[mini.statusline] CoC diagnostics

[wroyca]

Here's a little helper to have CoC Diagnostics in mini.statusline:

local set_default_hl = function(name, data)
  data.default = true
  vim.api.nvim_set_hl(0, name, data)
end

set_default_hl('MiniStatuslineDiagnosticError', { link = 'DiagnosticError' })
set_default_hl('MiniStatuslineDiagnosticHint',  { link = 'DiagnosticHint' })
set_default_hl('MiniStatuslineDiagnosticInfo',  { link = 'DiagnosticInfo' })
set_default_hl('MiniStatuslineDiagnosticWarn',  { link = 'DiagnosticWarn' })

local severities = {
  error = { symbol = "E", hl_group = "MiniStatuslineDiagnosticError" },
  hint = { symbol = "H", hl_group = "MiniStatuslineDiagnosticHint" },
  information = { symbol = "I", hl_group = "MiniStatuslineDiagnosticInfo" },
  warning = { symbol = "W", hl_group = "MiniStatuslineDiagnosticWarn" },
}

local section_diagnostics = function(args)
  if MiniStatusline.is_truncated(args.trunc_width) then return '' end

  local count = vim.b.coc_diagnostic_info or {}
  local diagnostics_list = {}
  for severity, info in pairs(severities) do
    local n = count[severity] or 0
    if n > 0 then
      table.insert(diagnostics_list, ("%%#%s#%s%d"):format(info.hl_group, info.symbol, n))
    end
  end
  if #diagnostics_list == 0 then return '' end

  return table.concat(diagnostics_list, " ")
end

[echasnovski]

Nice! Couple of observations:

• All the code from local set_default_hl up to (not including) local _, count is better moved to an outer scope (for example, before defining section function).
• The count computation behind pcall() is not really necessary. I'd just use local count = vim.b.coc_diagnostic_info or {}.

[wroyca]

Thank! Updated