improve lsp configuration

lua/init.lua

@@ -0,0 +1,40 @@
+vim.diagnostic.config({
+  virtual_text = false,
+  signs = true,
+  underline = false,
+  update_in_insert = false,
+  severity_sort = true,
+	float = {
+    source = "always",  -- Or "if_many"
+  },
+})
+
+vim.cmd [[
+	augroup diagnostic_on_hover
+	autocmd CursorHold,CursorHoldI * lua vim.diagnostic.open_float(nil, {focus=false})
+	augroup END
+]]
+
+local signs = { Error = "● ", Warn = "● ", Hint = "● ", Info = "● " }
+for type, icon in pairs(signs) do
+  local hl = "DiagnosticSign" .. type
+  vim.fn.sign_define(hl, { text = icon, texthl = hl, numhl = hl })
+end
+
+local border = {
+      {"┌", "FloatBorder"},
+      {"─", "FloatBorder"},
+      {"┐", "FloatBorder"},
+      {"│", "FloatBorder"},
+      {"┘", "FloatBorder"},
+      {"─", "FloatBorder"},
+      {"└", "FloatBorder"},
+      {"│", "FloatBorder"},
+}
+
+local orig_util_open_floating_preview = vim.lsp.util.open_floating_preview
+function vim.lsp.util.open_floating_preview(contents, syntax, opts, ...)
+  opts = opts or {}
+  opts.border = opts.border or border
+  return orig_util_open_floating_preview(contents, syntax, opts, ...)
+end