filepath.Join(filepath.Dir(d.Path), path)
+		}
+		resolve = func() Node {
+			bs, err := d.ReadFile(path)
+			if err != nil {
+				d.Log.Printf("Bad include %#v: %s", k, err)
+				return k
+			}
+			return Block{strings.ToUpper(kind), []string{lang}, d.parseRawInline(string(bs))}
+		}
+	}
+	return 1, Include{k, resolve}
+}
+
+func (d *Document) loadSetupFile(k Keyword) (int, Node) {
+	path := k.Value
+	if !filepath.IsAbs(path) {
+		path = filepath.Join(filepath.Dir(d.Path), path)
+	}
+	bs, err := d.ReadFile(path)
+	if err != nil {
+		d.Log.Printf("Bad setup file: %#v: %s", k, err)
+		return 1, k
+	}
+	setupDocument := d.Configuration.Parse(bytes.NewReader(bs), path)
+	if err := setupDocument.Error; err != nil {
+		d.Log.Printf("Bad setup file: %#v: %s", k, err)
+		return 1, k
+	}
+	for k, v := range setupDocument.BufferSettings {
+		d.BufferSettings[k] = v
+	}
+	return 1, k
+}
+
+func (n Comment) String() string      { return orgWriter.nodesAsString(n) }
+func (n Keyword) String() string      { return orgWriter.nodesAsString(n) }
+func (n NodeWithMeta) String() string { return orgWriter.nodesAsString(n) }
+func (n NodeWithName) String() string { return orgWriter.nodesAsString(n) }
+func (n Include) String() string      { return orgWriter.nodesAsString(n) }

vendor/github.com/niklasfasching/go-org/org/list.go

@@ -0,0 +1,114 @@
+package org
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+	"unicode"
+)
+
+type List struct {
+	Kind  string
+	Items []Node
+}
+
+type ListItem struct {
+	Bullet   string
+	Status   string
+	Children []Node
+}
+
+type DescriptiveListItem struct {
+	Bullet  string
+	Status  string
+	Term    []Node
+	Details []Node
+}
+
+var unorderedListRegexp = regexp.MustCompile(`^(\s*)([+*-])(\s+(.*)|$)`)
+var orderedListRegexp = regexp.MustCompile(`^(\s*)(([0-9]+|[a-zA-Z])[.)])(\s+(.*)|$)`)
+var descriptiveListItemRegexp = regexp.MustCompile(`\s::(\s|$)`)
+var listItemStatusRegexp = regexp.MustCompile(`\[( |X|-)\]\s`)
+
+func lexList(line string) (token, bool) {
+	if m := unorderedListRegexp.FindStringSubmatch(line); m != nil {
+		return token{"unorderedList", len(m[1]), m[4], m}, true
+	} else if m := orderedListRegexp.FindStringSubmatch(line); m != nil {
+		return token{"orderedList", len(m[1]), m[5], m}, true
+	}
+	return nilToken, false
+}
+
+func isListToken(t token) bool {
+	return t.kind == "unorderedList" || t.kind == "orderedList"
+}
+
+func listKind(t token) (string, string) {
+	kind := ""
+	switch bullet := t.matches[2]; {
+	case bullet == "*" || bullet == "+" || bullet == "-":
+		kind = "unordered"
+	case unicode.IsLetter(rune(bullet[0])), unicode.IsDigit(rune(bullet[0])):
+		kind = "ordered"
+	default:
+		panic(fmt.Sprintf("bad list bullet '%s': %#v", bullet, t))
+	}
+	if descriptiveListItemRegexp.MatchString(t.content) {
+		return kind, "descriptive"
+	}
+	return kind, kind
+}
+
+func (d *Document) parseList(i int, parentStop stopFn) (int, Node) {
+	start, lvl := i, d.tokens[i].lvl
+	listMainKind, kind := listKind(d.tokens[i])
+	list := List{Kind: kind}
+	stop := func(*Document, int) bool {
+		if parentStop(d, i) || d.tokens[i].lvl != lvl || !isListToken(d.tokens[i]) {
+			return true
+		}
+		itemMainKind, _ := listKind(d.tokens[i])
+		return itemMainKind != listMainKind
+	}
+	for !stop(d, i) {
+		consumed, node := d.parseListItem(list, i, parentStop)
+		i += consumed
+		list.Items = append(list.Items, node)
+	}
+	return i - start, list
+}
+
+func (d *Document) parseListItem(l List, i int, parentStop stopFn) (int, Node) {
+	start, nodes, bullet := i, []Node{}, d.tokens[i].matches[2]
+	minIndent, dterm, content, status := d.tokens[i].lvl+len(bullet), "", d.tokens[i].content, ""
+	if m := listItemStatusRegexp.FindStringSubmatch(content); m != nil {
+		status, content = m[1], content[len("[ ] "):]
+	}
+	if l.Kind == "descriptive" {
+		if m := descriptiveListItemRegexp.FindStringIndex(content); m != nil {
+			dterm, content = content[:m[0]], content[m[1]:]
+		}
+	}
+
+	d.tokens[i] = tokenize(strings.Repeat(" ", minIndent) + content)
+	stop := func(d *Document, i int) bool {
+		if parentStop(d, i) {
+			return true
+		}
+		t := d.tokens[i]
+		return t.lvl < minIndent && !(t.kind == "text" && t.content == "")
+	}
+	for !stop(d, i) && (i <= start+1 || !isSecondBlankLine(d, i)) {
+		consumed, node := d.parseOne(i, stop)
+		i += consumed
+		nodes = append(nodes, node)
+	}
+	if l.Kind == "descriptive" {
+		return i - start, DescriptiveListItem{bullet, status, d.parseInline(dterm), nodes}
+	}
+	return i - start, ListItem{bullet, status, nodes}
+}
+
+func (n List) String() string                { return orgWriter.nodesAsString(n) }
+func (n ListItem) String() string            { return orgWriter.nodesAsString(n) }
+func (n DescriptiveListItem) String() string { return orgWriter.nodesAsString(n) }

vendor/github.com/niklasfasching/go-org/org/org_writer.go

@@ -0,0 +1,334 @@
+package org
+
+import (
+	"fmt"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+)
+
+// OrgWriter export an org document into pretty printed org document.
+type OrgWriter struct {
+	ExtendingWriter Writer
+	TagsColumn      int
+
+	strings.Builder
+	indent string
+}
+
+var emphasisOrgBorders = map[string][]string{
+	"_":   []string{"_", "_"},
+	"*":   []string{"*", "*"},
+	"/":   []string{"/", "/"},
+	"+":   []string{"+", "+"},
+	"~":   []string{"~", "~"},
+	"=":   []string{"=", "="},
+	"_{}": []string{"_{", "}"},
+	"^{}": []string{"^{", "}"},
+}
+
+func NewOrgWriter() *OrgWriter {
+	return &OrgWriter{
+		TagsColumn: 77,
+	}
+}
+
+func (w *OrgWriter) WriterWithExtensions() Writer {
+	if w.ExtendingWriter != nil {
+		return w.ExtendingWriter
+	}
+	return w
+}
+
+func (w *OrgWriter) Before(d *Document) {}
+func (w *OrgWriter) After(d *Document)  {}
+
+func (w *OrgWriter) emptyClone() *OrgWriter {
+	wcopy := *w
+	wcopy.Builder = strings.Builder{}
+	return &wcopy
+}
+
+func (w *OrgWriter) nodesAsString(nodes ...Node) string {
+	tmp := w.emptyClone()
+	WriteNodes(tmp, nodes...)
+	return tmp.String()
+}
+
+func (w *OrgWriter) WriteHeadline(h Headline) {
+	tmp := w.emptyClone()
+	tmp.WriteString(strings.Repeat("*", h.Lvl))
+	if h.Status != "" {
+		tmp.WriteString(" " + h.Status)
+	}
+	if h.Priority != "" {
+		tmp.WriteString(" [#" + h.Priority + "]")
+	}
+	tmp.WriteString(" ")
+	WriteNodes(tmp, h.Title...)
+	hString := tmp.String()
+	if len(h.Tags) != 0 {
+		tString := ":" + strings.Join(h.Tags, ":") + ":"
+		if n := w.TagsColumn - len(tString) - len(hString); n > 0 {
+			w.WriteString(hString + strings.Repeat(" ", n) + tString)
+		} else {
+			w.WriteString(hString + " " + tString)
+		}
+	} else {
+		w.WriteString(hString)
+	}
+	w.WriteString("\n")
+	if len(h.Children) != 0 {
+		w.WriteString(w.indent)
+	}
+	if h.Properties != nil {
+		WriteNodes(w, *h.Properties)
+	}
+	WriteNodes(w, h.Children...)
+}
+
+func (w *OrgWriter) WriteBlock(b Block) {
+	w.WriteString(w.indent + "#+BEGIN_" + b.Name)
+	if len(b.Parameters) != 0 {
+		w.WriteString(" " + strings.Join(b.Parameters, " "))
+	}
+	w.WriteString("\n")
+	if isRawTextBlock(b.Name) {
+		w.WriteString(w.indent)
+	}
+	WriteNodes(w, b.Children...)
+	if !isRawTextBlock(b.Name) {
+		w.WriteString(w.indent)
+	}
+	w.WriteString("#+END_" + b.Name + "\n")
+}
+
+func (w *OrgWriter) WriteDrawer(d Drawer) {
+	w.WriteString(w.indent + ":" + d.Name + ":\n")
+	WriteNodes(w, d.Children...)
+	w.WriteString(w.indent + ":END:\n")
+}
+
+func (w *OrgWriter) WritePropertyDrawer(d PropertyDrawer) {
+	w.WriteString(":PROPERTIES:\n")
+	for _, kvPair := range d.Properties {
+		k, v := kvPair[0], kvPair[1]
+		if v != "" {
+			v = " " + v
+		}
+		w.WriteString(fmt.Sprintf(":%s:%s\n", k, v))
+	}
+	w.WriteString(":END:\n")
+}
+
+func (w *OrgWriter) WriteFootnoteDefinition(f FootnoteDefinition) {
+	w.WriteString(fmt.Sprintf("[fn:%s]", f.Name))
+	content := w.nodesAsString(f.Children...)
+	if content != "" && !unicode.IsSpace(rune(content[0])) {
+		w.WriteString(" ")
+	}
+	w.WriteString(content)
+}
+
+func (w *OrgWriter) WriteParagraph(p Paragraph) {
+	content := w.nodesAsString(p.Children...)
+	if len(content) > 0 && content[0] != '\n' {
+		w.WriteString(w.indent)
+	}
+	w.WriteString(content + "\n")
+}
+
+func (w *OrgWriter) WriteExample(e Example) {
+	for _, n := range e.Children {
+		w.WriteString(w.indent + ":")
+		if content := w.nodesAsString(n); content != "" {
+			w.WriteString(" " + content)
+		}
+		w.WriteString("\n")
+	}
+}
+
+func (w *OrgWriter) WriteKeyword(k Keyword) {
+	w.WriteString(w.indent + "#+" + k.Key + ":")
+	if k.Value != "" {
+		w.WriteString(" " + k.Value)
+	}
+	w.WriteString("\n")
+}
+
+func (w *OrgWriter) WriteInclude(i Include) {
+	w.WriteKeyword(i.Keyword)
+}
+
+func (w *OrgWriter) WriteNodeWithMeta(n NodeWithMeta) {
+	for _, ns := range n.Meta.Caption {
+		w.WriteString("#+CAPTION: ")
+		WriteNodes(w, ns...)
+		w.WriteString("\n")
+	}
+	for _, attributes := range n.Meta.HTMLAttributes {
+		w.WriteString("#+ATTR_HTML: ")
+		w.WriteString(strings.Join(attributes, " ") + "\n")
+	}
+	WriteNodes(w, n.Node)
+}
+
+func (w *OrgWriter) WriteNodeWithName(n NodeWithName) {
+	w.WriteString(fmt.Sprintf("#+NAME: %s\n", n.Name))
+	WriteNodes(w, n.Node)
+}
+
+func (w *OrgWriter) WriteComment(c Comment) {
+	w.WriteString(w.indent + "#" + c.Content + "\n")
+}
+
+func (w *OrgWriter) WriteList(l List) { WriteNodes(w, l.Items...) }
+
+func (w *OrgWriter) WriteListItem(li ListItem) {
+	liWriter := w.emptyClone()
+	liWriter.indent = w.indent + strings.Repeat(" ", len(li.Bullet)+1)
+	WriteNodes(liWriter, li.Children...)
+	content := strings.TrimPrefix(liWriter.String(), liWriter.indent)
+	w.WriteString(w.indent + li.Bullet)
+	if li.Status != "" {
+		w.WriteString(fmt.Sprintf(" [%s]", li.Status))
+	}
+	if len(content) > 0 && content[0] == '\n' {
+		w.WriteString(content)
+	} else {
+		w.WriteString(" " + content)
+	}
+}
+
+func (w *OrgWriter) WriteDescriptiveListItem(di DescriptiveListItem) {
+	w.WriteString(w.indent + di.Bullet)
+	if di.Status != "" {
+		w.WriteString(fmt.Sprintf(" [%s]", di.Status))
+	}
+	indent := w.indent + strings.Repeat(" ", len(di.Bullet)+1)
+	if len(di.Term) != 0 {
+		term := w.nodesAsString(di.Term...)
+		w.WriteString(" " + term + " ::")
+		indent = indent + strings.Repeat(" ", len(term)+4)
+	}
+	diWriter := w.emptyClone()
+	diWriter.indent = indent
+	WriteNodes(diWriter, di.Details...)
+	details := strings.TrimPrefix(diWriter.String(), diWriter.indent)
+	if len(details) > 0 && details[0] == '\n' {
+		w.WriteString(details)
+	} else {
+		w.WriteString(" " + details)
+	}
+}
+
+func (w *OrgWriter) WriteTable(t Table) {
+	for _, row := range t.Rows {
+		w.WriteString(w.indent)
+		if len(row.Columns) == 0 {
+			w.WriteString(`|`)
+			for i := 0; i < len(t.ColumnInfos); i++ {
+				w.WriteString(strings.Repeat("-", t.ColumnInfos[i].Len+2))
+				if i < len(t.ColumnInfos)-1 {
+					w.WriteString("+")
+				}
+			}
+			w.WriteString(`|`)
+
+		} else {
+			w.WriteString(`|`)
+			for _, column := range row.Columns {
+				w.WriteString(` `)
+				content := w.nodesAsString(column.Children...)
+				if content == "" {
+					content = " "
+				}
+				n := column.Len - utf8.RuneCountInString(content)
+				if n < 0 {
+					n = 0
+				}
+				if column.Align == "center" {
+					if n%2 != 0 {
+						w.WriteString(" ")
+					}
+					w.WriteString(strings.Repeat(" ", n/2) + content + strings.Repeat(" ", n/2))
+				} else if column.Align == "right" {
+					w.WriteString(strings.Repeat(" ", n) + content)
+				} else {
+					w.WriteString(content + strings.Repeat(" ", n))
+				}
+				w.WriteString(` |`)
+			}
+		}
+		w.WriteString("\n")
+	}
+}
+
+func (w *OrgWriter) WriteHorizontalRule(hr HorizontalRule) {
+	w.WriteString(w.indent + "-----\n")
+}
+
+func (w *OrgWriter) WriteText(t Text) { w.WriteString(t.Content) }
+
+func (w *OrgWriter) WriteEmphasis(e Emphasis) {
+	borders, ok := emphasisOrgBorders[e.Kind]
+	if !ok {
+		panic(fmt.Sprintf("bad emphasis %#v", e))
+	}
+	w.WriteString(borders[0])
+	WriteNodes(w, e.Content...)
+	w.WriteString(borders[1])
+}
+
+func (w *OrgWriter) WriteLatexFragment(l LatexFragment) {
+	w.WriteString(l.OpeningPair)
+	WriteNodes(w, l.Content...)
+	w.WriteString(l.ClosingPair)
+}
+
+func (w *OrgWriter) WriteStatisticToken(s StatisticToken) {
+	w.WriteString(fmt.Sprintf("[%s]", s.Content))
+}
+
+func (w *OrgWriter) WriteLineBreak(l LineBreak) {
+	w.WriteString(strings.Repeat("\n"+w.indent, l.Count))
+}
+
+func (w *OrgWriter) WriteExplicitLineBreak(l ExplicitLineBreak) {
+	w.WriteString(`\\` + "\n" + w.indent)
+}
+
+func (w *OrgWriter) WriteTimestamp(t Timestamp) {
+	w.WriteString("<")
+	if t.IsDate {
+		w.WriteString(t.Time.Format(datestampFormat))
+	} else {
+		w.WriteString(t.Time.Format(timestampFormat))
+	}
+	if t.Interval != "" {
+		w.WriteString(" " + t.Interval)
+	}
+	w.WriteString(">")
+}
+
+func (w *OrgWriter) WriteFootnoteLink(l FootnoteLink) {
+	w.WriteString("[fn:" + l.Name)
+	if l.Definition != nil {
+		w.WriteString(":")
+		WriteNodes(w, l.Definition.Children[0].(Paragraph).Children...)
+	}
+	w.WriteString("]")
+}
+
+func (w *OrgWriter) WriteRegularLink(l RegularLink) {
+	if l.AutoLink {
+		w.WriteString(l.URL)
+	} else if l.Description == nil {
+		w.WriteString(fmt.Sprintf("[[%s]]", l.URL))
+	} else {
+		descriptionWriter := w.emptyClone()
+		WriteNodes(descriptionWriter, l.Description...)
+		description := descriptionWriter.String()
+		w.WriteString(fmt.Sprintf("[[%s][%s]]", l.URL, description))
+	}
+}

vendor/github.com/niklasfasching/go-org/org/paragraph.go

@@ -0,0 +1,46 @@
+package org
+
+import (
+	"regexp"
+	"strings"
+)
+
+type Paragraph struct{ Children []Node }
+type HorizontalRule struct{}
+
+var horizontalRuleRegexp = regexp.MustCompile(`^(\s*)-{5,}\s*$`)
+var plainTextRegexp = regexp.MustCompile(`^(\s*)(.*)`)
+
+func lexText(line string) (token, bool) {
+	if m := plainTextRegexp.FindStringSubmatch(line); m != nil {
+		return token{"text", len(m[1]), m[2], m}, true
+	}
+	return nilToken, false
+}
+
+func lexHorizontalRule(line string) (token, bool) {
+	if m := horizontalRuleRegexp.FindStringSubmatch(line); m != nil {
+		return token{"horizontalRule", len(m[1]), "", m}, true
+	}
+	return nilToken, false
+}
+
+func (d *Document) parseParagraph(i int, parentStop stopFn) (int, Node) {
+	lines, start := []string{d.tokens[i].content}, i
+	i++
+	stop := func(d *Document, i int) bool {
+		return parentStop(d, i) || d.tokens[i].kind != "text" || d.tokens[i].content == ""
+	}
+	for ; !stop(d, i); i++ {
+		lines = append(lines, d.tokens[i].content)
+	}
+	consumed := i - start
+	return consumed, Paragraph{d.parseInline(strings.Join(lines, "\n"))}
+}
+
+func (d *Document) parseHorizontalRule(i int, parentStop stopFn) (int, Node) {
+	return 1, HorizontalRule{}
+}
+
+func (n Paragraph) String() string      { return orgWriter.nodesAsString(n) }
+func (n HorizontalRule) String() string { return orgWriter.nodesAsString(n) }

vendor/github.com/niklasfasching/go-org/org/table.go

@@ -0,0 +1,130 @@
+package org
+
+import (
+	"regexp"
+	"strconv"
+	"strings"
+	"unicode/utf8"
+)
+
+type Table struct {
+	Rows        []Row
+	ColumnInfos []ColumnInfo
+}
+
+type Row struct {
+	Columns   []Column
+	IsSpecial bool
+}
+
+type Column struct {
+	Children []Node
+	*ColumnInfo
+}
+
+type ColumnInfo struct {
+	Align string
+	Len   int
+}
+
+var tableSeparatorRegexp = regexp.MustCompile(`^(\s*)(\|[+-|]*)\s*$`)
+var tableRowRegexp = regexp.MustCompile(`^(\s*)(\|.*)`)
+
+var columnAlignRegexp = regexp.MustCompile(`^<(l|c|r)>$`)
+
+func lexTable(line string) (token, bool) {
+	if m := tableSeparatorRegexp.FindStringSubmatch(line); m != nil {
+		return token{"tableSeparator", len(m[1]), m[2], m}, true
+	} else if m := tableRowRegexp.FindStringSubmatch(line); m != nil {
+		return token{"tableRow", len(m[1]), m[2], m}, true
+	}
+	return nilToken, false
+}
+
+func (d *Document) parseTable(i int, parentStop stopFn) (int, Node) {
+	rawRows, start := [][]string{}, i
+	for ; !parentStop(d, i); i++ {
+		if t := d.tokens[i]; t.kind == "tableRow" {
+			rawRow := strings.FieldsFunc(d.tokens[i].content, func(r rune) bool { return r == '|' })
+			for i := range rawRow {
+				rawRow[i] = strings.TrimSpace(rawRow[i])
+			}
+			rawRows = append(rawRows, rawRow)
+		} else if t.kind == "tableSeparator" {
+			rawRows = append(rawRows, nil)
+		} else {
+			break
+		}
+	}
+
+	table := Table{nil, getColumnInfos(rawRows)}
+	for _, rawColumns := range rawRows {
+		row := Row{nil, isSpecialRow(rawColumns)}
+		if len(rawColumns) != 0 {
+			for i := range table.ColumnInfos {
+				column := Column{nil, &table.ColumnInfos[i]}
+				if i < len(rawColumns) {
+					column.Children = d.parseInline(rawColumns[i])
+				}
+				row.Columns = append(row.Columns, column)
+			}
+		}
+		table.Rows = append(table.Rows, row)
+	}
+	return i - start, table
+}
+
+func getColumnInfos(rows [][]string) []ColumnInfo {
+	columnCount := 0
+	for _, columns := range rows {
+		if n := len(columns); n > columnCount {
+			columnCount = n
+		}
+	}
+
+	columnInfos := make([]ColumnInfo, columnCount)
+	for i := 0; i < columnCount; i++ {
+		countNumeric, countNonNumeric := 0, 0
+		for _, columns := range rows {
+			if i >= len(columns) {
+				continue
+			}
+
+			if n := utf8.RuneCountInString(columns[i]); n > columnInfos[i].Len {
+				columnInfos[i].Len = n
+			}
+
+			if m := columnAlignRegexp.FindStringSubmatch(columns[i]); m != nil && isSpecialRow(columns) {
+				switch m[1] {
+				case "l":
+					columnInfos[i].Align = "left"
+				case "c":
+					columnInfos[i].Align = "center"
+				case "r":
+					columnInfos[i].Align = "right"
+				}
+			} else if _, err := strconv.ParseFloat(columns[i], 32); err == nil {
+				countNumeric++
+			} else if strings.TrimSpace(columns[i]) != "" {
+				countNonNumeric++
+			}
+		}
+
+		if columnInfos[i].Align == "" && countNumeric >= countNonNumeric {
+			columnInfos[i].Align = "right"
+		}
+	}
+	return columnInfos
+}
+
+func isSpecialRow(rawColumns []string) bool {
+	isAlignRow := true
+	for _, rawColumn := range rawColumns {
+		if !columnAlignRegexp.MatchString(rawColumn) && rawColumn != "" {
+			isAlignRow = false
+		}
+	}
+	return isAlignRow
+}
+
+func (n Table) String() string { return orgWriter.nodesAsString(n) }

