display_controller.cc revision 3551c9c881056c480085172ff9840cab31610854 
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_controller.h"
6
7#include <algorithm>
8#include <cmath>
9#include <map>
10
11#include "ash/ash_switches.h"
12#include "ash/display/display_layout_store.h"
13#include "ash/display/display_manager.h"
14#include "ash/display/mirror_window_controller.h"
15#include "ash/display/root_window_transformers.h"
16#include "ash/host/root_window_host_factory.h"
17#include "ash/root_window_controller.h"
18#include "ash/screen_ash.h"
19#include "ash/shell.h"
20#include "ash/wm/coordinate_conversion.h"
21#include "ash/wm/property_util.h"
22#include "ash/wm/window_properties.h"
23#include "ash/wm/window_util.h"
24#include "base/command_line.h"
25#include "base/strings/stringprintf.h"
26#include "third_party/skia/include/utils/SkMatrix44.h"
27#include "ui/aura/client/activation_client.h"
28#include "ui/aura/client/capture_client.h"
29#include "ui/aura/client/cursor_client.h"
30#include "ui/aura/client/focus_client.h"
31#include "ui/aura/client/screen_position_client.h"
32#include "ui/aura/root_window.h"
33#include "ui/aura/root_window_transformer.h"
34#include "ui/aura/window.h"
35#include "ui/aura/window_property.h"
36#include "ui/aura/window_tracker.h"
37#include "ui/compositor/compositor.h"
38#include "ui/compositor/dip_util.h"
39#include "ui/gfx/display.h"
40#include "ui/gfx/screen.h"
41
42#if defined(OS_CHROMEOS)
43#include "base/chromeos/chromeos_version.h"
44#include "base/time/time.h"
45#if defined(USE_X11)
46#include "ash/display/output_configurator_animation.h"
47#include "chromeos/display/output_configurator.h"
48#include "ui/base/x/x11_util.h"
49
50// Including this at the bottom to avoid other
51// potential conflict with chrome headers.
52#include <X11/extensions/Xrandr.h>
53#undef RootWindow
54#endif  // defined(USE_X11)
55#endif  // defined(OS_CHROMEOS)
56
57DECLARE_WINDOW_PROPERTY_TYPE(int64);
58
59namespace ash {
60namespace {
61
62// Primary display stored in global object as it can be
63// accessed after Shell is deleted. A separate display instance is created
64// during the shutdown instead of always keeping two display instances
65// (one here and another one in display_manager) in sync, which is error prone.
66int64 primary_display_id = gfx::Display::kInvalidDisplayID;
67gfx::Display* primary_display_for_shutdown = NULL;
68// Keeps the number of displays during the shutdown after
69// ash::Shell:: is deleted.
70int num_displays_for_shutdown = -1;
71
72// Specifies how long the display change should have been disabled
73// after each display change operations.
74// |kCycleDisplayThrottleTimeoutMs| is set to be longer to avoid
75// changing the settings while the system is still configurating
76// displays. It will be overriden by |kAfterDisplayChangeThrottleTimeoutMs|
77// when the display change happens, so the actual timeout is much shorter.
78const int64 kAfterDisplayChangeThrottleTimeoutMs = 500;
79const int64 kCycleDisplayThrottleTimeoutMs = 4000;
80const int64 kSwapDisplayThrottleTimeoutMs = 500;
81
82internal::DisplayManager* GetDisplayManager() {
83  return Shell::GetInstance()->display_manager();
84}
85
86void SetDisplayPropertiesOnHostWindow(aura::RootWindow* root,
87                                      const gfx::Display& display) {
88  internal::DisplayInfo info =
89      GetDisplayManager()->GetDisplayInfo(display.id());
90#if defined(OS_CHROMEOS) && defined(USE_X11)
91  // Native window property (Atom in X11) that specifies the display's
92  // rotation, scale factor and if it's internal display.  They are
93  // read and used by touchpad/mouse driver directly on X (contact
94  // adlr@ for more details on touchpad/mouse driver side). The value
95  // of the rotation is one of 0 (normal), 1 (90 degrees clockwise), 2
96  // (180 degree) or 3 (270 degrees clockwise).  The value of the
97  // scale factor is in percent (100, 140, 200 etc).
