ash/display/display_controller.cc

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This source file includes following definitions.
GetDisplayManager
SetDisplayPropertiesOnHost
active_
Store
Restore
SetThrottleTimeout
IsThrottled
mirror_window_controller_
Start
Shutdown
InitPrimaryDisplay
InitSecondaryDisplays
AddObserver
RemoveObserver
GetPrimaryDisplayId
GetPrimaryRootWindow
GetRootWindowForDisplayId
CloseChildWindows
GetAllRootWindows
GetOverscanInsets
SetOverscanInsets
GetAllRootWindowControllers
ToggleMirrorMode
SwapPrimaryDisplay
SetPrimaryDisplayId
SetPrimaryDisplay
EnsurePointerInDisplays
UpdateWorkAreaOfDisplayNearestWindow
OnDisplayBoundsChanged
OnDisplayAdded
OnDisplayRemoved
OnHostResized
CreateOrUpdateNonDesktopDisplay
CloseNonDesktopDisplay
PreDisplayConfigurationChange
PostDisplayConfigurationChange
AddWindowTreeHostForDisplay
OnFadeOutForSwapDisplayFinished
UpdateHostWindowNames
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ash/display/display_controller.h"

#include <algorithm>
#include <cmath>
#include <map>

#include "ash/ash_switches.h"
#include "ash/display/cursor_window_controller.h"
#include "ash/display/display_layout_store.h"
#include "ash/display/display_manager.h"
#include "ash/display/mirror_window_controller.h"
#include "ash/display/root_window_transformers.h"
#include "ash/display/virtual_keyboard_window_controller.h"
#include "ash/host/window_tree_host_factory.h"
#include "ash/root_window_controller.h"
#include "ash/root_window_settings.h"
#include "ash/screen_util.h"
#include "ash/shell.h"
#include "ash/shell_delegate.h"
#include "ash/wm/coordinate_conversion.h"
#include "base/command_line.h"
#include "base/strings/stringprintf.h"
#include "ui/aura/client/capture_client.h"
#include "ui/aura/client/focus_client.h"
#include "ui/aura/client/screen_position_client.h"
#include "ui/aura/root_window_transformer.h"
#include "ui/aura/window.h"
#include "ui/aura/window_event_dispatcher.h"
#include "ui/aura/window_property.h"
#include "ui/aura/window_tracker.h"
#include "ui/compositor/compositor.h"
#include "ui/compositor/compositor_vsync_manager.h"
#include "ui/gfx/display.h"
#include "ui/gfx/screen.h"
#include "ui/wm/public/activation_client.h"

#if defined(OS_CHROMEOS)
#include "ash/display/output_configurator_animation.h"
#include "base/sys_info.h"
#include "base/time/time.h"
#if defined(USE_X11)
#include "ui/base/x/x11_util.h"
#include "ui/gfx/x/x11_types.h"

// Including this at the bottom to avoid other
// potential conflict with chrome headers.
#include <X11/extensions/Xrandr.h>
#undef RootWindow
#endif  // defined(USE_X11)
#endif  // defined(OS_CHROMEOS)

namespace ash {
namespace {

// Primary display stored in global object as it can be
// accessed after Shell is deleted. A separate display instance is created
// during the shutdown instead of always keeping two display instances
// (one here and another one in display_manager) in sync, which is error prone.
int64 primary_display_id = gfx::Display::kInvalidDisplayID;

// Specifies how long the display change should have been disabled
// after each display change operations.
// |kCycleDisplayThrottleTimeoutMs| is set to be longer to avoid
// changing the settings while the system is still configurating
// displays. It will be overriden by |kAfterDisplayChangeThrottleTimeoutMs|
// when the display change happens, so the actual timeout is much shorter.
const int64 kAfterDisplayChangeThrottleTimeoutMs = 500;
const int64 kCycleDisplayThrottleTimeoutMs = 4000;
const int64 kSwapDisplayThrottleTimeoutMs = 500;

