src/ash/display/display_controller.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ash/display/display_controller.h"
   6
   7 #include <algorithm>
   8 #include <cmath>
   9 #include <map>
  10
  11 #include "ash/ash_switches.h"
  12 #include "ash/display/cursor_window_controller.h"
  13 #include "ash/display/display_layout_store.h"
  14 #include "ash/display/display_manager.h"
  15 #include "ash/display/mirror_window_controller.h"
  16 #include "ash/display/root_window_transformers.h"
  17 #include "ash/display/virtual_keyboard_window_controller.h"
  18 #include "ash/host/ash_window_tree_host.h"
  19 #include "ash/host/ash_window_tree_host_init_params.h"
  20 #include "ash/host/root_window_transformer.h"
  21 #include "ash/root_window_controller.h"
  22 #include "ash/root_window_settings.h"
  23 #include "ash/screen_util.h"
  24 #include "ash/shell.h"
  25 #include "ash/shell_delegate.h"
  26 #include "ash/wm/coordinate_conversion.h"
  27 #include "base/command_line.h"
  28 #include "base/strings/stringprintf.h"
  29 #include "base/strings/utf_string_conversions.h"
  30 #include "ui/aura/client/capture_client.h"
  31 #include "ui/aura/client/focus_client.h"
  32 #include "ui/aura/client/screen_position_client.h"
  33 #include "ui/aura/window.h"
  34 #include "ui/aura/window_event_dispatcher.h"
  35 #include "ui/aura/window_property.h"
  36 #include "ui/aura/window_tracker.h"
  37 #include "ui/aura/window_tree_host.h"
  38 #include "ui/compositor/compositor.h"
  39 #include "ui/compositor/compositor_vsync_manager.h"
  40 #include "ui/gfx/display.h"
  41 #include "ui/gfx/screen.h"
  42 #include "ui/wm/public/activation_client.h"
  43
  44 #if defined(OS_CHROMEOS)
  45 #include "ash/display/display_configurator_animation.h"
  46 #include "base/sys_info.h"
  47 #include "base/time/time.h"
  48 #endif  // defined(OS_CHROMEOS)
  49
  50 #if defined(USE_X11)
  51 #include "ui/base/x/x11_util.h"
  52 #include "ui/gfx/x/x11_types.h"
  53
  54 // Including this at the bottom to avoid other
  55 // potential conflict with chrome headers.
  56 #include <X11/extensions/Xrandr.h>
  57 #undef RootWindow
  58 #endif  // defined(USE_X11)
  59
  60
  61 namespace ash {
  62 namespace {
  63
  64 // Primary display stored in global object as it can be
  65 // accessed after Shell is deleted. A separate display instance is created
  66 // during the shutdown instead of always keeping two display instances
  67 // (one here and another one in display_manager) in sync, which is error prone.
  68 // This is initialized in the constructor, and then in CreatePrimaryHost().
  69 int64 primary_display_id = -1;
  70
  71 // Specifies how long the display change should have been disabled
  72 // after each display change operations.
  73 // |kCycleDisplayThrottleTimeoutMs| is set to be longer to avoid
  74 // changing the settings while the system is still configurating
  75 // displays. It will be overriden by |kAfterDisplayChangeThrottleTimeoutMs|
  76 // when the display change happens, so the actual timeout is much shorter.
  77 const int64 kAfterDisplayChangeThrottleTimeoutMs = 500;
  78 const int64 kCycleDisplayThrottleTimeoutMs = 4000;
  79 const int64 kSwapDisplayThrottleTimeoutMs = 500;
  80
  81 DisplayManager* GetDisplayManager() {
  82   return Shell::GetInstance()->display_manager();
  83 }
  84
  85 void SetDisplayPropertiesOnHost(AshWindowTreeHost* ash_host,
  86                                 const gfx::Display& display) {
  87   DisplayInfo info = GetDisplayManager()->GetDisplayInfo(display.id());
  88   aura::WindowTreeHost* host = ash_host->AsWindowTreeHost();
  89 #if defined(OS_CHROMEOS) && defined(USE_X11)
  90   // Native window property (Atom in X11) that specifies the display's
  91   // rotation, scale factor and if it's internal display.  They are
  92   // read and used by touchpad/mouse driver directly on X (contact
  93   // adlr@ for more details on touchpad/mouse driver side). The value
  94   // of the rotation is one of 0 (normal), 1 (90 degrees clockwise), 2
  95   // (180 degree) or 3 (270 degrees clockwise).  The value of the
  96   // scale factor is in percent (100, 140, 200 etc).
