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/strings/string_number_conversions.h" 14 #include "base/strings/string_util.h" 15 #include "base/strings/stringprintf.h" 16 #include "ui/aura/client/capture_client.h" 17 #include "ui/aura/client/cursor_client.h" 18 #include "ui/aura/client/event_client.h" 19 #include "ui/aura/client/focus_client.h" 20 #include "ui/aura/client/screen_position_client.h" 21 #include "ui/aura/client/visibility_client.h" 22 #include "ui/aura/client/window_stacking_client.h" 23 #include "ui/aura/env.h" 24 #include "ui/aura/layout_manager.h" 25 #include "ui/aura/window_delegate.h" 26 #include "ui/aura/window_event_dispatcher.h" 27 #include "ui/aura/window_observer.h" 28 #include "ui/aura/window_tracker.h" 29 #include "ui/aura/window_tree_host.h" 30 #include "ui/compositor/compositor.h" 31 #include "ui/compositor/layer.h" 32 #include "ui/events/event_target_iterator.h" 33 #include "ui/gfx/canvas.h" 34 #include "ui/gfx/path.h" 35 #include "ui/gfx/scoped_canvas.h" 36 #include "ui/gfx/screen.h" 37 38 namespace aura { 39 40 namespace { 41 42 ui::LayerType WindowLayerTypeToUILayerType(WindowLayerType window_layer_type) { 43 switch (window_layer_type) { 44 case WINDOW_LAYER_NONE: 45 break; 46 case WINDOW_LAYER_NOT_DRAWN: 47 return ui::LAYER_NOT_DRAWN; 48 case WINDOW_LAYER_TEXTURED: 49 return ui::LAYER_TEXTURED; 50 case WINDOW_LAYER_SOLID_COLOR: 51 return ui::LAYER_SOLID_COLOR; 52 } 53 NOTREACHED(); 54 return ui::LAYER_NOT_DRAWN; 55 } 56 57 // Used when searching for a Window to stack relative to. 58 template <class T> 59 T IteratorForDirectionBegin(aura::Window* window); 60 61 template <> 62 Window::Windows::const_iterator IteratorForDirectionBegin( 63 aura::Window* window) { 64 return window->children().begin(); 65 } 66 67 template <> 68 Window::Windows::const_reverse_iterator IteratorForDirectionBegin( 69 aura::Window* window) { 70 return window->children().rbegin(); 71 } 72 73 template <class T> 74 T IteratorForDirectionEnd(aura::Window* window); 75 76 template <> 77 Window::Windows::const_iterator IteratorForDirectionEnd(aura::Window* window) { 78 return window->children().end(); 79 } 80 81 template <> 82 Window::Windows::const_reverse_iterator IteratorForDirectionEnd( 83 aura::Window* window) { 84 return window->children().rend(); 85 } 86 87 // Depth first search for the first Window with a layer to stack relative 88 // to. Starts at target. Does not descend into |ignore|. 89 template <class T> 90 ui::Layer* FindStackingTargetLayerDown(aura::Window* target, 91 aura::Window* ignore) { 92 if (target == ignore) 93 return NULL; 94 95 if (target->layer()) 96 return target->layer(); 97 98 for (T i = IteratorForDirectionBegin<T>(target); 99 i != IteratorForDirectionEnd<T>(target); ++i) { 100 ui::Layer* layer = FindStackingTargetLayerDown<T>(*i, ignore); 101 if (layer) 102 return layer; 103 } 104 return NULL; 105 } 106 107 // Depth first search through the siblings of |target||. This does not search 108 // all the siblings, only those before/after |target| (depening upon the 109 // template type) and ignoring |ignore|. Returns the Layer of the first Window 110 // encountered with a Layer. 111 template <class T> 112 ui::Layer* FindStackingLayerInSiblings(aura::Window* target, 113 aura::Window* ignore) { 114 aura::Window* parent = target->parent(); 115 for (T i = std::find(IteratorForDirectionBegin<T>(parent), 116 IteratorForDirectionEnd<T>(parent), target); 117 i != IteratorForDirectionEnd<T>(parent); ++i) { 118 ui::Layer* layer = FindStackingTargetLayerDown<T>(*i, ignore); 119 if (layer) 120 return layer; 121 } 122 return NULL; 123 } 124 125 // Returns the first Window that has a Layer. This does a depth first search 126 // through the descendants of |target| first, then ascends up doing a depth 127 // first search through siblings of all ancestors until a Layer is found or an 128 // ancestor with a layer is found. This is intended to locate a layer to stack 129 // other layers relative to. 130 template <class T> 131 ui::Layer* FindStackingTargetLayer(aura::Window* target, aura::Window* ignore) { 132 ui::Layer* result = FindStackingTargetLayerDown<T>(target, ignore); 133 if (result) 134 return result; 135 while (target->parent()) { 136 ui::Layer* result = FindStackingLayerInSiblings<T>(target, ignore); 137 if (result) 138 return result; 139 target = target->parent(); 140 if (target->layer()) 141 return NULL; 142 } 143 return NULL; 144 } 145 146 // Does a depth first search for all descendants of |child| that have layers. 147 // This stops at any descendants that have layers (and adds them to |layers|). 148 void GetLayersToStack(aura::Window* child, std::vector<ui::Layer*>* layers) { 149 if (child->layer()) { 150 layers->push_back(child->layer()); 151 return; 152 } 153 for (size_t i = 0; i < child->children().size(); ++i) 154 GetLayersToStack(child->children()[i], layers); 155 } 156 157 } // namespace 158 159 class ScopedCursorHider { 160 public: 161 explicit ScopedCursorHider(Window* window) 162 : window_(window), 163 hid_cursor_(false) { 164 if (!window_->IsRootWindow()) 165 return; 166 const bool cursor_is_in_bounds = window_->GetBoundsInScreen().Contains( 167 Env::GetInstance()->last_mouse_location()); 168 client::CursorClient* cursor_client = client::GetCursorClient(window_); 169 if (cursor_is_in_bounds && cursor_client && 170 cursor_client->IsCursorVisible()) { 171 cursor_client->HideCursor(); 172 hid_cursor_ = true; 173 } 174 } 175 ~ScopedCursorHider() { 176 if (!window_->IsRootWindow()) 177 return; 178 179 // Update the device scale factor of the cursor client only when the last 180 // mouse location is on this root window. 