mirror of
https://github.com/pjh456/OxideJS.git
synced 2026-10-24 02:31:13 +08:00
529 lines
15 KiB
Rust
529 lines
15 KiB
Rust
//! String locale 三方法：toLocaleLowerCase / toLocaleUpperCase / localeCompare。
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//!
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//! toLocaleLowerCase 与 toLowerCase 同映射表，增量仅 Final Sigma 条件映射
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//! （σ/ς 判定按原始单元序列、双向跳过 Mn/Cf 找最近可见字符）；
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//! toLocaleUpperCase 与 toUpperCase 同表无条件映射；localeCompare 基本档 =
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//! NFC 归一后 UTF-16 单元序比较，第二参缺省/undefined 落 "undefined" 串。
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use std::cmp::Ordering;
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use oxide_runtime_api::{NativeResult, VmHost};
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use oxide_types::value::JsValue;
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use crate::builtins_debug;
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use super::common::try_string;
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use super::{as_units, map_well_formed_segments, this_units};
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// ── Mn/Cf 判定表 ─────────────────────────────────────────────────────────
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//
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// Final Sigma 条件映射的"不可见"判定：Mn（非连接修饰符号）与 Cf（格式字符）
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// 全集范围表（UCD 快照，367 段，起点升序）。表取全集而非语料钉点，防语料
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// 扩充翻车；仅当未来 Unicode 版本新增 Mn/Cf 码点且语料随之扩充时需重生成。
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const MN_CF_RANGES: &[(u32, u32)] = &[
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(0xad, 0xad),
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(0x300, 0x36f),
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(0x483, 0x487),
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(0x591, 0x5bd),
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(0x5bf, 0x5bf),
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(0x5c1, 0x5c2),
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(0x5c4, 0x5c5),
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(0x5c7, 0x5c7),
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(0x600, 0x605),
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(0x610, 0x61a),
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(0x61c, 0x61c),
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(0x64b, 0x65f),
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(0x670, 0x670),
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(0x6d6, 0x6dc),
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(0x6dd, 0x6dd),
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(0x6df, 0x6e4),
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(0x6e7, 0x6e8),
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(0x6ea, 0x6ed),
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(0x70f, 0x70f),
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(0x711, 0x711),
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(0x730, 0x74a),
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(0x7a6, 0x7b0),
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(0x7eb, 0x7f3),
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(0x7fd, 0x7fd),
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(0x816, 0x819),
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(0x81b, 0x823),
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(0x825, 0x827),
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(0x829, 0x82d),
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(0x859, 0x85b),
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(0x890, 0x891),
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(0x898, 0x89f),
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(0x8ca, 0x8e1),
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(0x8e2, 0x8e2),
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(0x8e3, 0x902),
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(0x93a, 0x93a),
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(0x93c, 0x93c),
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(0x941, 0x948),
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(0x94d, 0x94d),
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(0x951, 0x957),
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(0x962, 0x963),
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(0x981, 0x981),
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(0x9bc, 0x9bc),
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(0x9c1, 0x9c4),
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(0x9cd, 0x9cd),
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(0x9e2, 0x9e3),
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(0x9fe, 0x9fe),
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(0xa01, 0xa02),
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(0xa3c, 0xa3c),
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(0xa41, 0xa42),
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(0xa47, 0xa48),
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(0xa4b, 0xa4d),
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(0xa51, 0xa51),
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(0xa70, 0xa71),
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(0xa75, 0xa75),
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(0xa81, 0xa82),
