ui/aura/window.cc

   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 "ui/aura/window.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/bind.h"
  10 #include "base/bind_helpers.h"
  11 #include "base/callback.h"
  12 #include "base/logging.h"
  13 #include "base/profiler/scoped_tracker.h"
  14 #include "base/strings/string_number_conversions.h"
  15 #include "base/strings/string_util.h"
  16 #include "base/strings/stringprintf.h"
  17 #include "ui/aura/client/capture_client.h"
  18 #include "ui/aura/client/cursor_client.h"
  19 #include "ui/aura/client/event_client.h"
  20 #include "ui/aura/client/focus_client.h"
  21 #include "ui/aura/client/screen_position_client.h"
  22 #include "ui/aura/client/visibility_client.h"
  23 #include "ui/aura/client/window_stacking_client.h"
  24 #include "ui/aura/env.h"
  25 #include "ui/aura/layout_manager.h"
  26 #include "ui/aura/window_delegate.h"
  27 #include "ui/aura/window_event_dispatcher.h"
  28 #include "ui/aura/window_observer.h"
  29 #include "ui/aura/window_tracker.h"
  30 #include "ui/aura/window_tree_host.h"
  31 #include "ui/compositor/compositor.h"
  32 #include "ui/compositor/layer.h"
  33 #include "ui/events/event_target_iterator.h"
  34 #include "ui/gfx/canvas.h"
  35 #include "ui/gfx/path.h"
  36 #include "ui/gfx/scoped_canvas.h"
  37 #include "ui/gfx/screen.h"
  38
  39 namespace aura {
  40
  41 namespace {
  42
  43 // Used when searching for a Window to stack relative to.
  44 template <class T>
  45 T IteratorForDirectionBegin(aura::Window* window);
  46
  47 template <>
  48 Window::Windows::const_iterator IteratorForDirectionBegin(
  49     aura::Window* window) {
  50   return window->children().begin();
  51 }
  52
  53 template <>
  54 Window::Windows::const_reverse_iterator IteratorForDirectionBegin(
  55     aura::Window* window) {
  56   return window->children().rbegin();
  57 }
  58
  59 template <class T>
  60 T IteratorForDirectionEnd(aura::Window* window);
  61
  62 template <>
  63 Window::Windows::const_iterator IteratorForDirectionEnd(aura::Window* window) {
  64   return window->children().end();
  65 }
  66
  67 template <>
  68 Window::Windows::const_reverse_iterator IteratorForDirectionEnd(
  69     aura::Window* window) {
  70   return window->children().rend();
  71 }
  72
  73 // Depth first search for the first Window with a layer to stack relative
  74 // to. Starts at target. Does not descend into |ignore|.
  75 template <class T>
  76 ui::Layer* FindStackingTargetLayerDown(aura::Window* target,
  77                                        aura::Window* ignore) {
  78   if (target == ignore)
  79     return NULL;
  80
  81   if (target->layer())
  82     return target->layer();
  83
  84   for (T i = IteratorForDirectionBegin<T>(target);
  85        i != IteratorForDirectionEnd<T>(target); ++i) {
  86     ui::Layer* layer = FindStackingTargetLayerDown<T>(*i, ignore);
  87     if (layer)
  88       return layer;
  89   }
  90   return NULL;
  91 }
  92
  93 // Depth first search through the siblings of |target||. This does not search
  94 // all the siblings, only those before/after |target| (depening upon the
  95 // template type) and ignoring |ignore|. Returns the Layer of the first Window
  96 // encountered with a Layer.
  97 template <class T>
  98 ui::Layer* FindStackingLayerInSiblings(aura::Window* target,
  99                                        aura::Window* ignore) {
 100   aura::Window* parent = target->parent();
 101   for (T i = std::find(IteratorForDirectionBegin<T>(parent),
 102                   IteratorForDirectionEnd<T>(parent), target);
 103        i != IteratorForDirectionEnd<T>(parent); ++i) {
 104     ui::Layer* layer = FindStackingTargetLayerDown<T>(*i, ignore);
 105     if (layer)
 106       return layer;
 107   }
 108   return NULL;
 109 }
 110
 111 // Returns the first Window that has a Layer. This does a depth first search
 112 // through the descendants of |target| first, then ascends up doing a depth
 113 // first search through siblings of all ancestors until a Layer is found or an
 114 // ancestor with a layer is found. This is intended to locate a layer to stack
 115 // other layers relative to.
 116 template <class T>
 117 ui::Layer* FindStackingTargetLayer(aura::Window* target, aura::Window* ignore) {
 118   ui::Layer* result = FindStackingTargetLayerDown<T>(target, ignore);
 119   if (result)
 120     return result;
 121   while (target->parent()) {
 122     ui::Layer* result = FindStackingLayerInSiblings<T>(target, ignore);
 123     if (result)
 124       return result;
 125     target = target->parent();
 126     if (target->layer())
 127       return NULL;
 128   }
 129   return NULL;
 130 }
 131
 132 // Does a depth first search for all descendants of |child| that have layers.
 133 // This stops at any descendants that have layers (and adds them to |layers|).
 134 void GetLayersToStack(aura::Window* child, std::vector<ui::Layer*>* layers) {
 135   if (child->layer()) {
 136     layers->push_back(child->layer());
 137     return;
 138   }
 139   for (size_t i = 0; i < child->children().size(); ++i)
 140     GetLayersToStack(child->children()[i], layers);
 141 }
 142
 143 }  // namespace
 144
 145 class ScopedCursorHider {
 146  public:
 147   explicit ScopedCursorHider(Window* window)
 148       : window_(window),
 149         hid_cursor_(false) {
 150     if (!window_->IsRootWindow())
 151       return;
 152     const bool cursor_is_in_bounds = window_->GetBoundsInScreen().Contains(
 153         Env::GetInstance()->last_mouse_location());
 154     client::CursorClient* cursor_client = client::GetCursorClient(window_);
 155     if (cursor_is_in_bounds && cursor_client &&
 156         cursor_client->IsCursorVisible()) {
 157       cursor_client->HideCursor();
 158       hid_cursor_ = true;
 159     }
 160   }
 161   ~ScopedCursorHider() {
 162     if (!window_->IsRootWindow())
 163       return;
 164
 165     // Update the device scale factor of the cursor client only when the last
 166     // mouse location is on this root window.
 167     if (hid_cursor_) {
 168       client::CursorClient* cursor_client = client::GetCursorClient(window_);
 169       if (cursor_client) {
 170         const gfx::Display& display =
 171             gfx::Screen::GetScreenFor(window_)->GetDisplayNearestWindow(
 172                 window_);
 173         cursor_client->SetDisplay(display);
 174         cursor_client->ShowCursor();
 175       }
 176     }
 177   }
 178
 179  private:
 180   Window* window_;
 181   bool hid_cursor_;
 182
 183   DISALLOW_COPY_AND_ASSIGN(ScopedCursorHider);
 184 };
 185
 186 Window::Window(WindowDelegate* delegate)
 187     : host_(NULL),
 188       type_(ui::wm::WINDOW_TYPE_UNKNOWN),
 189       owned_by_parent_(true),
 190       delegate_(delegate),
 191       parent_(NULL),
 192       visible_(false),
 193       id_(-1),
 194       transparent_(false),
 195       user_data_(NULL),
 196       ignore_events_(false),
 197       // Don't notify newly added observers during notification. This causes
 198       // problems for code that adds an observer as part of an observer
 199       // notification (such as the workspace code).
