mirror of
https://github.com/Llewellynvdm/fzf.git
synced 2024-12-23 03:19:01 +00:00
Fix #344 - Backward scan when --tiebreak=end
This commit is contained in:
Junegunn Choi
parent
9017e29741
commit
64443221aa
@ -15,8 +15,15 @@ import (
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* In short: They try to do as little work as possible.
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*/
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func runeAt(runes []rune, index int, max int, forward bool) rune {
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if forward {
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return runes[index]
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}
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return runes[max-index-1]
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}
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// FuzzyMatch performs fuzzy-match
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func FuzzyMatch(caseSensitive bool, runes []rune, pattern []rune) (int, int) {
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func FuzzyMatch(caseSensitive bool, forward bool, runes []rune, pattern []rune) (int, int) {
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if len(pattern) == 0 {
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return 0, 0
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}
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@ -34,7 +41,11 @@ func FuzzyMatch(caseSensitive bool, runes []rune, pattern []rune) (int, int) {
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sidx := -1
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eidx := -1
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for index, char := range runes {
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lenRunes := len(runes)
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lenPattern := len(pattern)
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for index := range runes {
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char := runeAt(runes, index, lenRunes, forward)
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// This is considerably faster than blindly applying strings.ToLower to the
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// whole string
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if !caseSensitive {
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@ -47,11 +58,12 @@ func FuzzyMatch(caseSensitive bool, runes []rune, pattern []rune) (int, int) {
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char = unicode.To(unicode.LowerCase, char)
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}
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}
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if char == pattern[pidx] {
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pchar := runeAt(pattern, pidx, lenPattern, forward)
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if char == pchar {
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if sidx < 0 {
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sidx = index
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}
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if pidx++; pidx == len(pattern) {
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if pidx++; pidx == lenPattern {
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eidx = index + 1
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break
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}
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@ -61,7 +73,7 @@ func FuzzyMatch(caseSensitive bool, runes []rune, pattern []rune) (int, int) {
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if sidx >= 0 && eidx >= 0 {
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pidx--
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for index := eidx - 1; index >= sidx; index-- {
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char := runes[index]
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char := runeAt(runes, index, lenRunes, forward)
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if !caseSensitive {
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if char >= 'A' && char <= 'Z' {
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char += 32
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@ -69,14 +81,19 @@ func FuzzyMatch(caseSensitive bool, runes []rune, pattern []rune) (int, int) {
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char = unicode.To(unicode.LowerCase, char)
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}
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}
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if char == pattern[pidx] {
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pchar := runeAt(pattern, pidx, lenPattern, forward)
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if char == pchar {
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if pidx--; pidx < 0 {
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sidx = index
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break
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}
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}
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}
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return sidx, eidx
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if forward {
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return sidx, eidx
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}
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return lenRunes - eidx, lenRunes - sidx
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}
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return -1, -1
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}
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@ -88,20 +105,21 @@ func FuzzyMatch(caseSensitive bool, runes []rune, pattern []rune) (int, int) {
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//
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// We might try to implement better algorithms in the future:
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// http://en.wikipedia.org/wiki/String_searching_algorithm
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func ExactMatchNaive(caseSensitive bool, runes []rune, pattern []rune) (int, int) {
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func ExactMatchNaive(caseSensitive bool, forward bool, runes []rune, pattern []rune) (int, int) {
