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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 'dart:async'; | |
| 8 import 'dart:collection'; | |
| 9 import 'dart:mirrors'; | |
| 10 import 'dart:sky' as sky; | |
| 11 import 'reflect.dart' as reflect; | |
| 12 import 'layout.dart'; | |
| 13 | |
| 14 export 'layout.dart' show Style; | |
| 15 | |
| 16 final sky.Tracing _tracing = sky.window.tracing; | |
| 17 | |
| 18 final bool _shouldLogRenderDuration = false; | |
| 19 final bool _shouldTrace = false; | |
| 20 | |
| 21 enum _SyncOperation { IDENTICAL, INSERTION, STATEFUL, STATELESS, REMOVAL } | |
| 22 | |
| 23 /* | |
| 24 * All Effen nodes derive from UINode. All nodes have a _parent, a _key and | |
| 25 * can be sync'd. | |
| 26 */ | |
| 27 abstract class UINode { | |
| 28 String _key; | |
| 29 UINode _parent; | |
| 30 UINode get parent => _parent; | |
| 31 RenderCSS _root; | |
| 32 bool _defunct = false; | |
| 33 | |
| 34 UINode({ Object key }) { | |
| 35 _key = key == null ? "$runtimeType" : "$runtimeType-$key"; | |
| 36 assert(this is App || _inRenderDirtyComponents); // you should not build the
UI tree ahead of time, build it only during build() | |
| 37 } | |
| 38 | |
| 39 // Subclasses which implements Nodes that become stateful may return true | |
| 40 // if the |old| node has become stateful and should be retained. | |
| 41 bool _willSync(UINode old) => false; | |
| 42 | |
| 43 bool get interchangeable => false; // if true, then keys can be duplicated | |
| 44 | |
| 45 void _sync(UINode old, dynamic slot); | |
| 46 // 'slot' is the identifier that the parent RenderNodeWrapper uses to know | |
| 47 // where to put this descendant | |
| 48 | |
| 49 void _remove() { | |
| 50 _defunct = true; | |
| 51 _root = null; | |
| 52 handleRemoved(); | |
| 53 } | |
| 54 void handleRemoved() { } | |
| 55 | |
| 56 UINode findAncestor(Type targetType) { | |
| 57 var ancestor = _parent; | |
| 58 while (ancestor != null && !reflectClass(ancestor.runtimeType).isSubtypeOf(r
eflectClass(targetType))) | |
| 59 ancestor = ancestor._parent; | |
| 60 return ancestor; | |
| 61 } | |
| 62 | |
| 63 int _nodeDepth; | |
| 64 void _ensureDepth() { | |
| 65 if (_nodeDepth == null) { | |
| 66 if (_parent != null) { | |
| 67 _parent._ensureDepth(); | |
| 68 _nodeDepth = _parent._nodeDepth + 1; | |
| 69 } else { | |
| 70 _nodeDepth = 0; | |
| 71 } | |
| 72 } | |
| 73 } | |
| 74 | |
| 75 void _trace(String message) { | |
| 76 if (!_shouldTrace) | |
| 77 return; | |
| 78 | |
| 79 _ensureDepth(); | |
| 80 print((' ' * _nodeDepth) + message); | |
| 81 } | |
| 82 | |
| 83 void _traceSync(_SyncOperation op, String key) { | |
| 84 if (!_shouldTrace) | |
| 85 return; | |
| 86 | |
| 87 String opString = op.toString().toLowerCase(); | |
| 88 String outString = opString.substring(opString.indexOf('.') + 1); | |
| 89 _trace('_sync($outString) $key'); | |
| 90 } | |
| 91 | |
| 92 void _removeChild(UINode node) { | |
| 93 _traceSync(_SyncOperation.REMOVAL, node._key); | |
| 94 node._remove(); | |
| 95 } | |
| 96 | |
| 97 // Returns the child which should be retained as the child of this node. | |
| 98 UINode _syncChild(UINode node, UINode oldNode, dynamic slot) { | |
| 99 assert(node != null); | |
| 100 assert(oldNode == null || node._key == oldNode._key); | |
| 101 | |
| 102 if (node == oldNode) { | |
| 103 _traceSync(_SyncOperation.IDENTICAL, node._key); | |
| 104 return node; // Nothing to do. Subtrees must be identical. | |
| 105 } | |
| 106 | |
| 107 // TODO(rafaelw): This eagerly removes the old DOM. It may be that a | |
| 108 // new component was built that could re-use some of it. Consider | |
| 109 // syncing the new VDOM against the old one. | |
| 110 if (oldNode != null && node._key != oldNode._key) { | |
| 111 _removeChild(oldNode); | |
| 112 } | |
| 113 | |
| 114 if (node._willSync(oldNode)) { | |
| 115 _traceSync(_SyncOperation.STATEFUL, node._key); | |
| 116 oldNode._sync(node, slot); | |