vendor/github.com/niklasfasching/go-org/org/util.go

@@ -0,0 +1,19 @@
+package org
+
+func isSecondBlankLine(d *Document, i int) bool {
+	if i-1 <= 0 {
+		return false
+	}
+	t1, t2 := d.tokens[i-1], d.tokens[i]
+	if t1.kind == "text" && t2.kind == "text" && t1.content == "" && t2.content == "" {
+		return true
+	}
+	return false
+}
+
+func isImageOrVideoLink(n Node) bool {
+	if l, ok := n.(RegularLink); ok && l.Kind() == "video" || l.Kind() == "image" {
+		return true
+	}
+	return false
+}

vendor/github.com/niklasfasching/go-org/org/writer.go

@@ -0,0 +1,103 @@
+package org
+
+import "fmt"
+
+// Writer is the interface that is used to export a parsed document into a new format. See Document.Write().
+type Writer interface {
+	Before(*Document) // Before is called before any nodes are passed to the writer.
+	After(*Document)  // After is called after all nodes have been passed to the writer.
+	String() string   // String is called at the very end to retrieve the final output.
+
+	WriterWithExtensions() Writer
+
+	WriteKeyword(Keyword)
+	WriteInclude(Include)
+	WriteComment(Comment)
+	WriteNodeWithMeta(NodeWithMeta)
+	WriteNodeWithName(NodeWithName)
+	WriteHeadline(Headline)
+	WriteBlock(Block)
+	WriteExample(Example)
+	WriteDrawer(Drawer)
+	WritePropertyDrawer(PropertyDrawer)
+	WriteList(List)
+	WriteListItem(ListItem)
+	WriteDescriptiveListItem(DescriptiveListItem)
+	WriteTable(Table)
+	WriteHorizontalRule(HorizontalRule)
+	WriteParagraph(Paragraph)
+	WriteText(Text)
+	WriteEmphasis(Emphasis)
+	WriteLatexFragment(LatexFragment)
+	WriteStatisticToken(StatisticToken)
+	WriteExplicitLineBreak(ExplicitLineBreak)
+	WriteLineBreak(LineBreak)
+	WriteRegularLink(RegularLink)
+	WriteTimestamp(Timestamp)
+	WriteFootnoteLink(FootnoteLink)
+	WriteFootnoteDefinition(FootnoteDefinition)
+}
+
+func WriteNodes(w Writer, nodes ...Node) {
+	w = w.WriterWithExtensions()
+	for _, n := range nodes {
+		switch n := n.(type) {
+		case Keyword:
+			w.WriteKeyword(n)
+		case Include:
+			w.WriteInclude(n)
+		case Comment:
+			w.WriteComment(n)
+		case NodeWithMeta:
+			w.WriteNodeWithMeta(n)
+		case NodeWithName:
+			w.WriteNodeWithName(n)
+		case Headline:
+			w.WriteHeadline(n)
+		case Block:
+			w.WriteBlock(n)
+		case Example:
+			w.WriteExample(n)
+		case Drawer:
+			w.WriteDrawer(n)
+		case PropertyDrawer:
+			w.WritePropertyDrawer(n)
+		case List:
+			w.WriteList(n)
+		case ListItem:
+			w.WriteListItem(n)
+		case DescriptiveListItem:
+			w.WriteDescriptiveListItem(n)
+		case Table:
+			w.WriteTable(n)
+		case HorizontalRule:
+			w.WriteHorizontalRule(n)
+		case Paragraph:
+			w.WriteParagraph(n)
+		case Text:
+			w.WriteText(n)
+		case Emphasis:
+			w.WriteEmphasis(n)
+		case LatexFragment:
+			w.WriteLatexFragment(n)
+		case StatisticToken:
+			w.WriteStatisticToken(n)
+		case ExplicitLineBreak:
+			w.WriteExplicitLineBreak(n)
+		case LineBreak:
+			w.WriteLineBreak(n)
+		case RegularLink:
+			w.WriteRegularLink(n)
+		case Timestamp:
+			w.WriteTimestamp(n)
+		case FootnoteLink:
+			w.WriteFootnoteLink(n)
+		case FootnoteDefinition:
+			w.WriteFootnoteDefinition(n)
+		default:
+			if n != nil {
+				panic(fmt.Sprintf("bad node %T %#v", n, n))
+			}
+		}
+	}
+}

vendor/github.com/russross/blackfriday/doc.go

@@ -1,32 +0,0 @@
-// Package blackfriday is a Markdown processor.
-//
-// It translates plain text with simple formatting rules into HTML or LaTeX.
-//
-// Sanitized Anchor Names
-//
-// Blackfriday includes an algorithm for creating sanitized anchor names
-// corresponding to a given input text. This algorithm is used to create
-// anchors for headings when EXTENSION_AUTO_HEADER_IDS is enabled. The
-// algorithm is specified below, so that other packages can create
-// compatible anchor names and links to those anchors.
-//
-// The algorithm iterates over the input text, interpreted as UTF-8,
-// one Unicode code point (rune) at a time. All runes that are letters (category L)
-// or numbers (category N) are considered valid characters. They are mapped to
-// lower case, and included in the output. All other runes are considered
-// invalid characters. Invalid characters that preceed the first valid character,
-// as well as invalid character that follow the last valid character
-// are dropped completely. All other sequences of invalid characters
-// between two valid characters are replaced with a single dash character '-'.
-//
-// SanitizedAnchorName exposes this functionality, and can be used to
-// create compatible links to the anchor names generated by blackfriday.
-// This algorithm is also implemented in a small standalone package at
-// github.com/shurcooL/sanitized_anchor_name. It can be useful for clients
-// that want a small package and don't need full functionality of blackfriday.
-package blackfriday
-
-// NOTE: Keep Sanitized Anchor Name algorithm in sync with package
-//       github.com/shurcooL/sanitized_anchor_name.
-//       Otherwise, users of sanitized_anchor_name will get anchor names
-//       that are incompatible with those generated by blackfriday.

