JBR-6372: implement detecting of OS theme on linux

make/modules/java.desktop/lib/Awt2dLibraries.gmk

@@ -174,6 +174,7 @@ $(eval $(call SetupJdkLibrary, BUILD_LIBAWT, \
     DISABLED_WARNINGS_clang_debug_trace.c := format-nonliteral, \
     DISABLED_WARNINGS_clang_Trace.c := format-nonliteral, \
     DISABLED_WARNINGS_clang_TransformHelper.c := sign-compare, \
+    DISABLED_WARNINGS_clang_system_properties.c := format-nonliteral, \
     DISABLED_WARNINGS_microsoft := 4244 4996, \
     DISABLED_WARNINGS_microsoft_awt_Toolkit.cpp := 4267, \
     LDFLAGS := $(LDFLAGS_JDKLIB) $(call SET_SHARED_LIBRARY_ORIGIN), \
@@ -1113,6 +1114,7 @@ ifeq ($(call isTargetOs, macosx), true)
       DISABLED_WARNINGS_clang_OGLPaints.c := format-nonliteral, \
       DISABLED_WARNINGS_clang_PrinterView.m := enum-conversion, \
       DISABLED_WARNINGS_clang_SystemHotkey.m := format-nonliteral, \
+      DISABLED_WARNINGS_clang_system_properties.c := format-nonliteral, \
       LDFLAGS := $(LDFLAGS_JDKLIB) \
           $(call SET_SHARED_LIBRARY_ORIGIN) \
           -L$(INSTALL_LIBRARIES_HERE), \

src/java.desktop/unix/classes/sun/awt/UNIXToolkit.java

@@ -25,6 +25,7 @@
 package sun.awt;
 
 import java.awt.RenderingHints;
+import java.awt.Toolkit;
 
 import static java.awt.RenderingHints.KEY_TEXT_ANTIALIASING;
 import static java.awt.RenderingHints.VALUE_TEXT_ANTIALIAS_DEFAULT;
@@ -51,11 +52,13 @@ import java.security.AccessController;
 import java.security.PrivilegedAction;
 import java.util.Arrays;
 
+import jdk.internal.misc.InnocuousThread;
 import sun.awt.X11.XBaseWindow;
 import sun.security.action.GetIntegerAction;
 import com.sun.java.swing.plaf.gtk.GTKConstants.TextDirection;
 import sun.java2d.opengl.OGLRenderQueue;
 import sun.security.action.GetPropertyAction;
+import sun.util.logging.PlatformLogger;
 
 public abstract class UNIXToolkit extends SunToolkit
 {
@@ -108,6 +111,18 @@ public abstract class UNIXToolkit extends SunToolkit
     private Boolean nativeGTKAvailable;
     private Boolean nativeGTKLoaded;
     private BufferedImage tmpImage = null;
+    private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.UNIXToolkit");
+
+    private static void printError(String str) {
+        log.fine(str);
+    }
+
+    private static native void toolkitInit();
+
+    protected UNIXToolkit() {
+        toolkitInit();
+        initSystemPropertyWatcher();
+    }
 
     public static int getDatatransferTimeout() {
         @SuppressWarnings("removal")
@@ -478,6 +493,8 @@ public abstract class UNIXToolkit extends SunToolkit
         return result;
     }
 
+    private static native int isSystemDarkColorScheme();
+
     @Override
     public boolean isRunningOnXWayland() {
         return isOnXWayland();
@@ -496,6 +513,35 @@ public abstract class UNIXToolkit extends SunToolkit
     // application icons).
     private static final WindowFocusListener waylandWindowFocusListener;
 
