From d0b616b12bb1f6f7362f8756259222720a26a14f Mon Sep 17 00:00:00 2001
From: Christian Muehlhaeuser <muesli@gmail.com>
Date: Mon, 2 Dec 2019 15:23:45 +0100
Subject: [PATCH] Children in a Document or Paragraph element inherit their
 parent's color styles

---
 baselement.go | 2 +-
 document.go   | 2 ++
 gold.go       | 9 +++++----
 paragraph.go  | 2 ++
 4 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/baselement.go b/baselement.go
index cec00d7..fce4335 100644
--- a/baselement.go
+++ b/baselement.go
@@ -68,7 +68,7 @@ func (e *BaseElement) Render(w io.Writer, node *bf.Node, tr *TermRenderer) error
 		}
 	}()
 
-	rules := tr.style[e.Style]
+	rules := cascadeStyles(tr.blockStyle, tr.style[e.Style])
 	if rules == nil {
 		_, _ = w.Write([]byte(e.Token))
 		return nil
diff --git a/document.go b/document.go
index 2a9014c..1c90aba 100644
--- a/document.go
+++ b/document.go
@@ -12,6 +12,7 @@ type DocumentElement struct {
 func (e *DocumentElement) Render(w io.Writer, node *bf.Node, tr *TermRenderer) error {
 	rules := tr.style[Document]
 	if rules != nil {
+		tr.blockStyle.Push(rules)
 		if rules.Prefix != "" {
 			renderText(w, rules, rules.Prefix)
 		}
@@ -38,6 +39,7 @@ func (e *DocumentElement) Finish(w io.Writer, node *bf.Node, tr *TermRenderer) e
 		return err
 	}
 	tr.document.Reset()
+	tr.blockStyle.Pop()
 
 	if suffix != "" {
 		renderText(iw, rules, suffix)
diff --git a/gold.go b/gold.go
index 7329e03..5bde965 100644
--- a/gold.go
+++ b/gold.go
@@ -22,10 +22,11 @@ type TermRenderer struct {
 	BaseURL  string
 	WordWrap int
 
-	style     map[StyleType]*ElementStyle
-	document  bytes.Buffer
-	paragraph *bytes.Buffer
-	table     TableElement
+	style      map[StyleType]*ElementStyle
+	document   bytes.Buffer
+	paragraph  *bytes.Buffer
+	blockStyle StyleStack
+	table      TableElement
 }
 
 func Render(in string, stylePath string) ([]byte, error) {
diff --git a/paragraph.go b/paragraph.go
index ca5f583..4776b13 100644
--- a/paragraph.go
+++ b/paragraph.go
@@ -23,6 +23,7 @@ func (e *ParagraphElement) Render(w io.Writer, node *bf.Node, tr *TermRenderer)
 	if rules == nil {
 		_, _ = w.Write([]byte(pre))
 	} else {
+		tr.blockStyle.Push(rules)
 		renderText(w, rules, pre)
 
 		if rules.Prefix != "" {
@@ -52,5 +53,6 @@ func (e *ParagraphElement) Finish(w io.Writer, node *bf.Node, tr *TermRenderer)
 	_, err := iw.Write(reflow.ReflowBytes(tr.paragraph.Bytes(), tr.WordWrap-int(indent)))
 	tr.paragraph.Reset()
 	tr.paragraph = nil
+	tr.blockStyle.Pop()
 	return err
 }