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// Copyright 2015 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef COBALT_CSSOM_LIST_VALUE_H_
#define COBALT_CSSOM_LIST_VALUE_H_
#include <memory>
#include <vector>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "cobalt/cssom/property_value.h"
#include "cobalt/cssom/property_value_visitor.h"
namespace cobalt {
namespace cssom {
// This class is used to represent a CSS property value that is a list
// of concrete objects. The list can be constructed with a ListValue::Builder
// object and after that is immutable. List elements must have operator==()
// defined on them. For lists of heap-allocated polymorphic data types, please
// see ScopedListValue instead.
template <typename T>
class ListValue : public PropertyValue {
public:
typedef std::vector<T> Builder;
explicit ListValue(std::unique_ptr<Builder> value)
: value_(std::move(value)) {
DCHECK(value_.get());
DCHECK(!value_->empty());
}
const T& get_item_modulo_size(int index) const {
return (*value_)[index % value_->size()];
}
const Builder& value() const { return *value_; }
bool operator==(const ListValue<T>& other) const {
return *value_ == *other.value_;
}
protected:
~ListValue() override {}
const std::unique_ptr<Builder> value_;
private:
DISALLOW_COPY_AND_ASSIGN(ListValue<T>);
};
} // namespace cssom
} // namespace cobalt
#endif // COBALT_CSSOM_LIST_VALUE_H_