display_manager.cc revision effb81e5f8246d0db0270817048dc992db66e9fb 
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 {
46namespace internal {
47typedef std::vector<gfx::Display> DisplayList;
48typedef std::vector<DisplayInfo> DisplayInfoList;
49
50namespace {
51
52// We need to keep this in order for unittests to tell if
53// the object in gfx::Screen::GetScreenByType is for shutdown.
54gfx::Screen* screen_for_shutdown = NULL;
55
56// The number of pixels to overlap between the primary and secondary displays,
57// in case that the offset value is too large.
58const int kMinimumOverlapForInvalidOffset = 100;
59
60// List of value UI Scale values. Scales for 2x are equivalent to 640,
61// 800, 1024, 1280, 1440, 1600 and 1920 pixel width respectively on
62// 2560 pixel width 2x density display. Please see crbug.com/233375
63// for the full list of resolutions.
64const float kUIScalesFor2x[] =
65    {0.5f, 0.625f, 0.8f, 1.0f, 1.125f, 1.25f, 1.5f, 2.0f};
66const float kUIScalesFor1280[] = {0.5f, 0.625f, 0.8f, 1.0f, 1.125f };
67const float kUIScalesFor1366[] = {0.5f, 0.6f, 0.75f, 1.0f, 1.125f };
68
69struct DisplaySortFunctor {
70  bool operator()(const gfx::Display& a, const gfx::Display& b) {
71    return a.id() < b.id();
72  }
73};
74
75struct DisplayInfoSortFunctor {
76  bool operator()(const DisplayInfo& a, const DisplayInfo& b) {
77    return a.id() < b.id();
78  }
79};
80
81struct DisplayModeMatcher {
82  DisplayModeMatcher(const gfx::Size& size) : size(size) {}
83  bool operator()(const DisplayMode& mode) { return mode.size == size; }
84  gfx::Size size;
85};
86
87struct ScaleComparator {
88  explicit ScaleComparator(float s) : scale(s) {}
89
90  bool operator()(float s) const {
91    const float kEpsilon = 0.0001f;
92    return std::abs(scale - s) < kEpsilon;
93  }
94  float scale;
95};
96
97gfx::Display& GetInvalidDisplay() {
98  static gfx::Display* invalid_display = new gfx::Display();
99  return *invalid_display;
100}
101
102void MaybeInitInternalDisplay(int64 id) {
103  CommandLine* command_line = CommandLine::ForCurrentProcess();
104  if (command_line->HasSwitch(switches::kAshUseFirstDisplayAsInternal))
105    gfx::Display::SetInternalDisplayId(id);
106}
107
108// Scoped objects used to either create or close the non desktop window
109// at specific timing.
110class NonDesktopDisplayUpdater {
111 public:
112  NonDesktopDisplayUpdater(DisplayManager* manager,
113                           DisplayManager::Delegate* delegate)
114      : manager_(manager),
115        delegate_(delegate),
116        enabled_(manager_->second_display_mode() != DisplayManager::EXTENDED &&
117                 manager_->non_desktop_display().is_valid()) {
118  }
119
120  ~NonDesktopDisplayUpdater() {
121    if (!delegate_)
122      return;
123
124    if (enabled_) {
125      DisplayInfo display_info = manager_->GetDisplayInfo(
126          manager_->non_desktop_display().id());
127      delegate_->CreateOrUpdateNonDesktopDisplay(display_info);
128    } else {
129      delegate_->CloseNonDesktopDisplay();
130    }
131  }
132
133  bool enabled() const { return enabled_; }
134
135 private:
136  DisplayManager* manager_;
137  DisplayManager::Delegate* delegate_;
138  bool enabled_;
139  DISALLOW_COPY_AND_ASSIGN(NonDesktopDisplayUpdater);
140};
141
142}  // namespace
143
144using std::string;
145using std::vector;
146
147DisplayManager::DisplayManager()
148    : delegate_(NULL),
149      screen_ash_(new ScreenAsh),
150      screen_(screen_ash_.get()),
151      layout_store_(new DisplayLayoutStore),
152      first_display_id_(gfx::Display::kInvalidDisplayID),
153      num_connected_displays_(0),
154      force_bounds_changed_(false),
155      change_display_upon_host_resize_(false),
156      second_display_mode_(EXTENDED),
157      mirrored_display_id_(gfx::Display::kInvalidDisplayID) {
158#if defined(OS_CHROMEOS)
159  change_display_upon_host_resize_ = !base::SysInfo::IsRunningOnChromeOS();
160#endif
161  gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_ALTERNATE,
162                                 screen_ash_.get());
163  gfx::Screen* current_native =
164      gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_NATIVE);
165  // If there is no native, or the native was for shutdown,
166  // use ash's screen.
167  if (!current_native ||
168      current_native == screen_for_shutdown) {
169    gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE,
170                                   screen_ash_.get());
171  }
172}
173
174DisplayManager::~DisplayManager() {
175}
176
177// static
178std::vector<float> DisplayManager::GetScalesForDisplay(
179    const DisplayInfo& info) {
180  std::vector<float> ret;
181  if (info.device_scale_factor() == 2.0f) {
182    ret.assign(kUIScalesFor2x, kUIScalesFor2x + arraysize(kUIScalesFor2x));
183    return ret;
184  }
185  switch (info.bounds_in_native().width()) {
186    case 1280:
187      ret.assign(kUIScalesFor1280,
188                 kUIScalesFor1280 + arraysize(kUIScalesFor1280));
189      break;
190    case 1366:
191      ret.assign(kUIScalesFor1366,
192                 kUIScalesFor1366 + arraysize(kUIScalesFor1366));
193      break;
194    default:
195      ret.assign(kUIScalesFor1280,
196                 kUIScalesFor1280 + arraysize(kUIScalesFor1280));
197#if defined(OS_CHROMEOS)
198      if (base::SysInfo::IsRunningOnChromeOS())
199        NOTREACHED() << "Unknown resolution:" << info.ToString();
200#endif
201  }
202  return ret;
203}
204
205// static
206float DisplayManager::GetNextUIScale(const DisplayInfo& info, bool up) {
207  float scale = info.configured_ui_scale();
208  std::vector<float> scales = GetScalesForDisplay(info);
209  for (size_t i = 0; i < scales.size(); ++i) {
210    if (ScaleComparator(scales[i])(scale)) {
211      if (up && i != scales.size() - 1)
212        return scales[i + 1];
213      if (!up && i != 0)
214        return scales[i - 1];
215      return scales[i];
216    }
217  }
218  // Fallback to 1.0f if the |scale| wasn't in the list.
