ash/display/display_manager.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_manager.h"
   6
   7 #include <algorithm>
   8 #include <cmath>
   9 #include <set>
  10 #include <string>
  11 #include <utility>
  12 #include <vector>
  13
  14 #include "ash/ash_switches.h"
  15 #include "ash/display/display_layout_store.h"
  16 #include "ash/display/display_util.h"
  17 #include "ash/display/extended_mouse_warp_controller.h"
  18 #include "ash/display/null_mouse_warp_controller.h"
  19 #include "ash/display/screen_ash.h"
  20 #include "ash/display/unified_mouse_warp_controller.h"
  21 #include "ash/screen_util.h"
  22 #include "ash/shell.h"
  23 #include "base/auto_reset.h"
  24 #include "base/command_line.h"
  25 #include "base/logging.h"
  26 #include "base/metrics/histogram.h"
  27 #include "base/run_loop.h"
  28 #include "base/strings/string_number_conversions.h"
  29 #include "base/strings/string_split.h"
  30 #include "base/strings/stringprintf.h"
  31 #include "base/strings/utf_string_conversions.h"
  32 #include "grit/ash_strings.h"
  33 #include "ui/base/l10n/l10n_util.h"
  34 #include "ui/gfx/display.h"
  35 #include "ui/gfx/display_observer.h"
  36 #include "ui/gfx/font_render_params.h"
  37 #include "ui/gfx/geometry/rect.h"
  38 #include "ui/gfx/geometry/size_conversions.h"
  39 #include "ui/gfx/screen.h"
  40
  41 #if defined(USE_X11)
  42 #include "ui/base/x/x11_util.h"
  43 #endif
  44
  45 #if defined(OS_CHROMEOS)
  46 #include "ash/display/display_configurator_animation.h"
  47 #include "base/sys_info.h"
  48 #endif
  49
  50 #if defined(OS_WIN)
  51 #include "base/win/windows_version.h"
  52 #endif
  53
  54 namespace ash {
  55 typedef std::vector<gfx::Display> DisplayList;
  56 typedef std::vector<DisplayInfo> DisplayInfoList;
  57
  58 namespace {
  59
  60 // We need to keep this in order for unittests to tell if
  61 // the object in gfx::Screen::GetScreenByType is for shutdown.
  62 gfx::Screen* screen_for_shutdown = NULL;
  63
  64 // The number of pixels to overlap between the primary and secondary displays,
  65 // in case that the offset value is too large.
  66 const int kMinimumOverlapForInvalidOffset = 100;
  67
  68 struct DisplaySortFunctor {
  69   bool operator()(const gfx::Display& a, const gfx::Display& b) {
  70     return CompareDisplayIds(a.id(), b.id());
  71   }
  72 };
  73
  74 struct DisplayInfoSortFunctor {
  75   bool operator()(const DisplayInfo& a, const DisplayInfo& b) {
  76     return CompareDisplayIds(a.id(), b.id());
  77   }
  78 };
  79
  80 gfx::Display& GetInvalidDisplay() {
  81   static gfx::Display* invalid_display = new gfx::Display();
  82   return *invalid_display;
  83 }
  84
  85 std::vector<DisplayMode>::const_iterator FindDisplayMode(
  86     const DisplayInfo& info,
  87     const DisplayMode& target_mode) {
  88   const std::vector<DisplayMode>& modes = info.display_modes();
  89   return std::find_if(modes.begin(), modes.end(),
  90                       [target_mode](const DisplayMode& mode) {
  91                         return target_mode.IsEquivalent(mode);
  92                       });
  93 }
  94
  95 void SetInternalDisplayModeList(DisplayInfo* info) {
  96   DisplayMode native_mode;
  97   native_mode.size = info->bounds_in_native().size();
  98   native_mode.device_scale_factor = info->device_scale_factor();
  99   native_mode.ui_scale = 1.0f;
 100   info->SetDisplayModes(CreateInternalDisplayModeList(native_mode));
 101 }
 102
 103 void MaybeInitInternalDisplay(DisplayInfo* info) {
 104   int64 id = info->id();
 105   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
 106   if (command_line->HasSwitch(switches::kAshUseFirstDisplayAsInternal)) {
 107     gfx::Display::SetInternalDisplayId(id);
 108     SetInternalDisplayModeList(info);
 109   }
 110 }
 111
 112 gfx::Size GetMaxNativeSize(const DisplayInfo& info) {
 113   gfx::Size size;
 114   for (auto& mode : info.display_modes()) {
 115     if (mode.size.GetArea() > size.GetArea())
 116       size = mode.size;
 117   }
 118   return size;
 119 }
 120
 121 }  // namespace
 122
 123 using std::string;
 124 using std::vector;
 125
 126 // static
 127 int64 DisplayManager::kUnifiedDisplayId = -10;
 128
 129 DisplayManager::DisplayManager()
 130     : delegate_(NULL),
 131       screen_(new ScreenAsh),
 132       layout_store_(new DisplayLayoutStore),
 133       first_display_id_(gfx::Display::kInvalidDisplayID),
 134       num_connected_displays_(0),
 135       force_bounds_changed_(false),
 136       change_display_upon_host_resize_(false),
 137       multi_display_mode_(EXTENDED),
 138       current_default_multi_display_mode_(EXTENDED),
 139       mirroring_display_id_(gfx::Display::kInvalidDisplayID),
 140       registered_internal_display_rotation_lock_(false),
 141       registered_internal_display_rotation_(gfx::Display::ROTATE_0),
 142       unified_desktop_enabled_(false),
 143       weak_ptr_factory_(this) {
 144 #if defined(OS_CHROMEOS)
 145   change_display_upon_host_resize_ = !base::SysInfo::IsRunningOnChromeOS();
 146   unified_desktop_enabled_ = base::CommandLine::ForCurrentProcess()->HasSwitch(
 147       switches::kAshEnableUnifiedDesktop);
 148 #endif
 149   gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_ALTERNATE, screen_.get());
 150   gfx::Screen* current_native =
 151       gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_NATIVE);
 152   // If there is no native, or the native was for shutdown,
 153   // use ash's screen.
 154   if (!current_native ||
 155       current_native == screen_for_shutdown) {
 156     gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, screen_.get());
 157   }
 158 }
 159
 160 DisplayManager::~DisplayManager() {
 161 #if defined(OS_CHROMEOS)
 162   // Reset the font params.
 163   gfx::SetFontRenderParamsDeviceScaleFactor(1.0f);
 164 #endif
 165 }
 166
 167 bool DisplayManager::InitFromCommandLine() {
 168   DisplayInfoList info_list;
 169   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
 170   if (!command_line->HasSwitch(switches::kAshHostWindowBounds))
 171     return false;
 172   const string size_str =
 173       command_line->GetSwitchValueASCII(switches::kAshHostWindowBounds);
 174   for (const std::string& part : base::SplitString(
 175            size_str, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL)) {
 176     info_list.push_back(DisplayInfo::CreateFromSpec(part));
 177     info_list.back().set_native(true);
 178   }
 179   MaybeInitInternalDisplay(&info_list[0]);
 180   if (info_list.size() > 1 &&
 181       command_line->HasSwitch(switches::kAshEnableSoftwareMirroring)) {
 182     SetMultiDisplayMode(MIRRORING);
 183   }
 184   OnNativeDisplaysChanged(info_list);
 185   return true;
 186 }
 187
 188 void DisplayManager::InitDefaultDisplay() {
 189   DisplayInfoList info_list;
 190   info_list.push_back(DisplayInfo::CreateFromSpec(std::string()));
 191   info_list.back().set_native(true);
 192   MaybeInitInternalDisplay(&info_list[0]);
 193   OnNativeDisplaysChanged(info_list);
 194 }
 195
 196 void DisplayManager::RefreshFontParams() {
 197 #if defined(OS_CHROMEOS)
 198   // Use the largest device scale factor among currently active displays. Non
 199   // internal display may have bigger scale factor in case the external display
 200   // is an 4K display.
