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| 1 // Copyright 2015 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 import 'dart:async'; | |
| 6 import 'dart:collection'; | |
| 7 import 'dart:mirrors'; | |
| 8 import 'dart:sky' as sky; | |
| 9 | |
| 10 import '../app/view.dart'; | |
| 11 import '../rendering/box.dart'; | |
| 12 import '../rendering/object.dart'; | |
| 13 | |
| 14 export '../rendering/box.dart' show BoxConstraints, BoxDecoration, Border, Borde
rSide, EdgeDims; | |
| 15 export '../rendering/flex.dart' show FlexDirection; | |
| 16 export '../rendering/object.dart' show Point, Size, Rect, Color, Paint, Path; | |
| 17 | |
| 18 final bool _shouldLogRenderDuration = false; | |
| 19 | |
| 20 // All Effen nodes derive from UINode. All nodes have a _parent, a _key and | |
| 21 // can be sync'd. | |
| 22 abstract class UINode { | |
| 23 | |
| 24 UINode({ String key }) { | |
| 25 _key = key == null ? "$runtimeType" : "$runtimeType-$key"; | |
| 26 assert(this is AbstractUINodeRoot || _inRenderDirtyComponents); // you shoul
d not build the UI tree ahead of time, build it only during build() | |
| 27 } | |
| 28 | |
| 29 String _key; | |
| 30 String get key => _key; | |
| 31 | |
| 32 UINode _parent; | |
| 33 UINode get parent => _parent; | |
| 34 | |
| 35 bool _mounted = false; | |
| 36 bool _wasMounted = false; | |
| 37 bool get mounted => _mounted; | |
| 38 static bool _notifyingMountStatus = false; | |
| 39 static Set<UINode> _mountedChanged = new HashSet<UINode>(); | |
| 40 | |
| 41 void setParent(UINode newParent) { | |
| 42 assert(!_notifyingMountStatus); | |
| 43 _parent = newParent; | |
| 44 if (newParent == null) { | |
| 45 if (_mounted) { | |
| 46 _mounted = false; | |
| 47 _mountedChanged.add(this); | |
| 48 } | |
| 49 } else { | |
| 50 assert(newParent._mounted); | |
| 51 if (_parent._mounted != _mounted) { | |
| 52 _mounted = _parent._mounted; | |
| 53 _mountedChanged.add(this); | |
| 54 } | |
| 55 } | |
| 56 } | |
| 57 | |
| 58 static void _notifyMountStatusChanged() { | |
| 59 try { | |
| 60 _notifyingMountStatus = true; | |
| 61 for (UINode node in _mountedChanged) { | |
| 62 if (node._wasMounted != node._mounted) { | |
| 63 if (node._mounted) | |
| 64 node.didMount(); | |
| 65 else | |
| 66 node.didUnmount(); | |
| 67 node._wasMounted = node._mounted; | |
| 68 } | |
| 69 } | |
| 70 _mountedChanged.clear(); | |
| 71 } finally { | |
| 72 _notifyingMountStatus = false; | |
| 73 } | |
| 74 } | |
| 75 void didMount() { } | |
| 76 void didUnmount() { } | |
| 77 | |
| 78 RenderObject _root; | |
| 79 RenderObject get root => _root; | |
| 80 | |
| 81 // Subclasses which implements Nodes that become stateful may return true | |
| 82 // if the |old| node has become stateful and should be retained. | |
| 83 // This is called immediately before _sync(). | |
| 84 // Component._retainStatefulNodeIfPossible() calls syncFields(). | |
| 85 bool _retainStatefulNodeIfPossible(UINode old) => false; | |
| 86 | |
| 87 bool get interchangeable => false; // if true, then keys can be duplicated | |
| 88 | |
| 89 void _sync(UINode old, dynamic slot); | |
| 90 // 'slot' is the identifier that the parent RenderObjectWrapper uses to know | |
| 91 // where to put this descendant | |
| 92 | |
| 93 void remove() { | |
| 94 _root = null; | |
| 95 setParent(null); | |
| 96 } | |
| 97 | |
| 98 UINode findAncestor(Type targetType) { | |
| 99 var ancestor = _parent; | |
| 100 while (ancestor != null && !reflectClass(ancestor.runtimeType).isSubtypeOf(r
eflectClass(targetType))) | |
| 101 ancestor = ancestor._parent; | |
| 102 return ancestor; | |
| 103 } | |
| 104 | |
| 105 void removeChild(UINode node) { | |
| 106 node.remove(); | |
| 107 } | |
| 108 | |
