From 0f988424cfe7f8e010c71485d712759d32392cf8 Mon Sep 17 00:00:00 2001
From: Tyler Lanphear <thisistyg13@gmail.com>
Date: Fri, 8 Jan 2021 01:33:17 -0500
Subject: [PATCH] LibVT: Implement ICH sequence.

---
 Libraries/LibVT/Terminal.cpp | 25 +++++++++++++++++++++++++
 Libraries/LibVT/Terminal.h   |  1 +
 2 files changed, 26 insertions(+)

diff --git a/Libraries/LibVT/Terminal.cpp b/Libraries/LibVT/Terminal.cpp
index 8eafd88d44..75263f26b6 100644
--- a/Libraries/LibVT/Terminal.cpp
+++ b/Libraries/LibVT/Terminal.cpp
@@ -704,6 +704,9 @@ void Terminal::execute_escape_sequence(u8 final)
     case 'n':
         DSR(params);
         break;
+    case '@':
+        ICH(params);
+        break;
     default:
         dbgprintf("Terminal::execute_escape_sequence: Unhandled final '%c'\n", final);
         break;
@@ -821,6 +824,28 @@ void Terminal::DSR(const ParamVector& params)
     }
 }
 
+void Terminal::ICH(const ParamVector& params)
+{
+    int num = 0;
+    if (params.size() >= 1) {
+        num = params[0];
+    }
+    if (num == 0)
+        num = 1;
+
+    auto& line = m_lines[m_cursor_row];
+
+    // Move characters after cursor to the right
+    for (int i = line.length() - num; i >= m_cursor_column; --i)
+        line.set_code_point(i + num, line.code_point(i));
+
+    // Fill n characters after cursor with blanks
+    for (int i = 0; i < num; i++)
+        line.set_code_point(m_cursor_column + i, ' ');
+
+    line.set_dirty(true);
+}
+
 void Terminal::on_input(u8 ch)
 {
 #ifdef TERMINAL_DEBUG
diff --git a/Libraries/LibVT/Terminal.h b/Libraries/LibVT/Terminal.h
index f74459806e..65e276f71d 100644
--- a/Libraries/LibVT/Terminal.h
+++ b/Libraries/LibVT/Terminal.h
@@ -173,6 +173,7 @@ private:
     void IND();
     void RI();
     void DSR(const ParamVector&);
+    void ICH(const ParamVector&);
 
     TerminalClient& m_client;