display_manager.cc revision cedac228d2dd51db4b79ea1e72c7f249408ee061 
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/base/layout.h"
28#include "ui/base/resource/resource_bundle.h"
29#include "ui/gfx/display.h"
30#include "ui/gfx/display_observer.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
48namespace ash {
49typedef std::vector<gfx::Display> DisplayList;
50typedef std::vector<DisplayInfo> DisplayInfoList;
51
52namespace {
53
54// We need to keep this in order for unittests to tell if
55// the object in gfx::Screen::GetScreenByType is for shutdown.
56gfx::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.
60const 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.
66const float kUIScalesFor2x[] =
67    {0.5f, 0.625f, 0.8f, 1.0f, 1.125f, 1.25f, 1.5f, 2.0f};
68const float kUIScalesFor1280[] = {0.5f, 0.625f, 0.8f, 1.0f, 1.125f };
69const float kUIScalesFor1366[] = {0.5f, 0.6f, 0.75f, 1.0f, 1.125f };
70
71struct DisplaySortFunctor {
72  bool operator()(const gfx::Display& a, const gfx::Display& b) {
73    return a.id() < b.id();
74  }
75};
76
77struct DisplayInfoSortFunctor {
78  bool operator()(const DisplayInfo& a, const DisplayInfo& b) {
79    return a.id() < b.id();
80  }
81};
82
83struct DisplayModeMatcher {
84  DisplayModeMatcher(const gfx::Size& size) : size(size) {}
85  bool operator()(const DisplayMode& mode) { return mode.size == size; }
86  gfx::Size size;
87};
88
89struct ScaleComparator {
90  explicit ScaleComparator(float s) : scale(s) {}
91
92  bool operator()(float s) const {
93    const float kEpsilon = 0.0001f;
94    return std::abs(scale - s) < kEpsilon;
95  }
96  float scale;
97};
98
99gfx::Display& GetInvalidDisplay() {
100  static gfx::Display* invalid_display = new gfx::Display();
101  return *invalid_display;
102}
103
104void MaybeInitInternalDisplay(int64 id) {
105  CommandLine* command_line = CommandLine::ForCurrentProcess();
106  if (command_line->HasSwitch(switches::kAshUseFirstDisplayAsInternal))
107    gfx::Display::SetInternalDisplayId(id);
108}
109
110// Scoped objects used to either create or close the non desktop window
111// at specific timing.
112class NonDesktopDisplayUpdater {
113 public:
114  NonDesktopDisplayUpdater(DisplayManager* manager,
115                           DisplayManager::Delegate* delegate)
116      : manager_(manager),
117        delegate_(delegate),
118        enabled_(manager_->second_display_mode() != DisplayManager::EXTENDED &&
119                 manager_->non_desktop_display().is_valid()) {
120  }
121
122  ~NonDesktopDisplayUpdater() {
123    if (!delegate_)
124      return;
125
126    if (enabled_) {
127      DisplayInfo display_info = manager_->GetDisplayInfo(
128          manager_->non_desktop_display().id());
129      delegate_->CreateOrUpdateNonDesktopDisplay(display_info);
130    } else {
131      delegate_->CloseNonDesktopDisplay();
132    }
133  }
134
135  bool enabled() const { return enabled_; }
136
137 private:
138  DisplayManager* manager_;
139  DisplayManager::Delegate* delegate_;
140  bool enabled_;
141  DISALLOW_COPY_AND_ASSIGN(NonDesktopDisplayUpdater);
142};
143
144}  // namespace
145
146using std::string;
147using std::vector;
148
149DisplayManager::DisplayManager()
150    : delegate_(NULL),
151      screen_ash_(new ScreenAsh),
152      screen_(screen_ash_.get()),
153      layout_store_(new DisplayLayoutStore),
154      first_display_id_(gfx::Display::kInvalidDisplayID),
155      num_connected_displays_(0),
156      force_bounds_changed_(false),
157      change_display_upon_host_resize_(false),
158      second_display_mode_(EXTENDED),
159      mirrored_display_id_(gfx::Display::kInvalidDisplayID) {
160#if defined(OS_CHROMEOS)
161  change_display_upon_host_resize_ = !base::SysInfo::IsRunningOnChromeOS();
162#endif
163  DisplayInfo::SetAllowUpgradeToHighDPI(
164      ui::ResourceBundle::GetSharedInstance().GetMaxScaleFactor() ==
165      ui::SCALE_FACTOR_200P);
166
167  gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_ALTERNATE,
168                                 screen_ash_.get());
169  gfx::Screen* current_native =
170      gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_NATIVE);
171  // If there is no native, or the native was for shutdown,
172  // use ash's screen.
173  if (!current_native ||
174      current_native == screen_for_shutdown) {
175    gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE,
176                                   screen_ash_.get());
177  }
178}
179
180DisplayManager::~DisplayManager() {
181}
182
183// static
184std::vector<float> DisplayManager::GetScalesForDisplay(
185    const DisplayInfo& info) {
186  std::vector<float> ret;
187  if (info.device_scale_factor() == 2.0f) {
188    ret.assign(kUIScalesFor2x, kUIScalesFor2x + arraysize(kUIScalesFor2x));
189    return ret;
190  }
191  switch (info.bounds_in_native().width()) {
192    case 1280:
193      ret.assign(kUIScalesFor1280,
194                 kUIScalesFor1280 + arraysize(kUIScalesFor1280));
195      break;
196    case 1366:
197      ret.assign(kUIScalesFor1366,
198                 kUIScalesFor1366 + arraysize(kUIScalesFor1366));
199      break;
200    default:
201      ret.assign(kUIScalesFor1280,
202                 kUIScalesFor1280 + arraysize(kUIScalesFor1280));
203#if defined(OS_CHROMEOS)
204      if (base::SysInfo::IsRunningOnChromeOS())
205        NOTREACHED() << "Unknown resolution:" << info.ToString();
206#endif
207  }
208  return ret;
209}
210
211// static
212float DisplayManager::GetNextUIScale(const DisplayInfo& info, bool up) {
213  float scale = info.configured_ui_scale();
214  std::vector<float> scales = GetScalesForDisplay(info);
215  for (size_t i = 0; i < scales.size(); ++i) {
216    if (ScaleComparator(scales[i])(scale)) {
217      if (up && i != scales.size() - 1)
218        return scales[i + 1];
219      if (!up && i != 0)
220        return scales[i - 1];
221      return scales[i];
222    }
223  }
224  // Fallback to 1.0f if the |scale| wasn't in the list.