| 109 // Returns the child which should be retained as the child of this node. | |
| 110 UINode syncChild(UINode node, UINode oldNode, dynamic slot) { | |
| 111 | |
| 112 assert(oldNode is! Component || !oldNode._disqualifiedFromEverAppearingAgain
); | |
| 113 | |
| 114 if (node == oldNode) { | |
| 115 assert(node == null || node.mounted); | |
| 116 return node; // Nothing to do. Subtrees must be identical. | |
| 117 } | |
| 118 | |
| 119 if (node == null) { | |
| 120 // the child in this slot has gone away | |
| 121 assert(oldNode.mounted); | |
| 122 removeChild(oldNode); | |
| 123 assert(!oldNode.mounted); | |
| 124 return null; | |
| 125 } | |
| 126 | |
| 127 if (oldNode != null && node._key == oldNode._key && node._retainStatefulNode
IfPossible(oldNode)) { | |
| 128 assert(oldNode.mounted); | |
| 129 assert(!node.mounted); | |
| 130 oldNode._sync(node, slot); | |
| 131 assert(oldNode.root is RenderObject); | |
| 132 return oldNode; | |
| 133 } | |
| 134 | |
| 135 if (oldNode != null && node._key != oldNode._key) { | |
| 136 assert(oldNode.mounted); | |
| 137 removeChild(oldNode); | |
| 138 oldNode = null; | |
| 139 } | |
| 140 | |
| 141 assert(!node.mounted); | |
| 142 node.setParent(this); | |
| 143 node._sync(oldNode, slot); | |
| 144 assert(node.root is RenderObject); | |
| 145 return node; | |
| 146 } | |
| 147 } | |
| 148 | |
| 149 | |
| 150 // Descendants of TagNode provide a way to tag RenderObjectWrapper and | |
| 151 // Component nodes with annotations, such as event listeners, | |
| 152 // stylistic information, etc. | |
| 153 abstract class TagNode extends UINode { | |
| 154 | |
| 155 TagNode(UINode content, { String key }) | |
| 156 : this.content = content, super(key: key); | |
| 157 | |
| 158 UINode content; | |
| 159 | |
| 160 void _sync(UINode old, dynamic slot) { | |
| 161 UINode oldContent = old == null ? null : (old as TagNode).content; | |
| 162 content = syncChild(content, oldContent, slot); | |
| 163 assert(content.root != null); | |
| 164 _root = content.root; | |
| 165 assert(_root == root); // in case a subclass reintroduces it | |
| 166 } | |
| 167 | |
| 168 void remove() { | |
| 169 if (content != null) | |
| 170 removeChild(content); | |
| 171 super.remove(); | |
| 172 } | |
| 173 | |
| 174 } | |
| 175 | |
| 176 class ParentDataNode extends TagNode { | |
| 177 ParentDataNode(UINode content, this.parentData, { String key }) | |
| 178 : super(content, key: key); | |
| 179 final ParentData parentData; | |
| 180 } | |
| 181 | |
| 182 typedef void GestureEventListener(sky.GestureEvent e); | |
| 183 typedef void PointerEventListener(sky.PointerEvent e); | |
| 184 typedef void EventListener(sky.Event e); | |
| 185 | |
| 186 class EventListenerNode extends TagNode { | |
| 187 | |
| 188 EventListenerNode(UINode content, { | |
| 189 EventListener onWheel, | |
| 190 GestureEventListener onGestureFlingCancel, | |
| 191 GestureEventListener onGestureFlingStart, | |
| 192 GestureEventListener onGestureScrollStart, | |
| 193 GestureEventListener onGestureScrollUpdate, | |
| 194 GestureEventListener onGestureTap, | |
| 195 GestureEventListener onGestureTapDown, | |
| 196 PointerEventListener onPointerCancel, | |
| 197 PointerEventListener onPointerDown, | |
| 198 PointerEventListener onPointerMove, | |
| 199 PointerEventListener onPointerUp, | |
| 200 Map<String, sky.EventListener> custom | |
| 201 }) : listeners = _createListeners( | |
| 202 onWheel: onWheel, | |
| 203 onGestureFlingCancel: onGestureFlingCancel, | |
| 204 onGestureFlingStart: onGestureFlingStart, | |
| 205 onGestureScrollUpdate: onGestureScrollUpdate, | |
| 206 onGestureScrollStart: onGestureScrollStart, | |
| 207 onGestureTap: onGestureTap, | |
| 208 onGestureTapDown: onGestureTapDown, | |
