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 <vector>
  12
  13 #include "ash/ash_switches.h"
  14 #include "ash/display/display_layout_store.h"
  15 #include "ash/display/screen_ash.h"
  16 #include "ash/screen_util.h"
  17 #include "ash/shell.h"
  18 #include "base/auto_reset.h"
  19 #include "base/command_line.h"
  20 #include "base/logging.h"
  21 #include "base/metrics/histogram.h"
  22 #include "base/strings/string_number_conversions.h"
  23 #include "base/strings/string_split.h"
  24 #include "base/strings/stringprintf.h"
  25 #include "base/strings/utf_string_conversions.h"
  26 #include "grit/ash_strings.h"
  27 #include "ui/base/l10n/l10n_util.h"
  28 #include "ui/gfx/display.h"
  29 #include "ui/gfx/display_observer.h"
  30 #include "ui/gfx/font_render_params.h"
  31 #include "ui/gfx/rect.h"
  32 #include "ui/gfx/screen.h"
  33 #include "ui/gfx/size_conversions.h"
  34
  35 #if defined(USE_X11)
  36 #include "ui/base/x/x11_util.h"
  37 #endif
  38
  39 #if defined(OS_CHROMEOS)
  40 #include "ash/display/display_configurator_animation.h"
  41 #include "base/sys_info.h"
  42 #endif
  43
  44 #if defined(OS_WIN)
  45 #include "base/win/windows_version.h"
  46 #endif
  47
  48 namespace ash {
  49 typedef std::vector<gfx::Display> DisplayList;
  50 typedef std::vector<DisplayInfo> DisplayInfoList;
  51
  52 namespace {
  53
  54 // We need to keep this in order for unittests to tell if
  55 // the object in gfx::Screen::GetScreenByType is for shutdown.
  56 gfx::Screen* screen_for_shutdown = NULL;
  57
  58 // The number of pixels to overlap between the primary and secondary displays,
  59 // in case that the offset value is too large.
  60 const int kMinimumOverlapForInvalidOffset = 100;
  61
  62 // List of value UI Scale values. Scales for 2x are equivalent to 640,
  63 // 800, 1024, 1280, 1440, 1600 and 1920 pixel width respectively on
  64 // 2560 pixel width 2x density display. Please see crbug.com/233375
  65 // for the full list of resolutions.
  66 const float kUIScalesFor2x[] =
  67     {0.5f, 0.625f, 0.8f, 1.0f, 1.125f, 1.25f, 1.5f, 2.0f};
  68 const float kUIScalesFor1_25x[] = {0.5f, 0.625f, 0.8f, 1.0f, 1.25f };
  69 const float kUIScalesFor1280[] = {0.5f, 0.625f, 0.8f, 1.0f, 1.125f };
  70 const float kUIScalesFor1366[] = {0.5f, 0.6f, 0.75f, 1.0f, 1.125f };
  71
  72 struct DisplaySortFunctor {
  73   bool operator()(const gfx::Display& a, const gfx::Display& b) {
  74     return a.id() < b.id();
  75   }
  76 };
  77
  78 struct DisplayInfoSortFunctor {
  79   bool operator()(const DisplayInfo& a, const DisplayInfo& b) {
  80     return a.id() < b.id();
  81   }
  82 };
  83
  84 struct DisplayModeMatcher {
  85   DisplayModeMatcher(const DisplayMode& target_mode)
  86       : target_mode(target_mode) {}
  87   bool operator()(const DisplayMode& mode) {
  88     return target_mode.IsEquivalent(mode);
  89   }
  90   DisplayMode target_mode;
  91 };
  92
  93 struct ScaleComparator {
  94   explicit ScaleComparator(float s) : scale(s) {}
  95
  96   bool operator()(float s) const {
  97     const float kEpsilon = 0.0001f;
  98     return std::abs(scale - s) < kEpsilon;
  99   }
 100   float scale;
 101 };
 102
 103 gfx::Display& GetInvalidDisplay() {
 104   static gfx::Display* invalid_display = new gfx::Display();
 105   return *invalid_display;
 106 }
 107
 108 void MaybeInitInternalDisplay(int64 id) {
 109   CommandLine* command_line = CommandLine::ForCurrentProcess();
 110   if (command_line->HasSwitch(switches::kAshUseFirstDisplayAsInternal))
 111     gfx::Display::SetInternalDisplayId(id);
 112 }
 113
 114 // Scoped objects used to either create or close the non desktop window
 115 // at specific timing.
 116 class NonDesktopDisplayUpdater {
 117  public:
 118   NonDesktopDisplayUpdater(DisplayManager* manager,
 119                            DisplayManager::Delegate* delegate)
 120       : manager_(manager),
 121         delegate_(delegate),
 122         enabled_(manager_->second_display_mode() != DisplayManager::EXTENDED &&
 123                  manager_->non_desktop_display().is_valid()) {
 124   }
 125
 126   ~NonDesktopDisplayUpdater() {
 127     if (!delegate_)
 128       return;
 129
 130     if (enabled_) {
 131       DisplayInfo display_info = manager_->GetDisplayInfo(
 132           manager_->non_desktop_display().id());
 133       delegate_->CreateOrUpdateNonDesktopDisplay(display_info);
 134     } else {
 135       delegate_->CloseNonDesktopDisplay();
 136     }
 137   }
 138
 139   bool enabled() const { return enabled_; }
 140
 141  private:
 142   DisplayManager* manager_;
 143   DisplayManager::Delegate* delegate_;
 144   bool enabled_;
 145   DISALLOW_COPY_AND_ASSIGN(NonDesktopDisplayUpdater);
 146 };
 147
 148 }  // namespace
 149
 150 using std::string;
 151 using std::vector;
 152
 153 DisplayManager::DisplayManager()
 154     : delegate_(NULL),
 155       screen_ash_(new ScreenAsh),
 156       screen_(screen_ash_.get()),
 157       layout_store_(new DisplayLayoutStore),
 158       first_display_id_(gfx::Display::kInvalidDisplayID),
 159       num_connected_displays_(0),
 160       force_bounds_changed_(false),
 161       change_display_upon_host_resize_(false),
 162       second_display_mode_(EXTENDED),
 163       mirrored_display_id_(gfx::Display::kInvalidDisplayID),
 164       registered_internal_display_rotation_lock_(false),
 165       registered_internal_display_rotation_(gfx::Display::ROTATE_0) {
 166
 167 #if defined(OS_CHROMEOS)
 168   // Enable only on the device so that DisplayManagerFontTest passes.
 169   if (base::SysInfo::IsRunningOnChromeOS())
 170     DisplayInfo::SetUse125DSFForUIScaling(true);
 171
 172   change_display_upon_host_resize_ = !base::SysInfo::IsRunningOnChromeOS();
 173 #endif
 174   gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_ALTERNATE,
 175                                  screen_ash_.get());
 176   gfx::Screen* current_native =
 177       gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_NATIVE);
 178   // If there is no native, or the native was for shutdown,
 179   // use ash's screen.
