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/host/ash_window_tree_host.h"
  18 #include "ash/host/ash_window_tree_host_init_params.h"
  19 #include "ash/host/root_window_transformer.h"
  20 #include "ash/root_window_controller.h"
  21 #include "ash/root_window_settings.h"
  22 #include "ash/screen_util.h"
  23 #include "ash/shell.h"
  24 #include "ash/shell_delegate.h"
  25 #include "ash/wm/coordinate_conversion.h"
  26 #include "base/command_line.h"
  27 #include "base/stl_util.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 #if defined(OS_CHROMEOS) && defined(USE_OZONE)
  61 #include "ui/events/ozone/chromeos/cursor_controller.h"
  62 #endif
  63
  64 namespace ash {
  65 namespace {
  66
  67 // Primary display stored in global object as it can be
  68 // accessed after Shell is deleted. A separate display instance is created
  69 // during the shutdown instead of always keeping two display instances
  70 // (one here and another one in display_manager) in sync, which is error prone.
  71 // This is initialized in the constructor, and then in CreatePrimaryHost().
  72 int64 primary_display_id = -1;
  73
  74 // Specifies how long the display change should have been disabled
  75 // after each display change operations.
  76 // |kCycleDisplayThrottleTimeoutMs| is set to be longer to avoid
  77 // changing the settings while the system is still configurating
  78 // displays. It will be overriden by |kAfterDisplayChangeThrottleTimeoutMs|
  79 // when the display change happens, so the actual timeout is much shorter.
  80 const int64 kAfterDisplayChangeThrottleTimeoutMs = 500;
  81 const int64 kCycleDisplayThrottleTimeoutMs = 4000;
  82 const int64 kSwapDisplayThrottleTimeoutMs = 500;
  83
  84 #if defined(USE_OZONE) && defined(OS_CHROMEOS)
  85 // Add 20% more cursor motion on non-integrated displays.
  86 const float kCursorMultiplierForExternalDisplays = 1.2f;
  87 #endif
  88
  89 DisplayManager* GetDisplayManager() {
  90   return Shell::GetInstance()->display_manager();
  91 }
  92
  93 void SetDisplayPropertiesOnHost(AshWindowTreeHost* ash_host,
  94                                 const gfx::Display& display) {
  95   DisplayInfo info = GetDisplayManager()->GetDisplayInfo(display.id());
  96   aura::WindowTreeHost* host = ash_host->AsWindowTreeHost();
  97 #if defined(OS_CHROMEOS)
  98 #if defined(USE_X11)
  99   // Native window property (Atom in X11) that specifies the display's
 100   // rotation, scale factor and if it's internal display.  They are
 101   // read and used by touchpad/mouse driver directly on X (contact
 102   // adlr@ for more details on touchpad/mouse driver side). The value
 103   // of the rotation is one of 0 (normal), 1 (90 degrees clockwise), 2
 104   // (180 degree) or 3 (270 degrees clockwise).  The value of the
 105   // scale factor is in percent (100, 140, 200 etc).
 106   const char kRotationProp[] = "_CHROME_DISPLAY_ROTATION";
 107   const char kScaleFactorProp[] = "_CHROME_DISPLAY_SCALE_FACTOR";
 108   const char kInternalProp[] = "_CHROME_DISPLAY_INTERNAL";
 109   const char kCARDINAL[] = "CARDINAL";
 110   int xrandr_rotation = RR_Rotate_0;
 111   switch (info.rotation()) {
 112     case gfx::Display::ROTATE_0:
 113       xrandr_rotation = RR_Rotate_0;
 114       break;
 115     case gfx::Display::ROTATE_90:
 116       xrandr_rotation = RR_Rotate_90;
 117       break;
 118     case gfx::Display::ROTATE_180:
 119       xrandr_rotation = RR_Rotate_180;
 120       break;
 121     case gfx::Display::ROTATE_270:
 122       xrandr_rotation = RR_Rotate_270;
 123       break;
 124   }
 125
 126   int internal = display.IsInternal() ? 1 : 0;
 127   gfx::AcceleratedWidget xwindow = host->GetAcceleratedWidget();
 128   ui::SetIntProperty(xwindow, kInternalProp, kCARDINAL, internal);
 129   ui::SetIntProperty(xwindow, kRotationProp, kCARDINAL, xrandr_rotation);
 130   ui::SetIntProperty(xwindow,
 131                      kScaleFactorProp,
 132                      kCARDINAL,
 133                      100 * display.device_scale_factor());
 134 #elif defined(USE_OZONE)
 135   // Scale all motion on High-DPI displays.