 200       observers_(ObserverList<WindowObserver>::NOTIFY_EXISTING_ONLY) {
 201   set_target_handler(delegate_);
 202 }
 203
 204 Window::~Window() {
 205   if (layer()->owner() == this)
 206     layer()->CompleteAllAnimations();
 207   layer()->SuppressPaint();
 208
 209   // Let the delegate know we're in the processing of destroying.
 210   if (delegate_)
 211     delegate_->OnWindowDestroying(this);
 212   FOR_EACH_OBSERVER(WindowObserver, observers_, OnWindowDestroying(this));
 213
 214   // While we are being destroyed, our target handler may also be in the
 215   // process of destruction or already destroyed, so do not forward any
 216   // input events at the ui::EP_TARGET phase.
 217   set_target_handler(nullptr);
 218
 219   // TODO(beng): See comment in window_event_dispatcher.h. This shouldn't be
 220   //             necessary but unfortunately is right now due to ordering
 221   //             peculiarities. WED must be notified _after_ other observers
 222   //             are notified of pending teardown but before the hierarchy
 223   //             is actually torn down.
 224   WindowTreeHost* host = GetHost();
 225   if (host)
 226     host->dispatcher()->OnPostNotifiedWindowDestroying(this);
 227
 228   // The window should have already had its state cleaned up in
 229   // WindowEventDispatcher::OnWindowHidden(), but there have been some crashes
 230   // involving windows being destroyed without being hidden first. See
 231   // crbug.com/342040. This should help us debug the issue. TODO(tdresser):
 232   // remove this once we determine why we have windows that are destroyed
 233   // without being hidden.
 234   bool window_incorrectly_cleaned_up = CleanupGestureState();
 235   CHECK(!window_incorrectly_cleaned_up);
 236
 237   // Then destroy the children.
 238   RemoveOrDestroyChildren();
 239
 240   // The window needs to be removed from the parent before calling the
 241   // WindowDestroyed callbacks of delegate and the observers.
 242   if (parent_)
 243     parent_->RemoveChild(this);
 244
 245   if (delegate_)
 246     delegate_->OnWindowDestroyed(this);
 247   ObserverListBase<WindowObserver>::Iterator iter(&observers_);
 248   for (WindowObserver* observer = iter.GetNext(); observer;
 249        observer = iter.GetNext()) {
 250     RemoveObserver(observer);
 251     observer->OnWindowDestroyed(this);
 252   }
 253
 254   // Clear properties.
 255   for (std::map<const void*, Value>::const_iterator iter = prop_map_.begin();
 256        iter != prop_map_.end();
 257        ++iter) {
 258     if (iter->second.deallocator)
 259       (*iter->second.deallocator)(iter->second.value);
 260   }
 261   prop_map_.clear();
 262
 263   // The layer will either be destroyed by |layer_owner_|'s dtor, or by whoever
 264   // acquired it.
 265   layer()->set_delegate(NULL);
 266   DestroyLayer();
 267 }
 268
 269 void Window::Init(ui::LayerType layer_type) {
 270   SetLayer(new ui::Layer(layer_type));
 271   layer()->SetVisible(false);
 272   layer()->set_delegate(this);
 273   UpdateLayerName();
 274   layer()->SetFillsBoundsOpaquely(!transparent_);
 275   Env::GetInstance()->NotifyWindowInitialized(this);
 276 }
 277
 278 void Window::SetType(ui::wm::WindowType type) {
 279   // Cannot change type after the window is initialized.
 280   DCHECK(!layer());
 281   type_ = type;
 282 }
 283
 284 void Window::SetName(const std::string& name) {
 285   name_ = name;
 286   if (layer())
 287     UpdateLayerName();
 288 }
 289
 290 void Window::SetTitle(const base::string16& title) {
 291   title_ = title;
 292   FOR_EACH_OBSERVER(WindowObserver,
 293                     observers_,
 294                     OnWindowTitleChanged(this));
 295 }
 296
 297 void Window::SetTransparent(bool transparent) {
 298   transparent_ = transparent;
 299   if (layer())
 300     layer()->SetFillsBoundsOpaquely(!transparent_);
 301 }
 302
 303 void Window::SetFillsBoundsCompletely(bool fills_bounds) {
 304   layer()->SetFillsBoundsCompletely(fills_bounds);
 305 }
 306
 307 Window* Window::GetRootWindow() {
 308   return const_cast<Window*>(
 309       static_cast<const Window*>(this)->GetRootWindow());
 310 }
 311
 312 const Window* Window::GetRootWindow() const {
 313   return IsRootWindow() ? this : parent_ ? parent_->GetRootWindow() : NULL;
 314 }
 315
 316 WindowTreeHost* Window::GetHost() {
 317   return const_cast<WindowTreeHost*>(const_cast<const Window*>(this)->
 318       GetHost());
 319 }
 320
 321 const WindowTreeHost* Window::GetHost() const {
 322   const Window* root_window = GetRootWindow();
 323   return root_window ? root_window->host_ : NULL;
 324 }
 325
 326 void Window::Show() {
 327   DCHECK_EQ(visible_, layer()->GetTargetVisibility());
 328   // It is not allowed that a window is visible but the layers alpha is fully
 329   // transparent since the window would still be considered to be active but
 330   // could not be seen.
 331   DCHECK_IMPLIES(visible_, layer()->GetTargetOpacity() > 0.0f);
 332   SetVisible(true);
 333 }
 334
 335 void Window::Hide() {
 336   // RootWindow::OnVisibilityChanged will call ReleaseCapture.
 337   SetVisible(false);
 338 }
 339
 340 bool Window::IsVisible() const {
 341   // Layer visibility can be inconsistent with window visibility, for example
 342   // when a Window is hidden, we want this function to return false immediately
 343   // after, even though the client may decide to animate the hide effect (and
 344   // so the layer will be visible for some time after Hide() is called).
 345   for (const Window* window = this; window; window = window->parent()) {
 346     if (!window->visible_)
 347       return false;
 348     if (window->layer())
 349       return window->layer()->IsDrawn();
 350   }
 351   return false;
 352 }
 353
 354 gfx::Rect Window::GetBoundsInRootWindow() const {
 355   // TODO(beng): There may be a better way to handle this, and the existing code
 356   //             is likely wrong anyway in a multi-display world, but this will
 357   //             do for now.
