From 31a88b7ba4eeef416d9e3bf726d283878cc3bfd0 Mon Sep 17 00:00:00 2001
From: Qi Xiao <xiaqqaix@gmail.com>
Date: Sat, 13 Oct 2018 18:34:28 +0100
Subject: [PATCH] newedit/core: Unexport Highlighter.

---
 newedit/core/editor.go | 11 ++++++-----
 newedit/core/render.go |  4 ++--
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/newedit/core/editor.go b/newedit/core/editor.go
index 280e671e..92611b5c 100644
--- a/newedit/core/editor.go
+++ b/newedit/core/editor.go
@@ -30,8 +30,9 @@ type Editor struct {
 	// that has been read.
 	AfterReadline func(string)
 
-	// Callback for highlighting the code the user has typed.
-	Highlighter Highlighter
+	// Callback for computing the highlight and errors of the code the user has
+	// typed.
+	Highlighter func(string) (styled.Text, []error)
 
 	// Left-hand and right-hand prompt.
 	Prompt, RPrompt Prompt
@@ -204,11 +205,11 @@ func (ed *Editor) Notify(note string) {
 	ed.Redraw(false)
 }
 
-// Highlighter is the type of callbacks for highlighting code.
-type Highlighter func(string) (styled.Text, []error)
+// Callbacks for highlighting code.
+type highlighter func(string) (styled.Text, []error)
 
 // Calls the highlighter, falling back to no highlighting if hl is nil.
-func (hl Highlighter) call(code string) (styled.Text, []error) {
+func (hl highlighter) call(code string) (styled.Text, []error) {
 	if hl == nil {
 		return styled.Unstyled(code), nil
 	}
diff --git a/newedit/core/render.go b/newedit/core/render.go
index 512d72da..93408c6f 100644
--- a/newedit/core/render.go
+++ b/newedit/core/render.go
@@ -16,7 +16,7 @@ type renderSetup struct {
 	prompt  styled.Text
 	rprompt styled.Text
 
-	highlighter Highlighter
+	highlighter highlighter
 
 	initMode types.Mode
 }
@@ -46,7 +46,7 @@ func render(st *types.RawState, r *renderSetup) (notes, main *ui.Buffer) {
 
 var transformerForPending = "underline"
 
-func prepareCode(code string, dot int, pending *types.PendingCode, hl Highlighter) (
+func prepareCode(code string, dot int, pending *types.PendingCode, hl highlighter) (
 	styledCode styled.Text, newDot int, errors []error) {
 
 	newDot = dot