display_manager.cc revision 7dbb3d5cf0c15f500944d211057644d6a2f37371 
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/screen_ash.h"
15#include "ash/shell.h"
16#include "base/auto_reset.h"
17#include "base/command_line.h"
18#include "base/logging.h"
19#include "base/strings/string_number_conversions.h"
20#include "base/strings/string_split.h"
21#include "base/strings/stringprintf.h"
22#include "base/strings/utf_string_conversions.h"
23#include "grit/ash_strings.h"
24#include "ui/base/l10n/l10n_util.h"
25#include "ui/gfx/display.h"
26#include "ui/gfx/rect.h"
27#include "ui/gfx/screen.h"
28#include "ui/gfx/size_conversions.h"
29
30#if defined(USE_X11)
31#include "ui/base/x/x11_util.h"
32#endif
33
34#if defined(OS_CHROMEOS)
35#include "ash/display/output_configurator_animation.h"
36#include "base/chromeos/chromeos_version.h"
37#include "chromeos/display/output_configurator.h"
38#endif
39
40#if defined(OS_WIN)
41#include "base/win/windows_version.h"
42#endif
43
44namespace ash {
45namespace internal {
46typedef std::vector<gfx::Display> DisplayList;
47typedef std::vector<DisplayInfo> DisplayInfoList;
48
49namespace {
50
51// The number of pixels to overlap between the primary and secondary displays,
52// in case that the offset value is too large.
53const int kMinimumOverlapForInvalidOffset = 100;
54
55// List of value UI Scale values. Scales for 2x are equivalent to 640,
56// 800, 1024, 1280, 1440, 1600 and 1920 pixel width respectively on
57// 2560 pixel width 2x density display. Please see crbug.com/233375
58// for the full list of resolutions.
59const float kUIScalesFor2x[] = {0.5f, 0.625f, 0.8f, 1.0f, 1.125f, 1.25f, 1.5f};
60const float kUIScalesFor1280[] = {0.5f, 0.625f, 0.8f, 1.0f, 1.125f };
61const float kUIScalesFor1366[] = {0.5f, 0.6f, 0.75f, 1.0f, 1.125f };
62
63struct DisplaySortFunctor {
64  bool operator()(const gfx::Display& a, const gfx::Display& b) {
65    return a.id() < b.id();
66  }
67};
68
69struct DisplayInfoSortFunctor {
70  bool operator()(const DisplayInfo& a, const DisplayInfo& b) {
71    return a.id() < b.id();
72  }
73};
74
75struct ScaleComparator {
76  ScaleComparator(float s) : scale(s) {}
77
78  bool operator()(float s) const {
79    const float kEpsilon = 0.0001f;
80    return std::abs(scale - s) < kEpsilon;
81  }
82  float scale;
83};
84
85gfx::Display& GetInvalidDisplay() {
86  static gfx::Display* invalid_display = new gfx::Display();
87  return *invalid_display;
88}
89
90// Scoped objects used to either create or close the mirror window
91// at specific timing.
92class MirrorWindowCreator {
93 public:
94  MirrorWindowCreator(DisplayManager::Delegate* delegate,
95                      const DisplayInfo& display_info)
96      : delegate_(delegate),
97        display_info_(display_info) {
98  }
99
100  virtual ~MirrorWindowCreator() {
101    if (delegate_)
102      delegate_->CreateOrUpdateMirrorWindow(display_info_);
103  }
104
105 private:
106  DisplayManager::Delegate* delegate_;
107  const DisplayInfo display_info_;
108  DISALLOW_COPY_AND_ASSIGN(MirrorWindowCreator);
109};
110
111class MirrorWindowCloser {
112 public:
113  explicit MirrorWindowCloser(DisplayManager::Delegate* delegate)
114      : delegate_(delegate)  {}
115
116  virtual ~MirrorWindowCloser() {
117    if (delegate_)
118      delegate_->CloseMirrorWindow();
119  }
120
121 private:
122  DisplayManager::Delegate* delegate_;
123
124  DISALLOW_COPY_AND_ASSIGN(MirrorWindowCloser);
