1 files changed, 109 insertions, 0 deletions
diff --git a/dom/svg/nsSVGString.h b/dom/svg/nsSVGString.h
new file mode 100644
index 0000000000..a27743b662
--- /dev/null
+++ b/dom/svg/nsSVGString.h
@@ -0,0 +1,109 @@
+/* -*- 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 __NS_SVGSTRING_H__
+#define __NS_SVGSTRING_H__
+
+#include "nsAutoPtr.h"
+#include "nsError.h"
+#include "nsSVGElement.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/dom/SVGAnimatedString.h"
+
+class nsSVGString
+{
+
+public:
+  void Init(uint8_t aAttrEnum) {
+    mAnimVal = nullptr;
+    mAttrEnum = aAttrEnum;
+    mIsBaseSet = false;
+  }
+
+  void SetBaseValue(const nsAString& aValue,
+                    nsSVGElement *aSVGElement,
+                    bool aDoSetAttr);
+  void GetBaseValue(nsAString& aValue, const nsSVGElement *aSVGElement) const
+    { aSVGElement->GetStringBaseValue(mAttrEnum, aValue); }
+
+  void SetAnimValue(const nsAString& aValue, nsSVGElement *aSVGElement);
+  void GetAnimValue(nsAString& aValue, const nsSVGElement *aSVGElement) const;
+
+  // Returns true if the animated value of this string has been explicitly
+  // set (either by animation, or by taking on the base value which has been
+  // explicitly set by markup or a DOM call), false otherwise.
+  // If this returns false, the animated value is still valid, that is,
+  // useable, and represents the default base value of the attribute.
+  bool IsExplicitlySet() const
+    { return !!mAnimVal || mIsBaseSet; }
+
+  already_AddRefed<mozilla::dom::SVGAnimatedString>
+  ToDOMAnimatedString(nsSVGElement* aSVGElement);
+
+  // Returns a new nsISMILAttr object that the caller must delete
+  nsISMILAttr* ToSMILAttr(nsSVGElement *aSVGElement);
+
+private:
+
+  nsAutoPtr<nsString> mAnimVal;
+  uint8_t mAttrEnum; // element specified tracking for attribute
+  bool mIsBaseSet;
+
+public:
+  struct DOMAnimatedString final : public mozilla::dom::SVGAnimatedString
+  {
+    NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+    NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DOMAnimatedString)
+
+    DOMAnimatedString(nsSVGString* aVal, nsSVGElement* aSVGElement)
+      : mozilla::dom::SVGAnimatedString(aSVGElement)
+      , mVal(aVal)
+    {}
+
+    nsSVGString* mVal; // kept alive because it belongs to content
+
+    void GetBaseVal(nsAString & aResult) override
+    {
+      mVal->GetBaseValue(aResult, mSVGElement);
+    }
+
+    void SetBaseVal(const nsAString & aValue) override
+    {
+      mVal->SetBaseValue(aValue, mSVGElement, true);
+    }
+
+    void GetAnimVal(nsAString & aResult) override
+    {
+      mSVGElement->FlushAnimations();
+      mVal->GetAnimValue(aResult, mSVGElement);
+    }
+
+  private:
+    virtual ~DOMAnimatedString();
+  };
+  struct SMILString : public nsISMILAttr
+  {
+  public:
+    SMILString(nsSVGString *aVal, nsSVGElement *aSVGElement)
+      : mVal(aVal), mSVGElement(aSVGElement) {}
+
+    // These will stay alive because a nsISMILAttr only lives as long
+    // as the Compositing step, and DOM elements don't get a chance to
+    // die during that.
+    nsSVGString* mVal;
+    nsSVGElement* mSVGElement;
+
+    // nsISMILAttr methods
+    virtual nsresult ValueFromString(const nsAString& aStr,
+                                     const mozilla::dom::SVGAnimationElement *aSrcElement,
+                                     nsSMILValue& aValue,
+                                     bool& aPreventCachingOfSandwich) const override;
+    virtual nsSMILValue GetBaseValue() const override;
+    virtual void ClearAnimValue() override;
+    virtual nsresult SetAnimValue(const nsSMILValue& aValue) override;
+  };
+};
+#endif //__NS_SVGSTRING_H__