Replace CodeListener with RedwoodView.Root

CHANGELOG.md

@@ -13,6 +13,9 @@ Fixed:
 - Fix a layout bug where children of fixed-with `Row` containers were assigned the wrong width.
 - Fix inconsistencies between iOS and Android for `Column` and `Row` layouts.
 
+Breaking:
+- Replace `CodeListener` with `RedwoodView.Root`. This puts the loading/error/ready state with the UI that displays that state.
+
 
 ## [0.15.0] - 2024-09-30
 [0.15.0]: https://github.com/cashapp/redwood/releases/tag/0.15.0

redwood-compose/src/commonMain/kotlin/app/cash/redwood/compose/RedwoodComposition.kt

@@ -65,7 +65,7 @@ public fun <W : Any> RedwoodComposition(
   widgetSystem: WidgetSystem<W>,
   onEndChanges: () -> Unit = {},
 ): RedwoodComposition {
-  view.reset()
+  view.root.children.remove(0, view.root.children.widgets.size)
 
   val saveableStateRegistry = view.savedStateRegistry?.let { viewRegistry ->
     val state = viewRegistry.consumeRestoredState()
@@ -95,7 +95,7 @@ public fun <W : Any> RedwoodComposition(
 
   return RedwoodComposition(
     scope,
-    view.children,
+    view.root.children,
     view.onBackPressedDispatcher,
     saveableStateRegistry,
     view.uiConfiguration,

redwood-treehouse-host-composeui/api/android/redwood-treehouse-host-composeui.api

@@ -1,4 +1,18 @@
+public class app/cash/redwood/treehouse/composeui/ComposeUiRoot : app/cash/redwood/widget/RedwoodView$Root {
+	public static final field $stable I
+	public fun <init> ()V
+	public fun Render (Landroidx/compose/runtime/Composer;I)V
+	public fun contentState (IZLjava/lang/Throwable;)V
+	public synthetic fun getChildren ()Lapp/cash/redwood/widget/Widget$Children;
+	public fun getChildren ()Lapp/cash/redwood/widget/compose/ComposeWidgetChildren;
+	public fun getModifier ()Lapp/cash/redwood/Modifier;
+	public synthetic fun getValue ()Ljava/lang/Object;
+	public fun getValue ()Lkotlin/jvm/functions/Function2;
+	public fun restart (Lkotlin/jvm/functions/Function0;)V
+	public fun setModifier (Lapp/cash/redwood/Modifier;)V
+}
+
 public final class app/cash/redwood/treehouse/composeui/TreehouseContentKt {
-	public static final fun TreehouseContent (Lapp/cash/redwood/treehouse/TreehouseApp;Lapp/cash/redwood/treehouse/TreehouseView$WidgetSystem;Lapp/cash/redwood/treehouse/TreehouseContentSource;Landroidx/compose/ui/Modifier;Lapp/cash/redwood/treehouse/CodeListener;Landroidx/compose/runtime/Composer;II)V
+	public static final fun TreehouseContent (Lapp/cash/redwood/treehouse/TreehouseApp;Lapp/cash/redwood/treehouse/TreehouseView$WidgetSystem;Lapp/cash/redwood/treehouse/TreehouseContentSource;Landroidx/compose/ui/Modifier;Lkotlin/jvm/functions/Function1;Landroidx/compose/runtime/Composer;II)V
 }
 

redwood-treehouse-host-composeui/api/jvm/redwood-treehouse-host-composeui.api

@@ -1,4 +1,18 @@
+public class app/cash/redwood/treehouse/composeui/ComposeUiRoot : app/cash/redwood/widget/RedwoodView$Root {
+	public static final field $stable I
+	public fun <init> ()V
+	public fun Render (Landroidx/compose/runtime/Composer;I)V
+	public fun contentState (IZLjava/lang/Throwable;)V
+	public synthetic fun getChildren ()Lapp/cash/redwood/widget/Widget$Children;
+	public fun getChildren ()Lapp/cash/redwood/widget/compose/ComposeWidgetChildren;
+	public fun getModifier ()Lapp/cash/redwood/Modifier;
+	public synthetic fun getValue ()Ljava/lang/Object;
+	public fun getValue ()Lkotlin/jvm/functions/Function2;
+	public fun restart (Lkotlin/jvm/functions/Function0;)V
+	public fun setModifier (Lapp/cash/redwood/Modifier;)V
+}
+
 public final class app/cash/redwood/treehouse/composeui/TreehouseContentKt {
-	public static final fun TreehouseContent (Lapp/cash/redwood/treehouse/TreehouseApp;Lapp/cash/redwood/treehouse/TreehouseView$WidgetSystem;Lapp/cash/redwood/treehouse/TreehouseContentSource;Landroidx/compose/ui/Modifier;Lapp/cash/redwood/treehouse/CodeListener;Landroidx/compose/runtime/Composer;II)V
+	public static final fun TreehouseContent (Lapp/cash/redwood/treehouse/TreehouseApp;Lapp/cash/redwood/treehouse/TreehouseView$WidgetSystem;Lapp/cash/redwood/treehouse/TreehouseContentSource;Landroidx/compose/ui/Modifier;Lkotlin/jvm/functions/Function1;Landroidx/compose/runtime/Composer;II)V
 }
 

