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-rw-r--r--dom/base/DOMIntersectionObserver.cpp37
-rw-r--r--dom/base/DOMIntersectionObserver.h4
-rw-r--r--dom/base/Element.cpp45
-rw-r--r--dom/base/Element.h2
-rw-r--r--dom/base/FragmentOrElement.cpp8
-rw-r--r--dom/base/FragmentOrElement.h8
-rw-r--r--dom/base/nsDocument.cpp3
-rw-r--r--dom/base/nsNodeUtils.cpp9
-rw-r--r--dom/base/test/test_intersectionobservers.html59
9 files changed, 111 insertions, 64 deletions
diff --git a/dom/base/DOMIntersectionObserver.cpp b/dom/base/DOMIntersectionObserver.cpp
index 169c3fe7a..e39abf1a6 100644
--- a/dom/base/DOMIntersectionObserver.cpp
+++ b/dom/base/DOMIntersectionObserver.cpp
@@ -47,6 +47,7 @@ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(DOMIntersectionObserver)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mCallback)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mRoot)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mQueuedEntries)
+ tmp->Disconnect();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(DOMIntersectionObserver)
@@ -184,9 +185,10 @@ DOMIntersectionObserver::Connect()
if (mConnected) {
return;
}
+ mConnected = true;
+
nsIDocument* document = mOwner->GetExtantDoc();
document->AddIntersectionObserver(this);
- mConnected = true;
}
void
@@ -202,7 +204,9 @@ DOMIntersectionObserver::Disconnect()
mObservationTargets.Clear();
if (mOwner) {
nsIDocument* document = mOwner->GetExtantDoc();
- document->RemoveIntersectionObserver(this);
+ if (document) {
+ document->RemoveIntersectionObserver(this);
+ }
}
mConnected = false;
}
@@ -248,6 +252,12 @@ EdgeInclusiveIntersection(const nsRect& aRect, const nsRect& aOtherRect)
return Some(nsRect(left, top, right - left, bottom - top));
}
+enum class BrowsingContextInfo {
+ SimilarOriginBrowsingContext,
+ DifferentOriginBrowsingContext,
+ UnknownBrowsingContext
+};
+
void
DOMIntersectionObserver::Update(nsIDocument* aDocument, DOMHighResTimeStamp time)
{
@@ -359,11 +369,22 @@ DOMIntersectionObserver::Update(nsIDocument* aDocument, DOMHighResTimeStamp time
}
}
- nsRect rootIntersectionRect = rootRect;
- bool isInSimilarOriginBrowsingContext = rootFrame && targetFrame &&
- CheckSimilarOrigin(root, target);
+ nsRect rootIntersectionRect;
+ BrowsingContextInfo isInSimilarOriginBrowsingContext =
+ BrowsingContextInfo::UnknownBrowsingContext;
+
+ if (rootFrame && targetFrame) {
+ rootIntersectionRect = rootRect;
+ }
+
+ if (root && target) {
+ isInSimilarOriginBrowsingContext = CheckSimilarOrigin(root, target) ?
+ BrowsingContextInfo::SimilarOriginBrowsingContext :
+ BrowsingContextInfo::DifferentOriginBrowsingContext;
+ }
- if (isInSimilarOriginBrowsingContext) {
+ if (isInSimilarOriginBrowsingContext ==
+ BrowsingContextInfo::SimilarOriginBrowsingContext) {
rootIntersectionRect.Inflate(rootMargin);
}
@@ -413,7 +434,9 @@ DOMIntersectionObserver::Update(nsIDocument* aDocument, DOMHighResTimeStamp time
if (target->UpdateIntersectionObservation(this, threshold)) {
QueueIntersectionObserverEntry(
target, time,
- isInSimilarOriginBrowsingContext ? Some(rootIntersectionRect) : Nothing(),
+ isInSimilarOriginBrowsingContext ==
+ BrowsingContextInfo::DifferentOriginBrowsingContext ?
