79 lines
1.8 KiB
C++
79 lines
1.8 KiB
C++
#ifndef NANA_UNICODE_BIDI_HPP
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#define NANA_UNICODE_BIDI_HPP
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#include <vector>
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#include <nana/push_ignore_diagnostic>
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namespace nana
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{
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class unicode_bidi
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{
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public:
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typedef wchar_t char_type;
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enum class directional_override_status
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{
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neutral, right_to_left, left_to_right
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};
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enum class bidi_char
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{
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L, LRE, LRO, R, AL, RLE, RLO,
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PDF = 0x1000, EN, ES, ET, AN, CS, NSM, BN,
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B = 0x2000, S, WS, ON
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};
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enum class bidi_category
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{
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strong, weak = 0x1000, neutral = 0x2000
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};
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const static char_type LRE = 0x202A;
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const static char_type RLE = 0x202B;
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const static char_type PDF = 0x202C;
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const static char_type LRO = 0x202D;
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const static char_type RLO = 0x202E;
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const static char_type LRM = 0x200E;
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const static char_type RLM = 0x200F;
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struct remember
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{
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unsigned level;
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directional_override_status directional_override;
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};
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struct entity
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{
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const wchar_t * begin, * end;
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bidi_char bidi_char_type;
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unsigned level;
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};
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void linestr(const char_type*, std::size_t len, std::vector<entity> & reordered);
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private:
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static unsigned _m_paragraph_level(const char_type * begin, const char_type * end);
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void _m_push_entity(const char_type * begin, const char_type *end, unsigned level, bidi_char);
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std::vector<entity>::iterator _m_search_first_character();
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bidi_char _m_eor(std::vector<entity>::iterator);
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void _m_resolve_weak_types();
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void _m_resolve_neutral_types();
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void _m_resolve_implicit_levels();
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void _m_reordering_resolved_levels(std::vector<entity> & reordered);
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static bidi_category _m_bidi_category(bidi_char);
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static bidi_char _m_char_dir(char_type);
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private:
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void _m_output_levels() const;
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void _m_output_bidi_char() const;
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private:
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std::vector<entity> levels_;
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};
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}
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#include <nana/pop_ignore_diagnostic>
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#endif
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