summaryrefslogtreecommitdiffstats
path: root/dom/base/nsNodeUtils.cpp
blob: c38f08a3d825befcc833c6ff7c9039d0d7ceaeec (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsNodeUtils.h"
#include "nsContentUtils.h"
#include "nsCSSPseudoElements.h"
#include "nsINode.h"
#include "nsIContent.h"
#include "mozilla/dom/Element.h"
#include "nsIMutationObserver.h"
#include "nsIDocument.h"
#include "mozilla/EventListenerManager.h"
#include "nsIXPConnect.h"
#include "PLDHashTable.h"
#include "nsIDOMAttr.h"
#include "nsCOMArray.h"
#include "nsPIDOMWindow.h"
#include "nsDocument.h"
#ifdef MOZ_XUL
#include "nsXULElement.h"
#endif
#include "nsBindingManager.h"
#include "nsGenericHTMLElement.h"
#include "mozilla/AnimationTarget.h"
#include "mozilla/Assertions.h"
#include "mozilla/dom/Animation.h"
#include "mozilla/dom/HTMLImageElement.h"
#include "mozilla/dom/HTMLMediaElement.h"
#include "mozilla/dom/KeyframeEffectReadOnly.h"
#include "nsWrapperCacheInlines.h"
#include "nsObjectLoadingContent.h"
#include "nsDOMMutationObserver.h"
#include "mozilla/dom/BindingUtils.h"
#include "mozilla/dom/HTMLTemplateElement.h"
#include "mozilla/dom/ShadowRoot.h"

using namespace mozilla;
using namespace mozilla::dom;
using mozilla::AutoJSContext;

// This macro expects the ownerDocument of content_ to be in scope as
// |nsIDocument* doc|
#define IMPL_MUTATION_NOTIFICATION(func_, content_, params_)      \
  PR_BEGIN_MACRO                                                  \
  bool needsEnterLeave = doc->MayHaveDOMMutationObservers();      \
  if (needsEnterLeave) {                                          \
    nsDOMMutationObserver::EnterMutationHandling();               \
  }                                                               \
  nsINode* node = content_;                                       \
  NS_ASSERTION(node->OwnerDoc() == doc, "Bogus document");        \
  if (doc) {                                                      \
    doc->BindingManager()->func_ params_;                         \
  }                                                               \
  do {                                                            \
    nsINode::nsSlots* slots = node->GetExistingSlots();           \
    if (slots && !slots->mMutationObservers.IsEmpty()) {          \
      /* No need to explicitly notify the first observer first    \
         since that'll happen anyway. */                          \
      NS_OBSERVER_ARRAY_NOTIFY_OBSERVERS(                         \
        slots->mMutationObservers, nsIMutationObserver,           \
        func_, params_);                                          \
    }                                                             \
    ShadowRoot* shadow = ShadowRoot::FromNode(node);              \
    if (shadow) {                                                 \
      node = shadow->GetPoolHost();                               \
    } else {                                                      \
      node = node->GetParentNode();                               \
    }                                                             \
  } while (node);                                                 \
  if (needsEnterLeave) {                                          \
    nsDOMMutationObserver::LeaveMutationHandling();               \
  }                                                               \
  PR_END_MACRO

#define IMPL_ANIMATION_NOTIFICATION(func_, content_, params_)     \
  PR_BEGIN_MACRO                                                  \
  bool needsEnterLeave = doc->MayHaveDOMMutationObservers();      \
  if (needsEnterLeave) {                                          \
    nsDOMMutationObserver::EnterMutationHandling();               \
  }                                                               \
  nsINode* node = content_;                                       \
  do {                                                            \
    nsINode::nsSlots* slots = node->GetExistingSlots();           \
    if (slots && !slots->mMutationObservers.IsEmpty()) {          \
      /* No need to explicitly notify the first observer first    \
         since that'll happen anyway. */                          \
      NS_OBSERVER_ARRAY_NOTIFY_OBSERVERS_WITH_QI(                 \
        slots->mMutationObservers, nsIMutationObserver,           \
        nsIAnimationObserver, func_, params_);                    \
    }                                                             \
    ShadowRoot* shadow = ShadowRoot::FromNode(node);              \
    if (shadow) {                                                 \
      node = shadow->GetPoolHost();                               \
    } else {                                                      \
      node = node->GetParentNode();                               \
    }                                                             \
  } while (node);                                                 \
  if (needsEnterLeave) {                                          \
    nsDOMMutationObserver::LeaveMutationHandling();               \
  }                                                               \
  PR_END_MACRO

