From 4f4f659fe62eb62136a6ab421c297cfcaa420e25 Mon Sep 17 00:00:00 2001
From: Jakub Jankiewicz <jcubic@onet.pl>
Date: Sat, 18 Mar 2023 18:09:47 +0100
Subject: [PATCH] readline: add paste bracket mode

The paste bracket mode allows REPL to have auto-indentation
that is handled differently when the user copy-pastes the code
from the clipboard and the code already has an indentation.

PR-URL: https://github.com/nodejs/node/pull/47150
Fixes: https://github.com/nodejs/node/issues/45213
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Kohei Ueno <kohei.ueno119@gmail.com>
---
 lib/internal/readline/utils.js | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/lib/internal/readline/utils.js b/lib/internal/readline/utils.js
index a546516d76b66c..124a5382a0ddae 100644
--- a/lib/internal/readline/utils.js
+++ b/lib/internal/readline/utils.js
@@ -148,8 +148,10 @@ function* emitKeys(stream) {
          *
          *  - `;5` part is optional, e.g. it could be `\x1b[24~`
          *  - first part can contain one or two digits
+         *  - there is also special case when there can be 3 digits
+         *    but without modifier. They are the case of paste bracket mode
          *
-         * So the generic regexp is like /^\d\d?(;\d)?[~^$]$/
+         * So the generic regexp is like /^(?:\d\d?(;\d)?[~^$]|\d{3}~)$/
          *
          *
          * 2. `\x1b[1;5H` should be parsed as { code: '[H', modifier: 5 }
@@ -170,6 +172,10 @@ function* emitKeys(stream) {
 
           if (ch >= '0' && ch <= '9') {
             s += (ch = yield);
+
+            if (ch >= '0' && ch <= '9') {
+              s += (ch = yield);
+            }
           }
         }
 
@@ -189,9 +195,13 @@ function* emitKeys(stream) {
         const cmd = StringPrototypeSlice(s, cmdStart);
         let match;
 
-        if ((match = RegExpPrototypeExec(/^(\d\d?)(;(\d))?([~^$])$/, cmd))) {
-          code += match[1] + match[4];
-          modifier = (match[3] || 1) - 1;
+        if ((match = RegExpPrototypeExec(/^(?:(\d\d?)(?:;(\d))?([~^$])|(\d{3}~))$/, cmd))) {
+          if (match[4]) {
+            code += match[4];
+          } else {
+            code += match[1] + match[3];
+            modifier = (match[2] || 1) - 1;
+          }
         } else if (
           (match = RegExpPrototypeExec(/^((\d;)?(\d))?([A-Za-z])$/, cmd))
         ) {
@@ -228,6 +238,10 @@ function* emitKeys(stream) {
         case '[13~': key.name = 'f3'; break;
         case '[14~': key.name = 'f4'; break;
 
+        /* paste bracket mode */
+        case '[200~': key.name = 'paste-start'; break;
+        case '[201~': key.name = 'paste-end'; break;
+
         /* from Cygwin and used in libuv */
         case '[[A': key.name = 'f1'; break;
         case '[[B': key.name = 'f2'; break;