 358   if (!GetRootWindow())
 359     return bounds();
 360   gfx::Rect bounds_in_root(bounds().size());
 361   ConvertRectToTarget(this, GetRootWindow(), &bounds_in_root);
 362   return bounds_in_root;
 363 }
 364
 365 gfx::Rect Window::GetBoundsInScreen() const {
 366   gfx::Rect bounds(GetBoundsInRootWindow());
 367   const Window* root = GetRootWindow();
 368   if (root) {
 369     aura::client::ScreenPositionClient* screen_position_client =
 370         aura::client::GetScreenPositionClient(root);
 371     if (screen_position_client) {
 372       gfx::Point origin = bounds.origin();
 373       screen_position_client->ConvertPointToScreen(root, &origin);
 374       bounds.set_origin(origin);
 375     }
 376   }
 377   return bounds;
 378 }
 379
 380 void Window::SetTransform(const gfx::Transform& transform) {
 381   if (!layer()) {
 382     // Transforms aren't supported on layerless windows.
 383     NOTREACHED();
 384     return;
 385   }
 386   FOR_EACH_OBSERVER(WindowObserver, observers_,
 387                     OnWindowTransforming(this));
 388   layer()->SetTransform(transform);
 389   FOR_EACH_OBSERVER(WindowObserver, observers_,
 390                     OnWindowTransformed(this));
 391   NotifyAncestorWindowTransformed(this);
 392 }
 393
 394 void Window::SetLayoutManager(LayoutManager* layout_manager) {
 395   if (layout_manager == layout_manager_)
 396     return;
 397   layout_manager_.reset(layout_manager);
 398   if (!layout_manager)
 399     return;
 400   // If we're changing to a new layout manager, ensure it is aware of all the
 401   // existing child windows.
 402   for (Windows::const_iterator it = children_.begin();
 403        it != children_.end();
 404        ++it)
 405     layout_manager_->OnWindowAddedToLayout(*it);
 406 }
 407
 408 scoped_ptr<ui::EventTargeter>
 409 Window::SetEventTargeter(scoped_ptr<ui::EventTargeter> targeter) {
 410   scoped_ptr<ui::EventTargeter> old_targeter = targeter_.Pass();
 411   targeter_ = targeter.Pass();
 412   return old_targeter.Pass();
 413 }
 414
 415 void Window::SetBounds(const gfx::Rect& new_bounds) {
 416   if (parent_ && parent_->layout_manager())
 417     parent_->layout_manager()->SetChildBounds(this, new_bounds);
 418   else {
 419     // Ensure we don't go smaller than our minimum bounds.
 420     gfx::Rect final_bounds(new_bounds);
 421     if (delegate_) {
 422       const gfx::Size& min_size = delegate_->GetMinimumSize();
 423       final_bounds.set_width(std::max(min_size.width(), final_bounds.width()));
 424       final_bounds.set_height(std::max(min_size.height(),
 425                                        final_bounds.height()));
 426     }
 427     SetBoundsInternal(final_bounds);
 428   }
 429 }
 430
 431 void Window::SetBoundsInScreen(const gfx::Rect& new_bounds_in_screen,
 432                                const gfx::Display& dst_display) {
 433   Window* root = GetRootWindow();
 434   if (root) {
 435     aura::client::ScreenPositionClient* screen_position_client =
 436         aura::client::GetScreenPositionClient(root);
 437     screen_position_client->SetBounds(this, new_bounds_in_screen, dst_display);
 438     return;
 439   }
 440   SetBounds(new_bounds_in_screen);
 441 }
 442
 443 gfx::Rect Window::GetTargetBounds() const {
 444   if (!layer())
 445     return bounds();
 446
 447   if (!parent_ || parent_->layer())
 448     return layer()->GetTargetBounds();
 449
 450   // We have a layer but our parent (who is valid) doesn't. This means the
 451   // coordinates of the layer are relative to the first ancestor with a layer;
 452   // convert to be relative to parent.
 453   gfx::Vector2d offset;
 454   const aura::Window* ancestor_with_layer =
 455       parent_->GetAncestorWithLayer(&offset);
 456   if (!ancestor_with_layer)
 457     return layer()->GetTargetBounds();
 458
 459   gfx::Rect layer_target_bounds = layer()->GetTargetBounds();
 460   layer_target_bounds -= offset;
 461   return layer_target_bounds;
 462 }
 463
 464 void Window::SchedulePaintInRect(const gfx::Rect& rect) {
 465   layer()->SchedulePaint(rect);
 466 }
 467
 468 void Window::StackChildAtTop(Window* child) {
 469   if (children_.size() <= 1 || child == children_.back())
 470     return;  // In the front already.
 471   StackChildAbove(child, children_.back());
 472 }
 473
 474 void Window::StackChildAbove(Window* child, Window* target) {
 475   StackChildRelativeTo(child, target, STACK_ABOVE);
 476 }
 477
 478 void Window::StackChildAtBottom(Window* child) {
 479   if (children_.size() <= 1 || child == children_.front())
 480     return;  // At the bottom already.
 481   StackChildBelow(child, children_.front());
 482 }
 483
 484 void Window::StackChildBelow(Window* child, Window* target) {
 485   StackChildRelativeTo(child, target, STACK_BELOW);
 486 }
 487
 488 void Window::AddChild(Window* child) {
 489   WindowObserver::HierarchyChangeParams params;
 490   params.target = child;
 491   params.new_parent = this;
 492   params.old_parent = child->parent();
 493   params.phase = WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGING;
 494   NotifyWindowHierarchyChange(params);
 495
 496   Window* old_root = child->GetRootWindow();
 497
 498   DCHECK(std::find(children_.begin(), children_.end(), child) ==
 499       children_.end());
 500   if (child->parent())
 501     child->parent()->RemoveChildImpl(child, this);
 502
 503   gfx::Vector2d offset;
 504   aura::Window* ancestor_with_layer = GetAncestorWithLayer(&offset);
 505
 506   child->parent_ = this;
 507
 508   if (ancestor_with_layer) {
 509     offset += child->bounds().OffsetFromOrigin();
 510     child->ReparentLayers(ancestor_with_layer->layer(), offset);
 511   }
 512
 513   children_.push_back(child);
 514   if (layout_manager_)
 515     layout_manager_->OnWindowAddedToLayout(child);
 516   FOR_EACH_OBSERVER(WindowObserver, observers_, OnWindowAdded(child));
 517   child->OnParentChanged();
 518
 519   Window* root_window = GetRootWindow();
 520   if (root_window && old_root != root_window) {
 521     root_window->GetHost()->dispatcher()->OnWindowAddedToRootWindow(child);
 522     child->NotifyAddedToRootWindow();
 523   }
 524
 525   params.phase = WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGED;
 526   NotifyWindowHierarchyChange(params);
 527 }
 528
 529 void Window::RemoveChild(Window* child) {
 530   WindowObserver::HierarchyChangeParams params;
 531   params.target = child;
 532   params.new_parent = NULL;
 533   params.old_parent = this;
 534   params.phase = WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGING;
 535   NotifyWindowHierarchyChange(params);
 536
 537   RemoveChildImpl(child, NULL);
 538
 539   params.phase = WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGED;
 540   NotifyWindowHierarchyChange(params);
 541 }
 542
 543 bool Window::Contains(const Window* other) const {
 544   for (const Window* parent = other; parent; parent = parent->parent_) {
 545     if (parent == this)
 546       return true;
 547   }
 548   return false;
 549 }
 550
 551 Window* Window::GetChildById(int id) {
 552   return const_cast<Window*>(const_cast<const Window*>(this)->GetChildById(id));
 553 }
 554
 555 const Window* Window::GetChildById(int id) const {
 556   Windows::const_iterator i;
 557   for (i = children_.begin(); i != children_.end(); ++i) {
 558     if ((*i)->id() == id)
 559       return *i;
 560     const Window* result = (*i)->GetChildById(id);
 561     if (result)
 562       return result;
 563   }
 564   return NULL;
 565 }
 566
 567 // static
 568 void Window::ConvertPointToTarget(const Window* source,
 569                                   const Window* target,
 570                                   gfx::Point* point) {
 571   if (!source)
 572     return;
 573   if (source->GetRootWindow() != target->GetRootWindow()) {
 574     client::ScreenPositionClient* source_client =
 575         client::GetScreenPositionClient(source->GetRootWindow());
 576     // |source_client| can be NULL in tests.