181 if (hid_cursor_) { 182 client::CursorClient* cursor_client = client::GetCursorClient(window_); 183 if (cursor_client) { 184 const gfx::Display& display = 185 gfx::Screen::GetScreenFor(window_)->GetDisplayNearestWindow( 186 window_); 187 cursor_client->SetDisplay(display); 188 cursor_client->ShowCursor(); 189 } 190 } 191 } 192 193 private: 194 Window* window_; 195 bool hid_cursor_; 196 197 DISALLOW_COPY_AND_ASSIGN(ScopedCursorHider); 198 }; 199 200 Window::Window(WindowDelegate* delegate) 201 : host_(NULL), 202 type_(ui::wm::WINDOW_TYPE_UNKNOWN), 203 owned_by_parent_(true), 204 delegate_(delegate), 205 parent_(NULL), 206 visible_(false), 207 id_(-1), 208 transparent_(false), 209 user_data_(NULL), 210 ignore_events_(false), 211 // Don't notify newly added observers during notification. This causes 212 // problems for code that adds an observer as part of an observer 213 // notification (such as the workspace code). 214 observers_(ObserverList<WindowObserver>::NOTIFY_EXISTING_ONLY) { 215 set_target_handler(delegate_); 216 } 217 218 Window::~Window() { 219 // |layer()| can be NULL during tests, or if this Window is layerless. 220 if (layer()) { 221 if (layer()->owner() == this) 222 layer()->CompleteAllAnimations(); 223 layer()->SuppressPaint(); 224 } 225 226 // Let the delegate know we're in the processing of destroying. 227 if (delegate_) 228 delegate_->OnWindowDestroying(this); 229 FOR_EACH_OBSERVER(WindowObserver, observers_, OnWindowDestroying(this)); 230 231 // TODO(beng): See comment in window_event_dispatcher.h. This shouldn't be 232 // necessary but unfortunately is right now due to ordering 233 // peculiarities. WED must be notified _after_ other observers 234 // are notified of pending teardown but before the hierarchy 235 // is actually torn down. 236 WindowTreeHost* host = GetHost(); 237 if (host) 238 host->dispatcher()->OnPostNotifiedWindowDestroying(this); 239 240 // The window should have already had its state cleaned up in 241 // WindowEventDispatcher::OnWindowHidden(), but there have been some crashes 242 // involving windows being destroyed without being hidden first. See 243 // crbug.com/342040. This should help us debug the issue. TODO(tdresser): 244 // remove this once we determine why we have windows that are destroyed 245 // without being hidden. 246 bool window_incorrectly_cleaned_up = CleanupGestureState(); 247 CHECK(!window_incorrectly_cleaned_up); 248 249 // Then destroy the children. 250 RemoveOrDestroyChildren(); 251 252 // The window needs to be removed from the parent before calling the 253 // WindowDestroyed callbacks of delegate and the observers. 254 if (parent_) 255 parent_->RemoveChild(this); 256 257 if (delegate_) 258 delegate_->OnWindowDestroyed(this); 259 ObserverListBase<WindowObserver>::Iterator iter(observers_); 260 WindowObserver* observer; 261 while ((observer = iter.GetNext())) { 262 RemoveObserver(observer); 263 observer->OnWindowDestroyed(this); 264 } 265 266 // Clear properties. 267 for (std::map<const void*, Value>::const_iterator iter = prop_map_.begin(); 268 iter != prop_map_.end(); 269 ++iter) { 270 if (iter->second.deallocator) 271 (*iter->second.deallocator)(iter->second.value); 272 } 273 prop_map_.clear(); 274 275 // If we have layer it will either be destroyed by |layer_owner_|'s dtor, or 276 // by whoever acquired it. We don't have a layer if Init() wasn't invoked or 277 // we are layerless. 278 if (layer()) 279 layer()->set_delegate(NULL); 280 DestroyLayer(); 281 } 282 283 void Window::Init(WindowLayerType window_layer_type) { 284 if (window_layer_type != WINDOW_LAYER_NONE) { 285 SetLayer(new ui::Layer(WindowLayerTypeToUILayerType(window_layer_type))); 286 layer()->SetVisible(false); 287 layer()->set_delegate(this); 288 UpdateLayerName(); 289 layer()->SetFillsBoundsOpaquely(!transparent_); 290 } 291 292 Env::GetInstance()->NotifyWindowInitialized(this); 293 } 294 295 void Window::SetType(ui::wm::WindowType type) { 296 // Cannot change type after the window is initialized. 297 DCHECK(!layer()); 298 type_ = type; 299 } 300 301 void Window::SetName(const std::string& name) { 302 name_ = name; 303 304 if (layer()) 305 UpdateLayerName(); 306 } 307 308 void Window::SetTransparent(bool transparent) { 309 transparent_ = transparent; 310 if (layer()) 311 layer()->SetFillsBoundsOpaquely(!transparent_); 312 } 313 314 void Window::SetFillsBoundsCompletely(bool fills_bounds) { 315 if (layer()) 316 layer()->SetFillsBoundsCompletely(fills_bounds); 317 } 318 319 Window* Window::GetRootWindow() { 320 return const_cast<Window*>( 321 static_cast<const Window*>(this)->GetRootWindow()); 322 } 323 324 const Window* Window::GetRootWindow() const { 325 return IsRootWindow() ? this : parent_ ? parent_->GetRootWindow() : NULL; 326 } 327 328 WindowTreeHost* Window::GetHost() { 329 return const_cast<WindowTreeHost*>(const_cast<const Window*>(this)-> 330 GetHost()); 331 } 332 333 const WindowTreeHost* Window::GetHost() const { 334 const Window* root_window = GetRootWindow(); 335 return root_window ? root_window->host_ : NULL; 336 } 337 338 void Window::Show() { 339 if (layer()) { 340 DCHECK_EQ(visible_, layer()->GetTargetVisibility()); 341 // It is not allowed that a window is visible but the layers alpha is fully 342 // transparent since the window would still be considered to be active but 343 // could not be seen. 344 DCHECK(!(visible_ && layer()->GetTargetOpacity() == 0.0f)); 345 } 346 SetVisible(true); 347 } 348 349 void Window::Hide() { 350 // RootWindow::OnVisibilityChanged will call ReleaseCapture. 351 SetVisible(false); 352 } 353 354 bool Window::IsVisible() const { 355 // Layer visibility can be inconsistent with window visibility, for example 356 // when a Window is hidden, we want this function to return false immediately 357 // after, even though the client may decide to animate the hide effect (and 358 // so the layer will be visible for some time after Hide() is called). 