LunarVim/lua/lsp/init.lua

local lsp_config = {}

vim.fn.sign_define(
  "LspDiagnosticsSignError",
  { texthl = "LspDiagnosticsSignError", text = "", numhl = "LspDiagnosticsSignError" }
)
vim.fn.sign_define(
  "LspDiagnosticsSignWarning",
  { texthl = "LspDiagnosticsSignWarning", text = "", numhl = "LspDiagnosticsSignWarning" }
)
vim.fn.sign_define(
  "LspDiagnosticsSignHint",
  { texthl = "LspDiagnosticsSignHint", text = "", numhl = "LspDiagnosticsSignHint" }
)
vim.fn.sign_define(
  "LspDiagnosticsSignInformation",
  { texthl = "LspDiagnosticsSignInformation", text = "", numhl = "LspDiagnosticsSignInformation" }
)

-- local opts = { border = "single" }
-- TODO revisit this
-- local border = {
--   { "🭽", "FloatBorder" },
--   { "▔", "FloatBorder" },
--   { "🭾", "FloatBorder" },
--   { "▕", "FloatBorder" },
--   { "🭿", "FloatBorder" },
--   { "▁", "FloatBorder" },
--   { "🭼", "FloatBorder" },
--   { "▏", "FloatBorder" },
-- }

-- My font didn't like this :/
-- vim.api.nvim_set_keymap(
--   "n",
--   "gl",
--   '<cmd>lua vim.lsp.diagnostic.show_line_diagnostics({ show_header = false, border = { { "🭽", "FloatBorder" }, { "▔", "FloatBorder" }, { "🭾", "FloatBorder" }, { "▕", "FloatBorder" }, { "🭿", "FloatBorder" }, { "▁", "FloatBorder" }, { "🭼", "FloatBorder" }, { "▏", "FloatBorder" }, } })<CR>',
--   { noremap = true, silent = true }
-- )

function lsp_config.setup_default_bindings()
  if lvim.lsp.default_keybinds then
    vim.cmd "nnoremap <silent> gd <cmd>lua vim.lsp.buf.definition()<CR>"
    vim.cmd "nnoremap <silent> gD <cmd>lua vim.lsp.buf.declaration()<CR>"
    vim.cmd "nnoremap <silent> gr <cmd>lua vim.lsp.buf.references()<CR>"
    vim.cmd "nnoremap <silent> gi <cmd>lua vim.lsp.buf.implementation()<CR>"
    vim.api.nvim_set_keymap(
      "n",
      "gl",
      '<cmd>lua vim.lsp.diagnostic.show_line_diagnostics({ show_header = false, border = "single" })<CR>',
      { noremap = true, silent = true }
    )

    vim.cmd "nnoremap <silent> gp <cmd>lua require'lsp'.PeekDefinition()<CR>"
    vim.cmd "nnoremap <silent> K :lua vim.lsp.buf.hover()<CR>"
    vim.cmd "nnoremap <silent> <C-p> :lua vim.lsp.diagnostic.goto_prev({popup_opts = {border = lvim.lsp.popup_border}})<CR>"
    vim.cmd "nnoremap <silent> <C-n> :lua vim.lsp.diagnostic.goto_next({popup_opts = {border = lvim.lsp.popup_border}})<CR>"
    -- vim.cmd "nnoremap <silent> <tab> <cmd>lua vim.lsp.buf.signature_help()<CR>"
    -- scroll down hover doc or scroll in definition preview
    -- scroll up hover doc
    vim.cmd 'command! -nargs=0 LspVirtualTextToggle lua require("lsp/virtual_text").toggle()'
  end
end

-- Set Default Prefix.
-- Note: You can set a prefix per lsp server in the lv-globals.lua file
function lsp_config.setup_handlers()
  vim.lsp.handlers["textDocument/publishDiagnostics"] = vim.lsp.with(vim.lsp.diagnostic.on_publish_diagnostics, {
    virtual_text = lvim.lsp.diagnostics.virtual_text,
    signs = lvim.lsp.diagnostics.signs,
    underline = lvim.lsp.document_highlight,
  })

  vim.lsp.handlers["textDocument/hover"] = vim.lsp.with(vim.lsp.handlers.hover, {
    border = lvim.lsp.popup_border,
  })

  vim.lsp.handlers["textDocument/signatureHelp"] = vim.lsp.with(vim.lsp.handlers.signature_help, {
    border = lvim.lsp.popup_border,
  })
end

-- symbols for autocomplete
vim.lsp.protocol.CompletionItemKind = {
  "   (Text) ",
  "   (Method)",
  "   (Function)",
  "   (Constructor)",
  " ﴲ  (Field)",
  "[] (Variable)",
  "   (Class)",
  " ﰮ  (Interface)",
  "   (Module)",
  " 襁 (Property)",
  "   (Unit)",
  "   (Value)",
  " 練 (Enum)",
  "   (Keyword)",
  "   (Snippet)",
  "   (Color)",
  "   (File)",
  "   (Reference)",
  "   (Folder)",
  "   (EnumMember)",
  " ﲀ  (Constant)",
  " ﳤ  (Struct)",
  "   (Event)",
  "   (Operator)",
  "   (TypeParameter)",
}

