Add cursor functionality

src/components/input.go

@@ -3,7 +3,7 @@ package components
 import "github.com/gizak/termui"
 
 type Input struct {
-	Block          *termui.Par
+	Par            *termui.Par
 	CursorPosition int
 	CursorFgColor  termui.Attribute
 	CursorBgColor  termui.Attribute
@@ -11,88 +11,89 @@ type Input struct {
 
 func CreateInput() *Input {
 	input := &Input{
-		Block:          termui.NewPar(""),
+		Par:            termui.NewPar(""),
 		CursorPosition: 0,
 		CursorBgColor:  termui.ColorBlack,
 		CursorFgColor:  termui.ColorWhite,
 	}
 
-	input.Block.Height = 3
+	input.Par.Height = 3
 
 	return input
 }
 
 // implements interface termui.Bufferer
 func (i *Input) Buffer() termui.Buffer {
-	return i.Block.Buffer()
+	buf := i.Par.Buffer()
+
+	// Set cursor
+	char := buf.At(i.Par.InnerX()+i.CursorPosition, i.Par.Block.InnerY())
+	buf.Set(
+		i.Par.InnerX()+i.CursorPosition,
+		i.Par.Block.InnerY(),
+		termui.Cell{Ch: char.Ch, Fg: termui.ColorBlack, Bg: termui.ColorWhite},
+	)
+
+	return buf
 }
 
 // implements interface termui.GridBufferer
 func (i *Input) GetHeight() int {
-	return i.Block.GetHeight()
+	return i.Par.Block.GetHeight()
 }
 
 // implements interface termui.GridBufferer
 func (i *Input) SetWidth(w int) {
-	i.Block.SetWidth(w)
+	i.Par.SetWidth(w)
 }
 
 // implements interface termui.GridBufferer
 func (i *Input) SetX(x int) {
-	i.Block.SetX(x)
+	i.Par.SetX(x)
 }
 
 // implements interface termui.GridBufferer
 func (i *Input) SetY(y int) {
-	i.Block.SetY(y)
+	i.Par.SetY(y)
 }
 
 func (i *Input) Insert(key string) {
-	i.Block.Text = i.Block.Text + key
+	i.Par.Text = i.Par.Text[0:i.CursorPosition] + key + i.Par.Text[i.CursorPosition:len(i.Par.Text)]
+
 	i.MoveCursorRight()
 }
 
 func (i *Input) Remove() {
 	if i.CursorPosition > 0 {
-		i.Block.Text = i.Block.Text[0:i.CursorPosition-1] + i.Block.Text[i.CursorPosition:len(i.Block.Text)]
+		i.Par.Text = i.Par.Text[0:i.CursorPosition-1] + i.Par.Text[i.CursorPosition:len(i.Par.Text)]
 		i.MoveCursorLeft()
 	}
 }
 
 func (i *Input) MoveCursorRight() {
-	if i.CursorPosition < len(i.Block.Text) {
+	if i.CursorPosition < len(i.Par.Text) {
 		i.CursorPosition++
-		i.Block.Block.Buffer().Set(
-			i.CursorPosition,       // x
-			i.Block.Block.InnerY(), // y
-			termui.Cell{Ch: rune('$'), Fg: termui.ColorBlack, Bg: termui.ColorWhite},
-		)
 	}
 }
 
 func (i *Input) MoveCursorLeft() {
 	if i.CursorPosition > 0 {
 		i.CursorPosition--
-		i.Block.Block.Buffer().Set(
-			i.CursorPosition,       // x
-			i.Block.Block.InnerY(), // y
-			termui.Cell{Ch: rune('$'), Fg: termui.ColorBlack, Bg: termui.ColorWhite},
-		)
 	}
 }
 
 func (i *Input) IsEmpty() bool {
-	if i.Block.Text == "" {
+	if i.Par.Text == "" {
 		return true
 	}
 	return false
 }
 
 func (i *Input) Clear() {
-	i.Block.Text = ""
+	i.Par.Text = ""
 	i.CursorPosition = 0
 }
 
 func (i *Input) Text() string {
-	return i.Block.Text
+	return i.Par.Text
 }

src/views/chat.go

@@ -15,8 +15,8 @@ type View struct {
 
 func CreateChatView() *View {
 	input := components.CreateInput()
-	channels := components.CreateChannelsComponent(input.Block.Height)
-	chat := components.CreateChatComponent(input.Block.Height)
+	channels := components.CreateChannelsComponent(input.Par.Height)
+	chat := components.CreateChatComponent(input.Par.Height)
 	mode := components.CreateModeComponent()
 
 	view := &View{