chrome/browser/ui/views/toolbar/toolbar

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This source file includes following definitions.
GetButtonSpacing
IsStreamlinedHostedAppsEnabled
HasAshShell
extension_message_bubble_factory_
Init
OnWidgetVisibilityChanged
Update
SetPaneFocusAndFocusAppMenu
IsAppMenuFocused
AddMenuListener
RemoveMenuListener
GetBookmarkBubbleAnchor
GetTranslateBubbleAnchor
ExecuteExtensionCommand
ShowPageActionPopup
ShowBrowserActionPopup
app_menu
SetPaneFocus
GetAccessibleState
GetAcceleratorInfo
OnMenuButtonClicked
GetWebContents
GetToolbarModel
GetToolbarModel
GetInstant
GetContentSettingBubbleModelDelegate
ShowWebsiteSettings
CreateViewsBubble
CreatePageActionImageView
EnabledStateChangedForCommand
ButtonPressed
Observe
GetAcceleratorForCommandId
GetPreferredSize
Layout
HitTestRect
OnPaint
OnThemeChanged
GetClassName
AcceleratorPressed
IsWrenchMenuShowing
ShouldPaintBackground
SetPaneFocusAndFocusDefault
RemovePaneFocus
ShouldShowUpgradeRecommended
ShouldShowIncompatibilityWarning
PopupTopSpacing
LoadImages
ShowCriticalNotification
ShowOutdatedInstallNotification
UpdateAppMenuState
UpdateWrenchButtonSeverity
OnShowHomeButtonChanged
content_shadow_height
// 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/ui/views/toolbar/toolbar_view.h"

#include "base/command_line.h"
#include "base/debug/trace_event.h"
#include "base/i18n/number_formatting.h"
#include "base/prefs/pref_service.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/app/chrome_command_ids.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/command_updater.h"
#include "chrome/browser/extensions/extension_action.h"
#include "chrome/browser/extensions/extension_action_manager.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/search/search.h"
#include "chrome/browser/themes/theme_service.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_command_controller.h"
#include "chrome/browser/ui/browser_commands.h"
#include "chrome/browser/ui/browser_content_setting_bubble_model_delegate.h"
#include "chrome/browser/ui/browser_instant_controller.h"
#include "chrome/browser/ui/browser_tabstrip.h"
#include "chrome/browser/ui/browser_window.h"
#include "chrome/browser/ui/global_error/global_error_service.h"
#include "chrome/browser/ui/global_error/global_error_service_factory.h"
#include "chrome/browser/ui/omnibox/omnibox_view.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/browser/ui/toolbar/wrench_menu_model.h"
#include "chrome/browser/ui/view_ids.h"
#include "chrome/browser/ui/views/extensions/extension_message_bubble_view.h"
#include "chrome/browser/ui/views/extensions/extension_popup.h"
#include "chrome/browser/ui/views/frame/browser_view.h"
#include "chrome/browser/ui/views/location_bar/page_action_image_view.h"
#include "chrome/browser/ui/views/location_bar/page_action_with_badge_view.h"
#include "chrome/browser/ui/views/location_bar/star_view.h"
#include "chrome/browser/ui/views/location_bar/translate_icon_view.h"
#include "chrome/browser/ui/views/outdated_upgrade_bubble_view.h"
#include "chrome/browser/ui/views/toolbar/back_button.h"
#include "chrome/browser/ui/views/toolbar/browser_actions_container.h"
#include "chrome/browser/ui/views/toolbar/home_button.h"
#include "chrome/browser/ui/views/toolbar/reload_button.h"
#include "chrome/browser/ui/views/toolbar/toolbar_button.h"
#include "chrome/browser/ui/views/toolbar/toolbar_origin_chip_view.h"
#include "chrome/browser/ui/views/toolbar/wrench_menu.h"
#include "chrome/browser/ui/views/toolbar/wrench_toolbar_button.h"
#include "chrome/browser/upgrade_detector.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/pref_names.h"
#include "content/public/browser/browser_accessibility_state.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/user_metrics.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_view.h"
#include "grit/chromium_strings.h"
#include "grit/generated_resources.h"
#include "grit/theme_resources.h"
#include "ui/accessibility/ax_view_state.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/layout.h"
#include "ui/base/theme_provider.h"
#include "ui/base/window_open_disposition.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/image/canvas_image_source.h"
#include "ui/views/controls/menu/menu_listener.h"
#include "ui/views/focus/view_storage.h"
#include "ui/views/widget/tooltip_manager.h"
#include "ui/views/widget/widget.h"
#include "ui/views/window/non_client_view.h"