125};
126
127}  // namespace
128
129using std::string;
130using std::vector;
131
132DisplayManager::DisplayManager()
133    : delegate_(NULL),
134      layout_store_(new DisplayLayoutStore),
135      first_display_id_(gfx::Display::kInvalidDisplayID),
136      num_connected_displays_(0),
137      force_bounds_changed_(false),
138      change_display_upon_host_resize_(false),
139      software_mirroring_enabled_(false) {
140#if defined(OS_CHROMEOS)
141  change_display_upon_host_resize_ = !base::chromeos::IsRunningOnChromeOS();
142#endif
143}
144
145DisplayManager::~DisplayManager() {
146}
147
148// static
149std::vector<float> DisplayManager::GetScalesForDisplay(
150    const DisplayInfo& info) {
151  std::vector<float> ret;
152  if (info.device_scale_factor() == 2.0f) {
153    ret.assign(kUIScalesFor2x, kUIScalesFor2x + arraysize(kUIScalesFor2x));
154    return ret;
155  }
156  switch (info.bounds_in_pixel().width()) {
157    case 1280:
158      ret.assign(kUIScalesFor1280,
159                 kUIScalesFor1280 + arraysize(kUIScalesFor1280));
160      break;
161    case 1366:
162      ret.assign(kUIScalesFor1366,
163                 kUIScalesFor1366 + arraysize(kUIScalesFor1366));
164      break;
165    default:
166      ret.assign(kUIScalesFor1280,
167                 kUIScalesFor1280 + arraysize(kUIScalesFor1280));
168#if defined(OS_CHROMEOS)
169      if (base::chromeos::IsRunningOnChromeOS())
170        NOTREACHED() << "Unknown resolution:" << info.ToString();
171#endif
172  }
173  return ret;
174}
175
176// static
177float DisplayManager::GetNextUIScale(const DisplayInfo& info, bool up) {
178  float scale = info.ui_scale();
179  std::vector<float> scales = GetScalesForDisplay(info);
180  for (size_t i = 0; i < scales.size(); ++i) {
181    if (ScaleComparator(scales[i])(scale)) {
182      if (up && i != scales.size() - 1)
183        return scales[i + 1];
184      if (!up && i != 0)
185        return scales[i - 1];
186      return scales[i];
187    }
188  }
189  // Fallback to 1.0f if the |scale| wasn't in the list.
190  return 1.0f;
191}
192
193void DisplayManager::InitFromCommandLine() {
194  DisplayInfoList info_list;
195
196  const string size_str = CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
197      switches::kAshHostWindowBounds);
198  vector<string> parts;
199  base::SplitString(size_str, ',', &parts);
200  for (vector<string>::const_iterator iter = parts.begin();
201       iter != parts.end(); ++iter) {
202    info_list.push_back(DisplayInfo::CreateFromSpec(*iter));
203  }
204  CommandLine* command_line = CommandLine::ForCurrentProcess();
205  if (command_line->HasSwitch(switches::kAshUseFirstDisplayAsInternal))
206    gfx::Display::SetInternalDisplayId(info_list[0].id());
207  OnNativeDisplaysChanged(info_list);
208}
209
210void DisplayManager::UpdateDisplayBoundsForLayout(
211    const DisplayLayout& layout,
212    const gfx::Display& primary_display,
213    gfx::Display* secondary_display) {
214  DCHECK_EQ("0,0", primary_display.bounds().origin().ToString());
215
216  const gfx::Rect& primary_bounds = primary_display.bounds();
217  const gfx::Rect& secondary_bounds = secondary_display->bounds();
218  gfx::Point new_secondary_origin = primary_bounds.origin();
219
220  DisplayLayout::Position position = layout.position;
221
222  // Ignore the offset in case the secondary display doesn't share edges with
223  // the primary display.
