Teach SkyView how to load the main script

sky/engine/core/script/dart_controller.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "sky/engine/config.h"
 #include "sky/engine/core/script/dart_controller.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 34 matching lines @@
   "--enable_asserts",
   "--enable_type_checks",
   "--error_on_bad_type",
   "--error_on_bad_override",
 };
 #endif
 
 extern const uint8_t* kDartVmIsolateSnapshotBuffer;
 extern const uint8_t* kDartIsolateSnapshotBuffer;
 
-DartController::DartController() {
+DartController::DartController() : weak_factory_(this) {
 }
 
 DartController::~DartController() {
 }
 
 bool DartController::ImportChildLibraries(AbstractModule* module,
                                           Dart_Handle library) {
   // If the document has never seen an <import> tag, it won't have an import
   // controller, and thus will return null for its root HTMLImport.  We could
   // remove this null-check by always creating an ImportController.
@@ skipping 34 matching lines @@
 
   if (LogIfError(library))
     return nullptr;
 
   if (!ImportChildLibraries(module, library))
     return nullptr;
 
   return library;
 }
 
+void DartController::DidLoadMainLibrary(KURL url) {
+  DCHECK(Dart_CurrentIsolate() == dart_state()->isolate());
+  DartApiScope dart_api_scope;
+
+  Dart_Handle library = Dart_LookupLibrary(
+      StringToDart(dart_state(), url.string()));
+  CHECK(!LogIfError(library));
+  DartInvokeAppField(library, ToDart("main"), 0, nullptr);
+}
+
+void DartController::LoadMainLibrary(const KURL& url) {
+  DartLoader& loader = dart_state()->loader();
+  DartDependencyCatcher dependency_catcher(loader);
+  loader.LoadLibrary(url);
+  loader.WaitForDependencies(dependency_catcher.dependencies(),
+                             base::Bind(&DartController::DidLoadMainLibrary, weak_factory_.GetWeakPtr(), url));
+}
+
 void DartController::LoadScriptInModule(
     AbstractModule* module,
     const String& source,
     const TextPosition& position,
     const LoadFinishedCallback& finished_callback) {
   DartIsolateScope isolate_scope(dart_state()->isolate());
   DartApiScope dart_api_scope;
 
   DartDependencyCatcher dependency_catcher(dart_state()->loader());
   Dart_Handle library_handle = CreateLibrary(module, source, position);
@@ skipping 233 matching lines @@
                         nullptr,  // Isolate interrupt callback.
                         UnhandledExceptionCallback, IsolateShutdownCallback,
                         // File IO callbacks.
                         nullptr, nullptr, nullptr, nullptr, nullptr));
   // Wait for load port- ensures handle watcher and service isolates are
   // running.
   Dart_ServiceWaitForLoadPort();
 }
 
 } // namespace blink