 180   if (!current_native ||
 181       current_native == screen_for_shutdown) {
 182     gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE,
 183                                    screen_ash_.get());
 184   }
 185 }
 186
 187 DisplayManager::~DisplayManager() {
 188 #if defined(OS_CHROMEOS)
 189   // Reset the font params.
 190   gfx::SetFontRenderParamsDeviceScaleFactor(1.0f);
 191 #endif
 192 }
 193
 194 // static
 195 std::vector<float> DisplayManager::GetScalesForDisplay(
 196     const DisplayInfo& info) {
 197
 198 #define ASSIGN_ARRAY(v, a) v.assign(a, a + arraysize(a))
 199
 200   std::vector<float> ret;
 201   if (info.device_scale_factor() == 2.0f) {
 202     ASSIGN_ARRAY(ret, kUIScalesFor2x);
 203     return ret;
 204   } else if (info.device_scale_factor() == 1.25f) {
 205     ASSIGN_ARRAY(ret, kUIScalesFor1_25x);
 206     return ret;
 207   }
 208   switch (info.bounds_in_native().width()) {
 209     case 1280:
 210       ASSIGN_ARRAY(ret, kUIScalesFor1280);
 211       break;
 212     case 1366:
 213       ASSIGN_ARRAY(ret, kUIScalesFor1366);
 214       break;
 215     default:
 216       ASSIGN_ARRAY(ret, kUIScalesFor1280);
 217 #if defined(OS_CHROMEOS)
 218       if (base::SysInfo::IsRunningOnChromeOS())
 219         NOTREACHED() << "Unknown resolution:" << info.ToString();
 220 #endif
 221   }
 222   return ret;
 223 }
 224
 225 // static
 226 float DisplayManager::GetNextUIScale(const DisplayInfo& info, bool up) {
 227   float scale = info.configured_ui_scale();
 228   std::vector<float> scales = GetScalesForDisplay(info);
 229   for (size_t i = 0; i < scales.size(); ++i) {
 230     if (ScaleComparator(scales[i])(scale)) {
 231       if (up && i != scales.size() - 1)
 232         return scales[i + 1];
 233       if (!up && i != 0)
 234         return scales[i - 1];
 235       return scales[i];
 236     }
 237   }
 238   // Fallback to 1.0f if the |scale| wasn't in the list.
 239   return 1.0f;
 240 }
 241
 242 bool DisplayManager::InitFromCommandLine() {
 243   DisplayInfoList info_list;
 244   CommandLine* command_line = CommandLine::ForCurrentProcess();
 245   if (!command_line->HasSwitch(switches::kAshHostWindowBounds))
 246     return false;
 247   const string size_str =
 248       command_line->GetSwitchValueASCII(switches::kAshHostWindowBounds);
 249   vector<string> parts;
 250   base::SplitString(size_str, ',', &parts);
 251   for (vector<string>::const_iterator iter = parts.begin();
 252        iter != parts.end(); ++iter) {
 253     info_list.push_back(DisplayInfo::CreateFromSpec(*iter));
 254     info_list.back().set_native(true);
 255   }
 256   MaybeInitInternalDisplay(info_list[0].id());
 257   if (info_list.size() > 1 &&
 258       command_line->HasSwitch(switches::kAshEnableSoftwareMirroring)) {
 259     SetSecondDisplayMode(MIRRORING);
 260   }
 261   OnNativeDisplaysChanged(info_list);
 262   return true;
 263 }
 264
 265 void DisplayManager::InitDefaultDisplay() {
 266   DisplayInfoList info_list;
 267   info_list.push_back(DisplayInfo::CreateFromSpec(std::string()));
 268   info_list.back().set_native(true);
 269   MaybeInitInternalDisplay(info_list[0].id());
 270   OnNativeDisplaysChanged(info_list);
 271 }
 272
 273 void DisplayManager::InitFontParams() {
 274 #if defined(OS_CHROMEOS)
 275   if (!HasInternalDisplay())
 276     return;
 277   const DisplayInfo& display_info =
 278       GetDisplayInfo(gfx::Display::InternalDisplayId());
 279   gfx::SetFontRenderParamsDeviceScaleFactor(
 280       display_info.GetEffectiveDeviceScaleFactor());
 281 #endif  // OS_CHROMEOS
 282 }
 283
 284 // static
 285 void DisplayManager::UpdateDisplayBoundsForLayoutById(
 286     const DisplayLayout& layout,
 287     const gfx::Display& primary_display,
 288     int64 secondary_display_id) {
 289   DCHECK_NE(gfx::Display::kInvalidDisplayID, secondary_display_id);
 290   UpdateDisplayBoundsForLayout(
 291       layout, primary_display,
 292       Shell::GetInstance()->display_manager()->
 293       FindDisplayForId(secondary_display_id));
 294 }
 295
 296 bool DisplayManager::IsActiveDisplay(const gfx::Display& display) const {
 297   for (DisplayList::const_iterator iter = displays_.begin();
 298        iter != displays_.end(); ++iter) {
 299     if ((*iter).id() == display.id())
 300       return true;
 301   }
 302   return false;
 303 }
 304
 305 bool DisplayManager::HasInternalDisplay() const {
 306   return gfx::Display::InternalDisplayId() != gfx::Display::kInvalidDisplayID;
 307 }
 308
 309 bool DisplayManager::IsInternalDisplayId(int64 id) const {
 310   return gfx::Display::InternalDisplayId() == id;
 311 }
 312
 313 DisplayLayout DisplayManager::GetCurrentDisplayLayout() {
 314   DCHECK_EQ(2U, num_connected_displays());
 315   // Invert if the primary was swapped.
 316   if (num_connected_displays() > 1) {
 317     DisplayIdPair pair = GetCurrentDisplayIdPair();
 318     return layout_store_->ComputeDisplayLayoutForDisplayIdPair(pair);
 319   }
 320   NOTREACHED() << "DisplayLayout is requested for single display";
 321   // On release build, just fallback to default instead of blowing up.
 322   DisplayLayout layout =
 323       layout_store_->default_display_layout();
 324   layout.primary_id = displays_[0].id();
 325   return layout;
 326 }
 327
 328 DisplayIdPair DisplayManager::GetCurrentDisplayIdPair() const {
 329   if (IsMirrored()) {
 330     if (software_mirroring_enabled()) {
 331       CHECK_EQ(2u, num_connected_displays());
 332       // This comment is to make it easy to distinguish the crash
 333       // between two checks.
 334       CHECK_EQ(1u, displays_.size());
 335     }
 336     return std::make_pair(displays_[0].id(), mirrored_display_id_);
 337   } else {
 338     CHECK_GE(2u, displays_.size());
 339     int64 id_at_zero = displays_[0].id();
 340     if (id_at_zero == gfx::Display::InternalDisplayId() ||
 341         id_at_zero == first_display_id()) {
 342       return std::make_pair(id_at_zero, displays_[1].id());
 343     } else {
 344       return std::make_pair(displays_[1].id(), id_at_zero);
 345     }
 346   }
 347 }
 348
 349 void DisplayManager::SetLayoutForCurrentDisplays(
 350     const DisplayLayout& layout_relative_to_primary) {
 351   DCHECK_EQ(2U, GetNumDisplays());
 352   if (GetNumDisplays() < 2)
 353     return;
 354   const gfx::Display& primary = screen_->GetPrimaryDisplay();
 355   const DisplayIdPair pair = GetCurrentDisplayIdPair();
 356   // Invert if the primary was swapped.
