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|
package main
import (
"errors"
"html/template"
"image"
"image/color"
"image/draw"
"image/png"
"log"
"net/http"
"os"
"strconv"
"janouch.name/sklad/bdf"
"janouch.name/sklad/imgutil"
"janouch.name/sklad/label"
"janouch.name/sklad/ql"
)
var tmplFont = template.Must(template.New("font").Parse(`
<!DOCTYPE html>
<html><body>
<h1>PT-CBP label printing tool</h1>
<h2>Choose font</h2>
{{ range $i, $f := . }}
<p><a href='?font={{ $i }}'>
<img src='?font={{ $i }}&preview' title='{{ $f.Path }}'></a>
{{ end }}
</body></html>
`))
var tmplForm = 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='?font={{ .FontIndex }}&scale={{ .Scale }}{{/*
*/}}&text={{ .Text }}&render'>
</td>
<td valign=top><form>
<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>
<legend>Font</legend>
<p>{{ .Font.Name }} <a href='?'>Change</a>
<input type=hidden name=font value='{{ .FontIndex }}'>
<p><label for=scale>Scale:</label>
<input id=scale name=scale value='{{.Scale}}' size=1>
</fieldset>
<fieldset>
<legend>Label</legend>
<p><textarea name=text>{{.Text}}</textarea>
<p>Kind:
<input type=radio id=kind-text name=kind value=text
{{ if eq .Kind "text" }} checked{{ end }}>
<label for=kind-text>plain text (horizontal)</label>
<input type=radio id=kind-qr name=kind value=qr
{{ if eq .Kind "qr" }} checked{{ end }}>
<label for=kind-qr>QR code (vertical)</label>
<p><input type=submit value='Update'>
<input type=submit name=print value='Update and Print'>
</fieldset>
</form></td>
</tr></table>
</body></html>
`))
type fontItem struct {
Path string
Font *bdf.Font
Preview image.Image
}
var fonts = []*fontItem{}
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 r.Method == http.MethodGet {
w.Header().Set("Cache-Control", "no-store")
}
var (
font *fontItem
fontIndex int
err error
)
if fontIndex, err = strconv.Atoi(r.FormValue("font")); err == nil {
font = fonts[fontIndex]
} else {
w.Header().Set("Content-Type", "text/html; charset=utf-8")
if err := tmplFont.Execute(w, fonts); err != nil {
http.Error(w, err.Error(), 500)
}
return
}
if _, ok := r.Form["preview"]; ok {
w.Header().Set("Content-Type", "image/png")
if err := png.Encode(w, font.Preview); 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
FontIndex int
Text string
Scale int
Kind string
}{
Printer: printer,
PrinterErr: printerErr,
InitErr: initErr,
MediaInfo: mediaInfo,
Font: font.Font,
FontIndex: fontIndex,
Text: r.FormValue("text"),
Kind: r.FormValue("kind"),
}
params.Scale, err = strconv.Atoi(r.FormValue("scale"))
if err != nil {
params.Scale = 3
}
if params.Kind == "" {
params.Kind = "text"
}
var img image.Image
if mediaInfo != nil {
if params.Kind == "qr" {
img = &imgutil.LeftRotate{Image: label.GenLabelForHeight(
font.Font, params.Text, mediaInfo.PrintAreaPins, params.Scale)}
} else {
img = label.GenLabelForWidth(
font.Font, params.Text, mediaInfo.PrintAreaPins, params.Scale)
}
if r.FormValue("print") != "" {
if err := printer.Print(img, false); err != nil {
log.Println("print error:", err)
}
}
}
if _, ok := r.Form["render"]; !ok {
w.Header().Set("Content-Type", "text/html; charset=utf-8")
if err := tmplForm.Execute(w, ¶ms); err != nil {
http.Error(w, err.Error(), 500)
}
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, bdfPaths := os.Args[1], os.Args[2:]
for _, path := range bdfPaths {
fi, err := os.Open(path)
if err != nil {
log.Fatalln(err)
}
font, err := bdf.NewFromBDF(fi)
if err != nil {
log.Fatalf("%s: %s\n", path, err)
}
if err := fi.Close(); err != nil {
log.Fatalln(err)
}
r, _ := font.BoundString(font.Name)
super := r.Inset(-3)
img := image.NewRGBA(super)
draw.Draw(img, super, image.White, image.ZP, draw.Src)
font.DrawString(img, image.ZP, color.Black, font.Name)
fonts = append(fonts, &fontItem{Path: path, Font: font, Preview: img})
}
log.Println("starting server")
http.HandleFunc("/", handle)
log.Fatalln(http.ListenAndServe(address, nil))
}
|
