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Merge #4928

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4928: Make matches consider phrases as a single `Match` r=ManyTheFish a=flevi29

# Pull Request

## Related issue
Fixes #4732

## PR checklist
Please check if your PR fulfills the following requirements:
- [x] Does this PR fix an existing issue, or have you listed the changes applied in the PR description (and why they are needed)?
- [x] Have you read the contributing guidelines?
- [x] Have you made sure that the title is accurate and descriptive of the changes?

Thank you so much for contributing to Meilisearch!


Co-authored-by: F. Levi <55688616+flevi29@users.noreply.github.com>
This commit is contained in:
meili-bors[bot] 2024-11-06 08:22:01 +00:00 committed by GitHub
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5 changed files with 444 additions and 204 deletions
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139
crates/milli/src/search/new/matches/best_match_interval.rs Normal file
View File

@ -0,0 +1,139 @@
use super::matching_words::WordId;
use super::{Match, MatchPosition};
struct MatchIntervalWithScore {
interval: [usize; 2],
score: [i16; 3],
}
// count score for phrases
fn tally_phrase_scores(fwp: &usize, lwp: &usize, order_score: &mut i16, distance_score: &mut i16) {
let words_in_phrase_minus_one = (lwp - fwp) as i16;
// will always be ordered, so +1 for each space between words
*order_score += words_in_phrase_minus_one;
// distance will always be 1, so -1 for each space between words
*distance_score -= words_in_phrase_minus_one;
}
/// Compute the score of a match interval:
/// 1) count unique matches
/// 2) calculate distance between matches
/// 3) count ordered matches
fn get_interval_score(matches: &[Match]) -> [i16; 3] {
let mut ids: Vec<WordId> = Vec::with_capacity(matches.len());
let mut order_score = 0;
let mut distance_score = 0;
let mut iter = matches.iter().peekable();
while let Some(m) = iter.next() {
if let Some(next_match) = iter.peek() {
// if matches are ordered
if next_match.ids.iter().min() > m.ids.iter().min() {
order_score += 1;
}
let m_last_word_pos = match m.position {
MatchPosition::Word { word_position, .. } => word_position,
MatchPosition::Phrase { word_positions: [fwp, lwp], .. } => {
tally_phrase_scores(&fwp, &lwp, &mut order_score, &mut distance_score);
lwp
}
};
let next_match_first_word_pos = next_match.get_first_word_pos();
// compute distance between matches
distance_score -= (next_match_first_word_pos - m_last_word_pos).min(7) as i16;
} else if let MatchPosition::Phrase { word_positions: [fwp, lwp], .. } = m.position {
// in case last match is a phrase, count score for its words
tally_phrase_scores(&fwp, &lwp, &mut order_score, &mut distance_score);
}
ids.extend(m.ids.iter());
}
ids.sort_unstable();
ids.dedup();
let uniq_score = ids.len() as i16;
// rank by unique match count, then by distance between matches, then by ordered match count.
[uniq_score, distance_score, order_score]
}
/// Returns the first and last match where the score computed by match_interval_score is the best.
pub fn find_best_match_interval(matches: &[Match], crop_size: usize) -> [&Match; 2] {
if matches.is_empty() {
panic!("`matches` should not be empty at this point");
}
// positions of the first and the last match of the best matches interval in `matches`.
let mut best_interval: Option<MatchIntervalWithScore> = None;
let mut save_best_interval = |interval_first, interval_last| {
let interval_score = get_interval_score(&matches[interval_first..=interval_last]);
let is_interval_score_better = &best_interval
.as_ref()
.map_or(true, |MatchIntervalWithScore { score, .. }| interval_score > *score);
if *is_interval_score_better {
best_interval = Some(MatchIntervalWithScore {
interval: [interval_first, interval_last],
score: interval_score,
});
}
};
// we compute the matches interval if we have at least 2 matches.
// current interval positions.
let mut interval_first = 0;
let mut interval_first_match_first_word_pos = matches[interval_first].get_first_word_pos();
for (index, next_match) in matches.iter().enumerate() {
// if next match would make interval gross more than crop_size,
// we compare the current interval with the best one,
// then we increase `interval_first` until next match can be added.
let next_match_last_word_pos = next_match.get_last_word_pos();
// if the next match would mean that we pass the crop size window,
// we take the last valid match, that didn't pass this boundry, which is `index` - 1,
// and calculate a score for it, and check if it's better than our best so far
if next_match_last_word_pos - interval_first_match_first_word_pos >= crop_size {
// if index is 0 there is no last viable match
if index != 0 {
let interval_last = index - 1;
// keep interval if it's the best
save_best_interval(interval_first, interval_last);
}
// advance start of the interval while interval is longer than crop_size.
loop {
interval_first += 1;
if interval_first == matches.len() {
interval_first -= 1;
break;
}
interval_first_match_first_word_pos = matches[interval_first].get_first_word_pos();
if interval_first_match_first_word_pos > next_match_last_word_pos
|| next_match_last_word_pos - interval_first_match_first_word_pos < crop_size
{
break;
}
}
}
}
// compute the last interval score and compare it to the best one.
let interval_last = matches.len() - 1;
// if it's the last match with itself, we need to make sure it's
// not a phrase longer than the crop window
if interval_first != interval_last || matches[interval_first].get_word_count() < crop_size {
save_best_interval(interval_first, interval_last);
}
// if none of the matches fit the criteria above, default to the first one
best_interval.map_or(
[&matches[0], &matches[0]],
|MatchIntervalWithScore { interval: [first, last], .. }| [&matches[first], &matches[last]],
)
}

