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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/core/css/property_registry.h"
namespace blink {
void PropertyRegistry::RegisterProperty(const AtomicString& name,
PropertyRegistration& registration) {
DCHECK(!IsInRegisteredPropertySet(name));
registered_properties_.Set(name, ®istration);
registered_viewport_unit_flags_ |= registration.GetViewportUnitFlags();
version_++;
}
void PropertyRegistry::DeclareProperty(const AtomicString& name,
PropertyRegistration& registration) {
declared_properties_.Set(name, ®istration);
declared_viewport_unit_flags_ |= registration.GetViewportUnitFlags();
version_++;
}
void PropertyRegistry::RemoveDeclaredProperties() {
if (declared_properties_.empty()) {
return;
}
declared_properties_.clear();
declared_viewport_unit_flags_ = 0;
version_++;
}
void PropertyRegistry::AddRegistrationForInspector(
const AtomicString& name,
PropertyRegistration& registration) {
DCHECK(!IsInRegisteredPropertySet(name));
registered_properties_.Set(name, ®istration);
}
void PropertyRegistry::RemoveRegistrationForInspector(
const AtomicString& name) {
if (!IsInRegisteredPropertySet(name)) {
return;
}
declared_properties_.erase(name);
}
const PropertyRegistration* PropertyRegistry::Registration(
const AtomicString& name) const {
// If a property is registered with both CSS.registerProperty and @property,
// the registration from CSS.registerProperty must win.
//
// https://drafts.css-houdini.org/css-properties-values-api-1/#determining-registration
auto it = registered_properties_.find(name);
if (it != registered_properties_.end()) {
return it->value.Get();
}
it = declared_properties_.find(name);
return it != declared_properties_.end() ? it->value : nullptr;
}
bool PropertyRegistry::IsEmpty() const {
return registered_properties_.empty() && declared_properties_.empty();
}
bool PropertyRegistry::IsInRegisteredPropertySet(
const AtomicString& name) const {
return registered_properties_.Contains(name);
}
PropertyRegistry::Iterator::Iterator(
const RegistrationMap& registered_properties,
const RegistrationMap& declared_properties,
MapIterator registered_iterator,
MapIterator declared_iterator)
: registered_iterator_(registered_iterator),
declared_iterator_(declared_iterator),
registered_properties_(registered_properties),
declared_properties_(declared_properties) {}
// The iterator works by first yielding the CSS.registerProperty-registrations
// unconditionally (since nothing can override them), and then yield the
// @property-registrations that aren't masked by conflicting
// CSS.registerProperty-registrations.
void PropertyRegistry::Iterator::operator++() {
if (registered_iterator_ != registered_properties_.end()) {
++registered_iterator_;
} else {
++declared_iterator_;
}
if (registered_iterator_ == registered_properties_.end()) {
while (CurrentDeclaredIteratorIsMasked()) {
++declared_iterator_;
}
}
}
PropertyRegistry::RegistrationMap::ValueType
PropertyRegistry::Iterator::operator*() const {
if (registered_iterator_ != registered_properties_.end()) {
return *registered_iterator_;
}
return *declared_iterator_;
}
bool PropertyRegistry::Iterator::operator==(const Iterator& o) const {
return registered_iterator_ == o.registered_iterator_ &&
declared_iterator_ == o.declared_iterator_;
}
bool PropertyRegistry::Iterator::CurrentDeclaredIteratorIsMasked() {
return (declared_iterator_ != declared_properties_.end()) &&
registered_properties_.Contains(declared_iterator_->key);
}
PropertyRegistry::Iterator PropertyRegistry::begin() const {
return Iterator(registered_properties_, declared_properties_,
registered_properties_.begin(), declared_properties_.begin());
}
PropertyRegistry::Iterator PropertyRegistry::end() const {
return Iterator(registered_properties_, declared_properties_,
registered_properties_.end(), declared_properties_.end());
}
void PropertyRegistry::MarkReferenced(const AtomicString& property_name) const {
const PropertyRegistration* registration = Registration(property_name);
if (registration) {
registration->referenced_ = true;
}
}
bool PropertyRegistry::WasReferenced(const AtomicString& property_name) const {
const PropertyRegistration* registration = Registration(property_name);
if (!registration) {
return false;
}
return registration->referenced_;
}
} // namespace blink
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