tdf#49895: search in Options: check if label exists (related to tdf#157266)

- since ids in ui files can be changed or removed,
we have to check if they are exits or not, to prevent
any crash or misbehavior.
- Proper solution will be iterating over the
widget ids and collecting their strings without
based on a list of identifiers.

Change-Id: I2088af6842ad0acd00838a37295dc2e6140096f2
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/157103
Reviewed-by: Andreas Heinisch <andreas.heinisch@yahoo.de>
Tested-by: Andreas Heinisch <andreas.heinisch@yahoo.de>

1 files changed, 12 insertions, 3 deletions

diff --git a/starmath/source/dialog.cxx b/starmath/source/dialog.cxx
index f06cb60bc929..c87b987660e4 100644
--- a/starmath/source/dialog.cxx
+++ b/starmath/source/dialog.cxx
@@ -193,18 +193,27 @@ OUString SmPrintOptionsTabPage::GetAllStrings()
     OUString labels[] = { "label4", "label5", "label1", "label6" };
 
     for (const auto& label : labels)
-        sAllStrings += m_xBuilder->weld_label(label)->get_label() + " ";
+    {
+        if (const auto& pString = m_xBuilder->weld_label(label))
+            sAllStrings += pString->get_label() + " ";
+    }
 
     OUString checkButton[]
         = { "title", "text", "frame", "norightspaces", "saveonlyusedsymbols", "autoclosebrackets" };
 
     for (const auto& check : checkButton)
-        sAllStrings += m_xBuilder->weld_check_button(check)->get_label() + " ";
+    {
+        if (const auto& pString = m_xBuilder->weld_check_button(check))
+            sAllStrings += pString->get_label() + " ";
+    }
 
     OUString radioButton[] = { "sizenormal", "sizescaled", "sizezoomed" };
 
     for (const auto& radio : radioButton)
-        sAllStrings += m_xBuilder->weld_radio_button(radio)->get_label() + " ";
+    {
+        if (const auto& pString = m_xBuilder->weld_radio_button(radio))
+            sAllStrings += pString->get_label() + " ";
+    }
 
     return sAllStrings.replaceAll("_", "");
 }