userfeedback: prevent dangling pointer access in SettingsDataSource

When the main window is closed m_mainWindow becomes dangling

Since data collection happens infrequently we don't need to cache the window, just find it on demand

BUG: 519876

SENTRY: DOLPHIN-VPX

2 files changed, 8 insertions, 17 deletions

diff --git a/src/userfeedback/settingsdatasource.cpp b/src/userfeedback/settingsdatasource.cpp
index c517793ad..6e34dbcda 100644
--- a/src/userfeedback/settingsdatasource.cpp
+++ b/src/userfeedback/settingsdatasource.cpp
@@ -31,22 +31,16 @@ QString SettingsDataSource::description() const
 
 QVariant SettingsDataSource::data()
 {
-    if (!m_mainWindow) {
-        // This assumes there is only one DolphinMainWindow per process.
-        const auto topLevelWidgets = QApplication::topLevelWidgets();
-        for (const auto widget : topLevelWidgets) {
-            if (qobject_cast<DolphinMainWindow *>(widget)) {
-                m_mainWindow = static_cast<DolphinMainWindow *>(widget);
-                break;
-            }
-        }
-    }
-
     QVariantMap map;
 
-    if (m_mainWindow) {
-        map.insert(QStringLiteral("informationPanelEnabled"), m_mainWindow->isInformationPanelEnabled());
-        map.insert(QStringLiteral("foldersPanelEnabled"), m_mainWindow->isFoldersPanelEnabled());
+    // This assumes there is only one DolphinMainWindow per process.
+    const auto topLevelWidgets = QApplication::topLevelWidgets();
+    for (const auto widget : topLevelWidgets) {
+        if (auto mainWindow = qobject_cast<DolphinMainWindow *>(widget)) {
+            map.insert(QStringLiteral("informationPanelEnabled"), mainWindow->isInformationPanelEnabled());
+            map.insert(QStringLiteral("foldersPanelEnabled"), mainWindow->isFoldersPanelEnabled());
+            break;
+        }
     }
 
     map.insert(QStringLiteral("tooltipsEnabled"), GeneralSettings::showToolTips());
diff --git a/src/userfeedback/settingsdatasource.h b/src/userfeedback/settingsdatasource.h
index 9804c78a7..bd1cec015 100644
--- a/src/userfeedback/settingsdatasource.h
+++ b/src/userfeedback/settingsdatasource.h
@@ -19,9 +19,6 @@ public:
     QString name() const override;
     QString description() const override;
     QVariant data() override;
-
-private:
-    DolphinMainWindow *m_mainWindow = nullptr;
 };
 
 #endif // SETTINGSDATASOURCE_H