  97   const char kRotationProp[] = "_CHROME_DISPLAY_ROTATION";
  98   const char kScaleFactorProp[] = "_CHROME_DISPLAY_SCALE_FACTOR";
  99   const char kInternalProp[] = "_CHROME_DISPLAY_INTERNAL";
 100   const char kCARDINAL[] = "CARDINAL";
 101   int xrandr_rotation = RR_Rotate_0;
 102   switch (info.rotation()) {
 103     case gfx::Display::ROTATE_0:
 104       xrandr_rotation = RR_Rotate_0;
 105       break;
 106     case gfx::Display::ROTATE_90:
 107       xrandr_rotation = RR_Rotate_90;
 108       break;
 109     case gfx::Display::ROTATE_180:
 110       xrandr_rotation = RR_Rotate_180;
 111       break;
 112     case gfx::Display::ROTATE_270:
 113       xrandr_rotation = RR_Rotate_270;
 114       break;
 115   }
 116
 117   int internal = display.IsInternal() ? 1 : 0;
 118   gfx::AcceleratedWidget xwindow = host->GetAcceleratedWidget();
 119   ui::SetIntProperty(xwindow, kInternalProp, kCARDINAL, internal);
 120   ui::SetIntProperty(xwindow, kRotationProp, kCARDINAL, xrandr_rotation);
 121   ui::SetIntProperty(xwindow,
 122                      kScaleFactorProp,
 123                      kCARDINAL,
 124                      100 * display.device_scale_factor());
 125 #endif
 126   scoped_ptr<RootWindowTransformer> transformer(
 127       CreateRootWindowTransformerForDisplay(host->window(), display));
 128   ash_host->SetRootWindowTransformer(transformer.Pass());
 129
 130   DisplayMode mode;
 131   if (GetDisplayManager()->GetSelectedModeForDisplayId(display.id(), &mode) &&
 132       mode.refresh_rate > 0.0f) {
 133     host->compositor()->vsync_manager()->SetAuthoritativeVSyncInterval(
 134         base::TimeDelta::FromMicroseconds(
 135             base::Time::kMicrosecondsPerSecond / mode.refresh_rate));
 136   }
 137 }
 138
 139 aura::Window* GetWindow(AshWindowTreeHost* ash_host) {
 140   CHECK(ash_host->AsWindowTreeHost());
 141   return ash_host->AsWindowTreeHost()->window();
 142 }
 143
 144 }  // namespace
 145
 146 // A utility class to store/restore focused/active window
 147 // when the display configuration has changed.
 148 class FocusActivationStore {
 149  public:
 150   FocusActivationStore()
 151       : activation_client_(NULL),
 152         capture_client_(NULL),
 153         focus_client_(NULL),
 154         focused_(NULL),
 155         active_(NULL) {
 156   }
 157
 158   void Store(bool clear_focus) {
 159     if (!activation_client_) {
 160       aura::Window* root = Shell::GetPrimaryRootWindow();
 161       activation_client_ = aura::client::GetActivationClient(root);
 162       capture_client_ = aura::client::GetCaptureClient(root);
 163       focus_client_ = aura::client::GetFocusClient(root);
 164     }
 165     focused_ = focus_client_->GetFocusedWindow();
 166     if (focused_)
 167       tracker_.Add(focused_);
 168     active_ = activation_client_->GetActiveWindow();
 169     if (active_ && focused_ != active_)
 170       tracker_.Add(active_);
 171
 172     // Deactivate the window to close menu / bubble windows.
 173     if (clear_focus)
 174       activation_client_->DeactivateWindow(active_);
 175
 176     // Release capture if any.
 177     capture_client_->SetCapture(NULL);
 178     // Clear the focused window if any. This is necessary because a
 179     // window may be deleted when losing focus (fullscreen flash for
 180     // example).  If the focused window is still alive after move, it'll
 181     // be re-focused below.
 182     if (clear_focus)
 183       focus_client_->FocusWindow(NULL);
 184   }
 185
 186   void Restore() {
 187     // Restore focused or active window if it's still alive.
 188     if (focused_ && tracker_.Contains(focused_)) {
 189       focus_client_->FocusWindow(focused_);
 190     } else if (active_ && tracker_.Contains(active_)) {
 191       activation_client_->ActivateWindow(active_);
 192     }
 193     if (focused_)
 194       tracker_.Remove(focused_);
 195     if (active_)
 196       tracker_.Remove(active_);
 197     focused_ = NULL;
 198     active_ = NULL;
 199   }
 200
 201  private:
 202   aura::client::ActivationClient* activation_client_;
 203   aura::client::CaptureClient* capture_client_;
 204   aura::client::FocusClient* focus_client_;
 205   aura::WindowTracker tracker_;
 206   aura::Window* focused_;
 207   aura::Window* active_;
 208
 209   DISALLOW_COPY_AND_ASSIGN(FocusActivationStore);
 210 };
 211
 212 ////////////////////////////////////////////////////////////////////////////////
 213 // DisplayChangeLimiter
 214
 215 DisplayController::DisplayChangeLimiter::DisplayChangeLimiter()
 216     : throttle_timeout_(base::Time::Now()) {
 217 }
 218
 219 void DisplayController::DisplayChangeLimiter::SetThrottleTimeout(
 220     int64 throttle_ms) {
 221   throttle_timeout_ =
 222       base::Time::Now() + base::TimeDelta::FromMilliseconds(throttle_ms);
 223 }
 224
 225 bool DisplayController::DisplayChangeLimiter::IsThrottled() const {
 226   return base::Time::Now() < throttle_timeout_;
 227 }
 228
 229 ////////////////////////////////////////////////////////////////////////////////
 230 // DisplayController
 231
 232 DisplayController::DisplayController()
 233     : primary_tree_host_for_replace_(NULL),
 234       focus_activation_store_(new FocusActivationStore()),
 235       cursor_window_controller_(new CursorWindowController()),
 236       mirror_window_controller_(new MirrorWindowController()),
 237       weak_ptr_factory_(this) {
 238 #if defined(OS_CHROMEOS)
 239   if (base::SysInfo::IsRunningOnChromeOS())
 240     limiter_.reset(new DisplayChangeLimiter);
 241 #endif
 242   // Reset primary display to make sure that tests don't use
 243   // stale display info from previous tests.
 244   primary_display_id = gfx::Display::kInvalidDisplayID;
 245 }
 246
 247 DisplayController::~DisplayController() {
 248 }
 249
 250 void DisplayController::Start() {
 251   // Created here so that Shell has finished being created. Adds itself
 252   // as a ShellObserver.
 253   virtual_keyboard_window_controller_.reset(
 254       new VirtualKeyboardWindowController);
 255   Shell::GetScreen()->AddObserver(this);
 256   Shell::GetInstance()->display_manager()->set_delegate(this);
 257 }
 258
 259 void DisplayController::Shutdown() {
 260   // Unset the display manager's delegate here because
 261   // DisplayManager outlives DisplayController.
 262   Shell::GetInstance()->display_manager()->set_delegate(NULL);
 263
 264   cursor_window_controller_.reset();
 265   mirror_window_controller_.reset();
 266   virtual_keyboard_window_controller_.reset();
 267
 268   Shell::GetScreen()->RemoveObserver(this);
 269   // Delete all root window controllers, which deletes root window
 270   // from the last so that the primary root window gets deleted last.
 271   for (WindowTreeHostMap::const_reverse_iterator it =
 272            window_tree_hosts_.rbegin();
 273        it != window_tree_hosts_.rend();
 274        ++it) {
 275     RootWindowController* controller =
 276         GetRootWindowController(GetWindow(it->second));
 277     DCHECK(controller);
 278     delete controller;
 279   }
 280 }
 281
 282 void DisplayController::CreatePrimaryHost(
 283     const AshWindowTreeHostInitParams& init_params) {
 284   const gfx::Display& primary_candidate =
 285       GetDisplayManager()->GetPrimaryDisplayCandidate();
 286   primary_display_id = primary_candidate.id();
 287   CHECK_NE(gfx::Display::kInvalidDisplayID, primary_display_id);
 288   AddWindowTreeHostForDisplay(primary_candidate, init_params);
 289 }
 290
 291 void DisplayController::InitDisplays() {
 292   RootWindowController::CreateForPrimaryDisplay(
 293       window_tree_hosts_[primary_display_id]);
 294
 295   DisplayManager* display_manager = GetDisplayManager();
 296   for (size_t i = 0; i < display_manager->GetNumDisplays(); ++i) {
 297     const gfx::Display& display = display_manager->GetDisplayAt(i);
 298     if (primary_display_id != display.id()) {
 299       AshWindowTreeHost* ash_host = AddWindowTreeHostForDisplay(
 300           display, AshWindowTreeHostInitParams());
 301       RootWindowController::CreateForSecondaryDisplay(ash_host);
 302     }
 303   }
 304   UpdateHostWindowNames();
 305
 306   FOR_EACH_OBSERVER(Observer, observers_, OnDisplaysInitialized());
 307 }
 308
 309 void DisplayController::AddObserver(Observer* observer) {
 310   observers_.AddObserver(observer);
 311 }
 312
 313 void DisplayController::RemoveObserver(Observer* observer) {
 314   observers_.RemoveObserver(observer);
 315 }
 316
 317 // static
 318 int64 DisplayController::GetPrimaryDisplayId() {
 319   CHECK_NE(gfx::Display::kInvalidDisplayID, primary_display_id);
 320   return primary_display_id;
 321 }
 322
 323 aura::Window* DisplayController::GetPrimaryRootWindow() {
 324   return GetRootWindowForDisplayId(primary_display_id);
 325 }
 326
 327 aura::Window* DisplayController::GetRootWindowForDisplayId(int64 id) {
 328   DCHECK_EQ(1u, window_tree_hosts_.count(id));
 329   AshWindowTreeHost* host = window_tree_hosts_[id];
 330   CHECK(host);
 331   return GetWindow(host);
 332 }
 333
 334 void DisplayController::CloseChildWindows() {
 335   for (WindowTreeHostMap::const_iterator it = window_tree_hosts_.begin();
 336        it != window_tree_hosts_.end();
 337        ++it) {
 338     aura::Window* root_window = GetWindow(it->second);
 339     RootWindowController* controller = GetRootWindowController(root_window);
 340     if (controller) {
 341       controller->CloseChildWindows();
 342     } else {
 343       while (!root_window->children().empty()) {
 344         aura::Window* child = root_window->children()[0];
 345         delete child;
 346       }
 347     }
 348   }
 349 }
 350
 351 aura::Window::Windows DisplayController::GetAllRootWindows() {
 352   aura::Window::Windows windows;
 353   for (WindowTreeHostMap::const_iterator it = window_tree_hosts_.begin();
 354        it != window_tree_hosts_.end();
 355        ++it) {
 356     DCHECK(it->second);
 357     if (GetRootWindowController(GetWindow(it->second)))
 358       windows.push_back(GetWindow(it->second));
 359   }
 360   return windows;
 361 }
 362
 363 gfx::Insets DisplayController::GetOverscanInsets(int64 display_id) const {
 364   return GetDisplayManager()->GetOverscanInsets(display_id);
 365 }
 366
 367 void DisplayController::SetOverscanInsets(int64 display_id,
 368                                           const gfx::Insets& insets_in_dip) {
 369   GetDisplayManager()->SetOverscanInsets(display_id, insets_in_dip);
 370 }
 371
 372 std::vector<RootWindowController*>
 373 DisplayController::GetAllRootWindowControllers() {
 374   std::vector<RootWindowController*> controllers;
 375   for (WindowTreeHostMap::const_iterator it = window_tree_hosts_.begin();
 376        it != window_tree_hosts_.end();
 377        ++it) {
 378     RootWindowController* controller =
 379         GetRootWindowController(GetWindow(it->second));
 380     if (controller)
 381       controllers.push_back(controller);
 382   }
 383   return controllers;
 384 }
 385
 386 void DisplayController::ToggleMirrorMode() {
 387   DisplayManager* display_manager = GetDisplayManager();
 388   if (display_manager->num_connected_displays() <= 1)
 389     return;
 390
 391   if (limiter_) {
 392     if  (limiter_->IsThrottled())
 393       return;
 394     limiter_->SetThrottleTimeout(kCycleDisplayThrottleTimeoutMs);
 395   }
 396 #if defined(OS_CHROMEOS)
 397   Shell* shell = Shell::GetInstance();
 398   DisplayConfiguratorAnimation* animation =
 399       shell->display_configurator_animation();
 400   animation->StartFadeOutAnimation(
 401       base::Bind(&DisplayController::SetMirrorModeAfterAnimation,
 402                  weak_ptr_factory_.GetWeakPtr(),
 403                  !display_manager->IsMirrored()));
 404 #endif
 405 }
 406
 407 void DisplayController::SwapPrimaryDisplay() {
 408   if (limiter_) {
 409     if  (limiter_->IsThrottled())
 410       return;
 411     limiter_->SetThrottleTimeout(kSwapDisplayThrottleTimeoutMs);
 412   }
 413
 414   if (Shell::GetScreen()->GetNumDisplays() > 1) {
 415 #if defined(OS_CHROMEOS)
 416     DisplayConfiguratorAnimation* animation =
 417         Shell::GetInstance()->display_configurator_animation();
 418     if (animation) {
 419       animation->StartFadeOutAnimation(base::Bind(
 420           &DisplayController::OnFadeOutForSwapDisplayFinished,
 421           weak_ptr_factory_.GetWeakPtr()));
 422     } else {
 423       SetPrimaryDisplay(ScreenUtil::GetSecondaryDisplay());
 424     }
 425 #else
 426     SetPrimaryDisplay(ScreenUtil::GetSecondaryDisplay());
 427 #endif
 428   }
 429 }
 430
 431 void DisplayController::SetPrimaryDisplayId(int64 id) {
 432   DCHECK_NE(gfx::Display::kInvalidDisplayID, id);
 433   if (id == gfx::Display::kInvalidDisplayID || primary_display_id == id)
 434     return;
 435
 436   const gfx::Display& display = GetDisplayManager()->GetDisplayForId(id);
 437   if (display.is_valid())
 438     SetPrimaryDisplay(display);
 439 }
 440
 441 void DisplayController::SetPrimaryDisplay(
 442     const gfx::Display& new_primary_display) {
 443   DisplayManager* display_manager = GetDisplayManager();
 444   DCHECK(new_primary_display.is_valid());
 445   DCHECK(display_manager->IsActiveDisplay(new_primary_display));
 446
 447   if (!new_primary_display.is_valid() ||
 448       !display_manager->IsActiveDisplay(new_primary_display)) {
 449     LOG(ERROR) << "Invalid or non-existent display is requested:"
 450                << new_primary_display.ToString();
 451     return;
 452   }
 453
 454   if (primary_display_id == new_primary_display.id() ||
 455       window_tree_hosts_.size() < 2) {
 456     return;
 457   }
 458
 459   AshWindowTreeHost* non_primary_host =
 460       window_tree_hosts_[new_primary_display.id()];
 461   LOG_IF(ERROR, !non_primary_host)
 462       << "Unknown display is requested in SetPrimaryDisplay: id="
 463       << new_primary_display.id();
 464   if (!non_primary_host)
 465     return;
 466
 467   gfx::Display old_primary_display = Shell::GetScreen()->GetPrimaryDisplay();
 468
 469   // Swap root windows between current and new primary display.
 470   AshWindowTreeHost* primary_host = window_tree_hosts_[primary_display_id];
 471   CHECK(primary_host);
 472   CHECK_NE(primary_host, non_primary_host);
 473
 474   window_tree_hosts_[new_primary_display.id()] = primary_host;
 475   GetRootWindowSettings(GetWindow(primary_host))->display_id =
 476       new_primary_display.id();
 477
 478   window_tree_hosts_[old_primary_display.id()] = non_primary_host;
 479   GetRootWindowSettings(GetWindow(non_primary_host))->display_id =
 480       old_primary_display.id();
 481
 482   primary_display_id = new_primary_display.id();
 483   GetDisplayManager()->layout_store()->UpdatePrimaryDisplayId(
 484       display_manager->GetCurrentDisplayIdPair(), primary_display_id);
 485
 486   UpdateWorkAreaOfDisplayNearestWindow(GetWindow(primary_host),
 487                                        old_primary_display.GetWorkAreaInsets());
 488   UpdateWorkAreaOfDisplayNearestWindow(GetWindow(non_primary_host),
 489                                        new_primary_display.GetWorkAreaInsets());
 490
 491   // Update the dispay manager with new display info.
 492   std::vector<DisplayInfo> display_info_list;
 493   display_info_list.push_back(display_manager->GetDisplayInfo(
 494       primary_display_id));
 495   display_info_list.push_back(display_manager->GetDisplayInfo(
 496       ScreenUtil::GetSecondaryDisplay().id()));
 497   GetDisplayManager()->set_force_bounds_changed(true);
 498   GetDisplayManager()->UpdateDisplays(display_info_list);
 499   GetDisplayManager()->set_force_bounds_changed(false);
 500 }
 501
 502 void DisplayController::EnsurePointerInDisplays() {
 503   // If the mouse is currently on a display in native location,
 504   // use the same native location. Otherwise find the display closest
 505   // to the current cursor location in screen coordinates.
 506
 507   gfx::Point point_in_screen = Shell::GetScreen()->GetCursorScreenPoint();
 508   gfx::Point target_location_in_native;
 509   int64 closest_distance_squared = -1;
 510   DisplayManager* display_manager = GetDisplayManager();
 511
 512   aura::Window* dst_root_window = NULL;
 513   for (size_t i = 0; i < display_manager->GetNumDisplays(); ++i) {
 514     const gfx::Display& display = display_manager->GetDisplayAt(i);
 515     const DisplayInfo display_info =
 516         display_manager->GetDisplayInfo(display.id());
 517     aura::Window* root_window = GetRootWindowForDisplayId(display.id());
 518     if (display_info.bounds_in_native().Contains(
 519             cursor_location_in_native_coords_for_restore_)) {
 520       dst_root_window = root_window;
 521       target_location_in_native = cursor_location_in_native_coords_for_restore_;
 522       break;
 523     }
 524     gfx::Point center = display.bounds().CenterPoint();
 525     // Use the distance squared from the center of the dislay. This is not
 526     // exactly "closest" display, but good enough to pick one
 527     // appropriate (and there are at most two displays).
