Add support for bufferline

lua/hardline/common.lua

@@ -1,4 +1,4 @@
-local cmd, fn, vim = vim.cmd, vim.fn, vim
+local cmd, fn = vim.cmd, vim.fn
 local g = vim.g
 local M = {}
 
@@ -27,14 +27,30 @@ function M.is_active()
   return g.statusline_winid == fn.win_getid()
 end
 
-function M.get_state(class)
-  if class == 'mode' and M.is_active() then
+function M.get_state(section)
+  if section.class == 'mode' and M.is_active() then
     local mode = M.modes[fn.mode()] or M.modes['?']
     return mode.state
   end
+  if section.class == 'bufferline' then
+    if section.conceal then return 'conceal' end
+    local state = {}
+    table.insert(state, section.current and 'current' or 'background')
+    if section.modified then table.insert(state, 'modified') end
+    return table.concat(state, '_')
+  end
   return M.is_active() and 'active' or 'inactive'
 end
 
+function M.color(section)
+  if type(section) ~= 'table' then return section end
+  if section.class == 'none' then return section.item end
+  local state = M.get_state(section)
+  local hlgroup = string.format('Hardline_%s_%s', section.class, state)
+  if fn.hlexists(hlgroup) == 0 then return section.item end
+  return string.format('%%#%s#%s%%*', hlgroup, section.item)
+end
+
 function M.set_cache(augroup)
   cmd(string.format('augroup %s', augroup))
   cmd('autocmd!')