1 files changed, 137 insertions, 0 deletions
diff --git a/dom/svg/SVGPreserveAspectRatio.h b/dom/svg/SVGPreserveAspectRatio.h
new file mode 100644
index 000000000..69fe860df
--- /dev/null
+++ b/dom/svg/SVGPreserveAspectRatio.h
@@ -0,0 +1,137 @@
+/* -*- 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_CONTENT_SVGPRESERVEASPECTRATIO_H_
+#define MOZILLA_CONTENT_SVGPRESERVEASPECTRATIO_H_
+
+#include "mozilla/HashFunctions.h"  // for HashGeneric
+
+#include "nsWrapperCache.h"
+#include "nsCycleCollectionParticipant.h"
+#include "mozilla/ErrorResult.h"
+#include "nsSVGElement.h"
+
+namespace mozilla {
+// Alignment Types
+enum SVGAlign : uint8_t {
+  SVG_PRESERVEASPECTRATIO_UNKNOWN = 0,
+  SVG_PRESERVEASPECTRATIO_NONE = 1,
+  SVG_PRESERVEASPECTRATIO_XMINYMIN = 2,
+  SVG_PRESERVEASPECTRATIO_XMIDYMIN = 3,
+  SVG_PRESERVEASPECTRATIO_XMAXYMIN = 4,
+  SVG_PRESERVEASPECTRATIO_XMINYMID = 5,
+  SVG_PRESERVEASPECTRATIO_XMIDYMID = 6,
+  SVG_PRESERVEASPECTRATIO_XMAXYMID = 7,
+  SVG_PRESERVEASPECTRATIO_XMINYMAX = 8,
+  SVG_PRESERVEASPECTRATIO_XMIDYMAX = 9,
+  SVG_PRESERVEASPECTRATIO_XMAXYMAX = 10
+};
+
+// 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 = SVG_PRESERVEASPECTRATIO_NONE;
+const uint16_t SVG_ALIGN_MAX_VALID = SVG_PRESERVEASPECTRATIO_XMAXYMAX;
+
+// Meet-or-slice Types
+enum SVGMeetOrSlice : uint8_t {
+  SVG_MEETORSLICE_UNKNOWN = 0,
+  SVG_MEETORSLICE_MEET = 1,
+  SVG_MEETORSLICE_SLICE = 2
+};
+
+// 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 = SVG_MEETORSLICE_MEET;
+const uint16_t SVG_MEETORSLICE_MAX_VALID = SVG_MEETORSLICE_SLICE;
+
+class SVGAnimatedPreserveAspectRatio;
+
+class SVGPreserveAspectRatio final
+{
+  friend class SVGAnimatedPreserveAspectRatio;
+public:
+  SVGPreserveAspectRatio(SVGAlign aAlign, SVGMeetOrSlice aMeetOrSlice)
+    : mAlign(aAlign)
+    , mMeetOrSlice(aMeetOrSlice)
+  {}
+
+  bool operator==(const SVGPreserveAspectRatio& aOther) const;
+
+  explicit SVGPreserveAspectRatio()
+    : mAlign(SVG_PRESERVEASPECTRATIO_UNKNOWN)
+    , mMeetOrSlice(SVG_MEETORSLICE_UNKNOWN)
+  {}
+
+  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;
+  }
+
+  SVGAlign GetAlign() const {
+    return static_cast<SVGAlign>(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;
+  }
+
+  SVGMeetOrSlice GetMeetOrSlice() const {
+    return static_cast<SVGMeetOrSlice>(mMeetOrSlice);
+  }
+
+  uint32_t 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 nsISupports,
+                                        public nsWrapperCache
+{
+public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DOMSVGPreserveAspectRatio)
+
+  DOMSVGPreserveAspectRatio(SVGAnimatedPreserveAspectRatio* aVal,
+                            nsSVGElement *aSVGElement,
+                            bool aIsBaseValue)
+    : mVal(aVal), mSVGElement(aSVGElement), mIsBaseValue(aIsBaseValue)
+  {
+  }
+
+  // WebIDL
+  nsSVGElement* 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<nsSVGElement> mSVGElement;
+  const bool mIsBaseValue;
+};
+
+} //namespace dom
+} //namespace mozilla
+
+#endif // MOZILLA_CONTENT_SVGPRESERVEASPECTRATIO_H_