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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 library fn; | |
| 6 | |
| 7 import 'app.dart'; | |
| 8 import 'dart:async'; | |
| 9 import 'dart:collection'; | |
| 10 import 'dart:mirrors'; | |
| 11 import 'dart:sky' as sky; | |
| 12 import 'package:vector_math/vector_math.dart'; | |
| 13 import 'rendering/block.dart'; | |
| 14 import 'rendering/box.dart'; | |
| 15 import 'rendering/flex.dart'; | |
| 16 import 'rendering/object.dart'; | |
| 17 import 'rendering/paragraph.dart'; | |
| 18 import 'rendering/stack.dart'; | |
| 19 export 'rendering/object.dart' show Point, Size, Rect, Color, Paint, Path; | |
| 20 export 'rendering/box.dart' show BoxConstraints, BoxDecoration, Border, BorderSi
de, EdgeDims; | |
| 21 export 'rendering/flex.dart' show FlexDirection; | |
| 22 | |
| 23 // final sky.Tracing _tracing = sky.window.tracing; | |
| 24 | |
| 25 final bool _shouldLogRenderDuration = false; | |
| 26 | |
| 27 /* | |
| 28 * All Effen nodes derive from UINode. All nodes have a _parent, a _key and | |
| 29 * can be sync'd. | |
| 30 */ | |
| 31 abstract class UINode { | |
| 32 | |
| 33 UINode({ Object key }) { | |
| 34 _key = key == null ? "$runtimeType" : "$runtimeType-$key"; | |
| 35 assert(this is App || _inRenderDirtyComponents); // you should not build the
UI tree ahead of time, build it only during build() | |
| 36 } | |
| 37 | |
| 38 String _key; | |
| 39 String get key => _key; | |
| 40 | |
| 41 UINode _parent; | |
| 42 UINode get parent => _parent; | |
| 43 | |
| 44 bool _mounted = false; | |
| 45 bool _wasMounted = false; | |
| 46 bool get mounted => _mounted; | |
| 47 static bool _notifyingMountStatus = false; | |
| 48 static Set<UINode> _mountedChanged = new HashSet<UINode>(); | |
| 49 | |
| 50 void setParent(UINode newParent) { | |
| 51 assert(!_notifyingMountStatus); | |
| 52 _parent = newParent; | |
| 53 if (newParent == null) { | |
| 54 if (_mounted) { | |
| 55 _mounted = false; | |
| 56 _mountedChanged.add(this); | |
| 57 } | |
| 58 } else { | |
| 59 assert(newParent._mounted); | |
| 60 if (_parent._mounted != _mounted) { | |
| 61 _mounted = _parent._mounted; | |
| 62 _mountedChanged.add(this); | |
| 63 } | |
| 64 } | |
| 65 } | |
| 66 | |
| 67 static void _notifyMountStatusChanged() { | |
| 68 try { | |
| 69 _notifyingMountStatus = true; | |
| 70 for (UINode node in _mountedChanged) { | |
| 71 if (node._wasMounted != node._mounted) { | |
| 72 if (node._mounted) | |
| 73 node.didMount(); | |
| 74 else | |
| 75 node.didUnmount(); | |
| 76 node._wasMounted = node._mounted; | |
| 77 } | |
| 78 } | |
| 79 _mountedChanged.clear(); | |
| 80 } finally { | |
| 81 _notifyingMountStatus = false; | |
| 82 } | |
| 83 } | |
| 84 void didMount() { } | |
| 85 void didUnmount() { } | |
| 86 | |
| 87 RenderObject _root; | |
| 88 RenderObject get root => _root; | |
| 89 | |
| 90 // Subclasses which implements Nodes that become stateful may return true | |
| 91 // if the |old| node has become stateful and should be retained. | |
| 92 // This is called immediately before _sync(). | |
| 93 // Component._retainStatefulNodeIfPossible() calls syncFields(). | |
| 94 bool _retainStatefulNodeIfPossible(UINode old) => false; | |
| 95 | |
| 96 bool get interchangeable => false; // if true, then keys can be duplicated | |
| 97 | |
| 98 void _sync(UINode old, dynamic slot); | |
| 99 // 'slot' is the identifier that the parent RenderObjectWrapper uses to know | |
| 100 // where to put this descendant | |
| 101 | |
| 102 void remove() { | |
| 103 _root = null; | |
| 104 setParent(null); | |
| 105 } | |
| 106 | |
| 107 UINode findAncestor(Type targetType) { | |
| 108 var ancestor = _parent; | |
| 109 while (ancestor != null && !reflectClass(ancestor.runtimeType).isSubtypeOf(r
eflectClass(targetType))) | |
| 110 ancestor = ancestor._parent; | |
| 111 return ancestor; | |
| 112 } | |
| 113 | |
| 114 void removeChild(UINode node) { | |
| 115 node.remove(); | |
| 116 } | |
| 117 | |
| 118 // Returns the child which should be retained as the child of this node. | |
| 119 UINode syncChild(UINode node, UINode oldNode, dynamic slot) { | |
| 120 | |
| 121 assert(oldNode is! Component || !oldNode._disqualifiedFromEverAppearingAgain
); | |
| 122 | |
| 123 if (node == oldNode) { | |
| 124 assert(node == null || node.mounted); | |
| 125 return node; // Nothing to do. Subtrees must be identical. | |
| 126 } | |
| 127 | |
| 128 if (node == null) { | |
| 129 // the child in this slot has gone away | |
| 130 assert(oldNode.mounted); | |
| 131 removeChild(oldNode); | |
| 132 assert(!oldNode.mounted); | |
| 133 return null; | |
| 134 } | |
| 135 | |
| 136 if (oldNode != null && node._key == oldNode._key && node._retainStatefulNode
IfPossible(oldNode)) { | |
| 137 assert(oldNode.mounted); | |
| 138 assert(!node.mounted); | |
| 139 oldNode._sync(node, slot); | |
| 140 assert(oldNode.root is RenderObject); | |
| 141 return oldNode; | |
| 142 } | |
| 143 | |
| 144 if (oldNode != null && node._key != oldNode._key) { | |
| 145 assert(oldNode.mounted); | |
| 146 removeChild(oldNode); | |
| 147 oldNode = null; | |
| 148 } | |
| 149 | |
| 150 assert(!node.mounted); | |
| 151 node.setParent(this); | |
| 152 node._sync(oldNode, slot); | |
| 153 assert(node.root is RenderObject); | |
| 154 return node; | |
| 155 } | |
| 156 } | |
| 157 | |
| 158 // Descendants of TagNode provide a way to tag RenderObjectWrapper and | |
| 159 // Component nodes with annotations, such as event listeners, | |
| 160 // stylistic information, etc. | |
| 161 abstract class TagNode extends UINode { | |
| 162 | |
| 163 TagNode(UINode content, { Object key }) : this.content = content, super(key: k
ey); | |
| 164 | |
| 165 UINode content; | |
| 166 | |
| 167 void _sync(UINode old, dynamic slot) { | |
| 168 UINode oldContent = old == null ? null : (old as TagNode).content; | |
| 169 content = syncChild(content, oldContent, slot); | |
| 170 assert(content.root != null); | |
| 171 _root = content.root; | |
| 172 assert(_root == root); // in case a subclass reintroduces it | |
| 173 } | |
| 174 | |
| 175 void remove() { | |
| 176 if (content != null) | |
| 177 removeChild(content); | |
| 178 super.remove(); | |
| 179 } | |
| 180 | |
| 181 } | |
| 182 | |
| 183 class ParentDataNode extends TagNode { | |
| 184 ParentDataNode(UINode content, this.parentData, { Object key }): super(content
, key: key); | |
| 185 final ParentData parentData; | |
| 186 } | |
| 187 | |
| 188 typedef void GestureEventListener(sky.GestureEvent e); | |
| 189 typedef void PointerEventListener(sky.PointerEvent e); | |
| 190 typedef void EventListener(sky.Event e); | |
| 191 | |
| 192 class EventListenerNode extends TagNode { | |
| 193 | |
| 194 EventListenerNode(UINode content, { | |
| 195 EventListener onWheel, | |
| 196 GestureEventListener onGestureFlingCancel, | |
| 197 GestureEventListener onGestureFlingStart, | |
| 198 GestureEventListener onGestureScrollStart, | |
| 199 GestureEventListener onGestureScrollUpdate, | |
| 200 GestureEventListener onGestureTap, | |
| 201 GestureEventListener onGestureTapDown, | |
| 202 PointerEventListener onPointerCancel, | |
| 203 PointerEventListener onPointerDown, | |
| 204 PointerEventListener onPointerMove, | |
| 205 PointerEventListener onPointerUp, | |
| 206 Map<String, sky.EventListener> custom | |
| 207 }) : listeners = _createListeners( | |
| 208 onWheel: onWheel, | |
| 209 onGestureFlingCancel: onGestureFlingCancel, | |
| 210 onGestureFlingStart: onGestureFlingStart, | |
| 211 onGestureScrollUpdate: onGestureScrollUpdate, | |
| 212 onGestureScrollStart: onGestureScrollStart, | |
| 213 onGestureTap: onGestureTap, | |
| 214 onGestureTapDown: onGestureTapDown, | |
| 215 onPointerCancel: onPointerCancel, | |
| 216 onPointerDown: onPointerDown, | |
| 217 onPointerMove: onPointerMove, | |
| 218 onPointerUp: onPointerUp, | |
| 219 custom: custom | |
| 220 ), | |
| 221 super(content); | |
| 222 | |
| 223 final Map<String, sky.EventListener> listeners; | |
| 224 | |
| 225 static Map<String, sky.EventListener> _createListeners({ | |
| 226 EventListener onWheel, | |
| 227 GestureEventListener onGestureFlingCancel, | |
| 228 GestureEventListener onGestureFlingStart, | |
| 229 GestureEventListener onGestureScrollStart, | |
| 230 GestureEventListener onGestureScrollUpdate, | |
| 231 GestureEventListener onGestureTap, | |
| 232 GestureEventListener onGestureTapDown, | |
| 233 PointerEventListener onPointerCancel, | |
| 234 PointerEventListener onPointerDown, | |
| 235 PointerEventListener onPointerMove, | |
| 236 PointerEventListener onPointerUp, | |
| 237 Map<String, sky.EventListener> custom | |
| 238 }) { | |
| 239 var listeners = custom != null ? | |
| 240 new HashMap<String, sky.EventListener>.from(custom) : | |
| 241 new HashMap<String, sky.EventListener>(); | |
| 242 | |
| 243 if (onWheel != null) | |
| 244 listeners['wheel'] = onWheel; | |
| 245 if (onGestureFlingCancel != null) | |
| 246 listeners['gestureflingcancel'] = onGestureFlingCancel; | |
| 247 if (onGestureFlingStart != null) | |
| 248 listeners['gestureflingstart'] = onGestureFlingStart; | |
| 249 if (onGestureScrollStart != null) | |
| 250 listeners['gesturescrollstart'] = onGestureScrollStart; | |
| 251 if (onGestureScrollUpdate != null) | |
| 252 listeners['gesturescrollupdate'] = onGestureScrollUpdate; | |
| 253 if (onGestureTap != null) | |
| 254 listeners['gesturetap'] = onGestureTap; | |
| 255 if (onGestureTapDown != null) | |
| 256 listeners['gesturetapdown'] = onGestureTapDown; | |
| 257 if (onPointerCancel != null) | |
| 258 listeners['pointercancel'] = onPointerCancel; | |
| 259 if (onPointerDown != null) | |
| 260 listeners['pointerdown'] = onPointerDown; | |
| 261 if (onPointerMove != null) | |
| 262 listeners['pointermove'] = onPointerMove; | |
| 263 if (onPointerUp != null) | |
| 264 listeners['pointerup'] = onPointerUp; | |
| 265 | |
| 266 return listeners; | |
| 267 } | |
| 268 | |
| 269 void _handleEvent(sky.Event e) { | |
| 270 sky.EventListener listener = listeners[e.type]; | |
| 271 if (listener != null) { | |
| 272 listener(e); | |
| 273 } | |
| 274 } | |
| 275 | |
| 276 } | |
| 277 | |
| 278 /* | |
| 279 * RenderObjectWrappers correspond to a desired state of a RenderObject. | |
| 280 * They are fully immutable, with one exception: A UINode which is a | |
| 281 * Component which lives within an MultiChildRenderObjectWrapper's | |
| 282 * children list, may be replaced with the "old" instance if it has | |
| 283 * become stateful. | |
| 284 */ | |
| 285 abstract class RenderObjectWrapper extends UINode { | |