#if defined(OS_WIN)
#include "base/win/windows_version.h"
#include "chrome/browser/enumerate_modules_model_win.h"
#include "chrome/browser/ui/views/conflicting_module_view_win.h"
#include "chrome/browser/ui/views/critical_notification_bubble_view.h"
#endif

#if defined(USE_AURA)
#include "ui/aura/window.h"
#include "ui/compositor/layer.h"
#include "ui/native_theme/native_theme_aura.h"
#endif

#if !defined(OS_CHROMEOS)
#include "chrome/browser/signin/signin_global_error_factory.h"
#include "chrome/browser/sync/sync_global_error_factory.h"
#endif

#if defined(USE_ASH)
#include "ash/shell.h"
#endif

using base::UserMetricsAction;
using content::WebContents;

namespace {

// The edge graphics have some built-in spacing/shadowing, so we have to adjust
// our spacing to make it match.
const int kLeftEdgeSpacing = 3;
const int kRightEdgeSpacing = 2;

// Ash doesn't use a rounded content area and its top edge has an extra shadow.
const int kContentShadowHeightAsh = 2;

// Non-ash uses a rounded content area with no shadow in the assets.
const int kContentShadowHeight = 0;

int GetButtonSpacing() {
  return (ui::GetDisplayLayout() == ui::LAYOUT_TOUCH) ?
      ToolbarView::kStandardSpacing : 0;
}

bool IsStreamlinedHostedAppsEnabled() {
  return CommandLine::ForCurrentProcess()->HasSwitch(
      switches::kEnableStreamlinedHostedApps);
}

#if !defined(OS_CHROMEOS)
bool HasAshShell() {
#if defined(USE_ASH)
  return ash::Shell::HasInstance();
#else
  return false;
#endif  // USE_ASH
}
#endif  // OS_CHROMEOS

}  // namespace

// static
const char ToolbarView::kViewClassName[] = "ToolbarView";

////////////////////////////////////////////////////////////////////////////////
// ToolbarView, public:

ToolbarView::ToolbarView(Browser* browser)
    : back_(NULL),
      forward_(NULL),
      reload_(NULL),
      home_(NULL),
      location_bar_(NULL),
      origin_chip_view_(NULL),
      browser_actions_(NULL),
      app_menu_(NULL),
      browser_(browser),
      extension_message_bubble_factory_(
          new extensions::ExtensionMessageBubbleFactory(browser->profile(),
                                                        this)) {
  set_id(VIEW_ID_TOOLBAR);

  chrome::AddCommandObserver(browser_, IDC_BACK, this);
  chrome::AddCommandObserver(browser_, IDC_FORWARD, this);
  chrome::AddCommandObserver(browser_, IDC_RELOAD, this);
  chrome::AddCommandObserver(browser_, IDC_HOME, this);
  chrome::AddCommandObserver(browser_, IDC_LOAD_NEW_TAB_PAGE, this);

  display_mode_ = DISPLAYMODE_LOCATION;
  if (browser->SupportsWindowFeature(Browser::FEATURE_TABSTRIP) ||
      (browser->is_app() && IsStreamlinedHostedAppsEnabled()))
    display_mode_ = DISPLAYMODE_NORMAL;

  registrar_.Add(this, chrome::NOTIFICATION_UPGRADE_RECOMMENDED,
                 content::NotificationService::AllSources());
  if (OutdatedUpgradeBubbleView::IsAvailable()) {
    registrar_.Add(this, chrome::NOTIFICATION_OUTDATED_INSTALL,
                   content::NotificationService::AllSources());
    registrar_.Add(this, chrome::NOTIFICATION_OUTDATED_INSTALL_NO_AU,
                   content::NotificationService::AllSources());
  }
#if defined(OS_WIN)
  registrar_.Add(this, chrome::NOTIFICATION_CRITICAL_UPGRADE_INSTALLED,
                 content::NotificationService::AllSources());
  if (base::win::GetVersion() == base::win::VERSION_XP) {
    registrar_.Add(this, chrome::NOTIFICATION_MODULE_LIST_ENUMERATED,
                   content::NotificationService::AllSources());
  }
#endif
  registrar_.Add(this,
                 chrome::NOTIFICATION_MODULE_INCOMPATIBILITY_BADGE_CHANGE,
                 content::NotificationService::AllSources());
  registrar_.Add(this, chrome::NOTIFICATION_GLOBAL_ERRORS_CHANGED,
                 content::Source<Profile>(browser_->profile()));
}

