display_manager.cc revision c5cede9ae108bb15f6b7a8aea21c7e1fefa2834c 
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 <cmath>
8#include <set>
9#include <string>
10#include <vector>
11
12#include "ash/ash_switches.h"
13#include "ash/display/display_layout_store.h"
14#include "ash/display/screen_ash.h"
15#include "ash/screen_util.h"
16#include "ash/shell.h"
17#include "base/auto_reset.h"
18#include "base/command_line.h"
19#include "base/logging.h"
20#include "base/metrics/histogram.h"
21#include "base/strings/string_number_conversions.h"
22#include "base/strings/string_split.h"
23#include "base/strings/stringprintf.h"
24#include "base/strings/utf_string_conversions.h"
25#include "grit/ash_strings.h"
26#include "ui/base/l10n/l10n_util.h"
27#include "ui/gfx/display.h"
28#include "ui/gfx/rect.h"
29#include "ui/gfx/screen.h"
30#include "ui/gfx/size_conversions.h"
31
32#if defined(USE_X11)
33#include "ui/base/x/x11_util.h"
34#endif
35
36#if defined(OS_CHROMEOS)
37#include "ash/display/output_configurator_animation.h"
38#include "base/sys_info.h"
39#endif
40
41#if defined(OS_WIN)
42#include "base/win/windows_version.h"
43#endif
44
45namespace ash {
46typedef std::vector<gfx::Display> DisplayList;
47typedef std::vector<DisplayInfo> DisplayInfoList;
48
49namespace {
50
51// We need to keep this in order for unittests to tell if
52// the object in gfx::Screen::GetScreenByType is for shutdown.
53gfx::Screen* screen_for_shutdown = NULL;
54
55// The number of pixels to overlap between the primary and secondary displays,
56// in case that the offset value is too large.
57const int kMinimumOverlapForInvalidOffset = 100;
58
59// List of value UI Scale values. Scales for 2x are equivalent to 640,
60// 800, 1024, 1280, 1440, 1600 and 1920 pixel width respectively on
61// 2560 pixel width 2x density display. Please see crbug.com/233375
62// for the full list of resolutions.
63const float kUIScalesFor2x[] =
64    {0.5f, 0.625f, 0.8f, 1.0f, 1.125f, 1.25f, 1.5f, 2.0f};
65const float kUIScalesFor1280[] = {0.5f, 0.625f, 0.8f, 1.0f, 1.125f };
66const float kUIScalesFor1366[] = {0.5f, 0.6f, 0.75f, 1.0f, 1.125f };
67
68struct DisplaySortFunctor {
69  bool operator()(const gfx::Display& a, const gfx::Display& b) {
70    return a.id() < b.id();
71  }
72};
73
74struct DisplayInfoSortFunctor {
75  bool operator()(const DisplayInfo& a, const DisplayInfo& b) {
76    return a.id() < b.id();
77  }
78};
79
80struct DisplayModeMatcher {
81  DisplayModeMatcher(const gfx::Size& size) : size(size) {}
82  bool operator()(const DisplayMode& mode) { return mode.size == size; }
83  gfx::Size size;
84};
85
86struct ScaleComparator {
87  explicit ScaleComparator(float s) : scale(s) {}
88
89  bool operator()(float s) const {
90    const float kEpsilon = 0.0001f;
91    return std::abs(scale - s) < kEpsilon;
92  }
93  float scale;
94};
95
96gfx::Display& GetInvalidDisplay() {
97  static gfx::Display* invalid_display = new gfx::Display();
98  return *invalid_display;
99}
100
101void MaybeInitInternalDisplay(int64 id) {
102  CommandLine* command_line = CommandLine::ForCurrentProcess();
103  if (command_line->HasSwitch(switches::kAshUseFirstDisplayAsInternal))
104    gfx::Display::SetInternalDisplayId(id);
105}
106
107// Scoped objects used to either create or close the non desktop window
108// at specific timing.
109class NonDesktopDisplayUpdater {
110 public:
111  NonDesktopDisplayUpdater(DisplayManager* manager,
112                           DisplayManager::Delegate* delegate)
113      : manager_(manager),
114        delegate_(delegate),
115        enabled_(manager_->second_display_mode() != DisplayManager::EXTENDED &&
116                 manager_->non_desktop_display().is_valid()) {
117  }
118
119  ~NonDesktopDisplayUpdater() {
120    if (!delegate_)
121      return;
122
123    if (enabled_) {
124      DisplayInfo display_info = manager_->GetDisplayInfo(
125          manager_->non_desktop_display().id());
126      delegate_->CreateOrUpdateNonDesktopDisplay(display_info);
127    } else {
128      delegate_->CloseNonDesktopDisplay();
129    }
130  }
131
132  bool enabled() const { return enabled_; }
133
134 private:
135  DisplayManager* manager_;
136  DisplayManager::Delegate* delegate_;
137  bool enabled_;
138  DISALLOW_COPY_AND_ASSIGN(NonDesktopDisplayUpdater);
139};
140
141}  // namespace
142
143using std::string;
144using std::vector;
145
146DisplayManager::DisplayManager()
147    : delegate_(NULL),
148      screen_ash_(new ScreenAsh),
149      screen_(screen_ash_.get()),
150      layout_store_(new DisplayLayoutStore),
151      first_display_id_(gfx::Display::kInvalidDisplayID),
152      num_connected_displays_(0),
153      force_bounds_changed_(false),
154      change_display_upon_host_resize_(false),
155      second_display_mode_(EXTENDED),
156      mirrored_display_id_(gfx::Display::kInvalidDisplayID) {
157#if defined(OS_CHROMEOS)
158  change_display_upon_host_resize_ = !base::SysInfo::IsRunningOnChromeOS();
159#endif
160  gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_ALTERNATE,
161                                 screen_ash_.get());
162  gfx::Screen* current_native =
163      gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_NATIVE);
164  // If there is no native, or the native was for shutdown,
165  // use ash's screen.