vendor/github.com/russross/blackfriday/html.go

@@ -1,938 +0,0 @@
-//
-// Blackfriday Markdown Processor
-// Available at http://github.com/russross/blackfriday
-//
-// Copyright © 2011 Russ Ross <russ@russross.com>.
-// Distributed under the Simplified BSD License.
-// See README.md for details.
-//
-
-//
-//
-// HTML rendering backend
-//
-//
-
-package blackfriday
-
-import (
-	"bytes"
-	"fmt"
-	"regexp"
-	"strconv"
-	"strings"
-)
-
-// Html renderer configuration options.
-const (
-	HTML_SKIP_HTML                 = 1 << iota // skip preformatted HTML blocks
-	HTML_SKIP_STYLE                            // skip embedded <style> elements
-	HTML_SKIP_IMAGES                           // skip embedded images
-	HTML_SKIP_LINKS                            // skip all links
-	HTML_SAFELINK                              // only link to trusted protocols
-	HTML_NOFOLLOW_LINKS                        // only link with rel="nofollow"
-	HTML_NOREFERRER_LINKS                      // only link with rel="noreferrer"
-	HTML_HREF_TARGET_BLANK                     // add a blank target
-	HTML_TOC                                   // generate a table of contents
-	HTML_OMIT_CONTENTS                         // skip the main contents (for a standalone table of contents)
-	HTML_COMPLETE_PAGE                         // generate a complete HTML page
-	HTML_USE_XHTML                             // generate XHTML output instead of HTML
-	HTML_USE_SMARTYPANTS                       // enable smart punctuation substitutions
-	HTML_SMARTYPANTS_FRACTIONS                 // enable smart fractions (with HTML_USE_SMARTYPANTS)
-	HTML_SMARTYPANTS_DASHES                    // enable smart dashes (with HTML_USE_SMARTYPANTS)
-	HTML_SMARTYPANTS_LATEX_DASHES              // enable LaTeX-style dashes (with HTML_USE_SMARTYPANTS and HTML_SMARTYPANTS_DASHES)
-	HTML_SMARTYPANTS_ANGLED_QUOTES             // enable angled double quotes (with HTML_USE_SMARTYPANTS) for double quotes rendering
-	HTML_SMARTYPANTS_QUOTES_NBSP               // enable "French guillemets" (with HTML_USE_SMARTYPANTS)
-	HTML_FOOTNOTE_RETURN_LINKS                 // generate a link at the end of a footnote to return to the source
-)
-
-var (
-	alignments = []string{
-		"left",
-		"right",
-		"center",
-	}
-
-	// TODO: improve this regexp to catch all possible entities:
-	htmlEntity = regexp.MustCompile(`&[a-z]{2,5};`)
-)
-
-type HtmlRendererParameters struct {
-	// Prepend this text to each relative URL.
-	AbsolutePrefix string
-	// Add this text to each footnote anchor, to ensure uniqueness.
-	FootnoteAnchorPrefix string
-	// Show this text inside the <a> tag for a footnote return link, if the
-	// HTML_FOOTNOTE_RETURN_LINKS flag is enabled. If blank, the string
-	// <sup>[return]</sup> is used.
-	FootnoteReturnLinkContents string
-	// If set, add this text to the front of each Header ID, to ensure
-	// uniqueness.
-	HeaderIDPrefix string
-	// If set, add this text to the back of each Header ID, to ensure uniqueness.
-	HeaderIDSuffix string
-}
-
-// Html is a type that implements the Renderer interface for HTML output.
-//
-// Do not create this directly, instead use the HtmlRenderer function.
-type Html struct {
-	flags    int    // HTML_* options
-	closeTag string // how to end singleton tags: either " />" or ">"
-	title    string // document title
-	css      string // optional css file url (used with HTML_COMPLETE_PAGE)
-
-	parameters HtmlRendererParameters
-
-	// table of contents data
-	tocMarker    int
-	headerCount  int
-	currentLevel int
-	toc          *bytes.Buffer
-
-	// Track header IDs to prevent ID collision in a single generation.
-	headerIDs map[string]int
-
-	smartypants *smartypantsRenderer
-}
-
-const (
-	xhtmlClose = " />"
-	htmlClose  = ">"
-)
-
-// HtmlRenderer creates and configures an Html object, which
-// satisfies the Renderer interface.
-//
-// flags is a set of HTML_* options ORed together.
-// title is the title of the document, and css is a URL for the document's
-// stylesheet.
-// title and css are only used when HTML_COMPLETE_PAGE is selected.
-func HtmlRenderer(flags int, title string, css string) Renderer {
-	return HtmlRendererWithParameters(flags, title, css, HtmlRendererParameters{})
-}
-
-func HtmlRendererWithParameters(flags int, title string,
-	css string, renderParameters HtmlRendererParameters) Renderer {
-	// configure the rendering engine
-	closeTag := htmlClose
-	if flags&HTML_USE_XHTML != 0 {
-		closeTag = xhtmlClose
-	}
-
-	if renderParameters.FootnoteReturnLinkContents == "" {
-		renderParameters.FootnoteReturnLinkContents = `<sup>[return]</sup>`
-	}
-
-	return &Html{
-		flags:      flags,
-		closeTag:   closeTag,
-		title:      title,
-		css:        css,
-		parameters: renderParameters,
-
-		headerCount:  0,
-		currentLevel: 0,
-		toc:          new(bytes.Buffer),
-
-		headerIDs: make(map[string]int),
-
-		smartypants: smartypants(flags),
-	}
-}
-
-// Using if statements is a bit faster than a switch statement. As the compiler
-// improves, this should be unnecessary this is only worthwhile because
-// attrEscape is the single largest CPU user in normal use.
-// Also tried using map, but that gave a ~3x slowdown.
-func escapeSingleChar(char byte) (string, bool) {
-	if char == '"' {
-		return "&quot;", true
-	}
-	if char == '&' {
-		return "&amp;", true
-	}
-	if char == '<' {
-		return "&lt;", true
-	}
-	if char == '>' {
-		return "&gt;", true
-	}
-	return "", false
-}
-
-func attrEscape(out *bytes.Buffer, src []byte) {
-	org := 0
-	for i, ch := range src {
-		if entity, ok := escapeSingleChar(ch); ok {
-			if i > org {
-				// copy all the normal characters since the last escape
-				out.Write(src[org:i])
-			}
-			org = i + 1
-			out.WriteString(entity)
-		}
-	}
-	if org < len(src) {
-		out.Write(src[org:])
-	}
-}
-
-func entityEscapeWithSkip(out *bytes.Buffer, src []byte, skipRanges [][]int) {
-	end := 0
-	for _, rang := range skipRanges {
-		attrEscape(out, src[end:rang[0]])
-		out.Write(src[rang[0]:rang[1]])
-		end = rang[1]
-	}
-	attrEscape(out, src[end:])
-}
-
-func (options *Html) GetFlags() int {
-	return options.flags
-}
-
-func (options *Html) TitleBlock(out *bytes.Buffer, text []byte) {
-	text = bytes.TrimPrefix(text, []byte("% "))
-	text = bytes.Replace(text, []byte("\n% "), []byte("\n"), -1)
-	out.WriteString("<h1 class=\"title\">")
-	out.Write(text)
-	out.WriteString("\n</h1>")
-}
-
-func (options *Html) Header(out *bytes.Buffer, text func() bool, level int, id string) {
-	marker := out.Len()
-	doubleSpace(out)
-
-	if id == "" && options.flags&HTML_TOC != 0 {
-		id = fmt.Sprintf("toc_%d", options.headerCount)
-	}
-
-	if id != "" {
-		id = options.ensureUniqueHeaderID(id)
-
-		if options.parameters.HeaderIDPrefix != "" {
-			id = options.parameters.HeaderIDPrefix + id
-		}
-
-		if options.parameters.HeaderIDSuffix != "" {
-			id = id + options.parameters.HeaderIDSuffix
-		}
-
-		out.WriteString(fmt.Sprintf("<h%d id=\"%s\">", level, id))
-	} else {
-		out.WriteString(fmt.Sprintf("<h%d>", level))
-	}
-
-	tocMarker := out.Len()
-	if !text() {
-		out.Truncate(marker)
-		return
-	}
-
-	// are we building a table of contents?
-	if options.flags&HTML_TOC != 0 {
-		options.TocHeaderWithAnchor(out.Bytes()[tocMarker:], level, id)
-	}
-
-	out.WriteString(fmt.Sprintf("</h%d>\n", level))
-}
-
-func (options *Html) BlockHtml(out *bytes.Buffer, text []byte) {
-	if options.flags&HTML_SKIP_HTML != 0 {
-		return
-	}
-
-	doubleSpace(out)
-	out.Write(text)
-	out.WriteByte('\n')
-}
-
-func (options *Html) HRule(out *bytes.Buffer) {
-	doubleSpace(out)
-	out.WriteString("<hr")
-	out.WriteString(options.closeTag)
-	out.WriteByte('\n')
-}
-
-func (options *Html) BlockCode(out *bytes.Buffer, text []byte, info string) {
-	doubleSpace(out)
-
-	endOfLang := strings.IndexAny(info, "\t ")
-	if endOfLang < 0 {
-		endOfLang = len(info)
-	}
-	lang := info[:endOfLang]
-	if len(lang) == 0 || lang == "." {
-		out.WriteString("<pre><code>")
-	} else {
-		out.WriteString("<pre><code class=\"language-")
-		attrEscape(out, []byte(lang))
-		out.WriteString("\">")
-	}
-	attrEscape(out, text)
-	out.WriteString("</code></pre>\n")
-}
-
-func (options *Html) BlockQuote(out *bytes.Buffer, text []byte) {
-	doubleSpace(out)
-	out.WriteString("<blockquote>\n")
-	out.Write(text)
-	out.WriteString("</blockquote>\n")
-}
-
-func (options *Html) Table(out *bytes.Buffer, header []byte, body []byte, columnData []int) {
-	doubleSpace(out)
-	out.WriteString("<table>\n<thead>\n")
-	out.Write(header)
-	out.WriteString("</thead>\n\n<tbody>\n")
-	out.Write(body)
-	out.WriteString("</tbody>\n</table>\n")
-}
-
-func (options *Html) TableRow(out *bytes.Buffer, text []byte) {
-	doubleSpace(out)
-	out.WriteString("<tr>\n")
-	out.Write(text)
-	out.WriteString("\n</tr>\n")
-}
-
-func (options *Html) TableHeaderCell(out *bytes.Buffer, text []byte, align int) {
-	doubleSpace(out)
-	switch align {
-	case TABLE_ALIGNMENT_LEFT:
-		out.WriteString("<th align=\"left\">")
-	case TABLE_ALIGNMENT_RIGHT:
-		out.WriteString("<th align=\"right\">")
-	case TABLE_ALIGNMENT_CENTER:
-		out.WriteString("<th align=\"center\">")
-	default:
-		out.WriteString("<th>")
-	}
-
-	out.Write(text)
-	out.WriteString("</th>")
-}
-
-func (options *Html) TableCell(out *bytes.Buffer, text []byte, align int) {
-	doubleSpace(out)
-	switch align {
-	case TABLE_ALIGNMENT_LEFT:
-		out.WriteString("<td align=\"left\">")
-	case TABLE_ALIGNMENT_RIGHT:
-		out.WriteString("<td align=\"right\">")
-	case TABLE_ALIGNMENT_CENTER:
-		out.WriteString("<td align=\"center\">")
-	default:
-		out.WriteString("<td>")
-	}
-
-	out.Write(text)
-	out.WriteString("</td>")
-}
-
-func (options *Html) Footnotes(out *bytes.Buffer, text func() bool) {
-	out.WriteString("<div class=\"footnotes\">\n")
-	options.HRule(out)
-	options.List(out, text, LIST_TYPE_ORDERED)
-	out.WriteString("</div>\n")
-}
-
-func (options *Html) FootnoteItem(out *bytes.Buffer, name, text []byte, flags int) {
-	if flags&LIST_ITEM_CONTAINS_BLOCK != 0 || flags&LIST_ITEM_BEGINNING_OF_LIST != 0 {
-		doubleSpace(out)
-	}
-	slug := slugify(name)
-	out.WriteString(`<li id="`)
-	out.WriteString(`fn:`)
-	out.WriteString(options.parameters.FootnoteAnchorPrefix)
-	out.Write(slug)
-	out.WriteString(`">`)
-	out.Write(text)
-	if options.flags&HTML_FOOTNOTE_RETURN_LINKS != 0 {
-		out.WriteString(` <a class="footnote-return" href="#`)
-		out.WriteString(`fnref:`)
-		out.WriteString(options.parameters.FootnoteAnchorPrefix)
-		out.Write(slug)
-		out.WriteString(`">`)
-		out.WriteString(options.parameters.FootnoteReturnLinkContents)
-		out.WriteString(`</a>`)
-	}
-	out.WriteString("</li>\n")
-}
-
-func (options *Html) List(out *bytes.Buffer, text func() bool, flags int) {
-	marker := out.Len()
-	doubleSpace(out)
-
-	if flags&LIST_TYPE_DEFINITION != 0 {
-		out.WriteString("<dl>")
-	} else if flags&LIST_TYPE_ORDERED != 0 {
-		out.WriteString("<ol>")
-	} else {
-		out.WriteString("<ul>")
-	}
-	if !text() {
-		out.Truncate(marker)
-		return
-	}
-	if flags&LIST_TYPE_DEFINITION != 0 {
-		out.WriteString("</dl>\n")
-	} else if flags&LIST_TYPE_ORDERED != 0 {
-		out.WriteString("</ol>\n")
-	} else {
-		out.WriteString("</ul>\n")
-	}
-}
-
-func (options *Html) ListItem(out *bytes.Buffer, text []byte, flags int) {
-	if (flags&LIST_ITEM_CONTAINS_BLOCK != 0 && flags&LIST_TYPE_DEFINITION == 0) ||
-		flags&LIST_ITEM_BEGINNING_OF_LIST != 0 {
-		doubleSpace(out)
-	}
-	if flags&LIST_TYPE_TERM != 0 {
-		out.WriteString("<dt>")
-	} else if flags&LIST_TYPE_DEFINITION != 0 {
-		out.WriteString("<dd>")
-	} else {
-		out.WriteString("<li>")
-	}
-	out.Write(text)
-	if flags&LIST_TYPE_TERM != 0 {
-		out.WriteString("</dt>\n")
-	} else if flags&LIST_TYPE_DEFINITION != 0 {
-		out.WriteString("</dd>\n")
-	} else {
-		out.WriteString("</li>\n")
-	}
-}
-
-func (options *Html) Paragraph(out *bytes.Buffer, text func() bool) {
-	marker := out.Len()
-	doubleSpace(out)
-
-	out.WriteString("<p>")
-	if !text() {
-		out.Truncate(marker)
-		return
-	}
-	out.WriteString("</p>\n")
-}
-
-func (options *Html) AutoLink(out *bytes.Buffer, link []byte, kind int) {
-	skipRanges := htmlEntity.FindAllIndex(link, -1)
-	if options.flags&HTML_SAFELINK != 0 && !isSafeLink(link) && kind != LINK_TYPE_EMAIL {
-		// mark it but don't link it if it is not a safe link: no smartypants
-		out.WriteString("<tt>")
-		entityEscapeWithSkip(out, link, skipRanges)
-		out.WriteString("</tt>")
-		return
-	}
-
-	out.WriteString("<a href=\"")
-	if kind == LINK_TYPE_EMAIL {
-		out.WriteString("mailto:")
-	} else {
-		options.maybeWriteAbsolutePrefix(out, link)
-	}
-
-	entityEscapeWithSkip(out, link, skipRanges)
-
-	var relAttrs []string
-	if options.flags&HTML_NOFOLLOW_LINKS != 0 && !isRelativeLink(link) {
-		relAttrs = append(relAttrs, "nofollow")
-	}
-	if options.flags&HTML_NOREFERRER_LINKS != 0 && !isRelativeLink(link) {
-		relAttrs = append(relAttrs, "noreferrer")
-	}
-	if len(relAttrs) > 0 {
-		out.WriteString(fmt.Sprintf("\" rel=\"%s", strings.Join(relAttrs, " ")))
-	}
-
-	// blank target only add to external link
-	if options.flags&HTML_HREF_TARGET_BLANK != 0 && !isRelativeLink(link) {
-		out.WriteString("\" target=\"_blank")
-	}
-
-	out.WriteString("\">")
-
-	// Pretty print: if we get an email address as
-	// an actual URI, e.g. `mailto:foo@bar.com`, we don't
-	// want to print the `mailto:` prefix
-	switch {
-	case bytes.HasPrefix(link, []byte("mailto://")):
-		attrEscape(out, link[len("mailto://"):])
-	case bytes.HasPrefix(link, []byte("mailto:")):
-		attrEscape(out, link[len("mailto:"):])
-	default:
-		entityEscapeWithSkip(out, link, skipRanges)
-	}
-
-	out.WriteString("</a>")
-}
-
-func (options *Html) CodeSpan(out *bytes.Buffer, text []byte) {
-	out.WriteString("<code>")
-	attrEscape(out, text)
-	out.WriteString("</code>")
-}
-
-func (options *Html) DoubleEmphasis(out *bytes.Buffer, text []byte) {
-	out.WriteString("<strong>")
-	out.Write(text)
-	out.WriteString("</strong>")
-}
-
-func (options *Html) Emphasis(out *bytes.Buffer, text []byte) {
-	if len(text) == 0 {
-		return
-	}
-	out.WriteString("<em>")
-	out.Write(text)
-	out.WriteString("</em>")
-}
-
-func (options *Html) maybeWriteAbsolutePrefix(out *bytes.Buffer, link []byte) {
-	if options.parameters.AbsolutePrefix != "" && isRelativeLink(link) && link[0] != '.' {
-		out.WriteString(options.parameters.AbsolutePrefix)
-		if link[0] != '/' {
-			out.WriteByte('/')
-		}
-	}
-}
-
-func (options *Html) Image(out *bytes.Buffer, link []byte, title []byte, alt []byte) {
-	if options.flags&HTML_SKIP_IMAGES != 0 {
-		return
-	}
-
-	out.WriteString("<img src=\"")
-	options.maybeWriteAbsolutePrefix(out, link)
-	attrEscape(out, link)
-	out.WriteString("\" alt=\"")
-	if len(alt) > 0 {
-		attrEscape(out, alt)
-	}
-	if len(title) > 0 {
-		out.WriteString("\" title=\"")
-		attrEscape(out, title)
-	}
-
-	out.WriteByte('"')
-	out.WriteString(options.closeTag)
-}
-
-func (options *Html) LineBreak(out *bytes.Buffer) {
-	out.WriteString("<br")
-	out.WriteString(options.closeTag)
-	out.WriteByte('\n')
-}
-
-func (options *Html) Link(out *bytes.Buffer, link []byte, title []byte, content []byte) {
-	if options.flags&HTML_SKIP_LINKS != 0 {
-		// write the link text out but don't link it, just mark it with typewriter font
-		out.WriteString("<tt>")
-		attrEscape(out, content)
-		out.WriteString("</tt>")
-		return
-	}
-
-	if options.flags&HTML_SAFELINK != 0 && !isSafeLink(link) {
-		// write the link text out but don't link it, just mark it with typewriter font
-		out.WriteString("<tt>")
-		attrEscape(out, content)
-		out.WriteString("</tt>")
-		return
-	}
-
-	out.WriteString("<a href=\"")
-	options.maybeWriteAbsolutePrefix(out, link)
-	attrEscape(out, link)
-	if len(title) > 0 {
-		out.WriteString("\" title=\"")
-		attrEscape(out, title)
-	}
-	var relAttrs []string
-	if options.flags&HTML_NOFOLLOW_LINKS != 0 && !isRelativeLink(link) {
-		relAttrs = append(relAttrs, "nofollow")
-	}
-	if options.flags&HTML_NOREFERRER_LINKS != 0 && !isRelativeLink(link) {
-		relAttrs = append(relAttrs, "noreferrer")
-	}
-	if len(relAttrs) > 0 {
-		out.WriteString(fmt.Sprintf("\" rel=\"%s", strings.Join(relAttrs, " ")))
-	}
-
-	// blank target only add to external link
-	if options.flags&HTML_HREF_TARGET_BLANK != 0 && !isRelativeLink(link) {
-		out.WriteString("\" target=\"_blank")
-	}
-
-	out.WriteString("\">")
-	out.Write(content)
-	out.WriteString("</a>")
-	return
-}
-
-func (options *Html) RawHtmlTag(out *bytes.Buffer, text []byte) {
-	if options.flags&HTML_SKIP_HTML != 0 {
-		return
-	}
-	if options.flags&HTML_SKIP_STYLE != 0 && isHtmlTag(text, "style") {
-		return
-	}
-	if options.flags&HTML_SKIP_LINKS != 0 && isHtmlTag(text, "a") {
-		return
-	}
-	if options.flags&HTML_SKIP_IMAGES != 0 && isHtmlTag(text, "img") {
-		return
-	}
-	out.Write(text)
-}
-
-func (options *Html) TripleEmphasis(out *bytes.Buffer, text []byte) {
-	out.WriteString("<strong><em>")
-	out.Write(text)
-	out.WriteString("</em></strong>")
-}
-
-func (options *Html) StrikeThrough(out *bytes.Buffer, text []byte) {
-	out.WriteString("<del>")
-	out.Write(text)
-	out.WriteString("</del>")
-}
-
-func (options *Html) FootnoteRef(out *bytes.Buffer, ref []byte, id int) {
-	slug := slugify(ref)
-	out.WriteString(`<sup class="footnote-ref" id="`)
-	out.WriteString(`fnref:`)
-	out.WriteString(options.parameters.FootnoteAnchorPrefix)
-	out.Write(slug)
-	out.WriteString(`"><a href="#`)
-	out.WriteString(`fn:`)
-	out.WriteString(options.parameters.FootnoteAnchorPrefix)
-	out.Write(slug)
-	out.WriteString(`">`)
-	out.WriteString(strconv.Itoa(id))
-	out.WriteString(`</a></sup>`)
-}
-
-func (options *Html) Entity(out *bytes.Buffer, entity []byte) {
-	out.Write(entity)
-}
-
-func (options *Html) NormalText(out *bytes.Buffer, text []byte) {
-	if options.flags&HTML_USE_SMARTYPANTS != 0 {
-		options.Smartypants(out, text)
-	} else {
-		attrEscape(out, text)
-	}
-}
-
-func (options *Html) Smartypants(out *bytes.Buffer, text []byte) {
-	smrt := smartypantsData{false, false}
-
-	// first do normal entity escaping
-	var escaped bytes.Buffer
-	attrEscape(&escaped, text)
-	text = escaped.Bytes()
-
-	mark := 0
-	for i := 0; i < len(text); i++ {
-		if action := options.smartypants[text[i]]; action != nil {
-			if i > mark {
-				out.Write(text[mark:i])
-			}
-
-			previousChar := byte(0)
-			if i > 0 {
-				previousChar = text[i-1]
-			}
-			i += action(out, &smrt, previousChar, text[i:])
-			mark = i + 1
-		}
-	}
-
-	if mark < len(text) {
-		out.Write(text[mark:])
-	}
-}
-
-func (options *Html) DocumentHeader(out *bytes.Buffer) {
-	if options.flags&HTML_COMPLETE_PAGE == 0 {
-		return
-	}
-
-	ending := ""
-	if options.flags&HTML_USE_XHTML != 0 {
-		out.WriteString("<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" ")
-		out.WriteString("\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n")
-		out.WriteString("<html xmlns=\"http://www.w3.org/1999/xhtml\">\n")
-		ending = " /"
-	} else {
-		out.WriteString("<!DOCTYPE html>\n")
-		out.WriteString("<html>\n")
-	}
-	out.WriteString("<head>\n")
-	out.WriteString("  <title>")
-	options.NormalText(out, []byte(options.title))
-	out.WriteString("</title>\n")
-	out.WriteString("  <meta name=\"GENERATOR\" content=\"Blackfriday Markdown Processor v")
-	out.WriteString(VERSION)
-	out.WriteString("\"")
-	out.WriteString(ending)
-	out.WriteString(">\n")
-	out.WriteString("  <meta charset=\"utf-8\"")
-	out.WriteString(ending)
-	out.WriteString(">\n")
-	if options.css != "" {
-		out.WriteString("  <link rel=\"stylesheet\" type=\"text/css\" href=\"")
-		attrEscape(out, []byte(options.css))
-		out.WriteString("\"")
-		out.WriteString(ending)
-		out.WriteString(">\n")
-	}
-	out.WriteString("</head>\n")
-	out.WriteString("<body>\n")
-
-	options.tocMarker = out.Len()
-}
-
-func (options *Html) DocumentFooter(out *bytes.Buffer) {
-	// finalize and insert the table of contents
-	if options.flags&HTML_TOC != 0 {
-		options.TocFinalize()
-
-		// now we have to insert the table of contents into the document
-		var temp bytes.Buffer
-
-		// start by making a copy of everything after the document header
-		temp.Write(out.Bytes()[options.tocMarker:])
-
-		// now clear the copied material from the main output buffer
-		out.Truncate(options.tocMarker)
-
-		// corner case spacing issue
-		if options.flags&HTML_COMPLETE_PAGE != 0 {
-			out.WriteByte('\n')
-		}
-
-		// insert the table of contents
-		out.WriteString("<nav>\n")
-		out.Write(options.toc.Bytes())
-		out.WriteString("</nav>\n")
-
-		// corner case spacing issue
-		if options.flags&HTML_COMPLETE_PAGE == 0 && options.flags&HTML_OMIT_CONTENTS == 0 {
-			out.WriteByte('\n')
-		}
-
-		// write out everything that came after it
-		if options.flags&HTML_OMIT_CONTENTS == 0 {
-			out.Write(temp.Bytes())
-		}
-	}
-
-	if options.flags&HTML_COMPLETE_PAGE != 0 {
-		out.WriteString("\n</body>\n")
-		out.WriteString("</html>\n")
-	}
-
-}
-
-func (options *Html) TocHeaderWithAnchor(text []byte, level int, anchor string) {
-	for level > options.currentLevel {
-		switch {
-		case bytes.HasSuffix(options.toc.Bytes(), []byte("</li>\n")):
-			// this sublist can nest underneath a header
-			size := options.toc.Len()
-			options.toc.Truncate(size - len("</li>\n"))
-
-		case options.currentLevel > 0:
-			options.toc.WriteString("<li>")
-		}
-		if options.toc.Len() > 0 {
-			options.toc.WriteByte('\n')
-		}
-		options.toc.WriteString("<ul>\n")
-		options.currentLevel++
-	}
-
-	for level < options.currentLevel {
-		options.toc.WriteString("</ul>")
-		if options.currentLevel > 1 {
-			options.toc.WriteString("</li>\n")
-		}
-		options.currentLevel--
-	}
-
-	options.toc.WriteString("<li><a href=\"#")
-	if anchor != "" {
-		options.toc.WriteString(anchor)
-	} else {
-		options.toc.WriteString("toc_")
-		options.toc.WriteString(strconv.Itoa(options.headerCount))
-	}
-	options.toc.WriteString("\">")
-	options.headerCount++
-
-	options.toc.Write(text)
-
-	options.toc.WriteString("</a></li>\n")
-}
-
-func (options *Html) TocHeader(text []byte, level int) {
-	options.TocHeaderWithAnchor(text, level, "")
-}
-
-func (options *Html) TocFinalize() {
-	for options.currentLevel > 1 {
-		options.toc.WriteString("</ul></li>\n")
-		options.currentLevel--
-	}
-
-	if options.currentLevel > 0 {
-		options.toc.WriteString("</ul>\n")
-	}
-}
-
-func isHtmlTag(tag []byte, tagname string) bool {
-	found, _ := findHtmlTagPos(tag, tagname)
-	return found
-}
-
-// Look for a character, but ignore it when it's in any kind of quotes, it
-// might be JavaScript
-func skipUntilCharIgnoreQuotes(html []byte, start int, char byte) int {
-	inSingleQuote := false
-	inDoubleQuote := false
-	inGraveQuote := false
-	i := start
-	for i < len(html) {
-		switch {
-		case html[i] == char && !inSingleQuote && !inDoubleQuote && !inGraveQuote:
-			return i
-		case html[i] == '\'':
-			inSingleQuote = !inSingleQuote
-		case html[i] == '"':
-			inDoubleQuote = !inDoubleQuote
-		case html[i] == '`':
-			inGraveQuote = !inGraveQuote
-		}
-		i++
-	}
-	return start
-}
-
-func findHtmlTagPos(tag []byte, tagname string) (bool, int) {
-	i := 0
-	if i < len(tag) && tag[0] != '<' {
-		return false, -1
-	}
-	i++
-	i = skipSpace(tag, i)
-
-	if i < len(tag) && tag[i] == '/' {
-		i++
-	}
-
-	i = skipSpace(tag, i)
-	j := 0
-	for ; i < len(tag); i, j = i+1, j+1 {
-		if j >= len(tagname) {
-			break
-		}
-
-		if strings.ToLower(string(tag[i]))[0] != tagname[j] {
-			return false, -1
-		}
-	}
-
-	if i == len(tag) {
-		return false, -1
-	}
-
-	rightAngle := skipUntilCharIgnoreQuotes(tag, i, '>')
-	if rightAngle > i {
-		return true, rightAngle
-	}
-
-	return false, -1
-}
-
-func skipUntilChar(text []byte, start int, char byte) int {
-	i := start
-	for i < len(text) && text[i] != char {
-		i++
-	}
-	return i
-}
-
-func skipSpace(tag []byte, i int) int {
-	for i < len(tag) && isspace(tag[i]) {
-		i++
-	}
-	return i
-}
-
-func skipChar(data []byte, start int, char byte) int {
-	i := start
-	for i < len(data) && data[i] == char {
-		i++
-	}
-	return i
-}
-
-func doubleSpace(out *bytes.Buffer) {
-	if out.Len() > 0 {
-		out.WriteByte('\n')
-	}
-}
-
-func isRelativeLink(link []byte) (yes bool) {
-	// a tag begin with '#'
-	if link[0] == '#' {
-		return true
-	}
-
-	// link begin with '/' but not '//', the second maybe a protocol relative link
-	if len(link) >= 2 && link[0] == '/' && link[1] != '/' {
-		return true
-	}
-
-	// only the root '/'
-	if len(link) == 1 && link[0] == '/' {
-		return true
-	}
-
-	// current directory : begin with "./"
-	if bytes.HasPrefix(link, []byte("./")) {
-		return true
-	}
-
-	// parent directory : begin with "../"
-	if bytes.HasPrefix(link, []byte("../")) {
-		return true
-	}
-
-	return false
-}
-
-func (options *Html) ensureUniqueHeaderID(id string) string {
-	for count, found := options.headerIDs[id]; found; count, found = options.headerIDs[id] {
-		tmp := fmt.Sprintf("%s-%d", id, count+1)
-
-		if _, tmpFound := options.headerIDs[tmp]; !tmpFound {
-			options.headerIDs[id] = count + 1
-			id = tmp
-		} else {
-			id = id + "-1"
-		}
-	}
-
-	if _, found := options.headerIDs[id]; !found {
-		options.headerIDs[id] = 0
-	}
-
-	return id
-}

vendor/github.com/russross/blackfriday/latex.go

@@ -1,334 +0,0 @@
-//
-// Blackfriday Markdown Processor
-// Available at http://github.com/russross/blackfriday
-//
-// Copyright © 2011 Russ Ross <russ@russross.com>.
-// Distributed under the Simplified BSD License.
-// See README.md for details.
-//
-
-//
-//
-// LaTeX rendering backend
-//
-//
-
-package blackfriday
-
-import (
-	"bytes"
-	"strings"
-)
-
-// Latex is a type that implements the Renderer interface for LaTeX output.
-//
-// Do not create this directly, instead use the LatexRenderer function.
-type Latex struct {
-}
-
-// LatexRenderer creates and configures a Latex object, which
-// satisfies the Renderer interface.
-//
-// flags is a set of LATEX_* options ORed together (currently no such options
-// are defined).
-func LatexRenderer(flags int) Renderer {
-	return &Latex{}
-}
-
-func (options *Latex) GetFlags() int {
-	return 0
-}
-
-// render code chunks using verbatim, or listings if we have a language
-func (options *Latex) BlockCode(out *bytes.Buffer, text []byte, info string) {
-	if info == "" {
-		out.WriteString("\n\\begin{verbatim}\n")
-	} else {
-		lang := strings.Fields(info)[0]
-		out.WriteString("\n\\begin{lstlisting}[language=")
-		out.WriteString(lang)
-		out.WriteString("]\n")
-	}
-	out.Write(text)
-	if info == "" {
-		out.WriteString("\n\\end{verbatim}\n")
-	} else {
-		out.WriteString("\n\\end{lstlisting}\n")
-	}
-}
-
-func (options *Latex) TitleBlock(out *bytes.Buffer, text []byte) {
-
-}
-
-func (options *Latex) BlockQuote(out *bytes.Buffer, text []byte) {
-	out.WriteString("\n\\begin{quotation}\n")
-	out.Write(text)
-	out.WriteString("\n\\end{quotation}\n")
-}
-
-func (options *Latex) BlockHtml(out *bytes.Buffer, text []byte) {
-	// a pretty lame thing to do...
-	out.WriteString("\n\\begin{verbatim}\n")
-	out.Write(text)
-	out.WriteString("\n\\end{verbatim}\n")
-}
-
-func (options *Latex) Header(out *bytes.Buffer, text func() bool, level int, id string) {
-	marker := out.Len()
-
-	switch level {
-	case 1:
-		out.WriteString("\n\\section{")
-	case 2:
-		out.WriteString("\n\\subsection{")
-	case 3:
-		out.WriteString("\n\\subsubsection{")
-	case 4:
-		out.WriteString("\n\\paragraph{")
-	case 5:
-		out.WriteString("\n\\subparagraph{")
-	case 6:
-		out.WriteString("\n\\textbf{")
-	}
-	if !text() {
-		out.Truncate(marker)
-		return
-	}
-	out.WriteString("}\n")
-}
-
-func (options *Latex) HRule(out *bytes.Buffer) {
-	out.WriteString("\n\\HRule\n")
-}
-
-func (options *Latex) List(out *bytes.Buffer, text func() bool, flags int) {
-	marker := out.Len()
-	if flags&LIST_TYPE_ORDERED != 0 {
-		out.WriteString("\n\\begin{enumerate}\n")
-	} else {
-		out.WriteString("\n\\begin{itemize}\n")
-	}
-	if !text() {
-		out.Truncate(marker)
-		return
-	}
-	if flags&LIST_TYPE_ORDERED != 0 {
-		out.WriteString("\n\\end{enumerate}\n")
-	} else {
-		out.WriteString("\n\\end{itemize}\n")
-	}
-}
-
-func (options *Latex) ListItem(out *bytes.Buffer, text []byte, flags int) {
-	out.WriteString("\n\\item ")
-	out.Write(text)
-}
-
-func (options *Latex) Paragraph(out *bytes.Buffer, text func() bool) {
-	marker := out.Len()
-	out.WriteString("\n")
-	if !text() {
-		out.Truncate(marker)
-		return
-	}
-	out.WriteString("\n")
-}
-
-func (options *Latex) Table(out *bytes.Buffer, header []byte, body []byte, columnData []int) {
-	out.WriteString("\n\\begin{tabular}{")
-	for _, elt := range columnData {
-		switch elt {
-		case TABLE_ALIGNMENT_LEFT:
-			out.WriteByte('l')
-		case TABLE_ALIGNMENT_RIGHT:
-			out.WriteByte('r')
-		default:
-			out.WriteByte('c')
-		}
-	}
-	out.WriteString("}\n")
-	out.Write(header)
-	out.WriteString(" \\\\\n\\hline\n")
-	out.Write(body)
-	out.WriteString("\n\\end{tabular}\n")
-}
-
-func (options *Latex) TableRow(out *bytes.Buffer, text []byte) {
-	if out.Len() > 0 {
-		out.WriteString(" \\\\\n")
-	}
-	out.Write(text)
-}
-
-func (options *Latex) TableHeaderCell(out *bytes.Buffer, text []byte, align int) {
-	if out.Len() > 0 {
-		out.WriteString(" & ")
-	}
-	out.Write(text)
-}
-
-func (options *Latex) TableCell(out *bytes.Buffer, text []byte, align int) {
-	if out.Len() > 0 {
-		out.WriteString(" & ")
-	}
-	out.Write(text)
-}
-
-// TODO: this
-func (options *Latex) Footnotes(out *bytes.Buffer, text func() bool) {
-
-}
-
-func (options *Latex) FootnoteItem(out *bytes.Buffer, name, text []byte, flags int) {
-
-}
-
-func (options *Latex) AutoLink(out *bytes.Buffer, link []byte, kind int) {
-	out.WriteString("\\href{")
-	if kind == LINK_TYPE_EMAIL {
-		out.WriteString("mailto:")
-	}
-	out.Write(link)
-	out.WriteString("}{")
-	out.Write(link)
-	out.WriteString("}")
-}
-
-func (options *Latex) CodeSpan(out *bytes.Buffer, text []byte) {
-	out.WriteString("\\texttt{")
-	escapeSpecialChars(out, text)
-	out.WriteString("}")
-}
-
-func (options *Latex) DoubleEmphasis(out *bytes.Buffer, text []byte) {
-	out.WriteString("\\textbf{")
-	out.Write(text)
-	out.WriteString("}")
-}
-
-func (options *Latex) Emphasis(out *bytes.Buffer, text []byte) {
-	out.WriteString("\\textit{")
-	out.Write(text)
-	out.WriteString("}")
-}
-
-func (options *Latex) Image(out *bytes.Buffer, link []byte, title []byte, alt []byte) {
-	if bytes.HasPrefix(link, []byte("http://")) || bytes.HasPrefix(link, []byte("https://")) {
-		// treat it like a link
-		out.WriteString("\\href{")
-		out.Write(link)
-		out.WriteString("}{")
-		out.Write(alt)
-		out.WriteString("}")
-	} else {
-		out.WriteString("\\includegraphics{")
-		out.Write(link)
-		out.WriteString("}")
-	}
-}
-
-func (options *Latex) LineBreak(out *bytes.Buffer) {
-	out.WriteString(" \\\\\n")
-}
-
-func (options *Latex) Link(out *bytes.Buffer, link []byte, title []byte, content []byte) {
-	out.WriteString("\\href{")
-	out.Write(link)
-	out.WriteString("}{")
-	out.Write(content)
-	out.WriteString("}")
-}
-
-func (options *Latex) RawHtmlTag(out *bytes.Buffer, tag []byte) {
-}
-
-func (options *Latex) TripleEmphasis(out *bytes.Buffer, text []byte) {
-	out.WriteString("\\textbf{\\textit{")
-	out.Write(text)
-	out.WriteString("}}")
-}
-
-func (options *Latex) StrikeThrough(out *bytes.Buffer, text []byte) {
-	out.WriteString("\\sout{")
-	out.Write(text)
-	out.WriteString("}")
-}
-
-// TODO: this
-func (options *Latex) FootnoteRef(out *bytes.Buffer, ref []byte, id int) {
-
-}
-
-func needsBackslash(c byte) bool {
-	for _, r := range []byte("_{}%$&\\~#") {
-		if c == r {
-			return true
-		}
-	}
-	return false
-}
-
-func escapeSpecialChars(out *bytes.Buffer, text []byte) {
-	for i := 0; i < len(text); i++ {
-		// directly copy normal characters
-		org := i
-
-		for i < len(text) && !needsBackslash(text[i]) {
-			i++
-		}
-		if i > org {
-			out.Write(text[org:i])
-		}
-
-		// escape a character
-		if i >= len(text) {
-			break
-		}
-		out.WriteByte('\\')
-		out.WriteByte(text[i])
-	}
-}
-
-func (options *Latex) Entity(out *bytes.Buffer, entity []byte) {
-	// TODO: convert this into a unicode character or something
-	out.Write(entity)
-}
-
-func (options *Latex) NormalText(out *bytes.Buffer, text []byte) {
-	escapeSpecialChars(out, text)
-}
-
-// header and footer
-func (options *Latex) DocumentHeader(out *bytes.Buffer) {
-	out.WriteString("\\documentclass{article}\n")
-	out.WriteString("\n")
-	out.WriteString("\\usepackage{graphicx}\n")
-	out.WriteString("\\usepackage{listings}\n")
-	out.WriteString("\\usepackage[margin=1in]{geometry}\n")
-	out.WriteString("\\usepackage[utf8]{inputenc}\n")
-	out.WriteString("\\usepackage{verbatim}\n")
-	out.WriteString("\\usepackage[normalem]{ulem}\n")
-	out.WriteString("\\usepackage{hyperref}\n")
-	out.WriteString("\n")
-	out.WriteString("\\hypersetup{colorlinks,%\n")
-	out.WriteString("  citecolor=black,%\n")
-	out.WriteString("  filecolor=black,%\n")
-	out.WriteString("  linkcolor=black,%\n")
-	out.WriteString("  urlcolor=black,%\n")
-	out.WriteString("  pdfstartview=FitH,%\n")
-	out.WriteString("  breaklinks=true,%\n")
-	out.WriteString("  pdfauthor={Blackfriday Markdown Processor v")
-	out.WriteString(VERSION)
-	out.WriteString("}}\n")
-	out.WriteString("\n")
-	out.WriteString("\\newcommand{\\HRule}{\\rule{\\linewidth}{0.5mm}}\n")
-	out.WriteString("\\addtolength{\\parskip}{0.5\\baselineskip}\n")
-	out.WriteString("\\parindent=0pt\n")
-	out.WriteString("\n")
-	out.WriteString("\\begin{document}\n")
-}
-
-func (options *Latex) DocumentFooter(out *bytes.Buffer) {
-	out.WriteString("\n\\end{document}\n")
-}

