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/**************************************************************************/
/* fuzzy_search.h */
/**************************************************************************/
/* This file is part of: */
/* REDOT ENGINE */
/* https://redotengine.org */
/**************************************************************************/
/* Copyright (c) 2024-present Redot Engine contributors */
/* (see REDOT_AUTHORS.md) */
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#ifndef FUZZY_SEARCH_H
#define FUZZY_SEARCH_H
#include "core/variant/variant.h"
class FuzzyTokenMatch;
struct FuzzySearchToken {
int idx = -1;
String string;
bool try_exact_match(FuzzyTokenMatch &p_match, const String &p_target, int p_offset) const;
bool try_fuzzy_match(FuzzyTokenMatch &p_match, const String &p_target, int p_offset, int p_miss_budget) const;
};
class FuzzyTokenMatch {
friend struct FuzzySearchToken;
friend class FuzzySearchResult;
friend class FuzzySearch;
int matched_length = 0;
int token_length = 0;
int token_idx = -1;
Vector2i interval = Vector2i(-1, -1); // x and y are both inclusive indices.
void add_substring(int p_substring_start, int p_substring_length);
bool intersects(const Vector2i &p_other_interval) const;
bool is_case_insensitive(const String &p_original, const String &p_adjusted) const;
int get_miss_count() const { return token_length - matched_length; }
public:
int score = 0;
Vector<Vector2i> substrings; // x is start index, y is length.
};
class FuzzySearchResult {
friend class FuzzySearch;
int miss_budget = 0;
Vector2i match_interval = Vector2i(-1, -1);
bool can_add_token_match(const FuzzyTokenMatch &p_match) const;
void score_token_match(FuzzyTokenMatch &p_match, bool p_case_insensitive) const;
void add_token_match(const FuzzyTokenMatch &p_match);
void maybe_apply_score_bonus();
public:
String target;
int score = 0;
int dir_index = -1;
Vector<FuzzyTokenMatch> token_matches;
};
class FuzzySearch {
Vector<FuzzySearchToken> tokens;
void sort_and_filter(Vector<FuzzySearchResult> &p_results) const;
public:
int start_offset = 0;
bool case_sensitive = false;
int max_results = 100;
int max_misses = 2;
bool allow_subsequences = true;
void set_query(const String &p_query);
bool search(const String &p_target, FuzzySearchResult &p_result) const;
void search_all(const PackedStringArray &p_targets, Vector<FuzzySearchResult> &p_results) const;
};
#endif // FUZZY_SEARCH_H
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