capabilities.lua

-- credits to hrsh7th/cmp-nvim-lsp
-- https://raw.githubusercontent.com/hrsh7th/cmp-nvim-lsp/main/lua/cmp_nvim_lsp/init.lua

local M = {}

local if_nil = function(val, default)
  if val == nil then return default end
  return val
end

-- Backported from vim.deprecate (0.9.0+)
local function deprecate(name, alternative, version, plugin, backtrace)
  local message = name .. ' is deprecated'
  plugin = plugin or 'Nvim'
  message = alternative and (message .. ', use ' .. alternative .. ' instead.') or message
  message = message
    .. ' See :h deprecated\nThis function will be removed in '
    .. plugin
    .. ' version '
    .. version
  if vim.notify_once(message, vim.log.levels.WARN) and backtrace ~= false then
    vim.notify(debug.traceback('', 2):sub(2), vim.log.levels.WARN)
  end
end

M.default_capabilities = function(override)
  override = override or {}

  return {
    textDocument = {
      completion = {
        dynamicRegistration = if_nil(override.dynamicRegistration, false),
        completionItem = {
          snippetSupport = if_nil(override.snippetSupport, true),
          commitCharactersSupport = if_nil(override.commitCharactersSupport, true),
          deprecatedSupport = if_nil(override.deprecatedSupport, true),
          preselectSupport = if_nil(override.preselectSupport, true),
          tagSupport = if_nil(override.tagSupport, {
            valueSet = {
              1, -- Deprecated
            }
          }),
          insertReplaceSupport = if_nil(override.insertReplaceSupport, true),
          resolveSupport = if_nil(override.resolveSupport, {
              properties = {
                  "documentation",
                  "detail",
                  "additionalTextEdits",
              },
          }),
          insertTextModeSupport = if_nil(override.insertTextModeSupport, {
            valueSet = {
              1, -- asIs
              2, -- adjustIndentation
            }
          }),
          labelDetailsSupport = if_nil(override.labelDetailsSupport, true),
        },
        contextSupport = if_nil(override.snippetSupport, true),
        insertTextMode = if_nil(override.insertTextMode, 1),
        completionList = if_nil(override.completionList, {
          itemDefaults = {
            'commitCharacters',
            'editRange',
            'insertTextFormat',
            'insertTextMode',
            'data',
          }
        })
      },
    },
  }
end

---Backwards compatibility
M.update_capabilities = function(_, override)
  local _deprecate = vim.deprecate or deprecate
  _deprecate('copilot_cmp.update_capabilities', 'copilot_cmp.default_capabilities', '1.0.0', 'copilot_cmp')
  return M.default_capabilities(override)
end

return M