improve lsp configuration

init.vim

@@ -423,5 +423,10 @@ augroup END
 
 "----------------------------------------------------------------------------}}}
 "
+"
+" require lua init
+lua <<EOF
+	require('init')
+EOF
 
 " vim: set foldmethod=marker:

lua/init-lsp.lua

@@ -1,17 +1,3 @@
-vim.diagnostic.config({
-  virtual_text = false,
-  signs = true,
-  underline = false,
-  update_in_insert = false,
-  severity_sort = false,
-})
-
-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
-
 vim.cmd [[
   sign define LspDiagnosticsSignError text= texthl= linehl= numhl=LspDiagnosticsLineNrError
   sign define LspDiagnosticsSignWarning text= texthl= linehl= numhl=LspDiagnosticsLineNrWarning
@@ -72,8 +58,8 @@ local on_attach = function(client, bufnr)
   -- Mappings.
   local opts = { noremap=true, silent=true }
   -- See `:help vim.lsp.*` for documentation on any of the below functions
-  buf_set_keymap('n', '[d', '<cmd>lua vim.diagnostic.goto_prev({float = {...}})<CR>', opts)
-  buf_set_keymap('n', ']d', '<cmd>lua vim.diagnostic.goto_next({float = {...}})<CR>', opts)
+  buf_set_keymap('n', '[d', '<cmd>lua vim.diagnostic.goto_prev({float = false})<CR>', opts)
+  buf_set_keymap('n', ']d', '<cmd>lua vim.diagnostic.goto_next({float = false})<CR>', opts)
   buf_set_keymap('n', 'gd', '<cmd>lua vim.lsp.buf.definition()<CR>', opts)
   buf_set_keymap('n', 'gD', '<cmd>lua vim.lsp.buf.declaration()<CR>', opts)
   buf_set_keymap('n', 'gi', '<cmd>lua vim.lsp.buf.implementation()<CR>', opts)
@@ -101,6 +87,16 @@ local on_attach = function(client, bufnr)
 		vim.cmd [[autocmd BufWritePre <buffer> :lua vim.lsp.buf.formatting_seq_sync({}, 3000)]]
     vim.cmd [[augroup END]]
   end
+
+	if client.resolved_capabilities.document_highlight then
+    vim.cmd [[
+      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
+    ]]
+	end
 end
 
 local capabilities = vim.lsp.protocol.make_client_capabilities()

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