path: root/chrome/browser/ui/gtk/browser_window_gtk.cc

// Copyright 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/gtk/browser_window_gtk.h"

#include <gdk/gdkkeysyms.h>

#include <algorithm>
#include <string>

#include "base/base_paths.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/debug/trace_event.h"
#include "base/environment.h"
#include "base/i18n/file_util_icu.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/singleton.h"
#include "base/message_loop.h"
#include "base/nix/xdg_util.h"
#include "base/path_service.h"
#include "base/prefs/pref_service.h"
#include "base/string_util.h"
#include "base/time.h"
#include "base/utf_string_conversions.h"
#include "chrome/app/chrome_command_ids.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/download/download_item_model.h"
#include "chrome/browser/extensions/tab_helper.h"
#include "chrome/browser/infobars/infobar_service.h"
#include "chrome/browser/prefs/scoped_user_pref_update.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/themes/theme_properties.h"
#include "chrome/browser/ui/app_modal_dialogs/app_modal_dialog_queue.h"
#include "chrome/browser/ui/bookmarks/bookmark_tab_helper.h"
#include "chrome/browser/ui/bookmarks/bookmark_utils.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_dialogs.h"
#include "chrome/browser/ui/browser_list.h"
#include "chrome/browser/ui/browser_window_state.h"
#include "chrome/browser/ui/find_bar/find_bar_controller.h"
#include "chrome/browser/ui/find_bar/find_tab_helper.h"
#include "chrome/browser/ui/gtk/accelerators_gtk.h"
#include "chrome/browser/ui/gtk/avatar_menu_bubble_gtk.h"
#include "chrome/browser/ui/gtk/avatar_menu_button_gtk.h"
#include "chrome/browser/ui/gtk/bookmarks/bookmark_bar_gtk.h"
#include "chrome/browser/ui/gtk/browser_titlebar.h"
#include "chrome/browser/ui/gtk/browser_toolbar_gtk.h"
#include "chrome/browser/ui/gtk/create_application_shortcuts_dialog_gtk.h"
#include "chrome/browser/ui/gtk/download/download_in_progress_dialog_gtk.h"
#include "chrome/browser/ui/gtk/download/download_shelf_gtk.h"
#include "chrome/browser/ui/gtk/edit_search_engine_dialog.h"
#include "chrome/browser/ui/gtk/extensions/extension_keybinding_registry_gtk.h"
#include "chrome/browser/ui/gtk/find_bar_gtk.h"
#include "chrome/browser/ui/gtk/fullscreen_exit_bubble_gtk.h"
#include "chrome/browser/ui/gtk/global_menu_bar.h"
#include "chrome/browser/ui/gtk/gtk_theme_service.h"
#include "chrome/browser/ui/gtk/gtk_util.h"
#include "chrome/browser/ui/gtk/gtk_window_util.h"
#include "chrome/browser/ui/gtk/infobars/infobar_container_gtk.h"
#include "chrome/browser/ui/gtk/infobars/infobar_gtk.h"
#include "chrome/browser/ui/gtk/instant_overlay_controller_gtk.h"
#include "chrome/browser/ui/gtk/location_bar_view_gtk.h"
#include "chrome/browser/ui/gtk/nine_box.h"
#include "chrome/browser/ui/gtk/one_click_signin_bubble_gtk.h"
#include "chrome/browser/ui/gtk/password_generation_bubble_gtk.h"
#include "chrome/browser/ui/gtk/reload_button_gtk.h"
#include "chrome/browser/ui/gtk/status_bubble_gtk.h"
#include "chrome/browser/ui/gtk/tab_contents_container_gtk.h"
#include "chrome/browser/ui/gtk/tabs/tab_strip_gtk.h"
#include "chrome/browser/ui/gtk/task_manager_gtk.h"
#include "chrome/browser/ui/gtk/update_recommended_dialog.h"
#include "chrome/browser/ui/gtk/website_settings/website_settings_popup_gtk.h"
#include "chrome/browser/ui/omnibox/location_bar.h"
#include "chrome/browser/ui/omnibox/omnibox_view.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/browser/web_applications/web_app.h"
#include "chrome/common/chrome_notification_types.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/pref_names.h"
#include "components/user_prefs/pref_registry_syncable.h"
#include "content/public/browser/download_manager.h"
#include "content/public/browser/native_web_keyboard_event.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 "grit/chromium_strings.h"
#include "grit/generated_resources.h"
#include "grit/theme_resources.h"
#include "grit/ui_resources.h"
#include "ui/base/accelerators/platform_accelerator_gtk.h"
#include "ui/base/gtk/gtk_floating_container.h"
#include "ui/base/gtk/gtk_hig_constants.h"
#include "ui/base/gtk/gtk_screen_util.h"
#include "ui/base/keycodes/keyboard_codes.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/base/x/active_window_watcher_x.h"
#include "ui/gfx/gtk_util.h"
#include "ui/gfx/image/cairo_cached_surface.h"
#include "ui/gfx/image/image.h"
#include "ui/gfx/rect.h"
#include "ui/gfx/screen.h"
#include "ui/gfx/skia_utils_gtk.h"

using content::NativeWebKeyboardEvent;
using content::SSLStatus;
using content::WebContents;

namespace {

// The number of milliseconds between loading animation frames.
const int kLoadingAnimationFrameTimeMs = 30;

const char* kBrowserWindowKey = "__BROWSER_WINDOW_GTK__";

// While resize areas on Windows are normally the same size as the window
// borders, our top area is shrunk by 1 px to make it easier to move the window
// around with our thinner top grabbable strip.  (Incidentally, our side and
// bottom resize areas don't match the frame border thickness either -- they
// span the whole nonclient area, so there's no "dead zone" for the mouse.)
const int kTopResizeAdjust = 1;
// The thickness of the shadow around the toolbar+web content area.  There are
// actually a couple pixels more that should overlap the toolbar and web
// content area, but we don't use those pixels.
const int kContentShadowThickness = 2;
// The offset to the background when the custom frame is off.  We want the
// window background to line up with the tab background regardless of whether
// we're in custom frame mode or not.  Since themes are designed with the
// custom frame in mind, we need to offset the background when the custom frame
// is off.
const int kCustomFrameBackgroundVerticalOffset = 15;

// The timeout in milliseconds before we'll get the true window position with
// gtk_window_get_position() after the last GTK configure-event signal.
const int kDebounceTimeoutMilliseconds = 100;

// Using gtk_window_get_position/size creates a race condition, so only use
// this to get the initial bounds.  After window creation, we pick up the
// normal bounds by connecting to the configure-event signal.
gfx::Rect GetInitialWindowBounds(GtkWindow* window) {
  gint x, y, width, height;
  gtk_window_get_position(window, &x, &y);
  gtk_window_get_size(window, &width, &height);
  return gfx::Rect(x, y, width, height);
}

// Get the command ids of the key combinations that are not valid gtk
// accelerators.
int GetCustomCommandId(GdkEventKey* event) {
  // Filter modifier to only include accelerator modifiers.
  guint modifier = event->state & gtk_accelerator_get_default_mod_mask();
  switch (event->keyval) {
    // Gtk doesn't allow GDK_Tab or GDK_ISO_Left_Tab to be an accelerator (see
    // gtk_accelerator_valid), so we need to handle these accelerators
    // manually.
    // Some X clients (e.g. cygwin, NX client, etc.) also send GDK_KP_Tab when
    // typing a tab key. We should also handle GDK_KP_Tab for such X clients as
    // Firefox does.
    case GDK_Tab:
    case GDK_ISO_Left_Tab:
    case GDK_KP_Tab:
      if (GDK_CONTROL_MASK == modifier) {
        return IDC_SELECT_NEXT_TAB;
      } else if ((GDK_CONTROL_MASK | GDK_SHIFT_MASK) == modifier) {
        return IDC_SELECT_PREVIOUS_TAB;
      }
      break;

    default:
      break;
  }
  return -1;
}

// Get the command ids of the accelerators that we don't want the native widget
// to be able to override.
int GetPreHandleCommandId(GdkEventKey* event) {
  // Filter modifier to only include accelerator modifiers.
  guint modifier = event->state & gtk_accelerator_get_default_mod_mask();
  switch (event->keyval) {
    case GDK_Page_Down:
      if (GDK_CONTROL_MASK == modifier) {
        return IDC_SELECT_NEXT_TAB;
      } else if ((GDK_CONTROL_MASK | GDK_SHIFT_MASK) == modifier) {
        return IDC_MOVE_TAB_NEXT;
      }
      break;

    case GDK_Page_Up:
      if (GDK_CONTROL_MASK == modifier) {
        return IDC_SELECT_PREVIOUS_TAB;
      } else if ((GDK_CONTROL_MASK | GDK_SHIFT_MASK) == modifier) {
        return IDC_MOVE_TAB_PREVIOUS;
      }
      break;

    default:
      break;
  }
  return -1;
}

GQuark GetBrowserWindowQuarkKey() {
  static GQuark quark = g_quark_from_static_string(kBrowserWindowKey);
  return quark;
}

}  // namespace

BrowserWindowGtk::BrowserWindowGtk(Browser* browser)
    :  window_(NULL),
       window_has_shown_(false),
       window_container_(NULL),
       window_vbox_(NULL),
       render_area_vbox_(NULL),
       render_area_floating_container_(NULL),
       render_area_event_box_(NULL),
       toolbar_border_(NULL),
       browser_(browser),
       state_(GDK_WINDOW_STATE_WITHDRAWN),
       devtools_dock_side_(DEVTOOLS_DOCK_SIDE_BOTTOM),
       devtools_window_(NULL),
       contents_hsplit_(NULL),
       contents_vsplit_(NULL),
       frame_cursor_(NULL),
       is_active_(false),
       show_state_after_show_(ui::SHOW_STATE_DEFAULT),
       suppress_window_raise_(false),
       accel_group_(NULL),
       fullscreen_exit_bubble_type_(
           FEB_TYPE_BROWSER_FULLSCREEN_EXIT_INSTRUCTION) {
}

BrowserWindowGtk::~BrowserWindowGtk() {
  ui::ActiveWindowWatcherX::RemoveObserver(this);

  browser_->tab_strip_model()->RemoveObserver(this);
}

void BrowserWindowGtk::Init() {
  // We register first so that other views like the toolbar can use the
  // is_active() function in their ActiveWindowChanged() handlers.
  ui::ActiveWindowWatcherX::AddObserver(this);

  use_custom_frame_pref_.Init(
      prefs::kUseCustomChromeFrame,
      browser_->profile()->GetPrefs(),
      base::Bind(&BrowserWindowGtk::OnUseCustomChromeFrameChanged,
                 base::Unretained(this)));

  // Register to be notified of changes to the profile's avatar icon.
  if (!browser_->profile()->IsOffTheRecord()) {
    registrar_.Add(this, chrome::NOTIFICATION_PROFILE_CACHED_INFO_CHANGED,
                   content::NotificationService::AllSources());
  }

  // In some (older) versions of compiz, raising top-level windows when they
  // are partially off-screen causes them to get snapped back on screen, not
  // always even on the current virtual desktop.  If we are running under
  // compiz, suppress such raises, as they are not necessary in compiz anyway.
  if (ui::GuessWindowManager() == ui::WM_COMPIZ)
    suppress_window_raise_ = true;

  window_ = GTK_WINDOW(gtk_window_new(GTK_WINDOW_TOPLEVEL));
  g_object_set_qdata(G_OBJECT(window_), GetBrowserWindowQuarkKey(), this);
  gtk_widget_add_events(GTK_WIDGET(window_), GDK_BUTTON_PRESS_MASK |
                                             GDK_POINTER_MOTION_MASK);

  // Disable the resize gripper on Ubuntu.
  gtk_window_util::DisableResizeGrip(window_);

  // Add this window to its own unique window group to allow for
  // window-to-parent modality.
  gtk_window_group_add_window(gtk_window_group_new(), window_);
  g_object_unref(gtk_window_get_group(window_));

