chrome/browser/chromeos/login/webui_login

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This source file includes following definitions.
forward_keyboard_event_
Init
GetClassName
GetWebContentsModalDialogHost
GetHostView
GetDialogPosition
GetMaximumDialogSize
AddObserver
RemoveObserver
AcceleratorPressed
GetNativeWindow
LoadURL
GetWebUI
GetWebContents
OpenProxySettings
OnPostponedShow
SetStatusAreaVisible
SetUIEnabled
Layout
OnLocaleChanged
ChildPreferredSizeChanged
AboutToRequestFocusFromTabTraversal
Observe
HandleContextMenu
HandleKeyboardEvent
IsPopupOrPanel
TakeFocus
RequestMediaAccessPermission
PreHandleGestureEvent
DidFailProvisionalLoad
OnLoginPromptVisible
ReturnFocus
// 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/chromeos/login/webui_login_view.h"

#include "ash/shell.h"
#include "ash/system/tray/system_tray.h"
#include "base/bind.h"
#include "base/callback.h"
#include "base/debug/trace_event.h"
#include "base/i18n/rtl.h"
#include "base/strings/utf_string_conversions.h"
#include "base/values.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/chromeos/accessibility/accessibility_util.h"
#include "chrome/browser/chromeos/login/login_display_host_impl.h"
#include "chrome/browser/chromeos/login/proxy_settings_dialog.h"
#include "chrome/browser/chromeos/login/webui_login_display.h"
#include "chrome/browser/chromeos/profiles/profile_helper.h"
#include "chrome/browser/extensions/chrome_extension_web_contents_observer.h"
#include "chrome/browser/media/media_stream_infobar_delegate.h"
#include "chrome/browser/password_manager/chrome_password_manager_client.h"
#include "chrome/browser/renderer_preferences_util.h"
#include "chrome/browser/ui/webui/chromeos/login/oobe_ui.h"
#include "chrome/common/render_messages.h"
#include "chromeos/dbus/dbus_thread_manager.h"
#include "chromeos/dbus/session_manager_client.h"
#include "chromeos/network/network_state.h"
#include "chromeos/network/network_state_handler.h"
#include "components/password_manager/core/browser/password_manager.h"
#include "components/web_modal/web_contents_modal_dialog_manager.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/render_widget_host_view.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_view.h"
#include "content/public/browser/web_ui.h"
#include "third_party/WebKit/public/web/WebInputEvent.h"
#include "ui/gfx/rect.h"
#include "ui/gfx/size.h"
#include "ui/views/controls/webview/webview.h"
#include "ui/views/widget/widget.h"

using content::NativeWebKeyboardEvent;
using content::RenderViewHost;
using content::WebContents;
using web_modal::WebContentsModalDialogManager;

namespace {

// These strings must be kept in sync with handleAccelerator()
// in display_manager.js.
const char kAccelNameCancel[] = "cancel";
const char kAccelNameEnrollment[] = "enrollment";
const char kAccelNameKioskEnable[] = "kiosk_enable";
const char kAccelNameVersion[] = "version";
const char kAccelNameReset[] = "reset";
const char kAccelFocusPrev[] = "focus_prev";
const char kAccelFocusNext[] = "focus_next";
const char kAccelNameDeviceRequisition[] = "device_requisition";
const char kAccelNameDeviceRequisitionRemora[] = "device_requisition_remora";
const char kAccelNameAppLaunchBailout[] = "app_launch_bailout";
const char kAccelNameAppLaunchNetworkConfig[] = "app_launch_network_config";

// A class to change arrow key traversal behavior when it's alive.
class ScopedArrowKeyTraversal {
 public:
  explicit ScopedArrowKeyTraversal(bool new_arrow_key_tranversal_enabled)
      : previous_arrow_key_traversal_enabled_(
            views::FocusManager::arrow_key_traversal_enabled()) {
    views::FocusManager::set_arrow_key_traversal_enabled(
        new_arrow_key_tranversal_enabled);
  }
  ~ScopedArrowKeyTraversal() {
    views::FocusManager::set_arrow_key_traversal_enabled(
        previous_arrow_key_traversal_enabled_);
  }

 private:
  const bool previous_arrow_key_traversal_enabled_;
  DISALLOW_COPY_AND_ASSIGN(ScopedArrowKeyTraversal);
};

}  // namespace

namespace chromeos {

// static
const char WebUILoginView::kViewClassName[] =
    "browser/chromeos/login/WebUILoginView";

