From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 dom/base/DOMIntersectionObserver.h | 183 +++++++++++++++++++++++++++++++++++++
 1 file changed, 183 insertions(+)
 create mode 100644 dom/base/DOMIntersectionObserver.h

(limited to 'dom/base/DOMIntersectionObserver.h')

diff --git a/dom/base/DOMIntersectionObserver.h b/dom/base/DOMIntersectionObserver.h
new file mode 100644
index 000000000..3eb10ad38
--- /dev/null
+++ b/dom/base/DOMIntersectionObserver.h
@@ -0,0 +1,183 @@
+/* -*- 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/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,
+                               Element* aTarget,
+                               double aIntersectionRatio)
+  : mOwner(aOwner),
+    mTime(aTime),
+    mRootBounds(aRootBounds),
+    mBoundingClientRect(aBoundingClientRect),
+    mIntersectionRect(aIntersectionRect),
+    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;
+  }
+
+  double IntersectionRatio()
+  {
+    return mIntersectionRatio;
+  }
+
+  Element* Target()
+  {
+    return mTarget;
+  }
+
+protected:
+  nsCOMPtr<nsISupports> mOwner;
+  DOMHighResTimeStamp   mTime;
+  RefPtr<DOMRect>       mRootBounds;
+  RefPtr<DOMRect>       mBoundingClientRect;
+  RefPtr<DOMRect>       mIntersectionRect;
+  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), 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);
+
+  bool 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<mozilla::dom::IntersectionCallback>      mCallback;
+  RefPtr<Element>                                 mRoot;
+  nsCSSRect                                       mRootMargin;
+  nsTArray<double>                                mThresholds;
+  nsTHashtable<nsPtrHashKey<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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