166  if (!current_native ||
167      current_native == screen_for_shutdown) {
168    gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE,
169                                   screen_ash_.get());
170  }
171}
172
173DisplayManager::~DisplayManager() {
174}
175
176// static
177std::vector<float> DisplayManager::GetScalesForDisplay(
178    const DisplayInfo& info) {
179  std::vector<float> ret;
180  if (info.device_scale_factor() == 2.0f) {
181    ret.assign(kUIScalesFor2x, kUIScalesFor2x + arraysize(kUIScalesFor2x));
182    return ret;
183  }
184  switch (info.bounds_in_native().width()) {
185    case 1280:
186      ret.assign(kUIScalesFor1280,
187                 kUIScalesFor1280 + arraysize(kUIScalesFor1280));
188      break;
189    case 1366:
190      ret.assign(kUIScalesFor1366,
191                 kUIScalesFor1366 + arraysize(kUIScalesFor1366));
192      break;
193    default:
194      ret.assign(kUIScalesFor1280,
195                 kUIScalesFor1280 + arraysize(kUIScalesFor1280));
196#if defined(OS_CHROMEOS)
197      if (base::SysInfo::IsRunningOnChromeOS())
198        NOTREACHED() << "Unknown resolution:" << info.ToString();
199#endif
200  }
201  return ret;
202}
203
204// static
205float DisplayManager::GetNextUIScale(const DisplayInfo& info, bool up) {
206  float scale = info.configured_ui_scale();
207  std::vector<float> scales = GetScalesForDisplay(info);
208  for (size_t i = 0; i < scales.size(); ++i) {
209    if (ScaleComparator(scales[i])(scale)) {
210      if (up && i != scales.size() - 1)
211        return scales[i + 1];
212      if (!up && i != 0)
213        return scales[i - 1];
214      return scales[i];
215    }
216  }
217  // Fallback to 1.0f if the |scale| wasn't in the list.
218  return 1.0f;
219}
220
221bool DisplayManager::InitFromCommandLine() {
222  DisplayInfoList info_list;
223  CommandLine* command_line = CommandLine::ForCurrentProcess();
224  if (!command_line->HasSwitch(switches::kAshHostWindowBounds))
225    return false;
226  const string size_str =
227      command_line->GetSwitchValueASCII(switches::kAshHostWindowBounds);
228  vector<string> parts;
229  base::SplitString(size_str, ',', &parts);
230  for (vector<string>::const_iterator iter = parts.begin();
231       iter != parts.end(); ++iter) {
232    info_list.push_back(DisplayInfo::CreateFromSpec(*iter));
233  }
234  MaybeInitInternalDisplay(info_list[0].id());
235  if (info_list.size() > 1 &&
236      command_line->HasSwitch(switches::kAshEnableSoftwareMirroring)) {
237    SetSecondDisplayMode(MIRRORING);
238  }
239  OnNativeDisplaysChanged(info_list);
240  return true;
241}
242
243void DisplayManager::InitDefaultDisplay() {
244  DisplayInfoList info_list;
245  info_list.push_back(DisplayInfo::CreateFromSpec(std::string()));
246  MaybeInitInternalDisplay(info_list[0].id());
247  OnNativeDisplaysChanged(info_list);
248}
249
250// static
251void DisplayManager::UpdateDisplayBoundsForLayoutById(
252    const DisplayLayout& layout,
253    const gfx::Display& primary_display,
254    int64 secondary_display_id) {
255  DCHECK_NE(gfx::Display::kInvalidDisplayID, secondary_display_id);
256  UpdateDisplayBoundsForLayout(
257      layout, primary_display,
258      Shell::GetInstance()->display_manager()->
259      FindDisplayForId(secondary_display_id));
260}
261
262bool DisplayManager::IsActiveDisplay(const gfx::Display& display) const {
263  for (DisplayList::const_iterator iter = displays_.begin();
264       iter != displays_.end(); ++iter) {
265    if ((*iter).id() == display.id())
266      return true;
267  }
268  return false;
269}
270
271bool DisplayManager::HasInternalDisplay() const {
272  return gfx::Display::InternalDisplayId() != gfx::Display::kInvalidDisplayID;
273}
274
275bool DisplayManager::IsInternalDisplayId(int64 id) const {
276  return gfx::Display::InternalDisplayId() == id;
277}
278
279DisplayLayout DisplayManager::GetCurrentDisplayLayout() {
280  DCHECK_EQ(2U, num_connected_displays());
281  // Invert if the primary was swapped.
282  if (num_connected_displays() > 1) {
283    DisplayIdPair pair = GetCurrentDisplayIdPair();
284    return layout_store_->ComputeDisplayLayoutForDisplayIdPair(pair);
285  }
286  NOTREACHED() << "DisplayLayout is requested for single display";
287  // On release build, just fallback to default instead of blowing up.
288  DisplayLayout layout =
289      layout_store_->default_display_layout();
290  layout.primary_id = displays_[0].id();
291  return layout;
292}
293
294DisplayIdPair DisplayManager::GetCurrentDisplayIdPair() const {
295  if (IsMirrored()) {
296    if (software_mirroring_enabled()) {
297      CHECK_EQ(2u, num_connected_displays());
298      // This comment is to make it easy to distinguish the crash
299      // between two checks.
300      CHECK_EQ(1u, displays_.size());
301    }
302    return std::make_pair(displays_[0].id(), mirrored_display_id_);
303  } else {
304    CHECK_GE(2u, displays_.size());
305    int64 id_at_zero = displays_[0].id();
306    if (id_at_zero == gfx::Display::InternalDisplayId() ||
307        id_at_zero == first_display_id()) {
308      return std::make_pair(id_at_zero, displays_[1].id());
309    } else {
310      return std::make_pair(displays_[1].id(), id_at_zero);
311    }
312  }
313}
314
315void DisplayManager::SetLayoutForCurrentDisplays(
316    const DisplayLayout& layout_relative_to_primary) {
317  DCHECK_EQ(2U, GetNumDisplays());
318  if (GetNumDisplays() < 2)
319    return;
320  const gfx::Display& primary = screen_->GetPrimaryDisplay();
321  const DisplayIdPair pair = GetCurrentDisplayIdPair();
322  // Invert if the primary was swapped.