| 286 | |
| 287 RenderObjectWrapper({ | |
| 288 Object key | |
| 289 }) : super(key: key); | |
| 290 | |
| 291 RenderObject createNode(); | |
| 292 | |
| 293 void insert(RenderObjectWrapper child, dynamic slot); | |
| 294 | |
| 295 static final Map<RenderObject, RenderObjectWrapper> _nodeMap = | |
| 296 new HashMap<RenderObject, RenderObjectWrapper>(); | |
| 297 | |
| 298 static RenderObjectWrapper _getMounted(RenderObject node) => _nodeMap[node]; | |
| 299 | |
| 300 void _sync(UINode old, dynamic slot) { | |
| 301 assert(parent != null); | |
| 302 if (old == null) { | |
| 303 _root = createNode(); | |
| 304 var ancestor = findAncestor(RenderObjectWrapper); | |
| 305 if (ancestor is RenderObjectWrapper) | |
| 306 ancestor.insert(this, slot); | |
| 307 } else { | |
| 308 _root = old.root; | |
| 309 } | |
| 310 assert(_root == root); // in case a subclass reintroduces it | |
| 311 assert(root != null); | |
| 312 assert(mounted); | |
| 313 _nodeMap[root] = this; | |
| 314 syncRenderObject(old); | |
| 315 } | |
| 316 | |
| 317 void syncRenderObject(RenderObjectWrapper old) { | |
| 318 ParentData parentData = null; | |
| 319 UINode ancestor = parent; | |
| 320 while (ancestor != null && ancestor is! RenderObjectWrapper) { | |
| 321 if (ancestor is ParentDataNode && ancestor.parentData != null) { | |
| 322 if (parentData != null) | |
| 323 parentData.merge(ancestor.parentData); // this will throw if the types
aren't the same | |
| 324 else | |
| 325 parentData = ancestor.parentData; | |
| 326 } | |
| 327 ancestor = ancestor.parent; | |
| 328 } | |
| 329 if (parentData != null) { | |
| 330 assert(root.parentData != null); | |
| 331 root.parentData.merge(parentData); // this will throw if the types aren't
appropriate | |
| 332 if (parent.root != null) | |
| 333 parent.root.markNeedsLayout(); | |
| 334 } | |
| 335 } | |
| 336 | |
| 337 void remove() { | |
| 338 assert(root != null); | |
| 339 _nodeMap.remove(root); | |
| 340 super.remove(); | |
| 341 } | |
| 342 } | |
| 343 | |
| 344 abstract class OneChildRenderObjectWrapper extends RenderObjectWrapper { | |
| 345 | |
| 346 OneChildRenderObjectWrapper({ UINode child, Object key }) : _child = child, su
per(key: key); | |
| 347 | |
| 348 UINode _child; | |
| 349 UINode get child => _child; | |
| 350 | |
| 351 void syncRenderObject(RenderObjectWrapper old) { | |
| 352 super.syncRenderObject(old); | |
| 353 UINode oldChild = old == null ? null : (old as OneChildRenderObjectWrapper).
child; | |
| 354 _child = syncChild(child, oldChild, null); | |
| 355 } | |
| 356 | |
| 357 void insert(RenderObjectWrapper child, dynamic slot) { | |
| 358 final root = this.root; // TODO(ianh): Remove this once the analyzer is clev
erer | |
| 359 assert(slot == null); | |
| 360 assert(root is RenderObjectWithChildMixin); | |
| 361 root.child = child.root; | |
| 362 assert(root == this.root); // TODO(ianh): Remove this once the analyzer is c
leverer | |
| 363 } | |
| 364 | |
| 365 void removeChild(UINode node) { | |
| 366 final root = this.root; // TODO(ianh): Remove this once the analyzer is clev
erer | |
| 367 assert(root is RenderObjectWithChildMixin); | |
| 368 root.child = null; | |
| 369 super.removeChild(node); | |
| 370 assert(root == this.root); // TODO(ianh): Remove this once the analyzer is c
leverer | |
| 371 } | |
| 372 | |
| 373 void remove() { | |
| 374 if (child != null) | |
| 375 removeChild(child); | |
| 376 super.remove(); | |
| 377 } | |
| 378 | |
| 379 } | |
| 380 | |
| 381 class Opacity extends OneChildRenderObjectWrapper { | |
| 382 Opacity({ this.opacity, UINode child, Object key }) | |
| 383 : super(child: child, key: key); | |
| 384 | |
| 385 RenderOpacity get root { RenderOpacity result = super.root; return result; } | |
| 386 final double opacity; | |
| 387 | |
| 388 RenderOpacity createNode() => new RenderOpacity(opacity: opacity); | |
| 389 | |
| 390 void syncRenderObject(Opacity old) { | |
| 391 super.syncRenderObject(old); | |
| 392 root.opacity = opacity; | |
| 393 } | |
| 394 } | |
| 395 | |
| 396 class ClipRect extends OneChildRenderObjectWrapper { | |
| 397 | |
| 398 ClipRect({ UINode child, Object key }) | |
| 399 : super(child: child, key: key); | |
| 400 | |
| 401 RenderClipRect get root { RenderClipRect result = super.root; return result; } | |
| 402 RenderClipRect createNode() => new RenderClipRect(); | |
| 403 } | |
| 404 | |
| 405 class ClipOval extends OneChildRenderObjectWrapper { | |
| 406 | |
| 407 ClipOval({ UINode child, Object key }) | |
| 408 : super(child: child, key: key); | |
| 409 | |
| 410 RenderClipOval get root { RenderClipOval result = super.root; return result; } | |
| 411 RenderClipOval createNode() => new RenderClipOval(); | |
| 412 } | |
| 413 | |
| 414 class Padding extends OneChildRenderObjectWrapper { | |
| 415 | |
| 416 Padding({ this.padding, UINode child, Object key }) | |
| 417 : super(child: child, key: key); | |
| 418 | |
| 419 RenderPadding get root { RenderPadding result = super.root; return result; } | |
| 420 final EdgeDims padding; | |
| 421 | |
| 422 RenderPadding createNode() => new RenderPadding(padding: padding); | |
| 423 | |
| 424 void syncRenderObject(Padding old) { | |
| 425 super.syncRenderObject(old); | |
| 426 root.padding = padding; | |
| 427 } | |
| 428 | |
| 429 } | |