219  return 1.0f;
220}
221
222bool DisplayManager::InitFromCommandLine() {
223  DisplayInfoList info_list;
224  CommandLine* command_line = CommandLine::ForCurrentProcess();
225  if (!command_line->HasSwitch(switches::kAshHostWindowBounds))
226    return false;
227  const string size_str =
228      command_line->GetSwitchValueASCII(switches::kAshHostWindowBounds);
229  vector<string> parts;
230  base::SplitString(size_str, ',', &parts);
231  for (vector<string>::const_iterator iter = parts.begin();
232       iter != parts.end(); ++iter) {
233    info_list.push_back(DisplayInfo::CreateFromSpec(*iter));
234  }
235  MaybeInitInternalDisplay(info_list[0].id());
236  if (info_list.size() > 1 &&
237      command_line->HasSwitch(switches::kAshEnableSoftwareMirroring)) {
238    SetSecondDisplayMode(MIRRORING);
239  }
240  OnNativeDisplaysChanged(info_list);
241  return true;
242}
243
244void DisplayManager::InitDefaultDisplay() {
245  DisplayInfoList info_list;
246  info_list.push_back(DisplayInfo::CreateFromSpec(std::string()));
247  MaybeInitInternalDisplay(info_list[0].id());
248  OnNativeDisplaysChanged(info_list);
249}
250
251// static
252void DisplayManager::UpdateDisplayBoundsForLayoutById(
253    const DisplayLayout& layout,
254    const gfx::Display& primary_display,
255    int64 secondary_display_id) {
256  DCHECK_NE(gfx::Display::kInvalidDisplayID, secondary_display_id);
257  UpdateDisplayBoundsForLayout(
258      layout, primary_display,
259      Shell::GetInstance()->display_manager()->
260      FindDisplayForId(secondary_display_id));
261}
262
263bool DisplayManager::IsActiveDisplay(const gfx::Display& display) const {
264  for (DisplayList::const_iterator iter = displays_.begin();
265       iter != displays_.end(); ++iter) {
266    if ((*iter).id() == display.id())
267      return true;
268  }
269  return false;
270}
271
272bool DisplayManager::HasInternalDisplay() const {
273  return gfx::Display::InternalDisplayId() != gfx::Display::kInvalidDisplayID;
274}
275
276bool DisplayManager::IsInternalDisplayId(int64 id) const {
277  return gfx::Display::InternalDisplayId() == id;
278}
279
280DisplayLayout DisplayManager::GetCurrentDisplayLayout() {
281  DCHECK_EQ(2U, num_connected_displays());
282  // Invert if the primary was swapped.
283  if (num_connected_displays() > 1) {
284    DisplayIdPair pair = GetCurrentDisplayIdPair();
285    return layout_store_->ComputeDisplayLayoutForDisplayIdPair(pair);
286  }
287  NOTREACHED() << "DisplayLayout is requested for single display";
288  // On release build, just fallback to default instead of blowing up.
289  DisplayLayout layout =
290      layout_store_->default_display_layout();
291  layout.primary_id = displays_[0].id();
292  return layout;
293}
294
295DisplayIdPair DisplayManager::GetCurrentDisplayIdPair() const {
296  if (IsMirrored()) {
297    if (software_mirroring_enabled()) {
298      CHECK_EQ(2u, num_connected_displays());
299      // This comment is to make it easy to distinguish the crash
300      // between two checks.
301      CHECK_EQ(1u, displays_.size());
302    }
303    return std::make_pair(displays_[0].id(), mirrored_display_id_);
304  } else {
305    CHECK_GE(2u, displays_.size());
306    int64 id_at_zero = displays_[0].id();
307    if (id_at_zero == gfx::Display::InternalDisplayId() ||
308        id_at_zero == first_display_id()) {
309      return std::make_pair(id_at_zero, displays_[1].id());
310    } else {
311      return std::make_pair(displays_[1].id(), id_at_zero);
312    }
313  }
314}
315
316void DisplayManager::SetLayoutForCurrentDisplays(
317    const DisplayLayout& layout_relative_to_primary) {
318  DCHECK_EQ(2U, GetNumDisplays());
319  if (GetNumDisplays() < 2)
320    return;
321  const gfx::Display& primary = screen_->GetPrimaryDisplay();
322  const DisplayIdPair pair = GetCurrentDisplayIdPair();
323  // Invert if the primary was swapped.
324  DisplayLayout to_set = pair.first == primary.id() ?
325      layout_relative_to_primary : layout_relative_to_primary.Invert();
326
327  DisplayLayout current_layout =
328      layout_store_->GetRegisteredDisplayLayout(pair);
329  if (to_set.position != current_layout.position ||
330      to_set.offset != current_layout.offset) {
331    to_set.primary_id = primary.id();
332    layout_store_->RegisterLayoutForDisplayIdPair(
333        pair.first, pair.second, to_set);
334    if (delegate_)
335      delegate_->PreDisplayConfigurationChange(false);
336    // PreDisplayConfigurationChange(false);
337    // TODO(oshima): Call UpdateDisplays instead.