 357   DisplayLayout to_set = pair.first == primary.id() ?
 358       layout_relative_to_primary : layout_relative_to_primary.Invert();
 359
 360   DisplayLayout current_layout =
 361       layout_store_->GetRegisteredDisplayLayout(pair);
 362   if (to_set.position != current_layout.position ||
 363       to_set.offset != current_layout.offset) {
 364     to_set.primary_id = primary.id();
 365     layout_store_->RegisterLayoutForDisplayIdPair(
 366         pair.first, pair.second, to_set);
 367     if (delegate_)
 368       delegate_->PreDisplayConfigurationChange(false);
 369     // PreDisplayConfigurationChange(false);
 370     // TODO(oshima): Call UpdateDisplays instead.
 371     const DisplayLayout layout = GetCurrentDisplayLayout();
 372     UpdateDisplayBoundsForLayoutById(
 373         layout, primary,
 374         ScreenUtil::GetSecondaryDisplay().id());
 375
 376     // Primary's bounds stay the same. Just notify bounds change
 377     // on the secondary.
 378     screen_ash_->NotifyMetricsChanged(
 379         ScreenUtil::GetSecondaryDisplay(),
 380         gfx::DisplayObserver::DISPLAY_METRIC_BOUNDS |
 381             gfx::DisplayObserver::DISPLAY_METRIC_WORK_AREA);
 382     if (delegate_)
 383       delegate_->PostDisplayConfigurationChange();
 384   }
 385 }
 386
 387 const gfx::Display& DisplayManager::GetDisplayForId(int64 id) const {
 388   gfx::Display* display =
 389       const_cast<DisplayManager*>(this)->FindDisplayForId(id);
 390   return display ? *display : GetInvalidDisplay();
 391 }
 392
 393 const gfx::Display& DisplayManager::FindDisplayContainingPoint(
 394     const gfx::Point& point_in_screen) const {
 395   for (DisplayList::const_iterator iter = displays_.begin();
 396        iter != displays_.end(); ++iter) {
 397     const gfx::Display& display = *iter;
 398     if (display.bounds().Contains(point_in_screen))
 399       return display;
 400   }
 401   return GetInvalidDisplay();
 402 }
 403
 404 bool DisplayManager::UpdateWorkAreaOfDisplay(int64 display_id,
 405                                              const gfx::Insets& insets) {
 406   gfx::Display* display = FindDisplayForId(display_id);
 407   DCHECK(display);
 408   gfx::Rect old_work_area = display->work_area();
 409   display->UpdateWorkAreaFromInsets(insets);
 410   return old_work_area != display->work_area();
 411 }
 412
 413 void DisplayManager::SetOverscanInsets(int64 display_id,
 414                                        const gfx::Insets& insets_in_dip) {
 415   display_info_[display_id].SetOverscanInsets(insets_in_dip);
 416   DisplayInfoList display_info_list;
 417   for (DisplayList::const_iterator iter = displays_.begin();
 418        iter != displays_.end(); ++iter) {
 419     display_info_list.push_back(GetDisplayInfo(iter->id()));
 420   }
 421   AddMirrorDisplayInfoIfAny(&display_info_list);
 422   UpdateDisplays(display_info_list);
 423 }
 424
 425 void DisplayManager::SetDisplayRotation(int64 display_id,
 426                                         gfx::Display::Rotation rotation) {
 427   DisplayInfoList display_info_list;
 428   for (DisplayList::const_iterator iter = displays_.begin();
 429        iter != displays_.end(); ++iter) {
 430     DisplayInfo info = GetDisplayInfo(iter->id());
 431     if (info.id() == display_id) {
 432       if (info.rotation() == rotation)
 433         return;
 434       info.set_rotation(rotation);
 435     }
 436     display_info_list.push_back(info);
 437   }
 438   AddMirrorDisplayInfoIfAny(&display_info_list);
 439   UpdateDisplays(display_info_list);
 440 }
 441
 442 void DisplayManager::SetDisplayUIScale(int64 display_id,
 443                                        float ui_scale) {
 444   if (!IsDisplayUIScalingEnabled() ||
 445       gfx::Display::InternalDisplayId() != display_id) {
 446     return;
 447   }
 448
 449   // TODO(mukai): merge this implementation into SetDisplayMode().
 450   DisplayInfoList display_info_list;
 451   for (DisplayList::const_iterator iter = displays_.begin();
 452        iter != displays_.end(); ++iter) {
 453     DisplayInfo info = GetDisplayInfo(iter->id());
 454     if (info.id() == display_id) {
 455       if (info.configured_ui_scale() == ui_scale)
 456         return;
 457       std::vector<float> scales = GetScalesForDisplay(info);
 458       ScaleComparator comparator(ui_scale);
 459       if (std::find_if(scales.begin(), scales.end(), comparator) ==
 460           scales.end()) {
 461         return;
 462       }
 463       info.set_configured_ui_scale(ui_scale);
 464     }
 465     display_info_list.push_back(info);
 466   }
 467   AddMirrorDisplayInfoIfAny(&display_info_list);
 468   UpdateDisplays(display_info_list);
 469 }
 470
 471 void DisplayManager::SetDisplayResolution(int64 display_id,
 472                                           const gfx::Size& resolution) {
 473   DCHECK_NE(gfx::Display::InternalDisplayId(), display_id);
 474   if (gfx::Display::InternalDisplayId() == display_id)
 475     return;
 476   const DisplayInfo& display_info = GetDisplayInfo(display_id);
 477   const std::vector<DisplayMode>& modes = display_info.display_modes();
 478   DCHECK_NE(0u, modes.size());
 479   DisplayMode target_mode;
 480   target_mode.size = resolution;
 481   std::vector<DisplayMode>::const_iterator iter =
 482       std::find_if(modes.begin(), modes.end(), DisplayModeMatcher(target_mode));
 483   if (iter == modes.end()) {
 484     LOG(WARNING) << "Unsupported resolution was requested:"
 485                  << resolution.ToString();
 486     return;
 487   }
 488   display_modes_[display_id] = *iter;
 489 #if defined(OS_CHROMEOS)
 490   if (base::SysInfo::IsRunningOnChromeOS())
 491     Shell::GetInstance()->display_configurator()->OnConfigurationChanged();
 492 #endif
 493 }
 494
 495 bool DisplayManager::SetDisplayMode(int64 display_id,
 496                                     const DisplayMode& display_mode) {
 497   if (IsInternalDisplayId(display_id)) {
 498     SetDisplayUIScale(display_id, display_mode.ui_scale);
 499     return false;
 500   }
 501
 502   DisplayInfoList display_info_list;
 503   bool display_property_changed = false;
 504   bool resolution_changed = false;
 505   for (DisplayList::const_iterator iter = displays_.begin();
 506        iter != displays_.end(); ++iter) {
 507     DisplayInfo info = GetDisplayInfo(iter->id());
 508     if (info.id() == display_id) {
 509       const std::vector<DisplayMode>& modes = info.display_modes();
 510       std::vector<DisplayMode>::const_iterator iter =
 511           std::find_if(modes.begin(),
 512                        modes.end(),
 513                        DisplayModeMatcher(display_mode));
 514       if (iter == modes.end()) {
 515         LOG(WARNING) << "Unsupported resolution was requested:"
 516                      << display_mode.size.ToString();
 517         return false;
 518       }
 519       display_modes_[display_id] = *iter;
 520       if (info.bounds_in_native().size() != display_mode.size)
 521         resolution_changed = true;
 522       if (info.device_scale_factor() != display_mode.device_scale_factor) {
 523         info.set_device_scale_factor(display_mode.device_scale_factor);
 524         display_property_changed = true;
 525       }
 526     }
 527     display_info_list.push_back(info);
 528   }
 529   if (display_property_changed) {
 530     AddMirrorDisplayInfoIfAny(&display_info_list);
 531     UpdateDisplays(display_info_list);
 532   }
 533 #if defined(OS_CHROMEOS)
 534   if (resolution_changed && base::SysInfo::IsRunningOnChromeOS())
 535     Shell::GetInstance()->display_configurator()->OnConfigurationChanged();
 536 #endif
 537   return resolution_changed;
 538 }
 539
 540 void DisplayManager::RegisterDisplayProperty(
 541     int64 display_id,
 542     gfx::Display::Rotation rotation,
 543     float ui_scale,
 544     const gfx::Insets* overscan_insets,
 545     const gfx::Size& resolution_in_pixels,
 546     float device_scale_factor,
 547     ui::ColorCalibrationProfile color_profile) {
 548   if (display_info_.find(display_id) == display_info_.end())
 549     display_info_[display_id] = DisplayInfo(display_id, std::string(), false);
 550
 551   display_info_[display_id].set_rotation(rotation);
 552   display_info_[display_id].SetColorProfile(color_profile);
 553   // Just in case the preference file was corrupted.