| 209 onPointerCancel: onPointerCancel, | |
| 210 onPointerDown: onPointerDown, | |
| 211 onPointerMove: onPointerMove, | |
| 212 onPointerUp: onPointerUp, | |
| 213 custom: custom | |
| 214 ), | |
| 215 super(content); | |
| 216 | |
| 217 final Map<String, sky.EventListener> listeners; | |
| 218 | |
| 219 static Map<String, sky.EventListener> _createListeners({ | |
| 220 EventListener onWheel, | |
| 221 GestureEventListener onGestureFlingCancel, | |
| 222 GestureEventListener onGestureFlingStart, | |
| 223 GestureEventListener onGestureScrollStart, | |
| 224 GestureEventListener onGestureScrollUpdate, | |
| 225 GestureEventListener onGestureTap, | |
| 226 GestureEventListener onGestureTapDown, | |
| 227 PointerEventListener onPointerCancel, | |
| 228 PointerEventListener onPointerDown, | |
| 229 PointerEventListener onPointerMove, | |
| 230 PointerEventListener onPointerUp, | |
| 231 Map<String, sky.EventListener> custom | |
| 232 }) { | |
| 233 var listeners = custom != null ? | |
| 234 new HashMap<String, sky.EventListener>.from(custom) : | |
| 235 new HashMap<String, sky.EventListener>(); | |
| 236 | |
| 237 if (onWheel != null) | |
| 238 listeners['wheel'] = onWheel; | |
| 239 if (onGestureFlingCancel != null) | |
| 240 listeners['gestureflingcancel'] = onGestureFlingCancel; | |
| 241 if (onGestureFlingStart != null) | |
| 242 listeners['gestureflingstart'] = onGestureFlingStart; | |
| 243 if (onGestureScrollStart != null) | |
| 244 listeners['gesturescrollstart'] = onGestureScrollStart; | |
| 245 if (onGestureScrollUpdate != null) | |
| 246 listeners['gesturescrollupdate'] = onGestureScrollUpdate; | |
| 247 if (onGestureTap != null) | |
| 248 listeners['gesturetap'] = onGestureTap; | |
| 249 if (onGestureTapDown != null) | |
| 250 listeners['gesturetapdown'] = onGestureTapDown; | |
| 251 if (onPointerCancel != null) | |
| 252 listeners['pointercancel'] = onPointerCancel; | |
| 253 if (onPointerDown != null) | |
| 254 listeners['pointerdown'] = onPointerDown; | |
| 255 if (onPointerMove != null) | |
| 256 listeners['pointermove'] = onPointerMove; | |
| 257 if (onPointerUp != null) | |
| 258 listeners['pointerup'] = onPointerUp; | |
| 259 | |
| 260 return listeners; | |
| 261 } | |
| 262 | |
| 263 void _handleEvent(sky.Event e) { | |
| 264 sky.EventListener listener = listeners[e.type]; | |
| 265 if (listener != null) { | |
| 266 listener(e); | |
| 267 } | |
| 268 } | |
| 269 | |
| 270 } | |
| 271 | |
| 272 | |
| 273 abstract class Component extends UINode { | |
| 274 | |
| 275 Component({ String key, bool stateful }) | |
| 276 : _stateful = stateful != null ? stateful : false, | |
| 277 _order = _currentOrder + 1, | |
| 278 super(key: key); | |
| 279 | |
| 280 static Component _currentlyBuilding; | |
| 281 bool get _isBuilding => _currentlyBuilding == this; | |
| 282 | |
| 283 bool _stateful; | |
| 284 bool _dirty = true; | |
| 285 bool _disqualifiedFromEverAppearingAgain = false; | |
| 286 | |
| 287 UINode _built; | |
| 288 dynamic _slot; // cached slot from the last time we were synced | |
| 289 | |
| 290 void didMount() { | |
| 291 assert(!_disqualifiedFromEverAppearingAgain); | |
| 292 super.didMount(); | |
| 293 } | |
| 294 | |
| 295 void remove() { | |
| 296 assert(_built != null); | |
| 297 assert(root != null); | |
| 298 removeChild(_built); | |
| 299 _built = null; | |
| 300 super.remove(); | |
| 301 } | |
| 302 | |
| 303 bool _retainStatefulNodeIfPossible(UINode old) { | |
| 304 assert(!_disqualifiedFromEverAppearingAgain); | |
| 305 | |
| 306 Component oldComponent = old as Component; | |
| 307 if (oldComponent == null || !oldComponent._stateful) | |
| 308 return false; | |
| 309 | |
| 310 assert(key == oldComponent.key); | |
