зеркало из https://github.com/mozilla/gecko-dev.git
205 строки
7.4 KiB
C++
205 строки
7.4 KiB
C++
/* -*- 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/. */
|
|
|
|
#ifndef DOMIntersectionObserver_h
|
|
#define DOMIntersectionObserver_h
|
|
|
|
#include "mozilla/Attributes.h"
|
|
#include "mozilla/dom/IntersectionObserverBinding.h"
|
|
#include "mozilla/ServoStyleConsts.h"
|
|
#include "mozilla/Variant.h"
|
|
#include "nsDOMNavigationTiming.h"
|
|
#include "nsTArray.h"
|
|
#include "nsTHashSet.h"
|
|
|
|
namespace mozilla::dom {
|
|
|
|
class DOMIntersectionObserver;
|
|
|
|
class DOMIntersectionObserverEntry final : public nsISupports,
|
|
public nsWrapperCache {
|
|
~DOMIntersectionObserverEntry() = default;
|
|
|
|
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(std::move(aRootBounds)),
|
|
mBoundingClientRect(std::move(aBoundingClientRect)),
|
|
mIntersectionRect(std::move(aIntersectionRect)),
|
|
mIsIntersecting(aIsIntersecting),
|
|
mTarget(aTarget),
|
|
mIntersectionRatio(aIntersectionRatio) {}
|
|
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
|
|
NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(DOMIntersectionObserverEntry)
|
|
|
|
nsISupports* GetParentObject() const { return mOwner; }
|
|
|
|
JSObject* WrapObject(JSContext* aCx,
|
|
JS::Handle<JSObject*> aGivenProto) override {
|
|
return IntersectionObserverEntry_Binding::Wrap(aCx, this, aGivenProto);
|
|
}
|
|
|
|
DOMHighResTimeStamp Time() const { return mTime; }
|
|
|
|
DOMRect* GetRootBounds() { return mRootBounds; }
|
|
|
|
DOMRect* BoundingClientRect() { return mBoundingClientRect; }
|
|
|
|
DOMRect* IntersectionRect() { return mIntersectionRect; }
|
|
|
|
bool IsIntersecting() const { return mIsIntersecting; }
|
|
|
|
double IntersectionRatio() const { 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 \
|
|
} \
|
|
}
|
|
|
|
// An input suitable to compute intersections with multiple targets.
|
|
struct IntersectionInput {
|
|
// Whether the root is implicit (null, originally).
|
|
const bool mIsImplicitRoot = false;
|
|
// The computed root node. For the implicit root, this will be the in-process
|
|
// root document we can compute coordinates against (along with the remote
|
|
// document visible rect if appropriate).
|
|
const nsINode* mRootNode = nullptr;
|
|
nsIFrame* mRootFrame = nullptr;
|
|
// The rect of mRootFrame in client coordinates.
|
|
nsRect mRootRect;
|
|
// The root margin computed against the root rect.
|
|
nsMargin mRootMargin;
|
|
// If this is in an OOP iframe, the visible rect of the OOP frame.
|
|
Maybe<nsRect> mRemoteDocumentVisibleRect;
|
|
};
|
|
|
|
struct IntersectionOutput {
|
|
const bool mIsSimilarOrigin;
|
|
const nsRect mRootBounds;
|
|
const nsRect mTargetRect;
|
|
const Maybe<nsRect> mIntersectionRect;
|
|
|
|
bool Intersects() const { return mIntersectionRect.isSome(); }
|
|
};
|
|
|
|
class DOMIntersectionObserver final : public nsISupports,
|
|
public nsWrapperCache {
|
|
virtual ~DOMIntersectionObserver() { Disconnect(); }
|
|
|
|
using NativeCallback = void (*)(
|
|
const Sequence<OwningNonNull<DOMIntersectionObserverEntry>>& aEntries);
|
|
DOMIntersectionObserver(Document&, NativeCallback);
|
|
|
|
public:
|
|
DOMIntersectionObserver(already_AddRefed<nsPIDOMWindowInner>&& aOwner,
|
|
dom::IntersectionCallback& aCb);
|
|
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 GlobalObject&, dom::IntersectionCallback&, ErrorResult&);
|
|
static already_AddRefed<DOMIntersectionObserver> Constructor(
|
|
const GlobalObject&, dom::IntersectionCallback&,
|
|
const IntersectionObserverInit&, ErrorResult&);
|
|
|
|
JSObject* WrapObject(JSContext* aCx,
|
|
JS::Handle<JSObject*> aGivenProto) override {
|
|
return IntersectionObserver_Binding::Wrap(aCx, this, aGivenProto);
|
|
}
|
|
|
|
nsISupports* GetParentObject() const;
|
|
|
|
nsINode* GetRoot() const { return mRoot; }
|
|
|
|
void GetRootMargin(nsACString&);
|
|
bool SetRootMargin(const nsACString&);
|
|
|
|
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);
|
|
|
|
static IntersectionInput ComputeInput(
|
|
const Document& aDocument, const nsINode* aRoot,
|
|
const StyleRect<LengthPercentage>* aRootMargin);
|
|
|
|
enum class IsForProximityToViewport : bool { No, Yes };
|
|
static IntersectionOutput Intersect(
|
|
const IntersectionInput&, const Element&,
|
|
IsForProximityToViewport = IsForProximityToViewport::No);
|
|
// Intersects with a given rect, already relative to the root frame.
|
|
static IntersectionOutput Intersect(const IntersectionInput&, const nsRect&);
|
|
|
|
void Update(Document& aDocument, DOMHighResTimeStamp time);
|
|
MOZ_CAN_RUN_SCRIPT void Notify();
|
|
|
|
static already_AddRefed<DOMIntersectionObserver> CreateLazyLoadObserver(
|
|
Document&);
|
|
|
|
static Maybe<nsRect> EdgeInclusiveIntersection(const nsRect& aRect,
|
|
const nsRect& aOtherRect);
|
|
|
|
protected:
|
|
void Connect();
|
|
void QueueIntersectionObserverEntry(Element* aTarget,
|
|
DOMHighResTimeStamp time,
|
|
const Maybe<nsRect>& aRootRect,
|
|
const nsRect& aTargetRect,
|
|
const Maybe<nsRect>& aIntersectionRect,
|
|
bool aIsIntersecting,
|
|
double aIntersectionRatio);
|
|
|
|
nsCOMPtr<nsPIDOMWindowInner> mOwner;
|
|
RefPtr<Document> mDocument;
|
|
Variant<RefPtr<dom::IntersectionCallback>, NativeCallback> mCallback;
|
|
RefPtr<nsINode> mRoot;
|
|
StyleRect<LengthPercentage> mRootMargin;
|
|
AutoTArray<double, 1> mThresholds;
|
|
|
|
// These hold raw pointers which are explicitly cleared by UnlinkTarget().
|
|
//
|
|
// We keep a set and an array because we need ordered access, but also
|
|
// constant time lookup.
|
|
nsTArray<Element*> mObservationTargets;
|
|
nsTHashSet<Element*> mObservationTargetSet;
|
|
|
|
nsTArray<RefPtr<DOMIntersectionObserverEntry>> mQueuedEntries;
|
|
bool mConnected = false;
|
|
};
|
|
|
|
NS_DEFINE_STATIC_IID_ACCESSOR(DOMIntersectionObserver,
|
|
NS_DOM_INTERSECTION_OBSERVER_IID)
|
|
|
|
} // namespace mozilla::dom
|
|
|
|
#endif
|