nvim: lsp: add support for lsp functionalites.

nvim/lua/user/plugins/lsp.lua

@@ -42,22 +42,41 @@ return {
             enabled = true,
         },
         codelens = {
-            enabled = false,
+            enabled = true,
         },
         inlay_hints = {
-            enabled = false,
+            enabled = true,
             exclude = {},
         },
         servers = {},
     },
     config = function(_, opts)
         local lspconfig = require("lspconfig")
+        local utils = require("user.utils.lsp")
         local augroup = vim.api.nvim_create_augroup("Lsp", {})
+        local has_cmp, cmp_lsp = pcall(require, "cmp_nvim_lsp")
+        local capabilities = vim.tbl_deep_extend('force',
+            vim.lsp.protocol.make_client_capabilities() or {},
+            has_cmp and cmp_lsp.default_capabilities() or {})
 
         for name, server_opts in pairs(opts.servers) do
-            local on_attach = function(_, bufnr)
+            ---@param client vim.lsp.Client
+            ---@param bufnr number
+            local on_attach = function(client, bufnr)
                 vim.api.nvim_clear_autocmds({ group = augroup, buffer = bufnr })
 
+                if (opts.inlay_hints.enabled or false) and client.server_capabilities.inlayHintProvider then
+                    vim.lsp.inlay_hint.enable(true, { bufnr = bufnr })
+                end
+
+                if opts.codelens.enabled and client.server_capabilities.codeLensProvider then
+                    utils.codelens(augroup, bufnr)
+                end
+
+                if opts.document_highlight.enabled and client.server_capabilities.documentHighlightProvider then
+                    utils.document_highlight(bufnr)
+                end
+
                 -- Setup on save handler
                 if server_opts.on_save then
                     vim.api.nvim_create_autocmd("BufWritePre", {
@@ -69,7 +88,8 @@ return {
             end
 
             server_opts = vim.tbl_deep_extend("force", {
-                on_attach = on_attach
+                on_attach = on_attach,
+                capabilities = capabilities
             }, server_opts or {})
 
             lspconfig[name].setup(server_opts)

nvim/lua/user/utils/lsp.lua

@@ -29,4 +29,12 @@ function M.signature_help_on_hover(bufnr)
     })
 end
 
+function M.codelens(augroup, bufnr)
+    vim.api.nvim_create_autocmd({ "BufEnter", "CursorHold", "InsertLeave" }, {
+        group = augroup,
+        buffer = bufnr,
+        callback = vim.lsp.codelens.refresh,
+    })
+end
+
 return M