Implement ComponentExtensionIMEManagerDelegate.

chrome/browser/chromeos/input_method/component_extension_ime_manager_impl.cc

+// Copyright 2013 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 "chrome/browser/chromeos/input_method/component_extension_ime_manager_impl.h"
+
+#include "base/logging.h"
+#include "chrome/browser/extensions/component_loader.h"
+#include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/extensions/extension_system.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/common/extensions/extension_file_util.h"
+#include "chrome/common/extensions/extension_l10n_util.h"
+#include "chrome/common/extensions/extension_manifest_constants.h"
+
+namespace chromeos {
+
+namespace {
+
+struct WhitelistedComponentExtensionIME {
+  const char* id;
+  const char* path;
+} whitelisted_component_extension[] = {
+  {
+    "fpfbhcjppmaeaijcidgiibchfbnhbelj",
+    "/usr/share/chromeos-assets/input_methods/nacl_mozc",
+  },
+};
+
+extensions::ComponentLoader* GetComponentLoader() {
+  Profile* profile = ProfileManager::GetDefaultProfileOrOffTheRecord();
+  extensions::ExtensionSystem* extension_system =
+      extensions::ExtensionSystem::Get(profile);
+  ExtensionService* extension_service = extension_system->extension_service();
+  return  extension_service->component_loader();

[Zachary Kuznia, 2013/03/25 06:33:05]

nit: one space after return.

[Seigo Nonaka, 2013/03/25 09:28:50]

Done.

+}
+}  // namespace
+
+ComponentExtentionIMEManagerImpl::ComponentExtentionIMEManagerImpl()
+    : is_initialized_(false),
+      weak_ptr_factory_(this) {
+}
+
+ComponentExtentionIMEManagerImpl::~ComponentExtentionIMEManagerImpl() {
+}
+
+std::vector<ComponentExtensionIME> ComponentExtentionIMEManagerImpl::ListIME() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  return component_extension_list_;
+}
+
+bool ComponentExtentionIMEManagerImpl::Load(const std::string& extension_id,
+                                            const base::FilePath& file_path) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  if (loaded_extension_id_.find(extension_id) != loaded_extension_id_.end())
+    return false;
+  const std::string loaded_extension_id =
+      GetComponentLoader()->AddOrReplace(file_path);
+  DCHECK_EQ(loaded_extension_id, extension_id);
+  loaded_extension_id_.insert(extension_id);
+  return true;
+}
+
+bool ComponentExtentionIMEManagerImpl::Unload(const std::string& extension_id,
+                                              const base::FilePath& file_path) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  if (loaded_extension_id_.find(extension_id) == loaded_extension_id_.end())
+    return false;
+  GetComponentLoader()->Remove(extension_id);
+  loaded_extension_id_.erase(extension_id);
+  return true;
+}
+
+scoped_ptr<DictionaryValue> ComponentExtentionIMEManagerImpl::GetManifest(
+    const base::FilePath& file_path) {
+  std::string error;
+  scoped_ptr<DictionaryValue> manifest(
+      extension_file_util::LoadManifest(file_path, &error));
+  if (!manifest.get())
+    LOG(ERROR) << "Failed at getting manifest";
+  if (!extension_l10n_util::LocalizeExtension(file_path,
+                                              manifest.get(),
+                                              &error))
+    LOG(ERROR) << "Localization failed";
+
+  return manifest.Pass();
+}
+
+void ComponentExtentionIMEManagerImpl::Initialize(
+    const scoped_refptr<base::SequencedTaskRunner>& file_task_runner,
+    const base::Closure& callback) {
+  DCHECK(!is_initialized_);
+  std::vector<ComponentExtensionIME>* component_extension_ime_list
+      = new std::vector<ComponentExtensionIME>;
+  file_task_runner->PostTaskAndReply(
+      FROM_HERE,
+      base::Bind(&ComponentExtentionIMEManagerImpl::ReadComponentExtensionsInfo,
+                 base::Unretained(component_extension_ime_list)),
+      base::Bind(
+          &ComponentExtentionIMEManagerImpl::OnReadComponentExtensionsInfo,
+          weak_ptr_factory_.GetWeakPtr(),
+          base::Owned(component_extension_ime_list),
+          callback));
+}
+
+bool ComponentExtentionIMEManagerImpl::IsInitialized() {
+  return is_initialized_;
+}
+
+bool ComponentExtentionIMEManagerImpl::ReadEngineComponent(
+    const DictionaryValue& dict,
+    IBusComponent::EngineDescription* out) {

[Zachary Kuznia, 2013/03/25 06:33:05]

DCHECK(BrowserThread::FILE)

[Seigo Nonaka, 2013/03/25 09:28:50]

Done.