62
crates/milli/src/search/new/matches/match.rs Normal file
View File

@ -0,0 +1,62 @@
use super::matching_words::WordId;
#[derive(Clone, Debug)]
pub enum MatchPosition {
Word {
// position of the word in the whole text.
word_position: usize,
// position of the token in the whole text.
token_position: usize,
},
Phrase {
// position of the first and last word in the phrase in the whole text.
word_positions: [usize; 2],
// position of the first and last token in the phrase in the whole text.
token_positions: [usize; 2],
},
}
#[derive(Clone, Debug)]
pub struct Match {
pub char_count: usize,
// ids of the query words that matches.
pub ids: Vec<WordId>,
pub position: MatchPosition,
}
impl Match {
pub(super) fn get_first_word_pos(&self) -> usize {
match self.position {
MatchPosition::Word { word_position, .. } => word_position,
MatchPosition::Phrase { word_positions: [fwp, _], .. } => fwp,
}
}
pub(super) fn get_last_word_pos(&self) -> usize {
match self.position {
MatchPosition::Word { word_position, .. } => word_position,
MatchPosition::Phrase { word_positions: [_, lwp], .. } => lwp,
}
}
pub(super) fn get_first_token_pos(&self) -> usize {
match self.position {
MatchPosition::Word { token_position, .. } => token_position,
MatchPosition::Phrase { token_positions: [ftp, _], .. } => ftp,
}
}
pub(super) fn get_last_token_pos(&self) -> usize {
match self.position {
MatchPosition::Word { token_position, .. } => token_position,
MatchPosition::Phrase { token_positions: [_, ltp], .. } => ltp,
}
}
pub(super) fn get_word_count(&self) -> usize {
match self.position {
MatchPosition::Word { .. } => 1,
MatchPosition::Phrase { word_positions: [fwp, lwp], .. } => lwp - fwp + 1,
}
}
}

