ash/wm/window_state.cc

   1 // Copyright 2013 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/wm/window_state.h"
   6
   7 #include "ash/ash_switches.h"
   8 #include "ash/root_window_controller.h"
   9 #include "ash/screen_util.h"
  10 #include "ash/shell_window_ids.h"
  11 #include "ash/wm/default_state.h"
  12 #include "ash/wm/window_animations.h"
  13 #include "ash/wm/window_properties.h"
  14 #include "ash/wm/window_state_delegate.h"
  15 #include "ash/wm/window_state_observer.h"
  16 #include "ash/wm/window_util.h"
  17 #include "ash/wm/wm_event.h"
  18 #include "base/auto_reset.h"
  19 #include "base/command_line.h"
  20 #include "ui/aura/client/aura_constants.h"
  21 #include "ui/aura/layout_manager.h"
  22 #include "ui/aura/window.h"
  23 #include "ui/aura/window_delegate.h"
  24 #include "ui/compositor/layer_tree_owner.h"
  25 #include "ui/compositor/scoped_layer_animation_settings.h"
  26 #include "ui/gfx/display.h"
  27 #include "ui/gfx/screen.h"
  28 #include "ui/wm/core/window_util.h"
  29
  30 namespace ash {
  31 namespace wm {
  32
  33 namespace {
  34
  35 // A tentative class to set the bounds on the window.
  36 // TODO(oshima): Once all logic is cleaned up, move this to the real layout
  37 // manager with proper friendship.
  38 class BoundsSetter : public aura::LayoutManager {
  39  public:
  40   BoundsSetter() {}
  41   ~BoundsSetter() override {}
  42
  43   // aura::LayoutManager overrides:
  44   void OnWindowResized() override {}
  45   void OnWindowAddedToLayout(aura::Window* child) override {}
  46   void OnWillRemoveWindowFromLayout(aura::Window* child) override {}
  47   void OnWindowRemovedFromLayout(aura::Window* child) override {}
  48   void OnChildWindowVisibilityChanged(aura::Window* child,
  49                                       bool visible) override {}
  50   void SetChildBounds(aura::Window* child,
  51                       const gfx::Rect& requested_bounds) override {}
  52
  53   void SetBounds(aura::Window* window, const gfx::Rect& bounds) {
  54     SetChildBoundsDirect(window, bounds);
  55   }
  56
  57  private:
  58   DISALLOW_COPY_AND_ASSIGN(BoundsSetter);
  59 };
  60
  61 WMEventType WMEventTypeFromShowState(ui::WindowShowState requested_show_state) {
  62   switch (requested_show_state) {
  63     case ui::SHOW_STATE_DEFAULT:
  64     case ui::SHOW_STATE_NORMAL:
  65       return WM_EVENT_NORMAL;
  66     case ui::SHOW_STATE_MINIMIZED:
  67       return WM_EVENT_MINIMIZE;
  68     case ui::SHOW_STATE_MAXIMIZED:
  69       return WM_EVENT_MAXIMIZE;
  70     case ui::SHOW_STATE_FULLSCREEN:
  71       return WM_EVENT_FULLSCREEN;
  72     case ui::SHOW_STATE_INACTIVE:
  73       return WM_EVENT_SHOW_INACTIVE;
  74     case ui::SHOW_STATE_END:
  75       NOTREACHED() << "No WMEvent defined for the show state:"
  76                    << requested_show_state;
  77   }
  78   return WM_EVENT_NORMAL;
  79 }
  80
  81 }  // namespace
  82
  83 WindowState::~WindowState() {
  84   // WindowState is registered as an owned property of |window_|, and window
  85   // unregisters all of its observers in its d'tor before destroying its
  86   // properties. As a result, window_->RemoveObserver() doesn't need to (and
  87   // shouldn't) be called here.
