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tui.go
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tui.go
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package main
import (
"bytes"
"errors"
"fmt"
"image"
_ "image/gif"
_ "image/jpeg"
_ "image/png"
"math"
"os"
"os/exec"
"strconv"
"strings"
"atomicgo.dev/cursor"
"github.com/dhowden/tag"
"github.com/mattn/go-runewidth"
"github.com/nfnt/resize"
)
func run(p *Player) {
go listenToKeyboard(p)
for len(p.musics) > 0 {
err := p.play()
if err != nil {
p.skipMusic()
}
}
}
func printMetadata(p *Player) {
file, _ := os.Open(p.getCurrentMusic().path)
defer file.Close()
metadata, err := readMusicMetadata(file)
if err != nil {
fmt.Printf("[WARNING]: Could not load the music metadata of %v\n%v\n", p.getCurrentMusic().path, err)
} else {
printMusicImage(metadata, p.settings.imageChar)
printMusicMetadata(metadata)
}
}
func printMusicImage(m tag.Metadata, c string) {
defer checkImage()
data := m.Picture().Data
reader := bytes.NewReader(data)
image, _, err := image.Decode(reader)
if err != nil {
fmt.Println("[WARNING]: Could not decode the music image.")
return
}
printImage(image, c)
}
func checkImage() {
if r := recover(); r != nil {
printlnCenter("[NO IMAGE]")
}
}
func printImage(img image.Image, char string) {
width, height, _ := getTerminalSize()
min := math.Min(float64(width), float64(height))
size := uint(min)
image := resize.Resize(size, 0, img, resize.Lanczos3)
maxY := image.Bounds().Max.Y - 1
maxX := image.Bounds().Max.X
for y := 0; y < maxY; y += 2 {
for i := 0; i < (width-maxX)/2; i++ {
fmt.Printf(" ")
}
for x := 0; x < maxX; x++ {
r, g, b, _ := image.At(x, y).RGBA()
if char == "▄" {
fmt.Printf("\033[48;2;%d;%d;%dm", r>>8, g>>8, b>>8)
} else {
fmt.Printf("\033[48;2;%d;%d;%d", r>>8, g>>8, b>>8)
}
r, g, b, _ = image.At(x, y+1).RGBA()
fmt.Printf("\033[38;2;%d;%d;%dm%v", r>>8, g>>8, b>>8, char)
}
fmt.Printf("\033[0m")
fmt.Printf("\n")
}
}
func printMusicMetadata(m tag.Metadata) {
printlnCenter(m.Title())
printlnCenter(m.Artist())
printlnCenter(m.Genre())
printlnCenter(strconv.Itoa(m.Year()))
}
func printStatusSpace() {
fmt.Println()
}
func printStatus(p *Player) {
moveCursorToTagsLine()
status := ""
status += getHotTag(p)
status += getShuffleTag(p.status.isShuffled)
status += getPuaseTag(p.status.isPaused, p.status.isAutoPaused)
printCenter(status)
moveCursorToProgressbarLine()
updateProgressBar(p)
}
func printVolume(p *Player) {
moveCursorToTagsLine()
content := "["
maxVolume := 2.0
for i := 0.0; i < maxVolume; i += 0.1 {
if i < p.volume {
content += "❚"
} else {
content += " "
}
}
content += "]"
printCenter(content)
moveCursorToProgressbarLine()
updateProgressBar(p)
}
func moveCursorToTagsLine() {
cursor.Hide()
cursor.Up(1)
cursor.ClearLine()
cursor.StartOfLine()
}
func printDuration(p *Player) {
minutes := int(p.duration.Seconds()) / 60
seconds := int(p.duration.Seconds()) % 60
duratoin := fmt.Sprintf("%d:%02d", minutes, seconds)
printlnCenter(duratoin)
}
func getHotTag(p *Player) string {
music := p.getCurrentMusic()
if music.isHot {
return "🔥[HOT!]🔥"
}
return ""
}
func getPuaseTag(isPaused bool, isAutoPaused bool) string {
if isAutoPaused {
return "[AUTO-PAUSE]"
}
if isPaused {
return "[PUASED]"
}
return ""
}
func getShuffleTag(isShuffled bool) string {
if isShuffled {
return "[SHUFFLED]"
}
return ""
}
func moveCursorToProgressbarLine() {
cursor.Down(1)
}
func printProgressbar(p *Player) {
if !p.status.isPaused {
fmt.Print(p.settings.progressbarChar)
if checkMusicFinished(p) {
interval := getProgressbarInterval(p).Milliseconds()
bound := p.player.Position().Milliseconds()
width, _, _ := getTerminalSize()
content := ""
for i := 0; i < width-(int(bound/interval)); i++ {
content += p.settings.progressbarChar
}
fmt.Print(content)
p.nextMusic()
}
}
}
func updateProgressBar(p *Player) {
interval := getProgressbarInterval(p).Milliseconds()
cursor.Hide()
area := cursor.NewArea()
area.ClearLinesDown(0)
bound := p.player.Position().Milliseconds()
content := ""
for i := 0; i < int(bound/interval); i++ {
content += p.settings.progressbarChar
}
area.Update(content)
cursor.Show()
}
func printCenter(text string) {
err := centerizeCursor(text)
if err != nil {
return
}
fmt.Print(text)
}
func printlnCenter(text string) {
err := centerizeCursor(text)
if err != nil {
return
}
fmt.Println(text)
}
func centerizeCursor(text string) error {
text = strings.TrimSpace(text)
if text == "" || text == "0" {
return errors.New("input text is empty")
}
width, _, _ := getTerminalSize()
length := runewidth.StringWidth(text)
for i := 0; i < (width-length)/2; i++ {
fmt.Print(" ")
}
return nil
}
func getTerminalSize() (int, int, error) {
cmd := exec.Command("stty", "size")
cmd.Stdin = os.Stdin
output, err := cmd.Output()
if err != nil {
fmt.Printf("[ERROR]: Could not get the terminal size.\n%v\n", err)
return 0, 0, err
}
trim := strings.TrimRight(string(output), "\n")
size := strings.Split(trim, " ")
height, err := strconv.Atoi(size[0])
width, _ := strconv.Atoi(size[1])
if err != nil {
fmt.Printf("[ERROR]: Could not parse the terminal size.\n%v\n", err)
return 0, 0, err
}
return width, height, nil
}