 577     if (source_client)
 578       source_client->ConvertPointToScreen(source, point);
 579
 580     client::ScreenPositionClient* target_client =
 581         client::GetScreenPositionClient(target->GetRootWindow());
 582     // |target_client| can be NULL in tests.
 583     if (target_client)
 584       target_client->ConvertPointFromScreen(target, point);
 585   } else if ((source != target) && (!source->layer() || !target->layer())) {
 586     if (!source->layer()) {
 587       gfx::Vector2d offset_to_layer;
 588       source = source->GetAncestorWithLayer(&offset_to_layer);
 589       *point += offset_to_layer;
 590     }
 591     if (!target->layer()) {
 592       gfx::Vector2d offset_to_layer;
 593       target = target->GetAncestorWithLayer(&offset_to_layer);
 594       *point -= offset_to_layer;
 595     }
 596     ui::Layer::ConvertPointToLayer(source->layer(), target->layer(), point);
 597   } else {
 598     ui::Layer::ConvertPointToLayer(source->layer(), target->layer(), point);
 599   }
 600 }
 601
 602 // static
 603 void Window::ConvertRectToTarget(const Window* source,
 604                                  const Window* target,
 605                                  gfx::Rect* rect) {
 606   DCHECK(rect);
 607   gfx::Point origin = rect->origin();
 608   ConvertPointToTarget(source, target, &origin);
 609   rect->set_origin(origin);
 610 }
 611
 612 ui::TextInputClient* Window::GetFocusedTextInputClient() {
 613   return delegate_ ? delegate_->GetFocusedTextInputClient() : nullptr;
 614 }
 615
 616 void Window::MoveCursorTo(const gfx::Point& point_in_window) {
 617   Window* root_window = GetRootWindow();
 618   DCHECK(root_window);
 619   gfx::Point point_in_root(point_in_window);
 620   ConvertPointToTarget(this, root_window, &point_in_root);
 621   root_window->GetHost()->MoveCursorTo(point_in_root);
 622 }
 623
 624 gfx::NativeCursor Window::GetCursor(const gfx::Point& point) const {
 625   return delegate_ ? delegate_->GetCursor(point) : gfx::kNullCursor;
 626 }
 627
 628 void Window::AddObserver(WindowObserver* observer) {
 629   observer->OnObservingWindow(this);
 630   observers_.AddObserver(observer);
 631 }
 632
 633 void Window::RemoveObserver(WindowObserver* observer) {
 634   observer->OnUnobservingWindow(this);
 635   observers_.RemoveObserver(observer);
 636 }
 637
 638 bool Window::HasObserver(const WindowObserver* observer) const {
 639   return observers_.HasObserver(observer);
 640 }
 641
 642 bool Window::ContainsPointInRoot(const gfx::Point& point_in_root) const {
 643   const Window* root_window = GetRootWindow();
 644   if (!root_window)
 645     return false;
 646   gfx::Point local_point(point_in_root);
 647   ConvertPointToTarget(root_window, this, &local_point);
 648   return gfx::Rect(GetTargetBounds().size()).Contains(local_point);
 649 }
 650
 651 bool Window::ContainsPoint(const gfx::Point& local_point) const {
 652   return gfx::Rect(bounds().size()).Contains(local_point);
 653 }
 654
 655 Window* Window::GetEventHandlerForPoint(const gfx::Point& local_point) {
 656   return GetWindowForPoint(local_point, true, true);
 657 }
 658
 659 Window* Window::GetTopWindowContainingPoint(const gfx::Point& local_point) {
 660   return GetWindowForPoint(local_point, false, false);
 661 }
 662
 663 Window* Window::GetToplevelWindow() {
 664   Window* topmost_window_with_delegate = NULL;
 665   for (aura::Window* window = this; window != NULL; window = window->parent()) {
 666     if (window->delegate())
 667       topmost_window_with_delegate = window;
 668   }
 669   return topmost_window_with_delegate;
 670 }
 671
 672 void Window::Focus() {
 673   client::FocusClient* client = client::GetFocusClient(this);
 674   DCHECK(client);
 675   client->FocusWindow(this);
 676 }
 677
 678 bool Window::HasFocus() const {
 679   client::FocusClient* client = client::GetFocusClient(this);
 680   return client && client->GetFocusedWindow() == this;
 681 }
 682
 683 bool Window::CanFocus() const {
 684   if (IsRootWindow())
 685     return IsVisible();
 686
 687   // NOTE: as part of focusing the window the ActivationClient may make the
 688   // window visible (by way of making a hidden ancestor visible). For this
 689   // reason we can't check visibility here and assume the client is doing it.
 690   if (!parent_ || (delegate_ && !delegate_->CanFocus()))
 691     return false;
 692
 693   // The client may forbid certain windows from receiving focus at a given point
 694   // in time.
 695   client::EventClient* client = client::GetEventClient(GetRootWindow());
 696   if (client && !client->CanProcessEventsWithinSubtree(this))
 697     return false;
 698
 699   return parent_->CanFocus();
 700 }
 701
 702 bool Window::CanReceiveEvents() const {
 703   if (IsRootWindow())
 704     return IsVisible();
 705
 706   // The client may forbid certain windows from receiving events at a given
 707   // point in time.