void
nsNodeUtils::CharacterDataWillChange(nsIContent* aContent,
                                     CharacterDataChangeInfo* aInfo)
{
  nsIDocument* doc = aContent->OwnerDoc();
  IMPL_MUTATION_NOTIFICATION(CharacterDataWillChange, aContent,
                             (doc, aContent, aInfo));
}

void
nsNodeUtils::CharacterDataChanged(nsIContent* aContent,
                                  CharacterDataChangeInfo* aInfo)
{
  nsIDocument* doc = aContent->OwnerDoc();
  IMPL_MUTATION_NOTIFICATION(CharacterDataChanged, aContent,
                             (doc, aContent, aInfo));
}

void
nsNodeUtils::AttributeWillChange(Element* aElement,
                                 int32_t aNameSpaceID,
                                 nsIAtom* aAttribute,
                                 int32_t aModType,
                                 const nsAttrValue* aNewValue)
{
  nsIDocument* doc = aElement->OwnerDoc();
  IMPL_MUTATION_NOTIFICATION(AttributeWillChange, aElement,
                             (doc, aElement, aNameSpaceID, aAttribute,
                              aModType, aNewValue));
}

void
nsNodeUtils::AttributeChanged(Element* aElement,
                              int32_t aNameSpaceID,
                              nsIAtom* aAttribute,
                              int32_t aModType,
                              const nsAttrValue* aOldValue)
{
  nsIDocument* doc = aElement->OwnerDoc();
  IMPL_MUTATION_NOTIFICATION(AttributeChanged, aElement,
                             (doc, aElement, aNameSpaceID, aAttribute,
                              aModType, aOldValue));
}

void
nsNodeUtils::AttributeSetToCurrentValue(Element* aElement,
                                        int32_t aNameSpaceID,
                                        nsIAtom* aAttribute)
{
  nsIDocument* doc = aElement->OwnerDoc();
  IMPL_MUTATION_NOTIFICATION(AttributeSetToCurrentValue, aElement,
                             (doc, aElement, aNameSpaceID, aAttribute));
}

void
nsNodeUtils::ContentAppended(nsIContent* aContainer,
                             nsIContent* aFirstNewContent,
                             int32_t aNewIndexInContainer)
{
  nsIDocument* doc = aContainer->OwnerDoc();

  IMPL_MUTATION_NOTIFICATION(ContentAppended, aContainer,
                             (doc, aContainer, aFirstNewContent,
                              aNewIndexInContainer));
}

void
nsNodeUtils::NativeAnonymousChildListChange(nsIContent* aContent,
                                            bool aIsRemove)
{
  nsIDocument* doc = aContent->OwnerDoc();
  IMPL_MUTATION_NOTIFICATION(NativeAnonymousChildListChange, aContent,
                            (doc, aContent, aIsRemove));
}

void
nsNodeUtils::ContentInserted(nsINode* aContainer,
                             nsIContent* aChild,
                             int32_t aIndexInContainer)
{
  NS_PRECONDITION(aContainer->IsNodeOfType(nsINode::eCONTENT) ||
                  aContainer->IsNodeOfType(nsINode::eDOCUMENT),
                  "container must be an nsIContent or an nsIDocument");
  nsIContent* container;
  nsIDocument* doc = aContainer->OwnerDoc();
  nsIDocument* document;
  if (aContainer->IsNodeOfType(nsINode::eCONTENT)) {
    container = static_cast<nsIContent*>(aContainer);
    document = doc;
  }
  else {
    container = nullptr;
    document = static_cast<nsIDocument*>(aContainer);
  }

