mirror of
https://github.com/strongdm/comply
synced 2024-07-05 16:21:46 +00:00
51 lines
1.0 KiB
Go
51 lines
1.0 KiB
Go
// Copyright 2016 Canonical Ltd.
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// Licensed under the LGPLv3, see LICENCE file for details.
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package ansiterm
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import (
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"fmt"
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"sort"
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"strings"
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)
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type attribute int
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const (
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unknownAttribute attribute = -1
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reset attribute = 0
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)
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// sgr returns the escape sequence for the Select Graphic Rendition
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// for the attribute.
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func (a attribute) sgr() string {
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if a < 0 {
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return ""
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}
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return fmt.Sprintf("\x1b[%dm", a)
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}
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type attributes []attribute
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func (a attributes) Len() int { return len(a) }
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func (a attributes) Less(i, j int) bool { return a[i] < a[j] }
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func (a attributes) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
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// sgr returns the combined escape sequence for the Select Graphic Rendition
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// for the sequence of attributes.
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func (a attributes) sgr() string {
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switch len(a) {
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case 0:
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return ""
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case 1:
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return a[0].sgr()
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default:
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sort.Sort(a)
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var values []string
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for _, attr := range a {
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values = append(values, fmt.Sprint(attr))
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}
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return fmt.Sprintf("\x1b[%sm", strings.Join(values, ";"))
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}
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}
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