feat: terminal now resize appropriately

frontend/components/editor/terminals/terminal.tsx

@@ -1,12 +1,13 @@
-"use client";
+"use client"
 
-import { Terminal } from "@xterm/xterm";
-import { FitAddon } from "@xterm/addon-fit";
-import "./xterm.css";
+import { Terminal } from "@xterm/xterm"
+import { FitAddon } from "@xterm/addon-fit"
+import "./xterm.css"
 
-import { useEffect, useRef, useState } from "react";
-import { Socket } from "socket.io-client";
-import { Loader2 } from "lucide-react";
+import { ElementRef, useEffect, useRef, useState } from "react"
+import { Socket } from "socket.io-client"
+import { Loader2 } from "lucide-react"
+import { debounce } from "@/lib/utils"
 
 export default function EditorTerminal({
   socket,
@@ -15,16 +16,17 @@ export default function EditorTerminal({
   setTerm,
   visible,
 }: {
-  socket: Socket;
-  id: string;
-  term: Terminal | null;
-  setTerm: (term: Terminal) => void;
-  visible: boolean;
+  socket: Socket
+  id: string
+  term: Terminal | null
+  setTerm: (term: Terminal) => void
+  visible: boolean
 }) {
-  const terminalRef = useRef(null);
+  const terminalRef = useRef<ElementRef<"div">>(null)
+  const fitAddonRef = useRef<FitAddon | null>(null)
 
   useEffect(() => {
-    if (!terminalRef.current) return;
+    if (!terminalRef.current) return
     // console.log("new terminal", id, term ? "reusing" : "creating");
 
     const terminal = new Terminal({
@@ -36,56 +38,80 @@ export default function EditorTerminal({
       fontSize: 14,
       lineHeight: 1.5,
       letterSpacing: 0,
-    });
+    })
 
-    setTerm(terminal);
-
-    return () => {
-      if (terminal) terminal.dispose();
-    };
-  }, []);
+    setTerm(terminal)
+    const dispose = () => {
+      terminal.dispose()
+    }
+    return dispose
+  }, [])
 
   useEffect(() => {
-    if (!term) return;
+    if (!term) return
 
-    if (!terminalRef.current) return;
-    const fitAddon = new FitAddon();
-    term.loadAddon(fitAddon);
-    term.open(terminalRef.current);
-    fitAddon.fit();
+    if (!terminalRef.current) return
+    if (!fitAddonRef.current) {
+      const fitAddon = new FitAddon()
+      term.loadAddon(fitAddon)
+      term.open(terminalRef.current)
+      fitAddon.fit()
+      fitAddonRef.current = fitAddon
+    }
 
     const disposableOnData = term.onData((data) => {
-      socket.emit("terminalData", id, data);
-    });
+      socket.emit("terminalData", id, data)
+    })
 
     const disposableOnResize = term.onResize((dimensions) => {
-      // const terminal_size = {
-      //   width: dimensions.cols,
-      //   height: dimensions.rows,
-      // };
-      fitAddon.fit();
-      socket.emit("terminalResize", dimensions);
-    });
+      fitAddonRef.current?.fit()
+      socket.emit("terminalResize", dimensions)
+    })
+    const resizeObserver = new ResizeObserver(
+      debounce((entries) => {
+        if (!fitAddonRef.current || !terminalRef.current) return
 
+        const entry = entries[0]
+        if (!entry) return
+
+        const { width, height } = entry.contentRect
+
+        // Only call fit if the size has actually changed
+        if (
+          width !== terminalRef.current.offsetWidth ||
+          height !== terminalRef.current.offsetHeight
+        ) {
+          try {
+            fitAddonRef.current.fit()
+          } catch (err) {
+            console.error("Error during fit:", err)
+          }
+        }
+      }, 50) // Debounce for 50ms
+    )
+
+    // start observing for resize
+    resizeObserver.observe(terminalRef.current)
     return () => {
-      disposableOnData.dispose();
-      disposableOnResize.dispose();
-    };
-  }, [term, terminalRef.current]);
+      disposableOnData.dispose()
+      disposableOnResize.dispose()
+      resizeObserver.disconnect()
+    }
+  }, [term, terminalRef.current])
 
   useEffect(() => {
-    if (!term) return;  
+    if (!term) return
     const handleTerminalResponse = (response: { id: string; data: string }) => {
       if (response.id === id) {
-        term.write(response.data);
+        term.write(response.data)
       }
-    };
-    socket.on("terminalResponse", handleTerminalResponse);
-  
+    }
+    socket.on("terminalResponse", handleTerminalResponse)
+
     return () => {
-      socket.off("terminalResponse", handleTerminalResponse);
-    };
-  }, [term, id, socket]);
+      socket.off("terminalResponse", handleTerminalResponse)
+    }
+  }, [term, id, socket])
 
   return (
     <>
@@ -102,5 +128,5 @@ export default function EditorTerminal({
         ) : null}
       </div>
     </>
-  );
+  )
 }