Added document as an argument to the LineBreakCallback

go.mod

@@ -6,5 +6,5 @@ require (
 	github.com/mattn/go-runewidth v0.0.3
 	github.com/mattn/go-tty v0.0.0-20180219170247-931426f7535a
 	github.com/pkg/term v0.0.0-20180423043932-cda20d4ac917
-	golang.org/x/sys v0.0.0-20180620133508-ad87a3a340fa // indirect
+	golang.org/x/sys v0.0.0-20180620133508-ad87a3a340fa
 )

option.go

@@ -235,7 +235,7 @@ func OptionShowCompletionAtStart() Option {
 }
 
 // OptionBreakLineCallback to run a callback at every break line
-func OptionBreakLineCallback(fn func()) Option {
+func OptionBreakLineCallback(fn func(*Document)) Option {
 	return func(p *Prompt) error {
 		p.renderer.BreakLineCallback = fn
 		return nil

render.go

@@ -12,7 +12,7 @@ type Render struct {
 	out                ConsoleWriter
 	prefix             string
 	livePrefixCallback func() (prefix string, useLivePrefix bool)
-	BreakLineCallback  func()
+	BreakLineCallback  func(*Document)
 	title              string
 	row                uint16
 	col                uint16
@@ -237,7 +237,7 @@ func (r *Render) BreakLine(buffer *Buffer) {
 	r.out.SetColor(DefaultColor, DefaultColor, false)
 	debug.AssertNoError(r.out.Flush())
 	if r.BreakLineCallback != nil {
-		r.BreakLineCallback()
+		r.BreakLineCallback(buffer.Document())
 	}
 
 	r.previousCursor = 0

render_test.go

@@ -100,7 +100,7 @@ func TestBreakLineCallback(t *testing.T) {
 		t.Errorf("i should initially be 0, before applying a break line callback")
 	}
 
-	r.BreakLineCallback = func() {
+	r.BreakLineCallback = func(doc *Document) {
 		i++
 	}
 	r.BreakLine(b)