huge refactor

draw_buffer.go

@@ -1,13 +1,12 @@
 package tui
 
 import (
-	"git.tordarus.net/tordarus/buf2d"
 	"github.com/gdamore/tcell"
 )
 
-func drawBuffer(scr tcell.Screen, buf *buf2d.Buffer) {
-	buf.Draw(func(x, y int, cn rune) {
-		scr.SetContent(x, y, cn, nil, tcell.StyleDefault)
+func drawBuffer(scr tcell.Screen, buf *ViewBuffer) {
+	buf.ForEach(func(x, y int, rn Rune) {
+		scr.SetContent(x, y, rn.Rn, nil, rn.Style)
 	})
 	scr.Show()
 }

events.go

@@ -1,7 +1,5 @@
 package tui
 
-import "github.com/gdamore/tcell"
-
 type Events interface {
-	OnKeyPressed(key tcell.Key)
+	OnKeyPressed(event *KeyEvent) (consumed bool)
 }

go.mod

@@ -0,0 +1,16 @@
+module git.tordarus.net/Tordarus/tui
+
+go 1.18
+
+require (
+	git.tordarus.net/Tordarus/buf2d v1.1.0
+	github.com/gdamore/tcell v1.4.0
+)
+
+require (
+	github.com/gdamore/encoding v1.0.0 // indirect
+	github.com/lucasb-eyer/go-colorful v1.0.3 // indirect
+	github.com/mattn/go-runewidth v0.0.7 // indirect
+	golang.org/x/sys v0.0.0-20190626150813-e07cf5db2756 // indirect
+	golang.org/x/text v0.3.0 // indirect
+)

go.sum

@@ -0,0 +1,14 @@
+git.tordarus.net/Tordarus/buf2d v1.1.0 h1:rIZjD7yeX5XK2D1h75ET5Og0u/NQF3eVonnC5aaqVkQ=
+git.tordarus.net/Tordarus/buf2d v1.1.0/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=
+github.com/gdamore/tcell v1.4.0/go.mod h1:vxEiSDZdW3L+Uhjii9c3375IlDmR05bzxY404ZVSMo0=
+github.com/lucasb-eyer/go-colorful v1.0.3 h1:QIbQXiugsb+q10B+MI+7DI1oQLdmnep86tWFlaaUAac=
+github.com/lucasb-eyer/go-colorful v1.0.3/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
+github.com/mattn/go-runewidth v0.0.7 h1:Ei8KR0497xHyKJPAv59M1dkC+rOZCMBJ+t3fZ+twI54=
+github.com/mattn/go-runewidth v0.0.7/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
+golang.org/x/sys v0.0.0-20190626150813-e07cf5db2756 h1:9nuHUbU8dRnRRfj9KjWUVrJeoexdbeMjttk6Oh1rD10=
+golang.org/x/sys v0.0.0-20190626150813-e07cf5db2756/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

rune.go

@@ -0,0 +1,60 @@
+package tui
+
+import "regexp"
+
+type Rune struct {
+	Rn    rune
+	Style Style
+}
+
+var DefaultRune = Rune{' ', StyleDefault}
+
+// Text represents a string with rune-based styling
+type Text struct {
+	str   string
+	style []Style
+}
+
+// Txt returns a Text containing the given str
+// using the default style
+func Txt(str string) *Text {
+	styles := make([]Style, 0, len(str))
+	for range str {
+		styles = append(styles, StyleDefault)
+	}
+	return &Text{str: str, style: styles}
+}
+
+// Len returns the amount of runes in t
+func (t *Text) Len() int {
+	return len(t.style)
+}
+
+// AppendString appends str with default styling to t
+func (t *Text) AppendString(str string) {
+	t.AppendText(Txt(str))
+}
+
+// PrependString prepends str with default styling to t
+func (t *Text) PrependString(str string) {
+	newTxt := Txt(str)
+	newTxt.AppendText(t)
+	*t = *newTxt
+}
+
+// AppendText appends txt to t
+func (t *Text) AppendText(txt *Text) {
+	t.str += txt.str
+	t.style = append(t.style, txt.style...)
+}
+
+// Style applies the given style to the part of t between startIndex (inclusive) and endIndex (exclusive)
+func (t *Text) Style(style Style, startIndex, endIndex int) {
+	for i := startIndex; i < endIndex; i++ {
+		t.style[i] = style
+	}
+}
+
+func (t *Text) StyleRegex(style Style, pattern *regexp.Regexp) {
+	// TODO
+}

