Fix multiline emphasis

I didn't have a test case for this and broke it when i introduced Line nodes to
support printing back to org mode. Oops

org/block.go

@@ -24,31 +24,30 @@ func lexBlock(line string) (token, bool) {
 	return nilToken, false
 }
 
+func isRawTextBlock(name string) bool { return name == "SRC" || name == "EXAMPLE" }
+
 func (d *Document) parseBlock(i int, parentStop stopFn) (int, Node) {
-	t, start, nodes := d.tokens[i], i, []Node{}
+	t, start, lines := d.tokens[i], i, []string{}
 	name, parameters := t.content, strings.Fields(t.matches[3])
 	trim := trimIndentUpTo(d.tokens[i].lvl)
 	stop := func(d *Document, i int) bool {
 		return parentStop(d, i) || (d.tokens[i].kind == "endBlock" && d.tokens[i].content == name)
 	}
-	if name == "SRC" || name == "EXAMPLE" {
-		for i++; !stop(d, i); i++ {
-			nodes = append(nodes, Line{[]Node{Text{trim(d.tokens[i].matches[0])}}})
+	block, consumed, i := Block{name, parameters, nil}, 0, i+1
+	if isRawTextBlock(name) {
+		for ; !stop(d, i); i++ {
+			lines = append(lines, trim(d.tokens[i].matches[0]))
 		}
+		consumed = i - start
+		block.Children = []Node{Text{strings.Join(lines, "\n")}}
 	} else {
-		for i++; !stop(d, i); {
-			consumed, node := d.parseParagraph(i, stop)
-			if consumed == 0 {
-				break
-			}
-			i += consumed
-			nodes = append(nodes, node)
-		}
+		consumed, block.Children = d.parseMany(i, stop)
+		consumed++ // line with BEGIN
 	}
 	if parentStop(d, i) {
 		return 0, nil
 	}
-	return i + 1 - start, Block{name, parameters, nodes}
+	return consumed + 1, block
 }
 
 func trimIndentUpTo(max int) func(string) string {

org/html.go

@@ -86,15 +86,14 @@ func (w *HTMLWriter) writeNodes(ns ...Node) {
 			w.writeParagraph(n)
 		case HorizontalRule:
 			w.writeHorizontalRule(n)
-		case Line:
-			w.writeLine(n)
-
 		case Text:
 			w.writeText(n)
 		case Emphasis:
 			w.writeEmphasis(n)
-		case Linebreak:
-			w.writeLinebreak(n)
+		case ExplicitLineBreak:
+			w.writeExplicitLineBreak(n)
+		case LineBreak:
+			w.writeLineBreak(n)
 		case RegularLink:
 			w.writeRegularLink(n)
 		case FootnoteLink:
@@ -110,18 +109,15 @@ func (w *HTMLWriter) writeNodes(ns ...Node) {
 func (w *HTMLWriter) writeBlock(b Block) {
 	switch b.Name {
 	case "SRC":
-		lines, lang := []string{}, "text"
+		source, lang := b.Children[0].(Text).Content, "text"
 		if len(b.Parameters) >= 1 {
 			lang = b.Parameters[0]
 		}
-		for _, n := range b.Children {
-			lines = append(lines, n.(Line).Children[0].(Text).Content)
-		}
-		w.WriteString(w.HighlightCodeBlock(strings.Join(lines, "\n"), lang) + "\n")
+		w.WriteString(w.HighlightCodeBlock(source, lang) + "\n")
 	case "EXAMPLE":
 		w.WriteString(`<pre class="example">` + "\n")
 		w.writeNodes(b.Children...)
-		w.WriteString("</pre>\n")
+		w.WriteString("\n</pre>\n")
 	case "QUOTE":
 		w.WriteString("<blockquote>\n")
 		w.writeNodes(b.Children...)
@@ -134,7 +130,6 @@ func (w *HTMLWriter) writeBlock(b Block) {
 		w.WriteString(fmt.Sprintf(`<div class="%s-block">`, strings.ToLower(b.Name)) + "\n")
 		w.writeNodes(b.Children...)
 		w.WriteString("</div>\n")
-
 	}
 }
 