359 for (const Window* window = this; window; window = window->parent()) { 360 if (!window->visible_) 361 return false; 362 if (window->layer()) 363 return window->layer()->IsDrawn(); 364 } 365 return false; 366 } 367 368 gfx::Rect Window::GetBoundsInRootWindow() const { 369 // TODO(beng): There may be a better way to handle this, and the existing code 370 // is likely wrong anyway in a multi-display world, but this will 371 // do for now. 372 if (!GetRootWindow()) 373 return bounds(); 374 gfx::Point origin = bounds().origin(); 375 ConvertPointToTarget(parent_, GetRootWindow(), &origin); 376 return gfx::Rect(origin, bounds().size()); 377 } 378 379 gfx::Rect Window::GetBoundsInScreen() const { 380 gfx::Rect bounds(GetBoundsInRootWindow()); 381 const Window* root = GetRootWindow(); 382 if (root) { 383 aura::client::ScreenPositionClient* screen_position_client = 384 aura::client::GetScreenPositionClient(root); 385 if (screen_position_client) { 386 gfx::Point origin = bounds.origin(); 387 screen_position_client->ConvertPointToScreen(root, &origin); 388 bounds.set_origin(origin); 389 } 390 } 391 return bounds; 392 } 393 394 void Window::SetTransform(const gfx::Transform& transform) { 395 if (!layer()) { 396 // Transforms aren't supported on layerless windows. 397 NOTREACHED(); 398 return; 399 } 400 FOR_EACH_OBSERVER(WindowObserver, observers_, 401 OnWindowTransforming(this)); 402 layer()->SetTransform(transform); 403 FOR_EACH_OBSERVER(WindowObserver, observers_, 404 OnWindowTransformed(this)); 405 } 406 407 void Window::SetLayoutManager(LayoutManager* layout_manager) { 408 if (layout_manager == layout_manager_) 409 return; 410 layout_manager_.reset(layout_manager); 411 if (!layout_manager) 412 return; 413 // If we're changing to a new layout manager, ensure it is aware of all the 414 // existing child windows. 415 for (Windows::const_iterator it = children_.begin(); 416 it != children_.end(); 417 ++it) 418 layout_manager_->OnWindowAddedToLayout(*it); 419 } 420 421 scoped_ptr<ui::EventTargeter> 422 Window::SetEventTargeter(scoped_ptr<ui::EventTargeter> targeter) { 423 scoped_ptr<ui::EventTargeter> old_targeter = targeter_.Pass(); 424 targeter_ = targeter.Pass(); 425 return old_targeter.Pass(); 426 } 427 428 void Window::SetBounds(const gfx::Rect& new_bounds) { 429 if (parent_ && parent_->layout_manager()) 430 parent_->layout_manager()->SetChildBounds(this, new_bounds); 431 else { 432 // Ensure we don't go smaller than our minimum bounds. 433 gfx::Rect final_bounds(new_bounds); 434 if (delegate_) { 435 const gfx::Size& min_size = delegate_->GetMinimumSize(); 436 final_bounds.set_width(std::max(min_size.width(), final_bounds.width())); 437 final_bounds.set_height(std::max(min_size.height(), 438 final_bounds.height())); 439 } 440 SetBoundsInternal(final_bounds); 441 } 442 } 443 444 void Window::SetBoundsInScreen(const gfx::Rect& new_bounds_in_screen, 445 const gfx::Display& dst_display) { 446 Window* root = GetRootWindow(); 447 if (root) { 448 gfx::Point origin = new_bounds_in_screen.origin(); 449 aura::client::ScreenPositionClient* screen_position_client = 450 aura::client::GetScreenPositionClient(root); 451 screen_position_client->SetBounds(this, new_bounds_in_screen, dst_display); 452 return; 453 } 454 SetBounds(new_bounds_in_screen); 455 } 456 457 gfx::Rect Window::GetTargetBounds() const { 458 if (!layer()) 459 return bounds(); 460 461 if (!parent_ || parent_->layer()) 462 return layer()->GetTargetBounds(); 463 464 // We have a layer but our parent (who is valid) doesn't. This means the 465 // coordinates of the layer are relative to the first ancestor with a layer; 466 // convert to be relative to parent. 467 gfx::Vector2d offset; 468 const aura::Window* ancestor_with_layer = 469 parent_->GetAncestorWithLayer(&offset); 470 if (!ancestor_with_layer) 471 return layer()->GetTargetBounds(); 472 473 gfx::Rect layer_target_bounds = layer()->GetTargetBounds(); 474 layer_target_bounds -= offset; 475 return layer_target_bounds; 476 } 477 478 void Window::SchedulePaintInRect(const gfx::Rect& rect) { 479 if (!layer() && parent_) { 480 // Notification of paint scheduled happens for the window with a layer. 481 gfx::Rect parent_rect(bounds().size()); 482 parent_rect.Intersect(rect); 483 if (!parent_rect.IsEmpty()) { 484 parent_rect.Offset(bounds().origin().OffsetFromOrigin()); 485 parent_->SchedulePaintInRect(parent_rect); 486 } 487 } else if (layer() && layer()->SchedulePaint(rect)) { 488 FOR_EACH_OBSERVER( 489 WindowObserver, observers_, OnWindowPaintScheduled(this, rect)); 490 } 491 } 492 493 void Window::StackChildAtTop(Window* child) { 494 if (children_.size() <= 1 || child == children_.back()) 495 return; // In the front already. 496 StackChildAbove(child, children_.back()); 497 } 498 499 void Window::StackChildAbove(Window* child, Window* target) { 500 StackChildRelativeTo(child, target, STACK_ABOVE); 501 } 502 503 void Window::StackChildAtBottom(Window* child) { 504 if (children_.size() <= 1 || child == children_.front()) 505 return; // At the bottom already. 506 StackChildBelow(child, children_.front()); 507 } 508 509 void Window::StackChildBelow(Window* child, Window* target) { 510 StackChildRelativeTo(child, target, STACK_BELOW); 511 } 512 513 void Window::AddChild(Window* child) { 514 WindowObserver::HierarchyChangeParams params; 515 params.target = child; 516 params.new_parent = this; 517 params.old_parent = child->parent(); 518 params.phase = WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGING; 519 NotifyWindowHierarchyChange(params); 520 521 Window* old_root = child->GetRootWindow(); 522 523 DCHECK(std::find(children_.begin(), children_.end(), child) == 524 children_.end()); 525 if (child->parent()) 526 child->parent()->RemoveChildImpl(child, this); 527 528 gfx::Vector2d offset; 529 aura::Window* ancestor_with_layer = GetAncestorWithLayer(&offset); 530 531 child->parent_ = this; 532 533 if (ancestor_with_layer) { 534 offset += child->bounds().OffsetFromOrigin(); 535 child->ReparentLayers(ancestor_with_layer->layer(), offset); 536 } 537 538 children_.push_back(child); 539 if (layout_manager_) 540 layout_manager_->OnWindowAddedToLayout(child); 541 FOR_EACH_OBSERVER(WindowObserver, observers_, OnWindowAdded(child)); 542 child->OnParentChanged(); 543 544 Window* root_window = GetRootWindow(); 545 if (root_window && old_root != root_window) { 546 root_window->GetHost()->dispatcher()->OnWindowAddedToRootWindow(child); 547 child->NotifyAddedToRootWindow(); 548 } 549 550 params.phase = WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGED; 551 NotifyWindowHierarchyChange(params); 552 } 553 554 void Window::RemoveChild(Window* child) { 555 WindowObserver::HierarchyChangeParams params; 556 params.target = child; 557 params.new_parent = NULL; 558 params.old_parent = this; 559 params.phase = WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGING; 560 NotifyWindowHierarchyChange(params); 561 562 RemoveChildImpl(child, NULL); 563 564 params.phase = WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGED; 565 NotifyWindowHierarchyChange(params); 566 } 567 568 bool Window::Contains(const Window* other) const { 569 for (const Window* parent = other; parent; parent = parent->parent_) { 570 if (parent == this) 571 return true; 572 } 573 return false; 574 } 575 576 Window* Window::GetChildById(int id) { 577 return const_cast<Window*>(const_cast<const Window*>(this)->GetChildById(id)); 578 } 579 580 const Window* Window::GetChildById(int id) const { 581 Windows::const_iterator i; 582 for (i = children_.begin(); i != children_.end(); ++i) { 583 if ((*i)->id() == id) 584 return *i; 585 const Window* result = (*i)->GetChildById(id); 586 if (result) 587 return result; 588 } 589 return NULL; 590 } 591 592 // static 593 void Window::ConvertPointToTarget(const Window* source, 594 const Window* target, 595 gfx::Point* point) { 596 if (!source) 597 return; 598 if (source->GetRootWindow() != target->GetRootWindow()) { 599 client::ScreenPositionClient* source_client = 600 client::GetScreenPositionClient(source->GetRootWindow()); 601 // |source_client| can be NULL in tests. 602 if (source_client) 603 source_client->ConvertPointToScreen(source, point); 604 605 client::ScreenPositionClient* target_client = 606 client::GetScreenPositionClient(target->GetRootWindow()); 607 // |target_client| can be NULL in tests. 608 if (target_client) 609 target_client->ConvertPointFromScreen(target, point); 610 } else if ((source != target) && (!source->layer() || !target->layer())) { 611 if (!source->layer()) { 612 gfx::Vector2d offset_to_layer; 613 source = source->GetAncestorWithLayer(&offset_to_layer); 614 *point += offset_to_layer; 615 } 616 if (!target->layer()) { 617 gfx::Vector2d offset_to_layer; 618 target = target->GetAncestorWithLayer(&offset_to_layer); 619 *point -= offset_to_layer; 620 } 621 ui::Layer::ConvertPointToLayer(source->layer(), target->layer(), point); 622 } else { 623 ui::Layer::ConvertPointToLayer(source->layer(), target->layer(), point); 624 } 625 } 626 627 // static 628 void Window::ConvertRectToTarget(const Window* source, 629 const Window* target, 630 gfx::Rect* rect) { 631 DCHECK(rect); 632 gfx::Point origin = rect->origin(); 633 ConvertPointToTarget(source, target, &origin); 634 rect->set_origin(origin); 635 } 636 637 void Window::MoveCursorTo(const gfx::Point& point_in_window) { 638 Window* root_window = GetRootWindow(); 639 DCHECK(root_window); 640 gfx::Point point_in_root(point_in_window); 641 ConvertPointToTarget(this, root_window, &point_in_root); 642 root_window->GetHost()->MoveCursorTo(point_in_root); 643 } 644 645 gfx::NativeCursor Window::GetCursor(const gfx::Point& point) const { 646 return delegate_ ? delegate_->GetCursor(point) : gfx::kNullCursor; 647 } 648 649 void Window::AddObserver(WindowObserver* observer) { 650 observer->OnObservingWindow(this); 651 observers_.AddObserver(observer); 652 } 653 654 void Window::RemoveObserver(WindowObserver* observer) { 655 observer->OnUnobservingWindow(this); 656 observers_.RemoveObserver(observer); 657 } 658 659 bool Window::HasObserver(WindowObserver* observer) { 660 return observers_.HasObserver(observer); 661 } 662 663 bool Window::ContainsPointInRoot(const gfx::Point& point_in_root) const { 664 const Window* root_window = GetRootWindow(); 665 if (!root_window) 666 return false; 667 gfx::Point local_point(point_in_root); 668 ConvertPointToTarget(root_window, this, &local_point); 669 return gfx::Rect(GetTargetBounds().size()).Contains(local_point); 670 } 671 672 bool Window::ContainsPoint(const gfx::Point& local_point) const { 673 return gfx::Rect(bounds().size()).Contains(local_point); 674 } 675 676 Window* Window::GetEventHandlerForPoint(const gfx::Point& local_point) { 677 return GetWindowForPoint(local_point, true, true); 678 } 679 680 Window* Window::GetTopWindowContainingPoint(const gfx::Point& local_point) { 681 return GetWindowForPoint(local_point, false, false); 682 } 683 684 Window* Window::GetToplevelWindow() { 685 Window* topmost_window_with_delegate = NULL; 686 for (aura::Window* window = this; window != NULL; window = window->parent()) { 687 if (window->delegate()) 688 topmost_window_with_delegate = window; 689 } 690 return topmost_window_with_delegate; 691 } 692 693 void Window::Focus() { 694 client::FocusClient* client = client::GetFocusClient(this); 695 DCHECK(client); 696 client->FocusWindow(this); 697 } 698 699 void Window::Blur() { 700 client::FocusClient* client = client::GetFocusClient(this); 701 DCHECK(client); 702 client->FocusWindow(NULL); 703 } 704 705 bool Window::HasFocus() const { 706 client::FocusClient* client = client::GetFocusClient(this); 707 return client && client->GetFocusedWindow() == this; 708 } 709 710 bool Window::CanFocus() const { 711 if (IsRootWindow()) 712 return IsVisible(); 713 714 // NOTE: as part of focusing the window the ActivationClient may make the 715 // window visible (by way of making a hidden ancestor visible). For this 716 // reason we can't check visibility here and assume the client is doing it. 717 if (!parent_ || (delegate_ && !delegate_->CanFocus())) 718 return false; 719 720 // The client may forbid certain windows from receiving focus at a given point 721 // in time. 722 client::EventClient* client = client::GetEventClient(GetRootWindow()); 723 if (client && !client->CanProcessEventsWithinSubtree(this)) 724 return false; 725 726 return parent_->CanFocus(); 727 } 728 729 bool Window::CanReceiveEvents() const { 730 if (IsRootWindow()) 731 return IsVisible(); 732 733 // The client may forbid certain windows from receiving events at a given 734 // point in time. 735 client::EventClient* client = client::GetEventClient(GetRootWindow()); 736 if (client && !client->CanProcessEventsWithinSubtree(this)) 737 return false; 738 739 return parent_ && IsVisible() && parent_->CanReceiveEvents(); 740 } 741 742 void Window::SetCapture() { 743 if (!IsVisible()) 744 return; 745 746 Window* root_window = GetRootWindow(); 747 if (!root_window) 748 return; 749 client::GetCaptureClient(root_window)->SetCapture(this); 750 } 751 752 void Window::ReleaseCapture() { 753 Window* root_window = GetRootWindow(); 754 if (!root_window) 755 return; 756 client::GetCaptureClient(root_window)->ReleaseCapture(this); 757 } 758 759 bool Window::HasCapture() { 760 Window* root_window = GetRootWindow(); 761 if (!root_window) 762 return false; 763 client::CaptureClient* capture_client = client::GetCaptureClient(root_window); 764 return capture_client && capture_client->GetCaptureWindow() == this; 765 } 766 767 void Window::SuppressPaint() { 768 if (layer()) 769 layer()->SuppressPaint(); 770 } 771 772 // {Set,Get,Clear}Property are implemented in window_property.h. 773 774 void Window::SetNativeWindowProperty(const char* key, void* value) { 775 SetPropertyInternal( 776 key, key, NULL, reinterpret_cast<int64>(value), 0); 777 } 778 779 void* Window::GetNativeWindowProperty(const char* key) const { 780 return reinterpret_cast<void*>(GetPropertyInternal(key, 0)); 781 } 782 783 void Window::OnDeviceScaleFactorChanged(float device_scale_factor) { 784 ScopedCursorHider hider(this); 785 if (IsRootWindow()) 786 host_->OnDeviceScaleFactorChanged(device_scale_factor); 787 if (delegate_) 788 delegate_->OnDeviceScaleFactorChanged(device_scale_factor); 789 } 790 791 #if !defined(NDEBUG) 792 std::string Window::GetDebugInfo() const { 793 return base::StringPrintf( 794 "%s<%d> bounds(%d, %d, %d, %d) %s %s opacity=%.1f", 795 name().empty() ? "Unknown" : name().c_str(), id(), 796 bounds().x(), bounds().y(), bounds().width(), bounds().height(), 797 visible_ ? "WindowVisible" : "WindowHidden", 798 layer() ? 799 (layer()->GetTargetVisibility() ? "LayerVisible" : "LayerHidden") : 800 "NoLayer", 801 layer() ? layer()->opacity() : 1.0f); 802 } 803 804 void Window::PrintWindowHierarchy(int depth) const { 805 VLOG(0) << base::StringPrintf( 806 "%*s%s", depth * 2, "", GetDebugInfo().c_str()); 807 for (Windows::const_iterator it = children_.begin(); 808 it != children_.end(); ++it) { 809 Window* child = *it; 810 child->PrintWindowHierarchy(depth + 1); 811 } 812 } 813 #endif 814 815 void Window::RemoveOrDestroyChildren() { 816 while (!children_.empty()) { 817 Window* child = children_[0]; 818 if (child->owned_by_parent_) { 819 delete child; 820 // Deleting the child so remove it from out children_ list. 821 DCHECK(std::find(children_.begin(), children_.end(), child) == 822 children_.end()); 823 } else { 824 // Even if we can't delete the child, we still need to remove it from the 825 // parent so that relevant bookkeeping (parent_ back-pointers etc) are 826 // updated. 827 RemoveChild(child); 828 } 829 } 830 } 831 832 /////////////////////////////////////////////////////////////////////////////// 833 // Window, private: 834 835 int64 Window::SetPropertyInternal(const void* key, 836 const char* name, 837 PropertyDeallocator deallocator, 838 int64 value, 839 int64 default_value) { 840 int64 old = GetPropertyInternal(key, default_value); 841 if (value == default_value) { 842 prop_map_.erase(key); 843 } else { 844 Value prop_value; 845 prop_value.name = name; 846 prop_value.value = value; 847 prop_value.deallocator = deallocator; 848 prop_map_[key] = prop_value; 849 } 850 FOR_EACH_OBSERVER(WindowObserver, observers_, 851 OnWindowPropertyChanged(this, key, old)); 852 return old; 853 } 854 855 int64 Window::GetPropertyInternal(const void* key, 856 int64 default_value) const { 857 std::map<const void*, Value>::const_iterator iter = prop_map_.find(key); 858 if (iter == prop_map_.end()) 859 return default_value; 860 return iter->second.value; 861 } 862 863 bool Window::HitTest(const gfx::Point& local_point) { 864 gfx::Rect local_bounds(bounds().size()); 865 if (!delegate_ || !delegate_->HasHitTestMask()) 866 return local_bounds.Contains(local_point); 867 868 gfx::Path mask; 869 delegate_->GetHitTestMask(&mask); 870 871 SkRegion clip_region; 872 clip_region.setRect(local_bounds.x(), local_bounds.y(), 873 local_bounds.width(), local_bounds.height()); 874 SkRegion mask_region; 875 return mask_region.setPath(mask, clip_region) && 876 mask_region.contains(local_point.x(), local_point.y()); 877 } 878 879 void Window::SetBoundsInternal(const gfx::Rect& new_bounds) { 880 gfx::Rect actual_new_bounds(new_bounds); 881 gfx::Rect old_bounds = GetTargetBounds(); 882 883 // Always need to set the layer's bounds -- even if it is to the same thing. 884 // This may cause important side effects such as stopping animation. 885 if (!layer()) { 886 const gfx::Vector2d origin_delta = new_bounds.OffsetFromOrigin() - 887 bounds_.OffsetFromOrigin(); 888 bounds_ = new_bounds; 889 OffsetLayerBounds(origin_delta); 890 } else { 891 if (parent_ && !parent_->layer()) { 892 gfx::Vector2d offset; 893 const aura::Window* ancestor_with_layer = 894 parent_->GetAncestorWithLayer(&offset); 895 if (ancestor_with_layer) 896 actual_new_bounds.Offset(offset); 897 } 898 layer()->SetBounds(actual_new_bounds); 899 } 900 901 // If we are currently not the layer's delegate, we will not get bounds 902 // changed notification from the layer (this typically happens after animating 903 // hidden). We must notify ourselves. 