Fix library load on SystemTheme (#868)

skiko/src/awtMain/cpp/linux/theme.cc

@@ -209,7 +209,7 @@ extern "C"
         return true;
     }
 
-    JNIEXPORT jint JNICALL Java_org_jetbrains_skiko_SystemTheme_1awtKt_getCurrentSystemTheme(JNIEnv *env, jobject topLevel)
+    JNIEXPORT jint JNICALL Java_org_jetbrains_skiko_SystemThemeHelper_getCurrentSystemTheme(JNIEnv *env, jobject topLevel)
     {
         int systemTheme = 0;
 

skiko/src/awtMain/cpp/windows/drawlayer.cc

@@ -29,7 +29,7 @@ extern "C"
         return (jlong) dsi_win->hwnd;
     }
 
-    JNIEXPORT jint JNICALL Java_org_jetbrains_skiko_SystemTheme_1awtKt_getCurrentSystemTheme(JNIEnv *env, jobject topLevel)
+    JNIEXPORT jint JNICALL Java_org_jetbrains_skiko_SystemThemeHelper_getCurrentSystemTheme(JNIEnv *env, jobject topLevel)
     {
         auto subkey = L"Software\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize";
         auto name = L"AppsUseLightTheme";

skiko/src/awtMain/kotlin/org/jetbrains/skiko/SystemTheme.awt.kt

 package org.jetbrains.skiko
 
 actual val currentSystemTheme: SystemTheme
-    get() {
+    get() = when (SystemThemeHelper.getCurrentSystemTheme()) {
+        0 -> SystemTheme.LIGHT
+        1 -> SystemTheme.DARK
+        else -> SystemTheme.UNKNOWN
+    }
+
+private object SystemThemeHelper {
+    init {
         Library.load()
-        return when (getCurrentSystemTheme()) {
-            0 -> SystemTheme.LIGHT
-            1 -> SystemTheme.DARK
-            else -> SystemTheme.UNKNOWN
-        }
     }
 
-// Common
-private external fun getCurrentSystemTheme(): Int
+    external fun getCurrentSystemTheme(): Int
+}

skiko/src/awtMain/objectiveC/macos/Drawlayer.mm

@@ -385,7 +385,7 @@ JNIEXPORT void JNICALL Java_org_jetbrains_skiko_PlatformOperationsKt_osxDisableT
     }
 }
 
-JNIEXPORT jint JNICALL Java_org_jetbrains_skiko_SystemTheme_1awtKt_getCurrentSystemTheme(JNIEnv *env, jobject topLevel)
+JNIEXPORT jint JNICALL Java_org_jetbrains_skiko_SystemThemeHelper_getCurrentSystemTheme(JNIEnv *env, jobject topLevel)
 {
     @autoreleasepool {
         NSString *osxMode = [[NSUserDefaults standardUserDefaults] stringForKey:@"AppleInterfaceStyle"];