vendor/github.com/russross/blackfriday/v2/.travis.yml

@@ -1,30 +1,17 @@
 sudo: false
 language: go
 go:
-  - 1.5.4
+  - "1.10.x"
-  - 1.6.2
+  - "1.11.x"
   - tip
 matrix:
-  include:
+  fast_finish: true
-    - go: 1.2.2
-      script:
-        - go get -t -v ./...
-        - go test -v -race ./...
-    - go: 1.3.3
-      script:
-        - go get -t -v ./...
-        - go test -v -race ./...
-    - go: 1.4.3
-      script:
-        - go get -t -v ./...
-        - go test -v -race ./...
   allow_failures:
     - go: tip
-  fast_finish: true
 install:
   - # Do nothing. This is needed to prevent default install action "go get -t -v ./..." from happening here (we want it to happen inside script step).
 script:
   - go get -t -v ./...
   - diff -u <(echo -n) <(gofmt -d -s .)
   - go tool vet .
-  - go test -v -race ./...
+  - go test -v ./...

vendor/github.com/russross/blackfriday/v2/README.md

@@ -1,6 +1,4 @@
-Blackfriday
+Blackfriday [![Build Status](https://travis-ci.org/russross/blackfriday.svg?branch=master)](https://travis-ci.org/russross/blackfriday)
-[![Build Status][BuildSVG]][BuildURL]
-[![Godoc][GodocV2SVG]][GodocV2URL]
 ===========
 
 Blackfriday is a [Markdown][1] processor implemented in [Go][2]. It
@@ -18,12 +16,18 @@ It started as a translation from C of [Sundown][3].
 Installation
 ------------
 
-Blackfriday is compatible with any modern Go release. With Go and git installed:
+Blackfriday is compatible with any modern Go release. With Go 1.7 and git
+installed:
 
-    go get -u gopkg.in/russross/blackfriday.v2
+    go get gopkg.in/russross/blackfriday.v2
 
-will download, compile, and install the package into your `$GOPATH` directory
+will download, compile, and install the package into your `$GOPATH`
-hierarchy.
+directory hierarchy. Alternatively, you can achieve the same if you
+import it into a project:
+
+    import "gopkg.in/russross/blackfriday.v2"
+
+and `go get` without parameters.
 
 
 Versions
@@ -34,7 +38,7 @@ developed on its own branch: https://github.com/russross/blackfriday/tree/v2 and
 documentation is available at
 https://godoc.org/gopkg.in/russross/blackfriday.v2.
 
-It is `go get`-able via [gopkg.in][6] at `gopkg.in/russross/blackfriday.v2`,
+It is `go get`-able via via [gopkg.in][6] at `gopkg.in/russross/blackfriday.v2`,
 but we highly recommend using package management tool like [dep][7] or
 [Glide][8] and make use of semantic versioning. With package management you
 should import `github.com/russross/blackfriday` and specify that you're using
@@ -58,43 +62,9 @@ Potential drawbacks:
   v2. See issue [#348](https://github.com/russross/blackfriday/issues/348) for
   tracking.
 
-If you are still interested in the legacy `v1`, you can import it from
-`github.com/russross/blackfriday`. Documentation for the legacy v1 can be found
-here: https://godoc.org/github.com/russross/blackfriday
-
-### Known issue with `dep`
-
-There is a known problem with using Blackfriday v1 _transitively_ and `dep`.
-Currently `dep` prioritizes semver versions over anything else, and picks the
-latest one, plus it does not apply a `[[constraint]]` specifier to transitively
-pulled in packages. So if you're using something that uses Blackfriday v1, but
-that something does not use `dep` yet, you will get Blackfriday v2 pulled in and
-your first dependency will fail to build.
-
-There are couple of fixes for it, documented here:
-https://github.com/golang/dep/blob/master/docs/FAQ.md#how-do-i-constrain-a-transitive-dependencys-version
-
-Meanwhile, `dep` team is working on a more general solution to the constraints
-on transitive dependencies problem: https://github.com/golang/dep/issues/1124.
-
-
 Usage
 -----
 
-### v1
-
-For basic usage, it is as simple as getting your input into a byte
-slice and calling:
-
-    output := blackfriday.MarkdownBasic(input)
-
-This renders it with no extensions enabled. To get a more useful
-feature set, use this instead:
-
-    output := blackfriday.MarkdownCommon(input)
-
-### v2
-
 For the most sensible markdown processing, it is as simple as getting your input
 into a byte slice and calling:
 
@@ -121,7 +91,7 @@ Here's an example of simple usage of Blackfriday together with Bluemonday:
 ```go
 import (
     "github.com/microcosm-cc/bluemonday"
-    "gopkg.in/russross/blackfriday.v2"
+    "github.com/russross/blackfriday"
 )
 
 // ...
@@ -129,21 +99,11 @@ unsafe := blackfriday.Run(input)
 html := bluemonday.UGCPolicy().SanitizeBytes(unsafe)
 ```
 
-### Custom options, v1
+### Custom options
-
-If you want to customize the set of options, first get a renderer
-(currently only the HTML output engine), then use it to
-call the more general `Markdown` function. For examples, see the
-implementations of `MarkdownBasic` and `MarkdownCommon` in
-`markdown.go`.
-
-### Custom options, v2
 
 If you want to customize the set of options, use `blackfriday.WithExtensions`,
 `blackfriday.WithRenderer` and `blackfriday.WithRefOverride`.
 
-### `blackfriday-tool`
-
 You can also check out `blackfriday-tool` for a more complete example
 of how to use it. Download and install it using:
 
@@ -163,22 +123,6 @@ installed in `$GOPATH/bin`.  This is a statically-linked binary that
 can be copied to wherever you need it without worrying about
 dependencies and library versions.
 
-### Sanitized anchor names
-
-Blackfriday includes an algorithm for creating sanitized anchor names
-corresponding to a given input text. This algorithm is used to create
-anchors for headings when `EXTENSION_AUTO_HEADER_IDS` is enabled. The
-algorithm has a specification, so that other packages can create
-compatible anchor names and links to those anchors.
-
-The specification is located at https://godoc.org/github.com/russross/blackfriday#hdr-Sanitized_Anchor_Names.
-
-[`SanitizedAnchorName`](https://godoc.org/github.com/russross/blackfriday#SanitizedAnchorName) exposes this functionality, and can be used to
-create compatible links to the anchor names generated by blackfriday.
-This algorithm is also implemented in a small standalone package at
-[`github.com/shurcooL/sanitized_anchor_name`](https://godoc.org/github.com/shurcooL/sanitized_anchor_name). It can be useful for clients
-that want a small package and don't need full functionality of blackfriday.
-
 
 Features
 --------
@@ -246,7 +190,7 @@ implements the following extensions:
     and supply a language (to make syntax highlighting simple). Just
     mark it like this:
 
-        ``` go
+        ```go
         func getTrue() bool {
             return true
         }
@@ -255,15 +199,6 @@ implements the following extensions:
     You can use 3 or more backticks to mark the beginning of the
     block, and the same number to mark the end of the block.
 
-    To preserve classes of fenced code blocks while using the bluemonday
-    HTML sanitizer, use the following policy:
-
-    ``` go
-    p := bluemonday.UGCPolicy()
-    p.AllowAttrs("class").Matching(regexp.MustCompile("^language-[a-zA-Z0-9]+$")).OnElements("code")
-    html := p.SanitizeBytes(unsafe)
-    ```
-
 *   **Definition lists**. A simple definition list is made of a single-line
     term followed by a colon and the definition for that term.
 
@@ -289,10 +224,8 @@ implements the following extensions:
 *   **Strikethrough**. Use two tildes (`~~`) to mark text that
     should be crossed out.
 
-*   **Hard line breaks**. With this extension enabled (it is off by
+*   **Hard line breaks**. With this extension enabled newlines in the input
-    default in the `MarkdownBasic` and `MarkdownCommon` convenience
+    translate into line breaks in the output. This extension is off by default.
-    functions), newlines in the input translate into line breaks in
-    the output.
 
 *   **Smart quotes**. Smartypants-style punctuation substitution is
     supported, turning normal double- and single-quote marks into
@@ -328,18 +261,20 @@ are a few of note:
 *   [markdownfmt](https://github.com/shurcooL/markdownfmt): like gofmt,
     but for markdown.
 
-*   [LaTeX output](https://bitbucket.org/ambrevar/blackfriday-latex):
+*   [LaTeX output](https://github.com/Ambrevar/Blackfriday-LaTeX):
     renders output as LaTeX.
 
+*   [Blackfriday-Confluence](https://github.com/kentaro-m/blackfriday-confluence): provides a [Confluence Wiki Markup](https://confluence.atlassian.com/doc/confluence-wiki-markup-251003035.html) renderer.
 
-TODO
+
+Todo
 ----
 
 *   More unit testing
-*   Improve Unicode support. It does not understand all Unicode
+*   Improve unicode support. It does not understand all unicode
     rules (about what constitutes a letter, a punctuation symbol,
     etc.), so it may fail to detect word boundaries correctly in
-    some instances. It is safe on all UTF-8 input.
+    some instances. It is safe on all utf-8 input.
 
 
 License
@@ -354,10 +289,3 @@ License
    [4]: https://godoc.org/gopkg.in/russross/blackfriday.v2#Parse "Parse func"
    [5]: https://github.com/microcosm-cc/bluemonday "Bluemonday"
    [6]: https://labix.org/gopkg.in "gopkg.in"
-   [7]: https://github.com/golang/dep/ "dep"
-   [8]: https://github.com/Masterminds/glide "Glide"
-
-   [BuildSVG]: https://travis-ci.org/russross/blackfriday.svg?branch=master
-   [BuildURL]: https://travis-ci.org/russross/blackfriday
-   [GodocV2SVG]: https://godoc.org/gopkg.in/russross/blackfriday.v2?status.svg
-   [GodocV2URL]: https://godoc.org/gopkg.in/russross/blackfriday.v2

vendor/github.com/russross/blackfriday/v2/doc.go

@@ -0,0 +1,18 @@
+// Package blackfriday is a markdown processor.
+//
+// It translates plain text with simple formatting rules into an AST, which can
+// then be further processed to HTML (provided by Blackfriday itself) or other
+// formats (provided by the community).
+//
+// The simplest way to invoke Blackfriday is to call the Run function. It will
+// take a text input and produce a text output in HTML (or other format).
+//
+// A slightly more sophisticated way to use Blackfriday is to create a Markdown
+// processor and to call Parse, which returns a syntax tree for the input
+// document. You can leverage Blackfriday's parsing for content extraction from
+// markdown documents. You can assign a custom renderer and set various options
+// to the Markdown processor.
+//
+// If you're interested in calling Blackfriday from command line, see
+// https://github.com/russross/blackfriday-tool.
+package blackfriday

vendor/github.com/russross/blackfriday/v2/esc.go

@@ -0,0 +1,34 @@
+package blackfriday
+
+import (
+	"html"
+	"io"
+)
+
+var htmlEscaper = [256][]byte{
+	'&': []byte("&"),
+	'<': []byte("&lt;"),
+	'>': []byte("&gt;"),
+	'"': []byte("&quot;"),
+}
+
+func escapeHTML(w io.Writer, s []byte) {
+	var start, end int
+	for end < len(s) {
+		escSeq := htmlEscaper[s[end]]
+		if escSeq != nil {
+			w.Write(s[start:end])
+			w.Write(escSeq)
+			start = end + 1
+		}
+		end++
+	}
+	if start < len(s) && end <= len(s) {
+		w.Write(s[start:end])
+	}
+}
+
+func escLink(w io.Writer, text []byte) {
+	unesc := html.UnescapeString(string(text))
+	escapeHTML(w, []byte(unesc))
+}

