Wired up a pty

frontend/src/main.ts

@@ -1,10 +1,31 @@
 import { Terminal } from "xterm";
 
-const term = new Terminal();
+const term = new Terminal({
+	fontFamily:
+		'"Fira Code", courier-new, courier, monospace, "Powerline Extra Symbols"',
+});
+
+let line = "";
+
+term.onKey(({ key, domEvent }) => {
+	const printable = !(domEvent.altKey || domEvent.ctrlKey || domEvent.metaKey);
+	if (domEvent.key === "Enter") {
+		//@ts-ignore
+		window.__WRITE_PTY(line);
+		term.writeln("");
+		line = "";
+		return;
+	}
+
+	if (printable) {
+		term.write(key);
+		line += key;
+	}
+});
 
 term.open(document.getElementById("terminal")!);
 
 //@ts-ignore
-window.__WRITE_TERMINAL = (data: string) => {
-	term.write(data);
+window.__WRITE_TERMINAL = (data: { result: string }) => {
+	term.write(data.result);
 };

go.mod

@@ -3,3 +3,5 @@ module git.cesium.pw/niku/ratatouille
 go 1.19
 
 require github.com/webview/webview v0.0.0-20230210061304-7b40e46d97e9
+
+require github.com/creack/pty v1.1.18 // indirect

go.sum

@@ -1,2 +1,4 @@
+github.com/creack/pty v1.1.18 h1:n56/Zwd5o6whRC5PMGretI4IdRLlmBXYNjScPaBgsbY=
+github.com/creack/pty v1.1.18/go.mod h1:MOBLtS5ELjhRRrroQr9kyvTxUAFNvYEK993ew/Vr4O4=
 github.com/webview/webview v0.0.0-20230210061304-7b40e46d97e9 h1:SPyWnfToUom3xNh3dKGkq1ZV7pw+VSWDcfVrUM1nRWs=
 github.com/webview/webview v0.0.0-20230210061304-7b40e46d97e9/go.mod h1:rpXAuuHgyEJb6kXcXldlkOjU6y4x+YcASKKXJNUhh0Y=

main.go

@@ -1,25 +1,56 @@
 package main
 
 import (
+	"encoding/json"
+	"fmt"
 	"io/ioutil"
+	"os/exec"
 	"time"
 
+	"github.com/creack/pty"
 	"github.com/webview/webview"
 )
 
+type PtyOutEvent struct {
+	Result string `json:"result"`
+}
+
 func main() {
+	c := exec.Command("bash")
+	p, _ := pty.Start(c)
+
 	w := webview.New(true)
 	defer w.Destroy()
-	w.SetTitle("Basic Example")
+
+	w.SetTitle("Ratatouille")
 	w.SetSize(480, 320, webview.HintNone)
 
 	b, _ := ioutil.ReadFile("frontend/dist/index.html")
 	w.SetHtml(string(b))
 
+	w.Bind("__WRITE_PTY", func(command string) {
+		p.WriteString(command + "\n")
+	})
+
 	go func() {
 		for {
-			time.Sleep(2 * time.Second)
-			w.Eval(`window.__WRITE_TERMINAL('PONG!\r\n');`)
+			buf := make([]byte, 1024)
+			n, _ := p.Read(buf)
+			if n == 0 {
+				continue
+			}
+
+			result := string(buf)
+			event := PtyOutEvent{Result: result[:n]}
+			payload, err := json.Marshal(event)
+			if err != nil {
+				fmt.Println("Whoopsie", err)
+				continue
+			}
+
+			fn := fmt.Sprintf(`window.__WRITE_TERMINAL(%s);`, string(payload))
+			w.Eval(fn)
+			time.Sleep(200 * time.Millisecond)
 		}
 	}()