feat(hlgroups): add workaround for winbar background issue (#118)

lua/dropbar/hlgroups.lua

@@ -94,11 +94,48 @@ end
 
 ---Initialize highlight groups for dropbar
 local function init()
+  local groupid = vim.api.nvim_create_augroup('DropBarHlGroups', {})
+
   set_hlgroups()
   vim.api.nvim_create_autocmd('ColorScheme', {
-    group = vim.api.nvim_create_augroup('DropBarHlGroups', {}),
+    group = groupid,
     callback = set_hlgroups,
   })
+
+  -- Remove winbar background as a workaround for
+  -- https://github.com/Bekaboo/dropbar.nvim/issues/118, also see
+  -- https://github.com/neovim/neovim/issues/26037#issuecomment-1838548013
+
+  ---Set WinBar & WinBarNC background to Normal background
+  ---@return nil
+  local function clear_winbar_bg()
+    ---@param name string
+    ---@return nil
+    local function _clear_bg(name)
+      local hl = vim.api.nvim_get_hl(0, { name = name, link = false })
+      if hl.bg or hl.ctermbg then
+        hl.bg = nil
+        hl.ctermbg = nil
+        vim.api.nvim_set_hl(0, name, hl)
+      end
+    end
+
+    _clear_bg('WinBar')
+    _clear_bg('WinBarNC')
+  end
+
+  clear_winbar_bg()
+  vim.api.nvim_create_autocmd('ColorScheme', {
+    desc = 'Remove WinBar background color as a workaround.',
+    group = groupid,
+    callback = clear_winbar_bg,
+  })
+  vim.api.nvim_create_autocmd('OptionSet', {
+    desc = 'Remove WinBar background color as a workaround.',
+    pattern = 'background',
+    group = groupid,
+    callback = clear_winbar_bg,
+  })
 end
 
 return {