ToolbarView::~ToolbarView() {
  // NOTE: Don't remove the command observers here.  This object gets destroyed
  // after the Browser (which owns the CommandUpdater), so the CommandUpdater is
  // already gone.
}

void ToolbarView::Init() {
  GetWidget()->AddObserver(this);

  back_ = new BackButton(this, new BackForwardMenuModel(
      browser_, BackForwardMenuModel::BACKWARD_MENU));
  back_->set_triggerable_event_flags(
      ui::EF_LEFT_MOUSE_BUTTON | ui::EF_MIDDLE_MOUSE_BUTTON);
  back_->set_tag(IDC_BACK);
  back_->SetTooltipText(l10n_util::GetStringUTF16(IDS_TOOLTIP_BACK));
  back_->SetAccessibleName(l10n_util::GetStringUTF16(IDS_ACCNAME_BACK));
  back_->set_id(VIEW_ID_BACK_BUTTON);
  back_->Init();

  forward_ = new ToolbarButton(this, new BackForwardMenuModel(
      browser_, BackForwardMenuModel::FORWARD_MENU));
  forward_->set_triggerable_event_flags(
      ui::EF_LEFT_MOUSE_BUTTON | ui::EF_MIDDLE_MOUSE_BUTTON);
  forward_->set_tag(IDC_FORWARD);
  forward_->SetTooltipText(l10n_util::GetStringUTF16(IDS_TOOLTIP_FORWARD));
  forward_->SetAccessibleName(l10n_util::GetStringUTF16(IDS_ACCNAME_FORWARD));
  forward_->set_id(VIEW_ID_FORWARD_BUTTON);
  forward_->Init();

  // Have to create this before |reload_| as |reload_|'s constructor needs it.
  location_bar_ = new LocationBarView(
      browser_, browser_->profile(),
      browser_->command_controller()->command_updater(), this,
      display_mode_ == DISPLAYMODE_LOCATION);

  reload_ = new ReloadButton(location_bar_,
                             browser_->command_controller()->command_updater());
  reload_->set_triggerable_event_flags(
      ui::EF_LEFT_MOUSE_BUTTON | ui::EF_MIDDLE_MOUSE_BUTTON);
  reload_->set_tag(IDC_RELOAD);
  reload_->SetAccessibleName(l10n_util::GetStringUTF16(IDS_ACCNAME_RELOAD));
  reload_->set_id(VIEW_ID_RELOAD_BUTTON);
  reload_->Init();

  home_ = new HomeButton(this, browser_);
  home_->set_triggerable_event_flags(
      ui::EF_LEFT_MOUSE_BUTTON | ui::EF_MIDDLE_MOUSE_BUTTON);
  home_->set_tag(IDC_HOME);
  home_->SetTooltipText(l10n_util::GetStringUTF16(IDS_TOOLTIP_HOME));
  home_->SetAccessibleName(l10n_util::GetStringUTF16(IDS_ACCNAME_HOME));
  home_->set_id(VIEW_ID_HOME_BUTTON);
  home_->Init();

  browser_actions_ = new BrowserActionsContainer(browser_, this);

  app_menu_ = new WrenchToolbarButton(this);
  app_menu_->SetBorder(views::Border::NullBorder());
  app_menu_->EnableCanvasFlippingForRTLUI(true);
  app_menu_->SetAccessibleName(l10n_util::GetStringUTF16(IDS_ACCNAME_APP));
  app_menu_->SetTooltipText(l10n_util::GetStringUTF16(IDS_APPMENU_TOOLTIP));
  app_menu_->set_id(VIEW_ID_APP_MENU);

  // Always add children in order from left to right, for accessibility.
  origin_chip_view_ = new ToolbarOriginChipView(this);
  chrome::OriginChipPosition origin_chip_position =
      chrome::GetOriginChipPosition();
  AddChildView(back_);
  AddChildView(forward_);
  AddChildView(reload_);
  AddChildView(home_);
  if (origin_chip_position == chrome::ORIGIN_CHIP_LEADING_LOCATION_BAR)
    AddChildView(origin_chip_view_);
  AddChildView(location_bar_);
  if (origin_chip_position == chrome::ORIGIN_CHIP_TRAILING_LOCATION_BAR)
    AddChildView(origin_chip_view_);
  AddChildView(browser_actions_);
  if (origin_chip_position == chrome::ORIGIN_CHIP_LEADING_MENU_BUTTON ||
      origin_chip_position == chrome::ORIGIN_CHIP_DISABLED)
    AddChildView(origin_chip_view_);
  AddChildView(app_menu_);

  LoadImages();

  // Start global error services now so we badge the menu correctly in non-Ash.
#if !defined(OS_CHROMEOS)
  if (!HasAshShell()) {
    SigninGlobalErrorFactory::GetForProfile(browser_->profile());
#if !defined(OS_ANDROID)
    SyncGlobalErrorFactory::GetForProfile(browser_->profile());
#endif
  }
#endif  // OS_CHROMEOS

