[cros] Initial implementation for OOBE WebUI.

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

Index: chrome/browser/ui/webui/chromeos/login/oobe_ui.cc
diff --git a/chrome/browser/ui/webui/chromeos/login/oobe_ui.cc b/chrome/browser/ui/webui/chromeos/login/oobe_ui.cc
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+++ b/chrome/browser/ui/webui/chromeos/login/oobe_ui.cc
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+// Copyright (c) 2011 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/oobe_ui.h"
+
+#include <string>
+
+#include "base/logging.h"
+#include "base/memory/weak_ptr.h"
+#include "base/string_piece.h"
+#include "base/values.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/webui/chrome_url_data_manager.h"
+#include "chrome/common/jstemplate_builder.h"
+#include "chrome/common/url_constants.h"
+#include "content/browser/browser_thread.h"
+#include "content/browser/tab_contents/tab_contents.h"
+#include "grit/browser_resources.h"
+#include "grit/chromium_strings.h"
+#include "grit/generated_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/resource/resource_bundle.h"
+
+namespace {
+
+// JS API callbacks names.
+const char kJsApiScreenStateInitialize[] = "screenStateInitialize";
+
+// Page JS API function names.
+const char kJsApiScreenStateChanged[] = "cr.ui.Oobe.screenStateChanged";
+
+// OOBE screen state variables which are passed to the page.
+const char kState[] = "state";
+
+}  // namespace
+
+namespace chromeos {
+
+class OobeUIHTMLSource : public ChromeURLDataManager::DataSource {
+ public:
+  OobeUIHTMLSource();
+
+  // Called when the network layer has requested a resource underneath
+  // the path we registered.
+  virtual void StartDataRequest(const std::string& path,
+                                bool is_incognito,
+                                int request_id);
+  virtual std::string GetMimeType(const std::string&) const {
+    return "text/html";
+  }
+
+ private:
+  virtual ~OobeUIHTMLSource() {}
+
+  std::string service_path_;
+  DISALLOW_COPY_AND_ASSIGN(OobeUIHTMLSource);
+};
+
+// The handler for Javascript messages related to the "oobe" view.
+class OobeHandler : public WebUIMessageHandler,
+                    public base::SupportsWeakPtr<OobeHandler> {
+ public:
+  OobeHandler();
+  virtual ~OobeHandler();
+
+  // Init work after Attach.
+  void Init(TabContents* contents);
+
+  // WebUIMessageHandler implementation.
+  virtual WebUIMessageHandler* Attach(WebUI* web_ui);
+  virtual void RegisterMessages();
+
+ private:
+  // Should keep this state enum in sync with similar one in JS code.
+  typedef enum ScreenState {
+    SCREEN_LOADING = -1,
+    SCREEN_NONE    =  0,
+    SCREEN_WELCOME =  1,
+    SCREEN_EULA    =  2,
+    SCREEN_UPDATE  =  3,
+  } ScreenState;
+
+  class TaskProxy : public base::RefCountedThreadSafe<TaskProxy> {
+   public:
+    explicit TaskProxy(const base::WeakPtr<OobeHandler>& handler)
+        : handler_(handler) {
+    }
+
+    void HandleInitialize() {
+      if (handler_)
+        handler_->InitializeScreenState();
+    }
+
+   private:
+    base::WeakPtr<OobeHandler> handler_;
+
+    DISALLOW_COPY_AND_ASSIGN(TaskProxy);
+  };
+
+  // Handlers for JS WebUI messages.
+  void HandleScreenStateInitialize(const ListValue* args);
+
+  // Initializes current OOBE state, passes that to page.
+  void InitializeScreenState();
+
+  // Updates page states.
+  void UpdatePage();
+
+  TabContents* tab_contents_;
+  ScreenState state_;
+
+  DISALLOW_COPY_AND_ASSIGN(OobeHandler);
+};
+
+// OobeUIHTMLSource -------------------------------------------------------
+
+OobeUIHTMLSource::OobeUIHTMLSource()
+    : DataSource(chrome::kChromeUIOobeHost, MessageLoop::current()) {
+}
+
+void OobeUIHTMLSource::StartDataRequest(const std::string& path,
+                                        bool is_incognito,
+                                        int request_id) {
+  DictionaryValue strings;
+  // OOBE title is not actually seen in UI, use title of the welcome screen.
