714 lines
22 KiB
Go
714 lines
22 KiB
Go
package main
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import (
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"bytes"
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"fmt"
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"image"
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"image/color"
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_ "image/gif"
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_ "image/jpeg"
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_ "image/png"
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"io"
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"log"
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"math"
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"net/http"
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"strconv"
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"strings"
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"time"
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"github.com/anthonynsimon/bild/blur"
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"github.com/anthonynsimon/bild/effect"
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"github.com/anthonynsimon/bild/segment"
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"github.com/nfnt/resize"
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"simonwaldherr.de/go/zplgfa"
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)
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const maxUploadSize = 20 << 20 // 20 MB
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func getGraphicType(t string) zplgfa.GraphicType {
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switch strings.ToUpper(t) {
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case "ASCII":
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return zplgfa.ASCII
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case "BINARY":
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return zplgfa.Binary
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default:
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return zplgfa.CompressedASCII
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}
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}
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func invertImage(img image.Image) image.Image {
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b := img.Bounds()
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out := image.NewNRGBA(b)
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for y := b.Min.Y; y < b.Max.Y; y++ {
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for x := b.Min.X; x < b.Max.X; x++ {
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r, g, bv, a := img.At(x, y).RGBA()
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out.Set(x, y, color.RGBA{
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R: uint8((65535 - r) >> 8),
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G: uint8((65535 - g) >> 8),
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B: uint8((65535 - bv) >> 8),
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A: uint8(a >> 8),
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})
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}
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}
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return out
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}
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func monochromeImage(img image.Image) image.Image {
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b := img.Bounds()
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out := image.NewNRGBA(b)
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for y := b.Min.Y; y < b.Max.Y; y++ {
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for x := b.Min.X; x < b.Max.X; x++ {
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r, g, bv, a := img.At(x, y).RGBA()
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var v uint8
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if r > math.MaxUint16/2 || g > math.MaxUint16/2 || bv > math.MaxUint16/2 {
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v = 255
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}
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out.Set(x, y, color.RGBA{R: v, G: v, B: v, A: uint8(a >> 8)})
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}
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}
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return out
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}
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func processImage(img image.Image, editFlag string, width, height uint) image.Image {
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if strings.Contains(editFlag, "monochrome") {
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img = monochromeImage(img)
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}
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bounds := img.Bounds()
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if strings.Contains(editFlag, "blur") {
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img = blur.Gaussian(img, float64(bounds.Dx())/300)
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}
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if strings.Contains(editFlag, "edge") {
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img = effect.Sobel(img)
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}
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if strings.Contains(editFlag, "segment") {
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img = segment.Threshold(img, 128)
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}
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if strings.Contains(editFlag, "invert") {
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img = invertImage(img)
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}
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if width > 0 || height > 0 {
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img = resize.Resize(width, height, img, resize.MitchellNetravali)