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if len(pattern) == 0 {
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return 0, 0
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}
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numRunes := len(runes)
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plen := len(pattern)
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if numRunes < plen {
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lenRunes := len(runes)
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lenPattern := len(pattern)
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if lenRunes < lenPattern {
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return -1, -1
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}
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pidx := 0
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for index := 0; index < numRunes; index++ {
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char := runes[index]
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for index := 0; index < lenRunes; index++ {
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char := runeAt(runes, index, lenRunes, forward)
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if !caseSensitive {
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if char >= 'A' && char <= 'Z' {
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char += 32
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@ -109,10 +127,14 @@ func ExactMatchNaive(caseSensitive bool, runes []rune, pattern []rune) (int, int
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char = unicode.To(unicode.LowerCase, char)
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}
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}
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if pattern[pidx] == char {
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pchar := runeAt(pattern, pidx, lenPattern, forward)
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if pchar == char {
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pidx++
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if pidx == plen {
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return index - plen + 1, index + 1
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if pidx == lenPattern {
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if forward {
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return index - lenPattern + 1, index + 1
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}
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return lenRunes - (index + 1), lenRunes - (index - lenPattern + 1)
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}
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} else {
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index -= pidx
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@ -123,7 +145,7 @@ func ExactMatchNaive(caseSensitive bool, runes []rune, pattern []rune) (int, int
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}
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// PrefixMatch performs prefix-match
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func PrefixMatch(caseSensitive bool, runes []rune, pattern []rune) (int, int) {
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func PrefixMatch(caseSensitive bool, forward bool, runes []rune, pattern []rune) (int, int) {
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if len(runes) < len(pattern) {
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return -1, -1
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}
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@ -141,7 +163,7 @@ func PrefixMatch(caseSensitive bool, runes []rune, pattern []rune) (int, int) {
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}
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// SuffixMatch performs suffix-match
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func SuffixMatch(caseSensitive bool, input []rune, pattern []rune) (int, int) {
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func SuffixMatch(caseSensitive bool, forward bool, input []rune, pattern []rune) (int, int) {
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runes := util.TrimRight(input)
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trimmedLen := len(runes)
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diff := trimmedLen - len(pattern)
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@ -162,7 +184,7 @@ func SuffixMatch(caseSensitive bool, input []rune, pattern []rune) (int, int) {
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}
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// EqualMatch performs equal-match
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func EqualMatch(caseSensitive bool, runes []rune, pattern []rune) (int, int) {
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func EqualMatch(caseSensitive bool, forward bool, runes []rune, pattern []rune) (int, int) {
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if len(runes) != len(pattern) {
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return -1, -1
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}
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@ -5,11 +5,11 @@ import (
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"testing"
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)
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func assertMatch(t *testing.T, fun func(bool, []rune, []rune) (int, int), caseSensitive bool, input string, pattern string, sidx int, eidx int) {
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func assertMatch(t *testing.T, fun func(bool, bool, []rune, []rune) (int, int), caseSensitive bool, forward bool, input string, pattern string, sidx int, eidx int) {
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if !caseSensitive {
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pattern = strings.ToLower(pattern)
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}
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s, e := fun(caseSensitive, []rune(input), []rune(pattern))
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s, e := fun(caseSensitive, forward, []rune(input), []rune(pattern))
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if s != sidx {
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t.Errorf("Invalid start index: %d (expected: %d, %s / %s)", s, sidx, input, pattern)
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}