| 117 node._defunct = true; | |
| 118 assert(oldNode._root is RenderCSS); | |
| 119 return oldNode; | |
| 120 } | |
| 121 | |
| 122 assert(!node._defunct); | |
| 123 node._parent = this; | |
| 124 | |
| 125 if (oldNode == null) { | |
| 126 _traceSync(_SyncOperation.INSERTION, node._key); | |
| 127 } else { | |
| 128 _traceSync(_SyncOperation.STATELESS, node._key); | |
| 129 } | |
| 130 node._sync(oldNode, slot); | |
| 131 if (oldNode != null) | |
| 132 oldNode._defunct = true; | |
| 133 | |
| 134 assert(node._root is RenderCSS); | |
| 135 return node; | |
| 136 } | |
| 137 } | |
| 138 | |
| 139 abstract class ContentNode extends UINode { | |
| 140 UINode content; | |
| 141 | |
| 142 ContentNode(UINode content) : this.content = content, super(key: content._key)
; | |
| 143 | |
| 144 void _sync(UINode old, dynamic slot) { | |
| 145 UINode oldContent = old == null ? null : (old as ContentNode).content; | |
| 146 content = _syncChild(content, oldContent, slot); | |
| 147 assert(content._root != null); | |
| 148 _root = content._root; | |
| 149 } | |
| 150 | |
| 151 void _remove() { | |
| 152 if (content != null) | |
| 153 _removeChild(content); | |
| 154 super._remove(); | |
| 155 } | |
| 156 } | |
| 157 | |
| 158 class StyleNode extends ContentNode { | |
| 159 final Style style; | |
| 160 | |
| 161 StyleNode(UINode content, this.style): super(content); | |
| 162 } | |
| 163 | |
| 164 class ParentDataNode extends ContentNode { | |
| 165 final ParentData parentData; | |
| 166 | |
| 167 ParentDataNode(UINode content, this.parentData): super(content); | |
| 168 } | |
| 169 | |
| 170 typedef GestureEventListener(sky.GestureEvent e); | |
| 171 typedef PointerEventListener(sky.PointerEvent e); | |
| 172 typedef EventListener(sky.Event e); | |
| 173 | |
| 174 class EventListenerNode extends ContentNode { | |
| 175 final Map<String, sky.EventListener> listeners; | |
| 176 | |
| 177 static final Set<String> _registeredEvents = new HashSet<String>(); | |
| 178 | |
| 179 static Map<String, sky.EventListener> _createListeners({ | |
| 180 EventListener onWheel, | |
| 181 GestureEventListener onGestureFlingCancel, | |
| 182 GestureEventListener onGestureFlingStart, | |
| 183 GestureEventListener onGestureScrollStart, | |
| 184 GestureEventListener onGestureScrollUpdate, | |
| 185 GestureEventListener onGestureTap, | |
| 186 GestureEventListener onGestureTapDown, | |
| 187 PointerEventListener onPointerCancel, | |
| 188 PointerEventListener onPointerDown, | |
| 189 PointerEventListener onPointerMove, | |
| 190 PointerEventListener onPointerUp, | |
| 191 Map<String, sky.EventListener> custom | |
| 192 }) { | |
| 193 var listeners = custom != null ? | |
| 194 new HashMap<String, sky.EventListener>.from(custom) : | |
| 195 new HashMap<String, sky.EventListener>(); | |
| 196 | |
| 197 if (onWheel != null) | |
| 198 listeners['wheel'] = onWheel; | |
| 199 if (onGestureFlingCancel != null) | |
| 200 listeners['gestureflingcancel'] = onGestureFlingCancel; | |
| 201 if (onGestureFlingStart != null) | |
| 202 listeners['gestureflingstart'] = onGestureFlingStart; | |
| 203 if (onGestureScrollStart != null) | |
| 204 listeners['gesturescrollstart'] = onGestureScrollStart; | |
| 205 if (onGestureScrollUpdate != null) | |
| 206 listeners['gesturescrollupdate'] = onGestureScrollUpdate; | |
| 207 if (onGestureTap != null) | |
| 208 listeners['gesturetap'] = onGestureTap; | |
| 209 if (onGestureTapDown != null) | |
| 210 listeners['gesturetapdown'] = onGestureTapDown; | |
| 211 if (onPointerCancel != null) | |
| 212 listeners['pointercancel'] = onPointerCancel; | |
| 213 if (onPointerDown != null) | |
| 214 listeners['pointerdown'] = onPointerDown; | |
| 215 if (onPointerMove != null) | |
| 216 listeners['pointermove'] = onPointerMove; | |
| 217 if (onPointerUp != null) | |
| 218 listeners['pointerup'] = onPointerUp; | |
| 219 | |
| 220 return listeners; | |
| 221 } | |
| 222 | |