 708   client::EventClient* client = client::GetEventClient(GetRootWindow());
 709   if (client && !client->CanProcessEventsWithinSubtree(this))
 710     return false;
 711
 712   return parent_ && IsVisible() && parent_->CanReceiveEvents();
 713 }
 714
 715 void Window::SetCapture() {
 716   if (!IsVisible())
 717     return;
 718
 719   Window* root_window = GetRootWindow();
 720   if (!root_window)
 721     return;
 722   client::CaptureClient* capture_client = client::GetCaptureClient(root_window);
 723   if (!capture_client)
 724     return;
 725   client::GetCaptureClient(root_window)->SetCapture(this);
 726 }
 727
 728 void Window::ReleaseCapture() {
 729   Window* root_window = GetRootWindow();
 730   if (!root_window)
 731     return;
 732   client::CaptureClient* capture_client = client::GetCaptureClient(root_window);
 733   if (!capture_client)
 734     return;
 735   client::GetCaptureClient(root_window)->ReleaseCapture(this);
 736 }
 737
 738 bool Window::HasCapture() {
 739   Window* root_window = GetRootWindow();
 740   if (!root_window)
 741     return false;
 742   client::CaptureClient* capture_client = client::GetCaptureClient(root_window);
 743   return capture_client && capture_client->GetCaptureWindow() == this;
 744 }
 745
 746 void Window::SuppressPaint() {
 747   layer()->SuppressPaint();
 748 }
 749
 750 // {Set,Get,Clear}Property are implemented in window_property.h.
 751
 752 void Window::SetNativeWindowProperty(const char* key, void* value) {
 753   SetPropertyInternal(
 754       key, key, NULL, reinterpret_cast<int64>(value), 0);
 755 }
 756
 757 void* Window::GetNativeWindowProperty(const char* key) const {
 758   return reinterpret_cast<void*>(GetPropertyInternal(key, 0));
 759 }
 760
 761 void Window::OnDeviceScaleFactorChanged(float device_scale_factor) {
 762   ScopedCursorHider hider(this);
 763   if (delegate_)
 764     delegate_->OnDeviceScaleFactorChanged(device_scale_factor);
 765 }
 766
 767 #if !defined(NDEBUG)
 768 std::string Window::GetDebugInfo() const {
 769   return base::StringPrintf(
 770       "%s<%d> bounds(%d, %d, %d, %d) %s %s opacity=%.1f",
 771       name().empty() ? "Unknown" : name().c_str(), id(),
 772       bounds().x(), bounds().y(), bounds().width(), bounds().height(),
 773       visible_ ? "WindowVisible" : "WindowHidden",
 774       layer() ?
 775           (layer()->GetTargetVisibility() ? "LayerVisible" : "LayerHidden") :
 776           "NoLayer",
 777       layer() ? layer()->opacity() : 1.0f);
 778 }
 779
 780 void Window::PrintWindowHierarchy(int depth) const {
 781   VLOG(0) << base::StringPrintf(
 782       "%*s%s", depth * 2, "", GetDebugInfo().c_str());
 783   for (Windows::const_iterator it = children_.begin();
 784        it != children_.end(); ++it) {
 785     Window* child = *it;
 786     child->PrintWindowHierarchy(depth + 1);
 787   }
 788 }
 789 #endif
 790
 791 void Window::RemoveOrDestroyChildren() {
 792   while (!children_.empty()) {
 793     Window* child = children_[0];
 794     if (child->owned_by_parent_) {
 795       delete child;
 796       // Deleting the child so remove it from out children_ list.
 797       DCHECK(std::find(children_.begin(), children_.end(), child) ==
 798              children_.end());
 799     } else {
 800       // Even if we can't delete the child, we still need to remove it from the
 801       // parent so that relevant bookkeeping (parent_ back-pointers etc) are
 802       // updated.
 803       RemoveChild(child);
 804     }
 805   }
 806 }
 807
 808 ///////////////////////////////////////////////////////////////////////////////
 809 // Window, private:
 810
 811 int64 Window::SetPropertyInternal(const void* key,
 812                                   const char* name,
 813                                   PropertyDeallocator deallocator,
 814                                   int64 value,
 815                                   int64 default_value) {
 816   int64 old = GetPropertyInternal(key, default_value);
 817   if (value == default_value) {
 818     prop_map_.erase(key);
 819   } else {
 820     Value prop_value;
 821     prop_value.name = name;
 822     prop_value.value = value;
 823     prop_value.deallocator = deallocator;
 824     prop_map_[key] = prop_value;
 825   }
 826   FOR_EACH_OBSERVER(WindowObserver, observers_,
 827                     OnWindowPropertyChanged(this, key, old));
 828   return old;
 829 }
 830
 831 int64 Window::GetPropertyInternal(const void* key,
 832                                   int64 default_value) const {
 833   std::map<const void*, Value>::const_iterator iter = prop_map_.find(key);
 834   if (iter == prop_map_.end())
 835     return default_value;
 836   return iter->second.value;
 837 }
 838
 839 bool Window::HitTest(const gfx::Point& local_point) {
 840   gfx::Rect local_bounds(bounds().size());
 841   if (!delegate_ || !delegate_->HasHitTestMask())
 842     return local_bounds.Contains(local_point);
 843
 844   gfx::Path mask;
 845   delegate_->GetHitTestMask(&mask);
 846
 847   SkRegion clip_region;
 848   clip_region.setRect(local_bounds.x(), local_bounds.y(),
 849                       local_bounds.width(), local_bounds.height());
 850   SkRegion mask_region;
 851   return mask_region.setPath(mask, clip_region) &&
 852       mask_region.contains(local_point.x(), local_point.y());
 853 }
 854
 855 void Window::SetBoundsInternal(const gfx::Rect& new_bounds) {
 856   gfx::Rect actual_new_bounds(new_bounds);
 857   gfx::Rect old_bounds = GetTargetBounds();
 858
 859   // Always need to set the layer's bounds -- even if it is to the same thing.
 860   // This may cause important side effects such as stopping animation.
 861   if (!layer()) {
 862     const gfx::Vector2d origin_delta = new_bounds.OffsetFromOrigin() -
 863         bounds_.OffsetFromOrigin();
 864     bounds_ = new_bounds;
 865     OffsetLayerBounds(origin_delta);
 866   } else {
 867     if (parent_ && !parent_->layer()) {
 868       gfx::Vector2d offset;
 869       const aura::Window* ancestor_with_layer =
 870           parent_->GetAncestorWithLayer(&offset);
 871       if (ancestor_with_layer)
 872         actual_new_bounds.Offset(offset);
 873     }
 874     layer()->SetBounds(actual_new_bounds);
 875   }
 876
 877   // If we are currently not the layer's delegate, we will not get bounds
 878   // changed notification from the layer (this typically happens after animating
 879   // hidden). We must notify ourselves.
 880   if (!layer() || layer()->delegate() != this)
 881     OnWindowBoundsChanged(old_bounds);
 882 }
 883
 884 void Window::SetVisible(bool visible) {
 885   // TODO(vadimt): Remove ScopedTracker below once crbug.com/440919 is fixed.
 886   tracked_objects::ScopedTracker tracking_profile(
 887       FROM_HERE_WITH_EXPLICIT_FUNCTION("440919 Window::SetVisible"));
 888
 889   if ((layer() && visible == layer()->GetTargetVisibility()) ||
 890       (!layer() && visible == visible_))
 891     return;  // No change.
