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ansi.go
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ansi.go
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// 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 ansi
import (
"github.com/linbaozhong/bleve/v2/registry"
"github.com/linbaozhong/bleve/v2/search/highlight"
)
const Name = "ansi"
const DefaultAnsiHighlight = BgYellow
type FragmentFormatter struct {
color string
}
func NewFragmentFormatter(color string) *FragmentFormatter {
return &FragmentFormatter{
color: color,
}
}
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])
// add the color
rv += a.color
// add the term itself
rv += string(f.Orig[termLocation.Start:termLocation.End])
// reset the color
rv += Reset
// update current
curr = termLocation.End
}
// add any remaining text after the last token
rv += string(f.Orig[curr:f.End])
return rv
}
// ANSI color control escape sequences.
// Shamelessly copied from https://github.com/sqp/godock/blob/master/libs/log/colors.go
const (
Reset = "\x1b[0m"
Bright = "\x1b[1m"
Dim = "\x1b[2m"
Underscore = "\x1b[4m"
Blink = "\x1b[5m"
Reverse = "\x1b[7m"
Hidden = "\x1b[8m"
FgBlack = "\x1b[30m"
FgRed = "\x1b[31m"
FgGreen = "\x1b[32m"
FgYellow = "\x1b[33m"
FgBlue = "\x1b[34m"
FgMagenta = "\x1b[35m"
FgCyan = "\x1b[36m"
FgWhite = "\x1b[37m"
BgBlack = "\x1b[40m"
BgRed = "\x1b[41m"
BgGreen = "\x1b[42m"
BgYellow = "\x1b[43m"
BgBlue = "\x1b[44m"
BgMagenta = "\x1b[45m"
BgCyan = "\x1b[46m"
BgWhite = "\x1b[47m"
)
func Constructor(config map[string]interface{}, cache *registry.Cache) (highlight.FragmentFormatter, error) {
color := DefaultAnsiHighlight
colorVal, ok := config["color"].(string)
if ok {
color = colorVal
}
return NewFragmentFormatter(color), nil
}
func init() {
registry.RegisterFragmentFormatter(Name, Constructor)
}