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(0xabc, 0xabc),
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(0xac1, 0xac5),
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(0xac7, 0xac8),
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(0xacd, 0xacd),
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(0xae2, 0xae3),
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(0xafa, 0xaff),
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(0xb01, 0xb01),
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(0xb3c, 0xb3c),
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(0xb3f, 0xb3f),
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(0xb41, 0xb44),
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(0xb4d, 0xb4d),
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(0xb55, 0xb56),
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(0xb62, 0xb63),
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(0xb82, 0xb82),
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(0xbc0, 0xbc0),
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(0xbcd, 0xbcd),
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(0xc00, 0xc00),
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(0xc04, 0xc04),
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(0xc3c, 0xc3c),
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(0xc3e, 0xc40),
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(0xc46, 0xc48),
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(0xc4a, 0xc4d),
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(0xc55, 0xc56),
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(0xc62, 0xc63),
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(0xc81, 0xc81),
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(0xcbc, 0xcbc),
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(0xcbf, 0xcbf),
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(0xcc6, 0xcc6),
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(0xccc, 0xccd),
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(0xce2, 0xce3),
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(0xd00, 0xd01),
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(0xd3b, 0xd3c),
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(0xd41, 0xd44),
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(0xd4d, 0xd4d),
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(0xd62, 0xd63),
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(0xd81, 0xd81),
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(0xdca, 0xdca),
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(0xdd2, 0xdd4),
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(0xdd6, 0xdd6),
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(0xe31, 0xe31),
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(0xe34, 0xe3a),
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(0xe47, 0xe4e),
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(0xeb1, 0xeb1),
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(0xeb4, 0xebc),
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(0xec8, 0xece),
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(0xf18, 0xf19),
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(0xf35, 0xf35),
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(0xf37, 0xf37),
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(0xf39, 0xf39),
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(0xf71, 0xf7e),
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(0xf80, 0xf84),
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(0xf86, 0xf87),
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(0xf8d, 0xf97),
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(0xf99, 0xfbc),
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(0xfc6, 0xfc6),
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(0x102d, 0x1030),
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(0x1032, 0x1037),
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(0x1039, 0x103a),
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(0x103d, 0x103e),
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(0x1058, 0x1059),
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(0x105e, 0x1060),
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(0x1071, 0x1074),
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(0x1082, 0x1082),
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(0x1085, 0x1086),
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(0x108d, 0x108d),
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(0x109d, 0x109d),
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(0x135d, 0x135f),
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(0x1712, 0x1714),
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(0x1732, 0x1733),
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(0x1752, 0x1753),
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(0x1772, 0x1773),
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(0x17b4, 0x17b5),
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(0x17b7, 0x17bd),
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(0x17c6, 0x17c6),
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(0x17c9, 0x17d3),
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(0x17dd, 0x17dd),
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(0x180b, 0x180d),
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(0x180e, 0x180e),
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(0x180f, 0x180f),
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(0x1885, 0x1886),
