mirror of
https://github.com/RGBCube/serenity
synced 2025-07-27 15:47:45 +00:00
LibUnicode: Implement word segmentation
This commit is contained in:
Idan Horowitz
parent
58b0eed6a7
commit
a593a5c8ab
2 changed files with 153 additions and 0 deletions
|
|
@ -450,4 +450,156 @@ Vector<size_t> find_grapheme_segmentation_boundaries([[maybe_unused]] Utf16View
|
|||
#endif
|
||||
}
|
||||
|
||||
Vector<size_t> find_word_segmentation_boundaries([[maybe_unused]] Utf16View const& view)
|
||||
{
|
||||
#if ENABLE_UNICODE_DATA
|
||||
using WBP = WordBreakProperty;
|
||||
Vector<size_t> boundaries;
|
||||
|
||||
// https://www.unicode.org/reports/tr29/#Word_Boundary_Rules
|
||||
if (view.length_in_code_points() == 0)
|
||||
return boundaries;
|
||||
|
||||
auto has_any_wbp = [](u32 code_point, auto&&... properties) {
|
||||
return (code_point_has_word_break_property(code_point, properties) || ...);
|
||||
};
|
||||
|
||||
// WB1
|
||||
boundaries.append(0);
|
||||
|
||||
if (view.length_in_code_points() > 1) {
|
||||
auto it = view.begin();
|
||||
auto code_point = *it;
|
||||
u32 next_code_point;
|
||||
Optional<u32> previous_code_point;
|
||||
auto current_ri_chain = 0;
|
||||
|
||||
for (++it; it != view.end(); ++it, previous_code_point = code_point, code_point = next_code_point) {
|
||||
next_code_point = *it;
|
||||
|
||||
auto code_point_is_cr = has_any_wbp(code_point, WBP::CR);
|
||||
auto next_code_point_is_lf = has_any_wbp(next_code_point, WBP::LF);
|
||||
|
||||
// WB3
|
||||
if (code_point_is_cr && next_code_point_is_lf)
|
||||
continue;
|
||||
// WB3a, WB3b
|
||||
if (code_point_is_cr || next_code_point_is_lf || has_any_wbp(next_code_point, WBP::CR, WBP::Newline) || has_any_wbp(code_point, WBP::LF, WBP::Newline)) {
|
||||
boundaries.append(view.code_unit_offset_of(it));
|
||||
continue;
|
||||
}
|
||||
// WB3c
|
||||
if (has_any_wbp(code_point, WBP::ZWJ) && code_point_has_property(next_code_point, Property::Extended_Pictographic))
|
||||
continue;
|
||||
// WB3d
|
||||
if (has_any_wbp(code_point, WBP::WSegSpace) && has_any_wbp(next_code_point, WBP::WSegSpace))
|
||||
continue;
|
||||
|
||||
// WB4
|
||||
if (has_any_wbp(next_code_point, WBP::Format, WBP::Extend, WBP::ZWJ))
|
||||
continue;
|
||||
|
||||
auto code_point_is_hebrew_letter = has_any_wbp(code_point, WBP::Hebrew_Letter);
|
||||
auto code_point_is_ah_letter = code_point_is_hebrew_letter || has_any_wbp(code_point, WBP::ALetter);
|
||||
auto next_code_point_is_hebrew_letter = has_any_wbp(next_code_point, WBP::Hebrew_Letter);
|
||||
auto next_code_point_is_ah_letter = next_code_point_is_hebrew_letter || has_any_wbp(next_code_point, WBP::ALetter);
|
||||
|
||||
// WB5
|
||||
if (code_point_is_ah_letter && next_code_point_is_ah_letter)
|
||||
continue;
|
||||
|
||||
Optional<u32> next_next_code_point;
|
||||
if (it != view.end()) {
|
||||
auto it_copy = it;
|
||||
++it_copy;
|
||||
if (it_copy != view.end())
|
||||
next_next_code_point = *it;
|
||||
}
|
||||
bool next_next_code_point_is_hebrew_letter = next_next_code_point.has_value() && has_any_wbp(*next_next_code_point, WBP::Hebrew_Letter);
|
||||
bool next_next_code_point_is_ah_letter = next_next_code_point_is_hebrew_letter || (next_next_code_point.has_value() && has_any_wbp(*next_next_code_point, WBP::ALetter));
|
||||
|
||||
auto next_code_point_is_mid_num_let_q = has_any_wbp(next_code_point, WBP::MidNumLet, WBP::Single_Quote);
|
||||
|
||||
// WB6
|
||||
if (code_point_is_ah_letter && next_next_code_point_is_ah_letter && (next_code_point_is_mid_num_let_q || has_any_wbp(next_code_point, WBP::MidLetter)))
|
||||
continue;
|
||||
|
||||
auto code_point_is_mid_num_let_q = has_any_wbp(code_point, WBP::MidNumLet, WBP::Single_Quote);
|
||||