35
crates/milli/src/search/new/matches/matching_words.rs
View File

@ -86,14 +86,17 @@ impl MatchingWords {
continue;
};
let prefix_length = char_index + c.len_utf8();
let char_len = token.original_lengths(prefix_length).0;
let (char_count, byte_len) = token.original_lengths(prefix_length);
let ids = &located_words.positions;
return Some(MatchType::Full { char_len, ids });
return Some(MatchType::Full { ids, char_count, byte_len });
// else we exact match the token.
} else if token.lemma() == word {
let char_len = token.char_end - token.char_start;
let ids = &located_words.positions;
return Some(MatchType::Full { char_len, ids });
return Some(MatchType::Full {
char_count: token.char_end - token.char_start,
byte_len: token.byte_end - token.byte_start,
ids,
});
}
}
}
@ -130,7 +133,7 @@ impl<'a> Iterator for MatchesIter<'a, '_> {
word.map(|word| self.matching_words.word_interner.get(word).as_str())
})
.collect();
let partial = PartialMatch { matching_words: words, ids, char_len: 0 };
let partial = PartialMatch { matching_words: words, ids };
partial.match_token(self.token).or_else(|| self.next())
}
@ -149,7 +152,7 @@ pub type WordId = u16;
/// In these cases we need to match consecutively several tokens to consider that the match is full.
#[derive(Debug, PartialEq)]
pub enum MatchType<'a> {
Full { char_len: usize, ids: &'a RangeInclusive<WordId> },
Full { char_count: usize, byte_len: usize, ids: &'a RangeInclusive<WordId> },
Partial(PartialMatch<'a>),
}
@ -158,7 +161,6 @@ pub enum MatchType<'a> {
pub struct PartialMatch<'a> {
matching_words: Vec<Option<&'a str>>,
ids: &'a RangeInclusive<WordId>,
char_len: usize,
}
impl<'a> PartialMatch<'a> {
@ -176,25 +178,24 @@ impl<'a> PartialMatch<'a> {
None => token.is_stopword(),
};
let char_len = token.char_end - token.char_start;
// if there are remaining words to match in the phrase and the current token is matching,
// return a new Partial match allowing the highlighter to continue.
if is_matching && matching_words.len() > 1 {
matching_words.remove(0);
Some(MatchType::Partial(PartialMatch { matching_words, ids, char_len }))
Some(MatchType::Partial(Self { matching_words, ids }))
// if there is no remaining word to match in the phrase and the current token is matching,
// return a Full match.
} else if is_matching {
Some(MatchType::Full { char_len, ids })
Some(MatchType::Full {
char_count: token.char_end - token.char_start,
byte_len: token.byte_end - token.byte_start,
ids,
})
// if the current token doesn't match, return None to break the match sequence.
} else {
None
}
}
pub fn char_len(&self) -> usize {
self.char_len
}
}
impl fmt::Debug for MatchingWords {
@ -276,7 +277,7 @@ pub(crate) mod tests {
..Default::default()
})
.next(),
Some(MatchType::Full { char_len: 5, ids: &(0..=0) })
Some(MatchType::Full { char_count: 5, byte_len: 5, ids: &(0..=0) })
);
assert_eq!(
matching_words
@ -300,7 +301,7 @@ pub(crate) mod tests {
..Default::default()
})
.next(),
Some(MatchType::Full { char_len: 5, ids: &(2..=2) })
Some(MatchType::Full { char_count: 5, byte_len: 5, ids: &(2..=2) })
);
assert_eq!(
matching_words
@ -312,7 +313,7 @@ pub(crate) mod tests {
..Default::default()
})
.next(),
Some(MatchType::Full { char_len: 5, ids: &(2..=2) })
Some(MatchType::Full { char_count: 5, byte_len: 5, ids: &(2..=2) })
);
assert_eq!(
matching_words