+    private static final String OS_THEME_IS_DARK = "awt.os.theme.isDark";
+
+    private static Thread systemPropertyWatcher = null;
+
+    private void initSystemPropertyWatcher() {
+        int initialSystemDarkColorScheme = isSystemDarkColorScheme();
+
+        if (initialSystemDarkColorScheme >= 0) {
+            setDesktopProperty(OS_THEME_IS_DARK, initialSystemDarkColorScheme != 0);
+
+            systemPropertyWatcher = InnocuousThread.newThread("SystemPropertyWatcher",
+                    () -> {
+                        while (true) {
+                            try {
+                                int isSystemDarkColorScheme = isSystemDarkColorScheme();
+                                if (isSystemDarkColorScheme >= 0) {
+                                    setDesktopProperty(OS_THEME_IS_DARK, isSystemDarkColorScheme != 0);
+                                }
+
+                                Thread.sleep(1000);
+                            } catch (Exception ignored) {
+                            }
+                        }
+                    });
+            systemPropertyWatcher.setDaemon(true);
+            systemPropertyWatcher.start();
+        }
+    }
+
     static {
         if (isOnXWayland()) {
             waylandWindowFocusListener = new WindowAdapter() {

src/java.desktop/unix/native/common/awt/dbus_interface.c

@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, JetBrains s.r.o.. All rights reserved.
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include "dbus_interface.h"
+
+#include <dlfcn.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+#include "jvm_md.h"
+
+#define DBUS_LIB JNI_LIB_NAME("dbus-1")
+#define DBUS_LIB_VERSIONED VERSIONED_JNI_LIB_NAME("dbus-1", "3")
+
+static bool isCurrentVersionSupported(DBusApi* dBusApi) {
+    int major = 0, minor = 0, micro = 0;
+    dBusApi->dbus_get_version(&major, &minor, &micro);
+    return major == 1;
+}
+
+static bool DBusApi_init(DBusApi* dBusApi, void *libhandle) {
+    dBusApi->dbus_get_version = dlsym(libhandle, "dbus_get_version");
+    if (dBusApi->dbus_get_version == NULL || !isCurrentVersionSupported(dBusApi)) {
+        return false;
+    }
+
+    dBusApi->dbus_error_init = dlsym(libhandle, "dbus_error_init");
+    dBusApi->dbus_bus_get = dlsym(libhandle, "dbus_bus_get");
+    dBusApi->dbus_error_is_set = dlsym(libhandle, "dbus_error_is_set");
+    dBusApi->dbus_bus_request_name = dlsym(libhandle, "dbus_bus_request_name");
+    dBusApi->dbus_bus_add_match = dlsym(libhandle, "dbus_bus_add_match");
+    dBusApi->dbus_connection_add_filter = dlsym(libhandle, "dbus_connection_add_filter");
+    dBusApi->dbus_connection_flush = dlsym(libhandle, "dbus_connection_flush");
+    dBusApi->dbus_connection_read_write = dlsym(libhandle, "dbus_connection_read_write");
+    dBusApi->dbus_connection_dispatch = dlsym(libhandle, "dbus_connection_dispatch");
+    dBusApi->dbus_message_is_signal = dlsym(libhandle, "dbus_message_is_signal");
+    dBusApi->dbus_message_new_method_call = dlsym(libhandle, "dbus_message_new_method_call");
+    dBusApi->dbus_message_set_destination = dlsym(libhandle, "dbus_message_set_destination");
+    dBusApi->dbus_message_iter_init_append = dlsym(libhandle, "dbus_message_iter_init_append");
+    dBusApi->dbus_message_iter_append_basic = dlsym(libhandle, "dbus_message_iter_append_basic");
+    dBusApi->dbus_connection_send_with_reply_and_block = dlsym(libhandle, "dbus_connection_send_with_reply_and_block");
+    dBusApi->dbus_message_iter_init = dlsym(libhandle, "dbus_message_iter_init");
+    dBusApi->dbus_message_iter_get_arg_type = dlsym(libhandle, "dbus_message_iter_get_arg_type");
+    dBusApi->dbus_message_iter_get_basic = dlsym(libhandle, "dbus_message_iter_get_basic");
+    dBusApi->dbus_message_iter_recurse = dlsym(libhandle, "dbus_message_iter_recurse");
+    dBusApi->dbus_message_iter_next = dlsym(libhandle, "dbus_message_iter_next");
+    dBusApi->dbus_message_unref = dlsym(libhandle, "dbus_message_unref");
+    dBusApi->dbus_message_set_auto_start = dlsym(libhandle, "dbus_message_set_auto_start");
+
+    return dBusApi->dbus_error_init != NULL && dBusApi->dbus_bus_get != NULL && dBusApi->dbus_error_is_set != NULL &&
+            dBusApi->dbus_bus_request_name != NULL && dBusApi->dbus_bus_add_match != NULL &&
+            dBusApi->dbus_connection_add_filter != NULL && dBusApi->dbus_connection_flush != NULL &&
+            dBusApi->dbus_connection_read_write != NULL && dBusApi->dbus_connection_dispatch != NULL &&
+            dBusApi->dbus_message_is_signal != NULL && dBusApi->dbus_message_new_method_call != NULL &&
+            dBusApi->dbus_message_set_destination != NULL && dBusApi->dbus_message_iter_init_append != NULL &&
+            dBusApi->dbus_message_iter_append_basic != NULL && dBusApi->dbus_connection_send_with_reply_and_block != NULL &&
+            dBusApi->dbus_message_iter_init != NULL && dBusApi->dbus_message_iter_get_arg_type != NULL &&
+            dBusApi->dbus_message_iter_get_basic != NULL && dBusApi->dbus_message_iter_recurse != NULL &&
+            dBusApi->dbus_message_iter_next != NULL && dBusApi->dbus_message_unref != NULL &&
+            dBusApi->dbus_message_set_auto_start != NULL;
+}
+
+DBusApi* DBusApi_setupDBus(void *libhandle) {
+    DBusApi *dBusApi = (DBusApi*)malloc(sizeof(DBusApi));
+    if (dBusApi == NULL || !DBusApi_init(dBusApi, libhandle)) {
+        free(dBusApi);
+        dBusApi = NULL;
+    }
+
+    return dBusApi;
+}
+
+DBusApi* DBusApi_setupDBusDefault() {
+    void *dbus_libhandle = dlopen(DBUS_LIB, RTLD_LAZY | RTLD_LOCAL);
+    if (dbus_libhandle == NULL) {
+        dbus_libhandle = dlopen(DBUS_LIB_VERSIONED, RTLD_LAZY | RTLD_LOCAL);
+        if (dbus_libhandle == NULL) {
+            return NULL;
+        }
+    }
+
+    return DBusApi_setupDBus(dbus_libhandle);
+}

