stylesheet.h

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#ifndef LH_STYLESHEET_H
#define LH_STYLESHEET_H
 
#include "style.h"
#include "css_selector.h"
#include "css_tokenizer.h"
 
namespace litehtml
{
 
// https://www.w3.org/TR/cssom-1/#css-declarations
struct raw_declaration
{
    using vector = std::vector<raw_declaration>;
 
    string name; // property name
    css_token_vector value = {}; // default value is specified here to get rid of gcc warning "missing initializer for member"
    bool important = false;
 
    operator bool() const { return name != ""; }
};
 
// intermediate half-parsed rule that is used internally by the parser
class raw_rule
{
public:
    using ptr = shared_ptr<raw_rule>;
    using vector = std::vector<ptr>;
 
    enum rule_type { qualified, at };
    
    raw_rule(rule_type type, string name = "") : type(type), name(name) {}
 
    rule_type type;
    // An at-rule has a name, a prelude consisting of a list of component values, and an optional block consisting of a simple {} block.
    string name;
    // https://www.w3.org/TR/css-syntax-3/#qualified-rule
    // A qualified rule has a prelude consisting of a list of component values, and a block consisting of a simple {} block.
    // Note: Most qualified rules will be style rules, where the prelude is a selector and the block a list of declarations.
    css_token_vector prelude;
    css_token block;
};
 
class css
{
    css_selector::vector    m_selectors;
public:
 
    const css_selector::vector& selectors() const
    {
        return m_selectors;
    }
 
    template<class Input>
    void    parse_css_stylesheet(const Input& input, string baseurl, shared_ptr<document> doc, media_query_list_list::ptr media = nullptr, bool top_level = true);
 
    void    sort_selectors();
 
private:
    bool    parse_style_rule(raw_rule::ptr rule, string baseurl, shared_ptr<document> doc, media_query_list_list::ptr media);
    void    parse_import_rule(raw_rule::ptr rule, string baseurl, shared_ptr<document> doc, media_query_list_list::ptr media);
    void    add_selector(const css_selector::ptr& selector);
};
 
inline void css::add_selector(const css_selector::ptr& selector)
{
    selector->m_order = (int)m_selectors.size();
    m_selectors.push_back(selector);
}
 
 
} // namespace litehtml
 
#endif  // LH_STYLESHEET_H