397
crates/milli/src/search/new/matches/mod.rs
View File

@ -1,11 +1,19 @@
use std::borrow::Cow;
mod best_match_interval;
mod r#match;
mod matching_words;
mod simple_token_kind;
use charabia::{Language, SeparatorKind, Token, Tokenizer};
use either::Either;
pub use matching_words::MatchingWords;
use matching_words::{MatchType, PartialMatch, WordId};
use matching_words::{MatchType, PartialMatch};
use r#match::{Match, MatchPosition};
use serde::Serialize;
pub mod matching_words;
use simple_token_kind::SimpleTokenKind;
use std::{
borrow::Cow,
cmp::{max, min},
};
const DEFAULT_CROP_MARKER: &str = "…";
const DEFAULT_HIGHLIGHT_PREFIX: &str = "<em>";
@ -93,17 +101,6 @@ impl FormatOptions {
}
}
#[derive(Clone, Debug)]
pub struct Match {
match_len: usize,
// ids of the query words that matches.
ids: Vec<WordId>,
// position of the word in the whole text.
word_position: usize,
// position of the token in the whole text.
token_position: usize,
}
#[derive(Serialize, Debug, Clone, PartialEq, Eq)]
pub struct MatchBounds {
pub start: usize,
@ -130,41 +127,27 @@ impl<'t, 'tokenizer> Matcher<'t, 'tokenizer, '_, '_> {
/// compute_partial_match peek into next words to validate if the match is complete.
fn compute_partial_match<'a>(
mut partial: PartialMatch<'a>,
token_position: usize,
word_position: usize,
first_token_position: usize,
first_word_position: usize,
first_word_char_start: &usize,
words_positions: &mut impl Iterator<Item = (usize, usize, &'a Token<'a>)>,
matches: &mut Vec<Match>,
) -> bool {
let mut potential_matches = vec![(token_position, word_position, partial.char_len())];
for (token_position, word_position, word) in words_positions {
partial = match partial.match_token(word) {
// token matches the partial match, but the match is not full,
// we temporarily save the current token then we try to match the next one.
Some(MatchType::Partial(partial)) => {
potential_matches.push((token_position, word_position, partial.char_len()));
partial
}
Some(MatchType::Partial(partial)) => partial,
// partial match is now full, we keep this matches and we advance positions
Some(MatchType::Full { char_len, ids }) => {
let ids: Vec<_> = ids.clone().collect();
// save previously matched tokens as matches.
let iter = potential_matches.into_iter().map(
|(token_position, word_position, match_len)| Match {
match_len,
ids: ids.clone(),
word_position,
token_position,
},
);
matches.extend(iter);
Some(MatchType::Full { ids, .. }) => {
// save the token that closes the partial match as a match.
matches.push(Match {
match_len: char_len,
ids,
word_position,
token_position,
char_count: word.char_end - *first_word_char_start,
ids: ids.clone().collect(),
position: MatchPosition::Phrase {
word_positions: [first_word_position, word_position],
token_positions: [first_token_position, token_position],
},
});
// the match is complete, we return true.
@ -202,13 +185,12 @@ impl<'t, 'tokenizer> Matcher<'t, 'tokenizer, '_, '_> {
match match_type {
// we match, we save the current token as a match,
// then we continue the rest of the tokens.
MatchType::Full { char_len, ids } => {
MatchType::Full { ids, char_count, .. } => {
let ids: Vec<_> = ids.clone().collect();
matches.push(Match {
match_len: char_len,
char_count,
ids,
word_position,
token_position,
position: MatchPosition::Word { word_position, token_position },
});
break;
}
@ -221,6 +203,7 @@ impl<'t, 'tokenizer> Matcher<'t, 'tokenizer, '_, '_> {
partial,
token_position,
word_position,
&word.char_start,
&mut wp,
&mut matches,
) {
@ -243,56 +226,99 @@ impl<'t, 'tokenizer> Matcher<'t, 'tokenizer, '_, '_> {
Some((tokens, matches)) => matches
.iter()
.map(|m| MatchBounds {
start: tokens[m.token_position].byte_start,
length: m.match_len,
start: tokens[m.get_first_token_pos()].byte_start,
// TODO: Why is this in chars, while start is in bytes?
length: m.char_count,
})
.collect(),
}
}
/// Returns the bounds in byte index of the crop window.
fn crop_bounds(
&self,
tokens: &[Token<'_>],
matches: &[Match],
crop_size: usize,
) -> (usize, usize) {
// if there is no match, we start from the beginning of the string by default.
