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58 lines
1.2 KiB
Go
58 lines
1.2 KiB
Go
package reporting
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import (
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"fmt"
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"io"
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"strings"
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)
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type Printer struct {
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out io.Writer
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prefix string
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}
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func (self *Printer) Println(message string, values ...interface{}) {
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formatted := self.format(message, values...) + newline
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self.out.Write([]byte(formatted))
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}
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func (self *Printer) Print(message string, values ...interface{}) {
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formatted := self.format(message, values...)
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self.out.Write([]byte(formatted))
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}
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func (self *Printer) Insert(text string) {
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self.out.Write([]byte(text))
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}
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func (self *Printer) format(message string, values ...interface{}) string {
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var formatted string
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if len(values) == 0 {
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formatted = self.prefix + message
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} else {
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formatted = self.prefix + fmt.Sprintf(message, values...)
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}
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indented := strings.Replace(formatted, newline, newline+self.prefix, -1)
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return strings.TrimRight(indented, space)
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}
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func (self *Printer) Indent() {
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self.prefix += pad
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}
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func (self *Printer) Dedent() {
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if len(self.prefix) >= padLength {
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self.prefix = self.prefix[:len(self.prefix)-padLength]
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}
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}
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func NewPrinter(out io.Writer) *Printer {
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self := new(Printer)
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self.out = out
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return self
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}
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const space = " "
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const pad = space + space
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const padLength = len(pad)
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