 554   // TODO(mukai): register |display_modes_| here as well, so the lookup for the
 555   // default mode in GetActiveModeForDisplayId() gets much simpler.
 556   if (0.5f <= ui_scale && ui_scale <= 2.0f)
 557     display_info_[display_id].set_configured_ui_scale(ui_scale);
 558   if (overscan_insets)
 559     display_info_[display_id].SetOverscanInsets(*overscan_insets);
 560   if (!resolution_in_pixels.IsEmpty()) {
 561     DCHECK(!IsInternalDisplayId(display_id));
 562     // Default refresh rate, until OnNativeDisplaysChanged() updates us with the
 563     // actual display info, is 60 Hz.
 564     DisplayMode mode(resolution_in_pixels, 60.0f, false, false);
 565     mode.device_scale_factor = device_scale_factor;
 566     display_modes_[display_id] = mode;
 567   }
 568 }
 569
 570 DisplayMode DisplayManager::GetActiveModeForDisplayId(int64 display_id) const {
 571   DisplayMode selected_mode;
 572   if (GetSelectedModeForDisplayId(display_id, &selected_mode))
 573     return selected_mode;
 574
 575   // If 'selected' mode is empty, it should return the default mode. This means
 576   // the native mode for the external display. Unfortunately this is not true
 577   // for the internal display because restoring UI-scale doesn't register the
 578   // restored mode to |display_mode_|, so it needs to look up the mode whose
 579   // UI-scale value matches. See the TODO in RegisterDisplayProperty().
 580   const DisplayInfo& info = GetDisplayInfo(display_id);
 581   const std::vector<DisplayMode>& display_modes = info.display_modes();
 582
 583   if (IsInternalDisplayId(display_id)) {
 584     for (size_t i = 0; i < display_modes.size(); ++i) {
 585       if (info.configured_ui_scale() == display_modes[i].ui_scale)
 586         return display_modes[i];
 587     }
 588   } else {
 589     for (size_t i = 0; i < display_modes.size(); ++i) {
 590       if (display_modes[i].native)
 591         return display_modes[i];
 592     }
 593   }
 594   return selected_mode;
 595 }
 596
 597 void DisplayManager::RegisterDisplayRotationProperties(bool rotation_lock,
 598     gfx::Display::Rotation rotation) {
 599   if (delegate_)
 600     delegate_->PreDisplayConfigurationChange(false);
 601   registered_internal_display_rotation_lock_ = rotation_lock;
 602   registered_internal_display_rotation_ = rotation;
 603   if (delegate_)
 604     delegate_->PostDisplayConfigurationChange();
 605 }
 606
 607 bool DisplayManager::GetSelectedModeForDisplayId(int64 id,
 608                                                  DisplayMode* mode_out) const {
 609   std::map<int64, DisplayMode>::const_iterator iter = display_modes_.find(id);
 610   if (iter == display_modes_.end())
 611     return false;
 612   *mode_out = iter->second;
 613   return true;
 614 }
 615
 616 bool DisplayManager::IsDisplayUIScalingEnabled() const {
 617   return GetDisplayIdForUIScaling() != gfx::Display::kInvalidDisplayID;
 618 }
 619
 620 gfx::Insets DisplayManager::GetOverscanInsets(int64 display_id) const {
 621   std::map<int64, DisplayInfo>::const_iterator it =
 622       display_info_.find(display_id);
 623   return (it != display_info_.end()) ?
 624       it->second.overscan_insets_in_dip() : gfx::Insets();
 625 }
 626
 627 void DisplayManager::SetColorCalibrationProfile(
 628     int64 display_id,
 629     ui::ColorCalibrationProfile profile) {
 630 #if defined(OS_CHROMEOS)
 631   if (!display_info_[display_id].IsColorProfileAvailable(profile))
 632     return;
 633
 634   if (delegate_)
 635     delegate_->PreDisplayConfigurationChange(false);
 636   // Just sets color profile if it's not running on ChromeOS (like tests).
 637   if (!base::SysInfo::IsRunningOnChromeOS() ||
 638       Shell::GetInstance()->display_configurator()->SetColorCalibrationProfile(
 639           display_id, profile)) {
 640     display_info_[display_id].SetColorProfile(profile);
 641     UMA_HISTOGRAM_ENUMERATION(
 642         "ChromeOS.Display.ColorProfile", profile, ui::NUM_COLOR_PROFILES);
 643   }
 644   if (delegate_)
 645     delegate_->PostDisplayConfigurationChange();
 646 #endif
 647 }
 648
 649 void DisplayManager::OnNativeDisplaysChanged(
 650     const std::vector<DisplayInfo>& updated_displays) {
 651   if (updated_displays.empty()) {
 652     VLOG(1) << "OnNativeDisplaysChanged(0): # of current displays="
 653             << displays_.size();
 654     // If the device is booted without display, or chrome is started
 655     // without --ash-host-window-bounds on linux desktop, use the
 656     // default display.