 201   float largest_device_scale_factor = 1.0f;
 202   for (const gfx::Display& display : active_display_list_) {
 203     const ash::DisplayInfo& info = display_info_[display.id()];
 204     largest_device_scale_factor = std::max(
 205         largest_device_scale_factor, info.GetEffectiveDeviceScaleFactor());
 206   }
 207   gfx::SetFontRenderParamsDeviceScaleFactor(largest_device_scale_factor);
 208 #endif  // OS_CHROMEOS
 209 }
 210
 211 DisplayLayout DisplayManager::GetCurrentDisplayLayout() {
 212   DCHECK_LE(2U, num_connected_displays());
 213   // Invert if the primary was swapped.
 214   if (num_connected_displays() == 2) {
 215     DisplayIdPair pair = GetCurrentDisplayIdPair();
 216     return layout_store_->ComputeDisplayLayoutForDisplayIdPair(pair);
 217   } else if (num_connected_displays() > 2) {
 218     // Return fixed horizontal layout for >= 3 displays.
 219     DisplayLayout layout(DisplayLayout::RIGHT, 0);
 220     return layout;
 221   }
 222   NOTREACHED() << "DisplayLayout is requested for single display";
 223   // On release build, just fallback to default instead of blowing up.
 224   DisplayLayout layout =
 225       layout_store_->default_display_layout();
 226   layout.primary_id = active_display_list_[0].id();
 227   return layout;
 228 }
 229
 230 DisplayIdPair DisplayManager::GetCurrentDisplayIdPair() const {
 231   if (IsInUnifiedMode()) {
 232     return CreateDisplayIdPair(software_mirroring_display_list_[0].id(),
 233                                software_mirroring_display_list_[1].id());
 234   } else if (IsInMirrorMode()) {
 235     if (software_mirroring_enabled()) {
 236       CHECK_EQ(2u, num_connected_displays());
 237       // This comment is to make it easy to distinguish the crash
 238       // between two checks.
 239       CHECK_EQ(1u, active_display_list_.size());
 240     }
 241     return CreateDisplayIdPair(active_display_list_[0].id(),
 242                                mirroring_display_id_);
 243   } else {
 244     CHECK_LE(2u, active_display_list_.size());
 245     return CreateDisplayIdPair(active_display_list_[0].id(),
 246                                active_display_list_[1].id());
 247   }
 248 }
 249
 250 void DisplayManager::SetLayoutForCurrentDisplays(
 251     const DisplayLayout& layout_relative_to_primary) {
 252   if (GetNumDisplays() != 2)
 253     return;
 254   const gfx::Display& primary = screen_->GetPrimaryDisplay();
 255   const DisplayIdPair pair = GetCurrentDisplayIdPair();
 256   // Invert if the primary was swapped.
 257   DisplayLayout to_set = pair.first == primary.id() ?
 258       layout_relative_to_primary : layout_relative_to_primary.Invert();
 259
 260   DisplayLayout current_layout =
 261       layout_store_->GetRegisteredDisplayLayout(pair);
 262   if (to_set.position != current_layout.position ||
 263       to_set.offset != current_layout.offset) {
 264     to_set.primary_id = primary.id();
 265     layout_store_->RegisterLayoutForDisplayIdPair(
 266         pair.first, pair.second, to_set);
 267     if (delegate_)
 268       delegate_->PreDisplayConfigurationChange(false);
 269     // PreDisplayConfigurationChange(false);
 270     // TODO(oshima): Call UpdateDisplays instead.
 271     const DisplayLayout layout = GetCurrentDisplayLayout();
 272     UpdateDisplayBoundsForLayout(
 273         layout, primary,
 274         FindDisplayForId(ScreenUtil::GetSecondaryDisplay().id()));
 275
 276     // Primary's bounds stay the same. Just notify bounds change
 277     // on the secondary.
 278     screen_->NotifyMetricsChanged(
 279         ScreenUtil::GetSecondaryDisplay(),
 280         gfx::DisplayObserver::DISPLAY_METRIC_BOUNDS |
 281             gfx::DisplayObserver::DISPLAY_METRIC_WORK_AREA);
 282     if (delegate_)
 283       delegate_->PostDisplayConfigurationChange();
 284   }
 285 }
 286
 287 const gfx::Display& DisplayManager::GetDisplayForId(int64 id) const {
 288   gfx::Display* display =
 289       const_cast<DisplayManager*>(this)->FindDisplayForId(id);
 290   return display ? *display : GetInvalidDisplay();
 291 }
 292
 293 const gfx::Display& DisplayManager::FindDisplayContainingPoint(
 294     const gfx::Point& point_in_screen) const {
 295   int index =
 296       FindDisplayIndexContainingPoint(active_display_list_, point_in_screen);
 297   return index < 0 ? GetInvalidDisplay() : active_display_list_[index];
 298 }
 299
 300 bool DisplayManager::UpdateWorkAreaOfDisplay(int64 display_id,
 301                                              const gfx::Insets& insets) {
 302   gfx::Display* display = FindDisplayForId(display_id);
 303   DCHECK(display);
 304   gfx::Rect old_work_area = display->work_area();
 305   display->UpdateWorkAreaFromInsets(insets);
 306   return old_work_area != display->work_area();
 307 }
 308
 309 void DisplayManager::SetOverscanInsets(int64 display_id,
 310                                        const gfx::Insets& insets_in_dip) {
 311   bool update = false;
 312   DisplayInfoList display_info_list;
 313   for (const auto& display : active_display_list_) {
 314     DisplayInfo info = GetDisplayInfo(display.id());
 315     if (info.id() == display_id) {
 316       if (insets_in_dip.empty()) {
 317         info.set_clear_overscan_insets(true);
 318       } else {
 319         info.set_clear_overscan_insets(false);
 320         info.SetOverscanInsets(insets_in_dip);
 321       }
 322       update = true;
 323     }
 324     display_info_list.push_back(info);
 325   }
 326   if (update) {
 327     AddMirrorDisplayInfoIfAny(&display_info_list);
 328     UpdateDisplays(display_info_list);
 329   } else {
 330     display_info_[display_id].SetOverscanInsets(insets_in_dip);
 331   }
 332 }
 333
 334 void DisplayManager::SetDisplayRotation(int64 display_id,
 335                                         gfx::Display::Rotation rotation,
 336                                         gfx::Display::RotationSource source) {
 337   if (IsInUnifiedMode())
 338     return;
 339
 340   DisplayInfoList display_info_list;
 341   bool is_active = false;
 342   for (const auto& display : active_display_list_) {
 343     DisplayInfo info = GetDisplayInfo(display.id());
 344     if (info.id() == display_id) {
 345       if (info.GetRotation(source) == rotation &&
 346           info.GetActiveRotation() == rotation) {
 347         return;
 348       }
 349       info.SetRotation(rotation, source);
 350       is_active = true;
 351     }
 352     display_info_list.push_back(info);
 353   }
 354   if (is_active) {
 355     AddMirrorDisplayInfoIfAny(&display_info_list);
 356     UpdateDisplays(display_info_list);
 357   } else if (display_info_.find(display_id) != display_info_.end()) {
 358     // Inactive displays can reactivate, ensure they have been updated.
