Scott Baker | 1fe7273 | 2019-10-21 10:58:51 -0700 | [diff] [blame] | 1 | package dynamic |
| 2 | |
| 3 | import "bytes" |
| 4 | |
| 5 | type indentBuffer struct { |
| 6 | bytes.Buffer |
| 7 | indent string |
| 8 | indentCount int |
| 9 | comma bool |
| 10 | } |
| 11 | |
| 12 | func (b *indentBuffer) start() error { |
| 13 | if b.indentCount >= 0 { |
| 14 | b.indentCount++ |
| 15 | return b.newLine(false) |
| 16 | } |
| 17 | return nil |
| 18 | } |
| 19 | |
| 20 | func (b *indentBuffer) sep() error { |
| 21 | if b.indentCount >= 0 { |
| 22 | _, err := b.WriteString(": ") |
| 23 | return err |
| 24 | } else { |
| 25 | return b.WriteByte(':') |
| 26 | } |
| 27 | } |
| 28 | |
| 29 | func (b *indentBuffer) end() error { |
| 30 | if b.indentCount >= 0 { |
| 31 | b.indentCount-- |
| 32 | return b.newLine(false) |
| 33 | } |
| 34 | return nil |
| 35 | } |
| 36 | |
| 37 | func (b *indentBuffer) maybeNext(first *bool) error { |
| 38 | if *first { |
| 39 | *first = false |
| 40 | return nil |
| 41 | } else { |
| 42 | return b.next() |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | func (b *indentBuffer) next() error { |
| 47 | if b.indentCount >= 0 { |
| 48 | return b.newLine(b.comma) |
| 49 | } else if b.comma { |
| 50 | return b.WriteByte(',') |
| 51 | } else { |
| 52 | return b.WriteByte(' ') |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | func (b *indentBuffer) newLine(comma bool) error { |
| 57 | if comma { |
| 58 | err := b.WriteByte(',') |
| 59 | if err != nil { |
| 60 | return err |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | err := b.WriteByte('\n') |
| 65 | if err != nil { |
| 66 | return err |
| 67 | } |
| 68 | |
| 69 | for i := 0; i < b.indentCount; i++ { |
| 70 | _, err := b.WriteString(b.indent) |
| 71 | if err != nil { |
| 72 | return err |
| 73 | } |
| 74 | } |
| 75 | return nil |
| 76 | } |