 892
 893   FOR_EACH_OBSERVER(WindowObserver, observers_,
 894                     OnWindowVisibilityChanging(this, visible));
 895
 896   client::VisibilityClient* visibility_client =
 897       client::GetVisibilityClient(this);
 898   if (visibility_client)
 899     visibility_client->UpdateLayerVisibility(this, visible);
 900   else
 901     layer()->SetVisible(visible);
 902   visible_ = visible;
 903   SchedulePaint();
 904   if (parent_ && parent_->layout_manager_)
 905     parent_->layout_manager_->OnChildWindowVisibilityChanged(this, visible);
 906
 907   if (delegate_)
 908     delegate_->OnWindowTargetVisibilityChanged(visible);
 909
 910   NotifyWindowVisibilityChanged(this, visible);
 911 }
 912
 913 void Window::SchedulePaint() {
 914   SchedulePaintInRect(gfx::Rect(0, 0, bounds().width(), bounds().height()));
 915 }
 916
 917 void Window::Paint(const ui::PaintContext& context) {
 918   if (delegate_)
 919     delegate_->OnPaint(context);
 920 }
 921
 922 Window* Window::GetWindowForPoint(const gfx::Point& local_point,
 923                                   bool return_tightest,
 924                                   bool for_event_handling) {
 925   if (!IsVisible())
 926     return NULL;
 927
 928   if ((for_event_handling && !HitTest(local_point)) ||
 929       (!for_event_handling && !ContainsPoint(local_point)))
 930     return NULL;
 931
 932   // Check if I should claim this event and not pass it to my children because
 933   // the location is inside my hit test override area.  For details, see
 934   // set_hit_test_bounds_override_inner().
 935   if (for_event_handling && !hit_test_bounds_override_inner_.empty()) {
 936     gfx::Rect inset_local_bounds(gfx::Point(), bounds().size());
 937     inset_local_bounds.Inset(hit_test_bounds_override_inner_);
 938     // We know we're inside the normal local bounds, so if we're outside the
 939     // inset bounds we must be in the special hit test override area.
 940     DCHECK(HitTest(local_point));
 941     if (!inset_local_bounds.Contains(local_point))
 942       return delegate_ ? this : NULL;
 943   }
 944
 945   if (!return_tightest && delegate_)
 946     return this;
 947
 948   for (Windows::const_reverse_iterator it = children_.rbegin(),
 949            rend = children_.rend();
 950        it != rend; ++it) {
 951     Window* child = *it;
 952
 953     if (for_event_handling) {
 954       if (child->ignore_events_)
 955         continue;
 956       // The client may not allow events to be processed by certain subtrees.
 957       client::EventClient* client = client::GetEventClient(GetRootWindow());
 958       if (client && !client->CanProcessEventsWithinSubtree(child))
 959         continue;
 960       if (delegate_ && !delegate_->ShouldDescendIntoChildForEventHandling(
 961               child, local_point))
 962         continue;
 963     }
 964
 965     gfx::Point point_in_child_coords(local_point);
 966     ConvertPointToTarget(this, child, &point_in_child_coords);
 967     Window* match = child->GetWindowForPoint(point_in_child_coords,
 968                                              return_tightest,
 969                                              for_event_handling);
 970     if (match)
 971       return match;
 972   }
 973
 974   return delegate_ ? this : NULL;
 975 }
 976
 977 void Window::RemoveChildImpl(Window* child, Window* new_parent) {
 978   if (layout_manager_)
 979     layout_manager_->OnWillRemoveWindowFromLayout(child);
 980   FOR_EACH_OBSERVER(WindowObserver, observers_, OnWillRemoveWindow(child));
 981   Window* root_window = child->GetRootWindow();
 982   Window* new_root_window = new_parent ? new_parent->GetRootWindow() : NULL;
 983   if (root_window && root_window != new_root_window)
 984     child->NotifyRemovingFromRootWindow(new_root_window);
 985
 986   gfx::Vector2d offset;
 987   GetAncestorWithLayer(&offset);
 988   child->UnparentLayers(!layer(), offset);
 989   child->parent_ = NULL;
 990   Windows::iterator i = std::find(children_.begin(), children_.end(), child);
 991   DCHECK(i != children_.end());
 992   children_.erase(i);
 993   child->OnParentChanged();
 994   if (layout_manager_)
 995     layout_manager_->OnWindowRemovedFromLayout(child);
 996 }
 997
 998 void Window::UnparentLayers(bool has_layerless_ancestor,
 999                             const gfx::Vector2d& offset) {
1000   if (!layer()) {
1001     const gfx::Vector2d new_offset = offset + bounds().OffsetFromOrigin();
1002     for (size_t i = 0; i < children_.size(); ++i) {
1003       children_[i]->UnparentLayers(true, new_offset);
1004     }
1005   } else {
1006     // Only remove the layer if we still own it.  Someone else may have acquired
1007     // ownership of it via AcquireLayer() and may expect the hierarchy to go
1008     // unchanged as the Window is destroyed.
1009     if (OwnsLayer()) {
1010       if (layer()->parent())
1011         layer()->parent()->Remove(layer());
1012       if (has_layerless_ancestor) {
1013         const gfx::Rect real_bounds(bounds_);
1014         gfx::Rect layer_bounds(layer()->bounds());
1015         layer_bounds.Offset(-offset);
1016         layer()->SetBounds(layer_bounds);
1017         bounds_ = real_bounds;
1018       }
1019     }
1020   }
1021 }
1022
1023 void Window::ReparentLayers(ui::Layer* parent_layer,
1024                             const gfx::Vector2d& offset) {
1025   if (!layer()) {
1026     for (size_t i = 0; i < children_.size(); ++i) {
1027       children_[i]->ReparentLayers(
1028           parent_layer,
1029           offset + children_[i]->bounds().OffsetFromOrigin());
1030     }
1031   } else {
1032     const gfx::Rect real_bounds(bounds());
1033     parent_layer->Add(layer());
1034     gfx::Rect layer_bounds(layer()->bounds().size());
1035     layer_bounds += offset;
1036     layer()->SetBounds(layer_bounds);
1037     bounds_ = real_bounds;
1038   }
1039 }
1040
1041 void Window::OffsetLayerBounds(const gfx::Vector2d& offset) {
1042   if (!layer()) {
1043     for (size_t i = 0; i < children_.size(); ++i)
1044       children_[i]->OffsetLayerBounds(offset);
1045   } else {
1046     gfx::Rect layer_bounds(layer()->bounds());
1047     layer_bounds += offset;
1048     layer()->SetBounds(layer_bounds);
1049   }
1050 }
1051
1052 void Window::OnParentChanged() {
1053   FOR_EACH_OBSERVER(
1054       WindowObserver, observers_, OnWindowParentChanged(this, parent_));
1055 }
1056
1057 void Window::StackChildRelativeTo(Window* child,
1058                                   Window* target,
1059                                   StackDirection direction) {
1060   DCHECK_NE(child, target);
1061   DCHECK(child);
1062   DCHECK(target);
1063   DCHECK_EQ(this, child->parent());
1064   DCHECK_EQ(this, target->parent());
1065
1066   client::WindowStackingClient* stacking_client =
1067       client::GetWindowStackingClient();
1068   if (stacking_client &&
1069       !stacking_client->AdjustStacking(&child, &target, &direction))
1070     return;
1071
1072   const size_t child_i =
1073       std::find(children_.begin(), children_.end(), child) - children_.begin();
1074   const size_t target_i =
1075       std::find(children_.begin(), children_.end(), target) - children_.begin();
1076
1077   // Don't move the child if it is already in the right place.