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@ -19,33 +19,51 @@ func assertMatch(t *testing.T, fun func(bool, []rune, []rune) (int, int), caseSe
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}
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func TestFuzzyMatch(t *testing.T) {
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assertMatch(t, FuzzyMatch, false, "fooBarbaz", "oBZ", 2, 9)
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assertMatch(t, FuzzyMatch, true, "fooBarbaz", "oBZ", -1, -1)
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assertMatch(t, FuzzyMatch, true, "fooBarbaz", "oBz", 2, 9)
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assertMatch(t, FuzzyMatch, true, "fooBarbaz", "fooBarbazz", -1, -1)
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assertMatch(t, FuzzyMatch, false, true, "fooBarbaz", "oBZ", 2, 9)
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assertMatch(t, FuzzyMatch, true, true, "fooBarbaz", "oBZ", -1, -1)
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assertMatch(t, FuzzyMatch, true, true, "fooBarbaz", "oBz", 2, 9)
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assertMatch(t, FuzzyMatch, true, true, "fooBarbaz", "fooBarbazz", -1, -1)
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}
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func TestFuzzyMatchBackward(t *testing.T) {
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assertMatch(t, FuzzyMatch, false, true, "foobar fb", "fb", 0, 4)
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assertMatch(t, FuzzyMatch, false, false, "foobar fb", "fb", 7, 9)
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}
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func TestExactMatchNaive(t *testing.T) {
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assertMatch(t, ExactMatchNaive, false, "fooBarbaz", "oBA", 2, 5)
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assertMatch(t, ExactMatchNaive, true, "fooBarbaz", "oBA", -1, -1)
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assertMatch(t, ExactMatchNaive, true, "fooBarbaz", "fooBarbazz", -1, -1)
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for _, dir := range []bool{true, false} {
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assertMatch(t, ExactMatchNaive, false, dir, "fooBarbaz", "oBA", 2, 5)
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assertMatch(t, ExactMatchNaive, true, dir, "fooBarbaz", "oBA", -1, -1)
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assertMatch(t, ExactMatchNaive, true, dir, "fooBarbaz", "fooBarbazz", -1, -1)
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}
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}
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func TestExactMatchNaiveBackward(t *testing.T) {
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assertMatch(t, FuzzyMatch, false, true, "foobar foob", "oo", 1, 3)
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assertMatch(t, FuzzyMatch, false, false, "foobar foob", "oo", 8, 10)
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}
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func TestPrefixMatch(t *testing.T) {
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assertMatch(t, PrefixMatch, false, "fooBarbaz", "Foo", 0, 3)
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assertMatch(t, PrefixMatch, true, "fooBarbaz", "Foo", -1, -1)
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assertMatch(t, PrefixMatch, false, "fooBarbaz", "baz", -1, -1)
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for _, dir := range []bool{true, false} {
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assertMatch(t, PrefixMatch, false, dir, "fooBarbaz", "Foo", 0, 3)
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assertMatch(t, PrefixMatch, true, dir, "fooBarbaz", "Foo", -1, -1)
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assertMatch(t, PrefixMatch, false, dir, "fooBarbaz", "baz", -1, -1)
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}
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}
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func TestSuffixMatch(t *testing.T) {
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assertMatch(t, SuffixMatch, false, "fooBarbaz", "Foo", -1, -1)
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assertMatch(t, SuffixMatch, false, "fooBarbaz", "baz", 6, 9)
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assertMatch(t, SuffixMatch, true, "fooBarbaz", "Baz", -1, -1)
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for _, dir := range []bool{true, false} {
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assertMatch(t, SuffixMatch, false, dir, "fooBarbaz", "Foo", -1, -1)
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assertMatch(t, SuffixMatch, false, dir, "fooBarbaz", "baz", 6, 9)
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assertMatch(t, SuffixMatch, true, dir, "fooBarbaz", "Baz", -1, -1)
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}
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}
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func TestEmptyPattern(t *testing.T) {
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assertMatch(t, FuzzyMatch, true, "foobar", "", 0, 0)
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assertMatch(t, ExactMatchNaive, true, "foobar", "", 0, 0)
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assertMatch(t, PrefixMatch, true, "foobar", "", 0, 0)
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assertMatch(t, SuffixMatch, true, "foobar", "", 6, 6)
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for _, dir := range []bool{true, false} {
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assertMatch(t, FuzzyMatch, true, dir, "foobar", "", 0, 0)
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assertMatch(t, ExactMatchNaive, true, dir, "foobar", "", 0, 0)
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assertMatch(t, PrefixMatch, true, dir, "foobar", "", 0, 0)
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assertMatch(t, SuffixMatch, true, dir, "foobar", "", 6, 6)
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}
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}
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@ -143,7 +143,8 @@ func Run(opts *Options) {
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// Matcher
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patternBuilder := func(runes []rune) *Pattern {
