feat: add fixed width option

closes #79

README.md

@@ -32,6 +32,7 @@ vim.g.symbols_outline = {
     show_guides = true,
     auto_preview = true,
     position = 'right',
+    relative_width = true,
     width = 25,
     show_numbers = false,
     show_relative_numbers = false,

doc/symbols-outline.txt

@@ -123,10 +123,21 @@ position
 
     Type: 'right' or 'left'
 
+-----------------------------------------------------------------------------
+relative_width
+
+    Whether the width of the window is relative to the current split or an
+    absolute width
+
+    Default: true                                                            ~
+
+    Type: boolean
+
 -----------------------------------------------------------------------------
 width
 
-    How big the window is (relative to the current split)
+    Width of the window as a percentage of the current split
+    (`relative_width `= true) or as number of columns (`relative_width `= false)
 
     Default: 25                                                            ~
 

lua/symbols-outline/config.lua

@@ -6,6 +6,7 @@ M.defaults = {
     highlight_hovered_item = true,
     show_guides = true,
     position = 'right',
+    relative_width = true,
     width = 25,
     auto_preview = true,
     show_numbers = false,
@@ -68,7 +69,15 @@ function M.get_position_navigation_direction()
     end
 end
 
-function M.get_width_percentage() return M.options.width / 100 end
+function M.get_window_width()
+  if M.options.relative_width then
+    -- local current_win_width = vim.api.nvim_win_get_width(0)
+    return math.ceil(vim.api.nvim_win_get_width(0) * (M.options.width / 100))
+  else
+    return M.options.width
+  end
+end
+
 
 function M.get_split_command()
     if M.options.position == 'left' then

lua/symbols-outline/view.lua

@@ -11,15 +11,10 @@ function M.setup_view()
 
     -- delete buffer when window is closed / buffer is hidden
     vim.api.nvim_buf_set_option(bufnr, "bufhidden", "delete")
-
-    local current_win = vim.api.nvim_get_current_win()
-    local current_win_width = vim.api.nvim_win_get_width(current_win)
-
     -- create a split
     vim.cmd(config.get_split_command())
     -- resize to a % of the current window size
-    vim.cmd("vertical resize " ..
-                math.ceil(current_win_width * config.get_width_percentage()))
+    vim.cmd("vertical resize " .. config.get_window_width())
 
     -- get current (outline) window and attach our buffer to it
     local winnr = vim.api.nvim_get_current_win()