323  DisplayLayout to_set = pair.first == primary.id() ?
324      layout_relative_to_primary : layout_relative_to_primary.Invert();
325
326  DisplayLayout current_layout =
327      layout_store_->GetRegisteredDisplayLayout(pair);
328  if (to_set.position != current_layout.position ||
329      to_set.offset != current_layout.offset) {
330    to_set.primary_id = primary.id();
331    layout_store_->RegisterLayoutForDisplayIdPair(
332        pair.first, pair.second, to_set);
333    if (delegate_)
334      delegate_->PreDisplayConfigurationChange(false);
335    // PreDisplayConfigurationChange(false);
336    // TODO(oshima): Call UpdateDisplays instead.
337    const DisplayLayout layout = GetCurrentDisplayLayout();
338    UpdateDisplayBoundsForLayoutById(
339        layout, primary,
340        ScreenUtil::GetSecondaryDisplay().id());
341
342    // Primary's bounds stay the same. Just notify bounds change
343    // on the secondary.
344    screen_ash_->NotifyBoundsChanged(
345        ScreenUtil::GetSecondaryDisplay());
346    if (delegate_)
347      delegate_->PostDisplayConfigurationChange();
348  }
349}
350
351const gfx::Display& DisplayManager::GetDisplayForId(int64 id) const {
352  gfx::Display* display =
353      const_cast<DisplayManager*>(this)->FindDisplayForId(id);
354  return display ? *display : GetInvalidDisplay();
355}
356
357const gfx::Display& DisplayManager::FindDisplayContainingPoint(
358    const gfx::Point& point_in_screen) const {
359  for (DisplayList::const_iterator iter = displays_.begin();
360       iter != displays_.end(); ++iter) {
361    const gfx::Display& display = *iter;
362    if (display.bounds().Contains(point_in_screen))
363      return display;
364  }
365  return GetInvalidDisplay();
366}
367
368bool DisplayManager::UpdateWorkAreaOfDisplay(int64 display_id,
369                                             const gfx::Insets& insets) {
370  gfx::Display* display = FindDisplayForId(display_id);
371  DCHECK(display);
372  gfx::Rect old_work_area = display->work_area();
373  display->UpdateWorkAreaFromInsets(insets);
374  return old_work_area != display->work_area();
375}
376
377void DisplayManager::SetOverscanInsets(int64 display_id,
378                                       const gfx::Insets& insets_in_dip) {
379  display_info_[display_id].SetOverscanInsets(insets_in_dip);
380  DisplayInfoList display_info_list;
381  for (DisplayList::const_iterator iter = displays_.begin();
382       iter != displays_.end(); ++iter) {
383    display_info_list.push_back(GetDisplayInfo(iter->id()));
384  }
385  AddMirrorDisplayInfoIfAny(&display_info_list);
386  UpdateDisplays(display_info_list);
387}
388
389void DisplayManager::SetDisplayRotation(int64 display_id,
390                                        gfx::Display::Rotation rotation) {
391  DisplayInfoList display_info_list;
392  for (DisplayList::const_iterator iter = displays_.begin();
393       iter != displays_.end(); ++iter) {
394    DisplayInfo info = GetDisplayInfo(iter->id());
395    if (info.id() == display_id) {
396      if (info.rotation() == rotation)
397        return;
398      info.set_rotation(rotation);
399    }
400    display_info_list.push_back(info);
401  }
402  AddMirrorDisplayInfoIfAny(&display_info_list);
403  if (virtual_keyboard_root_window_enabled() &&
404      display_id == non_desktop_display_.id()) {
405    DisplayInfo info = GetDisplayInfo(display_id);
406    info.set_rotation(rotation);
407    display_info_list.push_back(info);
408  }
409  UpdateDisplays(display_info_list);
410}
411
412void DisplayManager::SetDisplayUIScale(int64 display_id,
413                                       float ui_scale) {
414  if (!IsDisplayUIScalingEnabled() ||
415      gfx::Display::InternalDisplayId() != display_id) {
416    return;
417  }
418
419  DisplayInfoList display_info_list;
420  for (DisplayList::const_iterator iter = displays_.begin();
421       iter != displays_.end(); ++iter) {
422    DisplayInfo info = GetDisplayInfo(iter->id());
423    if (info.id() == display_id) {
424      if (info.configured_ui_scale() == ui_scale)
425        return;
426      std::vector<float> scales = GetScalesForDisplay(info);
427      ScaleComparator comparator(ui_scale);
428      if (std::find_if(scales.begin(), scales.end(), comparator) ==
429          scales.end()) {
430        return;
431      }
432      info.set_configured_ui_scale(ui_scale);
433    }
434    display_info_list.push_back(info);
435  }
436  AddMirrorDisplayInfoIfAny(&display_info_list);
437  UpdateDisplays(display_info_list);
438}
439
440void DisplayManager::SetDisplayResolution(int64 display_id,
441                                          const gfx::Size& resolution) {
442  DCHECK_NE(gfx::Display::InternalDisplayId(), display_id);
443  if (gfx::Display::InternalDisplayId() == display_id)
444    return;
445  const DisplayInfo& display_info = GetDisplayInfo(display_id);
446  const std::vector<DisplayMode>& modes = display_info.display_modes();
447  DCHECK_NE(0u, modes.size());
448  std::vector<DisplayMode>::const_iterator iter =
449      std::find_if(modes.begin(), modes.end(), DisplayModeMatcher(resolution));
450  if (iter == modes.end()) {
451    LOG(WARNING) << "Unsupported resolution was requested:"
452                 << resolution.ToString();
453    return;
454  }
455  display_modes_[display_id] = *iter;
456#if defined(OS_CHROMEOS)
457  if (base::SysInfo::IsRunningOnChromeOS())
458    Shell::GetInstance()->display_configurator()->OnConfigurationChanged();
459#endif
460}
461
462void DisplayManager::RegisterDisplayProperty(
463    int64 display_id,
464    gfx::Display::Rotation rotation,
465    float ui_scale,
466    const gfx::Insets* overscan_insets,
467    const gfx::Size& resolution_in_pixels,
468    ui::ColorCalibrationProfile color_profile) {
469  if (display_info_.find(display_id) == display_info_.end())
470    display_info_[display_id] = DisplayInfo(display_id, std::string(), false);
471
472  display_info_[display_id].set_rotation(rotation);
473  display_info_[display_id].SetColorProfile(color_profile);
474  // Just in case the preference file was corrupted.