DisplayManager* GetDisplayManager() {
  return Shell::GetInstance()->display_manager();
}

void SetDisplayPropertiesOnHost(aura::WindowTreeHost* host,
                                const gfx::Display& display) {
  DisplayInfo info = GetDisplayManager()->GetDisplayInfo(display.id());
#if defined(OS_CHROMEOS) && defined(USE_X11)
  // Native window property (Atom in X11) that specifies the display's
  // rotation, scale factor and if it's internal display.  They are
  // read and used by touchpad/mouse driver directly on X (contact
  // adlr@ for more details on touchpad/mouse driver side). The value
  // of the rotation is one of 0 (normal), 1 (90 degrees clockwise), 2
  // (180 degree) or 3 (270 degrees clockwise).  The value of the
  // scale factor is in percent (100, 140, 200 etc).
  const char kRotationProp[] = "_CHROME_DISPLAY_ROTATION";
  const char kScaleFactorProp[] = "_CHROME_DISPLAY_SCALE_FACTOR";
  const char kInternalProp[] = "_CHROME_DISPLAY_INTERNAL";
  const char kCARDINAL[] = "CARDINAL";
  int xrandr_rotation = RR_Rotate_0;
  switch (info.rotation()) {
    case gfx::Display::ROTATE_0:
      xrandr_rotation = RR_Rotate_0;
      break;
    case gfx::Display::ROTATE_90:
      xrandr_rotation = RR_Rotate_90;
      break;
    case gfx::Display::ROTATE_180:
      xrandr_rotation = RR_Rotate_180;
      break;
    case gfx::Display::ROTATE_270:
      xrandr_rotation = RR_Rotate_270;
      break;
  }

  int internal = display.IsInternal() ? 1 : 0;
  gfx::AcceleratedWidget xwindow = host->GetAcceleratedWidget();
  ui::SetIntProperty(xwindow, kInternalProp, kCARDINAL, internal);
  ui::SetIntProperty(xwindow, kRotationProp, kCARDINAL, xrandr_rotation);
  ui::SetIntProperty(xwindow,
                     kScaleFactorProp,
                     kCARDINAL,
                     100 * display.device_scale_factor());
#endif
  scoped_ptr<aura::RootWindowTransformer> transformer(
      CreateRootWindowTransformerForDisplay(host->window(), display));
  host->SetRootWindowTransformer(transformer.Pass());

  DisplayMode mode;
  if (GetDisplayManager()->GetSelectedModeForDisplayId(display.id(), &mode) &&
      mode.refresh_rate > 0.0f) {
    host->compositor()->vsync_manager()->SetAuthoritativeVSyncInterval(
        base::TimeDelta::FromMicroseconds(
            base::Time::kMicrosecondsPerSecond / mode.refresh_rate));
  }
}

}  // namespace

// A utility class to store/restore focused/active window
// when the display configuration has changed.
class FocusActivationStore {
 public:
  FocusActivationStore()
      : activation_client_(NULL),
        capture_client_(NULL),
        focus_client_(NULL),
        focused_(NULL),
        active_(NULL) {
  }

  void Store(bool clear_focus) {
    if (!activation_client_) {
      aura::Window* root = Shell::GetPrimaryRootWindow();
      activation_client_ = aura::client::GetActivationClient(root);
      capture_client_ = aura::client::GetCaptureClient(root);
      focus_client_ = aura::client::GetFocusClient(root);
    }
    focused_ = focus_client_->GetFocusedWindow();
    if (focused_)
      tracker_.Add(focused_);
    active_ = activation_client_->GetActiveWindow();
    if (active_ && focused_ != active_)
      tracker_.Add(active_);

    // Deactivate the window to close menu / bubble windows.
    if (clear_focus)
      activation_client_->DeactivateWindow(active_);

    // Release capture if any.
    capture_client_->SetCapture(NULL);
    // Clear the focused window if any. This is necessary because a
    // window may be deleted when losing focus (fullscreen flash for
    // example).  If the focused window is still alive after move, it'll
    // be re-focused below.
    if (clear_focus)
      focus_client_->FocusWindow(NULL);
  }

  void Restore() {
    // Restore focused or active window if it's still alive.
    if (focused_ && tracker_.Contains(focused_)) {
      focus_client_->FocusWindow(focused_);
    } else if (active_ && tracker_.Contains(active_)) {
      activation_client_->ActivateWindow(active_);
    }
    if (focused_)
      tracker_.Remove(focused_);
    if (active_)
      tracker_.Remove(active_);
    focused_ = NULL;
    active_ = NULL;
  }

 private:
  aura::client::ActivationClient* activation_client_;
  aura::client::CaptureClient* capture_client_;
  aura::client::FocusClient* focus_client_;
  aura::WindowTracker tracker_;
  aura::Window* focused_;
  aura::Window* active_;