let first_match_word_position = matches.first().map(|m| m.word_position).unwrap_or(0);
let first_match_token_position = matches.first().map(|m| m.token_position).unwrap_or(0);
let last_match_word_position = matches.last().map(|m| m.word_position).unwrap_or(0);
let last_match_token_position = matches.last().map(|m| m.token_position).unwrap_or(0);
fn crop_bounds(&self, tokens: &[Token<'_>], matches: &[Match], crop_size: usize) -> [usize; 2] {
let (
mut remaining_words,
is_iterating_forward,
before_tokens_starting_index,
after_tokens_starting_index,
) = if !matches.is_empty() {
let [matches_first, matches_last] =
best_match_interval::find_best_match_interval(matches, crop_size);
// matches needs to be counted in the crop len.
let mut remaining_words = crop_size + first_match_word_position - last_match_word_position;
let matches_size =
matches_last.get_last_word_pos() - matches_first.get_first_word_pos() + 1;
let is_crop_size_gte_match_size = crop_size >= matches_size;
let is_iterating_forward = matches_size == 0 || is_crop_size_gte_match_size;
let remaining_words = if is_crop_size_gte_match_size {
crop_size - matches_size
} else {
// in case matches size is greater than crop size, which implies there's only one match,
// we count words backwards, because we have to remove words, as they're extra words outside of
// crop window
matches_size - crop_size
};
let after_tokens_starting_index = if matches_size == 0 {
0
} else {
let last_match_last_token_position_plus_one = matches_last.get_last_token_pos() + 1;
if last_match_last_token_position_plus_one < tokens.len() {
last_match_last_token_position_plus_one
} else {
// we have matched the end of possible tokens, there's nothing to advance
tokens.len() - 1
}
};
(
remaining_words,
is_iterating_forward,
if is_iterating_forward { matches_first.get_first_token_pos() } else { 0 },
after_tokens_starting_index,
)
} else {
(crop_size, true, 0, 0)
};
// create the initial state of the crop window: 2 iterators starting from the matches positions,
// a reverse iterator starting from the first match token position and going towards the beginning of the text,
let mut before_tokens = tokens[..first_match_token_position].iter().rev().peekable();
// an iterator starting from the last match token position and going towards the end of the text.
let mut after_tokens = tokens[last_match_token_position..].iter().peekable();
let mut before_tokens = tokens[..before_tokens_starting_index].iter().rev().peekable();
// an iterator ...
let mut after_tokens = if is_iterating_forward {
// ... starting from the last match token position and going towards the end of the text.
Either::Left(tokens[after_tokens_starting_index..].iter().peekable())
} else {
// ... starting from the last match token position and going towards the start of the text.
Either::Right(tokens[..=after_tokens_starting_index].iter().rev().peekable())
};
// grows the crop window peeking in both directions
// until the window contains the good number of words:
while remaining_words > 0 {
let before_token = before_tokens.peek().map(|t| t.separator_kind());
let after_token = after_tokens.peek().map(|t| t.separator_kind());
let before_token_kind = before_tokens.peek().map(SimpleTokenKind::new);
let after_token_kind =
after_tokens.as_mut().either(|v| v.peek(), |v| v.peek()).map(SimpleTokenKind::new);
match (before_token, after_token) {
match (before_token_kind, after_token_kind) {
// we can expand both sides.
(Some(before_token), Some(after_token)) => {
match (before_token, after_token) {
(Some(before_token_kind), Some(after_token_kind)) => {
match (before_token_kind, after_token_kind) {
// if they are both separators and are the same kind then advance both,
// or expand in the soft separator separator side.
(Some(before_token_kind), Some(after_token_kind)) => {
if before_token_kind == after_token_kind {
(
SimpleTokenKind::Separator(before_token_separator_kind),
SimpleTokenKind::Separator(after_token_separator_kind),
) => {
if before_token_separator_kind == after_token_separator_kind {
