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| 1 // Copyright 2014 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 "view_manager/cpp/view.h" | |
| 6 | |
| 7 #include <set> | |
| 8 #include <string> | |
| 9 | |
| 10 #include "mojo/public/cpp/application/service_provider_impl.h" | |
| 11 #include "view_manager/cpp/lib/view_manager_client_impl.h" | |
| 12 #include "view_manager/cpp/lib/view_private.h" | |
| 13 #include "view_manager/cpp/view_observer.h" | |
| 14 #include "view_manager/cpp/view_tracker.h" | |
| 15 | |
| 16 namespace mojo { | |
| 17 | |
| 18 namespace { | |
| 19 | |
| 20 void NotifyViewTreeChangeAtReceiver( | |
| 21 View* receiver, | |
| 22 const ViewObserver::TreeChangeParams& params, | |
| 23 bool change_applied) { | |
| 24 ViewObserver::TreeChangeParams local_params = params; | |
| 25 local_params.receiver = receiver; | |
| 26 if (change_applied) { | |
| 27 FOR_EACH_OBSERVER(ViewObserver, *ViewPrivate(receiver).observers(), | |
| 28 OnTreeChanged(local_params)); | |
| 29 } else { | |
| 30 FOR_EACH_OBSERVER(ViewObserver, *ViewPrivate(receiver).observers(), | |
| 31 OnTreeChanging(local_params)); | |
| 32 } | |
| 33 } | |
| 34 | |
| 35 void NotifyViewTreeChangeUp(View* start_at, | |
| 36 const ViewObserver::TreeChangeParams& params, | |
| 37 bool change_applied) { | |
| 38 for (View* current = start_at; current; current = current->parent()) | |
| 39 NotifyViewTreeChangeAtReceiver(current, params, change_applied); | |
| 40 } | |
| 41 | |
| 42 void NotifyViewTreeChangeDown(View* start_at, | |
| 43 const ViewObserver::TreeChangeParams& params, | |
| 44 bool change_applied) { | |
| 45 NotifyViewTreeChangeAtReceiver(start_at, params, change_applied); | |
| 46 View::Children::const_iterator it = start_at->children().begin(); | |
| 47 for (; it != start_at->children().end(); ++it) | |
| 48 NotifyViewTreeChangeDown(*it, params, change_applied); | |
| 49 } | |
| 50 | |
| 51 void NotifyViewTreeChange(const ViewObserver::TreeChangeParams& params, | |
| 52 bool change_applied) { | |
| 53 NotifyViewTreeChangeDown(params.target, params, change_applied); | |
| 54 if (params.old_parent) | |
| 55 NotifyViewTreeChangeUp(params.old_parent, params, change_applied); | |
| 56 if (params.new_parent) | |
| 57 NotifyViewTreeChangeUp(params.new_parent, params, change_applied); | |
| 58 } | |
| 59 | |
| 60 class ScopedTreeNotifier { | |
| 61 public: | |
| 62 ScopedTreeNotifier(View* target, View* old_parent, View* new_parent) { | |
| 63 params_.target = target; | |
| 64 params_.old_parent = old_parent; | |
| 65 params_.new_parent = new_parent; | |
| 66 NotifyViewTreeChange(params_, false); | |
| 67 } | |
| 68 ~ScopedTreeNotifier() { NotifyViewTreeChange(params_, true); } | |
| 69 | |
| 70 private: | |
| 71 ViewObserver::TreeChangeParams params_; | |
| 72 | |
| 73 MOJO_DISALLOW_COPY_AND_ASSIGN(ScopedTreeNotifier); | |
| 74 }; | |
| 75 | |
| 76 void RemoveChildImpl(View* child, View::Children* children) { | |
| 77 View::Children::iterator it = | |
| 78 std::find(children->begin(), children->end(), child); | |
| 79 if (it != children->end()) { | |
| 80 children->erase(it); | |
| 81 ViewPrivate(child).ClearParent(); | |
| 82 } | |
| 83 } | |
| 84 | |
| 85 class ScopedOrderChangedNotifier { | |
| 86 public: | |
| 87 ScopedOrderChangedNotifier(View* view, | |
| 88 View* relative_view, | |
| 89 OrderDirection direction) | |
| 90 : view_(view), relative_view_(relative_view), direction_(direction) { | |
| 91 FOR_EACH_OBSERVER(ViewObserver, *ViewPrivate(view_).observers(), | |
| 92 OnViewReordering(view_, relative_view_, direction_)); | |