+  DCHECK(out);
+  std::string type;
+  if (!dict.GetString(extension_manifest_keys::kType, &type))
+    return false;
+  if (type != "ime")
+    return false;
+  if (!dict.GetString(extension_manifest_keys::kId, &out->engine_id))
+    return false;
+  if (!dict.GetString(extension_manifest_keys::kName, &out->display_name))
+    return false;
+  if (!dict.GetString(extension_manifest_keys::kLanguage, &out->language_code))
+    return false;
+
+  const ListValue* layouts = NULL;
+  if (!dict.GetList(extension_manifest_keys::kLayouts, &layouts))
+    return false;
+
+  if (layouts->GetSize() > 0) {
+    if (!layouts->GetString(0, &out->layout))
+      return false;
+  }
+  return true;
+}
+
+bool ComponentExtentionIMEManagerImpl::ReadExtensionInfo(
+    const DictionaryValue& manifest,
+    ComponentExtensionIME* out) {

[Zachary Kuznia, 2013/03/25 06:33:05]

DCHECK(BrowserThread::FILE)

[Seigo Nonaka, 2013/03/25 09:28:50]

Done.

+  if (!manifest.GetString(extension_manifest_keys::kDescription,
+                          &out->description))
+    return false;
+  // TODO(nona): option page handling.
+  return true;
+}
+
+void ComponentExtentionIMEManagerImpl::ReadComponentExtensionsInfo(

[Zachary Kuznia, 2013/03/25 06:33:05]

DCHECK(BrowserThread::FILE)

[Seigo Nonaka, 2013/03/25 09:28:50]

Done.

+    std::vector<ComponentExtensionIME>* out_imes) {
+  DCHECK(out_imes);
+  for (size_t i = 0; i < arraysize(whitelisted_component_extension); ++i) {
+    const base::FilePath extension_path = base::FilePath(
+        whitelisted_component_extension[i].path);
+
+    scoped_ptr<DictionaryValue> manifest = GetManifest(extension_path);
+    if (!manifest.get())
+      continue;
+
+    ComponentExtensionIME component_ime;
+    if (!ReadExtensionInfo(*manifest.get(), &component_ime))
+      continue;
+
+    const ListValue* component_list;
+    if (!manifest->GetList(extension_manifest_keys::kInputComponents,
+                           &component_list))
+      continue;
+
+    for (size_t i = 0; i < component_list->GetSize(); ++i) {
+      const DictionaryValue* dictionary;
+      if (!component_list->GetDictionary(i, &dictionary))
+        continue;
+
+      IBusComponent::EngineDescription engine;
+      ReadEngineComponent(*dictionary, &engine);
+      component_ime.engines.push_back(engine);
+    }
+    out_imes->push_back(component_ime);
+  }
+}
+
+void ComponentExtentionIMEManagerImpl::OnReadComponentExtensionsInfo(
+    std::vector<ComponentExtensionIME>* result,
+    const base::Closure& callback) {
+  DCHECK(result);

[Zachary Kuznia, 2013/03/25 06:33:05]

DCHECK(BrowserThread::UI), too.

[Seigo Nonaka, 2013/03/25 09:28:50]

Done.

+  component_extension_list_ = *result;

[Zachary Kuznia, 2013/03/25 06:33:05]

This is accessed on other threads, so this could be a race.

[Seigo Nonaka, 2013/03/25 09:28:50]

|component_extension_list_| is accessed on only UI thread.
And |result| is only referred from OnReadComponentExtensionsInfo and
ReadComponentExtensionsInfo. And they are called with PostTaskAndReply, so it is
guaranteed that OnReadComponentExtensionsInfo accesses after
ReadComponentExtensionsInfo is finished.
On 2013/03/25 06:33:05, Zachary Kuznia wrote:

+  is_initialized_ = true;
+  callback.Run();
+}
+
+}  // namespace chromeos