224  int offset = layout.offset;
225  if (position == DisplayLayout::TOP || position == DisplayLayout::BOTTOM) {
226    offset = std::min(
227        offset, primary_bounds.width() - kMinimumOverlapForInvalidOffset);
228    offset = std::max(
229        offset, -secondary_bounds.width() + kMinimumOverlapForInvalidOffset);
230  } else {
231    offset = std::min(
232        offset, primary_bounds.height() - kMinimumOverlapForInvalidOffset);
233    offset = std::max(
234        offset, -secondary_bounds.height() + kMinimumOverlapForInvalidOffset);
235  }
236  switch (position) {
237    case DisplayLayout::TOP:
238      new_secondary_origin.Offset(offset, -secondary_bounds.height());
239      break;
240    case DisplayLayout::RIGHT:
241      new_secondary_origin.Offset(primary_bounds.width(), offset);
242      break;
243    case DisplayLayout::BOTTOM:
244      new_secondary_origin.Offset(offset, primary_bounds.height());
245      break;
246    case DisplayLayout::LEFT:
247      new_secondary_origin.Offset(-secondary_bounds.width(), offset);
248      break;
249  }
250  gfx::Insets insets = secondary_display->GetWorkAreaInsets();
251  secondary_display->set_bounds(
252      gfx::Rect(new_secondary_origin, secondary_bounds.size()));
253  secondary_display->UpdateWorkAreaFromInsets(insets);
254}
255
256bool DisplayManager::IsActiveDisplay(const gfx::Display& display) const {
257  for (DisplayList::const_iterator iter = displays_.begin();
258       iter != displays_.end(); ++iter) {
259    if ((*iter).id() == display.id())
260      return true;
261  }
262  return false;
263}
264
265bool DisplayManager::HasInternalDisplay() const {
266  return gfx::Display::InternalDisplayId() != gfx::Display::kInvalidDisplayID;
267}
268
269bool DisplayManager::IsInternalDisplayId(int64 id) const {
270  return gfx::Display::InternalDisplayId() == id;
271}
272
273const gfx::Display& DisplayManager::GetDisplayForId(int64 id) const {
274  return const_cast<DisplayManager*>(this)->FindDisplayForId(id);
275}
276
277const gfx::Display& DisplayManager::FindDisplayContainingPoint(
278    const gfx::Point& point_in_screen) const {
279  for (DisplayList::const_iterator iter = displays_.begin();
280       iter != displays_.end(); ++iter) {
281    const gfx::Display& display = *iter;
282    if (display.bounds().Contains(point_in_screen))
283      return display;
284  }
285  return GetInvalidDisplay();
286}
287
288void DisplayManager::SetOverscanInsets(int64 display_id,
289                                       const gfx::Insets& insets_in_dip) {
290  display_info_[display_id].SetOverscanInsets(insets_in_dip);
291  DisplayInfoList display_info_list;
292  for (DisplayList::const_iterator iter = displays_.begin();
293       iter != displays_.end(); ++iter) {
294    display_info_list.push_back(GetDisplayInfo(iter->id()));
295  }
296  AddMirrorDisplayInfoIfAny(&display_info_list);
297  UpdateDisplays(display_info_list);
298}
299
300void DisplayManager::SetDisplayRotation(int64 display_id,
301                                        gfx::Display::Rotation rotation) {
302  if (!IsDisplayRotationEnabled())
303    return;
304  DisplayInfoList display_info_list;
305  for (DisplayList::const_iterator iter = displays_.begin();
306       iter != displays_.end(); ++iter) {
307    DisplayInfo info = GetDisplayInfo(iter->id());
308    if (info.id() == display_id) {
309      if (info.rotation() == rotation)
310        return;
311      info.set_rotation(rotation);
312    }
313    display_info_list.push_back(info);
314  }
315  AddMirrorDisplayInfoIfAny(&display_info_list);
316  UpdateDisplays(display_info_list);
317}
318
319void DisplayManager::SetDisplayUIScale(int64 display_id,
320                                       float ui_scale) {
321  if (!IsDisplayUIScalingEnabled() ||
322      gfx::Display::InternalDisplayId() != display_id) {
323    return;
324  }
325
326  DisplayInfoList display_info_list;
327  for (DisplayList::const_iterator iter = displays_.begin();
328       iter != displays_.end(); ++iter) {
329    DisplayInfo info = GetDisplayInfo(iter->id());
330    if (info.id() == display_id) {
331      if (info.ui_scale() == ui_scale)
332        return;
333      std::vector<float> scales = GetScalesForDisplay(info);
334      ScaleComparator comparator(ui_scale);
335      if (std::find_if(scales.begin(), scales.end(), comparator) ==
336          scales.end()) {
337        return;
338      }
339      info.set_ui_scale(ui_scale);
340    }
341    display_info_list.push_back(info);
342  }
343  AddMirrorDisplayInfoIfAny(&display_info_list);
344  UpdateDisplays(display_info_list);
345}
346
347void DisplayManager::RegisterDisplayProperty(
348    int64 display_id,
349    gfx::Display::Rotation rotation,
350    float ui_scale,
351    const gfx::Insets* overscan_insets) {
352  if (display_info_.find(display_id) == display_info_.end()) {
353    display_info_[display_id] =
354        DisplayInfo(display_id, std::string(""), false);
355  }
356
357  display_info_[display_id].set_rotation(rotation);
358  // Just in case the preference file was corrupted.