before_tokens.next();
// this avoid having an ending separator before crop marker.
if remaining_words > 1 {
after_tokens.next();
}
} else if before_token_kind == SeparatorKind::Hard {
} else if matches!(before_token_separator_kind, SeparatorKind::Hard) {
after_tokens.next();
} else {
before_tokens.next();
@ -300,17 +326,17 @@ impl<'t, 'tokenizer> Matcher<'t, 'tokenizer, '_, '_> {
}
// if one of the tokens is a word, we expend in the side of the word.
// left is a word, advance left.
(None, Some(_)) => {
(SimpleTokenKind::NotSeparator, SimpleTokenKind::Separator(_)) => {
before_tokens.next();
remaining_words -= 1;
}
// right is a word, advance right.
(Some(_), None) => {
(SimpleTokenKind::Separator(_), SimpleTokenKind::NotSeparator) => {
after_tokens.next();
remaining_words -= 1;
}
// both are words, advance left then right if remaining_word > 0.
(None, None) => {
(SimpleTokenKind::NotSeparator, SimpleTokenKind::NotSeparator) => {
before_tokens.next();
remaining_words -= 1;
@ -322,16 +348,16 @@ impl<'t, 'tokenizer> Matcher<'t, 'tokenizer, '_, '_> {
}
}
// the end of the text is reached, advance left.
(Some(before_token), None) => {
(Some(before_token_kind), None) => {
before_tokens.next();
if before_token.is_none() {
if matches!(before_token_kind, SimpleTokenKind::NotSeparator) {
remaining_words -= 1;
}
}
// the start of the text is reached, advance right.
(None, Some(after_token)) => {
(None, Some(after_token_kind)) => {
after_tokens.next();
if after_token.is_none() {
if matches!(after_token_kind, SimpleTokenKind::NotSeparator) {
remaining_words -= 1;
}
}
@ -344,86 +370,7 @@ impl<'t, 'tokenizer> Matcher<'t, 'tokenizer, '_, '_> {
let crop_byte_start = before_tokens.next().map_or(0, |t| t.byte_end);
let crop_byte_end = after_tokens.next().map_or(self.text.len(), |t| t.byte_start);
(crop_byte_start, crop_byte_end)
}
/// Compute the score of a match interval:
/// 1) count unique matches
/// 2) calculate distance between matches
/// 3) count ordered matches
fn match_interval_score(&self, matches: &[Match]) -> (i16, i16, i16) {
let mut ids: Vec<WordId> = Vec::with_capacity(matches.len());
let mut order_score = 0;
let mut distance_score = 0;
let mut iter = matches.iter().peekable();
while let Some(m) = iter.next() {
if let Some(next_match) = iter.peek() {
// if matches are ordered
if next_match.ids.iter().min() > m.ids.iter().min() {
order_score += 1;
}
// compute distance between matches
distance_score -= (next_match.word_position - m.word_position).min(7) as i16;
}
ids.extend(m.ids.iter());
}
ids.sort_unstable();
ids.dedup();
let uniq_score = ids.len() as i16;
// rank by unique match count, then by distance between matches, then by ordered match count.
(uniq_score, distance_score, order_score)
}
/// Returns the matches interval where the score computed by match_interval_score is the best.
fn find_best_match_interval<'a>(&self, matches: &'a [Match], crop_size: usize) -> &'a [Match] {
// we compute the matches interval if we have at least 2 matches.
if matches.len() > 1 {
// positions of the first and the last match of the best matches interval in `matches`.
let mut best_interval = (0, 0);
let mut best_interval_score = self.match_interval_score(&matches[0..=0]);
// current interval positions.
let mut interval_first = 0;
let mut interval_last = 0;
for (index, next_match) in matches.iter().enumerate().skip(1) {
// if next match would make interval gross more than crop_size,
// we compare the current interval with the best one,
// then we increase `interval_first` until next match can be added.
if next_match.word_position - matches[interval_first].word_position >= crop_size {
let interval_score =
self.match_interval_score(&matches[interval_first..=interval_last]);
// keep interval if it's the best
if interval_score > best_interval_score {
best_interval = (interval_first, interval_last);
best_interval_score = interval_score;
}
// advance start of the interval while interval is longer than crop_size.
while next_match.word_position - matches[interval_first].word_position
>= crop_size
{
interval_first += 1;
}
}