1078   if ((direction == STACK_ABOVE && child_i == target_i + 1) ||
1079       (direction == STACK_BELOW && child_i + 1 == target_i))
1080     return;
1081
1082   const size_t dest_i =
1083       direction == STACK_ABOVE ?
1084       (child_i < target_i ? target_i : target_i + 1) :
1085       (child_i < target_i ? target_i - 1 : target_i);
1086   children_.erase(children_.begin() + child_i);
1087   children_.insert(children_.begin() + dest_i, child);
1088
1089   StackChildLayerRelativeTo(child, target, direction);
1090
1091   child->OnStackingChanged();
1092 }
1093
1094 void Window::StackChildLayerRelativeTo(Window* child,
1095                                        Window* target,
1096                                        StackDirection direction) {
1097   Window* ancestor_with_layer = GetAncestorWithLayer(NULL);
1098   ui::Layer* ancestor_layer =
1099       ancestor_with_layer ? ancestor_with_layer->layer() : NULL;
1100   if (!ancestor_layer)
1101     return;
1102
1103   if (child->layer() && target->layer()) {
1104     if (direction == STACK_ABOVE)
1105       ancestor_layer->StackAbove(child->layer(), target->layer());
1106     else
1107       ancestor_layer->StackBelow(child->layer(), target->layer());
1108     return;
1109   }
1110   typedef std::vector<ui::Layer*> Layers;
1111   Layers layers;
1112   GetLayersToStack(child, &layers);
1113   if (layers.empty())
1114     return;
1115
1116   ui::Layer* target_layer;
1117   if (direction == STACK_ABOVE) {
1118     target_layer =
1119         FindStackingTargetLayer<Windows::const_reverse_iterator>(target, child);
1120   } else {
1121     target_layer =
1122         FindStackingTargetLayer<Windows::const_iterator>(target, child);
1123   }
1124
1125   if (!target_layer) {
1126     if (direction == STACK_ABOVE) {
1127       for (Layers::const_reverse_iterator i = layers.rbegin(),
1128                rend = layers.rend(); i != rend; ++i) {
1129         ancestor_layer->StackAtBottom(*i);
1130       }
1131     } else {
1132       for (Layers::const_iterator i = layers.begin(); i != layers.end(); ++i)
1133         ancestor_layer->StackAtTop(*i);
1134     }
1135     return;
1136   }
1137
1138   if (direction == STACK_ABOVE) {
1139     for (Layers::const_reverse_iterator i = layers.rbegin(),
1140              rend = layers.rend(); i != rend; ++i) {
1141       ancestor_layer->StackAbove(*i, target_layer);
1142     }
1143   } else {
1144     for (Layers::const_iterator i = layers.begin(); i != layers.end(); ++i)
1145       ancestor_layer->StackBelow(*i, target_layer);
1146   }
1147 }
1148
1149 void Window::OnStackingChanged() {
1150   FOR_EACH_OBSERVER(WindowObserver, observers_, OnWindowStackingChanged(this));
1151 }
1152
1153 void Window::NotifyRemovingFromRootWindow(Window* new_root) {
1154   FOR_EACH_OBSERVER(WindowObserver, observers_,
1155                     OnWindowRemovingFromRootWindow(this, new_root));
1156   for (Window::Windows::const_iterator it = children_.begin();
1157        it != children_.end(); ++it) {
1158     (*it)->NotifyRemovingFromRootWindow(new_root);
1159   }
1160 }
1161
1162 void Window::NotifyAddedToRootWindow() {
1163   FOR_EACH_OBSERVER(WindowObserver, observers_,
1164                     OnWindowAddedToRootWindow(this));
1165   for (Window::Windows::const_iterator it = children_.begin();
1166        it != children_.end(); ++it) {
1167     (*it)->NotifyAddedToRootWindow();
1168   }
1169 }
1170
1171 void Window::NotifyWindowHierarchyChange(
1172     const WindowObserver::HierarchyChangeParams& params) {
1173   params.target->NotifyWindowHierarchyChangeDown(params);
1174   switch (params.phase) {
1175   case WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGING:
1176     if (params.old_parent)
1177       params.old_parent->NotifyWindowHierarchyChangeUp(params);
1178     break;
1179   case WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGED:
1180     if (params.new_parent)
1181       params.new_parent->NotifyWindowHierarchyChangeUp(params);
1182     break;
1183   default:
1184     NOTREACHED();
1185     break;
1186   }
1187 }
1188
1189 void Window::NotifyWindowHierarchyChangeDown(
1190     const WindowObserver::HierarchyChangeParams& params) {
1191   NotifyWindowHierarchyChangeAtReceiver(params);
1192   for (Window::Windows::const_iterator it = children_.begin();
1193        it != children_.end(); ++it) {
1194     (*it)->NotifyWindowHierarchyChangeDown(params);
1195   }
1196 }
1197
1198 void Window::NotifyWindowHierarchyChangeUp(
1199     const WindowObserver::HierarchyChangeParams& params) {
1200   for (Window* window = this; window; window = window->parent())
1201     window->NotifyWindowHierarchyChangeAtReceiver(params);
1202 }
1203
1204 void Window::NotifyWindowHierarchyChangeAtReceiver(
1205     const WindowObserver::HierarchyChangeParams& params) {
1206   WindowObserver::HierarchyChangeParams local_params = params;
1207   local_params.receiver = this;
1208
1209   switch (params.phase) {
1210   case WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGING:
1211     FOR_EACH_OBSERVER(WindowObserver, observers_,
1212                       OnWindowHierarchyChanging(local_params));
1213     break;
1214   case WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGED:
1215     FOR_EACH_OBSERVER(WindowObserver, observers_,
1216                       OnWindowHierarchyChanged(local_params));
1217     break;
1218   default:
1219     NOTREACHED();
1220     break;
1221   }
1222 }
1223
1224 void Window::NotifyWindowVisibilityChanged(aura::Window* target,
1225                                            bool visible) {
1226   if (!NotifyWindowVisibilityChangedDown(target, visible)) {
1227     return; // |this| has been deleted.