338    const DisplayLayout layout = GetCurrentDisplayLayout();
339    UpdateDisplayBoundsForLayoutById(
340        layout, primary,
341        ScreenUtil::GetSecondaryDisplay().id());
342
343    // Primary's bounds stay the same. Just notify bounds change
344    // on the secondary.
345    screen_ash_->NotifyBoundsChanged(
346        ScreenUtil::GetSecondaryDisplay());
347    if (delegate_)
348      delegate_->PostDisplayConfigurationChange();
349  }
350}
351
352const gfx::Display& DisplayManager::GetDisplayForId(int64 id) const {
353  gfx::Display* display =
354      const_cast<DisplayManager*>(this)->FindDisplayForId(id);
355  return display ? *display : GetInvalidDisplay();
356}
357
358const gfx::Display& DisplayManager::FindDisplayContainingPoint(
359    const gfx::Point& point_in_screen) const {
360  for (DisplayList::const_iterator iter = displays_.begin();
361       iter != displays_.end(); ++iter) {
362    const gfx::Display& display = *iter;
363    if (display.bounds().Contains(point_in_screen))
364      return display;
365  }
366  return GetInvalidDisplay();
367}
368
369bool DisplayManager::UpdateWorkAreaOfDisplay(int64 display_id,
370                                             const gfx::Insets& insets) {
371  gfx::Display* display = FindDisplayForId(display_id);
372  DCHECK(display);
373  gfx::Rect old_work_area = display->work_area();
374  display->UpdateWorkAreaFromInsets(insets);
375  return old_work_area != display->work_area();
376}
377
378void DisplayManager::SetOverscanInsets(int64 display_id,
379                                       const gfx::Insets& insets_in_dip) {
380  display_info_[display_id].SetOverscanInsets(insets_in_dip);
381  DisplayInfoList display_info_list;
382  for (DisplayList::const_iterator iter = displays_.begin();
383       iter != displays_.end(); ++iter) {
384    display_info_list.push_back(GetDisplayInfo(iter->id()));
385  }
386  AddMirrorDisplayInfoIfAny(&display_info_list);
387  UpdateDisplays(display_info_list);
388}
389
390void DisplayManager::SetDisplayRotation(int64 display_id,
391                                        gfx::Display::Rotation rotation) {
392  DisplayInfoList display_info_list;
393  for (DisplayList::const_iterator iter = displays_.begin();
394       iter != displays_.end(); ++iter) {
395    DisplayInfo info = GetDisplayInfo(iter->id());
396    if (info.id() == display_id) {
397      if (info.rotation() == rotation)
398        return;
399      info.set_rotation(rotation);
400    }
401    display_info_list.push_back(info);
402  }
403  AddMirrorDisplayInfoIfAny(&display_info_list);
404  if (virtual_keyboard_root_window_enabled() &&
405      display_id == non_desktop_display_.id()) {
406    DisplayInfo info = GetDisplayInfo(display_id);
407    info.set_rotation(rotation);
408    display_info_list.push_back(info);
409  }
410  UpdateDisplays(display_info_list);
411}
412
413void DisplayManager::SetDisplayUIScale(int64 display_id,
414                                       float ui_scale) {
415  if (!IsDisplayUIScalingEnabled() ||
416      gfx::Display::InternalDisplayId() != display_id) {
417    return;
418  }
419
420  DisplayInfoList display_info_list;
421  for (DisplayList::const_iterator iter = displays_.begin();
422       iter != displays_.end(); ++iter) {
423    DisplayInfo info = GetDisplayInfo(iter->id());
424    if (info.id() == display_id) {
425      if (info.configured_ui_scale() == ui_scale)
426        return;
427      std::vector<float> scales = GetScalesForDisplay(info);
428      ScaleComparator comparator(ui_scale);
429      if (std::find_if(scales.begin(), scales.end(), comparator) ==
430          scales.end()) {
431        return;
432      }
433      info.set_configured_ui_scale(ui_scale);
434    }
435    display_info_list.push_back(info);
436  }
437  AddMirrorDisplayInfoIfAny(&display_info_list);
438  UpdateDisplays(display_info_list);
439}
440
441void DisplayManager::SetDisplayResolution(int64 display_id,
442                                          const gfx::Size& resolution) {
443  DCHECK_NE(gfx::Display::InternalDisplayId(), display_id);
444  if (gfx::Display::InternalDisplayId() == display_id)
445    return;
446  const DisplayInfo& display_info = GetDisplayInfo(display_id);
447  const std::vector<DisplayMode>& modes = display_info.display_modes();
448  DCHECK_NE(0u, modes.size());
449  std::vector<DisplayMode>::const_iterator iter =
450      std::find_if(modes.begin(), modes.end(), DisplayModeMatcher(resolution));
451  if (iter == modes.end()) {
452    LOG(WARNING) << "Unsupported resolution was requested:"
453                 << resolution.ToString();
454    return;
455  }
456  display_modes_[display_id] = *iter;
457#if defined(OS_CHROMEOS)
458  if (base::SysInfo::IsRunningOnChromeOS())
459    Shell::GetInstance()->output_configurator()->OnConfigurationChanged();
460#endif
461}
462
463void DisplayManager::RegisterDisplayProperty(
464    int64 display_id,
465    gfx::Display::Rotation rotation,
466    float ui_scale,
467    const gfx::Insets* overscan_insets,
468    const gfx::Size& resolution_in_pixels,
469    ui::ColorCalibrationProfile color_profile) {
470  if (display_info_.find(display_id) == display_info_.end())
471    display_info_[display_id] = DisplayInfo(display_id, std::string(), false);
472
473  display_info_[display_id].set_rotation(rotation);
474  display_info_[display_id].SetColorProfile(color_profile);
475  // Just in case the preference file was corrupted.