 359     display_info_[display_id].SetRotation(rotation, source);
 360   }
 361 }
 362
 363 bool DisplayManager::SetDisplayMode(int64 display_id,
 364                                     const DisplayMode& display_mode) {
 365   bool change_ui_scale = GetDisplayIdForUIScaling() == display_id;
 366
 367   DisplayInfoList display_info_list;
 368   bool display_property_changed = false;
 369   bool resolution_changed = false;
 370   for (const auto& display : active_display_list_) {
 371     DisplayInfo info = GetDisplayInfo(display.id());
 372     if (info.id() == display_id) {
 373       auto iter = FindDisplayMode(info, display_mode);
 374       if (iter == info.display_modes().end()) {
 375         LOG(WARNING) << "Unsupported display mode was requested:"
 376                      << "size=" << display_mode.size.ToString()
 377                      << ", ui scale=" << display_mode.ui_scale
 378                      << ", scale fator=" << display_mode.device_scale_factor;
 379         return false;
 380       }
 381
 382       if (change_ui_scale) {
 383         if (info.configured_ui_scale() == display_mode.ui_scale)
 384           return true;
 385         info.set_configured_ui_scale(display_mode.ui_scale);
 386         display_property_changed = true;
 387       } else {
 388         display_modes_[display_id] = *iter;
 389         if (info.bounds_in_native().size() != display_mode.size)
 390           resolution_changed = true;
 391         if (info.device_scale_factor() != display_mode.device_scale_factor) {
 392           info.set_device_scale_factor(display_mode.device_scale_factor);
 393           display_property_changed = true;
 394         }
 395       }
 396     }
 397     display_info_list.push_back(info);
 398   }
 399   if (display_property_changed) {
 400     AddMirrorDisplayInfoIfAny(&display_info_list);
 401     UpdateDisplays(display_info_list);
 402   }
 403   if (resolution_changed && IsInUnifiedMode()) {
 404     ReconfigureDisplays();
 405 #if defined(OS_CHROMEOS)
 406   } else if (resolution_changed && base::SysInfo::IsRunningOnChromeOS()) {
 407     Shell::GetInstance()->display_configurator()->OnConfigurationChanged();
 408 #endif
 409   }
 410   return resolution_changed || display_property_changed;
 411 }
 412
 413 void DisplayManager::RegisterDisplayProperty(
 414     int64 display_id,
 415     gfx::Display::Rotation rotation,
 416     float ui_scale,
 417     const gfx::Insets* overscan_insets,
 418     const gfx::Size& resolution_in_pixels,
 419     float device_scale_factor,
 420     ui::ColorCalibrationProfile color_profile) {
 421   if (display_info_.find(display_id) == display_info_.end())
 422     display_info_[display_id] = DisplayInfo(display_id, std::string(), false);
 423
 424   // Do not allow rotation in unified desktop mode.
 425   if (display_id == kUnifiedDisplayId)
 426     rotation = gfx::Display::ROTATE_0;
 427
 428   display_info_[display_id].SetRotation(rotation,
 429                                         gfx::Display::ROTATION_SOURCE_USER);
 430   display_info_[display_id].SetRotation(rotation,
 431                                         gfx::Display::ROTATION_SOURCE_ACTIVE);
 432   display_info_[display_id].SetColorProfile(color_profile);
 433   // Just in case the preference file was corrupted.
 434   // TODO(mukai): register |display_modes_| here as well, so the lookup for the
 435   // default mode in GetActiveModeForDisplayId() gets much simpler.
 436   if (0.5f <= ui_scale && ui_scale <= 2.0f)
 437     display_info_[display_id].set_configured_ui_scale(ui_scale);
 438   if (overscan_insets)
 439     display_info_[display_id].SetOverscanInsets(*overscan_insets);
 440   if (!resolution_in_pixels.IsEmpty()) {
 441     DCHECK(!gfx::Display::IsInternalDisplayId(display_id));
 442     // Default refresh rate, until OnNativeDisplaysChanged() updates us with the
 443     // actual display info, is 60 Hz.
 444     DisplayMode mode(resolution_in_pixels, 60.0f, false, false);
 445     mode.device_scale_factor = device_scale_factor;
 446     display_modes_[display_id] = mode;
 447   }
 448 }
 449
 450 DisplayMode DisplayManager::GetActiveModeForDisplayId(int64 display_id) const {
 451   DisplayMode selected_mode;
 452   if (GetSelectedModeForDisplayId(display_id, &selected_mode))
 453     return selected_mode;
 454
 455   // If 'selected' mode is empty, it should return the default mode. This means
 456   // the native mode for the external display. Unfortunately this is not true
 457   // for the internal display because restoring UI-scale doesn't register the
 458   // restored mode to |display_mode_|, so it needs to look up the mode whose
 459   // UI-scale value matches. See the TODO in RegisterDisplayProperty().
 460   const DisplayInfo& info = GetDisplayInfo(display_id);
 461
 462   for (auto& mode : info.display_modes()) {
 463     if (GetDisplayIdForUIScaling() == display_id) {
 464       if (info.configured_ui_scale() == mode.ui_scale)
 465         return mode;
 466     } else if (mode.native) {
 467       return mode;
 468     }
 469   }
 470   return selected_mode;
 471 }
 472
 473 void DisplayManager::RegisterDisplayRotationProperties(bool rotation_lock,
 474     gfx::Display::Rotation rotation) {
 475   if (delegate_)
 476     delegate_->PreDisplayConfigurationChange(false);
 477   registered_internal_display_rotation_lock_ = rotation_lock;
 478   registered_internal_display_rotation_ = rotation;
 479   if (delegate_)
 480     delegate_->PostDisplayConfigurationChange();
 481 }
 482
 483 bool DisplayManager::GetSelectedModeForDisplayId(int64 id,
 484                                                  DisplayMode* mode_out) const {
 485   std::map<int64, DisplayMode>::const_iterator iter = display_modes_.find(id);
 486   if (iter == display_modes_.end())
 487     return false;
 488   *mode_out = iter->second;
 489   return true;
 490 }
 491
 492 bool DisplayManager::IsDisplayUIScalingEnabled() const {
 493   return GetDisplayIdForUIScaling() != gfx::Display::kInvalidDisplayID;
 494 }
 495
 496 gfx::Insets DisplayManager::GetOverscanInsets(int64 display_id) const {
 497   std::map<int64, DisplayInfo>::const_iterator it =
 498       display_info_.find(display_id);
 499   return (it != display_info_.end()) ?
 500       it->second.overscan_insets_in_dip() : gfx::Insets();
 501 }
 502
 503 void DisplayManager::SetColorCalibrationProfile(
 504     int64 display_id,
 505     ui::ColorCalibrationProfile profile) {
 506 #if defined(OS_CHROMEOS)
 507   if (!display_info_[display_id].IsColorProfileAvailable(profile))
 508     return;
 509
 510   if (delegate_)
 511     delegate_->PreDisplayConfigurationChange(false);
 512   // Just sets color profile if it's not running on ChromeOS (like tests).
 513   if (!base::SysInfo::IsRunningOnChromeOS() ||
 514       Shell::GetInstance()->display_configurator()->SetColorCalibrationProfile(
 515           display_id, profile)) {
 516     display_info_[display_id].SetColorProfile(profile);
 517     UMA_HISTOGRAM_ENUMERATION(
 518         "ChromeOS.Display.ColorProfile", profile, ui::NUM_COLOR_PROFILES);
 519   }
 520   if (delegate_)
 521     delegate_->PostDisplayConfigurationChange();
 522 #endif
 523 }
 524
 525 void DisplayManager::OnNativeDisplaysChanged(
 526     const std::vector<DisplayInfo>& updated_displays) {
 527   if (updated_displays.empty()) {
 528     VLOG(1) << "OnNativeDisplaysChanged(0): # of current displays="
 529             << active_display_list_.size();
 530     // If the device is booted without display, or chrome is started
 531     // without --ash-host-window-bounds on linux desktop, use the
 532     // default display.
 533     if (active_display_list_.empty()) {
 534       std::vector<DisplayInfo> init_displays;
 535       init_displays.push_back(DisplayInfo::CreateFromSpec(std::string()));
 536       MaybeInitInternalDisplay(&init_displays[0]);
 537       OnNativeDisplaysChanged(init_displays);
 538     } else {
 539       // Otherwise don't update the displays when all displays are disconnected.
 540       // This happens when:
 541       // - the device is idle and powerd requested to turn off all displays.
 542       // - the device is suspended. (kernel turns off all displays)
 543       // - the internal display's brightness is set to 0 and no external
 544       //   display is connected.
 545       // - the internal display's brightness is 0 and external display is
 546       //   disconnected.
 547       // The display will be updated when one of displays is turned on, and the
 548       // display list will be updated correctly.