359  if (0.5f <= ui_scale && ui_scale <= 2.0f)
360    display_info_[display_id].set_ui_scale(ui_scale);
361  if (overscan_insets)
362    display_info_[display_id].SetOverscanInsets(*overscan_insets);
363}
364
365bool DisplayManager::IsDisplayRotationEnabled() const {
366  static bool enabled = !CommandLine::ForCurrentProcess()->
367      HasSwitch(switches::kAshDisableDisplayRotation);
368  return enabled;
369}
370
371bool DisplayManager::IsDisplayUIScalingEnabled() const {
372  static bool enabled = !CommandLine::ForCurrentProcess()->
373      HasSwitch(switches::kAshDisableUIScaling);
374  if (!enabled)
375    return false;
376  return GetDisplayIdForUIScaling() != gfx::Display::kInvalidDisplayID;
377}
378
379gfx::Insets DisplayManager::GetOverscanInsets(int64 display_id) const {
380  std::map<int64, DisplayInfo>::const_iterator it =
381      display_info_.find(display_id);
382  return (it != display_info_.end()) ?
383      it->second.overscan_insets_in_dip() : gfx::Insets();
384}
385
386void DisplayManager::OnNativeDisplaysChanged(
387    const std::vector<DisplayInfo>& updated_displays) {
388  if (updated_displays.empty()) {
389    // If the device is booted without display, or chrome is started
390    // without --ash-host-window-bounds on linux desktop, use the
391    // default display.
392    if (displays_.empty()) {
393      std::vector<DisplayInfo> init_displays;
394      init_displays.push_back(DisplayInfo::CreateFromSpec(std::string()));
395      OnNativeDisplaysChanged(init_displays);
396    } else {
397      // Otherwise don't update the displays when all displays are disconnected.
398      // This happens when:
399      // - the device is idle and powerd requested to turn off all displays.
400      // - the device is suspended. (kernel turns off all displays)
401      // - the internal display's brightness is set to 0 and no external
402      //   display is connected.
403      // - the internal display's brightness is 0 and external display is
404      //   disconnected.
405      // The display will be updated when one of displays is turned on, and the
406      // display list will be updated correctly.
407    }
408    return;
409  }
410  first_display_id_ = updated_displays[0].id();
411  std::set<gfx::Point> origins;
412
413  if (updated_displays.size() == 1) {
414    VLOG(1) << "OnNativeDisplaysChanged(1):" << updated_displays[0].ToString();
415  } else {
416    VLOG(1) << "OnNativeDisplaysChanged(" << updated_displays.size()
417            << ") [0]=" << updated_displays[0].ToString()
418            << ", [1]=" << updated_displays[1].ToString();
419  }
420
421  bool internal_display_connected = false;
422  num_connected_displays_ = updated_displays.size();
423  mirrored_display_ = gfx::Display();
424  DisplayInfoList new_display_info_list;
425  for (DisplayInfoList::const_iterator iter = updated_displays.begin();
426       iter != updated_displays.end();
427       ++iter) {
428    if (!internal_display_connected)
429      internal_display_connected = IsInternalDisplayId(iter->id());
430    // Mirrored monitors have the same origins.