  88 }
  89
  90 bool WindowState::HasDelegate() const {
  91   return delegate_;
  92 }
  93
  94 void WindowState::SetDelegate(scoped_ptr<WindowStateDelegate> delegate) {
  95   DCHECK(!delegate_.get());
  96   delegate_ = delegate.Pass();
  97 }
  98
  99 WindowStateType WindowState::GetStateType() const {
 100   return current_state_->GetType();
 101 }
 102
 103 bool WindowState::IsMinimized() const {
 104   return GetStateType() == WINDOW_STATE_TYPE_MINIMIZED ||
 105          GetStateType() == WINDOW_STATE_TYPE_DOCKED_MINIMIZED;
 106 }
 107
 108 bool WindowState::IsMaximized() const {
 109   return GetStateType() == WINDOW_STATE_TYPE_MAXIMIZED;
 110 }
 111
 112 bool WindowState::IsFullscreen() const {
 113   return GetStateType() == WINDOW_STATE_TYPE_FULLSCREEN;
 114 }
 115
 116 bool WindowState::IsMaximizedOrFullscreen() const {
 117   return GetStateType() == WINDOW_STATE_TYPE_FULLSCREEN ||
 118       GetStateType() == WINDOW_STATE_TYPE_MAXIMIZED;
 119 }
 120
 121 bool WindowState::IsSnapped() const {
 122   return GetStateType() == WINDOW_STATE_TYPE_LEFT_SNAPPED ||
 123       GetStateType() == WINDOW_STATE_TYPE_RIGHT_SNAPPED;
 124 }
 125
 126 bool WindowState::IsNormalStateType() const {
 127   return GetStateType() == WINDOW_STATE_TYPE_NORMAL ||
 128       GetStateType() == WINDOW_STATE_TYPE_DEFAULT;
 129 }
 130
 131 bool WindowState::IsNormalOrSnapped() const {
 132   return IsNormalStateType() || IsSnapped();
 133 }
 134
 135 bool WindowState::IsActive() const {
 136   return IsActiveWindow(window_);
 137 }
 138
 139 bool WindowState::IsDocked() const {
 140   return GetStateType() == WINDOW_STATE_TYPE_DOCKED ||
 141          GetStateType() == WINDOW_STATE_TYPE_DOCKED_MINIMIZED;
 142 }
 143
 144 bool WindowState::CanMaximize() const {
 145   // Window must have the kCanMaximizeKey and have no maximum width or height.
 146   if (!window()->GetProperty(aura::client::kCanMaximizeKey))
 147     return false;
 148
 149   if (!window()->delegate())
 150     return true;
 151
 152   gfx::Size max_size = window_->delegate()->GetMaximumSize();
 153   return !max_size.width() && !max_size.height();
 154 }
 155
 156 bool WindowState::CanMinimize() const {
 157   return window()->GetProperty(aura::client::kCanMinimizeKey);
 158 }
 159
 160 bool WindowState::CanResize() const {
 161   return window_->GetProperty(aura::client::kCanResizeKey);
 162 }
 163
 164 bool WindowState::CanActivate() const {
 165   return ::wm::CanActivateWindow(window_);
 166 }
 167
 168 bool WindowState::CanSnap() const {
 169   if (!CanResize() || window_->type() == ui::wm::WINDOW_TYPE_PANEL ||
 170       ::wm::GetTransientParent(window_))
 171     return false;
 172   // If a window cannot be maximized, assume it cannot snap either.
 173   // TODO(oshima): We should probably snap if the maximum size is greater than
 174   // the snapped size.