225  return 1.0f;
226}
227
228bool DisplayManager::InitFromCommandLine() {
229  DisplayInfoList info_list;
230  CommandLine* command_line = CommandLine::ForCurrentProcess();
231  if (!command_line->HasSwitch(switches::kAshHostWindowBounds))
232    return false;
233  const string size_str =
234      command_line->GetSwitchValueASCII(switches::kAshHostWindowBounds);
235  vector<string> parts;
236  base::SplitString(size_str, ',', &parts);
237  for (vector<string>::const_iterator iter = parts.begin();
238       iter != parts.end(); ++iter) {
239    info_list.push_back(DisplayInfo::CreateFromSpec(*iter));
240  }
241  MaybeInitInternalDisplay(info_list[0].id());
242  if (info_list.size() > 1 &&
243      command_line->HasSwitch(switches::kAshEnableSoftwareMirroring)) {
244    SetSecondDisplayMode(MIRRORING);
245  }
246  OnNativeDisplaysChanged(info_list);
247  return true;
248}
249
250void DisplayManager::InitDefaultDisplay() {
251  DisplayInfoList info_list;
252  info_list.push_back(DisplayInfo::CreateFromSpec(std::string()));
253  MaybeInitInternalDisplay(info_list[0].id());
254  OnNativeDisplaysChanged(info_list);
255}
256
257// static
258void DisplayManager::UpdateDisplayBoundsForLayoutById(
259    const DisplayLayout& layout,
260    const gfx::Display& primary_display,
261    int64 secondary_display_id) {
262  DCHECK_NE(gfx::Display::kInvalidDisplayID, secondary_display_id);
263  UpdateDisplayBoundsForLayout(
264      layout, primary_display,
265      Shell::GetInstance()->display_manager()->
266      FindDisplayForId(secondary_display_id));
267}
268
269bool DisplayManager::IsActiveDisplay(const gfx::Display& display) const {
270  for (DisplayList::const_iterator iter = displays_.begin();
271       iter != displays_.end(); ++iter) {
272    if ((*iter).id() == display.id())
273      return true;
274  }
275  return false;
276}
277
278bool DisplayManager::HasInternalDisplay() const {
279  return gfx::Display::InternalDisplayId() != gfx::Display::kInvalidDisplayID;
280}
281
282bool DisplayManager::IsInternalDisplayId(int64 id) const {
283  return gfx::Display::InternalDisplayId() == id;
284}
285
286DisplayLayout DisplayManager::GetCurrentDisplayLayout() {
287  DCHECK_EQ(2U, num_connected_displays());
288  // Invert if the primary was swapped.
289  if (num_connected_displays() > 1) {
290    DisplayIdPair pair = GetCurrentDisplayIdPair();
291    return layout_store_->ComputeDisplayLayoutForDisplayIdPair(pair);
292  }
293  NOTREACHED() << "DisplayLayout is requested for single display";
294  // On release build, just fallback to default instead of blowing up.
295  DisplayLayout layout =
296      layout_store_->default_display_layout();
297  layout.primary_id = displays_[0].id();
298  return layout;
299}
300
301DisplayIdPair DisplayManager::GetCurrentDisplayIdPair() const {
302  if (IsMirrored()) {
303    if (software_mirroring_enabled()) {
304      CHECK_EQ(2u, num_connected_displays());
305      // This comment is to make it easy to distinguish the crash
306      // between two checks.
307      CHECK_EQ(1u, displays_.size());
308    }
309    return std::make_pair(displays_[0].id(), mirrored_display_id_);
310  } else {
311    CHECK_GE(2u, displays_.size());
312    int64 id_at_zero = displays_[0].id();
313    if (id_at_zero == gfx::Display::InternalDisplayId() ||
314        id_at_zero == first_display_id()) {
315      return std::make_pair(id_at_zero, displays_[1].id());
316    } else {
317      return std::make_pair(displays_[1].id(), id_at_zero);
318    }
319  }
320}
321
322void DisplayManager::SetLayoutForCurrentDisplays(
323    const DisplayLayout& layout_relative_to_primary) {
324  DCHECK_EQ(2U, GetNumDisplays());
325  if (GetNumDisplays() < 2)
326    return;
327  const gfx::Display& primary = screen_->GetPrimaryDisplay();
328  const DisplayIdPair pair = GetCurrentDisplayIdPair();
329  // Invert if the primary was swapped.
330  DisplayLayout to_set = pair.first == primary.id() ?
331      layout_relative_to_primary : layout_relative_to_primary.Invert();
332
333  DisplayLayout current_layout =
334      layout_store_->GetRegisteredDisplayLayout(pair);
335  if (to_set.position != current_layout.position ||
336      to_set.offset != current_layout.offset) {
337    to_set.primary_id = primary.id();
338    layout_store_->RegisterLayoutForDisplayIdPair(
339        pair.first, pair.second, to_set);
340    if (delegate_)
341      delegate_->PreDisplayConfigurationChange(false);
342    // PreDisplayConfigurationChange(false);
343    // TODO(oshima): Call UpdateDisplays instead.
344    const DisplayLayout layout = GetCurrentDisplayLayout();
345    UpdateDisplayBoundsForLayoutById(
346        layout, primary,
347        ScreenUtil::GetSecondaryDisplay().id());
348
349    // Primary's bounds stay the same. Just notify bounds change
350    // on the secondary.
