feat: tx: implemented more stuff and reorganized way to handle signals and keys.

aes/es.go

@@ -67,7 +67,7 @@ const (
 	RequestCursorPosition = CSI+"6n"
 
 	SaveCursorPositionDEC = ESC+" 7"
-	UnodCursorPositionDEC = ESC+" 8"
+	UndoCursorPositionDEC = ESC+" 8"
 
 	SaveCursorPositionSCO = CSI+"s"
 	UndoCursorPositionSCO = CSI+"u"

cmd/termsize/main.go

@@ -3,7 +3,7 @@ package main
 import "surdeus.su/core/cli/tx"
 import "log"
 import "os"
-import "io"
+//import "io"
 import "surdeus.su/core/cli/aes"
 //import "fmt"
 
@@ -12,27 +12,34 @@ func main() {
 	term, err := tx.NewTerminal(os.Stdin)
 	if err != nil {
 		// Some not terminal handling.
-		log.Fatal("tx.NewTerminal(...): %s\n", err)
+		log.Fatalf("tx.NewTerminal(...): %s\n", err)
+	}
+	keys, signals, err := term.MakeRaw()
+	if err != nil {
+		log.Fatalf("term.MakeRaw(...) %s\n", err)
 	}
-	term.MakeRaw()
 	term.EnableAltBuffer()
 	defer term.Restore()
 
-	w, h, err := term.GetSize()
-	if err != nil {
-		log.Fatalf("term.GetSize(...): %s\n", err)
+	MAIN:
+	for { select {
+	// Handling signals.
+	case sig := <-signals :
+		if sig == tx.SignalWinChange {
+			term.SaveCursor()
+			term.MoveCursorHome()
+			w, h, _ := term.Size()
+			term.Printf("%dx%d", w, h)
+			term.UndoCursor()
 		}
-	term.Printf("TermSize: %dx%d\r\n", w, h)
-
-	for {
-		key, _, err := term.ReadKey()
-
+	// Handling keys.
+	case key := <-keys :
 		if key == tx.KeyControlC {
-			break
+			break MAIN
 		}
 		if !normalMode && key == tx.KeyESC {
 			normalMode = true
-			continue
+			break
 		}
 		if normalMode { switch key {
 		case 'j':
@@ -47,25 +54,19 @@ func main() {
 		case 'i' :
 			normalMode = false
 		}
-		continue }
+		break }
 
 		if key == tx.KeyEnter {
 			term.NextLine(1)
 			//term.Print("enter")
-			continue
-		}
-
-		if err != nil {
-			if err == io.EOF {
 			break
 		}
-			log.Fatalf("term.ReadLine(...): %s\n", err)
-		}
+
 		term.Print(
 			aes.ETF("%s", string(key)).
 				Bold().
 				With(aes.EffectRedFG),
 		)
-	}
+	}}
 }
 

tx/term.go

@@ -5,6 +5,13 @@ import "surdeus.su/core/cli/aes"
 import "bufio"
 import "fmt"
 import "os"
+import "os/signal"
+import "syscall"
+
+type Signal = os.Signal
+const (
+	SignalWinChange = syscall.SIGWINCH
+)
 
 type Terminal struct {
 	x *term.Terminal
@@ -12,6 +19,9 @@ type Terminal struct {
 	input *bufio.Reader
 	fd int
 	prevState *term.State
+
+	signals chan Signal
+	keys chan Key
 }
 
 func NewTerminal(input *os.File) (*Terminal, error) {
@@ -33,14 +43,27 @@ func NewTerminal(input *os.File) (*Terminal, error) {
 	return &ret, nil
 }
 
-func (t *Terminal) MakeRaw() error {
+func (t *Terminal) MakeRaw() (chan Key, chan Signal, error) {
 	state, err := term.MakeRaw(t.fd)
 	if err != nil {
-		return err
+		return nil, nil, err
 	}
 
 	t.prevState = state
-	return nil
+	t.signals = make(chan Signal, 1)
+	signal.Notify(
+		t.signals,
+		syscall.SIGWINCH,
+	)
+	t.keys = make(chan Key, 1)
+	go func() {
+		for {
+			r, _, _ := t.input.ReadRune()
+			t.keys <- Key(r)
+		}
+	} ()
+
+	return t.keys, t.signals, nil
 }
 
 func (t *Terminal) Restore() error {
@@ -57,7 +80,7 @@ func (t *Terminal) Restore() error {
 	return nil
 }
 
-func (t *Terminal) GetSize() (int, int, error) {
+func (t *Terminal) Size() (int, int, error) {
 	return term.GetSize(t.fd)
 }
 
@@ -65,10 +88,12 @@ func (t *Terminal) ReadLine() (string, error) {
 	return t.x.ReadLine()
 }
 
+/*
 func (t *Terminal) ReadKey() (Key, int, error) {
 	r, size, err := t.input.ReadRune()
 	return Key(r), size, err
 }
+*/
 
 func (t *Terminal) Write(bts []byte) (int, error) {
 	return t.x.Write(bts)
@@ -102,6 +127,18 @@ func (t *Terminal) MoveCursorDown(n int) {
 	t.Printf(aes.MoveCursorDownFormat, n)
 }
 
+func (t *Terminal) MoveCursorHome() {
+	t.Printf("%s", aes.MoveCursorHome)
+}
+
+func (t *Terminal) SaveCursor() {
+	t.Printf("%s", aes.SaveCursorPositionDEC)
+}
+
+func (t *Terminal) UndoCursor() {
+	t.Printf("%s", aes.UndoCursorPositionDEC)
+}
+
 func (t *Terminal) NextLine(n int) {
 	t.Printf(
 		aes.MoveCursorToBeginOfNextLineDownFormat,
@@ -117,3 +154,6 @@ func (t *Terminal) DisableAltBuffer() {
 	t.Printf("%s", aes.DisableAltBuffer)
 }
 
+func (t *Terminal) ClearScreen() {
+	t.Write([]byte(aes.EraseEntireScreen))
+}