@@ -182,7 +177,11 @@ func (w *HTMLWriter) writeEmphasis(e Emphasis) {
 	w.WriteString(tags[1])
 }
 
-func (w *HTMLWriter) writeLinebreak(l Linebreak) {
+func (w *HTMLWriter) writeLineBreak(l LineBreak) {
+	w.WriteString("\n")
+}
+
+func (w *HTMLWriter) writeExplicitLineBreak(l ExplicitLineBreak) {
 	w.WriteString("<br>\n")
 }
 
@@ -228,20 +227,16 @@ func (w *HTMLWriter) writeListItem(li ListItem) {
 	w.WriteString("</li>\n")
 }
 
-func (w *HTMLWriter) writeLine(l Line) {
-	if len(l.Children) != 0 {
-		w.writeNodes(l.Children...)
-		w.WriteString("\n")
-	}
-}
-
 func (w *HTMLWriter) writeParagraph(p Paragraph) {
-	if len(p.Children) == 1 && p.Children[0].(Line).Children == nil {
+	if isEmptyLineParagraph(p) {
 		return
 	}
-	w.WriteString("<p>\n")
+	w.WriteString("<p>")
+	if _, ok := p.Children[0].(LineBreak); !ok {
+		w.WriteString("\n")
+	}
 	w.writeNodes(p.Children...)
-	w.WriteString("</p>\n")
+	w.WriteString("\n</p>\n")
 }
 
 func (w *HTMLWriter) writeHorizontalRule(h HorizontalRule) {

org/inline.go

@@ -9,7 +9,8 @@ import (
 
 type Text struct{ Content string }
 
-type Linebreak struct{}
+type LineBreak struct{ Count int }
+type ExplicitLineBreak struct{}
 
 type Emphasis struct {
 	Kind    string
@@ -51,6 +52,8 @@ func (d *Document) parseInline(input string) (nodes []Node) {
 			consumed, node = d.parseRegularLinkOrFootnoteReference(input, current)
 		case '\\':
 			consumed, node = d.parseExplicitLineBreak(input, current)
+		case '\n':
+			consumed, node = d.parseLineBreak(input, current)
 		case ':':
 			rewind, consumed, node = d.parseAutoLink(input, current)
 			current -= rewind
@@ -75,13 +78,20 @@ func (d *Document) parseInline(input string) (nodes []Node) {
 	return nodes
 }
 
+func (d *Document) parseLineBreak(input string, start int) (int, Node) {
+	i := start
+	for ; input[i] == '\n'; i++ {
+	}
+	return i - start, LineBreak{i - start}
+}
+
 func (d *Document) parseExplicitLineBreak(input string, start int) (int, Node) {
 	if start == 0 || input[start-1] == '\n' || start+1 >= len(input) || input[start+1] != '\\' {
 		return 0, nil
 	}
-	for i := start + 1; ; i++ {
+	for i := start + 2; ; i++ {
 		if i == len(input)-1 || input[i] == '\n' {
-			return i + 1 - start, Linebreak{}
+			return i + 1 - start, ExplicitLineBreak{}
 		}
 		if !unicode.IsSpace(rune(input[i])) {
 			break
@@ -118,8 +128,7 @@ func (d *Document) parseFootnoteReference(input string, start int) (int, Node) {
 		name, definition := m[1], m[3]
 		link := FootnoteLink{name, nil}
 		if definition != "" {
-			paragraph := Paragraph{[]Node{Line{d.parseInline(definition)}}}
-			link.Definition = &FootnoteDefinition{name, []Node{paragraph}, true}
+			link.Definition = &FootnoteDefinition{name, []Node{Paragraph{d.parseInline(definition)}}, true}
 			d.Footnotes.add(name, link.Definition)
 		}
 		return len(m[0]), link