 549     }
 550     return;
 551   }
 552   first_display_id_ = updated_displays[0].id();
 553   std::set<gfx::Point> origins;
 554
 555   if (updated_displays.size() == 1) {
 556     VLOG(1) << "OnNativeDisplaysChanged(1):" << updated_displays[0].ToString();
 557   } else {
 558     VLOG(1) << "OnNativeDisplaysChanged(" << updated_displays.size()
 559             << ") [0]=" << updated_displays[0].ToString()
 560             << ", [1]=" << updated_displays[1].ToString();
 561   }
 562
 563   bool internal_display_connected = false;
 564   num_connected_displays_ = updated_displays.size();
 565   mirroring_display_id_ = gfx::Display::kInvalidDisplayID;
 566   software_mirroring_display_list_.clear();
 567   DisplayInfoList new_display_info_list;
 568   for (DisplayInfoList::const_iterator iter = updated_displays.begin();
 569        iter != updated_displays.end();
 570        ++iter) {
 571     if (!internal_display_connected)
 572       internal_display_connected =
 573           gfx::Display::IsInternalDisplayId(iter->id());
 574     // Mirrored monitors have the same origins.
 575     gfx::Point origin = iter->bounds_in_native().origin();
 576     if (origins.find(origin) != origins.end()) {
 577       InsertAndUpdateDisplayInfo(*iter);
 578       mirroring_display_id_ = iter->id();
 579     } else {
 580       origins.insert(origin);
 581       new_display_info_list.push_back(*iter);
 582     }
 583
 584     DisplayMode new_mode;
 585     new_mode.size = iter->bounds_in_native().size();
 586     new_mode.device_scale_factor = iter->device_scale_factor();
 587     new_mode.ui_scale = iter->configured_ui_scale();
 588     const std::vector<DisplayMode>& display_modes = iter->display_modes();
 589     // This is empty the displays are initialized from InitFromCommandLine.
 590     if (!display_modes.size())
 591       continue;
 592     auto display_modes_iter = FindDisplayMode(*iter, new_mode);
 593     // Update the actual resolution selected as the resolution request may fail.
 594     if (display_modes_iter == display_modes.end())
 595       display_modes_.erase(iter->id());
 596     else if (display_modes_.find(iter->id()) != display_modes_.end())
 597       display_modes_[iter->id()] = *display_modes_iter;
 598   }
 599   if (gfx::Display::HasInternalDisplay() && !internal_display_connected) {
 600     if (display_info_.find(gfx::Display::InternalDisplayId()) ==
 601         display_info_.end()) {
 602       // Create a dummy internal display if the chrome restarted
 603       // in docked mode.
 604       DisplayInfo internal_display_info(
 605           gfx::Display::InternalDisplayId(),
 606           l10n_util::GetStringUTF8(IDS_ASH_INTERNAL_DISPLAY_NAME),
 607           false /*Internal display must not have overscan */);
 608       internal_display_info.SetBounds(gfx::Rect(0, 0, 800, 600));
 609       display_info_[gfx::Display::InternalDisplayId()] = internal_display_info;
 610     } else {
 611       // Internal display is no longer active. Reset its rotation to user
 612       // preference, so that it is restored when the internal display becomes
 613       // active again.
 614       gfx::Display::Rotation user_rotation =
 615           display_info_[gfx::Display::InternalDisplayId()].GetRotation(
 616               gfx::Display::ROTATION_SOURCE_USER);
 617       display_info_[gfx::Display::InternalDisplayId()].SetRotation(
 618           user_rotation, gfx::Display::ROTATION_SOURCE_USER);
 619     }
 620   }
 621
 622 #if defined(OS_CHROMEOS)
 623   if (!base::SysInfo::IsRunningOnChromeOS() &&
 624       new_display_info_list.size() > 1) {
 625     DisplayIdPair pair = CreateDisplayIdPair(new_display_info_list[0].id(),
 626                                              new_display_info_list[1].id());
 627     DisplayLayout layout = layout_store_->GetRegisteredDisplayLayout(pair);
 628     // Mirror mode is set by DisplayConfigurator on the device.
 629     // Emulate it when running on linux desktop.
 630     if (layout.mirrored)
 631       SetMultiDisplayMode(MIRRORING);
 632   }
 633 #endif
 634
 635   UpdateDisplays(new_display_info_list);
 636 }
 637
 638 void DisplayManager::UpdateDisplays() {
 639   DisplayInfoList display_info_list;
 640   for (const auto& display : active_display_list_)
 641     display_info_list.push_back(GetDisplayInfo(display.id()));
 642   AddMirrorDisplayInfoIfAny(&display_info_list);
 643   UpdateDisplays(display_info_list);
 644 }
 645
 646 void DisplayManager::UpdateDisplays(
 647     const std::vector<DisplayInfo>& updated_display_info_list) {
 648 #if defined(OS_WIN)
 649   DCHECK_EQ(1u, updated_display_info_list.size()) <<
 650       ": Multiple display test does not work on Windows bots. Please "
 651       "skip (don't disable) the test using SupportsMultipleDisplays()";
 652 #endif
 653
 654   DisplayInfoList new_display_info_list = updated_display_info_list;
 655   std::sort(active_display_list_.begin(), active_display_list_.end(),
 656             DisplaySortFunctor());
 657   std::sort(new_display_info_list.begin(),
 658             new_display_info_list.end(),
 659             DisplayInfoSortFunctor());
 660
 661   if (new_display_info_list.size() > 1) {
 662     DisplayIdPair pair = CreateDisplayIdPair(new_display_info_list[0].id(),
 663                                              new_display_info_list[1].id());
 664     DisplayLayout layout = layout_store_->GetRegisteredDisplayLayout(pair);
 665     current_default_multi_display_mode_ =
 666         (layout.default_unified && unified_desktop_enabled_) ? UNIFIED
 667                                                              : EXTENDED;
 668   }
 669
 670   if (multi_display_mode_ != MIRRORING)
 671     multi_display_mode_ = current_default_multi_display_mode_;
 672
 673   CreateSoftwareMirroringDisplayInfo(&new_display_info_list);
 674
 675   // Close the mirroring window if any here to avoid creating two compositor on
 676   // one display.
 677   if (delegate_)
 678     delegate_->CloseMirroringDisplayIfNotNecessary();
 679
 680   DisplayList new_displays;
 681   DisplayList removed_displays;
 682   std::map<size_t, uint32_t> display_changes;
 683   std::vector<size_t> added_display_indices;
 684
 685   DisplayList::iterator curr_iter = active_display_list_.begin();
 686   DisplayInfoList::const_iterator new_info_iter = new_display_info_list.begin();
 687
 688   while (curr_iter != active_display_list_.end() ||
 689          new_info_iter != new_display_info_list.end()) {
 690     if (curr_iter == active_display_list_.end()) {
 691       // more displays in new list.
 692       added_display_indices.push_back(new_displays.size());
 693       InsertAndUpdateDisplayInfo(*new_info_iter);
 694       new_displays.push_back(
 695           CreateDisplayFromDisplayInfoById(new_info_iter->id()));
 696       ++new_info_iter;
 697     } else if (new_info_iter == new_display_info_list.end()) {
 698       // more displays in current list.
 699       removed_displays.push_back(*curr_iter);
 700       ++curr_iter;
 701     } else if (curr_iter->id() == new_info_iter->id()) {
 702       const gfx::Display& current_display = *curr_iter;
 703       // Copy the info because |CreateDisplayFromInfo| updates the instance.
 704       const DisplayInfo current_display_info =
 705           GetDisplayInfo(current_display.id());
 706       InsertAndUpdateDisplayInfo(*new_info_iter);
 707       gfx::Display new_display =
 708           CreateDisplayFromDisplayInfoById(new_info_iter->id());
 709       const DisplayInfo& new_display_info = GetDisplayInfo(new_display.id());
 710
 711       uint32_t metrics = gfx::DisplayObserver::DISPLAY_METRIC_NONE;
 712
 713       // At that point the new Display objects we have are not entirely updated,
 714       // they are missing the translation related to the Display disposition in
 715       // the layout.
