Added Generator for Template SVG

internal/svgtemplate/data.go

@@ -0,0 +1,41 @@
+package svgtemplate
+
+// Data holds dynamic values for the SVG mask template.
+type Data struct {
+	Size        float64
+	Bleed       float64
+	Margin      float64
+	Padding     float64
+	ViewBoxMin  float64
+	ViewBoxSize float64
+	MaskSize    float64
+	OuterSize   float64
+	OuterOffset float64
+	InnerSize   float64
+	InnerOffset float64
+	MarkLength  float64
+}
+
+const defaultMarkLength = 6.0 // mm
+
+// Build computes template data from product dimensions.
+func Build(size, bleed, margin, padding float64) Data {
+	offset := bleed + margin + defaultMarkLength
+	viewBoxMin := -offset
+	viewBoxSize := size + (offset * 2)
+
+	return Data{
+		Size:        size,
+		Bleed:       bleed,
+		Margin:      margin,
+		Padding:     padding,
+		ViewBoxMin:  viewBoxMin,
+		ViewBoxSize: viewBoxSize,
+		MarkLength:  defaultMarkLength,
+		MaskSize:    size,
+		OuterSize:   size + (bleed * 2),
+		OuterOffset: -bleed,
+		InnerSize:   size - (padding * 2),
+		InnerOffset: padding,
+	}
+}

internal/svgtemplate/template.go

@@ -0,0 +1,77 @@
+package svgtemplate
+
+import (
+	"io"
+	"os"
+	"path/filepath"
+	"text/template"
+)
+
+const svgTemplate = `<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg xmlns="http://www.w3.org/2000/svg" width="{{.Size}}mm" height="{{.Size}}mm" viewBox="{{.ViewBoxMin}} {{.ViewBoxMin}} {{.ViewBoxSize}} {{.ViewBoxSize}}">
+  <defs>
+    <clipPath id="item-mask">
+      <rect x="0" y="0" width="{{.MaskSize}}" height="{{.MaskSize}}" rx="5" ry="5" />
+    </clipPath>
+  </defs>
+
+  <rect x="{{.ViewBoxMin}}" y="{{.ViewBoxMin}}" width="{{.ViewBoxSize}}" height="{{.ViewBoxSize}}" fill="#f9f9f9" />
+
+  <g clip-path="url(#item-mask)">
+    <rect x="{{.OuterOffset}}" y="{{.OuterOffset}}" width="{{.OuterSize}}" height="{{.OuterSize}}" fill="#00FF00" opacity="0.7" />
+  </g>
+
+  <rect x="{{.InnerOffset}}" y="{{.InnerOffset}}" width="{{.InnerSize}}" height="{{.InnerSize}}" fill="none" stroke="#0000FF" stroke-width="0.3" stroke-dasharray="1,1" />
+
+  <rect x="0" y="0" width="{{.MaskSize}}" height="{{.MaskSize}}" fill="none" stroke="#ccc" stroke-width="0.2" stroke-dasharray="2,2" />
+
+  <g stroke="#000000" stroke-width="0.3">
+    <line x1="0" y1="-{{.Bleed}}" x2="0" y2="-{{appendBleed .Bleed .MarkLength}}" />
+    <line x1="-{{.Bleed}}" y1="0" x2="-{{appendBleed .Bleed .MarkLength}}" y2="0" />
+
+    <line x1="{{.Size}}" y1="-{{.Bleed}}" x2="{{.Size}}" y2="-{{appendBleed .Bleed .MarkLength}}" />
+    <line x1="{{add .Size .Bleed}}" y1="0" x2="{{addThree .Size .Bleed .MarkLength}}" y2="0" />
+
+    <line x1="0" y1="{{add .Size .Bleed}}" x2="0" y2="{{addThree .Size .Bleed .MarkLength}}" />
+    <line x1="-{{.Bleed}}" y1="{{.Size}}" x2="-{{appendBleed .Bleed .MarkLength}}" y2="{{.Size}}" />
+
+    <line x1="{{.Size}}" y1="{{add .Size .Bleed}}" x2="{{.Size}}" y2="{{addThree .Size .Bleed .MarkLength}}" />
+    <line x1="{{add .Size .Bleed}}" y1="{{.Size}}" x2="{{addThree .Size .Bleed .MarkLength}}" y2="{{.Size}}" />
+  </g>
+</svg>
+`
+
+var tmpl = template.Must(
+	template.New("svg").Funcs(template.FuncMap{
+		"appendBleed": func(bleed, mark float64) float64 { return bleed + mark },
+		"add":         func(a, b float64) float64 { return a + b },
+		"addThree":    func(a, b, c float64) float64 { return a + b + c },
+	}).Parse(svgTemplate),
+)
+
+// Write renders the SVG template to w.
+func Write(w io.Writer, data Data) error {
+	return tmpl.Execute(w, data)
+}
+
+// OutputDir is the directory where generated SVG files are written.
+const OutputDir = "svg_template"
+
+// WriteFile renders the SVG template into OutputDir.
+func WriteFile(path string, data Data) error {
+	outPath := filepath.Join(OutputDir, filepath.Base(filepath.Clean(path)))
+	if err := os.MkdirAll(OutputDir, 0o755); err != nil {
+		return err
+	}
+
+	file, err := os.Create(outPath)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	if err := Write(file, data); err != nil {
+		return err
+	}
+	return file.Close()
+}