  // Set up a custom WM_CLASS for some sorts of window types.  This allows
  // task switchers to distinguish between main browser windows and e.g
  // app windows.
  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
  if (browser_->is_app()) {
    std::string app_name = browser_->app_name();
    if (app_name != DevToolsWindow::kDevToolsApp) {
      gtk_window_util::SetWindowCustomClass(window_,
          web_app::GetWMClassFromAppName(app_name));
    }
  } else if (command_line.HasSwitch(switches::kUserDataDir)) {
    // Set the class name to e.g. "Chrome (/tmp/my-user-data)".  The
    // class name will show up in the alt-tab list in gnome-shell if
    // you're running a binary that doesn't have a matching .desktop
    // file.
    const std::string user_data_dir =
        command_line.GetSwitchValueNative(switches::kUserDataDir);
    gtk_window_util::SetWindowCustomClass(window_,
        std::string(gdk_get_program_class()) + " (" + user_data_dir + ")");
  }

  // For popups, we initialize widgets then set the window geometry, because
  // popups need the widgets inited before they can set the window size
  // properly. For other windows, we set the geometry first to prevent resize
  // flicker.
  if (browser_->is_type_popup()) {
    gtk_window_set_role(window_, "pop-up");
    InitWidgets();
    SetGeometryHints();
  } else {
    gtk_window_set_role(window_, "browser");
    SetGeometryHints();
    InitWidgets();
  }

  ConnectAccelerators();

  // Set the initial background color of widgets.
  SetBackgroundColor();
  HideUnsupportedWindowFeatures();

  if (UseCustomFrame()) {
    // Setting _GTK_HIDE_TITLEBAR_WHEN_MAXIMIZED tells gnome-shell to not force
    // fullscreen on the window when it matches the desktop size.
    ui::SetHideTitlebarWhenMaximizedProperty(
        ui::GetX11WindowFromGtkWidget(GTK_WIDGET(window_)),
        ui::HIDE_TITLEBAR_WHEN_MAXIMIZED);
  }
}

gboolean BrowserWindowGtk::OnCustomFrameExpose(GtkWidget* widget,
                                               GdkEventExpose* event) {
  TRACE_EVENT0("ui::gtk", "BrowserWindowGtk::OnCustomFrameExpose");

  // Draw the default background.
  cairo_t* cr = gdk_cairo_create(gtk_widget_get_window(widget));
  gdk_cairo_rectangle(cr, &event->area);
  cairo_clip(cr);

  if (UsingCustomPopupFrame()) {
    DrawPopupFrame(cr, widget, event);
  } else {
    DrawCustomFrame(cr, widget, event);
  }

  DrawContentShadow(cr);

  cairo_destroy(cr);

  if (UseCustomFrame() && !IsMaximized())
    DrawCustomFrameBorder(widget);

  return FALSE;  // Allow subwidgets to paint.
}

void BrowserWindowGtk::DrawCustomFrameBorder(GtkWidget* widget) {
  static NineBox* custom_frame_border = NULL;
  if (!custom_frame_border) {
    custom_frame_border = new NineBox(IDR_WINDOW_TOP_LEFT_CORNER,
                                      IDR_WINDOW_TOP_CENTER,
                                      IDR_WINDOW_TOP_RIGHT_CORNER,
                                      IDR_WINDOW_LEFT_SIDE,
                                      0,
                                      IDR_WINDOW_RIGHT_SIDE,
                                      IDR_WINDOW_BOTTOM_LEFT_CORNER,
                                      IDR_WINDOW_BOTTOM_CENTER,
                                      IDR_WINDOW_BOTTOM_RIGHT_CORNER);
  }
  custom_frame_border->RenderToWidget(widget);
}

void BrowserWindowGtk::DrawContentShadow(cairo_t* cr) {
  // Draw the shadow above the toolbar. Tabs on the tabstrip will draw over us.
  ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
  int left_x, top_y;
  gtk_widget_translate_coordinates(toolbar_->widget(),
      GTK_WIDGET(window_), 0, 0, &left_x,
      &top_y);

  GtkAllocation window_vbox_allocation;
  gtk_widget_get_allocation(window_vbox_, &window_vbox_allocation);
  int center_width = window_vbox_allocation.width;

  gfx::CairoCachedSurface* top_center =
      rb.GetNativeImageNamed(IDR_CONTENT_TOP_CENTER).ToCairo();
  gfx::CairoCachedSurface* top_right =
      rb.GetNativeImageNamed(IDR_CONTENT_TOP_RIGHT_CORNER).ToCairo();
  gfx::CairoCachedSurface* top_left =
      rb.GetNativeImageNamed(IDR_CONTENT_TOP_LEFT_CORNER).ToCairo();

  int center_left_x = left_x;
  if (ShouldDrawContentDropShadow()) {
    // Don't draw over the corners.
    center_left_x += top_left->Width() - kContentShadowThickness;
    center_width -= (top_left->Width() + top_right->Width());
    center_width += 2 * kContentShadowThickness;
  }

  top_center->SetSource(cr, GTK_WIDGET(window_),
                        center_left_x, top_y - kContentShadowThickness);
  cairo_pattern_set_extend(cairo_get_source(cr), CAIRO_EXTEND_REPEAT);
  cairo_rectangle(cr, center_left_x, top_y - kContentShadowThickness,
                  center_width, top_center->Height());
  cairo_fill(cr);

  // Only draw the rest of the shadow if the user has the custom frame enabled
  // and the browser is not maximized.
  if (!ShouldDrawContentDropShadow())
    return;

  // The top left corner has a width of 3 pixels. On Windows, the last column
  // of pixels overlap the toolbar. We just crop it off on Linux.  The top
  // corners extend to the base of the toolbar (one pixel above the dividing
  // line).
  int right_x = center_left_x + center_width;
  top_left->SetSource(cr, GTK_WIDGET(window_),
      left_x - kContentShadowThickness, top_y - kContentShadowThickness);
  // The toolbar is shorter in location bar only mode so clip the image to the
  // height of the toolbar + the amount of shadow above the toolbar.
  cairo_rectangle(cr,
      left_x - kContentShadowThickness,
      top_y - kContentShadowThickness,
      top_left->Width(),
      top_left->Height());
  cairo_fill(cr);

  // Likewise, we crop off the left column of pixels for the top right corner.
  top_right->SetSource(cr, GTK_WIDGET(window_),
                       right_x, top_y - kContentShadowThickness);
  cairo_rectangle(cr,
      right_x,
      top_y - kContentShadowThickness,
      top_right->Width(),
      top_right->Height());
  cairo_fill(cr);

  // Fill in the sides.  As above, we only draw 2 of the 3 columns on Linux.
  int bottom_y;
  gtk_widget_translate_coordinates(window_vbox_,
      GTK_WIDGET(window_),
      0, window_vbox_allocation.height,
      NULL, &bottom_y);
  // |side_y| is where to start drawing the side shadows.  The top corners draw
  // the sides down to the bottom of the toolbar.
  int side_y = top_y - kContentShadowThickness + top_right->Height();
  // |side_height| is how many pixels to draw for the side borders.  We do one
  // pixel before the bottom of the web contents because that extra pixel is
  // drawn by the bottom corners.
  int side_height = bottom_y - side_y - 1;
  if (side_height > 0) {
    gfx::CairoCachedSurface* left =
        rb.GetNativeImageNamed(IDR_CONTENT_LEFT_SIDE).ToCairo();
    left->SetSource(cr, GTK_WIDGET(window_),
                    left_x - kContentShadowThickness, side_y);
    cairo_pattern_set_extend(cairo_get_source(cr), CAIRO_EXTEND_REPEAT);
    cairo_rectangle(cr,
        left_x - kContentShadowThickness,
        side_y,
        kContentShadowThickness,
        side_height);
    cairo_fill(cr);

    gfx::CairoCachedSurface* right =
        rb.GetNativeImageNamed(IDR_CONTENT_RIGHT_SIDE).ToCairo();
    int right_side_x =
        right_x + top_right->Width() - kContentShadowThickness - 1;
    right->SetSource(cr, GTK_WIDGET(window_), right_side_x, side_y);
    cairo_pattern_set_extend(cairo_get_source(cr), CAIRO_EXTEND_REPEAT);
    cairo_rectangle(cr,
        right_side_x,
        side_y,
        kContentShadowThickness,
        side_height);
    cairo_fill(cr);
  }

  // Draw the bottom corners.  The bottom corners also draw the bottom row of
  // pixels of the side shadows.
  gfx::CairoCachedSurface* bottom_left =
      rb.GetNativeImageNamed(IDR_CONTENT_BOTTOM_LEFT_CORNER).ToCairo();
  bottom_left->SetSource(cr, GTK_WIDGET(window_),
                         left_x - kContentShadowThickness, bottom_y - 1);
  cairo_paint(cr);

  gfx::CairoCachedSurface* bottom_right =
      rb.GetNativeImageNamed(IDR_CONTENT_BOTTOM_RIGHT_CORNER).ToCairo();
  bottom_right->SetSource(cr, GTK_WIDGET(window_), right_x - 1, bottom_y - 1);
  cairo_paint(cr);

  // Finally, draw the bottom row. Since we don't overlap the contents, we clip
  // the top row of pixels.
  gfx::CairoCachedSurface* bottom =
      rb.GetNativeImageNamed(IDR_CONTENT_BOTTOM_CENTER).ToCairo();
  bottom->SetSource(cr, GTK_WIDGET(window_), left_x + 1, bottom_y - 1);
  cairo_pattern_set_extend(cairo_get_source(cr), CAIRO_EXTEND_REPEAT);
  cairo_rectangle(cr,
      left_x + 1,
      bottom_y,
      window_vbox_allocation.width - 2,
      kContentShadowThickness);
  cairo_fill(cr);
}

void BrowserWindowGtk::DrawPopupFrame(cairo_t* cr,
                                      GtkWidget* widget,
                                      GdkEventExpose* event) {
  ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();

  // Like DrawCustomFrame(), except that we use the unthemed resources to draw
  // the background. We do this because we can't rely on sane images in the
  // theme that we can draw text on. (We tried using the tab background, but
  // that has inverse saturation from what the user usually expects).
  int image_name = GetThemeFrameResource();
  gfx::CairoCachedSurface* surface =
      rb.GetNativeImageNamed(image_name).ToCairo();
  surface->SetSource(cr, widget, 0, GetVerticalOffset());
  cairo_pattern_set_extend(cairo_get_source(cr), CAIRO_EXTEND_REFLECT);
  cairo_rectangle(cr, event->area.x, event->area.y,
                  event->area.width, event->area.height);
  cairo_fill(cr);
}

void BrowserWindowGtk::DrawCustomFrame(cairo_t* cr,
                                       GtkWidget* widget,
                                       GdkEventExpose* event) {
  GtkThemeService* theme_provider = GtkThemeService::GetFrom(
      browser()->profile());

  int image_name = GetThemeFrameResource();

  gfx::CairoCachedSurface* surface = theme_provider->GetImageNamed(
      image_name).ToCairo();
  if (event->area.y < surface->Height()) {
    surface->SetSource(cr, widget, 0, GetVerticalOffset());

    // The frame background isn't tiled vertically.
    cairo_pattern_set_extend(cairo_get_source(cr), CAIRO_EXTEND_REPEAT);
    cairo_rectangle(cr, event->area.x, event->area.y,
                    event->area.width, surface->Height() - event->area.y);
    cairo_fill(cr);
  }

  if (theme_provider->HasCustomImage(IDR_THEME_FRAME_OVERLAY) &&
      !browser()->profile()->IsOffTheRecord()) {
    gfx::CairoCachedSurface* theme_overlay = theme_provider->GetImageNamed(
        DrawFrameAsActive() ? IDR_THEME_FRAME_OVERLAY
        : IDR_THEME_FRAME_OVERLAY_INACTIVE).ToCairo();
    theme_overlay->SetSource(cr, widget, 0, GetVerticalOffset());
    cairo_paint(cr);
  }
}

int BrowserWindowGtk::GetVerticalOffset() {
  return (IsMaximized() || (!UseCustomFrame())) ?
      -kCustomFrameBackgroundVerticalOffset : 0;
}

int BrowserWindowGtk::GetThemeFrameResource() {
  bool incognito = browser()->profile()->IsOffTheRecord();
  int image_name;
  if (DrawFrameAsActive()) {
    image_name = incognito ? IDR_THEME_FRAME_INCOGNITO : IDR_THEME_FRAME;
  } else {
    image_name = incognito ? IDR_THEME_FRAME_INCOGNITO_INACTIVE :
                 IDR_THEME_FRAME_INACTIVE;
  }

  return image_name;
}

void BrowserWindowGtk::Show() {
  // The Browser associated with this browser window must become the active
  // browser at the time Show() is called. This is the natural behaviour under
  // Windows, but gtk_widget_show won't show the widget (and therefore won't
  // call OnFocusIn()) until we return to the runloop. Therefore any calls to
  // chrome::FindLastActiveWithHostDesktopType will return the previous
  // browser instead if we don't explicitly set it here.
  BrowserList::SetLastActive(browser());

  gtk_window_present(window_);
  if (show_state_after_show_ == ui::SHOW_STATE_MAXIMIZED) {
    gtk_window_maximize(window_);
    show_state_after_show_ = ui::SHOW_STATE_NORMAL;
  } else if (show_state_after_show_ == ui::SHOW_STATE_MINIMIZED) {
    gtk_window_iconify(window_);
    show_state_after_show_ = ui::SHOW_STATE_NORMAL;
  }