| 311 | |
| 312 // Make |this|, the newly-created object, into the "old" Component, and kill
it | |
| 313 _stateful = false; | |
| 314 _built = oldComponent._built; | |
| 315 assert(_built != null); | |
| 316 _disqualifiedFromEverAppearingAgain = true; | |
| 317 | |
| 318 // Make |oldComponent| the "new" component | |
| 319 oldComponent._built = null; | |
| 320 oldComponent._dirty = true; | |
| 321 oldComponent.syncFields(this); | |
| 322 return true; | |
| 323 } | |
| 324 | |
| 325 // This is called by _retainStatefulNodeIfPossible(), during | |
| 326 // syncChild(), just before _sync() is called. | |
| 327 // This must be implemented on any subclass that can become stateful | |
| 328 // (but don't call super.syncFields() if you inherit directly from | |
| 329 // Component, since that'll fire an assert). | |
| 330 // If you don't ever become stateful, then don't override this. | |
| 331 void syncFields(Component source) { | |
| 332 assert(false); | |
| 333 } | |
| 334 | |
| 335 final int _order; | |
| 336 static int _currentOrder = 0; | |
| 337 | |
| 338 // There are three cases here: | |
| 339 // 1) Building for the first time: | |
| 340 // assert(_built == null && old == null) | |
| 341 // 2) Re-building (because a dirty flag got set): | |
| 342 // assert(_built != null && old == null) | |
| 343 // 3) Syncing against an old version | |
| 344 // assert(_built == null && old != null) | |
| 345 void _sync(UINode old, dynamic slot) { | |
| 346 assert(_built == null || old == null); | |
| 347 assert(!_disqualifiedFromEverAppearingAgain); | |
| 348 | |
| 349 Component oldComponent = old as Component; | |
| 350 | |
| 351 _slot = slot; | |
| 352 | |
| 353 var oldBuilt; | |
| 354 if (oldComponent == null) { | |
| 355 oldBuilt = _built; | |
| 356 } else { | |
| 357 assert(_built == null); | |
| 358 oldBuilt = oldComponent._built; | |
| 359 } | |
| 360 | |
| 361 int lastOrder = _currentOrder; | |
| 362 _currentOrder = _order; | |
| 363 _currentlyBuilding = this; | |
| 364 _built = build(); | |
| 365 assert(_built != null); | |
| 366 _currentlyBuilding = null; | |
| 367 _currentOrder = lastOrder; | |
| 368 | |
| 369 _built = syncChild(_built, oldBuilt, slot); | |
| 370 assert(_built != null); | |
| 371 _dirty = false; | |
| 372 _root = _built.root; | |
| 373 assert(_root == root); // in case a subclass reintroduces it | |
| 374 assert(root != null); | |
| 375 } | |
| 376 | |
| 377 void _buildIfDirty() { | |
| 378 assert(!_disqualifiedFromEverAppearingAgain); | |
| 379 if (!_dirty || !_mounted) | |
| 380 return; | |
| 381 | |
| 382 assert(root != null); | |
| 383 _sync(null, _slot); | |
| 384 } | |
| 385 | |
| 386 void scheduleBuild() { | |
| 387 setState(() {}); | |
| 388 } | |
| 389 | |
| 390 void setState(Function fn()) { | |
| 391 assert(!_disqualifiedFromEverAppearingAgain); | |
| 392 _stateful = true; | |
| 393 fn(); | |
| 394 if (_isBuilding || _dirty || !_mounted) | |
| 395 return; | |
| 396 | |
| 397 _dirty = true; | |
| 398 _scheduleComponentForRender(this); | |
| 399 } | |
| 400 | |
| 401 UINode build(); | |
| 402 | |
| 403 } | |
| 404 | |
| 405 Set<Component> _dirtyComponents = new Set<Component>(); | |
| 406 bool _buildScheduled = false; | |
| 407 bool _inRenderDirtyComponents = false; | |
| 408 | |
| 409 void _buildDirtyComponents() { | |
| 410 //_tracing.begin('fn::_buildDirtyComponents'); | |
| 411 | |
| 412 Stopwatch sw; | |
| 413 if (_shouldLogRenderDuration) | |
| 414 sw = new Stopwatch()..start(); | |
| 415 | |
| 416 try { | |
| 417 _inRenderDirtyComponents = true; | |
| 418 | |
| 419 List<Component> sortedDirtyComponents = _dirtyComponents.toList(); | |
| 420 sortedDirtyComponents.sort((Component a, Component b) => a._order - b._order
); | |