  IMPL_MUTATION_NOTIFICATION(ContentInserted, aContainer,
                             (document, container, aChild, aIndexInContainer));
}

void
nsNodeUtils::ContentRemoved(nsINode* aContainer,
                            nsIContent* aChild,
                            int32_t aIndexInContainer,
                            nsIContent* aPreviousSibling)
{
  NS_PRECONDITION(aContainer->IsNodeOfType(nsINode::eCONTENT) ||
                  aContainer->IsNodeOfType(nsINode::eDOCUMENT),
                  "container must be an nsIContent or an nsIDocument");
  nsIContent* container;
  nsIDocument* doc = aContainer->OwnerDoc();
  nsIDocument* document;
  if (aContainer->IsNodeOfType(nsINode::eCONTENT)) {
    container = static_cast<nsIContent*>(aContainer);
    document = doc;
  }
  else {
    container = nullptr;
    document = static_cast<nsIDocument*>(aContainer);
  }

  IMPL_MUTATION_NOTIFICATION(ContentRemoved, aContainer,
                             (document, container, aChild, aIndexInContainer,
                              aPreviousSibling));
}

Maybe<NonOwningAnimationTarget>
nsNodeUtils::GetTargetForAnimation(const Animation* aAnimation)
{
  AnimationEffectReadOnly* effect = aAnimation->GetEffect();
  if (!effect || !effect->AsKeyframeEffect()) {
    return Nothing();
  }
  return effect->AsKeyframeEffect()->GetTarget();
}

void
nsNodeUtils::AnimationMutated(Animation* aAnimation,
                              AnimationMutationType aMutatedType)
{
  Maybe<NonOwningAnimationTarget> target = GetTargetForAnimation(aAnimation);
  if (!target) {
    return;
  }

  // A pseudo element and its parent element use the same owner doc.
  nsIDocument* doc = target->mElement->OwnerDoc();
  if (doc->MayHaveAnimationObservers()) {
    // we use the its parent element as the subject in DOM Mutation Observer.
    Element* elem = target->mElement;
    switch (aMutatedType) {
      case AnimationMutationType::Added:
        IMPL_ANIMATION_NOTIFICATION(AnimationAdded, elem, (aAnimation));
        break;
      case AnimationMutationType::Changed:
        IMPL_ANIMATION_NOTIFICATION(AnimationChanged, elem, (aAnimation));
        break;
      case AnimationMutationType::Removed:
        IMPL_ANIMATION_NOTIFICATION(AnimationRemoved, elem, (aAnimation));
        break;
      default:
        MOZ_ASSERT_UNREACHABLE("unexpected mutation type");
    }
  }
}

void
nsNodeUtils::AnimationAdded(Animation* aAnimation)
{
  AnimationMutated(aAnimation, AnimationMutationType::Added);
}

void
nsNodeUtils::AnimationChanged(Animation* aAnimation)
{
  AnimationMutated(aAnimation, AnimationMutationType::Changed);
}

void
nsNodeUtils::AnimationRemoved(Animation* aAnimation)
{
  AnimationMutated(aAnimation, AnimationMutationType::Removed);
}

void
nsNodeUtils::LastRelease(nsINode* aNode)
{
  nsINode::nsSlots* slots = aNode->GetExistingSlots();
  if (slots) {
    if (!slots->mMutationObservers.IsEmpty()) {
      NS_OBSERVER_ARRAY_NOTIFY_OBSERVERS(slots->mMutationObservers,
                                         nsIMutationObserver,
                                         NodeWillBeDestroyed, (aNode));
    }

    if (aNode->IsElement()) {
      Element* elem = aNode->AsElement();
      FragmentOrElement::nsDOMSlots* domSlots =
        static_cast<FragmentOrElement::nsDOMSlots*>(slots);
      if (domSlots->mExtendedSlots) {
        for (auto iter = domSlots->mExtendedSlots->mRegisteredIntersectionObservers.Iter();
             !iter.Done(); iter.Next()) {
          DOMIntersectionObserver* observer = iter.Key();
          observer->UnlinkTarget(*elem);
        }
      }
    }