// WebUILoginView public: ------------------------------------------------------

WebUILoginView::WebUILoginView()
    : webui_login_(NULL),
      is_hidden_(false),
      webui_visible_(false),
      should_emit_login_prompt_visible_(true),
      forward_keyboard_event_(true) {
  registrar_.Add(this,
                 chrome::NOTIFICATION_LOGIN_OR_LOCK_WEBUI_VISIBLE,
                 content::NotificationService::AllSources());
  registrar_.Add(this,
                 chrome::NOTIFICATION_LOGIN_NETWORK_ERROR_SHOWN,
                 content::NotificationService::AllSources());

  accel_map_[ui::Accelerator(ui::VKEY_ESCAPE, ui::EF_NONE)] =
      kAccelNameCancel;
  accel_map_[ui::Accelerator(ui::VKEY_E,
                             ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN)] =
      kAccelNameEnrollment;
  accel_map_[ui::Accelerator(ui::VKEY_K,
                             ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN)] =
      kAccelNameKioskEnable;
  accel_map_[ui::Accelerator(ui::VKEY_V, ui::EF_ALT_DOWN)] =
      kAccelNameVersion;
  accel_map_[ui::Accelerator(ui::VKEY_R,
      ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN | ui::EF_SHIFT_DOWN)] =
      kAccelNameReset;

  accel_map_[ui::Accelerator(ui::VKEY_LEFT, ui::EF_NONE)] =
      kAccelFocusPrev;
  accel_map_[ui::Accelerator(ui::VKEY_RIGHT, ui::EF_NONE)] =
      kAccelFocusNext;

  // Use KEY_RELEASED because Gaia consumes KEY_PRESSED for up/down key.
  ui::Accelerator key_up(ui::VKEY_UP, ui::EF_NONE);
  key_up.set_type(ui::ET_KEY_RELEASED);
  ui::Accelerator key_down(ui::VKEY_DOWN, ui::EF_NONE);
  key_down.set_type(ui::ET_KEY_RELEASED);
  accel_map_[key_up] = kAccelFocusPrev;
  accel_map_[key_down] = kAccelFocusNext;

  accel_map_[ui::Accelerator(
      ui::VKEY_D, ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN | ui::EF_SHIFT_DOWN)] =
      kAccelNameDeviceRequisition;
  accel_map_[
      ui::Accelerator(ui::VKEY_H, ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN)] =
      kAccelNameDeviceRequisitionRemora;

  accel_map_[ui::Accelerator(ui::VKEY_S,
                             ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN)] =
      kAccelNameAppLaunchBailout;

  accel_map_[ui::Accelerator(ui::VKEY_N,
                             ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN)] =
      kAccelNameAppLaunchNetworkConfig;

  for (AccelMap::iterator i(accel_map_.begin()); i != accel_map_.end(); ++i)
    AddAccelerator(i->first);
}

WebUILoginView::~WebUILoginView() {
  FOR_EACH_OBSERVER(web_modal::ModalDialogHostObserver,
                    observer_list_,
                    OnHostDestroying());

  if (ash::Shell::GetInstance()->HasPrimaryStatusArea()) {
    ash::Shell::GetInstance()->GetPrimarySystemTray()->
        SetNextFocusableView(NULL);
  }
}

void WebUILoginView::Init() {
  Profile* signin_profile = ProfileHelper::GetSigninProfile();
  auth_extension_.reset(new ScopedGaiaAuthExtension(signin_profile));
  webui_login_ = new views::WebView(signin_profile);
  webui_login_->set_allow_accelerators(true);
  AddChildView(webui_login_);

  WebContents* web_contents = webui_login_->GetWebContents();

  // Create the password manager that is needed for the proxy.
  ChromePasswordManagerClient::CreateForWebContents(web_contents);

  // LoginHandlerViews uses a constrained window for the password manager view.
  WebContentsModalDialogManager::CreateForWebContents(web_contents);
  WebContentsModalDialogManager::FromWebContents(web_contents)->
      SetDelegate(this);

  web_contents->SetDelegate(this);
  extensions::ChromeExtensionWebContentsObserver::CreateForWebContents(
      web_contents);
  WebContentsObserver::Observe(web_contents);
  renderer_preferences_util::UpdateFromSystemSettings(
      web_contents->GetMutableRendererPrefs(),
      signin_profile);
}

const char* WebUILoginView::GetClassName() const {
  return kViewClassName;
}

web_modal::WebContentsModalDialogHost*
    WebUILoginView::GetWebContentsModalDialogHost() {
  return this;
}

gfx::NativeView WebUILoginView::GetHostView() const {
  return GetWidget()->GetNativeView();
}