351    screen_ash_->NotifyMetricsChanged(
352        ScreenUtil::GetSecondaryDisplay(),
353        gfx::DisplayObserver::DISPLAY_METRIC_BOUNDS |
354            gfx::DisplayObserver::DISPLAY_METRIC_WORK_AREA);
355    if (delegate_)
356      delegate_->PostDisplayConfigurationChange();
357  }
358}
359
360const gfx::Display& DisplayManager::GetDisplayForId(int64 id) const {
361  gfx::Display* display =
362      const_cast<DisplayManager*>(this)->FindDisplayForId(id);
363  return display ? *display : GetInvalidDisplay();
364}
365
366const gfx::Display& DisplayManager::FindDisplayContainingPoint(
367    const gfx::Point& point_in_screen) const {
368  for (DisplayList::const_iterator iter = displays_.begin();
369       iter != displays_.end(); ++iter) {
370    const gfx::Display& display = *iter;
371    if (display.bounds().Contains(point_in_screen))
372      return display;
373  }
374  return GetInvalidDisplay();
375}
376
377bool DisplayManager::UpdateWorkAreaOfDisplay(int64 display_id,
378                                             const gfx::Insets& insets) {
379  gfx::Display* display = FindDisplayForId(display_id);
380  DCHECK(display);
381  gfx::Rect old_work_area = display->work_area();
382  display->UpdateWorkAreaFromInsets(insets);
383  return old_work_area != display->work_area();
384}
385
386void DisplayManager::SetOverscanInsets(int64 display_id,
387                                       const gfx::Insets& insets_in_dip) {
388  display_info_[display_id].SetOverscanInsets(insets_in_dip);
389  DisplayInfoList display_info_list;
390  for (DisplayList::const_iterator iter = displays_.begin();
391       iter != displays_.end(); ++iter) {
392    display_info_list.push_back(GetDisplayInfo(iter->id()));
393  }
394  AddMirrorDisplayInfoIfAny(&display_info_list);
395  UpdateDisplays(display_info_list);
396}
397
398void DisplayManager::SetDisplayRotation(int64 display_id,
399                                        gfx::Display::Rotation rotation) {
400  DisplayInfoList display_info_list;
401  for (DisplayList::const_iterator iter = displays_.begin();
402       iter != displays_.end(); ++iter) {
403    DisplayInfo info = GetDisplayInfo(iter->id());
404    if (info.id() == display_id) {
405      if (info.rotation() == rotation)
406        return;
407      info.set_rotation(rotation);
408    }
409    display_info_list.push_back(info);
410  }
411  AddMirrorDisplayInfoIfAny(&display_info_list);
412  if (virtual_keyboard_root_window_enabled() &&
413      display_id == non_desktop_display_.id()) {
414    DisplayInfo info = GetDisplayInfo(display_id);
415    info.set_rotation(rotation);
416    display_info_list.push_back(info);
417  }
418  UpdateDisplays(display_info_list);
419}
420
421void DisplayManager::SetDisplayUIScale(int64 display_id,
422                                       float ui_scale) {
423  if (!IsDisplayUIScalingEnabled() ||
424      gfx::Display::InternalDisplayId() != display_id) {
425    return;
426  }
427
428  DisplayInfoList display_info_list;
429  for (DisplayList::const_iterator iter = displays_.begin();
430       iter != displays_.end(); ++iter) {
431    DisplayInfo info = GetDisplayInfo(iter->id());
432    if (info.id() == display_id) {
433      if (info.configured_ui_scale() == ui_scale)
434        return;
435      std::vector<float> scales = GetScalesForDisplay(info);
436      ScaleComparator comparator(ui_scale);
437      if (std::find_if(scales.begin(), scales.end(), comparator) ==
438          scales.end()) {
439        return;
440      }
441      info.set_configured_ui_scale(ui_scale);
442    }
443    display_info_list.push_back(info);
444  }
445  AddMirrorDisplayInfoIfAny(&display_info_list);
446  UpdateDisplays(display_info_list);
447}
448
449void DisplayManager::SetDisplayResolution(int64 display_id,
450                                          const gfx::Size& resolution) {
451  DCHECK_NE(gfx::Display::InternalDisplayId(), display_id);
452  if (gfx::Display::InternalDisplayId() == display_id)
453    return;
454  const DisplayInfo& display_info = GetDisplayInfo(display_id);
455  const std::vector<DisplayMode>& modes = display_info.display_modes();
456  DCHECK_NE(0u, modes.size());
457  std::vector<DisplayMode>::const_iterator iter =
458      std::find_if(modes.begin(), modes.end(), DisplayModeMatcher(resolution));
459  if (iter == modes.end()) {
460    LOG(WARNING) << "Unsupported resolution was requested:"
461                 << resolution.ToString();
462    return;
463  }
464  display_modes_[display_id] = *iter;
465#if defined(OS_CHROMEOS)
466  if (base::SysInfo::IsRunningOnChromeOS())
467    Shell::GetInstance()->display_configurator()->OnConfigurationChanged();
468#endif
469}
470
471void DisplayManager::RegisterDisplayProperty(
472    int64 display_id,
473    gfx::Display::Rotation rotation,
474    float ui_scale,
475    const gfx::Insets* overscan_insets,
476    const gfx::Size& resolution_in_pixels,
477    ui::ColorCalibrationProfile color_profile) {
478  if (display_info_.find(display_id) == display_info_.end())
479    display_info_[display_id] = DisplayInfo(display_id, std::string(), false);
480
481  display_info_[display_id].set_rotation(rotation);
482  display_info_[display_id].SetColorProfile(color_profile);
483  // Just in case the preference file was corrupted.