interval_last = index;
}
// compute the last interval score and compare it to the best one.
let interval_score =
self.match_interval_score(&matches[interval_first..=interval_last]);
if interval_score > best_interval_score {
best_interval = (interval_first, interval_last);
}
&matches[best_interval.0..=best_interval.1]
} else {
matches
}
[crop_byte_start, crop_byte_end]
}
// Returns the formatted version of the original text.
@ -434,69 +381,87 @@ impl<'t, 'tokenizer> Matcher<'t, 'tokenizer, '_, '_> {
} else {
match &self.matches {
Some((tokens, matches)) => {
// If the text has to be cropped,
// crop around the best interval.
let (byte_start, byte_end) = match format_options.crop {
// If the text has to be cropped, crop around the best interval.
let [crop_byte_start, crop_byte_end] = match format_options.crop {
Some(crop_size) if crop_size > 0 => {
let matches = self.find_best_match_interval(matches, crop_size);
self.crop_bounds(tokens, matches, crop_size)
}
_ => (0, self.text.len()),
_ => [0, self.text.len()],
};
let mut formatted = Vec::new();
// push crop marker if it's not the start of the text.
if byte_start > 0 && !self.crop_marker.is_empty() {
if crop_byte_start > 0 && !self.crop_marker.is_empty() {
formatted.push(self.crop_marker);
}
let mut byte_index = byte_start;
let mut byte_index = crop_byte_start;
if format_options.highlight {
// insert highlight markers around matches.
for m in matches {
let token = &tokens[m.token_position];
let [m_byte_start, m_byte_end] = match m.position {
MatchPosition::Word { token_position, .. } => {
let token = &tokens[token_position];
[&token.byte_start, &token.byte_end]
}
MatchPosition::Phrase { token_positions: [ftp, ltp], .. } => {
[&tokens[ftp].byte_start, &tokens[ltp].byte_end]
}
};
// skip matches out of the crop window.
if token.byte_start < byte_start || token.byte_end > byte_end {
// skip matches out of the crop window
if *m_byte_end < crop_byte_start || *m_byte_start > crop_byte_end {
continue;
}
if byte_index < token.byte_start {
formatted.push(&self.text[byte_index..token.byte_start]);
// adjust start and end to the crop window size
let [m_byte_start, m_byte_end] = [
max(m_byte_start, &crop_byte_start),
min(m_byte_end, &crop_byte_end),
];
// push text that is positioned before our matches
if byte_index < *m_byte_start {
formatted.push(&self.text[byte_index..*m_byte_start]);
}
let highlight_byte_index = self.text[token.byte_start..]
.char_indices()
.enumerate()
.find(|(i, _)| *i == m.match_len)
.map_or(token.byte_end, |(_, (i, _))| i + token.byte_start);
formatted.push(self.highlight_prefix);
formatted.push(&self.text[token.byte_start..highlight_byte_index]);
// TODO: This is additional work done, charabia::token::Token byte_len
// should already get us the original byte length, however, that doesn't work as
// it's supposed to, investigate why
let highlight_byte_index = self.text[*m_byte_start..]
.char_indices()
.nth(m.char_count)
.map_or(*m_byte_end, |(i, _)| min(i + *m_byte_start, *m_byte_end));
formatted.push(&self.text[*m_byte_start..highlight_byte_index]);
formatted.push(self.highlight_suffix);
// if it's a prefix highlight, we put the end of the word after the highlight marker.
if highlight_byte_index < token.byte_end {
formatted.push(&self.text[highlight_byte_index..token.byte_end]);
if highlight_byte_index < *m_byte_end {
formatted.push(&self.text[highlight_byte_index..*m_byte_end]);
}
byte_index = token.byte_end;
byte_index = *m_byte_end;
}
}
// push the rest of the text between last match and the end of crop.
if byte_index < byte_end {
formatted.push(&self.text[byte_index..byte_end]);
if byte_index < crop_byte_end {
formatted.push(&self.text[byte_index..crop_byte_end]);
}
// push crop marker if it's not the end of the text.
if byte_end < self.text.len() && !self.crop_marker.is_empty() {
if crop_byte_end < self.text.len() && !self.crop_marker.is_empty() {
formatted.push(self.crop_marker);
}
if formatted.len() == 1 {
// avoid concatenating if there is already 1 slice.
Cow::Borrowed(&self.text[byte_start..byte_end])