vendor/github.com/russross/blackfriday/v2/go.mod

@@ -0,0 +1 @@
+module github.com/russross/blackfriday/v2

vendor/github.com/russross/blackfriday/v2/html.go

@@ -0,0 +1,949 @@
+//
+// Blackfriday Markdown Processor
+// Available at http://github.com/russross/blackfriday
+//
+// Copyright © 2011 Russ Ross <russ@russross.com>.
+// Distributed under the Simplified BSD License.
+// See README.md for details.
+//
+
+//
+//
+// HTML rendering backend
+//
+//
+
+package blackfriday
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"regexp"
+	"strings"
+)
+
+// HTMLFlags control optional behavior of HTML renderer.
+type HTMLFlags int
+
+// HTML renderer configuration options.
+const (
+	HTMLFlagsNone           HTMLFlags = 0
+	SkipHTML                HTMLFlags = 1 << iota // Skip preformatted HTML blocks
+	SkipImages                                    // Skip embedded images
+	SkipLinks                                     // Skip all links
+	Safelink                                      // Only link to trusted protocols
+	NofollowLinks                                 // Only link with rel="nofollow"
+	NoreferrerLinks                               // Only link with rel="noreferrer"
+	NoopenerLinks                                 // Only link with rel="noopener"
+	HrefTargetBlank                               // Add a blank target
+	CompletePage                                  // Generate a complete HTML page
+	UseXHTML                                      // Generate XHTML output instead of HTML
+	FootnoteReturnLinks                           // Generate a link at the end of a footnote to return to the source
+	Smartypants                                   // Enable smart punctuation substitutions
+	SmartypantsFractions                          // Enable smart fractions (with Smartypants)
+	SmartypantsDashes                             // Enable smart dashes (with Smartypants)
+	SmartypantsLatexDashes                        // Enable LaTeX-style dashes (with Smartypants)
+	SmartypantsAngledQuotes                       // Enable angled double quotes (with Smartypants) for double quotes rendering
+	SmartypantsQuotesNBSP                         // Enable « French guillemets » (with Smartypants)
+	TOC                                           // Generate a table of contents
+)
+
+var (
+	htmlTagRe = regexp.MustCompile("(?i)^" + htmlTag)
+)
+
+const (
+	htmlTag = "(?:" + openTag + "|" + closeTag + "|" + htmlComment + "|" +
+		processingInstruction + "|" + declaration + "|" + cdata + ")"
+	closeTag              = "</" + tagName + "\\s*[>]"
+	openTag               = "<" + tagName + attribute + "*" + "\\s*/?>"
+	attribute             = "(?:" + "\\s+" + attributeName + attributeValueSpec + "?)"
+	attributeValue        = "(?:" + unquotedValue + "|" + singleQuotedValue + "|" + doubleQuotedValue + ")"
+	attributeValueSpec    = "(?:" + "\\s*=" + "\\s*" + attributeValue + ")"
+	attributeName         = "[a-zA-Z_:][a-zA-Z0-9:._-]*"
+	cdata                 = "<!\\[CDATA\\[[\\s\\S]*?\\]\\]>"
+	declaration           = "<![A-Z]+" + "\\s+[^>]*>"
+	doubleQuotedValue     = "\"[^\"]*\""
+	htmlComment           = "<!---->|<!--(?:-?[^>-])(?:-?[^-])*-->"
+	processingInstruction = "[<][?].*?[?][>]"
+	singleQuotedValue     = "'[^']*'"
+	tagName               = "[A-Za-z][A-Za-z0-9-]*"
+	unquotedValue         = "[^\"'=<>`\\x00-\\x20]+"
+)
+
+// HTMLRendererParameters is a collection of supplementary parameters tweaking
+// the behavior of various parts of HTML renderer.
+type HTMLRendererParameters struct {
+	// Prepend this text to each relative URL.
+	AbsolutePrefix string
+	// Add this text to each footnote anchor, to ensure uniqueness.
+	FootnoteAnchorPrefix string
+	// Show this text inside the <a> tag for a footnote return link, if the
+	// HTML_FOOTNOTE_RETURN_LINKS flag is enabled. If blank, the string
+	// <sup>[return]</sup> is used.
+	FootnoteReturnLinkContents string
+	// If set, add this text to the front of each Heading ID, to ensure
+	// uniqueness.
+	HeadingIDPrefix string
+	// If set, add this text to the back of each Heading ID, to ensure uniqueness.
+	HeadingIDSuffix string
+	// Increase heading levels: if the offset is 1, <h1> becomes <h2> etc.
+	// Negative offset is also valid.
+	// Resulting levels are clipped between 1 and 6.
+	HeadingLevelOffset int
+
+	Title string // Document title (used if CompletePage is set)
+	CSS   string // Optional CSS file URL (used if CompletePage is set)
+	Icon  string // Optional icon file URL (used if CompletePage is set)
+
+	Flags HTMLFlags // Flags allow customizing this renderer's behavior
+}
+
+// HTMLRenderer is a type that implements the Renderer interface for HTML output.
+//
+// Do not create this directly, instead use the NewHTMLRenderer function.
+type HTMLRenderer struct {
+	HTMLRendererParameters
+
+	closeTag string // how to end singleton tags: either " />" or ">"
+
+	// Track heading IDs to prevent ID collision in a single generation.
+	headingIDs map[string]int
+
+	lastOutputLen int
+	disableTags   int
+
+	sr *SPRenderer
+}
+
+const (
+	xhtmlClose = " />"
+	htmlClose  = ">"
+)
+
+// NewHTMLRenderer creates and configures an HTMLRenderer object, which
+// satisfies the Renderer interface.
+func NewHTMLRenderer(params HTMLRendererParameters) *HTMLRenderer {
+	// configure the rendering engine
+	closeTag := htmlClose
+	if params.Flags&UseXHTML != 0 {
+		closeTag = xhtmlClose
+	}
+
+	if params.FootnoteReturnLinkContents == "" {
+		params.FootnoteReturnLinkContents = `<sup>[return]</sup>`
+	}
+
+	return &HTMLRenderer{
+		HTMLRendererParameters: params,
+
+		closeTag:   closeTag,
+		headingIDs: make(map[string]int),
+
+		sr: NewSmartypantsRenderer(params.Flags),
+	}
+}
+
+func isHTMLTag(tag []byte, tagname string) bool {
+	found, _ := findHTMLTagPos(tag, tagname)
+	return found
+}
+
+// Look for a character, but ignore it when it's in any kind of quotes, it
+// might be JavaScript
+func skipUntilCharIgnoreQuotes(html []byte, start int, char byte) int {
+	inSingleQuote := false
+	inDoubleQuote := false
+	inGraveQuote := false
+	i := start
+	for i < len(html) {
+		switch {
+		case html[i] == char && !inSingleQuote && !inDoubleQuote && !inGraveQuote:
+			return i
+		case html[i] == '\'':
+			inSingleQuote = !inSingleQuote
+		case html[i] == '"':
+			inDoubleQuote = !inDoubleQuote
+		case html[i] == '`':
+			inGraveQuote = !inGraveQuote
+		}
+		i++
+	}
+	return start
+}
+
+func findHTMLTagPos(tag []byte, tagname string) (bool, int) {
+	i := 0
+	if i < len(tag) && tag[0] != '<' {
+		return false, -1
+	}
+	i++
+	i = skipSpace(tag, i)
+
+	if i < len(tag) && tag[i] == '/' {
+		i++
+	}
+
+	i = skipSpace(tag, i)
+	j := 0
+	for ; i < len(tag); i, j = i+1, j+1 {
+		if j >= len(tagname) {
+			break
+		}
+
+		if strings.ToLower(string(tag[i]))[0] != tagname[j] {
+			return false, -1
+		}
+	}
+
+	if i == len(tag) {
+		return false, -1
+	}
+
+	rightAngle := skipUntilCharIgnoreQuotes(tag, i, '>')
+	if rightAngle >= i {
+		return true, rightAngle
+	}
+
+	return false, -1
+}
+
+func skipSpace(tag []byte, i int) int {
+	for i < len(tag) && isspace(tag[i]) {
+		i++
+	}
+	return i
+}
+
+func isRelativeLink(link []byte) (yes bool) {
+	// a tag begin with '#'
+	if link[0] == '#' {
+		return true
+	}
+
+	// link begin with '/' but not '//', the second maybe a protocol relative link
+	if len(link) >= 2 && link[0] == '/' && link[1] != '/' {
+		return true
+	}
+
+	// only the root '/'
+	if len(link) == 1 && link[0] == '/' {
+		return true
+	}
+
+	// current directory : begin with "./"
+	if bytes.HasPrefix(link, []byte("./")) {
+		return true
+	}
+
+	// parent directory : begin with "../"
+	if bytes.HasPrefix(link, []byte("../")) {
+		return true
+	}
+
+	return false
+}
+
+func (r *HTMLRenderer) ensureUniqueHeadingID(id string) string {
+	for count, found := r.headingIDs[id]; found; count, found = r.headingIDs[id] {
+		tmp := fmt.Sprintf("%s-%d", id, count+1)
+
+		if _, tmpFound := r.headingIDs[tmp]; !tmpFound {
+			r.headingIDs[id] = count + 1
+			id = tmp
+		} else {
+			id = id + "-1"
+		}
+	}
+
+	if _, found := r.headingIDs[id]; !found {
+		r.headingIDs[id] = 0
+	}
+
+	return id
+}
+
+func (r *HTMLRenderer) addAbsPrefix(link []byte) []byte {
+	if r.AbsolutePrefix != "" && isRelativeLink(link) && link[0] != '.' {
+		newDest := r.AbsolutePrefix
+		if link[0] != '/' {
+			newDest += "/"
+		}
+		newDest += string(link)
+		return []byte(newDest)
+	}
+	return link
+}
+
+func appendLinkAttrs(attrs []string, flags HTMLFlags, link []byte) []string {
+	if isRelativeLink(link) {
+		return attrs
+	}
+	val := []string{}
+	if flags&NofollowLinks != 0 {
+		val = append(val, "nofollow")
+	}
+	if flags&NoreferrerLinks != 0 {
+		val = append(val, "noreferrer")
+	}
+	if flags&NoopenerLinks != 0 {
+		val = append(val, "noopener")
+	}
+	if flags&HrefTargetBlank != 0 {
+		attrs = append(attrs, "target=\"_blank\"")
+	}
+	if len(val) == 0 {
+		return attrs
+	}
+	attr := fmt.Sprintf("rel=%q", strings.Join(val, " "))
+	return append(attrs, attr)
+}
+
+func isMailto(link []byte) bool {
+	return bytes.HasPrefix(link, []byte("mailto:"))
+}
+
+func needSkipLink(flags HTMLFlags, dest []byte) bool {
+	if flags&SkipLinks != 0 {
+		return true
+	}
+	return flags&Safelink != 0 && !isSafeLink(dest) && !isMailto(dest)
+}
+
+func isSmartypantable(node *Node) bool {
+	pt := node.Parent.Type
+	return pt != Link && pt != CodeBlock && pt != Code
+}
+
+func appendLanguageAttr(attrs []string, info []byte) []string {
+	if len(info) == 0 {
+		return attrs
+	}
+	endOfLang := bytes.IndexAny(info, "\t ")
+	if endOfLang < 0 {
+		endOfLang = len(info)
+	}
+	return append(attrs, fmt.Sprintf("class=\"language-%s\"", info[:endOfLang]))
+}
+
+func (r *HTMLRenderer) tag(w io.Writer, name []byte, attrs []string) {
+	w.Write(name)
+	if len(attrs) > 0 {
+		w.Write(spaceBytes)
+		w.Write([]byte(strings.Join(attrs, " ")))
+	}
+	w.Write(gtBytes)
+	r.lastOutputLen = 1
+}
+
+func footnoteRef(prefix string, node *Node) []byte {
+	urlFrag := prefix + string(slugify(node.Destination))
+	anchor := fmt.Sprintf(`<a href="#fn:%s">%d</a>`, urlFrag, node.NoteID)
+	return []byte(fmt.Sprintf(`<sup class="footnote-ref" id="fnref:%s">%s</sup>`, urlFrag, anchor))
+}
+
+func footnoteItem(prefix string, slug []byte) []byte {
+	return []byte(fmt.Sprintf(`<li id="fn:%s%s">`, prefix, slug))
+}
+
+func footnoteReturnLink(prefix, returnLink string, slug []byte) []byte {
+	const format = ` <a class="footnote-return" href="#fnref:%s%s">%s</a>`
+	return []byte(fmt.Sprintf(format, prefix, slug, returnLink))
+}
+
+func itemOpenCR(node *Node) bool {
+	if node.Prev == nil {
+		return false
+	}
+	ld := node.Parent.ListData
+	return !ld.Tight && ld.ListFlags&ListTypeDefinition == 0
+}
+
+func skipParagraphTags(node *Node) bool {
+	grandparent := node.Parent.Parent
+	if grandparent == nil || grandparent.Type != List {
+		return false
+	}
+	tightOrTerm := grandparent.Tight || node.Parent.ListFlags&ListTypeTerm != 0
+	return grandparent.Type == List && tightOrTerm
+}
+
+func cellAlignment(align CellAlignFlags) string {
+	switch align {
+	case TableAlignmentLeft:
+		return "left"
+	case TableAlignmentRight:
+		return "right"
+	case TableAlignmentCenter:
+		return "center"
+	default:
+		return ""
+	}
+}
+
+func (r *HTMLRenderer) out(w io.Writer, text []byte) {
+	if r.disableTags > 0 {
+		w.Write(htmlTagRe.ReplaceAll(text, []byte{}))
+	} else {
+		w.Write(text)
+	}
+	r.lastOutputLen = len(text)
+}
+
+func (r *HTMLRenderer) cr(w io.Writer) {
+	if r.lastOutputLen > 0 {
+		r.out(w, nlBytes)
+	}
+}
+
+var (
+	nlBytes    = []byte{'\n'}
+	gtBytes    = []byte{'>'}
+	spaceBytes = []byte{' '}
+)
+
+var (
+	brTag              = []byte("<br>")
+	brXHTMLTag         = []byte("<br />")
+	emTag              = []byte("<em>")
+	emCloseTag         = []byte("</em>")
+	strongTag          = []byte("<strong>")
+	strongCloseTag     = []byte("</strong>")
+	delTag             = []byte("<del>")
+	delCloseTag        = []byte("</del>")
+	ttTag              = []byte("<tt>")
+	ttCloseTag         = []byte("</tt>")
+	aTag               = []byte("<a")
+	aCloseTag          = []byte("</a>")
+	preTag             = []byte("<pre>")
+	preCloseTag        = []byte("</pre>")
+	codeTag            = []byte("<code>")
+	codeCloseTag       = []byte("</code>")
+	pTag               = []byte("<p>")
+	pCloseTag          = []byte("</p>")
+	blockquoteTag      = []byte("<blockquote>")
+	blockquoteCloseTag = []byte("</blockquote>")
+	hrTag              = []byte("<hr>")
+	hrXHTMLTag         = []byte("<hr />")
+	ulTag              = []byte("<ul>")
+	ulCloseTag         = []byte("</ul>")
+	olTag              = []byte("<ol>")
+	olCloseTag         = []byte("</ol>")
+	dlTag              = []byte("<dl>")
+	dlCloseTag         = []byte("</dl>")
+	liTag              = []byte("<li>")
+	liCloseTag         = []byte("</li>")
+	ddTag              = []byte("<dd>")
+	ddCloseTag         = []byte("</dd>")
+	dtTag              = []byte("<dt>")
+	dtCloseTag         = []byte("</dt>")
+	tableTag           = []byte("<table>")
+	tableCloseTag      = []byte("</table>")
+	tdTag              = []byte("<td")
+	tdCloseTag         = []byte("</td>")
+	thTag              = []byte("<th")
+	thCloseTag         = []byte("</th>")
+	theadTag           = []byte("<thead>")
+	theadCloseTag      = []byte("</thead>")
+	tbodyTag           = []byte("<tbody>")
+	tbodyCloseTag      = []byte("</tbody>")
+	trTag              = []byte("<tr>")
+	trCloseTag         = []byte("</tr>")
+	h1Tag              = []byte("<h1")
+	h1CloseTag         = []byte("</h1>")
+	h2Tag              = []byte("<h2")
+	h2CloseTag         = []byte("</h2>")
+	h3Tag              = []byte("<h3")
+	h3CloseTag         = []byte("</h3>")
+	h4Tag              = []byte("<h4")
+	h4CloseTag         = []byte("</h4>")
+	h5Tag              = []byte("<h5")
+	h5CloseTag         = []byte("</h5>")
+	h6Tag              = []byte("<h6")
+	h6CloseTag         = []byte("</h6>")
+
+	footnotesDivBytes      = []byte("\n<div class=\"footnotes\">\n\n")
+	footnotesCloseDivBytes = []byte("\n</div>\n")
+)
+
+func headingTagsFromLevel(level int) ([]byte, []byte) {
+	if level <= 1 {
+		return h1Tag, h1CloseTag
+	}
+	switch level {
+	case 2:
+		return h2Tag, h2CloseTag
+	case 3:
+		return h3Tag, h3CloseTag
+	case 4:
+		return h4Tag, h4CloseTag
+	case 5:
+		return h5Tag, h5CloseTag
+	}
+	return h6Tag, h6CloseTag
+}
+
+func (r *HTMLRenderer) outHRTag(w io.Writer) {
+	if r.Flags&UseXHTML == 0 {
+		r.out(w, hrTag)
+	} else {
+		r.out(w, hrXHTMLTag)
+	}
+}
+
+// RenderNode is a default renderer of a single node of a syntax tree. For
+// block nodes it will be called twice: first time with entering=true, second
+// time with entering=false, so that it could know when it's working on an open
+// tag and when on close. It writes the result to w.
+//
+// The return value is a way to tell the calling walker to adjust its walk
+// pattern: e.g. it can terminate the traversal by returning Terminate. Or it
+// can ask the walker to skip a subtree of this node by returning SkipChildren.
+// The typical behavior is to return GoToNext, which asks for the usual
+// traversal to the next node.
+func (r *HTMLRenderer) RenderNode(w io.Writer, node *Node, entering bool) WalkStatus {
+	attrs := []string{}
+	switch node.Type {
+	case Text:
+		if r.Flags&Smartypants != 0 {
+			var tmp bytes.Buffer
+			escapeHTML(&tmp, node.Literal)
+			r.sr.Process(w, tmp.Bytes())
+		} else {
+			if node.Parent.Type == Link {
+				escLink(w, node.Literal)
+			} else {
+				escapeHTML(w, node.Literal)
+			}
+		}
+	case Softbreak:
+		r.cr(w)
+		// TODO: make it configurable via out(renderer.softbreak)
+	case Hardbreak:
+		if r.Flags&UseXHTML == 0 {
+			r.out(w, brTag)
+		} else {
+			r.out(w, brXHTMLTag)
+		}
+		r.cr(w)
+	case Emph:
+		if entering {
+			r.out(w, emTag)
+		} else {
+			r.out(w, emCloseTag)
+		}
+	case Strong:
+		if entering {
+			r.out(w, strongTag)
+		} else {
+			r.out(w, strongCloseTag)
+		}
+	case Del:
+		if entering {
+			r.out(w, delTag)
+		} else {
+			r.out(w, delCloseTag)
+		}
+	case HTMLSpan:
+		if r.Flags&SkipHTML != 0 {
+			break
+		}
+		r.out(w, node.Literal)
+	case Link:
+		// mark it but don't link it if it is not a safe link: no smartypants
+		dest := node.LinkData.Destination
+		if needSkipLink(r.Flags, dest) {
+			if entering {
+				r.out(w, ttTag)
+			} else {
+				r.out(w, ttCloseTag)
+			}
+		} else {
+			if entering {
+				dest = r.addAbsPrefix(dest)
+				var hrefBuf bytes.Buffer
+				hrefBuf.WriteString("href=\"")
+				escLink(&hrefBuf, dest)
+				hrefBuf.WriteByte('"')
+				attrs = append(attrs, hrefBuf.String())
+				if node.NoteID != 0 {
+					r.out(w, footnoteRef(r.FootnoteAnchorPrefix, node))
+					break
+				}
+				attrs = appendLinkAttrs(attrs, r.Flags, dest)
+				if len(node.LinkData.Title) > 0 {
+					var titleBuff bytes.Buffer
+					titleBuff.WriteString("title=\"")
+					escapeHTML(&titleBuff, node.LinkData.Title)
+					titleBuff.WriteByte('"')
+					attrs = append(attrs, titleBuff.String())
+				}
+				r.tag(w, aTag, attrs)
+			} else {
+				if node.NoteID != 0 {
+					break
+				}
+				r.out(w, aCloseTag)
+			}
+		}
+	case Image:
+		if r.Flags&SkipImages != 0 {
+			return SkipChildren
+		}
+		if entering {
+			dest := node.LinkData.Destination
+			dest = r.addAbsPrefix(dest)
+			if r.disableTags == 0 {
+				//if options.safe && potentiallyUnsafe(dest) {
+				//out(w, `<img src="" alt="`)
+				//} else {
+				r.out(w, []byte(`<img src="`))
+				escLink(w, dest)
+				r.out(w, []byte(`" alt="`))
+				//}
+			}
+			r.disableTags++
+		} else {
+			r.disableTags--
+			if r.disableTags == 0 {
+				if node.LinkData.Title != nil {
+					r.out(w, []byte(`" title="`))
+					escapeHTML(w, node.LinkData.Title)
+				}
+				r.out(w, []byte(`" />`))
+			}
+		}
+	case Code:
+		r.out(w, codeTag)
+		escapeHTML(w, node.Literal)
+		r.out(w, codeCloseTag)
+	case Document:
+		break
+	case Paragraph:
+		if skipParagraphTags(node) {
+			break
+		}
+		if entering {
+			// TODO: untangle this clusterfuck about when the newlines need
+			// to be added and when not.
+			if node.Prev != nil {
+				switch node.Prev.Type {
+				case HTMLBlock, List, Paragraph, Heading, CodeBlock, BlockQuote, HorizontalRule:
+					r.cr(w)
+				}
+			}
+			if node.Parent.Type == BlockQuote && node.Prev == nil {
+				r.cr(w)
+			}
+			r.out(w, pTag)
+		} else {
+			r.out(w, pCloseTag)
+			if !(node.Parent.Type == Item && node.Next == nil) {
+				r.cr(w)
+			}
+		}
+	case BlockQuote:
+		if entering {
+			r.cr(w)
+			r.out(w, blockquoteTag)
+		} else {
+			r.out(w, blockquoteCloseTag)
+			r.cr(w)
+		}
+	case HTMLBlock:
+		if r.Flags&SkipHTML != 0 {
+			break
+		}
+		r.cr(w)
+		r.out(w, node.Literal)
+		r.cr(w)
+	case Heading:
+		headingLevel := r.HTMLRendererParameters.HeadingLevelOffset + node.Level
+		openTag, closeTag := headingTagsFromLevel(headingLevel)
+		if entering {
+			if node.IsTitleblock {
+				attrs = append(attrs, `class="title"`)
+			}
+			if node.HeadingID != "" {
+				id := r.ensureUniqueHeadingID(node.HeadingID)
+				if r.HeadingIDPrefix != "" {
+					id = r.HeadingIDPrefix + id
+				}
+				if r.HeadingIDSuffix != "" {
+					id = id + r.HeadingIDSuffix
+				}
+				attrs = append(attrs, fmt.Sprintf(`id="%s"`, id))
+			}
+			r.cr(w)
+			r.tag(w, openTag, attrs)
+		} else {
+			r.out(w, closeTag)
+			if !(node.Parent.Type == Item && node.Next == nil) {
+				r.cr(w)
+			}
+		}
+	case HorizontalRule:
+		r.cr(w)
+		r.outHRTag(w)
+		r.cr(w)
+	case List:
+		openTag := ulTag
+		closeTag := ulCloseTag
+		if node.ListFlags&ListTypeOrdered != 0 {
+			openTag = olTag
+			closeTag = olCloseTag
+		}
+		if node.ListFlags&ListTypeDefinition != 0 {
+			openTag = dlTag
+			closeTag = dlCloseTag
+		}
+		if entering {
+			if node.IsFootnotesList {
+				r.out(w, footnotesDivBytes)
+				r.outHRTag(w)
+				r.cr(w)
+			}
+			r.cr(w)
+			if node.Parent.Type == Item && node.Parent.Parent.Tight {
+				r.cr(w)
+			}
+			r.tag(w, openTag[:len(openTag)-1], attrs)
+			r.cr(w)
+		} else {
+			r.out(w, closeTag)
+			//cr(w)
+			//if node.parent.Type != Item {
+			//	cr(w)
+			//}
+			if node.Parent.Type == Item && node.Next != nil {
+				r.cr(w)
+			}
+			if node.Parent.Type == Document || node.Parent.Type == BlockQuote {
+				r.cr(w)
+			}
+			if node.IsFootnotesList {
+				r.out(w, footnotesCloseDivBytes)
+			}
+		}
+	case Item:
+		openTag := liTag
+		closeTag := liCloseTag
+		if node.ListFlags&ListTypeDefinition != 0 {
+			openTag = ddTag
+			closeTag = ddCloseTag
+		}
+		if node.ListFlags&ListTypeTerm != 0 {
+			openTag = dtTag
+			closeTag = dtCloseTag
+		}
+		if entering {
+			if itemOpenCR(node) {
+				r.cr(w)
+			}
+			if node.ListData.RefLink != nil {
+				slug := slugify(node.ListData.RefLink)
+				r.out(w, footnoteItem(r.FootnoteAnchorPrefix, slug))
+				break
+			}
+			r.out(w, openTag)
+		} else {
+			if node.ListData.RefLink != nil {
+				slug := slugify(node.ListData.RefLink)
+				if r.Flags&FootnoteReturnLinks != 0 {
+					r.out(w, footnoteReturnLink(r.FootnoteAnchorPrefix, r.FootnoteReturnLinkContents, slug))
+				}
+			}
+			r.out(w, closeTag)
+			r.cr(w)
+		}
+	case CodeBlock:
+		attrs = appendLanguageAttr(attrs, node.Info)
+		r.cr(w)
+		r.out(w, preTag)
+		r.tag(w, codeTag[:len(codeTag)-1], attrs)
+		escapeHTML(w, node.Literal)
+		r.out(w, codeCloseTag)
+		r.out(w, preCloseTag)
+		if node.Parent.Type != Item {
+			r.cr(w)
+		}
+	case Table:
+		if entering {
+			r.cr(w)
+			r.out(w, tableTag)
+		} else {
+			r.out(w, tableCloseTag)
+			r.cr(w)
+		}
+	case TableCell:
+		openTag := tdTag
+		closeTag := tdCloseTag
+		if node.IsHeader {
+			openTag = thTag
+			closeTag = thCloseTag
+		}
+		if entering {
+			align := cellAlignment(node.Align)
+			if align != "" {
+				attrs = append(attrs, fmt.Sprintf(`align="%s"`, align))
+			}
+			if node.Prev == nil {
+				r.cr(w)
+			}
+			r.tag(w, openTag, attrs)
+		} else {
+			r.out(w, closeTag)
+			r.cr(w)
+		}
+	case TableHead:
+		if entering {
+			r.cr(w)
+			r.out(w, theadTag)
+		} else {
+			r.out(w, theadCloseTag)
+			r.cr(w)
+		}
+	case TableBody:
+		if entering {
+			r.cr(w)
+			r.out(w, tbodyTag)
+			// XXX: this is to adhere to a rather silly test. Should fix test.
+			if node.FirstChild == nil {
+				r.cr(w)
+			}
+		} else {
+			r.out(w, tbodyCloseTag)
+			r.cr(w)
+		}
+	case TableRow:
+		if entering {
+			r.cr(w)
+			r.out(w, trTag)
+		} else {
+			r.out(w, trCloseTag)
+			r.cr(w)
+		}
+	default:
+		panic("Unknown node type " + node.Type.String())
+	}
+	return GoToNext
+}
+
+// RenderHeader writes HTML document preamble and TOC if requested.
+func (r *HTMLRenderer) RenderHeader(w io.Writer, ast *Node) {
+	r.writeDocumentHeader(w)
+	if r.Flags&TOC != 0 {
+		r.writeTOC(w, ast)
+	}
+}
+
+// RenderFooter writes HTML document footer.
+func (r *HTMLRenderer) RenderFooter(w io.Writer, ast *Node) {
+	if r.Flags&CompletePage == 0 {
+		return
+	}
+	io.WriteString(w, "\n</body>\n</html>\n")
+}
+
+func (r *HTMLRenderer) writeDocumentHeader(w io.Writer) {
+	if r.Flags&CompletePage == 0 {
+		return
+	}
+	ending := ""
+	if r.Flags&UseXHTML != 0 {
+		io.WriteString(w, "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" ")
+		io.WriteString(w, "\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n")
+		io.WriteString(w, "<html xmlns=\"http://www.w3.org/1999/xhtml\">\n")
+		ending = " /"
+	} else {
+		io.WriteString(w, "<!DOCTYPE html>\n")
+		io.WriteString(w, "<html>\n")
+	}
+	io.WriteString(w, "<head>\n")
+	io.WriteString(w, "  <title>")
+	if r.Flags&Smartypants != 0 {
+		r.sr.Process(w, []byte(r.Title))
+	} else {
+		escapeHTML(w, []byte(r.Title))
+	}
+	io.WriteString(w, "</title>\n")
+	io.WriteString(w, "  <meta name=\"GENERATOR\" content=\"Blackfriday Markdown Processor v")
+	io.WriteString(w, Version)
+	io.WriteString(w, "\"")
+	io.WriteString(w, ending)
+	io.WriteString(w, ">\n")
+	io.WriteString(w, "  <meta charset=\"utf-8\"")
+	io.WriteString(w, ending)
+	io.WriteString(w, ">\n")
+	if r.CSS != "" {
+		io.WriteString(w, "  <link rel=\"stylesheet\" type=\"text/css\" href=\"")
+		escapeHTML(w, []byte(r.CSS))
+		io.WriteString(w, "\"")
+		io.WriteString(w, ending)
+		io.WriteString(w, ">\n")
+	}
+	if r.Icon != "" {
+		io.WriteString(w, "  <link rel=\"icon\" type=\"image/x-icon\" href=\"")
+		escapeHTML(w, []byte(r.Icon))
+		io.WriteString(w, "\"")
+		io.WriteString(w, ending)
+		io.WriteString(w, ">\n")
+	}
+	io.WriteString(w, "</head>\n")
+	io.WriteString(w, "<body>\n\n")
+}
+
+func (r *HTMLRenderer) writeTOC(w io.Writer, ast *Node) {
+	buf := bytes.Buffer{}
+
+	inHeading := false
+	tocLevel := 0
+	headingCount := 0
+
+	ast.Walk(func(node *Node, entering bool) WalkStatus {
+		if node.Type == Heading && !node.HeadingData.IsTitleblock {
+			inHeading = entering
+			if entering {
+				node.HeadingID = fmt.Sprintf("toc_%d", headingCount)
+				if node.Level == tocLevel {
+					buf.WriteString("</li>\n\n<li>")
+				} else if node.Level < tocLevel {
+					for node.Level < tocLevel {
+						tocLevel--
+						buf.WriteString("</li>\n</ul>")
+					}
+					buf.WriteString("</li>\n\n<li>")
+				} else {
+					for node.Level > tocLevel {
+						tocLevel++
+						buf.WriteString("\n<ul>\n<li>")
+					}
+				}
+
+				fmt.Fprintf(&buf, `<a href="#toc_%d">`, headingCount)
+				headingCount++
+			} else {
+				buf.WriteString("</a>")
+			}
+			return GoToNext
+		}
+
+		if inHeading {
+			return r.RenderNode(&buf, node, entering)
+		}
+
+		return GoToNext
+	})
+
+	for ; tocLevel > 0; tocLevel-- {
+		buf.WriteString("</li>\n</ul>")
+	}
+
+	if buf.Len() > 0 {
+		io.WriteString(w, "<nav>\n")
+		w.Write(buf.Bytes())
+		io.WriteString(w, "\n\n</nav>\n")
+	}
+	r.lastOutputLen = buf.Len()
+}

