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gitea/vendor/github.com/blevesearch/bleve/search/highlight/term_locations.go

106 lines
2.8 KiB
Go

// Copyright (c) 2014 Couchbase, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package highlight
import (
"reflect"
"sort"
"github.com/blevesearch/bleve/search"
)
type TermLocation struct {
Term string
ArrayPositions search.ArrayPositions
Pos int
Start int
End int
}
func (tl *TermLocation) Overlaps(other *TermLocation) bool {
if reflect.DeepEqual(tl.ArrayPositions, other.ArrayPositions) {
if other.Start >= tl.Start && other.Start < tl.End {
return true
} else if tl.Start >= other.Start && tl.Start < other.End {
return true
}
}
return false
}
type TermLocations []*TermLocation
func (t TermLocations) Len() int { return len(t) }
func (t TermLocations) Swap(i, j int) { t[i], t[j] = t[j], t[i] }
func (t TermLocations) Less(i, j int) bool {
shortestArrayPositions := len(t[i].ArrayPositions)
if len(t[j].ArrayPositions) < shortestArrayPositions {
shortestArrayPositions = len(t[j].ArrayPositions)
}
// compare all the common array positions
for api := 0; api < shortestArrayPositions; api++ {
if t[i].ArrayPositions[api] < t[j].ArrayPositions[api] {
return true
}
if t[i].ArrayPositions[api] > t[j].ArrayPositions[api] {
return false
}
}
// all the common array positions are the same
if len(t[i].ArrayPositions) < len(t[j].ArrayPositions) {
return true // j array positions, longer so greater
} else if len(t[i].ArrayPositions) > len(t[j].ArrayPositions) {
return false // j array positions, shorter so less
}
// array positions the same, compare starts
return t[i].Start < t[j].Start
}
func (t TermLocations) MergeOverlapping() {
var lastTl *TermLocation
for i, tl := range t {
if lastTl == nil && tl != nil {
lastTl = tl
} else if lastTl != nil && tl != nil {
if lastTl.Overlaps(tl) {
// ok merge this with previous
lastTl.End = tl.End
t[i] = nil
}
}
}
}
func OrderTermLocations(tlm search.TermLocationMap) TermLocations {
rv := make(TermLocations, 0)
for term, locations := range tlm {
for _, location := range locations {
tl := TermLocation{
Term: term,
ArrayPositions: location.ArrayPositions,
Pos: int(location.Pos),
Start: int(location.Start),
End: int(location.End),
}
rv = append(rv, &tl)
}
}
sort.Sort(rv)
return rv
}