You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
117 lines
3.1 KiB
117 lines
3.1 KiB
// 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 []float64
|
|
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
|
|
}
|
|
|
|
func SameArrayPositions(fieldArrayPositions []uint64, termLocationArrayPositions []float64) bool {
|
|
if len(fieldArrayPositions) != len(termLocationArrayPositions) {
|
|
return false
|
|
}
|
|
for i := 0; i < len(fieldArrayPositions); i++ {
|
|
if fieldArrayPositions[i] != uint64(termLocationArrayPositions[i]) {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|