third_party/blink/renderer/core/svg/properties/svg_animated_property.cc

/*
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#include "third_party/blink/renderer/core/svg/properties/svg_animated_property.h"

#include "third_party/blink/renderer/core/svg/svg_element.h"

namespace blink {

SVGAnimatedPropertyBase::SVGAnimatedPropertyBase(
    AnimatedPropertyType type,
    SVGElement* context_element,
    const QualifiedName& attribute_name,
    CSSPropertyID css_property_id)
    : type_(type),
      // Cast to avoid warnings about unsafe bitfield truncations of the CSS
      // property enum. CSS properties that don't fit in this bitfield are never
      // used here. See static_assert in header.
      css_property_id_(static_cast<unsigned>(css_property_id)),
      base_value_needs_synchronization_(false),
      context_element_(context_element),
      attribute_name_(attribute_name) {
  DCHECK(context_element_);
  DCHECK(attribute_name_ != QualifiedName::Null());
  DCHECK_EQ(this->GetType(), type);
  DCHECK_EQ(this->CssPropertyId(), css_property_id);
}

SVGAnimatedPropertyBase::~SVGAnimatedPropertyBase() = default;

void SVGAnimatedPropertyBase::Trace(Visitor* visitor) {
  visitor->Trace(context_element_);
}

void SVGAnimatedPropertyBase::AnimationEnded() {
  SynchronizeAttribute();
}

bool SVGAnimatedPropertyBase::NeedsSynchronizeAttribute() const {
  // DOM attribute synchronization is only needed if a change has been made
  // through JavaScript (via a tear-off or primitive) or the property is being
  // animated. This prevents unnecessary attribute creation on the target
  // element.
  return base_value_needs_synchronization_ || IsAnimating();
}

void SVGAnimatedPropertyBase::SynchronizeAttribute() {
  AtomicString value(CurrentValueBase()->ValueAsString());
  context_element_->SetSynchronizedLazyAttribute(attribute_name_, value);
  base_value_needs_synchronization_ = false;
}

void SVGAnimatedPropertyBase::BaseValueChanged() {
  DCHECK(context_element_);
  DCHECK(attribute_name_ != QualifiedName::Null());
  base_value_needs_synchronization_ = true;
  context_element_->InvalidateSVGAttributes();
  context_element_->SvgAttributeBaseValChanged(attribute_name_);
}

void SVGAnimatedPropertyBase::EnsureAnimValUpdated() {
  DCHECK(context_element_);
  context_element_->EnsureAttributeAnimValUpdated();
}

bool SVGAnimatedPropertyBase::IsSpecified() const {
  return IsAnimating() || ContextElement()->hasAttribute(AttributeName());
}

}  // namespace blink