484  if (0.5f <= ui_scale && ui_scale <= 2.0f)
485    display_info_[display_id].set_configured_ui_scale(ui_scale);
486  if (overscan_insets)
487    display_info_[display_id].SetOverscanInsets(*overscan_insets);
488  if (!resolution_in_pixels.IsEmpty()) {
489    // Default refresh rate, until OnNativeDisplaysChanged() updates us with the
490    // actual display info, is 60 Hz.
491    display_modes_[display_id] =
492        DisplayMode(resolution_in_pixels, 60.0f, false, false);
493  }
494}
495
496bool DisplayManager::GetSelectedModeForDisplayId(int64 id,
497                                                 DisplayMode* mode_out) const {
498  std::map<int64, DisplayMode>::const_iterator iter = display_modes_.find(id);
499  if (iter == display_modes_.end())
500    return false;
501  *mode_out = iter->second;
502  return true;
503}
504
505bool DisplayManager::IsDisplayUIScalingEnabled() const {
506  return GetDisplayIdForUIScaling() != gfx::Display::kInvalidDisplayID;
507}
508
509gfx::Insets DisplayManager::GetOverscanInsets(int64 display_id) const {
510  std::map<int64, DisplayInfo>::const_iterator it =
511      display_info_.find(display_id);
512  return (it != display_info_.end()) ?
513      it->second.overscan_insets_in_dip() : gfx::Insets();
514}
515
516void DisplayManager::SetColorCalibrationProfile(
517    int64 display_id,
518    ui::ColorCalibrationProfile profile) {
519#if defined(OS_CHROMEOS)
520  if (!display_info_[display_id].IsColorProfileAvailable(profile))
521    return;
522
523  if (delegate_)
524    delegate_->PreDisplayConfigurationChange(false);
525  // Just sets color profile if it's not running on ChromeOS (like tests).
526  if (!base::SysInfo::IsRunningOnChromeOS() ||
527      Shell::GetInstance()->display_configurator()->SetColorCalibrationProfile(
528          display_id, profile)) {
529    display_info_[display_id].SetColorProfile(profile);
530    UMA_HISTOGRAM_ENUMERATION(
531        "ChromeOS.Display.ColorProfile", profile, ui::NUM_COLOR_PROFILES);
532  }
533  if (delegate_)
534    delegate_->PostDisplayConfigurationChange();
535#endif
536}
537
538void DisplayManager::OnNativeDisplaysChanged(
539    const std::vector<DisplayInfo>& updated_displays) {
540  if (updated_displays.empty()) {
541    VLOG(1) << "OnNativeDisplayChanged(0): # of current displays="
542            << displays_.size();
543    // If the device is booted without display, or chrome is started
544    // without --ash-host-window-bounds on linux desktop, use the
545    // default display.
546    if (displays_.empty()) {
547      std::vector<DisplayInfo> init_displays;
548      init_displays.push_back(DisplayInfo::CreateFromSpec(std::string()));
549      MaybeInitInternalDisplay(init_displays[0].id());
550      OnNativeDisplaysChanged(init_displays);
551    } else {
552      // Otherwise don't update the displays when all displays are disconnected.
553      // This happens when:
554      // - the device is idle and powerd requested to turn off all displays.
555      // - the device is suspended. (kernel turns off all displays)
556      // - the internal display's brightness is set to 0 and no external
557      //   display is connected.
558      // - the internal display's brightness is 0 and external display is
559      //   disconnected.
560      // The display will be updated when one of displays is turned on, and the
561      // display list will be updated correctly.
562    }
563    return;
564  }
565  first_display_id_ = updated_displays[0].id();
566  std::set<gfx::Point> origins;
567
568  if (updated_displays.size() == 1) {
569    VLOG(1) << "OnNativeDisplaysChanged(1):" << updated_displays[0].ToString();
570  } else {
571    VLOG(1) << "OnNativeDisplaysChanged(" << updated_displays.size()
572            << ") [0]=" << updated_displays[0].ToString()
573            << ", [1]=" << updated_displays[1].ToString();
574  }
575
576  bool internal_display_connected = false;
577  num_connected_displays_ = updated_displays.size();
578  mirrored_display_id_ = gfx::Display::kInvalidDisplayID;
579  non_desktop_display_ = gfx::Display();
580  DisplayInfoList new_display_info_list;
581  for (DisplayInfoList::const_iterator iter = updated_displays.begin();
582       iter != updated_displays.end();
583       ++iter) {
584    if (!internal_display_connected)
585      internal_display_connected = IsInternalDisplayId(iter->id());
586    // Mirrored monitors have the same origins.
587    gfx::Point origin = iter->bounds_in_native().origin();
588    if (origins.find(origin) != origins.end()) {
589      InsertAndUpdateDisplayInfo(*iter);
590      mirrored_display_id_ = iter->id();
591    } else {
592      origins.insert(origin);
593      new_display_info_list.push_back(*iter);
594    }
595
596    const gfx::Size& resolution = iter->bounds_in_native().size();
597    const std::vector<DisplayMode>& display_modes = iter->display_modes();
598    // This is empty the displays are initialized from InitFromCommandLine.
599    if (!display_modes.size())
600      continue;
601    std::vector<DisplayMode>::const_iterator display_modes_iter =
602        std::find_if(display_modes.begin(),
603                     display_modes.end(),
604                     DisplayModeMatcher(resolution));
605    // Update the actual resolution selected as the resolution request may fail.