  // Add any necessary badges to the menu item based on the system state.
  // Do this after |app_menu_| has been added as a bubble may be shown that
  // needs the widget (widget found by way of app_menu_->GetWidget()).
  UpdateAppMenuState();

  location_bar_->Init();

  origin_chip_view_->Init();
  if (origin_chip_view_->ShouldShow())
    location_bar_->set_toolbar_origin_chip_view(origin_chip_view_);

  show_home_button_.Init(prefs::kShowHomeButton,
                         browser_->profile()->GetPrefs(),
                         base::Bind(&ToolbarView::OnShowHomeButtonChanged,
                                    base::Unretained(this)));

  browser_actions_->Init();

  // Accessibility specific tooltip text.
  if (content::BrowserAccessibilityState::GetInstance()->
          IsAccessibleBrowser()) {
    back_->SetTooltipText(
        l10n_util::GetStringUTF16(IDS_ACCNAME_TOOLTIP_BACK));
    forward_->SetTooltipText(
        l10n_util::GetStringUTF16(IDS_ACCNAME_TOOLTIP_FORWARD));
  }
}

void ToolbarView::OnWidgetVisibilityChanged(views::Widget* widget,
                                            bool visible) {
  // Safe to call multiple times; the bubble will only appear once.
  if (visible)
    extension_message_bubble_factory_->MaybeShow(app_menu_);
}

void ToolbarView::Update(WebContents* tab) {
  if (location_bar_)
    location_bar_->Update(tab);
  if (origin_chip_view_->visible())
    origin_chip_view_->Update(tab);

  if (browser_actions_)
    browser_actions_->RefreshBrowserActionViews();

  if (reload_)
    reload_->set_menu_enabled(chrome::IsDebuggerAttachedToCurrentTab(browser_));
}

void ToolbarView::SetPaneFocusAndFocusAppMenu() {
  SetPaneFocus(app_menu_);
}

bool ToolbarView::IsAppMenuFocused() {
  return app_menu_->HasFocus();
}

void ToolbarView::AddMenuListener(views::MenuListener* listener) {
  menu_listeners_.AddObserver(listener);
}

void ToolbarView::RemoveMenuListener(views::MenuListener* listener) {
  menu_listeners_.RemoveObserver(listener);
}

views::View* ToolbarView::GetBookmarkBubbleAnchor() {
  views::View* star_view = location_bar()->star_view();
  return (star_view && star_view->visible()) ? star_view : app_menu_;
}

views::View* ToolbarView::GetTranslateBubbleAnchor() {
  views::View* translate_icon_view = location_bar()->translate_icon_view();
  return (translate_icon_view && translate_icon_view->visible()) ?
      translate_icon_view : app_menu_;
}

void ToolbarView::ExecuteExtensionCommand(
    const extensions::Extension* extension,
    const extensions::Command& command) {
  browser_actions_->ExecuteExtensionCommand(extension, command);
}

void ToolbarView::ShowPageActionPopup(const extensions::Extension* extension) {
  extensions::ExtensionActionManager* extension_manager =
      extensions::ExtensionActionManager::Get(browser_->profile());
  ExtensionAction* extension_action =
      extension_manager->GetPageAction(*extension);
  if (extension_action) {
    location_bar_->GetPageActionView(extension_action)->image_view()->
        ExecuteAction(ExtensionPopup::SHOW);
  }
}

void ToolbarView::ShowBrowserActionPopup(
    const extensions::Extension* extension) {
  browser_actions_->ShowPopup(extension, true);
}

views::MenuButton* ToolbarView::app_menu() const {
  return app_menu_;
}

////////////////////////////////////////////////////////////////////////////////
// ToolbarView, AccessiblePaneView overrides:

bool ToolbarView::SetPaneFocus(views::View* initial_focus) {
  if (!AccessiblePaneView::SetPaneFocus(initial_focus))
    return false;

  location_bar_->SetShowFocusRect(true);
  return true;
}

void ToolbarView::GetAccessibleState(ui::AXViewState* state) {
  state->role = ui::AX_ROLE_TOOLBAR;
  state->name = l10n_util::GetStringUTF16(IDS_ACCNAME_TOOLBAR);
}

////////////////////////////////////////////////////////////////////////////////
// ToolbarView, Menu::Delegate overrides:

bool ToolbarView::GetAcceleratorInfo(int id, ui::Accelerator* accel) {
  return GetWidget()->GetAccelerator(id, accel);
}