| 223 EventListenerNode(UINode content, { | |
| 224 EventListener onWheel, | |
| 225 GestureEventListener onGestureFlingCancel, | |
| 226 GestureEventListener onGestureFlingStart, | |
| 227 GestureEventListener onGestureScrollStart, | |
| 228 GestureEventListener onGestureScrollUpdate, | |
| 229 GestureEventListener onGestureTap, | |
| 230 GestureEventListener onGestureTapDown, | |
| 231 PointerEventListener onPointerCancel, | |
| 232 PointerEventListener onPointerDown, | |
| 233 PointerEventListener onPointerMove, | |
| 234 PointerEventListener onPointerUp, | |
| 235 Map<String, sky.EventListener> custom | |
| 236 }) : listeners = _createListeners( | |
| 237 onWheel: onWheel, | |
| 238 onGestureFlingCancel: onGestureFlingCancel, | |
| 239 onGestureFlingStart: onGestureFlingStart, | |
| 240 onGestureScrollUpdate: onGestureScrollUpdate, | |
| 241 onGestureScrollStart: onGestureScrollStart, | |
| 242 onGestureTap: onGestureTap, | |
| 243 onGestureTapDown: onGestureTapDown, | |
| 244 onPointerCancel: onPointerCancel, | |
| 245 onPointerDown: onPointerDown, | |
| 246 onPointerMove: onPointerMove, | |
| 247 onPointerUp: onPointerUp, | |
| 248 custom: custom | |
| 249 ), | |
| 250 super(content); | |
| 251 | |
| 252 void _handleEvent(sky.Event e) { | |
| 253 sky.EventListener listener = listeners[e.type]; | |
| 254 if (listener != null) { | |
| 255 listener(e); | |
| 256 } | |
| 257 } | |
| 258 | |
| 259 static void _dispatchEvent(sky.Event e) { | |
| 260 UINode target = RenderNodeWrapper._getMounted(bridgeEventTargetToRenderNode(
e.target)); | |
| 261 | |
| 262 // TODO(rafaelw): StopPropagation? | |
| 263 while (target != null) { | |
| 264 if (target is EventListenerNode) { | |
| 265 target._handleEvent(e); | |
| 266 } | |
| 267 | |
| 268 target = target._parent; | |
| 269 } | |
| 270 } | |
| 271 | |
| 272 static void _ensureDocumentListener(String eventType) { | |
| 273 if (_registeredEvents.add(eventType)) { | |
| 274 sky.document.addEventListener(eventType, _dispatchEvent); | |
| 275 } | |
| 276 } | |
| 277 | |
| 278 void _sync(UINode old, dynamic slot) { | |
| 279 for (var type in listeners.keys) { | |
| 280 _ensureDocumentListener(type); | |
| 281 } | |
| 282 super._sync(old, slot); | |
| 283 } | |
| 284 } | |
| 285 | |
| 286 /* | |
| 287 * RenderNodeWrappers correspond to a desired state of a RenderCSS. | |
| 288 * They are fully immutable, with one exception: A UINode which is a | |
| 289 * Component which lives within an OneChildListRenderNodeWrapper's | |
| 290 * children list, may be replaced with the "old" instance if it has | |
| 291 * become stateful. | |
| 292 */ | |
| 293 abstract class RenderNodeWrapper extends UINode { | |
| 294 | |
| 295 static final Map<RenderCSS, RenderNodeWrapper> _nodeMap = | |
| 296 new HashMap<RenderCSS, RenderNodeWrapper>(); | |
| 297 | |
| 298 static RenderNodeWrapper _getMounted(RenderCSS node) => _nodeMap[node]; | |
| 299 | |
| 300 RenderNodeWrapper({ | |
| 301 Object key, | |
| 302 this.style, | |
| 303 this.inlineStyle | |
| 304 }) : super(key: key); | |
| 305 | |
| 306 final Style style; | |
| 307 final String inlineStyle; | |
| 308 | |
| 309 RenderCSS _createNode(); | |
| 310 RenderNodeWrapper get _emptyNode; | |
| 311 | |
| 312 void insert(RenderNodeWrapper child, dynamic slot); | |
| 313 | |
| 314 void _sync(UINode old, dynamic slot) { | |
| 315 if (old == null) { | |
| 316 _root = _createNode(); | |
| 317 assert(_root != null); | |
| 318 var ancestor = findAncestor(RenderNodeWrapper); | |
| 319 if (ancestor is RenderNodeWrapper) | |
| 320 ancestor.insert(this, slot); | |
| 321 old = _emptyNode; | |
| 322 } else { | |
| 323 _root = old._root; | |
| 324 assert(_root != null); | |
| 325 } | |
| 326 | |
| 327 _nodeMap[_root] = this; | |
| 328 _syncRenderNode(old); | |
| 329 } | |
| 330 | |
| 331 void _syncRenderNode(RenderNodeWrapper old) { | |
| 332 RenderNodeWrapper oldRenderNodeWrapper = old as RenderNodeWrapper; | |
| 333 | |