redwood-treehouse-host-composeui/api/redwood-treehouse-host-composeui.klib.api

@@ -6,4 +6,24 @@
 // - Show declarations: true
 
 // Library unique name: <app.cash.redwood:redwood-treehouse-host-composeui>
-final fun <#A: app.cash.redwood.treehouse/AppService> app.cash.redwood.treehouse.composeui/TreehouseContent(app.cash.redwood.treehouse/TreehouseApp<#A>, app.cash.redwood.treehouse/TreehouseView.WidgetSystem<kotlin/Function2<androidx.compose.runtime/Composer, kotlin/Int, kotlin/Unit>>, app.cash.redwood.treehouse/TreehouseContentSource<#A>, androidx.compose.ui/Modifier?, app.cash.redwood.treehouse/CodeListener?, androidx.compose.runtime/Composer?, kotlin/Int, kotlin/Int) // app.cash.redwood.treehouse.composeui/TreehouseContent|TreehouseContent(app.cash.redwood.treehouse.TreehouseApp<0:0>;app.cash.redwood.treehouse.TreehouseView.WidgetSystem<kotlin.Function2<androidx.compose.runtime.Composer,kotlin.Int,kotlin.Unit>>;app.cash.redwood.treehouse.TreehouseContentSource<0:0>;androidx.compose.ui.Modifier?;app.cash.redwood.treehouse.CodeListener?;androidx.compose.runtime.Composer?;kotlin.Int;kotlin.Int){0§<app.cash.redwood.treehouse.AppService>}[0]
+open class app.cash.redwood.treehouse.composeui/ComposeUiRoot : app.cash.redwood.widget/RedwoodView.Root<kotlin/Function2<androidx.compose.runtime/Composer, kotlin/Int, kotlin/Unit>> { // app.cash.redwood.treehouse.composeui/ComposeUiRoot|null[0]
+    constructor <init>() // app.cash.redwood.treehouse.composeui/ComposeUiRoot.<init>|<init>(){}[0]
+
+    open val children // app.cash.redwood.treehouse.composeui/ComposeUiRoot.children|{}children[0]
+        open fun <get-children>(): app.cash.redwood.widget.compose/ComposeWidgetChildren // app.cash.redwood.treehouse.composeui/ComposeUiRoot.children.<get-children>|<get-children>(){}[0]
+    open val value // app.cash.redwood.treehouse.composeui/ComposeUiRoot.value|{}value[0]
+        open fun <get-value>(): kotlin/Function2<androidx.compose.runtime/Composer, kotlin/Int, kotlin/Unit> // app.cash.redwood.treehouse.composeui/ComposeUiRoot.value.<get-value>|<get-value>(){}[0]
+
+    open var modifier // app.cash.redwood.treehouse.composeui/ComposeUiRoot.modifier|{}modifier[0]
+        open fun <get-modifier>(): app.cash.redwood/Modifier // app.cash.redwood.treehouse.composeui/ComposeUiRoot.modifier.<get-modifier>|<get-modifier>(){}[0]
+        open fun <set-modifier>(app.cash.redwood/Modifier) // app.cash.redwood.treehouse.composeui/ComposeUiRoot.modifier.<set-modifier>|<set-modifier>(app.cash.redwood.Modifier){}[0]
+
+    open fun Render(androidx.compose.runtime/Composer?, kotlin/Int) // app.cash.redwood.treehouse.composeui/ComposeUiRoot.Render|Render(androidx.compose.runtime.Composer?;kotlin.Int){}[0]
+    open fun contentState(kotlin/Int, kotlin/Boolean, kotlin/Throwable?) // app.cash.redwood.treehouse.composeui/ComposeUiRoot.contentState|contentState(kotlin.Int;kotlin.Boolean;kotlin.Throwable?){}[0]
+    open fun restart(kotlin/Function0<kotlin/Unit>?) // app.cash.redwood.treehouse.composeui/ComposeUiRoot.restart|restart(kotlin.Function0<kotlin.Unit>?){}[0]
+}
+
+final val app.cash.redwood.treehouse.composeui/app_cash_redwood_treehouse_composeui_ComposeUiRoot$stableprop // app.cash.redwood.treehouse.composeui/app_cash_redwood_treehouse_composeui_ComposeUiRoot$stableprop|#static{}app_cash_redwood_treehouse_composeui_ComposeUiRoot$stableprop[0]
+
+final fun <#A: app.cash.redwood.treehouse/AppService> app.cash.redwood.treehouse.composeui/TreehouseContent(app.cash.redwood.treehouse/TreehouseApp<#A>, app.cash.redwood.treehouse/TreehouseView.WidgetSystem<kotlin/Function2<androidx.compose.runtime/Composer, kotlin/Int, kotlin/Unit>>, app.cash.redwood.treehouse/TreehouseContentSource<#A>, androidx.compose.ui/Modifier?, kotlin/Function1<kotlinx.coroutines/CoroutineScope, app.cash.redwood.widget/RedwoodView.Root<kotlin/Function2<androidx.compose.runtime/Composer, kotlin/Int, kotlin/Unit>>>?, androidx.compose.runtime/Composer?, kotlin/Int, kotlin/Int) // app.cash.redwood.treehouse.composeui/TreehouseContent|TreehouseContent(app.cash.redwood.treehouse.TreehouseApp<0:0>;app.cash.redwood.treehouse.TreehouseView.WidgetSystem<kotlin.Function2<androidx.compose.runtime.Composer,kotlin.Int,kotlin.Unit>>;app.cash.redwood.treehouse.TreehouseContentSource<0:0>;androidx.compose.ui.Modifier?;kotlin.Function1<kotlinx.coroutines.CoroutineScope,app.cash.redwood.widget.RedwoodView.Root<kotlin.Function2<androidx.compose.runtime.Composer,kotlin.Int,kotlin.Unit>>>?;androidx.compose.runtime.Composer?;kotlin.Int;kotlin.Int){0§<app.cash.redwood.treehouse.AppService>}[0]
+final fun app.cash.redwood.treehouse.composeui/app_cash_redwood_treehouse_composeui_ComposeUiRoot$stableprop_getter(): kotlin/Int // app.cash.redwood.treehouse.composeui/app_cash_redwood_treehouse_composeui_ComposeUiRoot$stableprop_getter|app_cash_redwood_treehouse_composeui_ComposeUiRoot$stableprop_getter(){}[0]

