hyphenation.hpp

[詳解]

#ifndef TYPESET_TEXT_HYPHENATION_HPP
#define TYPESET_TEXT_HYPHENATION_HPP
 
#include <cstddef>
#include <cstdint>
#include <map>
#include <memory>
#include <string>
#include <unordered_map>
#include <vector>
 
namespace typeset::text {
 
class Hyphenator {
public:
    size_t addPatterns(const std::string& utf8);
 
    void addException(const std::string& utf8Word);
 
    bool empty() const { return patterns_.empty() && exceptions_.empty(); }
    size_t patternCount() const { return patterns_.size(); }
 
    std::vector<size_t> hyphenate(const std::u32string& word, int minLeft = 2, int minRight = 3) const;
 
    size_t addPatternFile(const std::string& path);
 
private:
    std::unordered_map<std::u32string, std::vector<uint8_t>> patterns_;
    std::unordered_map<std::u32string, std::vector<size_t>> exceptions_;
};
 
class HyphenationDictionary {
public:
    Hyphenator& forLanguage(const std::string& language);
    const Hyphenator* find(const std::string& language) const;
    void setDefaultLanguage(const std::string& language);
    const std::string& defaultLanguage() const { return default_; }
    bool empty() const { return byLanguage_.empty(); }
 
private:
    std::map<std::string, Hyphenator> byLanguage_;
    std::string default_;
};
 
constexpr char32_t kSoftHyphen = 0x00AD;
 
} // namespace typeset::text
 
#endif // TYPESET_TEXT_HYPHENATION_HPP