1 files changed, 101 insertions, 0 deletions
diff --git a/dom/svg/SVGAnimatedString.h b/dom/svg/SVGAnimatedString.h
new file mode 100644
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--- /dev/null
+++ b/dom/svg/SVGAnimatedString.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 DOM_SVG_SVGANIMATEDSTRING_H_
+#define DOM_SVG_SVGANIMATEDSTRING_H_
+
+#include "nsError.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/SMILAttr.h"
+#include "mozilla/SVGAnimatedClassOrString.h"
+#include "mozilla/dom/SVGElement.h"
+#include "mozilla/UniquePtr.h"
+
+namespace mozilla {
+
+class SMILValue;
+
+namespace dom {
+class SVGElement;
+}
+
+class SVGAnimatedString final : public SVGAnimatedClassOrString {
+ public:
+  using SVGElement = dom::SVGElement;
+
+  void Init(uint8_t aAttrEnum) {
+    mAnimVal = nullptr;
+    mAttrEnum = aAttrEnum;
+    mIsBaseSet = false;
+  }
+
+  void SetBaseValue(const nsAString& aValue, SVGElement* aSVGElement,
+                    bool aDoSetAttr) override;
+  void GetBaseValue(nsAString& aValue,
+                    const SVGElement* aSVGElement) const override {
+    aSVGElement->GetStringBaseValue(mAttrEnum, aValue);
+  }
+
+  void SetAnimValue(const nsAString& aValue, SVGElement* aSVGElement);
+  void GetAnimValue(nsAString& aResult,
+                    const SVGElement* aSVGElement) const override;
+
+  // 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,
+  // usable, and represents the default base value of the attribute.
+  bool IsExplicitlySet() const { return !!mAnimVal || mIsBaseSet; }
+
+  UniquePtr<SMILAttr> ToSMILAttr(SVGElement* aSVGElement);
+
+  SVGAnimatedString() = default;
+
+  SVGAnimatedString& operator=(const SVGAnimatedString& aOther) {
+    mAttrEnum = aOther.mAttrEnum;
+    mIsBaseSet = aOther.mIsBaseSet;
+    if (aOther.mAnimVal) {
+      mAnimVal = MakeUnique<nsString>(*aOther.mAnimVal);
+    }
+    return *this;
+  }
+
+  SVGAnimatedString(const SVGAnimatedString& aOther) : SVGAnimatedString() {
+    *this = aOther;
+  }
+
+ private:
+  // FIXME: Should probably use void string rather than UniquePtr<nsString>.
+  UniquePtr<nsString> mAnimVal;
+  uint8_t mAttrEnum = 0;  // element specified tracking for attribute
+  bool mIsBaseSet = false;
+
+ public:
+  struct SMILString : public SMILAttr {
+   public:
+    SMILString(SVGAnimatedString* aVal, SVGElement* aSVGElement)
+        : mVal(aVal), mSVGElement(aSVGElement) {}
+
+    // These will stay alive because a SMILAttr only lives as long
+    // as the Compositing step, and DOM elements don't get a chance to
+    // die during that.
+    SVGAnimatedString* mVal;
+    SVGElement* mSVGElement;
+
+    // SMILAttr methods
+    nsresult ValueFromString(const nsAString& aStr,
+                             const dom::SVGAnimationElement* aSrcElement,
+                             SMILValue& aValue,
+                             bool& aPreventCachingOfSandwich) const override;
+    SMILValue GetBaseValue() const override;
+    void ClearAnimValue() override;
+    nsresult SetAnimValue(const SMILValue& aValue) override;
+  };
+};
+
+}  // namespace mozilla
+
+#endif  // DOM_SVG_SVGANIMATEDSTRING_H_