redwood-treehouse-host-composeui/src/commonMain/kotlin/app/cash/redwood/treehouse/composeui/ComposeUiRoot.kt

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2024 Square, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package app.cash.redwood.treehouse.composeui
+
+import androidx.compose.runtime.Composable
+import app.cash.redwood.Modifier
+import app.cash.redwood.widget.RedwoodView
+import app.cash.redwood.widget.compose.ComposeWidgetChildren
+
+/**
+ * A default base implementation of [RedwoodView.Root].
+ *
+ * This composition contributes nothing to the view hierarchy. It delegates directly to its child
+ * views.
+ */
+public open class ComposeUiRoot : RedwoodView.Root<@Composable () -> Unit> {
+  override val children: ComposeWidgetChildren = ComposeWidgetChildren()
+
+  override var modifier: Modifier = Modifier
+
+  override fun contentState(
+    loadCount: Int,
+    attached: Boolean,
+    uncaughtException: Throwable?,
+  ) {
+  }
+
+  override fun restart(restart: (() -> Unit)?) {
+  }
+
+  override val value: @Composable () -> Unit = {
+    Render()
+  }
+
+  @Composable
+  public open fun Render() {
+    children.Render()
+  }
+}

redwood-treehouse-host-composeui/src/commonMain/kotlin/app/cash/redwood/treehouse/composeui/TreehouseContent.kt

@@ -23,6 +23,7 @@ import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.layout.onSizeChanged
@@ -31,7 +32,6 @@ import androidx.compose.ui.platform.LocalLayoutDirection
 import androidx.compose.ui.unit.LayoutDirection
 import app.cash.redwood.composeui.safeAreaInsets
 import app.cash.redwood.treehouse.AppService
-import app.cash.redwood.treehouse.CodeListener
 import app.cash.redwood.treehouse.StateSnapshot
 import app.cash.redwood.treehouse.TreehouseApp
 import app.cash.redwood.treehouse.TreehouseContentSource
@@ -45,8 +45,9 @@ import app.cash.redwood.ui.OnBackPressedDispatcher
 import app.cash.redwood.ui.Size
 import app.cash.redwood.ui.UiConfiguration
 import app.cash.redwood.ui.dp as redwoodDp
+import app.cash.redwood.widget.RedwoodView
 import app.cash.redwood.widget.SavedStateRegistry
-import app.cash.redwood.widget.compose.ComposeWidgetChildren
+import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.flow.MutableStateFlow
 
 @Composable
@@ -55,9 +56,10 @@ public fun <A : AppService> TreehouseContent(
   widgetSystem: WidgetSystem<@Composable () -> Unit>,
   contentSource: TreehouseContentSource<A>,
   modifier: Modifier = Modifier,
-  codeListener: CodeListener = remember { CodeListener() },
+  root: ((CoroutineScope) -> RedwoodView.Root<@Composable () -> Unit>) = { _ -> ComposeUiRoot() },
 ) {
   val onBackPressedDispatcher = platformOnBackPressedDispatcher()
+  val scope = rememberCoroutineScope()
 
   var viewportSize: Size? by remember { mutableStateOf(null) }
   val density = LocalDensity.current
@@ -71,10 +73,9 @@ public fun <A : AppService> TreehouseContent(
       LayoutDirection.Rtl -> RedwoodLayoutDirection.Rtl
     },
   )
-
   val treehouseView = remember(widgetSystem) {
     object : TreehouseView<@Composable () -> Unit> {
-      override val children = ComposeWidgetChildren()
+      override val root: RedwoodView.Root<@Composable () -> Unit> = root(scope)
       override val onBackPressedDispatcher = onBackPressedDispatcher
       override val uiConfiguration = MutableStateFlow(uiConfiguration)
 
@@ -86,14 +87,13 @@ public fun <A : AppService> TreehouseContent(
       override var readyForContentChangeListener: ReadyForContentChangeListener<@Composable () -> Unit>? = null
       override var saveCallback: TreehouseView.SaveCallback? = null
       override val stateSnapshotId = StateSnapshot.Id(null)
-      override fun reset() = children.remove(0, children.widgets.size)
     }
   }
   LaunchedEffect(treehouseView, uiConfiguration) {
     treehouseView.uiConfiguration.value = uiConfiguration
   }
-  DisposableEffect(treehouseView, contentSource, codeListener) {
-    val closeable = contentSource.bindWhenReady(treehouseView, treehouseApp, codeListener)
+  DisposableEffect(treehouseView, contentSource) {
+    val closeable = contentSource.bindWhenReady(treehouseView, treehouseApp)
     onDispose {
       closeable.close()
     }
@@ -106,7 +106,7 @@ public fun <A : AppService> TreehouseContent(
       }
     },
   ) {
-    treehouseView.children.Render()
+    treehouseView.root.value()
   }
 }
 

redwood-treehouse-host/api/android/redwood-treehouse-host.api

@@ -3,13 +3,6 @@ public final class app/cash/redwood/treehouse/ChangeListRenderer {
 	public final fun render-rqC_l18 (Lapp/cash/redwood/treehouse/TreehouseView;Ljava/util/List;)V
 }
 
-public class app/cash/redwood/treehouse/CodeListener {
-	public fun <init> ()V
-	public fun onCodeDetached (Lapp/cash/redwood/treehouse/TreehouseApp;Lapp/cash/redwood/treehouse/TreehouseView;Ljava/lang/Throwable;)V
-	public fun onCodeLoaded (Lapp/cash/redwood/treehouse/TreehouseApp;Lapp/cash/redwood/treehouse/TreehouseView;Z)V
-	public fun onInitialCodeLoading (Lapp/cash/redwood/treehouse/TreehouseApp;Lapp/cash/redwood/treehouse/TreehouseView;)V
-}
-
 public abstract interface class app/cash/redwood/treehouse/Content {
 	public abstract fun awaitContent (ILkotlin/coroutines/Continuation;)Ljava/lang/Object;
 	public static synthetic fun awaitContent$default (Lapp/cash/redwood/treehouse/Content;ILkotlin/coroutines/Continuation;ILjava/lang/Object;)Ljava/lang/Object;
@@ -20,8 +13,7 @@ public abstract interface class app/cash/redwood/treehouse/Content {
 