| 421 for (var comp in sortedDirtyComponents) { | |
| 422 comp._buildIfDirty(); | |
| 423 } | |
| 424 | |
| 425 _dirtyComponents.clear(); | |
| 426 _buildScheduled = false; | |
| 427 } finally { | |
| 428 _inRenderDirtyComponents = false; | |
| 429 } | |
| 430 | |
| 431 UINode._notifyMountStatusChanged(); | |
| 432 | |
| 433 if (_shouldLogRenderDuration) { | |
| 434 sw.stop(); | |
| 435 print('Render took ${sw.elapsedMicroseconds} microseconds'); | |
| 436 } | |
| 437 | |
| 438 //_tracing.end('fn::_buildDirtyComponents'); | |
| 439 } | |
| 440 | |
| 441 void _scheduleComponentForRender(Component c) { | |
| 442 assert(!_inRenderDirtyComponents); | |
| 443 _dirtyComponents.add(c); | |
| 444 | |
| 445 if (!_buildScheduled) { | |
| 446 _buildScheduled = true; | |
| 447 new Future.microtask(_buildDirtyComponents); | |
| 448 } | |
| 449 } | |
| 450 | |
| 451 | |
| 452 // RenderObjectWrappers correspond to a desired state of a RenderObject. | |
| 453 // They are fully immutable, with one exception: A UINode which is a | |
| 454 // Component which lives within an MultiChildRenderObjectWrapper's | |
| 455 // children list, may be replaced with the "old" instance if it has | |
| 456 // become stateful. | |
| 457 abstract class RenderObjectWrapper extends UINode { | |
| 458 | |
| 459 RenderObjectWrapper({ String key }) : super(key: key); | |
| 460 | |
| 461 RenderObject createNode(); | |
| 462 | |
| 463 void insert(RenderObjectWrapper child, dynamic slot); | |
| 464 | |
| 465 static final Map<RenderObject, RenderObjectWrapper> _nodeMap = | |
| 466 new HashMap<RenderObject, RenderObjectWrapper>(); | |
| 467 | |
| 468 static RenderObjectWrapper _getMounted(RenderObject node) => _nodeMap[node]; | |
| 469 | |
| 470 void _sync(UINode old, dynamic slot) { | |
| 471 assert(parent != null); | |
| 472 if (old == null) { | |
| 473 _root = createNode(); | |
| 474 var ancestor = findAncestor(RenderObjectWrapper); | |
| 475 if (ancestor is RenderObjectWrapper) | |
| 476 ancestor.insert(this, slot); | |
| 477 } else { | |
| 478 _root = old.root; | |
| 479 } | |
| 480 assert(_root == root); // in case a subclass reintroduces it | |
| 481 assert(root != null); | |
| 482 assert(mounted); | |
| 483 _nodeMap[root] = this; | |
| 484 syncRenderObject(old); | |
| 485 } | |
| 486 | |
| 487 void syncRenderObject(RenderObjectWrapper old) { | |
| 488 ParentData parentData = null; | |
| 489 UINode ancestor = parent; | |
| 490 while (ancestor != null && ancestor is! RenderObjectWrapper) { | |
| 491 if (ancestor is ParentDataNode && ancestor.parentData != null) { | |
| 492 if (parentData != null) | |
| 493 parentData.merge(ancestor.parentData); // this will throw if the types
aren't the same | |
| 494 else | |
| 495 parentData = ancestor.parentData; | |
| 496 } | |
| 497 ancestor = ancestor.parent; | |
| 498 } | |
| 499 if (parentData != null) { | |
| 500 assert(root.parentData != null); | |
| 501 root.parentData.merge(parentData); // this will throw if the types aren't
appropriate | |
| 502 if (parent.root != null) | |
| 503 parent.root.markNeedsLayout(); | |
| 504 } | |
| 505 } | |
| 506 | |
| 507 void remove() { | |
| 508 assert(root != null); | |
| 509 _nodeMap.remove(root); | |
| 510 super.remove(); | |
| 511 } | |
| 512 } | |
| 513 | |
| 514 abstract class OneChildRenderObjectWrapper extends RenderObjectWrapper { | |
| 515 | |
| 516 OneChildRenderObjectWrapper({ UINode child, String key }) | |
| 517 : _child = child, super(key: key); | |
| 518 | |
| 519 UINode _child; | |
| 520 UINode get child => _child; | |
| 521 | |
| 522 void syncRenderObject(RenderObjectWrapper old) { | |
| 523 super.syncRenderObject(old); | |
| 524 UINode oldChild = old == null ? null : (old as OneChildRenderObjectWrapper).