475  if (0.5f <= ui_scale && ui_scale <= 2.0f)
476    display_info_[display_id].set_configured_ui_scale(ui_scale);
477  if (overscan_insets)
478    display_info_[display_id].SetOverscanInsets(*overscan_insets);
479  if (!resolution_in_pixels.IsEmpty()) {
480    // Default refresh rate, until OnNativeDisplaysChanged() updates us with the
481    // actual display info, is 60 Hz.
482    display_modes_[display_id] =
483        DisplayMode(resolution_in_pixels, 60.0f, false, false);
484  }
485}
486
487bool DisplayManager::GetSelectedModeForDisplayId(int64 id,
488                                                 DisplayMode* mode_out) const {
489  std::map<int64, DisplayMode>::const_iterator iter = display_modes_.find(id);
490  if (iter == display_modes_.end())
491    return false;
492  *mode_out = iter->second;
493  return true;
494}
495
496bool DisplayManager::IsDisplayUIScalingEnabled() const {
497  return GetDisplayIdForUIScaling() != gfx::Display::kInvalidDisplayID;
498}
499
500gfx::Insets DisplayManager::GetOverscanInsets(int64 display_id) const {
501  std::map<int64, DisplayInfo>::const_iterator it =
502      display_info_.find(display_id);
503  return (it != display_info_.end()) ?
504      it->second.overscan_insets_in_dip() : gfx::Insets();
505}
506
507void DisplayManager::SetColorCalibrationProfile(
508    int64 display_id,
509    ui::ColorCalibrationProfile profile) {
510#if defined(OS_CHROMEOS)
511  if (!display_info_[display_id].IsColorProfileAvailable(profile))
512    return;
513
514  if (delegate_)
515    delegate_->PreDisplayConfigurationChange(false);
516  // Just sets color profile if it's not running on ChromeOS (like tests).
517  if (!base::SysInfo::IsRunningOnChromeOS() ||
518      Shell::GetInstance()->display_configurator()->SetColorCalibrationProfile(
519          display_id, profile)) {
520    display_info_[display_id].SetColorProfile(profile);
521    UMA_HISTOGRAM_ENUMERATION(
522        "ChromeOS.Display.ColorProfile", profile, ui::NUM_COLOR_PROFILES);
523  }
524  if (delegate_)
525    delegate_->PostDisplayConfigurationChange();
526#endif
527}
528
529void DisplayManager::OnNativeDisplaysChanged(
530    const std::vector<DisplayInfo>& updated_displays) {
531  if (updated_displays.empty()) {
532    VLOG(1) << "OnNativeDisplayChanged(0): # of current displays="
533            << displays_.size();
534    // If the device is booted without display, or chrome is started
535    // without --ash-host-window-bounds on linux desktop, use the
536    // default display.
537    if (displays_.empty()) {
538      std::vector<DisplayInfo> init_displays;
539      init_displays.push_back(DisplayInfo::CreateFromSpec(std::string()));
540      MaybeInitInternalDisplay(init_displays[0].id());
541      OnNativeDisplaysChanged(init_displays);
542    } else {
543      // Otherwise don't update the displays when all displays are disconnected.
544      // This happens when:
545      // - the device is idle and powerd requested to turn off all displays.
546      // - the device is suspended. (kernel turns off all displays)
547      // - the internal display's brightness is set to 0 and no external
548      //   display is connected.
549      // - the internal display's brightness is 0 and external display is
550      //   disconnected.
551      // The display will be updated when one of displays is turned on, and the
552      // display list will be updated correctly.
553    }
554    return;
555  }
556  first_display_id_ = updated_displays[0].id();
557  std::set<gfx::Point> origins;
558
559  if (updated_displays.size() == 1) {
560    VLOG(1) << "OnNativeDisplaysChanged(1):" << updated_displays[0].ToString();
561  } else {
562    VLOG(1) << "OnNativeDisplaysChanged(" << updated_displays.size()
563            << ") [0]=" << updated_displays[0].ToString()
564            << ", [1]=" << updated_displays[1].ToString();
565  }
566
567  bool internal_display_connected = false;
568  num_connected_displays_ = updated_displays.size();
569  mirrored_display_id_ = gfx::Display::kInvalidDisplayID;
570  non_desktop_display_ = gfx::Display();
571  DisplayInfoList new_display_info_list;
572  for (DisplayInfoList::const_iterator iter = updated_displays.begin();
573       iter != updated_displays.end();
574       ++iter) {
575    if (!internal_display_connected)
576      internal_display_connected = IsInternalDisplayId(iter->id());
577    // Mirrored monitors have the same origins.