| 430 | |
| 431 class DecoratedBox extends OneChildRenderObjectWrapper { | |
| 432 | |
| 433 DecoratedBox({ this.decoration, UINode child, Object key }) | |
| 434 : super(child: child, key: key); | |
| 435 | |
| 436 RenderDecoratedBox get root { RenderDecoratedBox result = super.root; return r
esult; } | |
| 437 final BoxDecoration decoration; | |
| 438 | |
| 439 RenderDecoratedBox createNode() => new RenderDecoratedBox(decoration: decorati
on); | |
| 440 | |
| 441 void syncRenderObject(DecoratedBox old) { | |
| 442 super.syncRenderObject(old); | |
| 443 root.decoration = decoration; | |
| 444 } | |
| 445 | |
| 446 } | |
| 447 | |
| 448 class SizedBox extends OneChildRenderObjectWrapper { | |
| 449 | |
| 450 SizedBox({ | |
| 451 double width: double.INFINITY, | |
| 452 double height: double.INFINITY, | |
| 453 UINode child, | |
| 454 Object key | |
| 455 }) : desiredSize = new Size(width, height), super(child: child, key: key); | |
| 456 | |
| 457 RenderSizedBox get root { RenderSizedBox result = super.root; return result; } | |
| 458 final Size desiredSize; | |
| 459 | |
| 460 RenderSizedBox createNode() => new RenderSizedBox(desiredSize: desiredSize); | |
| 461 | |
| 462 void syncRenderObject(SizedBox old) { | |
| 463 super.syncRenderObject(old); | |
| 464 root.desiredSize = desiredSize; | |
| 465 } | |
| 466 | |
| 467 } | |
| 468 | |
| 469 class ConstrainedBox extends OneChildRenderObjectWrapper { | |
| 470 | |
| 471 ConstrainedBox({ this.constraints, UINode child, Object key }) | |
| 472 : super(child: child, key: key); | |
| 473 | |
| 474 RenderConstrainedBox get root { RenderConstrainedBox result = super.root; retu
rn result; } | |
| 475 final BoxConstraints constraints; | |
| 476 | |
| 477 RenderConstrainedBox createNode() => new RenderConstrainedBox(additionalConstr
aints: constraints); | |
| 478 | |
| 479 void syncRenderObject(ConstrainedBox old) { | |
| 480 super.syncRenderObject(old); | |
| 481 root.additionalConstraints = constraints; | |
| 482 } | |
| 483 | |
| 484 } | |
| 485 | |
| 486 class ShrinkWrapWidth extends OneChildRenderObjectWrapper { | |
| 487 | |
| 488 ShrinkWrapWidth({ UINode child, Object key }) : super(child: child, key: key); | |
| 489 | |
| 490 RenderShrinkWrapWidth get root { RenderShrinkWrapWidth result = super.root; re
turn result; } | |
| 491 | |
| 492 RenderShrinkWrapWidth createNode() => new RenderShrinkWrapWidth(); | |
| 493 | |
| 494 } | |
| 495 | |
| 496 class Transform extends OneChildRenderObjectWrapper { | |
| 497 | |
| 498 Transform({ this.transform, UINode child, Object key }) | |
| 499 : super(child: child, key: key); | |
| 500 | |
| 501 RenderTransform get root { RenderTransform result = super.root; return result;
} | |
| 502 final Matrix4 transform; | |
| 503 | |
| 504 RenderTransform createNode() => new RenderTransform(transform: transform); | |
| 505 | |
| 506 void syncRenderObject(Transform old) { | |
| 507 super.syncRenderObject(old); | |
| 508 root.transform = transform; | |
| 509 } | |
| 510 | |
| 511 } | |
| 512 | |
| 513 class SizeObserver extends OneChildRenderObjectWrapper { | |
| 514 | |
| 515 SizeObserver({ this.callback, UINode child, Object key }) | |
| 516 : super(child: child, key: key); | |
| 517 | |
| 518 RenderSizeObserver get root { RenderSizeObserver result = super.root; return r
esult; } | |
| 519 final SizeChangedCallback callback; | |
| 520 | |
| 521 RenderSizeObserver createNode() => new RenderSizeObserver(callback: callback); | |
| 522 | |
| 523 void syncRenderObject(SizeObserver old) { | |
| 524 super.syncRenderObject(old); | |
| 525 root.callback = callback; | |
| 526 } | |
| 527 | |
| 528 void remove() { | |
| 529 root.callback = null; | |
| 530 super.remove(); | |
| 531 } | |
| 532 | |
| 533 } | |
| 534 | |
| 535 // TODO(jackson) need a mechanism for marking the RenderCustomPaint as needing p
aint | |
| 536 class CustomPaint extends OneChildRenderObjectWrapper { | |
| 537 | |
| 538 CustomPaint({ this.callback, UINode child, Object key }) | |
| 539 : super(child: child, key: key); | |
| 540 | |
| 541 RenderCustomPaint get root { RenderCustomPaint result = super.root; return res
ult; } | |
| 542 final CustomPaintCallback callback; | |
| 543 | |
| 544 RenderCustomPaint createNode() => new RenderCustomPaint(callback: callback); | |
| 545 | |
| 546 void syncRenderObject(CustomPaint old) { | |
| 547 super.syncRenderObject(old); | |
| 548 root.callback = callback; | |
| 549 } | |
| 550 | |
| 551 void remove() { | |
| 552 root.callback = null; | |
| 553 super.remove(); | |
| 554 } | |
| 555 | |
| 556 } | |
| 557 | |
| 558 abstract class MultiChildRenderObjectWrapper extends RenderObjectWrapper { | |
| 559 | |
| 560 // In MultiChildRenderObjectWrapper subclasses, slots are RenderObject nodes | |
| 561 // to use as the "insert before" sibling in ContainerRenderObjectMixin.add() c
alls | |
| 562 | |
| 563 MultiChildRenderObjectWrapper({ | |
| 564 Object key, | |
| 565 List<UINode> children | |
| 566 }) : this.children = children == null ? const [] : children, | |
| 567 super(key: key) { | |
| 568 assert(!_debugHasDuplicateIds()); | |
| 569 } | |
| 570 | |
| 571 final List<UINode> children; | |
| 572 | |
| 573 void insert(RenderObjectWrapper child, dynamic slot) { | |
| 574 final root = this.root; // TODO(ianh): Remove this once the analyzer is clev