476  if (0.5f <= ui_scale && ui_scale <= 2.0f)
477    display_info_[display_id].set_configured_ui_scale(ui_scale);
478  if (overscan_insets)
479    display_info_[display_id].SetOverscanInsets(*overscan_insets);
480  if (!resolution_in_pixels.IsEmpty()) {
481    // Default refresh rate, until OnNativeDisplaysChanged() updates us with the
482    // actual display info, is 60 Hz.
483    display_modes_[display_id] =
484        DisplayMode(resolution_in_pixels, 60.0f, false, false);
485  }
486}
487
488bool DisplayManager::GetSelectedModeForDisplayId(int64 id,
489                                                 DisplayMode* mode_out) const {
490  std::map<int64, DisplayMode>::const_iterator iter = display_modes_.find(id);
491  if (iter == display_modes_.end())
492    return false;
493  *mode_out = iter->second;
494  return true;
495}
496
497bool DisplayManager::IsDisplayUIScalingEnabled() const {
498  return GetDisplayIdForUIScaling() != gfx::Display::kInvalidDisplayID;
499}
500
501gfx::Insets DisplayManager::GetOverscanInsets(int64 display_id) const {
502  std::map<int64, DisplayInfo>::const_iterator it =
503      display_info_.find(display_id);
504  return (it != display_info_.end()) ?
505      it->second.overscan_insets_in_dip() : gfx::Insets();
506}
507
508void DisplayManager::SetColorCalibrationProfile(
509    int64 display_id,
510    ui::ColorCalibrationProfile profile) {
511#if defined(OS_CHROMEOS)
512  if (!display_info_[display_id].IsColorProfileAvailable(profile))
513    return;
514
515  if (delegate_)
516    delegate_->PreDisplayConfigurationChange(false);
517  if (Shell::GetInstance()->output_configurator()->SetColorCalibrationProfile(
518          display_id, profile)) {
519    display_info_[display_id].SetColorProfile(profile);
520    UMA_HISTOGRAM_ENUMERATION(
521        "ChromeOS.Display.ColorProfile", profile, ui::NUM_COLOR_PROFILES);
522  }
523  if (delegate_)
524    delegate_->PostDisplayConfigurationChange();
525#endif
526}
527
528void DisplayManager::OnNativeDisplaysChanged(
529    const std::vector<DisplayInfo>& updated_displays) {
530  if (updated_displays.empty()) {
531    VLOG(1) << "OnNativeDisplayChanged(0): # of current displays="
532            << displays_.size();
533    // If the device is booted without display, or chrome is started
534    // without --ash-host-window-bounds on linux desktop, use the
535    // default display.
536    if (displays_.empty()) {
537      std::vector<DisplayInfo> init_displays;
538      init_displays.push_back(DisplayInfo::CreateFromSpec(std::string()));
539      MaybeInitInternalDisplay(init_displays[0].id());
540      OnNativeDisplaysChanged(init_displays);
541    } else {
542      // Otherwise don't update the displays when all displays are disconnected.
543      // This happens when:
544      // - the device is idle and powerd requested to turn off all displays.
545      // - the device is suspended. (kernel turns off all displays)
546      // - the internal display's brightness is set to 0 and no external
547      //   display is connected.
548      // - the internal display's brightness is 0 and external display is
549      //   disconnected.
550      // The display will be updated when one of displays is turned on, and the
551      // display list will be updated correctly.
552    }
553    return;
554  }
555  first_display_id_ = updated_displays[0].id();
556  std::set<gfx::Point> origins;
557
558  if (updated_displays.size() == 1) {
559    VLOG(1) << "OnNativeDisplaysChanged(1):" << updated_displays[0].ToString();
560  } else {
561    VLOG(1) << "OnNativeDisplaysChanged(" << updated_displays.size()
562            << ") [0]=" << updated_displays[0].ToString()
563            << ", [1]=" << updated_displays[1].ToString();
564  }
565
566  bool internal_display_connected = false;
567  num_connected_displays_ = updated_displays.size();
568  mirrored_display_id_ = gfx::Display::kInvalidDisplayID;
569  non_desktop_display_ = gfx::Display();
570  DisplayInfoList new_display_info_list;
571  for (DisplayInfoList::const_iterator iter = updated_displays.begin();
572       iter != updated_displays.end();
573       ++iter) {
574    if (!internal_display_connected)
575      internal_display_connected = IsInternalDisplayId(iter->id());
576    // Mirrored monitors have the same origins.
577    gfx::Point origin = iter->bounds_in_native().origin();
578    if (origins.find(origin) != origins.end()) {
579      InsertAndUpdateDisplayInfo(*iter);
580      mirrored_display_id_ = iter->id();
581    } else {
582      origins.insert(origin);
583      new_display_info_list.push_back(*iter);
584    }
585
586    const gfx::Size& resolution = iter->bounds_in_native().size();
587    const std::vector<DisplayMode>& display_modes = iter->display_modes();
588    // This is empty the displays are initialized from InitFromCommandLine.
589    if (!display_modes.size())
590      continue;
591    std::vector<DisplayMode>::const_iterator display_modes_iter =
592        std::find_if(display_modes.begin(),
593                     display_modes.end(),
594                     DisplayModeMatcher(resolution));
595    // Update the actual resolution selected as the resolution request may fail.