////////////////////////////////////////////////////////////////////////////////
// ToolbarView, views::MenuButtonListener implementation:

void ToolbarView::OnMenuButtonClicked(views::View* source,
                                      const gfx::Point& point) {
  TRACE_EVENT0("views", "ToolbarView::OnMenuButtonClicked");
  DCHECK_EQ(VIEW_ID_APP_MENU, source->id());

  bool use_new_menu = false;
  bool supports_new_separators = false;
  // TODO: remove this.
#if defined(USE_AURA)
  supports_new_separators =
      GetNativeTheme() == ui::NativeThemeAura::instance();
  use_new_menu = supports_new_separators;
#endif
#if defined(OS_WIN)
  use_new_menu = use_new_menu || ui::GetDisplayLayout() == ui::LAYOUT_TOUCH;
#endif

  wrench_menu_.reset(new WrenchMenu(browser_, use_new_menu,
                                    supports_new_separators));
  wrench_menu_model_.reset(new WrenchMenuModel(this, browser_, use_new_menu));
  wrench_menu_->Init(wrench_menu_model_.get());

  FOR_EACH_OBSERVER(views::MenuListener, menu_listeners_, OnMenuOpened());

  wrench_menu_->RunMenu(app_menu_);
}

////////////////////////////////////////////////////////////////////////////////
// ToolbarView, LocationBarView::Delegate implementation:

WebContents* ToolbarView::GetWebContents() {
  return browser_->tab_strip_model()->GetActiveWebContents();
}

ToolbarModel* ToolbarView::GetToolbarModel() {
  return browser_->toolbar_model();
}

const ToolbarModel* ToolbarView::GetToolbarModel() const {
  return browser_->toolbar_model();
}

InstantController* ToolbarView::GetInstant() {
  return browser_->instant_controller() ?
      browser_->instant_controller()->instant() : NULL;
}

ContentSettingBubbleModelDelegate*
ToolbarView::GetContentSettingBubbleModelDelegate() {
  return browser_->content_setting_bubble_model_delegate();
}

void ToolbarView::ShowWebsiteSettings(content::WebContents* web_contents,
                                      const GURL& url,
                                      const content::SSLStatus& ssl) {
  chrome::ShowWebsiteSettings(browser_, web_contents, url, ssl);
}

views::Widget* ToolbarView::CreateViewsBubble(
    views::BubbleDelegateView* bubble_delegate) {
  return views::BubbleDelegateView::CreateBubble(bubble_delegate);
}

PageActionImageView* ToolbarView::CreatePageActionImageView(
    LocationBarView* owner, ExtensionAction* action) {
  return new PageActionImageView(owner, action, browser_);
}

////////////////////////////////////////////////////////////////////////////////
// ToolbarView, CommandObserver implementation:

void ToolbarView::EnabledStateChangedForCommand(int id, bool enabled) {
  views::Button* button = NULL;
  switch (id) {
    case IDC_BACK:
      button = back_;
      break;
    case IDC_FORWARD:
      button = forward_;
      break;
    case IDC_RELOAD:
      button = reload_;
      break;
    case IDC_HOME:
      button = home_;
      break;
  }
  if (button)
    button->SetEnabled(enabled);
}

////////////////////////////////////////////////////////////////////////////////
// ToolbarView, views::Button::ButtonListener implementation:

void ToolbarView::ButtonPressed(views::Button* sender,
                                const ui::Event& event) {
  chrome::ExecuteCommandWithDisposition(
      browser_, sender->tag(), ui::DispositionFromEventFlags(event.flags()));
}

////////////////////////////////////////////////////////////////////////////////
// ToolbarView, content::NotificationObserver implementation:

void ToolbarView::Observe(int type,
                          const content::NotificationSource& source,
                          const content::NotificationDetails& details) {
  switch (type) {
    case chrome::NOTIFICATION_UPGRADE_RECOMMENDED:
    case chrome::NOTIFICATION_MODULE_INCOMPATIBILITY_BADGE_CHANGE:
    case chrome::NOTIFICATION_GLOBAL_ERRORS_CHANGED:
    case chrome::NOTIFICATION_MODULE_LIST_ENUMERATED:
      UpdateAppMenuState();
      break;
    case chrome::NOTIFICATION_OUTDATED_INSTALL:
      ShowOutdatedInstallNotification(true);
      break;
    case chrome::NOTIFICATION_OUTDATED_INSTALL_NO_AU:
      ShowOutdatedInstallNotification(false);
      break;
#if defined(OS_WIN)
    case chrome::NOTIFICATION_CRITICAL_UPGRADE_INSTALLED:
      ShowCriticalNotification();
      break;
#endif
    default:
      NOTREACHED();
  }
}

////////////////////////////////////////////////////////////////////////////////
// ToolbarView, ui::AcceleratorProvider implementation:

bool ToolbarView::GetAcceleratorForCommandId(int command_id,
    ui::Accelerator* accelerator) {
  return GetWidget()->GetAccelerator(command_id, accelerator);
}