+ Nothing() : Some(rootIntersectionRect),
targetRect, intersectionRect, intersectionRatio
);
}
diff --git a/dom/base/DOMIntersectionObserver.h b/dom/base/DOMIntersectionObserver.h
index 3eb10ad38..8144fc5c5 100644
--- a/dom/base/DOMIntersectionObserver.h
+++ b/dom/base/DOMIntersectionObserver.h
@@ -101,9 +101,7 @@ protected:
class DOMIntersectionObserver final : public nsISupports,
public nsWrapperCache
{
- virtual ~DOMIntersectionObserver() {
- Disconnect();
- }
+ virtual ~DOMIntersectionObserver() { }
public:
DOMIntersectionObserver(already_AddRefed<nsPIDOMWindowInner>&& aOwner,
diff --git a/dom/base/Element.cpp b/dom/base/Element.cpp
index 092755590..52d06b0f8 100644
--- a/dom/base/Element.cpp
+++ b/dom/base/Element.cpp
@@ -3912,44 +3912,55 @@ Element::ClearDataset()
slots->mDataset = nullptr;
}
-nsTArray<Element::nsDOMSlots::IntersectionObserverRegistration>*
+nsDataHashtable<nsPtrHashKey<DOMIntersectionObserver>, int32_t>*
Element::RegisteredIntersectionObservers()
{
nsDOMSlots* slots = DOMSlots();
return &slots->mRegisteredIntersectionObservers;
}
+enum nsPreviousIntersectionThreshold {
+ eUninitialized = -2,
+ eNonIntersecting = -1
+};
+
void
Element::RegisterIntersectionObserver(DOMIntersectionObserver* aObserver)
{
- RegisteredIntersectionObservers()->AppendElement(
- nsDOMSlots::IntersectionObserverRegistration { aObserver, -1 });
+ nsDataHashtable<nsPtrHashKey<DOMIntersectionObserver>, int32_t>* observers =
+ RegisteredIntersectionObservers();
+ if (observers->Contains(aObserver)) {
+ return;
+ }
+
+ // Value can be:
+ // -2: Makes sure next calculated threshold always differs, leading to a
+ // notification task being scheduled.
+ // -1: Non-intersecting.
+ // >= 0: Intersecting, valid index of aObserver->mThresholds.
+ RegisteredIntersectionObservers()->Put(aObserver, eUninitialized);
}
void
Element::UnregisterIntersectionObserver(DOMIntersectionObserver* aObserver)
{
- nsTArray<nsDOMSlots::IntersectionObserverRegistration>* observers =
+ nsDataHashtable<nsPtrHashKey<DOMIntersectionObserver>, int32_t>* observers =
RegisteredIntersectionObservers();
- for (uint32_t i = 0; i < observers->Length(); ++i) {
- nsDOMSlots::IntersectionObserverRegistration reg = observers->ElementAt(i);
- if (reg.observer == aObserver) {
- observers->RemoveElementAt(i);
- break;
- }
- }
+ observers->Remove(aObserver);
}
bool
Element::UpdateIntersectionObservation(DOMIntersectionObserver* aObserver, int32_t aThreshold)
{
- nsTArray<nsDOMSlots::IntersectionObserverRegistration>* observers =
+ nsDataHashtable<nsPtrHashKey<DOMIntersectionObserver>, int32_t>* observers =
RegisteredIntersectionObservers();
- for (auto& reg : *observers) {
- if (reg.observer == aObserver && reg.previousThreshold != aThreshold) {
- reg.previousThreshold = aThreshold;
- return true;
- }
+ if (!observers->Contains(aObserver)) {
+ return false;
+ }
+ int32_t previousThreshold = observers->Get(aObserver);
+ if (previousThreshold != aThreshold) {
+ observers->Put(aObserver, aThreshold);
+ return true;
}
return false;
}
diff --git a/dom/base/Element.h b/dom/base/Element.h
index cf1d197e2..049984d1b 100644
--- a/dom/base/Element.h
+++ b/dom/base/Element.h
@@ -1380,7 +1380,7 @@ protected:
nsDOMTokenList* GetTokenList(nsIAtom* aAtom,
const DOMTokenListSupportedTokenArray aSupportedTokens = nullptr);
- nsTArray<nsDOMSlots::IntersectionObserverRegistration>* RegisteredIntersectionObservers();
+ nsDataHashtable<nsPtrHashKey<DOMIntersectionObserver>, int32_t>* RegisteredIntersectionObservers();
private:
/**
diff --git a/dom/base/FragmentOrElement.cpp b/dom/base/FragmentOrElement.cpp
index b22a0d4ff..fde983e7c 100644
--- a/dom/base/FragmentOrElement.cpp
+++ b/dom/base/FragmentOrElement.cpp
@@ -608,6 +608,7 @@ FragmentOrElement::nsDOMSlots::Unlink(bool aIsXUL)
mLabelsList = nullptr;
mCustomElementData = nullptr;
mClassList = nullptr;
+ mRegisteredIntersectionObservers.Clear();
}
size_t
@@ -1359,6 +1360,13 @@ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(FragmentOrElement)
{
nsDOMSlots *slots = tmp->GetExistingDOMSlots();
if (slots) {
+ if (tmp->IsElement()) {
+ Element* elem = tmp->AsElement();
+ for (auto iter = slots->mRegisteredIntersectionObservers.Iter(); !iter.Done(); iter.Next()) {
+ DOMIntersectionObserver* observer = iter.Key();
+ observer->UnlinkTarget(*elem);
+ }
+ }
slots->Unlink(tmp->IsXULElement());
}
}
diff --git a/dom/base/FragmentOrElement.h b/dom/base/FragmentOrElement.h
index 1cd8033bb..7c74e9cd4 100644
--- a/dom/base/FragmentOrElement.h
+++ b/dom/base/FragmentOrElement.h
@@ -21,6 +21,7 @@
#include "nsIWeakReference.h" // base class
#include "nsNodeUtils.h" // class member nsNodeUtils::CloneNodeImpl
#include "nsIHTMLCollection.h"
+#include "nsDataHashtable.h"
class ContentUnbinder;
class nsContentList;
@@ -353,12 +354,7 @@ public:
/**
* Registered Intersection Observers on the element.
