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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_STRING_KEYFRAME_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_ANIMATION_STRING_KEYFRAME_H_
#include "third_party/blink/renderer/core/animation/keyframe.h"
#include "third_party/blink/renderer/core/css/css_property_value_set.h"
#include "third_party/blink/renderer/platform/heap/heap.h"
#include "third_party/blink/renderer/platform/wtf/hash_map.h"
namespace blink {
class StyleSheetContents;
// An implementation of Keyframe used for CSS Animations, web-animations, and
// the HTML <marquee> element.
//
// A StringKeyframe instance supports an arbitrary number of (property, value)
// pairs. The properties can be CSS properties or SVG attributes, mapping to
// CSSValue or plain String values respectively. CSS properties added to a
// StringKeyframe are expanded to shorthand and de-duplicated, with newer
// properties replacing older ones. SVG attributes are similarly de-duplicated.
//
// TODO(smcgruer): By the spec, a StringKeyframe should not de-duplicate or
// expand shorthand properties; that is done for computed keyframes.
class CORE_EXPORT StringKeyframe : public Keyframe {
public:
StringKeyframe()
: css_property_map_(MakeGarbageCollected<MutableCSSPropertyValueSet>(
kHTMLStandardMode)),
presentation_attribute_map_(
MakeGarbageCollected<MutableCSSPropertyValueSet>(
kHTMLStandardMode)) {}
StringKeyframe(const StringKeyframe& copy_from);
MutableCSSPropertyValueSet::SetResult SetCSSPropertyValue(
const AtomicString& property_name,
const String& value,
SecureContextMode,
StyleSheetContents*);
MutableCSSPropertyValueSet::SetResult SetCSSPropertyValue(
CSSPropertyID,
const String& value,
SecureContextMode,
StyleSheetContents*);
void SetCSSPropertyValue(const CSSProperty&, const CSSValue&);
void SetPresentationAttributeValue(const CSSProperty&,
const String& value,
SecureContextMode,
StyleSheetContents*);
void SetSVGAttributeValue(const QualifiedName&, const String& value);
const CSSValue& CssPropertyValue(const PropertyHandle& property) const {
int index = -1;
if (property.IsCSSCustomProperty())
index =
css_property_map_->FindPropertyIndex(property.CustomPropertyName());
else
index = css_property_map_->FindPropertyIndex(
property.GetCSSProperty().PropertyID());
CHECK_GE(index, 0);
return css_property_map_->PropertyAt(static_cast<unsigned>(index)).Value();
}
const CSSValue& PresentationAttributeValue(
const CSSProperty& property) const {
int index =
presentation_attribute_map_->FindPropertyIndex(property.PropertyID());
CHECK_GE(index, 0);
return presentation_attribute_map_->PropertyAt(static_cast<unsigned>(index))
.Value();
}
String SvgPropertyValue(const QualifiedName& attribute_name) const {
return svg_attribute_map_.at(&attribute_name);
}
PropertyHandleSet Properties() const override;
bool HasCssProperty() const;
void AddKeyframePropertiesToV8Object(V8ObjectBuilder&,
Element*) const override;
Keyframe* Clone() const override;
void Trace(Visitor*) override;
class CSSPropertySpecificKeyframe
: public Keyframe::PropertySpecificKeyframe {
public:
CSSPropertySpecificKeyframe(double offset,
scoped_refptr<TimingFunction> easing,
const CSSValue* value,
EffectModel::CompositeOperation composite)
: Keyframe::PropertySpecificKeyframe(offset,
std::move(easing),
composite),
value_(value) {}
const CSSValue* Value() const { return value_.Get(); }
bool PopulateCompositorKeyframeValue(
const PropertyHandle&,
Element&,
const ComputedStyle& base_style,
const ComputedStyle* parent_style) const final;
const CompositorKeyframeValue* GetCompositorKeyframeValue() const final {
return compositor_keyframe_value_cache_;
}
bool IsNeutral() const final { return !value_; }
bool IsRevert() const final;
Keyframe::PropertySpecificKeyframe* NeutralKeyframe(
double offset,
scoped_refptr<TimingFunction> easing) const final;
void Trace(Visitor*) override;
private:
Keyframe::PropertySpecificKeyframe* CloneWithOffset(
double offset) const override;
bool IsCSSPropertySpecificKeyframe() const override { return true; }
Member<const CSSValue> value_;
mutable Member<CompositorKeyframeValue> compositor_keyframe_value_cache_;
};
class SVGPropertySpecificKeyframe
: public Keyframe::PropertySpecificKeyframe {
public:
SVGPropertySpecificKeyframe(double offset,
scoped_refptr<TimingFunction> easing,
const String& value,
EffectModel::CompositeOperation composite)
: Keyframe::PropertySpecificKeyframe(offset,
std::move(easing),
composite),
value_(value) {}
const String& Value() const { return value_; }
PropertySpecificKeyframe* CloneWithOffset(double offset) const final;
const CompositorKeyframeValue* GetCompositorKeyframeValue() const final {
return nullptr;
}
bool IsNeutral() const final { return value_.IsNull(); }
bool IsRevert() const final { return false; }
PropertySpecificKeyframe* NeutralKeyframe(
double offset,
scoped_refptr<TimingFunction> easing) const final;
private:
bool IsSVGPropertySpecificKeyframe() const override { return true; }
String value_;
};
private:
Keyframe::PropertySpecificKeyframe* CreatePropertySpecificKeyframe(
const PropertyHandle&,
EffectModel::CompositeOperation effect_composite,
double offset) const override;
bool IsStringKeyframe() const override { return true; }
// The unresolved property and their values. This is needed for correct
// implementation of KeyframeEffect.getKeyframes(). We use a single list for
// CSS, SVG properties. The only requirement for a property value to be
// in this list is that it parses correctly.
//
// See: https://drafts.csswg.org/web-animations/#keyframes-section
HeapHashMap<PropertyHandle, Member<const CSSValue>> input_properties_;
// The resolved properties are computed from unresolved ones applying these
// steps:
// 1. Resolve conflicts when multiple properties map to same underlying
// one (e.g., margin, margin-top)
// 2. Expand shorthands to longhands
// 3. Expand logical properties to physical ones
//
// See:
// https://drafts.csswg.org/web-animations/#calculating-computed-keyframes
//
// TODO(816956): AFAICT we don't do (1) at the moment rather we parse and feed
// values into the MutableCSSPropertyValueSet which keeps replacing values as
// they come in. I am not sure if it leads to the same conflict resolution
// that web-animation expects. This needs more investigation.
Member<MutableCSSPropertyValueSet> css_property_map_;
Member<MutableCSSPropertyValueSet> presentation_attribute_map_;
HashMap<const QualifiedName*, String> svg_attribute_map_;
};
using CSSPropertySpecificKeyframe = StringKeyframe::CSSPropertySpecificKeyframe;
using SVGPropertySpecificKeyframe = StringKeyframe::SVGPropertySpecificKeyframe;
template <>
struct DowncastTraits<StringKeyframe> {
static bool AllowFrom(const Keyframe& value) {
return value.IsStringKeyframe();
}
};
template <>
struct DowncastTraits<CSSPropertySpecificKeyframe> {
static bool AllowFrom(const Keyframe::PropertySpecificKeyframe& value) {
return value.IsCSSPropertySpecificKeyframe();
}
};
template <>
struct DowncastTraits<SVGPropertySpecificKeyframe> {
static bool AllowFrom(const Keyframe::PropertySpecificKeyframe& value) {
return value.IsSVGPropertySpecificKeyframe();
}
};
} // namespace blink
#endif
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