 175   return CanMaximize();
 176 }
 177
 178 bool WindowState::HasRestoreBounds() const {
 179   return window_->GetProperty(aura::client::kRestoreBoundsKey) != NULL;
 180 }
 181
 182 void WindowState::Maximize() {
 183   window_->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_MAXIMIZED);
 184 }
 185
 186 void WindowState::Minimize() {
 187   window_->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_MINIMIZED);
 188 }
 189
 190 void WindowState::Unminimize() {
 191   window_->SetProperty(
 192       aura::client::kShowStateKey,
 193       window_->GetProperty(aura::client::kRestoreShowStateKey));
 194   window_->ClearProperty(aura::client::kRestoreShowStateKey);
 195 }
 196
 197 void WindowState::Activate() {
 198   ActivateWindow(window_);
 199 }
 200
 201 void WindowState::Deactivate() {
 202   DeactivateWindow(window_);
 203 }
 204
 205 void WindowState::Restore() {
 206   if (!IsNormalStateType()) {
 207     const WMEvent event(WM_EVENT_NORMAL);
 208     OnWMEvent(&event);
 209   }
 210 }
 211
 212 void WindowState::OnWMEvent(const WMEvent* event) {
 213   current_state_->OnWMEvent(this, event);
 214 }
 215
 216 void WindowState::SaveCurrentBoundsForRestore() {
 217   gfx::Rect bounds_in_screen =
 218       ScreenUtil::ConvertRectToScreen(window_->parent(),
 219                                       window_->bounds());
 220   SetRestoreBoundsInScreen(bounds_in_screen);
 221 }
 222
 223 gfx::Rect WindowState::GetRestoreBoundsInScreen() const {
 224   return *window_->GetProperty(aura::client::kRestoreBoundsKey);
 225 }
 226
 227 gfx::Rect WindowState::GetRestoreBoundsInParent() const {
 228   return ScreenUtil::ConvertRectFromScreen(window_->parent(),
 229                                           GetRestoreBoundsInScreen());
 230 }
 231
 232 void WindowState::SetRestoreBoundsInScreen(const gfx::Rect& bounds) {
 233   window_->SetProperty(aura::client::kRestoreBoundsKey, new gfx::Rect(bounds));
 234 }
 235
 236 void WindowState::SetRestoreBoundsInParent(const gfx::Rect& bounds) {
 237   SetRestoreBoundsInScreen(
 238       ScreenUtil::ConvertRectToScreen(window_->parent(), bounds));
 239 }
 240
 241 void WindowState::ClearRestoreBounds() {
 242   window_->ClearProperty(aura::client::kRestoreBoundsKey);
 243 }
 244
 245 scoped_ptr<WindowState::State> WindowState::SetStateObject(
 246     scoped_ptr<WindowState::State> new_state) {
 247   current_state_->DetachState(this);
 248   scoped_ptr<WindowState::State> old_object = current_state_.Pass();
 249   current_state_ = new_state.Pass();
 250   current_state_->AttachState(this, old_object.get());
 251   return old_object.Pass();
 252 }
 253
 254 void WindowState::SetPreAutoManageWindowBounds(
 255     const gfx::Rect& bounds) {
 256   pre_auto_manage_window_bounds_.reset(new gfx::Rect(bounds));
 257 }
 258
 259 void WindowState::AddObserver(WindowStateObserver* observer) {
 260   observer_list_.AddObserver(observer);
 261 }
 262
 263 void WindowState::RemoveObserver(WindowStateObserver* observer) {
 264   observer_list_.RemoveObserver(observer);
 265 }
 266
 267 void WindowState::set_bounds_changed_by_user(bool bounds_changed_by_user) {
 268   bounds_changed_by_user_ = bounds_changed_by_user;
 269   if (bounds_changed_by_user)
 270     pre_auto_manage_window_bounds_.reset();
 271 }
 272
 273 void WindowState::CreateDragDetails(aura::Window* window,
 274                                     const gfx::Point& point_in_parent,
 275                                     int window_component,
 276                                     aura::client::WindowMoveSource source) {
 277   drag_details_.reset(
 278       new DragDetails(window, point_in_parent, window_component, source));