606    if (display_modes_iter == display_modes.end())
607      display_modes_.erase(iter->id());
608    else if (display_modes_.find(iter->id()) != display_modes_.end())
609      display_modes_[iter->id()] = *display_modes_iter;
610  }
611  if (HasInternalDisplay() &&
612      !internal_display_connected &&
613      display_info_.find(gfx::Display::InternalDisplayId()) ==
614      display_info_.end()) {
615    DisplayInfo internal_display_info(
616        gfx::Display::InternalDisplayId(),
617        l10n_util::GetStringUTF8(IDS_ASH_INTERNAL_DISPLAY_NAME),
618        false  /*Internal display must not have overscan */);
619    internal_display_info.SetBounds(gfx::Rect(0, 0, 800, 600));
620    display_info_[gfx::Display::InternalDisplayId()] = internal_display_info;
621  }
622  UpdateDisplays(new_display_info_list);
623}
624
625void DisplayManager::UpdateDisplays() {
626  DisplayInfoList display_info_list;
627  for (DisplayList::const_iterator iter = displays_.begin();
628       iter != displays_.end(); ++iter) {
629    display_info_list.push_back(GetDisplayInfo(iter->id()));
630  }
631  AddMirrorDisplayInfoIfAny(&display_info_list);
632  UpdateDisplays(display_info_list);
633}
634
635void DisplayManager::UpdateDisplays(
636    const std::vector<DisplayInfo>& updated_display_info_list) {
637#if defined(OS_WIN)
638  DCHECK_EQ(1u, updated_display_info_list.size()) <<
639      ": Multiple display test does not work on Windows bots. Please "
640      "skip (don't disable) the test using SupportsMultipleDisplays()";
641#endif
642
643  DisplayInfoList new_display_info_list = updated_display_info_list;
644  std::sort(displays_.begin(), displays_.end(), DisplaySortFunctor());
645  std::sort(new_display_info_list.begin(),
646            new_display_info_list.end(),
647            DisplayInfoSortFunctor());
648  DisplayList removed_displays;
649  std::map<size_t, uint32_t> display_changes;
650  std::vector<size_t> added_display_indices;
651
652  DisplayList::iterator curr_iter = displays_.begin();
653  DisplayInfoList::const_iterator new_info_iter = new_display_info_list.begin();
654
655  DisplayList new_displays;
656
657  // Use the internal display or 1st as the mirror source, then scale
658  // the root window so that it matches the external display's
659  // resolution. This is necessary in order for scaling to work while
660  // mirrored.
661  int64 non_desktop_display_id = gfx::Display::kInvalidDisplayID;
662
663  if (second_display_mode_ != EXTENDED && new_display_info_list.size() == 2) {
664    bool zero_is_source =
665        first_display_id_ == new_display_info_list[0].id() ||
666        gfx::Display::InternalDisplayId() == new_display_info_list[0].id();
667    if (second_display_mode_ == MIRRORING) {
668      mirrored_display_id_ = new_display_info_list[zero_is_source ? 1 : 0].id();
669      non_desktop_display_id = mirrored_display_id_;
670    } else {
671      // TODO(oshima|bshe): The virtual keyboard is currently assigned to
672      // the 1st display.
673      non_desktop_display_id =
674          new_display_info_list[zero_is_source ? 0 : 1].id();
675    }
676  }
677
678  while (curr_iter != displays_.end() ||
679         new_info_iter != new_display_info_list.end()) {
680    if (new_info_iter != new_display_info_list.end() &&
681        non_desktop_display_id == new_info_iter->id()) {
682      DisplayInfo info = *new_info_iter;
683      info.SetOverscanInsets(gfx::Insets());
684      InsertAndUpdateDisplayInfo(info);
685      non_desktop_display_ =
686          CreateDisplayFromDisplayInfoById(non_desktop_display_id);
687      ++new_info_iter;
688      // Remove existing external display if it is going to be used as
689      // non desktop.
690      if (curr_iter != displays_.end() &&
691          curr_iter->id() == non_desktop_display_id) {
692        removed_displays.push_back(*curr_iter);
693        ++curr_iter;
694      }
695      continue;
696    }
697
698    if (curr_iter == displays_.end()) {
699      // more displays in new list.
700      added_display_indices.push_back(new_displays.size());
701      InsertAndUpdateDisplayInfo(*new_info_iter);
702      new_displays.push_back(
703          CreateDisplayFromDisplayInfoById(new_info_iter->id()));
704      ++new_info_iter;
705    } else if (new_info_iter == new_display_info_list.end()) {
706      // more displays in current list.
707      removed_displays.push_back(*curr_iter);
708      ++curr_iter;
709    } else if (curr_iter->id() == new_info_iter->id()) {
710      const gfx::Display& current_display = *curr_iter;
711      // Copy the info because |CreateDisplayFromInfo| updates the instance.
712      const DisplayInfo current_display_info =
713          GetDisplayInfo(current_display.id());
714      InsertAndUpdateDisplayInfo(*new_info_iter);
715      gfx::Display new_display =
716          CreateDisplayFromDisplayInfoById(new_info_iter->id());
717      const DisplayInfo& new_display_info = GetDisplayInfo(new_display.id());
718
719      uint32_t metrics = gfx::DisplayObserver::DISPLAY_METRIC_NONE;
720
721      // At that point the new Display objects we have are not entirely updated,
722      // they are missing the translation related to the Display disposition in
723      // the layout.
724      // Using display.bounds() and display.work_area() would fail most of the
725      // time.
726      if (force_bounds_changed_ || (current_display_info.bounds_in_native() !=
727                                    new_display_info.bounds_in_native()) ||
728          (current_display_info.size_in_pixel() !=
729           new_display.GetSizeInPixel())) {
730        metrics |= gfx::DisplayObserver::DISPLAY_METRIC_BOUNDS |
731                   gfx::DisplayObserver::DISPLAY_METRIC_WORK_AREA;
732      }
733
734      if (current_display.device_scale_factor() !=
735          new_display.device_scale_factor()) {
736        metrics |= gfx::DisplayObserver::DISPLAY_METRIC_DEVICE_SCALE_FACTOR;
737      }
738
739      if (current_display.rotation() != new_display.rotation())
740        metrics |= gfx::DisplayObserver::DISPLAY_METRIC_ROTATION;
741
742      if (metrics != gfx::DisplayObserver::DISPLAY_METRIC_NONE) {
743        display_changes.insert(
744            std::pair<size_t, uint32_t>(new_displays.size(), metrics));
745      }
746
747      new_display.UpdateWorkAreaFromInsets(current_display.GetWorkAreaInsets());
748      new_displays.push_back(new_display);
749      ++curr_iter;
750      ++new_info_iter;
751    } else if (curr_iter->id() < new_info_iter->id()) {
752      // more displays in current list between ids, which means it is deleted.
