Add TabGuiDsl activeTab provider

Author: NichtStudioCode

invui-kotlin/src/main/kotlin/xyz/xenondevs/invui/dsl/IngredientsDsl.kt

@@ -52,7 +52,7 @@ sealed interface IngredientsDsl {
 
     fun scrollInventoriesGui(vararg structure: String, gui: ScrollGuiDsl<Inventory>.() -> Unit): ScrollGui<Inventory>
 
-    fun tabGui(vararg structure: String, gui: TabGuiDsl.() -> Unit): TabGui
+    fun <G : Gui> tabGui(vararg structure: String, gui: TabGuiDsl<G>.() -> Unit): TabGui
 
 }
 
@@ -119,7 +119,7 @@ internal open class IngredientsDslImpl(
     override fun scrollInventoriesGui(vararg structure: String, gui: ScrollGuiDsl<Inventory>.() -> Unit): ScrollGui<Inventory> =
         ScrollGuiDslImpl.Inventories(structure, presets + ingredients.build()).apply(gui).build()
 
-    override fun tabGui(vararg structure: String, gui: TabGuiDsl.() -> Unit): TabGui =
-        TabGuiDslImpl(structure, presets + ingredients.build()).apply(gui).build()
+    override fun <G : Gui> tabGui(vararg structure: String, gui: TabGuiDsl<G>.() -> Unit): TabGui =
+        TabGuiDslImpl<G>(structure, presets + ingredients.build()).apply(gui).build()
 
 }

invui-kotlin/src/main/kotlin/xyz/xenondevs/invui/dsl/TabGuiDsl.kt

@@ -2,42 +2,55 @@
 
 package xyz.xenondevs.invui.dsl
 
+import xyz.xenondevs.commons.provider.Provider
+import xyz.xenondevs.commons.provider.flatten
+import xyz.xenondevs.commons.provider.mutableProvider
+import xyz.xenondevs.commons.provider.provider
 import xyz.xenondevs.invui.ExperimentalReactiveApi
 import xyz.xenondevs.invui.dsl.property.MutableProviderDslProperty
 import xyz.xenondevs.invui.dsl.property.ProviderDslProperty
 import xyz.xenondevs.invui.gui.Gui
 import xyz.xenondevs.invui.gui.IngredientPreset
 import xyz.xenondevs.invui.gui.TabGui
+import xyz.xenondevs.invui.gui.activeTabProvider
 import xyz.xenondevs.invui.gui.setTab
 import xyz.xenondevs.invui.gui.setTabs
 
 @ExperimentalDslApi
-fun tabGui(vararg structure: String, gui: TabGuiDsl.() -> Unit): TabGui =
-    TabGuiDslImpl(structure).apply(gui).build()
+fun <G : Gui> tabGui(vararg structure: String, gui: TabGuiDsl<G>.() -> Unit): TabGui =
+    TabGuiDslImpl<G>(structure).apply(gui).build()
 
 @ExperimentalDslApi
-sealed interface TabGuiDsl : GuiDsl {
+sealed interface TabGuiDsl<G : Gui> : GuiDsl {
 
-    val tabs: ProviderDslProperty<List<Gui?>>
+    val tabs: ProviderDslProperty<List<G?>>
     val tab: MutableProviderDslProperty<Int>
+    val activeTab: Provider<G?>
 
 }
 
 @ExperimentalDslApi
-internal class TabGuiDslImpl(
+internal class TabGuiDslImpl<G: Gui>(
     structure: Array<out String>,
     presets: List<IngredientPreset> = emptyList()
-) : GuiDslImpl<TabGui, TabGui.Builder>(structure, presets), TabGuiDsl {
+) : GuiDslImpl<TabGui, TabGui.Builder>(structure, presets), TabGuiDsl<G> {
 
-    override val tabs = ProviderDslProperty(emptyList<Gui?>())
+    private val internalActiveTab = mutableProvider { provider<G?>(null) }
+    
+    override val tabs = ProviderDslProperty(emptyList<G?>())
     override val tab = MutableProviderDslProperty(-1)
+    override val activeTab = internalActiveTab.flatten()
 
     override fun createBuilder() = TabGui.builder()
 
     override fun applyToBuilder(builder: TabGui.Builder) {
         super.applyToBuilder(builder)
         builder.setTabs(tabs)
         builder.setTab(tab)
+        builder.addModifier { gui ->
+            @Suppress("UNCHECKED_CAST")
+            internalActiveTab.set(gui.activeTabProvider as Provider<G?>)
+        }
     }
 
 }