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}
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return img
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}
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func convertHandler(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodPost {
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http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
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return
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}
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if err := r.ParseMultipartForm(maxUploadSize); err != nil {
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http.Error(w, "file too large", http.StatusBadRequest)
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return
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}
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file, _, err := r.FormFile("file")
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if err != nil {
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http.Error(w, "missing file", http.StatusBadRequest)
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return
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}
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defer file.Close()
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img, _, err := image.Decode(file)
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if err != nil {
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http.Error(w, fmt.Sprintf("cannot decode image: %s", err), http.StatusBadRequest)
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return
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}
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var w2, h2 uint
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if v, err := strconv.ParseUint(r.FormValue("width"), 10, 32); err == nil {
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w2 = uint(v)
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}
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if v, err := strconv.ParseUint(r.FormValue("height"), 10, 32); err == nil {
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h2 = uint(v)
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}
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editFlag := r.FormValue("edit")
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graphicType := getGraphicType(r.FormValue("type"))
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img = processImage(img, editFlag, w2, h2)
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flat := zplgfa.FlattenImage(img)
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zpl := zplgfa.ConvertToZPL(flat, graphicType)
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w.Header().Set("Content-Type", "text/plain; charset=utf-8")
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w.Header().Set("Content-Disposition", `attachment; filename="label.zpl"`)
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fmt.Fprint(w, zpl)
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}
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func previewHandler(w http.ResponseWriter, r *http.Request) {
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// Returns image info (dimensions) before conversion
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if r.Method != http.MethodPost {
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http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
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return
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}
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if err := r.ParseMultipartForm(maxUploadSize); err != nil {
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http.Error(w, "file too large", http.StatusBadRequest)
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return
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}
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file, _, err := r.FormFile("file")
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if err != nil {
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http.Error(w, "missing file", http.StatusBadRequest)
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return
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}
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defer file.Close()
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var buf bytes.Buffer
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buf.ReadFrom(file)
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cfg, _, err := image.DecodeConfig(bytes.NewReader(buf.Bytes()))
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if err != nil {
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http.Error(w, "cannot decode image", http.StatusBadRequest)
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return
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}
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w.Header().Set("Content-Type", "application/json")
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fmt.Fprintf(w, `{"width":%d,"height":%d}`, cfg.Width, cfg.Height)
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}
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var labelaryClient = &http.Client{Timeout: 15 * time.Second}
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func renderHandler(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodPost {
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http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
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return
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}
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dpmm := r.URL.Query().Get("dpmm")
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width := r.URL.Query().Get("width")
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height := r.URL.Query().Get("height")
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if dpmm == "" {
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dpmm = "8"
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}
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if width == "" {
