1 files changed, 115 insertions, 0 deletions
diff --git a/dom/svg/SVGPreserveAspectRatio.h b/dom/svg/SVGPreserveAspectRatio.h
new file mode 100644
index 0000000000..d591f6f36c
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+++ b/dom/svg/SVGPreserveAspectRatio.h
@@ -0,0 +1,115 @@
+/* -*- 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_SVGPRESERVEASPECTRATIO_H_
+#define DOM_SVG_SVGPRESERVEASPECTRATIO_H_
+
+#include "mozilla/dom/SVGPreserveAspectRatioBinding.h"
+#include "mozilla/HashFunctions.h"  // for HashGeneric
+
+#include "nsWrapperCache.h"
+#include "nsCycleCollectionParticipant.h"
+#include "mozilla/dom/SVGElement.h"
+
+namespace mozilla {
+class ErrorResult;
+
+// These constants represent the range of valid enum values for the <align>
+// parameter. They exclude the sentinel _UNKNOWN value.
+const uint16_t SVG_ALIGN_MIN_VALID =
+    dom::SVGPreserveAspectRatio_Binding::SVG_PRESERVEASPECTRATIO_NONE;
+const uint16_t SVG_ALIGN_MAX_VALID =
+    dom::SVGPreserveAspectRatio_Binding::SVG_PRESERVEASPECTRATIO_XMAXYMAX;
+
+// These constants represent the range of valid enum values for the
+// <meetOrSlice> parameter. They exclude the sentinel _UNKNOWN value.
+const uint16_t SVG_MEETORSLICE_MIN_VALID =
+    dom::SVGPreserveAspectRatio_Binding::SVG_MEETORSLICE_MEET;
+const uint16_t SVG_MEETORSLICE_MAX_VALID =
+    dom::SVGPreserveAspectRatio_Binding::SVG_MEETORSLICE_SLICE;
+
+class SVGAnimatedPreserveAspectRatio;
+
+class SVGPreserveAspectRatio final {
+  friend class SVGAnimatedPreserveAspectRatio;
+
+ public:
+  explicit SVGPreserveAspectRatio()
+      : mAlign(dom::SVGPreserveAspectRatio_Binding::
+                   SVG_PRESERVEASPECTRATIO_UNKNOWN),
+        mMeetOrSlice(
+            dom::SVGPreserveAspectRatio_Binding::SVG_MEETORSLICE_UNKNOWN) {}
+
+  SVGPreserveAspectRatio(uint8_t aAlign, uint8_t aMeetOrSlice)
+      : mAlign(aAlign), mMeetOrSlice(aMeetOrSlice) {}
+
+  static nsresult FromString(const nsAString& aString,
+                             SVGPreserveAspectRatio* aValue);
+  void ToString(nsAString& aValueAsString) const;
+
+  bool operator==(const SVGPreserveAspectRatio& aOther) const;
+
+  nsresult SetAlign(uint16_t aAlign) {
+    if (aAlign < SVG_ALIGN_MIN_VALID || aAlign > SVG_ALIGN_MAX_VALID)
+      return NS_ERROR_FAILURE;
+    mAlign = static_cast<uint8_t>(aAlign);
+    return NS_OK;
+  }
+
+  auto GetAlign() const { return mAlign; }
+
+  nsresult SetMeetOrSlice(uint16_t aMeetOrSlice) {
+    if (aMeetOrSlice < SVG_MEETORSLICE_MIN_VALID ||
+        aMeetOrSlice > SVG_MEETORSLICE_MAX_VALID)
+      return NS_ERROR_FAILURE;
+    mMeetOrSlice = static_cast<uint8_t>(aMeetOrSlice);
+    return NS_OK;
+  }
+
+  auto GetMeetOrSlice() const { return mMeetOrSlice; }
+
+  PLDHashNumber Hash() const { return HashGeneric(mAlign, mMeetOrSlice); }
+
+ private:
+  // We can't use enum types here because some compilers fail to pack them.
+  uint8_t mAlign;
+  uint8_t mMeetOrSlice;
+};
+
+namespace dom {
+
+class DOMSVGPreserveAspectRatio final : public nsWrapperCache {
+ public:
+  NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(DOMSVGPreserveAspectRatio)
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(DOMSVGPreserveAspectRatio)
+
+  DOMSVGPreserveAspectRatio(SVGAnimatedPreserveAspectRatio* aVal,
+                            SVGElement* aSVGElement, bool aIsBaseValue)
+      : mVal(aVal), mSVGElement(aSVGElement), mIsBaseValue(aIsBaseValue) {}
+
+  // WebIDL
+  SVGElement* GetParentObject() const { return mSVGElement; }
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
+  uint16_t Align();
+  void SetAlign(uint16_t aAlign, ErrorResult& rv);
+  uint16_t MeetOrSlice();
+  void SetMeetOrSlice(uint16_t aMeetOrSlice, ErrorResult& rv);
+
+ protected:
+  ~DOMSVGPreserveAspectRatio();
+
+  SVGAnimatedPreserveAspectRatio*
+      mVal;  // kept alive because it belongs to mSVGElement
+  RefPtr<SVGElement> mSVGElement;
+  const bool mIsBaseValue;
+};
+
+}  // namespace dom
+}  // namespace mozilla
+
+#endif  // DOM_SVG_SVGPRESERVEASPECTRATIO_H_