| 93 } | |
| 94 ~ScopedOrderChangedNotifier() { | |
| 95 FOR_EACH_OBSERVER(ViewObserver, *ViewPrivate(view_).observers(), | |
| 96 OnViewReordered(view_, relative_view_, direction_)); | |
| 97 } | |
| 98 | |
| 99 private: | |
| 100 View* view_; | |
| 101 View* relative_view_; | |
| 102 OrderDirection direction_; | |
| 103 | |
| 104 MOJO_DISALLOW_COPY_AND_ASSIGN(ScopedOrderChangedNotifier); | |
| 105 }; | |
| 106 | |
| 107 // Returns true if the order actually changed. | |
| 108 bool ReorderImpl(View::Children* children, | |
| 109 View* view, | |
| 110 View* relative, | |
| 111 OrderDirection direction) { | |
| 112 DCHECK(relative); | |
| 113 DCHECK_NE(view, relative); | |
| 114 DCHECK_EQ(view->parent(), relative->parent()); | |
| 115 | |
| 116 const size_t child_i = | |
| 117 std::find(children->begin(), children->end(), view) - children->begin(); | |
| 118 const size_t target_i = | |
| 119 std::find(children->begin(), children->end(), relative) - | |
| 120 children->begin(); | |
| 121 if ((direction == OrderDirection::ABOVE && child_i == target_i + 1) || | |
| 122 (direction == OrderDirection::BELOW && child_i + 1 == target_i)) { | |
| 123 return false; | |
| 124 } | |
| 125 | |
| 126 ScopedOrderChangedNotifier notifier(view, relative, direction); | |
| 127 | |
| 128 const size_t dest_i = direction == OrderDirection::ABOVE | |
| 129 ? (child_i < target_i ? target_i : target_i + 1) | |
| 130 : (child_i < target_i ? target_i - 1 : target_i); | |
| 131 children->erase(children->begin() + child_i); | |
| 132 children->insert(children->begin() + dest_i, view); | |
| 133 | |
| 134 return true; | |
| 135 } | |
| 136 | |
| 137 class ScopedSetBoundsNotifier { | |
| 138 public: | |
| 139 ScopedSetBoundsNotifier(View* view, | |
| 140 const Rect& old_bounds, | |
| 141 const Rect& new_bounds) | |
| 142 : view_(view), old_bounds_(old_bounds), new_bounds_(new_bounds) { | |
| 143 FOR_EACH_OBSERVER(ViewObserver, *ViewPrivate(view_).observers(), | |
| 144 OnViewBoundsChanging(view_, old_bounds_, new_bounds_)); | |
| 145 } | |
| 146 ~ScopedSetBoundsNotifier() { | |
| 147 FOR_EACH_OBSERVER(ViewObserver, *ViewPrivate(view_).observers(), | |
| 148 OnViewBoundsChanged(view_, old_bounds_, new_bounds_)); | |
| 149 } | |
| 150 | |
| 151 private: | |
| 152 View* view_; | |
| 153 const Rect old_bounds_; | |
| 154 const Rect new_bounds_; | |
| 155 | |
| 156 MOJO_DISALLOW_COPY_AND_ASSIGN(ScopedSetBoundsNotifier); | |
| 157 }; | |
| 158 | |
| 159 // Some operations are only permitted in the connection that created the view. | |
| 160 bool OwnsView(ViewManager* manager, View* view) { | |
| 161 return !manager || | |
| 162 static_cast<ViewManagerClientImpl*>(manager)->OwnsView(view->id()); | |
| 163 } | |
| 164 | |
| 165 } // namespace | |
| 166 | |
| 167 //////////////////////////////////////////////////////////////////////////////// | |
| 168 // View, public: | |
| 169 | |
| 170 void View::Destroy() { | |
| 171 if (!OwnsView(manager_, this)) | |
| 172 return; | |
| 173 | |
| 174 if (manager_) | |
| 175 static_cast<ViewManagerClientImpl*>(manager_)->DestroyView(id_); | |
| 176 while (!children_.empty()) { | |
| 177 View* child = children_.front(); | |
| 178 if (!OwnsView(manager_, child)) { | |
| 179 ViewPrivate(child).ClearParent(); | |
| 180 children_.erase(children_.begin()); | |
| 181 } else { | |
| 182 child->Destroy(); | |
| 183 DCHECK(std::find(children_.begin(), children_.end(), child) == | |
| 184 children_.end()); | |
| 185 } | |
| 186 } | |
| 187 LocalDestroy(); | |
| 188 } | |
| 189 | |