erer | |
| 575 assert(slot == null || slot is RenderObject); | |
| 576 assert(root is ContainerRenderObjectMixin); | |
| 577 root.add(child.root, before: slot); | |
| 578 assert(root == this.root); // TODO(ianh): Remove this once the analyzer is c
leverer | |
| 579 } | |
| 580 | |
| 581 void removeChild(UINode node) { | |
| 582 final root = this.root; // TODO(ianh): Remove this once the analyzer is clev
erer | |
| 583 assert(root is ContainerRenderObjectMixin); | |
| 584 assert(node.root.parent == root); | |
| 585 root.remove(node.root); | |
| 586 super.removeChild(node); | |
| 587 assert(root == this.root); // TODO(ianh): Remove this once the analyzer is c
leverer | |
| 588 } | |
| 589 | |
| 590 void remove() { | |
| 591 assert(children != null); | |
| 592 for (var child in children) { | |
| 593 assert(child != null); | |
| 594 removeChild(child); | |
| 595 } | |
| 596 super.remove(); | |
| 597 } | |
| 598 | |
| 599 bool _debugHasDuplicateIds() { | |
| 600 var idSet = new HashSet<String>(); | |
| 601 for (var child in children) { | |
| 602 assert(child != null); | |
| 603 if (child.interchangeable) | |
| 604 continue; // when these nodes are reordered, we just reassign the data | |
| 605 | |
| 606 if (!idSet.add(child._key)) { | |
| 607 throw '''If multiple non-interchangeable nodes of the same type exist as
children | |
| 608 of another node, they must have unique keys. | |
| 609 Duplicate: "${child._key}"'''; | |
| 610 } | |
| 611 } | |
| 612 return false; | |
| 613 } | |
| 614 | |
| 615 void syncRenderObject(MultiChildRenderObjectWrapper old) { | |
| 616 super.syncRenderObject(old); | |
| 617 | |
| 618 final root = this.root; // TODO(ianh): Remove this once the analyzer is clev
erer | |
| 619 if (root is! ContainerRenderObjectMixin) | |
| 620 return; | |
| 621 | |
| 622 var startIndex = 0; | |
| 623 var endIndex = children.length; | |
| 624 | |
| 625 var oldChildren = old == null ? [] : old.children; | |
| 626 var oldStartIndex = 0; | |
| 627 var oldEndIndex = oldChildren.length; | |
| 628 | |
| 629 RenderObject nextSibling = null; | |
| 630 UINode currentNode = null; | |
| 631 UINode oldNode = null; | |
| 632 | |
| 633 void sync(int atIndex) { | |
| 634 children[atIndex] = syncChild(currentNode, oldNode, nextSibling); | |
| 635 assert(children[atIndex] != null); | |
| 636 } | |
| 637 | |
| 638 // Scan backwards from end of list while nodes can be directly synced | |
| 639 // without reordering. | |
| 640 while (endIndex > startIndex && oldEndIndex > oldStartIndex) { | |
| 641 currentNode = children[endIndex - 1]; | |
| 642 oldNode = oldChildren[oldEndIndex - 1]; | |
| 643 | |
| 644 if (currentNode._key != oldNode._key) { | |
| 645 break; | |
| 646 } | |
| 647 | |
| 648 endIndex--; | |
| 649 oldEndIndex--; | |
| 650 sync(endIndex); | |
| 651 } | |
| 652 | |
| 653 HashMap<String, UINode> oldNodeIdMap = null; | |
| 654 | |
| 655 bool oldNodeReordered(String key) { | |
| 656 return oldNodeIdMap != null && | |
| 657 oldNodeIdMap.containsKey(key) && | |
| 658 oldNodeIdMap[key] == null; | |
| 659 } | |
| 660 | |
| 661 void advanceOldStartIndex() { | |
| 662 oldStartIndex++; | |
| 663 while (oldStartIndex < oldEndIndex && | |
| 664 oldNodeReordered(oldChildren[oldStartIndex]._key)) { | |
| 665 oldStartIndex++; | |
| 666 } | |
| 667 } | |
| 668 | |
| 669 void ensureOldIdMap() { | |
| 670 if (oldNodeIdMap != null) | |
| 671 return; | |
| 672 | |
| 673 oldNodeIdMap = new HashMap<String, UINode>(); | |
| 674 for (int i = oldStartIndex; i < oldEndIndex; i++) { | |
| 675 var node = oldChildren[i]; | |
| 676 if (!node.interchangeable) | |
| 677 oldNodeIdMap.putIfAbsent(node._key, () => node); | |
| 678 } | |
| 679 } | |
| 680 | |
| 681 bool searchForOldNode() { | |
| 682 if (currentNode.interchangeable) | |
| 683 return false; // never re-order these nodes | |
| 684 | |
| 685 ensureOldIdMap(); | |
| 686 oldNode = oldNodeIdMap[currentNode._key]; | |
| 687 if (oldNode == null) | |
| 688 return false; | |
| 689 | |
| 690 oldNodeIdMap[currentNode._key] = null; // mark it reordered | |
| 691 assert(root is ContainerRenderObjectMixin); | |
| 692 assert(old.root is ContainerRenderObjectMixin); | |
| 693 assert(oldNode.root != null); | |
| 694 | |
| 695 (old.root as ContainerRenderObjectMixin).remove(oldNode.root); // TODO(ian
h): Remove cast once the analyzer is cleverer | |
| 696 root.add(oldNode.root, before: nextSibling); | |
| 697 | |
| 698 return true; | |
| 699 } | |
| 700 | |
| 701 // Scan forwards, this time we may re-order; | |
| 702 nextSibling = root.firstChild; | |
| 703 while (startIndex < endIndex && oldStartIndex < oldEndIndex) { | |
| 704 currentNode = children[startIndex]; | |
| 705 oldNode = oldChildren[oldStartIndex]; | |
| 706 | |
| 707 if (currentNode._key == oldNode._key) { | |
| 708 assert(currentNode.runtimeType == oldNode.runtimeType); | |
| 709 nextSibling = root.childAfter(nextSibling); | |
| 710 sync(startIndex); | |
| 711 startIndex++; | |
| 712 advanceOldStartIndex(); | |
| 713 continue; | |
| 714 } | |
| 715 | |
| 716 oldNode = null; | |
| 717 searchForOldNode(); | |
| 718 sync(startIndex); | |
| 719 startIndex++; | |
| 720 } | |
| 721 | |
| 722 // New insertions | |
| 723 oldNode = null; | |
| 724 while (startIndex < endIndex) { | |