child; | |
| 525 _child = syncChild(child, oldChild, null); | |
| 526 } | |
| 527 | |
| 528 void insert(RenderObjectWrapper child, dynamic slot) { | |
| 529 final root = this.root; // TODO(ianh): Remove this once the analyzer is clev
erer | |
| 530 assert(slot == null); | |
| 531 assert(root is RenderObjectWithChildMixin); | |
| 532 root.child = child.root; | |
| 533 assert(root == this.root); // TODO(ianh): Remove this once the analyzer is c
leverer | |
| 534 } | |
| 535 | |
| 536 void removeChild(UINode node) { | |
| 537 final root = this.root; // TODO(ianh): Remove this once the analyzer is clev
erer | |
| 538 assert(root is RenderObjectWithChildMixin); | |
| 539 root.child = null; | |
| 540 super.removeChild(node); | |
| 541 assert(root == this.root); // TODO(ianh): Remove this once the analyzer is c
leverer | |
| 542 } | |
| 543 | |
| 544 void remove() { | |
| 545 if (child != null) | |
| 546 removeChild(child); | |
| 547 super.remove(); | |
| 548 } | |
| 549 | |
| 550 } | |
| 551 | |
| 552 abstract class MultiChildRenderObjectWrapper extends RenderObjectWrapper { | |
| 553 | |
| 554 // In MultiChildRenderObjectWrapper subclasses, slots are RenderObject nodes | |
| 555 // to use as the "insert before" sibling in ContainerRenderObjectMixin.add() c
alls | |
| 556 | |
| 557 MultiChildRenderObjectWrapper({ String key, List<UINode> children }) | |
| 558 : this.children = children == null ? const [] : children, | |
| 559 super(key: key) { | |
| 560 assert(!_debugHasDuplicateIds()); | |
| 561 } | |
| 562 | |
| 563 final List<UINode> children; | |
| 564 | |
| 565 void insert(RenderObjectWrapper child, dynamic slot) { | |
| 566 final root = this.root; // TODO(ianh): Remove this once the analyzer is clev
erer | |
| 567 assert(slot == null || slot is RenderObject); | |
| 568 assert(root is ContainerRenderObjectMixin); | |
| 569 root.add(child.root, before: slot); | |
| 570 assert(root == this.root); // TODO(ianh): Remove this once the analyzer is c
leverer | |
| 571 } | |
| 572 | |
| 573 void removeChild(UINode node) { | |
| 574 final root = this.root; // TODO(ianh): Remove this once the analyzer is clev
erer | |
| 575 assert(root is ContainerRenderObjectMixin); | |
| 576 assert(node.root.parent == root); | |
| 577 root.remove(node.root); | |
| 578 super.removeChild(node); | |
| 579 assert(root == this.root); // TODO(ianh): Remove this once the analyzer is c
leverer | |
| 580 } | |
| 581 | |
| 582 void remove() { | |
| 583 assert(children != null); | |
| 584 for (var child in children) { | |
| 585 assert(child != null); | |
| 586 removeChild(child); | |
| 587 } | |
| 588 super.remove(); | |
| 589 } | |
| 590 | |
| 591 bool _debugHasDuplicateIds() { | |
| 592 var idSet = new HashSet<String>(); | |
| 593 for (var child in children) { | |
| 594 assert(child != null); | |
| 595 if (child.interchangeable) | |
| 596 continue; // when these nodes are reordered, we just reassign the data | |
| 597 | |
| 598 if (!idSet.add(child._key)) { | |
| 599 throw '''If multiple non-interchangeable nodes of the same type exist as
children | |
| 600 of another node, they must have unique keys. | |
| 601 Duplicate: "${child._key}"'''; | |
| 602 } | |
| 603 } | |
| 604 return false; | |
| 605 } | |
| 606 | |
| 607 void syncRenderObject(MultiChildRenderObjectWrapper old) { | |
| 608 super.syncRenderObject(old); | |
| 609 | |
| 610 final root = this.root; // TODO(ianh): Remove this once the analyzer is clev
erer | |
| 611 if (root is! ContainerRenderObjectMixin) | |
| 612 return; | |
| 613 | |
| 614 var startIndex = 0; | |
| 615 var endIndex = children.length; | |
| 616 | |
| 617 var oldChildren = old == null ? [] : old.children; | |
| 618 var oldStartIndex = 0; | |
| 619 var oldEndIndex = oldChildren.length; | |
| 620 | |