src/java.desktop/unix/native/common/awt/dbus_interface.h

@@ -0,0 +1,179 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, JetBrains s.r.o.. All rights reserved.
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#ifndef JETBRAINSRUNTIME_DBUS_INTERFACE_H
+#define JETBRAINSRUNTIME_DBUS_INTERFACE_H
+
+#define DBUS_NAME_FLAG_ALLOW_REPLACEMENT 0x1
+#define DBUS_NAME_FLAG_REPLACE_EXISTING  0x2
+#define DBUS_NAME_FLAG_DO_NOT_QUEUE      0x4
+
+#define DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER  1
+#define DBUS_REQUEST_NAME_REPLY_IN_QUEUE       2
+#define DBUS_REQUEST_NAME_REPLY_EXISTS         3
+#define DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER  4
+
+typedef enum
+{
+    DBUS_BUS_SESSION,    /**< The login session bus */
+    DBUS_BUS_SYSTEM,     /**< The systemwide bus */
+    DBUS_BUS_STARTER     /**< The bus that started us, if any */
+} DBusBusType;
+
+typedef enum
+{
+    DBUS_HANDLER_RESULT_HANDLED,         /**< Message has had its effect - no need to run more handlers. */
+    DBUS_HANDLER_RESULT_NOT_YET_HANDLED, /**< Message has not had any effect - see if other handlers want it. */
+    DBUS_HANDLER_RESULT_NEED_MEMORY      /**< Need more memory in order to return #DBUS_HANDLER_RESULT_HANDLED or #DBUS_HANDLER_RESULT_NOT_YET_HANDLED. Please try again later with more memory. */
+} DBusHandlerResult;
+
+typedef enum
+{
+    DBUS_DISPATCH_DATA_REMAINS,  /**< There is more data to potentially convert to messages. */
+    DBUS_DISPATCH_COMPLETE,      /**< All currently available data has been processed. */
+    DBUS_DISPATCH_NEED_MEMORY    /**< More memory is needed to continue. */
+} DBusDispatchStatus;
+
+typedef struct DBusConnection DBusConnection;
+typedef struct DBusMessage DBusMessage;
+
+typedef DBusHandlerResult (*DBusHandleMessageFunction) (DBusConnection     *connection,
+                                                        DBusMessage        *message,
+                                                        void               *user_data);
+
+typedef void (*DBusFreeFunction) (void *memory);
+
+typedef struct DBusError DBusError;
+
+struct DBusError
+{
+    const char *name;
+    const char *message;
+
+    unsigned int dummy1 : 1;
+    unsigned int dummy2 : 1;
+    unsigned int dummy3 : 1;
+    unsigned int dummy4 : 1;
+    unsigned int dummy5 : 1;
+
+    void *padding1;
+};
+
+typedef unsigned int dbus_uint32_t;
+typedef dbus_uint32_t  dbus_bool_t;
+
+typedef struct DBusMessageIter DBusMessageIter;
+
+struct DBusMessageIter
+{
+    void *dummy1;
+    void *dummy2;
+    dbus_uint32_t dummy3;
+    int dummy4;
+    int dummy5;
+    int dummy6;
+    int dummy7;
+    int dummy8;
+    int dummy9;
+    int dummy10;
+    int dummy11;
+    int pad1;
+    int pad2;
+    void *pad3;
+};
+
+#define DBUS_TYPE_INT16         ((int) 'n')
+#define DBUS_TYPE_UINT16        ((int) 'q')
+#define DBUS_TYPE_INT32         ((int) 'i')
