css.h

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Copyright (c) 2021, Jan Koester jan.koester@gmx.net
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      names of its contributors may be used to endorse or promote products
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#pragma once
 
#include <string>
#include <vector>
#include <map>
#include <set>
#include <memory>
 
namespace libhtmlpp {
 
    class CSSProperty {
    public:
        CSSProperty();
        CSSProperty(const std::string &name, const std::string &value);
        CSSProperty(const CSSProperty &prop);
        ~CSSProperty();
 
        CSSProperty& operator=(const CSSProperty &prop);
 
        const std::string& getName() const;
        void                setName(const std::string &name);
 
        const std::string& getValue() const;
        void                setValue(const std::string &value);
 
    private:
        std::string _Name;
        std::string _Value;
    };
 
    class CSSDeclaration {
    public:
        CSSDeclaration();
        CSSDeclaration(const CSSDeclaration &decl);
        ~CSSDeclaration();
 
        CSSDeclaration& operator=(const CSSDeclaration &decl);
 
        void addProperty(const std::string &name, const std::string &value);
        void removeProperty(const std::string &name);
 
        const CSSProperty* getProperty(const std::string &name) const;
 
        const std::vector<CSSProperty>& getProperties() const;
 
        std::string serialize() const;
 
        void parse(const std::string &input);
        void clear();
 
    private:
        std::vector<CSSProperty> _Properties;
    };
 
    class CSSRule {
    public:
        CSSRule();
        CSSRule(const std::string &selector);
        CSSRule(const CSSRule &rule);
        ~CSSRule();
 
        CSSRule& operator=(const CSSRule &rule);
 
        const std::string& getSelector() const;
        void                setSelector(const std::string &selector);
 
        CSSDeclaration&       getDeclaration();
        const CSSDeclaration& getDeclaration() const;
 
        std::string serialize(bool formatted = false) const;
 
    private:
        std::string     _Selector;
        CSSDeclaration  _Declaration;
    };
 
    class CSSStyleSheet {
    public:
        CSSStyleSheet();
        CSSStyleSheet(const CSSStyleSheet &sheet);
        ~CSSStyleSheet();
 
        CSSStyleSheet& operator=(const CSSStyleSheet &sheet);
 
        void parse(const std::string &input);
 
        void addRule(const CSSRule &rule);
        void removeRule(size_t index);
 
        const CSSRule* getRule(size_t index) const;
        size_t         getRuleCount() const;
 
        const std::vector<CSSRule>& getRules() const;
 
        std::string serialize(bool formatted = false) const;
        void clear();
 
        static CSSDeclaration parseInlineStyle(const std::string &style);
 
        static bool approximateSelectorMatch(const std::string &selector,
                                              const std::string &tag,
                                              const std::vector<std::string> &classes,
                                              const std::string &id);
 
        void collectApproximateMatches(const std::string &tag,
                                        const std::string &cssClass,
                                        const std::string &id,
                                        std::map<std::string,std::string> &props,
                                        std::string &mediaRules,
                                        std::set<std::string> &seenMediaBlocks) const;
 
    private:
        void _skipWhitespace(const std::string &input, size_t &pos) const;
        void _skipComment(const std::string &input, size_t &pos) const;
        std::vector<CSSRule> _Rules;
    };
 
    std::string resolveCSSVariables(const std::string &value,
                                     const std::map<std::string,std::string> &customProperties);
 
}