596    if (display_modes_iter == display_modes.end())
597      display_modes_.erase(iter->id());
598    else if (display_modes_.find(iter->id()) != display_modes_.end())
599      display_modes_[iter->id()] = *display_modes_iter;
600  }
601  if (HasInternalDisplay() &&
602      !internal_display_connected &&
603      display_info_.find(gfx::Display::InternalDisplayId()) ==
604      display_info_.end()) {
605    DisplayInfo internal_display_info(
606        gfx::Display::InternalDisplayId(),
607        l10n_util::GetStringUTF8(IDS_ASH_INTERNAL_DISPLAY_NAME),
608        false  /*Internal display must not have overscan */);
609    internal_display_info.SetBounds(gfx::Rect(0, 0, 800, 600));
610    display_info_[gfx::Display::InternalDisplayId()] = internal_display_info;
611  }
612  UpdateDisplays(new_display_info_list);
613}
614
615void DisplayManager::UpdateDisplays() {
616  DisplayInfoList display_info_list;
617  for (DisplayList::const_iterator iter = displays_.begin();
618       iter != displays_.end(); ++iter) {
619    display_info_list.push_back(GetDisplayInfo(iter->id()));
620  }
621  AddMirrorDisplayInfoIfAny(&display_info_list);
622  UpdateDisplays(display_info_list);
623}
624
625void DisplayManager::UpdateDisplays(
626    const std::vector<DisplayInfo>& updated_display_info_list) {
627#if defined(OS_WIN)
628  if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
629    DCHECK_EQ(1u, updated_display_info_list.size()) <<
630        "Multiple display test does not work on Win8 bots. Please "
631        "skip (don't disable) the test using SupportsMultipleDisplays()";
632  }
633#endif
634
635  DisplayInfoList new_display_info_list = updated_display_info_list;
636  std::sort(displays_.begin(), displays_.end(), DisplaySortFunctor());
637  std::sort(new_display_info_list.begin(),
638            new_display_info_list.end(),
639            DisplayInfoSortFunctor());
640  DisplayList removed_displays;
641  std::vector<size_t> changed_display_indices;
642  std::vector<size_t> added_display_indices;
643
644  DisplayList::iterator curr_iter = displays_.begin();
645  DisplayInfoList::const_iterator new_info_iter = new_display_info_list.begin();
646
647  DisplayList new_displays;
648
649  // Use the internal display or 1st as the mirror source, then scale
650  // the root window so that it matches the external display's
651  // resolution. This is necessary in order for scaling to work while
652  // mirrored.
653  int64 non_desktop_display_id = gfx::Display::kInvalidDisplayID;
654
655  if (second_display_mode_ != EXTENDED && new_display_info_list.size() == 2) {
656    bool zero_is_source =
657        first_display_id_ == new_display_info_list[0].id() ||
658        gfx::Display::InternalDisplayId() == new_display_info_list[0].id();
659    if (second_display_mode_ == MIRRORING) {
660      mirrored_display_id_ = new_display_info_list[zero_is_source ? 1 : 0].id();
661      non_desktop_display_id = mirrored_display_id_;
662    } else {
663      // TODO(oshima|bshe): The virtual keyboard is currently assigned to
664      // the 1st display.
665      non_desktop_display_id =
666          new_display_info_list[zero_is_source ? 0 : 1].id();
667    }
668  }
669
670  while (curr_iter != displays_.end() ||
671         new_info_iter != new_display_info_list.end()) {
672    if (new_info_iter != new_display_info_list.end() &&
673        non_desktop_display_id == new_info_iter->id()) {
674      DisplayInfo info = *new_info_iter;
675      info.SetOverscanInsets(gfx::Insets());
676      InsertAndUpdateDisplayInfo(info);
677      non_desktop_display_ =
678          CreateDisplayFromDisplayInfoById(non_desktop_display_id);
679      ++new_info_iter;
680      // Remove existing external display if it is going to be used as
681      // non desktop.
682      if (curr_iter != displays_.end() &&
683          curr_iter->id() == non_desktop_display_id) {
684        removed_displays.push_back(*curr_iter);
685        ++curr_iter;
686      }
687      continue;
688    }
689
690    if (curr_iter == displays_.end()) {
691      // more displays in new list.
692      added_display_indices.push_back(new_displays.size());
693      InsertAndUpdateDisplayInfo(*new_info_iter);
694      new_displays.push_back(
695          CreateDisplayFromDisplayInfoById(new_info_iter->id()));
696      ++new_info_iter;
697    } else if (new_info_iter == new_display_info_list.end()) {
698      // more displays in current list.
699      removed_displays.push_back(*curr_iter);
700      ++curr_iter;
701    } else if (curr_iter->id() == new_info_iter->id()) {
702      const gfx::Display& current_display = *curr_iter;
703      // Copy the info because |CreateDisplayFromInfo| updates the instance.
704      const DisplayInfo current_display_info =
705          GetDisplayInfo(current_display.id());
706      InsertAndUpdateDisplayInfo(*new_info_iter);
707      gfx::Display new_display =
708          CreateDisplayFromDisplayInfoById(new_info_iter->id());
709      const DisplayInfo& new_display_info = GetDisplayInfo(new_display.id());
710
711      bool host_window_bounds_changed =
712          current_display_info.bounds_in_native() !=
713          new_display_info.bounds_in_native();
714
715      if (force_bounds_changed_ ||
716          host_window_bounds_changed ||
717          (current_display.device_scale_factor() !=
718           new_display.device_scale_factor()) ||
719          (current_display_info.size_in_pixel() !=
720           new_display.GetSizeInPixel()) ||
721          (current_display.rotation() != new_display.rotation())) {
722        changed_display_indices.push_back(new_displays.size());
723      }
724
725      new_display.UpdateWorkAreaFromInsets(current_display.GetWorkAreaInsets());
726      new_displays.push_back(new_display);
727      ++curr_iter;
728      ++new_info_iter;
729    } else if (curr_iter->id() < new_info_iter->id()) {
730      // more displays in current list between ids, which means it is deleted.
