More fixes discovered based on Deedra's work.

main.cpp

@@ -16,6 +16,7 @@
 #include "bootstrapper_controls.h"
 #include "bootstrapper_hook.h"
 #include "version.h"
+#include "text_limits.h"
 
 #include <commctrl.h>
 #include <gio/gio.h>
@@ -411,11 +412,13 @@ ControlDescription describe_standard_control(HWND window) {
       if (!control.states.empty()) control.states += ", ";
       control.states += row.checked ? "checked" : "not checked";
     }
-    lastListControl = window;
-    lastListIndex = row.index;
-    lastListCount = row.count;
-    lastListSelected = row.selected;
-    lastListChecked = row.checked;
+    if (row.available) {
+      lastListControl = window;
+      lastListIndex = row.index;
+      lastListCount = row.count;
+      lastListSelected = row.selected;
+      lastListChecked = row.checked;
+    } else lastListControl = nullptr; // Retry after a late native reply.
     return control;
   }
 
@@ -426,8 +429,10 @@ ControlDescription describe_standard_control(HWND window) {
     control.states = item.states;
     control.position = item.position;
     control.count = item.count;
-    lastNativeControl = window;
-    lastNativeItem = item.key;
+    if (item.available) {
+      lastNativeControl = window;
+      lastNativeItem = item.key;
+    } else lastNativeControl = nullptr;
     return control;
   }
 
@@ -1067,6 +1072,7 @@ extern "C" error_status_t __stdcall testIfRunning(void) {
   return reader_is_available() ? ERROR_SUCCESS : ERROR_SERVICE_NOT_ACTIVE;
 }
 extern "C" error_status_t __stdcall speakText(const wchar_t *text) {
+  if (!controller_text_fits(text)) return ERROR_INVALID_PARAMETER;
   const std::string utf8 = to_utf8(text);
   // Tolk calls cancelSpeech separately when its interrupt argument is true.
   return call_boolean("SpeakText", g_variant_new("(sb)", utf8.c_str(), FALSE));
@@ -1075,6 +1081,7 @@ extern "C" error_status_t __stdcall cancelSpeech(void) {
   return call_boolean("CancelSpeech", nullptr);
 }
 extern "C" error_status_t __stdcall brailleMessage(const wchar_t *text) {
+  if (!controller_text_fits(text)) return ERROR_INVALID_PARAMETER;
   const std::string utf8 = to_utf8(text);
   return call_boolean("BrailleMessage", g_variant_new("(s)", utf8.c_str()));
 }
@@ -1086,6 +1093,7 @@ extern "C" error_status_t __stdcall getProcessId(ULONG *pid) {
 }
 extern "C" error_status_t __stdcall speakSsml(const wchar_t *ssml, SYMBOL_LEVEL,
                                               SPEECH_PRIORITY, boolean) {
+  if (!controller_text_fits(ssml)) return ERROR_INVALID_PARAMETER;
   const std::string utf8 = to_utf8(ssml);
   GError *error = nullptr;
   GVariant *reply = g_dbus_connection_call_sync(