hide specific borders in BorderView

go.mod

@@ -4,7 +4,7 @@ go 1.18
 
 require (
 	git.tordarus.net/Tordarus/adverr v0.2.0
-	git.tordarus.net/Tordarus/buf2d v1.1.2
+	git.tordarus.net/Tordarus/buf2d v1.1.4
 	github.com/gdamore/tcell v1.4.0
 	github.com/mattn/go-runewidth v0.0.7
 )

go.sum

@@ -1,7 +1,7 @@
 git.tordarus.net/Tordarus/adverr v0.2.0 h1:kLYjR2/Vb2GHiSAMvAv+WPNaHR9BRphKanf8H/pCZdA=
 git.tordarus.net/Tordarus/adverr v0.2.0/go.mod h1:XRf0+7nhOkIEr0gi9DUG4RvV2KaOFB0fYPDaR1KLenw=
-git.tordarus.net/Tordarus/buf2d v1.1.2 h1:mmK3tARa30gCh4WaYoSEF5e7qk0C+1ODhxerUcfXN5M=
+git.tordarus.net/Tordarus/buf2d v1.1.4 h1:5R33Bq/no3uQIk7Tql6z55LI635DHeXQ7STNz0R7FQQ=
-git.tordarus.net/Tordarus/buf2d v1.1.2/go.mod h1:XXPpS8nQK0gUI0ki7ftV/qlprsGCRWFVSD4ybvDuUL8=
+git.tordarus.net/Tordarus/buf2d v1.1.4/go.mod h1:XXPpS8nQK0gUI0ki7ftV/qlprsGCRWFVSD4ybvDuUL8=
 github.com/gdamore/encoding v1.0.0 h1:+7OoQ1Bc6eTm5niUzBa0Ctsh6JbMW6Ra+YNuAtDBdko=
 github.com/gdamore/encoding v1.0.0/go.mod h1:alR0ol34c49FCSBLjhosxzcPHQbf2trDkoo5dl+VrEg=
 github.com/gdamore/tcell v1.4.0 h1:vUnHwJRvcPQa3tzi+0QI4U9JINXYJlOz9yiaiPQ2wMU=

tests/screen_test.go

@@ -82,6 +82,22 @@ func TestScrollView(t *testing.T) {
 	fmt.Println(err)
 }
 
+func TestBorderView(t *testing.T) {
+	textView := views.NewTextView("hello world!")
+	borderView := views.NewBorderView(textView)
+	//borderView2 := views.NewBorderView(borderView)
+
+	screen, err := tui.NewScreen(borderView)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+
+	if err := screen.Start(); err != nil {
+		fmt.Println(err)
+	}
+}
+
 func TestFlowLayout(t *testing.T) {
 	textView := views.NewTextView("hello world!")
 	textView.SetStyle(tui.StyleDefault.Background(tcell.ColorRed).Foreground(tcell.ColorBlack))

types.go

@@ -41,6 +41,16 @@ const (
 	SideRight
 )
 
+// Horizontal returns true if s is either SideLeft or SideRight
+func (s Side) Horizontal() bool {
+	return s == SideLeft || s == SideRight
+}
+
+// Vertical returns true if s is either SideTop or SideBottom
+func (s Side) Vertical() bool {
+	return s == SideTop || s == SideBottom
+}
+
 type Anchor uint8
 
 const (

views/layout_flow.go

@@ -49,10 +49,7 @@ func (g *FlowLayout) removeView(v tui.View) {
 }
 
 func (g *FlowLayout) RemoveViews(v ...tui.View) {
-	views := make([]tui.View, 0, len(v))
+	views := append(make([]tui.View, 0, len(v)), v...)
-	for _, view := range v {
-		views = append(views, view)
-	}
 	for _, view := range views {
 		g.removeView(view)
 	}

views/view_border.go

@@ -8,47 +8,107 @@ import "git.tordarus.net/Tordarus/tui"
 type BorderView struct {
 	tui.WrapperTmpl
 	Border     BorderBox
-	HideBorder bool
+	ShowBorder map[tui.Side]bool
 }
 