////////////////////////////////////////////////////////////////////////////////
// ToolbarView, views::View overrides:

gfx::Size ToolbarView::GetPreferredSize() {
  gfx::Size size(location_bar_->GetPreferredSize());
  if (is_display_mode_normal()) {
    int button_spacing = GetButtonSpacing();
    size.Enlarge(
        kLeftEdgeSpacing + back_->GetPreferredSize().width() + button_spacing +
            forward_->GetPreferredSize().width() + button_spacing +
            reload_->GetPreferredSize().width() + kStandardSpacing +
            (show_home_button_.GetValue() ?
                (home_->GetPreferredSize().width() + button_spacing) : 0) +
            (origin_chip_view_->visible() ?
                (origin_chip_view_->GetPreferredSize().width() +
                    2 * kStandardSpacing) :
                0) +
            browser_actions_->GetPreferredSize().width() +
            app_menu_->GetPreferredSize().width() + kRightEdgeSpacing,
        0);
    gfx::ImageSkia* normal_background =
        GetThemeProvider()->GetImageSkiaNamed(IDR_CONTENT_TOP_CENTER);
    size.SetToMax(
        gfx::Size(0, normal_background->height() - content_shadow_height()));
  } else {
    const int kPopupBottomSpacingGlass = 1;
    const int kPopupBottomSpacingNonGlass = 2;
    size.Enlarge(
        0,
        PopupTopSpacing() + (GetWidget()->ShouldWindowContentsBeTransparent() ?
            kPopupBottomSpacingGlass : kPopupBottomSpacingNonGlass));
  }
  return size;
}

void ToolbarView::Layout() {
  // If we have not been initialized yet just do nothing.
  if (back_ == NULL)
    return;

  if (!is_display_mode_normal()) {
    location_bar_->SetBounds(0, PopupTopSpacing(), width(),
                             location_bar_->GetPreferredSize().height());
    return;
  }

  // We assume all child elements except the location bar are the same height.
  // Set child_y such that buttons appear vertically centered. We put any excess
  // padding above the buttons.
  int child_height =
      std::min(back_->GetPreferredSize().height(), height());
  int child_y = (height() - child_height + 1) / 2;

  // If the window is maximized, we extend the back button to the left so that
  // clicking on the left-most pixel will activate the back button.
  // TODO(abarth):  If the window becomes maximized but is not resized,
  //                then Layout() might not be called and the back button
  //                will be slightly the wrong size.  We should force a
  //                Layout() in this case.
  //                http://crbug.com/5540
  bool maximized = browser_->window() && browser_->window()->IsMaximized();
  int back_width = back_->GetPreferredSize().width();
  if (maximized) {
    back_->SetBounds(0, child_y, back_width + kLeftEdgeSpacing, child_height);
    back_->SetLeadingMargin(kLeftEdgeSpacing);
  } else {
    back_->SetBounds(kLeftEdgeSpacing, child_y, back_width, child_height);
    back_->SetLeadingMargin(0);
  }
  int button_spacing = GetButtonSpacing();
  int next_element_x = back_->bounds().right() + button_spacing;

  forward_->SetBounds(next_element_x, child_y,
                      forward_->GetPreferredSize().width(), child_height);
  next_element_x = forward_->bounds().right() + button_spacing;

  reload_->SetBounds(next_element_x, child_y,
                     reload_->GetPreferredSize().width(), child_height);
  next_element_x = reload_->bounds().right();

  if (show_home_button_.GetValue() ||
      (browser_->is_app() && IsStreamlinedHostedAppsEnabled())) {
    home_->SetVisible(true);
    home_->SetBounds(next_element_x + button_spacing, child_y,
                     home_->GetPreferredSize().width(), child_height);
  } else {
    home_->SetVisible(false);
    home_->SetBounds(next_element_x, child_y, 0, child_height);
  }
  next_element_x = home_->bounds().right() + kStandardSpacing;

  int browser_actions_width = browser_actions_->GetPreferredSize().width();
  int app_menu_width = app_menu_->GetPreferredSize().width();
  int available_width = std::max(0, width() - kRightEdgeSpacing -
      app_menu_width - browser_actions_width - next_element_x);

  origin_chip_view_->SetVisible(origin_chip_view_->ShouldShow());
  int origin_chip_width =
      origin_chip_view_->ElideDomainTarget(available_width / 2);
  if (origin_chip_view_->visible())
    available_width -= origin_chip_width + kStandardSpacing;

  chrome::OriginChipPosition origin_chip_position =
      chrome::GetOriginChipPosition();
  if (origin_chip_view_->visible() &&
      origin_chip_position == chrome::ORIGIN_CHIP_LEADING_LOCATION_BAR) {
    origin_chip_view_->SetBounds(next_element_x, child_y,
                                 origin_chip_width, child_height);
    next_element_x = origin_chip_view_->bounds().right() + kStandardSpacing;
  }