  DISALLOW_COPY_AND_ASSIGN(FocusActivationStore);
};

////////////////////////////////////////////////////////////////////////////////
// DisplayChangeLimiter

DisplayController::DisplayChangeLimiter::DisplayChangeLimiter()
    : throttle_timeout_(base::Time::Now()) {
}

void DisplayController::DisplayChangeLimiter::SetThrottleTimeout(
    int64 throttle_ms) {
  throttle_timeout_ =
      base::Time::Now() + base::TimeDelta::FromMilliseconds(throttle_ms);
}

bool DisplayController::DisplayChangeLimiter::IsThrottled() const {
  return base::Time::Now() < throttle_timeout_;
}

////////////////////////////////////////////////////////////////////////////////
// DisplayController

DisplayController::DisplayController()
    : primary_root_window_for_replace_(NULL),
      focus_activation_store_(new FocusActivationStore()),
      cursor_window_controller_(new CursorWindowController()),
      mirror_window_controller_(new MirrorWindowController()) {
#if defined(OS_CHROMEOS)
  if (base::SysInfo::IsRunningOnChromeOS())
    limiter_.reset(new DisplayChangeLimiter);
#endif
  // Reset primary display to make sure that tests don't use
  // stale display info from previous tests.
  primary_display_id = gfx::Display::kInvalidDisplayID;
}

DisplayController::~DisplayController() {
}

void DisplayController::Start() {
  // Created here so that Shell has finished being created. Adds itself
  // as a ShellObserver.
  virtual_keyboard_window_controller_.reset(
      new VirtualKeyboardWindowController);
  Shell::GetScreen()->AddObserver(this);
  Shell::GetInstance()->display_manager()->set_delegate(this);

  FOR_EACH_OBSERVER(Observer, observers_, OnDisplaysInitialized());
}

void DisplayController::Shutdown() {
  // Unset the display manager's delegate here because
  // DisplayManager outlives DisplayController.
  Shell::GetInstance()->display_manager()->set_delegate(NULL);

  cursor_window_controller_.reset();
  mirror_window_controller_.reset();
  virtual_keyboard_window_controller_.reset();

  Shell::GetScreen()->RemoveObserver(this);
  // Delete all root window controllers, which deletes root window
  // from the last so that the primary root window gets deleted last.
  for (std::map<int64, aura::Window*>::const_reverse_iterator it =
           root_windows_.rbegin(); it != root_windows_.rend(); ++it) {
    RootWindowController* controller = GetRootWindowController(it->second);
    DCHECK(controller);
    delete controller;
  }
}

void DisplayController::InitPrimaryDisplay() {
  const gfx::Display& primary_candidate =
      GetDisplayManager()->GetPrimaryDisplayCandidate();
  primary_display_id = primary_candidate.id();
  AddWindowTreeHostForDisplay(primary_candidate);
}

void DisplayController::InitSecondaryDisplays() {
  DisplayManager* display_manager = GetDisplayManager();
  for (size_t i = 0; i < display_manager->GetNumDisplays(); ++i) {
    const gfx::Display& display = display_manager->GetDisplayAt(i);
    if (primary_display_id != display.id()) {
      aura::WindowTreeHost* host = AddWindowTreeHostForDisplay(display);
      RootWindowController::CreateForSecondaryDisplay(host);
    }
  }
  UpdateHostWindowNames();
}

void DisplayController::AddObserver(Observer* observer) {
  observers_.AddObserver(observer);
}

void DisplayController::RemoveObserver(Observer* observer) {
  observers_.RemoveObserver(observer);
}

// static
int64 DisplayController::GetPrimaryDisplayId() {
  return primary_display_id;
}

aura::Window* DisplayController::GetPrimaryRootWindow() {
  DCHECK(!root_windows_.empty());
  return root_windows_[primary_display_id];
}

aura::Window* DisplayController::GetRootWindowForDisplayId(int64 id) {
  return root_windows_[id];
}

void DisplayController::CloseChildWindows() {
  for (std::map<int64, aura::Window*>::const_iterator it =
           root_windows_.begin(); it != root_windows_.end(); ++it) {
    aura::Window* root_window = it->second;
    RootWindowController* controller = GetRootWindowController(root_window);
    if (controller) {
      controller->CloseChildWindows();
    } else {
      while (!root_window->children().empty()) {
        aura::Window* child = root_window->children()[0];
        delete child;
      }
    }
  }
}