 657     if (displays_.empty()) {
 658       std::vector<DisplayInfo> init_displays;
 659       init_displays.push_back(DisplayInfo::CreateFromSpec(std::string()));
 660       MaybeInitInternalDisplay(init_displays[0].id());
 661       OnNativeDisplaysChanged(init_displays);
 662     } else {
 663       // Otherwise don't update the displays when all displays are disconnected.
 664       // This happens when:
 665       // - the device is idle and powerd requested to turn off all displays.
 666       // - the device is suspended. (kernel turns off all displays)
 667       // - the internal display's brightness is set to 0 and no external
 668       //   display is connected.
 669       // - the internal display's brightness is 0 and external display is
 670       //   disconnected.
 671       // The display will be updated when one of displays is turned on, and the
 672       // display list will be updated correctly.
 673     }
 674     return;
 675   }
 676   first_display_id_ = updated_displays[0].id();
 677   std::set<gfx::Point> origins;
 678
 679   if (updated_displays.size() == 1) {
 680     VLOG(1) << "OnNativeDisplaysChanged(1):" << updated_displays[0].ToString();
 681   } else {
 682     VLOG(1) << "OnNativeDisplaysChanged(" << updated_displays.size()
 683             << ") [0]=" << updated_displays[0].ToString()
 684             << ", [1]=" << updated_displays[1].ToString();
 685   }
 686
 687   bool internal_display_connected = false;
 688   num_connected_displays_ = updated_displays.size();
 689   mirrored_display_id_ = gfx::Display::kInvalidDisplayID;
 690   non_desktop_display_ = gfx::Display();
 691   DisplayInfoList new_display_info_list;
 692   for (DisplayInfoList::const_iterator iter = updated_displays.begin();
 693        iter != updated_displays.end();
 694        ++iter) {
 695     if (!internal_display_connected)
 696       internal_display_connected = IsInternalDisplayId(iter->id());
 697     // Mirrored monitors have the same origins.
 698     gfx::Point origin = iter->bounds_in_native().origin();
 699     if (origins.find(origin) != origins.end()) {
 700       InsertAndUpdateDisplayInfo(*iter);
 701       mirrored_display_id_ = iter->id();
 702     } else {
 703       origins.insert(origin);
 704       new_display_info_list.push_back(*iter);
 705     }
 706
 707     DisplayMode new_mode;
 708     new_mode.size = iter->bounds_in_native().size();
 709     new_mode.device_scale_factor = iter->device_scale_factor();
 710     new_mode.ui_scale = iter->configured_ui_scale();
 711     const std::vector<DisplayMode>& display_modes = iter->display_modes();
 712     // This is empty the displays are initialized from InitFromCommandLine.
 713     if (!display_modes.size())
 714       continue;
 715     std::vector<DisplayMode>::const_iterator display_modes_iter =
 716         std::find_if(display_modes.begin(),
 717                      display_modes.end(),
 718                      DisplayModeMatcher(new_mode));
 719     // Update the actual resolution selected as the resolution request may fail.
 720     if (display_modes_iter == display_modes.end())
 721       display_modes_.erase(iter->id());
 722     else if (display_modes_.find(iter->id()) != display_modes_.end())
 723       display_modes_[iter->id()] = *display_modes_iter;
 724   }
 725   if (HasInternalDisplay() &&
 726       !internal_display_connected &&
 727       display_info_.find(gfx::Display::InternalDisplayId()) ==
 728       display_info_.end()) {
 729     DisplayInfo internal_display_info(
 730         gfx::Display::InternalDisplayId(),
 731         l10n_util::GetStringUTF8(IDS_ASH_INTERNAL_DISPLAY_NAME),
 732         false  /*Internal display must not have overscan */);
 733     internal_display_info.SetBounds(gfx::Rect(0, 0, 800, 600));
 734     display_info_[gfx::Display::InternalDisplayId()] = internal_display_info;
 735   }
 736   UpdateDisplays(new_display_info_list);
 737 }
 738
 739 void DisplayManager::UpdateDisplays() {
 740   DisplayInfoList display_info_list;
 741   for (DisplayList::const_iterator iter = displays_.begin();
 742        iter != displays_.end(); ++iter) {
 743     display_info_list.push_back(GetDisplayInfo(iter->id()));
 744   }
 745   AddMirrorDisplayInfoIfAny(&display_info_list);
 746   UpdateDisplays(display_info_list);
 747 }
 748
 749 void DisplayManager::UpdateDisplays(
 750     const std::vector<DisplayInfo>& updated_display_info_list) {
 751 #if defined(OS_WIN)
 752   DCHECK_EQ(1u, updated_display_info_list.size()) <<
 753       ": Multiple display test does not work on Windows bots. Please "
 754       "skip (don't disable) the test using SupportsMultipleDisplays()";
 755 #endif
 756
 757   DisplayInfoList new_display_info_list = updated_display_info_list;
 758   std::sort(displays_.begin(), displays_.end(), DisplaySortFunctor());
 759   std::sort(new_display_info_list.begin(),
 760             new_display_info_list.end(),
 761             DisplayInfoSortFunctor());
 762   DisplayList removed_displays;
 763   std::map<size_t, uint32_t> display_changes;
 764   std::vector<size_t> added_display_indices;
 765
 766   DisplayList::iterator curr_iter = displays_.begin();
 767   DisplayInfoList::const_iterator new_info_iter = new_display_info_list.begin();
 768
 769   DisplayList new_displays;
 770
 771   // Use the internal display or 1st as the mirror source, then scale
 772   // the root window so that it matches the external display's
 773   // resolution. This is necessary in order for scaling to work while
 774   // mirrored.
 775   int64 non_desktop_display_id = gfx::Display::kInvalidDisplayID;
 776
 777   if (second_display_mode_ != EXTENDED && new_display_info_list.size() == 2) {
 778     bool zero_is_source =
 779         first_display_id_ == new_display_info_list[0].id() ||
 780         gfx::Display::InternalDisplayId() == new_display_info_list[0].id();
 781     if (second_display_mode_ == MIRRORING) {
 782       mirrored_display_id_ = new_display_info_list[zero_is_source ? 1 : 0].id();
 783       non_desktop_display_id = mirrored_display_id_;
 784     } else {
 785       // TODO(oshima|bshe): The virtual keyboard is currently assigned to
 786       // the 1st display.
 787       non_desktop_display_id =
 788           new_display_info_list[zero_is_source ? 0 : 1].id();
 789     }
 790   }
 791
 792   while (curr_iter != displays_.end() ||
 793          new_info_iter != new_display_info_list.end()) {
 794     if (new_info_iter != new_display_info_list.end() &&
 795         non_desktop_display_id == new_info_iter->id()) {
 796       DisplayInfo info = *new_info_iter;
 797       info.SetOverscanInsets(gfx::Insets());
 798       InsertAndUpdateDisplayInfo(info);
 799       non_desktop_display_ =
 800           CreateDisplayFromDisplayInfoById(non_desktop_display_id);
 801       ++new_info_iter;
 802       // Remove existing external display if it is going to be used as
 803       // non desktop.