 279 }
 280
 281 void WindowState::DeleteDragDetails() {
 282   drag_details_.reset();
 283 }
 284
 285 void WindowState::SetAndClearRestoreBounds() {
 286   DCHECK(HasRestoreBounds());
 287   SetBoundsInScreen(GetRestoreBoundsInScreen());
 288   ClearRestoreBounds();
 289 }
 290
 291 void WindowState::OnWindowPropertyChanged(aura::Window* window,
 292                                           const void* key,
 293                                           intptr_t old) {
 294   DCHECK_EQ(window, window_);
 295   if (key == aura::client::kShowStateKey && !ignore_property_change_) {
 296     WMEvent event(WMEventTypeFromShowState(GetShowState()));
 297     OnWMEvent(&event);
 298   }
 299 }
 300
 301 WindowState::WindowState(aura::Window* window)
 302     : window_(window),
 303       window_position_managed_(false),
 304       bounds_changed_by_user_(false),
 305       panel_attached_(true),
 306       ignored_by_shelf_(false),
 307       can_consume_system_keys_(false),
 308       top_row_keys_are_function_keys_(false),
 309       unminimize_to_restore_bounds_(false),
 310       in_immersive_fullscreen_(false),
 311       hide_shelf_when_fullscreen_(true),
 312       minimum_visibility_(false),
 313       can_be_dragged_(true),
 314       ignore_property_change_(false),
 315       current_state_(new DefaultState(ToWindowStateType(GetShowState()))) {
 316   window_->AddObserver(this);
 317 }
 318
 319 ui::WindowShowState WindowState::GetShowState() const {
 320   return window_->GetProperty(aura::client::kShowStateKey);
 321 }
 322
 323 void WindowState::SetBoundsInScreen(
 324     const gfx::Rect& bounds_in_screen) {
 325   gfx::Rect bounds_in_parent =
 326       ScreenUtil::ConvertRectFromScreen(window_->parent(),
 327                                        bounds_in_screen);
 328   window_->SetBounds(bounds_in_parent);
 329 }
 330
 331 void WindowState::AdjustSnappedBounds(gfx::Rect* bounds) {
 332   if (is_dragged() || !IsSnapped())
 333     return;
 334   gfx::Rect maximized_bounds = ScreenUtil::GetMaximizedWindowBoundsInParent(
 335       window_);
 336   if (GetStateType() == WINDOW_STATE_TYPE_LEFT_SNAPPED)
 337     bounds->set_x(maximized_bounds.x());
 338   else if (GetStateType() == WINDOW_STATE_TYPE_RIGHT_SNAPPED)
 339     bounds->set_x(maximized_bounds.right() - bounds->width());
 340   bounds->set_y(maximized_bounds.y());
 341   bounds->set_height(maximized_bounds.height());
 342 }
 343
 344 void WindowState::UpdateWindowShowStateFromStateType() {
 345   ui::WindowShowState new_window_state =
 346       ToWindowShowState(current_state_->GetType());
 347   if (new_window_state != GetShowState()) {
 348     base::AutoReset<bool> resetter(&ignore_property_change_, true);
 349     window_->SetProperty(aura::client::kShowStateKey, new_window_state);
 350   }
 351 }
 352
 353 void WindowState::NotifyPreStateTypeChange(
 354     WindowStateType old_window_state_type) {
 355   FOR_EACH_OBSERVER(WindowStateObserver, observer_list_,
 356                     OnPreWindowStateTypeChange(this, old_window_state_type));
 357 }
 358
 359 void WindowState::NotifyPostStateTypeChange(
 360     WindowStateType old_window_state_type) {
 361   FOR_EACH_OBSERVER(WindowStateObserver, observer_list_,
 362                     OnPostWindowStateTypeChange(this, old_window_state_type));
 363 }
 364
 365 void WindowState::SetBoundsDirect(const gfx::Rect& bounds) {
 366   gfx::Rect actual_new_bounds(bounds);
 367   // Ensure we don't go smaller than our minimum bounds in "normal" window
 368   // modes
 369   if (window_->delegate() && !IsMaximized() && !IsFullscreen()) {
 370     // Get the minimum usable size of the minimum size and the screen size.