*/
- struct IntersectionObserverRegistration {
- DOMIntersectionObserver* observer;
- int32_t previousThreshold;
- };
-
- nsTArray<IntersectionObserverRegistration> mRegisteredIntersectionObservers;
+ nsDataHashtable<nsPtrHashKey<DOMIntersectionObserver>, int32_t> mRegisteredIntersectionObservers;
};
protected:
diff --git a/dom/base/nsDocument.cpp b/dom/base/nsDocument.cpp
index fd3b52948..8acfd901a 100644
--- a/dom/base/nsDocument.cpp
+++ b/dom/base/nsDocument.cpp
@@ -12507,7 +12507,8 @@ nsDocument::ScheduleIntersectionObserverNotification()
void
nsDocument::NotifyIntersectionObservers()
{
- for (const auto& observer : mIntersectionObservers) {
+ nsTArray<RefPtr<DOMIntersectionObserver>> observers(mIntersectionObservers);
+ for (const auto& observer : observers) {
observer->Notify();
}
}
diff --git a/dom/base/nsNodeUtils.cpp b/dom/base/nsNodeUtils.cpp
index 69a9414fe..ecea95dc1 100644
--- a/dom/base/nsNodeUtils.cpp
+++ b/dom/base/nsNodeUtils.cpp
@@ -297,15 +297,6 @@ nsNodeUtils::LastRelease(nsINode* aNode)
NodeWillBeDestroyed, (aNode));
}
- if (aNode->IsElement()) {
- Element* elem = aNode->AsElement();
- FragmentOrElement::nsDOMSlots* domSlots =
- static_cast<FragmentOrElement::nsDOMSlots*>(slots);
- for (auto& reg : domSlots->mRegisteredIntersectionObservers) {
- reg.observer->UnlinkTarget(*elem);
- }
- }
-
delete slots;
aNode->mSlots = nullptr;
}
diff --git a/dom/base/test/test_intersectionobservers.html b/dom/base/test/test_intersectionobservers.html
index e7875e3af..10e3d7712 100644
--- a/dom/base/test/test_intersectionobservers.html
+++ b/dom/base/test/test_intersectionobservers.html
@@ -325,7 +325,7 @@ limitations under the License.
});
- it('does not trigger if target does not intersect when observing begins',
+ it('does trigger if target does not intersect when observing begins',
function(done) {
var spy = sinon.spy();
@@ -334,7 +334,7 @@ limitations under the License.
targetEl2.style.top = '-40px';
io.observe(targetEl2);
callDelayed(function() {
- expect(spy.callCount).to.be(0);
+ expect(spy.callCount).to.be(1);
done();
}, ASYNC_TIMEOUT);
});
@@ -528,7 +528,7 @@ limitations under the License.
spy.waitForNotification(function() {
expect(spy.callCount).to.be(1);
var records = sortRecords(spy.lastCall.args[0]);
- expect(records.length).to.be(2);
+ expect(records.length).to.be(3);
expect(records[0].target).to.be(targetEl1);
expect(records[0].intersectionRatio).to.be(0.25);
expect(records[1].target).to.be(targetEl2);
@@ -636,10 +636,10 @@ limitations under the License.
expect(records.length).to.be(3);
expect(records[0].target).to.be(targetEl1);
expect(records[0].intersectionRatio).to.be(0.5);
- expect(records[1].target).to.be(targetEl3);
- expect(records[1].intersectionRatio).to.be(0.5);
- expect(records[2].target).to.be(targetEl4);
+ expect(records[2].target).to.be(targetEl3);
expect(records[2].intersectionRatio).to.be(0.5);
+ expect(records[3].target).to.be(targetEl4);
+ expect(records[3].intersectionRatio).to.be(0.5);
io.disconnect();
done();
}, {root: rootEl, rootMargin: '-10px 10%'});
@@ -652,11 +652,11 @@ limitations under the License.
