Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 190 insertions, 0 deletions

diff --git a/dom/svg/DOMSVGPoint.h b/dom/svg/DOMSVGPoint.h
new file mode 100644
index 0000000000..f75dc0d6e2
--- /dev/null
+++ b/dom/svg/DOMSVGPoint.h
@@ -0,0 +1,190 @@
+/* -*- 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 DOM_SVG_DOMSVGPOINT_H_
+#define DOM_SVG_DOMSVGPOINT_H_
+
+#include "DOMSVGPointList.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsDebug.h"
+#include "SVGPoint.h"
+#include "nsWrapperCache.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/FloatingPoint.h"
+#include "mozilla/dom/SVGSVGElement.h"
+#include "mozilla/gfx/2D.h"
+
+#define MOZ_SVG_LIST_INDEX_BIT_COUNT 30
+
+namespace mozilla {
+
+namespace dom {
+struct DOMMatrix2DInit;
+
+/**
+ * Class DOMSVGPoint
+ *
+ * This class creates the DOM objects that wrap internal SVGPoint objects that
+ * are in an SVGPointList. It is also used to create the objects returned by
+ * SVGSVGElement.createSVGPoint() and other functions that return DOM SVGPoint
+ * objects.
+ *
+ * See the architecture comment in DOMSVGPointList.h for an overview of the
+ * important points regarding these DOM wrapper structures.
+ *
+ * See the architecture comment in DOMSVGLength.h (yes, LENGTH) for an overview
+ * of the important points regarding how this specific class works.
+ */
+class DOMSVGPoint final : public nsWrapperCache {
+  template <class T>
+  friend class AutoChangePointListNotifier;
+
+  using Point = gfx::Point;
+
+ public:
+  /**
+   * Generic ctor for DOMSVGPoint objects that are created for an attribute.
+   */
+  DOMSVGPoint(DOMSVGPointList* aList, uint32_t aListIndex, bool aIsAnimValItem)
+      : mVal(nullptr),
+        mOwner(aList),
+        mListIndex(aListIndex),
+        mIsAnimValItem(aIsAnimValItem),
+        mIsTranslatePoint(false) {
+    // These shifts are in sync with the members.
+    MOZ_ASSERT(aList && aListIndex <= MaxListIndex(), "bad arg");
+
+    MOZ_ASSERT(IndexIsValid(), "Bad index for DOMSVGPoint!");
+  }
+
+  // Constructor for unowned points and SVGSVGElement.createSVGPoint
+  explicit DOMSVGPoint(const Point& aPt)
+      : mListIndex(0), mIsAnimValItem(false), mIsTranslatePoint(false) {
+    // In this case we own mVal
+    mVal = new SVGPoint(aPt.x, aPt.y);
+  }
+
+ private:
+  // The translate of an SVGSVGElement
+  DOMSVGPoint(SVGPoint* aPt, SVGSVGElement* aSVGSVGElement)
+      : mVal(aPt),
+        mOwner(ToSupports(aSVGSVGElement)),
+        mListIndex(0),
+        mIsAnimValItem(false),
+        mIsTranslatePoint(true) {}
+
+  virtual ~DOMSVGPoint() { CleanupWeakRefs(); }
+
+ public:
+  NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(DOMSVGPoint)
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(DOMSVGPoint)
+
+  static already_AddRefed<DOMSVGPoint> GetTranslateTearOff(
+      SVGPoint* aVal, SVGSVGElement* aSVGSVGElement);
+
+  bool IsInList() const { return HasOwner() && !IsTranslatePoint(); }
+
+  /**
+   * "Owner" here means that the instance has an
+   * internal counterpart from which it gets its values. (A better name may
+   * be HasWrappee().)
+   */
+  bool HasOwner() const { return !!mOwner; }
+
+  bool IsTranslatePoint() const { return mIsTranslatePoint; }
+
+  void DidChangeTranslate();
+
+  /**
+   * This method is called to notify this DOM object that it is being inserted
+   * into a list, and give it the information it needs as a result.
+   *
+   * This object MUST NOT already belong to a list when this method is called.
+   * That's not to say that script can't move these DOM objects between
+   * lists - it can - it's just that the logic to handle that (and send out
+   * the necessary notifications) is located elsewhere (in DOMSVGPointList).)
+   */
+  void InsertingIntoList(DOMSVGPointList* aList, uint32_t aListIndex,
+                         bool aIsAnimValItem);
+
+  static uint32_t MaxListIndex() {
+    return (1U << MOZ_SVG_LIST_INDEX_BIT_COUNT) - 1;
+  }
+
+  /// This method is called to notify this object that its list index changed.
+  void UpdateListIndex(uint32_t aListIndex) { mListIndex = aListIndex; }
+
+  /**
+   * This method is called to notify this DOM object that it is about to be
+   * removed from its current DOM list so that it can first make a copy of its
+   * internal counterpart's values. (If it didn't do this, then it would
+   * "lose" its value on being removed.)
+   */
+  void RemovingFromList();
+
+  SVGPoint ToSVGPoint() { return InternalItem(); }
+
+  // WebIDL
+  float X();
+  void SetX(float aX, ErrorResult& rv);
+  float Y();
+  void SetY(float aY, ErrorResult& rv);
+  already_AddRefed<DOMSVGPoint> MatrixTransform(const DOMMatrix2DInit& aMatrix,
+                                                ErrorResult& aRv);
+
+  nsISupports* GetParentObject() { return Element(); }
+
+  /**
+   * Returns true if our attribute is animating (in which case our animVal is
+   * not simply a mirror of our baseVal).
+   */
+  bool AttrIsAnimating() const;
+
+  JSObject* WrapObject(JSContext* cx,
+                       JS::Handle<JSObject*> aGivenProto) override;
+
+  DOMSVGPoint* Copy() { return new DOMSVGPoint(InternalItem()); }
+
+ private:
+#ifdef DEBUG
+  bool IndexIsValid();
+#endif
+
+  SVGElement* Element();
+
+  /**
+   * Clears soon-to-be-invalid weak references in external objects that were
+   * set up during the creation of this object. This should be called during
+   * destruction and during cycle collection.
+   */
+  void CleanupWeakRefs();
+
+  /**
+   * Get a reference to the internal SVGPoint list item that this DOM wrapper
+   * object currently wraps.
+   */
+  SVGPoint& InternalItem();
+
+  SVGPoint* mVal;              // If mIsTranslatePoint is true, the element owns
+                               // the value. Otherwise we do.
+  RefPtr<nsISupports> mOwner;  // If mIsTranslatePoint is true, this is an
+                               // SVGSVGElement, if we're unowned it's null, or
+                               // we're in a list and it's a DOMSVGPointList
+
+  // Bounds for the following are checked in the ctor, so be sure to update
+  // that if you change the capacity of any of the following.
+
+  uint32_t mListIndex : MOZ_SVG_LIST_INDEX_BIT_COUNT;
+  uint32_t mIsAnimValItem : 1;     // True if We're the animated value of a list
+  uint32_t mIsTranslatePoint : 1;  // true iff our owner is a SVGSVGElement
+};
+
+}  // namespace dom
+}  // namespace mozilla
+
+#undef MOZ_SVG_LIST_INDEX_BIT_COUNT
+
+#endif  // DOM_SVG_DOMSVGPOINT_H_