SPARK-2361: Migrate to Dorkbox for system tray support

[guusdk]

The current Spark system tray integration relies on java.awt.SystemTray and TrayIcon, which exhibit inconsistent behavior across platforms—particularly on Linux distributions using GNOME or Wayland—resulting in missing icons, limited menu support, and unreliable tooltip rendering.

To improve cross-platform stability and user experience, we will migrate to the Dorkbox SystemTray library (com.dorkbox.SystemTray). This library provides:

• Broader platform support (Windows, macOS, Linux with AppIndicator, GtkStatusIcon, and Swing fallbacks)
• Auto-detection and fallback handling for modern desktop environments
• Enhanced menu options (Swing and native)
• Better icon scaling and DPI handling
• Configurable shutdown hooks and improved tray cleanup

Benefits:

• Reliable tray visibility on Linux (GNOME, Ubuntu, etc.)
• Consistent icon and tooltip behavior across all supported OSes
• Richer tray menu customization options

[stokito]

When staring from IDE the exception occured:

SEVERE: An exception occurred while initializing plugin org.jivesoftware.sparkimpl.plugin.systray.SysTrayPlugin@44ce7d60
kotlin.jvm.KotlinReflectionNotSupportedError: Kotlin reflection implementation is not found at runtime. Make sure you have kotlin-reflect.jar in the classpath
	at kotlin.jvm.internal.ClassReference.error(ClassReference.kt:79)
	at kotlin.jvm.internal.ClassReference.getQualifiedName(ClassReference.kt:15)
	at dorkbox.updates.Updates.<clinit>(Updates.kt:25)
	at dorkbox.os.OS.<clinit>(OS.kt:34)
	at dorkbox.systemTray.SystemTray.<clinit>(SystemTray.java:101)
	at org.jivesoftware.sparkimpl.plugin.systray.SysTrayPlugin.initialize(SysTrayPlugin.java:89)
	at org.jivesoftware.spark.PluginManager.lambda$initializePlugins$1(PluginManager.java:769)

Maybe I need to fix something on my side but I was surprised to see the kotlin-stdlib. I checked all dependencies:

\- com.dorkbox:SystemTray:jar:4.4:provided
     +- com.dorkbox:Collections:jar:2.4:provided
     +- com.dorkbox:Executor:jar:3.13:provided
     |  +- org.jetbrains.kotlin:kotlin-stdlib:jar:1.8.0:provided
     |  |  +- org.jetbrains.kotlin:kotlin-stdlib-common:jar:1.8.0:provided
     |  |  \- org.jetbrains:annotations:jar:13.0:provided
     |  \- org.jetbrains.kotlinx:kotlinx-coroutines-jdk8:jar:1.7.1:provided
     +- com.dorkbox:Desktop:jar:1.1:provided
     +- com.dorkbox:JNA:jar:1.2:provided
     +- com.dorkbox:OS:jar:1.8:provided
     +- com.dorkbox:Updates:jar:1.1:provided
     +- com.dorkbox:Utilities:jar:1.46:provided
     |  +- org.jetbrains.kotlinx:kotlinx-coroutines-core-jvm:jar:1.7.3:provided
     |  \- com.fasterxml.uuid:java-uuid-generator:jar:4.2.0:provided
     +- org.javassist:javassist:jar:3.29.2-GA:provided
     +- net.java.dev.jna:jna-jpms:jar:5.13.0:provided
     +- net.java.dev.jna:jna-platform-jpms:jar:5.13.0:provided
     \- org.jetbrains.kotlin:kotlin-stdlib-jdk8:jar:1.8.0:provided
        \- org.jetbrains.kotlin:kotlin-stdlib-jdk7:jar:1.8.0:provided

Looks like too many dependencies.

The tray looks working for me on Windows 8, Ubuntu Mate, Ubuntu GNOME Flashback. Maybe the change is not so critical.

[guusdk]

That dependency seems to be non-optional (at least in Dorkbox 4.4). I've created an issue for that in dorkbox/SystemTray#229 .

Even when providing that dependency in Spark, Dorkbox seems to hang indefinitely, at least on my Ubuntu environment. There are various other issues in their GitHub project that seem related - some of which suggest that the problem is fixed in unreleased code.

For now, lets hold off on merging this.