Make //blimp/client/app a real embedder of //blimp/client/public

blimp/client/app/android/blimp_environment.cc

+// Copyright 2016 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 "blimp/client/app/android/blimp_environment.h"
+
+#include <memory>
+
+#include "base/android/apk_assets.h"
+#include "base/command_line.h"
+#include "base/files/file.h"
+#include "base/files/memory_mapped_file.h"
+#include "base/threading/thread.h"
+#include "blimp/client/app/android/blimp_client_context_delegate_android.h"
+#include "blimp/client/app/blimp_startup.h"
+#include "blimp/client/public/blimp_client_context.h"
+#include "blimp/client/support/compositor/compositor_dependencies_impl.h"
+#include "components/pref_registry/pref_registry_syncable.h"
+#include "components/prefs/command_line_pref_store.h"
+#include "components/prefs/in_memory_pref_store.h"
+#include "components/prefs/pref_service.h"
+#include "components/prefs/pref_service_factory.h"
+#include "jni/BlimpEnvironment_jni.h"
+#include "ui/base/resource/resource_bundle.h"
+
+namespace blimp {
+namespace client {
+namespace {
+
+class BlimpShellCommandLinePrefStore : public CommandLinePrefStore {
+ public:
+  explicit BlimpShellCommandLinePrefStore(const base::CommandLine* command_line)
+      : CommandLinePrefStore(command_line) {
+    BlimpClientContext::ApplyBlimpSwitches(this);
+  }
+
+ protected:
+  ~BlimpShellCommandLinePrefStore() override = default;
+};
+
+void InitializeResourceBundle() {
+  base::MemoryMappedFile::Region pak_region;
+  int pak_fd =
+      base::android::OpenApkAsset("assets/blimp_shell.pak", &pak_region);
+  DCHECK_GE(pak_fd, 0);
+  ui::ResourceBundle::InitSharedInstanceWithPakFileRegion(base::File(pak_fd),
+                                                          pak_region);
+}
+
+}  // namespace
+
+// DelegatingCompositorDependencies delegates all calls to the public API
+// to its delegate. When it is destructed it informs the BlimpEnvironment that
+// it is going away to ensure that the BlimpEnvironment can know how many
+// DelegatingCompositorDependencies are outstanding.
+class DelegatingCompositorDependencies : public CompositorDependencies {
+ public:
+  DelegatingCompositorDependencies(
+      CompositorDependencies* delegate_compositor_dependencies,
+      BlimpEnvironment* blimp_environment)
+      : delegate_compositor_dependencies_(delegate_compositor_dependencies),
+        blimp_environment_(blimp_environment) {}
+
+  ~DelegatingCompositorDependencies() override {
+    blimp_environment_->DecrementOutstandingCompositorDependencies();
+  }
+
+  gpu::GpuMemoryBufferManager* GetGpuMemoryBufferManager() override {
+    return delegate_compositor_dependencies_->GetGpuMemoryBufferManager();
+  }
+
+  cc::SurfaceManager* GetSurfaceManager() override {
+    return delegate_compositor_dependencies_->GetSurfaceManager();
+  }
+
+  cc::FrameSinkId AllocateFrameSinkId() override {
+    return delegate_compositor_dependencies_->AllocateFrameSinkId();
+  }
+
+  void GetContextProviders(const ContextProviderCallback& callback) override {
+    delegate_compositor_dependencies_->GetContextProviders(callback);
+  }
+
+ private:
+  CompositorDependencies* delegate_compositor_dependencies_;
+  BlimpEnvironment* blimp_environment_;
+
+  DISALLOW_COPY_AND_ASSIGN(DelegatingCompositorDependencies);
+};
+
+BlimpEnvironment::BlimpEnvironment() {
+  InitializeResourceBundle();
+
+  io_thread_ = base::MakeUnique<base::Thread>("BlimpIOThread");
+  base::Thread::Options options;
+  options.message_loop_type = base::MessageLoop::TYPE_IO;
+  io_thread_->StartWithOptions(options);
+
+  // Create PrefRegistry and register blimp preferences with it.
+  scoped_refptr<user_prefs::PrefRegistrySyncable> pref_registry =
+      new ::user_prefs::PrefRegistrySyncable();
+  BlimpClientContext::RegisterPrefs(pref_registry.get());
+
+  // Create command line and user preference stores.
+  PrefServiceFactory pref_service_factory;
+  pref_service_factory.set_command_line_prefs(
+      make_scoped_refptr(new BlimpShellCommandLinePrefStore(
+          base::CommandLine::ForCurrentProcess())));
+  pref_service_factory.set_user_prefs(new InMemoryPrefStore());
+
+  // Create a PrefService binding the PrefRegistry to the pref stores.
+  // The PrefService owns the PrefRegistry and pref stores.
+  std::unique_ptr<PrefService> pref_service =
+      pref_service_factory.Create(pref_registry.get());
+
+  // Create the real CompositorDependencies. This is used for minting
+  // CompositorDependencies to callers of CreateCompositorDepencencies().
+  compositor_dependencies_ = base::MakeUnique<CompositorDependenciesImpl>();
+
+  context_ = base::WrapUnique<BlimpClientContext>(BlimpClientContext::Create(
+      io_thread_->task_runner(), io_thread_->task_runner(),
+      CreateCompositorDepencencies(), pref_service.get()));
+
+  context_delegate_ =
+      base::MakeUnique<BlimpClientContextDelegateAndroid>(context_.get());
+}
+
+BlimpEnvironment::~BlimpEnvironment() {
+  DCHECK_EQ(0, outstanding_compositor_dependencies_);
+  context_.reset();
+  compositor_dependencies_.reset();
+}
+
+void BlimpEnvironment::Destroy(JNIEnv*,
+                               const base::android::JavaParamRef<jobject>&) {
+  delete this;
+}
+
+// static
+BlimpEnvironment* BlimpEnvironment::FromJavaObject(
+    JNIEnv* env,
+    const base::android::JavaRef<jobject>& jobj) {
+  return reinterpret_cast<BlimpEnvironment*>(
+      Java_BlimpEnvironment_getNativePtr(env, jobj));
+}
+
+base::android::ScopedJavaLocalRef<jobject>
+BlimpEnvironment::GetBlimpClientContext(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jobject>& jobj) {
+  DCHECK(context_);
+  return BlimpClientContext::GetJavaObject(context_.get());
+}
+
+std::unique_ptr<CompositorDependencies>
+BlimpEnvironment::CreateCompositorDepencencies() {
+  outstanding_compositor_dependencies_++;
+  return base::MakeUnique<DelegatingCompositorDependencies>(
+      compositor_dependencies_.get(), this);
+}
+
+void BlimpEnvironment::DecrementOutstandingCompositorDependencies() {
+  outstanding_compositor_dependencies_--;
+  DCHECK_GE(0, outstanding_compositor_dependencies_);
+}
+
+static jlong Init(JNIEnv* env,
+                  const base::android::JavaParamRef<jobject>& obj) {
+  BlimpEnvironment* blimp_environment = new BlimpEnvironment(/*env, obj*/);
+  return reinterpret_cast<intptr_t>(blimp_environment);
+}
+
+// static
+bool BlimpEnvironment::RegisterJni(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+}  // namespace client
+}  // namespace blimp