731      removed_displays.push_back(*curr_iter);
732      ++curr_iter;
733    } else {
734      // more displays in new list between ids, which means it is added.
735      added_display_indices.push_back(new_displays.size());
736      InsertAndUpdateDisplayInfo(*new_info_iter);
737      new_displays.push_back(
738          CreateDisplayFromDisplayInfoById(new_info_iter->id()));
739      ++new_info_iter;
740    }
741  }
742
743  scoped_ptr<NonDesktopDisplayUpdater> non_desktop_display_updater(
744      new NonDesktopDisplayUpdater(this, delegate_));
745
746  // Do not update |displays_| if there's nothing to be updated. Without this,
747  // it will not update the display layout, which causes the bug
748  // http://crbug.com/155948.
749  if (changed_display_indices.empty() && added_display_indices.empty() &&
750      removed_displays.empty()) {
751    return;
752  }
753  // Clear focus if the display has been removed, but don't clear focus if
754  // the destkop has been moved from one display to another
755  // (mirror -> docked, docked -> single internal).
756  bool clear_focus =
757      !removed_displays.empty() &&
758      !(removed_displays.size() == 1 && added_display_indices.size() == 1);
759  if (delegate_)
760    delegate_->PreDisplayConfigurationChange(clear_focus);
761
762  size_t updated_index;
763  if (UpdateSecondaryDisplayBoundsForLayout(&new_displays, &updated_index) &&
764      std::find(added_display_indices.begin(),
765                added_display_indices.end(),
766                updated_index) == added_display_indices.end() &&
767      std::find(changed_display_indices.begin(),
768                changed_display_indices.end(),
769                updated_index) == changed_display_indices.end()) {
770    changed_display_indices.push_back(updated_index);
771  }
772
773  displays_ = new_displays;
774
775  base::AutoReset<bool> resetter(&change_display_upon_host_resize_, false);
776
777  // Temporarily add displays to be removed because display object
778  // being removed are accessed during shutting down the root.
779  displays_.insert(displays_.end(), removed_displays.begin(),
780                   removed_displays.end());
781
782  for (DisplayList::const_reverse_iterator iter = removed_displays.rbegin();
783       iter != removed_displays.rend(); ++iter) {
784    screen_ash_->NotifyDisplayRemoved(displays_.back());
785    displays_.pop_back();
786  }
787  // Close the non desktop window here to avoid creating two compositor on
788  // one display.
789  if (!non_desktop_display_updater->enabled())
790    non_desktop_display_updater.reset();
791  for (std::vector<size_t>::iterator iter = added_display_indices.begin();
792       iter != added_display_indices.end(); ++iter) {
793    screen_ash_->NotifyDisplayAdded(displays_[*iter]);
794  }
795  // Create the non destkop window after all displays are added so that
796  // it can mirror the display newly added. This can happen when switching
797  // from dock mode to software mirror mode.
798  non_desktop_display_updater.reset();
799  for (std::vector<size_t>::iterator iter = changed_display_indices.begin();
800       iter != changed_display_indices.end(); ++iter) {
801    screen_ash_->NotifyBoundsChanged(displays_[*iter]);
802  }
803  if (delegate_)
804    delegate_->PostDisplayConfigurationChange();
805
806#if defined(USE_X11) && defined(OS_CHROMEOS)
807  if (!changed_display_indices.empty() && base::SysInfo::IsRunningOnChromeOS())
808    ui::ClearX11DefaultRootWindow();
809#endif
810}
811
812const gfx::Display& DisplayManager::GetDisplayAt(size_t index) const {
813  DCHECK_LT(index, displays_.size());
814  return displays_[index];
815}
816
817const gfx::Display& DisplayManager::GetPrimaryDisplayCandidate() const {
818  if (GetNumDisplays() == 1)
819    return displays_[0];
820  DisplayLayout layout = layout_store_->GetRegisteredDisplayLayout(
821      GetCurrentDisplayIdPair());
822  return GetDisplayForId(layout.primary_id);
823}
824
825size_t DisplayManager::GetNumDisplays() const {
826  return displays_.size();
827}
828
829bool DisplayManager::IsMirrored() const {
830  return mirrored_display_id_ != gfx::Display::kInvalidDisplayID;
831}
832
833const DisplayInfo& DisplayManager::GetDisplayInfo(int64 display_id) const {
834  std::map<int64, DisplayInfo>::const_iterator iter =
835      display_info_.find(display_id);
836  CHECK(iter != display_info_.end()) << display_id;
837  return iter->second;
838}
839
840std::string DisplayManager::GetDisplayNameForId(int64 id) {
841  if (id == gfx::Display::kInvalidDisplayID)
842    return l10n_util::GetStringUTF8(IDS_ASH_STATUS_TRAY_UNKNOWN_DISPLAY_NAME);
843
844  std::map<int64, DisplayInfo>::const_iterator iter = display_info_.find(id);
845  if (iter != display_info_.end() && !iter->second.name().empty())
846    return iter->second.name();
847
848  return base::StringPrintf("Display %d", static_cast<int>(id));
849}
850
851int64 DisplayManager::GetDisplayIdForUIScaling() const {
852  // UI Scaling is effective only on internal display.