vendor/github.com/russross/blackfriday/v2/markdown.go

@@ -1,103 +1,93 @@
-//
 // Blackfriday Markdown Processor
 // Available at http://github.com/russross/blackfriday
 //
 // Copyright © 2011 Russ Ross <russ@russross.com>.
 // Distributed under the Simplified BSD License.
 // See README.md for details.
-//
-
-//
-//
-// Markdown parsing and processing
-//
-//
 
 package blackfriday
 
 import (
 	"bytes"
 	"fmt"
+	"io"
 	"strings"
 	"unicode/utf8"
 )
 
-const VERSION = "1.5"
+//
+// Markdown parsing and processing
+//
+
+// Version string of the package. Appears in the rendered document when
+// CompletePage flag is on.
+const Version = "2.0"
+
+// Extensions is a bitwise or'ed collection of enabled Blackfriday's
+// extensions.
+type Extensions int
 
 // These are the supported markdown parsing extensions.
 // OR these values together to select multiple extensions.
 const (
-	EXTENSION_NO_INTRA_EMPHASIS          = 1 << iota // ignore emphasis markers inside words
+	NoExtensions           Extensions = 0
-	EXTENSION_TABLES                                 // render tables
+	NoIntraEmphasis        Extensions = 1 << iota // Ignore emphasis markers inside words
-	EXTENSION_FENCED_CODE                            // render fenced code blocks
+	Tables                                        // Render tables
-	EXTENSION_AUTOLINK                               // detect embedded URLs that are not explicitly marked
+	FencedCode                                    // Render fenced code blocks
-	EXTENSION_STRIKETHROUGH                          // strikethrough text using ~~test~~
+	Autolink                                      // Detect embedded URLs that are not explicitly marked
-	EXTENSION_LAX_HTML_BLOCKS                        // loosen up HTML block parsing rules
+	Strikethrough                                 // Strikethrough text using ~~test~~
-	EXTENSION_SPACE_HEADERS                          // be strict about prefix header rules
+	LaxHTMLBlocks                                 // Loosen up HTML block parsing rules
-	EXTENSION_HARD_LINE_BREAK                        // translate newlines into line breaks
+	SpaceHeadings                                 // Be strict about prefix heading rules
-	EXTENSION_TAB_SIZE_EIGHT                         // expand tabs to eight spaces instead of four
+	HardLineBreak                                 // Translate newlines into line breaks
-	EXTENSION_FOOTNOTES                              // Pandoc-style footnotes
+	TabSizeEight                                  // Expand tabs to eight spaces instead of four
-	EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK             // No need to insert an empty line to start a (code, quote, ordered list, unordered list) block
+	Footnotes                                     // Pandoc-style footnotes
-	EXTENSION_HEADER_IDS                             // specify header IDs  with {#id}
+	NoEmptyLineBeforeBlock                        // No need to insert an empty line to start a (code, quote, ordered list, unordered list) block
-	EXTENSION_TITLEBLOCK                             // Titleblock ala pandoc
+	HeadingIDs                                    // specify heading IDs  with {#id}
-	EXTENSION_AUTO_HEADER_IDS                        // Create the header ID from the text
+	Titleblock                                    // Titleblock ala pandoc
-	EXTENSION_BACKSLASH_LINE_BREAK                   // translate trailing backslashes into line breaks
+	AutoHeadingIDs                                // Create the heading ID from the text
-	EXTENSION_DEFINITION_LISTS                       // render definition lists
+	BackslashLineBreak                            // Translate trailing backslashes into line breaks
-	EXTENSION_JOIN_LINES                             // delete newline and join lines
+	DefinitionLists                               // Render definition lists
 
-	commonHtmlFlags = 0 |
+	CommonHTMLFlags HTMLFlags = UseXHTML | Smartypants |
-		HTML_USE_XHTML |
+		SmartypantsFractions | SmartypantsDashes | SmartypantsLatexDashes
-		HTML_USE_SMARTYPANTS |
-		HTML_SMARTYPANTS_FRACTIONS |
-		HTML_SMARTYPANTS_DASHES |
-		HTML_SMARTYPANTS_LATEX_DASHES
 
-	commonExtensions = 0 |
+	CommonExtensions Extensions = NoIntraEmphasis | Tables | FencedCode |
-		EXTENSION_NO_INTRA_EMPHASIS |
+		Autolink | Strikethrough | SpaceHeadings | HeadingIDs |
-		EXTENSION_TABLES |
+		BackslashLineBreak | DefinitionLists
-		EXTENSION_FENCED_CODE |
-		EXTENSION_AUTOLINK |
-		EXTENSION_STRIKETHROUGH |
-		EXTENSION_SPACE_HEADERS |
-		EXTENSION_HEADER_IDS |
-		EXTENSION_BACKSLASH_LINE_BREAK |
-		EXTENSION_DEFINITION_LISTS
 )
 
-// These are the possible flag values for the link renderer.
+// ListType contains bitwise or'ed flags for list and list item objects.
-// Only a single one of these values will be used; they are not ORed together.
+type ListType int
-// These are mostly of interest if you are writing a new output format.
-const (
-	LINK_TYPE_NOT_AUTOLINK = iota
-	LINK_TYPE_NORMAL
-	LINK_TYPE_EMAIL
-)
 
 // These are the possible flag values for the ListItem renderer.
 // Multiple flag values may be ORed together.
 // These are mostly of interest if you are writing a new output format.
 const (
-	LIST_TYPE_ORDERED = 1 << iota
+	ListTypeOrdered ListType = 1 << iota
-	LIST_TYPE_DEFINITION
+	ListTypeDefinition
-	LIST_TYPE_TERM
+	ListTypeTerm
-	LIST_ITEM_CONTAINS_BLOCK
+
-	LIST_ITEM_BEGINNING_OF_LIST
+	ListItemContainsBlock
-	LIST_ITEM_END_OF_LIST
+	ListItemBeginningOfList // TODO: figure out if this is of any use now
+	ListItemEndOfList
 )
 
+// CellAlignFlags holds a type of alignment in a table cell.
+type CellAlignFlags int
+
 // These are the possible flag values for the table cell renderer.
 // Only a single one of these values will be used; they are not ORed together.
 // These are mostly of interest if you are writing a new output format.
 const (
-	TABLE_ALIGNMENT_LEFT = 1 << iota
+	TableAlignmentLeft CellAlignFlags = 1 << iota
-	TABLE_ALIGNMENT_RIGHT
+	TableAlignmentRight
-	TABLE_ALIGNMENT_CENTER = (TABLE_ALIGNMENT_LEFT | TABLE_ALIGNMENT_RIGHT)
+	TableAlignmentCenter = (TableAlignmentLeft | TableAlignmentRight)
 )
 
 // The size of a tab stop.
 const (
-	TAB_SIZE_DEFAULT = 4
+	TabSizeDefault = 4
-	TAB_SIZE_EIGHT   = 8
+	TabSizeDouble  = 8
 )
 
 // blockTags is a set of tags that are recognized as HTML block tags.
@@ -145,72 +135,47 @@ var blockTags = map[string]struct{}{
 	"video":      {},
 }
 
-// Renderer is the rendering interface.
+// Renderer is the rendering interface. This is mostly of interest if you are
-// This is mostly of interest if you are implementing a new rendering format.
+// implementing a new rendering format.
 //
-// When a byte slice is provided, it contains the (rendered) contents of the
+// Only an HTML implementation is provided in this repository, see the README
-// element.
+// for external implementations.
-//
-// When a callback is provided instead, it will write the contents of the
-// respective element directly to the output buffer and return true on success.
-// If the callback returns false, the rendering function should reset the
-// output buffer as though it had never been called.
-//
-// Currently Html and Latex implementations are provided
 type Renderer interface {
-	// block-level callbacks
+	// RenderNode is the main rendering method. It will be called once for
-	BlockCode(out *bytes.Buffer, text []byte, infoString string)
+	// every leaf node and twice for every non-leaf node (first with
-	BlockQuote(out *bytes.Buffer, text []byte)
+	// entering=true, then with entering=false). The method should write its
-	BlockHtml(out *bytes.Buffer, text []byte)
+	// rendition of the node to the supplied writer w.
-	Header(out *bytes.Buffer, text func() bool, level int, id string)
+	RenderNode(w io.Writer, node *Node, entering bool) WalkStatus
-	HRule(out *bytes.Buffer)
-	List(out *bytes.Buffer, text func() bool, flags int)
-	ListItem(out *bytes.Buffer, text []byte, flags int)
-	Paragraph(out *bytes.Buffer, text func() bool)
-	Table(out *bytes.Buffer, header []byte, body []byte, columnData []int)
-	TableRow(out *bytes.Buffer, text []byte)
-	TableHeaderCell(out *bytes.Buffer, text []byte, flags int)
-	TableCell(out *bytes.Buffer, text []byte, flags int)
-	Footnotes(out *bytes.Buffer, text func() bool)
-	FootnoteItem(out *bytes.Buffer, name, text []byte, flags int)
-	TitleBlock(out *bytes.Buffer, text []byte)
 
-	// Span-level callbacks
+	// RenderHeader is a method that allows the renderer to produce some
-	AutoLink(out *bytes.Buffer, link []byte, kind int)
+	// content preceding the main body of the output document. The header is
-	CodeSpan(out *bytes.Buffer, text []byte)
+	// understood in the broad sense here. For example, the default HTML
-	DoubleEmphasis(out *bytes.Buffer, text []byte)
+	// renderer will write not only the HTML document preamble, but also the
-	Emphasis(out *bytes.Buffer, text []byte)
+	// table of contents if it was requested.
-	Image(out *bytes.Buffer, link []byte, title []byte, alt []byte)
+	//
-	LineBreak(out *bytes.Buffer)
+	// The method will be passed an entire document tree, in case a particular
-	Link(out *bytes.Buffer, link []byte, title []byte, content []byte)
+	// implementation needs to inspect it to produce output.
-	RawHtmlTag(out *bytes.Buffer, tag []byte)
+	//
-	TripleEmphasis(out *bytes.Buffer, text []byte)
+	// The output should be written to the supplied writer w. If your
-	StrikeThrough(out *bytes.Buffer, text []byte)
+	// implementation has no header to write, supply an empty implementation.
-	FootnoteRef(out *bytes.Buffer, ref []byte, id int)
+	RenderHeader(w io.Writer, ast *Node)
 
-	// Low-level callbacks
+	// RenderFooter is a symmetric counterpart of RenderHeader.
-	Entity(out *bytes.Buffer, entity []byte)
+	RenderFooter(w io.Writer, ast *Node)
-	NormalText(out *bytes.Buffer, text []byte)
-
-	// Header and footer
-	DocumentHeader(out *bytes.Buffer)
-	DocumentFooter(out *bytes.Buffer)
-
-	GetFlags() int
 }
 
 // Callback functions for inline parsing. One such function is defined
 // for each character that triggers a response when parsing inline data.
-type inlineParser func(p *parser, out *bytes.Buffer, data []byte, offset int) int
+type inlineParser func(p *Markdown, data []byte, offset int) (int, *Node)
 
-// Parser holds runtime state used by the parser.
+// Markdown is a type that holds extensions and the runtime state used by
-// This is constructed by the Markdown function.
+// Parse, and the renderer. You can not use it directly, construct it with New.
-type parser struct {
+type Markdown struct {
-	r              Renderer
+	renderer          Renderer
-	refOverride    ReferenceOverrideFunc
+	referenceOverride ReferenceOverrideFunc
 	refs              map[string]*reference
 	inlineCallback    [256]inlineParser
-	flags          int
+	extensions        Extensions
 	nesting           int
 	maxNesting        int
 	insideLink        bool
@@ -219,12 +184,17 @@ type parser struct {
 	// presence. If a ref is also a footnote, it's stored both in refs and here
 	// in notes. Slice is nil if footnotes not enabled.
 	notes []*reference
-	notesRecord map[string]struct{}
+
+	doc                  *Node
+	tip                  *Node // = doc
+	oldTip               *Node
+	lastMatchedContainer *Node // = doc
+	allClosed            bool
 }
 
-func (p *parser) getRef(refid string) (ref *reference, found bool) {
+func (p *Markdown) getRef(refid string) (ref *reference, found bool) {
-	if p.refOverride != nil {
+	if p.referenceOverride != nil {
-		r, overridden := p.refOverride(refid)
+		r, overridden := p.referenceOverride(refid)
 		if overridden {
 			if r == nil {
 				return nil, false
@@ -232,7 +202,7 @@ func (p *parser) getRef(refid string) (ref *reference, found bool) {
 			return &reference{
 				link:     []byte(r.Link),
 				title:    []byte(r.Title),
-				noteId:   0,
+				noteID:   0,
 				hasBlock: false,
 				text:     []byte(r.Text)}, true
 		}
@@ -242,9 +212,34 @@ func (p *parser) getRef(refid string) (ref *reference, found bool) {
 	return ref, found
 }
 
-func (p *parser) isFootnote(ref *reference) bool {
+func (p *Markdown) finalize(block *Node) {
-	_, ok := p.notesRecord[string(ref.link)]
+	above := block.Parent
-	return ok
+	block.open = false
+	p.tip = above
+}
+
+func (p *Markdown) addChild(node NodeType, offset uint32) *Node {
+	return p.addExistingChild(NewNode(node), offset)
+}
+
+func (p *Markdown) addExistingChild(node *Node, offset uint32) *Node {
+	for !p.tip.canContain(node.Type) {
+		p.finalize(p.tip)
+	}
+	p.tip.AppendChild(node)
+	p.tip = node
+	return node
+}
+
+func (p *Markdown) closeUnmatchedBlocks() {
+	if !p.allClosed {
+		for p.oldTip != p.lastMatchedContainer {
+			parent := p.oldTip.Parent
+			p.finalize(p.oldTip)
+			p.oldTip = parent
+		}
+		p.allClosed = true
+	}
 }
 
 //
@@ -271,102 +266,27 @@ type Reference struct {
 // See the documentation in Options for more details on use-case.
 type ReferenceOverrideFunc func(reference string) (ref *Reference, overridden bool)
 
-// Options represents configurable overrides and callbacks (in addition to the
+// New constructs a Markdown processor. You can use the same With* functions as
-// extension flag set) for configuring a Markdown parse.
+// for Run() to customize parser's behavior and the renderer.
-type Options struct {
+func New(opts ...Option) *Markdown {
-	// Extensions is a flag set of bit-wise ORed extension bits. See the
+	var p Markdown
-	// EXTENSION_* flags defined in this package.
+	for _, opt := range opts {
-	Extensions int
+		opt(&p)
-
-	// ReferenceOverride is an optional function callback that is called every
-	// time a reference is resolved.
-	//
-	// In Markdown, the link reference syntax can be made to resolve a link to
-	// a reference instead of an inline URL, in one of the following ways:
-	//
-	//  * [link text][refid]
-	//  * [refid][]
-	//
-	// Usually, the refid is defined at the bottom of the Markdown document. If
-	// this override function is provided, the refid is passed to the override
-	// function first, before consulting the defined refids at the bottom. If
-	// the override function indicates an override did not occur, the refids at
-	// the bottom will be used to fill in the link details.
-	ReferenceOverride ReferenceOverrideFunc
-}
-
-// MarkdownBasic is a convenience function for simple rendering.
-// It processes markdown input with no extensions enabled.
-func MarkdownBasic(input []byte) []byte {
-	// set up the HTML renderer
-	htmlFlags := HTML_USE_XHTML
-	renderer := HtmlRenderer(htmlFlags, "", "")
-
-	// set up the parser
-	return MarkdownOptions(input, renderer, Options{Extensions: 0})
-}
-
-// Call Markdown with most useful extensions enabled
-// MarkdownCommon is a convenience function for simple rendering.
-// It processes markdown input with common extensions enabled, including:
-//
-// * Smartypants processing with smart fractions and LaTeX dashes
-//
-// * Intra-word emphasis suppression
-//
-// * Tables
-//
-// * Fenced code blocks
-//
-// * Autolinking
-//
-// * Strikethrough support
-//
-// * Strict header parsing
-//
-// * Custom Header IDs
-func MarkdownCommon(input []byte) []byte {
-	// set up the HTML renderer
-	renderer := HtmlRenderer(commonHtmlFlags, "", "")
-	return MarkdownOptions(input, renderer, Options{
-		Extensions: commonExtensions})
-}
-
-// Markdown is the main rendering function.
-// It parses and renders a block of markdown-encoded text.
-// The supplied Renderer is used to format the output, and extensions dictates
-// which non-standard extensions are enabled.
-//
-// To use the supplied Html or LaTeX renderers, see HtmlRenderer and
-// LatexRenderer, respectively.
-func Markdown(input []byte, renderer Renderer, extensions int) []byte {
-	return MarkdownOptions(input, renderer, Options{
-		Extensions: extensions})
-}
-
-// MarkdownOptions is just like Markdown but takes additional options through
-// the Options struct.
-func MarkdownOptions(input []byte, renderer Renderer, opts Options) []byte {
-	// no point in parsing if we can't render
-	if renderer == nil {
-		return nil
 	}
-
-	extensions := opts.Extensions
-
-	// fill in the render structure
-	p := new(parser)
-	p.r = renderer
-	p.flags = extensions
-	p.refOverride = opts.ReferenceOverride
 	p.refs = make(map[string]*reference)
 	p.maxNesting = 16
 	p.insideLink = false
-
+	docNode := NewNode(Document)
+	p.doc = docNode
+	p.tip = docNode
+	p.oldTip = docNode
+	p.lastMatchedContainer = docNode
+	p.allClosed = true
 	// register inline parsers
+	p.inlineCallback[' '] = maybeLineBreak
 	p.inlineCallback['*'] = emphasis
 	p.inlineCallback['_'] = emphasis
-	if extensions&EXTENSION_STRIKETHROUGH != 0 {
+	if p.extensions&Strikethrough != 0 {
 		p.inlineCallback['~'] = emphasis
 	}
 	p.inlineCallback['`'] = codeSpan
@@ -375,116 +295,166 @@ func MarkdownOptions(input []byte, renderer Renderer, opts Options) []byte {
 	p.inlineCallback['<'] = leftAngle
 	p.inlineCallback['\\'] = escape
 	p.inlineCallback['&'] = entity
-
+	p.inlineCallback['!'] = maybeImage
-	if extensions&EXTENSION_AUTOLINK != 0 {
+	p.inlineCallback['^'] = maybeInlineFootnote
-		p.inlineCallback[':'] = autoLink
+	if p.extensions&Autolink != 0 {
+		p.inlineCallback['h'] = maybeAutoLink
+		p.inlineCallback['m'] = maybeAutoLink
+		p.inlineCallback['f'] = maybeAutoLink
+		p.inlineCallback['H'] = maybeAutoLink
+		p.inlineCallback['M'] = maybeAutoLink
+		p.inlineCallback['F'] = maybeAutoLink
 	}
-
+	if p.extensions&Footnotes != 0 {
-	if extensions&EXTENSION_FOOTNOTES != 0 {
 		p.notes = make([]*reference, 0)
-		p.notesRecord = make(map[string]struct{})
 	}
-
+	return &p
-	first := firstPass(p, input)
-	second := secondPass(p, first)
-	return second
 }
 