aura::Window::Windows DisplayController::GetAllRootWindows() {
  aura::Window::Windows windows;
  for (std::map<int64, aura::Window*>::const_iterator it =
           root_windows_.begin(); it != root_windows_.end(); ++it) {
    DCHECK(it->second);
    if (GetRootWindowController(it->second))
      windows.push_back(it->second);
  }
  return windows;
}

gfx::Insets DisplayController::GetOverscanInsets(int64 display_id) const {
  return GetDisplayManager()->GetOverscanInsets(display_id);
}

void DisplayController::SetOverscanInsets(int64 display_id,
                                          const gfx::Insets& insets_in_dip) {
  GetDisplayManager()->SetOverscanInsets(display_id, insets_in_dip);
}

std::vector<RootWindowController*>
DisplayController::GetAllRootWindowControllers() {
  std::vector<RootWindowController*> controllers;
  for (std::map<int64, aura::Window*>::const_iterator it =
           root_windows_.begin(); it != root_windows_.end(); ++it) {
    RootWindowController* controller = GetRootWindowController(it->second);
    if (controller)
      controllers.push_back(controller);
  }
  return controllers;
}

void DisplayController::ToggleMirrorMode() {
  DisplayManager* display_manager = GetDisplayManager();
  if (display_manager->num_connected_displays() <= 1)
    return;

  if (limiter_) {
    if  (limiter_->IsThrottled())
      return;
    limiter_->SetThrottleTimeout(kCycleDisplayThrottleTimeoutMs);
  }
#if defined(OS_CHROMEOS)
  Shell* shell = Shell::GetInstance();
  OutputConfiguratorAnimation* animation =
      shell->output_configurator_animation();
  animation->StartFadeOutAnimation(
      base::Bind(base::IgnoreResult(&DisplayManager::SetMirrorMode),
                 base::Unretained(display_manager),
                 !display_manager->IsMirrored()));
#endif
}

void DisplayController::SwapPrimaryDisplay() {
  if (limiter_) {
    if  (limiter_->IsThrottled())
      return;
    limiter_->SetThrottleTimeout(kSwapDisplayThrottleTimeoutMs);
  }

  if (Shell::GetScreen()->GetNumDisplays() > 1) {
#if defined(OS_CHROMEOS)
    OutputConfiguratorAnimation* animation =
        Shell::GetInstance()->output_configurator_animation();
    if (animation) {
      animation->StartFadeOutAnimation(base::Bind(
          &DisplayController::OnFadeOutForSwapDisplayFinished,
          base::Unretained(this)));
    } else {
      SetPrimaryDisplay(ScreenUtil::GetSecondaryDisplay());
    }
#else
    SetPrimaryDisplay(ScreenUtil::GetSecondaryDisplay());
#endif
  }
}

void DisplayController::SetPrimaryDisplayId(int64 id) {
  DCHECK_NE(gfx::Display::kInvalidDisplayID, id);
  if (id == gfx::Display::kInvalidDisplayID || primary_display_id == id)
    return;

  const gfx::Display& display = GetDisplayManager()->GetDisplayForId(id);
  if (display.is_valid())
    SetPrimaryDisplay(display);
}

void DisplayController::SetPrimaryDisplay(
    const gfx::Display& new_primary_display) {
  DisplayManager* display_manager = GetDisplayManager();
  DCHECK(new_primary_display.is_valid());
  DCHECK(display_manager->IsActiveDisplay(new_primary_display));

  if (!new_primary_display.is_valid() ||
      !display_manager->IsActiveDisplay(new_primary_display)) {
    LOG(ERROR) << "Invalid or non-existent display is requested:"
               << new_primary_display.ToString();
    return;
  }

  if (primary_display_id == new_primary_display.id() ||
      root_windows_.size() < 2) {
    return;
  }

  aura::Window* non_primary_root = root_windows_[new_primary_display.id()];
  LOG_IF(ERROR, !non_primary_root)
      << "Unknown display is requested in SetPrimaryDisplay: id="
      << new_primary_display.id();
  if (!non_primary_root)
    return;

  gfx::Display old_primary_display = Shell::GetScreen()->GetPrimaryDisplay();