578    gfx::Point origin = iter->bounds_in_native().origin();
579    if (origins.find(origin) != origins.end()) {
580      InsertAndUpdateDisplayInfo(*iter);
581      mirrored_display_id_ = iter->id();
582    } else {
583      origins.insert(origin);
584      new_display_info_list.push_back(*iter);
585    }
586
587    const gfx::Size& resolution = iter->bounds_in_native().size();
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    std::vector<DisplayMode>::const_iterator display_modes_iter =
593        std::find_if(display_modes.begin(),
594                     display_modes.end(),
595                     DisplayModeMatcher(resolution));
596    // Update the actual resolution selected as the resolution request may fail.
597    if (display_modes_iter == display_modes.end())
598      display_modes_.erase(iter->id());
599    else if (display_modes_.find(iter->id()) != display_modes_.end())
600      display_modes_[iter->id()] = *display_modes_iter;
601  }
602  if (HasInternalDisplay() &&
603      !internal_display_connected &&
604      display_info_.find(gfx::Display::InternalDisplayId()) ==
605      display_info_.end()) {
606    DisplayInfo internal_display_info(
607        gfx::Display::InternalDisplayId(),
608        l10n_util::GetStringUTF8(IDS_ASH_INTERNAL_DISPLAY_NAME),
609        false  /*Internal display must not have overscan */);
610    internal_display_info.SetBounds(gfx::Rect(0, 0, 800, 600));
611    display_info_[gfx::Display::InternalDisplayId()] = internal_display_info;
612  }
613  UpdateDisplays(new_display_info_list);
614}
615
616void DisplayManager::UpdateDisplays() {
617  DisplayInfoList display_info_list;
618  for (DisplayList::const_iterator iter = displays_.begin();
619       iter != displays_.end(); ++iter) {
620    display_info_list.push_back(GetDisplayInfo(iter->id()));
621  }
622  AddMirrorDisplayInfoIfAny(&display_info_list);
623  UpdateDisplays(display_info_list);
624}
625
626void DisplayManager::UpdateDisplays(
627    const std::vector<DisplayInfo>& updated_display_info_list) {
628#if defined(OS_WIN)
629  if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
630    DCHECK_EQ(1u, updated_display_info_list.size()) <<
631        "Multiple display test does not work on Win8 bots. Please "
632        "skip (don't disable) the test using SupportsMultipleDisplays()";
633  }
634#endif
635
636  DisplayInfoList new_display_info_list = updated_display_info_list;
637  std::sort(displays_.begin(), displays_.end(), DisplaySortFunctor());
638  std::sort(new_display_info_list.begin(),
639            new_display_info_list.end(),
640            DisplayInfoSortFunctor());
641  DisplayList removed_displays;
642  std::vector<size_t> changed_display_indices;
643  std::vector<size_t> added_display_indices;
644
645  DisplayList::iterator curr_iter = displays_.begin();
646  DisplayInfoList::const_iterator new_info_iter = new_display_info_list.begin();
647
648  DisplayList new_displays;
649
650  // Use the internal display or 1st as the mirror source, then scale
651  // the root window so that it matches the external display's
652  // resolution. This is necessary in order for scaling to work while
653  // mirrored.
654  int64 non_desktop_display_id = gfx::Display::kInvalidDisplayID;
655
656  if (second_display_mode_ != EXTENDED && new_display_info_list.size() == 2) {
657    bool zero_is_source =
658        first_display_id_ == new_display_info_list[0].id() ||
659        gfx::Display::InternalDisplayId() == new_display_info_list[0].id();
660    if (second_display_mode_ == MIRRORING) {
661      mirrored_display_id_ = new_display_info_list[zero_is_source ? 1 : 0].id();
662      non_desktop_display_id = mirrored_display_id_;
663    } else {
664      // TODO(oshima|bshe): The virtual keyboard is currently assigned to
665      // the 1st display.
666      non_desktop_display_id =
667          new_display_info_list[zero_is_source ? 0 : 1].id();
668    }
669  }
670
671  while (curr_iter != displays_.end() ||
672         new_info_iter != new_display_info_list.end()) {
673    if (new_info_iter != new_display_info_list.end() &&
674        non_desktop_display_id == new_info_iter->id()) {
675      DisplayInfo info = *new_info_iter;
676      info.SetOverscanInsets(gfx::Insets());
677      InsertAndUpdateDisplayInfo(info);
678      non_desktop_display_ =
679          CreateDisplayFromDisplayInfoById(non_desktop_display_id);
680      ++new_info_iter;
681      // Remove existing external display if it is going to be used as
682      // non desktop.
683      if (curr_iter != displays_.end() &&
684          curr_iter->id() == non_desktop_display_id) {
685        removed_displays.push_back(*curr_iter);
686        ++curr_iter;
687      }
688      continue;
689    }
690
691    if (curr_iter == displays_.end()) {
692      // more displays in new list.
693      added_display_indices.push_back(new_displays.size());
694      InsertAndUpdateDisplayInfo(*new_info_iter);
695      new_displays.push_back(
696          CreateDisplayFromDisplayInfoById(new_info_iter->id()));
697      ++new_info_iter;
698    } else if (new_info_iter == new_display_info_list.end()) {
699      // more displays in current list.
700      removed_displays.push_back(*curr_iter);
701      ++curr_iter;
702    } else if (curr_iter->id() == new_info_iter->id()) {
703      const gfx::Display& current_display = *curr_iter;
704      // Copy the info because |CreateDisplayFromInfo| updates the instance.