  int location_height = location_bar_->GetPreferredSize().height();
  int location_y = (height() - location_height + 1) / 2;
  location_bar_->SetBounds(next_element_x, location_y,
                           std::max(available_width, 0), location_height);
  next_element_x = location_bar_->bounds().right();

  if (origin_chip_view_->visible() &&
      origin_chip_position == chrome::ORIGIN_CHIP_TRAILING_LOCATION_BAR) {
    origin_chip_view_->SetBounds(next_element_x + kStandardSpacing, child_y,
                                 origin_chip_width, child_height);
    next_element_x = origin_chip_view_->bounds().right();
  }

  browser_actions_->SetBounds(
      next_element_x, child_y, browser_actions_width, child_height);
  next_element_x = browser_actions_->bounds().right();

  // The browser actions need to do a layout explicitly, because when an
  // extension is loaded/unloaded/changed, BrowserActionContainer removes and
  // re-adds everything, regardless of whether it has a page action. For a
  // page action, browser action bounds do not change, as a result of which
  // SetBounds does not do a layout at all.
  // TODO(sidchat): Rework the above behavior so that explicit layout is not
  //                required.
  browser_actions_->Layout();

  if (origin_chip_view_->visible() &&
      origin_chip_position == chrome::ORIGIN_CHIP_LEADING_MENU_BUTTON) {
    origin_chip_view_->SetBounds(next_element_x, child_y,
                                 origin_chip_width, child_height);
    next_element_x = origin_chip_view_->bounds().right() + kStandardSpacing;
  }

  // Extend the app menu to the screen's right edge in maximized mode just like
  // we extend the back button to the left edge.
  if (maximized)
    app_menu_width += kRightEdgeSpacing;
  app_menu_->SetBounds(next_element_x, child_y, app_menu_width, child_height);
}

bool ToolbarView::HitTestRect(const gfx::Rect& rect) const {
  // Fall through to the tab strip above us if none of |rect| intersects
  // with this view (intersection with the top shadow edge does not
  // count as intersection with this view).
  if (rect.bottom() < content_shadow_height())
    return false;
  // Otherwise let our superclass take care of it.
  return AccessiblePaneView::HitTestRect(rect);
}

void ToolbarView::OnPaint(gfx::Canvas* canvas) {
  View::OnPaint(canvas);

  if (is_display_mode_normal())
    return;

  // For glass, we need to draw a black line below the location bar to separate
  // it from the content area.  For non-glass, the NonClientView draws the
  // toolbar background below the location bar for us.
  // NOTE: Keep this in sync with BrowserView::GetInfoBarSeparatorColor()!
  if (GetWidget()->ShouldWindowContentsBeTransparent())
    canvas->FillRect(gfx::Rect(0, height() - 1, width(), 1), SK_ColorBLACK);
}

void ToolbarView::OnThemeChanged() {
  LoadImages();
}

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

bool ToolbarView::AcceleratorPressed(const ui::Accelerator& accelerator) {
  const views::View* focused_view = focus_manager()->GetFocusedView();
  if (focused_view && (focused_view->id() == VIEW_ID_OMNIBOX))
    return false;  // Let the omnibox handle all accelerator events.
  return AccessiblePaneView::AcceleratorPressed(accelerator);
}

bool ToolbarView::IsWrenchMenuShowing() const {
  return wrench_menu_.get() && wrench_menu_->IsShowing();
}

bool ToolbarView::ShouldPaintBackground() const {
  return display_mode_ == DISPLAYMODE_NORMAL;
}

////////////////////////////////////////////////////////////////////////////////
// ToolbarView, protected:

// Override this so that when the user presses F6 to rotate toolbar panes,
// the location bar gets focus, not the first control in the toolbar - and
// also so that it selects all content in the location bar.
bool ToolbarView::SetPaneFocusAndFocusDefault() {
  if (!location_bar_->HasFocus()) {
    SetPaneFocus(location_bar_);
    location_bar_->FocusLocation(true);
    return true;
  }

  if (!AccessiblePaneView::SetPaneFocusAndFocusDefault())
    return false;
  browser_->window()->RotatePaneFocus(true);
  return true;
}

void ToolbarView::RemovePaneFocus() {
  AccessiblePaneView::RemovePaneFocus();
  location_bar_->SetShowFocusRect(false);
}

