diff options
Diffstat (limited to 'cmd/label-tool')
| -rw-r--r-- | cmd/label-tool/main.go | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/cmd/label-tool/main.go b/cmd/label-tool/main.go new file mode 100644 index 0000000..39a840c --- /dev/null +++ b/cmd/label-tool/main.go @@ -0,0 +1,199 @@ +package main + +import ( + "errors" + "html/template" + "image" + "image/png" + "log" + "net/http" + "os" + "strconv" + + "janouch.name/sklad/bdf" + "janouch.name/sklad/imgutil" + "janouch.name/sklad/label" + "janouch.name/sklad/ql" +) + +var font *bdf.Font + +var tmpl = template.Must(template.New("form").Parse(` +<!DOCTYPE html> +<html><body> +<h1>PT-CBP label printing tool</h1> +<table><tr> +<td valign=top> + <img border=1 src='?img&scale={{.Scale}}&text={{.Text}}'> +</td> +<td valign=top> + <fieldset> + {{ if .Printer }} + + <p>Printer: {{ .Printer.Manufacturer }} {{ .Printer.Model }} + <p>Tape: + {{ if .Printer.LastStatus }} + {{ .Printer.LastStatus.MediaWidthMM }} mm × + {{ .Printer.LastStatus.MediaLengthMM }} mm + + {{ if .MediaInfo }} + (offset: {{ .MediaInfo.SideMarginPins }} pt, + print area: {{ .MediaInfo.PrintAreaPins }} pt) + {{ else }} + (unknown media) + {{ end }} + + {{ if .Printer.LastStatus.Errors }} + {{ range .Printer.LastStatus.Errors }} + <p>Error: {{ . }} + {{ end }} + {{ end }} + + {{ end }} + {{ if .InitErr }} + {{ .InitErr }} + {{ end }} + + {{ else }} + <p>Error: {{ .PrinterErr }} + {{ end }} + </fieldset> + <fieldset> + <p>Font: {{ .Font.Name }} + </fieldset> + <form><fieldset> + <p><label for=text>Text:</label> + <input id=text name=text value='{{.Text}}'> + <label for=scale>Scale:</label> + <input id=scale name=scale value='{{.Scale}}' size=1> + <p><input type=submit value='Update'> + <input type=submit name=print value='Update and Print'> + </fieldset></form> +</td> +</tr></table> +</body></html> +`)) + +func getPrinter() (*ql.Printer, error) { + printer, err := ql.Open() + if err != nil { + return nil, err + } + if printer == nil { + return nil, errors.New("no suitable printer found") + } + return printer, nil +} + +func getStatus(printer *ql.Printer) error { + if err := printer.Initialize(); err != nil { + return err + } + if err := printer.UpdateStatus(); err != nil { + return err + } + return nil +} + +func handle(w http.ResponseWriter, r *http.Request) { + if err := r.ParseForm(); err != nil { + http.Error(w, err.Error(), 500) + return + } + + var ( + initErr error + mediaInfo *ql.MediaInfo + ) + printer, printerErr := getPrinter() + if printerErr == nil { + defer printer.Close() + printer.StatusNotify = func(status *ql.Status) { + log.Printf("\x1b[1mreceived status\x1b[m\n%s", status) + } + + if initErr = getStatus(printer); initErr == nil { + mediaInfo = ql.GetMediaInfo( + printer.LastStatus.MediaWidthMM(), + printer.LastStatus.MediaLengthMM(), + ) + } + } + + var params = struct { + Printer *ql.Printer + PrinterErr error + InitErr error + MediaInfo *ql.MediaInfo + Font *bdf.Font + Text string + Scale int + }{ + Printer: printer, + PrinterErr: printerErr, + InitErr: initErr, + MediaInfo: mediaInfo, + Font: font, + Text: r.FormValue("text"), + } + + var err error + params.Scale, err = strconv.Atoi(r.FormValue("scale")) + if err != nil { + params.Scale = 3 + } + + var img image.Image + if mediaInfo != nil { + img = &imgutil.LeftRotate{Image: label.GenLabelForHeight( + font, params.Text, mediaInfo.PrintAreaPins, params.Scale)} + if r.FormValue("print") != "" { + if err := printer.Print(img); err != nil { + log.Println("print error:", err) + } + } + } + + if _, ok := r.Form["img"]; !ok { + w.Header().Set("Content-Type", "text/html") + tmpl.Execute(w, ¶ms) + return + } + + if mediaInfo == nil { + http.Error(w, "unknown media", 500) + return + } + + w.Header().Set("Content-Type", "image/png") + if err := png.Encode(w, img); err != nil { + http.Error(w, err.Error(), 500) + return + } +} + +func main() { + if len(os.Args) != 3 { + log.Fatalf("usage: %s ADDRESS BDF-FILE\n", os.Args[0]) + } + + address, bdfPath := os.Args[1], os.Args[2] + + var err error + fi, err := os.Open(bdfPath) + if err != nil { + log.Fatalln(err) + } + + font, err = bdf.NewFromBDF(fi) + if err := fi.Close(); err != nil { + log.Fatalln(err) + } + if err != nil { + log.Fatalln(err) + } + + log.Println("starting server") + http.HandleFunc("/", handle) + log.Fatalln(http.ListenAndServe(address, nil)) +} |