705      const DisplayInfo current_display_info =
706          GetDisplayInfo(current_display.id());
707      InsertAndUpdateDisplayInfo(*new_info_iter);
708      gfx::Display new_display =
709          CreateDisplayFromDisplayInfoById(new_info_iter->id());
710      const DisplayInfo& new_display_info = GetDisplayInfo(new_display.id());
711
712      bool host_window_bounds_changed =
713          current_display_info.bounds_in_native() !=
714          new_display_info.bounds_in_native();
715
716      if (force_bounds_changed_ ||
717          host_window_bounds_changed ||
718          (current_display.device_scale_factor() !=
719           new_display.device_scale_factor()) ||
720          (current_display_info.size_in_pixel() !=
721           new_display.GetSizeInPixel()) ||
722          (current_display.rotation() != new_display.rotation())) {
723        changed_display_indices.push_back(new_displays.size());
724      }
725
726      new_display.UpdateWorkAreaFromInsets(current_display.GetWorkAreaInsets());
727      new_displays.push_back(new_display);
728      ++curr_iter;
729      ++new_info_iter;
730    } else if (curr_iter->id() < new_info_iter->id()) {
731      // more displays in current list between ids, which means it is deleted.
732      removed_displays.push_back(*curr_iter);
733      ++curr_iter;
734    } else {
735      // more displays in new list between ids, which means it is added.
736      added_display_indices.push_back(new_displays.size());
737      InsertAndUpdateDisplayInfo(*new_info_iter);
738      new_displays.push_back(
739          CreateDisplayFromDisplayInfoById(new_info_iter->id()));
740      ++new_info_iter;
741    }
742  }
743
744  scoped_ptr<NonDesktopDisplayUpdater> non_desktop_display_updater(
745      new NonDesktopDisplayUpdater(this, delegate_));
746
747  // Do not update |displays_| if there's nothing to be updated. Without this,
748  // it will not update the display layout, which causes the bug
749  // http://crbug.com/155948.
750  if (changed_display_indices.empty() && added_display_indices.empty() &&
751      removed_displays.empty()) {
752    return;
753  }
754  // Clear focus if the display has been removed, but don't clear focus if
755  // the destkop has been moved from one display to another
756  // (mirror -> docked, docked -> single internal).
757  bool clear_focus =
758      !removed_displays.empty() &&
759      !(removed_displays.size() == 1 && added_display_indices.size() == 1);
760  if (delegate_)
761    delegate_->PreDisplayConfigurationChange(clear_focus);
762
763  size_t updated_index;
764  if (UpdateSecondaryDisplayBoundsForLayout(&new_displays, &updated_index) &&
765      std::find(added_display_indices.begin(),
766                added_display_indices.end(),
767                updated_index) == added_display_indices.end() &&
768      std::find(changed_display_indices.begin(),
769                changed_display_indices.end(),
770                updated_index) == changed_display_indices.end()) {
771    changed_display_indices.push_back(updated_index);
772  }
773
774  displays_ = new_displays;
775
776  base::AutoReset<bool> resetter(&change_display_upon_host_resize_, false);
777
778  // Temporarily add displays to be removed because display object
779  // being removed are accessed during shutting down the root.
780  displays_.insert(displays_.end(), removed_displays.begin(),
781                   removed_displays.end());
782
783  for (DisplayList::const_reverse_iterator iter = removed_displays.rbegin();
784       iter != removed_displays.rend(); ++iter) {
785    screen_ash_->NotifyDisplayRemoved(displays_.back());
786    displays_.pop_back();
787  }
788  // Close the non desktop window here to avoid creating two compositor on
789  // one display.
790  if (!non_desktop_display_updater->enabled())
791    non_desktop_display_updater.reset();
792  for (std::vector<size_t>::iterator iter = added_display_indices.begin();
793       iter != added_display_indices.end(); ++iter) {
794    screen_ash_->NotifyDisplayAdded(displays_[*iter]);
795  }
796  // Create the non destkop window after all displays are added so that
797  // it can mirror the display newly added. This can happen when switching
798  // from dock mode to software mirror mode.
799  non_desktop_display_updater.reset();
800  for (std::vector<size_t>::iterator iter = changed_display_indices.begin();
801       iter != changed_display_indices.end(); ++iter) {
802    screen_ash_->NotifyBoundsChanged(displays_[*iter]);
803  }
804  if (delegate_)
805    delegate_->PostDisplayConfigurationChange();
806
807#if defined(USE_X11) && defined(OS_CHROMEOS)
808  if (!changed_display_indices.empty() && base::SysInfo::IsRunningOnChromeOS())
809    ui::ClearX11DefaultRootWindow();
810#endif
811}
812
813const gfx::Display& DisplayManager::GetDisplayAt(size_t index) const {
814  DCHECK_LT(index, displays_.size());
815  return displays_[index];
816}
817
818const gfx::Display& DisplayManager::GetPrimaryDisplayCandidate() const {
819  if (GetNumDisplays() == 1)
820    return displays_[0];
821  DisplayLayout layout = layout_store_->GetRegisteredDisplayLayout(
822      GetCurrentDisplayIdPair());
823  return GetDisplayForId(layout.primary_id);
824}
825
826size_t DisplayManager::GetNumDisplays() const {
827  return displays_.size();
828}
829
830bool DisplayManager::IsMirrored() const {
831  return mirrored_display_id_ != gfx::Display::kInvalidDisplayID;
832}
833
834const DisplayInfo& DisplayManager::GetDisplayInfo(int64 display_id) const {
835  std::map<int64, DisplayInfo>::const_iterator iter =
836      display_info_.find(display_id);
837  CHECK(iter != display_info_.end()) << display_id;
838  return iter->second;
839}
840
841std::string DisplayManager::GetDisplayNameForId(int64 id) {
842  if (id == gfx::Display::kInvalidDisplayID)
843    return l10n_util::GetStringUTF8(IDS_ASH_STATUS_TRAY_UNKNOWN_DISPLAY_NAME);
844
845  std::map<int64, DisplayInfo>::const_iterator iter = display_info_.find(id);
846  if (iter != display_info_.end() && !iter->second.name().empty())
847    return iter->second.name();
848
849  return base::StringPrintf("Display %d", static_cast<int>(id));
850}
851
852int64 DisplayManager::GetDisplayIdForUIScaling() const {
853  // UI Scaling is effective only on internal display.
