Add a utility function to check the SteamDeck environment variable

autotests/utilitytest.cpp

@@ -52,6 +52,18 @@ private Q_SLOTS:
         Utility::writeVersion(verFile.fileName(), QStringLiteral("2023.09.15.0000.0000"));
         QCOMPARE(Utility::readVersion(verFile.fileName()), QStringLiteral("2023.09.15.0000.0000"));
     }
+
+    void testIsSteamDeck()
+    {
+        QCOMPARE(Utility::isSteamDeck(), false);
+
+        qputenv("SteamDeck", "0");
+        QCOMPARE(Utility::isSteamDeck(), false);
+
+        qputenv("SteamDeck", "1");
+
+        QCOMPARE(Utility::isSteamDeck(), true);
+    }
 };
 
 QTEST_MAIN(UtilityTest)

launcher/include/utility.h

@@ -14,4 +14,5 @@ void createPathIfNeeded(const QDir &dir);
 void setSSL(QNetworkRequest &request);
 QString readVersion(const QString &path);
 void writeVersion(const QString &path, const QString &version);
+bool isSteamDeck();
 }

launcher/src/launchercore.cpp

@@ -313,7 +313,7 @@ bool LauncherCore::isSteam() const
 
 bool LauncherCore::isSteamDeck() const
 {
-    return qEnvironmentVariable("SteamDeck") == QStringLiteral("1");
+    return Utility::isSteamDeck();
 }
 
 bool LauncherCore::isWindows()

launcher/src/main.cpp

@@ -4,7 +4,6 @@
 #include <KAboutData>
 #include <KLocalizedContext>
 #include <KLocalizedString>
-#include <QGuiApplication>
 #include <QQuickStyle>
 #include <kdsingleapplication.h>
 #include <qcoroqml.h>
@@ -17,6 +16,7 @@
 #include "launchercore.h"
 #include "logger.h"
 #include "physis_logger.h"
+#include "utility.h"
 
 #ifdef Q_OS_WIN
 #include <BreezeIcons/BreezeIcons>
@@ -36,7 +36,7 @@ int main(int argc, char *argv[])
     QIcon::setThemeName(QStringLiteral("Breeze"));
 #endif
 
-    if (qEnvironmentVariable("SteamDeck") == QStringLiteral("1")) {
+    if (Utility::isSteamDeck()) {
         qputenv("QT_SCALE_FACTOR", "1.25");
         qputenv("QT_QUICK_CONTROLS_MOBILE", "1");
     }
@@ -121,7 +121,6 @@ int main(int argc, char *argv[])
         parser.showVersion();
     }
 
-    bool isSteamDeck = false;
     if (parser.isSet(steamOption)) {
         const QStringList args = parser.positionalArguments();
         // Steam tries to use as a compatibility tool, running installation scripts (like DirectX), so try to ignore it.
@@ -130,14 +129,10 @@ int main(int argc, char *argv[])
         }
     }
 
-    if (qEnvironmentVariable("SteamDeck") == QStringLiteral("1")) {
-        isSteamDeck = true;
-    }
-
 #if defined(Q_OS_LINUX)
     // Default to org.kde.desktop style unless the user forces another style
     if (qEnvironmentVariableIsEmpty("QT_QUICK_CONTROLS_STYLE")) {
-        if (isSteamDeck) {
+        if (Utility::isSteamDeck()) {
             QQuickStyle::setStyle(QStringLiteral("org.kde.breeze"));
         } else {
             QQuickStyle::setStyle(QStringLiteral("org.kde.desktop"));

launcher/src/utility.cpp

@@ -48,4 +48,9 @@ void Utility::writeVersion(const QString &path, const QString &version)
     verFile.open(QIODevice::WriteOnly | QIODevice::Text);
     verFile.write(version.toUtf8());
     verFile.close();
-}
+}
+
+bool Utility::isSteamDeck()
+{
+    return qEnvironmentVariable("SteamDeck") == QStringLiteral("1");
+}