  // If we have sized the window by setting a size request for the render
  // area, then undo it so that the render view can later adjust its own
  // size.
  gtk_widget_set_size_request(contents_container_->widget(), -1, -1);

  window_has_shown_ = true;
  browser()->OnWindowDidShow();
  if (devtools_window_)
    UpdateDevToolsSplitPosition();
}

void BrowserWindowGtk::ShowInactive() {
  gtk_window_set_focus_on_map(window_, false);
  gtk_widget_show(GTK_WIDGET(window_));
}

void BrowserWindowGtk::Hide() {
  // Not implemented.
}

void BrowserWindowGtk::SetBoundsImpl(const gfx::Rect& bounds,
                                     bool exterior,
                                     bool move) {
  gint x = static_cast<gint>(bounds.x());
  gint y = static_cast<gint>(bounds.y());
  gint width = static_cast<gint>(bounds.width());
  gint height = static_cast<gint>(bounds.height());

  if (move)
    gtk_window_move(window_, x, y);

  if (exterior) {
    gtk_window_util::SetWindowSize(window_, gfx::Size(width, height));
  } else {
    gtk_widget_set_size_request(contents_container_->widget(),
                                width, height);
  }
}

void BrowserWindowGtk::SetBounds(const gfx::Rect& bounds) {
  if (IsFullscreen())
    ExitFullscreen();
  SetBoundsImpl(bounds, true, true);
}

void BrowserWindowGtk::Close() {
  // We're already closing.  Do nothing.
  if (!window_)
    return;

  if (!CanClose())
    return;

  // We're going to destroy the window, make sure the tab strip isn't running
  // any animations which may still reference GtkWidgets.
  tabstrip_->StopAnimation();

  SaveWindowPosition();

  if (accel_group_) {
    // Disconnecting the keys we connected to our accelerator group frees the
    // closures allocated in ConnectAccelerators.
    AcceleratorsGtk* accelerators = AcceleratorsGtk::GetInstance();
    for (AcceleratorsGtk::const_iterator iter = accelerators->begin();
         iter != accelerators->end(); ++iter) {
      gtk_accel_group_disconnect_key(accel_group_,
          ui::GetGdkKeyCodeForAccelerator(iter->second),
          ui::GetGdkModifierForAccelerator(iter->second));
    }
    gtk_window_remove_accel_group(window_, accel_group_);
    g_object_unref(accel_group_);
    accel_group_ = NULL;
  }

  // Cancel any pending callback from the window configure debounce timer.
  window_configure_debounce_timer_.Stop();

  // Likewise for the loading animation.
  loading_animation_timer_.Stop();

  GtkWidget* window = GTK_WIDGET(window_);
  // To help catch bugs in any event handlers that might get fired during the
  // destruction, set window_ to NULL before any handlers will run.
  window_ = NULL;
  // Avoid use-after-free in any code that runs after Close() and forgets to
  // check window_.
  window_container_ = NULL;
  window_vbox_ = NULL;
  render_area_vbox_ = NULL;
  render_area_floating_container_ = NULL;
  render_area_event_box_ = NULL;
  toolbar_border_ = NULL;
  contents_vsplit_ = NULL;
  contents_hsplit_ = NULL;

  window_has_shown_ = false;
  titlebar_->set_window(NULL);

  // We don't want GlobalMenuBar handling any notifications or commands after
  // the window is destroyed.
  global_menu_bar_->Disable();
  gtk_widget_destroy(window);
}

void BrowserWindowGtk::Activate() {
  gtk_window_present(window_);
}

void BrowserWindowGtk::Deactivate() {
  gdk_window_lower(gtk_widget_get_window(GTK_WIDGET(window_)));
}

bool BrowserWindowGtk::IsActive() const {
  if (ui::ActiveWindowWatcherX::WMSupportsActivation())
    return is_active_;

  // This still works even though we don't get the activation notification.
  return gtk_window_is_active(window_);
}

void BrowserWindowGtk::FlashFrame(bool flash) {
  // May not be respected by all window managers.
  gtk_window_set_urgency_hint(window_, flash);
}

bool BrowserWindowGtk::IsAlwaysOnTop() const {
  return false;
}

gfx::NativeWindow BrowserWindowGtk::GetNativeWindow() {
  return window_;
}

BrowserWindowTesting* BrowserWindowGtk::GetBrowserWindowTesting() {
  NOTIMPLEMENTED();
  return NULL;
}

StatusBubble* BrowserWindowGtk::GetStatusBubble() {
  return status_bubble_.get();
}

void BrowserWindowGtk::UpdateTitleBar() {
  TRACE_EVENT0("ui::gtk", "BrowserWindowGtk::UpdateTitleBar");
  string16 title = browser_->GetWindowTitleForCurrentTab();
  gtk_window_set_title(window_, UTF16ToUTF8(title).c_str());
  if (ShouldShowWindowIcon())
    titlebar_->UpdateTitleAndIcon();
}

void BrowserWindowGtk::BookmarkBarStateChanged(
    BookmarkBar::AnimateChangeType change_type) {
  MaybeShowBookmarkBar(change_type == BookmarkBar::ANIMATE_STATE_CHANGE);
}

void BrowserWindowGtk::UpdateDevTools() {
  UpdateDevToolsForContents(
      browser_->tab_strip_model()->GetActiveWebContents());
}

void BrowserWindowGtk::UpdateLoadingAnimations(bool should_animate) {
  if (should_animate) {
    if (!loading_animation_timer_.IsRunning()) {
      // Loads are happening, and the timer isn't running, so start it.
      loading_animation_timer_.Start(FROM_HERE,
          base::TimeDelta::FromMilliseconds(kLoadingAnimationFrameTimeMs), this,
          &BrowserWindowGtk::LoadingAnimationCallback);
    }
  } else {
    if (loading_animation_timer_.IsRunning()) {
      loading_animation_timer_.Stop();
      // Loads are now complete, update the state if a task was scheduled.
      LoadingAnimationCallback();
    }
  }
}

void BrowserWindowGtk::LoadingAnimationCallback() {
  if (browser_->is_type_tabbed()) {
    // Loading animations are shown in the tab for tabbed windows.  We check the
    // browser type instead of calling IsTabStripVisible() because the latter
    // will return false for fullscreen windows, but we still need to update
    // their animations (so that when they come out of fullscreen mode they'll
    // be correct).
    tabstrip_->UpdateLoadingAnimations();
  } else if (ShouldShowWindowIcon()) {
    // ... or in the window icon area for popups and app windows.
    WebContents* web_contents =
        browser_->tab_strip_model()->GetActiveWebContents();
    // GetSelectedTabContents can return NULL for example under Purify when
    // the animations are running slowly and this function is called on
    // a timer through LoadingAnimationCallback.
    titlebar_->UpdateThrobber(web_contents);
  }
}

void BrowserWindowGtk::SetStarredState(bool is_starred) {
  toolbar_->GetLocationBarView()->SetStarred(is_starred);
}

void BrowserWindowGtk::ZoomChangedForActiveTab(bool can_show_bubble) {
  toolbar_->GetLocationBarView()->ZoomChangedForActiveTab(
      can_show_bubble && !toolbar_->IsWrenchMenuShowing());
}

gfx::Rect BrowserWindowGtk::GetRestoredBounds() const {
  return restored_bounds_;
}

gfx::Rect BrowserWindowGtk::GetBounds() const {
  return bounds_;
}

bool BrowserWindowGtk::IsMaximized() const {
  return (state_ & GDK_WINDOW_STATE_MAXIMIZED);
}

bool BrowserWindowGtk::IsMinimized() const {
  return (state_ & GDK_WINDOW_STATE_ICONIFIED);
}

void BrowserWindowGtk::Maximize() {
  gtk_window_maximize(window_);
}

void BrowserWindowGtk::Minimize() {
  gtk_window_iconify(window_);
}

void BrowserWindowGtk::Restore() {
  if (IsMaximized())
    UnMaximize();
  else if (IsMinimized())
    gtk_window_deiconify(window_);
}

bool BrowserWindowGtk::ShouldDrawContentDropShadow() const {
  return !IsMaximized() && UseCustomFrame();
}

void BrowserWindowGtk::EnterFullscreen(
      const GURL& url, FullscreenExitBubbleType type) {
  // gtk_window_(un)fullscreen asks the window manager to toggle the EWMH
  // for fullscreen windows.  Not all window managers support this.
  gtk_window_fullscreen(window_);
  fullscreen_exit_bubble_type_ = type;
}

void BrowserWindowGtk::UpdateFullscreenExitBubbleContent(
     const GURL& url,
      FullscreenExitBubbleType bubble_type) {
  if (!window_) {
    // Don't create a fullscreen bubble for a closing window.
    return;
  } else if (bubble_type == FEB_TYPE_NONE) {
   fullscreen_exit_bubble_.reset();
  } else if (fullscreen_exit_bubble_.get()) {
   fullscreen_exit_bubble_->UpdateContent(url, bubble_type);
  } else {
    fullscreen_exit_bubble_.reset(new FullscreenExitBubbleGtk(
        GTK_FLOATING_CONTAINER(render_area_floating_container_),
        browser(),
        url,
        bubble_type));
  }
}

void BrowserWindowGtk::ExitFullscreen() {
  // Work around a bug where if we try to unfullscreen, metacity immediately
  // fullscreens us again.  This is a little flickery and not necessary if
  // there's a gnome-panel, but it's not easy to detect whether there's a
  // panel or not.
  bool unmaximize_before_unfullscreen = IsMaximized() &&
      ui::GuessWindowManager() == ui::WM_METACITY;
  if (unmaximize_before_unfullscreen)
    UnMaximize();

  gtk_window_unfullscreen(window_);

  if (unmaximize_before_unfullscreen)
    gtk_window_maximize(window_);
}

bool BrowserWindowGtk::ShouldHideUIForFullscreen() const {
  return IsFullscreen();
}

bool BrowserWindowGtk::IsFullscreen() const {
  return (state_ & GDK_WINDOW_STATE_FULLSCREEN);
}

bool BrowserWindowGtk::IsFullscreenBubbleVisible() const {
  return fullscreen_exit_bubble_ != NULL;
}

