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aligner.go
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/
aligner.go
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package main
import (
"bufio"
"io"
)
type Option struct {
Delimiter string
UseRegexp bool
Count int
Margin string
Justify string
}
type Aligner struct {
delimiter *Delimiter
margin *Margin
padding *Padding
space *Space
cells [][]string
}
func NewAligner(opt *Option) (a *Aligner, err error) {
if opt == nil {
opt = &Option{}
}
d, err := NewDelimiter(opt.Delimiter, opt.UseRegexp, opt.Count)
if err != nil {
return nil, err
}
m, err := NewMargin(opt.Margin)
if err != nil {
return nil, err
}
p, err := NewPadding(opt.Justify)
if err != nil {
return nil, err
}
s := NewSpace()
return &Aligner{
delimiter: d,
margin: m,
padding: p,
space: s,
}, nil
}
func (a *Aligner) AddRow(s string) {
row := a.delimiter.Split(a.space.Trim(s))
a.cells = append(a.cells, row)
if len(row) > 1 {
a.space.UpdateLeadingWidth(s)
a.padding.UpdateWidth(row)
}
}
func (a *Aligner) ReadAll(r io.Reader) error {
s := bufio.NewScanner(r)
for s.Scan() {
a.AddRow(s.Text())
}
return s.Err()
}
func (a *Aligner) format(cells []string) string {
if len(cells) == 1 {
return cells[0]
}
return a.space.Adjust(a.margin.Join(a.padding.Format(cells)))
}
func (a *Aligner) Flush(w io.Writer) error {
bw := bufio.NewWriter(w)
for _, row := range a.cells {
if _, err := bw.WriteString(a.format(row) + "\n"); err != nil {
return err
}
}
return bw.Flush()
}