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(0x18a9, 0x18a9),
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(0x1920, 0x1922),
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(0x1927, 0x1928),
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(0x1932, 0x1932),
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(0x1939, 0x193b),
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(0x1a17, 0x1a18),
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(0x1a1b, 0x1a1b),
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(0x1a56, 0x1a56),
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(0x1a58, 0x1a5e),
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(0x1a60, 0x1a60),
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(0x1a62, 0x1a62),
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(0x1a65, 0x1a6c),
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(0x1a73, 0x1a7c),
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(0x1a7f, 0x1a7f),
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(0x1ab0, 0x1abd),
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(0x1abf, 0x1ace),
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(0x1b00, 0x1b03),
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(0x1b34, 0x1b34),
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(0x1b36, 0x1b3a),
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(0x1b3c, 0x1b3c),
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(0x1b42, 0x1b42),
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(0x1b6b, 0x1b73),
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(0x1b80, 0x1b81),
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(0x1ba2, 0x1ba5),
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(0x1ba8, 0x1ba9),
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(0x1bab, 0x1bad),
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(0x1be6, 0x1be6),
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(0x1be8, 0x1be9),
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(0x1bed, 0x1bed),
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(0x1bef, 0x1bf1),
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(0x1c2c, 0x1c33),
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(0x1c36, 0x1c37),
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(0x1cd0, 0x1cd2),
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(0x1cd4, 0x1ce0),
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(0x1ce2, 0x1ce8),
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(0x1ced, 0x1ced),
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(0x1cf4, 0x1cf4),
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(0x1cf8, 0x1cf9),
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(0x1dc0, 0x1dff),
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(0x200b, 0x200f),
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(0x202a, 0x202e),
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(0x2060, 0x2064),
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(0x2066, 0x206f),
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(0x20d0, 0x20dc),
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(0x20e1, 0x20e1),
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(0x20e5, 0x20f0),
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(0x2cef, 0x2cf1),
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(0x2d7f, 0x2d7f),
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(0x2de0, 0x2dff),
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(0x302a, 0x302d),
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(0x3099, 0x309a),
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(0xa66f, 0xa66f),
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(0xa674, 0xa67d),
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(0xa69e, 0xa69f),
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(0xa6f0, 0xa6f1),
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(0xa802, 0xa802),
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(0xa806, 0xa806),
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(0xa80b, 0xa80b),
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(0xa825, 0xa826),
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(0xa82c, 0xa82c),
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(0xa8c4, 0xa8c5),
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(0xa8e0, 0xa8f1),
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(0xa8ff, 0xa8ff),
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(0xa926, 0xa92d),
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(0xa947, 0xa951),
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(0xa980, 0xa982),
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(0xa9b3, 0xa9b3),
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(0xa9b6, 0xa9b9),
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(0xa9bc, 0xa9bd),
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(0xa9e5, 0xa9e5),
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(0xaa29, 0xaa2e),
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(0xaa31, 0xaa32),
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(0xaa35, 0xaa36),
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(0xaa43, 0xaa43),
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(0xaa4c, 0xaa4c),
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(0xaa7c, 0xaa7c),
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(0xaab0, 0xaab0),
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(0xaab2, 0xaab4),
