fix: scrollbar gutter not updating on window resize

Author: Saghen

lua/blink/cmp/windows/lib/scrollbar/geometry.lua

@@ -29,7 +29,7 @@ local function get_win_buf_height(target_win)
 end
 
 --- @param target_win number
---- @return { should_hide: boolean, thumb: blink.cmp.ScrollbarGeometry, gutter: blink.cmp.ScrollbarGeometry }
+--- @return { should_hide_thumb: boolean, thumb: blink.cmp.ScrollbarGeometry, gutter: blink.cmp.ScrollbarGeometry }
 function M.get_geometry(target_win)
   local width = vim.api.nvim_win_get_width(target_win)
   local height = vim.api.nvim_win_get_height(target_win)
@@ -52,7 +52,7 @@ function M.get_geometry(target_win)
   }
 
   return {
-    should_hide = height >= buf_height,
+    should_hide_thumb = height >= buf_height,
     thumb = vim.tbl_deep_extend('force', common_geometry, { height = thumb_height, zindex = zindex + 2 }),
     gutter = vim.tbl_deep_extend('force', common_geometry, { row = 0, height = height, zindex = zindex + 1 }),
   }

lua/blink/cmp/windows/lib/scrollbar/init.lua

@@ -40,10 +40,12 @@ function scrollbar:mount(target_win)
     if not vim.api.nvim_win_is_valid(target_win) then return self:unmount() end
 
     local updated_geometry = require('blink.cmp.windows.lib.scrollbar.geometry').get_geometry(target_win)
-    if updated_geometry.should_hide then return self.win:hide_thumb() end
-
-    self.win:show_thumb(updated_geometry.thumb)
     self.win:show_gutter(updated_geometry.gutter)
+    if updated_geometry.should_hide_thumb then
+      self.win:hide_thumb()
+    else
+      self.win:show_thumb(updated_geometry.thumb)
+    end
   end
   -- HACK: for some reason, the autocmds don't fire on the initial mount
   -- so we apply after on the next event loop iteration after the windows are definitely setup