////////////////////////////////////////////////////////////////////////////////
// ToolbarView, private:

bool ToolbarView::ShouldShowUpgradeRecommended() {
#if defined(OS_CHROMEOS)
  // In chromeos, the update recommendation is shown in the system tray. So it
  // should not be displayed in the wrench menu.
  return false;
#else
  return (UpgradeDetector::GetInstance()->notify_upgrade());
#endif
}

bool ToolbarView::ShouldShowIncompatibilityWarning() {
#if defined(OS_WIN)
  EnumerateModulesModel* loaded_modules = EnumerateModulesModel::GetInstance();
  loaded_modules->MaybePostScanningTask();
  return loaded_modules->ShouldShowConflictWarning();
#else
  return false;
#endif
}

int ToolbarView::PopupTopSpacing() const {
  const int kPopupTopSpacingNonGlass = 3;
  return GetWidget()->ShouldWindowContentsBeTransparent()
             ? 0
             : kPopupTopSpacingNonGlass;
}

void ToolbarView::LoadImages() {
  ui::ThemeProvider* tp = GetThemeProvider();

  back_->SetImage(views::Button::STATE_NORMAL,
                  *(tp->GetImageSkiaNamed(IDR_BACK)));
  back_->SetImage(views::Button::STATE_DISABLED,
                  *(tp->GetImageSkiaNamed(IDR_BACK_D)));

  forward_->SetImage(views::Button::STATE_NORMAL,
                    *(tp->GetImageSkiaNamed(IDR_FORWARD)));
  forward_->SetImage(views::Button::STATE_DISABLED,
                     *(tp->GetImageSkiaNamed(IDR_FORWARD_D)));

  reload_->LoadImages();

  home_->SetImage(views::Button::STATE_NORMAL,
                  *(tp->GetImageSkiaNamed(IDR_HOME)));
}

void ToolbarView::ShowCriticalNotification() {
#if defined(OS_WIN)
  CriticalNotificationBubbleView* bubble_delegate =
      new CriticalNotificationBubbleView(app_menu_);
  views::BubbleDelegateView::CreateBubble(bubble_delegate)->Show();
#endif
}

void ToolbarView::ShowOutdatedInstallNotification(bool auto_update_enabled) {
  if (OutdatedUpgradeBubbleView::IsAvailable()) {
    OutdatedUpgradeBubbleView::ShowBubble(
        app_menu_, browser_, auto_update_enabled);
  }
}

void ToolbarView::UpdateAppMenuState() {
  base::string16 accname_app = l10n_util::GetStringUTF16(IDS_ACCNAME_APP);
  if (ShouldShowUpgradeRecommended()) {
    accname_app = l10n_util::GetStringFUTF16(
        IDS_ACCNAME_APP_UPGRADE_RECOMMENDED, accname_app);
  }
  app_menu_->SetAccessibleName(accname_app);

  UpdateWrenchButtonSeverity();
  SchedulePaint();
}

void ToolbarView::UpdateWrenchButtonSeverity() {
  // Showing the bubble requires |app_menu_| to be in a widget. See comment
  // in ConflictingModuleView for details.
  DCHECK(app_menu_->GetWidget());

  // Keep track of whether we were showing the badge before, so we don't send
  // multiple UMA events for example when multiple Chrome windows are open.
  static bool incompatibility_badge_showing = false;
  // Save the old value before resetting it.
  bool was_showing = incompatibility_badge_showing;
  incompatibility_badge_showing = false;

  if (ShouldShowUpgradeRecommended()) {
    UpgradeDetector::UpgradeNotificationAnnoyanceLevel level =
        UpgradeDetector::GetInstance()->upgrade_notification_stage();
    app_menu_->SetSeverity(WrenchIconPainter::SeverityFromUpgradeLevel(level),
                           WrenchIconPainter::ShouldAnimateUpgradeLevel(level));
    return;
  }

  if (ShouldShowIncompatibilityWarning()) {
    if (!was_showing) {
      content::RecordAction(UserMetricsAction("ConflictBadge"));
#if defined(OS_WIN)
      ConflictingModuleView::MaybeShow(browser_, app_menu_);
#endif
    }
    app_menu_->SetSeverity(WrenchIconPainter::SEVERITY_MEDIUM, true);
    incompatibility_badge_showing = true;
    return;
  }

  GlobalErrorService* service =
      GlobalErrorServiceFactory::GetForProfile(browser_->profile());
  GlobalError* error =
      service->GetHighestSeverityGlobalErrorWithWrenchMenuItem();
  if (error) {
    app_menu_->SetSeverity(WrenchIconPainter::GlobalErrorSeverity(), true);
    return;
  }

  app_menu_->SetSeverity(WrenchIconPainter::SEVERITY_NONE, true);
}

void ToolbarView::OnShowHomeButtonChanged() {
  Layout();
  SchedulePaint();
}

int ToolbarView::content_shadow_height() const {
  return browser_->host_desktop_type() == chrome::HOST_DESKTOP_TYPE_ASH ?
      kContentShadowHeightAsh : kContentShadowHeight;
}
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root/chrome/browser/ui/views/toolbar/toolbar_view.cc

DEFINITIONS
