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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#ifndef DOMIntersectionObserver_h
#define DOMIntersectionObserver_h
#include "mozilla/dom/IntersectionObserverBinding.h"
#include "nsCSSValue.h"
#include "nsTArray.h"
using mozilla::dom::DOMRect;
using mozilla::dom::Element;
namespace mozilla {
namespace dom {
class DOMIntersectionObserver;
class DOMIntersectionObserverEntry final : public nsISupports,
public nsWrapperCache
{
~DOMIntersectionObserverEntry() {}
public:
DOMIntersectionObserverEntry(nsISupports* aOwner,
DOMHighResTimeStamp aTime,
RefPtr<DOMRect> aRootBounds,
RefPtr<DOMRect> aBoundingClientRect,
RefPtr<DOMRect> aIntersectionRect,
bool aIsIntersecting,
Element* aTarget,
double aIntersectionRatio)
: mOwner(aOwner),
mTime(aTime),
mRootBounds(aRootBounds),
mBoundingClientRect(aBoundingClientRect),
mIntersectionRect(aIntersectionRect),
mIsIntersecting(aIsIntersecting),
mTarget(aTarget),
mIntersectionRatio(aIntersectionRatio)
{
}
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DOMIntersectionObserverEntry)
nsISupports* GetParentObject() const
{
return mOwner;
}
virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override
{
return mozilla::dom::IntersectionObserverEntryBinding::Wrap(aCx, this, aGivenProto);
}
DOMHighResTimeStamp Time()
{
return mTime;
}
DOMRect* GetRootBounds()
{
return mRootBounds;
}
DOMRect* BoundingClientRect()
{
return mBoundingClientRect;
}
DOMRect* IntersectionRect()
{
return mIntersectionRect;
}
bool IsIntersecting()
{
return mIsIntersecting;
}
double IntersectionRatio()
{
return mIntersectionRatio;
}
Element* Target()
{
return mTarget;
}
protected:
nsCOMPtr<nsISupports> mOwner;
DOMHighResTimeStamp mTime;
RefPtr<DOMRect> mRootBounds;
RefPtr<DOMRect> mBoundingClientRect;
RefPtr<DOMRect> mIntersectionRect;
bool mIsIntersecting;
RefPtr<Element> mTarget;
double mIntersectionRatio;
};
#define NS_DOM_INTERSECTION_OBSERVER_IID \
{ 0x8570a575, 0xe303, 0x4d18, \
{ 0xb6, 0xb1, 0x4d, 0x2b, 0x49, 0xd8, 0xef, 0x94 } }
class DOMIntersectionObserver final : public nsISupports,
public nsWrapperCache
{
virtual ~DOMIntersectionObserver() {
Disconnect();
}
public:
DOMIntersectionObserver(already_AddRefed<nsPIDOMWindowInner>&& aOwner,
mozilla::dom::IntersectionCallback& aCb)
: mOwner(aOwner)
, mDocument(mOwner->GetExtantDoc())
, mCallback(&aCb)
, mConnected(false)
{
}
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DOMIntersectionObserver)
NS_DECLARE_STATIC_IID_ACCESSOR(NS_DOM_INTERSECTION_OBSERVER_IID)
static already_AddRefed<DOMIntersectionObserver>
Constructor(const mozilla::dom::GlobalObject& aGlobal,
mozilla::dom::IntersectionCallback& aCb,
mozilla::ErrorResult& aRv);
static already_AddRefed<DOMIntersectionObserver>
Constructor(const mozilla::dom::GlobalObject& aGlobal,
mozilla::dom::IntersectionCallback& aCb,
const mozilla::dom::IntersectionObserverInit& aOptions,
mozilla::ErrorResult& aRv);
virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override
{
return mozilla::dom::IntersectionObserverBinding::Wrap(aCx, this, aGivenProto);
}
nsISupports* GetParentObject() const
{
return mOwner;
}
Element* GetRoot() const {
return mRoot;
}
void GetRootMargin(mozilla::dom::DOMString& aRetVal);
void GetThresholds(nsTArray<double>& aRetVal);
void Observe(Element& aTarget);
void Unobserve(Element& aTarget);
void UnlinkTarget(Element& aTarget);
void Disconnect();
void TakeRecords(nsTArray<RefPtr<DOMIntersectionObserverEntry>>& aRetVal);
mozilla::dom::IntersectionCallback* IntersectionCallback() { return mCallback; }
bool SetRootMargin(const nsAString& aString);
void Update(nsIDocument* aDocument, DOMHighResTimeStamp time);
void Notify();
protected:
void Connect();
void QueueIntersectionObserverEntry(Element* aTarget,
DOMHighResTimeStamp time,
const Maybe<nsRect>& aRootRect,
const nsRect& aTargetRect,
const Maybe<nsRect>& aIntersectionRect,
double aIntersectionRatio);
nsCOMPtr<nsPIDOMWindowInner> mOwner;
RefPtr<nsIDocument> mDocument;
RefPtr<mozilla::dom::IntersectionCallback> mCallback;
RefPtr<Element> mRoot;
nsCSSRect mRootMargin;
nsTArray<double> mThresholds;
// Holds raw pointers which are explicitly cleared by UnlinkTarget().
nsTArray<Element*> mObservationTargets;
nsTArray<RefPtr<DOMIntersectionObserverEntry>> mQueuedEntries;
bool mConnected;
};
NS_DEFINE_STATIC_IID_ACCESSOR(DOMIntersectionObserver, NS_DOM_INTERSECTION_OBSERVER_IID)
} // namespace dom
} // namespace mozilla
#endif
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