  // Swap root windows between current and new primary display.
  aura::Window* primary_root = root_windows_[primary_display_id];
  DCHECK(primary_root);
  DCHECK_NE(primary_root, non_primary_root);

  root_windows_[new_primary_display.id()] = primary_root;
  GetRootWindowSettings(primary_root)->display_id = new_primary_display.id();

  root_windows_[old_primary_display.id()] = non_primary_root;
  GetRootWindowSettings(non_primary_root)->display_id =
      old_primary_display.id();

  primary_display_id = new_primary_display.id();
  GetDisplayManager()->layout_store()->UpdatePrimaryDisplayId(
      display_manager->GetCurrentDisplayIdPair(), primary_display_id);

  UpdateWorkAreaOfDisplayNearestWindow(
      primary_root, old_primary_display.GetWorkAreaInsets());
  UpdateWorkAreaOfDisplayNearestWindow(
      non_primary_root, new_primary_display.GetWorkAreaInsets());

  // Update the dispay manager with new display info.
  std::vector<DisplayInfo> display_info_list;
  display_info_list.push_back(display_manager->GetDisplayInfo(
      primary_display_id));
  display_info_list.push_back(display_manager->GetDisplayInfo(
      ScreenUtil::GetSecondaryDisplay().id()));
  GetDisplayManager()->set_force_bounds_changed(true);
  GetDisplayManager()->UpdateDisplays(display_info_list);
  GetDisplayManager()->set_force_bounds_changed(false);
}

void DisplayController::EnsurePointerInDisplays() {
  // If the mouse is currently on a display in native location,
  // use the same native location. Otherwise find the display closest
  // to the current cursor location in screen coordinates.

  gfx::Point point_in_screen = Shell::GetScreen()->GetCursorScreenPoint();
  gfx::Point target_location_in_native;
  int64 closest_distance_squared = -1;
  DisplayManager* display_manager = GetDisplayManager();

  aura::Window* dst_root_window = NULL;
  for (size_t i = 0; i < display_manager->GetNumDisplays(); ++i) {
    const gfx::Display& display = display_manager->GetDisplayAt(i);
    const DisplayInfo display_info =
        display_manager->GetDisplayInfo(display.id());
    aura::Window* root_window = GetRootWindowForDisplayId(display.id());
    if (display_info.bounds_in_native().Contains(
            cursor_location_in_native_coords_for_restore_)) {
      dst_root_window = root_window;
      target_location_in_native = cursor_location_in_native_coords_for_restore_;
      break;
    }
    gfx::Point center = display.bounds().CenterPoint();
    // Use the distance squared from the center of the dislay. This is not
    // exactly "closest" display, but good enough to pick one
    // appropriate (and there are at most two displays).
    // We don't care about actual distance, only relative to other displays, so
    // using the LengthSquared() is cheaper than Length().

    int64 distance_squared = (center - point_in_screen).LengthSquared();
    if (closest_distance_squared < 0 ||
        closest_distance_squared > distance_squared) {
      aura::Window* root_window = GetRootWindowForDisplayId(display.id());
      aura::client::ScreenPositionClient* client =
          aura::client::GetScreenPositionClient(root_window);
      client->ConvertPointFromScreen(root_window, &center);
      root_window->GetHost()->ConvertPointToNativeScreen(&center);
      dst_root_window = root_window;
      target_location_in_native = center;
      closest_distance_squared = distance_squared;
    }
  }
  dst_root_window->GetHost()->ConvertPointFromNativeScreen(
      &target_location_in_native);
  dst_root_window->MoveCursorTo(target_location_in_native);
}

bool DisplayController::UpdateWorkAreaOfDisplayNearestWindow(
    const aura::Window* window,
    const gfx::Insets& insets) {
  const aura::Window* root_window = window->GetRootWindow();
  int64 id = GetRootWindowSettings(root_window)->display_id;
  // if id is |kInvaildDisplayID|, it's being deleted.
  DCHECK(id != gfx::Display::kInvalidDisplayID);
  return GetDisplayManager()->UpdateWorkAreaOfDisplay(id, insets);
}

void DisplayController::OnDisplayBoundsChanged(const gfx::Display& display) {
  const DisplayInfo& display_info =
      GetDisplayManager()->GetDisplayInfo(display.id());
  DCHECK(!display_info.bounds_in_native().IsEmpty());
  aura::WindowTreeHost* host = root_windows_[display.id()]->GetHost();
  host->SetBounds(display_info.bounds_in_native());
  SetDisplayPropertiesOnHost(host, display);
}

