Fix incorrect fallback for icon themes

When using themed icons, we incorrectly used the systemTheme
as the fallback. This is not correct as the idea of the fallback
was to use the generic "gnome" or "oxygen" themes if the
proper theme was not available.

Reviewed-by: joao

1 files changed, 19 insertions, 18 deletions

diff --git a/src/gui/image/qiconloader.cpp b/src/gui/image/qiconloader.cpp
index 908b8a1398..adc2967bf4 100644
--- a/src/gui/image/qiconloader.cpp
+++ b/src/gui/image/qiconloader.cpp
@@ -68,41 +68,42 @@ QT_BEGIN_NAMESPACE
 
 Q_GLOBAL_STATIC(QIconLoader, iconLoaderInstance)
 
+static QString fallbackTheme()
+{
+    QString defaultTheme;
+#ifdef Q_WS_X11
+    if (X11->desktopEnvironment == DE_GNOME)
+        defaultTheme = QLatin1String("gnome");
+    else if (X11->desktopEnvironment == DE_KDE)
+        defaultTheme = X11->desktopVersion >= 4 ?
+                QString::fromLatin1("oxygen") :
+                QString::fromLatin1("crystalsvg");
+#endif
+    return defaultTheme;
+}
+
 static QString systemThemeName()
 {
-    QString result;
+    QString result = fallbackTheme();
 #ifdef Q_WS_X11
     if (X11->desktopEnvironment == DE_GNOME) {
-#if defined(QT_NO_STYLE_GTK)
-        result = QLatin1String("gnome");
-#else	
+#ifndef QT_NO_STYLE_GTK
         result = QGtk::getGConfString(QLatin1String("/desktop/gnome/interface/icon_theme"),
-                                      QLatin1String("gnome"));
+                                      result);
 #endif
     } else if (X11->desktopEnvironment == DE_KDE) {
-        QString kdeDefault = X11->desktopVersion >= 4 ?
-                             QString::fromLatin1("oxygen") :
-                             QString::fromLatin1("crystalsvg");
-
         QSettings settings(QKde::kdeHome() +
                            QLatin1String("/share/config/kdeglobals"),
                            QSettings::IniFormat);
 
         settings.beginGroup(QLatin1String("Icons"));
 
-        result = settings.value(QLatin1String("Theme"), kdeDefault).toString();
+        result = settings.value(QLatin1String("Theme"), result).toString();
     }
 #endif
     return result;
 }
 
-static QString fallbackTheme()
-{
-    QString defaultTheme = systemThemeName();
-    if (defaultTheme.isEmpty())
-        defaultTheme = QLatin1String("hicolor");
-    return defaultTheme;
-}
 
 QIconLoader::QIconLoader() :
         m_themeKey(1), m_supportsSvg(false)
@@ -269,7 +270,7 @@ QIconTheme::QIconTheme(const QString &themeName)
             m_parents.append(fallbackTheme());
 
         // Ensure that all themes fall back to hicolor
-        if (!m_parents.isEmpty())
+        if (!m_parents.contains(QLatin1String("hicolor")))
             m_parents.append(QLatin1String("hicolor"));
     }
 }