 804       if (curr_iter != displays_.end() &&
 805           curr_iter->id() == non_desktop_display_id) {
 806         removed_displays.push_back(*curr_iter);
 807         ++curr_iter;
 808       }
 809       continue;
 810     }
 811
 812     if (curr_iter == displays_.end()) {
 813       // more displays in new list.
 814       added_display_indices.push_back(new_displays.size());
 815       InsertAndUpdateDisplayInfo(*new_info_iter);
 816       new_displays.push_back(
 817           CreateDisplayFromDisplayInfoById(new_info_iter->id()));
 818       ++new_info_iter;
 819     } else if (new_info_iter == new_display_info_list.end()) {
 820       // more displays in current list.
 821       removed_displays.push_back(*curr_iter);
 822       ++curr_iter;
 823     } else if (curr_iter->id() == new_info_iter->id()) {
 824       const gfx::Display& current_display = *curr_iter;
 825       // Copy the info because |CreateDisplayFromInfo| updates the instance.
 826       const DisplayInfo current_display_info =
 827           GetDisplayInfo(current_display.id());
 828       InsertAndUpdateDisplayInfo(*new_info_iter);
 829       gfx::Display new_display =
 830           CreateDisplayFromDisplayInfoById(new_info_iter->id());
 831       const DisplayInfo& new_display_info = GetDisplayInfo(new_display.id());
 832
 833       uint32_t metrics = gfx::DisplayObserver::DISPLAY_METRIC_NONE;
 834
 835       // At that point the new Display objects we have are not entirely updated,
 836       // they are missing the translation related to the Display disposition in
 837       // the layout.
 838       // Using display.bounds() and display.work_area() would fail most of the
 839       // time.
 840       if (force_bounds_changed_ || (current_display_info.bounds_in_native() !=
 841                                     new_display_info.bounds_in_native()) ||
 842           (current_display_info.size_in_pixel() !=
 843            new_display.GetSizeInPixel())) {
 844         metrics |= gfx::DisplayObserver::DISPLAY_METRIC_BOUNDS |
 845                    gfx::DisplayObserver::DISPLAY_METRIC_WORK_AREA;
 846       }
 847
 848       if (current_display.device_scale_factor() !=
 849           new_display.device_scale_factor()) {
 850         metrics |= gfx::DisplayObserver::DISPLAY_METRIC_DEVICE_SCALE_FACTOR;
 851       }
 852
 853       if (current_display.rotation() != new_display.rotation())
 854         metrics |= gfx::DisplayObserver::DISPLAY_METRIC_ROTATION;
 855
 856       if (metrics != gfx::DisplayObserver::DISPLAY_METRIC_NONE) {
 857         display_changes.insert(
 858             std::pair<size_t, uint32_t>(new_displays.size(), metrics));
 859       }
 860
 861       new_display.UpdateWorkAreaFromInsets(current_display.GetWorkAreaInsets());
 862       new_displays.push_back(new_display);
 863       ++curr_iter;
 864       ++new_info_iter;
 865     } else if (curr_iter->id() < new_info_iter->id()) {
 866       // more displays in current list between ids, which means it is deleted.
 867       removed_displays.push_back(*curr_iter);
 868       ++curr_iter;
 869     } else {
 870       // more displays in new list between ids, which means it is added.
 871       added_display_indices.push_back(new_displays.size());
 872       InsertAndUpdateDisplayInfo(*new_info_iter);
 873       new_displays.push_back(
 874           CreateDisplayFromDisplayInfoById(new_info_iter->id()));
 875       ++new_info_iter;
 876     }
 877   }
 878
 879   scoped_ptr<NonDesktopDisplayUpdater> non_desktop_display_updater(
 880       new NonDesktopDisplayUpdater(this, delegate_));
 881
 882   // Clear focus if the display has been removed, but don't clear focus if
 883   // the destkop has been moved from one display to another
 884   // (mirror -> docked, docked -> single internal).
 885   bool clear_focus =
 886       !removed_displays.empty() &&
 887       !(removed_displays.size() == 1 && added_display_indices.size() == 1);
 888   if (delegate_)
 889     delegate_->PreDisplayConfigurationChange(clear_focus);
 890
 891   // Do not update |displays_| if there's nothing to be updated. Without this,
 892   // it will not update the display layout, which causes the bug
 893   // http://crbug.com/155948.
 894   if (display_changes.empty() && added_display_indices.empty() &&
 895       removed_displays.empty()) {
 896     // When changing from software mirroring mode to sinlge display mode, it
 897     // is possible there is no need to update |displays_| and we early out
 898     // here. But we still want to run the PostDisplayConfigurationChange()
 899     // cause there are some clients need to act on this, e.g.
 900     // TouchTransformerController needs to adjust the TouchTransformer when
 901     // switching from dual displays to single display.
 902     if (delegate_)
 903       delegate_->PostDisplayConfigurationChange();
 904     return;
 905   }
 906
 907   size_t updated_index;
 908   if (UpdateSecondaryDisplayBoundsForLayout(&new_displays, &updated_index) &&
 909       std::find(added_display_indices.begin(),
 910                 added_display_indices.end(),
 911                 updated_index) == added_display_indices.end()) {
 912     uint32_t metrics = gfx::DisplayObserver::DISPLAY_METRIC_BOUNDS |
 913                        gfx::DisplayObserver::DISPLAY_METRIC_WORK_AREA;
 914     if (display_changes.find(updated_index) != display_changes.end())
 915       metrics |= display_changes[updated_index];
 916
 917     display_changes[updated_index] = metrics;
 918   }
 919
 920   displays_ = new_displays;
 921
 922   base::AutoReset<bool> resetter(&change_display_upon_host_resize_, false);
 923
 924   // Temporarily add displays to be removed because display object
 925   // being removed are accessed during shutting down the root.
 926   displays_.insert(displays_.end(), removed_displays.begin(),
 927                    removed_displays.end());
 928
 929   for (DisplayList::const_reverse_iterator iter = removed_displays.rbegin();
 930        iter != removed_displays.rend(); ++iter) {
 931     screen_ash_->NotifyDisplayRemoved(displays_.back());
 932     displays_.pop_back();
 933   }
 934   // Close the non desktop window here to avoid creating two compositor on
 935   // one display.
 936   if (!non_desktop_display_updater->enabled())
 937     non_desktop_display_updater.reset();
 938   for (std::vector<size_t>::iterator iter = added_display_indices.begin();
 939        iter != added_display_indices.end(); ++iter) {
 940     screen_ash_->NotifyDisplayAdded(displays_[*iter]);
 941   }
 942   // Create the non destkop window after all displays are added so that
 943   // it can mirror the display newly added. This can happen when switching
 944   // from dock mode to software mirror mode.