LocationBar* BrowserWindowGtk::GetLocationBar() const {
  return toolbar_->GetLocationBar();
}

void BrowserWindowGtk::SetFocusToLocationBar(bool select_all) {
  if (!IsFullscreen())
    GetLocationBar()->FocusLocation(select_all);
}

void BrowserWindowGtk::UpdateReloadStopState(bool is_loading, bool force) {
  toolbar_->GetReloadButton()->ChangeMode(
      is_loading ? ReloadButtonGtk::MODE_STOP : ReloadButtonGtk::MODE_RELOAD,
      force);
}

void BrowserWindowGtk::UpdateToolbar(content::WebContents* contents,
                                     bool should_restore_state) {
  TRACE_EVENT0("ui::gtk", "BrowserWindowGtk::UpdateToolbar");
  toolbar_->UpdateWebContents(contents, should_restore_state);
}

void BrowserWindowGtk::FocusToolbar() {
  NOTIMPLEMENTED();
}

void BrowserWindowGtk::FocusAppMenu() {
  NOTIMPLEMENTED();
}

void BrowserWindowGtk::FocusBookmarksToolbar() {
  NOTIMPLEMENTED();
}

void BrowserWindowGtk::RotatePaneFocus(bool forwards) {
  NOTIMPLEMENTED();
}

bool BrowserWindowGtk::IsBookmarkBarVisible() const {
  return browser_->SupportsWindowFeature(Browser::FEATURE_BOOKMARKBAR) &&
         bookmark_bar_.get() &&
         browser_->profile()->GetPrefs()->GetBoolean(prefs::kShowBookmarkBar);
}

bool BrowserWindowGtk::IsBookmarkBarAnimating() const {
  if (IsBookmarkBarSupported() && bookmark_bar_->IsAnimating())
    return true;
  return false;
}

bool BrowserWindowGtk::IsTabStripEditable() const {
  return !tabstrip()->IsDragSessionActive() &&
      !tabstrip()->IsActiveDropTarget();
}

bool BrowserWindowGtk::IsToolbarVisible() const {
  return IsToolbarSupported();
}

gfx::Rect BrowserWindowGtk::GetRootWindowResizerRect() const {
  return gfx::Rect();
}

void BrowserWindowGtk::ConfirmAddSearchProvider(TemplateURL* template_url,
                                                Profile* profile) {
  new EditSearchEngineDialog(window_, template_url, NULL, profile);
}

void BrowserWindowGtk::ToggleBookmarkBar() {
  chrome::ToggleBookmarkBarWhenVisible(browser_->profile());
}

void BrowserWindowGtk::ShowUpdateChromeDialog() {
  UpdateRecommendedDialog::Show(window_);
}

void BrowserWindowGtk::ShowBookmarkBubble(const GURL& url,
                                          bool already_bookmarked) {
  toolbar_->GetLocationBarView()->ShowStarBubble(url, !already_bookmarked);
}

void BrowserWindowGtk::ShowChromeToMobileBubble() {
  toolbar_->GetLocationBarView()->ShowChromeToMobileBubble();
}

#if defined(ENABLE_ONE_CLICK_SIGNIN)
void BrowserWindowGtk::ShowOneClickSigninBubble(
    OneClickSigninBubbleType type,
    const StartSyncCallback& start_sync_callback) {
  new OneClickSigninBubbleGtk(this, type, start_sync_callback);
}
#endif

bool BrowserWindowGtk::IsDownloadShelfVisible() const {
  return download_shelf_.get() && download_shelf_->IsShowing();
}

DownloadShelf* BrowserWindowGtk::GetDownloadShelf() {
  if (!download_shelf_.get())
    download_shelf_.reset(new DownloadShelfGtk(browser_.get(),
                                               render_area_vbox_));
  return download_shelf_.get();
}

void BrowserWindowGtk::UserChangedTheme() {
  SetBackgroundColor();
  InvalidateWindow();
  UpdateWindowShape(bounds_.width(), bounds_.height());
}

int BrowserWindowGtk::GetExtraRenderViewHeight() const {
  int sum = infobar_container_->TotalHeightOfAnimatingBars();
  if (IsBookmarkBarSupported() && bookmark_bar_->IsAnimating())
    sum += bookmark_bar_->GetHeight();
  if (download_shelf_.get() && download_shelf_->IsClosing())
    sum += download_shelf_->GetHeight();
  return sum;
}

void BrowserWindowGtk::WebContentsFocused(WebContents* contents) {
  NOTIMPLEMENTED();
}

void BrowserWindowGtk::ShowWebsiteSettings(
    Profile* profile,
    content::WebContents* web_contents,
    const GURL& url,
    const content::SSLStatus& ssl,
    bool show_history) {
  WebsiteSettingsPopupGtk::Show(GetNativeWindow(), profile,
                                web_contents, url, ssl);
}

void BrowserWindowGtk::ShowAppMenu() {
  toolbar_->ShowAppMenu();
}

bool BrowserWindowGtk::PreHandleKeyboardEvent(
    const NativeWebKeyboardEvent& event, bool* is_keyboard_shortcut) {
  GdkEventKey* os_event = &event.os_event->key;

  if (!os_event || event.type != WebKit::WebInputEvent::RawKeyDown)
    return false;

  if (ExtensionKeybindingRegistryGtk::shortcut_handling_suspended())
    return false;

  // We first find out the browser command associated to the |event|.
  // Then if the command is a reserved one, and should be processed immediately
  // according to the |event|, the command will be executed immediately.
  // Otherwise we just set |*is_keyboard_shortcut| properly and return false.

  // First check if it's a custom accelerator.
  int id = GetCustomCommandId(os_event);

  // Then check if it's a predefined accelerator bound to the window.
  if (id == -1) {
    // This piece of code is based on the fact that calling
    // gtk_window_activate_key() method against |window_| may only trigger a
    // browser command execution, by matching a global accelerator
    // defined in above |kAcceleratorMap|.
    //
    // Here we need to retrieve the command id (if any) associated to the
    // keyboard event. Instead of looking up the command id in above
    // |kAcceleratorMap| table by ourselves, we block the command execution of
    // the |browser_| object then send the keyboard event to the |window_| by
    // calling gtk_window_activate_key() method, as if we are activating an
    // accelerator key. Then we can retrieve the command id from the
    // |browser_| object.
    //
    // Pros of this approach:
    // 1. We don't need to care about keyboard layout problem, as
    //    gtk_window_activate_key() method handles it for us.
    //
    // Cons:
    // 1. The logic is a little complicated.
    // 2. We should be careful not to introduce any accelerators that trigger
    //    customized code instead of browser commands.
    browser_->command_controller()->SetBlockCommandExecution(true);
    gtk_window_activate_key(window_, os_event);
    // We don't need to care about the WindowOpenDisposition value,
    // because all commands executed in this path use the default value.
    id = browser_->command_controller()->GetLastBlockedCommand(NULL);
    browser_->command_controller()->SetBlockCommandExecution(false);
  }

  if (id == -1)
    return false;

  // Executing the command may cause |this| object to be destroyed.
  if (browser_->command_controller()->IsReservedCommandOrKey(id, event) &&
      !event.match_edit_command) {
    return chrome::ExecuteCommand(browser_.get(), id);
  }

  // The |event| is a keyboard shortcut.
  DCHECK(is_keyboard_shortcut != NULL);
  *is_keyboard_shortcut = true;

  return false;
}

void BrowserWindowGtk::HandleKeyboardEvent(
    const NativeWebKeyboardEvent& event) {
  GdkEventKey* os_event = &event.os_event->key;

  if (!os_event || event.type != WebKit::WebInputEvent::RawKeyDown)
    return;

  // Handles a key event in following sequence:
  // 1. Our special key accelerators, such as ctrl-tab, etc.
  // 2. Gtk accelerators.
  // This sequence matches the default key press handler of GtkWindow.
  //
  // It's not necessary to care about the keyboard layout, as
  // gtk_window_activate_key() takes care of it automatically.
  int id = GetCustomCommandId(os_event);
  if (id != -1)
    chrome::ExecuteCommand(browser_.get(), id);
  else
    gtk_window_activate_key(window_, os_event);
}

void BrowserWindowGtk::ShowCreateChromeAppShortcutsDialog(
    Profile* profile, const extensions::Extension* app) {
  CreateChromeApplicationShortcutsDialogGtk::Show(window_, profile, app);
}

void BrowserWindowGtk::Cut() {
  gtk_window_util::DoCut(
      window_, browser_->tab_strip_model()->GetActiveWebContents());
}

void BrowserWindowGtk::Copy() {
  gtk_window_util::DoCopy(
      window_, browser_->tab_strip_model()->GetActiveWebContents());
}

void BrowserWindowGtk::Paste() {
  gtk_window_util::DoPaste(
      window_, browser_->tab_strip_model()->GetActiveWebContents());
}

gfx::Rect BrowserWindowGtk::GetInstantBounds() {
  return ui::GetWidgetScreenBounds(contents_container_->widget());
}

WindowOpenDisposition BrowserWindowGtk::GetDispositionForPopupBounds(
    const gfx::Rect& bounds) {
  return NEW_POPUP;
}

FindBar* BrowserWindowGtk::CreateFindBar() {
  return new FindBarGtk(this);
}

WebContentsModalDialogHost* BrowserWindowGtk::GetWebContentsModalDialogHost() {
  return NULL;
}

void BrowserWindowGtk::ShowAvatarBubble(WebContents* web_contents,
                                        const gfx::Rect& rect) {
  GtkWidget* widget = web_contents->GetView()->GetContentNativeView();
  new AvatarMenuBubbleGtk(browser_.get(), widget,
      BubbleGtk::ANCHOR_TOP_LEFT, &rect);
}

void BrowserWindowGtk::ShowAvatarBubbleFromAvatarButton() {
  if (titlebar_->avatar_button())
    titlebar_->avatar_button()->ShowAvatarBubble();
}

void BrowserWindowGtk::ShowPasswordGenerationBubble(
    const gfx::Rect& rect,
    const content::PasswordForm& form,
    autofill::PasswordGenerator* password_generator) {
  WebContents* web_contents =
      browser_->tab_strip_model()->GetActiveWebContents();
  if (!web_contents || !web_contents->GetView()->GetContentNativeView()) {
    return;
  }

  new PasswordGenerationBubbleGtk(rect, form, web_contents, password_generator);
}

void BrowserWindowGtk::ConfirmBrowserCloseWithPendingDownloads() {
  DownloadInProgressDialogGtk::Show(browser(), GetNativeWindow());
}

void BrowserWindowGtk::Observe(int type,
                               const content::NotificationSource& source,
                               const content::NotificationDetails& details) {
  DCHECK_EQ(chrome::NOTIFICATION_PROFILE_CACHED_INFO_CHANGED, type);
  // The profile avatar icon may have changed.
  gtk_util::SetWindowIcon(window_, browser_->profile());
}

void BrowserWindowGtk::TabDetachedAt(WebContents* contents, int index) {
  // We use index here rather than comparing |contents| because by this time
  // the model has already removed |contents| from its list, so
  // browser_->tab_strip_model()->GetActiveWebContents() will return NULL or
  // something else.
  if (index == browser_->tab_strip_model()->active_index()) {
    infobar_container_->ChangeInfoBarService(NULL);
    UpdateDevToolsForContents(NULL);
  }
  contents_container_->DetachTab(contents);
}

void BrowserWindowGtk::ActiveTabChanged(WebContents* old_contents,
                                        WebContents* new_contents,
                                        int index,
                                        int reason) {
  TRACE_EVENT0("ui::gtk", "BrowserWindowGtk::ActiveTabChanged");
  if (old_contents && !old_contents->IsBeingDestroyed())
    old_contents->GetView()->StoreFocus();

  // Update various elements that are interested in knowing the current
  // WebContents.
  UpdateDevToolsForContents(new_contents);
  InfoBarService* new_infobar_service =
      InfoBarService::FromWebContents(new_contents);
  infobar_container_->ChangeInfoBarService(new_infobar_service);
  contents_container_->SetTab(new_contents);

  // TODO(estade): after we manage browser activation, add a check to make sure
  // we are the active browser before calling RestoreFocus().
  if (!browser_->tab_strip_model()->closing_all()) {
    new_contents->GetView()->RestoreFocus();
    FindTabHelper* find_tab_helper =
        FindTabHelper::FromWebContents(new_contents);
    if (find_tab_helper->find_ui_active())
      browser_->GetFindBarController()->find_bar()->SetFocusAndSelection();
  }

  // Update all the UI bits.
  UpdateTitleBar();
  MaybeShowBookmarkBar(false);
}

void BrowserWindowGtk::ActiveWindowChanged(GdkWindow* active_window) {
  // Do nothing if we're in the process of closing the browser window.
  if (!window_)
    return;

  bool is_active = gtk_widget_get_window(GTK_WIDGET(window_)) == active_window;
  bool changed = (is_active != is_active_);

  if (is_active && changed) {
    // If there's an app modal dialog (e.g., JS alert), try to redirect
    // the user's attention to the window owning the dialog.
    if (AppModalDialogQueue::GetInstance()->HasActiveDialog()) {
      AppModalDialogQueue::GetInstance()->ActivateModalDialog();
      return;
    }
  }

  is_active_ = is_active;
  if (changed) {
    SetBackgroundColor();
    InvalidateWindow();
    // For some reason, the above two calls cause the window shape to be
    // lost so reset it.
    UpdateWindowShape(bounds_.width(), bounds_.height());
  }
}