screen.go

@@ -4,7 +4,7 @@ import (
 	"errors"
 	"fmt"
 
-	"git.tordarus.net/tordarus/buf2d"
+	"git.tordarus.net/Tordarus/buf2d"
 	"github.com/gdamore/tcell"
 )
 
@@ -38,7 +38,7 @@ func (s *Screen) eventloop() {
 			go s.Redraw()
 		case *tcell.EventKey:
 			go func() {
-				s.Root.OnKeyPressed(event.Key())
+				s.Root.OnKeyPressed(event)
 				s.Redraw()
 			}()
 		default:
@@ -53,6 +53,8 @@ func (s *Screen) Start() error {
 	if err != nil {
 		return err
 	}
+	defer s.scr.Fini()
+
 	s.Redraw()
 	return <-s.stopCh
 }
@@ -67,7 +69,7 @@ func (s *Screen) StopWithError(err error) {
 
 func (s *Screen) Redraw() {
 	w, h := s.scr.Size()
-	buf := buf2d.NewBuffer(w, h)
+	buf := buf2d.NewBuffer(w, h, DefaultRune)
 	s.Root.Draw(buf)
 	drawBuffer(s.scr, buf)
 }

tests/screen_test.go

@@ -4,22 +4,28 @@ import (
 	"errors"
 	"fmt"
 	"testing"
-	"tui"
-	"tui/views"
 
+	"git.tordarus.net/Tordarus/tui"
+	"git.tordarus.net/Tordarus/tui/views"
 	"github.com/gdamore/tcell"
 )
 
 func TestScreen(t *testing.T) {
-	eventView := views.NewEventView()
+	textView := views.NewTextView("hello world")
+	eventView := views.NewEventView(textView)
 	screen, err := tui.NewScreen(eventView)
 	if err != nil {
 		t.Error(err)
 		return
 	}
 
-	eventView.KeyPressed = func(key tcell.Key) {
-		screen.StopWithError(errors.New(fmt.Sprintf("%#v", key)))
+	eventView.KeyPressed = func(event *tui.KeyEvent) (consumed bool) {
+		if event.Key() == tcell.KeyCtrlC {
+			screen.StopWithError(errors.New(fmt.Sprintf("key: %#v | rune: %s", event.Key(), string(event.Rune()))))
+		}
+
+		//textView.Text = event.When().String()
+		return true
 	}
 
 	err = screen.Start()

types.go

@@ -0,0 +1,13 @@
+package tui
+
+import (
+	"git.tordarus.net/Tordarus/buf2d"
+	"github.com/gdamore/tcell"
+)
+
+type ViewBuffer = buf2d.Buffer[Rune]
+type KeyEvent = tcell.EventKey
+type Style = tcell.Style
+type Color = tcell.Color
+
+var StyleDefault Style = tcell.StyleDefault

utils.go

@@ -0,0 +1,31 @@
+package tui
+
+import (
+	"strings"
+)
+
+// WriteString writes a whole string to the buffer at position (x,y)
+// no word wrap is applied at all. If the string does not fit, it will be truncated
+func WriteString(b *ViewBuffer, str string, style Style, x, y int) {
+	dx := x
+	for _, r := range str {
+		if dx >= b.Width() {
+			return
+		}
+		b.Set(dx, y, Rune{r, style})
+		dx++
+	}
+}
+
+// WriteMultiLineString writes a multi-line string to the buffer at position (x,y)
+// no word wrap is applied at all. If a line does not fit horizontally, it will be truncated
+// All lines which do not fit vertically will be truncated as well
+func WriteMultiLineString(b *ViewBuffer, str string, style Style, x, y int) {
+	lines := strings.Split(str, "\n")
+	for dy, line := range lines {
+		if dy >= b.Height() {
+			return
+		}
+		WriteString(b, line, style, x, y+dy)
+	}
+}

