JBR-7087 Wayland: Desktop support via GNOME

Author: mkartashev

src/java.desktop/unix/classes/sun/awt/wl/WLDesktopPeer.java

@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2025, 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.
+ */
+package sun.awt.wl;
+
+import sun.awt.SunToolkit;
+import sun.awt.UNIXToolkit;
+
+import java.awt.Desktop;
+import java.io.File;
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URI;
+
+import java.awt.Desktop.Action;
+import java.awt.peer.DesktopPeer;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class WLDesktopPeer implements DesktopPeer {
+
+    // supportedActions may be changed from native within the init() call
+    private static final List<Desktop.Action> supportedActions
+            = new ArrayList<>(Arrays.asList(Action.OPEN, Action.MAIL, Action.BROWSE));
+
+    private static boolean nativeLibraryLoaded = false;
+    private static boolean initExecuted = false;
+
+    private static void initWithLock(){
+        SunToolkit.awtLock();
+        try {
+            if (!initExecuted) {
+                nativeLibraryLoaded = init(
+                        UNIXToolkit.getEnabledGtkVersion().getNumber(),
+                        UNIXToolkit.isGtkVerbose());
+            }
+        } finally {
+            initExecuted = true;
+            SunToolkit.awtUnlock();
+        }
+    }
+
+    WLDesktopPeer(){
+        initWithLock();
+    }
+
+    static boolean isDesktopSupported() {
+        initWithLock();
+        return nativeLibraryLoaded && !supportedActions.isEmpty();
+    }
+
+    public boolean isSupported(Action type) {
+        return supportedActions.contains(type);
+    }
+
+    public void open(File file) throws IOException {
+        try {
+            launch(file.toURI());
+        } catch (MalformedURLException e) {
+            throw new IOException(file.toString());
+        }
+    }
+
+    public void edit(File file) throws IOException {
+        throw new UnsupportedOperationException("The current platform " +
+                "doesn't support the EDIT action.");
+    }
+
+    public void print(File file) throws IOException {
+        throw new UnsupportedOperationException("The current platform " +
+                "doesn't support the PRINT action.");
+    }
+
+    public void mail(URI uri) throws IOException {
+        launch(uri);
+    }
+
+    public void browse(URI uri) throws IOException {
+        launch(uri);
+    }
+
+    private void launch(URI uri) throws IOException {
+        byte[] uriByteArray = ( uri.toString() + '\0' ).getBytes();
+        boolean result = false;
+        SunToolkit.awtLock();
+        try {
+            if (!nativeLibraryLoaded) {
+                throw new IOException("Failed to load native libraries.");
+            }
+            result = gnome_url_show(uriByteArray);
+        } finally {
+            SunToolkit.awtUnlock();
+        }
+        if (!result) {
+            throw new IOException("Failed to show URI:" + uri);
+        }
+    }
+
+    private native boolean gnome_url_show(byte[] url);
+    private static native boolean init(int gtkVersion, boolean verbose);
+}

src/java.desktop/unix/classes/sun/awt/wl/WLToolkit.java

@@ -973,18 +973,12 @@ public void ungrab(Window w) {
      */
     @Override
     public boolean isDesktopSupported() {
-        if (log.isLoggable(PlatformLogger.Level.FINE)) {
-            log.fine("Not implemented: WLToolkit.isDesktopSupported()");
-        }
-        return false;
+        return WLDesktopPeer.isDesktopSupported();
     }
 
     @Override
     public DesktopPeer createDesktopPeer(Desktop target) {
-        if (log.isLoggable(PlatformLogger.Level.FINE)) {
-            log.fine("Not implemented: WLToolkit.createDesktopPeer()");
-        }
-        return null;
+        return new WLDesktopPeer();
     }
 