    delete slots;
    aNode->mSlots = nullptr;
  }

  // Kill properties first since that may run external code, so we want to
  // be in as complete state as possible at that time.
  if (aNode->IsNodeOfType(nsINode::eDOCUMENT)) {
    // Delete all properties before tearing down the document. Some of the
    // properties are bound to nsINode objects and the destructor functions of
    // the properties may want to use the owner document of the nsINode.
    static_cast<nsIDocument*>(aNode)->DeleteAllProperties();
  }
  else {
    if (aNode->HasProperties()) {
      // Strong reference to the document so that deleting properties can't
      // delete the document.
      nsCOMPtr<nsIDocument> document = aNode->OwnerDoc();
      document->DeleteAllPropertiesFor(aNode);
    }

    // I wonder whether it's faster to do the HasFlag check first....
    if (aNode->IsNodeOfType(nsINode::eHTML_FORM_CONTROL) &&
        aNode->HasFlag(ADDED_TO_FORM)) {
      // Tell the form (if any) this node is going away.  Don't
      // notify, since we're being destroyed in any case.
      static_cast<nsGenericHTMLFormElement*>(aNode)->ClearForm(true);
    }

    if (aNode->IsHTMLElement(nsGkAtoms::img) &&
        aNode->HasFlag(ADDED_TO_FORM)) {
      HTMLImageElement* imageElem = static_cast<HTMLImageElement*>(aNode);
      imageElem->ClearForm(true);
    }
  }
  aNode->UnsetFlags(NODE_HAS_PROPERTIES);

  if (aNode->NodeType() != nsIDOMNode::DOCUMENT_NODE &&
      aNode->HasFlag(NODE_HAS_LISTENERMANAGER)) {
#ifdef DEBUG
    if (nsContentUtils::IsInitialized()) {
      EventListenerManager* manager =
        nsContentUtils::GetExistingListenerManagerForNode(aNode);
      if (!manager) {
        NS_ERROR("Huh, our bit says we have a listener manager list, "
                 "but there's nothing in the hash!?!!");
      }
    }
#endif

    nsContentUtils::RemoveListenerManager(aNode);
    aNode->UnsetFlags(NODE_HAS_LISTENERMANAGER);
  }

  if (aNode->IsElement()) {
    nsIDocument* ownerDoc = aNode->OwnerDoc();
    Element* elem = aNode->AsElement();
    ownerDoc->ClearBoxObjectFor(elem);

    NS_ASSERTION(aNode->HasFlag(NODE_FORCE_XBL_BINDINGS) ||
                 !elem->GetXBLBinding(),
                 "Non-forced node has binding on destruction");

    // if NODE_FORCE_XBL_BINDINGS is set, the node might still have a binding
    // attached
    if (aNode->HasFlag(NODE_FORCE_XBL_BINDINGS) &&
        ownerDoc->BindingManager()) {
      ownerDoc->BindingManager()->RemovedFromDocument(elem, ownerDoc,
                                                      nsBindingManager::eRunDtor);
    }
  }

  aNode->ReleaseWrapper(aNode);

  FragmentOrElement::RemoveBlackMarkedNode(aNode);
}

static void
NoteUserData(void *aObject, nsIAtom *aKey, void *aXPCOMChild, void *aData)
{
  nsCycleCollectionTraversalCallback* cb =
    static_cast<nsCycleCollectionTraversalCallback*>(aData);
  NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(*cb, "[user data]");
  cb->NoteXPCOMChild(static_cast<nsISupports*>(aXPCOMChild));
}

/* static */
void
nsNodeUtils::TraverseUserData(nsINode* aNode,
                              nsCycleCollectionTraversalCallback &aCb)
{
  nsIDocument* ownerDoc = aNode->OwnerDoc();
  ownerDoc->PropertyTable(DOM_USER_DATA)->Enumerate(aNode, NoteUserData, &aCb);
}