 716       // Using display.bounds() and display.work_area() would fail most of the
 717       // time.
 718       if (force_bounds_changed_ ||
 719           (current_display_info.bounds_in_native() !=
 720            new_display_info.bounds_in_native()) ||
 721           (current_display_info.GetOverscanInsetsInPixel() !=
 722            new_display_info.GetOverscanInsetsInPixel()) ||
 723           current_display.size() != new_display.size()) {
 724         metrics |= gfx::DisplayObserver::DISPLAY_METRIC_BOUNDS |
 725             gfx::DisplayObserver::DISPLAY_METRIC_WORK_AREA;
 726       }
 727
 728       if (current_display.device_scale_factor() !=
 729           new_display.device_scale_factor()) {
 730         metrics |= gfx::DisplayObserver::DISPLAY_METRIC_DEVICE_SCALE_FACTOR;
 731       }
 732
 733       if (current_display.rotation() != new_display.rotation())
 734         metrics |= gfx::DisplayObserver::DISPLAY_METRIC_ROTATION;
 735
 736       if (metrics != gfx::DisplayObserver::DISPLAY_METRIC_NONE) {
 737         display_changes.insert(
 738             std::pair<size_t, uint32_t>(new_displays.size(), metrics));
 739       }
 740
 741       new_display.UpdateWorkAreaFromInsets(current_display.GetWorkAreaInsets());
 742       new_displays.push_back(new_display);
 743       ++curr_iter;
 744       ++new_info_iter;
 745     } else if (curr_iter->id() < new_info_iter->id()) {
 746       // more displays in current list between ids, which means it is deleted.
 747       removed_displays.push_back(*curr_iter);
 748       ++curr_iter;
 749     } else {
 750       // more displays in new list between ids, which means it is added.
 751       added_display_indices.push_back(new_displays.size());
 752       InsertAndUpdateDisplayInfo(*new_info_iter);
 753       new_displays.push_back(
 754           CreateDisplayFromDisplayInfoById(new_info_iter->id()));
 755       ++new_info_iter;
 756     }
 757   }
 758   gfx::Display old_primary;
 759   if (delegate_)
 760     old_primary = screen_->GetPrimaryDisplay();
 761
 762   // Clear focus if the display has been removed, but don't clear focus if
 763   // the destkop has been moved from one display to another
 764   // (mirror -> docked, docked -> single internal).
 765   bool clear_focus =
 766       !removed_displays.empty() &&
 767       !(removed_displays.size() == 1 && added_display_indices.size() == 1);
 768   if (delegate_)
 769     delegate_->PreDisplayConfigurationChange(clear_focus);
 770
 771   std::vector<size_t> updated_indices;
 772   if (UpdateNonPrimaryDisplayBoundsForLayout(&new_displays, &updated_indices)) {
 773     for (std::vector<size_t>::iterator it = updated_indices.begin();
 774          it != updated_indices.end(); ++it) {
 775       size_t updated_index = *it;
 776       if (std::find(added_display_indices.begin(),
 777                     added_display_indices.end(),
 778                     updated_index) == added_display_indices.end()) {
 779         uint32_t metrics = gfx::DisplayObserver::DISPLAY_METRIC_BOUNDS |
 780                            gfx::DisplayObserver::DISPLAY_METRIC_WORK_AREA;
 781         if (display_changes.find(updated_index) != display_changes.end())
 782           metrics |= display_changes[updated_index];
 783
 784         display_changes[updated_index] = metrics;
 785       }
 786     }
 787   }
 788
 789   active_display_list_ = new_displays;
 790
 791   RefreshFontParams();
 792   base::AutoReset<bool> resetter(&change_display_upon_host_resize_, false);
 793
 794   int active_display_list_size = active_display_list_.size();
 795   // Temporarily add displays to be removed because display object
 796   // being removed are accessed during shutting down the root.
 797   active_display_list_.insert(active_display_list_.end(),
 798                               removed_displays.begin(), removed_displays.end());
 799
 800   for (const auto& display : removed_displays)
 801     screen_->NotifyDisplayRemoved(display);
 802
 803   for (size_t index : added_display_indices)
 804     screen_->NotifyDisplayAdded(active_display_list_[index]);
 805
 806   active_display_list_.resize(active_display_list_size);
 807
 808   bool notify_primary_change =
 809       delegate_ ? old_primary.id() != screen_->GetPrimaryDisplay().id() : false;
 810
 811   for (std::map<size_t, uint32_t>::iterator iter = display_changes.begin();
 812        iter != display_changes.end();
 813        ++iter) {
 814     uint32_t metrics = iter->second;
 815     const gfx::Display& updated_display = active_display_list_[iter->first];
 816
 817     if (notify_primary_change &&
 818         updated_display.id() == screen_->GetPrimaryDisplay().id()) {
 819       metrics |= gfx::DisplayObserver::DISPLAY_METRIC_PRIMARY;
 820       notify_primary_change = false;
 821     }
 822     screen_->NotifyMetricsChanged(updated_display, metrics);
 823   }
 824
 825   if (notify_primary_change) {
 826     // This happens when a primary display has moved to anther display without
 827     // bounds change.
 828     const gfx::Display& primary = screen_->GetPrimaryDisplay();
 829     if (primary.id() != old_primary.id()) {
 830       uint32_t metrics = gfx::DisplayObserver::DISPLAY_METRIC_PRIMARY;
 831       if (primary.size() != old_primary.size()) {
 832         metrics |= (gfx::DisplayObserver::DISPLAY_METRIC_BOUNDS |
 833                     gfx::DisplayObserver::DISPLAY_METRIC_WORK_AREA);
 834       }
 835       if (primary.device_scale_factor() != old_primary.device_scale_factor())
 836         metrics |= gfx::DisplayObserver::DISPLAY_METRIC_DEVICE_SCALE_FACTOR;
 837
 838       screen_->NotifyMetricsChanged(primary, metrics);
 839     }
 840   }
 841
 842   if (delegate_)
 843     delegate_->PostDisplayConfigurationChange();
 844
 845 #if defined(USE_X11) && defined(OS_CHROMEOS)
 846   if (!display_changes.empty() && base::SysInfo::IsRunningOnChromeOS())
 847     ui::ClearX11DefaultRootWindow();
 848 #endif
 849
 850   // Create the mirroring window asynchronously after all displays
 851   // are added so that it can mirror the display newly added. This can
 852   // happen when switching from dock mode to software mirror mode.
 853   CreateMirrorWindowAsyncIfAny();
 854 }
 855
 856 const gfx::Display& DisplayManager::GetDisplayAt(size_t index) const {
 857   DCHECK_LT(index, active_display_list_.size());
 858   return active_display_list_[index];
 859 }
 860
 861 const gfx::Display& DisplayManager::GetPrimaryDisplayCandidate() const {
 862   if (GetNumDisplays() != 2)
 863     return active_display_list_[0];
 864   DisplayLayout layout = layout_store_->GetRegisteredDisplayLayout(
 865       GetCurrentDisplayIdPair());
 866   return GetDisplayForId(layout.primary_id);
 867 }
 868
 869 size_t DisplayManager::GetNumDisplays() const {
 870   return active_display_list_.size();
 871 }
 872
 873 bool DisplayManager::IsInMirrorMode() const {
 874   return mirroring_display_id_ != gfx::Display::kInvalidDisplayID;
 875 }
 876
 877 void DisplayManager::SetUnifiedDesktopEnabled(bool enable) {
 878   unified_desktop_enabled_ = enable;
 879   // There is no need to update the displays in mirror mode. Doing
 880   // this in hardware mirroring mode can cause crash because display
 881   // info in hardware mirroring comes from DisplayConfigurator.