| 190 void View::SetBounds(const Rect& bounds) { | |
| 191 if (!OwnsView(manager_, this)) | |
| 192 return; | |
| 193 | |
| 194 if (bounds_.Equals(bounds)) | |
| 195 return; | |
| 196 | |
| 197 if (manager_) | |
| 198 static_cast<ViewManagerClientImpl*>(manager_)->SetBounds(id_, bounds); | |
| 199 LocalSetBounds(bounds_, bounds); | |
| 200 } | |
| 201 | |
| 202 void View::SetVisible(bool value) { | |
| 203 if (visible_ == value) | |
| 204 return; | |
| 205 | |
| 206 if (manager_) | |
| 207 static_cast<ViewManagerClientImpl*>(manager_)->SetVisible(id_, value); | |
| 208 LocalSetVisible(value); | |
| 209 } | |
| 210 | |
| 211 void View::SetSharedProperty(const std::string& name, | |
| 212 const std::vector<uint8_t>* value) { | |
| 213 std::vector<uint8_t> old_value; | |
| 214 std::vector<uint8_t>* old_value_ptr = nullptr; | |
| 215 auto it = properties_.find(name); | |
| 216 if (it != properties_.end()) { | |
| 217 old_value = it->second; | |
| 218 old_value_ptr = &old_value; | |
| 219 | |
| 220 if (value && old_value == *value) | |
| 221 return; | |
| 222 } else if (!value) { | |
| 223 // This property isn't set in |properties_| and |value| is NULL, so there's | |
| 224 // no change. | |
| 225 return; | |
| 226 } | |
| 227 | |
| 228 if (value) { | |
| 229 properties_[name] = *value; | |
| 230 } else if (it != properties_.end()) { | |
| 231 properties_.erase(it); | |
| 232 } | |
| 233 | |
| 234 // TODO: add test coverage of this (450303). | |
| 235 if (manager_) { | |
| 236 Array<uint8_t> transport_value; | |
| 237 if (value) { | |
| 238 transport_value.resize(value->size()); | |
| 239 if (value->size()) | |
| 240 memcpy(&transport_value.front(), &(value->front()), value->size()); | |
| 241 } | |
| 242 static_cast<ViewManagerClientImpl*>(manager_) | |
| 243 ->SetProperty(id_, name, transport_value.Pass()); | |
| 244 } | |
| 245 | |
| 246 FOR_EACH_OBSERVER( | |
| 247 ViewObserver, observers_, | |
| 248 OnViewSharedPropertyChanged(this, name, old_value_ptr, value)); | |
| 249 } | |
| 250 | |
| 251 bool View::IsDrawn() const { | |
| 252 if (!visible_) | |
| 253 return false; | |
| 254 return parent_ ? parent_->IsDrawn() : drawn_; | |
| 255 } | |
| 256 | |
| 257 void View::AddObserver(ViewObserver* observer) { | |
| 258 observers_.AddObserver(observer); | |
| 259 } | |
| 260 | |
| 261 void View::RemoveObserver(ViewObserver* observer) { | |
| 262 observers_.RemoveObserver(observer); | |
| 263 } | |
| 264 | |
| 265 const View* View::GetRoot() const { | |
| 266 const View* root = this; | |
| 267 for (const View* parent = this; parent; parent = parent->parent()) | |
| 268 root = parent; | |
| 269 return root; | |
| 270 } | |
| 271 | |
| 272 void View::AddChild(View* child) { | |
| 273 // TODO(beng): not necessarily valid to all connections, but possibly to the | |
| 274 // embeddee in an embedder-embeddee relationship. | |
| 275 if (manager_) | |
| 276 CHECK_EQ(child->view_manager(), manager_); | |
| 277 LocalAddChild(child); | |
| 278 if (manager_) | |
| 279 static_cast<ViewManagerClientImpl*>(manager_)->AddChild(child->id(), id_); | |
| 280 } | |
| 281 | |
| 282 void View::RemoveChild(View* child) { | |
| 283 // TODO(beng): not necessarily valid to all connections, but possibly to the | |
| 284 // embeddee in an embedder-embeddee relationship. | |
| 285 if (manager_) | |
| 286 CHECK_EQ(child->view_manager(), manager_); | |
| 287 LocalRemoveChild(child); | |
| 288 if (manager_) { | |
| 289 static_cast<ViewManagerClientImpl*>(manager_) | |
| 290 ->RemoveChild(child->id(), id_); | |
| 291 } | |
| 292 } | |
| 293 | |