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width = "4"
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}
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if height == "" {
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height = "6"
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}
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body, err := io.ReadAll(r.Body)
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if err != nil {
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http.Error(w, "failed to read body", http.StatusBadRequest)
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return
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}
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url := fmt.Sprintf("http://api.labelary.com/v1/printers/%s/labels/%sx%s/0/", dpmm, width, height)
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req, err := http.NewRequest(http.MethodPost, url, bytes.NewReader(body))
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if err != nil {
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http.Error(w, "failed to build request", http.StatusInternalServerError)
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return
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}
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req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
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req.Header.Set("Accept", "image/png")
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resp, err := labelaryClient.Do(req)
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if err != nil {
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http.Error(w, "labelary unreachable: "+err.Error(), http.StatusBadGateway)
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return
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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http.Error(w, "labelary returned "+resp.Status, http.StatusBadGateway)
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return
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}
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w.Header().Set("Content-Type", "image/png")
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io.Copy(w, resp.Body)
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}
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func main() {
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mux := http.NewServeMux()
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mux.HandleFunc("/convert", convertHandler)
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mux.HandleFunc("/preview", previewHandler)
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mux.HandleFunc("/render", renderHandler)
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mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "text/html; charset=utf-8")
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w.Write([]byte(indexHTML))
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})
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addr := ":4543"
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log.Printf("zplgfa web UI listening on %s", addr)
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log.Fatal(http.ListenAndServe(addr, mux))
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}
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const indexHTML = `<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>zplgfa – Image to ZPL Converter</title>
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<style>
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*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
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body {
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font-family: system-ui, sans-serif;
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background: #0f1117;
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color: #e2e8f0;
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min-height: 100vh;
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display: flex;
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align-items: center;
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justify-content: center;
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padding: 2rem;
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}
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.card {
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background: #1e2130;
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border: 1px solid #2d3348;
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border-radius: 12px;
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padding: 2rem;
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width: 100%;
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max-width: 640px;
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box-shadow: 0 8px 32px rgba(0,0,0,0.4);
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}
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h1 { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.25rem; }
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.subtitle { color: #718096; font-size: 0.875rem; margin-bottom: 1.75rem; }
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.drop-zone {
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border: 2px dashed #3a4060;
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border-radius: 8px;
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padding: 2.5rem 1rem;
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text-align: center;
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cursor: pointer;
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transition: border-color .2s, background .2s;
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margin-bottom: 1.5rem;
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}
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.drop-zone:hover, .drop-zone.over { border-color: #6366f1; background: #1a1e2e; }
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.drop-zone input { display: none; }
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.drop-zone .icon { font-size: 2.5rem; margin-bottom: 0.5rem; }
