cros: Break BaseScreenHandler into two classes.

chrome/browser/ui/webui/chromeos/login/base_screen_handler.cc

 // Copyright (c) 2012 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/ui/webui/chromeos/login/base_screen_handler.h"
 
-#include "base/logging.h"
-#include "base/memory/ptr_util.h"
-#include "base/values.h"
-#include "chrome/browser/chromeos/login/screens/base_screen.h"
-#include "chrome/browser/chromeos/login/ui/login_display_host.h"
-#include "chrome/browser/ui/webui/chromeos/login/oobe_ui.h"
-#include "components/login/localized_values_builder.h"
-#include "content/public/browser/web_ui.h"
-
 namespace chromeos {
 
-namespace {
-const char kMethodContextChanged[] = "contextChanged";
-}  // namespace
+BaseScreenHandler::BaseScreenHandler(OobeScreen oobe_screen)
+    : oobe_screen_(oobe_screen) {}
 
-BaseScreenHandler::BaseScreenHandler() = default;
-
-BaseScreenHandler::~BaseScreenHandler() {
-  if (base_screen_)
-    base_screen_->set_model_view_channel(nullptr);
-}
-
-void BaseScreenHandler::InitializeBase() {
-  page_is_ready_ = true;
-  Initialize();
-  if (!pending_context_changes_.empty()) {
-    CommitContextChanges(pending_context_changes_);
-    pending_context_changes_.Clear();
-  }
-}
-
-void BaseScreenHandler::GetLocalizedStrings(base::DictionaryValue* dict) {
-  auto builder = base::MakeUnique<::login::LocalizedValuesBuilder>(dict);
-  DeclareLocalizedValues(builder.get());
-  GetAdditionalParameters(dict);
-}
-
-void BaseScreenHandler::RegisterMessages() {
-  AddPrefixedCallback("userActed",
-                      &BaseScreenHandler::HandleUserAction);
-  AddPrefixedCallback("contextChanged",
-                      &BaseScreenHandler::HandleContextChanged);
-  DeclareJSCallbacks();
-}
-
-void BaseScreenHandler::CommitContextChanges(
-    const base::DictionaryValue& diff) {
-  if (!page_is_ready())
-    pending_context_changes_.MergeDictionary(&diff);
-  else
-    CallJS(kMethodContextChanged, diff);
-}
-
-void BaseScreenHandler::GetAdditionalParameters(base::DictionaryValue* dict) {
-}
-
-void BaseScreenHandler::CallJS(const std::string& method) {
-  web_ui()->CallJavascriptFunctionUnsafe(FullMethodPath(method));
-}
-
-void BaseScreenHandler::ShowScreen(OobeScreen screen) {
-  ShowScreenWithData(screen, nullptr);
-}
-
-void BaseScreenHandler::ShowScreenWithData(OobeScreen screen,
-                                           const base::DictionaryValue* data) {
-  if (!web_ui())
-    return;
-  base::DictionaryValue screen_params;
-  screen_params.SetString("id", GetOobeScreenName(screen));
-  if (data)
-    screen_params.SetWithoutPathExpansion("data", data->DeepCopy());
-  web_ui()->CallJavascriptFunctionUnsafe("cr.ui.Oobe.showScreen",
-                                         screen_params);
-}
-
-OobeUI* BaseScreenHandler::GetOobeUI() const {
-  return static_cast<OobeUI*>(web_ui()->GetController());
-}
-
-OobeScreen BaseScreenHandler::GetCurrentScreen() const {
-  OobeUI* oobe_ui = GetOobeUI();
-  if (!oobe_ui)
-    return OobeScreen::SCREEN_UNKNOWN;
-  return oobe_ui->current_screen();
-}
-
-gfx::NativeWindow BaseScreenHandler::GetNativeWindow() {
-  return LoginDisplayHost::default_host()->GetNativeWindow();
-}
-
-void BaseScreenHandler::SetBaseScreen(BaseScreen* base_screen) {
-  if (base_screen_ == base_screen)
-    return;
-  if (base_screen_)
-    base_screen_->set_model_view_channel(nullptr);
-  base_screen_ = base_screen;
-  if (base_screen_)
-    base_screen_->set_model_view_channel(this);
-}
-
-std::string BaseScreenHandler::FullMethodPath(const std::string& method) const {
-  DCHECK(!method.empty());
-  return js_screen_path_prefix_ + method;
-}
-
-void BaseScreenHandler::HandleUserAction(const std::string& action_id) {
-  if (base_screen_)
-    base_screen_->OnUserAction(action_id);
-}
-
-void BaseScreenHandler::HandleContextChanged(
-    const base::DictionaryValue* diff) {
-  if (diff && base_screen_)
-    base_screen_->OnContextChanged(*diff);
-}
+BaseScreenHandler::~BaseScreenHandler() {}
 
 }  // namespace chromeos