853  int64 display_id = gfx::Display::InternalDisplayId();
854#if defined(OS_WIN)
855  display_id = first_display_id();
856#endif
857  return display_id;
858}
859
860void DisplayManager::SetMirrorMode(bool mirrored) {
861  if (num_connected_displays() <= 1)
862    return;
863
864#if defined(OS_CHROMEOS)
865  if (base::SysInfo::IsRunningOnChromeOS()) {
866    ui::OutputState new_state = mirrored ? ui::OUTPUT_STATE_DUAL_MIRROR :
867                                           ui::OUTPUT_STATE_DUAL_EXTENDED;
868    Shell::GetInstance()->output_configurator()->SetDisplayMode(new_state);
869    return;
870  }
871#endif
872  // This is fallback path to emulate mirroroing on desktop.
873  SetSecondDisplayMode(mirrored ? MIRRORING : EXTENDED);
874  DisplayInfoList display_info_list;
875  int count = 0;
876  for (std::map<int64, DisplayInfo>::const_iterator iter =
877           display_info_.begin();
878       count < 2; ++iter, ++count) {
879    display_info_list.push_back(GetDisplayInfo(iter->second.id()));
880  }
881  UpdateDisplays(display_info_list);
882#if defined(OS_CHROMEOS)
883  if (Shell::GetInstance()->output_configurator_animation()) {
884    Shell::GetInstance()->output_configurator_animation()->
885        StartFadeInAnimation();
886  }
887#endif
888}
889
890void DisplayManager::AddRemoveDisplay() {
891  DCHECK(!displays_.empty());
892  std::vector<DisplayInfo> new_display_info_list;
893  const DisplayInfo& first_display = GetDisplayInfo(displays_[0].id());
894  new_display_info_list.push_back(first_display);
895  // Add if there is only one display connected.
896  if (num_connected_displays() == 1) {
897    // Layout the 2nd display below the primary as with the real device.
898    gfx::Rect host_bounds = first_display.bounds_in_native();
899    new_display_info_list.push_back(DisplayInfo::CreateFromSpec(
900        base::StringPrintf(
901            "%d+%d-500x400", host_bounds.x(), host_bounds.bottom())));
902  }
903  num_connected_displays_ = new_display_info_list.size();
904  mirrored_display_id_ = gfx::Display::kInvalidDisplayID;
905  non_desktop_display_ = gfx::Display();
906  UpdateDisplays(new_display_info_list);
907}
908
909void DisplayManager::ToggleDisplayScaleFactor() {
910  DCHECK(!displays_.empty());
911  std::vector<DisplayInfo> new_display_info_list;
912  for (DisplayList::const_iterator iter = displays_.begin();
913       iter != displays_.end(); ++iter) {
914    DisplayInfo display_info = GetDisplayInfo(iter->id());
915    display_info.set_device_scale_factor(
916        display_info.device_scale_factor() == 1.0f ? 2.0f : 1.0f);
917    new_display_info_list.push_back(display_info);
918  }
919  AddMirrorDisplayInfoIfAny(&new_display_info_list);
920  UpdateDisplays(new_display_info_list);
921}
922
923#if defined(OS_CHROMEOS)
924void DisplayManager::SetSoftwareMirroring(bool enabled) {
925  // TODO(oshima|bshe): Support external display on the system
926  // that has virtual keyboard display.
927  if (second_display_mode_ == VIRTUAL_KEYBOARD)
928    return;
929  SetSecondDisplayMode(enabled ? MIRRORING : EXTENDED);
930}
931#endif
932
933void DisplayManager::SetSecondDisplayMode(SecondDisplayMode mode) {
934  second_display_mode_ = mode;
935  mirrored_display_id_ = gfx::Display::kInvalidDisplayID;
936  non_desktop_display_ = gfx::Display();
937}
938
939bool DisplayManager::UpdateDisplayBounds(int64 display_id,
940                                         const gfx::Rect& new_bounds) {
941  if (change_display_upon_host_resize_) {
942    display_info_[display_id].SetBounds(new_bounds);
943    // Don't notify observers if the mirrored window has changed.
944    if (software_mirroring_enabled() && mirrored_display_id_ == display_id)
945      return false;
946    gfx::Display* display = FindDisplayForId(display_id);
947    display->SetSize(display_info_[display_id].size_in_pixel());
948    screen_ash_->NotifyBoundsChanged(*display);
949    return true;
950  }
951  return false;
952}
953
954void DisplayManager::CreateMirrorWindowIfAny() {
955  NonDesktopDisplayUpdater updater(this, delegate_);
956}
957
958void DisplayManager::CreateScreenForShutdown() const {
959  bool native_is_ash =
960      gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_NATIVE) ==
961      screen_ash_.get();
962  delete screen_for_shutdown;
963  screen_for_shutdown = screen_ash_->CloneForShutdown();
964  gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_ALTERNATE,
965                                 screen_for_shutdown);
966  if (native_is_ash) {
967    gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE,
968                                   screen_for_shutdown);
969  }
970}
971
972gfx::Display* DisplayManager::FindDisplayForId(int64 id) {
973  for (DisplayList::iterator iter = displays_.begin();
974       iter != displays_.end(); ++iter) {
975    if ((*iter).id() == id)
976      return &(*iter);
977  }
978  DLOG(WARNING) << "Could not find display:" << id;
979  return NULL;
980}
981
982void DisplayManager::AddMirrorDisplayInfoIfAny(
983    std::vector<DisplayInfo>* display_info_list) {
984  if (software_mirroring_enabled() && IsMirrored())
985    display_info_list->push_back(GetDisplayInfo(mirrored_display_id_));
986}
987
988void DisplayManager::InsertAndUpdateDisplayInfo(const DisplayInfo& new_info) {
989  std::map<int64, DisplayInfo>::iterator info =
990      display_info_.find(new_info.id());
991  if (info != display_info_.end()) {
992    info->second.Copy(new_info);
993  } else {
994    display_info_[new_info.id()] = new_info;
995    display_info_[new_info.id()].set_native(false);
996  }
997  display_info_[new_info.id()].UpdateDisplaySize();
998
999  OnDisplayInfoUpdated(display_info_[new_info.id()]);
1000}
1001
1002void DisplayManager::OnDisplayInfoUpdated(const DisplayInfo& display_info) {
1003#if defined(OS_CHROMEOS)
1004  ui::ColorCalibrationProfile color_profile = display_info.color_profile();
1005  if (color_profile != ui::COLOR_PROFILE_STANDARD) {
1006    Shell::GetInstance()->output_configurator()->SetColorCalibrationProfile(
1007        display_info.id(), color_profile);
1008  }
1009#endif
1010}
1011
1012gfx::Display DisplayManager::CreateDisplayFromDisplayInfoById(int64 id) {
1013  DCHECK(display_info_.find(id) != display_info_.end());
1014  const DisplayInfo& display_info = display_info_[id];
1015
1016  gfx::Display new_display(display_info.id());
1017  gfx::Rect bounds_in_native(display_info.size_in_pixel());
1018  float device_scale_factor = display_info.device_scale_factor();
1019  if (device_scale_factor == 2.0f && display_info.configured_ui_scale() == 2.0f)
1020    device_scale_factor = 1.0f;
1021
1022  // Simply set the origin to (0,0).  The primary display's origin is
1023  // always (0,0) and the secondary display's bounds will be updated
1024  // in |UpdateSecondaryDisplayBoundsForLayout| called in |UpdateDisplay|.