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(0xaab7, 0xaab8),
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(0xaabe, 0xaabf),
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(0xaac1, 0xaac1),
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(0xaaec, 0xaaed),
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(0xaaf6, 0xaaf6),
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(0xabe5, 0xabe5),
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(0xabe8, 0xabe8),
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(0xabed, 0xabed),
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(0xfb1e, 0xfb1e),
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(0xfe00, 0xfe0f),
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(0xfe20, 0xfe2f),
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(0xfeff, 0xfeff),
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(0xfff9, 0xfffb),
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(0x101fd, 0x101fd),
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(0x102e0, 0x102e0),
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(0x10376, 0x1037a),
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(0x10a01, 0x10a03),
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(0x10a05, 0x10a06),
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(0x10a0c, 0x10a0f),
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(0x10a38, 0x10a3a),
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(0x10a3f, 0x10a3f),
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(0x10ae5, 0x10ae6),
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(0x10d24, 0x10d27),
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(0x10eab, 0x10eac),
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(0x10efd, 0x10eff),
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(0x10f46, 0x10f50),
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(0x10f82, 0x10f85),
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(0x11001, 0x11001),
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(0x11038, 0x11046),
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(0x11070, 0x11070),
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(0x11073, 0x11074),
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(0x1107f, 0x11081),
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(0x110b3, 0x110b6),
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(0x110b9, 0x110ba),
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(0x110bd, 0x110bd),
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(0x110c2, 0x110c2),
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(0x110cd, 0x110cd),
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(0x11100, 0x11102),
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(0x11127, 0x1112b),
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(0x1112d, 0x11134),
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(0x11173, 0x11173),
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(0x11180, 0x11181),
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(0x111b6, 0x111be),
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(0x111c9, 0x111cc),
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(0x111cf, 0x111cf),
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(0x1122f, 0x11231),
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(0x11234, 0x11234),
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(0x11236, 0x11237),
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(0x1123e, 0x1123e),
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(0x11241, 0x11241),
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(0x112df, 0x112df),
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(0x112e3, 0x112ea),
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(0x11300, 0x11301),
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(0x1133b, 0x1133c),
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(0x11340, 0x11340),
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(0x11366, 0x1136c),
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(0x11370, 0x11374),
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(0x11438, 0x1143f),
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(0x11442, 0x11444),
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(0x11446, 0x11446),
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(0x1145e, 0x1145e),
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(0x114b3, 0x114b8),
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(0x114ba, 0x114ba),
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(0x114bf, 0x114c0),
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(0x114c2, 0x114c3),
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(0x115b2, 0x115b5),
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(0x115bc, 0x115bd),
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(0x115bf, 0x115c0),
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(0x115dc, 0x115dd),
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(0x11633, 0x1163a),
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(0x1163d, 0x1163d),
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(0x1163f, 0x11640),
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(0x116ab, 0x116ab),
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(0x116ad, 0x116ad),
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(0x116b0, 0x116b5),
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(0x116b7, 0x116b7),
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(0x1171d, 0x1171f),