 136   float scale = display.device_scale_factor();
 137
 138   if (!display.IsInternal())
 139     scale *= kCursorMultiplierForExternalDisplays;
 140
 141   ui::CursorController::GetInstance()->SetCursorConfigForWindow(
 142       host->GetAcceleratedWidget(), info.rotation(), scale);
 143 #endif
 144 #endif
 145   scoped_ptr<RootWindowTransformer> transformer(
 146       CreateRootWindowTransformerForDisplay(host->window(), display));
 147   ash_host->SetRootWindowTransformer(transformer.Pass());
 148
 149   DisplayMode mode =
 150       GetDisplayManager()->GetActiveModeForDisplayId(display.id());
 151   if (mode.refresh_rate > 0.0f) {
 152     host->compositor()->vsync_manager()->SetAuthoritativeVSyncInterval(
 153         base::TimeDelta::FromMicroseconds(
 154             base::Time::kMicrosecondsPerSecond / mode.refresh_rate));
 155   }
 156 }
 157
 158 void ClearDisplayPropertiesOnHost(AshWindowTreeHost* ash_host,
 159                                   const gfx::Display& display) {
 160 #if defined(OS_CHROMEOS) && defined(USE_OZONE)
 161   aura::WindowTreeHost* host = ash_host->AsWindowTreeHost();
 162   ui::CursorController::GetInstance()->ClearCursorConfigForWindow(
 163       host->GetAcceleratedWidget());
 164 #endif
 165 }
 166
 167 aura::Window* GetWindow(AshWindowTreeHost* ash_host) {
 168   CHECK(ash_host->AsWindowTreeHost());
 169   return ash_host->AsWindowTreeHost()->window();
 170 }
 171
 172 }  // namespace
 173
 174 // A utility class to store/restore focused/active window
 175 // when the display configuration has changed.
 176 class FocusActivationStore {
 177  public:
 178   FocusActivationStore()
 179       : activation_client_(NULL),
 180         capture_client_(NULL),
 181         focus_client_(NULL),
 182         focused_(NULL),
 183         active_(NULL) {
 184   }
 185
 186   void Store(bool clear_focus) {
 187     if (!activation_client_) {
 188       aura::Window* root = Shell::GetPrimaryRootWindow();
 189       activation_client_ = aura::client::GetActivationClient(root);
 190       capture_client_ = aura::client::GetCaptureClient(root);
 191       focus_client_ = aura::client::GetFocusClient(root);
 192     }
 193     focused_ = focus_client_->GetFocusedWindow();
 194     if (focused_)
 195       tracker_.Add(focused_);
 196     active_ = activation_client_->GetActiveWindow();
 197     if (active_ && focused_ != active_)
 198       tracker_.Add(active_);
 199
 200     // Deactivate the window to close menu / bubble windows.
 201     if (clear_focus)
 202       activation_client_->DeactivateWindow(active_);
 203
 204     // Release capture if any.
 205     capture_client_->SetCapture(NULL);
 206     // Clear the focused window if any. This is necessary because a
 207     // window may be deleted when losing focus (fullscreen flash for
 208     // example).  If the focused window is still alive after move, it'll
 209     // be re-focused below.
 210     if (clear_focus)
 211       focus_client_->FocusWindow(NULL);
 212   }
 213
 214   void Restore() {
 215     // Restore focused or active window if it's still alive.
 216     if (focused_ && tracker_.Contains(focused_)) {
 217       focus_client_->FocusWindow(focused_);
 218     } else if (active_ && tracker_.Contains(active_)) {
 219       activation_client_->ActivateWindow(active_);
 220     }
 221     if (focused_)
 222       tracker_.Remove(focused_);
 223     if (active_)
 224       tracker_.Remove(active_);
 225     focused_ = NULL;
 226     active_ = NULL;
 227   }
 228
 229  private:
 230   aura::client::ActivationClient* activation_client_;
 231   aura::client::CaptureClient* capture_client_;
 232   aura::client::FocusClient* focus_client_;
 233   aura::WindowTracker tracker_;
 234   aura::Window* focused_;
 235   aura::Window* active_;
 236
 237   DISALLOW_COPY_AND_ASSIGN(FocusActivationStore);
 238 };
 239
 240 ////////////////////////////////////////////////////////////////////////////////
 241 // DisplayChangeLimiter
 242
 243 DisplayController::DisplayChangeLimiter::DisplayChangeLimiter()
 244     : throttle_timeout_(base::Time::Now()) {
 245 }
 246
 247 void DisplayController::DisplayChangeLimiter::SetThrottleTimeout(
 248     int64 throttle_ms) {
 249   throttle_timeout_ =
 250       base::Time::Now() + base::TimeDelta::FromMilliseconds(throttle_ms);
 251 }
 252
 253 bool DisplayController::DisplayChangeLimiter::IsThrottled() const {
 254   return base::Time::Now() < throttle_timeout_;
 255 }
 256
 257 ////////////////////////////////////////////////////////////////////////////////
 258 // DisplayController
 259
 260 DisplayController::DisplayController()
 261     : primary_tree_host_for_replace_(NULL),
 262       focus_activation_store_(new FocusActivationStore()),
 263       cursor_window_controller_(new CursorWindowController()),
 264       mirror_window_controller_(new MirrorWindowController()),
 265       weak_ptr_factory_(this) {
 266 #if defined(OS_CHROMEOS)
 267   if (base::SysInfo::IsRunningOnChromeOS())
 268     limiter_.reset(new DisplayChangeLimiter);
 269 #endif
 270   // Reset primary display to make sure that tests don't use
 271   // stale display info from previous tests.
 272   primary_display_id = gfx::Display::kInvalidDisplayID;
 273 }
 274
 275 DisplayController::~DisplayController() {
 276 }
 277
 278 void DisplayController::Start() {
 279   Shell::GetScreen()->AddObserver(this);
 280   Shell::GetInstance()->display_manager()->set_delegate(this);
 281 }
 282
 283 void DisplayController::Shutdown() {
 284   // Unset the display manager's delegate here because
 285   // DisplayManager outlives DisplayController.
 286   Shell::GetInstance()->display_manager()->set_delegate(NULL);
 287
 288   cursor_window_controller_.reset();
 289   mirror_window_controller_.reset();
 290
 291   Shell::GetScreen()->RemoveObserver(this);
 292
 293   int64 primary_id = Shell::GetScreen()->GetPrimaryDisplay().id();
 294
 295   // Delete non primary root window controllers first, then
 296   // delete the primary root window controller.
 297   aura::Window::Windows root_windows = DisplayController::GetAllRootWindows();
 298   std::vector<RootWindowController*> to_delete;
 299   RootWindowController* primary_rwc = NULL;
 300   for (aura::Window::Windows::iterator iter = root_windows.begin();
 301        iter != root_windows.end();
 302        ++iter) {
 303     RootWindowController* rwc = GetRootWindowController(*iter);
 304     if (GetRootWindowSettings(*iter)->display_id == primary_id)
 305       primary_rwc = rwc;
 306     else
 307       to_delete.push_back(rwc);
 308   }
 309   CHECK(primary_rwc);
 310
 311   STLDeleteElements(&to_delete);
 312   delete primary_rwc;
 313 }
 314
 315 void DisplayController::CreatePrimaryHost(
 316     const AshWindowTreeHostInitParams& init_params) {
 317   const gfx::Display& primary_candidate =
 318       GetDisplayManager()->GetPrimaryDisplayCandidate();
 319   primary_display_id = primary_candidate.id();
 320   CHECK_NE(gfx::Display::kInvalidDisplayID, primary_display_id);
 321   AddWindowTreeHostForDisplay(primary_candidate, init_params);
 322 }
 323
 324 void DisplayController::InitDisplays() {
 325   RootWindowController::CreateForPrimaryDisplay(
 326       window_tree_hosts_[primary_display_id]);
 327
 328   DisplayManager* display_manager = GetDisplayManager();
 329   for (size_t i = 0; i < display_manager->GetNumDisplays(); ++i) {
 330     const gfx::Display& display = display_manager->GetDisplayAt(i);
 331     if (primary_display_id != display.id()) {
 332       AshWindowTreeHost* ash_host = AddWindowTreeHostForDisplay(
 333           display, AshWindowTreeHostInitParams());
 334       RootWindowController::CreateForSecondaryDisplay(ash_host);
 335     }
 336   }
 337   UpdateHostWindowNames();
 338
 339   FOR_EACH_OBSERVER(Observer, observers_, OnDisplaysInitialized());
 340 }
 341
 342 void DisplayController::AddObserver(Observer* observer) {
 343   observers_.AddObserver(observer);
 344 }
 345
 346 void DisplayController::RemoveObserver(Observer* observer) {
 347   observers_.RemoveObserver(observer);
 348 }
 349
 350 // static
 351 int64 DisplayController::GetPrimaryDisplayId() {
 352   CHECK_NE(gfx::Display::kInvalidDisplayID, primary_display_id);
 353   return primary_display_id;
 354 }
 355
 356 aura::Window* DisplayController::GetPrimaryRootWindow() {
 357   return GetRootWindowForDisplayId(primary_display_id);
 358 }
 359
 360 aura::Window* DisplayController::GetRootWindowForDisplayId(int64 id) {
 361   CHECK_EQ(1u, window_tree_hosts_.count(id));
 362   AshWindowTreeHost* host = window_tree_hosts_[id];
 363   CHECK(host);
 364   return GetWindow(host);
 365 }
 366
 367 void DisplayController::CloseChildWindows() {
 368   for (WindowTreeHostMap::const_iterator it = window_tree_hosts_.begin();
 369        it != window_tree_hosts_.end();
 370        ++it) {
 371     aura::Window* root_window = GetWindow(it->second);
 372     RootWindowController* controller = GetRootWindowController(root_window);
 373     if (controller) {
 374       controller->CloseChildWindows();
 375     } else {
 376       while (!root_window->children().empty()) {
 377         aura::Window* child = root_window->children()[0];
 378         delete child;
 379       }
 380     }
 381   }
 382 }
 383
 384 aura::Window::Windows DisplayController::GetAllRootWindows() {
 385   aura::Window::Windows windows;
 386   for (WindowTreeHostMap::const_iterator it = window_tree_hosts_.begin();
 387        it != window_tree_hosts_.end();
 388        ++it) {
 389     DCHECK(it->second);
 390     if (GetRootWindowController(GetWindow(it->second)))
 391       windows.push_back(GetWindow(it->second));
 392   }
 393   return windows;
 394 }
 395
 396 gfx::Insets DisplayController::GetOverscanInsets(int64 display_id) const {
 397   return GetDisplayManager()->GetOverscanInsets(display_id);
 398 }
 399
 400 void DisplayController::SetOverscanInsets(int64 display_id,
 401                                           const gfx::Insets& insets_in_dip) {
 402   GetDisplayManager()->SetOverscanInsets(display_id, insets_in_dip);
 403 }
 404
 405 std::vector<RootWindowController*>
 406 DisplayController::GetAllRootWindowControllers() {
 407   std::vector<RootWindowController*> controllers;
 408   for (WindowTreeHostMap::const_iterator it = window_tree_hosts_.begin();
 409        it != window_tree_hosts_.end();
 410        ++it) {
 411     RootWindowController* controller =
 412         GetRootWindowController(GetWindow(it->second));
 413     if (controller)
 414       controllers.push_back(controller);
 415   }
 416   return controllers;
 417 }
 418
 419 void DisplayController::ToggleMirrorMode() {
 420   DisplayManager* display_manager = GetDisplayManager();
 421   if (display_manager->num_connected_displays() <= 1)
 422     return;
 423
 424   if (limiter_) {
 425     if  (limiter_->IsThrottled())
 426       return;
 427     limiter_->SetThrottleTimeout(kCycleDisplayThrottleTimeoutMs);
 428   }
 429 #if defined(OS_CHROMEOS)
 430   Shell* shell = Shell::GetInstance();
 431   DisplayConfiguratorAnimation* animation =
 432       shell->display_configurator_animation();
 433   animation->StartFadeOutAnimation(
 434       base::Bind(&DisplayController::SetMirrorModeAfterAnimation,
 435                  weak_ptr_factory_.GetWeakPtr(),
 436                  !display_manager->IsMirrored()));
 437 #endif
 438 }
 439
 440 void DisplayController::SwapPrimaryDisplay() {
 441   if (limiter_) {
 442     if  (limiter_->IsThrottled())
 443       return;
 444     limiter_->SetThrottleTimeout(kSwapDisplayThrottleTimeoutMs);
 445   }
 446
 447   if (Shell::GetScreen()->GetNumDisplays() > 1) {
 448 #if defined(OS_CHROMEOS)
 449     DisplayConfiguratorAnimation* animation =
 450         Shell::GetInstance()->display_configurator_animation();
 451     if (animation) {
 452       animation->StartFadeOutAnimation(base::Bind(
 453           &DisplayController::OnFadeOutForSwapDisplayFinished,
 454           weak_ptr_factory_.GetWeakPtr()));
 455     } else {
 456       SetPrimaryDisplay(ScreenUtil::GetSecondaryDisplay());
 457     }
 458 #else
 459     SetPrimaryDisplay(ScreenUtil::GetSecondaryDisplay());
 460 #endif
 461   }
 462 }
 463
 464 void DisplayController::SetPrimaryDisplayId(int64 id) {
 465   DCHECK_NE(gfx::Display::kInvalidDisplayID, id);
 466   if (id == gfx::Display::kInvalidDisplayID || primary_display_id == id)
 467     return;
 468
 469   const gfx::Display& display = GetDisplayManager()->GetDisplayForId(id);
 470   if (display.is_valid())
 471     SetPrimaryDisplay(display);
 472 }
 473
 474 void DisplayController::SetPrimaryDisplay(
 475     const gfx::Display& new_primary_display) {
 476   DisplayManager* display_manager = GetDisplayManager();
 477   DCHECK(new_primary_display.is_valid());
 478   DCHECK(display_manager->IsActiveDisplay(new_primary_display));
 479
 480   if (!new_primary_display.is_valid() ||
 481       !display_manager->IsActiveDisplay(new_primary_display)) {
 482     LOG(ERROR) << "Invalid or non-existent display is requested:"
 483                << new_primary_display.ToString();
 484     return;
 485   }
 486
 487   if (primary_display_id == new_primary_display.id() ||
 488       window_tree_hosts_.size() < 2) {
 489     return;
 490   }
 491
 492   AshWindowTreeHost* non_primary_host =
 493       window_tree_hosts_[new_primary_display.id()];
 494   LOG_IF(ERROR, !non_primary_host)
 495       << "Unknown display is requested in SetPrimaryDisplay: id="
 496       << new_primary_display.id();
 497   if (!non_primary_host)
 498     return;
 499
 500   gfx::Display old_primary_display = Shell::GetScreen()->GetPrimaryDisplay();
 501
 502   // Swap root windows between current and new primary display.
 503   AshWindowTreeHost* primary_host = window_tree_hosts_[primary_display_id];
 504   CHECK(primary_host);
 505   CHECK_NE(primary_host, non_primary_host);
 506
 507   window_tree_hosts_[new_primary_display.id()] = primary_host;
 508   GetRootWindowSettings(GetWindow(primary_host))->display_id =
 509       new_primary_display.id();
 510
 511   window_tree_hosts_[old_primary_display.id()] = non_primary_host;
 512   GetRootWindowSettings(GetWindow(non_primary_host))->display_id =
 513       old_primary_display.id();
 514
 515   primary_display_id = new_primary_display.id();
 516   GetDisplayManager()->layout_store()->UpdatePrimaryDisplayId(
 517       display_manager->GetCurrentDisplayIdPair(), primary_display_id);
 518
 519   UpdateWorkAreaOfDisplayNearestWindow(GetWindow(primary_host),
 520                                        old_primary_display.GetWorkAreaInsets());
 521   UpdateWorkAreaOfDisplayNearestWindow(GetWindow(non_primary_host),
 522                                        new_primary_display.GetWorkAreaInsets());
 523
 524   // Update the dispay manager with new display info.
 525   std::vector<DisplayInfo> display_info_list;
 526   display_info_list.push_back(display_manager->GetDisplayInfo(
 527       primary_display_id));
 528   display_info_list.push_back(display_manager->GetDisplayInfo(
 529       ScreenUtil::GetSecondaryDisplay().id()));
 530   GetDisplayManager()->set_force_bounds_changed(true);
 531   GetDisplayManager()->UpdateDisplays(display_info_list);
 532   GetDisplayManager()->set_force_bounds_changed(false);
 533 }
 534
 535 void DisplayController::EnsurePointerInDisplays() {
 536   // If the mouse is currently on a display in native location,
 537   // use the same native location. Otherwise find the display closest
 538   // to the current cursor location in screen coordinates.
 539
 540   gfx::Point point_in_screen = Shell::GetScreen()->GetCursorScreenPoint();
 541   gfx::Point target_location_in_native;
 542   int64 closest_distance_squared = -1;
 543   DisplayManager* display_manager = GetDisplayManager();
 544
 545   aura::Window* dst_root_window = NULL;
 546   for (size_t i = 0; i < display_manager->GetNumDisplays(); ++i) {
 547     const gfx::Display& display = display_manager->GetDisplayAt(i);
 548     const DisplayInfo display_info =
 549         display_manager->GetDisplayInfo(display.id());
 550     aura::Window* root_window = GetRootWindowForDisplayId(display.id());
 551     if (display_info.bounds_in_native().Contains(
 552             cursor_location_in_native_coords_for_restore_)) {
 553       dst_root_window = root_window;
 554       target_location_in_native = cursor_location_in_native_coords_for_restore_;
 555       break;
 556     }
 557     gfx::Point center = display.bounds().CenterPoint();
 558     // Use the distance squared from the center of the dislay. This is not
 559     // exactly "closest" display, but good enough to pick one
 560     // appropriate (and there are at most two displays).
 561     // We don't care about actual distance, only relative to other displays, so
 562     // using the LengthSquared() is cheaper than Length().
 563
 564     int64 distance_squared = (center - point_in_screen).LengthSquared();
 565     if (closest_distance_squared < 0 ||
 566         closest_distance_squared > distance_squared) {
 567       aura::Window* root_window = GetRootWindowForDisplayId(display.id());
 568       aura::client::ScreenPositionClient* client =
 569           aura::client::GetScreenPositionClient(root_window);
 570       client->ConvertPointFromScreen(root_window, &center);
 571       root_window->GetHost()->ConvertPointToNativeScreen(&center);
 572       dst_root_window = root_window;
 573       target_location_in_native = center;
 574       closest_distance_squared = distance_squared;
 575     }
 576   }
 577   dst_root_window->GetHost()->ConvertPointFromNativeScreen(
 578       &target_location_in_native);
 579   dst_root_window->MoveCursorTo(target_location_in_native);
 580 }
 581
 582 bool DisplayController::UpdateWorkAreaOfDisplayNearestWindow(
 583     const aura::Window* window,
 584     const gfx::Insets& insets) {
 585   const aura::Window* root_window = window->GetRootWindow();
 586   int64 id = GetRootWindowSettings(root_window)->display_id;
 587   // if id is |kInvaildDisplayID|, it's being deleted.
 588   DCHECK(id != gfx::Display::kInvalidDisplayID);
 589   return GetDisplayManager()->UpdateWorkAreaOfDisplay(id, insets);
 590 }
 591
 592 void DisplayController::OnDisplayAdded(const gfx::Display& display) {
 593   if (primary_tree_host_for_replace_) {
 594     DCHECK(window_tree_hosts_.empty());
 595     primary_display_id = display.id();
 596     window_tree_hosts_[display.id()] = primary_tree_host_for_replace_;
 597     GetRootWindowSettings(GetWindow(primary_tree_host_for_replace_))
 598         ->display_id = display.id();
 599     primary_tree_host_for_replace_ = NULL;
 600     const DisplayInfo& display_info =
 601         GetDisplayManager()->GetDisplayInfo(display.id());
 602     AshWindowTreeHost* ash_host = window_tree_hosts_[display.id()];
 603     ash_host->AsWindowTreeHost()->SetBounds(display_info.bounds_in_native());
 604     SetDisplayPropertiesOnHost(ash_host, display);
 605   } else {
 606     if (primary_display_id == gfx::Display::kInvalidDisplayID)
 607       primary_display_id = display.id();
 608     DCHECK(!window_tree_hosts_.empty());
 609     AshWindowTreeHost* ash_host = AddWindowTreeHostForDisplay(
 610         display, AshWindowTreeHostInitParams());
 611     RootWindowController::CreateForSecondaryDisplay(ash_host);
 612   }
 613 }
 614
 615 void DisplayController::OnDisplayRemoved(const gfx::Display& display) {
 616   AshWindowTreeHost* host_to_delete = window_tree_hosts_[display.id()];
 617   CHECK(host_to_delete) << display.ToString();
 618
 619   // Display for root window will be deleted when the Primary RootWindow
 620   // is deleted by the Shell.
 621   window_tree_hosts_.erase(display.id());
 622
 623   // When the primary root window's display is removed, move the primary
 624   // root to the other display.
 625   if (primary_display_id == display.id()) {
 626     // Temporarily store the primary root window in
 627     // |primary_root_window_for_replace_| when replacing the display.
 628     if (window_tree_hosts_.size() == 0) {
 629       primary_display_id = gfx::Display::kInvalidDisplayID;
 630       primary_tree_host_for_replace_ = host_to_delete;
 631       return;
 632     }
 633     DCHECK_EQ(1U, window_tree_hosts_.size());
 634     primary_display_id = ScreenUtil::GetSecondaryDisplay().id();
 635     AshWindowTreeHost* primary_host = host_to_delete;
 636
 637     // Delete the other host instead.
 638     host_to_delete = window_tree_hosts_[primary_display_id];
 639     GetRootWindowSettings(GetWindow(host_to_delete))->display_id = display.id();
 640
 641     // Setup primary root.
 642     window_tree_hosts_[primary_display_id] = primary_host;
 643     GetRootWindowSettings(GetWindow(primary_host))->display_id =
 644         primary_display_id;
 645
 646     OnDisplayMetricsChanged(
 647         GetDisplayManager()->GetDisplayForId(primary_display_id),
 648         DISPLAY_METRIC_BOUNDS);
 649   }
 650   ClearDisplayPropertiesOnHost(host_to_delete, display);
 651   RootWindowController* controller =
 652       GetRootWindowController(GetWindow(host_to_delete));
 653   DCHECK(controller);
 654   controller->MoveWindowsTo(GetPrimaryRootWindow());
 655   // Delete most of root window related objects, but don't delete
 656   // root window itself yet because the stack may be using it.
 657   controller->Shutdown();
 658   base::MessageLoop::current()->DeleteSoon(FROM_HERE, controller);
 659 }
 660
 661 void DisplayController::OnDisplayMetricsChanged(const gfx::Display& display,
 662                                                 uint32_t metrics) {
 663   if (!(metrics & (DISPLAY_METRIC_BOUNDS | DISPLAY_METRIC_ROTATION |
 664                    DISPLAY_METRIC_DEVICE_SCALE_FACTOR)))
 665     return;
 666   const DisplayInfo& display_info =
 667       GetDisplayManager()->GetDisplayInfo(display.id());
 668   DCHECK(!display_info.bounds_in_native().IsEmpty());
 669   AshWindowTreeHost* ash_host = window_tree_hosts_[display.id()];
 670   ash_host->AsWindowTreeHost()->SetBounds(display_info.bounds_in_native());
 671   SetDisplayPropertiesOnHost(ash_host, display);
 672 }
 673
 674 void DisplayController::OnHostResized(const aura::WindowTreeHost* host) {
 675   gfx::Display display = Shell::GetScreen()->GetDisplayNearestWindow(
 676       const_cast<aura::Window*>(host->window()));
 677
 678   DisplayManager* display_manager = GetDisplayManager();
 679   if (display_manager->UpdateDisplayBounds(display.id(), host->GetBounds())) {
 680     mirror_window_controller_->UpdateWindow();
 681     cursor_window_controller_->UpdateContainer();
 682   }
 683 }
 684
 685 void DisplayController::CreateOrUpdateMirroringDisplay(
 686     const DisplayInfo& info) {
 687   switch (GetDisplayManager()->second_display_mode()) {
 688     case DisplayManager::MIRRORING:
 689       mirror_window_controller_->UpdateWindow(info);
 690       cursor_window_controller_->UpdateContainer();
 691       break;
 692     case DisplayManager::EXTENDED:
 693       NOTREACHED();
 694   }
 695 }
 696
 697 void DisplayController::CloseMirroringDisplay() {
 698   mirror_window_controller_->Close();
 699   // If cursor_compositing is enabled for large cursor, the cursor window is
 700   // always on the desktop display (the visible cursor on the non-desktop
 701   // display is drawn through compositor mirroring). Therefore, it's unnecessary
 702   // to handle the cursor_window at all. See: http://crbug.com/412910
 703   if (!cursor_window_controller_->is_cursor_compositing_enabled())
 704     cursor_window_controller_->UpdateContainer();
 705 }
 706
 707 void DisplayController::PreDisplayConfigurationChange(bool clear_focus) {
 708   FOR_EACH_OBSERVER(Observer, observers_, OnDisplayConfigurationChanging());
 709   focus_activation_store_->Store(clear_focus);
 710   gfx::Screen* screen = Shell::GetScreen();
 711   gfx::Point point_in_screen = screen->GetCursorScreenPoint();
 712   gfx::Display display = screen->GetDisplayNearestPoint(point_in_screen);
 713   aura::Window* root_window = GetRootWindowForDisplayId(display.id());
 714
 715   aura::client::ScreenPositionClient* client =
 716       aura::client::GetScreenPositionClient(root_window);
 717   client->ConvertPointFromScreen(root_window, &point_in_screen);
 718   root_window->GetHost()->ConvertPointToNativeScreen(&point_in_screen);
 719   cursor_location_in_native_coords_for_restore_ = point_in_screen;
 720 }
 721
 722 void DisplayController::PostDisplayConfigurationChange() {
 723   if (limiter_)
 724     limiter_->SetThrottleTimeout(kAfterDisplayChangeThrottleTimeoutMs);
 725
 726   focus_activation_store_->Restore();
 727
 728   DisplayManager* display_manager = GetDisplayManager();
 729   DisplayLayoutStore* layout_store = display_manager->layout_store();
 730   if (display_manager->num_connected_displays() > 1) {
 731     DisplayIdPair pair = display_manager->GetCurrentDisplayIdPair();
 732     layout_store->UpdateMirrorStatus(pair, display_manager->IsMirrored());
 733     DisplayLayout layout = layout_store->GetRegisteredDisplayLayout(pair);
 734
 735     if (Shell::GetScreen()->GetNumDisplays() > 1 ) {
 736       int64 primary_id = layout.primary_id;
 737       SetPrimaryDisplayId(
 738           primary_id == gfx::Display::kInvalidDisplayID ?