753      removed_displays.push_back(*curr_iter);
754      ++curr_iter;
755    } else {
756      // more displays in new list between ids, which means it is added.
757      added_display_indices.push_back(new_displays.size());
758      InsertAndUpdateDisplayInfo(*new_info_iter);
759      new_displays.push_back(
760          CreateDisplayFromDisplayInfoById(new_info_iter->id()));
761      ++new_info_iter;
762    }
763  }
764
765  scoped_ptr<NonDesktopDisplayUpdater> non_desktop_display_updater(
766      new NonDesktopDisplayUpdater(this, delegate_));
767
768  // Do not update |displays_| if there's nothing to be updated. Without this,
769  // it will not update the display layout, which causes the bug
770  // http://crbug.com/155948.
771  if (display_changes.empty() && added_display_indices.empty() &&
772      removed_displays.empty()) {
773    return;
774  }
775  // Clear focus if the display has been removed, but don't clear focus if
776  // the destkop has been moved from one display to another
777  // (mirror -> docked, docked -> single internal).
778  bool clear_focus =
779      !removed_displays.empty() &&
780      !(removed_displays.size() == 1 && added_display_indices.size() == 1);
781  if (delegate_)
782    delegate_->PreDisplayConfigurationChange(clear_focus);
783
784  size_t updated_index;
785  if (UpdateSecondaryDisplayBoundsForLayout(&new_displays, &updated_index) &&
786      std::find(added_display_indices.begin(),
787                added_display_indices.end(),
788                updated_index) == added_display_indices.end()) {
789    uint32_t metrics = gfx::DisplayObserver::DISPLAY_METRIC_BOUNDS |
790                       gfx::DisplayObserver::DISPLAY_METRIC_WORK_AREA;
791    if (display_changes.find(updated_index) != display_changes.end())
792      metrics |= display_changes[updated_index];
793
794    display_changes[updated_index] = metrics;
795  }
796
797  displays_ = new_displays;
798
799  base::AutoReset<bool> resetter(&change_display_upon_host_resize_, false);
800
801  // Temporarily add displays to be removed because display object
802  // being removed are accessed during shutting down the root.
803  displays_.insert(displays_.end(), removed_displays.begin(),
804                   removed_displays.end());
805
806  for (DisplayList::const_reverse_iterator iter = removed_displays.rbegin();
807       iter != removed_displays.rend(); ++iter) {
808    screen_ash_->NotifyDisplayRemoved(displays_.back());
809    displays_.pop_back();
810  }
811  // Close the non desktop window here to avoid creating two compositor on
812  // one display.
813  if (!non_desktop_display_updater->enabled())
814    non_desktop_display_updater.reset();
815  for (std::vector<size_t>::iterator iter = added_display_indices.begin();
816       iter != added_display_indices.end(); ++iter) {
817    screen_ash_->NotifyDisplayAdded(displays_[*iter]);
818  }
819  // Create the non destkop window after all displays are added so that
820  // it can mirror the display newly added. This can happen when switching
821  // from dock mode to software mirror mode.
822  non_desktop_display_updater.reset();
823  for (std::map<size_t, uint32_t>::iterator iter = display_changes.begin();
824       iter != display_changes.end();
825       ++iter) {
826    screen_ash_->NotifyMetricsChanged(displays_[iter->first], iter->second);
827  }
828  if (delegate_)
829    delegate_->PostDisplayConfigurationChange();
830
831#if defined(USE_X11) && defined(OS_CHROMEOS)
832  if (!display_changes.empty() && base::SysInfo::IsRunningOnChromeOS())
833    ui::ClearX11DefaultRootWindow();
834#endif
835}
836
837const gfx::Display& DisplayManager::GetDisplayAt(size_t index) const {
838  DCHECK_LT(index, displays_.size());
839  return displays_[index];
840}
841
842const gfx::Display& DisplayManager::GetPrimaryDisplayCandidate() const {
843  if (GetNumDisplays() == 1)
844    return displays_[0];
845  DisplayLayout layout = layout_store_->GetRegisteredDisplayLayout(
846      GetCurrentDisplayIdPair());
847  return GetDisplayForId(layout.primary_id);
848}
849
850size_t DisplayManager::GetNumDisplays() const {
851  return displays_.size();
852}
853
854bool DisplayManager::IsMirrored() const {
855  return mirrored_display_id_ != gfx::Display::kInvalidDisplayID;
856}
857
858const DisplayInfo& DisplayManager::GetDisplayInfo(int64 display_id) const {
859  DCHECK_NE(gfx::Display::kInvalidDisplayID, display_id);
860
861  std::map<int64, DisplayInfo>::const_iterator iter =
862      display_info_.find(display_id);
863  CHECK(iter != display_info_.end()) << display_id;
864  return iter->second;
865}
866
867std::string DisplayManager::GetDisplayNameForId(int64 id) {
868  if (id == gfx::Display::kInvalidDisplayID)
869    return l10n_util::GetStringUTF8(IDS_ASH_STATUS_TRAY_UNKNOWN_DISPLAY_NAME);
870
871  std::map<int64, DisplayInfo>::const_iterator iter = display_info_.find(id);
872  if (iter != display_info_.end() && !iter->second.name().empty())
873    return iter->second.name();
874
875  return base::StringPrintf("Display %d", static_cast<int>(id));
876}
877
878int64 DisplayManager::GetDisplayIdForUIScaling() const {
879  // UI Scaling is effective only on internal display.
