Center text in mode component

src/components/channels.go

@@ -9,6 +9,7 @@ import (
 	"github.com/erroneousboat/slack-term/src/service"
 )
 
+// Channels is the definition of a Channels component
 type Channels struct {
 	List            *termui.List
 	SelectedChannel int

src/components/chat.go

@@ -8,6 +8,7 @@ import (
 	"github.com/erroneousboat/slack-term/src/service"
 )
 
+// Chat is the definition of a Chat component
 type Chat struct {
 	List   *termui.List
 	Offset int

src/components/input.go

@@ -6,7 +6,7 @@ import (
 	"github.com/erroneousboat/slack-term/src/service"
 )
 
-// Input is the definition of and input box
+// Input is the definition of an Input component
 type Input struct {
 	Par            *termui.Par
 	CursorPosition int

src/components/mode.go

@@ -2,10 +2,12 @@ package components
 
 import "github.com/gizak/termui"
 
+// Mode is the definition of Mode component
 type Mode struct {
 	Par *termui.Par
 }
 
+// CreateMode is the constructor of the Mode struct
 func CreateMode() *Mode {
 	mode := &Mode{
 		Par: termui.NewPar("NORMAL"),
@@ -19,6 +21,36 @@ func CreateMode() *Mode {
 // Buffer implements interface termui.Bufferer
 func (m *Mode) Buffer() termui.Buffer {
 	buf := m.Par.Buffer()
+
+	// Center text
+	space := m.Par.InnerWidth()
+	word := len(m.Par.Text)
+
+	midSpace := space / 2
+	midWord := word / 2
+
+	start := midSpace - midWord
+
+	cells := termui.DefaultTxBuilder.Build(
+		m.Par.Text, m.Par.TextFgColor, m.Par.TextBgColor)
+
+	i, j := 0, 0
+	x := m.Par.InnerBounds().Min.X
+	for x < m.Par.InnerBounds().Max.X {
+		if i < start {
+			buf.Set(x, m.Par.InnerY(), termui.Cell{Ch: ' '})
+			x++
+			i++
+		} else {
+			if j < len(cells) {
+				buf.Set(x, m.Par.InnerY(), cells[j])
+				i++
+				j++
+			}
+			x++
+		}
+	}
+
 	return buf
 }