SkColor BrowserWindowGtk::GetInfoBarSeparatorColor() const {
  GtkThemeService* theme_service = GtkThemeService::GetFrom(
      browser()->profile());
  return gfx::GdkColorToSkColor(theme_service->GetBorderColor());
}

void BrowserWindowGtk::InfoBarContainerStateChanged(bool is_animating) {
  InvalidateInfoBarBits();
}

bool BrowserWindowGtk::DrawInfoBarArrows(int* x) const {
  if (x) {
    // This is a views specific call that made its way into the interface. We
    // go through GetXPositionOfLocationIcon() since we need widget relativity.
    *x = 0;
    NOTREACHED();
  }
  return true;
}

extensions::ActiveTabPermissionGranter*
    BrowserWindowGtk::GetActiveTabPermissionGranter() {
  WebContents* tab = GetDisplayedTab();
  if (!tab)
    return NULL;
  return extensions::TabHelper::FromWebContents(tab)->
      active_tab_permission_granter();
}

void BrowserWindowGtk::DestroyBrowser() {
  browser_.reset();
}

gboolean BrowserWindowGtk::OnConfigure(GtkWidget* widget,
                                       GdkEventConfigure* event) {
  gfx::Rect bounds(event->x, event->y, event->width, event->height);

  // When the window moves, we'll get multiple configure-event signals. We can
  // also get events when the bounds haven't changed, but the window's stacking
  // has, which we aren't interested in. http://crbug.com/70125
  if (bounds == configure_bounds_)
    return FALSE;

  GetLocationBar()->GetLocationEntry()->CloseOmniboxPopup();

  WebContents* tab = GetDisplayedTab();
  if (tab)
    tab->GetRenderViewHost()->NotifyMoveOrResizeStarted();

  if (bounds_.size() != bounds.size())
    UpdateWindowShape(bounds.width(), bounds.height());

  // We update |bounds_| but not |restored_bounds_| here.  The latter needs
  // to be updated conditionally when the window is non-maximized and non-
  // fullscreen, but whether those state updates have been processed yet is
  // window-manager specific.  We update |restored_bounds_| in the debounced
  // handler below, after the window state has been updated.
  bounds_ = bounds;
  configure_bounds_ = bounds;

  // The GdkEventConfigure* we get here doesn't have quite the right
  // coordinates though (they're relative to the drawable window area, rather
  // than any window manager decorations, if enabled), so we need to call
  // gtk_window_get_position() to get the right values. (Otherwise session
  // restore, if enabled, will restore windows to incorrect positions.) That's
  // a round trip to the X server though, so we set a debounce timer and only
  // call it (in OnDebouncedBoundsChanged() below) after we haven't seen a
  // reconfigure event in a short while.
  // We don't use Reset() because the timer may not yet be running.
  // (In that case Stop() is a no-op.)
  window_configure_debounce_timer_.Stop();
  window_configure_debounce_timer_.Start(FROM_HERE,
      base::TimeDelta::FromMilliseconds(kDebounceTimeoutMilliseconds), this,
      &BrowserWindowGtk::OnDebouncedBoundsChanged);

  return FALSE;
}

void BrowserWindowGtk::OnDebouncedBoundsChanged() {
  gtk_window_util::UpdateWindowPosition(this, &bounds_, &restored_bounds_);
  SaveWindowPosition();
}

gboolean BrowserWindowGtk::OnWindowState(GtkWidget* sender,
                                         GdkEventWindowState* event) {
  state_ = event->new_window_state;

  if (event->changed_mask & GDK_WINDOW_STATE_FULLSCREEN) {
    browser_->WindowFullscreenStateChanged();
    if (state_ & GDK_WINDOW_STATE_FULLSCREEN) {
      UpdateCustomFrame();
      toolbar_->Hide();
      tabstrip_->Hide();
      if (bookmark_bar_.get())
        gtk_widget_hide(bookmark_bar_->widget());
      bool is_kiosk =
          CommandLine::ForCurrentProcess()->HasSwitch(switches::kKioskMode);
      if (!is_kiosk && !fullscreen_exit_bubble_.get()) {
        fullscreen_exit_bubble_.reset(new FullscreenExitBubbleGtk(
            GTK_FLOATING_CONTAINER(render_area_floating_container_),
            browser(),
            GURL(),
            fullscreen_exit_bubble_type_));
      }
      gtk_widget_hide(titlebar_widget());
      gtk_widget_hide(toolbar_border_);
    } else {
      fullscreen_exit_bubble_type_ =
          FEB_TYPE_BROWSER_FULLSCREEN_EXIT_INSTRUCTION;
      gtk_widget_show(titlebar_widget());
      fullscreen_exit_bubble_.reset();
      UpdateCustomFrame();
      ShowSupportedWindowFeatures();
    }
  }

  if (event->changed_mask & GDK_WINDOW_STATE_MAXIMIZED) {
    content::NotificationService::current()->Notify(
        chrome::NOTIFICATION_BROWSER_WINDOW_MAXIMIZED,
        content::Source<BrowserWindow>(this),
        content::NotificationService::NoDetails());
  }

  titlebar_->UpdateCustomFrame(UseCustomFrame() && !IsFullscreen());
  UpdateWindowShape(bounds_.width(), bounds_.height());
  SaveWindowPosition();
  return FALSE;
}

// Callback for the delete event.  This event is fired when the user tries to
// close the window (e.g., clicking on the X in the window manager title bar).
gboolean BrowserWindowGtk::OnMainWindowDeleteEvent(GtkWidget* widget,
                                                   GdkEvent* event) {
  Close();

  // Return true to prevent the gtk window from being destroyed.  Close will
  // destroy it for us.
  return TRUE;
}

void BrowserWindowGtk::OnMainWindowDestroy(GtkWidget* widget) {
  // Make sure we destroy this object while the main window is still valid.
  extension_keybinding_registry_.reset();

  // BUG 8712. When we gtk_widget_destroy() in Close(), this will emit the
  // signal right away, and we will be here (while Close() is still in the
  // call stack).  In order to not reenter Close(), and to also follow the
  // expectations of BrowserList, we should run the BrowserWindowGtk destructor
  // not now, but after the run loop goes back to process messages.  Otherwise
  // we will remove ourself from BrowserList while it's being iterated.
  // Additionally, now that we know the window is gone, we need to make sure to
  // set window_ to NULL, otherwise we will try to close the window again when
  // we call Close() in the destructor.
  //
  // We don't want to use DeleteSoon() here since it won't work on a nested pump
  // (like in UI tests).
  MessageLoop::current()->PostTask(
      FROM_HERE, base::Bind(&base::DeletePointer<BrowserWindowGtk>, this));
}

void BrowserWindowGtk::UnMaximize() {
  gtk_window_util::UnMaximize(window_, bounds_, restored_bounds_);
}

bool BrowserWindowGtk::CanClose() const {
  // You cannot close a frame for which there is an active originating drag
  // session.
  if (tabstrip_->IsDragSessionActive())
    return false;

  // Give beforeunload handlers the chance to cancel the close before we hide
  // the window below.
  if (!browser_->ShouldCloseWindow())
    return false;

  if (!browser_->tab_strip_model()->empty()) {
    // Tab strip isn't empty.  Hide the window (so it appears to have closed
    // immediately) and close all the tabs, allowing the renderers to shut
    // down. When the tab strip is empty we'll be called back again.
    gtk_widget_hide(GTK_WIDGET(window_));
    browser_->OnWindowClosing();
    return false;
  }

  // Empty TabStripModel, it's now safe to allow the Window to be closed.
  content::NotificationService::current()->Notify(
      chrome::NOTIFICATION_WINDOW_CLOSED,
      content::Source<GtkWindow>(window_),
      content::NotificationService::NoDetails());
  return true;
}

bool BrowserWindowGtk::ShouldShowWindowIcon() const {
  return browser_->SupportsWindowFeature(Browser::FEATURE_TITLEBAR);
}

void BrowserWindowGtk::AddFindBar(FindBarGtk* findbar) {
  gtk_floating_container_add_floating(
      GTK_FLOATING_CONTAINER(render_area_floating_container_),
      findbar->widget());
}

void BrowserWindowGtk::ResetCustomFrameCursor() {
  if (!frame_cursor_)
    return;

  frame_cursor_ = NULL;
  gdk_window_set_cursor(gtk_widget_get_window(GTK_WIDGET(window_)), NULL);
}

// static
BrowserWindowGtk* BrowserWindowGtk::GetBrowserWindowForNativeWindow(
    gfx::NativeWindow window) {
  if (window) {
    return static_cast<BrowserWindowGtk*>(
        g_object_get_qdata(G_OBJECT(window), GetBrowserWindowQuarkKey()));
  }

  return NULL;
}

// static
GtkWindow* BrowserWindowGtk::GetBrowserWindowForXID(XID xid) {
  GtkWindow* window = ui::GetGtkWindowFromX11Window(xid);
  // Use GetBrowserWindowForNativeWindow() to verify the GtkWindow we found
  // is actually a browser window (and not e.g. a dialog).
  if (!GetBrowserWindowForNativeWindow(window))
    return NULL;
  return window;
}

GtkWidget* BrowserWindowGtk::titlebar_widget() const {
  return titlebar_->widget();
}

// static
void BrowserWindowGtk::RegisterUserPrefs(PrefRegistrySyncable* registry) {
  bool custom_frame_default = false;
  // Avoid checking the window manager if we're not connected to an X server (as
  // is the case in Valgrind tests).
  if (ui::XDisplayExists())
    custom_frame_default = GetCustomFramePrefDefault();

  registry->RegisterBooleanPref(prefs::kUseCustomChromeFrame,
                                custom_frame_default,
                                PrefRegistrySyncable::UNSYNCABLE_PREF);
}

WebContents* BrowserWindowGtk::GetDisplayedTab() {
  return contents_container_->GetVisibleTab();
}

void BrowserWindowGtk::QueueToolbarRedraw() {
  gtk_widget_queue_draw(toolbar_->widget());
}

void BrowserWindowGtk::SetGeometryHints() {
  // If we call gtk_window_maximize followed by gtk_window_present, compiz gets
  // confused and maximizes the window, but doesn't set the
  // GDK_WINDOW_STATE_MAXIMIZED bit.  So instead, we keep track of whether to
  // maximize and call it after gtk_window_present.
  gfx::Rect bounds;
  chrome::GetSavedWindowBoundsAndShowState(browser_.get(),
                                           &bounds,
                                           &show_state_after_show_);
  // We don't blindly call SetBounds here: that sets a forced position
  // on the window and we intentionally *don't* do that for normal
  // windows.  Most programs do not restore their window position on
  // Linux, instead letting the window manager choose a position.
  //
  // However, in cases like dropping a tab where the bounds are
  // specifically set, we do want to position explicitly.  We also
  // force the position as part of session restore, as applications
  // that restore other, similar state (for instance GIMP, audacity,
  // pidgin, dia, and gkrellm) do tend to restore their positions.
  //
  // For popup windows, we assume that if x == y == 0, the opening page
  // did not specify a position.  Let the WM position the popup instead.
  bool is_popup = browser_->is_type_popup();
  bool popup_without_position = is_popup &&
      bounds.x() == 0 && bounds.y() == 0;
  bool move = browser_->bounds_overridden() && !popup_without_position;
  SetBoundsImpl(bounds, !is_popup, move);
}

void BrowserWindowGtk::ConnectHandlersToSignals() {
  g_signal_connect(window_, "delete-event",
                   G_CALLBACK(OnMainWindowDeleteEventThunk), this);
  g_signal_connect(window_, "destroy",
                   G_CALLBACK(OnMainWindowDestroyThunk), this);
  g_signal_connect(window_, "configure-event",
                   G_CALLBACK(OnConfigureThunk), this);
  g_signal_connect(window_, "window-state-event",
                   G_CALLBACK(OnWindowStateThunk), this);
  g_signal_connect(window_, "key-press-event",
                   G_CALLBACK(OnKeyPressThunk), this);
  g_signal_connect(window_, "motion-notify-event",
                   G_CALLBACK(OnMouseMoveEventThunk), this);
  g_signal_connect(window_, "button-press-event",
                   G_CALLBACK(OnButtonPressEventThunk), this);
  g_signal_connect(window_, "focus-in-event",
                   G_CALLBACK(OnFocusInThunk), this);
  g_signal_connect(window_, "focus-out-event",
                   G_CALLBACK(OnFocusOutThunk), this);
}

void BrowserWindowGtk::InitWidgets() {
  ConnectHandlersToSignals();

  bounds_ = configure_bounds_ = restored_bounds_ =
      GetInitialWindowBounds(window_);

