automatically enable UI_MODE_NIGHT when gtk-theme-name contains "dark"

gtk-theme-name is only checked once at start up

meson.build

@@ -80,6 +80,7 @@ libtranslationlayer_so = shared_library('translation_layer_main', [
                                                                   	'src/api-impl-jni/android_graphics_Canvas.c',
                                                                   	'src/api-impl-jni/android_graphics_Paint.c',
                                                                   	'src/api-impl-jni/android_util_Log.c',
+                                                                  	'src/api-impl-jni/content/android_content_Context.c',
                                                                   	'src/api-impl-jni/database/android_database_SQLiteCommon.c',
                                                                   	'src/api-impl-jni/database/android_database_SQLiteConnection.c',
                                                                   	'src/api-impl-jni/graphics/android_graphics_BitmapFactory.c',

src/api-impl-jni/android_content_res_AssetManager.c

@@ -376,3 +376,31 @@ JNIEXPORT void JNICALL Java_android_content_res_AssetManager_copyTheme(JNIEnv *e
 {
 	Theme_setTo(_PTR(dest), _PTR(src));
 }
+
+JNIEXPORT void JNICALL Java_android_content_res_AssetManager_setConfiguration(
+    JNIEnv *env, jobject this, jint mcc, jint mnc, jstring locale,
+    jint orientation, jint touchscreen, jint density, jint keyboard,
+    jint keyboardHidden, jint navigation, jint screenWidth, jint screenHeight,
+    jint smallestScreenWidthDp, jint screenWidthDp, jint screenHeightDp,
+    jint screenLayout, jint uiMode, jint majorVersion)
+{
+	struct AssetManager *asset_manager = _PTR(_GET_LONG_FIELD(this, "mObject"));
+	const struct ResTable_config config = {
+		.mcc = mcc,
+		.mnc = mnc,
+		.orientation = orientation,
+		.touchscreen = touchscreen,
+		.density = density,
+		.keyboard = keyboard,
+		.navigation = navigation,
+		.screenWidth = screenWidth,
+		.screenHeight = screenHeight,
+		.smallestScreenWidthDp = smallestScreenWidthDp,
+		.screenWidthDp = screenWidthDp,
+		.screenHeightDp = screenHeightDp,
+		.screenLayout = screenLayout,
+		.uiMode = uiMode,
+		.sdkVersion = majorVersion
+	};
+	AssetManager_setConfiguration(asset_manager, &config, NULL);
+}

src/api-impl-jni/content/android_content_Context.c

@@ -0,0 +1,20 @@
+#define _GNU_SOURCE
+
+#include <gtk/gtk.h>
+#include <string.h>
+
+#include "../defines.h"
+#include "../util.h"
+
+#include "../generated_headers/android_content_Context.h"
+
+JNIEXPORT void JNICALL Java_android_content_Context_native_1updateConfig(JNIEnv *env, jclass class, jobject config)
+{
+	GtkSettings *settings = gtk_settings_get_default();
+	gchar *theme_name;
+	g_object_get(settings, "gtk-theme-name", &theme_name, NULL);
+	bool night_mode = strcasestr(theme_name, "dark") || strcasestr(theme_name, "black");
+	if (night_mode) {
+		_SET_INT_FIELD(config, "uiMode", /*UI_MODE_NIGHT_YES*/ 0x20);
+	}
+}

src/api-impl-jni/generated_headers/android_content_Context.h

@@ -0,0 +1,23 @@
+/* DO NOT EDIT THIS FILE - it is machine generated */
+#include <jni.h>
+/* Header for class android_content_Context */
+
+#ifndef _Included_android_content_Context
+#define _Included_android_content_Context
+#ifdef __cplusplus
+extern "C" {
+#endif
+#undef android_content_Context_MODE_PRIVATE
+#define android_content_Context_MODE_PRIVATE 0L
+/*
+ * Class:     android_content_Context
+ * Method:    native_updateConfig
+ * Signature: (Landroid/content/res/Configuration;)V
+ */
+JNIEXPORT void JNICALL Java_android_content_Context_native_1updateConfig
+  (JNIEnv *, jclass, jobject);
+
+#ifdef __cplusplus
+}
+#endif
+#endif

src/api-impl-jni/generated_headers/android_content_res_AssetManager.h

@@ -81,6 +81,14 @@ JNIEXPORT void JNICALL Java_android_content_res_AssetManager_setLocale
 JNIEXPORT jobjectArray JNICALL Java_android_content_res_AssetManager_getLocales
   (JNIEnv *, jobject);
 
+/*
+ * Class:     android_content_res_AssetManager
+ * Method:    setConfiguration
+ * Signature: (IILjava/lang/String;IIIIIIIIIIIIII)V
+ */
+JNIEXPORT void JNICALL Java_android_content_res_AssetManager_setConfiguration
+  (JNIEnv *, jobject, jint, jint, jstring, jint, jint, jint, jint, jint, jint, jint, jint, jint, jint, jint, jint, jint, jint);
+
 /*
  * Class:     android_content_res_AssetManager
  * Method:    getResourceIdentifier

src/api-impl/android/content/Context.java

@@ -63,7 +63,6 @@ public class Context extends Object {
 
 	static AssetManager assets;
 	static DisplayMetrics dm;
-	static Configuration config;
 	static Resources r;
 	static ApplicationInfo application_info;
 	static Resources.Theme theme;
@@ -82,7 +81,8 @@ public class Context extends Object {
 	static {
 		assets = new AssetManager();
 		dm = new DisplayMetrics();
-		config = new Configuration();
+		Configuration config = new Configuration();
+		native_updateConfig(config);
 		r = new Resources(assets, dm, config);
 		theme = r.newTheme();
 		application_info = new ApplicationInfo();
@@ -97,6 +97,8 @@ public class Context extends Object {
 		}
 	}
 
+	protected static native void native_updateConfig(Configuration config);
+
 	static Application createApplication(long native_window) throws InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException, ClassNotFoundException {
 		Application application;
 		ResXmlAttribute application_name = manifest.getApplicationElement().searchAttributeByResourceId(AndroidManifestBlock.ID_name);

src/api-impl/android/content/res/AssetManager.java

@@ -701,11 +701,11 @@ public final class AssetManager {
 	 * applications.
 	 * {@hide}
 	 */
-	public /*native*/ final void setConfiguration(int mcc, int mnc, String locale,
+	public native final void setConfiguration(int mcc, int mnc, String locale,
 						  int orientation, int touchscreen, int density, int keyboard,
 						  int keyboardHidden, int navigation, int screenWidth, int screenHeight,
 						  int smallestScreenWidthDp, int screenWidthDp, int screenHeightDp,
-						  int screenLayout, int uiMode, int majorVersion) {}
+						  int screenLayout, int uiMode, int majorVersion);
 
 	/**
 	 * Retrieve the resource identifier for the given resource name.

src/api-impl/android/content/res/Resources.java

@@ -208,7 +208,7 @@ public class Resources {
 			mCompatibilityInfo = compatInfo;
 		}
 		mToken = new WeakReference<IBinder>(token);
-		//        updateConfiguration(config, metrics);
+		updateConfiguration(config, metrics);
 		//        assets.ensureStringBlocks();
 	}