| 334 List<Style> styles = new List<Style>(); | |
| 335 if (style != null) | |
| 336 styles.add(style); | |
| 337 ParentData parentData = null; | |
| 338 UINode parent = _parent; | |
| 339 while (parent != null && parent is! RenderNodeWrapper) { | |
| 340 if (parent is StyleNode && parent.style != null) | |
| 341 styles.add(parent.style); | |
| 342 else | |
| 343 if (parent is ParentDataNode && parent.parentData != null) { | |
| 344 if (parentData != null) | |
| 345 parentData.merge(parent.parentData); // this will throw if the types a
ren't the same | |
| 346 else | |
| 347 parentData = parent.parentData; | |
| 348 } | |
| 349 parent = parent._parent; | |
| 350 } | |
| 351 _root.updateStyles(styles); | |
| 352 if (parentData != null) { | |
| 353 assert(_root.parentData != null); | |
| 354 _root.parentData.merge(parentData); // this will throw if the types aren't
approriate | |
| 355 assert(parent != null); | |
| 356 assert(parent._root != null); | |
| 357 parent._root.markNeedsLayout(); | |
| 358 } | |
| 359 _root.updateInlineStyle(inlineStyle); | |
| 360 } | |
| 361 | |
| 362 void _removeChild(UINode node) { | |
| 363 assert(_root is RenderCSSContainer); | |
| 364 _root.remove(node._root); | |
| 365 super._removeChild(node); | |
| 366 } | |
| 367 | |
| 368 void _remove() { | |
| 369 assert(_root != null); | |
| 370 _nodeMap.remove(_root); | |
| 371 super._remove(); | |
| 372 } | |
| 373 } | |
| 374 | |
| 375 final List<UINode> _emptyList = new List<UINode>(); | |
| 376 | |
| 377 abstract class OneChildListRenderNodeWrapper extends RenderNodeWrapper { | |
| 378 | |
| 379 // In OneChildListRenderNodeWrapper subclasses, slots are RenderCSS nodes | |
| 380 // to use as the "insert before" sibling in RenderCSSContainer.add() calls | |
| 381 | |
| 382 final List<UINode> children; | |
| 383 | |
| 384 OneChildListRenderNodeWrapper({ | |
| 385 Object key, | |
| 386 List<UINode> children, | |
| 387 Style style, | |
| 388 String inlineStyle | |
| 389 }) : this.children = children == null ? _emptyList : children, | |
| 390 super( | |
| 391 key: key, | |
| 392 style: style, | |
| 393 inlineStyle: inlineStyle | |
| 394 ) { | |
| 395 assert(!_debugHasDuplicateIds()); | |
| 396 } | |
| 397 | |
| 398 void insert(RenderNodeWrapper child, dynamic slot) { | |
| 399 assert(slot == null || slot is RenderCSS); | |
| 400 _root.add(child._root, before: slot); | |
| 401 } | |
| 402 | |
| 403 void _remove() { | |
| 404 assert(children != null); | |
| 405 for (var child in children) { | |
| 406 assert(child != null); | |
| 407 _removeChild(child); | |
| 408 } | |
| 409 super._remove(); | |
| 410 } | |
| 411 | |
| 412 bool _debugHasDuplicateIds() { | |
| 413 var idSet = new HashSet<String>(); | |
| 414 for (var child in children) { | |
| 415 assert(child != null); | |
| 416 if (child.interchangeable) | |
| 417 continue; // when these nodes are reordered, we just reassign the data | |
| 418 | |
| 419 if (!idSet.add(child._key)) { | |
| 420 throw '''If multiple non-interchangeable nodes of the same type exist as
children | |
| 421 of another node, they must have unique keys. | |
| 422 Duplicate: "${child._key}"'''; | |
| 423 } | |
| 424 } | |
| 425 return false; | |
| 426 } | |
| 427 | |
| 428 void _syncRenderNode(OneChildListRenderNodeWrapper old) { | |
| 429 super._syncRenderNode(old); | |
| 430 | |
| 431 if (_root is! RenderCSSContainer) | |
| 432 return; | |
| 433 | |
| 434 var startIndex = 0; | |
| 435 var endIndex = children.length; | |
| 436 | |
| 437 var oldChildren = old.children; | |
| 438 var oldStartIndex = 0; | |
| 439 var oldEndIndex = oldChildren.length; | |
| 440 | |
| 441 RenderCSS nextSibling = null; | |
| 442 UINode currentNode = null; | |
| 443 UINode oldNode = null; | |
| 444 | |
| 445 void sync(int atIndex) { | |
| 446 children[atIndex] = _syncChild(currentNode, oldNode, nextSibling); | |
| 447 assert(children[atIndex] != null); | |
| 448 } | |
| 449 | |