org/keyword.go

@@ -66,7 +66,7 @@ func (d *Document) parseAffiliated(i int, stop stopFn) (int, Node) {
 	consumed, node := 0, (Node)(nil)
 	if t := d.tokens[i]; t.kind == "text" {
 		if nodes := d.parseInline(t.content); len(nodes) == 1 && isImageOrVideoLink(nodes[0]) {
-			consumed, node = 1, Line{nodes[:1]}
+			consumed, node = 1, Paragraph{nodes[:1]}
 		}
 	} else {
 		consumed, node = d.parseOne(i, stop)

org/org.go

@@ -76,15 +76,14 @@ func (w *OrgWriter) writeNodes(ns ...Node) {
 			w.writeParagraph(n)
 		case HorizontalRule:
 			w.writeHorizontalRule(n)
-		case Line:
-			w.writeLine(n)
-
 		case Text:
 			w.writeText(n)
 		case Emphasis:
 			w.writeEmphasis(n)
-		case Linebreak:
-			w.writeLinebreak(n)
+		case LineBreak:
+			w.writeLineBreak(n)
+		case ExplicitLineBreak:
+			w.writeExplicitLineBreak(n)
 		case RegularLink:
 			w.writeRegularLink(n)
 		case FootnoteLink:
@@ -133,7 +132,14 @@ func (w *OrgWriter) writeBlock(b Block) {
 		w.WriteString(" " + strings.Join(b.Parameters, " "))
 	}
 	w.WriteString("\n")
-	w.writeNodes(b.Children...)
+
+	if isRawTextBlock(b.Name) {
+		for _, line := range strings.Split(b.Children[0].(Text).Content, "\n") {
+			w.WriteString(w.indent + line + "\n")
+		}
+	} else {
+		w.writeNodes(b.Children...)
+	}
 	w.WriteString(w.indent + "#+END_" + b.Name + "\n")
 }
 
@@ -160,6 +166,7 @@ func (w *OrgWriter) writeFootnoteDefinition(f FootnoteDefinition) {
 
 func (w *OrgWriter) writeParagraph(p Paragraph) {
 	w.writeNodes(p.Children...)
+	w.WriteString("\n")
 }
 
 func (w *OrgWriter) writeKeyword(k Keyword) {
@@ -221,14 +228,6 @@ func (w *OrgWriter) writeHorizontalRule(hr HorizontalRule) {
 	w.WriteString(w.indent + "-----\n")
 }
 
-func (w *OrgWriter) writeLine(l Line) {
-	if len(l.Children) != 0 {
-		w.WriteString(w.indent)
-		w.writeNodes(l.Children...)
-	}
-	w.WriteString("\n")
-}
-
 func (w *OrgWriter) writeText(t Text) { w.WriteString(t.Content) }
 
 func (w *OrgWriter) writeEmphasis(e Emphasis) {
@@ -241,16 +240,19 @@ func (w *OrgWriter) writeEmphasis(e Emphasis) {
 	w.WriteString(borders[1])
 }
 
-func (w *OrgWriter) writeLinebreak(l Linebreak) {
-	w.WriteString(`\\`)
+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) writeFootnoteLink(l FootnoteLink) {
 	w.WriteString("[fn:" + l.Name)
 	if l.Definition != nil {
 		w.WriteString(":")
-		line := l.Definition.Children[0].(Paragraph).Children[0].(Line)
-		w.writeNodes(line.Children...)
+		w.writeNodes(l.Definition.Children[0].(Paragraph).Children...)
 	}
 	w.WriteString("]")
 }

org/paragraph.go

@@ -2,9 +2,9 @@ package org
 
 import (
 	"regexp"
+	"strings"
 )
 
-type Line struct{ Children []Node }
 type Paragraph struct{ Children []Node }
 type HorizontalRule struct{}
 