| 621 RenderObject nextSibling = null; | |
| 622 UINode currentNode = null; | |
| 623 UINode oldNode = null; | |
| 624 | |
| 625 void sync(int atIndex) { | |
| 626 children[atIndex] = syncChild(currentNode, oldNode, nextSibling); | |
| 627 assert(children[atIndex] != null); | |
| 628 } | |
| 629 | |
| 630 // Scan backwards from end of list while nodes can be directly synced | |
| 631 // without reordering. | |
| 632 while (endIndex > startIndex && oldEndIndex > oldStartIndex) { | |
| 633 currentNode = children[endIndex - 1]; | |
| 634 oldNode = oldChildren[oldEndIndex - 1]; | |
| 635 | |
| 636 if (currentNode._key != oldNode._key) { | |
| 637 break; | |
| 638 } | |
| 639 | |
| 640 endIndex--; | |
| 641 oldEndIndex--; | |
| 642 sync(endIndex); | |
| 643 } | |
| 644 | |
| 645 HashMap<String, UINode> oldNodeIdMap = null; | |
| 646 | |
| 647 bool oldNodeReordered(String key) { | |
| 648 return oldNodeIdMap != null && | |
| 649 oldNodeIdMap.containsKey(key) && | |
| 650 oldNodeIdMap[key] == null; | |
| 651 } | |
| 652 | |
| 653 void advanceOldStartIndex() { | |
| 654 oldStartIndex++; | |
| 655 while (oldStartIndex < oldEndIndex && | |
| 656 oldNodeReordered(oldChildren[oldStartIndex]._key)) { | |
| 657 oldStartIndex++; | |
| 658 } | |
| 659 } | |
| 660 | |
| 661 void ensureOldIdMap() { | |
| 662 if (oldNodeIdMap != null) | |
| 663 return; | |
| 664 | |
| 665 oldNodeIdMap = new HashMap<String, UINode>(); | |
| 666 for (int i = oldStartIndex; i < oldEndIndex; i++) { | |
| 667 var node = oldChildren[i]; | |
| 668 if (!node.interchangeable) | |
| 669 oldNodeIdMap.putIfAbsent(node._key, () => node); | |
| 670 } | |
| 671 } | |
| 672 | |
| 673 bool searchForOldNode() { | |
| 674 if (currentNode.interchangeable) | |
| 675 return false; // never re-order these nodes | |
| 676 | |
| 677 ensureOldIdMap(); | |
| 678 oldNode = oldNodeIdMap[currentNode._key]; | |
| 679 if (oldNode == null) | |
| 680 return false; | |
| 681 | |
| 682 oldNodeIdMap[currentNode._key] = null; // mark it reordered | |
| 683 assert(root is ContainerRenderObjectMixin); | |
| 684 assert(old.root is ContainerRenderObjectMixin); | |
| 685 assert(oldNode.root != null); | |
| 686 | |
| 687 (old.root as ContainerRenderObjectMixin).remove(oldNode.root); // TODO(ian
h): Remove cast once the analyzer is cleverer | |
| 688 root.add(oldNode.root, before: nextSibling); | |
| 689 | |
| 690 return true; | |
| 691 } | |
| 692 | |
| 693 // Scan forwards, this time we may re-order; | |
| 694 nextSibling = root.firstChild; | |
| 695 while (startIndex < endIndex && oldStartIndex < oldEndIndex) { | |
| 696 currentNode = children[startIndex]; | |
| 697 oldNode = oldChildren[oldStartIndex]; | |
| 698 | |
| 699 if (currentNode._key == oldNode._key) { | |
| 700 assert(currentNode.runtimeType == oldNode.runtimeType); | |
| 701 nextSibling = root.childAfter(nextSibling); | |
| 702 sync(startIndex); | |
| 703 startIndex++; | |
| 704 advanceOldStartIndex(); | |
| 705 continue; | |
| 706 } | |
| 707 | |
| 708 oldNode = null; | |
| 709 searchForOldNode(); | |
| 710 sync(startIndex); | |
| 711 startIndex++; | |
| 712 } | |
| 713 | |
| 714 // New insertions | |
| 715 oldNode = null; | |
| 716 while (startIndex < endIndex) { | |
| 717 currentNode = children[startIndex]; | |
| 718 sync(startIndex); | |
| 719 startIndex++; | |
| 720 } | |
| 721 | |
| 722 // Removals | |
| 723 currentNode = null; | |
| 724 while (oldStartIndex < oldEndIndex) { | |
| 725 oldNode = oldChildren[oldStartIndex]; | |
| 726 removeChild(oldNode); | |
| 727 advanceOldStartIndex(); | |
| 728 } | |
| 729 | |
| 730 assert(root == this.root); // TODO(ianh): Remove this once the analyzer is c
leverer | |
| 731 } | |
| 732 | |
| 733 } | |
| 734 | |
| 735 class UINodeAppView extends AppView { | |
| 736 | |