 371     gfx::Size min_size = window_->delegate()->GetMinimumSize();
 372     min_size.SetToMin(gfx::Screen::GetScreenFor(
 373         window_)->GetDisplayNearestWindow(window_).work_area().size());
 374
 375     actual_new_bounds.set_width(
 376         std::max(min_size.width(), actual_new_bounds.width()));
 377     actual_new_bounds.set_height(
 378         std::max(min_size.height(), actual_new_bounds.height()));
 379   }
 380   BoundsSetter().SetBounds(window_, actual_new_bounds);
 381   SnapWindowToPixelBoundary(window_);
 382 }
 383
 384 void WindowState::SetBoundsConstrained(const gfx::Rect& bounds) {
 385   gfx::Rect work_area_in_parent =
 386       ScreenUtil::GetDisplayWorkAreaBoundsInParent(window_);
 387   gfx::Rect child_bounds(bounds);
 388   AdjustBoundsSmallerThan(work_area_in_parent.size(), &child_bounds);
 389   SetBoundsDirect(child_bounds);
 390 }
 391
 392 void WindowState::SetBoundsDirectAnimated(const gfx::Rect& bounds) {
 393   const int kBoundsChangeSlideDurationMs = 120;
 394
 395   ui::Layer* layer = window_->layer();
 396   ui::ScopedLayerAnimationSettings slide_settings(layer->GetAnimator());
 397   slide_settings.SetPreemptionStrategy(
 398       ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
 399   slide_settings.SetTransitionDuration(
 400       base::TimeDelta::FromMilliseconds(kBoundsChangeSlideDurationMs));
 401   SetBoundsDirect(bounds);
 402 }
 403
 404 void WindowState::SetBoundsDirectCrossFade(const gfx::Rect& new_bounds) {
 405   // Some test results in invoking CrossFadeToBounds when window is not visible.
 406   // No animation is necessary in that case, thus just change the bounds and
 407   // quit.
 408   if (!window_->TargetVisibility()) {
 409     SetBoundsConstrained(new_bounds);
 410     return;
 411   }
 412
 413   const gfx::Rect old_bounds = window_->bounds();
 414
 415   // Create fresh layers for the window and all its children to paint into.
 416   // Takes ownership of the old layer and all its children, which will be
 417   // cleaned up after the animation completes.
 418   // Specify |set_bounds| to true here to keep the old bounds in the child
 419   // windows of |window|.
 420   scoped_ptr<ui::LayerTreeOwner> old_layer_owner =
 421       ::wm::RecreateLayers(window_);
 422   ui::Layer* old_layer = old_layer_owner->root();
 423   DCHECK(old_layer);
 424   ui::Layer* new_layer = window_->layer();
 425
 426   // Resize the window to the new size, which will force a layout and paint.
 427   SetBoundsDirect(new_bounds);
 428
 429   // Ensure the higher-resolution layer is on top.
 430   bool old_on_top = (old_bounds.width() > new_bounds.width());
 431   if (old_on_top)
 432     old_layer->parent()->StackBelow(new_layer, old_layer);
 433   else
 434     old_layer->parent()->StackAbove(new_layer, old_layer);
 435
 436   CrossFadeAnimation(window_, old_layer_owner.Pass(), gfx::Tween::EASE_OUT);
 437 }
 438
 439 WindowState* GetActiveWindowState() {
 440   aura::Window* active = GetActiveWindow();
 441   return active ? GetWindowState(active) : NULL;
 442 }
 443
 444 WindowState* GetWindowState(aura::Window* window) {
 445   if (!window)
 446     return NULL;
 447   WindowState* settings = window->GetProperty(kWindowStateKey);
 448   if(!settings) {
 449     settings = new WindowState(window);
 450     window->SetProperty(kWindowStateKey, settings);
 451   }
 452   return settings;
 453 }
 454
 455 const WindowState* GetWindowState(const aura::Window* window) {
 456   return GetWindowState(const_cast<aura::Window*>(window));
 457 }
 458
 459 }  // namespace wm
 460 }  // namespace ash