854  int64 display_id = gfx::Display::InternalDisplayId();
855#if defined(OS_WIN)
856  display_id = first_display_id();
857#endif
858  return display_id;
859}
860
861void DisplayManager::SetMirrorMode(bool mirrored) {
862  if (num_connected_displays() <= 1)
863    return;
864
865#if defined(OS_CHROMEOS)
866  if (base::SysInfo::IsRunningOnChromeOS()) {
867    ui::MultipleDisplayState new_state =
868        mirrored ? ui::MULTIPLE_DISPLAY_STATE_DUAL_MIRROR :
869                   ui::MULTIPLE_DISPLAY_STATE_DUAL_EXTENDED;
870    Shell::GetInstance()->display_configurator()->SetDisplayMode(new_state);
871    return;
872  }
873#endif
874  // This is fallback path to emulate mirroroing on desktop.
875  SetSecondDisplayMode(mirrored ? MIRRORING : EXTENDED);
876  DisplayInfoList display_info_list;
877  int count = 0;
878  for (std::map<int64, DisplayInfo>::const_iterator iter =
879           display_info_.begin();
880       count < 2; ++iter, ++count) {
881    display_info_list.push_back(GetDisplayInfo(iter->second.id()));
882  }
883  UpdateDisplays(display_info_list);
884#if defined(OS_CHROMEOS)
885  if (Shell::GetInstance()->output_configurator_animation()) {
886    Shell::GetInstance()->output_configurator_animation()->
887        StartFadeInAnimation();
888  }
889#endif
890}
891
892void DisplayManager::AddRemoveDisplay() {
893  DCHECK(!displays_.empty());
894  std::vector<DisplayInfo> new_display_info_list;
895  const DisplayInfo& first_display = GetDisplayInfo(displays_[0].id());
896  new_display_info_list.push_back(first_display);
897  // Add if there is only one display connected.
898  if (num_connected_displays() == 1) {
899    // Layout the 2nd display below the primary as with the real device.
900    gfx::Rect host_bounds = first_display.bounds_in_native();
901    new_display_info_list.push_back(DisplayInfo::CreateFromSpec(
902        base::StringPrintf(
903            "%d+%d-500x400", host_bounds.x(), host_bounds.bottom())));
904  }
905  num_connected_displays_ = new_display_info_list.size();
906  mirrored_display_id_ = gfx::Display::kInvalidDisplayID;
907  non_desktop_display_ = gfx::Display();
908  UpdateDisplays(new_display_info_list);
909}
910
911void DisplayManager::ToggleDisplayScaleFactor() {
912  DCHECK(!displays_.empty());
913  std::vector<DisplayInfo> new_display_info_list;
914  for (DisplayList::const_iterator iter = displays_.begin();
915       iter != displays_.end(); ++iter) {
916    DisplayInfo display_info = GetDisplayInfo(iter->id());
917    display_info.set_device_scale_factor(
918        display_info.device_scale_factor() == 1.0f ? 2.0f : 1.0f);
919    new_display_info_list.push_back(display_info);
920  }
921  AddMirrorDisplayInfoIfAny(&new_display_info_list);
922  UpdateDisplays(new_display_info_list);
923}
924
925#if defined(OS_CHROMEOS)
926void DisplayManager::SetSoftwareMirroring(bool enabled) {
927  // TODO(oshima|bshe): Support external display on the system
928  // that has virtual keyboard display.
929  if (second_display_mode_ == VIRTUAL_KEYBOARD)
930    return;
931  SetSecondDisplayMode(enabled ? MIRRORING : EXTENDED);
932}
933#endif
934
935void DisplayManager::SetSecondDisplayMode(SecondDisplayMode mode) {
936  second_display_mode_ = mode;
937  mirrored_display_id_ = gfx::Display::kInvalidDisplayID;
938  non_desktop_display_ = gfx::Display();
939}
940
941bool DisplayManager::UpdateDisplayBounds(int64 display_id,
942                                         const gfx::Rect& new_bounds) {
943  if (change_display_upon_host_resize_) {
944    display_info_[display_id].SetBounds(new_bounds);
945    // Don't notify observers if the mirrored window has changed.
946    if (software_mirroring_enabled() && mirrored_display_id_ == display_id)
947      return false;
948    gfx::Display* display = FindDisplayForId(display_id);
949    display->SetSize(display_info_[display_id].size_in_pixel());
950    screen_ash_->NotifyBoundsChanged(*display);
951    return true;
952  }
953  return false;
954}
955
956void DisplayManager::CreateMirrorWindowIfAny() {
957  NonDesktopDisplayUpdater updater(this, delegate_);
958}
959
960void DisplayManager::CreateScreenForShutdown() const {
961  bool native_is_ash =
962      gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_NATIVE) ==
963      screen_ash_.get();
964  delete screen_for_shutdown;
965  screen_for_shutdown = screen_ash_->CloneForShutdown();
966  gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_ALTERNATE,
967                                 screen_for_shutdown);
968  if (native_is_ash) {
969    gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE,
970                                   screen_for_shutdown);
971  }
972}
973
974gfx::Display* DisplayManager::FindDisplayForId(int64 id) {
975  for (DisplayList::iterator iter = displays_.begin();
976       iter != displays_.end(); ++iter) {
977    if ((*iter).id() == id)
978      return &(*iter);
979  }
980  DLOG(WARNING) << "Could not find display:" << id;
981  return NULL;
982}
983
984void DisplayManager::AddMirrorDisplayInfoIfAny(
985    std::vector<DisplayInfo>* display_info_list) {
986  if (software_mirroring_enabled() && IsMirrored())
987    display_info_list->push_back(GetDisplayInfo(mirrored_display_id_));
988}
989
990void DisplayManager::InsertAndUpdateDisplayInfo(const DisplayInfo& new_info) {
991  std::map<int64, DisplayInfo>::iterator info =
992      display_info_.find(new_info.id());
993  if (info != display_info_.end()) {
994    info->second.Copy(new_info);
995  } else {
996    display_info_[new_info.id()] = new_info;
997    display_info_[new_info.id()].set_native(false);
998  }
999  display_info_[new_info.id()].UpdateDisplaySize();
1000
1001  OnDisplayInfoUpdated(display_info_[new_info.id()]);
1002}
1003
1004void DisplayManager::OnDisplayInfoUpdated(const DisplayInfo& display_info) {
1005#if defined(OS_CHROMEOS)
1006  ui::ColorCalibrationProfile color_profile = display_info.color_profile();
1007  if (color_profile != ui::COLOR_PROFILE_STANDARD) {
1008    Shell::GetInstance()->display_configurator()->SetColorCalibrationProfile(
1009        display_info.id(), color_profile);
1010  }
1011#endif
1012}
1013
1014gfx::Display DisplayManager::CreateDisplayFromDisplayInfoById(int64 id) {
1015  DCHECK(display_info_.find(id) != display_info_.end());
1016  const DisplayInfo& display_info = display_info_[id];
1017
1018  gfx::Display new_display(display_info.id());
1019  gfx::Rect bounds_in_native(display_info.size_in_pixel());
1020  float device_scale_factor = display_info.device_scale_factor();
1021  if (device_scale_factor == 2.0f && display_info.configured_ui_scale() == 2.0f)
1022    device_scale_factor = 1.0f;
1023
1024  // Simply set the origin to (0,0).  The primary display's origin is
1025  // always (0,0) and the secondary display's bounds will be updated
1026  // in |UpdateSecondaryDisplayBoundsForLayout| called in |UpdateDisplay|.
