From 21617a9d602f2400c8e9813490958e106cb88ca8 Mon Sep 17 00:00:00 2001
From: dotfrag <17456867+dotfrag@users.noreply.github.com>
Date: Mon, 10 Jun 2024 23:06:09 +0300
Subject: [PATCH] feat(lualine): show readonly icon (#3567)

Adds a configurable lock icon when a file is opened as read only. Mimics
`vi -R <file>` status line.
---
 lua/lazyvim/util/lualine.lua | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/lua/lazyvim/util/lualine.lua b/lua/lazyvim/util/lualine.lua
index 3e546873..aad22677 100644
--- a/lua/lazyvim/util/lualine.lua
+++ b/lua/lazyvim/util/lualine.lua
@@ -72,7 +72,7 @@ function M.format(component, text, hl_group)
   return component:format_hl(lualine_hl_group) .. text .. component:get_default_hl()
 end
 
----@param opts? {relative: "cwd"|"root", modified_hl: string?, directory_hl: string?, filename_hl: string?}
+---@param opts? {relative: "cwd"|"root", modified_hl: string?, directory_hl: string?, filename_hl: string?, modified_sign: string?, readonly_icon: string?, length: number?}
 function M.pretty_path(opts)
   opts = vim.tbl_extend("force", {
     relative = "cwd",
@@ -80,6 +80,7 @@ function M.pretty_path(opts)
     directory_hl = "",
     filename_hl = "Bold",
     modified_sign = "",
+    readonly_icon = " 󰌾 ",
     length = 3,
   }, opts or {})
 
@@ -120,7 +121,12 @@ function M.pretty_path(opts)
       dir = table.concat({ unpack(parts, 1, #parts - 1) }, sep)
       dir = M.format(self, dir .. sep, opts.directory_hl)
     end
-    return dir .. parts[#parts]
+
+    local readonly = ""
+    if vim.bo.readonly then
+      readonly = M.format(self, opts.readonly_icon, opts.modified_hl)
+    end
+    return dir .. parts[#parts] .. readonly
   end
 end