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return BuildPattern(
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opts.Mode, opts.Case, opts.Nth, opts.Delimiter, runes)
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opts.Mode, opts.Case, opts.Tiebreak != byEnd,
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opts.Nth, opts.Delimiter, runes)
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}
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matcher := NewMatcher(patternBuilder, sort, opts.Tac, eventBox)
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@ -39,12 +39,13 @@ type term struct {
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type Pattern struct {
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mode Mode
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caseSensitive bool
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forward bool
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text []rune
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terms []term
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hasInvTerm bool
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delimiter Delimiter
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nth []Range
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procFun map[termType]func(bool, []rune, []rune) (int, int)
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procFun map[termType]func(bool, bool, []rune, []rune) (int, int)
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}
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var (
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@ -70,7 +71,7 @@ func clearChunkCache() {
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}
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// BuildPattern builds Pattern object from the given arguments
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func BuildPattern(mode Mode, caseMode Case,
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func BuildPattern(mode Mode, caseMode Case, forward bool,
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nth []Range, delimiter Delimiter, runes []rune) *Pattern {
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var asString string
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@ -109,12 +110,13 @@ func BuildPattern(mode Mode, caseMode Case,
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ptr := &Pattern{
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mode: mode,
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caseSensitive: caseSensitive,
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forward: forward,
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text: []rune(asString),
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terms: terms,
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hasInvTerm: hasInvTerm,
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nth: nth,
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delimiter: delimiter,
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procFun: make(map[termType]func(bool, []rune, []rune) (int, int))}
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procFun: make(map[termType]func(bool, bool, []rune, []rune) (int, int))}
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ptr.procFun[termFuzzy] = algo.FuzzyMatch
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ptr.procFun[termEqual] = algo.EqualMatch
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@ -288,7 +290,7 @@ func dupItem(item *Item, offsets []Offset) *Item {
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func (p *Pattern) fuzzyMatch(item *Item) (int, int) {
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input := p.prepareInput(item)
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return p.iter(algo.FuzzyMatch, input, p.caseSensitive, p.text)
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return p.iter(algo.FuzzyMatch, input, p.caseSensitive, p.forward, p.text)
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}
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func (p *Pattern) extendedMatch(item *Item) []Offset {
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@ -296,7 +298,7 @@ func (p *Pattern) extendedMatch(item *Item) []Offset {
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offsets := []Offset{}
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for _, term := range p.terms {
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pfun := p.procFun[term.typ]
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if sidx, eidx := p.iter(pfun, input, term.caseSensitive, term.text); sidx >= 0 {
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if sidx, eidx := p.iter(pfun, input, term.caseSensitive, p.forward, term.text); sidx >= 0 {
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if term.inv {
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break
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}
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@ -324,11 +326,11 @@ func (p *Pattern) prepareInput(item *Item) []Token {
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return ret
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}
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func (p *Pattern) iter(pfun func(bool, []rune, []rune) (int, int),
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tokens []Token, caseSensitive bool, pattern []rune) (int, int) {
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func (p *Pattern) iter(pfun func(bool, bool, []rune, []rune) (int, int),
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tokens []Token, caseSensitive bool, forward bool, pattern []rune) (int, int) {
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for _, part := range tokens {
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prefixLength := part.prefixLength
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if sidx, eidx := pfun(caseSensitive, part.text, pattern); sidx >= 0 {
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if sidx, eidx := pfun(caseSensitive, forward, part.text, pattern); sidx >= 0 {
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return sidx + prefixLength, eidx + prefixLength
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}
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}
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@ -58,10 +58,10 @@ func TestParseTermsEmpty(t *testing.T) {
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func TestExact(t *testing.T) {