+#define DBUS_TYPE_UINT32        ((int) 'u')
+#define DBUS_TYPE_INT64         ((int) 'x')
+#define DBUS_TYPE_UINT64        ((int) 't')
+#define DBUS_TYPE_DOUBLE        ((int) 'd')
+#define DBUS_TYPE_BYTE          ((int) 'y')
+#define DBUS_TYPE_BOOLEAN       ((int) 'b')
+#define DBUS_TYPE_STRING        ((int) 's')
+#define DBUS_TYPE_VARIANT       ((int) 'v')
+#define DBUS_TYPE_INVALID       ((int) '\0')
+
+typedef struct DBusApi {
+    void (*dbus_get_version)(int *major_version_p, int *minor_version_p, int *micro_version_p);
+
+    void (*dbus_error_init)(DBusError *error);
+
+    DBusConnection *(*dbus_bus_get)(DBusBusType type, DBusError *error);
+
+    dbus_bool_t (*dbus_error_is_set)(const DBusError *error);
+
+    void (*dbus_error_free)(DBusError *error);
+
+    int (*dbus_bus_request_name)(DBusConnection *connection, const char *name, unsigned int flags, DBusError *error);
+
+    void (*dbus_bus_add_match)(DBusConnection *connection, const char *rule, DBusError *error);
+
+    dbus_bool_t (*dbus_connection_add_filter)(DBusConnection *connection, DBusHandleMessageFunction function,
+            void *user_data, DBusFreeFunction free_data_function);
+
+    void (*dbus_connection_flush)(DBusConnection *connection);
+
+    dbus_bool_t (*dbus_connection_read_write)(DBusConnection *connection, int timeout_milliseconds);
+
+    DBusDispatchStatus (*dbus_connection_dispatch)(DBusConnection *connection);
+
+    dbus_bool_t (*dbus_message_is_signal)(DBusMessage *message, const char *iface, const char *signal_name);
+
+    DBusMessage* (*dbus_message_new_method_call)(const char *bus_name, const char *path,
+            const char *iface, const char *method);
+
+    dbus_bool_t (*dbus_message_set_destination)(DBusMessage *message, const char *destination);
+
+    void (*dbus_message_iter_init_append)(DBusMessage *message, DBusMessageIter *iter);
+
+    dbus_bool_t (*dbus_message_iter_append_basic)(DBusMessageIter *iter, int type, const void *value);
+
+    DBusMessage *(*dbus_connection_send_with_reply_and_block)(DBusConnection *connection, DBusMessage *message,
+                                                           int timeout_milliseconds, DBusError *error);
+
+    dbus_bool_t (*dbus_message_iter_init)(DBusMessage *message, DBusMessageIter *iter);
+
+    int (*dbus_message_iter_get_arg_type)(DBusMessageIter *iter);
+
+    void (*dbus_message_iter_get_basic)(DBusMessageIter *iter, void *value);
+
+    void (*dbus_message_iter_recurse)(DBusMessageIter *iter, DBusMessageIter *sub);
+
+    dbus_bool_t (*dbus_message_iter_next)(DBusMessageIter *iter);
+
+    void (*dbus_message_unref)(DBusMessage *message);
+
+    void (*dbus_message_set_auto_start)(DBusMessage *message, dbus_bool_t auto_start);
+} DBusApi;
+
+
+DBusApi* DBusApi_setupDBus(void *libhandle);
+DBusApi* DBusApi_setupDBusDefault();
+
+#endif //JETBRAINSRUNTIME_DBUS_INTERFACE_H

