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Diffstat (limited to 'contrib/barcode')
-rw-r--r--contrib/barcode/barcode.go38
1 files changed, 25 insertions, 13 deletions
diff --git a/contrib/barcode/barcode.go b/contrib/barcode/barcode.go
index e49ac53..4a143da 100644
--- a/contrib/barcode/barcode.go
+++ b/contrib/barcode/barcode.go
@@ -20,6 +20,10 @@ package barcode
import (
"bytes"
"errors"
+ "image/jpeg"
+ "io"
+ "strconv"
+
"github.com/boombuler/barcode"
"github.com/boombuler/barcode/codabar"
"github.com/boombuler/barcode/code128"
@@ -29,20 +33,28 @@ import (
"github.com/boombuler/barcode/qr"
"github.com/boombuler/barcode/twooffive"
"github.com/jung-kurt/gofpdf"
- "image/jpeg"
- "strconv"
)
// barcodes represents the barcodes that have been registered through this
// package. They will later be used to be scaled and put on the page.
var barcodes map[string]barcode.Barcode
+// barcodePdf is a partial PDF implementation that only implements a subset of
+// functions that are required to add the barcode to the PDF.
+type barcodePdf interface {
+ GetConversionRatio() float64
+ GetImageInfo(imageStr string) *gofpdf.ImageInfoType
+ Image(imageNameStr string, x, y, w, h float64, flow bool, tp string, link int, linkStr string)
+ RegisterImageReader(imgName, tp string, r io.Reader) *gofpdf.ImageInfoType
+ SetError(err error)
+}
+
// Barcode puts a registered barcode in the current page.
//
// The size should be specified in the units used to create the PDF document.
//
// Positioning with x, y and flow is inherited from Fpdf.Image().
-func Barcode(pdf *gofpdf.Fpdf, code string, x, y, w, h float64, flow bool) {
+func Barcode(pdf barcodePdf, code string, x, y, w, h float64, flow bool) {
unscaled, ok := barcodes[code]
if !ok {
@@ -90,14 +102,14 @@ func Register(bcode barcode.Barcode) string {
// RegisterCodabar registers a barcode of type Codabar to the PDF, but not to
// the page. Use Barcode() with the return value to put the barcode on the page.
-func RegisterCodabar(pdf *gofpdf.Fpdf, code string) string {
+func RegisterCodabar(pdf barcodePdf, code string) string {
bcode, err := codabar.Encode(code)
return registerBarcode(pdf, bcode, err)
}
// RegisterCode128 registers a barcode of type Code128 to the PDF, but not to
// the page. Use Barcode() with the return value to put the barcode on the page.
-func RegisterCode128(pdf *gofpdf.Fpdf, code string) string {
+func RegisterCode128(pdf barcodePdf, code string) string {
bcode, err := code128.Encode(code)
return registerBarcode(pdf, bcode, err)
}
@@ -106,7 +118,7 @@ func RegisterCode128(pdf *gofpdf.Fpdf, code string) string {
// the page. Use Barcode() with the return value to put the barcode on the page.
//
// includeChecksum and fullASCIIMode are inherited from code39.Encode().
-func RegisterCode39(pdf *gofpdf.Fpdf, code string, includeChecksum, fullASCIIMode bool) string {
+func RegisterCode39(pdf barcodePdf, code string, includeChecksum, fullASCIIMode bool) string {
bcode, err := code39.Encode(code, includeChecksum, fullASCIIMode)
return registerBarcode(pdf, bcode, err)
}
@@ -114,7 +126,7 @@ func RegisterCode39(pdf *gofpdf.Fpdf, code string, includeChecksum, fullASCIIMod
// RegisterDataMatrix registers a barcode of type DataMatrix to the PDF, but not
// to the page. Use Barcode() with the return value to put the barcode on the
// page.
-func RegisterDataMatrix(pdf *gofpdf.Fpdf, code string) string {
+func RegisterDataMatrix(pdf barcodePdf, code string) string {
bcode, err := datamatrix.Encode(code)
return registerBarcode(pdf, bcode, err)
}
@@ -122,7 +134,7 @@ func RegisterDataMatrix(pdf *gofpdf.Fpdf, code string) string {
// RegisterEAN registers a barcode of type EAN to the PDF, but not to the page.
// It will automatically detect if the barcode is EAN8 or EAN13. Use Barcode()
// with the return value to put the barcode on the page.
-func RegisterEAN(pdf *gofpdf.Fpdf, code string) string {
+func RegisterEAN(pdf barcodePdf, code string) string {
bcode, err := ean.Encode(code)
return registerBarcode(pdf, bcode, err)
}
@@ -131,7 +143,7 @@ func RegisterEAN(pdf *gofpdf.Fpdf, code string) string {
// Use Barcode() with the return value to put the barcode on the page.
//
// The ErrorCorrectionLevel and Encoding mode are inherited from qr.Encode().
-func RegisterQR(pdf *gofpdf.Fpdf, code string, ecl qr.ErrorCorrectionLevel, mode qr.Encoding) string {
+func RegisterQR(pdf barcodePdf, code string, ecl qr.ErrorCorrectionLevel, mode qr.Encoding) string {
bcode, err := qr.Encode(code, ecl, mode)
return registerBarcode(pdf, bcode, err)
}
@@ -141,7 +153,7 @@ func RegisterQR(pdf *gofpdf.Fpdf, code string, ecl qr.ErrorCorrectionLevel, mode
// page.
//
// The interleaved bool is inherited from twooffive.Encode().
-func RegisterTwoOfFive(pdf *gofpdf.Fpdf, code string, interleaved bool) string {
+func RegisterTwoOfFive(pdf barcodePdf, code string, interleaved bool) string {
bcode, err := twooffive.Encode(code, interleaved)
return registerBarcode(pdf, bcode, err)
}
@@ -150,7 +162,7 @@ func RegisterTwoOfFive(pdf *gofpdf.Fpdf, code string, interleaved bool) string {
// In case of an error generating the barcode it will not be registered and will
// set an error on the PDF. It will return a unique key for the barcode type and
// content that can be used to put the barcode on the page.
-func registerBarcode(pdf *gofpdf.Fpdf, bcode barcode.Barcode, err error) string {
+func registerBarcode(pdf barcodePdf, bcode barcode.Barcode, err error) string {
if err != nil {
pdf.SetError(err)
}
@@ -178,7 +190,7 @@ func barcodeKey(bcode barcode.Barcode) string {
// registerScaledBarcode registers a barcode with its exact dimensions to the
// PDF but does not put it on the page. Use Fpdf.Image() with the same code to
// add the barcode to the page.
-func registerScaledBarcode(pdf *gofpdf.Fpdf, code string, bcode barcode.Barcode) error {
+func registerScaledBarcode(pdf barcodePdf, code string, bcode barcode.Barcode) error {
buf := new(bytes.Buffer)
err := jpeg.Encode(buf, bcode, nil)
@@ -199,6 +211,6 @@ func registerScaledBarcode(pdf *gofpdf.Fpdf, code string, bcode barcode.Barcode)
// Doing this through the Fpdf.Image() function would mean that it uses a 72 DPI
// value and stretches it to a 96 DPI value. This results in quality loss which
// could be problematic for barcode scanners.
-func convertTo96Dpi(pdf *gofpdf.Fpdf, value float64) float64 {
+func convertTo96Dpi(pdf barcodePdf, value float64) float64 {
return value * pdf.GetConversionRatio() / 72 * 96
}