 528     // We don't care about actual distance, only relative to other displays, so
 529     // using the LengthSquared() is cheaper than Length().
 530
 531     int64 distance_squared = (center - point_in_screen).LengthSquared();
 532     if (closest_distance_squared < 0 ||
 533         closest_distance_squared > distance_squared) {
 534       aura::Window* root_window = GetRootWindowForDisplayId(display.id());
 535       aura::client::ScreenPositionClient* client =
 536           aura::client::GetScreenPositionClient(root_window);
 537       client->ConvertPointFromScreen(root_window, &center);
 538       root_window->GetHost()->ConvertPointToNativeScreen(&center);
 539       dst_root_window = root_window;
 540       target_location_in_native = center;
 541       closest_distance_squared = distance_squared;
 542     }
 543   }
 544   dst_root_window->GetHost()->ConvertPointFromNativeScreen(
 545       &target_location_in_native);
 546   dst_root_window->MoveCursorTo(target_location_in_native);
 547 }
 548
 549 bool DisplayController::UpdateWorkAreaOfDisplayNearestWindow(
 550     const aura::Window* window,
 551     const gfx::Insets& insets) {
 552   const aura::Window* root_window = window->GetRootWindow();
 553   int64 id = GetRootWindowSettings(root_window)->display_id;
 554   // if id is |kInvaildDisplayID|, it's being deleted.
 555   DCHECK(id != gfx::Display::kInvalidDisplayID);
 556   return GetDisplayManager()->UpdateWorkAreaOfDisplay(id, insets);
 557 }
 558
 559 void DisplayController::OnDisplayAdded(const gfx::Display& display) {
 560   if (primary_tree_host_for_replace_) {
 561     DCHECK(window_tree_hosts_.empty());
 562     primary_display_id = display.id();
 563     window_tree_hosts_[display.id()] = primary_tree_host_for_replace_;
 564     GetRootWindowSettings(GetWindow(primary_tree_host_for_replace_))
 565         ->display_id = display.id();
 566     primary_tree_host_for_replace_ = NULL;
 567     const DisplayInfo& display_info =
 568         GetDisplayManager()->GetDisplayInfo(display.id());
 569     AshWindowTreeHost* ash_host = window_tree_hosts_[display.id()];
 570     ash_host->AsWindowTreeHost()->SetBounds(display_info.bounds_in_native());
 571     SetDisplayPropertiesOnHost(ash_host, display);
 572   } else {
 573     if (primary_display_id == gfx::Display::kInvalidDisplayID)
 574       primary_display_id = display.id();
 575     DCHECK(!window_tree_hosts_.empty());
 576     AshWindowTreeHost* ash_host = AddWindowTreeHostForDisplay(
 577         display, AshWindowTreeHostInitParams());
 578     RootWindowController::CreateForSecondaryDisplay(ash_host);
 579   }
 580 }
 581
 582 void DisplayController::OnDisplayRemoved(const gfx::Display& display) {
 583   AshWindowTreeHost* host_to_delete = window_tree_hosts_[display.id()];
 584   CHECK(host_to_delete) << display.ToString();
 585
 586   // Display for root window will be deleted when the Primary RootWindow
 587   // is deleted by the Shell.
 588   window_tree_hosts_.erase(display.id());
 589
 590   // When the primary root window's display is removed, move the primary
 591   // root to the other display.
 592   if (primary_display_id == display.id()) {
 593     // Temporarily store the primary root window in
 594     // |primary_root_window_for_replace_| when replacing the display.
 595     if (window_tree_hosts_.size() == 0) {
 596       primary_display_id = gfx::Display::kInvalidDisplayID;
 597       primary_tree_host_for_replace_ = host_to_delete;
 598       return;
 599     }
 600     DCHECK_EQ(1U, window_tree_hosts_.size());
 601     primary_display_id = ScreenUtil::GetSecondaryDisplay().id();
 602     AshWindowTreeHost* primary_host = host_to_delete;
 603
 604     // Delete the other host instead.