src/java.desktop/unix/native/common/awt/system_properties.c

@@ -0,0 +1,238 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, JetBrains s.r.o.. All rights reserved.
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include "system_properties.h"
+
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define UNKNOWN_RESULT -1
+#define SETTING_INTERFACE "org.freedesktop.portal.Settings"
+#define SETTING_INTERFACE_METHOD "Read"
+#define DESKTOP_DESTINATION "org.freedesktop.portal.Desktop"
+#define DESKTOP_PATH "/org/freedesktop/portal/desktop"
+#define REPLY_TIMEOUT 150
+
+static DBusConnection *connection = NULL;
+static JNIEnv *env = NULL;
+static DBusApi *dBus = NULL;
+static bool initialized = false;
+static bool logEnabled = true;
+extern JavaVM *jvm;
+
+static void printError(const char* fmt, ...) {
+    if (!logEnabled) {
+        return;
+    }
+
+    env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2);
+    char* buf = (char*)malloc(1024);
+
+    if (env && buf) {
+        va_list vargs;
+        va_start(vargs, fmt);
+        vsnprintf(buf, 1024, fmt, vargs);
+        jstring text = JNU_NewStringPlatform(env, buf);
+        free(buf);
+        va_end(vargs);
+
+        jboolean ignoreException;
+        JNU_CallStaticMethodByName(env, &ignoreException, "sun/awt/UNIXToolkit", "printError",
+                                   "(Ljava/lang/String;)V", text);
+    }
+}
+
+static bool dbusCheckError(DBusError *err, const char *msg) {
+    bool is_error_set = dBus->dbus_error_is_set(err);
+    if (is_error_set) {
+        printError("DBus error: %s. %s\n", msg, err->message);
+        dBus->dbus_error_free(err);
+    }
+    return is_error_set;
+}
+
+bool SystemProperties_setup(DBusApi *dBus_, JNIEnv *env_) {
+    env = env_;
+    dBus = dBus_;
+    DBusError err;
+    int ret;
+
+    dBus->dbus_error_init(&err);
+    if ((connection = dBus->dbus_bus_get(DBUS_BUS_SESSION, &err)) == NULL) {
+        printError("DBus error: connection is Null\n");
+        return false;
+    }
+    if (dbusCheckError(&err, "connection error")) {
+        return false;
+    }
+
+    ret = dBus->dbus_bus_request_name(connection, "dbus.JBR.server", DBUS_NAME_FLAG_REPLACE_EXISTING , &err);
+    if (ret != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER && ret != DBUS_REQUEST_NAME_REPLY_IN_QUEUE) {
+        printError("DBus error: Failed to acquire service name \n");
+        return false;
+    }
+    if (dbusCheckError(&err, "error request 'dbus.JBR.server' name on the bus")) {
+        return false;
+    }
+
+    dBus->dbus_connection_flush(connection);
+    initialized = true;
+
+    return true;
+}
+
+// current implementation of object decomposition supports only
+// primitive types (including a recursive type wrapper)
+static bool getBasicIter(void *val, DBusMessageIter *iter, int demand_type) {
+    int type = dBus->dbus_message_iter_get_arg_type(iter);
+    switch (type)
+    {
+        case DBUS_TYPE_INT16:
+        case DBUS_TYPE_UINT16:
+        case DBUS_TYPE_INT32:
+        case DBUS_TYPE_UINT32:
+        case DBUS_TYPE_INT64:
+        case DBUS_TYPE_UINT64:
+        case DBUS_TYPE_DOUBLE:
+        case DBUS_TYPE_BYTE:
+        case DBUS_TYPE_BOOLEAN:
+        case DBUS_TYPE_STRING:
+        {
+            if (type != demand_type) {
+                return false;
+            }
+            dBus->dbus_message_iter_get_basic(iter, val);
+            return true;
+        }
+        case DBUS_TYPE_VARIANT:
+        {
+            DBusMessageIter sub_iter;