904 if (!layer() || layer()->delegate() != this) 905 OnWindowBoundsChanged(old_bounds); 906 } 907 908 void Window::SetVisible(bool visible) { 909 if ((layer() && visible == layer()->GetTargetVisibility()) || 910 (!layer() && visible == visible_)) 911 return; // No change. 912 913 FOR_EACH_OBSERVER(WindowObserver, observers_, 914 OnWindowVisibilityChanging(this, visible)); 915 916 client::VisibilityClient* visibility_client = 917 client::GetVisibilityClient(this); 918 if (visibility_client) 919 visibility_client->UpdateLayerVisibility(this, visible); 920 else if (layer()) 921 layer()->SetVisible(visible); 922 visible_ = visible; 923 SchedulePaint(); 924 if (parent_ && parent_->layout_manager_) 925 parent_->layout_manager_->OnChildWindowVisibilityChanged(this, visible); 926 927 if (delegate_) 928 delegate_->OnWindowTargetVisibilityChanged(visible); 929 930 NotifyWindowVisibilityChanged(this, visible); 931 } 932 933 void Window::SchedulePaint() { 934 SchedulePaintInRect(gfx::Rect(0, 0, bounds().width(), bounds().height())); 935 } 936 937 void Window::Paint(gfx::Canvas* canvas) { 938 if (delegate_) 939 delegate_->OnPaint(canvas); 940 PaintLayerlessChildren(canvas); 941 } 942 943 void Window::PaintLayerlessChildren(gfx::Canvas* canvas) { 944 for (size_t i = 0, count = children_.size(); i < count; ++i) { 945 Window* child = children_[i]; 946 if (!child->layer() && child->visible_) { 947 gfx::ScopedCanvas scoped_canvas(canvas); 948 canvas->ClipRect(child->bounds()); 949 if (!canvas->IsClipEmpty()) { 950 canvas->Translate(child->bounds().OffsetFromOrigin()); 951 child->Paint(canvas); 952 } 953 } 954 } 955 } 956 957 Window* Window::GetWindowForPoint(const gfx::Point& local_point, 958 bool return_tightest, 959 bool for_event_handling) { 960 if (!IsVisible()) 961 return NULL; 962 963 if ((for_event_handling && !HitTest(local_point)) || 964 (!for_event_handling && !ContainsPoint(local_point))) 965 return NULL; 966 967 // Check if I should claim this event and not pass it to my children because 968 // the location is inside my hit test override area. For details, see 969 // set_hit_test_bounds_override_inner(). 970 if (for_event_handling && !hit_test_bounds_override_inner_.empty()) { 971 gfx::Rect inset_local_bounds(gfx::Point(), bounds().size()); 972 inset_local_bounds.Inset(hit_test_bounds_override_inner_); 973 // We know we're inside the normal local bounds, so if we're outside the 974 // inset bounds we must be in the special hit test override area. 975 DCHECK(HitTest(local_point)); 976 if (!inset_local_bounds.Contains(local_point)) 977 return delegate_ ? this : NULL; 978 } 979 980 if (!return_tightest && delegate_) 981 return this; 982 983 for (Windows::const_reverse_iterator it = children_.rbegin(), 984 rend = children_.rend(); 985 it != rend; ++it) { 986 Window* child = *it; 987 988 if (for_event_handling) { 989 if (child->ignore_events_) 990 continue; 991 // The client may not allow events to be processed by certain subtrees. 992 client::EventClient* client = client::GetEventClient(GetRootWindow()); 993 if (client && !client->CanProcessEventsWithinSubtree(child)) 994 continue; 995 if (delegate_ && !delegate_->ShouldDescendIntoChildForEventHandling( 996 child, local_point)) 997 continue; 998 } 999 1000 gfx::Point point_in_child_coords(local_point); 1001 ConvertPointToTarget(this, child, &point_in_child_coords); 1002 Window* match = child->GetWindowForPoint(point_in_child_coords, 1003 return_tightest, 1004 for_event_handling); 1005 if (match) 1006 return match; 1007 } 1008 1009 return delegate_ ? this : NULL; 1010 } 1011 1012 void Window::RemoveChildImpl(Window* child, Window* new_parent) { 1013 if (layout_manager_) 1014 layout_manager_->OnWillRemoveWindowFromLayout(child); 1015 FOR_EACH_OBSERVER(WindowObserver, observers_, OnWillRemoveWindow(child)); 1016 Window* root_window = child->GetRootWindow(); 1017 Window* new_root_window = new_parent ? new_parent->GetRootWindow() : NULL; 1018 if (root_window && root_window != new_root_window) 1019 child->NotifyRemovingFromRootWindow(new_root_window); 1020 1021 gfx::Vector2d offset; 1022 GetAncestorWithLayer(&offset); 1023 child->UnparentLayers(!layer(), offset); 1024 child->parent_ = NULL; 1025 Windows::iterator i = std::find(children_.begin(), children_.end(), child); 1026 DCHECK(i != children_.end()); 1027 children_.erase(i); 1028 child->OnParentChanged(); 1029 if (layout_manager_) 1030 layout_manager_->OnWindowRemovedFromLayout(child); 1031 } 1032 1033 void Window::UnparentLayers(bool has_layerless_ancestor, 1034 const gfx::Vector2d& offset) { 1035 if (!layer()) { 1036 const gfx::Vector2d new_offset = offset + bounds().OffsetFromOrigin(); 1037 for (size_t i = 0; i < children_.size(); ++i) { 1038 children_[i]->UnparentLayers(true, new_offset); 1039 } 1040 } else { 1041 // Only remove the layer if we still own it. Someone else may have acquired 1042 // ownership of it via AcquireLayer() and may expect the hierarchy to go 1043 // unchanged as the Window is destroyed. 1044 if (OwnsLayer()) { 1045 if (layer()->parent()) 1046 layer()->parent()->Remove(layer()); 1047 if (has_layerless_ancestor) { 1048 const gfx::Rect real_bounds(bounds_); 1049 gfx::Rect layer_bounds(layer()->bounds()); 1050 layer_bounds.Offset(-offset); 1051 layer()->SetBounds(layer_bounds); 1052 bounds_ = real_bounds; 1053 } 1054 } 1055 } 1056 } 1057 1058 void Window::ReparentLayers(ui::Layer* parent_layer, 1059 const gfx::Vector2d& offset) { 1060 if (!layer()) { 1061 for (size_t i = 0; i < children_.size(); ++i) { 1062 children_[i]->ReparentLayers( 1063 parent_layer, 1064 offset + children_[i]->bounds().OffsetFromOrigin()); 1065 } 1066 } else { 1067 const gfx::Rect real_bounds(bounds()); 1068 parent_layer->Add(layer()); 1069 gfx::Rect layer_bounds(layer()->bounds().size()); 1070 layer_bounds += offset; 1071 layer()->SetBounds(layer_bounds); 1072 bounds_ = real_bounds; 1073 } 1074 } 1075 1076 void Window::OffsetLayerBounds(const gfx::Vector2d& offset) { 1077 if (!layer()) { 1078 for (size_t i = 0; i < children_.size(); ++i) 1079 children_[i]->OffsetLayerBounds(offset); 1080 } else { 1081 gfx::Rect layer_bounds(layer()->bounds()); 1082 layer_bounds += offset; 1083 layer()->SetBounds(layer_bounds); 1084 } 1085 } 1086 1087 void Window::OnParentChanged() { 1088 FOR_EACH_OBSERVER( 1089 WindowObserver, observers_, OnWindowParentChanged(this, parent_)); 1090 } 1091 1092 void Window::StackChildRelativeTo(Window* child, 1093 Window* target, 1094 StackDirection direction) { 1095 DCHECK_NE(child, target); 1096 DCHECK(child); 1097 DCHECK(target); 1098 DCHECK_EQ(this, child->parent()); 1099 DCHECK_EQ(this, target->parent()); 1100 1101 client::WindowStackingClient* stacking_client = 1102 client::GetWindowStackingClient(); 1103 if (stacking_client && 1104 !stacking_client->AdjustStacking(&child, &target, &direction)) 1105 return; 1106 1107 const size_t child_i = 1108 std::find(children_.begin(), children_.end(), child) - children_.begin(); 1109 const size_t target_i = 1110 std::find(children_.begin(), children_.end(), target) - children_.begin(); 1111 1112 // Don't move the child if it is already in the right place. 1113 if ((direction == STACK_ABOVE && child_i == target_i + 1) || 1114 (direction == STACK_BELOW && child_i + 1 == target_i)) 1115 return; 1116 1117 const size_t dest_i = 1118 direction == STACK_ABOVE ? 1119 (child_i < target_i ? target_i : target_i + 1) : 1120 (child_i < target_i ? target_i - 1 : target_i); 1121 children_.erase(children_.begin() + child_i); 1122 children_.insert(children_.begin() + dest_i, child); 1123 1124 StackChildLayerRelativeTo(child, target, direction); 1125 1126 child->OnStackingChanged(); 1127 } 1128 1129 void Window::StackChildLayerRelativeTo(Window* child, 1130 Window* target, 1131 StackDirection direction) { 1132 Window* ancestor_with_layer = GetAncestorWithLayer(NULL); 1133 ui::Layer* ancestor_layer = 1134 ancestor_with_layer ? ancestor_with_layer->layer() : NULL; 1135 if (!ancestor_layer) 1136 return; 1137 1138 if (child->layer() && target->layer()) { 1139 if (direction == STACK_ABOVE) 1140 ancestor_layer->StackAbove(child->layer(), target->layer()); 1141 else 1142 ancestor_layer->StackBelow(child->layer(), target->layer()); 1143 return; 1144 } 1145 typedef std::vector<ui::Layer*> Layers; 1146 Layers layers; 1147 GetLayersToStack(child, &layers); 1148 if (layers.empty()) 1149 return; 1150 1151 ui::Layer* target_layer; 1152 if (direction == STACK_ABOVE) { 1153 target_layer = 1154 FindStackingTargetLayer<Windows::const_reverse_iterator>(target, child); 1155 } else { 1156 target_layer = 1157 FindStackingTargetLayer<Windows::const_iterator>(target, child); 1158 } 1159 1160 if (!target_layer) { 1161 if (direction == STACK_ABOVE) { 1162 for (Layers::const_reverse_iterator i = layers.rbegin(), 1163 rend = layers.rend(); i != rend; ++i) { 1164 ancestor_layer->StackAtBottom(*i); 1165 } 1166 } else { 1167 for (Layers::const_iterator i = layers.begin(); i != layers.end(); ++i) 1168 ancestor_layer->StackAtTop(*i); 1169 } 1170 return; 1171 } 1172 1173 if (direction == STACK_ABOVE) { 1174 for (Layers::const_reverse_iterator i = layers.rbegin(), 1175 rend = layers.rend(); i != rend; ++i) { 1176 ancestor_layer->StackAbove(*i, target_layer); 1177 } 1178 } else { 1179 for (Layers::const_iterator i = layers.begin(); i != layers.end(); ++i) 1180 ancestor_layer->StackBelow(*i, target_layer); 1181 } 1182 } 1183 1184 void Window::OnStackingChanged() { 1185 FOR_EACH_OBSERVER(WindowObserver, observers_, OnWindowStackingChanged(this)); 1186 } 1187 1188 void Window::NotifyRemovingFromRootWindow(Window* new_root) { 1189 FOR_EACH_OBSERVER(WindowObserver, observers_, 1190 OnWindowRemovingFromRootWindow(this, new_root)); 1191 for (Window::Windows::const_iterator it = children_.begin(); 1192 it != children_.end(); ++it) { 1193 (*it)->NotifyRemovingFromRootWindow(new_root); 1194 } 1195 } 1196 1197 void Window::NotifyAddedToRootWindow() { 1198 FOR_EACH_OBSERVER(WindowObserver, observers_, 1199 OnWindowAddedToRootWindow(this)); 1200 for (Window::Windows::const_iterator it = children_.begin(); 1201 it != children_.end(); ++it) { 1202 (*it)->NotifyAddedToRootWindow(); 1203 } 1204 } 1205 1206 void Window::NotifyWindowHierarchyChange( 1207 const WindowObserver::HierarchyChangeParams& params) { 1208 params.target->NotifyWindowHierarchyChangeDown(params); 1209 switch (params.phase) { 1210 case WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGING: 1211 if (params.old_parent) 1212 params.old_parent->NotifyWindowHierarchyChangeUp(params); 1213 break; 1214 case WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGED: 1215 if (params.new_parent) 1216 params.new_parent->NotifyWindowHierarchyChangeUp(params); 1217 break; 1218 default: 1219 NOTREACHED(); 1220 break; 1221 } 1222 } 1223 1224 void Window::NotifyWindowHierarchyChangeDown( 1225 const WindowObserver::HierarchyChangeParams& params) { 1226 NotifyWindowHierarchyChangeAtReceiver(params); 1227 for (Window::Windows::const_iterator it = children_.begin(); 1228 it != children_.end(); ++it) { 1229 (*it)->NotifyWindowHierarchyChangeDown(params); 1230 } 1231 } 1232 1233 void Window::NotifyWindowHierarchyChangeUp( 1234 const WindowObserver::HierarchyChangeParams& params) { 1235 for (Window* window = this; window; window = window->parent()) 1236 window->NotifyWindowHierarchyChangeAtReceiver(params); 1237 } 1238 1239 void Window::NotifyWindowHierarchyChangeAtReceiver( 1240 const WindowObserver::HierarchyChangeParams& params) { 1241 WindowObserver::HierarchyChangeParams local_params = params; 1242 local_params.receiver = this; 1243 1244 switch (params.phase) { 1245 case WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGING: 1246 FOR_EACH_OBSERVER(WindowObserver, observers_, 1247 OnWindowHierarchyChanging(local_params)); 1248 break; 1249 case WindowObserver::HierarchyChangeParams::HIERARCHY_CHANGED: 1250 FOR_EACH_OBSERVER(WindowObserver, observers_, 1251 OnWindowHierarchyChanged(local_params)); 1252 break; 1253 default: 1254 NOTREACHED(); 1255 break; 1256 } 1257 } 1258 1259 void Window::NotifyWindowVisibilityChanged(aura::Window* target, 1260 bool visible) { 1261 if (!NotifyWindowVisibilityChangedDown(target, visible)) { 1262 return; // |this| has been deleted. 