94 lines
2.4 KiB
Go
94 lines
2.4 KiB
Go
// Copyright (c) 2014 Couchbase, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package html
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import (
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"html"
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"github.com/blevesearch/bleve/v2/registry"
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"github.com/blevesearch/bleve/v2/search/highlight"
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)
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const Name = "html"
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const defaultHTMLHighlightBefore = "<mark>"
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const defaultHTMLHighlightAfter = "</mark>"
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type FragmentFormatter struct {
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before string
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after string
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}
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func NewFragmentFormatter(before, after string) *FragmentFormatter {
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return &FragmentFormatter{
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before: before,
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after: after,
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}
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}
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func (a *FragmentFormatter) Format(f *highlight.Fragment, orderedTermLocations highlight.TermLocations) string {
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rv := ""
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curr := f.Start
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for _, termLocation := range orderedTermLocations {
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if termLocation == nil {
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continue
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}
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// make sure the array positions match
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if !termLocation.ArrayPositions.Equals(f.ArrayPositions) {
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continue
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}
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if termLocation.Start < curr {
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continue
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}
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if termLocation.End > f.End {
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break
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}
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// add the stuff before this location
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rv += html.EscapeString(string(f.Orig[curr:termLocation.Start]))
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// start the <mark> tag
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rv += a.before
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// add the term itself
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rv += html.EscapeString(string(f.Orig[termLocation.Start:termLocation.End]))
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// end the <mark> tag
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rv += a.after
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// update current
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curr = termLocation.End
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}
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// add any remaining text after the last token
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rv += html.EscapeString(string(f.Orig[curr:f.End]))
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return rv
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}
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func Constructor(config map[string]interface{}, cache *registry.Cache) (highlight.FragmentFormatter, error) {
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before := defaultHTMLHighlightBefore
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beforeVal, ok := config["before"].(string)
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if ok {
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before = beforeVal
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}
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after := defaultHTMLHighlightAfter
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afterVal, ok := config["after"].(string)
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if ok {
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after = afterVal
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}
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return NewFragmentFormatter(before, after), nil
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}
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func init() {
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err := registry.RegisterFragmentFormatter(Name, Constructor)
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if err != nil {
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panic(err)
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}
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}
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