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defer clearPatternCache()
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clearPatternCache()
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pattern := BuildPattern(ModeExtended, CaseSmart,
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pattern := BuildPattern(ModeExtended, CaseSmart, true,
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[]Range{}, Delimiter{}, []rune("'abc"))
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sidx, eidx := algo.ExactMatchNaive(
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pattern.caseSensitive, []rune("aabbcc abc"), pattern.terms[0].text)
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pattern.caseSensitive, pattern.forward, []rune("aabbcc abc"), pattern.terms[0].text)
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if sidx != 7 || eidx != 10 {
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t.Errorf("%s / %d / %d", pattern.terms, sidx, eidx)
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}
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@ -70,11 +70,11 @@ func TestExact(t *testing.T) {
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func TestEqual(t *testing.T) {
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defer clearPatternCache()
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clearPatternCache()
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pattern := BuildPattern(ModeExtended, CaseSmart, []Range{}, Delimiter{}, []rune("^AbC$"))
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pattern := BuildPattern(ModeExtended, CaseSmart, true, []Range{}, Delimiter{}, []rune("^AbC$"))
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match := func(str string, sidxExpected int, eidxExpected int) {
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sidx, eidx := algo.EqualMatch(
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pattern.caseSensitive, []rune(str), pattern.terms[0].text)
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pattern.caseSensitive, pattern.forward, []rune(str), pattern.terms[0].text)
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if sidx != sidxExpected || eidx != eidxExpected {
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t.Errorf("%s / %d / %d", pattern.terms, sidx, eidx)
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}
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@ -86,17 +86,17 @@ func TestEqual(t *testing.T) {
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func TestCaseSensitivity(t *testing.T) {
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defer clearPatternCache()
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clearPatternCache()
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pat1 := BuildPattern(ModeFuzzy, CaseSmart, []Range{}, Delimiter{}, []rune("abc"))
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pat1 := BuildPattern(ModeFuzzy, CaseSmart, true, []Range{}, Delimiter{}, []rune("abc"))
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clearPatternCache()
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pat2 := BuildPattern(ModeFuzzy, CaseSmart, []Range{}, Delimiter{}, []rune("Abc"))
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pat2 := BuildPattern(ModeFuzzy, CaseSmart, true, []Range{}, Delimiter{}, []rune("Abc"))
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clearPatternCache()
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pat3 := BuildPattern(ModeFuzzy, CaseIgnore, []Range{}, Delimiter{}, []rune("abc"))
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pat3 := BuildPattern(ModeFuzzy, CaseIgnore, true, []Range{}, Delimiter{}, []rune("abc"))
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clearPatternCache()
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pat4 := BuildPattern(ModeFuzzy, CaseIgnore, []Range{}, Delimiter{}, []rune("Abc"))
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pat4 := BuildPattern(ModeFuzzy, CaseIgnore, true, []Range{}, Delimiter{}, []rune("Abc"))
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clearPatternCache()
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pat5 := BuildPattern(ModeFuzzy, CaseRespect, []Range{}, Delimiter{}, []rune("abc"))
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pat5 := BuildPattern(ModeFuzzy, CaseRespect, true, []Range{}, Delimiter{}, []rune("abc"))
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clearPatternCache()
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pat6 := BuildPattern(ModeFuzzy, CaseRespect, []Range{}, Delimiter{}, []rune("Abc"))
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pat6 := BuildPattern(ModeFuzzy, CaseRespect, true, []Range{}, Delimiter{}, []rune("Abc"))
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if string(pat1.text) != "abc" || pat1.caseSensitive != false ||
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string(pat2.text) != "Abc" || pat2.caseSensitive != true ||
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@ -109,7 +109,7 @@ func TestCaseSensitivity(t *testing.T) {
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}
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func TestOrigTextAndTransformed(t *testing.T) {
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pattern := BuildPattern(ModeExtended, CaseSmart, []Range{}, Delimiter{}, []rune("jg"))
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pattern := BuildPattern(ModeExtended, CaseSmart, true, []Range{}, Delimiter{}, []rune("jg"))
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tokens := Tokenize([]rune("junegunn"), Delimiter{})
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trans := Transform(tokens, []Range{Range{1, 1}})
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@ -527,6 +527,17 @@ class TestGoFZF < TestBase
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assert_equal output, `cat #{tempname} | #{FZF} -fh -n2 -d:`.split($/)
|
||||
end
|
||||
|
||||
def test_tiebreak_end_backward_scan
|
||||
input = %w[
|
||||
foobar-fb
|
||||
fubar
|
||||
]
|
||||
writelines tempname, input
|
||||
|
||||
assert_equal input.reverse, `cat #{tempname} | #{FZF} -f fb`.split($/)
|
||||
assert_equal input, `cat #{tempname} | #{FZF} -f fb --tiebreak=end`.split($/)
|
||||
end
|
||||
|
||||
def test_invalid_cache
|
||||
tmux.send_keys "(echo d; echo D; echo x) | #{fzf '-q d'}", :Enter
|
||||
tmux.until { |lines| lines[-2].include? '2/3' }
|
||||
|
||||
Loading…
Reference in New Issue
Block a user