| 450 // Scan backwards from end of list while nodes can be directly synced | |
| 451 // without reordering. | |
| 452 while (endIndex > startIndex && oldEndIndex > oldStartIndex) { | |
| 453 currentNode = children[endIndex - 1]; | |
| 454 oldNode = oldChildren[oldEndIndex - 1]; | |
| 455 | |
| 456 if (currentNode._key != oldNode._key) { | |
| 457 break; | |
| 458 } | |
| 459 | |
| 460 endIndex--; | |
| 461 oldEndIndex--; | |
| 462 sync(endIndex); | |
| 463 } | |
| 464 | |
| 465 HashMap<String, UINode> oldNodeIdMap = null; | |
| 466 | |
| 467 bool oldNodeReordered(String key) { | |
| 468 return oldNodeIdMap != null && | |
| 469 oldNodeIdMap.containsKey(key) && | |
| 470 oldNodeIdMap[key] == null; | |
| 471 } | |
| 472 | |
| 473 void advanceOldStartIndex() { | |
| 474 oldStartIndex++; | |
| 475 while (oldStartIndex < oldEndIndex && | |
| 476 oldNodeReordered(oldChildren[oldStartIndex]._key)) { | |
| 477 oldStartIndex++; | |
| 478 } | |
| 479 } | |
| 480 | |
| 481 void ensureOldIdMap() { | |
| 482 if (oldNodeIdMap != null) | |
| 483 return; | |
| 484 | |
| 485 oldNodeIdMap = new HashMap<String, UINode>(); | |
| 486 for (int i = oldStartIndex; i < oldEndIndex; i++) { | |
| 487 var node = oldChildren[i]; | |
| 488 if (!node.interchangeable) | |
| 489 oldNodeIdMap.putIfAbsent(node._key, () => node); | |
| 490 } | |
| 491 } | |
| 492 | |
| 493 bool searchForOldNode() { | |
| 494 if (currentNode.interchangeable) | |
| 495 return false; // never re-order these nodes | |
| 496 | |
| 497 ensureOldIdMap(); | |
| 498 oldNode = oldNodeIdMap[currentNode._key]; | |
| 499 if (oldNode == null) | |
| 500 return false; | |
| 501 | |
| 502 oldNodeIdMap[currentNode._key] = null; // mark it reordered | |
| 503 assert(_root is RenderCSSContainer); | |
| 504 assert(oldNode._root is RenderCSSContainer); | |
| 505 | |
| 506 old._root.remove(oldNode._root); | |
| 507 _root.add(oldNode._root, before: nextSibling); | |
| 508 | |
| 509 return true; | |
| 510 } | |
| 511 | |
| 512 // Scan forwards, this time we may re-order; | |
| 513 nextSibling = _root.firstChild; | |
| 514 while (startIndex < endIndex && oldStartIndex < oldEndIndex) { | |
| 515 currentNode = children[startIndex]; | |
| 516 oldNode = oldChildren[oldStartIndex]; | |
| 517 | |
| 518 if (currentNode._key == oldNode._key) { | |
| 519 assert(currentNode.runtimeType == oldNode.runtimeType); | |
| 520 nextSibling = _root.childAfter(nextSibling); | |
| 521 sync(startIndex); | |
| 522 startIndex++; | |
| 523 advanceOldStartIndex(); | |
| 524 continue; | |
| 525 } | |
| 526 | |
| 527 oldNode = null; | |
| 528 searchForOldNode(); | |
| 529 sync(startIndex); | |
| 530 startIndex++; | |
| 531 } | |
| 532 | |
| 533 // New insertions | |
| 534 oldNode = null; | |
| 535 while (startIndex < endIndex) { | |
| 536 currentNode = children[startIndex]; | |
| 537 sync(startIndex); | |
| 538 startIndex++; | |
| 539 } | |
| 540 | |
| 541 // Removals | |
| 542 currentNode = null; | |
| 543 while (oldStartIndex < oldEndIndex) { | |
| 544 oldNode = oldChildren[oldStartIndex]; | |
| 545 _removeChild(oldNode); | |
| 546 advanceOldStartIndex(); | |
| 547 } | |
| 548 } | |
| 549 } | |
| 550 | |
| 551 class Container extends OneChildListRenderNodeWrapper { | |
| 552 | |
| 553 RenderCSSContainer _root; | |
| 554 RenderCSSContainer _createNode() => new RenderCSSContainer(this); | |
| 555 | |
| 556 static final Container _emptyContainer = new Container(); | |
| 557 | |
| 558 RenderNodeWrapper get _emptyNode => _emptyContainer; | |
| 559 | |
| 560 Container({ | |
| 561 Object key, | |
| 562 List<UINode> children, | |
| 563 Style style, | |
| 564 String inlineStyle | |
| 565 }) : super( | |
| 566 key: key, | |
| 567 children: children, | |
| 568 style: style, | |
| 569 inlineStyle: inlineStyle | |
| 570 ); | |
| 571 } | |
| 572 | |
| 573 class Paragraph extends OneChildListRenderNodeWrapper { | |
| 574 | |
| 575 RenderCSSParagraph _root; | |