void DisplayController::OnDisplayAdded(const gfx::Display& display) {
  if (primary_root_window_for_replace_) {
    DCHECK(root_windows_.empty());
    primary_display_id = display.id();
    root_windows_[display.id()] = primary_root_window_for_replace_;
    GetRootWindowSettings(primary_root_window_for_replace_)->display_id =
        display.id();
    primary_root_window_for_replace_ = NULL;
    const DisplayInfo& display_info =
        GetDisplayManager()->GetDisplayInfo(display.id());
    aura::WindowTreeHost* host = root_windows_[display.id()]->GetHost();
    host->SetBounds(display_info.bounds_in_native());
    SetDisplayPropertiesOnHost(host, display);
  } else {
    if (primary_display_id == gfx::Display::kInvalidDisplayID)
      primary_display_id = display.id();
    DCHECK(!root_windows_.empty());
    aura::WindowTreeHost* host = AddWindowTreeHostForDisplay(display);
    RootWindowController::CreateForSecondaryDisplay(host);
  }
}

void DisplayController::OnDisplayRemoved(const gfx::Display& display) {
  aura::Window* root_to_delete = root_windows_[display.id()];
  DCHECK(root_to_delete) << display.ToString();

  // Display for root window will be deleted when the Primary RootWindow
  // is deleted by the Shell.
  root_windows_.erase(display.id());

  // When the primary root window's display is removed, move the primary
  // root to the other display.
  if (primary_display_id == display.id()) {
    // Temporarily store the primary root window in
    // |primary_root_window_for_replace_| when replacing the display.
    if (root_windows_.size() == 0) {
      primary_display_id = gfx::Display::kInvalidDisplayID;
      primary_root_window_for_replace_ = root_to_delete;
      return;
    }
    DCHECK_EQ(1U, root_windows_.size());
    primary_display_id = ScreenUtil::GetSecondaryDisplay().id();
    aura::Window* primary_root = root_to_delete;

    // Delete the other root instead.
    root_to_delete = root_windows_[primary_display_id];
    GetRootWindowSettings(root_to_delete)->display_id = display.id();

    // Setup primary root.
    root_windows_[primary_display_id] = primary_root;
    GetRootWindowSettings(primary_root)->display_id = primary_display_id;

    OnDisplayBoundsChanged(
        GetDisplayManager()->GetDisplayForId(primary_display_id));
  }
  RootWindowController* controller = GetRootWindowController(root_to_delete);
  DCHECK(controller);
  controller->MoveWindowsTo(GetPrimaryRootWindow());
  // Delete most of root window related objects, but don't delete
  // root window itself yet because the stack may be using it.
  controller->Shutdown();
  base::MessageLoop::current()->DeleteSoon(FROM_HERE, controller);
}

void DisplayController::OnHostResized(const aura::WindowTreeHost* host) {
  gfx::Display display = Shell::GetScreen()->GetDisplayNearestWindow(
      const_cast<aura::Window*>(host->window()));

  DisplayManager* display_manager = GetDisplayManager();
  if (display_manager->UpdateDisplayBounds(display.id(), host->GetBounds())) {
    mirror_window_controller_->UpdateWindow();
    cursor_window_controller_->UpdateContainer();
  }
}

void DisplayController::CreateOrUpdateNonDesktopDisplay(
    const DisplayInfo& info) {
  switch (GetDisplayManager()->second_display_mode()) {
    case DisplayManager::MIRRORING:
      mirror_window_controller_->UpdateWindow(info);
      cursor_window_controller_->UpdateContainer();
      virtual_keyboard_window_controller_->Close();
      break;
    case DisplayManager::VIRTUAL_KEYBOARD:
      mirror_window_controller_->Close();
      cursor_window_controller_->UpdateContainer();
      virtual_keyboard_window_controller_->UpdateWindow(info);
      break;
    case DisplayManager::EXTENDED:
      NOTREACHED();
  }
}

void DisplayController::CloseNonDesktopDisplay() {
  mirror_window_controller_->Close();
  cursor_window_controller_->UpdateContainer();
  virtual_keyboard_window_controller_->Close();
}

void DisplayController::PreDisplayConfigurationChange(bool clear_focus) {
  FOR_EACH_OBSERVER(Observer, observers_, OnDisplayConfigurationChanging());
  focus_activation_store_->Store(clear_focus);
  gfx::Screen* screen = Shell::GetScreen();
  gfx::Point point_in_screen = screen->GetCursorScreenPoint();
  gfx::Display display = screen->GetDisplayNearestPoint(point_in_screen);
  aura::Window* root_window = GetRootWindowForDisplayId(display.id());

  aura::client::ScreenPositionClient* client =
      aura::client::GetScreenPositionClient(root_window);
  client->ConvertPointFromScreen(root_window, &point_in_screen);
  root_window->GetHost()->ConvertPointToNativeScreen(&point_in_screen);
  cursor_location_in_native_coords_for_restore_ = point_in_screen;
}

void DisplayController::PostDisplayConfigurationChange() {
  if (limiter_)
    limiter_->SetThrottleTimeout(kAfterDisplayChangeThrottleTimeoutMs);

  focus_activation_store_->Restore();