view.go

@@ -1,18 +1,40 @@
 package tui
 
-import (
-	"git.tordarus.net/tordarus/buf2d"
-	"github.com/gdamore/tcell"
-)
-
+// View defines the behavior of any element displayable on screen
+// To define custom Views, it is recommended to add ViewTmpl
+// as the promoted anonymous field for your custom View struct.
+// It implements the View interface with useful default behavior
 type View interface {
 	Events
 
-	SetForeground(color tcell.Color)
-	Foreground() tcell.Color
+	SetForeground(color Color)
+	Foreground() Color
 
-	SetBackground(color tcell.Color)
-	Background() tcell.Color
+	SetBackground(color Color)
+	Background() Color
 
-	Draw(*buf2d.Buffer)
+	Style() Style
+
+	Draw(*ViewBuffer)
+}
+
+// Group defines the behavior of a View which can hold multiple sub views
+// To define custom Groups, it is recommended to add GroupTmpl
+// as the promoted anonymous field for your custom Wrapper struct.
+// It implements the Group interface with useful default behavior
+type Group interface {
+	View
+
+	Children() []View
+}
+
+// Wrapper defines the behavior of a GroupView which can hold exactly one sub view
+// To define custom Wrappers, it is recommended to add WrapperTmpl
+// as the promoted anonymous field for your custom Wrapper struct.
+// It implements the Wrapper interface with useful default behavior
+type Wrapper interface {
+	Group
+
+	SetView(View)
+	View() View
 }

viewgroup.go

@@ -1,6 +1,3 @@
 package tui
 
-type ViewGroup interface {
-	View
-	Children() []*View
-}
+// TODO GroupTmpl

views/eventview.go

@@ -1,22 +1,27 @@
 package views
 
 import (
-	"tui"
-
-	"github.com/gdamore/tcell"
+	"git.tordarus.net/Tordarus/tui"
 )
 
 type EventView struct {
-	tui.ViewTmpl
-	KeyPressed func(key tcell.Key)
+	tui.WrapperTmpl
+
+	View       tui.View
+	KeyPressed func(event *tui.KeyEvent) (consumed bool)
 }
 
-func (v *EventView) OnKeyPressed(key tcell.Key) {
+func NewEventView(view tui.View) *EventView {
+	return &EventView{View: view}
+}
+
+func (v *EventView) OnKeyPressed(event *tui.KeyEvent) (consumed bool) {
 	if v.KeyPressed != nil {
-		v.KeyPressed(key)
+		return v.KeyPressed(event)
 	}
+	return v.ViewTmpl.OnKeyPressed(event)
 }
 
-func NewEventView() *EventView {
-	return &EventView{}
+func (v *EventView) Draw(buf *tui.ViewBuffer) {
+	v.View.Draw(buf)
 }

views/textview.go

@@ -1,9 +1,7 @@
 package views
 
 import (
-	"tui"
-
-	"git.tordarus.net/tordarus/buf2d"
+	"git.tordarus.net/Tordarus/tui"
 )
 
 type TextView struct {
@@ -13,8 +11,8 @@ type TextView struct {
 
 var _ tui.View = &TextView{}
 
-func (v *TextView) Draw(buf *buf2d.Buffer) {
-	buf.WriteMultiLineString(v.Text, 0, 0)
+func (v *TextView) Draw(buf *tui.ViewBuffer) {
+	tui.WriteMultiLineString(buf, v.Text, v.Style(), 0, 0)
 }
 