98  const char kRotationProp[] = "_CHROME_DISPLAY_ROTATION";
99  const char kScaleFactorProp[] = "_CHROME_DISPLAY_SCALE_FACTOR";
100  const char kInternalProp[] = "_CHROME_DISPLAY_INTERNAL";
101  const char kCARDINAL[] = "CARDINAL";
102  int xrandr_rotation = RR_Rotate_0;
103  switch (info.rotation()) {
104    case gfx::Display::ROTATE_0:
105      xrandr_rotation = RR_Rotate_0;
106      break;
107    case gfx::Display::ROTATE_90:
108      xrandr_rotation = RR_Rotate_90;
109      break;
110    case gfx::Display::ROTATE_180:
111      xrandr_rotation = RR_Rotate_180;
112      break;
113    case gfx::Display::ROTATE_270:
114      xrandr_rotation = RR_Rotate_270;
115      break;
116  }
117
118  int internal = display.IsInternal() ? 1 : 0;
119  gfx::AcceleratedWidget xwindow = root->GetAcceleratedWidget();
120  ui::SetIntProperty(xwindow, kInternalProp, kCARDINAL, internal);
121  ui::SetIntProperty(xwindow, kRotationProp, kCARDINAL, xrandr_rotation);
122  ui::SetIntProperty(xwindow,
123                     kScaleFactorProp,
124                     kCARDINAL,
125                     100 * display.device_scale_factor());
126#endif
127  scoped_ptr<aura::RootWindowTransformer> transformer(
128      internal::CreateRootWindowTransformerForDisplay(root, display));
129  root->SetRootWindowTransformer(transformer.Pass());
130}
131
132}  // namespace
133
134namespace internal {
135
136DEFINE_WINDOW_PROPERTY_KEY(int64, kDisplayIdKey,
137                           gfx::Display::kInvalidDisplayID);
138
139// A utility class to store/restore focused/active window
140// when the display configuration has changed.
141class FocusActivationStore {
142 public:
143  FocusActivationStore()
144      : activation_client_(NULL),
145        capture_client_(NULL),
146        focus_client_(NULL),
147        focused_(NULL),
148        active_(NULL) {
149  }
150
151  void Store() {
152    if (!activation_client_) {
153      aura::RootWindow* root = Shell::GetPrimaryRootWindow();
154      activation_client_ = aura::client::GetActivationClient(root);
155      capture_client_ = aura::client::GetCaptureClient(root);
156      focus_client_ = aura::client::GetFocusClient(root);
157    }
158    focused_ = focus_client_->GetFocusedWindow();
159    if (focused_)
160      tracker_.Add(focused_);
161    active_ = activation_client_->GetActiveWindow();
162    if (active_ && focused_ != active_)
163      tracker_.Add(active_);
164
165    // Deactivate the window to close menu / bubble windows.
166    activation_client_->DeactivateWindow(active_);
167    // Release capture if any.
168    capture_client_->SetCapture(NULL);
169    // Clear the focused window if any. This is necessary because a
170    // window may be deleted when losing focus (fullscreen flash for
171    // example).  If the focused window is still alive after move, it'll
172    // be re-focused below.
173    focus_client_->FocusWindow(NULL);
174  }
175
176  void Restore() {
177    // Restore focused or active window if it's still alive.
178    if (focused_ && tracker_.Contains(focused_)) {
179      focus_client_->FocusWindow(focused_);
180    } else if (active_ && tracker_.Contains(active_)) {
181      activation_client_->ActivateWindow(active_);
182    }
183    if (focused_)
184      tracker_.Remove(focused_);
185    if (active_)
186      tracker_.Remove(active_);
187    focused_ = NULL;
188    active_ = NULL;
189  }
190
191 private:
192  aura::client::ActivationClient* activation_client_;
193  aura::client::CaptureClient* capture_client_;
194  aura::client::FocusClient* focus_client_;
195  aura::WindowTracker tracker_;
196  aura::Window* focused_;
197  aura::Window* active_;
198
199  DISALLOW_COPY_AND_ASSIGN(FocusActivationStore);
200};
201
202}  // namespace internal
203
204////////////////////////////////////////////////////////////////////////////////
205// DisplayChangeLimiter
206
207DisplayController::DisplayChangeLimiter::DisplayChangeLimiter()
208    : throttle_timeout_(base::Time::Now()) {
209}
210
211void DisplayController::DisplayChangeLimiter::SetThrottleTimeout(
212    int64 throttle_ms) {
213  throttle_timeout_ =
214      base::Time::Now() + base::TimeDelta::FromMilliseconds(throttle_ms);
215}
216
217bool DisplayController::DisplayChangeLimiter::IsThrottled() const {
218  return base::Time::Now() < throttle_timeout_;
219}
220
221////////////////////////////////////////////////////////////////////////////////
222// DisplayController
223
224DisplayController::DisplayController()
225    : primary_root_window_for_replace_(NULL),
226      focus_activation_store_(new internal::FocusActivationStore()),
227      mirror_window_controller_(new internal::MirrorWindowController) {
228  CommandLine* command_line = CommandLine::ForCurrentProcess();
229#if defined(OS_CHROMEOS)
230  if (!command_line->HasSwitch(switches::kAshDisableDisplayChangeLimiter) &&
231      base::chromeos::IsRunningOnChromeOS())
232    limiter_.reset(new DisplayChangeLimiter);
233#endif
234  // Reset primary display to make sure that tests don't use
235  // stale display info from previous tests.
236  primary_display_id = gfx::Display::kInvalidDisplayID;
237  delete primary_display_for_shutdown;
238  primary_display_for_shutdown = NULL;
239  num_displays_for_shutdown = -1;
240}
241
242DisplayController::~DisplayController() {
243  DCHECK(primary_display_for_shutdown);
244}
245
246void DisplayController::Start() {
247  Shell::GetScreen()->AddObserver(this);
248  Shell::GetInstance()->display_manager()->set_delegate(this);
249}
250
251void DisplayController::Shutdown() {
252  // Unset the display manager's delegate here because
253  // DisplayManager outlives DisplayController.
254  Shell::GetInstance()->display_manager()->set_delegate(NULL);
255
256  mirror_window_controller_.reset();
257
258  DCHECK(!primary_display_for_shutdown);
259  primary_display_for_shutdown = new gfx::Display(
260      GetDisplayManager()->GetDisplayForId(primary_display_id));
261  num_displays_for_shutdown = GetDisplayManager()->GetNumDisplays();
262
263  Shell::GetScreen()->RemoveObserver(this);
264  // Delete all root window controllers, which deletes root window
265  // from the last so that the primary root window gets deleted last.
266  for (std::map<int64, aura::RootWindow*>::const_reverse_iterator it =
267           root_windows_.rbegin(); it != root_windows_.rend(); ++it) {
268    internal::RootWindowController* controller =
269        GetRootWindowController(it->second);
270    DCHECK(controller);
271    delete controller;
272  }
273}
274
275// static
276const gfx::Display& DisplayController::GetPrimaryDisplay() {
277  DCHECK_NE(primary_display_id, gfx::Display::kInvalidDisplayID);
278  if (primary_display_for_shutdown)
279    return *primary_display_for_shutdown;
280  return GetDisplayManager()->GetDisplayForId(primary_display_id);
281}
282
283// static
284int DisplayController::GetNumDisplays() {
285  if (num_displays_for_shutdown >= 0)
286    return num_displays_for_shutdown;
287  return GetDisplayManager()->GetNumDisplays();
288}
289
290void DisplayController::InitPrimaryDisplay() {
291  const gfx::Display& primary_candidate =
292      GetDisplayManager()->GetPrimaryDisplayCandidate();
293  primary_display_id = primary_candidate.id();
294  AddRootWindowForDisplay(primary_candidate);
295}
296
297void DisplayController::InitSecondaryDisplays() {
298  internal::DisplayManager* display_manager = GetDisplayManager();
299  for (size_t i = 0; i < display_manager->GetNumDisplays(); ++i) {
300    const gfx::Display& display = display_manager->GetDisplayAt(i);
301    if (primary_display_id != display.id()) {
302      aura::RootWindow* root = AddRootWindowForDisplay(display);
303      Shell::GetInstance()->InitRootWindowForSecondaryDisplay(root);
304    }
305  }
306  UpdateHostWindowNames();
307}
308
309void DisplayController::AddObserver(Observer* observer) {
310  observers_.AddObserver(observer);
311}
312
313void DisplayController::RemoveObserver(Observer* observer) {
314  observers_.RemoveObserver(observer);
315}
316
317aura::RootWindow* DisplayController::GetPrimaryRootWindow() {
318  DCHECK(!root_windows_.empty());
319  return root_windows_[primary_display_id];
320}
321
322aura::RootWindow* DisplayController::GetRootWindowForDisplayId(int64 id) {
323  return root_windows_[id];
324}
325
326void DisplayController::CloseChildWindows() {
327  for (std::map<int64, aura::RootWindow*>::const_iterator it =
328           root_windows_.begin(); it != root_windows_.end(); ++it) {
329    aura::RootWindow* root_window = it->second;
330    internal::RootWindowController* controller =
331        GetRootWindowController(root_window);
332    if (controller) {
333      controller->CloseChildWindows();
334    } else {
335      while (!root_window->children().empty()) {
336        aura::Window* child = root_window->children()[0];
337        delete child;
338      }
339    }
340  }
341}
342
343std::vector<aura::RootWindow*> DisplayController::GetAllRootWindows() {
344  std::vector<aura::RootWindow*> windows;
345  for (std::map<int64, aura::RootWindow*>::const_iterator it =
346           root_windows_.begin(); it != root_windows_.end(); ++it) {
347    DCHECK(it->second);
348    if (GetRootWindowController(it->second))
349      windows.push_back(it->second);
350  }
351  return windows;
352}
353
354gfx::Insets DisplayController::GetOverscanInsets(int64 display_id) const {
355  return GetDisplayManager()->GetOverscanInsets(display_id);
356}
357
358void DisplayController::SetOverscanInsets(int64 display_id,
359                                          const gfx::Insets& insets_in_dip) {
360  GetDisplayManager()->SetOverscanInsets(display_id, insets_in_dip);
361}
362
363std::vector<internal::RootWindowController*>
364DisplayController::GetAllRootWindowControllers() {
365  std::vector<internal::RootWindowController*> controllers;
366  for (std::map<int64, aura::RootWindow*>::const_iterator it =
367           root_windows_.begin(); it != root_windows_.end(); ++it) {
368    internal::RootWindowController* controller =
369        GetRootWindowController(it->second);
370    if (controller)
371      controllers.push_back(controller);
372  }
373  return controllers;
374}
375
376void DisplayController::SetLayoutForCurrentDisplays(
377    const DisplayLayout& layout_relative_to_primary) {
378  DCHECK_EQ(2U, GetDisplayManager()->GetNumDisplays());
379  if (GetDisplayManager()->GetNumDisplays() < 2)
380    return;
381  const gfx::Display& primary = GetPrimaryDisplay();
382  const DisplayIdPair pair = GetDisplayManager()->GetCurrentDisplayIdPair();
383  // Invert if the primary was swapped.
384  DisplayLayout to_set = pair.first == primary.id() ?
385      layout_relative_to_primary : layout_relative_to_primary.Invert();
386
387  internal::DisplayLayoutStore* layout_store =
388      GetDisplayManager()->layout_store();
389  DisplayLayout current_layout =
390      layout_store->GetRegisteredDisplayLayout(pair);
391  if (to_set.position != current_layout.position ||
392      to_set.offset != current_layout.offset) {
393    to_set.primary_id = primary.id();
394    layout_store->RegisterLayoutForDisplayIdPair(
395        pair.first, pair.second, to_set);
396    PreDisplayConfigurationChange();
397    // TODO(oshima): Call UpdateDisplays instead.
398    UpdateDisplayBoundsForLayout();
399    // Primary's bounds stay the same. Just notify bounds change
400    // on the secondary.
401    Shell::GetInstance()->screen()->NotifyBoundsChanged(
402        ScreenAsh::GetSecondaryDisplay());
403    PostDisplayConfigurationChange();
404  }
405}
406
407void DisplayController::ToggleMirrorMode() {
408  internal::DisplayManager* display_manager = GetDisplayManager();
409  if (display_manager->num_connected_displays() <= 1)
410    return;
411
412  if (limiter_) {
413    if  (limiter_->IsThrottled())
414      return;
415    limiter_->SetThrottleTimeout(kCycleDisplayThrottleTimeoutMs);
416  }
417#if defined(OS_CHROMEOS) && defined(USE_X11)
418  Shell* shell = Shell::GetInstance();
419  internal::OutputConfiguratorAnimation* animation =
420      shell->output_configurator_animation();
421  animation->StartFadeOutAnimation(base::Bind(
422      base::IgnoreResult(&internal::DisplayManager::SetMirrorMode),
423      base::Unretained(display_manager),
424      !display_manager->IsMirrored()));
425#endif
426}
427
428void DisplayController::SwapPrimaryDisplay() {
429  if (limiter_) {
430    if  (limiter_->IsThrottled())
431      return;
432    limiter_->SetThrottleTimeout(kSwapDisplayThrottleTimeoutMs);
433  }
434
435  if (Shell::GetScreen()->GetNumDisplays() > 1) {
436#if defined(OS_CHROMEOS) && defined(USE_X11)
437    internal::OutputConfiguratorAnimation* animation =
438        Shell::GetInstance()->output_configurator_animation();
439    if (animation) {
440      animation->StartFadeOutAnimation(base::Bind(
441          &DisplayController::OnFadeOutForSwapDisplayFinished,
442          base::Unretained(this)));
443    } else {
444      SetPrimaryDisplay(ScreenAsh::GetSecondaryDisplay());
445    }
446#else
447    SetPrimaryDisplay(ScreenAsh::GetSecondaryDisplay());
448#endif
449  }
450}
451
452void DisplayController::SetPrimaryDisplayId(int64 id) {
453  DCHECK_NE(gfx::Display::kInvalidDisplayID, id);
454  if (id == gfx::Display::kInvalidDisplayID || primary_display_id == id)
455    return;
456
457  const gfx::Display& display = GetDisplayManager()->GetDisplayForId(id);
458  if (display.is_valid())
459    SetPrimaryDisplay(display);
460}
461
462void DisplayController::SetPrimaryDisplay(
463    const gfx::Display& new_primary_display) {
464  internal::DisplayManager* display_manager = GetDisplayManager();
465  DCHECK(new_primary_display.is_valid());
466  DCHECK(display_manager->IsActiveDisplay(new_primary_display));
467
468  if (!new_primary_display.is_valid() ||
469      !display_manager->IsActiveDisplay(new_primary_display)) {
470    LOG(ERROR) << "Invalid or non-existent display is requested:"
471               << new_primary_display.ToString();
472    return;
473  }
474
475  if (primary_display_id == new_primary_display.id() ||
476      root_windows_.size() < 2) {
477    return;
478  }
479
480  aura::RootWindow* non_primary_root = root_windows_[new_primary_display.id()];
481  LOG_IF(ERROR, !non_primary_root)
482      << "Unknown display is requested in SetPrimaryDisplay: id="
483      << new_primary_display.id();
484  if (!non_primary_root)
485    return;
486
487  gfx::Display old_primary_display = GetPrimaryDisplay();
488
489  // Swap root windows between current and new primary display.
490  aura::RootWindow* primary_root = root_windows_[primary_display_id];
491  DCHECK(primary_root);
492  DCHECK_NE(primary_root, non_primary_root);
493
494  root_windows_[new_primary_display.id()] = primary_root;
495  primary_root->SetProperty(internal::kDisplayIdKey, new_primary_display.id());
496
497  root_windows_[old_primary_display.id()] = non_primary_root;
498  non_primary_root->SetProperty(internal::kDisplayIdKey,
499                                old_primary_display.id());
500
501  primary_display_id = new_primary_display.id();
502  GetDisplayManager()->layout_store()->UpdatePrimaryDisplayId(
503      display_manager->GetCurrentDisplayIdPair(), primary_display_id);
504
505  UpdateWorkAreaOfDisplayNearestWindow(
506      primary_root, old_primary_display.GetWorkAreaInsets());
507  UpdateWorkAreaOfDisplayNearestWindow(
508      non_primary_root, new_primary_display.GetWorkAreaInsets());
509
510  // Update the dispay manager with new display info.
511  std::vector<internal::DisplayInfo> display_info_list;
512  display_info_list.push_back(display_manager->GetDisplayInfo(
513      primary_display_id));
514  display_info_list.push_back(display_manager->GetDisplayInfo(
515      ScreenAsh::GetSecondaryDisplay().id()));
516  GetDisplayManager()->set_force_bounds_changed(true);
517  GetDisplayManager()->UpdateDisplays(display_info_list);
518  GetDisplayManager()->set_force_bounds_changed(false);
519}
520
521void DisplayController::EnsurePointerInDisplays() {
522  // If the mouse is currently on a display in native location,
523  // use the same native location. Otherwise find the display closest
524  // to the current cursor location in screen coordinates.
525
526  gfx::Point point_in_screen = Shell::GetScreen()->GetCursorScreenPoint();
527  gfx::Point target_location_in_native;
528  int64 closest_distance_squared = -1;
529  internal::DisplayManager* display_manager = GetDisplayManager();
530
531  aura::RootWindow* dst_root_window = NULL;
532  for (size_t i = 0; i < display_manager->GetNumDisplays(); ++i) {
533    const gfx::Display& display = display_manager->GetDisplayAt(i);
534    const internal::DisplayInfo display_info =
535        display_manager->GetDisplayInfo(display.id());
536    aura::RootWindow* root_window = GetRootWindowForDisplayId(display.id());
537    if (display_info.bounds_in_pixel().Contains(
538            cursor_location_in_native_coords_for_restore_)) {
539      dst_root_window = root_window;
540      target_location_in_native = cursor_location_in_native_coords_for_restore_;
541      break;
542    }
543    gfx::Point center = display.bounds().CenterPoint();
544    // Use the distance squared from the center of the dislay. This is not
545    // exactly "closest" display, but good enough to pick one
546    // appropriate (and there are at most two displays).
547    // We don't care about actual distance, only relative to other displays, so
548    // using the LengthSquared() is cheaper than Length().
549
550    int64 distance_squared = (center - point_in_screen).LengthSquared();
551    if (closest_distance_squared < 0 ||
552        closest_distance_squared > distance_squared) {
553      aura::RootWindow* root_window = GetRootWindowForDisplayId(display.id());
554      aura::client::ScreenPositionClient* client =
555          aura::client::GetScreenPositionClient(root_window);
556      client->ConvertPointFromScreen(root_window, &center);
557      root_window->ConvertPointToNativeScreen(&center);
558      dst_root_window = root_window;
559      target_location_in_native = center;
560      closest_distance_squared = distance_squared;
561    }
562  }
563  dst_root_window->ConvertPointFromNativeScreen(&target_location_in_native);
564  dst_root_window->MoveCursorTo(target_location_in_native);
565}
566
567bool DisplayController::UpdateWorkAreaOfDisplayNearestWindow(
568    const aura::Window* window,
569    const gfx::Insets& insets) {
570  const aura::RootWindow* root_window = window->GetRootWindow();
571  int64 id = root_window->GetProperty(internal::kDisplayIdKey);
572  // if id is |kInvaildDisplayID|, it's being deleted.
573  DCHECK(id != gfx::Display::kInvalidDisplayID);
574  return GetDisplayManager()->UpdateWorkAreaOfDisplay(id, insets);
575}
576
577const gfx::Display& DisplayController::GetDisplayNearestWindow(
578    const aura::Window* window) const {
579  if (!window)
580    return GetPrimaryDisplay();
581  const aura::RootWindow* root_window = window->GetRootWindow();
582  if (!root_window)
583    return GetPrimaryDisplay();
584  int64 id = root_window->GetProperty(internal::kDisplayIdKey);
585  // if id is |kInvaildDisplayID|, it's being deleted.
586  DCHECK(id != gfx::Display::kInvalidDisplayID);
587
588  internal::DisplayManager* display_manager = GetDisplayManager();
589  // RootWindow needs Display to determine its device scale factor.
590  // TODO(oshima): We don't need full display info for mirror
591  // window. Refactor so that RootWindow doesn't use it.
592  if (display_manager->mirrored_display().id() == id)
593    return display_manager->mirrored_display();
594
595  return display_manager->GetDisplayForId(id);
596}
597
598const gfx::Display& DisplayController::GetDisplayNearestPoint(
599    const gfx::Point& point) const {
600  // Fallback to the primary display if there is no root display containing
601  // the |point|.
602  const gfx::Display& display =
603      GetDisplayManager()->FindDisplayContainingPoint(point);
604  return display.is_valid() ? display : GetPrimaryDisplay();
605}
606
607const gfx::Display& DisplayController::GetDisplayMatching(
608    const gfx::Rect& rect) const {
609  if (rect.IsEmpty())
610    return GetDisplayNearestPoint(rect.origin());
611
612  int max_area = 0;
613  const gfx::Display* matching = NULL;
614  for (size_t i = 0; i < GetDisplayManager()->GetNumDisplays(); ++i) {
615    const gfx::Display& display = GetDisplayManager()->GetDisplayAt(i);
616    gfx::Rect intersect = gfx::IntersectRects(display.bounds(), rect);
617    int area = intersect.width() * intersect.height();
618    if (area > max_area) {
619      max_area = area;
620      matching = &display;
621    }
622  }
623  // Fallback to the primary display if there is no matching display.
624  return matching ? *matching : GetPrimaryDisplay();
625}
626
627void DisplayController::OnDisplayBoundsChanged(const gfx::Display& display) {
628  const internal::DisplayInfo& display_info =
629      GetDisplayManager()->GetDisplayInfo(display.id());
630  DCHECK(!display_info.bounds_in_pixel().IsEmpty());
631  aura::RootWindow* root = root_windows_[display.id()];
632  root->SetHostBounds(display_info.bounds_in_pixel());
633  SetDisplayPropertiesOnHostWindow(root, display);
634}
635
636void DisplayController::OnDisplayAdded(const gfx::Display& display) {
637  if (primary_root_window_for_replace_) {
638    DCHECK(root_windows_.empty());
639    primary_display_id = display.id();
640    root_windows_[display.id()] = primary_root_window_for_replace_;
641    primary_root_window_for_replace_->SetProperty(
642        internal::kDisplayIdKey, display.id());
643    primary_root_window_for_replace_ = NULL;
644    const internal::DisplayInfo& display_info =
645        GetDisplayManager()->GetDisplayInfo(display.id());
646    root_windows_[display.id()]->SetHostBounds(
647        display_info.bounds_in_pixel());
648  } else {
649    if (primary_display_id == gfx::Display::kInvalidDisplayID)
650      primary_display_id = display.id();
651    DCHECK(!root_windows_.empty());
652    aura::RootWindow* root = AddRootWindowForDisplay(display);
653    Shell::GetInstance()->InitRootWindowForSecondaryDisplay(root);
654  }
655}
656
657void DisplayController::OnDisplayRemoved(const gfx::Display& display) {
658  aura::RootWindow* root_to_delete = root_windows_[display.id()];
659  DCHECK(root_to_delete) << display.ToString();
660
661  // Display for root window will be deleted when the Primary RootWindow
662  // is deleted by the Shell.
663  root_windows_.erase(display.id());
664
665  // When the primary root window's display is removed, move the primary
666  // root to the other display.
667  if (primary_display_id == display.id()) {
668    // Temporarily store the primary root window in
669    // |primary_root_window_for_replace_| when replacing the display.
670    if (root_windows_.size() == 0) {
671      primary_display_id = gfx::Display::kInvalidDisplayID;
672      primary_root_window_for_replace_ = root_to_delete;
673      return;
674    }
675    DCHECK_EQ(1U, root_windows_.size());
676    primary_display_id = ScreenAsh::GetSecondaryDisplay().id();
677    aura::RootWindow* primary_root = root_to_delete;
678
679    // Delete the other root instead.
680    root_to_delete = root_windows_[primary_display_id];
681    root_to_delete->SetProperty(internal::kDisplayIdKey, display.id());
682
683    // Setup primary root.
684    root_windows_[primary_display_id] = primary_root;
685    primary_root->SetProperty(internal::kDisplayIdKey, primary_display_id);
686
687    OnDisplayBoundsChanged(
688        GetDisplayManager()->GetDisplayForId(primary_display_id));
689  }
690  internal::RootWindowController* controller =
691      GetRootWindowController(root_to_delete);
692  DCHECK(controller);
693  controller->MoveWindowsTo(GetPrimaryRootWindow());
694  // Delete most of root window related objects, but don't delete
695  // root window itself yet because the stack may be using it.
696  controller->Shutdown();
697  base::MessageLoop::current()->DeleteSoon(FROM_HERE, controller);
698}
699
700void DisplayController::OnRootWindowHostResized(const aura::RootWindow* root) {
701  internal::DisplayManager* display_manager = GetDisplayManager();
702  gfx::Display display = GetDisplayNearestWindow(root);
703  if (display_manager->UpdateDisplayBounds(
704          display.id(),
705          gfx::Rect(root->GetHostOrigin(), root->GetHostSize()))) {
706    mirror_window_controller_->UpdateWindow();
707  }
708}
709
710void DisplayController::CreateOrUpdateMirrorWindow(
711    const internal::DisplayInfo& info) {
712  mirror_window_controller_->UpdateWindow(info);
713}
714
715void DisplayController::CloseMirrorWindow() {
716  mirror_window_controller_->Close();
717}
718
719void DisplayController::PreDisplayConfigurationChange() {
720  FOR_EACH_OBSERVER(Observer, observers_, OnDisplayConfigurationChanging());
721  focus_activation_store_->Store();
722
723  gfx::Point point_in_screen = Shell::GetScreen()->GetCursorScreenPoint();
724  gfx::Display display =
725      Shell::GetScreen()->GetDisplayNearestPoint(point_in_screen);
726  aura::RootWindow* root_window = GetRootWindowForDisplayId(display.id());
727
728  aura::client::ScreenPositionClient* client =
729      aura::client::GetScreenPositionClient(root_window);
730  client->ConvertPointFromScreen(root_window, &point_in_screen);
731  root_window->ConvertPointToNativeScreen(&point_in_screen);
732  cursor_location_in_native_coords_for_restore_ = point_in_screen;
733}
734
735void DisplayController::PostDisplayConfigurationChange() {
736  if (limiter_)
737    limiter_->SetThrottleTimeout(kAfterDisplayChangeThrottleTimeoutMs);
738
739  focus_activation_store_->Restore();
740
741  internal::DisplayManager* display_manager = GetDisplayManager();
742  internal::DisplayLayoutStore* layout_store = display_manager->layout_store();
743  if (display_manager->num_connected_displays() > 1) {
744    DisplayIdPair pair = display_manager->GetCurrentDisplayIdPair();
745    layout_store->UpdateMirrorStatus(pair, display_manager->IsMirrored());
746    DisplayLayout layout = layout_store->GetRegisteredDisplayLayout(pair);
747
748    if (Shell::GetScreen()->GetNumDisplays() > 1 ) {
749      int64 primary_id = layout.primary_id;
750      SetPrimaryDisplayId(
751          primary_id == gfx::Display::kInvalidDisplayID ?