-// first pass:
+// Option customizes the Markdown processor's default behavior.
-// - normalize newlines
+type Option func(*Markdown)
-// - extract references (outside of fenced code blocks)
-// - expand tabs (outside of fenced code blocks)
-// - copy everything else
-func firstPass(p *parser, input []byte) []byte {
-	var out bytes.Buffer
-	tabSize := TAB_SIZE_DEFAULT
-	if p.flags&EXTENSION_TAB_SIZE_EIGHT != 0 {
-		tabSize = TAB_SIZE_EIGHT
-	}
-	beg := 0
-	lastFencedCodeBlockEnd := 0
-	for beg < len(input) {
-		// Find end of this line, then process the line.
-		end := beg
-		for end < len(input) && input[end] != '\n' && input[end] != '\r' {
-			end++
-		}
 
-		if p.flags&EXTENSION_FENCED_CODE != 0 {
+// WithRenderer allows you to override the default renderer.
-			// track fenced code block boundaries to suppress tab expansion
+func WithRenderer(r Renderer) Option {
-			// and reference extraction inside them:
+	return func(p *Markdown) {
-			if beg >= lastFencedCodeBlockEnd {
+		p.renderer = r
-				if i := p.fencedCodeBlock(&out, input[beg:], false); i > 0 {
-					lastFencedCodeBlockEnd = beg + i
 	}
-			}
-		}
-
-		// add the line body if present
-		if end > beg {
-			if end < lastFencedCodeBlockEnd { // Do not expand tabs while inside fenced code blocks.
-				out.Write(input[beg:end])
-			} else if refEnd := isReference(p, input[beg:], tabSize); refEnd > 0 {
-				beg += refEnd
-				continue
-			} else {
-				expandTabs(&out, input[beg:end], tabSize)
-			}
-		}
-
-		if end < len(input) && input[end] == '\r' {
-			end++
-		}
-		if end < len(input) && input[end] == '\n' {
-			end++
-		}
-		out.WriteByte('\n')
-
-		beg = end
-	}
-
-	// empty input?
-	if out.Len() == 0 {
-		out.WriteByte('\n')
-	}
-
-	return out.Bytes()
 }
 
-// second pass: actual rendering
+// WithExtensions allows you to pick some of the many extensions provided by
-func secondPass(p *parser, input []byte) []byte {
+// Blackfriday. You can bitwise OR them.
-	var output bytes.Buffer
+func WithExtensions(e Extensions) Option {
-
+	return func(p *Markdown) {
-	p.r.DocumentHeader(&output)
+		p.extensions = e
-	p.block(&output, input)
-
-	if p.flags&EXTENSION_FOOTNOTES != 0 && len(p.notes) > 0 {
-		p.r.Footnotes(&output, func() bool {
-			flags := LIST_ITEM_BEGINNING_OF_LIST
-			for i := 0; i < len(p.notes); i += 1 {
-				ref := p.notes[i]
-				var buf bytes.Buffer
-				if ref.hasBlock {
-					flags |= LIST_ITEM_CONTAINS_BLOCK
-					p.block(&buf, ref.title)
-				} else {
-					p.inline(&buf, ref.title)
-				}
-				p.r.FootnoteItem(&output, ref.link, buf.Bytes(), flags)
-				flags &^= LIST_ITEM_BEGINNING_OF_LIST | LIST_ITEM_CONTAINS_BLOCK
 	}
+}
 
-			return true
+// WithNoExtensions turns off all extensions and custom behavior.
+func WithNoExtensions() Option {
+	return func(p *Markdown) {
+		p.extensions = NoExtensions
+		p.renderer = NewHTMLRenderer(HTMLRendererParameters{
+			Flags: HTMLFlagsNone,
 		})
 	}
+}
 
-	p.r.DocumentFooter(&output)
+// WithRefOverride sets an optional function callback that is called every
-
+// time a reference is resolved.
-	if p.nesting != 0 {
+//
-		panic("Nesting level did not end at zero")
+// In Markdown, the link reference syntax can be made to resolve a link to
+// a reference instead of an inline URL, in one of the following ways:
+//
+//  * [link text][refid]
+//  * [refid][]
+//
+// Usually, the refid is defined at the bottom of the Markdown document. If
+// this override function is provided, the refid is passed to the override
+// function first, before consulting the defined refids at the bottom. If
+// the override function indicates an override did not occur, the refids at
+// the bottom will be used to fill in the link details.
+func WithRefOverride(o ReferenceOverrideFunc) Option {
+	return func(p *Markdown) {
+		p.referenceOverride = o
 	}
+}
 
-	return output.Bytes()
+// Run is the main entry point to Blackfriday. It parses and renders a
+// block of markdown-encoded text.
+//
+// The simplest invocation of Run takes one argument, input:
+//     output := Run(input)
+// This will parse the input with CommonExtensions enabled and render it with
+// the default HTMLRenderer (with CommonHTMLFlags).
+//
+// Variadic arguments opts can customize the default behavior. Since Markdown
+// type does not contain exported fields, you can not use it directly. Instead,
+// use the With* functions. For example, this will call the most basic
+// functionality, with no extensions:
+//     output := Run(input, WithNoExtensions())
+//
+// You can use any number of With* arguments, even contradicting ones. They
+// will be applied in order of appearance and the latter will override the
+// former:
+//     output := Run(input, WithNoExtensions(), WithExtensions(exts),
+//         WithRenderer(yourRenderer))
+func Run(input []byte, opts ...Option) []byte {
+	r := NewHTMLRenderer(HTMLRendererParameters{
+		Flags: CommonHTMLFlags,
+	})
+	optList := []Option{WithRenderer(r), WithExtensions(CommonExtensions)}
+	optList = append(optList, opts...)
+	parser := New(optList...)
+	ast := parser.Parse(input)
+	var buf bytes.Buffer
+	parser.renderer.RenderHeader(&buf, ast)
+	ast.Walk(func(node *Node, entering bool) WalkStatus {
+		return parser.renderer.RenderNode(&buf, node, entering)
+	})
+	parser.renderer.RenderFooter(&buf, ast)
+	return buf.Bytes()
+}
+
+// Parse is an entry point to the parsing part of Blackfriday. It takes an
+// input markdown document and produces a syntax tree for its contents. This
+// tree can then be rendered with a default or custom renderer, or
+// analyzed/transformed by the caller to whatever non-standard needs they have.
+// The return value is the root node of the syntax tree.
+func (p *Markdown) Parse(input []byte) *Node {
+	p.block(input)
+	// Walk the tree and finish up some of unfinished blocks
+	for p.tip != nil {
+		p.finalize(p.tip)
+	}
+	// Walk the tree again and process inline markdown in each block
+	p.doc.Walk(func(node *Node, entering bool) WalkStatus {
+		if node.Type == Paragraph || node.Type == Heading || node.Type == TableCell {
+			p.inline(node, node.content)
+			node.content = nil
+		}
+		return GoToNext
+	})
+	p.parseRefsToAST()
+	return p.doc
+}
+
+func (p *Markdown) parseRefsToAST() {
+	if p.extensions&Footnotes == 0 || len(p.notes) == 0 {
+		return
+	}
+	p.tip = p.doc
+	block := p.addBlock(List, nil)
+	block.IsFootnotesList = true
+	block.ListFlags = ListTypeOrdered
+	flags := ListItemBeginningOfList
+	// Note: this loop is intentionally explicit, not range-form. This is
+	// because the body of the loop will append nested footnotes to p.notes and
+	// we need to process those late additions. Range form would only walk over
+	// the fixed initial set.
+	for i := 0; i < len(p.notes); i++ {
+		ref := p.notes[i]
+		p.addExistingChild(ref.footnote, 0)
+		block := ref.footnote
+		block.ListFlags = flags | ListTypeOrdered
+		block.RefLink = ref.link
+		if ref.hasBlock {
+			flags |= ListItemContainsBlock
+			p.block(ref.title)
+		} else {
+			p.inline(block, ref.title)
+		}
+		flags &^= ListItemBeginningOfList | ListItemContainsBlock
+	}
+	above := block.Parent
+	finalizeList(block)
+	p.tip = above
+	block.Walk(func(node *Node, entering bool) WalkStatus {
+		if node.Type == Paragraph || node.Type == Heading {
+			p.inline(node, node.content)
+			node.content = nil
+		}
+		return GoToNext
+	})
 }
 
 //
@@ -510,24 +480,62 @@ func secondPass(p *parser, input []byte) []byte {
 //    [^note]: This is the explanation.
 //
 // Footnotes should be placed at the end of the document in an ordered list.
-// Inline footnotes such as:
+// Finally, there are inline footnotes such as:
 //
-//    Inline footnotes^[Not supported.] also exist.
+//    Inline footnotes^[Also supported.] provide a quick inline explanation,
+//    but are rendered at the bottom of the document.
 //
-// are not yet supported.
 
-// References are parsed and stored in this struct.
+// reference holds all information necessary for a reference-style links or
+// footnotes.
+//
+// Consider this markdown with reference-style links:
+//
+//     [link][ref]
+//
+//     [ref]: /url/ "tooltip title"
+//
+// It will be ultimately converted to this HTML:
+//
+//     <p><a href=\"/url/\" title=\"title\">link</a></p>
+//
+// And a reference structure will be populated as follows:
+//
+//     p.refs["ref"] = &reference{
+//         link: "/url/",
+//         title: "tooltip title",
+//     }
+//
+// Alternatively, reference can contain information about a footnote. Consider
+// this markdown:
+//
+//     Text needing a footnote.[^a]
+//
+//     [^a]: This is the note
+//
+// A reference structure will be populated as follows:
+//
+//     p.refs["a"] = &reference{
+//         link: "a",
+//         title: "This is the note",
+//         noteID: <some positive int>,
+//     }
+//
+// TODO: As you can see, it begs for splitting into two dedicated structures
+// for refs and for footnotes.
 type reference struct {
 	link     []byte
 	title    []byte
-	noteId   int // 0 if not a footnote ref
+	noteID   int // 0 if not a footnote ref
 	hasBlock bool
-	text     []byte
+	footnote *Node // a link to the Item node within a list of footnotes
+
+	text []byte // only gets populated by refOverride feature with Reference.Text
 }
 
 func (r *reference) String() string {
-	return fmt.Sprintf("{link: %q, title: %q, text: %q, noteId: %d, hasBlock: %v}",
+	return fmt.Sprintf("{link: %q, title: %q, text: %q, noteID: %d, hasBlock: %v}",
-		r.link, r.title, r.text, r.noteId, r.hasBlock)
+		r.link, r.title, r.text, r.noteID, r.hasBlock)
 }
 
 // Check whether or not data starts with a reference link.
@@ -535,7 +543,7 @@ func (r *reference) String() string {
 // (in the render struct).
 // Returns the number of bytes to skip to move past it,
 // or zero if the first line is not a reference.
-func isReference(p *parser, data []byte, tabSize int) int {
+func isReference(p *Markdown, data []byte, tabSize int) int {
 	// up to 3 optional leading spaces
 	if len(data) < 4 {
 		return 0
@@ -545,18 +553,18 @@ func isReference(p *parser, data []byte, tabSize int) int {
 		i++
 	}
 
-	noteId := 0
+	noteID := 0
 
 	// id part: anything but a newline between brackets
 	if data[i] != '[' {
 		return 0
 	}
 	i++
-	if p.flags&EXTENSION_FOOTNOTES != 0 {
+	if p.extensions&Footnotes != 0 {
 		if i < len(data) && data[i] == '^' {
 			// we can set it to anything here because the proper noteIds will
 			// be assigned later during the second pass. It just has to be != 0
-			noteId = 1
+			noteID = 1
 			i++
 		}
 	}
@@ -568,7 +576,11 @@ func isReference(p *parser, data []byte, tabSize int) int {
 		return 0
 	}
 	idEnd := i
-
+	// footnotes can have empty ID, like this: [^], but a reference can not be
+	// empty like this: []. Break early if it's not a footnote and there's no ID
+	if noteID == 0 && idOffset == idEnd {
+		return 0
+	}
 	// spacer: colon (space | tab)* newline? (space | tab)*
 	i++
 	if i >= len(data) || data[i] != ':' {
@@ -599,7 +611,7 @@ func isReference(p *parser, data []byte, tabSize int) int {
 		hasBlock              bool
 	)
 
-	if p.flags&EXTENSION_FOOTNOTES != 0 && noteId != 0 {
+	if p.extensions&Footnotes != 0 && noteID != 0 {
 		linkOffset, linkEnd, raw, hasBlock = scanFootnote(p, data, i, tabSize)
 		lineEnd = linkEnd
 	} else {
@@ -612,11 +624,11 @@ func isReference(p *parser, data []byte, tabSize int) int {
 	// a valid ref has been found
 
 	ref := &reference{
-		noteId:   noteId,
+		noteID:   noteID,
 		hasBlock: hasBlock,
 	}
 
-	if noteId > 0 {
+	if noteID > 0 {
 		// reusing the link field for the id since footnotes don't have links
 		ref.link = data[idOffset:idEnd]
 		// if footnote, it's not really a title, it's the contained text
@@ -634,15 +646,12 @@ func isReference(p *parser, data []byte, tabSize int) int {
 	return lineEnd
 }
 
-func scanLinkRef(p *parser, data []byte, i int) (linkOffset, linkEnd, titleOffset, titleEnd, lineEnd int) {
+func scanLinkRef(p *Markdown, data []byte, i int) (linkOffset, linkEnd, titleOffset, titleEnd, lineEnd int) {
 	// link: whitespace-free sequence, optionally between angle brackets
 	if data[i] == '<' {
 		i++
 	}
 	linkOffset = i
-	if i == len(data) {
-		return
-	}
 	for i < len(data) && data[i] != ' ' && data[i] != '\t' && data[i] != '\n' && data[i] != '\r' {
 		i++
 	}
@@ -705,13 +714,13 @@ func scanLinkRef(p *parser, data []byte, i int) (linkOffset, linkEnd, titleOffse
 	return
 }
 
-// The first bit of this logic is the same as (*parser).listItem, but the rest
+// The first bit of this logic is the same as Parser.listItem, but the rest
 // is much simpler. This function simply finds the entire block and shifts it
 // over by one tab if it is indeed a block (just returns the line if it's not).
 // blockEnd is the end of the section in the input buffer, and contents is the
 // extracted text that was shifted over one tab. It will need to be rendered at
 // the end of the document.
-func scanFootnote(p *parser, data []byte, i, indentSize int) (blockStart, blockEnd int, contents []byte, hasBlock bool) {
+func scanFootnote(p *Markdown, data []byte, i, indentSize int) (blockStart, blockEnd int, contents []byte, hasBlock bool) {
 	if i == 0 || len(data) == 0 {
 		return
 	}
@@ -812,7 +821,7 @@ func ishorizontalspace(c byte) bool {
 	return c == ' ' || c == '\t'
 }
 
-// Test if a character is a vertical whitespace character.
+// Test if a character is a vertical character.
 func isverticalspace(c byte) bool {
 	return c == '\n' || c == '\r' || c == '\f' || c == '\v'
 }

vendor/github.com/russross/blackfriday/v2/node.go

@@ -0,0 +1,354 @@
+package blackfriday
+
+import (
+	"bytes"
+	"fmt"
+)
+
+// NodeType specifies a type of a single node of a syntax tree. Usually one
+// node (and its type) corresponds to a single markdown feature, e.g. emphasis
+// or code block.
+type NodeType int
+
+// Constants for identifying different types of nodes. See NodeType.
+const (
+	Document NodeType = iota
+	BlockQuote
+	List
+	Item
+	Paragraph
+	Heading
+	HorizontalRule
+	Emph
+	Strong
+	Del
+	Link
+	Image
+	Text
+	HTMLBlock
+	CodeBlock
+	Softbreak
+	Hardbreak
+	Code
+	HTMLSpan
+	Table
+	TableCell
+	TableHead
+	TableBody
+	TableRow
+)
+
+var nodeTypeNames = []string{
+	Document:       "Document",
+	BlockQuote:     "BlockQuote",
+	List:           "List",
+	Item:           "Item",
+	Paragraph:      "Paragraph",
+	Heading:        "Heading",
+	HorizontalRule: "HorizontalRule",
+	Emph:           "Emph",
+	Strong:         "Strong",
+	Del:            "Del",
+	Link:           "Link",
+	Image:          "Image",
+	Text:           "Text",
+	HTMLBlock:      "HTMLBlock",
+	CodeBlock:      "CodeBlock",
+	Softbreak:      "Softbreak",
+	Hardbreak:      "Hardbreak",
+	Code:           "Code",
+	HTMLSpan:       "HTMLSpan",
+	Table:          "Table",
+	TableCell:      "TableCell",
+	TableHead:      "TableHead",
+	TableBody:      "TableBody",
+	TableRow:       "TableRow",
+}
+
+func (t NodeType) String() string {
+	return nodeTypeNames[t]
+}
+
+// ListData contains fields relevant to a List and Item node type.
+type ListData struct {
+	ListFlags       ListType
+	Tight           bool   // Skip <p>s around list item data if true
+	BulletChar      byte   // '*', '+' or '-' in bullet lists
+	Delimiter       byte   // '.' or ')' after the number in ordered lists
+	RefLink         []byte // If not nil, turns this list item into a footnote item and triggers different rendering
+	IsFootnotesList bool   // This is a list of footnotes
+}
+
+// LinkData contains fields relevant to a Link node type.
+type LinkData struct {
+	Destination []byte // Destination is what goes into a href
+	Title       []byte // Title is the tooltip thing that goes in a title attribute
+	NoteID      int    // NoteID contains a serial number of a footnote, zero if it's not a footnote
+	Footnote    *Node  // If it's a footnote, this is a direct link to the footnote Node. Otherwise nil.
+}
+
+// CodeBlockData contains fields relevant to a CodeBlock node type.
+type CodeBlockData struct {
+	IsFenced    bool   // Specifies whether it's a fenced code block or an indented one
+	Info        []byte // This holds the info string
+	FenceChar   byte
+	FenceLength int
+	FenceOffset int
+}
+
+// TableCellData contains fields relevant to a TableCell node type.
+type TableCellData struct {
+	IsHeader bool           // This tells if it's under the header row
+	Align    CellAlignFlags // This holds the value for align attribute
+}
+
+// HeadingData contains fields relevant to a Heading node type.
+type HeadingData struct {
+	Level        int    // This holds the heading level number
+	HeadingID    string // This might hold heading ID, if present
+	IsTitleblock bool   // Specifies whether it's a title block
+}
+
+// Node is a single element in the abstract syntax tree of the parsed document.
+// It holds connections to the structurally neighboring nodes and, for certain
+// types of nodes, additional information that might be needed when rendering.
+type Node struct {
+	Type       NodeType // Determines the type of the node
+	Parent     *Node    // Points to the parent
+	FirstChild *Node    // Points to the first child, if any
+	LastChild  *Node    // Points to the last child, if any
+	Prev       *Node    // Previous sibling; nil if it's the first child
+	Next       *Node    // Next sibling; nil if it's the last child
+
+	Literal []byte // Text contents of the leaf nodes
+
+	HeadingData   // Populated if Type is Heading
+	ListData      // Populated if Type is List
+	CodeBlockData // Populated if Type is CodeBlock
+	LinkData      // Populated if Type is Link
+	TableCellData // Populated if Type is TableCell
+
+	content []byte // Markdown content of the block nodes
+	open    bool   // Specifies an open block node that has not been finished to process yet
+}
+
+// NewNode allocates a node of a specified type.
+func NewNode(typ NodeType) *Node {
+	return &Node{
+		Type: typ,
+		open: true,
+	}
+}
+
+func (n *Node) String() string {
+	ellipsis := ""
+	snippet := n.Literal
+	if len(snippet) > 16 {
+		snippet = snippet[:16]
+		ellipsis = "..."
+	}
+	return fmt.Sprintf("%s: '%s%s'", n.Type, snippet, ellipsis)
+}
+
+// Unlink removes node 'n' from the tree.
+// It panics if the node is nil.
+func (n *Node) Unlink() {
+	if n.Prev != nil {
+		n.Prev.Next = n.Next
+	} else if n.Parent != nil {
+		n.Parent.FirstChild = n.Next
+	}
+	if n.Next != nil {
+		n.Next.Prev = n.Prev
+	} else if n.Parent != nil {
+		n.Parent.LastChild = n.Prev
+	}
+	n.Parent = nil
+	n.Next = nil
+	n.Prev = nil
+}
+
+// AppendChild adds a node 'child' as a child of 'n'.
+// It panics if either node is nil.
+func (n *Node) AppendChild(child *Node) {
+	child.Unlink()
+	child.Parent = n
+	if n.LastChild != nil {
+		n.LastChild.Next = child
+		child.Prev = n.LastChild
+		n.LastChild = child
+	} else {
+		n.FirstChild = child
+		n.LastChild = child
+	}
+}
+
+// InsertBefore inserts 'sibling' immediately before 'n'.
+// It panics if either node is nil.
+func (n *Node) InsertBefore(sibling *Node) {
+	sibling.Unlink()
+	sibling.Prev = n.Prev
+	if sibling.Prev != nil {
+		sibling.Prev.Next = sibling
+	}
+	sibling.Next = n
+	n.Prev = sibling
+	sibling.Parent = n.Parent
+	if sibling.Prev == nil {
+		sibling.Parent.FirstChild = sibling
+	}
+}
+
+func (n *Node) isContainer() bool {
+	switch n.Type {
+	case Document:
+		fallthrough
+	case BlockQuote:
+		fallthrough
+	case List:
+		fallthrough
+	case Item:
+		fallthrough
+	case Paragraph:
+		fallthrough
+	case Heading:
+		fallthrough
+	case Emph:
+		fallthrough
+	case Strong:
+		fallthrough
+	case Del:
+		fallthrough
+	case Link:
+		fallthrough
+	case Image:
+		fallthrough
+	case Table:
+		fallthrough
+	case TableHead:
+		fallthrough
+	case TableBody:
+		fallthrough
+	case TableRow:
+		fallthrough
+	case TableCell:
+		return true
+	default:
+		return false
+	}
+}
+
+func (n *Node) canContain(t NodeType) bool {
+	if n.Type == List {
+		return t == Item
+	}
+	if n.Type == Document || n.Type == BlockQuote || n.Type == Item {
+		return t != Item
+	}
+	if n.Type == Table {
+		return t == TableHead || t == TableBody
+	}
+	if n.Type == TableHead || n.Type == TableBody {
+		return t == TableRow
+	}
+	if n.Type == TableRow {
+		return t == TableCell
+	}
+	return false
+}
+
+// WalkStatus allows NodeVisitor to have some control over the tree traversal.
+// It is returned from NodeVisitor and different values allow Node.Walk to
+// decide which node to go to next.
+type WalkStatus int
+
+const (
+	// GoToNext is the default traversal of every node.
+	GoToNext WalkStatus = iota
+	// SkipChildren tells walker to skip all children of current node.
+	SkipChildren
+	// Terminate tells walker to terminate the traversal.
+	Terminate
+)
+
+// NodeVisitor is a callback to be called when traversing the syntax tree.
+// Called twice for every node: once with entering=true when the branch is
+// first visited, then with entering=false after all the children are done.
+type NodeVisitor func(node *Node, entering bool) WalkStatus
+
+// Walk is a convenience method that instantiates a walker and starts a
+// traversal of subtree rooted at n.
+func (n *Node) Walk(visitor NodeVisitor) {
+	w := newNodeWalker(n)
+	for w.current != nil {
+		status := visitor(w.current, w.entering)
+		switch status {
+		case GoToNext:
+			w.next()
+		case SkipChildren:
+			w.entering = false
+			w.next()
+		case Terminate:
+			return
+		}
+	}
+}
+
+type nodeWalker struct {
+	current  *Node
+	root     *Node
+	entering bool
+}
+
+func newNodeWalker(root *Node) *nodeWalker {
+	return &nodeWalker{
+		current:  root,
+		root:     root,
+		entering: true,
+	}
+}
+
+func (nw *nodeWalker) next() {
+	if (!nw.current.isContainer() || !nw.entering) && nw.current == nw.root {
+		nw.current = nil
+		return
+	}
+	if nw.entering && nw.current.isContainer() {
+		if nw.current.FirstChild != nil {
+			nw.current = nw.current.FirstChild
+			nw.entering = true
+		} else {
+			nw.entering = false
+		}
+	} else if nw.current.Next == nil {
+		nw.current = nw.current.Parent
+		nw.entering = false
+	} else {
+		nw.current = nw.current.Next
+		nw.entering = true
+	}
+}
+
+func dump(ast *Node) {
+	fmt.Println(dumpString(ast))
+}
+
+func dumpR(ast *Node, depth int) string {
+	if ast == nil {
+		return ""
+	}
+	indent := bytes.Repeat([]byte("\t"), depth)
+	content := ast.Literal
+	if content == nil {
+		content = ast.content
+	}
+	result := fmt.Sprintf("%s%s(%q)\n", indent, ast.Type, content)
+	for n := ast.FirstChild; n != nil; n = n.Next {
+		result += dumpR(n, depth+1)
+	}
+	return result
+}
+
+func dumpString(ast *Node) string {
+	return dumpR(ast, 0)
+}