 605     host_to_delete = window_tree_hosts_[primary_display_id];
 606     GetRootWindowSettings(GetWindow(host_to_delete))->display_id = display.id();
 607
 608     // Setup primary root.
 609     window_tree_hosts_[primary_display_id] = primary_host;
 610     GetRootWindowSettings(GetWindow(primary_host))->display_id =
 611         primary_display_id;
 612
 613     OnDisplayMetricsChanged(
 614         GetDisplayManager()->GetDisplayForId(primary_display_id),
 615         DISPLAY_METRIC_BOUNDS);
 616   }
 617   RootWindowController* controller =
 618       GetRootWindowController(GetWindow(host_to_delete));
 619   DCHECK(controller);
 620   controller->MoveWindowsTo(GetPrimaryRootWindow());
 621   // Delete most of root window related objects, but don't delete
 622   // root window itself yet because the stack may be using it.
 623   controller->Shutdown();
 624   base::MessageLoop::current()->DeleteSoon(FROM_HERE, controller);
 625 }
 626
 627 void DisplayController::OnDisplayMetricsChanged(const gfx::Display& display,
 628                                                 uint32_t metrics) {
 629   if (!(metrics & (DISPLAY_METRIC_BOUNDS | DISPLAY_METRIC_ROTATION |
 630                    DISPLAY_METRIC_DEVICE_SCALE_FACTOR)))
 631     return;
 632
 633   const DisplayInfo& display_info =
 634       GetDisplayManager()->GetDisplayInfo(display.id());
 635   DCHECK(!display_info.bounds_in_native().IsEmpty());
 636   AshWindowTreeHost* ash_host = window_tree_hosts_[display.id()];
 637   ash_host->AsWindowTreeHost()->SetBounds(display_info.bounds_in_native());
 638   SetDisplayPropertiesOnHost(ash_host, display);
 639 }
 640
 641 void DisplayController::OnHostResized(const aura::WindowTreeHost* host) {
 642   gfx::Display display = Shell::GetScreen()->GetDisplayNearestWindow(
 643       const_cast<aura::Window*>(host->window()));
 644
 645   DisplayManager* display_manager = GetDisplayManager();
 646   if (display_manager->UpdateDisplayBounds(display.id(), host->GetBounds())) {
 647     mirror_window_controller_->UpdateWindow();
 648     cursor_window_controller_->UpdateContainer();
 649   }
 650 }
 651
 652 void DisplayController::CreateOrUpdateNonDesktopDisplay(
 653     const DisplayInfo& info) {
 654   switch (GetDisplayManager()->second_display_mode()) {
 655     case DisplayManager::MIRRORING:
 656       mirror_window_controller_->UpdateWindow(info);
 657       cursor_window_controller_->UpdateContainer();
 658       virtual_keyboard_window_controller_->Close();
 659       break;
 660     case DisplayManager::VIRTUAL_KEYBOARD:
 661       mirror_window_controller_->Close();
 662       cursor_window_controller_->UpdateContainer();
 663       virtual_keyboard_window_controller_->UpdateWindow(info);
 664       break;
 665     case DisplayManager::EXTENDED:
 666       NOTREACHED();
 667   }
 668 }
 669
 670 void DisplayController::CloseNonDesktopDisplay() {
 671   mirror_window_controller_->Close();
 672   cursor_window_controller_->UpdateContainer();
 673   virtual_keyboard_window_controller_->Close();
 674 }
 675
 676 void DisplayController::PreDisplayConfigurationChange(bool clear_focus) {
 677   FOR_EACH_OBSERVER(Observer, observers_, OnDisplayConfigurationChanging());
 678   focus_activation_store_->Store(clear_focus);
 679   gfx::Screen* screen = Shell::GetScreen();
 680   gfx::Point point_in_screen = screen->GetCursorScreenPoint();
 681   gfx::Display display = screen->GetDisplayNearestPoint(point_in_screen);
 682   aura::Window* root_window = GetRootWindowForDisplayId(display.id());
 683
 684   aura::client::ScreenPositionClient* client =
 685       aura::client::GetScreenPositionClient(root_window);
 686   client->ConvertPointFromScreen(root_window, &point_in_screen);
 687   root_window->GetHost()->ConvertPointToNativeScreen(&point_in_screen);
 688   cursor_location_in_native_coords_for_restore_ = point_in_screen;
 689 }
 690
 691 void DisplayController::PostDisplayConfigurationChange() {
 692   if (limiter_)
 693     limiter_->SetThrottleTimeout(kAfterDisplayChangeThrottleTimeoutMs);
 694
 695   focus_activation_store_->Restore();
 696
 697   DisplayManager* display_manager = GetDisplayManager();
 698   DisplayLayoutStore* layout_store = display_manager->layout_store();
 699   if (display_manager->num_connected_displays() > 1) {
 700     DisplayIdPair pair = display_manager->GetCurrentDisplayIdPair();
 701     layout_store->UpdateMirrorStatus(pair, display_manager->IsMirrored());
 702     DisplayLayout layout = layout_store->GetRegisteredDisplayLayout(pair);
 703
 704     if (Shell::GetScreen()->GetNumDisplays() > 1 ) {
 705       int64 primary_id = layout.primary_id;
 706       SetPrimaryDisplayId(
 707           primary_id == gfx::Display::kInvalidDisplayID ?