 945   non_desktop_display_updater.reset();
 946   for (std::map<size_t, uint32_t>::iterator iter = display_changes.begin();
 947        iter != display_changes.end();
 948        ++iter) {
 949     screen_ash_->NotifyMetricsChanged(displays_[iter->first], iter->second);
 950   }
 951   if (delegate_)
 952     delegate_->PostDisplayConfigurationChange();
 953
 954 #if defined(USE_X11) && defined(OS_CHROMEOS)
 955   if (!display_changes.empty() && base::SysInfo::IsRunningOnChromeOS())
 956     ui::ClearX11DefaultRootWindow();
 957 #endif
 958 }
 959
 960 const gfx::Display& DisplayManager::GetDisplayAt(size_t index) const {
 961   DCHECK_LT(index, displays_.size());
 962   return displays_[index];
 963 }
 964
 965 const gfx::Display& DisplayManager::GetPrimaryDisplayCandidate() const {
 966   if (GetNumDisplays() == 1)
 967     return displays_[0];
 968   DisplayLayout layout = layout_store_->GetRegisteredDisplayLayout(
 969       GetCurrentDisplayIdPair());
 970   return GetDisplayForId(layout.primary_id);
 971 }
 972
 973 size_t DisplayManager::GetNumDisplays() const {
 974   return displays_.size();
 975 }
 976
 977 bool DisplayManager::IsMirrored() const {
 978   return mirrored_display_id_ != gfx::Display::kInvalidDisplayID;
 979 }
 980
 981 const DisplayInfo& DisplayManager::GetDisplayInfo(int64 display_id) const {
 982   DCHECK_NE(gfx::Display::kInvalidDisplayID, display_id);
 983
 984   std::map<int64, DisplayInfo>::const_iterator iter =
 985       display_info_.find(display_id);
 986   CHECK(iter != display_info_.end()) << display_id;
 987   return iter->second;
 988 }
 989
 990 std::string DisplayManager::GetDisplayNameForId(int64 id) {
 991   if (id == gfx::Display::kInvalidDisplayID)
 992     return l10n_util::GetStringUTF8(IDS_ASH_STATUS_TRAY_UNKNOWN_DISPLAY_NAME);
 993
 994   std::map<int64, DisplayInfo>::const_iterator iter = display_info_.find(id);
 995   if (iter != display_info_.end() && !iter->second.name().empty())
 996     return iter->second.name();
 997
 998   return base::StringPrintf("Display %d", static_cast<int>(id));
 999 }
1000
1001 int64 DisplayManager::GetDisplayIdForUIScaling() const {
1002   // UI Scaling is effective only on internal display.
1003   int64 display_id = gfx::Display::InternalDisplayId();
1004 #if defined(OS_WIN)
1005   display_id = first_display_id();
1006 #endif
1007   return display_id;
1008 }
1009
1010 void DisplayManager::SetMirrorMode(bool mirrored) {
1011   if (num_connected_displays() <= 1)
1012     return;
1013
1014 #if defined(OS_CHROMEOS)
1015   if (base::SysInfo::IsRunningOnChromeOS()) {
1016     ui::MultipleDisplayState new_state =
1017         mirrored ? ui::MULTIPLE_DISPLAY_STATE_DUAL_MIRROR :
1018                    ui::MULTIPLE_DISPLAY_STATE_DUAL_EXTENDED;
1019     Shell::GetInstance()->display_configurator()->SetDisplayMode(new_state);
1020     return;
1021   }
1022 #endif
1023   // This is fallback path to emulate mirroroing on desktop.
1024   SetSecondDisplayMode(mirrored ? MIRRORING : EXTENDED);
1025   DisplayInfoList display_info_list;
1026   int count = 0;
1027   for (std::map<int64, DisplayInfo>::const_iterator iter =
1028            display_info_.begin();
1029        count < 2; ++iter, ++count) {
1030     display_info_list.push_back(GetDisplayInfo(iter->second.id()));
1031   }
1032   UpdateDisplays(display_info_list);
1033 #if defined(OS_CHROMEOS)
1034   if (Shell::GetInstance()->display_configurator_animation()) {
1035     Shell::GetInstance()->display_configurator_animation()->
1036         StartFadeInAnimation();
1037   }
1038 #endif
1039 }
1040
1041 void DisplayManager::AddRemoveDisplay() {
1042   DCHECK(!displays_.empty());
1043   std::vector<DisplayInfo> new_display_info_list;
1044   const DisplayInfo& first_display = GetDisplayInfo(displays_[0].id());
1045   new_display_info_list.push_back(first_display);
1046   // Add if there is only one display connected.
1047   if (num_connected_displays() == 1) {
1048     // Layout the 2nd display below the primary as with the real device.
1049     gfx::Rect host_bounds = first_display.bounds_in_native();
1050     new_display_info_list.push_back(DisplayInfo::CreateFromSpec(
1051         base::StringPrintf(
1052             "%d+%d-500x400", host_bounds.x(), host_bounds.bottom())));
1053   }
1054   num_connected_displays_ = new_display_info_list.size();
1055   mirrored_display_id_ = gfx::Display::kInvalidDisplayID;
1056   non_desktop_display_ = gfx::Display();
1057   UpdateDisplays(new_display_info_list);
1058 }
1059
1060 void DisplayManager::ToggleDisplayScaleFactor() {
1061   DCHECK(!displays_.empty());
1062   std::vector<DisplayInfo> new_display_info_list;
1063   for (DisplayList::const_iterator iter = displays_.begin();
1064        iter != displays_.end(); ++iter) {
1065     DisplayInfo display_info = GetDisplayInfo(iter->id());
1066     display_info.set_device_scale_factor(
1067         display_info.device_scale_factor() == 1.0f ? 2.0f : 1.0f);
1068     new_display_info_list.push_back(display_info);
1069   }
1070   AddMirrorDisplayInfoIfAny(&new_display_info_list);
1071   UpdateDisplays(new_display_info_list);
1072 }
1073
1074 #if defined(OS_CHROMEOS)
1075 void DisplayManager::SetSoftwareMirroring(bool enabled) {
1076   SetSecondDisplayMode(enabled ? MIRRORING : EXTENDED);
1077 }
1078
1079 bool DisplayManager::SoftwareMirroringEnabled() const {
1080   return software_mirroring_enabled();
1081 }
1082 #endif
1083
1084 void DisplayManager::SetSecondDisplayMode(SecondDisplayMode mode) {
1085   second_display_mode_ = mode;
1086   mirrored_display_id_ = gfx::Display::kInvalidDisplayID;
1087   non_desktop_display_ = gfx::Display();
1088 }
1089
1090 bool DisplayManager::UpdateDisplayBounds(int64 display_id,
1091                                          const gfx::Rect& new_bounds) {
1092   if (change_display_upon_host_resize_) {
1093     display_info_[display_id].SetBounds(new_bounds);
1094     // Don't notify observers if the mirrored window has changed.
