Expose Android sensors to via Mojo services

sky/shell/ui/internals.cc

+// Copyright 2014 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/shell/ui/internals.h"
+
+#include "mojo/public/cpp/application/connect.h"
+#include "mojo/public/cpp/bindings/array.h"
+#include "sky/engine/tonic/dart_builtin.h"
+#include "sky/engine/tonic/dart_converter.h"
+#include "sky/engine/tonic/dart_error.h"
+#include "sky/engine/tonic/dart_state.h"
+
+using namespace blink;
+
+namespace sky {
+namespace shell {
+namespace {
+
+int kInternalsKey = 0;
+
+Internals* GetInternals() {
+  DartState* state = DartState::Current();
+  return static_cast<Internals*>(state->GetUserData(&kInternalsKey));
+}
+
+void TakeServicesProvidedByEmbedder(Dart_NativeArguments args) {
+  Dart_SetIntegerReturnValue(
+      args, GetInternals()->TakeServicesProvidedByEmbedder().value());
+}
+
+const DartBuiltin::Natives kNativeFunctions[] = {
+    {"takeServicesProvidedByEmbedder", TakeServicesProvidedByEmbedder, 0},
+};
+
+const DartBuiltin& GetBuiltin() {
+  static DartBuiltin& builtin = *new DartBuiltin(kNativeFunctions,
+                                                 arraysize(kNativeFunctions));
+  return builtin;
+}
+
+Dart_NativeFunction Resolver(Dart_Handle name,
+                             int argument_count,
+                             bool* auto_setup_scope) {
+  return GetBuiltin().Resolver(name, argument_count, auto_setup_scope);
+}
+
+const uint8_t* Symbolizer(Dart_NativeFunction native_function) {
+  return GetBuiltin().Symbolizer(native_function);
+}
+
+const char kLibraryName[] = "dart:sky.internals";
+const char kLibrarySource[] = R"DART(
+int takeServicesProvidedByEmbedder() native "takeServicesProvidedByEmbedder";
+)DART";
+
+}  // namespace
+
+void Internals::Create(Dart_Isolate isolate,
+                       mojo::ServiceProviderPtr service_provider) {
+  DartState* state = DartState::From(isolate);
+  state->SetUserData(&kInternalsKey, new Internals(service_provider.Pass()));
+  Dart_Handle library =
+      Dart_LoadLibrary(Dart_NewStringFromCString(kLibraryName),
+                       Dart_NewStringFromCString(kLibrarySource), 0, 0);
+  CHECK(!LogIfError(library));
+  CHECK(!LogIfError(Dart_FinalizeLoading(true)));
+  CHECK(!LogIfError(Dart_SetNativeResolver(library, Resolver, Symbolizer)));
+}
+
+Internals::Internals(mojo::ServiceProviderPtr service_provider)
+  : service_provider_(service_provider.Pass()) {
+}
+
+Internals::~Internals() {
+}
+
+mojo::Handle Internals::TakeServicesProvidedByEmbedder() {
+  return service_provider_.PassMessagePipe().release();
+}
+
+}  // namespace shell
+}  // namespace sky