From f3c9afc684acdc564f76fe1b81dcc3d9b96d291e Mon Sep 17 00:00:00 2001
From: Nathan Byrd <techy1@gmail.com>
Date: Wed, 20 Sep 2023 21:40:59 +0000
Subject: [PATCH] Added F and G

---
 core/ansi_escape_parser.js | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/core/ansi_escape_parser.js b/core/ansi_escape_parser.js
index 8cc4dbb6..55dc9a82 100644
--- a/core/ansi_escape_parser.js
+++ b/core/ansi_escape_parser.js
@@ -28,7 +28,7 @@ function ANSIEscapeParser(options) {
     this.graphicRendition = {};
 
     this.parseState = {
-        re: /(?:\x1b)(?:(?:\x5b([?=;0-9]*?)([ABCDEfHJLmMsSTuUYZ]))|([78DEHM]))/g, //  eslint-disable-line no-control-regex
+        re: /(?:\x1b)(?:(?:\x5b([?=;0-9]*?)([ABCDEFGfHJLmMsSTuUYZ]))|([78DEHM]))/g, //  eslint-disable-line no-control-regex
     };
 
     options = miscUtil.valueWithDefault(options, {
@@ -266,7 +266,7 @@ function ANSIEscapeParser(options) {
         self.parseState = {
             //  ignore anything past EOF marker, if any
             buffer: input.split(String.fromCharCode(0x1a), 1)[0],
-            re: /(?:\x1b)(?:(?:\x5b([?=;0-9]*?)([ABCDEfHJLmMsSTuUYZ]))|([78DEHM]))/g, //  eslint-disable-line no-control-regex
+            re: /(?:\x1b)(?:(?:\x5b([?=;0-9]*?)([ABCDEFGfHJLmMsSTuUYZ]))|([78DEHM]))/g, //  eslint-disable-line no-control-regex
             stop: false,
         };
     };
@@ -425,6 +425,25 @@ function ANSIEscapeParser(options) {
                 }
                 break;
 
+            // reverse line feed
+            case 'F':
+                arg = isNaN(args[0]) ? 1 : args[0];
+                if(this.row - arg < 1) {
+                    this.emit('scroll', -(arg - this.row));
+                    self.moveCursor(0, 1 - this.row);
+                }
+                else {
+                    self.moveCursor(0, -arg);
+                }
+                break;
+
+            // absolute horizontal cursor position
+            case 'G':
+                arg = isNaN(args[0]) ? 1 : args[0];
+                self.column = Math.max(1, arg);
+                self.positionUpdated();
+                break;
+
             case 'f': //  horiz & vertical
             case 'H': //  cursor position
                 //self.row  = args[0] || 1;