IJPL-171343 IdeStatusBarImpl has a leak of a widget component

GitOrigin-RevId: f9c0799e71ab982a65b13f8fb27a774942d64b85

platform/platform-impl/src/com/intellij/openapi/wm/impl/status/IdeStatusBarImpl.kt

@@ -99,7 +99,7 @@ open class IdeStatusBarImpl @ApiStatus.Internal constructor(
   private val widgetMap = LinkedHashMap<String, WidgetBean>()
   private var leftPanel: JPanel? = null
 
-  private val rightPanelLayout = GridBagLayout()
+  private var rightPanelLayout = GridBagLayout()
   private val rightPanel: JPanel
 
   private val centerPanel: JPanel
@@ -747,6 +747,7 @@ open class IdeStatusBarImpl @ApiStatus.Internal constructor(
 
         val targetPanel = getTargetPanel(bean.position)
         targetPanel.remove(bean.component)
+        recreateLayoutIfIsEmptyRightPanel(targetPanel)
         targetPanel.revalidate()
         Disposer.dispose(bean.widget)
         fireWidgetRemoved(id)
@@ -755,6 +756,17 @@ open class IdeStatusBarImpl @ApiStatus.Internal constructor(
     }
   }
 
+  private fun recreateLayoutIfIsEmptyRightPanel(panel: JPanel) {
+    if (panel !== rightPanel && panel.components.none { it.isVisible }) return
+
+    // Workaround of a bug in AWT:
+    // GridBagLayout.componentAdjusting is not set to NULL after removing the last visible child component.
+    // That leads to a leak of the StatusBarWidget component, and that leads to a situation when the plugin can't be properly unloaded.
+    rightPanelLayout = GridBagLayout()
+    panel.layout = rightPanelLayout
+    sortRightWidgets()
+  }
+
   override fun updateWidget(id: String) {
     EdtInvocationManager.invokeLaterIfNeeded {
       val widgetComponent = getWidgetComponent(id)