431    gfx::Point origin = iter->bounds_in_pixel().origin();
432    if (origins.find(origin) != origins.end()) {
433      InsertAndUpdateDisplayInfo(*iter);
434      mirrored_display_ = CreateDisplayFromDisplayInfoById(iter->id());
435    } else {
436      origins.insert(origin);
437      new_display_info_list.push_back(*iter);
438    }
439  }
440  if (HasInternalDisplay() &&
441      !internal_display_connected &&
442      display_info_.find(gfx::Display::InternalDisplayId()) ==
443      display_info_.end()) {
444    DisplayInfo internal_display_info(
445        gfx::Display::InternalDisplayId(),
446        l10n_util::GetStringUTF8(IDS_ASH_INTERNAL_DISPLAY_NAME),
447        false  /*Internal display must not have overscan */);
448    internal_display_info.SetBounds(gfx::Rect(0, 0, 800, 600));
449    display_info_[gfx::Display::InternalDisplayId()] = internal_display_info;
450  }
451  UpdateDisplays(new_display_info_list);
452}
453
454void DisplayManager::UpdateDisplays() {
455  DisplayInfoList display_info_list;
456  for (DisplayList::const_iterator iter = displays_.begin();
457       iter != displays_.end(); ++iter) {
458    display_info_list.push_back(GetDisplayInfo(iter->id()));
459  }
460  AddMirrorDisplayInfoIfAny(&display_info_list);
461  UpdateDisplays(display_info_list);
462}
463
464void DisplayManager::UpdateDisplays(
465    const std::vector<DisplayInfo>& updated_display_info_list) {
466#if defined(OS_WIN)
467  if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
468    DCHECK_EQ(1u, updated_display_info_list.size()) <<
469        "Multiple display test does not work on Win8 bots. Please "
470        "skip (don't disable) the test using SupportsMultipleDisplays()";
471  }
472#endif
473
474  DisplayInfoList new_display_info_list = updated_display_info_list;
475  std::sort(displays_.begin(), displays_.end(), DisplaySortFunctor());
476  std::sort(new_display_info_list.begin(),
477            new_display_info_list.end(),
478            DisplayInfoSortFunctor());
479  DisplayList removed_displays;
480  std::vector<size_t> changed_display_indices;
481  std::vector<size_t> added_display_indices;
482
483  DisplayList::iterator curr_iter = displays_.begin();
484  DisplayInfoList::const_iterator new_info_iter = new_display_info_list.begin();
485
486  DisplayList new_displays;
487
488  scoped_ptr<MirrorWindowCreator> mirror_window_creater;
489
490  // Use the internal display or 1st as the mirror source, then scale
491  // the root window so that it matches the external display's
492  // resolution. This is necessary in order for scaling to work while
493  // mirrored.
494  int64 mirrored_display_id = gfx::Display::kInvalidDisplayID;
495  if (software_mirroring_enabled_ && new_display_info_list.size() == 2)
496    mirrored_display_id = new_display_info_list[1].id();
497
498  while (curr_iter != displays_.end() ||
499         new_info_iter != new_display_info_list.end()) {
500    if (new_info_iter != new_display_info_list.end() &&
501        mirrored_display_id == new_info_iter->id()) {
502      DisplayInfo info = *new_info_iter;
503      info.SetOverscanInsets(gfx::Insets());
504      InsertAndUpdateDisplayInfo(info);
505
506      mirrored_display_ = CreateDisplayFromDisplayInfoById(new_info_iter->id());
507      mirror_window_creater.reset(new MirrorWindowCreator(
508          delegate_, display_info_[new_info_iter->id()]));
509      ++new_info_iter;
510      // Remove existing external dispaly if it is going to be mirrored.
511      if (curr_iter != displays_.end() &&
512          curr_iter->id() == mirrored_display_id) {
513        removed_displays.push_back(*curr_iter);
514        ++curr_iter;
515      }
516      continue;
517    }
518
519    if (curr_iter == displays_.end()) {
520      // more displays in new list.
521      added_display_indices.push_back(new_displays.size());
522      InsertAndUpdateDisplayInfo(*new_info_iter);
523      new_displays.push_back(
524          CreateDisplayFromDisplayInfoById(new_info_iter->id()));
525      ++new_info_iter;
526    } else if (new_info_iter == new_display_info_list.end()) {
527      // more displays in current list.
528      removed_displays.push_back(*curr_iter);
529      ++curr_iter;
530    } else if (curr_iter->id() == new_info_iter->id()) {
531      const gfx::Display& current_display = *curr_iter;
532      // Copy the info because |CreateDisplayFromInfo| updates the instance.
533      const DisplayInfo current_display_info =
534          GetDisplayInfo(current_display.id());
535      InsertAndUpdateDisplayInfo(*new_info_iter);
536      gfx::Display new_display =
537          CreateDisplayFromDisplayInfoById(new_info_iter->id());
538      const DisplayInfo& new_display_info = GetDisplayInfo(new_display.id());
539
540      bool host_window_bounds_changed =
541          current_display_info.bounds_in_pixel() !=
542          new_display_info.bounds_in_pixel();
543
544      if (force_bounds_changed_ ||
545          host_window_bounds_changed ||
546          (current_display.device_scale_factor() !=
547           new_display.device_scale_factor()) ||
548          (current_display_info.size_in_pixel() !=
549           new_display.GetSizeInPixel()) ||
550          (current_display.rotation() != new_display.rotation())) {
551
552        changed_display_indices.push_back(new_displays.size());
553      }
554
555      new_display.UpdateWorkAreaFromInsets(current_display.GetWorkAreaInsets());
556      new_displays.push_back(new_display);
557      ++curr_iter;
558      ++new_info_iter;
559    } else if (curr_iter->id() < new_info_iter->id()) {
560      // more displays in current list between ids, which means it is deleted.