  DisplayManager* display_manager = GetDisplayManager();
  DisplayLayoutStore* layout_store = display_manager->layout_store();
  if (display_manager->num_connected_displays() > 1) {
    DisplayIdPair pair = display_manager->GetCurrentDisplayIdPair();
    layout_store->UpdateMirrorStatus(pair, display_manager->IsMirrored());
    DisplayLayout layout = layout_store->GetRegisteredDisplayLayout(pair);

    if (Shell::GetScreen()->GetNumDisplays() > 1 ) {
      int64 primary_id = layout.primary_id;
      SetPrimaryDisplayId(
          primary_id == gfx::Display::kInvalidDisplayID ?
          pair.first : primary_id);
      // Update the primary_id in case the above call is
      // ignored. Happens when a) default layout's primary id
      // doesn't exist, or b) the primary_id has already been
      // set to the same and didn't update it.
      layout_store->UpdatePrimaryDisplayId(
          pair, Shell::GetScreen()->GetPrimaryDisplay().id());
    }
  }
  FOR_EACH_OBSERVER(Observer, observers_, OnDisplayConfigurationChanged());
  UpdateHostWindowNames();
  EnsurePointerInDisplays();
}

aura::WindowTreeHost* DisplayController::AddWindowTreeHostForDisplay(
    const gfx::Display& display) {
  static int host_count = 0;
  const DisplayInfo& display_info =
      GetDisplayManager()->GetDisplayInfo(display.id());
  const gfx::Rect& bounds_in_native = display_info.bounds_in_native();
  aura::WindowTreeHost* host =
      Shell::GetInstance()->window_tree_host_factory()->CreateWindowTreeHost(
          bounds_in_native);
  host->window()->SetName(base::StringPrintf("RootWindow-%d", host_count++));
  host->compositor()->SetBackgroundColor(SK_ColorBLACK);
  // No need to remove our observer observer because the DisplayController
  // outlives the host.
  host->AddObserver(this);
  InitRootWindowSettings(host->window())->display_id = display.id();
  host->InitHost();

  root_windows_[display.id()] = host->window();
  SetDisplayPropertiesOnHost(host, display);

#if defined(OS_CHROMEOS)
  static bool force_constrain_pointer_to_root =
      CommandLine::ForCurrentProcess()->HasSwitch(
          switches::kAshConstrainPointerToRoot);
  if (base::SysInfo::IsRunningOnChromeOS() || force_constrain_pointer_to_root)
    host->ConfineCursorToRootWindow();
#endif
  return host;
}

void DisplayController::OnFadeOutForSwapDisplayFinished() {
#if defined(OS_CHROMEOS)
  SetPrimaryDisplay(ScreenUtil::GetSecondaryDisplay());
  Shell::GetInstance()->output_configurator_animation()->StartFadeInAnimation();
#endif
}

void DisplayController::UpdateHostWindowNames() {
#if defined(USE_X11)
  // crbug.com/120229 - set the window title for the primary dislpay
  // to "aura_root_0" so gtalk can find the primary root window to broadcast.
  // TODO(jhorwich) Remove this once Chrome supports window-based broadcasting.
  aura::Window* primary = Shell::GetPrimaryRootWindow();
  aura::Window::Windows root_windows = Shell::GetAllRootWindows();
  for (size_t i = 0; i < root_windows.size(); ++i) {
    std::string name =
        root_windows[i] == primary ? "aura_root_0" : "aura_root_x";
    gfx::AcceleratedWidget xwindow =
        root_windows[i]->GetHost()->GetAcceleratedWidget();
    XStoreName(gfx::GetXDisplay(), xwindow, name.c_str());
  }
#endif
}

}  // namespace ash
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root/ash/display/display_controller.cc

DEFINITIONS