 var _ tui.Wrapper = &BorderView{}
 
-func NewBorderView(view tui.View) *BorderView {
+// NewBorderView create a new BorderView which show borders on the given sides around its view.
+// If no sides are given, all sides will have a border by default
+func NewBorderView(view tui.View, showBorders ...tui.Side) *BorderView {
 	v := new(BorderView)
 	v.SetView(view)
 	v.Border = ThinBorder()
+
+	if len(showBorders) == 0 {
+		v.ShowBorder = map[tui.Side]bool{
+			tui.SideBottom: true,
+			tui.SideTop:    true,
+			tui.SideLeft:   true,
+			tui.SideRight:  true,
+		}
+	} else {
+		v.ShowBorder = map[tui.Side]bool{}
+		for _, border := range showBorders {
+			v.ShowBorder[border] = true
+		}
+	}
+
 	return v
 }
 
 func (g *BorderView) Draw(buf *tui.ViewBuffer) {
-	if g.HideBorder {
+	viewbuf := buf
-		g.View().Draw(buf)
+
-		return
+	// limit view buffer for child view
+	if g.ShowBorder[tui.SideTop] {
+		viewbuf = viewbuf.Sub(0, 1, viewbuf.Width(), viewbuf.Height())
+	}
+	if g.ShowBorder[tui.SideBottom] {
+		viewbuf = viewbuf.Sub(0, 0, viewbuf.Width(), viewbuf.Height()-1)
+	}
+	if g.ShowBorder[tui.SideLeft] {
+		viewbuf = viewbuf.Sub(1, 0, viewbuf.Width(), viewbuf.Height())
+	}
+	if g.ShowBorder[tui.SideRight] {
+		viewbuf = viewbuf.Sub(0, 0, viewbuf.Width()-1, viewbuf.Height())
 	}
 
-	g.View().Draw(buf.Sub(1, 1, buf.Width()-2, buf.Height()-2))
+	// draw child view
+	g.View().Draw(viewbuf)
 
-	buf.Set(0, 0, tui.Rune{Rn: g.Border.TopLeft, Style: g.Style()})
+	// draw horizontal lines
-	buf.Set(buf.Width()-1, 0, tui.Rune{Rn: g.Border.TopRight, Style: g.Style()})
+	for x := 0; x < buf.Width(); x++ {
-
+		if g.ShowBorder[tui.SideTop] {
-	buf.Set(0, buf.Height()-1, tui.Rune{Rn: g.Border.BottomLeft, Style: g.Style()})
-	buf.Set(buf.Width()-1, buf.Height()-1, tui.Rune{Rn: g.Border.BottomRight, Style: g.Style()})
-
-	for x := 1; x < buf.Width()-1; x++ {
 			buf.Set(x, 0, tui.Rune{Rn: g.Border.Horizontal, Style: g.Style()})
+		}
+		if g.ShowBorder[tui.SideBottom] {
 			buf.Set(x, buf.Height()-1, tui.Rune{Rn: g.Border.Horizontal, Style: g.Style()})
 		}
+	}
 
-	for y := 1; y < buf.Height()-1; y++ {
+	// draw vertical lines
+	for y := 0; y < buf.Height(); y++ {
+		if g.ShowBorder[tui.SideLeft] {
 			buf.Set(0, y, tui.Rune{Rn: g.Border.Vertical, Style: g.Style()})
+		}
+		if g.ShowBorder[tui.SideRight] {
 			buf.Set(buf.Width()-1, y, tui.Rune{Rn: g.Border.Vertical, Style: g.Style()})
 		}
+	}
+
+	// draw corners
+	if g.ShowBorder[tui.SideTop] {
+		if g.ShowBorder[tui.SideLeft] {
+			buf.Set(0, 0, tui.Rune{Rn: g.Border.TopLeft, Style: g.Style()})
+		}
+		if g.ShowBorder[tui.SideRight] {
+			buf.Set(buf.Width()-1, 0, tui.Rune{Rn: g.Border.TopRight, Style: g.Style()})
+		}
+	}
+	if g.ShowBorder[tui.SideBottom] {
+		if g.ShowBorder[tui.SideLeft] {
+			buf.Set(0, buf.Height()-1, tui.Rune{Rn: g.Border.BottomLeft, Style: g.Style()})
+		}
+		if g.ShowBorder[tui.SideRight] {
+			buf.Set(buf.Width()-1, buf.Height()-1, tui.Rune{Rn: g.Border.BottomRight, Style: g.Style()})
+		}
+	}
 }
 
 func (v *BorderView) Layout() (prefWidth, prefHeight int) {
 	w, h := v.View().Layout()
-	w = iff(w > 0, w+2, w)
+
-	h = iff(h > 0, h+2, h)
+	for side, border := range v.ShowBorder {
+		if border {
+			if side.Horizontal() {
+				w++
+			} else if side.Vertical() {
+				h++
+			}
+		}
+	}
+
 	return w, h
 }