561      removed_displays.push_back(*curr_iter);
562      ++curr_iter;
563    } else {
564      // more displays in new list between ids, which means it is added.
565      added_display_indices.push_back(new_displays.size());
566      InsertAndUpdateDisplayInfo(*new_info_iter);
567      new_displays.push_back(
568          CreateDisplayFromDisplayInfoById(new_info_iter->id()));
569      ++new_info_iter;
570    }
571  }
572
573  scoped_ptr<MirrorWindowCloser> mirror_window_closer;
574  // Try to close mirror window unless mirror window is necessary.
575  if (!mirror_window_creater.get())
576    mirror_window_closer.reset(new MirrorWindowCloser(delegate_));
577
578  // Do not update |displays_| if there's nothing to be updated. Without this,
579  // it will not update the display layout, which causes the bug
580  // http://crbug.com/155948.
581  if (changed_display_indices.empty() && added_display_indices.empty() &&
582      removed_displays.empty()) {
583    return;
584  }
585  if (delegate_)
586    delegate_->PreDisplayConfigurationChange();
587
588  size_t updated_index;
589  if (UpdateSecondaryDisplayBoundsForLayout(&new_displays, &updated_index) &&
590      std::find(added_display_indices.begin(),
591                added_display_indices.end(),
592                updated_index) == added_display_indices.end() &&
593      std::find(changed_display_indices.begin(),
594                changed_display_indices.end(),
595                updated_index) == changed_display_indices.end()) {
596    changed_display_indices.push_back(updated_index);
597  }
598
599  displays_ = new_displays;
600
601  base::AutoReset<bool> resetter(&change_display_upon_host_resize_, false);
602
603  // Temporarily add displays to be removed because display object
604  // being removed are accessed during shutting down the root.
605  displays_.insert(displays_.end(), removed_displays.begin(),
606                   removed_displays.end());
607
608  for (DisplayList::const_reverse_iterator iter = removed_displays.rbegin();
609       iter != removed_displays.rend(); ++iter) {
610    Shell::GetInstance()->screen()->NotifyDisplayRemoved(displays_.back());
611    displays_.pop_back();
612  }
613  // Close the mirror window here to avoid creating two compositor on
614  // one display.
615  mirror_window_closer.reset();
616  for (std::vector<size_t>::iterator iter = added_display_indices.begin();
617       iter != added_display_indices.end(); ++iter) {
618    Shell::GetInstance()->screen()->NotifyDisplayAdded(displays_[*iter]);
619  }
620  // Create the mirror window after all displays are added so that
621  // it can mirror the display newly added. This can happen when switching
622  // from dock mode to software mirror mode.
623  mirror_window_creater.reset();
624  for (std::vector<size_t>::iterator iter = changed_display_indices.begin();
625       iter != changed_display_indices.end(); ++iter) {
626    Shell::GetInstance()->screen()->NotifyBoundsChanged(displays_[*iter]);
627  }
628  if (delegate_)
629    delegate_->PostDisplayConfigurationChange();
630
631#if defined(USE_X11) && defined(OS_CHROMEOS)
632  if (!changed_display_indices.empty() && base::chromeos::IsRunningOnChromeOS())
633    ui::ClearX11DefaultRootWindow();
634#endif
635}
636
637gfx::Display* DisplayManager::GetDisplayAt(size_t index) {
638  return index < displays_.size() ? &displays_[index] : NULL;
639}
640
641const gfx::Display* DisplayManager::GetPrimaryDisplayCandidate() const {
642  const gfx::Display* primary_candidate = &displays_[0];
643#if defined(OS_CHROMEOS)
644  if (base::chromeos::IsRunningOnChromeOS()) {
645    // On ChromeOS device, root windows are stacked vertically, and
646    // default primary is the one on top.
