initial commit

draw_buffer.go

@@ -0,0 +1,13 @@
+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)
+	})
+	scr.Show()
+}

events.go

@@ -0,0 +1,7 @@
+package tui
+
+import "github.com/gdamore/tcell"
+
+type Events interface {
+	OnKeyPressed(key tcell.Key)
+}

screen.go

@@ -0,0 +1,73 @@
+package tui
+
+import (
+	"errors"
+	"fmt"
+
+	"git.tordarus.net/tordarus/buf2d"
+	"github.com/gdamore/tcell"
+)
+
+type Screen struct {
+	scr    tcell.Screen
+	stopCh chan error
+	Root   View
+}
+
+func NewScreen(root View) (*Screen, error) {
+	scr, err := tcell.NewScreen()
+	if err != nil {
+		return nil, err
+	}
+
+	s := &Screen{
+		Root:   root,
+		scr:    scr,
+		stopCh: make(chan error, 1),
+	}
+
+	go s.eventloop()
+
+	return s, nil
+}
+
+func (s *Screen) eventloop() {
+	for evt := s.scr.PollEvent(); evt != nil; evt = s.scr.PollEvent() {
+		switch event := evt.(type) {
+		case *tcell.EventResize:
+			go s.Redraw()
+		case *tcell.EventKey:
+			go func() {
+				s.Root.OnKeyPressed(event.Key())
+				s.Redraw()
+			}()
+		default:
+			s.StopWithError(errors.New(fmt.Sprintf("%#v", event)))
+		}
+	}
+	s.StopWithError(errors.New("unknown error occured"))
+}
+
+func (s *Screen) Start() error {
+	err := s.scr.Init()
+	if err != nil {
+		return err
+	}
+	s.Redraw()
+	return <-s.stopCh
+}
+
+func (s *Screen) Stop() {
+	s.StopWithError(nil)
+}
+
+func (s *Screen) StopWithError(err error) {
+	s.stopCh <- err
+}
+
+func (s *Screen) Redraw() {
+	w, h := s.scr.Size()
+	buf := buf2d.NewBuffer(w, h)
+	s.Root.Draw(buf)
+	drawBuffer(s.scr, buf)
+}

tests/screen_test.go

@@ -0,0 +1,27 @@
+package tui
+
+import (
+	"errors"
+	"fmt"
+	"testing"
+	"tui"
+	"tui/views"
+
+	"github.com/gdamore/tcell"
+)
+
+func TestScreen(t *testing.T) {
+	eventView := views.NewEventView()
+	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)))
+	}
+
+	err = screen.Start()
+	fmt.Println(err)
+}

view.go

@@ -0,0 +1,18 @@
+package tui
+
+import (
+	"git.tordarus.net/tordarus/buf2d"
+	"github.com/gdamore/tcell"
+)
+
+type View interface {
+	Events
+
+	SetForeground(color tcell.Color)
+	Foreground() tcell.Color
+
+	SetBackground(color tcell.Color)
+	Background() tcell.Color
+
+	Draw(*buf2d.Buffer)
+}

viewgroup.go

@@ -0,0 +1,6 @@
+package tui
+
+type ViewGroup interface {
+	View
+	Children() []*View
+}

views/eventview.go

@@ -0,0 +1,22 @@
+package views
+
+import (
+	"tui"
+
+	"github.com/gdamore/tcell"
+)
+
+type EventView struct {
+	tui.ViewTmpl
+	KeyPressed func(key tcell.Key)
+}
+
+func (v *EventView) OnKeyPressed(key tcell.Key) {
+	if v.KeyPressed != nil {
+		v.KeyPressed(key)
+	}
+}
+
+func NewEventView() *EventView {
+	return &EventView{}
+}

views/textview.go

@@ -0,0 +1,24 @@
+package views
+
+import (
+	"tui"
+
+	"git.tordarus.net/tordarus/buf2d"
+)
+
+type TextView struct {
+	tui.ViewTmpl
+	Text string
+}
+
+var _ tui.View = &TextView{}
+
+func (v *TextView) Draw(buf *buf2d.Buffer) {
+	buf.WriteMultiLineString(v.Text, 0, 0)
+}
+
+func NewTextView(text string) *TextView {
+	return &TextView{
+		Text: text,
+	}
+}

viewtmpl.go

@@ -0,0 +1,45 @@
+package tui
+
+import (
+	"git.tordarus.net/tordarus/buf2d"
+	"github.com/gdamore/tcell"
+)
+
+type ViewTmpl struct {
+	view View
+
+	foreground tcell.Color
+	background tcell.Color
+}
+
+var _ View = &ViewTmpl{}
+
+func NewViewTmpl(v View) *ViewTmpl {
+	return &ViewTmpl{
+		view: v,
+	}
+}
+
+func (v *ViewTmpl) Draw(buf *buf2d.Buffer) {
+	buf.Fill(' ')
+}
+
+func (v *ViewTmpl) OnKeyPressed(key tcell.Key) {
+
+}
+
+func (v *ViewTmpl) Foreground() tcell.Color {
+	return v.foreground
+}
+
+func (v *ViewTmpl) SetForeground(color tcell.Color) {
+	v.foreground = color
+}
+
+func (v *ViewTmpl) Background() tcell.Color {
+	return v.background
+}
+
+func (v *ViewTmpl) SetBackground(color tcell.Color) {
+	v.background = color
+}