  // This vbox encompasses all of the widgets within the browser.  This is
  // everything except the custom frame border.
  window_vbox_ = gtk_vbox_new(FALSE, 0);
  gtk_widget_show(window_vbox_);

  // We hold an always hidden GtkMenuBar inside our browser window simply to
  // fool the Unity desktop, which will mirror the contents of the first
  // GtkMenuBar it sees into the global menu bar. (It doesn't seem to check the
  // visibility of the GtkMenuBar, so we can just permanently hide it.)
  global_menu_bar_.reset(new GlobalMenuBar(browser_.get()));
  gtk_container_add(GTK_CONTAINER(window_vbox_), global_menu_bar_->widget());

  // The window container draws the custom browser frame.
  window_container_ = gtk_alignment_new(0.0, 0.0, 1.0, 1.0);
  gtk_widget_set_name(window_container_, "chrome-custom-frame-border");
  gtk_widget_set_app_paintable(window_container_, TRUE);
  gtk_widget_set_double_buffered(window_container_, FALSE);
  gtk_widget_set_redraw_on_allocate(window_container_, TRUE);
  g_signal_connect(window_container_, "expose-event",
                   G_CALLBACK(OnCustomFrameExposeThunk), this);
  gtk_container_add(GTK_CONTAINER(window_container_), window_vbox_);

  tabstrip_.reset(new TabStripGtk(browser_->tab_strip_model(), this));
  tabstrip_->Init();

  // Build the titlebar (tabstrip + header space + min/max/close buttons).
  titlebar_.reset(new BrowserTitlebar(this, window_));
  titlebar_->Init();

  // Insert the tabstrip into the window.
  gtk_box_pack_start(GTK_BOX(window_vbox_), titlebar_->widget(), FALSE, FALSE,
                     0);

  toolbar_.reset(new BrowserToolbarGtk(browser_.get(), this));
  toolbar_->Init(window_);
  gtk_box_pack_start(GTK_BOX(window_vbox_), toolbar_->widget(),
                     FALSE, FALSE, 0);
  g_signal_connect_after(toolbar_->widget(), "expose-event",
                         G_CALLBACK(OnExposeDrawInfobarBitsThunk), this);
  // This vbox surrounds the render area: find bar, info bars and render view.
  // The reason is that this area as a whole needs to be grouped in its own
  // GdkWindow hierarchy so that animations originating inside it (infobar,
  // download shelf, find bar) are all clipped to that area. This is why
  // |render_area_vbox_| is packed in |render_area_event_box_|.
  render_area_vbox_ = gtk_vbox_new(FALSE, 0);
  gtk_widget_set_name(render_area_vbox_, "chrome-render-area-vbox");
  render_area_floating_container_ = gtk_floating_container_new();
  gtk_container_add(GTK_CONTAINER(render_area_floating_container_),
                    render_area_vbox_);

  GtkWidget* location_icon = toolbar_->GetLocationBarView()->
      location_icon_widget();
  g_signal_connect(location_icon, "size-allocate",
                   G_CALLBACK(OnLocationIconSizeAllocateThunk), this);
  g_signal_connect_after(location_icon, "expose-event",
                         G_CALLBACK(OnExposeDrawInfobarBitsThunk), this);

  toolbar_border_ = gtk_event_box_new();
  gtk_box_pack_start(GTK_BOX(render_area_vbox_),
                     toolbar_border_, FALSE, FALSE, 0);
  gtk_widget_set_size_request(toolbar_border_, -1, 1);
  gtk_widget_set_no_show_all(toolbar_border_, TRUE);
  g_signal_connect_after(toolbar_border_, "expose-event",
                         G_CALLBACK(OnExposeDrawInfobarBitsThunk), this);

  if (IsToolbarSupported())
    gtk_widget_show(toolbar_border_);

  infobar_container_.reset(
      new InfoBarContainerGtk(this,
                              browser_->search_model(),
                              browser_->profile()));
  gtk_box_pack_start(GTK_BOX(render_area_vbox_),
                     infobar_container_->widget(),
                     FALSE, FALSE, 0);

  status_bubble_.reset(new StatusBubbleGtk(browser_->profile()));

  contents_container_.reset(new TabContentsContainerGtk(status_bubble_.get()));
  devtools_container_.reset(new TabContentsContainerGtk(NULL));
  ViewIDUtil::SetID(devtools_container_->widget(), VIEW_ID_DEV_TOOLS_DOCKED);

  contents_hsplit_ = gtk_hpaned_new();
  gtk_paned_pack1(GTK_PANED(contents_hsplit_), contents_container_->widget(),
                  TRUE, TRUE);
  contents_vsplit_ = gtk_vpaned_new();
  gtk_paned_pack1(GTK_PANED(contents_vsplit_), contents_hsplit_, TRUE, TRUE);

  gtk_box_pack_end(GTK_BOX(render_area_vbox_),
                   contents_vsplit_, TRUE, TRUE, 0);

  gtk_widget_show_all(render_area_floating_container_);
  render_area_event_box_ = gtk_event_box_new();
  // Set a white background so during startup the user sees white in the
  // content area before we get a WebContents in place.
  gtk_widget_modify_bg(render_area_event_box_, GTK_STATE_NORMAL,
                       &ui::kGdkWhite);
  gtk_container_add(GTK_CONTAINER(render_area_event_box_),
                    render_area_floating_container_);
  gtk_widget_show(render_area_event_box_);
  gtk_box_pack_end(GTK_BOX(window_vbox_), render_area_event_box_,
                   TRUE, TRUE, 0);

  instant_overlay_controller_.reset(
      new InstantOverlayControllerGtk(this, contents_container_.get()));

  if (IsBookmarkBarSupported()) {
    bookmark_bar_.reset(new BookmarkBarGtk(this,
                                           browser_.get(),
                                           tabstrip_.get()));
    PlaceBookmarkBar(false);
    gtk_widget_show(bookmark_bar_->widget());

    g_signal_connect_after(bookmark_bar_->widget(), "expose-event",
                           G_CALLBACK(OnBookmarkBarExposeThunk), this);
    g_signal_connect(bookmark_bar_->widget(), "size-allocate",
                     G_CALLBACK(OnBookmarkBarSizeAllocateThunk), this);
  }

  // We have to realize the window before we try to apply a window shape mask.
  gtk_widget_realize(GTK_WIDGET(window_));
  state_ = gdk_window_get_state(gtk_widget_get_window(GTK_WIDGET(window_)));
  // Note that calling this the first time is necessary to get the
  // proper control layout.
  UpdateCustomFrame();

  // Add the keybinding registry, now that the window has been realized.
  extension_keybinding_registry_.reset(new ExtensionKeybindingRegistryGtk(
      browser_->profile(),
      window_,
      extensions::ExtensionKeybindingRegistry::ALL_EXTENSIONS,
      this));

  // We have to call this after the first window is created, but after that only
  // when the theme changes. This sets the icon that will be used for windows
  // that have not explicitly been assigned an icon.
  static bool default_icon_set = false;
  if (!default_icon_set) {
    gtk_util::SetDefaultWindowIcon(window_);
    default_icon_set = true;
  }
  // Set this window's (potentially profile-avatar-emblemed) icon, overriding
  // the default.
  gtk_util::SetWindowIcon(window_, browser_->profile());

  gtk_container_add(GTK_CONTAINER(window_), window_container_);
  gtk_widget_show(window_container_);
  browser_->tab_strip_model()->AddObserver(this);
}

void BrowserWindowGtk::SetBackgroundColor() {
  Profile* profile = browser()->profile();
  GtkThemeService* theme_provider = GtkThemeService::GetFrom(profile);
  int frame_color_id;
  if (UsingCustomPopupFrame()) {
    frame_color_id = ThemeProperties::COLOR_TOOLBAR;
  } else if (DrawFrameAsActive()) {
    frame_color_id = browser()->profile()->IsOffTheRecord()
       ? ThemeProperties::COLOR_FRAME_INCOGNITO
       : ThemeProperties::COLOR_FRAME;
  } else {
    frame_color_id = browser()->profile()->IsOffTheRecord()
       ? ThemeProperties::COLOR_FRAME_INCOGNITO_INACTIVE
       : ThemeProperties::COLOR_FRAME_INACTIVE;
  }

  SkColor frame_color = theme_provider->GetColor(frame_color_id);

  // Paint the frame color on the left, right and bottom.
  GdkColor frame_color_gdk = gfx::SkColorToGdkColor(frame_color);
  gtk_widget_modify_bg(GTK_WIDGET(window_), GTK_STATE_NORMAL,
                       &frame_color_gdk);

  // Set the color of the dev tools divider.
  gtk_widget_modify_bg(contents_vsplit_, GTK_STATE_NORMAL, &frame_color_gdk);
  gtk_widget_modify_bg(contents_hsplit_, GTK_STATE_NORMAL, &frame_color_gdk);

  // When the cursor is over the divider, GTK+ normally lightens the background
  // color by 1.3 (see LIGHTNESS_MULT in gtkstyle.c).  Since we're setting the
  // color, override the prelight also.
  color_utils::HSL hsl = { -1, 0.5, 0.65 };
  SkColor frame_prelight_color = color_utils::HSLShift(frame_color, hsl);
  GdkColor frame_prelight_color_gdk =
      gfx::SkColorToGdkColor(frame_prelight_color);
  gtk_widget_modify_bg(contents_hsplit_, GTK_STATE_PRELIGHT,
      &frame_prelight_color_gdk);
  gtk_widget_modify_bg(contents_vsplit_, GTK_STATE_PRELIGHT,
      &frame_prelight_color_gdk);

  GdkColor border_color = theme_provider->GetBorderColor();
  gtk_widget_modify_bg(toolbar_border_, GTK_STATE_NORMAL, &border_color);
}

void BrowserWindowGtk::UpdateWindowShape(int width, int height) {
  using gtk_window_util::kFrameBorderThickness;
  GdkRegion* mask = GetWindowShape(width, height);
  gdk_window_shape_combine_region(
      gtk_widget_get_window(GTK_WIDGET(window_)), mask, 0, 0);
  if (mask)
    gdk_region_destroy(mask);

  if (UseCustomFrame() && !IsFullscreen() && !IsMaximized()) {
    gtk_alignment_set_padding(GTK_ALIGNMENT(window_container_), 1,
        kFrameBorderThickness, kFrameBorderThickness, kFrameBorderThickness);
  } else {
    gtk_alignment_set_padding(GTK_ALIGNMENT(window_container_), 0, 0, 0, 0);
  }
}

GdkRegion* BrowserWindowGtk::GetWindowShape(int width, int height) const {
  if (UseCustomFrame() && !IsFullscreen() && !IsMaximized()) {
    // Make the corners rounded.  We set a mask that includes most of the
    // window except for a few pixels in each corner.
    GdkRectangle top_top_rect = { 3, 0, width - 6, 1 };
    GdkRectangle top_mid_rect = { 1, 1, width - 2, 2 };
    GdkRectangle mid_rect = { 0, 3, width, height - 6 };
    // The bottom two rects are mirror images of the top two rects.
    GdkRectangle bot_mid_rect = top_mid_rect;
    bot_mid_rect.y = height - 3;
    GdkRectangle bot_bot_rect = top_top_rect;
    bot_bot_rect.y = height - 1;
    GdkRegion* mask = gdk_region_rectangle(&top_top_rect);
    gdk_region_union_with_rect(mask, &top_mid_rect);
    gdk_region_union_with_rect(mask, &mid_rect);
    gdk_region_union_with_rect(mask, &bot_mid_rect);
    gdk_region_union_with_rect(mask, &bot_bot_rect);
    return mask;
  } else if (UseCustomFrame()) {
    // Disable rounded corners.  Simply passing in a NULL region doesn't
    // seem to work on KWin, so manually set the shape to the whole window.
    GdkRectangle rect = { 0, 0, width, height };
    GdkRegion* mask = gdk_region_rectangle(&rect);
    return mask;
  } else {
    // XFCE disables the system decorations if there's an xshape set. Do not
    // use the KWin hack when the custom frame is not enabled.
    return NULL;
  }
}

void BrowserWindowGtk::ConnectAccelerators() {
  accel_group_ = gtk_accel_group_new();
  gtk_window_add_accel_group(window_, accel_group_);