| 576 RenderCSSParagraph _createNode() => new RenderCSSParagraph(this); | |
| 577 | |
| 578 static final Paragraph _emptyContainer = new Paragraph(); | |
| 579 | |
| 580 RenderNodeWrapper get _emptyNode => _emptyContainer; | |
| 581 | |
| 582 Paragraph({ | |
| 583 Object key, | |
| 584 List<UINode> children, | |
| 585 Style style, | |
| 586 String inlineStyle | |
| 587 }) : super( | |
| 588 key: key, | |
| 589 children: children, | |
| 590 style: style, | |
| 591 inlineStyle: inlineStyle | |
| 592 ); | |
| 593 } | |
| 594 | |
| 595 class FlexContainer extends OneChildListRenderNodeWrapper { | |
| 596 | |
| 597 RenderCSSFlex _root; | |
| 598 RenderCSSFlex _createNode() => new RenderCSSFlex(this, this.direction); | |
| 599 | |
| 600 static final FlexContainer _emptyContainer = new FlexContainer(); | |
| 601 // direction doesn't matter if it's empty | |
| 602 | |
| 603 RenderNodeWrapper get _emptyNode => _emptyContainer; | |
| 604 | |
| 605 final FlexDirection direction; | |
| 606 | |
| 607 FlexContainer({ | |
| 608 Object key, | |
| 609 List<UINode> children, | |
| 610 Style style, | |
| 611 String inlineStyle, | |
| 612 this.direction: FlexDirection.Row | |
| 613 }) : super( | |
| 614 key: key, | |
| 615 children: children, | |
| 616 style: style, | |
| 617 inlineStyle: inlineStyle | |
| 618 ); | |
| 619 | |
| 620 void _syncRenderNode(UINode old) { | |
| 621 super._syncRenderNode(old); | |
| 622 _root.direction = direction; | |
| 623 } | |
| 624 } | |
| 625 | |
| 626 class FillStackContainer extends OneChildListRenderNodeWrapper { | |
| 627 | |
| 628 RenderCSSStack _root; | |
| 629 RenderCSSStack _createNode() => new RenderCSSStack(this); | |
| 630 | |
| 631 static final FillStackContainer _emptyContainer = new FillStackContainer(); | |
| 632 | |
| 633 RenderNodeWrapper get _emptyNode => _emptyContainer; | |
| 634 | |
| 635 FillStackContainer({ | |
| 636 Object key, | |
| 637 List<UINode> children, | |
| 638 Style style, | |
| 639 String inlineStyle | |
| 640 }) : super( | |
| 641 key: key, | |
| 642 children: _positionNodesToFill(children), | |
| 643 style: style, | |
| 644 inlineStyle: inlineStyle | |
| 645 ); | |
| 646 | |
| 647 static StackParentData _fillParentData = new StackParentData() | |
| 648 ..top = 0.0 | |
| 649 ..left = 0.0 | |
| 650 ..right = 0.0 | |
| 651 ..bottom = 0.0; | |
| 652 | |
| 653 static List<UINode> _positionNodesToFill(List<UINode> input) { | |
| 654 if (input == null) | |
| 655 return null; | |
| 656 return input.map((node) { | |
| 657 return new ParentDataNode(node, _fillParentData); | |
| 658 }).toList(); | |
| 659 } | |
| 660 } | |
| 661 | |
| 662 class TextFragment extends RenderNodeWrapper { | |
| 663 | |
| 664 RenderCSSInline _root; | |
| 665 RenderCSSInline _createNode() => new RenderCSSInline(this, this.data); | |
| 666 | |
| 667 static final TextFragment _emptyText = new TextFragment(''); | |
| 668 | |
| 669 RenderNodeWrapper get _emptyNode => _emptyText; | |
| 670 | |
| 671 final String data; | |
| 672 | |
| 673 TextFragment(this.data, { | |
| 674 Object key, | |
| 675 Style style, | |
| 676 String inlineStyle | |
| 677 }) : super( | |
| 678 key: key, | |
| 679 style: style, | |
| 680 inlineStyle: inlineStyle | |
| 681 ); | |
| 682 | |
| 683 void _syncRenderNode(UINode old) { | |
| 684 super._syncRenderNode(old); | |
| 685 _root.data = data; | |
| 686 } | |
| 687 } | |
| 688 | |
| 689 class Image extends RenderNodeWrapper { | |
| 690 | |
| 691 RenderCSSImage _root; | |
| 692 RenderCSSImage _createNode() => new RenderCSSImage(this, this.src, this.width,
this.height); | |
| 693 | |
| 694 static final Image _emptyImage = new Image(); | |
| 695 | |
| 696 RenderNodeWrapper get _emptyNode => _emptyImage; | |
| 697 | |
| 698 final String src; | |
| 699 final int width; | |
| 700 final int height; | |
| 701 | |
| 702 Image({ | |
| 703 Object key, | |
| 704 Style style, | |
| 705 String inlineStyle, | |
| 706 this.width, | |
| 707 this.height, | |
| 708 this.src | |
