| // 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_ |