 public final class app/cash/redwood/treehouse/ContentBindingKt {
 	public static final fun bindWhenReady (Lapp/cash/redwood/treehouse/Content;Lapp/cash/redwood/treehouse/TreehouseView;)Ljava/io/Closeable;
-	public static final fun bindWhenReady (Lapp/cash/redwood/treehouse/TreehouseContentSource;Lapp/cash/redwood/treehouse/TreehouseView;Lapp/cash/redwood/treehouse/TreehouseApp;Lapp/cash/redwood/treehouse/CodeListener;)Ljava/io/Closeable;
-	public static synthetic fun bindWhenReady$default (Lapp/cash/redwood/treehouse/TreehouseContentSource;Lapp/cash/redwood/treehouse/TreehouseView;Lapp/cash/redwood/treehouse/TreehouseApp;Lapp/cash/redwood/treehouse/CodeListener;ILjava/lang/Object;)Ljava/io/Closeable;
+	public static final fun bindWhenReady (Lapp/cash/redwood/treehouse/TreehouseContentSource;Lapp/cash/redwood/treehouse/TreehouseView;Lapp/cash/redwood/treehouse/TreehouseApp;)Ljava/io/Closeable;
 }
 
 public class app/cash/redwood/treehouse/EventListener {
@@ -82,8 +74,7 @@ public abstract interface class app/cash/redwood/treehouse/StateStore {
 public abstract class app/cash/redwood/treehouse/TreehouseApp : java/lang/AutoCloseable {
 	public fun <init> ()V
 	public abstract fun close ()V
-	public abstract fun createContent (Lapp/cash/redwood/treehouse/TreehouseContentSource;Lapp/cash/redwood/treehouse/CodeListener;)Lapp/cash/redwood/treehouse/Content;
-	public static synthetic fun createContent$default (Lapp/cash/redwood/treehouse/TreehouseApp;Lapp/cash/redwood/treehouse/TreehouseContentSource;Lapp/cash/redwood/treehouse/CodeListener;ILjava/lang/Object;)Lapp/cash/redwood/treehouse/Content;
+	public abstract fun createContent (Lapp/cash/redwood/treehouse/TreehouseContentSource;)Lapp/cash/redwood/treehouse/Content;
 	public abstract fun getDispatchers ()Lapp/cash/redwood/treehouse/TreehouseDispatchers;
 	public abstract fun getName ()Ljava/lang/String;
 	public abstract fun getZipline ()Lkotlinx/coroutines/flow/StateFlow;
@@ -126,8 +117,8 @@ public abstract interface class app/cash/redwood/treehouse/TreehouseDispatchers
 }
 
 public final class app/cash/redwood/treehouse/TreehouseLayout : app/cash/redwood/widget/RedwoodLayout, app/cash/redwood/treehouse/TreehouseView {
-	public fun <init> (Landroid/content/Context;Lapp/cash/redwood/treehouse/TreehouseView$WidgetSystem;Landroidx/activity/OnBackPressedDispatcher;)V
-	public synthetic fun generateDefaultLayoutParams ()Landroid/view/ViewGroup$LayoutParams;
+	public fun <init> (Landroid/content/Context;Lapp/cash/redwood/treehouse/TreehouseView$WidgetSystem;Landroidx/activity/OnBackPressedDispatcher;Lapp/cash/redwood/widget/RedwoodView$Root;)V
+	public synthetic fun <init> (Landroid/content/Context;Lapp/cash/redwood/treehouse/TreehouseView$WidgetSystem;Landroidx/activity/OnBackPressedDispatcher;Lapp/cash/redwood/widget/RedwoodView$Root;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
 	public fun getReadyForContent ()Z
 	public fun getReadyForContentChangeListener ()Lapp/cash/redwood/treehouse/TreehouseView$ReadyForContentChangeListener;
 	public fun getSaveCallback ()Lapp/cash/redwood/treehouse/TreehouseView$SaveCallback;