880  int64 display_id = gfx::Display::InternalDisplayId();
881#if defined(OS_WIN)
882  display_id = first_display_id();
883#endif
884  return display_id;
885}
886
887void DisplayManager::SetMirrorMode(bool mirrored) {
888  if (num_connected_displays() <= 1)
889    return;
890
891#if defined(OS_CHROMEOS)
892  if (base::SysInfo::IsRunningOnChromeOS()) {
893    ui::MultipleDisplayState new_state =
894        mirrored ? ui::MULTIPLE_DISPLAY_STATE_DUAL_MIRROR :
895                   ui::MULTIPLE_DISPLAY_STATE_DUAL_EXTENDED;
896    Shell::GetInstance()->display_configurator()->SetDisplayMode(new_state);
897    return;
898  }
899#endif
900  // This is fallback path to emulate mirroroing on desktop.
901  SetSecondDisplayMode(mirrored ? MIRRORING : EXTENDED);
902  DisplayInfoList display_info_list;
903  int count = 0;
904  for (std::map<int64, DisplayInfo>::const_iterator iter =
905           display_info_.begin();
906       count < 2; ++iter, ++count) {
907    display_info_list.push_back(GetDisplayInfo(iter->second.id()));
908  }
909  UpdateDisplays(display_info_list);
910#if defined(OS_CHROMEOS)
911  if (Shell::GetInstance()->display_configurator_animation()) {
912    Shell::GetInstance()->display_configurator_animation()->
913        StartFadeInAnimation();
914  }
915#endif
916}
917
918void DisplayManager::AddRemoveDisplay() {
919  DCHECK(!displays_.empty());
920  std::vector<DisplayInfo> new_display_info_list;
921  const DisplayInfo& first_display = GetDisplayInfo(displays_[0].id());
922  new_display_info_list.push_back(first_display);
923  // Add if there is only one display connected.
924  if (num_connected_displays() == 1) {
925    // Layout the 2nd display below the primary as with the real device.
926    gfx::Rect host_bounds = first_display.bounds_in_native();
927    new_display_info_list.push_back(DisplayInfo::CreateFromSpec(
928        base::StringPrintf(
929            "%d+%d-500x400", host_bounds.x(), host_bounds.bottom())));
930  }
931  num_connected_displays_ = new_display_info_list.size();
932  mirrored_display_id_ = gfx::Display::kInvalidDisplayID;
933  non_desktop_display_ = gfx::Display();
934  UpdateDisplays(new_display_info_list);
935}
936
937void DisplayManager::ToggleDisplayScaleFactor() {
938  DCHECK(!displays_.empty());
939  std::vector<DisplayInfo> new_display_info_list;
940  for (DisplayList::const_iterator iter = displays_.begin();
941       iter != displays_.end(); ++iter) {
942    DisplayInfo display_info = GetDisplayInfo(iter->id());
943    display_info.set_device_scale_factor(
944        display_info.device_scale_factor() == 1.0f ? 2.0f : 1.0f);
945    new_display_info_list.push_back(display_info);
946  }
947  AddMirrorDisplayInfoIfAny(&new_display_info_list);
948  UpdateDisplays(new_display_info_list);
949}
950
951#if defined(OS_CHROMEOS)
952void DisplayManager::SetSoftwareMirroring(bool enabled) {
953  // TODO(oshima|bshe): Support external display on the system
954  // that has virtual keyboard display.
955  if (second_display_mode_ == VIRTUAL_KEYBOARD)
956    return;
957  SetSecondDisplayMode(enabled ? MIRRORING : EXTENDED);
958}
959
960bool DisplayManager::SoftwareMirroringEnabled() const {
961  return software_mirroring_enabled();
962}
963#endif
964
965void DisplayManager::SetSecondDisplayMode(SecondDisplayMode mode) {
966  second_display_mode_ = mode;
967  mirrored_display_id_ = gfx::Display::kInvalidDisplayID;
968  non_desktop_display_ = gfx::Display();
969}
970
971bool DisplayManager::UpdateDisplayBounds(int64 display_id,
972                                         const gfx::Rect& new_bounds) {
973  if (change_display_upon_host_resize_) {
974    display_info_[display_id].SetBounds(new_bounds);
975    // Don't notify observers if the mirrored window has changed.
976    if (software_mirroring_enabled() && mirrored_display_id_ == display_id)
977      return false;
978    gfx::Display* display = FindDisplayForId(display_id);
979    display->SetSize(display_info_[display_id].size_in_pixel());
980    screen_ash_->NotifyMetricsChanged(
981        *display, gfx::DisplayObserver::DISPLAY_METRIC_BOUNDS);
982    return true;
983  }
984  return false;
985}
986
987void DisplayManager::CreateMirrorWindowIfAny() {
988  NonDesktopDisplayUpdater updater(this, delegate_);
989}
990
991void DisplayManager::CreateScreenForShutdown() const {
992  bool native_is_ash =
993      gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_NATIVE) ==
994      screen_ash_.get();
995  delete screen_for_shutdown;
996  screen_for_shutdown = screen_ash_->CloneForShutdown();
997  gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_ALTERNATE,
998                                 screen_for_shutdown);
999  if (native_is_ash) {
1000    gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE,
1001                                   screen_for_shutdown);
1002  }
1003}
1004
1005gfx::Display* DisplayManager::FindDisplayForId(int64 id) {
1006  for (DisplayList::iterator iter = displays_.begin();
1007       iter != displays_.end(); ++iter) {
1008    if ((*iter).id() == id)
1009      return &(*iter);
1010  }
1011  DLOG(WARNING) << "Could not find display:" << id;
1012  return NULL;
1013}
1014
1015void DisplayManager::AddMirrorDisplayInfoIfAny(
1016    std::vector<DisplayInfo>* display_info_list) {
1017  if (software_mirroring_enabled() && IsMirrored())
1018    display_info_list->push_back(GetDisplayInfo(mirrored_display_id_));
1019}
1020
1021void DisplayManager::InsertAndUpdateDisplayInfo(const DisplayInfo& new_info) {
1022  std::map<int64, DisplayInfo>::iterator info =
1023      display_info_.find(new_info.id());
1024  if (info != display_info_.end()) {
1025    info->second.Copy(new_info);
1026  } else {
1027    display_info_[new_info.id()] = new_info;
1028    display_info_[new_info.id()].set_native(false);
1029  }
1030  display_info_[new_info.id()].UpdateDisplaySize();
1031
1032  OnDisplayInfoUpdated(display_info_[new_info.id()]);
1033}
1034
1035void DisplayManager::OnDisplayInfoUpdated(const DisplayInfo& display_info) {
1036#if defined(OS_CHROMEOS)
1037  ui::ColorCalibrationProfile color_profile = display_info.color_profile();
1038  if (color_profile != ui::COLOR_PROFILE_STANDARD) {
1039    Shell::GetInstance()->display_configurator()->SetColorCalibrationProfile(
1040        display_info.id(), color_profile);
1041  }
1042#endif
1043}
1044
1045gfx::Display DisplayManager::CreateDisplayFromDisplayInfoById(int64 id) {
1046  DCHECK(display_info_.find(id) != display_info_.end());
1047  const DisplayInfo& display_info = display_info_[id];
1048
1049  gfx::Display new_display(display_info.id());
1050  gfx::Rect bounds_in_native(display_info.size_in_pixel());
1051  float device_scale_factor = display_info.GetEffectiveDeviceScaleFactor();
1052
1053  // Simply set the origin to (0,0).  The primary display's origin is
1054  // always (0,0) and the secondary display's bounds will be updated
1055  // in |UpdateSecondaryDisplayBoundsForLayout| called in |UpdateDisplay|.
