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Improve search fuzzy matching

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This commit is contained in:
Thibaut 2014-12-14 15:51:48 -05:00
parent cca1b37ce0
commit a677417665
1 changed files with 18 additions and 5 deletions
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23
assets/javascripts/app/searcher.coffee
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@ -13,6 +13,8 @@ fuzzyRegexp = # query fuzzy regexp
index = # position of the query in the string being matched
lastIndex = # last position of the query in the string being matched
match = # regexp match data
matchIndex =
matchLength =
score = # score for the current match
separators = # counter
i = null # cursor
@ -74,16 +76,27 @@ return Math.max 1, score
`function fuzzyMatch() {`
return if valueLength <= queryLength or value.indexOf(query) >= 0
return unless match = fuzzyRegexp.exec(value)
matchIndex = match.index
matchLength = match[0].length
score = scoreFuzzyMatch()
if match = fuzzyRegexp.exec(value.slice(i = value.lastIndexOf(SEPARATOR) + 1))
matchIndex = i + match.index
matchLength = match[0].length
return Math.max(score, scoreFuzzyMatch())
else
return score
`}`
`function scoreFuzzyMatch() {`
# When the match is at the beginning of the string or preceded by a dot.
if match.index is 0 or value.charAt(match.index - 1) is SEPARATOR
return Math.max 66, 100 - match[0].length
if matchIndex is 0 or value.charAt(matchIndex - 1) is SEPARATOR
return Math.max 66, 100 - matchLength
# When the match is at the end of the string.
else if match.index + match[0].length is valueLength
return Math.max 33, 67 - match[0].length
else if matchIndex + matchLength is valueLength
return Math.max 33, 67 - matchLength
# When the match is in the middle of the string.
else
return Math.max 1, 34 - match[0].length
return Math.max 1, 34 - matchLength
`}`
#