     @Override

src/java.desktop/unix/native/libawt_wlawt/awt_Desktop.c

@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2025, 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.
+ */
+
+#ifdef HEADLESS
+    #error This file should not be included in headless library
+#endif
+
+#include <dlfcn.h>
+
+#include <jni.h>
+#include <jvm_md.h>
+
+#include "Trace.h"
+#include "jni_util.h"
+#include "gtk_interface.h"
+
+typedef gboolean (GNOME_URL_SHOW_TYPE)(const char *, void **);
+typedef gboolean (GNOME_VFS_INIT_TYPE)(void);
+
+static GNOME_URL_SHOW_TYPE *gnome_url_show = NULL;
+
+static gboolean gnome_load(void) {
+     void *vfs_handle;
+     void *gnome_handle;
+     const char *errmsg;
+     GNOME_VFS_INIT_TYPE *gnome_vfs_init;
+
+     vfs_handle = dlopen(VERSIONED_JNI_LIB_NAME("gnomevfs-2", "0"), RTLD_LAZY);
+     if (vfs_handle == NULL) {
+         vfs_handle = dlopen(JNI_LIB_NAME("gnomevfs-2"), RTLD_LAZY);
+         if (vfs_handle == NULL) {
+             J2dTraceLn(J2D_TRACE_ERROR, "can not load libgnomevfs-2.so");
+             return FALSE;
+         }
+     }
+     dlerror(); /* Clear errors */
+     gnome_vfs_init = dlsym(vfs_handle, "gnome_vfs_init");
+     if (gnome_vfs_init == NULL){
+         J2dTraceLn(J2D_TRACE_ERROR, "dlsym( gnome_vfs_init) returned NULL");
+         return FALSE;
+     }
+     if ((errmsg = dlerror()) != NULL) {
+         J2dTraceLn1(J2D_TRACE_ERROR, "can not find symbol gnome_vfs_init %s", errmsg);
+         return FALSE;
+     }
+     // call gonme_vfs_init()
+     (*gnome_vfs_init)();
+
+     gnome_handle = dlopen(VERSIONED_JNI_LIB_NAME("gnome-2", "0"), RTLD_LAZY);
+     if (gnome_handle == NULL) {
+         gnome_handle = dlopen(JNI_LIB_NAME("gnome-2"), RTLD_LAZY);
+         if (gnome_handle == NULL) {
+             J2dTraceLn(J2D_TRACE_ERROR, "can not load libgnome-2.so");
+             return FALSE;
+         }
+     }
+     dlerror(); /* Clear errors */
+     gnome_url_show = dlsym(gnome_handle, "gnome_url_show");
+     if ((errmsg = dlerror()) != NULL) {
+         J2dTraceLn(J2D_TRACE_ERROR, "can not find symble gnome_url_show");
+         return FALSE;
+     }
+     return TRUE;
+}
+
+static gboolean gtk_has_been_loaded = FALSE;
+static gboolean gnome_has_been_loaded = FALSE;
+
+JNIEXPORT jboolean JNICALL Java_sun_awt_wl_WLDesktopPeer_init
+  (JNIEnv *env, jclass cls, jint version, jboolean verbose)
+{
+    if (gtk_has_been_loaded || gnome_has_been_loaded) {
+        return JNI_TRUE;
+    }
+
+    if (gtk_load(env, version, verbose) && gtk->show_uri_load(env)) {
+        gtk_has_been_loaded = TRUE;
+        return JNI_TRUE;
+    } else if (gnome_load()) {
+        gnome_has_been_loaded = TRUE;
+        return JNI_TRUE;
+    }
+
+    return JNI_FALSE;
+}
+
+JNIEXPORT jboolean JNICALL Java_sun_awt_wl_WLDesktopPeer_gnome_1url_1show
+  (JNIEnv *env, jobject obj, jbyteArray url_j)
+{
+    gboolean success = FALSE;
+    const gchar* url_c = (gchar*)(*env)->GetByteArrayElements(env, url_j, NULL);
+    if (url_c == NULL) {
+        JNU_ThrowOutOfMemoryError(env, 0);
+        return JNI_FALSE;
+    }
+
+    if (gtk_has_been_loaded) {
+        gtk->gdk_threads_enter();
+        success = gtk->gtk_show_uri_on_window(NULL, url_c, GDK_CURRENT_TIME, NULL);
+        gtk->gdk_threads_leave();
+    } else if (gnome_has_been_loaded) {
+        success = (*gnome_url_show)(url_c, NULL);
+    }
+
+    (*env)->ReleaseByteArrayElements(env, url_j, (jbyte*)url_c, 0);
+
+    return success ? JNI_TRUE : JNI_FALSE;
+}
+