Jia Suiandfanlusky
93f95d1245
* fix(engine): emoji 查询精确命中优先于前缀命中 (#988) * fix(engine): 颜文字查询同样精确命中优先于前缀命中 (#988) * fix(engine): emoji / 颜文字精确提级只认全拼，并合并为单次排序查询 - 双拼下原始码只按目录顺序参与前缀命中，不再精确提级：小鹤 xl 精确命中简拼键时会压过展开后的 xiang。 - 颜文字只有全拼精确命中提级，简拼精确命中不提级：单音节条目的简拼只有一个字母，打 k 时会整批排到前面。 - 两级查询合并为每个查询码一条 SQL（精确行在 LIMIT 之前），语句只 prepare 一次，循环抽到 local_database 的 query_ranked_entries 共用。 - server 回归测试不再断言 ku 多个精确条目之间的目录顺序。 --------- Co-authored-by: fanlusky <1730976608@qq.com>
49 lines
2.2 KiB
C++
49 lines
2.2 KiB
C++
#pragma once
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#include <sqlite3.h>
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#include <filesystem>
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#include <memory>
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#include <optional>
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#include <string>
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#include <vector>
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namespace metasequoia::local_modes
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{
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// One code looked up by query_ranked_entries(). Only lookups with exact_ranks
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// set lift a whole-key match above longer keys: under Shuangpin the raw typed
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// code is looked up too, and a raw code that happens to equal some jianpin or
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// English key must not outrank the full pinyin the user meant.
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struct RankedLookup
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{
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std::string code;
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bool exact_ranks;
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};
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// Prefix lookup shared by the emoji and kaomoji modes. `sql` is prepared once
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// and run per lookup with ?1 = code, ?2 = code + 0x7f (prefix upper bound) and
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// ?3 = limit; it must return (text, sort_order, is_exact) with exact rows
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// first, so that the per-lookup LIMIT never cuts an exact hit. The result holds
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// exact hits of ranking lookups first, then every other hit, each tier in
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// sort_order, deduplicated by text and capped at `limit`. Returns nullopt when
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// the statement cannot be prepared, bound or stepped.
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std::optional<std::vector<std::string>> query_ranked_entries(sqlite3 *database, const char *sql,
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const std::vector<RankedLookup> &lookups, int limit);
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// Opens a read-only connection for a local-mode query (jianpin, quick phrases,
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// emoji, kaomoji). Those queries run on every keystroke of their mode, and a
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// fresh connection re-parses the dictionary schema -- a couple of hundred tables
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// in msime.db -- on its first prepare. For the shipped dictionaries of the
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// active data directory the connection is therefore opened once and shared.
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// Any other path (tests, tools) gets its own connection that closes with the
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// last reference, so the file is never held open behind a caller's back.
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// Returns null when the database cannot be opened.
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std::shared_ptr<sqlite3> open_local_database(const std::filesystem::path &path);
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// Drops the shared connections so the dictionary files can be deleted or
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// replaced; each closes once the last query using it returns. Called by
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// user_dictionary::close_default_user_database(), which is what callers use to
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// let go of the data directory.
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void close_cached_local_databases();
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} // namespace metasequoia::local_modes
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