feat: Allow setting line numbers / relative numbers

Closes #31

README.md

@@ -29,6 +29,8 @@ vim.g.symbols_outline = {
     show_guides = true,
     auto_preview = true,
     position = 'right',
+    show_numbers = false,
+    show_relative_numbers = false,
     keymaps = {
         close = "<Esc>",
         goto_location = "<Cr>",
@@ -49,6 +51,8 @@ let g:symbols_outline = {
     \ "show_guides": v:true,
     \ "position": 'right',
     \ "auto_preview": v:true,
+    \ "show_numbers": v:false,
+    \ "show_relative_numbers": v:false,
     \ "keymaps": {
         \ "close": "<Esc>",
         \ "goto_location": "<Cr>",
@@ -67,6 +71,8 @@ let g:symbols_outline = {
 | show_guides            | Wether to show outline guides                                      | boolean            | true                     |
 | position               | Where to open the split window                                     | 'right' or 'left'  | 'right'                  |
 | auto_preview           | Show a preview of the code on hover                                | boolean            | true                     |
+| show_numbers           | Shows numbers with the outline                                     | boolean            | false                    |
+| show_relative_numbers  | Shows relative numbers with the outline                            | boolean            | false                    |
 | keymaps                | Which keys do what                                                 | table (dictionary) | [here](#default-keymaps) |
 | lsp_blacklist          | Which lsp clients to ignore                                        | table (array)      | {}                       |
 

lua/symbols-outline.lua

@@ -194,6 +194,14 @@ local function setup_buffer()
     vim.api.nvim_buf_set_name(M.state.outline_buf, "OUTLINE")
     vim.api.nvim_buf_set_option(M.state.outline_buf, "filetype", "Outline")
     vim.api.nvim_buf_set_option(M.state.outline_buf, "modifiable", false)
+
+    if config.options.show_numbers or config.options.show_relative_numbers then
+        vim.api.nvim_win_set_option(M.state.outline_win, "nu", true)
+    end
+
+    if config.options.show_relative_numbers then
+        vim.api.nvim_win_set_option(M.state.outline_win, "rnu", true)
+    end
 end
 
 local function handler(response)

lua/symbols-outline/config.lua

@@ -7,6 +7,8 @@ local defaults = {
     show_guides = true,
     position = 'right',
     auto_preview = true,
+    show_numbers = false,
+    show_relative_numbers = false,
     keymaps = {
         close = "<Esc>",
         goto_location = "<Cr>",
@@ -20,6 +22,10 @@ local defaults = {
 
 M.options = {}
 
+function M.has_numbers()
+   return M.options.show_numbers or M.options.show_relative_numbers
+end
+
 function M.get_position_navigation_direction()
     if M.options.position == 'left' then
         return 'h'

lua/symbols-outline/preview.lua

@@ -29,6 +29,10 @@ local function get_offset()
     local width = 53
     local height = 0
 
+    if config.has_numbers() then
+       width = width + 4;
+    end
+
     if config.options.position == 'right' then
         width = 0 - width
     else