+            dBus->dbus_message_iter_recurse(iter, &sub_iter);
+            bool res = getBasicIter(val, &sub_iter, demand_type);
+            // current implementation doesn't support types with multiple fields
+            if (dBus->dbus_message_iter_next(iter)) {
+                return false;
+            }
+            return res;
+        }
+        case DBUS_TYPE_INVALID:
+        default:
+            return false;
+    }
+}
+
+static bool sendDBusMessageWithReply(const char *messages[], int message_count, void *val, int demand_type) {
+    DBusError error;
+    DBusMessage *message = NULL;
+    DBusMessage *reply = NULL;
+    DBusMessageIter iter;
+    bool res = false;
+
+    if (!initialized) {
+        return false;
+    }
+
+    dBus->dbus_error_init(&error);
+    message = dBus->dbus_message_new_method_call(NULL, DESKTOP_PATH, SETTING_INTERFACE, SETTING_INTERFACE_METHOD);
+    if (message == NULL) {
+        printError("DBus error: cannot allocate message\n");
+        goto cleanup;
+    }
+
+    dBus->dbus_message_set_auto_start(message, true);
+    if (!dBus->dbus_message_set_destination(message, DESKTOP_DESTINATION)) {
+        printError("DBus error: cannot set destination\n");
+        goto cleanup;
+    }
+
+    dBus->dbus_message_iter_init_append(message, &iter);
+
+    for (int i = 0; i < message_count; i++) {
+        if (!dBus->dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &messages[i])) {
+            printError("DBus error: cannot append to message\n");
+            goto cleanup;
+        }
+    }
+
+    if ((reply = dBus->dbus_connection_send_with_reply_and_block(connection, message, REPLY_TIMEOUT, &error)) == NULL) {
+        printError("DBus error: cannot get reply or sent message. %s\n", dBus->dbus_error_is_set(&error) ? error.message : "");
+        goto cleanup;
+    }
+
+    if (!dBus->dbus_message_iter_init (reply, &iter)) {
+        printError("DBus error: cannot process message\n");
+        goto cleanup;
+    }
+
+    res = getBasicIter(val, &iter, demand_type);
+
+cleanup:
+    if (reply) {
+        dBus->dbus_message_unref(reply);
+    }
+    if (message) {
+        dBus->dbus_message_unref(message);
+    }
+    return res;
+}
+
+JNIEXPORT jint JNICALL Java_sun_awt_UNIXToolkit_isSystemDarkColorScheme() {
+    static int use_freedesktop_appearance = -1;
+    const char *freedesktop_appearance_messages[] = {"org.freedesktop.appearance", "color-scheme"};
+    const char *gnome_desktop_messages[] = {"org.gnome.desktop.interface", "gtk-theme"};
+
+    if (use_freedesktop_appearance == -1) {
+        unsigned int res = 0;
+        logEnabled = false;
+        use_freedesktop_appearance =
+                sendDBusMessageWithReply(freedesktop_appearance_messages, 2, &res, DBUS_TYPE_UINT32);
+        logEnabled = true;
+    }
+
+    if (use_freedesktop_appearance) {
+        unsigned int res = 0;
+        if (!sendDBusMessageWithReply(freedesktop_appearance_messages, 2, &res, DBUS_TYPE_UINT32)) {
+            return UNKNOWN_RESULT;
+        }
+        return res;
+    } else {
+        char *res = NULL;
+        if (!sendDBusMessageWithReply(gnome_desktop_messages, 2, &res, DBUS_TYPE_STRING)) {
+            return UNKNOWN_RESULT;
+        }
+        return (res != NULL) ? strstr(res, "dark") != NULL : UNKNOWN_RESULT;
+    }
+}
+
+JNIEXPORT void JNICALL Java_sun_awt_UNIXToolkit_toolkitInit() {
+    DBusApi *dBus = DBusApi_setupDBusDefault();
+    if (dBus) {
+        SystemProperties_setup(dBus, env);
+    }
+}