| 725 currentNode = children[startIndex]; | |
| 726 sync(startIndex); | |
| 727 startIndex++; | |
| 728 } | |
| 729 | |
| 730 // Removals | |
| 731 currentNode = null; | |
| 732 while (oldStartIndex < oldEndIndex) { | |
| 733 oldNode = oldChildren[oldStartIndex]; | |
| 734 removeChild(oldNode); | |
| 735 advanceOldStartIndex(); | |
| 736 } | |
| 737 | |
| 738 assert(root == this.root); // TODO(ianh): Remove this once the analyzer is c
leverer | |
| 739 } | |
| 740 | |
| 741 } | |
| 742 | |
| 743 class Block extends MultiChildRenderObjectWrapper { | |
| 744 | |
| 745 Block(List<UINode> children, { Object key }) | |
| 746 : super(key: key, children: children); | |
| 747 | |
| 748 RenderBlock get root { RenderBlock result = super.root; return result; } | |
| 749 RenderBlock createNode() => new RenderBlock(); | |
| 750 | |
| 751 } | |
| 752 | |
| 753 class Stack extends MultiChildRenderObjectWrapper { | |
| 754 | |
| 755 Stack(List<UINode> children, { Object key }) | |
| 756 : super(key: key, children: children); | |
| 757 | |
| 758 RenderStack get root { RenderStack result = super.root; return result; } | |
| 759 RenderStack createNode() => new RenderStack(); | |
| 760 | |
| 761 } | |
| 762 | |
| 763 class StackPositionedChild extends ParentDataNode { | |
| 764 StackPositionedChild(UINode content, { | |
| 765 double top, double right, double bottom, double left | |
| 766 }) : super(content, new StackParentData()..top = top | |
| 767 ..right = right | |
| 768 ..bottom = bottom | |
| 769 ..left = left); | |
| 770 } | |
| 771 | |
| 772 class Paragraph extends RenderObjectWrapper { | |
| 773 | |
| 774 Paragraph({ Object key, this.text }) : super(key: key); | |
| 775 | |
| 776 RenderParagraph get root { RenderParagraph result = super.root; return result;
} | |
| 777 RenderParagraph createNode() => new RenderParagraph(text: text); | |
| 778 | |
| 779 final String text; | |
| 780 | |
| 781 void syncRenderObject(UINode old) { | |
| 782 super.syncRenderObject(old); | |
| 783 root.text = text; | |
| 784 } | |
| 785 | |
| 786 void insert(RenderObjectWrapper child, dynamic slot) { | |
| 787 assert(false); | |
| 788 // Paragraph does not support having children currently | |
| 789 } | |
| 790 | |
| 791 } | |
| 792 | |
| 793 class Text extends Component { | |
| 794 Text(this.data) : super(key: '*text*'); | |
| 795 final String data; | |
| 796 bool get interchangeable => true; | |
| 797 UINode build() => new Paragraph(text: data); | |
| 798 } | |
| 799 | |
| 800 class Flex extends MultiChildRenderObjectWrapper { | |
| 801 | |
| 802 Flex(List<UINode> children, { | |
| 803 Object key, | |
| 804 this.direction: FlexDirection.horizontal, | |
| 805 this.justifyContent: FlexJustifyContent.flexStart, | |
| 806 this.alignItems: FlexAlignItems.center | |
| 807 }) : super(key: key, children: children); | |
| 808 | |
| 809 RenderFlex get root { RenderFlex result = super.root; return result; } | |
| 810 RenderFlex createNode() => new RenderFlex(direction: this.direction); | |
| 811 | |
| 812 final FlexDirection direction; | |
| 813 final FlexJustifyContent justifyContent; | |
| 814 final FlexAlignItems alignItems; | |
| 815 | |
| 816 void syncRenderObject(UINode old) { | |
| 817 super.syncRenderObject(old); | |
| 818 root.direction = direction; | |
| 819 root.justifyContent = justifyContent; | |
| 820 root.alignItems = alignItems; | |
| 821 } | |
| 822 | |
| 823 } | |
| 824 | |
| 825 class FlexExpandingChild extends ParentDataNode { | |
| 826 FlexExpandingChild(UINode content, { int flex: 1, Object key }) | |
| 827 : super(content, new FlexBoxParentData()..flex = flex, key: key); | |
| 828 } | |
| 829 | |
| 830 class Image extends RenderObjectWrapper { | |
| 831 | |
| 832 Image({ | |
| 833 Object key, | |
| 834 this.src, | |
| 835 this.size | |
| 836 }) : super(key: key); | |
| 837 | |
| 838 RenderImage get root { RenderImage result = super.root; return result; } | |
| 839 RenderImage createNode() => new RenderImage(this.src, this.size); | |
| 840 | |
| 841 final String src; | |
| 842 final Size size; | |
| 843 | |
| 844 void syncRenderObject(UINode old) { | |
| 845 super.syncRenderObject(old); | |
| 846 root.src = src; | |
| 847 root.requestedSize = size; | |
| 848 } | |
| 849 | |
| 850 void insert(RenderObjectWrapper child, dynamic slot) { | |
| 851 assert(false); | |
| 852 // Image does not support having children currently | |
| 853 } | |
| 854 | |
| 855 } | |
| 856 | |
| 857 Set<Component> _dirtyComponents = new Set<Component>(); | |
| 858 bool _buildScheduled = false; | |
| 859 bool _inRenderDirtyComponents = false; | |
| 860 | |
| 861 void _buildDirtyComponents() { | |
| 862 //_tracing.begin('fn::_buildDirtyComponents'); | |
| 863 | |
| 864 Stopwatch sw; | |
| 865 if (_shouldLogRenderDuration) | |
| 866 sw = new Stopwatch()..start(); | |
| 867 | |
| 868 try { | |
| 869 _inRenderDirtyComponents = true; | |
| 870 | |
| 871 List<Component> sortedDirtyComponents = _dirtyComponents.toList(); | |
| 872 sortedDirtyComponents.sort((Component a, Component b) => a._order - b._order
); | |
| 873 for (var comp in sortedDirtyComponents) { | |
| 874 comp._buildIfDirty(); | |
| 875 } | |
| 876 | |
| 877 _dirtyComponents.clear(); | |
| 878 _buildScheduled = false; | |
| 879 } finally { | |
| 880 _inRenderDirtyComponents = false; | |
