Kotlin UI DSL: easy way to disable sub rows

platform/credential-store/src/PasswordSafeConfigurable.kt

@@ -145,7 +145,7 @@ internal class PasswordSafeConfigurableUi : ConfigurableUi<PasswordSafeSettings>
   fun getCurrentDbFile() = keePassDbFile.text.trim().nullize()?.let { Paths.get(it) }
 
   fun updateEnabledState() {
-    modeToRow[ProviderType.KEEPASS]?.enabled = getProviderType() == ProviderType.KEEPASS
+    modeToRow[ProviderType.KEEPASS]?.subRowsEnabled = getProviderType() == ProviderType.KEEPASS
   }
 
   override fun getComponent(): JPanel {
@@ -163,7 +163,7 @@ internal class PasswordSafeConfigurableUi : ConfigurableUi<PasswordSafeSettings>
           }
         }
 
-        row {
+        modeToRow[ProviderType.KEEPASS] = row {
           inKeePass()
           row("Database:") {
             keePassDbFile = textFieldWithBrowseButton("KeePass Database File",
@@ -193,7 +193,7 @@ internal class PasswordSafeConfigurableUi : ConfigurableUi<PasswordSafeSettings>
                 }
             )
           }
-          modeToRow[ProviderType.KEEPASS] = row("Master Password:") {
+          row("Master Password:") {
             keePassMasterPassword(growPolicy = GrowPolicy.SHORT_TEXT)
           }
         }

platform/platform-impl/src/com/intellij/ui/layout/LayoutBuilder.kt

@@ -25,8 +25,10 @@ class LayoutBuilder(val `$`: LayoutBuilderImpl, val buttonGroup: ButtonGroup? =
     row(label = Label(label), init = init)
   }
 
-  inline fun row(label: JLabel? = null, separated: Boolean = false, init: Row.() -> Unit) {
-    `$`.newRow(label, buttonGroup, separated).init()
+  inline fun row(label: JLabel? = null, separated: Boolean = false, init: Row.() -> Unit): Row {
+    val row = `$`.newRow(label, buttonGroup, separated)
+    row.init()
+    return row
   }
 
   /**

platform/platform-impl/src/com/intellij/ui/layout/MigLayoutBuilder.kt

@@ -182,7 +182,7 @@ private fun addGrowIfNeed(cc: CC, component: Component) {
 }
 
 private class MigLayoutRow(private val componentConstraints: MutableMap<Component, CC>,
-                           private val builder: MigLayoutBuilder,
+                           override val builder: LayoutBuilderImpl,
                            val labeled: Boolean = false,
                            val noGrid: Boolean = false,
                            private val buttonGroup: ButtonGroup? = null,
@@ -191,6 +191,11 @@ private class MigLayoutRow(private val componentConstraints: MutableMap<Componen
   val components = SmartList<Component>()
   var rightIndex = Int.MAX_VALUE
 
+  private var _subRows: MutableList<Row>? = null
+
+  override val subRows: List<Row>
+    get() = _subRows ?: emptyList()
+
   override var enabled: Boolean = true
     get() = field
     set(value) {
@@ -204,6 +209,17 @@ private class MigLayoutRow(private val componentConstraints: MutableMap<Componen
       }
     }
 
+  override var subRowsEnabled: Boolean = true
+    get() = field
+    set(value) {
+      if (field == value) {
+        return
+      }
+
+      field = value
+      _subRows?.forEach { it.enabled = value }
+    }
+
   override operator fun JComponent.invoke(vararg constraints: CCFlags, gapLeft: Int, growPolicy: GrowPolicy?) {
     addComponent(this, constraints, gapLeft = gapLeft, growPolicy = growPolicy)
   }
@@ -226,9 +242,12 @@ private class MigLayoutRow(private val componentConstraints: MutableMap<Componen
     rightIndex = components.size
   }
 
-  override fun row(label: String, init: Row.() -> Unit): Row {
+  override fun createRow(label: String): Row {
     val row = builder.newRow(Label(label), indented = true)
-    row.init()
+    if (_subRows == null) {
+      _subRows = SmartList()
+    }
+    _subRows!!.add(row)
     return row
   }
 }

platform/platform-impl/src/com/intellij/ui/layout/Row.kt

@@ -45,6 +45,12 @@ import javax.swing.JLabel
 abstract class Row() {
   abstract var enabled: Boolean
 
+  abstract var subRowsEnabled: Boolean
+
+  abstract val subRows: List<Row>
+
+  protected abstract val builder: LayoutBuilderImpl
+
   fun label(text: String, gapLeft: Int = 0, style: ComponentStyle? = null, fontColor: FontColor? = null, bold: Boolean = false) {
     Label(text, style, fontColor, bold)(gapLeft = gapLeft)
   }
@@ -113,7 +119,13 @@ abstract class Row() {
 
   protected abstract fun alignRight()
 
-  abstract fun row(label: String, init: Row.() -> Unit): Row
+  inline fun row(label: String, init: Row.() -> Unit): Row {
+    val row = createRow(label)
+    row.init()
+    return row
+  }
+
+  protected abstract fun createRow(label: String): Row
 
   @Deprecated(message = "Nested row is prohibited", level = DeprecationLevel.ERROR)
   fun row(label: JLabel? = null, init: Row.() -> Unit) {