1228   }
1229   NotifyWindowVisibilityChangedUp(target, visible);
1230 }
1231
1232 bool Window::NotifyWindowVisibilityChangedAtReceiver(aura::Window* target,
1233                                                      bool visible) {
1234   // |this| may be deleted during a call to OnWindowVisibilityChanged() on one
1235   // of the observers. We create an local observer for that. In that case we
1236   // exit without further access to any members.
1237   WindowTracker tracker;
1238   tracker.Add(this);
1239   FOR_EACH_OBSERVER(WindowObserver, observers_,
1240                     OnWindowVisibilityChanged(target, visible));
1241   return tracker.Contains(this);
1242 }
1243
1244 bool Window::NotifyWindowVisibilityChangedDown(aura::Window* target,
1245                                                bool visible) {
1246   if (!NotifyWindowVisibilityChangedAtReceiver(target, visible))
1247     return false; // |this| was deleted.
1248   std::set<const Window*> child_already_processed;
1249   bool child_destroyed = false;
1250   do {
1251     child_destroyed = false;
1252     for (Window::Windows::const_iterator it = children_.begin();
1253          it != children_.end(); ++it) {
1254       if (!child_already_processed.insert(*it).second)
1255         continue;
1256       if (!(*it)->NotifyWindowVisibilityChangedDown(target, visible)) {
1257         // |*it| was deleted, |it| is invalid and |children_| has changed.
1258         // We exit the current for-loop and enter a new one.
1259         child_destroyed = true;
1260         break;
1261       }
1262     }
1263   } while (child_destroyed);
1264   return true;
1265 }
1266
1267 void Window::NotifyWindowVisibilityChangedUp(aura::Window* target,
1268                                              bool visible) {
1269   // Start with the parent as we already notified |this|
1270   // in NotifyWindowVisibilityChangedDown.
1271   for (Window* window = parent(); window; window = window->parent()) {
1272     bool ret = window->NotifyWindowVisibilityChangedAtReceiver(target, visible);
1273     DCHECK(ret);
1274   }
1275 }
1276
1277 void Window::NotifyAncestorWindowTransformed(Window* source) {
1278   FOR_EACH_OBSERVER(WindowObserver, observers_,
1279                     OnAncestorWindowTransformed(source, this));
1280   for (Window::Windows::const_iterator it = children_.begin();
1281        it != children_.end(); ++it) {
1282     (*it)->NotifyAncestorWindowTransformed(source);
1283   }
1284 }
1285
1286 void Window::OnWindowBoundsChanged(const gfx::Rect& old_bounds) {
1287   bounds_ = layer()->bounds();
1288   if (parent_ && !parent_->layer()) {
1289     gfx::Vector2d offset;
1290     aura::Window* ancestor_with_layer = parent_->GetAncestorWithLayer(&offset);
1291     if (ancestor_with_layer)
1292       bounds_.Offset(-offset);
1293   }
1294
1295   if (layout_manager_)
1296     layout_manager_->OnWindowResized();
1297   if (delegate_)
1298     delegate_->OnBoundsChanged(old_bounds, bounds());
1299   FOR_EACH_OBSERVER(WindowObserver,
1300                     observers_,
1301                     OnWindowBoundsChanged(this, old_bounds, bounds()));
1302 }
1303
1304 bool Window::CleanupGestureState() {
1305   bool state_modified = false;
1306   state_modified |= ui::GestureRecognizer::Get()->CancelActiveTouches(this);
1307   state_modified |=
1308       ui::GestureRecognizer::Get()->CleanupStateForConsumer(this);
1309   for (Window::Windows::iterator iter = children_.begin();
1310        iter != children_.end();
1311        ++iter) {
1312     state_modified |= (*iter)->CleanupGestureState();
1313   }
1314   return state_modified;
1315 }
1316
1317 void Window::OnPaintLayer(const ui::PaintContext& context) {
1318   Paint(context);
1319 }
1320
1321 void Window::OnDelegatedFrameDamage(const gfx::Rect& damage_rect_in_dip) {
1322   DCHECK(layer());
1323   FOR_EACH_OBSERVER(WindowObserver,
1324                     observers_,
1325                     OnDelegatedFrameDamage(this, damage_rect_in_dip));
1326 }
1327
1328 base::Closure Window::PrepareForLayerBoundsChange() {
1329   return base::Bind(&Window::OnWindowBoundsChanged, base::Unretained(this),
1330                     bounds());
1331 }
1332
1333 bool Window::CanAcceptEvent(const ui::Event& event) {
1334   // The client may forbid certain windows from receiving events at a given
1335   // point in time.
1336   client::EventClient* client = client::GetEventClient(GetRootWindow());
1337   if (client && !client->CanProcessEventsWithinSubtree(this))
1338     return false;
1339
1340   // We need to make sure that a touch cancel event and any gesture events it
1341   // creates can always reach the window. This ensures that we receive a valid
1342   // touch / gesture stream.
1343   if (event.IsEndingEvent())
1344     return true;
1345
1346   if (!IsVisible())
1347     return false;
1348
1349   // The top-most window can always process an event.
1350   if (!parent_)
1351     return true;
1352
1353   // For located events (i.e. mouse, touch etc.), an assumption is made that
1354   // windows that don't have a default event-handler cannot process the event
1355   // (see more in GetWindowForPoint()). This assumption is not made for key
1356   // events.
1357   return event.IsKeyEvent() || target_handler();
1358 }
1359
1360 ui::EventTarget* Window::GetParentTarget() {
1361   if (IsRootWindow()) {
1362     return client::GetEventClient(this) ?
1363         client::GetEventClient(this)->GetToplevelEventTarget() :
1364             Env::GetInstance();
1365   }
1366   return parent_;
1367 }
1368
1369 scoped_ptr<ui::EventTargetIterator> Window::GetChildIterator() const {
1370   return make_scoped_ptr(new ui::EventTargetIteratorImpl<Window>(children()));
1371 }
1372
1373 ui::EventTargeter* Window::GetEventTargeter() {
1374   return targeter_.get();
1375 }
1376
1377 void Window::ConvertEventToTarget(ui::EventTarget* target,
1378                                   ui::LocatedEvent* event) {
1379   event->ConvertLocationToTarget(this,
1380                                  static_cast<Window*>(target));
1381 }
1382
1383 void Window::UpdateLayerName() {
1384 #if !defined(NDEBUG)
1385   DCHECK(layer());
1386
1387   std::string layer_name(name_);
1388   if (layer_name.empty())
1389     layer_name = "Unnamed Window";
1390
1391   if (id_ != -1)
1392     layer_name += " " + base::IntToString(id_);
1393
1394   layer()->set_name(layer_name);
1395 #endif
1396 }
1397
1398 const Window* Window::GetAncestorWithLayer(gfx::Vector2d* offset) const {
1399   for (const aura::Window* window = this; window; window = window->parent()) {
1400     if (window->layer())
1401       return window;
1402     if (offset)
1403       *offset += window->bounds().OffsetFromOrigin();
1404   }
1405   if (offset)
1406     *offset = gfx::Vector2d();
1407   return NULL;
1408 }
1409
1410 }  // namespace aura