1 files changed, 113 insertions, 0 deletions
diff --git a/dom/svg/DOMSVGPoint.h b/dom/svg/DOMSVGPoint.h
new file mode 100644
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+++ b/dom/svg/DOMSVGPoint.h
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+/* -*- 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 MOZILLA_DOMSVGPOINT_H__
+#define MOZILLA_DOMSVGPOINT_H__
+
+#include "DOMSVGPointList.h"
+#include "mozilla/gfx/2D.h"
+#include "nsDebug.h"
+#include "nsISVGPoint.h"
+#include "SVGPoint.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/FloatingPoint.h"
+
+class nsSVGElement;
+
+namespace mozilla {
+
+namespace dom {
+class SVGMatrix;
+} // namespace dom
+
+/**
+ * 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 nsISVGPoint
+{
+  friend class AutoChangePointNotifier;
+
+  typedef mozilla::gfx::Point Point;
+
+public:
+  /**
+   * Generic ctor for DOMSVGPoint objects that are created for an attribute.
+   */
+  DOMSVGPoint(DOMSVGPointList *aList,
+              uint32_t aListIndex,
+              bool aIsAnimValItem)
+    : nsISVGPoint()
+  {
+    mList = aList;
+    mListIndex = aListIndex;
+    mIsAnimValItem = aIsAnimValItem;
+
+    // These shifts are in sync with the members.
+    MOZ_ASSERT(aList && aListIndex <= MaxListIndex(), "bad arg");
+
+    MOZ_ASSERT(IndexIsValid(), "Bad index for DOMSVGPoint!");
+  }
+
+  explicit DOMSVGPoint(const DOMSVGPoint *aPt = nullptr)
+    : nsISVGPoint()
+  {
+    if (aPt) {
+      mPt = aPt->ToSVGPoint();
+    }
+  }
+
+  DOMSVGPoint(float aX, float aY)
+    : nsISVGPoint()
+  {
+    mPt.mX = aX;
+    mPt.mY = aY;
+  }
+
+  explicit DOMSVGPoint(const Point& aPt)
+    : nsISVGPoint()
+  {
+    mPt.mX = aPt.x;
+    mPt.mY = aPt.y;
+    NS_ASSERTION(IsFinite(mPt.mX) && IsFinite(mPt.mX),
+                 "DOMSVGPoint coords are not finite");
+  }
+
+
+  // WebIDL
+  virtual float X() override;
+  virtual void SetX(float aX, ErrorResult& rv) override;
+  virtual float Y() override;
+  virtual void SetY(float aY, ErrorResult& rv) override;
+  virtual already_AddRefed<nsISVGPoint> MatrixTransform(dom::SVGMatrix& matrix) override;
+  nsISupports* GetParentObject() override {
+    return mList;
+  }
+
+  virtual DOMSVGPoint* Copy() override {
+    return new DOMSVGPoint(this);
+  }
+
+protected:
+
+  nsSVGElement* Element() {
+    return mList->Element();
+  }
+};
+
+} // namespace mozilla
+
+#endif // MOZILLA_DOMSVGPOINT_H__