1 files changed, 191 insertions, 0 deletions
diff --git a/dom/svg/SVGAnimatedNumber.cpp b/dom/svg/SVGAnimatedNumber.cpp
new file mode 100644
index 0000000000..246f49db74
--- /dev/null
+++ b/dom/svg/SVGAnimatedNumber.cpp
@@ -0,0 +1,191 @@
+/* -*- 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/. */
+
+#include "SVGAnimatedNumber.h"
+
+#include "mozilla/Attributes.h"
+#include "mozilla/SMILValue.h"
+#include "mozilla/SVGContentUtils.h"
+#include "nsContentUtils.h"
+#include "SMILFloatType.h"
+#include "SVGAttrTearoffTable.h"
+
+using namespace mozilla::dom;
+
+namespace mozilla {
+
+/* Implementation */
+
+//----------------------------------------------------------------------
+// Helper class: AutoChangeNumberNotifier
+// Stack-based helper class to ensure DidChangeNumber is called.
+class MOZ_RAII AutoChangeNumberNotifier {
+ public:
+  AutoChangeNumberNotifier(SVGAnimatedNumber* aNumber, SVGElement* aSVGElement)
+      : mNumber(aNumber), mSVGElement(aSVGElement) {
+    MOZ_ASSERT(mNumber, "Expecting non-null number");
+    MOZ_ASSERT(mSVGElement, "Expecting non-null element");
+  }
+
+  ~AutoChangeNumberNotifier() {
+    mSVGElement->DidChangeNumber(mNumber->mAttrEnum);
+    if (mNumber->mIsAnimated) {
+      mSVGElement->AnimationNeedsResample();
+    }
+  }
+
+ private:
+  SVGAnimatedNumber* const mNumber;
+  SVGElement* const mSVGElement;
+};
+
+static SVGAttrTearoffTable<SVGAnimatedNumber,
+                           SVGAnimatedNumber::DOMAnimatedNumber>
+    sSVGAnimatedNumberTearoffTable;
+
+static bool GetValueFromString(const nsAString& aString,
+                               bool aPercentagesAllowed, float& aValue) {
+  bool success;
+  auto token = SVGContentUtils::GetAndEnsureOneToken(aString, success);
+
+  if (!success) {
+    return false;
+  }
+
+  RangedPtr<const char16_t> iter = SVGContentUtils::GetStartRangedPtr(token);
+  const RangedPtr<const char16_t> end = SVGContentUtils::GetEndRangedPtr(token);
+
+  if (!SVGContentUtils::ParseNumber(iter, end, aValue)) {
+    return false;
+  }
+
+  if (aPercentagesAllowed) {
+    const nsAString& units = Substring(iter.get(), end.get());
+    if (units.EqualsLiteral("%")) {
+      aValue /= 100;
+      return true;
+    }
+  }
+
+  return iter == end;
+}
+
+nsresult SVGAnimatedNumber::SetBaseValueString(const nsAString& aValueAsString,
+                                               SVGElement* aSVGElement) {
+  float val;
+
+  if (!GetValueFromString(aValueAsString,
+                          aSVGElement->NumberAttrAllowsPercentage(mAttrEnum),
+                          val)) {
+    return NS_ERROR_DOM_SYNTAX_ERR;
+  }
+
+  mBaseVal = val;
+  mIsBaseSet = true;
+  if (!mIsAnimated) {
+    mAnimVal = mBaseVal;
+  } else {
+    aSVGElement->AnimationNeedsResample();
+  }
+
+  // We don't need to call DidChange* here - we're only called by
+  // SVGElement::ParseAttribute under Element::SetAttr,
+  // which takes care of notifying.
+  return NS_OK;
+}
+
+void SVGAnimatedNumber::GetBaseValueString(nsAString& aValueAsString) {
+  aValueAsString.Truncate();
+  aValueAsString.AppendFloat(mBaseVal);
+}
+
+void SVGAnimatedNumber::SetBaseValue(float aValue, SVGElement* aSVGElement) {
+  if (mIsBaseSet && aValue == mBaseVal) {
+    return;
+  }
+
+  AutoChangeNumberNotifier notifier(this, aSVGElement);
+
+  mBaseVal = aValue;
+  mIsBaseSet = true;
+  if (!mIsAnimated) {
+    mAnimVal = mBaseVal;
+  }
+}
+
+void SVGAnimatedNumber::SetAnimValue(float aValue, SVGElement* aSVGElement) {
+  if (mIsAnimated && aValue == mAnimVal) {
+    return;
+  }
+  mAnimVal = aValue;
+  mIsAnimated = true;
+  aSVGElement->DidAnimateNumber(mAttrEnum);
+}
+
+already_AddRefed<DOMSVGAnimatedNumber> SVGAnimatedNumber::ToDOMAnimatedNumber(
+    SVGElement* aSVGElement) {
+  RefPtr<DOMAnimatedNumber> domAnimatedNumber =
+      sSVGAnimatedNumberTearoffTable.GetTearoff(this);
+  if (!domAnimatedNumber) {
+    domAnimatedNumber = new DOMAnimatedNumber(this, aSVGElement);
+    sSVGAnimatedNumberTearoffTable.AddTearoff(this, domAnimatedNumber);
+  }
+
+  return domAnimatedNumber.forget();
+}
+
+SVGAnimatedNumber::DOMAnimatedNumber::~DOMAnimatedNumber() {
+  sSVGAnimatedNumberTearoffTable.RemoveTearoff(mVal);
+}
+
+UniquePtr<SMILAttr> SVGAnimatedNumber::ToSMILAttr(SVGElement* aSVGElement) {
+  return MakeUnique<SMILNumber>(this, aSVGElement);
+}
+
+nsresult SVGAnimatedNumber::SMILNumber::ValueFromString(
+    const nsAString& aStr,
+    const mozilla::dom::SVGAnimationElement* /*aSrcElement*/, SMILValue& aValue,
+    bool& aPreventCachingOfSandwich) const {
+  float value;
+
+  if (!GetValueFromString(
+          aStr, mSVGElement->NumberAttrAllowsPercentage(mVal->mAttrEnum),
+          value)) {
+    return NS_ERROR_DOM_SYNTAX_ERR;
+  }
+
+  SMILValue val(SMILFloatType::Singleton());
+  val.mU.mDouble = value;
+  aValue = val;
+  aPreventCachingOfSandwich = false;
+
+  return NS_OK;
+}
+
+SMILValue SVGAnimatedNumber::SMILNumber::GetBaseValue() const {
+  SMILValue val(SMILFloatType::Singleton());
+  val.mU.mDouble = mVal->mBaseVal;
+  return val;
+}
+
+void SVGAnimatedNumber::SMILNumber::ClearAnimValue() {
+  if (mVal->mIsAnimated) {
+    mVal->mIsAnimated = false;
+    mVal->mAnimVal = mVal->mBaseVal;
+    mSVGElement->DidAnimateNumber(mVal->mAttrEnum);
+  }
+}
+
+nsresult SVGAnimatedNumber::SMILNumber::SetAnimValue(const SMILValue& aValue) {
+  NS_ASSERTION(aValue.mType == SMILFloatType::Singleton(),
+               "Unexpected type to assign animated value");
+  if (aValue.mType == SMILFloatType::Singleton()) {
+    mVal->SetAnimValue(float(aValue.mU.mDouble), mSVGElement);
+  }
+  return NS_OK;
+}
+
+}  // namespace mozilla