Cow::Borrowed(&self.text[crop_byte_start..crop_byte_end])
} else {
Cow::Owned(formatted.concat())
}
@ -821,22 +786,24 @@ mod tests {
fn format_highlight_crop_phrase_query() {
//! testing: https://github.com/meilisearch/meilisearch/issues/3975
let temp_index = TempIndex::new();
let text = "The groundbreaking invention had the power to split the world between those who embraced progress and those who resisted change!";
temp_index
.add_documents(documents!([
{ "id": 1, "text": "The groundbreaking invention had the power to split the world between those who embraced progress and those who resisted change!" }
{ "id": 1, "text": text }
]))
.unwrap();
let rtxn = temp_index.read_txn().unwrap();
let format_options = FormatOptions { highlight: true, crop: Some(10) };
let text = "The groundbreaking invention had the power to split the world between those who embraced progress and those who resisted change!";
let builder = MatcherBuilder::new_test(&rtxn, &temp_index, "\"the world\"");
let mut matcher = builder.build(text, None);
// should return 10 words with a marker at the start as well the end, and the highlighted matches.
insta::assert_snapshot!(
matcher.format(format_options),
@"…had the power to split <em>the</em> <em>world</em> between those who…"
@"…the power to split <em>the world</em> between those who embraced…"
);
let builder = MatcherBuilder::new_test(&rtxn, &temp_index, "those \"and those\"");
@ -844,7 +811,63 @@ mod tests {
// should highlight "those" and the phrase "and those".
insta::assert_snapshot!(
matcher.format(format_options),
@"…world between <em>those</em> who embraced progress <em>and</em> <em>those</em> who resisted…"
@"…world between <em>those</em> who embraced progress <em>and those</em> who resisted…"
);
let builder = MatcherBuilder::new_test(
&rtxn,
&temp_index,
"\"The groundbreaking invention had the power to split the world\"",
);
let mut matcher = builder.build(text, None);
insta::assert_snapshot!(
matcher.format(format_options),
@"<em>The groundbreaking invention had the power to split the world</em>…"
);
let builder = MatcherBuilder::new_test(
&rtxn,
&temp_index,
"\"The groundbreaking invention had the power to split the world between those\"",
);
let mut matcher = builder.build(text, None);
insta::assert_snapshot!(
matcher.format(format_options),
@"<em>The groundbreaking invention had the power to split the world</em>…"
);
let builder = MatcherBuilder::new_test(
&rtxn,
&temp_index,
"\"The groundbreaking invention\" \"embraced progress and those who resisted change!\"",
);
let mut matcher = builder.build(text, None);
insta::assert_snapshot!(
matcher.format(format_options),
// TODO: Should include exclamation mark without crop markers
@"…between those who <em>embraced progress and those who resisted change</em>…"
);
let builder = MatcherBuilder::new_test(
&rtxn,
&temp_index,
"\"groundbreaking invention\" \"split the world between\"",
);
let mut matcher = builder.build(text, None);
insta::assert_snapshot!(
matcher.format(format_options),
@"…<em>groundbreaking invention</em> had the power to <em>split the world between</em>…"
);
let builder = MatcherBuilder::new_test(
&rtxn,
&temp_index,
"\"groundbreaking invention\" \"had the power to split the world between those\"",
);
let mut matcher = builder.build(text, None);
insta::assert_snapshot!(
matcher.format(format_options),
@"…<em>invention</em> <em>had the power to split the world between those</em>…"
);
}
@ -900,7 +923,7 @@ mod tests {
let mut matcher = builder.build(text, None);
insta::assert_snapshot!(
matcher.format(format_options),
@"_the_ _do_ _or_ die can't be he do and or isn'_t_ _he_"
@"_the_ _do or_ die can't be he do and or isn'_t he_"
);
}
}

15
crates/milli/src/search/new/matches/simple_token_kind.rs Normal file
View File

@ -0,0 +1,15 @@
use charabia::{SeparatorKind, Token, TokenKind};
pub enum SimpleTokenKind {
Separator(SeparatorKind),
NotSeparator,
}
impl SimpleTokenKind {
pub fn new(token: &&Token<'_>) -> Self {
match token.kind {
TokenKind::Separator(separaor_kind) => Self::Separator(separaor_kind),
_ => Self::NotSeparator,
}
}
}