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(0x11722, 0x11725),
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(0x11727, 0x1172b),
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(0x1182f, 0x11837),
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(0x11839, 0x1183a),
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(0x1193b, 0x1193c),
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(0x1193e, 0x1193e),
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(0x11943, 0x11943),
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(0x119d4, 0x119d7),
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(0x119da, 0x119db),
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(0x119e0, 0x119e0),
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(0x11a01, 0x11a0a),
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(0x11a33, 0x11a38),
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(0x11a3b, 0x11a3e),
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(0x11a47, 0x11a47),
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(0x11a51, 0x11a56),
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(0x11a59, 0x11a5b),
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(0x11a8a, 0x11a96),
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(0x11a98, 0x11a99),
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(0x11c30, 0x11c36),
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(0x11c38, 0x11c3d),
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(0x11c3f, 0x11c3f),
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(0x11c92, 0x11ca7),
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(0x11caa, 0x11cb0),
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(0x11cb2, 0x11cb3),
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(0x11cb5, 0x11cb6),
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(0x11d31, 0x11d36),
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(0x11d3a, 0x11d3a),
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(0x11d3c, 0x11d3d),
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(0x11d3f, 0x11d45),
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(0x11d47, 0x11d47),
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(0x11d90, 0x11d91),
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(0x11d95, 0x11d95),
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(0x11d97, 0x11d97),
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(0x11ef3, 0x11ef4),
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(0x11f00, 0x11f01),
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(0x11f36, 0x11f3a),
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(0x11f40, 0x11f40),
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(0x11f42, 0x11f42),
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(0x13430, 0x1343f),
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(0x13440, 0x13440),
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(0x13447, 0x13455),
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(0x16af0, 0x16af4),
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(0x16b30, 0x16b36),
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(0x16f4f, 0x16f4f),
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(0x16f8f, 0x16f92),
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(0x16fe4, 0x16fe4),
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(0x1bc9d, 0x1bc9e),
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(0x1bca0, 0x1bca3),
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(0x1cf00, 0x1cf2d),
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(0x1cf30, 0x1cf46),
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(0x1d167, 0x1d169),
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(0x1d173, 0x1d17a),
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(0x1d17b, 0x1d182),
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(0x1d185, 0x1d18b),
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(0x1d1aa, 0x1d1ad),
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(0x1d242, 0x1d244),
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(0x1da00, 0x1da36),
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(0x1da3b, 0x1da6c),
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(0x1da75, 0x1da75),
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(0x1da84, 0x1da84),
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(0x1da9b, 0x1da9f),
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(0x1daa1, 0x1daaf),
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(0x1e000, 0x1e006),
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(0x1e008, 0x1e018),
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(0x1e01b, 0x1e021),
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(0x1e023, 0x1e024),
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(0x1e026, 0x1e02a),
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(0x1e08f, 0x1e08f),
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(0x1e130, 0x1e136),
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(0x1e2ae, 0x1e2ae),
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(0x1e2ec, 0x1e2ef),
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(0x1e4ec, 0x1e4ef),
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(0x1e8d0, 0x1e8d6),
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(0x1e944, 0x1e94a),
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(0xe0001, 0xe0001),
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(0xe0020, 0xe007f),