 882   if (!IsInMirrorMode())
 883     ReconfigureDisplays();
 884 }
 885
 886 bool DisplayManager::IsInUnifiedMode() const {
 887   return multi_display_mode_ == UNIFIED &&
 888          !software_mirroring_display_list_.empty();
 889 }
 890
 891 const DisplayInfo& DisplayManager::GetDisplayInfo(int64 display_id) const {
 892   DCHECK_NE(gfx::Display::kInvalidDisplayID, display_id);
 893
 894   std::map<int64, DisplayInfo>::const_iterator iter =
 895       display_info_.find(display_id);
 896   CHECK(iter != display_info_.end()) << display_id;
 897   return iter->second;
 898 }
 899
 900 const gfx::Display DisplayManager::GetMirroringDisplayById(
 901     int64 display_id) const {
 902   auto iter = std::find_if(software_mirroring_display_list_.begin(),
 903                            software_mirroring_display_list_.end(),
 904                            [display_id](const gfx::Display& display) {
 905                              return display.id() == display_id;
 906                            });
 907   return iter == software_mirroring_display_list_.end() ? gfx::Display()
 908                                                         : *iter;
 909 }
 910
 911 std::string DisplayManager::GetDisplayNameForId(int64 id) {
 912   if (id == gfx::Display::kInvalidDisplayID)
 913     return l10n_util::GetStringUTF8(IDS_ASH_STATUS_TRAY_UNKNOWN_DISPLAY_NAME);
 914
 915   std::map<int64, DisplayInfo>::const_iterator iter = display_info_.find(id);
 916   if (iter != display_info_.end() && !iter->second.name().empty())
 917     return iter->second.name();
 918
 919   return base::StringPrintf("Display %d", static_cast<int>(id));
 920 }
 921
 922 int64 DisplayManager::GetDisplayIdForUIScaling() const {
 923   // UI Scaling is effective on internal display.
 924   return gfx::Display::HasInternalDisplay() ? gfx::Display::InternalDisplayId()
 925                                             : gfx::Display::kInvalidDisplayID;
 926 }
 927
 928 void DisplayManager::SetMirrorMode(bool mirror) {
 929 #if defined(OS_CHROMEOS)
 930   if (num_connected_displays() <= 1)
 931     return;
 932
 933   if (base::SysInfo::IsRunningOnChromeOS()) {
 934     ui::MultipleDisplayState new_state =
 935         mirror ? ui::MULTIPLE_DISPLAY_STATE_DUAL_MIRROR
 936                : ui::MULTIPLE_DISPLAY_STATE_DUAL_EXTENDED;
 937     Shell::GetInstance()->display_configurator()->SetDisplayMode(new_state);
 938     return;
 939   }
 940   multi_display_mode_ =
 941       mirror ? MIRRORING : current_default_multi_display_mode_;
 942   ReconfigureDisplays();
 943   if (Shell::GetInstance()->display_configurator_animation()) {
 944     Shell::GetInstance()->display_configurator_animation()->
 945         StartFadeInAnimation();
 946   }
 947   RunPendingTasksForTest();
 948 #endif
 949 }
 950
 951 void DisplayManager::AddRemoveDisplay() {
 952   DCHECK(!active_display_list_.empty());
 953   std::vector<DisplayInfo> new_display_info_list;
 954   const DisplayInfo& first_display =
 955       IsInUnifiedMode()
 956           ? GetDisplayInfo(software_mirroring_display_list_[0].id())
 957           : GetDisplayInfo(active_display_list_[0].id());
 958   new_display_info_list.push_back(first_display);
 959   // Add if there is only one display connected.
 960   if (num_connected_displays() == 1) {
 961     const int kVerticalOffsetPx = 100;
 962     // Layout the 2nd display below the primary as with the real device.
 963     gfx::Rect host_bounds = first_display.bounds_in_native();
 964     new_display_info_list.push_back(
 965         DisplayInfo::CreateFromSpec(base::StringPrintf(
 966             "%d+%d-600x%d", host_bounds.x(),
 967             host_bounds.bottom() + kVerticalOffsetPx, host_bounds.height())));
 968   }
 969   num_connected_displays_ = new_display_info_list.size();
 970   mirroring_display_id_ = gfx::Display::kInvalidDisplayID;
 971   software_mirroring_display_list_.clear();
 972   UpdateDisplays(new_display_info_list);
 973 }
 974
 975 void DisplayManager::ToggleDisplayScaleFactor() {
 976   DCHECK(!active_display_list_.empty());
 977   std::vector<DisplayInfo> new_display_info_list;
 978   for (DisplayList::const_iterator iter = active_display_list_.begin();
 979        iter != active_display_list_.end(); ++iter) {
 980     DisplayInfo display_info = GetDisplayInfo(iter->id());
 981     display_info.set_device_scale_factor(
 982         display_info.device_scale_factor() == 1.0f ? 2.0f : 1.0f);
 983     new_display_info_list.push_back(display_info);
 984   }
 985   AddMirrorDisplayInfoIfAny(&new_display_info_list);
 986   UpdateDisplays(new_display_info_list);
 987 }
 988
 989 #if defined(OS_CHROMEOS)
 990 void DisplayManager::SetSoftwareMirroring(bool enabled) {
 991   SetMultiDisplayMode(enabled ? MIRRORING
 992                               : current_default_multi_display_mode_);
 993 }
 994
 995 bool DisplayManager::SoftwareMirroringEnabled() const {
 996   return software_mirroring_enabled();
 997 }
 998 #endif
 999
1000 void DisplayManager::SetDefaultMultiDisplayModeForCurrentDisplays(
1001     MultiDisplayMode mode) {
1002   DCHECK_NE(MIRRORING, mode);
1003   DisplayIdPair pair = GetCurrentDisplayIdPair();
1004   layout_store_->UpdateMultiDisplayState(pair, IsInMirrorMode(),
1005                                          mode == UNIFIED);
1006 }
1007
1008 void DisplayManager::SetMultiDisplayMode(MultiDisplayMode mode) {
1009   multi_display_mode_ = mode;
1010   mirroring_display_id_ = gfx::Display::kInvalidDisplayID;
1011   software_mirroring_display_list_.clear();
1012 }
1013
1014 void DisplayManager::ReconfigureDisplays() {
1015   DisplayInfoList display_info_list;
1016   for (DisplayList::const_iterator iter = active_display_list_.begin();
1017        (display_info_list.size() < 2 && iter != active_display_list_.end());
1018        ++iter) {
1019     if (iter->id() == kUnifiedDisplayId)
1020       continue;
1021     display_info_list.push_back(GetDisplayInfo(iter->id()));
1022   }
1023   for (auto iter = software_mirroring_display_list_.begin();
1024        (display_info_list.size() < 2 &&
1025         iter != software_mirroring_display_list_.end());
1026        ++iter) {
1027     display_info_list.push_back(GetDisplayInfo(iter->id()));
1028   }
1029   mirroring_display_id_ = gfx::Display::kInvalidDisplayID;
1030   software_mirroring_display_list_.clear();
1031   UpdateDisplays(display_info_list);
1032 }
1033
1034 bool DisplayManager::UpdateDisplayBounds(int64 display_id,
1035                                          const gfx::Rect& new_bounds) {
1036   if (change_display_upon_host_resize_) {
1037     display_info_[display_id].SetBounds(new_bounds);
1038     // Don't notify observers if the mirrored window has changed.
1039     if (software_mirroring_enabled() && mirroring_display_id_ == display_id)
1040       return false;
1041     gfx::Display* display = FindDisplayForId(display_id);
1042     display->SetSize(display_info_[display_id].size_in_pixel());
1043     screen_->NotifyMetricsChanged(*display,
1044                                   gfx::DisplayObserver::DISPLAY_METRIC_BOUNDS);
1045     return true;
1046   }
1047   return false;
1048 }
1049
1050 void DisplayManager::CreateMirrorWindowAsyncIfAny() {
1051   // Do not post a task if the software mirroring doesn't exist, or
1052   // during initialization when compositor's init task isn't posted yet.
1053   // ash::Shell::Init() will call this after the compositor is initialized.