function(done) {
io = new IntersectionObserver(function(records) {
records = sortRecords(records);
- expect(records.length).to.be(2);
+ expect(records.length).to.be(4);
expect(records[0].target).to.be(targetEl1);
expect(records[0].intersectionRatio).to.be(0.5);
- expect(records[1].target).to.be(targetEl4);
- expect(records[1].intersectionRatio).to.be(0.5);
+ expect(records[3].target).to.be(targetEl4);
+ expect(records[3].intersectionRatio).to.be(0.5);
io.disconnect();
done();
}, {root: rootEl, rootMargin: '-5% -2.5% 0px'});
@@ -669,13 +669,13 @@ limitations under the License.
function(done) {
io = new IntersectionObserver(function(records) {
records = sortRecords(records);
- expect(records.length).to.be(3);
+ expect(records.length).to.be(4);
expect(records[0].target).to.be(targetEl1);
expect(records[0].intersectionRatio).to.be(0.5);
expect(records[1].target).to.be(targetEl2);
expect(records[1].intersectionRatio).to.be(0.5);
- expect(records[2].target).to.be(targetEl4);
- expect(records[2].intersectionRatio).to.be(0.25);
+ expect(records[3].target).to.be(targetEl4);
+ expect(records[3].intersectionRatio).to.be(0.25);
io.disconnect();
done();
}, {root: rootEl, rootMargin: '5% -2.5% -10px -190px'});
@@ -705,9 +705,9 @@ limitations under the License.
spy.waitForNotification(function() {
expect(spy.callCount).to.be(1);
var records = sortRecords(spy.lastCall.args[0]);
- expect(records.length).to.be(1);
- expect(records[0].intersectionRatio).to.be(0);
- expect(records[0].target).to.be(targetEl2);
+ expect(records.length).to.be(2);
+ expect(records[1].intersectionRatio).to.be(0);
+ expect(records[1].target).to.be(targetEl2);
done();
}, ASYNC_TIMEOUT);
},
@@ -797,14 +797,14 @@ limitations under the License.
function(done) {
document.getElementById('fixtures').appendChild(rootEl);
callDelayed(function() {
- expect(spy.callCount).to.be(0);
+ expect(spy.callCount).to.be(1);
done();
}, ASYNC_TIMEOUT);
},
function(done) {
parentEl.insertBefore(targetEl1, targetEl2);
spy.waitForNotification(function() {
- expect(spy.callCount).to.be(1);
+ expect(spy.callCount).to.be(2);
var records = sortRecords(spy.lastCall.args[0]);
expect(records.length).to.be(1);
expect(records[0].intersectionRatio).to.be(1);
@@ -815,7 +815,7 @@ limitations under the License.
function(done) {
grandParentEl.parentNode.removeChild(grandParentEl);
spy.waitForNotification(function() {
- expect(spy.callCount).to.be(2);
+ expect(spy.callCount).to.be(3);
var records = sortRecords(spy.lastCall.args[0]);
expect(records.length).to.be(1);
expect(records[0].intersectionRatio).to.be(0);
@@ -826,7 +826,7 @@ limitations under the License.
function(done) {
rootEl.appendChild(targetEl1);
spy.waitForNotification(function() {
- expect(spy.callCount).to.be(3);
+ expect(spy.callCount).to.be(4);
var records = sortRecords(spy.lastCall.args[0]);
expect(records.length).to.be(1);
expect(records[0].intersectionRatio).to.be(1);
@@ -837,7 +837,7 @@ limitations under the License.
function(done) {
rootEl.parentNode.removeChild(rootEl);
spy.waitForNotification(function() {
- expect(spy.callCount).to.be(4);
+ expect(spy.callCount).to.be(5);
var records = sortRecords(spy.lastCall.args[0]);
expect(records.length).to.be(1);
expect(records[0].intersectionRatio).to.be(0);
@@ -867,8 +867,14 @@ limitations under the License.
targetEl1.style.top = '220px';
targetEl1.style.left = '220px';
+
+ var callCount = 0;
io = new IntersectionObserver(function(records) {
+ callCount++;
+ if (callCount <= 1) {
+ return;
+ }
expect(records.length).to.be(1);
expect(records[0].intersectionRatio).to.be(1);
done();
@@ -891,6 +897,19 @@ limitations under the License.
var win = window.open("intersectionobserver_window.html");
});
+ it('triggers only once if observed multiple times (and does not crash when collected)', function(done) {
+ var spy = sinon.spy();
+ io = new IntersectionObserver(spy, {root: rootEl});
+ io.observe(targetEl1);
+ io.observe(targetEl1);
+ io.observe(targetEl1);
+
+ callDelayed(function () {
+ expect(spy.callCount).to.be(1);
+ done();
+ }, ASYNC_TIMEOUT);
+ });
+
});
describe('observe subframe', function () {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 16:31:02 +0000