| 709 }) : super( | |
| 710 key: key, | |
| 711 style: style, | |
| 712 inlineStyle: inlineStyle | |
| 713 ); | |
| 714 | |
| 715 void _syncRenderNode(UINode old) { | |
| 716 super._syncRenderNode(old); | |
| 717 _root.configure(this.src, this.width, this.height); | |
| 718 } | |
| 719 } | |
| 720 | |
| 721 | |
| 722 Set<Component> _mountedComponents = new HashSet<Component>(); | |
| 723 Set<Component> _unmountedComponents = new HashSet<Component>(); | |
| 724 | |
| 725 void _enqueueDidMount(Component c) { | |
| 726 assert(!_notifingMountStatus); | |
| 727 _mountedComponents.add(c); | |
| 728 } | |
| 729 | |
| 730 void _enqueueDidUnmount(Component c) { | |
| 731 assert(!_notifingMountStatus); | |
| 732 _unmountedComponents.add(c); | |
| 733 } | |
| 734 | |
| 735 bool _notifingMountStatus = false; | |
| 736 | |
| 737 void _notifyMountStatusChanged() { | |
| 738 try { | |
| 739 _notifingMountStatus = true; | |
| 740 _unmountedComponents.forEach((c) => c._didUnmount()); | |
| 741 _mountedComponents.forEach((c) => c._didMount()); | |
| 742 _mountedComponents.clear(); | |
| 743 _unmountedComponents.clear(); | |
| 744 } finally { | |
| 745 _notifingMountStatus = false; | |
| 746 } | |
| 747 } | |
| 748 | |
| 749 List<Component> _dirtyComponents = new List<Component>(); | |
| 750 bool _buildScheduled = false; | |
| 751 bool _inRenderDirtyComponents = false; | |
| 752 | |
| 753 void _buildDirtyComponents() { | |
| 754 _tracing.begin('fn::_buildDirtyComponents'); | |
| 755 | |
| 756 Stopwatch sw; | |
| 757 if (_shouldLogRenderDuration) | |
| 758 sw = new Stopwatch()..start(); | |
| 759 | |
| 760 try { | |
| 761 _inRenderDirtyComponents = true; | |
| 762 | |
| 763 _dirtyComponents.sort((a, b) => a._order - b._order); | |
| 764 for (var comp in _dirtyComponents) { | |
| 765 comp._buildIfDirty(); | |
| 766 } | |
| 767 | |
| 768 _dirtyComponents.clear(); | |
| 769 _buildScheduled = false; | |
| 770 } finally { | |
| 771 _inRenderDirtyComponents = false; | |
| 772 } | |
| 773 | |
| 774 _notifyMountStatusChanged(); | |
| 775 | |
| 776 if (_shouldLogRenderDuration) { | |
| 777 sw.stop(); | |
| 778 print('Render took ${sw.elapsedMicroseconds} microseconds'); | |
| 779 } | |
| 780 | |
| 781 _tracing.end('fn::_buildDirtyComponents'); | |
| 782 } | |
| 783 | |
| 784 void _scheduleComponentForRender(Component c) { | |
| 785 assert(!_inRenderDirtyComponents); | |
| 786 _dirtyComponents.add(c); | |
| 787 | |
| 788 if (!_buildScheduled) { | |
| 789 _buildScheduled = true; | |
| 790 new Future.microtask(_buildDirtyComponents); | |
| 791 } | |
| 792 } | |
| 793 | |
| 794 abstract class Component extends UINode { | |
| 795 bool get _isBuilding => _currentlyBuilding == this; | |
| 796 bool _dirty = true; | |
| 797 | |
| 798 UINode _built; | |
| 799 final int _order; | |
| 800 static int _currentOrder = 0; | |
| 801 bool _stateful; | |
| 802 static Component _currentlyBuilding; | |
| 803 List<Function> _mountCallbacks; | |
| 804 List<Function> _unmountCallbacks; | |
| 805 dynamic _slot; // cached slot from the last time we were synced | |
| 806 | |
| 807 void onDidMount(Function fn) { | |
| 808 if (_mountCallbacks == null) | |
| 809 _mountCallbacks = new List<Function>(); | |
| 810 | |
| 811 _mountCallbacks.add(fn); | |
| 812 } | |
| 813 | |
| 814 void onDidUnmount(Function fn) { | |
| 815 if (_unmountCallbacks == null) | |
| 816 _unmountCallbacks = new List<Function>(); | |
| 817 | |
| 818 _unmountCallbacks.add(fn); | |
| 819 } | |
| 820 | |
| 821 | |
| 822 Component({ Object key, bool stateful }) | |
| 823 : _stateful = stateful != null ? stateful : false, | |
| 824 _order = _currentOrder + 1, | |
| 825 super(key: key); | |
| 826 | |
| 827 Component.fromArgs(Object key, bool stateful) | |
| 828 : this(key: key, stateful: stateful); | |
| 829 | |
| 830 void _didMount() { | |
| 831 if (_mountCallbacks != null) | |
| 832 _mountCallbacks.forEach((fn) => fn()); | |
| 833 } | |
| 834 | |