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.drop-zone .hint { color: #718096; font-size: 0.85rem; }
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.preview-info { margin-top: 0.75rem; font-size: 0.8rem; color: #a0aec0; min-height: 1.2em; }
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.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1rem; }
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.grid3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; margin-bottom: 1rem; }
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label { display: block; font-size: 0.8rem; font-weight: 600; color: #a0aec0; margin-bottom: 0.35rem; }
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input[type=number], select {
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width: 100%;
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background: #252a3d;
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border: 1px solid #3a4060;
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border-radius: 6px;
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color: #e2e8f0;
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padding: 0.5rem 0.75rem;
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font-size: 0.9rem;
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outline: none;
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transition: border-color .2s;
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}
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input[type=number]:focus, select:focus { border-color: #6366f1; }
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/* unit toggle */
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.unit-row {
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display: flex; align-items: center; gap: 0.5rem;
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margin-bottom: 0.75rem;
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}
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.unit-row span { font-size: 0.8rem; color: #a0aec0; font-weight: 600; }
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.toggle-group { display: flex; border: 1px solid #3a4060; border-radius: 6px; overflow: hidden; }
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.toggle-group button {
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flex: 1; background: #252a3d; color: #a0aec0;
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border: none; border-radius: 0; padding: 0.3rem 0.8rem;
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font-size: 0.8rem; font-weight: 600; cursor: pointer; width: auto;
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transition: background .15s, color .15s;
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}
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.toggle-group button.active { background: #6366f1; color: #fff; }
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.sub-label { font-size: 0.7rem; color: #718096; font-weight: 400; margin-top: 0.15rem; }
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.checks { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.5rem; }
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.checks label {
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display: flex; align-items: center; gap: 0.4rem;
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background: #252a3d; border: 1px solid #3a4060;
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border-radius: 6px; padding: 0.35rem 0.7rem;
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cursor: pointer; font-size: 0.8rem; font-weight: 500; color: #cbd5e0;
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margin-bottom: 0;
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transition: border-color .2s, background .2s;
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}
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.checks label:hover { border-color: #6366f1; }
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.checks input[type=checkbox] { accent-color: #6366f1; width: 14px; height: 14px; }
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button {
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width: 100%;
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background: #6366f1;
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color: #fff;
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border: none;
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border-radius: 8px;
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padding: 0.75rem;
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font-size: 1rem;
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font-weight: 600;
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cursor: pointer;
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transition: background .2s, opacity .2s;
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}
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button:hover { background: #4f52d0; }
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button:disabled { opacity: 0.5; cursor: not-allowed; }
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.output { margin-top: 1.5rem; display: none; }
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.output-header {
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display: flex; justify-content: space-between; align-items: center;
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margin-bottom: 0.5rem;
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}
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.output-header span { font-size: 0.8rem; font-weight: 600; color: #a0aec0; }
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.copy-btn {
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background: #252a3d; border: 1px solid #3a4060; border-radius: 6px;
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color: #a0aec0; font-size: 0.75rem; padding: 0.25rem 0.6rem;
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width: auto; font-weight: 500;
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}
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.copy-btn:hover { background: #2d3348; }
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textarea {
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width: 100%; height: 220px;
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background: #0f1117; border: 1px solid #2d3348; border-radius: 6px;
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color: #7dd3fc; font-family: monospace; font-size: 0.75rem;
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padding: 0.75rem; resize: vertical; outline: none;
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}
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.dl-btn { margin-top: 0.75rem; background: #2d6a4f; }
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.dl-btn:hover { background: #215040; }
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.error { color: #fc8181; font-size: 0.85rem; margin-top: 0.75rem; display: none; }
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/* previews */
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.preview-panel {
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margin-bottom: 1.5rem; display: none;
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}
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.preview-panel .panel-header {
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font-size: 0.8rem; font-weight: 600; color: #a0aec0; margin-bottom: 0.5rem;
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}
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.preview-panel img {
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max-width: 100%; max-height: 260px; object-fit: contain;
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border-radius: 6px; border: 1px solid #2d3348; background: #fff;
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display: block;
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}
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.preview-panel .panel-meta {
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font-size: 0.75rem; color: #718096; margin-top: 0.35rem;
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}
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.label-preview-wrap {
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margin-top: 1.25rem; display: none;
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}
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.label-preview-wrap .panel-header {
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display: flex; justify-content: space-between; align-items: center;
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font-size: 0.8rem; font-weight: 600; color: #a0aec0; margin-bottom: 0.5rem;
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}
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.label-preview-wrap img {
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max-width: 100%; border-radius: 6px; border: 1px solid #2d3348;
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background: #fff; display: block;
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}
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.render-status { font-size: 0.75rem; color: #718096; font-weight: 400; }
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.spinner {
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display: none; width: 18px; height: 18px;
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border: 2px solid #ffffff40; border-top-color: #fff;
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border-radius: 50%; animation: spin .6s linear infinite;
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margin: 0 auto;
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}
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@keyframes spin { to { transform: rotate(360deg); } }
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</style>
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</head>
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<body>
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<div class="card">
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<h1>zplgfa</h1>
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<p class="subtitle">Convert images to ZPL Graphic Fields for Zebra label printers</p>
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<div class="drop-zone" id="dropZone">
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<input type="file" id="fileInput" accept="image/png,image/jpeg,image/gif">
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<div class="icon">🖼️</div>
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<div>Drop an image here or <strong>click to browse</strong></div>
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<div class="hint">PNG, JPEG, GIF — max 20 MB</div>
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<div class="preview-info" id="previewInfo"></div>
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</div>
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<!-- Image preview (original) -->
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<div class="preview-panel" id="imgPreviewPanel">
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<div class="panel-header">Image Preview</div>
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<img id="imgPreviewEl" alt="preview">
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<div class="panel-meta" id="imgPreviewMeta"></div>
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</div>
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<!-- Unit toggle + DPI -->
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<div class="unit-row">
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<span>Dimensions in</span>
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<div class="toggle-group">
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<button id="btnPx" class="active" onclick="setUnit('px')">px</button>
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<button id="btnCm" onclick="setUnit('cm')">cm</button>
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</div>
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<span style="margin-left:auto">Printer DPI</span>
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<select id="dpi" style="width:110px">
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<option value="203" selected>203 dpi</option>
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<option value="300">300 dpi</option>
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<option value="600">600 dpi</option>
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</select>
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</div>
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<div class="grid">
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<div>
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<label id="labelW">Width (px)</label>
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<input type="number" id="width" min="0" step="1" value="0" placeholder="0">
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<div class="sub-label" id="subW"></div>
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</div>
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<div>
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<label id="labelH">Height (px)</label>
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<input type="number" id="height" min="0" step="1" value="0" placeholder="0">
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<div class="sub-label" id="subH"></div>
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</div>
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</div>
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<div class="grid" style="margin-bottom:1rem">
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<div>
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<label for="enctype">Encoding</label>
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<select id="enctype">
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<option value="CompressedASCII" selected>CompressedASCII (default)</option>
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<option value="ASCII">ASCII</option>
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<option value="Binary">Binary</option>
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</select>
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</div>
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</div>
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<div class="checks">
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<label><input type="checkbox" name="edit" value="monochrome"> Monochrome</label>
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<label><input type="checkbox" name="edit" value="invert"> Invert</label>
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<label><input type="checkbox" name="edit" value="blur"> Blur</label>
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<label><input type="checkbox" name="edit" value="edge"> Edge detect</label>
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<label><input type="checkbox" name="edit" value="segment"> Segment</label>
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</div>
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<button id="convertBtn" disabled>Convert to ZPL</button>
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<div class="spinner" id="spinner"></div>
|
||
<div class="error" id="error"></div>
|
||
|
||
<div class="output" id="output">
|
||
<div class="output-header">
|
||
<span>ZPL Output</span>
|
||
<button class="copy-btn" id="copyBtn">Copy</button>
|
||
</div>
|
||
<textarea id="zplOutput" readonly></textarea>
|
||
<button class="dl-btn" id="dlBtn">⬇ Download .zpl</button>
|
||
|
||
<!-- Labelary rendered preview -->
|
||
<div class="label-preview-wrap" id="labelPreviewWrap">
|
||
<div class="panel-header">
|
||
<span>Label Preview <span style="font-weight:400;color:#718096">(rendered by Labelary)</span></span>
|
||
<span class="render-status" id="renderStatus"></span>
|
||
</div>
|
||
<img id="labelPreviewImg" alt="label preview">
|
||
</div>
|
||
</div>
|
||
</div>
|
||
|
||
<script>
|
||
const dropZone = document.getElementById('dropZone');
|
||
const fileInput = document.getElementById('fileInput');
|
||
const previewInfo = document.getElementById('previewInfo');
|
||
const convertBtn = document.getElementById('convertBtn');
|
||
const spinner = document.getElementById('spinner');
|
||
const output = document.getElementById('output');
|
||
const zplOutput = document.getElementById('zplOutput');
|
||
const errorEl = document.getElementById('error');
|
||
|
||
let selectedFile = null;
|
||
let currentUnit = 'px'; // 'px' or 'cm'
|
||
let origPxW = 0, origPxH = 0; // image native pixel dimensions
|
||
let imgObjectURL = null;
|
||
|
||
function getDPI() { return parseInt(document.getElementById('dpi').value, 10); }
|
||
|
||
// cm ↔ px helpers
|
||
function pxToCm(px) { return +(px * 2.54 / getDPI()).toFixed(3); }
|
||
function cmToPx(cm) { return Math.round(cm * getDPI() / 2.54); }
|
||
|
||
function setUnit(unit) {
|
||
const wEl = document.getElementById('width');
|
||
const hEl = document.getElementById('height');
|
||
const curW = parseFloat(wEl.value) || 0;
|
||
const curH = parseFloat(hEl.value) || 0;
|
||
|
||
if (unit === 'cm' && currentUnit === 'px') {
|
||
wEl.step = '0.01';
|
||
hEl.step = '0.01';
|
||
wEl.value = curW > 0 ? pxToCm(curW) : 0;
|
||
hEl.value = curH > 0 ? pxToCm(curH) : 0;
|
||
} else if (unit === 'px' && currentUnit === 'cm') {
|
||
wEl.step = '1';
|
||
hEl.step = '1';
|
||
wEl.value = curW > 0 ? cmToPx(curW) : 0;
|
||
hEl.value = curH > 0 ? cmToPx(curH) : 0;
|
||
}
|
||
currentUnit = unit;
|
||
document.getElementById('btnPx').classList.toggle('active', unit === 'px');
|
||
document.getElementById('btnCm').classList.toggle('active', unit === 'cm');
|
||
updateLabels();
|
||
}
|
||
|
||
function updateLabels() {
|
||
const unit = currentUnit;
|
||
document.getElementById('labelW').textContent = 'Width (' + unit + ')' + (unit === 'px' ? ' — 0 = auto' : '');
|
||
document.getElementById('labelH').textContent = 'Height (' + unit + ')' + (unit === 'px' ? ' — 0 = auto' : '');
|
||
updateSubLabels();
|
||
}
|
||
|
||
function updateSubLabels() {
|
||
if (!origPxW) return;
|
||
if (currentUnit === 'px') {
|
||
document.getElementById('subW').textContent = pxToCm(origPxW) + ' cm at ' + getDPI() + ' dpi';
|
||
document.getElementById('subH').textContent = pxToCm(origPxH) + ' cm at ' + getDPI() + ' dpi';