@@ -26,16 +26,16 @@ func lexHorizontalRule(line string) (token, bool) {
 }
 
 func (d *Document) parseParagraph(i int, parentStop stopFn) (int, Node) {
-	lines, start := []Node{Line{d.parseInline(d.tokens[i].content)}}, i
+	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, Line{d.parseInline(d.tokens[i].content)})
+		lines = append(lines, d.tokens[i].content)
 	}
 	consumed := i - start
-	return consumed, Paragraph{lines}
+	return consumed, Paragraph{d.parseInline(strings.Join(lines, "\n"))}
 }
 
 func (d *Document) parseHorizontalRule(i int, parentStop stopFn) (int, Node) {

org/testdata/example.html

@@ -106,7 +106,6 @@ unordered list item 4
 <li>
 <p>
 <em>emphasis</em> and a hard line break <br>
-
 see?
 </p>
 </li>
@@ -147,6 +146,25 @@ links with slashes do not become <em>emphasis</em>: <a href="https://somelinksho
 </li>
 <li>
 <p>
+<code class="verbatim">multiline emphasis is
+supported - and respects MaxEmphasisNewLines (default: 1)</code>
+<em>so this
+is emphasized</em>
+</p>
+<p>
+/but
+this
+is
+not emphasized/
+</p>
+</li>
+<li>
+<p>
+empty emphasis markers like ++ // __ and so on are ignored
+</p>
+</li>
+<li>
+<p>
 subscript<sub>sub</sub> and superscript<sup>super</sup>
 </p>
 </li>
@@ -204,7 +222,9 @@ captioned soure block
 </p>
 </div>
 <div class="captioned">
+<p>
 <video src="my-video.mp4" title="my-video.mp4">my-video.mp4</video>
+</p>
 <p class="caption">
 captioned link (video in this case)
 </p>
@@ -258,7 +278,7 @@ either <code>this</code> or <code>that</code> foo.
 either <code>this</code>
 or <code>that</code> foo.
 </p>
-<h3><a href="https://github.com/chaseadamsio/goorgeous/issues/50">#50</a>: Linebreaks in lists are preserved</h3>
+<h3><a href="https://github.com/chaseadamsio/goorgeous/issues/50">#50</a>: LineBreaks in lists are preserved</h3>
 <ul>
 <li>
 <p>

org/testdata/example.org

@@ -54,6 +54,16 @@ this one is cheating a little as tags are ALWAYS printed right aligned to a give
 - links with slashes do not become /emphasis/: [[https://somelinkshouldntrenderaccidentalemphasis.com]]/ /emphasis/
 - _underlined_ *bold*  =verbatim= ~code~ +strikethrough+
 - *bold string with an *asterisk inside*
+- =multiline emphasis is
+  supported - and respects MaxEmphasisNewLines (default: 1)=
+  /so this
+  is emphasized/
+
+  /but
+  this
+  is
+  not emphasized/
+- empty emphasis markers like ++ // __ and so on are ignored
 - subscript_{sub} and superscript^{super}
 - links
   1. regular link [[https://example.com]] link without description
@@ -121,7 +131,7 @@ crazy ain't it?
 either ~this~ or ~that~ foo.
 either ~this~
 or ~that~ foo.
-*** DONE [[https://github.com/chaseadamsio/goorgeous/issues/50][#50]]: Linebreaks in lists are preserved
+*** DONE [[https://github.com/chaseadamsio/goorgeous/issues/50][#50]]: LineBreaks in lists are preserved
 - this list item
   has
   multiple

org/util.go

@@ -12,10 +12,8 @@ func isSecondBlankLine(d *Document, i int) bool {
 }
 
 func isEmptyLineParagraph(n Node) bool {
-	if p, _ := n.(Paragraph); len(p.Children) == 1 {
-		return len(p.Children[0].(Line).Children) == 0
-	}
-	return false
+	p, ok := n.(Paragraph)
+	return ok && len(p.Children) == 0
 }
 
 func isImageOrVideoLink(n Node) bool {