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(0xe0100, 0xe01ef),
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];
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/// 码点是否属 Mn/Cf（范围表二分判定，起点升序）。
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fn is_mn_cf(cp: u32) -> bool {
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let idx = MN_CF_RANGES.partition_point(|&(lo, _)| lo <= cp);
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idx > 0 && cp <= MN_CF_RANGES[idx - 1].1
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}
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// ── Final Sigma 条件映射 ──────────────────────────────────────────────────
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/// Final Sigma 条件小写映射：逐码点小写，其中 U+03A3（Σ）按条件规则取 σ/ς。
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///
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/// σ/ς 判定按原始单元序列（非变换后）：后向（索引升方向）跳过 Mn/Cf 单元
|
||
/// 存在可见字符 → σ；后向无且前向（索引降方向）跳过 Mn/Cf 存在可见字符 → ς；
|
||
/// 前后均无可见字符 → σ。孤立 surrogate 原样透传（与 toLowerCase 同口径）。
|
||
fn final_sigma_lower(units: &[u16]) -> Vec<u16> {
|
||
let mut out = Vec::with_capacity(units.len());
|
||
let mut i = 0;
|
||
while i < units.len() {
|
||
let u = units[i];
|
||
if u == 0x03A3 {
|
||
// 双向跳过 Mn/Cf 找最近可见字符（含行尾前的任意非 Mn/Cf 字符）。
|
||
let mut j = i + 1;
|
||
while j < units.len() && is_mn_cf(units[j] as u32) {
|
||
j += 1;
|
||
}
|
||
let after_visible = j < units.len();
|
||
let mut j = i;
|
||
while j > 0 && is_mn_cf(units[j - 1] as u32) {
|
||
j -= 1;
|
||
}
|
||
let before_visible = j > 0;
|
||
out.push(if after_visible || !before_visible { 0x03C3 } else { 0x03C2 });
|
||
i += 1;
|
||
continue;
|
||
}
|
||
if (0xD800..=0xDBFF).contains(&u) && i + 1 < units.len() && (0xDC00..=0xDFFF).contains(&units[i + 1]) {
|
||
// 代理对整体解码为码点小写后回写 UTF-16。
|
||
let cp = (((u as u32) - 0xD800) << 10 | (units[i + 1] as u32 - 0xDC00)) + 0x10000;
|
||
if let Some(c) = char::from_u32(cp) {
|
||
out.extend(c.to_lowercase().collect::<String>().encode_utf16());
|
||
}
|
||
i += 2;
|
||
continue;
|
||
}
|
||
if (0xD800..=0xDFFF).contains(&u) {
|
||
out.push(u);
|
||
} else if let Some(c) = char::from_u32(u as u32) {
|
||
out.extend(c.to_lowercase().collect::<String>().encode_utf16());
|
||
}
|
||
i += 1;
|
||
}
|
||
out
|
||
}
|
||
|
||
// ── 三方法 ───────────────────────────────────────────────────────────────
|
||
|
||
/// `String.prototype.toLocaleLowerCase`：locale 无关小写（与 toLowerCase 同表，
|
||
/// 增量 Final Sigma 条件映射）。
|
||
pub fn string_to_locale_lower_case<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
|
||
builtins_debug!("String.prototype.toLocaleLowerCase called with {} args", args.len());
|
||
let s = try_string!(this_units(vm, args)).into_owned();
|
||
let out = final_sigma_lower(&s);
|
||
NativeResult::Ok(vm.new_string_units_owned(out))
|
||
}
|
||
|
||
/// `String.prototype.toLocaleUpperCase`：locale 无关大写（与 toUpperCase 同表，
|
||
/// 良形段映射，孤立 surrogate 单元原样保留）。
|
||
pub fn string_to_locale_upper_case<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
|
||
builtins_debug!("String.prototype.toLocaleUpperCase called with {} args", args.len());
|
||
let s = try_string!(this_units(vm, args));
|
||
let out = map_well_formed_segments(&s, |seg| seg.to_uppercase());
|
||
NativeResult::Ok(vm.new_string_units_owned(out))
|
||
}
|
||
|
||
/// `String.prototype.localeCompare(compareString)`：基本档比较——两侧 NFC 归一后
|
||
/// 按 UTF-16 单元序（良形文本下与码元序等价）返回 -1/0/1。
|
||
///
|
||
/// # 边界与前提
|
||
/// - 第二参缺省或 undefined 落 "undefined" 串（规范基本档允许）；其余非字符串经
|
||
/// 完整 ToString，Symbol 抛 TypeError；this 的 null/undefined/symbol 经
|
||
/// this_units 抛 TypeError。
|
||
///
|
||
/// # 注意事项
|
||
/// - 非 NFC 等价但 UCA 可分的串按单元序判（如 "ö" vs "o"），属基本档固有边界。
|
||
pub fn string_locale_compare<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
|
||
builtins_debug!("String.prototype.localeCompare called with {} args", args.len());
|
||
use unicode_normalization::UnicodeNormalization;
|
||
let a = try_string!(this_units(vm, args)).into_owned();
|
||
let b = if args.len() > 1 && !vm.reg(args[1]).is_undefined() {
|
||
try_string!(as_units(vm, vm.reg(args[1]))).into_owned()
|
||
} else {
|
||
"undefined".encode_utf16().collect()
|
||
};
|
||
// NFC 归一（良形段映射，孤立 surrogate 透传，与 normalize 同路径）。
|
||
let a = map_well_formed_segments(&a, |seg| seg.nfc().collect());
|
||
let b = map_well_formed_segments(&b, |seg| seg.nfc().collect());
|
||
NativeResult::Ok(JsValue::int(match a.cmp(&b) {
|
||
Ordering::Less => -1,
|
||
Ordering::Equal => 0,
|
||
Ordering::Greater => 1,
|
||
}))
|
||
}
|
||
|
||
#[cfg(test)]
|
||
mod tests {
|
||
use super::*;
|
||
|
||
#[test]
|
||
fn mn_cf_table_corpus_points() {
|
||
// 语料钉死码点：Cf/Mn 在表、Lu 不属表。
|
||
assert!(is_mn_cf(0x00AD));
|
||
assert!(is_mn_cf(0x0345));
|
||
assert!(is_mn_cf(0x180E));
|
||
assert!(is_mn_cf(0x1D242));
|
||
assert!(!is_mn_cf(0x1D4A2));
|
||
assert!(!is_mn_cf(0x0041));
|
||
}
|
||
|
||
#[test]
|
||
fn final_sigma_conditional_mapping() {
|
||
// （输入单元, 期望输出）：单枚/前后可见/行首行尾 Mn/Cf 环绕。
|
||
let cases: &[(&[u16], &[u16])] = &[
|
||
(&[0x03A3], &[0x03C3]),
|
||
(&[0x41, 0x03A3], &[0x61, 0x03C2]),
|
||
(&[0xD835, 0xDCA2, 0x03A3], &[0xD835, 0xDCA2, 0x03C2]),
|
||
(&[0x0345, 0x03A3], &[0x0345, 0x03C3]),
|
||
(&[0x41, 0x03A3, 0x2E], &[0x61, 0x03C3, 0x2E]),
|
||
(&[0x41, 0x03A3, 0x0345], &[0x61, 0x03C2, 0x0345]),
|
||
(&[0x41, 0x03A3, 0x180E], &[0x61, 0x03C2, 0x180E]),
|
||
(&[0x41, 0x03A3, 0x180E, 0x42], &[0x61, 0x03C3, 0x180E, 0x62]),
|
||
];
|
||
for (input, want) in cases {
|
||
assert_eq!(&final_sigma_lower(input), want);
|
||
}
|
||
}
|
||
}
|