|
||
} else {
|
||
document.getElementById('subW').textContent = origPxW + ' px native';
|
||
document.getElementById('subH').textContent = origPxH + ' px native';
|
||
}
|
||
}
|
||
|
||
// Recalc sub-labels when DPI changes
|
||
document.getElementById('dpi').addEventListener('change', () => {
|
||
if (currentUnit === 'cm') {
|
||
// re-fill cm fields based on original px
|
||
if (origPxW) {
|
||
document.getElementById('width').value = pxToCm(origPxW);
|
||
document.getElementById('height').value = pxToCm(origPxH);
|
||
}
|
||
}
|
||
updateSubLabels();
|
||
});
|
||
|
||
dropZone.addEventListener('click', () => fileInput.click());
|
||
dropZone.addEventListener('dragover', e => { e.preventDefault(); dropZone.classList.add('over'); });
|
||
dropZone.addEventListener('dragleave', () => dropZone.classList.remove('over'));
|
||
dropZone.addEventListener('drop', e => {
|
||
e.preventDefault();
|
||
dropZone.classList.remove('over');
|
||
if (e.dataTransfer.files[0]) setFile(e.dataTransfer.files[0]);
|
||
});
|
||
fileInput.addEventListener('change', () => { if (fileInput.files[0]) setFile(fileInput.files[0]); });
|
||
|
||
function setFile(file) {
|
||
selectedFile = file;
|
||
previewInfo.textContent = 'Loading…';
|
||
convertBtn.disabled = true;
|
||
|
||
// Show image preview immediately
|
||
if (imgObjectURL) URL.revokeObjectURL(imgObjectURL);
|
||
imgObjectURL = URL.createObjectURL(file);
|
||
document.getElementById('imgPreviewEl').src = imgObjectURL;
|
||
document.getElementById('imgPreviewPanel').style.display = 'block';
|
||
|
||
const fd = new FormData();
|
||
fd.append('file', file);
|
||
fetch('/preview', { method: 'POST', body: fd })
|
||
.then(r => r.ok ? r.json() : Promise.reject())
|
||
.then(info => {
|
||
origPxW = info.width;
|
||
origPxH = info.height;
|
||
|
||
const wEl = document.getElementById('width');
|
||
const hEl = document.getElementById('height');
|
||
if (currentUnit === 'px') {
|
||
wEl.value = origPxW;
|
||
hEl.value = origPxH;
|
||
} else {
|
||
wEl.value = pxToCm(origPxW);
|
||
hEl.value = pxToCm(origPxH);
|
||
}
|
||
|
||
const cmW = pxToCm(origPxW), cmH = pxToCm(origPxH);
|
||
previewInfo.textContent =
|
||
file.name + ' — ' + origPxW + ' × ' + origPxH + ' px' +
|
||
' (' + cmW + ' × ' + cmH + ' cm at ' + getDPI() + ' dpi)';
|
||
|
||
document.getElementById('imgPreviewMeta').textContent =
|
||
origPxW + ' × ' + origPxH + ' px | ' + cmW + ' × ' + cmH + ' cm at ' + getDPI() + ' dpi';
|
||
|
||
updateSubLabels();
|
||
convertBtn.disabled = false;
|
||
})
|
||
.catch(() => {
|
||
previewInfo.textContent = file.name;
|
||
convertBtn.disabled = false;
|
||
});
|
||
}
|
||
|
||
// Returns pixel values regardless of current unit
|
||
function getPixelDimensions() {
|
||
const w = parseFloat(document.getElementById('width').value) || 0;
|
||
const h = parseFloat(document.getElementById('height').value) || 0;
|
||
if (currentUnit === 'cm') {
|
||
return { w: cmToPx(w), h: cmToPx(h) };
|
||
}
|
||
return { w: Math.round(w), h: Math.round(h) };
|
||
}
|
||
|
||
function dpmmFromDPI(dpi) {
|
||
const map = { 203: 8, 300: 12, 600: 24 };
|
||
return map[dpi] || 8;
|
||
}
|
||
|
||
async function fetchLabelPreview(zpl, pxW, pxH) {
|
||
const dpi = getDPI();
|
||
const dpmm = dpmmFromDPI(dpi);
|
||
// Labelary needs label size in inches; clamp minimum to avoid API errors
|
||
const wIn = Math.max(pxW / dpi, 0.1).toFixed(4);
|
||
const hIn = Math.max(pxH / dpi, 0.1).toFixed(4);
|
||
|
||
const wrap = document.getElementById('labelPreviewWrap');
|
||
const status = document.getElementById('renderStatus');
|
||
wrap.style.display = 'block';
|
||
status.textContent = 'Rendering…';
|
||
document.getElementById('labelPreviewImg').src = '';
|
||
|
||
try {
|
||
const res = await fetch(
|
||
'/render?dpmm=' + dpmm + '&width=' + wIn + '&height=' + hIn,
|
||
{ method: 'POST', headers: { 'Content-Type': 'text/plain' }, body: zpl }
|
||
);
|
||
if (!res.ok) throw new Error(await res.text());
|
||
const blob = await res.blob();
|
||
const url = URL.createObjectURL(blob);
|
||
document.getElementById('labelPreviewImg').src = url;
|
||
status.textContent = wIn + '" × ' + hIn + '" at ' + dpi + ' dpi';
|
||
} catch (e) {
|
||
status.textContent = 'Preview unavailable: ' + e.message;
|
||
}
|
||
}
|
||
|
||
convertBtn.addEventListener('click', async () => {
|
||
if (!selectedFile) return;
|
||
errorEl.style.display = 'none';
|
||
convertBtn.style.display = 'none';
|
||
spinner.style.display = 'block';
|
||
output.style.display = 'none';
|
||
document.getElementById('labelPreviewWrap').style.display = 'none';
|
||
|
||
const { w, h } = getPixelDimensions();
|
||
const edits = [...document.querySelectorAll('input[name=edit]:checked')].map(c => c.value);
|
||
const fd = new FormData();
|
||
fd.append('file', selectedFile);
|
||
fd.append('width', w);
|
||
fd.append('height', h);
|
||
fd.append('type', document.getElementById('enctype').value);
|
||
fd.append('edit', edits.join(','));
|
||
|
||
try {
|
||
const res = await fetch('/convert', { method: 'POST', body: fd });
|
||
if (!res.ok) {
|
||
const msg = await res.text();
|
||
throw new Error(msg);
|
||
}
|
||
const text = await res.text();
|
||
zplOutput.value = text;
|
||
output.style.display = 'block';
|
||
fetchLabelPreview(text, w || origPxW, h || origPxH);
|
||
} catch (e) {
|
||
errorEl.textContent = 'Error: ' + e.message;
|
||
errorEl.style.display = 'block';
|
||
} finally {
|
||
spinner.style.display = 'none';
|
||
convertBtn.style.display = 'block';
|
||
}
|
||
});
|
||
|
||
document.getElementById('copyBtn').addEventListener('click', () => {
|
||
navigator.clipboard.writeText(zplOutput.value);
|
||
document.getElementById('copyBtn').textContent = 'Copied!';
|
||
setTimeout(() => document.getElementById('copyBtn').textContent = 'Copy', 1500);
|
||
});
|
||
|
||
document.getElementById('dlBtn').addEventListener('click', () => {
|
||
const blob = new Blob([zplOutput.value], { type: 'text/plain' });
|
||
const a = document.createElement('a');
|
||
a.href = URL.createObjectURL(blob);
|
||
a.download = (selectedFile ? selectedFile.name.replace(/\.[^.]+$/, '') : 'label') + '.zpl';
|
||
a.click();
|
||
});
|
||
|
||
// init labels
|
||
updateLabels();
|
||
</script>
|
||
</body>
|
||
</html>
|
||
`
|