cli/prompts.ts

@@ -43,39 +43,57 @@ export async function cliPrompt(
 
   render();
 
-  const buf = new Uint8Array(6); // 6 bytes is enough for all the keys
+  const buf = new Uint8Array(64); // large enough for most pastes
   while (true) {
     const n = await Deno.stdin.read(buf);
     if (n === null) break;
-    const [a, b, c] = buf;
 
-    if (a === 3) { // Ctrl+C
-      block?.clear();
-      block?.["layout"]?.clearAll();
-      Deno.stdin.setRaw(false);
-      Deno.exit(130);
-    }
+    for (let i = 0; i < n; i++) {
+      const byte = buf[i];
 
-    if (a === 13) { // Enter
-      break;
-    } else if (a === 127 || a === 8) { // Backspace
-      if (cursorPos > 0) {
-        input.splice(cursorPos - 1, 1);
-        cursorPos--;
+      // Ctrl+C
+      if (byte === 3) {
+        block?.clear();
+        block?.["layout"]?.clearAll();
+        await Deno.stdin.setRaw(false);
+        Deno.exit(130);
       }
-    } else if (a === 46) { // Delete
-      if (cursorPos < input.length) {
+
+      // Escape sequence?
+      if (byte === 27 && i + 1 < n && buf[i + 1] === 91) {
+        const third = buf[i + 2];
+        if (third === 68 && cursorPos > 0) cursorPos--; // Left
+        else if (third === 67 && cursorPos < input.length) cursorPos++; // Right
+        else if (third === 51 && i + 3 < n && buf[i + 3] === 126) { // Delete
+          if (cursorPos < input.length) input.splice(cursorPos, 1);
+          i += 1; // consume tilde
+        }
+        i += 2; // consume ESC [ X
+        continue;
+      }
+
+      // Backspace
+      if (byte === 127 || byte === 8) {
+        if (cursorPos > 0) {
+          input.splice(cursorPos - 1, 1);
+          cursorPos--;
+        }
+        continue;
+      }
+
+      // Delete (ASCII 46)
+      if (byte === 46 && cursorPos < input.length) {
         input.splice(cursorPos, 1);
+        continue;
       }
-    } else if (a === 27 && b === 91) { // Arrow keys
-      if (c === 51 && cursorPos < input.length) { // delete
-        input.splice(cursorPos, 1);
+
+      // Printable
+      if (byte >= 32 && byte <= 126) {
+        input.splice(cursorPos, 0, String.fromCharCode(byte));
+        cursorPos++;
       }
-      if (c === 68 && cursorPos > 0) cursorPos--; // Left
-      if (c === 67 && cursorPos < input.length) cursorPos++; // Right
-    } else if (a >= 32 && a <= 126) { // Printable ASCII
-      input.splice(cursorPos, 0, String.fromCharCode(a));
-      cursorPos++;
+
+      // Other cases: ignore
     }
 
     render();

deno.json

@@ -1,6 +1,6 @@
 {
   "name": "@bearmetal/pdf-tools",
-  "version": "1.0.4",
+  "version": "1.0.5",
   "license": "GPL 3.0",
   "tasks": {
     "dev": "deno run -A --env-file=.env main.ts",