AI Assistant: Check for selection before request for suggestions

Change-Id: I12207d9a9fcfea0b868c5d1c2fe5e2f7c6578f37
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>

share/qtcreator/lua-plugins/ai_asistant/init.lua

@@ -189,6 +189,17 @@ local function sendRequest(request)
 end
 
 local function requestSuggestions()
+  local main_cursor = TextEditor.currentEditor():cursor():mainCursor()
+  if main_cursor == nil then
+    print("No cursor found")
+    return
+  end
+
+  if(main_cursor:hasSelection()) then
+    print("Ignoring requestSuggestions() due to cursor selection")
+    return
+  end
+
   local request_msg = buildRequest()
   if(request_msg == nil) then
     print("requestSuggestions() failed to build request message")