github.com/jhump/protoreflect@v1.16.0/dynamic/indent.go (about)

     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  }