+  strings.SetString("title",
+                    l10n_util::GetStringUTF16(IDS_NETWORK_SELECTION_TITLE));
+  strings.SetString("welcomeScreenTitle",
+                    l10n_util::GetStringFUTF16(IDS_WELCOME_SCREEN_TITLE,
+                        l10n_util::GetStringUTF16(IDS_SHORT_PRODUCT_NAME)));
+  strings.SetString("languageSelect",
+                    l10n_util::GetStringUTF16(IDS_LANGUAGE_SELECTION_SELECT));
+  strings.SetString("keyboardSelect",
+                    l10n_util::GetStringUTF16(IDS_KEYBOARD_SELECTION_SELECT));
+  strings.SetString("networkSelect",
+                    l10n_util::GetStringUTF16(IDS_NETWORK_SELECTION_SELECT));
+  strings.SetString("continue",
+      l10n_util::GetStringUTF16(IDS_NETWORK_SELECTION_CONTINUE_BUTTON));
+  strings.SetString("eulaScreenTitle",
+                    l10n_util::GetStringFUTF16(IDS_EULA_SCREEN_TITLE,
+                        l10n_util::GetStringUTF16(IDS_SHORT_PRODUCT_NAME)));
+  strings.SetString("checkboxLogging",
+      l10n_util::GetStringUTF16(IDS_EULA_CHECKBOX_ENABLE_LOGGING));
+  strings.SetString("learnMore",
+                    l10n_util::GetStringUTF16(IDS_LEARN_MORE));
+  strings.SetString("back",
+                    l10n_util::GetStringUTF16(IDS_EULA_BACK_BUTTON));
+  strings.SetString("acceptAgreement",
+      l10n_util::GetStringUTF16(IDS_EULA_ACCEPT_AND_CONTINUE_BUTTON));
+  SetFontAndTextDirection(&strings);
+
+  static const base::StringPiece html(
+      ResourceBundle::GetSharedInstance().GetRawDataResource(IDR_OOBE_HTML));
+
+  const std::string& full_html = jstemplate_builder::GetI18nTemplateHtml(
+      html, &strings);
+
+  scoped_refptr<RefCountedBytes> html_bytes(new RefCountedBytes());
+  html_bytes->data.resize(full_html.size());
+  std::copy(full_html.begin(), full_html.end(), html_bytes->data.begin());
+
+  SendResponse(request_id, html_bytes);
+}
+
+// OobeHandler ------------------------------------------------------------
+
+OobeHandler::OobeHandler()
+    : tab_contents_(NULL),
+      state_(SCREEN_LOADING) {
+}
+
+OobeHandler::~OobeHandler() {
+}
+
+WebUIMessageHandler* OobeHandler::Attach(WebUI* web_ui) {
+  return WebUIMessageHandler::Attach(web_ui);
+}
+
+void OobeHandler::Init(TabContents* contents) {
+  tab_contents_ = contents;
+}
+
+void OobeHandler::RegisterMessages() {
+  web_ui_->RegisterMessageCallback(kJsApiScreenStateInitialize,
+      NewCallback(this, &OobeHandler::HandleScreenStateInitialize));
+}
+
+void OobeHandler::HandleScreenStateInitialize(const ListValue* args) {
+  const size_t kScreenStateInitializeParamCount = 0;
+  if (args->GetSize() != kScreenStateInitializeParamCount) {
+    NOTREACHED();
+    return;
+  }
+  scoped_refptr<TaskProxy> task = new TaskProxy(AsWeakPtr());
+  BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
+      NewRunnableMethod(task.get(), &TaskProxy::HandleInitialize));
+}
+
+void OobeHandler::InitializeScreenState() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  // TODO(nkostylev): Integrated with OOBE flow, controllers.
+  state_ = SCREEN_WELCOME;
+  UpdatePage();
+}
+
+void OobeHandler::UpdatePage() {
+  DictionaryValue screen_info_dict;
+  VLOG(1) << "New state: " << state_;
+  screen_info_dict.SetInteger(kState, state_);
+  web_ui_->CallJavascriptFunction(kJsApiScreenStateChanged, screen_info_dict);
+}
+
+// OobeUI ----------------------------------------------------------------------
+
+OobeUI::OobeUI(TabContents* contents) : WebUI(contents) {
+  OobeHandler* handler = new OobeHandler();
+  AddMessageHandler((handler)->Attach(this));
+  handler->Init(contents);
+  OobeUIHTMLSource* html_source = new OobeUIHTMLSource();
+
+  // Set up the chrome://oobe/ source.
+  contents->profile()->GetChromeURLDataManager()->AddDataSource(html_source);
+}
+
+}  // namespace chromeos