/* static */
nsresult
nsNodeUtils::CloneNodeImpl(nsINode *aNode, bool aDeep, nsINode **aResult)
{
  *aResult = nullptr;

  nsCOMPtr<nsINode> newNode;
  nsCOMArray<nsINode> nodesWithProperties;
  nsresult rv = Clone(aNode, aDeep, nullptr, nodesWithProperties,
                      getter_AddRefs(newNode));
  NS_ENSURE_SUCCESS(rv, rv);

  newNode.forget(aResult);
  return NS_OK;
}

/* static */
nsresult
nsNodeUtils::CloneAndAdopt(nsINode *aNode, bool aClone, bool aDeep,
                           nsNodeInfoManager *aNewNodeInfoManager,
                           JS::Handle<JSObject*> aReparentScope,
                           nsCOMArray<nsINode> &aNodesWithProperties,
                           nsINode *aParent, nsINode **aResult)
{
  NS_PRECONDITION((!aClone && aNewNodeInfoManager) || !aReparentScope,
                  "If cloning or not getting a new nodeinfo we shouldn't "
                  "rewrap");
  NS_PRECONDITION(!aParent || aNode->IsNodeOfType(nsINode::eCONTENT),
                  "Can't insert document or attribute nodes into a parent");

  *aResult = nullptr;

  // First deal with aNode and walk its attributes (and their children). Then,
  // if aDeep is true, deal with aNode's children (and recurse into their
  // attributes and children).

  nsAutoScriptBlocker scriptBlocker;
  nsresult rv;

  nsNodeInfoManager *nodeInfoManager = aNewNodeInfoManager;

  // aNode.
  NodeInfo *nodeInfo = aNode->mNodeInfo;
  RefPtr<NodeInfo> newNodeInfo;
  if (nodeInfoManager) {

    // Don't allow importing/adopting nodes from non-privileged "scriptable"
    // documents to "non-scriptable" documents.
    nsIDocument* newDoc = nodeInfoManager->GetDocument();
    NS_ENSURE_STATE(newDoc);
    bool hasHadScriptHandlingObject = false;
    if (!newDoc->GetScriptHandlingObject(hasHadScriptHandlingObject) &&
        !hasHadScriptHandlingObject) {
      nsIDocument* currentDoc = aNode->OwnerDoc();
      NS_ENSURE_STATE((nsContentUtils::IsChromeDoc(currentDoc) ||
                       (!currentDoc->GetScriptHandlingObject(hasHadScriptHandlingObject) &&
                        !hasHadScriptHandlingObject)));
    }

    newNodeInfo = nodeInfoManager->GetNodeInfo(nodeInfo->NameAtom(),
                                               nodeInfo->GetPrefixAtom(),
                                               nodeInfo->NamespaceID(),
                                               nodeInfo->NodeType(),
                                               nodeInfo->GetExtraName());

    nodeInfo = newNodeInfo;
  }

  Element *elem = aNode->IsElement() ? aNode->AsElement() : nullptr;

  nsCOMPtr<nsINode> clone;
  if (aClone) {
    rv = aNode->Clone(nodeInfo, getter_AddRefs(clone));
    NS_ENSURE_SUCCESS(rv, rv);

    if (clone->IsElement()) {
      // The cloned node may be a custom element that may require
      // enqueing created callback and prototype swizzling.
      Element* elem = clone->AsElement();
      if (nsContentUtils::IsCustomElementName(nodeInfo->NameAtom())) {
        nsContentUtils::SetupCustomElement(elem);
      } else {
        // Check if node may be custom element by type extension.
        // ex. <button is="x-button">
        nsAutoString extension;
        if (elem->GetAttr(kNameSpaceID_None, nsGkAtoms::is, extension) &&
            !extension.IsEmpty()) {
          nsContentUtils::SetupCustomElement(elem, &extension);
        }
      }
    }