 708           pair.first : primary_id);
 709       // Update the primary_id in case the above call is
 710       // ignored. Happens when a) default layout's primary id
 711       // doesn't exist, or b) the primary_id has already been
 712       // set to the same and didn't update it.
 713       layout_store->UpdatePrimaryDisplayId(
 714           pair, Shell::GetScreen()->GetPrimaryDisplay().id());
 715     }
 716   }
 717   FOR_EACH_OBSERVER(Observer, observers_, OnDisplayConfigurationChanged());
 718   UpdateHostWindowNames();
 719   EnsurePointerInDisplays();
 720 }
 721
 722 AshWindowTreeHost* DisplayController::AddWindowTreeHostForDisplay(
 723     const gfx::Display& display,
 724     const AshWindowTreeHostInitParams& init_params) {
 725   static int host_count = 0;
 726   const DisplayInfo& display_info =
 727       GetDisplayManager()->GetDisplayInfo(display.id());
 728   AshWindowTreeHostInitParams params_with_bounds(init_params);
 729   params_with_bounds.initial_bounds = display_info.bounds_in_native();
 730   AshWindowTreeHost* ash_host = AshWindowTreeHost::Create(params_with_bounds);
 731   aura::WindowTreeHost* host = ash_host->AsWindowTreeHost();
 732
 733   host->window()->SetName(base::StringPrintf("RootWindow-%d", host_count++));
 734   host->window()->set_title(base::UTF8ToUTF16(display_info.name()));
 735   host->compositor()->SetBackgroundColor(SK_ColorBLACK);
 736   // No need to remove our observer observer because the DisplayController
 737   // outlives the host.
 738   host->AddObserver(this);
 739   InitRootWindowSettings(host->window())->display_id = display.id();
 740   host->InitHost();
 741
 742   window_tree_hosts_[display.id()] = ash_host;
 743   SetDisplayPropertiesOnHost(ash_host, display);
 744
 745 #if defined(OS_CHROMEOS)
 746   static bool force_constrain_pointer_to_root =
 747       CommandLine::ForCurrentProcess()->HasSwitch(
 748           switches::kAshConstrainPointerToRoot);
 749   if (base::SysInfo::IsRunningOnChromeOS() || force_constrain_pointer_to_root)
 750     ash_host->ConfineCursorToRootWindow();
 751 #endif
 752   return ash_host;
 753 }
 754
 755 void DisplayController::OnFadeOutForSwapDisplayFinished() {
 756 #if defined(OS_CHROMEOS)
 757   SetPrimaryDisplay(ScreenUtil::GetSecondaryDisplay());
 758   Shell::GetInstance()->display_configurator_animation()
 759       ->StartFadeInAnimation();
 760 #endif
 761 }
 762
 763 void DisplayController::SetMirrorModeAfterAnimation(bool mirror) {
 764   GetDisplayManager()->SetMirrorMode(mirror);
 765 }
 766
 767 void DisplayController::UpdateHostWindowNames() {
 768 #if defined(USE_X11)
 769   // crbug.com/120229 - set the window title for the primary dislpay
 770   // to "aura_root_0" so gtalk can find the primary root window to broadcast.
 771   // TODO(jhorwich) Remove this once Chrome supports window-based broadcasting.
 772   aura::Window* primary = Shell::GetPrimaryRootWindow();
 773   aura::Window::Windows root_windows = Shell::GetAllRootWindows();
 774   for (size_t i = 0; i < root_windows.size(); ++i) {
 775     std::string name =
 776         root_windows[i] == primary ? "aura_root_0" : "aura_root_x";
 777     gfx::AcceleratedWidget xwindow =
 778         root_windows[i]->GetHost()->GetAcceleratedWidget();
 779     XStoreName(gfx::GetXDisplay(), xwindow, name.c_str());
 780   }
 781 #endif
 782 }
 783
 784 }  // namespace ash