dotfiles/nvim/lua/lsp.lua

-- Mappings.
-- See `:help vim.diagnostic.*` for documentation on any of the below functions
local opts = { noremap = true, silent = true }
vim.keymap.set('n', '<leader>e', vim.diagnostic.open_float, opts)
vim.keymap.set('n', '[d', vim.diagnostic.goto_prev, opts)
vim.keymap.set('n', ']d', vim.diagnostic.goto_next, opts)
vim.keymap.set('n', '<leader>q', vim.diagnostic.setloclist, opts)

local navic = require("nvim-navic")

-- Use an on_attach function to only map the following keys
-- after the language server attaches to the current buffer
local on_attach = function(client, bufnr)
	-- Enable completion triggered by <c-x><c-o>
	-- vim.api.nvim_buf_set_option(bufnr, 'omnifunc', 'v:lua.vim.lsp.omnifunc')

	-- Mappings.
	-- See `:help vim.lsp.*` for documentation on any of the below functions
	local bufopts = { noremap = true, silent = true, buffer = bufnr }
	vim.keymap.set('n', 'gD', vim.lsp.buf.declaration, bufopts)
	vim.keymap.set('n', 'gd', vim.lsp.buf.definition, bufopts)
	vim.keymap.set('n', 'K', vim.lsp.buf.hover, bufopts)
	vim.keymap.set('n', 'gi', vim.lsp.buf.implementation, bufopts)
	vim.keymap.set('n', '<C-k>', vim.lsp.buf.signature_help, bufopts)
	vim.keymap.set('n', '<leader>wa', vim.lsp.buf.add_workspace_folder, bufopts)
	vim.keymap.set('n', '<leader>wr', vim.lsp.buf.remove_workspace_folder, bufopts)
	vim.keymap.set('n', '<leader>wl', function()
		print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
	end, bufopts)
	vim.keymap.set('n', '<leader>D', vim.lsp.buf.type_definition, bufopts)
	vim.keymap.set('n', '<leader>rn', vim.lsp.buf.rename, bufopts)
	vim.keymap.set('n', '<leader>ca', vim.lsp.buf.code_action, bufopts)
	vim.keymap.set('n', 'gr', vim.lsp.buf.references, bufopts)
	vim.keymap.set('n', '<leader>fm', function()
		vim.lsp.buf.format({ async = true })
	end, bufopts)

	if client.server_capabilities.documentSymbolProvider then
		navic.attach(client, bufnr)
	end

	vim.lsp.handlers["textDocument/publishDiagnostics"] = vim.lsp.with(vim.lsp.diagnostic.on_publish_diagnostics, {
		virtual_text = {
			prefix = "",
			spacing = 4,
		},
		signs = true,
		underline = true,
	})
end

local lsp_flags = {
	-- This is the default in Nvim 0.7+
	debounce_text_changes = 150,
}

local mason = require('mason')
local mason_lspconfig = require('mason-lspconfig')
local lspconfig = require('lspconfig')
local cmp = require('cmp')
local luasnip = require('luasnip')
local lspkind = require('lspkind')

luasnip.config.set_config {
	region_check_events = {'CursorMoved', 'InsertEnter'},
	delete_check_events = {'TextChanged', 'InsertLeave'},
	enable_autosnippets = true,
}

cmp.setup {
	snippet = {
		expand = function(args)
			luasnip.lsp_expand(args.body)
		end,
	},
	window = {
		-- completion = cmp.config.window.bordered(),
		documentation = cmp.config.window.bordered(),
	},
	mapping = cmp.mapping.preset.insert({
		['<C-b>'] = cmp.mapping.scroll_docs(-4),
		['<C-f>'] = cmp.mapping.scroll_docs(4),
		['<C-j>'] = cmp.mapping.select_next_item(),
		['<C-k>'] = cmp.mapping.select_prev_item(),
		['<C-Space>'] = cmp.mapping.complete(),
		['<C-e>'] = cmp.mapping.abort(),
		['<CR>'] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.

		--[[['<Tab>'] = cmp.mapping(function(fallback)
			if luasnip.expandable() then
				luasnip.expand()
			elseif cmp.visible() then
				if #cmp.get_entries() == 1 then
					cmp.confirm({ select = true})
				else
					cmp.select_next_item({ behavior = cmp.SelectBehavior.Select })
				end
			elseif luasnip.locally_jumpable() then
				luasnip.jump()
			else
				fallback()
			end
		end, {"i", "s", "c"}),
		['<S-Tab>'] = cmp.mapping(function (fallback)
			if cmp.visible() then
				cmp.select_prev_item({ behavior = cmp.SelectBehavior.Select })
			elseif luasnip.locally_jumpable(-1) then
				luasnip.jump(-1)
			else
				fallback()
			end
		end, {"i", "s", "c"}),]]
	}),
	sources = cmp.config.sources({
		{ name = 'nvim_lsp' },
		{ name = 'luasnip' },
		{ name = 'spell' },
	}, {
		{ name = 'buffer' },
	}),
	formatting = {
		format = lspkind.cmp_format({
			mode = 'text_symbol',
			preset = 'default',
			maxwidth = 50,
		}),
	},
}

cmp.setup.cmdline('/', {
	mapping = cmp.mapping.preset.cmdline(),
	sources = {
		{ name = 'buffer' }
	}
})

cmp.setup.cmdline(':', {
	mapping = cmp.mapping.preset.cmdline(),
	sources = cmp.config.sources({
		{ name = 'path' }
	}, {
		{ name = 'cmdline' }
	})
})

require "neodev".setup {
}

mason.setup()
mason_lspconfig.setup()

local capabilities = require('cmp_nvim_lsp').default_capabilities(vim.lsp.protocol.make_client_capabilities())

lspconfig.util.default_config = vim.tbl_extend(
	"force",
	lspconfig.util.default_config,
	{
		on_attach = on_attach,
		flags = lsp_flags,
		capabilities = capabilities,
	}
)

mason_lspconfig.setup_handlers {
	function(server_name)
		lspconfig[server_name].setup {}
	end,
}


-- Load all snippets from the nvim/LuaSnip directory at startup
require("luasnip.loaders.from_lua").load()