    if (aParent) {
      // If we're cloning we need to insert the cloned children into the cloned
      // parent.
      rv = aParent->AppendChildTo(static_cast<nsIContent*>(clone.get()),
                                  false);
      NS_ENSURE_SUCCESS(rv, rv);
    }
    else if (aDeep && clone->IsNodeOfType(nsINode::eDOCUMENT)) {
      // After cloning the document itself, we want to clone the children into
      // the cloned document (somewhat like cloning and importing them into the
      // cloned document).
      nodeInfoManager = clone->mNodeInfo->NodeInfoManager();
    }
  }
  else if (nodeInfoManager) {
    nsIDocument* oldDoc = aNode->OwnerDoc();
    bool wasRegistered = false;
    if (aNode->IsElement()) {
      Element* element = aNode->AsElement();
      oldDoc->ClearBoxObjectFor(element);
      wasRegistered = oldDoc->UnregisterActivityObserver(element);
    }

    aNode->mNodeInfo.swap(newNodeInfo);
    if (elem) {
      elem->NodeInfoChanged();
    }

    nsIDocument* newDoc = aNode->OwnerDoc();
    if (newDoc) {
      // XXX what if oldDoc is null, we don't know if this should be
      // registered or not! Can that really happen?
      if (wasRegistered) {
        newDoc->RegisterActivityObserver(aNode->AsElement());
      }

      if (nsPIDOMWindowInner* window = newDoc->GetInnerWindow()) {
        EventListenerManager* elm = aNode->GetExistingListenerManager();
        if (elm) {
          window->SetMutationListeners(elm->MutationListenerBits());
          if (elm->MayHavePaintEventListener()) {
            window->SetHasPaintEventListeners();
          }
          if (elm->MayHaveTouchEventListener()) {
            window->SetHasTouchEventListeners();
          }
          if (elm->MayHaveMouseEnterLeaveEventListener()) {
            window->SetHasMouseEnterLeaveEventListeners();
          }
          if (elm->MayHavePointerEnterLeaveEventListener()) {
            window->SetHasPointerEnterLeaveEventListeners();
          }
        }
      }
    }

    if (wasRegistered && oldDoc != newDoc) {
      nsCOMPtr<nsIDOMHTMLMediaElement> domMediaElem(do_QueryInterface(aNode));
      if (domMediaElem) {
        HTMLMediaElement* mediaElem = static_cast<HTMLMediaElement*>(aNode);
        mediaElem->NotifyOwnerDocumentActivityChanged();
      }
      nsCOMPtr<nsIObjectLoadingContent> objectLoadingContent(do_QueryInterface(aNode));
      if (objectLoadingContent) {
        nsObjectLoadingContent* olc = static_cast<nsObjectLoadingContent*>(objectLoadingContent.get());
        olc->NotifyOwnerDocumentActivityChanged();
      }
    }

    if (oldDoc != newDoc && oldDoc->MayHaveDOMMutationObservers()) {
      newDoc->SetMayHaveDOMMutationObservers();
    }

    if (oldDoc != newDoc && oldDoc->MayHaveAnimationObservers()) {
      newDoc->SetMayHaveAnimationObservers();
    }

    if (elem) {
      elem->RecompileScriptEventListeners();
    }

    if (aReparentScope) {
      AutoJSContext cx;
      JS::Rooted<JSObject*> wrapper(cx);
      if ((wrapper = aNode->GetWrapper())) {
        MOZ_ASSERT(IsDOMObject(wrapper));
        JSAutoCompartment ac(cx, wrapper);
        rv = ReparentWrapper(cx, wrapper);
        if (NS_FAILED(rv)) {
          if (wasRegistered) {
            aNode->OwnerDoc()->UnregisterActivityObserver(aNode->AsElement());
          }
          aNode->mNodeInfo.swap(newNodeInfo);
          if (wasRegistered) {
            aNode->OwnerDoc()->RegisterActivityObserver(aNode->AsElement());
          }
          return rv;
        }
      }
    }
  }