gfx::Point WebUILoginView::GetDialogPosition(const gfx::Size& size) {
  // Center the widget.
  gfx::Size widget_size = GetWidget()->GetWindowBoundsInScreen().size();
  return gfx::Point(widget_size.width() / 2 - size.width() / 2,
                    widget_size.height() / 2 - size.height() / 2);
}

gfx::Size WebUILoginView::GetMaximumDialogSize() {
  return GetWidget()->GetWindowBoundsInScreen().size();
}

void WebUILoginView::AddObserver(
    web_modal::ModalDialogHostObserver* observer) {
  if (observer && !observer_list_.HasObserver(observer))
    observer_list_.AddObserver(observer);
}

void WebUILoginView::RemoveObserver(
    web_modal::ModalDialogHostObserver* observer) {
  observer_list_.RemoveObserver(observer);
}

bool WebUILoginView::AcceleratorPressed(
    const ui::Accelerator& accelerator) {
  AccelMap::const_iterator entry = accel_map_.find(accelerator);
  if (entry == accel_map_.end())
    return false;

  if (!webui_login_)
    return true;

  content::WebUI* web_ui = GetWebUI();
  if (web_ui) {
    base::StringValue accel_name(entry->second);
    web_ui->CallJavascriptFunction("cr.ui.Oobe.handleAccelerator",
                                   accel_name);
  }

  return true;
}

gfx::NativeWindow WebUILoginView::GetNativeWindow() const {
  return GetWidget()->GetNativeWindow();
}

void WebUILoginView::LoadURL(const GURL & url) {
  webui_login_->LoadInitialURL(url);
  webui_login_->RequestFocus();

  // TODO(nkostylev): Use WebContentsObserver::RenderViewCreated to track
  // when RenderView is created.
  // Use a background with transparency to trigger transparency in Webkit.
  SkBitmap background;
  background.setConfig(SkBitmap::kARGB_8888_Config, 1, 1);
  background.allocPixels();
  background.eraseARGB(0x00, 0x00, 0x00, 0x00);
  content::RenderViewHost* host = GetWebContents()->GetRenderViewHost();
  host->GetView()->SetBackground(background);
}

content::WebUI* WebUILoginView::GetWebUI() {
  return webui_login_->web_contents()->GetWebUI();
}

content::WebContents* WebUILoginView::GetWebContents() {
  return webui_login_->web_contents();
}

void WebUILoginView::OpenProxySettings() {
  const NetworkState* network =
      NetworkHandler::Get()->network_state_handler()->DefaultNetwork();
  if (!network) {
    LOG(ERROR) << "No default network found!";
    return;
  }
  ProxySettingsDialog* dialog =
      new ProxySettingsDialog(ProfileHelper::GetSigninProfile(),
                              *network, NULL, GetNativeWindow());
  dialog->Show();
}

void WebUILoginView::OnPostponedShow() {
  set_is_hidden(false);
  OnLoginPromptVisible();
}

void WebUILoginView::SetStatusAreaVisible(bool visible) {
  if (ash::Shell::GetInstance()->HasPrimaryStatusArea()) {
    ash::SystemTray* tray = ash::Shell::GetInstance()->GetPrimarySystemTray();
    if (visible) {
      // Tray may have been initialized being hidden.
      tray->SetVisible(visible);
      tray->GetWidget()->Show();
    } else {
      tray->GetWidget()->Hide();
    }
  }
}

void WebUILoginView::SetUIEnabled(bool enabled) {
  forward_keyboard_event_ = enabled;
  ash::Shell::GetInstance()->GetPrimarySystemTray()->SetEnabled(enabled);
}

// WebUILoginView protected: ---------------------------------------------------

void WebUILoginView::Layout() {
  DCHECK(webui_login_);
  webui_login_->SetBoundsRect(bounds());

  FOR_EACH_OBSERVER(web_modal::ModalDialogHostObserver,
                    observer_list_,
                    OnPositionRequiresUpdate());
}

void WebUILoginView::OnLocaleChanged() {
}

void WebUILoginView::ChildPreferredSizeChanged(View* child) {
  Layout();
  SchedulePaint();
}

void WebUILoginView::AboutToRequestFocusFromTabTraversal(bool reverse) {
  // Return the focus to the web contents.
  webui_login_->web_contents()->FocusThroughTabTraversal(reverse);
  GetWidget()->Activate();
  webui_login_->web_contents()->GetView()->Focus();
}

void WebUILoginView::Observe(int type,
                             const content::NotificationSource& source,
                             const content::NotificationDetails& details) {
  switch (type) {
    case chrome::NOTIFICATION_LOGIN_OR_LOCK_WEBUI_VISIBLE:
    case chrome::NOTIFICATION_LOGIN_NETWORK_ERROR_SHOWN: {
      OnLoginPromptVisible();
      registrar_.RemoveAll();
      break;
    }
    default:
      NOTREACHED() << "Unexpected notification " << type;
  }
}