1054   if (software_mirroring_display_list_.empty() || !delegate_)
1055     return;
1056   base::MessageLoopForUI::current()->PostTask(
1057       FROM_HERE,
1058       base::Bind(&DisplayManager::CreateMirrorWindowIfAny,
1059                  weak_ptr_factory_.GetWeakPtr()));
1060 }
1061
1062 scoped_ptr<MouseWarpController> DisplayManager::CreateMouseWarpController(
1063     aura::Window* drag_source) const {
1064   if (IsInUnifiedMode() && num_connected_displays() >= 2)
1065     return make_scoped_ptr(new UnifiedMouseWarpController());
1066   // Extra check for |num_connected_displays()| is for SystemDisplayApiTest
1067   // that injects MockScreen.
1068   if (GetNumDisplays() < 2 || num_connected_displays() < 2)
1069     return make_scoped_ptr(new NullMouseWarpController());
1070   return make_scoped_ptr(new ExtendedMouseWarpController(drag_source));
1071 }
1072
1073 void DisplayManager::CreateScreenForShutdown() const {
1074   bool native_is_ash =
1075       gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_NATIVE) == screen_.get();
1076   delete screen_for_shutdown;
1077   screen_for_shutdown = screen_->CloneForShutdown();
1078   gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_ALTERNATE,
1079                                  screen_for_shutdown);
1080   if (native_is_ash) {
1081     gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE,
1082                                    screen_for_shutdown);
1083   }
1084 }
1085
1086 void DisplayManager::UpdateInternalDisplayModeListForTest() {
1087   if (!gfx::Display::HasInternalDisplay() ||
1088       display_info_.count(gfx::Display::InternalDisplayId()) == 0)
1089     return;
1090   DisplayInfo* info = &display_info_[gfx::Display::InternalDisplayId()];
1091   SetInternalDisplayModeList(info);
1092 }
1093
1094 void DisplayManager::CreateSoftwareMirroringDisplayInfo(
1095     DisplayInfoList* display_info_list) {
1096   // Use the internal display or 1st as the mirror source, then scale
1097   // the root window so that it matches the external display's
1098   // resolution. This is necessary in order for scaling to work while
1099   // mirrored.
1100   if (display_info_list->size() == 2) {
1101     switch (multi_display_mode_) {
1102       case MIRRORING: {
1103         bool zero_is_source =
1104             first_display_id_ == (*display_info_list)[0].id() ||
1105             gfx::Display::IsInternalDisplayId((*display_info_list)[0].id());
1106         DCHECK_EQ(MIRRORING, multi_display_mode_);
1107         mirroring_display_id_ =
1108             (*display_info_list)[zero_is_source ? 1 : 0].id();
1109
1110         int64 display_id = mirroring_display_id_;
1111         auto iter =
1112             std::find_if(display_info_list->begin(), display_info_list->end(),
1113                          [display_id](const DisplayInfo& info) {
1114                            return info.id() == display_id;
1115                          });
1116         DCHECK(iter != display_info_list->end());
1117
1118         DisplayInfo info = *iter;
1119         info.SetOverscanInsets(gfx::Insets());
1120         InsertAndUpdateDisplayInfo(info);
1121         software_mirroring_display_list_.push_back(
1122             CreateMirroringDisplayFromDisplayInfoById(mirroring_display_id_,
1123                                                       gfx::Point(), 1.0f));
1124         display_info_list->erase(iter);
1125         break;
1126       }
1127       case UNIFIED: {
1128         // TODO(oshima): Currently, all displays are laid out horizontally,
1129         // from left to right. Allow more flexible layouts, such as
1130         // right to left, or vertical layouts.
1131         gfx::Rect unified_bounds;
1132         software_mirroring_display_list_.clear();
1133
1134         // 1st Pass. Find the max size.
1135         int max_height = std::numeric_limits<int>::min();
1136
1137         int default_height = 0;
1138         float default_device_scale_factor = 1.0f;
1139         for (auto& info : *display_info_list) {
1140           max_height = std::max(max_height, info.size_in_pixel().height());
1141           if (!default_height || gfx::Display::IsInternalDisplayId(info.id())) {
1142             default_height = info.size_in_pixel().height();
1143             default_device_scale_factor = info.device_scale_factor();
1144           }
1145         }
1146
1147         std::vector<DisplayMode> display_mode_list;
1148         std::set<std::pair<float, float>> dsf_scale_list;
1149
1150         // 2nd Pass. Compute the unified display size.
1151         for (auto& info : *display_info_list) {
1152           InsertAndUpdateDisplayInfo(info);
1153           gfx::Point origin(unified_bounds.right(), 0);
1154           float scale =
1155               info.size_in_pixel().height() / static_cast<float>(max_height);
1156           // The display is scaled to fit the unified desktop size.
1157           gfx::Display display = CreateMirroringDisplayFromDisplayInfoById(
1158               info.id(), origin, 1.0f / scale);
1159           unified_bounds.Union(display.bounds());
1160
1161           dsf_scale_list.insert(
1162               std::make_pair(info.device_scale_factor(), scale));
1163         }
1164
1165         DisplayInfo info(kUnifiedDisplayId, "Unified Desktop", false);
1166
1167         DisplayMode native_mode(unified_bounds.size(), 60.0f, false, true);
1168         std::vector<DisplayMode> modes =
1169             CreateUnifiedDisplayModeList(native_mode, dsf_scale_list);
1170
1171         // Find the default mode.
1172         auto iter = std::find_if(
1173             modes.begin(), modes.end(),
1174             [default_height,
1175              default_device_scale_factor](const DisplayMode& mode) {
1176               return mode.size.height() == default_height &&
1177                      mode.device_scale_factor == default_device_scale_factor;
1178             });
1179         iter->native = true;
1180         info.SetDisplayModes(modes);
1181         info.set_device_scale_factor(iter->device_scale_factor);
1182         info.SetBounds(gfx::Rect(iter->size));
1183
1184         // Forget the configured resolution if the original unified
1185         // desktop resolution has changed.
1186         if (display_info_.count(kUnifiedDisplayId) != 0 &&
1187             GetMaxNativeSize(display_info_[kUnifiedDisplayId]) !=
1188                 unified_bounds.size()) {
1189           display_modes_.erase(kUnifiedDisplayId);
1190         }
1191
1192         // 3rd Pass. Set the selected mode, then recompute the mirroring
1193         // display size.
1194         DisplayMode mode;
1195         if (GetSelectedModeForDisplayId(kUnifiedDisplayId, &mode) &&
1196             FindDisplayMode(info, mode) != info.display_modes().end()) {
1197           info.set_device_scale_factor(mode.device_scale_factor);
1198           info.SetBounds(gfx::Rect(mode.size));
1199         } else {
1200           display_modes_.erase(kUnifiedDisplayId);
1201         }
1202
1203         int unified_display_height = info.size_in_pixel().height();
1204         gfx::Point origin;
1205         for (auto& info : *display_info_list) {
1206           float display_scale = info.size_in_pixel().height() /
1207                                 static_cast<float>(unified_display_height);
1208           gfx::Display display = CreateMirroringDisplayFromDisplayInfoById(
1209               info.id(), origin, 1.0f / display_scale);
1210           origin.Offset(display.size().width(), 0);
1211           display.UpdateWorkAreaFromInsets(gfx::Insets());
1212           software_mirroring_display_list_.push_back(display);
1213         }
1214
1215         display_info_list->clear();
1216         display_info_list->push_back(info);
1217         InsertAndUpdateDisplayInfo(info);
1218         break;
1219       }
1220       case EXTENDED:
1221         break;
1222     }
1223   }
1224 }
1225
1226 gfx::Display* DisplayManager::FindDisplayForId(int64 id) {
1227   auto iter = std::find_if(
1228       active_display_list_.begin(), active_display_list_.end(),
1229       [id](const gfx::Display& display) { return display.id() == id; });
1230   if (iter != active_display_list_.end())
1231     return &(*iter);
1232   // TODO(oshima): This happens when a windows in unified desktop have
1233   // been moved to normal window. Fix this.