  AcceleratorsGtk* accelerators = AcceleratorsGtk::GetInstance();
  for (AcceleratorsGtk::const_iterator iter = accelerators->begin();
       iter != accelerators->end(); ++iter) {
    gtk_accel_group_connect(
        accel_group_,
        ui::GetGdkKeyCodeForAccelerator(iter->second),
        ui::GetGdkModifierForAccelerator(iter->second),
        GtkAccelFlags(0),
        g_cclosure_new(G_CALLBACK(OnGtkAccelerator),
                       GINT_TO_POINTER(iter->first), NULL));
  }
}

void BrowserWindowGtk::UpdateCustomFrame() {
  gtk_window_set_decorated(window_, !UseCustomFrame());
  titlebar_->UpdateCustomFrame(UseCustomFrame() && !IsFullscreen());
  UpdateWindowShape(bounds_.width(), bounds_.height());
}

void BrowserWindowGtk::InvalidateWindow() {
  GtkAllocation allocation;
  gtk_widget_get_allocation(GTK_WIDGET(window_), &allocation);
  gdk_window_invalidate_rect(gtk_widget_get_window(GTK_WIDGET(window_)),
                             &allocation, TRUE);
}

void BrowserWindowGtk::SaveWindowPosition() {
  // Browser::SaveWindowPlacement is used for session restore.
  ui::WindowShowState show_state = ui::SHOW_STATE_NORMAL;
  if (IsMaximized())
    show_state = ui::SHOW_STATE_MAXIMIZED;
  else if (IsMinimized())
    show_state = ui::SHOW_STATE_MINIMIZED;

  if (chrome::ShouldSaveWindowPlacement(browser_.get()))
    chrome::SaveWindowPlacement(browser_.get(), restored_bounds_, show_state);

  // We also need to save the placement for startup.
  // This is a web of calls between views and delegates on Windows, but the
  // crux of the logic follows.  See also cocoa/browser_window_controller.mm.
  if (!browser_->profile()->GetPrefs())
    return;

  std::string window_name = chrome::GetWindowPlacementKey(browser_.get());
  DictionaryPrefUpdate update(browser_->profile()->GetPrefs(),
                              window_name.c_str());
  DictionaryValue* window_preferences = update.Get();
  // Note that we store left/top for consistency with Windows, but that we
  // *don't* obey them; we only use them for computing width/height.  See
  // comments in SetGeometryHints().
  window_preferences->SetInteger("left", restored_bounds_.x());
  window_preferences->SetInteger("top", restored_bounds_.y());
  window_preferences->SetInteger("right", restored_bounds_.right());
  window_preferences->SetInteger("bottom", restored_bounds_.bottom());
  window_preferences->SetBoolean("maximized", IsMaximized());

  gfx::Rect work_area(gfx::Screen::GetNativeScreen()->GetDisplayMatching(
      restored_bounds_).work_area());
  window_preferences->SetInteger("work_area_left", work_area.x());
  window_preferences->SetInteger("work_area_top", work_area.y());
  window_preferences->SetInteger("work_area_right", work_area.right());
  window_preferences->SetInteger("work_area_bottom", work_area.bottom());
}

void BrowserWindowGtk::InvalidateInfoBarBits() {
  gtk_widget_queue_draw(toolbar_border_);
  gtk_widget_queue_draw(toolbar_->widget());
  if (bookmark_bar_.get() &&
      browser_->bookmark_bar_state() != BookmarkBar::DETACHED) {
    gtk_widget_queue_draw(bookmark_bar_->widget());
  }
}

int BrowserWindowGtk::GetXPositionOfLocationIcon(GtkWidget* relative_to) {
  GtkWidget* location_icon = toolbar_->GetLocationBarView()->
      location_icon_widget();

  GtkAllocation location_icon_allocation;
  gtk_widget_get_allocation(location_icon, &location_icon_allocation);

  int x = 0;
  gtk_widget_translate_coordinates(
      location_icon, relative_to,
      (location_icon_allocation.width + 1) / 2,
      0, &x, NULL);

  if (!gtk_widget_get_has_window(relative_to)) {
    GtkAllocation allocation;
    gtk_widget_get_allocation(relative_to, &allocation);
    x += allocation.x;
  }

  return x;
}

void BrowserWindowGtk::MaybeShowBookmarkBar(bool animate) {
  TRACE_EVENT0("ui::gtk", "BrowserWindowGtk::MaybeShowBookmarkBar");
  if (!IsBookmarkBarSupported())
    return;

  if (GetDisplayedTab())
    bookmark_bar_->SetPageNavigator(browser_.get());

  BookmarkBar::State state = browser_->bookmark_bar_state();
  if (contents_container_->HasOverlay() && state == BookmarkBar::DETACHED)
    state = BookmarkBar::HIDDEN;

  toolbar_->UpdateForBookmarkBarVisibility(state == BookmarkBar::DETACHED);
  PlaceBookmarkBar(state == BookmarkBar::DETACHED);
  bookmark_bar_->SetBookmarkBarState(
      state,
      animate ? BookmarkBar::ANIMATE_STATE_CHANGE :
                BookmarkBar::DONT_ANIMATE_STATE_CHANGE);
}

void BrowserWindowGtk::OnLocationIconSizeAllocate(GtkWidget* sender,
                                                  GtkAllocation* allocation) {
  // The position of the arrow may have changed, so we'll have to redraw it.
  InvalidateInfoBarBits();
}

gboolean BrowserWindowGtk::OnExposeDrawInfobarBits(GtkWidget* sender,
                                                   GdkEventExpose* expose) {
  TRACE_EVENT0("ui::gtk", "BrowserWindowGtk::OnExposeDrawInfobarBits");
  // Maybe draw infobars
  infobar_container_->PaintInfobarBitsOn(sender, expose, NULL);

  return FALSE;
}

gboolean BrowserWindowGtk::OnBookmarkBarExpose(GtkWidget* sender,
                                               GdkEventExpose* expose) {
  if (browser_->bookmark_bar_state() == BookmarkBar::DETACHED)
    return FALSE;

  return OnExposeDrawInfobarBits(sender, expose);
}

void BrowserWindowGtk::OnBookmarkBarSizeAllocate(GtkWidget* sender,
                                                 GtkAllocation* allocation) {
  TRACE_EVENT0("ui::gtk", "BrowserWindowGtk::OnBookmarkBarSizeAllocate");
  // The size of the bookmark bar affects how the infobar arrow is drawn on
  // the toolbar.
  if (infobar_container_->ContainsInfobars())
    InvalidateInfoBarBits();

  // Pass the new size to our infobar container.
  int arrow_size = InfoBar::kDefaultArrowTargetHeight;
  if (browser_->bookmark_bar_state() != BookmarkBar::DETACHED)
    arrow_size += allocation->height;
  infobar_container_->SetMaxTopArrowHeight(arrow_size);
}

// static
gboolean BrowserWindowGtk::OnGtkAccelerator(GtkAccelGroup* accel_group,
                                            GObject* acceleratable,
                                            guint keyval,
                                            GdkModifierType modifier,
                                            void* user_data) {
  int command_id = GPOINTER_TO_INT(user_data);
  BrowserWindowGtk* browser_window =
      GetBrowserWindowForNativeWindow(GTK_WINDOW(acceleratable));
  DCHECK(browser_window != NULL);
  return chrome::ExecuteCommand(browser_window->browser(), command_id);
}

// Let the focused widget have first crack at the key event so we don't
// override their accelerators, except if there is a priority keybinding
// handler registered (it should take precedence).
gboolean BrowserWindowGtk::OnKeyPress(GtkWidget* widget, GdkEventKey* event) {
  if (extension_keybinding_registry_->HasPriorityHandler(event))
    return FALSE;

  // If a widget besides the native view is focused, we have to try to handle
  // the custom accelerators before letting it handle them.
  WebContents* current_web_contents =
      browser()->tab_strip_model()->GetActiveWebContents();
  // The current tab might not have a render view if it crashed.
  if (!current_web_contents ||
      !current_web_contents->GetView()->GetContentNativeView() ||
      !gtk_widget_is_focus(
          current_web_contents->GetView()->GetContentNativeView())) {
    int command_id = GetCustomCommandId(event);
    if (command_id == -1)
      command_id = GetPreHandleCommandId(event);

    if (command_id != -1 && chrome::ExecuteCommand(browser_.get(), command_id))
      return TRUE;

    // Propagate the key event to child widget first, so we don't override their
    // accelerators.
    if (!gtk_window_propagate_key_event(GTK_WINDOW(widget), event)) {
      if (!gtk_window_activate_key(GTK_WINDOW(widget), event)) {
        gtk_bindings_activate_event(GTK_OBJECT(widget), event);
      }
    }
  } else {
    bool rv = gtk_window_propagate_key_event(GTK_WINDOW(widget), event);
    DCHECK(rv);
  }

  // Prevents the default handler from handling this event.
  return TRUE;
}

gboolean BrowserWindowGtk::OnMouseMoveEvent(GtkWidget* widget,
                                            GdkEventMotion* event) {
  // This method is used to update the mouse cursor when over the edge of the
  // custom frame.  If the custom frame is off or we're over some other widget,
  // do nothing.
  if (!UseCustomFrame() || event->window != gtk_widget_get_window(widget)) {
    // Reset the cursor.
    if (frame_cursor_) {
      frame_cursor_ = NULL;
      gdk_window_set_cursor(gtk_widget_get_window(GTK_WIDGET(window_)), NULL);
    }
    return FALSE;
  }

  // Update the cursor if we're on the custom frame border.
  GdkWindowEdge edge;
  bool has_hit_edge = GetWindowEdge(static_cast<int>(event->x),
                                    static_cast<int>(event->y), &edge);
  GdkCursorType new_cursor = GDK_LAST_CURSOR;
  if (has_hit_edge)
    new_cursor = gtk_window_util::GdkWindowEdgeToGdkCursorType(edge);

  GdkCursorType last_cursor = GDK_LAST_CURSOR;
  if (frame_cursor_)
    last_cursor = frame_cursor_->type;

  if (last_cursor != new_cursor) {
    if (has_hit_edge) {
      frame_cursor_ = gfx::GetCursor(new_cursor);
    } else {
      frame_cursor_ = NULL;
    }
    gdk_window_set_cursor(gtk_widget_get_window(GTK_WIDGET(window_)),
                          frame_cursor_);
  }
  return FALSE;
}

gboolean BrowserWindowGtk::OnButtonPressEvent(GtkWidget* widget,
                                              GdkEventButton* event) {
  // Handle back/forward.
  if (event->type == GDK_BUTTON_PRESS) {
    if (event->button == 8) {
      chrome::GoBack(browser_.get(), CURRENT_TAB);
      return TRUE;
    } else if (event->button == 9) {
      chrome::GoForward(browser_.get(), CURRENT_TAB);
      return TRUE;
    }
  }

  // Handle left, middle and right clicks.  In particular, we care about clicks
  // in the custom frame border and clicks in the titlebar.

  // Make the button press coordinate relative to the browser window.
  int win_x, win_y;
  GdkWindow* gdk_window = gtk_widget_get_window(GTK_WIDGET(window_));
  gdk_window_get_origin(gdk_window, &win_x, &win_y);

  GdkWindowEdge edge;
  gfx::Point point(static_cast<int>(event->x_root - win_x),
                   static_cast<int>(event->y_root - win_y));
  bool has_hit_edge = GetWindowEdge(point.x(), point.y(), &edge);

  // Ignore clicks that are in/below the browser toolbar.
  GtkWidget* toolbar = toolbar_->widget();
  if (!gtk_widget_get_visible(toolbar)) {
    // If the toolbar is not showing, use the location of web contents as the
    // boundary of where to ignore clicks.
    toolbar = render_area_vbox_;
  }
  gint toolbar_y;
  gtk_widget_get_pointer(toolbar, NULL, &toolbar_y);
  bool has_hit_titlebar = !IsFullscreen() && (toolbar_y < 0)
                          && !has_hit_edge;
  if (event->button == 1) {
    if (GDK_BUTTON_PRESS == event->type) {
      // Raise the window after a click on either the titlebar or the border to
      // match the behavior of most window managers, unless that behavior has
      // been suppressed.
      if ((has_hit_titlebar || has_hit_edge) && !suppress_window_raise_)
        gdk_window_raise(gdk_window);

      if (has_hit_titlebar) {
        return gtk_window_util::HandleTitleBarLeftMousePress(
            window_, bounds_, event);
      } else if (has_hit_edge) {
        gtk_window_begin_resize_drag(window_, edge, event->button,
                                     static_cast<gint>(event->x_root),
                                     static_cast<gint>(event->y_root),
                                     event->time);
        return TRUE;
      }
    } else if (GDK_2BUTTON_PRESS == event->type) {
      if (has_hit_titlebar) {
        // Maximize/restore on double click.
        if (IsMaximized()) {
          UnMaximize();
        } else {
          gtk_window_maximize(window_);
        }
        return TRUE;
      }
    }
  } else if (event->button == 2) {
    if (has_hit_titlebar || has_hit_edge) {
      gdk_window_lower(gdk_window);
    }
    return TRUE;
  } else if (event->button == 3) {
    if (has_hit_titlebar) {
      titlebar_->ShowContextMenu(event);
      return TRUE;
    }
  }

  return FALSE;  // Continue to propagate the event.
}

gboolean BrowserWindowGtk::OnFocusIn(GtkWidget* widget,
                                     GdkEventFocus* event) {
  BrowserList::SetLastActive(browser_.get());
  return FALSE;
}

gboolean BrowserWindowGtk::OnFocusOut(GtkWidget* widget,
                                      GdkEventFocus* event) {
  return FALSE;
}

void BrowserWindowGtk::ShowSupportedWindowFeatures() {
  if (IsTabStripSupported())
    tabstrip_->Show();

  if (IsToolbarSupported()) {
    toolbar_->Show();
    gtk_widget_show(toolbar_border_);
    gdk_window_lower(gtk_widget_get_window(toolbar_border_));
  }

  if (IsBookmarkBarSupported())
    MaybeShowBookmarkBar(false);
}

void BrowserWindowGtk::HideUnsupportedWindowFeatures() {
  if (!IsTabStripSupported())
    tabstrip_->Hide();

  if (!IsToolbarSupported())
    toolbar_->Hide();

  // If the bookmark bar shelf is unsupported, then we never create it.
}

bool BrowserWindowGtk::IsTabStripSupported() const {
  return browser_->SupportsWindowFeature(Browser::FEATURE_TABSTRIP);
}

bool BrowserWindowGtk::IsToolbarSupported() const {
  return browser_->SupportsWindowFeature(Browser::FEATURE_TOOLBAR) ||
         browser_->SupportsWindowFeature(Browser::FEATURE_LOCATIONBAR);
}

bool BrowserWindowGtk::IsBookmarkBarSupported() const {
  return browser_->SupportsWindowFeature(Browser::FEATURE_BOOKMARKBAR);
}

bool BrowserWindowGtk::UsingCustomPopupFrame() const {
  GtkThemeService* theme_provider = GtkThemeService::GetFrom(
      browser()->profile());
  return !theme_provider->UsingNativeTheme() && browser()->is_type_popup();
}

bool BrowserWindowGtk::GetWindowEdge(int x, int y, GdkWindowEdge* edge) {
  if (!UseCustomFrame())
    return false;

  if (IsMaximized() || IsFullscreen())
    return false;

  return gtk_window_util::GetWindowEdge(
      bounds_.size(), kTopResizeAdjust, x, y, edge);
}

bool BrowserWindowGtk::UseCustomFrame() const {
  // We don't use the custom frame for app mode windows or app window popups.
  return use_custom_frame_pref_.GetValue() && !browser_->is_app();
}

void BrowserWindowGtk::PlaceBookmarkBar(bool is_floating) {
  TRACE_EVENT0("ui::gtk", "BrowserWindowGtk::PlaceBookmarkBar");

  GtkWidget* target_parent = NULL;
  if (!is_floating) {
    // Place the bookmark bar at the end of |window_vbox_|; this happens after
    // we have placed the render area at the end of |window_vbox_| so we will
    // be above the render area.
    target_parent = window_vbox_;
  } else {
    // Place the bookmark bar at the end of the render area; this happens after
    // the tab contents container has been placed there so we will be
    // above the webpage (in terms of y).
    target_parent = render_area_vbox_;
  }

  GtkWidget* parent = gtk_widget_get_parent(bookmark_bar_->widget());
  if (parent != target_parent) {
    if (parent)
      gtk_container_remove(GTK_CONTAINER(parent), bookmark_bar_->widget());

    gtk_box_pack_end(GTK_BOX(target_parent), bookmark_bar_->widget(),
                     FALSE, FALSE, 0);
  }
}

bool BrowserWindowGtk::DrawFrameAsActive() const {
  if (ui::ActiveWindowWatcherX::WMSupportsActivation())
    return is_active_;

  // Since we don't get notifications when the active state of the frame
  // changes, we can't consistently repaint the frame at the right time. Instead
  // we always draw the frame as active.
  return true;
}

void BrowserWindowGtk::UpdateDevToolsForContents(WebContents* contents) {
  TRACE_EVENT0("ui::gtk", "BrowserWindowGtk::UpdateDevToolsForContents");
  DevToolsWindow* new_devtools_window = contents ?
      DevToolsWindow::GetDockedInstanceForInspectedTab(contents) : NULL;

  // Fast return in case of the same window having same orientation.
  if (devtools_window_ == new_devtools_window && (!new_devtools_window ||
        new_devtools_window->dock_side() == devtools_dock_side_)) {
    if (new_devtools_window)
      UpdateDevToolsSplitPosition();
    return;
  }

  // Replace tab contents.
  if (devtools_window_ != new_devtools_window) {
    if (devtools_window_)
      devtools_container_->DetachTab(devtools_window_->web_contents());
    devtools_container_->SetTab(
        new_devtools_window ? new_devtools_window->web_contents() : NULL);
    if (new_devtools_window) {
      // WebContentsViewGtk::WasShown is not called when a web contents is shown
      // by anything other than user selecting a Tab.
      // See TabContentsViewViews::OnWindowPosChanged for reference on how it
      // should be implemented.
      new_devtools_window->web_contents()->WasShown();
    }
  }

  // Store last used position.
  if (devtools_window_) {
    GtkAllocation contents_rect;
    gtk_widget_get_allocation(contents_vsplit_, &contents_rect);
    int split_size;
    if (devtools_dock_side_ == DEVTOOLS_DOCK_SIDE_RIGHT) {
      gtk_widget_style_get(contents_hsplit_, "handle-size", &split_size, NULL);
      devtools_window_->SetWidth(
          contents_rect.width - split_size -
          gtk_paned_get_position(GTK_PANED(contents_hsplit_)));
    } else if (devtools_dock_side_ == DEVTOOLS_DOCK_SIDE_BOTTOM) {
      gtk_widget_style_get(contents_vsplit_, "handle-size", &split_size, NULL);
      devtools_window_->SetHeight(
          contents_rect.height - split_size -
          gtk_paned_get_position(GTK_PANED(contents_vsplit_)));
    }
  }

  // Show / hide container if necessary. Changing dock orientation is
  // hide + show.
  bool should_hide = devtools_window_ && (!new_devtools_window ||
      devtools_dock_side_ != new_devtools_window->dock_side());
  bool should_show = new_devtools_window && (!devtools_window_ || should_hide);

  if (should_hide)
    HideDevToolsContainer();

  devtools_window_ = new_devtools_window;

  if (should_show) {
    devtools_dock_side_ = new_devtools_window->dock_side();
    ShowDevToolsContainer();
  } else if (new_devtools_window) {
    UpdateDevToolsSplitPosition();
  }
}

void BrowserWindowGtk::ShowDevToolsContainer() {
  if (devtools_dock_side_ == DEVTOOLS_DOCK_SIDE_MINIMIZED) {
    gtk_box_pack_end(GTK_BOX(render_area_vbox_),
                     devtools_container_->widget(), FALSE, FALSE, 0);
    gtk_box_reorder_child(GTK_BOX(render_area_vbox_),
                          devtools_container_->widget(), 0);
  } else {
    gtk_widget_set_size_request(devtools_container_->widget(),
        devtools_window_->GetMinimumWidth(),
        devtools_window_->GetMinimumHeight());
    bool to_right = devtools_dock_side_ == DEVTOOLS_DOCK_SIDE_RIGHT;
    gtk_paned_pack2(GTK_PANED(to_right ? contents_hsplit_ : contents_vsplit_),
                    devtools_container_->widget(),
                    FALSE,
                    FALSE);
  }
  UpdateDevToolsSplitPosition();
  gtk_widget_show(devtools_container_->widget());
}

void BrowserWindowGtk::HideDevToolsContainer() {
  gtk_container_remove(GTK_CONTAINER(
          devtools_dock_side_ == DEVTOOLS_DOCK_SIDE_RIGHT ? contents_hsplit_ :
          devtools_dock_side_ == DEVTOOLS_DOCK_SIDE_BOTTOM ? contents_vsplit_ :
          render_area_vbox_),
      devtools_container_->widget());
  gtk_widget_hide(devtools_container_->widget());
}

void BrowserWindowGtk::UpdateDevToolsSplitPosition() {
  if (!window_has_shown_)
    return;

  // This is required if infobar appears/disappears, or devtools container is
  // moved between |render_area_vbox_| and |contents_{v,h}split_|.
  gtk_container_check_resize(GTK_CONTAINER(render_area_vbox_));

  GtkAllocation contents_rect;
  gtk_widget_get_allocation(contents_vsplit_, &contents_rect);
  int split_size;

  if (devtools_window_->dock_side() == DEVTOOLS_DOCK_SIDE_RIGHT) {
    gtk_widget_style_get(contents_hsplit_, "handle-size", &split_size, NULL);
    int split_offset = contents_rect.width -
        devtools_window_->GetWidth(contents_rect.width) - split_size;
    gtk_paned_set_position(GTK_PANED(contents_hsplit_), split_offset);
  } else if (devtools_window_->dock_side() == DEVTOOLS_DOCK_SIDE_BOTTOM) {
    gtk_widget_style_get(contents_vsplit_, "handle-size", &split_size, NULL);
    int split_offset = contents_rect.height -
        devtools_window_->GetHeight(contents_rect.height) - split_size;
    gtk_paned_set_position(GTK_PANED(contents_vsplit_), split_offset);
  } else {
    gtk_widget_set_size_request(devtools_container_->widget(),
        0, devtools_window_->GetMinimizedHeight());
  }
}

void BrowserWindowGtk::OnUseCustomChromeFrameChanged() {
  UpdateCustomFrame();
  ui::SetHideTitlebarWhenMaximizedProperty(
      ui::GetX11WindowFromGtkWidget(GTK_WIDGET(window_)),
      UseCustomFrame() ? ui::HIDE_TITLEBAR_WHEN_MAXIMIZED :
                         ui::SHOW_TITLEBAR_WHEN_MAXIMIZED);
}

// static
bool BrowserWindowGtk::GetCustomFramePrefDefault() {
  // Ideally, we'd use the custom frame by default and just fall back on using
  // system decorations for the few (?) tiling window managers where the custom
  // frame doesn't make sense (e.g. awesome, ion3, ratpoison, xmonad, etc.) or
  // other WMs where it has issues (e.g. Fluxbox -- see issue 19130).  The EWMH
  // _NET_SUPPORTING_WM property makes it easy to look up a name for the current
  // WM, but at least some of the WMs in the latter group don't set it.
  // Instead, we default to using system decorations for all WMs and
  // special-case the ones where the custom frame should be used.
  ui::WindowManagerName wm_type = ui::GuessWindowManager();
  return (wm_type == ui::WM_BLACKBOX ||
          wm_type == ui::WM_COMPIZ ||
          wm_type == ui::WM_ENLIGHTENMENT ||
          wm_type == ui::WM_METACITY ||
          wm_type == ui::WM_MUFFIN ||
          wm_type == ui::WM_MUTTER ||
          wm_type == ui::WM_OPENBOX ||
          wm_type == ui::WM_XFWM4);
}

// static
BrowserWindow* BrowserWindow::CreateBrowserWindow(Browser* browser) {
  BrowserWindowGtk* browser_window_gtk = new BrowserWindowGtk(browser);
  browser_window_gtk->Init();
  return browser_window_gtk;
}