vendor/github.com/russross/blackfriday/v2/smartypants.go

@@ -17,11 +17,14 @@ package blackfriday
 
 import (
 	"bytes"
+	"io"
 )
 
-type smartypantsData struct {
+// SPRenderer is a struct containing state of a Smartypants renderer.
+type SPRenderer struct {
 	inSingleQuote bool
 	inDoubleQuote bool
+	callbacks     [256]smartCallback
 }
 
 func wordBoundary(c byte) bool {
@@ -118,7 +121,7 @@ func smartQuoteHelper(out *bytes.Buffer, previousChar byte, nextChar byte, quote
 	return true
 }
 
-func smartSingleQuote(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
+func (r *SPRenderer) smartSingleQuote(out *bytes.Buffer, previousChar byte, text []byte) int {
 	if len(text) >= 2 {
 		t1 := tolower(text[1])
 
@@ -127,7 +130,7 @@ func smartSingleQuote(out *bytes.Buffer, smrt *smartypantsData, previousChar byt
 			if len(text) >= 3 {
 				nextChar = text[2]
 			}
-			if smartQuoteHelper(out, previousChar, nextChar, 'd', &smrt.inDoubleQuote, false) {
+			if smartQuoteHelper(out, previousChar, nextChar, 'd', &r.inDoubleQuote, false) {
 				return 1
 			}
 		}
@@ -152,7 +155,7 @@ func smartSingleQuote(out *bytes.Buffer, smrt *smartypantsData, previousChar byt
 	if len(text) > 1 {
 		nextChar = text[1]
 	}
-	if smartQuoteHelper(out, previousChar, nextChar, 's', &smrt.inSingleQuote, false) {
+	if smartQuoteHelper(out, previousChar, nextChar, 's', &r.inSingleQuote, false) {
 		return 0
 	}
 
@@ -160,7 +163,7 @@ func smartSingleQuote(out *bytes.Buffer, smrt *smartypantsData, previousChar byt
 	return 0
 }
 
-func smartParens(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
+func (r *SPRenderer) smartParens(out *bytes.Buffer, previousChar byte, text []byte) int {
 	if len(text) >= 3 {
 		t1 := tolower(text[1])
 		t2 := tolower(text[2])
@@ -185,7 +188,7 @@ func smartParens(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, te
 	return 0
 }
 
-func smartDash(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
+func (r *SPRenderer) smartDash(out *bytes.Buffer, previousChar byte, text []byte) int {
 	if len(text) >= 2 {
 		if text[1] == '-' {
 			out.WriteString("—")
@@ -202,7 +205,7 @@ func smartDash(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text
 	return 0
 }
 
-func smartDashLatex(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
+func (r *SPRenderer) smartDashLatex(out *bytes.Buffer, previousChar byte, text []byte) int {
 	if len(text) >= 3 && text[1] == '-' && text[2] == '-' {
 		out.WriteString("—")
 		return 2
@@ -216,13 +219,13 @@ func smartDashLatex(out *bytes.Buffer, smrt *smartypantsData, previousChar byte,
 	return 0
 }
 
-func smartAmpVariant(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte, quote byte, addNBSP bool) int {
+func (r *SPRenderer) smartAmpVariant(out *bytes.Buffer, previousChar byte, text []byte, quote byte, addNBSP bool) int {
 	if bytes.HasPrefix(text, []byte(""")) {
 		nextChar := byte(0)
 		if len(text) >= 7 {
 			nextChar = text[6]
 		}
-		if smartQuoteHelper(out, previousChar, nextChar, quote, &smrt.inDoubleQuote, addNBSP) {
+		if smartQuoteHelper(out, previousChar, nextChar, quote, &r.inDoubleQuote, addNBSP) {
 			return 5
 		}
 	}
@@ -235,18 +238,18 @@ func smartAmpVariant(out *bytes.Buffer, smrt *smartypantsData, previousChar byte
 	return 0
 }
 
-func smartAmp(angledQuotes, addNBSP bool) func(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
+func (r *SPRenderer) smartAmp(angledQuotes, addNBSP bool) func(*bytes.Buffer, byte, []byte) int {
 	var quote byte = 'd'
 	if angledQuotes {
 		quote = 'a'
 	}
 
-	return func(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
+	return func(out *bytes.Buffer, previousChar byte, text []byte) int {
-		return smartAmpVariant(out, smrt, previousChar, text, quote, addNBSP)
+		return r.smartAmpVariant(out, previousChar, text, quote, addNBSP)
 	}
 }
 
-func smartPeriod(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
+func (r *SPRenderer) smartPeriod(out *bytes.Buffer, previousChar byte, text []byte) int {
 	if len(text) >= 3 && text[1] == '.' && text[2] == '.' {
 		out.WriteString("…")
 		return 2
@@ -261,13 +264,13 @@ func smartPeriod(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, te
 	return 0
 }
 
-func smartBacktick(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
+func (r *SPRenderer) smartBacktick(out *bytes.Buffer, previousChar byte, text []byte) int {
 	if len(text) >= 2 && text[1] == '`' {
 		nextChar := byte(0)
 		if len(text) >= 3 {
 			nextChar = text[2]
 		}
-		if smartQuoteHelper(out, previousChar, nextChar, 'd', &smrt.inDoubleQuote, false) {
+		if smartQuoteHelper(out, previousChar, nextChar, 'd', &r.inDoubleQuote, false) {
 			return 1
 		}
 	}
@@ -276,7 +279,7 @@ func smartBacktick(out *bytes.Buffer, smrt *smartypantsData, previousChar byte,
 	return 0
 }
 
-func smartNumberGeneric(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
+func (r *SPRenderer) smartNumberGeneric(out *bytes.Buffer, previousChar byte, text []byte) int {
 	if wordBoundary(previousChar) && previousChar != '/' && len(text) >= 3 {
 		// is it of the form digits/digits(word boundary)?, i.e., \d+/\d+\b
 		// note: check for regular slash (/) or fraction slash (⁄, 0x2044, or 0xe2 81 84 in utf-8)
@@ -318,7 +321,7 @@ func smartNumberGeneric(out *bytes.Buffer, smrt *smartypantsData, previousChar b
 	return 0
 }
 
-func smartNumber(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
+func (r *SPRenderer) smartNumber(out *bytes.Buffer, previousChar byte, text []byte) int {
 	if wordBoundary(previousChar) && previousChar != '/' && len(text) >= 3 {
 		if text[0] == '1' && text[1] == '/' && text[2] == '2' {
 			if len(text) < 4 || wordBoundary(text[3]) && text[3] != '/' {
@@ -346,27 +349,27 @@ func smartNumber(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, te
 	return 0
 }
 
-func smartDoubleQuoteVariant(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte, quote byte) int {
+func (r *SPRenderer) smartDoubleQuoteVariant(out *bytes.Buffer, previousChar byte, text []byte, quote byte) int {
 	nextChar := byte(0)
 	if len(text) > 1 {
 		nextChar = text[1]
 	}
-	if !smartQuoteHelper(out, previousChar, nextChar, quote, &smrt.inDoubleQuote, false) {
+	if !smartQuoteHelper(out, previousChar, nextChar, quote, &r.inDoubleQuote, false) {
 		out.WriteString("&quot;")
 	}
 
 	return 0
 }
 
-func smartDoubleQuote(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
+func (r *SPRenderer) smartDoubleQuote(out *bytes.Buffer, previousChar byte, text []byte) int {
-	return smartDoubleQuoteVariant(out, smrt, previousChar, text, 'd')
+	return r.smartDoubleQuoteVariant(out, previousChar, text, 'd')
 }
 
-func smartAngledDoubleQuote(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
+func (r *SPRenderer) smartAngledDoubleQuote(out *bytes.Buffer, previousChar byte, text []byte) int {
-	return smartDoubleQuoteVariant(out, smrt, previousChar, text, 'a')
+	return r.smartDoubleQuoteVariant(out, previousChar, text, 'a')
 }
 
-func smartLeftAngle(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int {
+func (r *SPRenderer) smartLeftAngle(out *bytes.Buffer, previousChar byte, text []byte) int {
 	i := 0
 
 	for i < len(text) && text[i] != '>' {
@@ -377,54 +380,78 @@ func smartLeftAngle(out *bytes.Buffer, smrt *smartypantsData, previousChar byte,
 	return i
 }
 
-type smartCallback func(out *bytes.Buffer, smrt *smartypantsData, previousChar byte, text []byte) int
+type smartCallback func(out *bytes.Buffer, previousChar byte, text []byte) int
 
-type smartypantsRenderer [256]smartCallback
+// NewSmartypantsRenderer constructs a Smartypants renderer object.
+func NewSmartypantsRenderer(flags HTMLFlags) *SPRenderer {
+	var (
+		r SPRenderer
 
-var (
+		smartAmpAngled      = r.smartAmp(true, false)
-	smartAmpAngled      = smartAmp(true, false)
+		smartAmpAngledNBSP  = r.smartAmp(true, true)
-	smartAmpAngledNBSP  = smartAmp(true, true)
+		smartAmpRegular     = r.smartAmp(false, false)
-	smartAmpRegular     = smartAmp(false, false)
+		smartAmpRegularNBSP = r.smartAmp(false, true)
-	smartAmpRegularNBSP = smartAmp(false, true)
-)
 
-func smartypants(flags int) *smartypantsRenderer {
+		addNBSP = flags&SmartypantsQuotesNBSP != 0
-	r := new(smartypantsRenderer)
+	)
-	addNBSP := flags&HTML_SMARTYPANTS_QUOTES_NBSP != 0
+
-	if flags&HTML_SMARTYPANTS_ANGLED_QUOTES == 0 {
+	if flags&SmartypantsAngledQuotes == 0 {
-		r['"'] = smartDoubleQuote
+		r.callbacks['"'] = r.smartDoubleQuote
 		if !addNBSP {
-			r['&'] = smartAmpRegular
+			r.callbacks['&'] = smartAmpRegular
 		} else {
-			r['&'] = smartAmpRegularNBSP
+			r.callbacks['&'] = smartAmpRegularNBSP
 		}
 	} else {
-		r['"'] = smartAngledDoubleQuote
+		r.callbacks['"'] = r.smartAngledDoubleQuote
 		if !addNBSP {
-			r['&'] = smartAmpAngled
+			r.callbacks['&'] = smartAmpAngled
 		} else {
-			r['&'] = smartAmpAngledNBSP
+			r.callbacks['&'] = smartAmpAngledNBSP
 		}
 	}
-	r['\''] = smartSingleQuote
+	r.callbacks['\''] = r.smartSingleQuote
-	r['('] = smartParens
+	r.callbacks['('] = r.smartParens
-	if flags&HTML_SMARTYPANTS_DASHES != 0 {
+	if flags&SmartypantsDashes != 0 {
-		if flags&HTML_SMARTYPANTS_LATEX_DASHES == 0 {
+		if flags&SmartypantsLatexDashes == 0 {
-			r['-'] = smartDash
+			r.callbacks['-'] = r.smartDash
 		} else {
-			r['-'] = smartDashLatex
+			r.callbacks['-'] = r.smartDashLatex
 		}
 	}
-	r['.'] = smartPeriod
+	r.callbacks['.'] = r.smartPeriod
-	if flags&HTML_SMARTYPANTS_FRACTIONS == 0 {
+	if flags&SmartypantsFractions == 0 {
-		r['1'] = smartNumber
+		r.callbacks['1'] = r.smartNumber
-		r['3'] = smartNumber
+		r.callbacks['3'] = r.smartNumber
 	} else {
 		for ch := '1'; ch <= '9'; ch++ {
-			r[ch] = smartNumberGeneric
+			r.callbacks[ch] = r.smartNumberGeneric
 		}
 	}
-	r['<'] = smartLeftAngle
+	r.callbacks['<'] = r.smartLeftAngle
-	r['`'] = smartBacktick
+	r.callbacks['`'] = r.smartBacktick
-	return r
+	return &r
+}
+
+// Process is the entry point of the Smartypants renderer.
+func (r *SPRenderer) Process(w io.Writer, text []byte) {
+	mark := 0
+	for i := 0; i < len(text); i++ {
+		if action := r.callbacks[text[i]]; action != nil {
+			if i > mark {
+				w.Write(text[mark:i])
+			}
+			previousChar := byte(0)
+			if i > 0 {
+				previousChar = text[i-1]
+			}
+			var tmp bytes.Buffer
+			i += action(&tmp, previousChar, text[i:])
+			w.Write(tmp.Bytes())
+			mark = i + 1
+		}
+	}
+	if mark < len(text) {
+		w.Write(text[mark:])
+	}
 }

vendor/github.com/shurcooL/sanitized_anchor_name/.travis.yml

@@ -1,11 +1,11 @@
 sudo: false
 language: go
 go:
-  - 1.7
+  - 1.x
-  - tip
+  - master
 matrix:
   allow_failures:
-    - go: tip
+    - go: master
   fast_finish: true
 install:
   - # Do nothing. This is needed to prevent default install action "go get -t -v ./..." from happening here (we want it to happen inside script step).

vendor/github.com/shurcooL/sanitized_anchor_name/LICENSE

@@ -1,3 +1,5 @@
+MIT License
+
 Copyright (c) 2015 Dmitri Shuralyov
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -7,13 +9,13 @@ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 
-The above copyright notice and this permission notice shall be included in
+The above copyright notice and this permission notice shall be included in all
-all copies or substantial portions of the Software.
+copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-THE SOFTWARE.
+SOFTWARE.

vendor/github.com/shurcooL/sanitized_anchor_name/README.md

@@ -5,9 +5,11 @@ sanitized_anchor_name
 
 Package sanitized_anchor_name provides a func to create sanitized anchor names.
 
-Its logic can be reused by multiple packages to create interoperable anchor names and links to those anchors.
+Its logic can be reused by multiple packages to create interoperable anchor names
+and links to those anchors.
 
-At this time, it does not try to ensure that generated anchor names are unique, that responsibility falls on the caller.
+At this time, it does not try to ensure that generated anchor names
+are unique, that responsibility falls on the caller.
 
 Installation
 ------------

vendor/github.com/shurcooL/sanitized_anchor_name/go.mod

@@ -0,0 +1 @@
+module github.com/shurcooL/sanitized_anchor_name

vendor/github.com/shurcooL/sanitized_anchor_name/main.go

@@ -13,7 +13,7 @@ import "unicode"
 func Create(text string) string {
 	var anchorName []rune
 	var futureDash = false
-	for _, r := range []rune(text) {
+	for _, r := range text {
 		switch {
 		case unicode.IsLetter(r) || unicode.IsNumber(r):
 			if futureDash && len(anchorName) > 0 {

vendor/golang.org/x/net/html/token.go

@@ -347,6 +347,7 @@ loop:
 			break loop
 		}
 		if c != '/' {
+			z.raw.end--
 			continue loop
 		}
 		if z.readRawEndTag() || z.err != nil {
@@ -1067,6 +1068,11 @@ loop:
 
 // Raw returns the unmodified text of the current token. Calling Next, Token,
 // Text, TagName or TagAttr may change the contents of the returned slice.
+//
+// The token stream's raw bytes partition the byte stream (up until an
+// ErrorToken). There are no overlaps or gaps between two consecutive token's
+// raw bytes. One implication is that the byte offset of the current token is
+// the sum of the lengths of all previous tokens' raw bytes.
 func (z *Tokenizer) Raw() []byte {
 	return z.buf[z.raw.start:z.raw.end]
 }

vendor/modules.txt

@@ -95,8 +95,6 @@ github.com/boombuler/barcode/qr
 github.com/boombuler/barcode/utils
 # github.com/bradfitz/gomemcache v0.0.0-20190329173943-551aad21a668
 github.com/bradfitz/gomemcache/memcache
-# github.com/chaseadamsio/goorgeous v0.0.0-20170901132237-098da33fde5f
-github.com/chaseadamsio/goorgeous
 # github.com/couchbase/gomemcached v0.0.0-20190515232915-c4b4ca0eb21d
 github.com/couchbase/gomemcached
 github.com/couchbase/gomemcached/client
@@ -332,6 +330,8 @@ github.com/mschoch/smat
 github.com/msteinert/pam
 # github.com/nfnt/resize v0.0.0-20160724205520-891127d8d1b5
 github.com/nfnt/resize
+# github.com/niklasfasching/go-org v0.1.7
+github.com/niklasfasching/go-org/org
 # github.com/oliamb/cutter v0.2.2
 github.com/oliamb/cutter
 # github.com/pelletier/go-toml v1.4.0
@@ -360,15 +360,15 @@ github.com/prometheus/common/model
 github.com/prometheus/procfs
 github.com/prometheus/procfs/internal/fs
 github.com/prometheus/procfs/internal/util
-# github.com/russross/blackfriday v0.0.0-20180428102519-11635eb403ff
+# github.com/russross/blackfriday/v2 v2.0.1
-github.com/russross/blackfriday
+github.com/russross/blackfriday/v2
 # github.com/satori/go.uuid v1.2.0
 github.com/satori/go.uuid
 # github.com/sergi/go-diff v1.0.0
 github.com/sergi/go-diff/diffmatchpatch
 # github.com/shurcooL/httpfs v0.0.0-20190527155220-6a4d4a70508b
 github.com/shurcooL/httpfs/vfsutil
-# github.com/shurcooL/sanitized_anchor_name v0.0.0-20160918041101-1dba4b3954bc
+# github.com/shurcooL/sanitized_anchor_name v1.0.0
 github.com/shurcooL/sanitized_anchor_name
 # github.com/shurcooL/vfsgen v0.0.0-20181202132449-6a9ea43bcacd
 github.com/shurcooL/vfsgen
@@ -464,7 +464,7 @@ golang.org/x/crypto/scrypt
 golang.org/x/crypto/ssh
 golang.org/x/crypto/ssh/agent
 golang.org/x/crypto/ssh/knownhosts
-# golang.org/x/net v0.0.0-20190909003024-a7b16738d86b
+# golang.org/x/net v0.0.0-20191028085509-fe3aa8a45271
 golang.org/x/net/context
 golang.org/x/net/context/ctxhttp
 golang.org/x/net/html