1095     if (software_mirroring_enabled() && mirrored_display_id_ == display_id)
1096       return false;
1097     gfx::Display* display = FindDisplayForId(display_id);
1098     display->SetSize(display_info_[display_id].size_in_pixel());
1099     screen_ash_->NotifyMetricsChanged(
1100         *display, gfx::DisplayObserver::DISPLAY_METRIC_BOUNDS);
1101     return true;
1102   }
1103   return false;
1104 }
1105
1106 void DisplayManager::CreateMirrorWindowIfAny() {
1107   NonDesktopDisplayUpdater updater(this, delegate_);
1108 }
1109
1110 void DisplayManager::CreateScreenForShutdown() const {
1111   bool native_is_ash =
1112       gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_NATIVE) ==
1113       screen_ash_.get();
1114   delete screen_for_shutdown;
1115   screen_for_shutdown = screen_ash_->CloneForShutdown();
1116   gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_ALTERNATE,
1117                                  screen_for_shutdown);
1118   if (native_is_ash) {
1119     gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE,
1120                                    screen_for_shutdown);
1121   }
1122 }
1123
1124 gfx::Display* DisplayManager::FindDisplayForId(int64 id) {
1125   for (DisplayList::iterator iter = displays_.begin();
1126        iter != displays_.end(); ++iter) {
1127     if ((*iter).id() == id)
1128       return &(*iter);
1129   }
1130   DLOG(WARNING) << "Could not find display:" << id;
1131   return NULL;
1132 }
1133
1134 void DisplayManager::AddMirrorDisplayInfoIfAny(
1135     std::vector<DisplayInfo>* display_info_list) {
1136   if (software_mirroring_enabled() && IsMirrored())
1137     display_info_list->push_back(GetDisplayInfo(mirrored_display_id_));
1138 }
1139
1140 void DisplayManager::InsertAndUpdateDisplayInfo(const DisplayInfo& new_info) {
1141   std::map<int64, DisplayInfo>::iterator info =
1142       display_info_.find(new_info.id());
1143   if (info != display_info_.end()) {
1144     info->second.Copy(new_info);
1145   } else {
1146     display_info_[new_info.id()] = new_info;
1147     display_info_[new_info.id()].set_native(false);
1148   }
1149   display_info_[new_info.id()].UpdateDisplaySize();
1150
1151   OnDisplayInfoUpdated(display_info_[new_info.id()]);
1152 }
1153
1154 void DisplayManager::OnDisplayInfoUpdated(const DisplayInfo& display_info) {
1155 #if defined(OS_CHROMEOS)
1156   ui::ColorCalibrationProfile color_profile = display_info.color_profile();
1157   if (color_profile != ui::COLOR_PROFILE_STANDARD) {
1158     Shell::GetInstance()->display_configurator()->SetColorCalibrationProfile(
1159         display_info.id(), color_profile);
1160   }
1161 #endif
1162 }
1163
1164 gfx::Display DisplayManager::CreateDisplayFromDisplayInfoById(int64 id) {
1165   DCHECK(display_info_.find(id) != display_info_.end());
1166   const DisplayInfo& display_info = display_info_[id];
1167
1168   gfx::Display new_display(display_info.id());
1169   gfx::Rect bounds_in_native(display_info.size_in_pixel());
1170   float device_scale_factor = display_info.GetEffectiveDeviceScaleFactor();
1171
1172   // Simply set the origin to (0,0).  The primary display's origin is
1173   // always (0,0) and the secondary display's bounds will be updated
1174   // in |UpdateSecondaryDisplayBoundsForLayout| called in |UpdateDisplay|.
1175   new_display.SetScaleAndBounds(
1176       device_scale_factor, gfx::Rect(bounds_in_native.size()));
1177   new_display.set_rotation(display_info.rotation());
1178   new_display.set_touch_support(display_info.touch_support());
1179   return new_display;
1180 }
1181
1182 bool DisplayManager::UpdateSecondaryDisplayBoundsForLayout(
1183     DisplayList* displays,
1184     size_t* updated_index) const {
1185   if (displays->size() != 2U)
1186     return false;
1187
1188   int64 id_at_zero = displays->at(0).id();
1189   DisplayIdPair pair =
1190       (id_at_zero == first_display_id_ ||
1191        id_at_zero == gfx::Display::InternalDisplayId()) ?
1192       std::make_pair(id_at_zero, displays->at(1).id()) :
1193       std::make_pair(displays->at(1).id(), id_at_zero);
1194   DisplayLayout layout =
1195       layout_store_->ComputeDisplayLayoutForDisplayIdPair(pair);
1196
1197   // Ignore if a user has a old format (should be extremely rare)
1198   // and this will be replaced with DCHECK.
1199   if (layout.primary_id != gfx::Display::kInvalidDisplayID) {
1200     size_t primary_index, secondary_index;
1201     if (displays->at(0).id() == layout.primary_id) {
1202       primary_index = 0;
1203       secondary_index = 1;
1204     } else {
1205       primary_index = 1;
1206       secondary_index = 0;
1207     }
1208     // This function may be called before the secondary display is
1209     // registered. The bounds is empty in that case and will
1210     // return true.
1211     gfx::Rect bounds =
1212         GetDisplayForId(displays->at(secondary_index).id()).bounds();
1213     UpdateDisplayBoundsForLayout(
1214         layout, displays->at(primary_index), &displays->at(secondary_index));
1215     *updated_index = secondary_index;
1216     return bounds != displays->at(secondary_index).bounds();
1217   }
1218   return false;
1219 }
1220
1221 // static
1222 void DisplayManager::UpdateDisplayBoundsForLayout(
1223     const DisplayLayout& layout,
1224     const gfx::Display& primary_display,
1225     gfx::Display* secondary_display) {
1226   DCHECK_EQ("0,0", primary_display.bounds().origin().ToString());
1227
1228   const gfx::Rect& primary_bounds = primary_display.bounds();
1229   const gfx::Rect& secondary_bounds = secondary_display->bounds();
1230   gfx::Point new_secondary_origin = primary_bounds.origin();
1231
1232   DisplayLayout::Position position = layout.position;
1233
1234   // Ignore the offset in case the secondary display doesn't share edges with
1235   // the primary display.
1236   int offset = layout.offset;
1237   if (position == DisplayLayout::TOP || position == DisplayLayout::BOTTOM) {
1238     offset = std::min(
1239         offset, primary_bounds.width() - kMinimumOverlapForInvalidOffset);
1240     offset = std::max(
1241         offset, -secondary_bounds.width() + kMinimumOverlapForInvalidOffset);
1242   } else {
1243     offset = std::min(
1244         offset, primary_bounds.height() - kMinimumOverlapForInvalidOffset);
1245     offset = std::max(
1246         offset, -secondary_bounds.height() + kMinimumOverlapForInvalidOffset);
1247   }
1248   switch (position) {
1249     case DisplayLayout::TOP:
1250       new_secondary_origin.Offset(offset, -secondary_bounds.height());
1251       break;
1252     case DisplayLayout::RIGHT:
1253       new_secondary_origin.Offset(primary_bounds.width(), offset);
1254       break;
1255     case DisplayLayout::BOTTOM:
1256       new_secondary_origin.Offset(offset, primary_bounds.height());
1257       break;
1258     case DisplayLayout::LEFT:
1259       new_secondary_origin.Offset(-secondary_bounds.width(), offset);
1260       break;
1261   }
1262   gfx::Insets insets = secondary_display->GetWorkAreaInsets();
1263   secondary_display->set_bounds(
1264       gfx::Rect(new_secondary_origin, secondary_bounds.size()));
1265   secondary_display->UpdateWorkAreaFromInsets(insets);
1266 }
1267
1268 }  // namespace ash