| 294 void View::MoveToFront() { | |
| 295 if (!parent_ || parent_->children_.back() == this) | |
| 296 return; | |
| 297 Reorder(parent_->children_.back(), OrderDirection::ABOVE); | |
| 298 } | |
| 299 | |
| 300 void View::MoveToBack() { | |
| 301 if (!parent_ || parent_->children_.front() == this) | |
| 302 return; | |
| 303 Reorder(parent_->children_.front(), OrderDirection::BELOW); | |
| 304 } | |
| 305 | |
| 306 void View::Reorder(View* relative, OrderDirection direction) { | |
| 307 if (!LocalReorder(relative, direction)) | |
| 308 return; | |
| 309 if (manager_) { | |
| 310 static_cast<ViewManagerClientImpl*>(manager_) | |
| 311 ->Reorder(id_, relative->id(), direction); | |
| 312 } | |
| 313 } | |
| 314 | |
| 315 bool View::Contains(View* child) const { | |
| 316 if (!child) | |
| 317 return false; | |
| 318 if (child == this) | |
| 319 return true; | |
| 320 if (manager_) | |
| 321 CHECK_EQ(child->view_manager(), manager_); | |
| 322 for (View* p = child->parent(); p; p = p->parent()) { | |
| 323 if (p == this) | |
| 324 return true; | |
| 325 } | |
| 326 return false; | |
| 327 } | |
| 328 | |
| 329 View* View::GetChildById(Id id) { | |
| 330 if (id == id_) | |
| 331 return this; | |
| 332 // TODO(beng): this could be improved depending on how we decide to own views. | |
| 333 Children::const_iterator it = children_.begin(); | |
| 334 for (; it != children_.end(); ++it) { | |
| 335 View* view = (*it)->GetChildById(id); | |
| 336 if (view) | |
| 337 return view; | |
| 338 } | |
| 339 return NULL; | |
| 340 } | |
| 341 | |
| 342 void View::SetSurfaceId(SurfaceIdPtr id) { | |
| 343 if (manager_) { | |
| 344 static_cast<ViewManagerClientImpl*>(manager_)->SetSurfaceId(id_, id.Pass()); | |
| 345 } | |
| 346 } | |
| 347 | |
| 348 void View::SetFocus() { | |
| 349 if (manager_) | |
| 350 static_cast<ViewManagerClientImpl*>(manager_)->SetFocus(id_); | |
| 351 } | |
| 352 | |
| 353 void View::Embed(const String& url) { | |
| 354 if (PrepareForEmbed()) | |
| 355 static_cast<ViewManagerClientImpl*>(manager_)->Embed(url, id_); | |
| 356 } | |
| 357 | |
| 358 void View::Embed(const String& url, | |
| 359 InterfaceRequest<ServiceProvider> services, | |
| 360 ServiceProviderPtr exposed_services) { | |
| 361 if (PrepareForEmbed()) { | |
| 362 static_cast<ViewManagerClientImpl*>(manager_) | |
| 363 ->Embed(url, id_, services.Pass(), exposed_services.Pass()); | |
| 364 } | |
| 365 } | |
| 366 | |
| 367 void View::Embed(ViewManagerClientPtr client) { | |
| 368 if (PrepareForEmbed()) | |
| 369 static_cast<ViewManagerClientImpl*>(manager_)->Embed(id_, client.Pass()); | |
| 370 } | |
| 371 | |
| 372 //////////////////////////////////////////////////////////////////////////////// | |
| 373 // View, protected: | |
| 374 | |
| 375 namespace { | |
| 376 | |
| 377 ViewportMetricsPtr CreateEmptyViewportMetrics() { | |
| 378 ViewportMetricsPtr metrics = ViewportMetrics::New(); | |
| 379 metrics->size = Size::New(); | |
| 380 return metrics; | |
| 381 } | |
| 382 | |
| 383 } // namespace | |
| 384 | |
| 385 View::View() | |
| 386 : manager_(NULL), | |
| 387 id_(static_cast<Id>(-1)), | |
| 388 parent_(NULL), | |
| 389 viewport_metrics_(CreateEmptyViewportMetrics()), | |
| 390 visible_(true), | |
| 391 drawn_(false) {} | |
| 392 | |
| 393 View::~View() { | |
| 394 FOR_EACH_OBSERVER(ViewObserver, observers_, OnViewDestroying(this)); | |
| 395 if (parent_) | |
| 396 parent_->LocalRemoveChild(this); | |
| 397 | |
| 398 // We may still have children. This can happen if the embedder destroys the | |
| 399 // root while we're still alive. | |