auto previous_code_point_is_hebrew_letter = previous_code_point.has_value() && has_any_wbp(*previous_code_point, WBP::Hebrew_Letter);
|
||||
auto previous_code_point_is_ah_letter = previous_code_point_is_hebrew_letter || (previous_code_point.has_value() && has_any_wbp(*previous_code_point, WBP::ALetter));
|
||||
|
||||
// WB7
|
||||
if (previous_code_point_is_ah_letter && next_code_point_is_ah_letter && (code_point_is_mid_num_let_q || has_any_wbp(code_point, WBP::MidLetter)))
|
||||
continue;
|
||||
// WB7a
|
||||
if (code_point_is_hebrew_letter && has_any_wbp(next_code_point, WBP::Single_Quote))
|
||||
continue;
|
||||
// WB7b
|
||||
if (code_point_is_hebrew_letter && next_next_code_point_is_hebrew_letter && has_any_wbp(next_code_point, WBP::Double_Quote))
|
||||
continue;
|
||||
// WB7c
|
||||
if (previous_code_point_is_hebrew_letter && next_code_point_is_hebrew_letter && has_any_wbp(code_point, WBP::Double_Quote))
|
||||
continue;
|
||||
|
||||
auto code_point_is_numeric = has_any_wbp(code_point, WBP::Numeric);
|
||||
auto next_code_point_is_numeric = has_any_wbp(next_code_point, WBP::Numeric);
|
||||
|
||||
// WB8
|
||||
if (code_point_is_numeric && next_code_point_is_numeric)
|
||||
continue;
|
||||
// WB9
|
||||
if (code_point_is_ah_letter && next_code_point_is_numeric)
|
||||
continue;
|
||||
// WB10
|
||||
if (code_point_is_numeric && next_code_point_is_ah_letter)
|
||||
continue;
|
||||
|
||||
auto previous_code_point_is_numeric = previous_code_point.has_value() && has_any_wbp(code_point, WBP::Numeric);
|
||||
|
||||
// WB11
|
||||
if (previous_code_point_is_numeric && next_code_point_is_numeric && (code_point_is_mid_num_let_q || has_any_wbp(code_point, WBP::MidNum)))
|
||||
continue;
|
||||
|
||||
bool next_next_code_point_is_numeric = next_next_code_point.has_value() && has_any_wbp(*next_next_code_point, WBP::Numeric);
|
||||
|
||||
// WB12
|
||||
if (code_point_is_numeric && next_next_code_point_is_numeric && (next_code_point_is_mid_num_let_q || has_any_wbp(next_code_point, WBP::MidNum)))
|
||||
continue;
|
||||
|
||||
auto code_point_is_katakana = has_any_wbp(code_point, WBP::Katakana);
|
||||
auto next_code_point_is_katakana = has_any_wbp(next_code_point, WBP::Katakana);
|
||||
|
||||
// WB13
|
||||
if (code_point_is_katakana && next_code_point_is_katakana)
|
||||
continue;
|
||||
|
||||
auto code_point_is_extend_num_let = has_any_wbp(code_point, WBP::ExtendNumLet);
|
||||
|
||||
// WB13a
|
||||
if ((code_point_is_ah_letter || code_point_is_numeric || code_point_is_katakana || code_point_is_extend_num_let) && has_any_wbp(next_code_point, WBP::ExtendNumLet))
|
||||
continue;
|
||||
// WB13b
|
||||
if (code_point_is_extend_num_let && (next_code_point_is_ah_letter || next_code_point_is_numeric || next_code_point_is_katakana))
|
||||
continue;
|
||||
|
||||
auto code_point_is_ri = has_any_wbp(code_point, WBP::Regional_Indicator);
|
||||
current_ri_chain = code_point_is_ri ? current_ri_chain + 1 : 0;
|
||||
|
||||
// WB15, WB16
|
||||
if (code_point_is_ri && has_any_wbp(next_code_point, WBP::Regional_Indicator) && current_ri_chain % 2 == 1)
|
||||
continue;
|
||||
|
||||
// WB999
|
||||
boundaries.append(view.code_unit_offset_of(it));
|
||||
}
|
||||
}
|
||||
|
||||
// WB2
|
||||
boundaries.append(view.length_in_code_units());
|
||||
return boundaries;
|
||||
#else
|
||||
return {};
|
||||
#endif
|
||||
}
|
||||
|
||||
}
|
||||
|
|
|
|||
|
|
@ -45,5 +45,6 @@ bool code_point_has_word_break_property(u32 code_point, WordBreakProperty proper
|
|||
bool code_point_has_sentence_break_property(u32 code_point, SentenceBreakProperty property);
|
||||
|
||||
Vector<size_t> find_grapheme_segmentation_boundaries(Utf16View const&);
|
||||
Vector<size_t> find_word_segmentation_boundaries(Utf16View const&);
|
||||
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue