Add lsp handlers

1 files changed, 106 insertions, 0 deletions

diff --git a/lua/plugins/lsp/handlers.lua b/lua/plugins/lsp/handlers.lua
new file mode 100644
index 0000000..3dcf0dc
--- /dev/null
+++ b/lua/plugins/lsp/handlers.lua
@@ -0,0 +1,106 @@
+-- Handler for LSP servers.
+
+local M = {}
+
+-- TODO: backfill this to template
+M.setup = function()
+	local signs = {
+		{ name = "DiagnosticSignError", text = "" },
+		{ name = "DiagnosticSignWarn", text = "" },
+		{ name = "DiagnosticSignHint", text = "" },
+		{ name = "DiagnosticSignInfo", text = "" },
+	}
+
+	for _, sign in ipairs(signs) do
+		vim.fn.sign_define(sign.name, { texthl = sign.name, text = sign.text, numhl = "" })
+	end
+
+	local config = {
+		-- disable virtual text
+		virtual_text = false,
+		-- show signs
+		signs = {
+			active = signs,
+		},
+		update_in_insert = true,
+		underline = true,
+		severity_sort = true,
+		float = {
+			focusable = false,
+			style = "minimal",
+			border = "rounded",
+			source = "always",
+			header = "",
+			prefix = "",
+		},
+	}
+
+	vim.diagnostic.config(config)
+
+	vim.lsp.handlers["textDocument/hover"] = vim.lsp.with(vim.lsp.handlers.hover, {
+		border = "rounded",
+	})
+
+	vim.lsp.handlers["textDocument/signatureHelp"] = vim.lsp.with(vim.lsp.handlers.signature_help, {
+		border = "rounded",
+	})
+end
+
+local function lsp_highlight_document(client)
+	-- Set autocommands conditional on server_capabilities
+	if client.resolved_capabilities.document_highlight then
+		vim.api.nvim_exec(
+			[[
+      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
+
+local function lsp_keymaps(bufnr)
+	local opts = { noremap = true, silent = true }
+	vim.api.nvim_buf_set_keymap(bufnr, "n", "gD", "<cmd>lua vim.lsp.buf.declaration()<CR>", opts)
+	vim.api.nvim_buf_set_keymap(bufnr, "n", "gd", "<cmd>lua vim.lsp.buf.definition()<CR>", opts)
+	vim.api.nvim_buf_set_keymap(bufnr, "n", "K", "<cmd>lua vim.lsp.buf.hover()<CR>", opts)
+	vim.api.nvim_buf_set_keymap(bufnr, "n", "gi", "<cmd>lua vim.lsp.buf.implementation()<CR>", opts)
+	vim.api.nvim_buf_set_keymap(bufnr, "n", "<C-k>", "<cmd>lua vim.lsp.buf.signature_help()<CR>", opts)
+	-- vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>rn", "<cmd>lua vim.lsp.buf.rename()<CR>", opts)
+	vim.api.nvim_buf_set_keymap(bufnr, "n", "gr", "<cmd>lua vim.lsp.buf.references()<CR>", opts)
+	-- vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>ca", "<cmd>lua vim.lsp.buf.code_action()<CR>", opts)
+	-- vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>f", "<cmd>lua vim.diagnostic.open_float()<CR>", opts)
+	vim.api.nvim_buf_set_keymap(bufnr, "n", "[d", '<cmd>lua vim.diagnostic.goto_prev({ border = "rounded" })<CR>', opts)
+	vim.api.nvim_buf_set_keymap(
+		bufnr,
+		"n",
+		"gl",
+		'<cmd>lua vim.lsp.diagnostic.show_line_diagnostics({ border = "rounded" })<CR>',
+		opts
+	)
+	vim.api.nvim_buf_set_keymap(bufnr, "n", "]d", '<cmd>lua vim.diagnostic.goto_next({ border = "rounded" })<CR>', opts)
+	vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>q", "<cmd>lua vim.diagnostic.setloclist()<CR>", opts)
+	vim.cmd([[ command! Format execute 'lua vim.lsp.buf.formatting()' ]])
+end
+
+M.on_attach = function(client, bufnr)
+	if client.name == "tsserver" then
+		client.resolved_capabilities.document_formatting = false
+	end
+	lsp_keymaps(bufnr)
+	lsp_highlight_document(client)
+end
+
+local capabilities = vim.lsp.protocol.make_client_capabilities()
+
+local status_ok, cmp_nvim_lsp = pcall(require, "cmp_nvim_lsp")
+if not status_ok then
+	return
+end
+
+M.capabilities = cmp_nvim_lsp.update_capabilities(capabilities)
+
+return M