Use relative path for data and config on macOS platform

CMakeLists.txt

@@ -231,14 +231,19 @@ endif()
 
 add_definitions(
   -DVERSION="${VERSION}"
-  -DLOCALEDIR="${CMAKE_INSTALL_FULL_LOCALEDIR}"
   -DPACKAGE="celestia"
-  -DCONFIG_DATA_DIR="${FULL_DATADIR}"
-  -DHIP_DATA_DIR="${FULL_DATADIR}"
-  -DSPLASH_DIR="${FULL_DATADIR}/splash/"
   -DGIT_COMMIT=${GIT_COMMIT}
 )
 
+if(NOT NATIVE_OSX_APP)
+  add_definitions(
+    -DLOCALEDIR="${CMAKE_INSTALL_FULL_LOCALEDIR}"
+    -DCONFIG_DATA_DIR="${FULL_DATADIR}"
+    -DHIP_DATA_DIR="${FULL_DATADIR}"
+    -DSPLASH_DIR="${FULL_DATADIR}/splash/"
+  )
+endif()
+
 if(WIN32)
   add_definitions(
     -D_CRT_SECURE_NO_WARNINGS

src/celestia/qt/qtappwin.cpp

@@ -203,7 +203,13 @@ void CelestiaAppWindow::init(const QString& qConfigFileName,
     QString celestia_data_dir = QString::fromLocal8Bit(::getenv("CELESTIA_DATA_DIR"));
 
     if (celestia_data_dir.isEmpty()) {
-        QString celestia_data_dir = CONFIG_DATA_DIR;
+#ifdef NATIVE_OSX_APP
+        // On macOS data directory is in a fixed position relative to the application bundle
+        QString dataDir = QApplication::applicationDirPath() + "/../Resources";
+#else
+        QString dataDir = CONFIG_DATA_DIR;
+#endif
+        QString celestia_data_dir = dataDir;
         QDir::setCurrent(celestia_data_dir);
     } else if (QDir(celestia_data_dir).isReadable()) {
         QDir::setCurrent(celestia_data_dir);

src/celestia/qt/qtmain.cpp

@@ -71,7 +71,13 @@ int main(int argc, char *argv[])
 
     ParseCommandLine();
 
-    QPixmap pixmap(SPLASH_DIR "splash.png");
+#ifdef NATIVE_OSX_APP
+    // On macOS data directory is in a fixed position relative to the application bundle
+    QString splashDir = QApplication::applicationDirPath() + "/../Resources/splash/";
+#else
+    QString splashDir = SPLASH_DIR;
+#endif
+    QPixmap pixmap(splashDir + "splash.png");
     QSplashScreen splash(pixmap);
     splash.setMask(pixmap.mask());
 
@@ -81,9 +87,15 @@ int main(int argc, char *argv[])
     // Gettext integration
     setlocale(LC_ALL, "");
     setlocale(LC_NUMERIC, "C");
-    bindtextdomain("celestia", LOCALEDIR);
+#ifdef NATIVE_OSX_APP
+    // On macOS locale directory is in a fixed position relative to the application bundle
+    QString localeDir = QApplication::applicationDirPath() + "/../Resources/locale";
+#else
+    QString localeDir = LOCALEDIR;
+#endif
+    bindtextdomain("celestia", localeDir.toUtf8().data());
     bind_textdomain_codeset("celestia", "UTF-8");
-    bindtextdomain("celestia_constellations", LOCALEDIR);
+    bindtextdomain("celestia_constellations", localeDir.toUtf8().data());
     bind_textdomain_codeset("celestia_constellations", "UTF-8");
     textdomain("celestia");