| 400 while (!children_.empty()) { | |
| 401 View* child = children_.front(); | |
| 402 LocalRemoveChild(child); | |
| 403 DCHECK(children_.empty() || children_.front() != child); | |
| 404 } | |
| 405 | |
| 406 // TODO(beng): It'd be better to do this via a destruction observer in the | |
| 407 // ViewManagerClientImpl. | |
| 408 if (manager_) | |
| 409 static_cast<ViewManagerClientImpl*>(manager_)->RemoveView(id_); | |
| 410 | |
| 411 // Clear properties. | |
| 412 for (auto& pair : prop_map_) { | |
| 413 if (pair.second.deallocator) | |
| 414 (*pair.second.deallocator)(pair.second.value); | |
| 415 } | |
| 416 prop_map_.clear(); | |
| 417 | |
| 418 FOR_EACH_OBSERVER(ViewObserver, observers_, OnViewDestroyed(this)); | |
| 419 } | |
| 420 | |
| 421 //////////////////////////////////////////////////////////////////////////////// | |
| 422 // View, private: | |
| 423 | |
| 424 View::View(ViewManager* manager, Id id) | |
| 425 : manager_(manager), | |
| 426 id_(id), | |
| 427 parent_(nullptr), | |
| 428 viewport_metrics_(CreateEmptyViewportMetrics()), | |
| 429 visible_(false), | |
| 430 drawn_(false) {} | |
| 431 | |
| 432 int64 View::SetLocalPropertyInternal(const void* key, | |
| 433 const char* name, | |
| 434 PropertyDeallocator deallocator, | |
| 435 int64 value, | |
| 436 int64 default_value) { | |
| 437 int64 old = GetLocalPropertyInternal(key, default_value); | |
| 438 if (value == default_value) { | |
| 439 prop_map_.erase(key); | |
| 440 } else { | |
| 441 Value prop_value; | |
| 442 prop_value.name = name; | |
| 443 prop_value.value = value; | |
| 444 prop_value.deallocator = deallocator; | |
| 445 prop_map_[key] = prop_value; | |
| 446 } | |
| 447 FOR_EACH_OBSERVER(ViewObserver, observers_, | |
| 448 OnViewLocalPropertyChanged(this, key, old)); | |
| 449 return old; | |
| 450 } | |
| 451 | |
| 452 int64 View::GetLocalPropertyInternal(const void* key, | |
| 453 int64 default_value) const { | |
| 454 std::map<const void*, Value>::const_iterator iter = prop_map_.find(key); | |
| 455 if (iter == prop_map_.end()) | |
| 456 return default_value; | |
| 457 return iter->second.value; | |
| 458 } | |
| 459 | |
| 460 void View::LocalDestroy() { | |
| 461 delete this; | |
| 462 } | |
| 463 | |
| 464 void View::LocalAddChild(View* child) { | |
| 465 ScopedTreeNotifier notifier(child, child->parent(), this); | |
| 466 if (child->parent()) | |
| 467 RemoveChildImpl(child, &child->parent_->children_); | |
| 468 children_.push_back(child); | |
| 469 child->parent_ = this; | |
| 470 } | |
| 471 | |
| 472 void View::LocalRemoveChild(View* child) { | |
| 473 DCHECK_EQ(this, child->parent()); | |
| 474 ScopedTreeNotifier notifier(child, this, NULL); | |
| 475 RemoveChildImpl(child, &children_); | |
| 476 } | |
| 477 | |
| 478 bool View::LocalReorder(View* relative, OrderDirection direction) { | |
| 479 return ReorderImpl(&parent_->children_, this, relative, direction); | |
| 480 } | |
| 481 | |
| 482 void View::LocalSetBounds(const Rect& old_bounds, const Rect& new_bounds) { | |
| 483 DCHECK(old_bounds.x == bounds_.x); | |
| 484 DCHECK(old_bounds.y == bounds_.y); | |
| 485 DCHECK(old_bounds.width == bounds_.width); | |
| 486 DCHECK(old_bounds.height == bounds_.height); | |
| 487 ScopedSetBoundsNotifier notifier(this, old_bounds, new_bounds); | |
| 488 bounds_ = new_bounds; | |
| 489 } | |
| 490 | |
| 491 void View::LocalSetViewportMetrics(const ViewportMetrics& old_metrics, | |
| 492 const ViewportMetrics& new_metrics) { | |
| 493 // TODO(eseidel): We could check old_metrics against viewport_metrics_. | |