| 881 } | |
| 882 | |
| 883 UINode._notifyMountStatusChanged(); | |
| 884 | |
| 885 if (_shouldLogRenderDuration) { | |
| 886 sw.stop(); | |
| 887 print('Render took ${sw.elapsedMicroseconds} microseconds'); | |
| 888 } | |
| 889 | |
| 890 //_tracing.end('fn::_buildDirtyComponents'); | |
| 891 } | |
| 892 | |
| 893 void _scheduleComponentForRender(Component c) { | |
| 894 assert(!_inRenderDirtyComponents); | |
| 895 _dirtyComponents.add(c); | |
| 896 | |
| 897 if (!_buildScheduled) { | |
| 898 _buildScheduled = true; | |
| 899 new Future.microtask(_buildDirtyComponents); | |
| 900 } | |
| 901 } | |
| 902 | |
| 903 abstract class Component extends UINode { | |
| 904 | |
| 905 Component({ Object key, bool stateful }) | |
| 906 : _stateful = stateful != null ? stateful : false, | |
| 907 _order = _currentOrder + 1, | |
| 908 super(key: key); | |
| 909 | |
| 910 Component.fromArgs(Object key, bool stateful) | |
| 911 : this(key: key, stateful: stateful); | |
| 912 | |
| 913 static Component _currentlyBuilding; | |
| 914 bool get _isBuilding => _currentlyBuilding == this; | |
| 915 | |
| 916 bool _stateful; | |
| 917 bool _dirty = true; | |
| 918 bool _disqualifiedFromEverAppearingAgain = false; | |
| 919 | |
| 920 UINode _built; | |
| 921 dynamic _slot; // cached slot from the last time we were synced | |
| 922 | |
| 923 void didMount() { | |
| 924 assert(!_disqualifiedFromEverAppearingAgain); | |
| 925 super.didMount(); | |
| 926 } | |
| 927 | |
| 928 void remove() { | |
| 929 assert(_built != null); | |
| 930 assert(root != null); | |
| 931 removeChild(_built); | |
| 932 _built = null; | |
| 933 super.remove(); | |
| 934 } | |
| 935 | |
| 936 bool _retainStatefulNodeIfPossible(UINode old) { | |
| 937 assert(!_disqualifiedFromEverAppearingAgain); | |
| 938 | |
| 939 Component oldComponent = old as Component; | |
| 940 if (oldComponent == null || !oldComponent._stateful) | |
| 941 return false; | |
| 942 | |
| 943 assert(key == oldComponent.key); | |
| 944 | |
| 945 // Make |this|, the newly-created object, into the "old" Component, and kill
it | |
| 946 _stateful = false; | |
| 947 _built = oldComponent._built; | |
| 948 assert(_built != null); | |
| 949 _disqualifiedFromEverAppearingAgain = true; | |
| 950 | |
| 951 // Make |oldComponent| the "new" component | |
| 952 oldComponent._built = null; | |
| 953 oldComponent._dirty = true; | |
| 954 oldComponent.syncFields(this); | |
| 955 return true; | |
| 956 } | |
| 957 | |
| 958 // This is called by _retainStatefulNodeIfPossible(), during | |
| 959 // syncChild(), just before _sync() is called. | |
| 960 // This must be implemented on any subclass that can become stateful | |
| 961 // (but don't call super.syncFields() if you inherit directly from | |
| 962 // Component, since that'll fire an assert). | |
| 963 // If you don't ever become stateful, then don't override this. | |
| 964 void syncFields(Component source) { | |
| 965 assert(false); | |
| 966 } | |
| 967 | |
| 968 final int _order; | |
| 969 static int _currentOrder = 0; | |
| 970 | |
| 971 /* There are three cases here: | |
| 972 * 1) Building for the first time: | |
| 973 * assert(_built == null && old == null) | |
| 974 * 2) Re-building (because a dirty flag got set): | |
| 975 * assert(_built != null && old == null) | |
| 976 * 3) Syncing against an old version | |
| 977 * assert(_built == null && old != null) | |
| 978 */ | |
| 979 void _sync(UINode old, dynamic slot) { | |
| 980 assert(_built == null || old == null); | |
| 981 assert(!_disqualifiedFromEverAppearingAgain); | |
| 982 | |
| 983 Component oldComponent = old as Component; | |
| 984 | |
| 985 _slot = slot; | |
| 986 | |
| 987 var oldBuilt; | |
| 988 if (oldComponent == null) { | |
| 989 oldBuilt = _built; | |
| 990 } else { | |
| 991 assert(_built == null); | |
| 992 oldBuilt = oldComponent._built; | |
| 993 } | |
| 994 | |
| 995 int lastOrder = _currentOrder; | |
| 996 _currentOrder = _order; | |
| 997 _currentlyBuilding = this; | |
| 998 _built = build(); | |
| 999 assert(_built != null); | |
| 1000 _currentlyBuilding = null; | |
| 1001 _currentOrder = lastOrder; | |
| 1002 | |
| 1003 _built = syncChild(_built, oldBuilt, slot); | |
| 1004 assert(_built != null); | |
| 1005 _dirty = false; | |
| 1006 _root = _built.root; | |
| 1007 assert(_root == root); // in case a subclass reintroduces it | |
| 1008 assert(root != null); | |
| 1009 } | |
| 1010 | |
| 1011 void _buildIfDirty() { | |
| 1012 assert(!_disqualifiedFromEverAppearingAgain); | |
| 1013 if (!_dirty || !_mounted) | |
| 1014 return; | |
| 1015 | |
| 1016 assert(root != null); | |
| 1017 _sync(null, _slot); | |
| 1018 } | |
| 1019 | |
| 1020 void scheduleBuild() { | |
| 1021 setState(() {}); | |
| 1022 } | |
| 1023 | |
| 1024 void setState(Function fn()) { | |
| 1025 assert(!_disqualifiedFromEverAppearingAgain); | |
| 1026 _stateful = true; | |
| 1027 fn(); | |
| 1028 if (_isBuilding || _dirty || !_mounted) | |
| 1029 return; | |
| 1030 | |
| 1031 _dirty = true; | |
| 1032 _scheduleComponentForRender(this); | |
| 1033 } | |
| 1034 | |
| 1035 UINode build(); | |
| 1036 | |
| 1037 } | |
| 1038 | |
| 1039 class Container extends Component { | |
| 1040 | |
| 1041 Container({ | |
| 1042 Object key, | |
| 1043 this.child, | |
| 1044 this.constraints, | |