 func NewTextView(text string) *TextView {

viewtmpl.go

@@ -1,45 +1,44 @@
 package tui
 
-import (
-	"git.tordarus.net/tordarus/buf2d"
-	"github.com/gdamore/tcell"
-)
+import "github.com/gdamore/tcell"
 
 type ViewTmpl struct {
-	view View
-
-	foreground tcell.Color
-	background tcell.Color
+	foreground *Color
+	background *Color
 }
 
 var _ View = &ViewTmpl{}
 
-func NewViewTmpl(v View) *ViewTmpl {
-	return &ViewTmpl{
-		view: v,
-	}
+func (v *ViewTmpl) Draw(buf *ViewBuffer) {
+	buf.Fill(DefaultRune)
 }
 
-func (v *ViewTmpl) Draw(buf *buf2d.Buffer) {
-	buf.Fill(' ')
+func (v *ViewTmpl) OnKeyPressed(event *KeyEvent) (consumed bool) {
+	return false
 }
 
-func (v *ViewTmpl) OnKeyPressed(key tcell.Key) {
-
+func (v *ViewTmpl) Style() Style {
+	return StyleDefault.Background(v.Background()).Foreground(v.Foreground())
 }
 
-func (v *ViewTmpl) Foreground() tcell.Color {
-	return v.foreground
+func (v *ViewTmpl) Foreground() Color {
+	if v.foreground == nil {
+		return tcell.ColorDefault
+	}
+	return *v.foreground
 }
 
-func (v *ViewTmpl) SetForeground(color tcell.Color) {
-	v.foreground = color
+func (v *ViewTmpl) SetForeground(color Color) {
+	v.foreground = &color
 }
 
-func (v *ViewTmpl) Background() tcell.Color {
-	return v.background
+func (v *ViewTmpl) Background() Color {
+	if v.background == nil {
+		return tcell.ColorDefault
+	}
+	return *v.background
 }
 
-func (v *ViewTmpl) SetBackground(color tcell.Color) {
-	v.background = color
+func (v *ViewTmpl) SetBackground(color Color) {
+	v.background = &color
 }

wrappertmpl.go

@@ -0,0 +1,74 @@
+package tui
+
+import "github.com/gdamore/tcell"
+
+type WrapperTmpl struct {
+	ViewTmpl
+	view View
+}
+
+var _ Wrapper = &WrapperTmpl{}
+
+func (v *WrapperTmpl) Draw(buf *ViewBuffer) {
+	if v.view != nil {
+		v.view.Draw(buf)
+	} else {
+		v.ViewTmpl.Draw(buf)
+	}
+}
+
+func (v *WrapperTmpl) OnKeyPressed(event *KeyEvent) (consumed bool) {
+	if v.view != nil {
+		return v.view.OnKeyPressed(event)
+	}
+	return v.ViewTmpl.OnKeyPressed(event)
+}
+
+func (v *WrapperTmpl) Style() Style {
+	if v.view != nil {
+		return v.view.Style()
+	}
+	return v.ViewTmpl.Style()
+}
+
+func (v *WrapperTmpl) Foreground() Color {
+	if v.view != nil {
+		return v.view.Foreground()
+	}
+	return v.ViewTmpl.Foreground()
+}
+
+func (v *WrapperTmpl) SetForeground(color Color) {
+	if v.view != nil {
+		v.view.SetForeground(color)
+	} else {
+		v.ViewTmpl.SetForeground(color)
+	}
+}
+
+func (v *WrapperTmpl) Background() Color {
+	if v.background == nil {
+		return tcell.ColorDefault
+	}
+	return *v.background
+}
+
+func (v *WrapperTmpl) SetBackground(color Color) {
+	if v.view != nil {
+		v.view.SetBackground(color)
+	} else {
+		v.ViewTmpl.SetBackground(color)
+	}
+}
+
+func (v *WrapperTmpl) Children() []View {
+	return []View{v.view}
+}
+
+func (v *WrapperTmpl) View() View {
+	return v.view
+}
+
+func (v *WrapperTmpl) SetView(view View) {
+	v.view = view
+}