| 835 void _didUnmount() { | |
| 836 if (_unmountCallbacks != null) | |
| 837 _unmountCallbacks.forEach((fn) => fn()); | |
| 838 } | |
| 839 | |
| 840 // TODO(rafaelw): It seems wrong to expose DOM at all. This is presently | |
| 841 // needed to get sizing info. | |
| 842 RenderCSS getRoot() => _root; | |
| 843 | |
| 844 void _remove() { | |
| 845 assert(_built != null); | |
| 846 assert(_root != null); | |
| 847 _removeChild(_built); | |
| 848 _built = null; | |
| 849 _enqueueDidUnmount(this); | |
| 850 super._remove(); | |
| 851 } | |
| 852 | |
| 853 bool _willSync(UINode old) { | |
| 854 Component oldComponent = old as Component; | |
| 855 if (oldComponent == null || !oldComponent._stateful) | |
| 856 return false; | |
| 857 | |
| 858 // Make |this| the "old" Component | |
| 859 _stateful = false; | |
| 860 _built = oldComponent._built; | |
| 861 assert(_built != null); | |
| 862 | |
| 863 // Make |oldComponent| the "new" component | |
| 864 reflect.copyPublicFields(this, oldComponent); | |
| 865 oldComponent._built = null; | |
| 866 oldComponent._dirty = true; | |
| 867 return true; | |
| 868 } | |
| 869 | |
| 870 /* There are three cases here: | |
| 871 * 1) Building for the first time: | |
| 872 * assert(_built == null && old == null) | |
| 873 * 2) Re-building (because a dirty flag got set): | |
| 874 * assert(_built != null && old == null) | |
| 875 * 3) Syncing against an old version | |
| 876 * assert(_built == null && old != null) | |
| 877 */ | |
| 878 void _sync(UINode old, dynamic slot) { | |
| 879 assert(!_defunct); | |
| 880 assert(_built == null || old == null); | |
| 881 | |
| 882 Component oldComponent = old as Component; | |
| 883 | |
| 884 _slot = slot; | |
| 885 | |
| 886 var oldBuilt; | |
| 887 if (oldComponent == null) { | |
| 888 oldBuilt = _built; | |
| 889 } else { | |
| 890 assert(_built == null); | |
| 891 oldBuilt = oldComponent._built; | |
| 892 } | |
| 893 | |
| 894 if (oldBuilt == null) | |
| 895 _enqueueDidMount(this); | |
| 896 | |
| 897 int lastOrder = _currentOrder; | |
| 898 _currentOrder = _order; | |
| 899 _currentlyBuilding = this; | |
| 900 _built = build(); | |
| 901 _currentlyBuilding = null; | |
| 902 _currentOrder = lastOrder; | |
| 903 | |
| 904 _built = _syncChild(_built, oldBuilt, slot); | |
| 905 _dirty = false; | |
| 906 _root = _built._root; | |
| 907 assert(_root != null); | |
| 908 } | |
| 909 | |
| 910 void _buildIfDirty() { | |
| 911 if (!_dirty || _defunct) | |
| 912 return; | |
| 913 | |
| 914 _trace('$_key rebuilding...'); | |
| 915 assert(_root != null); | |
| 916 _sync(null, _slot); | |
| 917 } | |
| 918 | |
| 919 void scheduleBuild() { | |
| 920 setState(() {}); | |
| 921 } | |
| 922 | |
| 923 void setState(Function fn()) { | |
| 924 _stateful = true; | |
| 925 fn(); | |
| 926 if (_isBuilding || _dirty || _defunct) | |
| 927 return; | |
| 928 | |
| 929 _dirty = true; | |
| 930 _scheduleComponentForRender(this); | |
| 931 } | |
| 932 | |
| 933 UINode build(); | |
| 934 } | |
| 935 | |
| 936 abstract class App extends Component { | |
| 937 RenderCSS _host; | |
| 938 | |
| 939 App() : super(stateful: true) { | |
| 940 _host = new RenderCSSRoot(this); | |
| 941 _scheduleComponentForRender(this); | |
| 942 } | |
| 943 | |
| 944 void _buildIfDirty() { | |
| 945 if (!_dirty || _defunct) | |
| 946 return; | |
| 947 | |
| 948 _trace('$_key rebuilding...'); | |
| 949 _sync(null, null); | |
| 950 if (_root.parent == null) | |
| 951 _host.add(_root); | |
| 952 assert(_root.parent == _host); | |
| 953 } | |
| 954 } | |
| 955 | |
| 956 class Text extends Component { | |
| 957 Text(this.data) : super(key: '*text*'); | |
| 958 final String data; | |
| 959 bool get interchangeable => true; | |
| 960 UINode build() => new Paragraph(children: [new TextFragment(data)]); | |
| 961 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1221883002:
Remove package:sky/framework (Closed)
Base URL: git@github.com:domokit/mojo.git@master