iterators.h

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#ifndef LH_ITERATORS_H
#define LH_ITERATORS_H
 
#include "types.h"
#include <list>
#include <functional>
 
namespace litehtml
{
    class render_item;
 
    class iterator_selector
    {
    public:
        virtual bool select(const std::shared_ptr<render_item>& el) = 0;
 
        protected:
        ~iterator_selector() = default;
    };
 
    enum iterator_item_type
    {
        iterator_item_type_child,
        iterator_item_type_start_parent,
        iterator_item_type_end_parent
    };
 
    class elements_iterator
    {
    private:
        iterator_selector* m_go_inside;
        iterator_selector* m_select;
        bool m_return_parent;
 
        bool go_inside(const std::shared_ptr<render_item>& el);
 
    public:
        elements_iterator(bool return_parents, iterator_selector* go_inside, iterator_selector* select);
        ~elements_iterator() = default;
 
        void process(const std::shared_ptr<render_item>& container, const std::function<void (std::shared_ptr<render_item>&, iterator_item_type)>& func);
    
    private:
        void next_idx();
    };
 
    class go_inside_inline final : public iterator_selector
    {
    public:
        bool select(const std::shared_ptr<render_item>& el) override;
    };
 
    class inline_selector final : public iterator_selector
    {
    public:
        bool select(const std::shared_ptr<render_item>& el) override;
    };
 
    class go_inside_table final : public iterator_selector
    {
    public:
        bool select(const std::shared_ptr<render_item>& el) override;
    };
 
    class table_rows_selector final : public iterator_selector
    {
    public:
        bool select(const std::shared_ptr<render_item>& el) override;
    };
 
    class table_cells_selector final : public iterator_selector
    {
    public:
        bool select(const std::shared_ptr<render_item>& el) override;
    };
}
 
#endif  // LH_ITERATORS_H