// WebUILoginView private: -----------------------------------------------------

bool WebUILoginView::HandleContextMenu(
    const content::ContextMenuParams& params) {
  // Do not show the context menu.
#ifndef NDEBUG
  return false;
#else
  return true;
#endif
}

void WebUILoginView::HandleKeyboardEvent(content::WebContents* source,
                                         const NativeWebKeyboardEvent& event) {
  if (forward_keyboard_event_) {
    // Disable arrow key traversal because arrow keys are handled via
    // accelerator when this view has focus.
    ScopedArrowKeyTraversal arrow_key_traversal(false);

    unhandled_keyboard_event_handler_.HandleKeyboardEvent(event,
                                                          GetFocusManager());
  }

  // Make sure error bubble is cleared on keyboard event. This is needed
  // when the focus is inside an iframe. Only clear on KeyDown to prevent hiding
  // an immediate authentication error (See crbug.com/103643).
  if (event.type == blink::WebInputEvent::KeyDown) {
    content::WebUI* web_ui = GetWebUI();
    if (web_ui)
      web_ui->CallJavascriptFunction("cr.ui.Oobe.clearErrors");
  }
}

bool WebUILoginView::IsPopupOrPanel(const WebContents* source) const {
  return true;
}

bool WebUILoginView::TakeFocus(content::WebContents* source, bool reverse) {
  // In case of blocked UI (ex.: sign in is in progress)
  // we should not process focus change events.
  if (!forward_keyboard_event_)
    return false;

  ash::SystemTray* tray = ash::Shell::GetInstance()->GetPrimarySystemTray();
  if (tray && tray->GetWidget()->IsVisible()) {
    tray->SetNextFocusableView(this);
    ash::Shell::GetInstance()->RotateFocus(reverse ? ash::Shell::BACKWARD :
                                                     ash::Shell::FORWARD);
  }

  return true;
}

void WebUILoginView::RequestMediaAccessPermission(
    WebContents* web_contents,
    const content::MediaStreamRequest& request,
    const content::MediaResponseCallback& callback) {
  if (MediaStreamInfoBarDelegate::Create(web_contents, request, callback))
    NOTREACHED() << "Media stream not allowed for WebUI";
}

bool WebUILoginView::PreHandleGestureEvent(
    content::WebContents* source,
    const blink::WebGestureEvent& event) {
  // Disable pinch zooming.
  return event.type == blink::WebGestureEvent::GesturePinchBegin ||
      event.type == blink::WebGestureEvent::GesturePinchUpdate ||
      event.type == blink::WebGestureEvent::GesturePinchEnd;
}

void WebUILoginView::DidFailProvisionalLoad(
    int64 frame_id,
    const base::string16& frame_unique_name,
    bool is_main_frame,
    const GURL& validated_url,
    int error_code,
    const base::string16& error_description,
    content::RenderViewHost* render_view_host) {
  if (frame_unique_name != base::UTF8ToUTF16("gaia-frame"))
    return;

  GetWebUI()->CallJavascriptFunction("login.GaiaSigninScreen.onFrameError",
                                     base::FundamentalValue(-error_code),
                                     base::StringValue(validated_url.spec()));
}

void WebUILoginView::OnLoginPromptVisible() {
  // If we're hidden than will generate this signal once we're shown.
  if (is_hidden_ || webui_visible_) {
    LOG(WARNING) << "Login WebUI >> not emitting signal, hidden: "
                 << is_hidden_;
    return;
  }
  TRACE_EVENT0("chromeos", "WebUILoginView::OnLoginPromoptVisible");
  if (should_emit_login_prompt_visible_) {
    LOG(WARNING) << "Login WebUI >> login-prompt-visible";
    chromeos::DBusThreadManager::Get()->GetSessionManagerClient()->
        EmitLoginPromptVisible();
  }

  webui_visible_ = true;
}

void WebUILoginView::ReturnFocus(bool reverse) {
  // Return the focus to the web contents.
  webui_login_->web_contents()->FocusThroughTabTraversal(reverse);
  GetWidget()->Activate();
}

}  // namespace chromeos
/* [<][>][^][v][top][bottom][index][help] */
root/chrome/browser/chromeos/login/webui_login_view.cc

DEFINITIONS