  if (aNode->HasProperties()) {
    bool ok = aNodesWithProperties.AppendObject(aNode);
    MOZ_RELEASE_ASSERT(ok, "Out of memory");
    if (aClone) {
      ok = aNodesWithProperties.AppendObject(clone);
      MOZ_RELEASE_ASSERT(ok, "Out of memory");
    }
  }

  if (aDeep && (!aClone || !aNode->IsNodeOfType(nsINode::eATTRIBUTE))) {
    // aNode's children.
    for (nsIContent* cloneChild = aNode->GetFirstChild();
         cloneChild;
         cloneChild = cloneChild->GetNextSibling()) {
      nsCOMPtr<nsINode> child;
      rv = CloneAndAdopt(cloneChild, aClone, true, nodeInfoManager,
                         aReparentScope, aNodesWithProperties, clone,
                         getter_AddRefs(child));
      NS_ENSURE_SUCCESS(rv, rv);
    }
  }

  // Cloning template element.
  if (aDeep && aClone && IsTemplateElement(aNode)) {
    DocumentFragment* origContent =
      static_cast<HTMLTemplateElement*>(aNode)->Content();
    DocumentFragment* cloneContent =
      static_cast<HTMLTemplateElement*>(clone.get())->Content();

    // Clone the children into the clone's template content owner
    // document's nodeinfo manager.
    nsNodeInfoManager* ownerNodeInfoManager =
      cloneContent->mNodeInfo->NodeInfoManager();

    for (nsIContent* cloneChild = origContent->GetFirstChild();
         cloneChild;
         cloneChild = cloneChild->GetNextSibling()) {
      nsCOMPtr<nsINode> child;
      rv = CloneAndAdopt(cloneChild, aClone, aDeep, ownerNodeInfoManager,
                         aReparentScope, aNodesWithProperties, cloneContent,
                         getter_AddRefs(child));
      NS_ENSURE_SUCCESS(rv, rv);
    }
  }

  // XXX setting document on some nodes not in a document so XBL will bind
  // and chrome won't break. Make XBL bind to document-less nodes!
  // XXXbz Once this is fixed, fix up the asserts in all implementations of
  // BindToTree to assert what they would like to assert, and fix the
  // ChangeDocumentFor() call in nsXULElement::BindToTree as well.  Also,
  // remove the UnbindFromTree call in ~nsXULElement, and add back in the
  // precondition in nsXULElement::UnbindFromTree and remove the line in
  // nsXULElement.h that makes nsNodeUtils a friend of nsXULElement.
  // Note: Make sure to do this witchery _after_ we've done any deep
  // cloning, so kids of the new node aren't confused about whether they're
  // in a document.
#ifdef MOZ_XUL
  if (aClone && !aParent && aNode->IsXULElement()) {
    if (!aNode->OwnerDoc()->IsLoadedAsInteractiveData()) {
      clone->SetFlags(NODE_FORCE_XBL_BINDINGS);
    }
  }
#endif

  clone.forget(aResult);

  return NS_OK;
}


/* static */
void
nsNodeUtils::UnlinkUserData(nsINode *aNode)
{
  NS_ASSERTION(aNode->HasProperties(), "Call to UnlinkUserData not needed.");

  // Strong reference to the document so that deleting properties can't
  // delete the document.
  nsCOMPtr<nsIDocument> document = aNode->OwnerDoc();
  document->PropertyTable(DOM_USER_DATA)->DeleteAllPropertiesFor(aNode);
}

bool
nsNodeUtils::IsTemplateElement(const nsINode *aNode)
{
  return aNode->IsHTMLElement(nsGkAtoms::_template);
}

nsIContent*
nsNodeUtils::GetFirstChildOfTemplateOrNode(nsINode* aNode)
{
  if (nsNodeUtils::IsTemplateElement(aNode)) {
    DocumentFragment* frag =
      static_cast<HTMLTemplateElement*>(aNode)->Content();
    return frag->GetFirstChild();
  }

  return aNode->GetFirstChild();
}