1234   if (id != kUnifiedDisplayId)
1235     DLOG(WARNING) << "Could not find display:" << id;
1236   return NULL;
1237 }
1238
1239 void DisplayManager::AddMirrorDisplayInfoIfAny(
1240     std::vector<DisplayInfo>* display_info_list) {
1241   if (software_mirroring_enabled() && IsInMirrorMode())
1242     display_info_list->push_back(GetDisplayInfo(mirroring_display_id_));
1243 }
1244
1245 void DisplayManager::InsertAndUpdateDisplayInfo(const DisplayInfo& new_info) {
1246   std::map<int64, DisplayInfo>::iterator info =
1247       display_info_.find(new_info.id());
1248   if (info != display_info_.end()) {
1249     info->second.Copy(new_info);
1250   } else {
1251     display_info_[new_info.id()] = new_info;
1252     display_info_[new_info.id()].set_native(false);
1253   }
1254   display_info_[new_info.id()].UpdateDisplaySize();
1255   OnDisplayInfoUpdated(display_info_[new_info.id()]);
1256 }
1257
1258 void DisplayManager::OnDisplayInfoUpdated(const DisplayInfo& display_info) {
1259 #if defined(OS_CHROMEOS)
1260   ui::ColorCalibrationProfile color_profile = display_info.color_profile();
1261   if (color_profile != ui::COLOR_PROFILE_STANDARD) {
1262     Shell::GetInstance()->display_configurator()->SetColorCalibrationProfile(
1263         display_info.id(), color_profile);
1264   }
1265 #endif
1266 }
1267
1268 gfx::Display DisplayManager::CreateDisplayFromDisplayInfoById(int64 id) {
1269   DCHECK(display_info_.find(id) != display_info_.end()) << "id=" << id;
1270   const DisplayInfo& display_info = display_info_[id];
1271
1272   gfx::Display new_display(display_info.id());
1273   gfx::Rect bounds_in_native(display_info.size_in_pixel());
1274   float device_scale_factor = display_info.GetEffectiveDeviceScaleFactor();
1275
1276   // Simply set the origin to (0,0).  The primary display's origin is
1277   // always (0,0) and the bounds of non-primary display(s) will be updated
1278   // in |UpdateNonPrimaryDisplayBoundsForLayout| called in |UpdateDisplay|.
1279   new_display.SetScaleAndBounds(
1280       device_scale_factor, gfx::Rect(bounds_in_native.size()));
1281   new_display.set_rotation(display_info.GetActiveRotation());
1282   new_display.set_touch_support(display_info.touch_support());
1283   return new_display;
1284 }
1285
1286 gfx::Display DisplayManager::CreateMirroringDisplayFromDisplayInfoById(
1287     int64 id,
1288     const gfx::Point& origin,
1289     float scale) {
1290   DCHECK(display_info_.find(id) != display_info_.end()) << "id=" << id;
1291   const DisplayInfo& display_info = display_info_[id];
1292
1293   gfx::Display new_display(display_info.id());
1294   new_display.SetScaleAndBounds(
1295       1.0f, gfx::Rect(origin, gfx::ToFlooredSize(gfx::ScaleSize(
1296                                   display_info.size_in_pixel(), scale))));
1297   new_display.set_touch_support(display_info.touch_support());
1298   return new_display;
1299 }
1300
1301 bool DisplayManager::UpdateNonPrimaryDisplayBoundsForLayout(
1302     DisplayList* displays,
1303     std::vector<size_t>* updated_indices) const {
1304
1305   if (displays->size() < 2U)
1306     return false;
1307
1308   if (displays->size() > 2U) {
1309     // For more than 2 displays, always use horizontal layout.
1310     int x_offset = displays->at(0).bounds().width();
1311     for (size_t i = 1; i < displays->size(); ++i) {
1312       gfx::Display& display = displays->at(i);
1313       const gfx::Rect& bounds = display.bounds();
1314       gfx::Point origin = gfx::Point(x_offset, 0);
1315       gfx::Insets insets = display.GetWorkAreaInsets();
1316       display.set_bounds(gfx::Rect(origin, bounds.size()));
1317       display.UpdateWorkAreaFromInsets(insets);
1318       x_offset += bounds.width();
1319       updated_indices->push_back(i);
1320     }
1321     return true;
1322   }
1323
1324   DisplayLayout layout = layout_store_->ComputeDisplayLayoutForDisplayIdPair(
1325       CreateDisplayIdPair(displays->at(0).id(), displays->at(1).id()));
1326
1327   // Ignore if a user has a old format (should be extremely rare)
1328   // and this will be replaced with DCHECK.
1329   if (layout.primary_id != gfx::Display::kInvalidDisplayID) {
1330     size_t primary_index, secondary_index;
1331     if (displays->at(0).id() == layout.primary_id) {
1332       primary_index = 0;
1333       secondary_index = 1;
1334     } else {
1335       primary_index = 1;
1336       secondary_index = 0;
1337     }
1338     // This function may be called before the secondary display is
1339     // registered. The bounds is empty in that case and will
1340     // return true.
1341     gfx::Rect bounds =
1342         GetDisplayForId(displays->at(secondary_index).id()).bounds();
1343     UpdateDisplayBoundsForLayout(
1344         layout, displays->at(primary_index), &displays->at(secondary_index));
1345     updated_indices->push_back(secondary_index);
1346     return bounds != displays->at(secondary_index).bounds();
1347   }
1348   return false;
1349 }
1350
1351 void DisplayManager::CreateMirrorWindowIfAny() {
1352   if (software_mirroring_display_list_.empty() || !delegate_)
1353     return;
1354   DisplayInfoList list;
1355   for (auto& display : software_mirroring_display_list_)
1356     list.push_back(GetDisplayInfo(display.id()));
1357   delegate_->CreateOrUpdateMirroringDisplay(list);
1358 }
1359
1360 // static
1361 void DisplayManager::UpdateDisplayBoundsForLayout(
1362     const DisplayLayout& layout,
1363     const gfx::Display& primary_display,
1364     gfx::Display* secondary_display) {
1365   DCHECK_EQ("0,0", primary_display.bounds().origin().ToString());
1366
1367   const gfx::Rect& primary_bounds = primary_display.bounds();
1368   const gfx::Rect& secondary_bounds = secondary_display->bounds();
1369   gfx::Point new_secondary_origin = primary_bounds.origin();
1370
1371   DisplayLayout::Position position = layout.position;
1372
1373   // Ignore the offset in case the secondary display doesn't share edges with
1374   // the primary display.
1375   int offset = layout.offset;
1376   if (position == DisplayLayout::TOP || position == DisplayLayout::BOTTOM) {
1377     offset = std::min(
1378         offset, primary_bounds.width() - kMinimumOverlapForInvalidOffset);
1379     offset = std::max(
1380         offset, -secondary_bounds.width() + kMinimumOverlapForInvalidOffset);
1381   } else {
1382     offset = std::min(
1383         offset, primary_bounds.height() - kMinimumOverlapForInvalidOffset);
1384     offset = std::max(
1385         offset, -secondary_bounds.height() + kMinimumOverlapForInvalidOffset);
1386   }
1387   switch (position) {
1388     case DisplayLayout::TOP:
1389       new_secondary_origin.Offset(offset, -secondary_bounds.height());
1390       break;
1391     case DisplayLayout::RIGHT:
1392       new_secondary_origin.Offset(primary_bounds.width(), offset);
1393       break;
1394     case DisplayLayout::BOTTOM:
1395       new_secondary_origin.Offset(offset, primary_bounds.height());
1396       break;
1397     case DisplayLayout::LEFT:
1398       new_secondary_origin.Offset(-secondary_bounds.width(), offset);
1399       break;
1400   }
1401   gfx::Insets insets = secondary_display->GetWorkAreaInsets();
1402   secondary_display->set_bounds(
1403       gfx::Rect(new_secondary_origin, secondary_bounds.size()));
1404   secondary_display->UpdateWorkAreaFromInsets(insets);
1405 }
1406
1407 void DisplayManager::RunPendingTasksForTest() {
1408   if (!software_mirroring_display_list_.empty())
1409     base::RunLoop().RunUntilIdle();
1410 }
1411
1412 }  // namespace ash