 739           pair.first : primary_id);
 740       // Update the primary_id in case the above call is
 741       // ignored. Happens when a) default layout's primary id
 742       // doesn't exist, or b) the primary_id has already been
 743       // set to the same and didn't update it.
 744       layout_store->UpdatePrimaryDisplayId(
 745           pair, Shell::GetScreen()->GetPrimaryDisplay().id());
 746     }
 747   }
 748   FOR_EACH_OBSERVER(Observer, observers_, OnDisplayConfigurationChanged());
 749   UpdateHostWindowNames();
 750   EnsurePointerInDisplays();
 751 }
 752
 753 AshWindowTreeHost* DisplayController::AddWindowTreeHostForDisplay(
 754     const gfx::Display& display,
 755     const AshWindowTreeHostInitParams& init_params) {
 756   static int host_count = 0;
 757   const DisplayInfo& display_info =
 758       GetDisplayManager()->GetDisplayInfo(display.id());
 759   AshWindowTreeHostInitParams params_with_bounds(init_params);
 760   params_with_bounds.initial_bounds = display_info.bounds_in_native();
 761   AshWindowTreeHost* ash_host = AshWindowTreeHost::Create(params_with_bounds);
 762   aura::WindowTreeHost* host = ash_host->AsWindowTreeHost();
 763
 764   host->window()->SetName(base::StringPrintf("RootWindow-%d", host_count++));
 765   host->window()->SetTitle(base::UTF8ToUTF16(display_info.name()));
 766   host->compositor()->SetBackgroundColor(SK_ColorBLACK);
 767   // No need to remove our observer observer because the DisplayController
 768   // outlives the host.
 769   host->AddObserver(this);
 770   InitRootWindowSettings(host->window())->display_id = display.id();
 771   host->InitHost();
 772
 773   window_tree_hosts_[display.id()] = ash_host;
 774   SetDisplayPropertiesOnHost(ash_host, display);
 775
 776 #if defined(OS_CHROMEOS)
 777   static bool force_constrain_pointer_to_root =
 778       base::CommandLine::ForCurrentProcess()->HasSwitch(
 779           switches::kAshConstrainPointerToRoot);
 780   if (base::SysInfo::IsRunningOnChromeOS() || force_constrain_pointer_to_root)
 781     ash_host->ConfineCursorToRootWindow();
 782 #endif
 783   return ash_host;
 784 }
 785
 786 void DisplayController::OnFadeOutForSwapDisplayFinished() {
 787 #if defined(OS_CHROMEOS)
 788   SetPrimaryDisplay(ScreenUtil::GetSecondaryDisplay());
 789   Shell::GetInstance()->display_configurator_animation()
 790       ->StartFadeInAnimation();
 791 #endif
 792 }
 793
 794 void DisplayController::SetMirrorModeAfterAnimation(bool mirror) {
 795   GetDisplayManager()->SetMirrorMode(mirror);
 796 }
 797
 798 void DisplayController::UpdateHostWindowNames() {
 799 #if defined(USE_X11)
 800   // crbug.com/120229 - set the window title for the primary dislpay
 801   // to "aura_root_0" so gtalk can find the primary root window to broadcast.
 802   // TODO(jhorwich) Remove this once Chrome supports window-based broadcasting.
 803   aura::Window* primary = Shell::GetPrimaryRootWindow();
 804   aura::Window::Windows root_windows = Shell::GetAllRootWindows();
 805   for (size_t i = 0; i < root_windows.size(); ++i) {
 806     std::string name =
 807         root_windows[i] == primary ? "aura_root_0" : "aura_root_x";
 808     gfx::AcceleratedWidget xwindow =
 809         root_windows[i]->GetHost()->GetAcceleratedWidget();
 810     XStoreName(gfx::GetXDisplay(), xwindow, name.c_str());
 811   }
 812 #endif
 813 }
 814
 815 }  // namespace ash