src/java.desktop/unix/native/common/awt/system_properties.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, JetBrains s.r.o.. All rights reserved.
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#ifndef JETBRAINSRUNTIME_SYSTEM_PROPERTIES_H
+#define JETBRAINSRUNTIME_SYSTEM_PROPERTIES_H
+
+#include <stdbool.h>
+#include <jni.h>
+#include <jni_util.h>
+
+#include "dbus_interface.h"
+
+bool SystemProperties_setup(DBusApi *dBus_, JNIEnv *env_);
+void SystemProperties_pullEvent(void);
+
+#endif //JETBRAINSRUNTIME_SYSTEM_PROPERTIES_H

test/jdk/jb/java/awt/Toolkit/DetectingOSThemeTest.java

@@ -0,0 +1,99 @@
+/*
+ * Copyright 2000-2024 JetBrains s.r.o.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.awt.*;
+import java.io.*;
+import java.util.ArrayList;
+import java.util.Arrays;
+
+/**
+ * @test
+ * @summary DetectingOSThemeTest checks that JBR could correctly detect OS theme and notify about theme changing in time
+ * @run main DetectingOSThemeTest
+ * @requires (os.family == "linux")
+ */
+public class DetectingOSThemeTest {
+    private static final int TIME_TO_WAIT = 2000;
+    private static final String LIGHT_THEME_NAME = "Light";
+    private static final String DARK_THEME_NAME = "Dark";
+    private static final String UNDEFINED_THEME_NAME = "Undefined";
+
+    private static String currentTheme() {
+        Boolean val = (Boolean) Toolkit.getDefaultToolkit().getDesktopProperty("awt.os.theme.isDark");
+        if (val == null) {
+            return UNDEFINED_THEME_NAME;
+        }
+        return (val) ? DARK_THEME_NAME : LIGHT_THEME_NAME;
+    }
+
+    private static void setOsDarkTheme(String val) {
+        try {
+            if (val.equals(DARK_THEME_NAME)) {
+                Runtime.getRuntime().exec("gsettings set org.gnome.desktop.interface gtk-theme 'Adwaita-dark'");
+                Runtime.getRuntime().exec("gsettings set org.gnome.desktop.interface color-scheme 'prefer-dark'");
+            } else {
+                Runtime.getRuntime().exec("gsettings set org.gnome.desktop.interface gtk-theme 'Adwaita'");
+                Runtime.getRuntime().exec("gsettings set org.gnome.desktop.interface color-scheme 'default'");
+            }
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private static String currentTheme = null;
+
+    public static void main(String[] args) throws Exception {
+        currentTheme = currentTheme();
+        if (currentTheme.equals(UNDEFINED_THEME_NAME)) {
+            throw new RuntimeException("Test Failed! Cannot detect current OS theme");
+        }
+
+        String initialTheme = currentTheme;
+        try {
+            setOsDarkTheme(LIGHT_THEME_NAME);
+            Thread.sleep(TIME_TO_WAIT);
+            if (!currentTheme().equals(LIGHT_THEME_NAME)) {
+                throw new RuntimeException("Test Failed! Initial OS theme supposed to be Light");
+            }
+
+            String[] themesOrder = {DARK_THEME_NAME, LIGHT_THEME_NAME, DARK_THEME_NAME};
+            Toolkit.getDefaultToolkit().addPropertyChangeListener("awt.os.theme.isDark", evt -> {
+                currentTheme = currentTheme();
+            });
+
+            for (String nextTheme : themesOrder) {
+                setOsDarkTheme(nextTheme);
+                Thread.sleep(TIME_TO_WAIT);
+
+                if (!currentTheme().equals(nextTheme)) {
+                    throw new RuntimeException("Test Failed! OS theme which was set doesn't match with detected");
+                }
+                if (!currentTheme.equals(nextTheme)) {
+                    throw new RuntimeException("Test Failed! Changing OS theme was not detected");
+                }
+            }
+        } finally {
+            setOsDarkTheme(initialTheme);
+        }
+    }
+}