647    int count = GetNumDisplays();
648    int y = GetDisplayInfo(primary_candidate->id()).bounds_in_pixel().y();
649    for (int i = 1; i < count; ++i) {
650      const gfx::Display* display = &displays_[i];
651      const DisplayInfo& display_info = GetDisplayInfo(display->id());
652      if (display->IsInternal()) {
653        primary_candidate = display;
654        break;
655      } else if (display_info.bounds_in_pixel().y() < y) {
656        primary_candidate = display;
657        y = display_info.bounds_in_pixel().y();
658      }
659    }
660  }
661#endif
662  return primary_candidate;
663}
664
665size_t DisplayManager::GetNumDisplays() const {
666  return displays_.size();
667}
668
669bool DisplayManager::IsMirrored() const {
670  return mirrored_display_.id() != gfx::Display::kInvalidDisplayID;
671}
672
673const DisplayInfo& DisplayManager::GetDisplayInfo(int64 display_id) const {
674  std::map<int64, DisplayInfo>::const_iterator iter =
675      display_info_.find(display_id);
676  CHECK(iter != display_info_.end()) << display_id;
677  return iter->second;
678}
679
680std::string DisplayManager::GetDisplayNameForId(int64 id) {
681  if (id == gfx::Display::kInvalidDisplayID)
682    return l10n_util::GetStringUTF8(IDS_ASH_STATUS_TRAY_UNKNOWN_DISPLAY_NAME);
683
684  std::map<int64, DisplayInfo>::const_iterator iter = display_info_.find(id);
685  if (iter != display_info_.end() && !iter->second.name().empty())
686    return iter->second.name();
687
688  return base::StringPrintf("Display %d", static_cast<int>(id));
689}
690
691int64 DisplayManager::GetDisplayIdForUIScaling() const {
692  // UI Scaling is effective only on internal display.
693  int64 display_id = gfx::Display::InternalDisplayId();
694#if defined(OS_WIN)
695  display_id = first_display_id();
696#endif
697  return display_id;
698}
699
700void DisplayManager::SetMirrorMode(bool mirrored) {
701  if (num_connected_displays() <= 1)
702    return;
703
704#if defined(OS_CHROMEOS)
705  if (base::chromeos::IsRunningOnChromeOS()) {
706    chromeos::OutputState new_state = mirrored ?
707        chromeos::STATE_DUAL_MIRROR : chromeos::STATE_DUAL_EXTENDED;
708    Shell::GetInstance()->output_configurator()->SetDisplayMode(new_state);
709    return;
710  }
711#endif
712  SetSoftwareMirroring(mirrored);
713  DisplayInfoList display_info_list;
714  int count = 0;
715  for (std::map<int64, DisplayInfo>::const_iterator iter =
716           display_info_.begin();
717       count < 2; ++iter, ++count) {
718    display_info_list.push_back(GetDisplayInfo(iter->second.id()));
719  }
720  UpdateDisplays(display_info_list);
721#if defined(OS_CHROMEOS)
722  if (Shell::GetInstance()->output_configurator_animation()) {
723    Shell::GetInstance()->output_configurator_animation()->
724        StartFadeInAnimation();
725  }
726#endif
727}
728
729void DisplayManager::AddRemoveDisplay() {
730  DCHECK(!displays_.empty());
731  std::vector<DisplayInfo> new_display_info_list;
732  DisplayInfo first_display = GetDisplayInfo(displays_[0].id());
733  new_display_info_list.push_back(first_display);
734  // Add if there is only one display connected.
735  if (num_connected_displays() == 1) {
736    // Layout the 2nd display below the primary as with the real device.
737    gfx::Rect host_bounds = first_display.bounds_in_pixel();
738    new_display_info_list.push_back(DisplayInfo::CreateFromSpec(
739        base::StringPrintf(
740            "%d+%d-500x400", host_bounds.x(), host_bounds.bottom())));
741  }
742  num_connected_displays_ = new_display_info_list.size();
743  mirrored_display_ = gfx::Display();
744  UpdateDisplays(new_display_info_list);
745}
746
747void DisplayManager::ToggleDisplayScaleFactor() {
748  DCHECK(!displays_.empty());
749  std::vector<DisplayInfo> new_display_info_list;
750  for (DisplayList::const_iterator iter = displays_.begin();
751       iter != displays_.end(); ++iter) {
752    DisplayInfo display_info = GetDisplayInfo(iter->id());
753    display_info.set_device_scale_factor(
754        display_info.device_scale_factor() == 1.0f ? 2.0f : 1.0f);
755    new_display_info_list.push_back(display_info);
756  }
757  AddMirrorDisplayInfoIfAny(&new_display_info_list);
758  UpdateDisplays(new_display_info_list);
759}
760
761void DisplayManager::SetSoftwareMirroring(bool enabled) {
762  software_mirroring_enabled_ = enabled;
763  mirrored_display_ = gfx::Display();
764}
765
766gfx::Display& DisplayManager::FindDisplayForId(int64 id) {
767  for (DisplayList::iterator iter = displays_.begin();
768       iter != displays_.end(); ++iter) {
769    if ((*iter).id() == id)
770      return *iter;
771  }
772  DLOG(WARNING) << "Could not find display:" << id;
773  return GetInvalidDisplay();
774}
775
776bool DisplayManager::UpdateDisplayBounds(int64 display_id,
777                                         const gfx::Rect& new_bounds) {
778  if (change_display_upon_host_resize_) {
779    display_info_[display_id].SetBounds(new_bounds);
780    // Don't notify observers if the mirrored window has changed.
