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package mpb
import (
"io"
"github.com/acarl005/stripansi"
"github.com/mattn/go-runewidth"
"github.com/vbauerster/mpb/v7/decor"
"github.com/vbauerster/mpb/v7/internal"
)
const (
iLbound = iota
iRbound
iFiller
iRefiller
iPadding
components
)
// BarStyleComposer interface.
type BarStyleComposer interface {
BarFillerBuilder
Lbound(string) BarStyleComposer
Rbound(string) BarStyleComposer
Filler(string) BarStyleComposer
Refiller(string) BarStyleComposer
Padding(string) BarStyleComposer
Tip(...string) BarStyleComposer
Reverse() BarStyleComposer
}
type bFiller struct {
components [components]*component
tip struct {
count uint
frames []*component
}
flush func(dst io.Writer, filling, padding [][]byte)
}
type component struct {
width int
bytes []byte
}
type barStyle struct {
lbound string
rbound string
filler string
refiller string
padding string
tip []string
rev bool
}
// BarStyle constructs default bar style which can be altered via
// BarStyleComposer interface.
func BarStyle() BarStyleComposer {
return &barStyle{
lbound: "[",
rbound: "]",
filler: "=",
refiller: "+",
padding: "-",
tip: []string{">"},
}
}
func (s *barStyle) Lbound(bound string) BarStyleComposer {
s.lbound = bound
return s
}
func (s *barStyle) Rbound(bound string) BarStyleComposer {
s.rbound = bound
return s
}
func (s *barStyle) Filler(filler string) BarStyleComposer {
s.filler = filler
return s
}
func (s *barStyle) Refiller(refiller string) BarStyleComposer {
s.refiller = refiller
return s
}
func (s *barStyle) Padding(padding string) BarStyleComposer {
s.padding = padding
return s
}
func (s *barStyle) Tip(tip ...string) BarStyleComposer {
if len(tip) != 0 {
s.tip = append(s.tip[:0], tip...)
}
return s
}
func (s *barStyle) Reverse() BarStyleComposer {
s.rev = true
return s
}
func (s *barStyle) Build() BarFiller {
bf := new(bFiller)
if s.rev {
bf.flush = func(dst io.Writer, filling, padding [][]byte) {
flush(dst, padding, filling)
}
} else {
bf.flush = flush
}
bf.components[iLbound] = &component{
width: runewidth.StringWidth(stripansi.Strip(s.lbound)),
bytes: []byte(s.lbound),
}
bf.components[iRbound] = &component{
width: runewidth.StringWidth(stripansi.Strip(s.rbound)),
bytes: []byte(s.rbound),
}
bf.components[iFiller] = &component{
width: runewidth.StringWidth(stripansi.Strip(s.filler)),
bytes: []byte(s.filler),
}
bf.components[iRefiller] = &component{
width: runewidth.StringWidth(stripansi.Strip(s.refiller)),
bytes: []byte(s.refiller),
}
bf.components[iPadding] = &component{
width: runewidth.StringWidth(stripansi.Strip(s.padding)),
bytes: []byte(s.padding),
}
bf.tip.frames = make([]*component, len(s.tip))
for i, t := range s.tip {
bf.tip.frames[i] = &component{
width: runewidth.StringWidth(stripansi.Strip(t)),
bytes: []byte(t),
}
}
return bf
}
func (s *bFiller) Fill(w io.Writer, width int, stat decor.Statistics) {
width = internal.CheckRequestedWidth(width, stat.AvailableWidth)
brackets := s.components[iLbound].width + s.components[iRbound].width
if width < brackets {
return
}
// don't count brackets as progress
width -= brackets
w.Write(s.components[iLbound].bytes)
defer w.Write(s.components[iRbound].bytes)
curWidth := int(internal.PercentageRound(stat.Total, stat.Current, width))
refWidth, filled := 0, curWidth
filling := make([][]byte, 0, curWidth)
if curWidth > 0 && curWidth != width {
tipFrame := s.tip.frames[s.tip.count%uint(len(s.tip.frames))]
filling = append(filling, tipFrame.bytes)
curWidth -= tipFrame.width
s.tip.count++
}
if stat.Refill > 0 && curWidth > 0 {
refWidth = int(internal.PercentageRound(stat.Total, int64(stat.Refill), width))
if refWidth > curWidth {
refWidth = curWidth
}
curWidth -= refWidth
}
for curWidth > 0 && curWidth >= s.components[iFiller].width {
filling = append(filling, s.components[iFiller].bytes)
curWidth -= s.components[iFiller].width
if s.components[iFiller].width == 0 {
break
}
}
for refWidth > 0 && refWidth >= s.components[iRefiller].width {
filling = append(filling, s.components[iRefiller].bytes)
refWidth -= s.components[iRefiller].width
if s.components[iRefiller].width == 0 {
break
}
}
filled -= curWidth + refWidth
padWidth := width - filled
padding := make([][]byte, 0, padWidth)
for padWidth > 0 && padWidth >= s.components[iPadding].width {
padding = append(padding, s.components[iPadding].bytes)
padWidth -= s.components[iPadding].width
if s.components[iPadding].width == 0 {
break
}
}
for padWidth > 0 {
padding = append(padding, []byte("…"))
padWidth--
}
s.flush(w, filling, padding)
}
func flush(dst io.Writer, filling, padding [][]byte) {
for i := len(filling) - 1; i >= 0; i-- {
dst.Write(filling[i])
}
for i := 0; i < len(padding); i++ {
dst.Write(padding[i])
}
}
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