1025  new_display.SetScaleAndBounds(
1026      device_scale_factor, gfx::Rect(bounds_in_native.size()));
1027  new_display.set_rotation(display_info.rotation());
1028  new_display.set_touch_support(display_info.touch_support());
1029  return new_display;
1030}
1031
1032bool DisplayManager::UpdateSecondaryDisplayBoundsForLayout(
1033    DisplayList* displays,
1034    size_t* updated_index) const {
1035  if (displays->size() != 2U)
1036    return false;
1037
1038  int64 id_at_zero = displays->at(0).id();
1039  DisplayIdPair pair =
1040      (id_at_zero == first_display_id_ ||
1041       id_at_zero == gfx::Display::InternalDisplayId()) ?
1042      std::make_pair(id_at_zero, displays->at(1).id()) :
1043      std::make_pair(displays->at(1).id(), id_at_zero);
1044  DisplayLayout layout =
1045      layout_store_->ComputeDisplayLayoutForDisplayIdPair(pair);
1046
1047  // Ignore if a user has a old format (should be extremely rare)
1048  // and this will be replaced with DCHECK.
1049  if (layout.primary_id != gfx::Display::kInvalidDisplayID) {
1050    size_t primary_index, secondary_index;
1051    if (displays->at(0).id() == layout.primary_id) {
1052      primary_index = 0;
1053      secondary_index = 1;
1054    } else {
1055      primary_index = 1;
1056      secondary_index = 0;
1057    }
1058    // This function may be called before the secondary display is
1059    // registered. The bounds is empty in that case and will
1060    // return true.
1061    gfx::Rect bounds =
1062        GetDisplayForId(displays->at(secondary_index).id()).bounds();
1063    UpdateDisplayBoundsForLayout(
1064        layout, displays->at(primary_index), &displays->at(secondary_index));
1065    *updated_index = secondary_index;
1066    return bounds != displays->at(secondary_index).bounds();
1067  }
1068  return false;
1069}
1070
1071// static
1072void DisplayManager::UpdateDisplayBoundsForLayout(
1073    const DisplayLayout& layout,
1074    const gfx::Display& primary_display,
1075    gfx::Display* secondary_display) {
1076  DCHECK_EQ("0,0", primary_display.bounds().origin().ToString());
1077
1078  const gfx::Rect& primary_bounds = primary_display.bounds();
1079  const gfx::Rect& secondary_bounds = secondary_display->bounds();
1080  gfx::Point new_secondary_origin = primary_bounds.origin();
1081
1082  DisplayLayout::Position position = layout.position;
1083
1084  // Ignore the offset in case the secondary display doesn't share edges with
1085  // the primary display.
1086  int offset = layout.offset;
1087  if (position == DisplayLayout::TOP || position == DisplayLayout::BOTTOM) {
1088    offset = std::min(
1089        offset, primary_bounds.width() - kMinimumOverlapForInvalidOffset);
1090    offset = std::max(
1091        offset, -secondary_bounds.width() + kMinimumOverlapForInvalidOffset);
1092  } else {
1093    offset = std::min(
1094        offset, primary_bounds.height() - kMinimumOverlapForInvalidOffset);
1095    offset = std::max(
1096        offset, -secondary_bounds.height() + kMinimumOverlapForInvalidOffset);
1097  }
1098  switch (position) {
1099    case DisplayLayout::TOP:
1100      new_secondary_origin.Offset(offset, -secondary_bounds.height());
1101      break;
1102    case DisplayLayout::RIGHT:
1103      new_secondary_origin.Offset(primary_bounds.width(), offset);
1104      break;
1105    case DisplayLayout::BOTTOM:
1106      new_secondary_origin.Offset(offset, primary_bounds.height());
1107      break;
1108    case DisplayLayout::LEFT:
1109      new_secondary_origin.Offset(-secondary_bounds.width(), offset);
1110      break;
1111  }
1112  gfx::Insets insets = secondary_display->GetWorkAreaInsets();
1113  secondary_display->set_bounds(
1114      gfx::Rect(new_secondary_origin, secondary_bounds.size()));
1115  secondary_display->UpdateWorkAreaFromInsets(insets);
1116}
1117
1118}  // namespace internal
1119}  // namespace ash
1120