1056  new_display.SetScaleAndBounds(
1057      device_scale_factor, gfx::Rect(bounds_in_native.size()));
1058  new_display.set_rotation(display_info.rotation());
1059  new_display.set_touch_support(display_info.touch_support());
1060  return new_display;
1061}
1062
1063bool DisplayManager::UpdateSecondaryDisplayBoundsForLayout(
1064    DisplayList* displays,
1065    size_t* updated_index) const {
1066  if (displays->size() != 2U)
1067    return false;
1068
1069  int64 id_at_zero = displays->at(0).id();
1070  DisplayIdPair pair =
1071      (id_at_zero == first_display_id_ ||
1072       id_at_zero == gfx::Display::InternalDisplayId()) ?
1073      std::make_pair(id_at_zero, displays->at(1).id()) :
1074      std::make_pair(displays->at(1).id(), id_at_zero);
1075  DisplayLayout layout =
1076      layout_store_->ComputeDisplayLayoutForDisplayIdPair(pair);
1077
1078  // Ignore if a user has a old format (should be extremely rare)
1079  // and this will be replaced with DCHECK.
1080  if (layout.primary_id != gfx::Display::kInvalidDisplayID) {
1081    size_t primary_index, secondary_index;
1082    if (displays->at(0).id() == layout.primary_id) {
1083      primary_index = 0;
1084      secondary_index = 1;
1085    } else {
1086      primary_index = 1;
1087      secondary_index = 0;
1088    }
1089    // This function may be called before the secondary display is
1090    // registered. The bounds is empty in that case and will
1091    // return true.
1092    gfx::Rect bounds =
1093        GetDisplayForId(displays->at(secondary_index).id()).bounds();
1094    UpdateDisplayBoundsForLayout(
1095        layout, displays->at(primary_index), &displays->at(secondary_index));
1096    *updated_index = secondary_index;
1097    return bounds != displays->at(secondary_index).bounds();
1098  }
1099  return false;
1100}
1101
1102// static
1103void DisplayManager::UpdateDisplayBoundsForLayout(
1104    const DisplayLayout& layout,
1105    const gfx::Display& primary_display,
1106    gfx::Display* secondary_display) {
1107  DCHECK_EQ("0,0", primary_display.bounds().origin().ToString());
1108
1109  const gfx::Rect& primary_bounds = primary_display.bounds();
1110  const gfx::Rect& secondary_bounds = secondary_display->bounds();
1111  gfx::Point new_secondary_origin = primary_bounds.origin();
1112
1113  DisplayLayout::Position position = layout.position;
1114
1115  // Ignore the offset in case the secondary display doesn't share edges with
1116  // the primary display.
1117  int offset = layout.offset;
1118  if (position == DisplayLayout::TOP || position == DisplayLayout::BOTTOM) {
1119    offset = std::min(
1120        offset, primary_bounds.width() - kMinimumOverlapForInvalidOffset);
1121    offset = std::max(
1122        offset, -secondary_bounds.width() + kMinimumOverlapForInvalidOffset);
1123  } else {
1124    offset = std::min(
1125        offset, primary_bounds.height() - kMinimumOverlapForInvalidOffset);
1126    offset = std::max(
1127        offset, -secondary_bounds.height() + kMinimumOverlapForInvalidOffset);
1128  }
1129  switch (position) {
1130    case DisplayLayout::TOP:
1131      new_secondary_origin.Offset(offset, -secondary_bounds.height());
1132      break;
1133    case DisplayLayout::RIGHT:
1134      new_secondary_origin.Offset(primary_bounds.width(), offset);
1135      break;
1136    case DisplayLayout::BOTTOM:
1137      new_secondary_origin.Offset(offset, primary_bounds.height());
1138      break;
1139    case DisplayLayout::LEFT:
1140      new_secondary_origin.Offset(-secondary_bounds.width(), offset);
1141      break;
1142  }
1143  gfx::Insets insets = secondary_display->GetWorkAreaInsets();
1144  secondary_display->set_bounds(
1145      gfx::Rect(new_secondary_origin, secondary_bounds.size()));
1146  secondary_display->UpdateWorkAreaFromInsets(insets);
1147}
1148
1149}  // namespace ash
1150