1027  new_display.SetScaleAndBounds(
1028      device_scale_factor, gfx::Rect(bounds_in_native.size()));
1029  new_display.set_rotation(display_info.rotation());
1030  new_display.set_touch_support(display_info.touch_support());
1031  return new_display;
1032}
1033
1034bool DisplayManager::UpdateSecondaryDisplayBoundsForLayout(
1035    DisplayList* displays,
1036    size_t* updated_index) const {
1037  if (displays->size() != 2U)
1038    return false;
1039
1040  int64 id_at_zero = displays->at(0).id();
1041  DisplayIdPair pair =
1042      (id_at_zero == first_display_id_ ||
1043       id_at_zero == gfx::Display::InternalDisplayId()) ?
1044      std::make_pair(id_at_zero, displays->at(1).id()) :
1045      std::make_pair(displays->at(1).id(), id_at_zero);
1046  DisplayLayout layout =
1047      layout_store_->ComputeDisplayLayoutForDisplayIdPair(pair);
1048
1049  // Ignore if a user has a old format (should be extremely rare)
1050  // and this will be replaced with DCHECK.
1051  if (layout.primary_id != gfx::Display::kInvalidDisplayID) {
1052    size_t primary_index, secondary_index;
1053    if (displays->at(0).id() == layout.primary_id) {
1054      primary_index = 0;
1055      secondary_index = 1;
1056    } else {
1057      primary_index = 1;
1058      secondary_index = 0;
1059    }
1060    // This function may be called before the secondary display is
1061    // registered. The bounds is empty in that case and will
1062    // return true.
1063    gfx::Rect bounds =
1064        GetDisplayForId(displays->at(secondary_index).id()).bounds();
1065    UpdateDisplayBoundsForLayout(
1066        layout, displays->at(primary_index), &displays->at(secondary_index));
1067    *updated_index = secondary_index;
1068    return bounds != displays->at(secondary_index).bounds();
1069  }
1070  return false;
1071}
1072
1073// static
1074void DisplayManager::UpdateDisplayBoundsForLayout(
1075    const DisplayLayout& layout,
1076    const gfx::Display& primary_display,
1077    gfx::Display* secondary_display) {
1078  DCHECK_EQ("0,0", primary_display.bounds().origin().ToString());
1079
1080  const gfx::Rect& primary_bounds = primary_display.bounds();
1081  const gfx::Rect& secondary_bounds = secondary_display->bounds();
1082  gfx::Point new_secondary_origin = primary_bounds.origin();
1083
1084  DisplayLayout::Position position = layout.position;
1085
1086  // Ignore the offset in case the secondary display doesn't share edges with
1087  // the primary display.
1088  int offset = layout.offset;
1089  if (position == DisplayLayout::TOP || position == DisplayLayout::BOTTOM) {
1090    offset = std::min(
1091        offset, primary_bounds.width() - kMinimumOverlapForInvalidOffset);
1092    offset = std::max(
1093        offset, -secondary_bounds.width() + kMinimumOverlapForInvalidOffset);
1094  } else {
1095    offset = std::min(
1096        offset, primary_bounds.height() - kMinimumOverlapForInvalidOffset);
1097    offset = std::max(
1098        offset, -secondary_bounds.height() + kMinimumOverlapForInvalidOffset);
1099  }
1100  switch (position) {
1101    case DisplayLayout::TOP:
1102      new_secondary_origin.Offset(offset, -secondary_bounds.height());
1103      break;
1104    case DisplayLayout::RIGHT:
1105      new_secondary_origin.Offset(primary_bounds.width(), offset);
1106      break;
1107    case DisplayLayout::BOTTOM:
1108      new_secondary_origin.Offset(offset, primary_bounds.height());
1109      break;
1110    case DisplayLayout::LEFT:
1111      new_secondary_origin.Offset(-secondary_bounds.width(), offset);
1112      break;
1113  }
1114  gfx::Insets insets = secondary_display->GetWorkAreaInsets();
1115  secondary_display->set_bounds(
1116      gfx::Rect(new_secondary_origin, secondary_bounds.size()));
1117  secondary_display->UpdateWorkAreaFromInsets(insets);
1118}
1119
1120}  // namespace ash
1121