From af78a2d08059de7084cff28736e9d834ceb2cb9e Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Thu, 1 Aug 2024 22:08:46 +0300
Subject: [PATCH] Kernel: Implement ANSI CSI L for TTY

vim seems to be using this, so I decided its needed
---
 kernel/kernel/Terminal/VirtualTTY.cpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/kernel/kernel/Terminal/VirtualTTY.cpp b/kernel/kernel/Terminal/VirtualTTY.cpp
index caa8fea4e1..00d58f0410 100644
--- a/kernel/kernel/Terminal/VirtualTTY.cpp
+++ b/kernel/kernel/Terminal/VirtualTTY.cpp
@@ -242,6 +242,23 @@ namespace Kernel
 				else
 					dprintln("Unsupported ANSI CSI character K");
 				return reset_ansi();
+			case 'L': // Insert Line
+				if (m_ansi_state.nums[0] == -1)
+					m_ansi_state.nums[0] = 1;
+				for (uint32_t y_off = 0; y_off < (uint32_t)m_ansi_state.nums[0]; y_off++)
+				{
+					const uint32_t src_y = m_row + y_off;
+					const uint32_t dst_y = src_y + m_ansi_state.nums[0];
+					if (dst_y < m_height)
+					{
+						memcpy(&m_buffer[dst_y * m_width], &m_buffer[src_y * m_width], m_width * sizeof(Cell));
+						for (uint32_t x = 0; x < m_width; x++)
+							render_from_buffer(x, dst_y);
+					}
+					for (uint32_t x = 0; x < m_width; x++)
+						putchar_at(' ', x, src_y);
+				}
+				return reset_ansi();
 			case 'S': // Scroll Up
 				dprintln("Unsupported ANSI CSI character S");
 				return reset_ansi();