readline: fix key name for function keys with modifiers

Fixes: #35251

PR-URL: #35268
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

Author: elie-g

lib/internal/readline/utils.js

@@ -199,7 +199,13 @@ function* emitKeys(stream) {
 
       // Parse the key itself
       switch (code) {
-        /* xterm/gnome ESC O letter */
+        /* xterm/gnome ESC [ letter (with modifier) */
+        case '[P': key.name = 'f1'; break;
+        case '[Q': key.name = 'f2'; break;
+        case '[R': key.name = 'f3'; break;
+        case '[S': key.name = 'f4'; break;
+
+        /* xterm/gnome ESC O letter (without modifier) */
         case 'OP': key.name = 'f1'; break;
         case 'OQ': key.name = 'f2'; break;
         case 'OR': key.name = 'f3'; break;
@@ -296,12 +302,15 @@ function* emitKeys(stream) {
     } else if (ch === '\r') {
       // carriage return
       key.name = 'return';
+      key.meta = escaped;
     } else if (ch === '\n') {
       // Enter, should have been called linefeed
       key.name = 'enter';
+      key.meta = escaped;
     } else if (ch === '\t') {
       // tab
       key.name = 'tab';
+      key.meta = escaped;
     } else if (ch === '\b' || ch === '\x7f') {
       // backspace or ctrl+h
       key.name = 'backspace';

test/parallel/test-readline-keys.js

@@ -92,10 +92,13 @@ addTest('io.JS', [
 ]);
 
 // Named characters
-addTest('\n\r\t', [
+addTest('\n\r\t\x1b\n\x1b\r\x1b\t', [
   { name: 'enter', sequence: '\n' },
   { name: 'return', sequence: '\r' },
   { name: 'tab', sequence: '\t' },
+  { name: 'enter', sequence: '\x1b\n', meta: true },
+  { name: 'return', sequence: '\x1b\r', meta: true },
+  { name: 'tab', sequence: '\x1b\t', meta: true },
 ]);
 
 // Space and backspace
@@ -132,6 +135,25 @@ addTest('a\x1baA\x1bA', [
   { name: 'a', sequence: '\x1bA', meta: true, shift: true },
 ]);
 
+// xterm/gnome ESC [ letter (with modifiers)
+/* eslint-disable max-len */
+addTest('\x1b[2P\x1b[3P\x1b[4P\x1b[5P\x1b[6P\x1b[7P\x1b[8P\x1b[3Q\x1b[8Q\x1b[3R\x1b[8R\x1b[3S\x1b[8S', [
+  { name: 'f1', sequence: '\x1b[2P', code: '[P', shift: true, meta: false, ctrl: false },
+  { name: 'f1', sequence: '\x1b[3P', code: '[P', shift: false, meta: true, ctrl: false },
+  { name: 'f1', sequence: '\x1b[4P', code: '[P', shift: true, meta: true, ctrl: false },
+  { name: 'f1', sequence: '\x1b[5P', code: '[P', shift: false, meta: false, ctrl: true },
+  { name: 'f1', sequence: '\x1b[6P', code: '[P', shift: true, meta: false, ctrl: true },
+  { name: 'f1', sequence: '\x1b[7P', code: '[P', shift: false, meta: true, ctrl: true },
+  { name: 'f1', sequence: '\x1b[8P', code: '[P', shift: true, meta: true, ctrl: true },
+  { name: 'f2', sequence: '\x1b[3Q', code: '[Q', meta: true },
+  { name: 'f2', sequence: '\x1b[8Q', code: '[Q', shift: true, meta: true, ctrl: true },
+  { name: 'f3', sequence: '\x1b[3R', code: '[R', meta: true },
+  { name: 'f3', sequence: '\x1b[8R', code: '[R', shift: true, meta: true, ctrl: true },
+  { name: 'f4', sequence: '\x1b[3S', code: '[S', meta: true },
+  { name: 'f4', sequence: '\x1b[8S', code: '[S', shift: true, meta: true, ctrl: true },
+]);
+/* eslint-enable max-len */
+
 // xterm/gnome ESC O letter
 addTest('\x1bOP\x1bOQ\x1bOR\x1bOS', [
   { name: 'f1', sequence: '\x1bOP', code: 'OP' },