--[[ " autoformat
autocmd BufWritePre *.js lua vim.lsp.buf.formatting_sync(nil, 100)
autocmd BufWritePre *.jsx lua vim.lsp.buf.formatting_sync(nil, 100)
autocmd BufWritePre *.lua lua vim.lsp.buf.formatting_sync(nil, 100) ]]
-- Java
-- autocmd FileType java nnoremap ca <Cmd>lua require('jdtls').code_action()<CR>

local function lsp_highlight_document(client)
  if lvim.lsp.document_highlight == false then
    return -- we don't need further
  end
  -- Set autocommands conditional on server_capabilities
  if client.resolved_capabilities.document_highlight then
    vim.api.nvim_exec(
      [[
      hi LspReferenceRead cterm=bold ctermbg=red guibg=#464646
      hi LspReferenceText cterm=bold ctermbg=red guibg=#464646
      hi LspReferenceWrite cterm=bold ctermbg=red guibg=#464646
      augroup lsp_document_highlight
        autocmd! * <buffer>
        autocmd CursorHold <buffer> lua vim.lsp.buf.document_highlight()
        autocmd CursorMoved <buffer> lua vim.lsp.buf.clear_references()
      augroup END
    ]],
      false
    )
  end
end

-- Taken from https://www.reddit.com/r/neovim/comments/gyb077/nvimlsp_peek_defination_javascript_ttserver/
function lsp_config.preview_location(location, context, before_context)
  -- location may be LocationLink or Location (more useful for the former)
  context = context or 15
  before_context = before_context or 0
  local uri = location.targetUri or location.uri
  if uri == nil then
    return
  end
  local bufnr = vim.uri_to_bufnr(uri)
  if not vim.api.nvim_buf_is_loaded(bufnr) then
    vim.fn.bufload(bufnr)
  end

  local range = location.targetRange or location.range
  local contents = vim.api.nvim_buf_get_lines(
    bufnr,
    range.start.line - before_context,
    range["end"].line + 1 + context,
    false
  )
  local filetype = vim.api.nvim_buf_get_option(bufnr, "filetype")
  return vim.lsp.util.open_floating_preview(contents, filetype, { border = lvim.lsp.popup_border })
end

function lsp_config.preview_location_callback(_, method, result)
  local context = 15
  if result == nil or vim.tbl_isempty(result) then
    print("No location found: " .. method)
    return nil
  end
  if vim.tbl_islist(result) then
    lsp_config.floating_buf, lsp_config.floating_win = lsp_config.preview_location(result[1], context)
  else
    lsp_config.floating_buf, lsp_config.floating_win = lsp_config.preview_location(result, context)
  end
end

function lsp_config.PeekDefinition()
  if vim.tbl_contains(vim.api.nvim_list_wins(), lsp_config.floating_win) then
    vim.api.nvim_set_current_win(lsp_config.floating_win)
  else
    local params = vim.lsp.util.make_position_params()
    return vim.lsp.buf_request(0, "textDocument/definition", params, lsp_config.preview_location_callback)
  end
end

function lsp_config.PeekTypeDefinition()
  if vim.tbl_contains(vim.api.nvim_list_wins(), lsp_config.floating_win) then
    vim.api.nvim_set_current_win(lsp_config.floating_win)
  else
    local params = vim.lsp.util.make_position_params()
    return vim.lsp.buf_request(0, "textDocument/typeDefinition", params, lsp_config.preview_location_callback)
  end
end

function lsp_config.PeekImplementation()
  if vim.tbl_contains(vim.api.nvim_list_wins(), lsp_config.floating_win) then
    vim.api.nvim_set_current_win(lsp_config.floating_win)
  else
    local params = vim.lsp.util.make_position_params()
    return vim.lsp.buf_request(0, "textDocument/implementation", params, lsp_config.preview_location_callback)
  end
end

function lsp_config.common_on_attach(client, bufnr)
  if lvim.lsp.on_attach_callback then
    lvim.lsp.on_attach_callback(client, bufnr)
  end
  lsp_highlight_document(client)
end

local function no_formatter_on_attach(client, bufnr)
  if lvim.lsp.on_attach_callback then
    lvim.lsp.on_attach_callback(client, bufnr)
  end
  lsp_highlight_document(client)
  client.resolved_capabilities.document_formatting = false
end

function lsp_config.common_capabilities()
  local capabilities = vim.lsp.protocol.make_client_capabilities()
  capabilities.textDocument.completion.completionItem.snippetSupport = true
  capabilities.textDocument.completion.completionItem.resolveSupport = {
    properties = {
      "documentation",
      "detail",
      "additionalTextEdits",
    },
  }
  return capabilities
end

require("core.autocmds").define_augroups {
  _general_lsp = {
    { "FileType", "lspinfo", "nnoremap <silent> <buffer> q :q<CR>" },
  },
}

local function is_table(t)
  return type(t) == "table"
end

local function is_string(t)
  return type(t) == "string"
end

local function has_value(tab, val)
  for _, value in ipairs(tab) do
    if value == val then
      return true
    end
  end

  return false
end

function lsp_config.setup(lang)
  local lang_server = lvim.lang[lang].lsp
  local provider = lang_server.provider
  if require("utils").check_lsp_client_active(provider) then
    return
  end

  local overrides = lvim.lsp.override

  if is_table(overrides) then
    if has_value(overrides, lang) then
      return
    end
  end

  if is_string(overrides) then
    if overrides == lang then
      return
    end
  end
  local sources = require("lsp.null-ls").setup(lang)

  for _, source in pairs(sources) do
    local method = source.method
    local format_method = "NULL_LS_FORMATTING"

    if is_table(method) then
      if has_value(method, format_method) then
        lang_server.setup.on_attach = no_formatter_on_attach
      end
    end

    if is_string(method) then
      if method == format_method then
        lang_server.setup.on_attach = no_formatter_on_attach
      end
    end
  end

  if provider == "" or provider == nil then
    return
  end

  require("lspconfig")[provider].setup(lang_server.setup)
end

return lsp_config