snapshot of https://github.com/blevesearch/bleve.git (master, 2026-09-15; blobs > 131072B omitted)

search/highlight/format/plain/plain.go

@@ -0,0 +1,92 @@
+//  Copyright (c) 2022 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 plain
+
+import (
+	"github.com/blevesearch/bleve/v2/registry"
+	"github.com/blevesearch/bleve/v2/search/highlight"
+)
+
+const Name = "plain"
+
+const defaultPlainHighlightBefore = "<start>"
+const defaultPlainHighlightAfter = "<end>"
+
+type FragmentFormatter struct {
+	before string
+	after  string
+}
+
+func NewFragmentFormatter(before, after string) *FragmentFormatter {
+	return &FragmentFormatter{
+		before: before,
+		after:  after,
+	}
+}
+
+func (a *FragmentFormatter) Format(f *highlight.Fragment, orderedTermLocations highlight.TermLocations) string {
+	rv := ""
+	curr := f.Start
+	for _, termLocation := range orderedTermLocations {
+		if termLocation == nil {
+			continue
+		}
+		// make sure the array positions match
+		if !termLocation.ArrayPositions.Equals(f.ArrayPositions) {
+			continue
+		}
+		if termLocation.Start < curr {
+			continue
+		}
+		if termLocation.End > f.End {
+			break
+		}
+		// add the stuff before this location
+		rv += string(f.Orig[curr:termLocation.Start])
+		// start the highlight tag
+		rv += a.before
+		// add the term itself
+		rv += string(f.Orig[termLocation.Start:termLocation.End])
+		// end the highlight tag
+		rv += a.after
+		// update current
+		curr = termLocation.End
+	}
+	// add any remaining text after the last token
+	rv += string(f.Orig[curr:f.End])
+
+	return rv
+}
+
+func Constructor(config map[string]interface{}, cache *registry.Cache) (highlight.FragmentFormatter, error) {
+	before := defaultPlainHighlightBefore
+	beforeVal, ok := config["before"].(string)
+	if ok {
+		before = beforeVal
+	}
+	after := defaultPlainHighlightAfter
+	afterVal, ok := config["after"].(string)
+	if ok {
+		after = afterVal
+	}
+	return NewFragmentFormatter(before, after), nil
+}
+
+func init() {
+	err := registry.RegisterFragmentFormatter(Name, Constructor)
+	if err != nil {
+		panic(err)
+	}
+}