Add support for child view on Fuchsia (#3217)

content_handler/rasterizer.cc

@@ -64,9 +64,10 @@ void Rasterizer::Draw(std::unique_ptr<flow::LayerTree> layer_tree,
     root_node->op->set_image(mozart::ImageNodeOp::New());
     root_node->op->get_image()->content_rect = bounds.Clone();
     root_node->op->get_image()->image_resource_id = kContentImageResourceId;
-    update->nodes.insert(kRootNodeId, std::move(root_node));
 
     layer_tree->UpdateScene(update.get(), root_node.get());
+
+    update->nodes.insert(kRootNodeId, std::move(root_node));
   } else {
     update->nodes.insert(kRootNodeId, mozart::Node::New());
   }

content_handler/runtime_holder.cc

@@ -173,6 +173,7 @@ void RuntimeHolder::DidCreateMainIsolate(Dart_Isolate isolate) {
   if (asset_store_)
     blink::AssetFontSelector::Install(asset_store_);
   InitFidlInternal();
+  InitMozartInternal();
 }
 
 void RuntimeHolder::InitFidlInternal() {
@@ -200,6 +201,18 @@ void RuntimeHolder::InitFidlInternal() {
       DartConverter<mx::channel>::ToDart(outgoing_services_.PassChannel())));
 }
 
+void RuntimeHolder::InitMozartInternal() {
+  fidl::InterfaceHandle<mozart::ViewContainer> view_container;
+  view_->GetContainer(fidl::GetProxy(&view_container));
+
+  Dart_Handle mozart_internal =
+      Dart_LookupLibrary(ToDart("dart:mozart.internal"));
+
+  DART_CHECK_VALID(Dart_SetField(
+      mozart_internal, ToDart("_viewContainer"),
+      DartConverter<mx::channel>::ToDart(view_container.PassHandle())));
+}
+
 void RuntimeHolder::InitRootBundle(std::vector<char> bundle) {
   root_bundle_data_ = std::move(bundle);
   asset_store_ = ftl::MakeRefCounted<blink::ZipAssetStore>(

content_handler/runtime_holder.h

@@ -63,6 +63,7 @@ class RuntimeHolder : public blink::RuntimeDelegate,
   void HandleAssetPlatformMessage(ftl::RefPtr<blink::PlatformMessage> message);
 
   void InitFidlInternal();
+  void InitMozartInternal();
 
   void BeginFrame();
   void OnFrameComplete();

lib/io/dart_io.h

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef FLUTTER_TONIC_DART_IO_H_
-#define FLUTTER_TONIC_DART_IO_H_
+#ifndef FLUTTER_LIB_IO_DART_IO_H_
+#define FLUTTER_LIB_IO_DART_IO_H_
 
 #include "lib/ftl/macros.h"
 
@@ -19,4 +19,4 @@ class DartIO {
 
 }  // namespace blink
 
-#endif  // FLUTTER_TONIC_DART_IO_H_
+#endif  // FLUTTER_LIB_IO_DART_IO_H_

lib/snapshot/BUILD.gn

@@ -9,6 +9,7 @@ import("//flutter/lib/ui/dart_ui.gni")
 target_is_fuchsia = target_os == "fuchsia"
 
 if (target_is_fuchsia) {
+  import("//apps/mozart/lib/flutter/sdk_ext/sdk_ext.gni")
   import("//lib/fidl/dart/sdk_ext/sdk_ext.gni")
 }
 
@@ -81,9 +82,13 @@ action("generate_snapshot_bin") {
   ]
 
   if (target_is_fuchsia) {
-    inputs += fidl_dart_sdk_ext_files
+    inputs += fidl_dart_sdk_ext_files + mozart_dart_sdk_ext_files
     fidl_internal_path = rebase_path(fidl_dart_sdk_ext_lib)
-    args += [ "--url_mapping=dart:fidl.internal,$fidl_internal_path" ]
+    mozart_internal_path = rebase_path(mozart_dart_sdk_ext_lib)
+    args += [
+      "--url_mapping=dart:fidl.internal,$fidl_internal_path",
+      "--url_mapping=dart:mozart.internal,$mozart_internal_path",
+    ]
   }
 }
 

lib/snapshot/snapshot_fuchsia.dart

@@ -11,5 +11,6 @@ import 'dart:fidl.internal';
 import 'dart:io';
 import 'dart:isolate';
 import 'dart:math';
+import 'dart:mozart.internal';
 import 'dart:typed_data';
 import 'dart:ui';