1263 } 1264 NotifyWindowVisibilityChangedUp(target, visible); 1265 } 1266 1267 bool Window::NotifyWindowVisibilityChangedAtReceiver(aura::Window* target, 1268 bool visible) { 1269 // |this| may be deleted during a call to OnWindowVisibilityChanged() on one 1270 // of the observers. We create an local observer for that. In that case we 1271 // exit without further access to any members. 1272 WindowTracker tracker; 1273 tracker.Add(this); 1274 FOR_EACH_OBSERVER(WindowObserver, observers_, 1275 OnWindowVisibilityChanged(target, visible)); 1276 return tracker.Contains(this); 1277 } 1278 1279 bool Window::NotifyWindowVisibilityChangedDown(aura::Window* target, 1280 bool visible) { 1281 if (!NotifyWindowVisibilityChangedAtReceiver(target, visible)) 1282 return false; // |this| was deleted. 1283 std::set<const Window*> child_already_processed; 1284 bool child_destroyed = false; 1285 do { 1286 child_destroyed = false; 1287 for (Window::Windows::const_iterator it = children_.begin(); 1288 it != children_.end(); ++it) { 1289 if (!child_already_processed.insert(*it).second) 1290 continue; 1291 if (!(*it)->NotifyWindowVisibilityChangedDown(target, visible)) { 1292 // |*it| was deleted, |it| is invalid and |children_| has changed. 1293 // We exit the current for-loop and enter a new one. 1294 child_destroyed = true; 1295 break; 1296 } 1297 } 1298 } while (child_destroyed); 1299 return true; 1300 } 1301 1302 void Window::NotifyWindowVisibilityChangedUp(aura::Window* target, 1303 bool visible) { 1304 for (Window* window = this; window; window = window->parent()) { 1305 bool ret = window->NotifyWindowVisibilityChangedAtReceiver(target, visible); 1306 DCHECK(ret); 1307 } 1308 } 1309 1310 void Window::OnWindowBoundsChanged(const gfx::Rect& old_bounds) { 1311 if (layer()) { 1312 bounds_ = layer()->bounds(); 1313 if (parent_ && !parent_->layer()) { 1314 gfx::Vector2d offset; 1315 aura::Window* ancestor_with_layer = 1316 parent_->GetAncestorWithLayer(&offset); 1317 if (ancestor_with_layer) 1318 bounds_.Offset(-offset); 1319 } 1320 } 1321 1322 if (layout_manager_) 1323 layout_manager_->OnWindowResized(); 1324 if (delegate_) 1325 delegate_->OnBoundsChanged(old_bounds, bounds()); 1326 FOR_EACH_OBSERVER(WindowObserver, 1327 observers_, 1328 OnWindowBoundsChanged(this, old_bounds, bounds())); 1329 } 1330 1331 bool Window::CleanupGestureState() { 1332 bool state_modified = false; 1333 state_modified |= ui::GestureRecognizer::Get()->CancelActiveTouches(this); 1334 state_modified |= 1335 ui::GestureRecognizer::Get()->CleanupStateForConsumer(this); 1336 for (Window::Windows::iterator iter = children_.begin(); 1337 iter != children_.end(); 1338 ++iter) { 1339 state_modified |= (*iter)->CleanupGestureState(); 1340 } 1341 return state_modified; 1342 } 1343 1344 void Window::OnPaintLayer(gfx::Canvas* canvas) { 1345 Paint(canvas); 1346 } 1347 1348 base::Closure Window::PrepareForLayerBoundsChange() { 1349 return base::Bind(&Window::OnWindowBoundsChanged, base::Unretained(this), 1350 bounds()); 1351 } 1352 1353 bool Window::CanAcceptEvent(const ui::Event& event) { 1354 // The client may forbid certain windows from receiving events at a given 1355 // point in time. 1356 client::EventClient* client = client::GetEventClient(GetRootWindow()); 1357 if (client && !client->CanProcessEventsWithinSubtree(this)) 1358 return false; 1359 1360 // We need to make sure that a touch cancel event and any gesture events it 1361 // creates can always reach the window. This ensures that we receive a valid 1362 // touch / gesture stream. 1363 if (event.IsEndingEvent()) 1364 return true; 1365 1366 if (!IsVisible()) 1367 return false; 1368 1369 // The top-most window can always process an event. 1370 if (!parent_) 1371 return true; 1372 1373 // For located events (i.e. mouse, touch etc.), an assumption is made that 1374 // windows that don't have a default event-handler cannot process the event 1375 // (see more in GetWindowForPoint()). This assumption is not made for key 1376 // events. 1377 return event.IsKeyEvent() || target_handler(); 1378 } 1379 1380 ui::EventTarget* Window::GetParentTarget() { 1381 if (IsRootWindow()) { 1382 return client::GetEventClient(this) ? 1383 client::GetEventClient(this)->GetToplevelEventTarget() : 1384 Env::GetInstance(); 1385 } 1386 return parent_; 1387 } 1388 1389 scoped_ptr<ui::EventTargetIterator> Window::GetChildIterator() const { 1390 return scoped_ptr<ui::EventTargetIterator>( 1391 new ui::EventTargetIteratorImpl<Window>(children())); 1392 } 1393 1394 ui::EventTargeter* Window::GetEventTargeter() { 1395 return targeter_.get(); 1396 } 1397 1398 void Window::ConvertEventToTarget(ui::EventTarget* target, 1399 ui::LocatedEvent* event) { 1400 event->ConvertLocationToTarget(this, 1401 static_cast<Window*>(target)); 1402 } 1403 1404 void Window::UpdateLayerName() { 1405 #if !defined(NDEBUG) 1406 DCHECK(layer()); 1407 1408 std::string layer_name(name_); 1409 if (layer_name.empty()) 1410 layer_name = "Unnamed Window"; 1411 1412 if (id_ != -1) 1413 layer_name += " " + base::IntToString(id_); 1414 1415 layer()->set_name(layer_name); 1416 #endif 1417 } 1418 1419 bool Window::ContainsMouse() { 1420 bool contains_mouse = false; 1421 if (IsVisible()) { 1422 WindowTreeHost* host = GetHost(); 1423 contains_mouse = host && 1424 ContainsPointInRoot(host->dispatcher()->GetLastMouseLocationInRoot()); 1425 } 1426 return contains_mouse; 1427 } 1428 1429 const Window* Window::GetAncestorWithLayer(gfx::Vector2d* offset) const { 1430 for (const aura::Window* window = this; window; window = window->parent()) { 1431 if (window->layer()) 1432 return window; 1433 if (offset) 1434 *offset += window->bounds().OffsetFromOrigin(); 1435 } 1436 if (offset) 1437 *offset = gfx::Vector2d(); 1438 return NULL; 1439 } 1440 1441 } // namespace aura 1442