Adding upstream version 2.5.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

search/highlight/highlighter/ansi/ansi.go

@@ -0,0 +1,53 @@
+//  Copyright (c) 2015 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 ansi
+
+import (
+	"fmt"
+
+	"github.com/blevesearch/bleve/v2/registry"
+	"github.com/blevesearch/bleve/v2/search/highlight"
+	ansiFormatter "github.com/blevesearch/bleve/v2/search/highlight/format/ansi"
+	simpleFragmenter "github.com/blevesearch/bleve/v2/search/highlight/fragmenter/simple"
+	simpleHighlighter "github.com/blevesearch/bleve/v2/search/highlight/highlighter/simple"
+)
+
+const Name = "ansi"
+
+func Constructor(config map[string]interface{}, cache *registry.Cache) (highlight.Highlighter, error) {
+
+	fragmenter, err := cache.FragmenterNamed(simpleFragmenter.Name)
+	if err != nil {
+		return nil, fmt.Errorf("error building fragmenter: %v", err)
+	}
+
+	formatter, err := cache.FragmentFormatterNamed(ansiFormatter.Name)
+	if err != nil {
+		return nil, fmt.Errorf("error building fragment formatter: %v", err)
+	}
+
+	return simpleHighlighter.NewHighlighter(
+			fragmenter,
+			formatter,
+			simpleHighlighter.DefaultSeparator),
+		nil
+}
+
+func init() {
+	err := registry.RegisterHighlighter(Name, Constructor)
+	if err != nil {
+		panic(err)
+	}
+}