| 494 viewport_metrics_ = new_metrics.Clone(); | |
| 495 FOR_EACH_OBSERVER( | |
| 496 ViewObserver, observers_, | |
| 497 OnViewViewportMetricsChanged(this, old_metrics, new_metrics)); | |
| 498 } | |
| 499 | |
| 500 void View::LocalSetDrawn(bool value) { | |
| 501 if (drawn_ == value) | |
| 502 return; | |
| 503 | |
| 504 // As IsDrawn() is derived from |visible_| and |drawn_|, only send drawn | |
| 505 // notification is the value of IsDrawn() is really changing. | |
| 506 if (IsDrawn() == value) { | |
| 507 drawn_ = value; | |
| 508 return; | |
| 509 } | |
| 510 FOR_EACH_OBSERVER(ViewObserver, observers_, OnViewDrawnChanging(this)); | |
| 511 drawn_ = value; | |
| 512 FOR_EACH_OBSERVER(ViewObserver, observers_, OnViewDrawnChanged(this)); | |
| 513 } | |
| 514 | |
| 515 void View::LocalSetVisible(bool visible) { | |
| 516 if (visible_ == visible) | |
| 517 return; | |
| 518 | |
| 519 FOR_EACH_OBSERVER(ViewObserver, observers_, OnViewVisibilityChanging(this)); | |
| 520 visible_ = visible; | |
| 521 NotifyViewVisibilityChanged(this); | |
| 522 } | |
| 523 | |
| 524 void View::NotifyViewVisibilityChanged(View* target) { | |
| 525 if (!NotifyViewVisibilityChangedDown(target)) { | |
| 526 return; // |this| has been deleted. | |
| 527 } | |
| 528 NotifyViewVisibilityChangedUp(target); | |
| 529 } | |
| 530 | |
| 531 bool View::NotifyViewVisibilityChangedAtReceiver(View* target) { | |
| 532 // |this| may be deleted during a call to OnViewVisibilityChanged() on one | |
| 533 // of the observers. We create an local observer for that. In that case we | |
| 534 // exit without further access to any members. | |
| 535 ViewTracker tracker; | |
| 536 tracker.Add(this); | |
| 537 FOR_EACH_OBSERVER(ViewObserver, observers_, OnViewVisibilityChanged(target)); | |
| 538 return tracker.Contains(this); | |
| 539 } | |
| 540 | |
| 541 bool View::NotifyViewVisibilityChangedDown(View* target) { | |
| 542 if (!NotifyViewVisibilityChangedAtReceiver(target)) | |
| 543 return false; // |this| was deleted. | |
| 544 std::set<const View*> child_already_processed; | |
| 545 bool child_destroyed = false; | |
| 546 do { | |
| 547 child_destroyed = false; | |
| 548 for (View::Children::const_iterator it = children_.begin(); | |
| 549 it != children_.end(); ++it) { | |
| 550 if (!child_already_processed.insert(*it).second) | |
| 551 continue; | |
| 552 if (!(*it)->NotifyViewVisibilityChangedDown(target)) { | |
| 553 // |*it| was deleted, |it| is invalid and |children_| has changed. We | |
| 554 // exit the current for-loop and enter a new one. | |
| 555 child_destroyed = true; | |
| 556 break; | |
| 557 } | |
| 558 } | |
| 559 } while (child_destroyed); | |
| 560 return true; | |
| 561 } | |
| 562 | |
| 563 void View::NotifyViewVisibilityChangedUp(View* target) { | |
| 564 // Start with the parent as we already notified |this| | |
| 565 // in NotifyViewVisibilityChangedDown. | |
| 566 for (View* view = parent(); view; view = view->parent()) { | |
| 567 bool ret = view->NotifyViewVisibilityChangedAtReceiver(target); | |
| 568 DCHECK(ret); | |
| 569 } | |
| 570 } | |
| 571 | |
| 572 bool View::PrepareForEmbed() { | |
| 573 if (!OwnsView(manager_, this)) | |
| 574 return false; | |
| 575 | |
| 576 while (!children_.empty()) | |
| 577 RemoveChild(children_[0]); | |
| 578 return true; | |
| 579 } | |
| 580 | |
| 581 } // namespace mojo | |
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Chromium Code Reviews
Issue 1531403003:
Delete the ViewManager and WindowManager services. (Closed)
Base URL: git@github.com:domokit/mojo.git@moz-3