752          pair.first : primary_id);
753      // Update the primary_id in case the above call is
754      // ignored. Happens when a) default layout's primary id
755      // doesn't exist, or b) the primary_id has already been
756      // set to the same and didn't update it.
757      layout_store->UpdatePrimaryDisplayId(pair, GetPrimaryDisplay().id());
758    }
759  }
760  FOR_EACH_OBSERVER(Observer, observers_, OnDisplayConfigurationChanged());
761  UpdateHostWindowNames();
762  EnsurePointerInDisplays();
763}
764
765aura::RootWindow* DisplayController::AddRootWindowForDisplay(
766    const gfx::Display& display) {
767  static int root_window_count = 0;
768  const internal::DisplayInfo& display_info =
769      GetDisplayManager()->GetDisplayInfo(display.id());
770  const gfx::Rect& bounds_in_pixel = display_info.bounds_in_pixel();
771  aura::RootWindow::CreateParams params(bounds_in_pixel);
772  params.host = Shell::GetInstance()->root_window_host_factory()->
773      CreateRootWindowHost(bounds_in_pixel);
774  aura::RootWindow* root_window = new aura::RootWindow(params);
775  root_window->SetName(
776      base::StringPrintf("RootWindow-%d", root_window_count++));
777  root_window->compositor()->SetBackgroundColor(SK_ColorBLACK);
778  // No need to remove RootWindowObserver because
779  // the DisplayController object outlives RootWindow objects.
780  root_window->AddRootWindowObserver(this);
781  root_window->SetProperty(internal::kDisplayIdKey, display.id());
782  root_window->Init();
783
784  root_windows_[display.id()] = root_window;
785  SetDisplayPropertiesOnHostWindow(root_window, display);
786
787#if defined(OS_CHROMEOS)
788  static bool force_constrain_pointer_to_root =
789      CommandLine::ForCurrentProcess()->HasSwitch(
790          switches::kAshConstrainPointerToRoot);
791  if (base::chromeos::IsRunningOnChromeOS() || force_constrain_pointer_to_root)
792    root_window->ConfineCursorToWindow();
793#endif
794  return root_window;
795}
796
797void DisplayController::UpdateDisplayBoundsForLayout() {
798  internal::DisplayManager* display_manager = GetDisplayManager();
799  if (Shell::GetScreen()->GetNumDisplays() < 2 ||
800      display_manager->num_connected_displays() < 2) {
801    return;
802  }
803  DCHECK_EQ(2, Shell::GetScreen()->GetNumDisplays());
804
805  const DisplayLayout layout = display_manager->GetCurrentDisplayLayout();
806  display_manager->UpdateDisplayBoundsForLayoutById(
807      layout, GetPrimaryDisplay(),
808      ScreenAsh::GetSecondaryDisplay().id());
809}
810
811void DisplayController::OnFadeOutForSwapDisplayFinished() {
812#if defined(OS_CHROMEOS) && defined(USE_X11)
813  SetPrimaryDisplay(ScreenAsh::GetSecondaryDisplay());
814  Shell::GetInstance()->output_configurator_animation()->StartFadeInAnimation();
815#endif
816}
817
818void DisplayController::UpdateHostWindowNames() {
819#if defined(USE_X11)
820  // crbug.com/120229 - set the window title for the primary dislpay
821  // to "aura_root_0" so gtalk can find the primary root window to broadcast.
822  // TODO(jhorwich) Remove this once Chrome supports window-based broadcasting.
823  aura::RootWindow* primary = Shell::GetPrimaryRootWindow();
824  Shell::RootWindowList root_windows = Shell::GetAllRootWindows();
825  for (size_t i = 0; i < root_windows.size(); ++i) {
826    std::string name =
827        root_windows[i] == primary ? "aura_root_0" : "aura_root_x";
828    gfx::AcceleratedWidget xwindow = root_windows[i]->GetAcceleratedWidget();
829    XStoreName(ui::GetXDisplay(), xwindow, name.c_str());
830  }
831#endif
832}
833
834}  // namespace ash
835