781    if (software_mirroring_enabled_ && mirrored_display_.id() == display_id)
782      return false;
783    gfx::Display& display = FindDisplayForId(display_id);
784    display.SetSize(display_info_[display_id].size_in_pixel());
785    Shell::GetInstance()->screen()->NotifyBoundsChanged(display);
786    return true;
787  }
788  return false;
789}
790
791void DisplayManager::AddMirrorDisplayInfoIfAny(
792    std::vector<DisplayInfo>* display_info_list) {
793  if (software_mirroring_enabled_ && mirrored_display_.is_valid())
794    display_info_list->push_back(GetDisplayInfo(mirrored_display_.id()));
795}
796
797void DisplayManager::InsertAndUpdateDisplayInfo(const DisplayInfo& new_info) {
798  std::map<int64, DisplayInfo>::iterator info =
799      display_info_.find(new_info.id());
800  if (info != display_info_.end())
801    info->second.Copy(new_info);
802  else {
803    display_info_[new_info.id()] = new_info;
804    display_info_[new_info.id()].set_native(false);
805  }
806  display_info_[new_info.id()].UpdateDisplaySize();
807}
808
809gfx::Display DisplayManager::CreateDisplayFromDisplayInfoById(int64 id) {
810  DCHECK(display_info_.find(id) != display_info_.end());
811  const DisplayInfo& display_info = display_info_[id];
812
813  gfx::Display new_display(display_info.id());
814  gfx::Rect bounds_in_pixel(display_info.size_in_pixel());
815
816  // Simply set the origin to (0,0).  The primary display's origin is
817  // always (0,0) and the secondary display's bounds will be updated
818  // in |UpdateSecondaryDisplayBoundsForLayout| called in |UpdateDisplay|.
819  new_display.SetScaleAndBounds(
820      display_info.device_scale_factor(), gfx::Rect(bounds_in_pixel.size()));
821  new_display.set_rotation(display_info.rotation());
822  return new_display;
823}
824
825bool DisplayManager::UpdateSecondaryDisplayBoundsForLayout(
826    DisplayList* displays,
827    size_t* updated_index) const {
828  if (displays->size() != 2U)
829    return false;
830
831  int64 id_at_zero = displays->at(0).id();
832  DisplayIdPair pair =
833      (id_at_zero == first_display_id_ ||
834       id_at_zero == gfx::Display::InternalDisplayId()) ?
835      std::make_pair(id_at_zero, displays->at(1).id()) :
836      std::make_pair(displays->at(1).id(), id_at_zero) ;
837  DisplayLayout layout =
838      layout_store_->ComputeDisplayLayoutForDisplayIdPair(pair);
839
840  // Ignore if a user has a old format (should be extremely rare)
841  // and this will be replaced with DCHECK.
842  if (layout.primary_id != gfx::Display::kInvalidDisplayID) {
843    size_t primary_index, secondary_index;
844    if (displays->at(0).id() == layout.primary_id) {
845      primary_index = 0;
846      secondary_index = 1;
847    } else {
848      primary_index = 1;
849      secondary_index = 0;
850    }
851    gfx::Rect bounds =
852        GetDisplayForId(displays->at(secondary_index).id()).bounds();
853    UpdateDisplayBoundsForLayout(
854        layout, displays->at(primary_index), &displays->at(secondary_index));
855    *updated_index = secondary_index;
856    return bounds != displays->at(secondary_index).bounds();
857  }
858  return false;
859}
860
861}  // namespace internal
862}  // namespace ash
863