From 474c38a27292fed631886630daf2c6626bc53e9e Mon Sep 17 00:00:00 2001
From: Youwen Wu <youwenw@gmail.com>
Date: Fri, 1 Nov 2024 13:54:16 -0700
Subject: [PATCH] feat: remove padding from kitty terminal on startup

---
 init.lua                      |  1 +
 lua/scripts/kitty-padding.lua | 58 +++++++++++++++++++++++++++++++++++
 2 files changed, 59 insertions(+)
 create mode 100644 lua/scripts/kitty-padding.lua

diff --git a/init.lua b/init.lua
index 89201ae..91d7ae3 100644
--- a/init.lua
+++ b/init.lua
@@ -29,6 +29,7 @@ vim.opt.scrolloff = 10
 
 if os.getenv("TERM") == "xterm-kitty" then
   require("scripts.chameleon").setup()
+  require("scripts.kitty-padding").setup()
 end
 
 vim.cmd.colorscheme("rose-pine")
diff --git a/lua/scripts/kitty-padding.lua b/lua/scripts/kitty-padding.lua
new file mode 100644
index 0000000..6961fc7
--- /dev/null
+++ b/lua/scripts/kitty-padding.lua
@@ -0,0 +1,58 @@
+-- remove padding from kitty terminal when entering vim
+
+local M = {}
+
+local fn = vim.fn
+local api = vim.api
+
+local autocmd = api.nvim_create_autocmd
+local autogroup = api.nvim_create_augroup
+
+local no_padding = function(sync)
+  local command = "kitty @ set-spacing padding-h=0 padding-bottom=0"
+  if not sync then
+    fn.jobstart(command, {
+      on_stderr = function(_, d, _)
+        if #d > 1 then
+          api.nvim_err_writeln("Error setting window padding. Make sure kitty remote control is turned on.")
+        end
+      end,
+    })
+  else
+    fn.system(command)
+  end
+end
+
+local restore_padding = function(sync)
+  local command = "kitty @ set-spacing padding=default"
+  if not sync then
+    fn.jobstart(command, {
+      on_stderr = function(_, d, _)
+        if #d > 1 then
+          api.nvim_err_writeln("Error setting window padding. Make sure kitty remote control is turned on.")
+        end
+      end,
+    })
+  else
+    fn.system(command)
+  end
+end
+
+M.setup = function()
+  autocmd({ "VimResume", "VimEnter" }, {
+    pattern = "*",
+    callback = function()
+      no_padding()
+    end,
+    group = autogroup("SpacingRemove", { clear = true }),
+  })
+
+  autocmd({ "VimLeavePre", "VimSuspend" }, {
+    callback = function()
+      restore_padding(true)
+    end,
+    group = autogroup("SpacingRestore", { clear = true }),
+  })
+end
+
+return M