| 737 UINodeAppView({ RenderView renderViewOverride: null }) | |
| 738 : super(renderViewOverride: renderViewOverride) { | |
| 739 assert(_appView == null); | |
| 740 } | |
| 741 | |
| 742 static UINodeAppView _appView; | |
| 743 static AppView get appView => _appView; | |
| 744 static void initUINodeAppView({ RenderView renderViewOverride: null }) { | |
| 745 if (_appView == null) | |
| 746 _appView = new UINodeAppView(renderViewOverride: renderViewOverride); | |
| 747 } | |
| 748 | |
| 749 void dispatchEvent(sky.Event event, HitTestResult result) { | |
| 750 assert(_appView == this); | |
| 751 super.dispatchEvent(event, result); | |
| 752 for (HitTestEntry entry in result.path.reversed) { | |
| 753 UINode target = RenderObjectWrapper._getMounted(entry.target); | |
| 754 if (target == null) | |
| 755 continue; | |
| 756 RenderObject targetRoot = target.root; | |
| 757 while (target != null && target.root == targetRoot) { | |
| 758 if (target is EventListenerNode) | |
| 759 target._handleEvent(event); | |
| 760 target = target._parent; | |
| 761 } | |
| 762 } | |
| 763 } | |
| 764 | |
| 765 } | |
| 766 | |
| 767 abstract class AbstractUINodeRoot extends Component { | |
| 768 | |
| 769 AbstractUINodeRoot({ RenderView renderViewOverride }) : super(stateful: true)
{ | |
| 770 UINodeAppView.initUINodeAppView(renderViewOverride: renderViewOverride); | |
| 771 _mounted = true; | |
| 772 _scheduleComponentForRender(this); | |
| 773 } | |
| 774 | |
| 775 void syncFields(AbstractUINodeRoot source) { | |
| 776 assert(false); | |
| 777 // if we get here, it implies that we have a parent | |
| 778 } | |
| 779 | |
| 780 void _buildIfDirty() { | |
| 781 assert(_dirty); | |
| 782 assert(_mounted); | |
| 783 assert(parent == null); | |
| 784 _sync(null, null); | |
| 785 } | |
| 786 | |
| 787 } | |
| 788 | |
| 789 abstract class App extends AbstractUINodeRoot { | |
| 790 | |
| 791 App({ RenderView renderViewOverride }) : super(renderViewOverride: renderViewO
verride); | |
| 792 | |
| 793 void _buildIfDirty() { | |
| 794 super._buildIfDirty(); | |
| 795 | |
| 796 if (root.parent == null) { | |
| 797 // we haven't attached it yet | |
| 798 UINodeAppView._appView.root = root; | |
| 799 } | |
| 800 assert(root.parent is RenderView); | |
| 801 } | |
| 802 | |
| 803 } | |
| 804 | |
| 805 typedef UINode Builder(); | |
| 806 | |
| 807 class RenderBoxToUINodeAdapter extends AbstractUINodeRoot { | |
| 808 | |
| 809 RenderBoxToUINodeAdapter( | |
| 810 RenderObjectWithChildMixin<RenderBox> container, | |
| 811 this.builder | |
| 812 ) : _container = container, super() { | |
| 813 assert(builder != null); | |
| 814 } | |
| 815 | |
| 816 RenderObjectWithChildMixin<RenderBox> _container; | |
| 817 RenderObjectWithChildMixin<RenderBox> get container => _container; | |
| 818 void set container(RenderObjectWithChildMixin<RenderBox> value) { | |
| 819 if (_container != value) { | |
| 820 assert(value.child == null); | |
| 821 if (root != null) { | |
| 822 assert(_container.child == root); | |
| 823 _container.child = null; | |
| 824 } | |
| 825 _container = value; | |
| 826 if (root != null) { | |
| 827 _container.child = root; | |
| 828 assert(_container.child == root); | |
| 829 } | |
| 830 } | |
| 831 } | |
| 832 | |
| 833 final Builder builder; | |
| 834 | |
| 835 void _buildIfDirty() { | |
| 836 super._buildIfDirty(); | |
| 837 if (root.parent == null) { | |
| 838 // we haven't attached it yet | |
| 839 assert(_container.child == null); | |
| 840 _container.child = root; | |
| 841 } | |
| 842 assert(root.parent == _container); | |
| 843 } | |
| 844 | |
| 845 UINode build() => builder(); | |
| 846 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1190793002:
Rename UINode to Widget. (Closed)
Base URL: https://github.com/domokit/mojo.git@master