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ui.go
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ui.go
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package main
import (
"fmt"
"math"
"strings"
"time"
)
var BARS = [...]rune{' ', '▁', '▂', '▃', '▄', '▅', '▆', '▇', '█'}
var SHADED_BLOCKS = [...]rune{' ', '░', '▒', '▓', '█'}
const ICON_PLAY = string(rune(0xf04b))
const ICON_PAUSE = string(rune(0xf04c))
const ICON_STOP = string(rune(0xf04d))
const ICON_SPEAKER = string(rune(0xf09f))
type UI struct {
Data []uint8
Type []string
Nodes []string
Message string
Clear bool
}
func (ui *UI) Init() {
clear()
}
func (ui *UI) Render() {
if ui.Clear { clear(); ui.Clear = false }
home()
fmt.Print(" ")
ui.line(func(i int) { fmt.Printf(" %2c", BARS[mapChannelToBar(ui.Data[i])]) })
ui.line(func(i int) { fmt.Printf(" %2d", i + 1) })
ui.line(func(i int) { fmt.Printf(" %2s", mapChannelToValue(ui.Data[i])) })
ui.line(func(i int) { fmt.Printf(" %2s", ui.Type[i]) })
fmt.Print("\n\n")
for _, s := range ui.Nodes { fmt.Println(s) }
fmt.Print("\n\n")
fmt.Println(ui.Message)
}
func (ui UI) Update(dt time.Duration) {
ui.Render()
}
func (ui UI) line(fn func(i int)) {
fmt.Print("\n ")
split := conf.PreviewSplit
for i := range ui.Data {
fn(i)
if split > 0 && ((i + 1) % split) == 0 {
fmt.Print("\n ")
}
}
}
func (ui UI) Bar(value float64, width int) string {
b := int(math.Ceil(value * float64(width)))
f := strings.Repeat(string(SHADED_BLOCKS[4]), b)
e := strings.Repeat(string(SHADED_BLOCKS[1]), width - b)
return f + e
}
func (ui UI) BarRange(from, to, total float64, width int, full bool) string {
cb := '-'
cmb := '['
cmm := ' '
cme := ']'
if full {
cb = SHADED_BLOCKS[1]
cmb = SHADED_BLOCKS[4]
cmm = SHADED_BLOCKS[4]
cme = SHADED_BLOCKS[4]
}
ce := cb
bvalue := from / total
b := int(math.Ceil(bvalue * float64(width)))
mvalue := to / total
m := 0
if to > 0 {
m = int(math.Floor(mvalue * float64(width))) + 1 - b
}
e := width - (b + m)
sb := strings.Repeat(string(cb), b)
s := sb
if m > 0 {
if m >= 1 { s += string(cmb) }
if m >= 3 { s += strings.Repeat(string(cmm), m - 2) }
if m >= 2 { s += string(cme) }
}
s += strings.Repeat(string(ce), e)
return s
}
func clear() {
print("\033[H\033[2J")
}
func home() {
print("\033[H")
}
func mapChannelToBar(v uint8) int {
if v == 0 { return 0 }
if v == 255 { return 8 }
var vf float64
vf = (float64(v) - 0) / 254
return int(math.Ceil(vf * 7))
}
func mapChannelToValue(v uint8) string {
if v == 0 { return "--" }
if v == 255 { return "FL" }
return fmt.Sprintf("%02d", int(math.Ceil(float64(v) / 2.57)))
}