| 1045 this.decoration, | |
| 1046 this.width, | |
| 1047 this.height, | |
| 1048 this.margin, | |
| 1049 this.padding, | |
| 1050 this.transform | |
| 1051 }) : super(key: key); | |
| 1052 | |
| 1053 final UINode child; | |
| 1054 final BoxConstraints constraints; | |
| 1055 final BoxDecoration decoration; | |
| 1056 final EdgeDims margin; | |
| 1057 final EdgeDims padding; | |
| 1058 final Matrix4 transform; | |
| 1059 final double width; | |
| 1060 final double height; | |
| 1061 | |
| 1062 UINode build() { | |
| 1063 UINode current = child; | |
| 1064 | |
| 1065 if (child == null && width == null && height == null) | |
| 1066 current = new SizedBox(); | |
| 1067 | |
| 1068 if (padding != null) | |
| 1069 current = new Padding(padding: padding, child: current); | |
| 1070 | |
| 1071 if (decoration != null) | |
| 1072 current = new DecoratedBox(decoration: decoration, child: current); | |
| 1073 | |
| 1074 if (width != null || height != null) | |
| 1075 current = new SizedBox( | |
| 1076 width: width == null ? double.INFINITY : width, | |
| 1077 height: height == null ? double.INFINITY : height, | |
| 1078 child: current | |
| 1079 ); | |
| 1080 | |
| 1081 if (constraints != null) | |
| 1082 current = new ConstrainedBox(constraints: constraints, child: current); | |
| 1083 | |
| 1084 if (margin != null) | |
| 1085 current = new Padding(padding: margin, child: current); | |
| 1086 | |
| 1087 if (transform != null) | |
| 1088 current = new Transform(transform: transform, child: current); | |
| 1089 | |
| 1090 return current; | |
| 1091 } | |
| 1092 | |
| 1093 } | |
| 1094 | |
| 1095 class UINodeAppView extends AppView { | |
| 1096 | |
| 1097 UINodeAppView() { | |
| 1098 assert(_appView == null); | |
| 1099 } | |
| 1100 | |
| 1101 static UINodeAppView _appView; | |
| 1102 static void initUINodeAppView() { | |
| 1103 if (_appView == null) | |
| 1104 _appView = new UINodeAppView(); | |
| 1105 } | |
| 1106 | |
| 1107 void dispatchEvent(sky.Event event, HitTestResult result) { | |
| 1108 assert(_appView == this); | |
| 1109 super.dispatchEvent(event, result); | |
| 1110 for (HitTestEntry entry in result.path.reversed) { | |
| 1111 UINode target = RenderObjectWrapper._getMounted(entry.target); | |
| 1112 if (target == null) | |
| 1113 continue; | |
| 1114 RenderObject targetRoot = target.root; | |
| 1115 while (target != null && target.root == targetRoot) { | |
| 1116 if (target is EventListenerNode) | |
| 1117 target._handleEvent(event); | |
| 1118 target = target._parent; | |
| 1119 } | |
| 1120 } | |
| 1121 } | |
| 1122 | |
| 1123 } | |
| 1124 | |
| 1125 abstract class AbstractUINodeRoot extends Component { | |
| 1126 | |
| 1127 AbstractUINodeRoot() : super(stateful: true) { | |
| 1128 UINodeAppView.initUINodeAppView(); | |
| 1129 _mounted = true; | |
| 1130 _scheduleComponentForRender(this); | |
| 1131 } | |
| 1132 | |
| 1133 void syncFields(AbstractUINodeRoot source) { | |
| 1134 assert(false); | |
| 1135 // if we get here, it implies that we have a parent | |
| 1136 } | |
| 1137 | |
| 1138 void _buildIfDirty() { | |
| 1139 assert(_dirty); | |
| 1140 assert(_mounted); | |
| 1141 assert(parent == null); | |
| 1142 _sync(null, null); | |
| 1143 } | |
| 1144 | |
| 1145 } | |
| 1146 | |
| 1147 abstract class App extends AbstractUINodeRoot { | |
| 1148 | |
| 1149 App(); | |
| 1150 | |
| 1151 AppView get appView => UINodeAppView._appView; | |
| 1152 | |
| 1153 void _buildIfDirty() { | |
| 1154 super._buildIfDirty(); | |
| 1155 | |
| 1156 if (root.parent == null) { | |
| 1157 // we haven't attached it yet | |
| 1158 UINodeAppView._appView.root = root; | |
| 1159 } | |
| 1160 assert(root.parent is RenderView); | |
| 1161 } | |
| 1162 | |
| 1163 } | |
| 1164 | |
| 1165 typedef UINode Builder(); | |
| 1166 | |
| 1167 class RenderNodeToUINodeAdapter extends AbstractUINodeRoot { | |
| 1168 | |
| 1169 RenderNodeToUINodeAdapter( | |
| 1170 RenderObjectWithChildMixin<RenderBox> container, | |
| 1171 this.builder | |
| 1172 ) : _container = container { | |
| 1173 assert(builder != null); | |
| 1174 } | |
| 1175 | |
| 1176 RenderObjectWithChildMixin<RenderBox> _container; | |
| 1177 RenderObjectWithChildMixin<RenderBox> get container => _container; | |
| 1178 void set container(RenderObjectWithChildMixin<RenderBox> value) { | |
| 1179 if (_container != value) { | |
| 1180 assert(value.child == null); | |
| 1181 if (root != null) { | |
| 1182 assert(_container.child == root); | |
| 1183 _container.child = null; | |
| 1184 } | |
| 1185 _container = value; | |
| 1186 if (root != null) { | |
| 1187 _container.child = root; | |
| 1188 assert(_container.child == root); | |
| 1189 } | |
| 1190 } | |
| 1191 } | |
| 1192 | |
| 1193 final Builder builder; | |
| 1194 | |
| 1195 void _buildIfDirty() { | |
| 1196 super._buildIfDirty(); | |
| 1197 if (root.parent == null) { | |
| 1198 // we haven't attached it yet | |
| 1199 assert(_container.child == null); | |
| 1200 _container.child = root; | |
| 1201 } | |
| 1202 assert(root.parent == _container); | |
| 1203 } | |
| 1204 | |
| 1205 UINode build() => builder(); | |
| 1206 | |
| 1207 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1177243002:
Refactor fn2.dart, since it breached our 1000-line threshold. (Closed)
Base URL: https://github.com/domokit/mojo.git@master