ZPL Layout helpers (#328)

Author: agritheory

.pre-commit-config.yaml

@@ -45,7 +45,7 @@ repos:
         additional_dependencies: ['flake8-bugbear']
 
   - repo: https://github.com/agritheory/test_utils
-    rev: v1.18.0
+    rev: v1.19.0
     hooks:
       - id: update_pre_commit_config
       - id: validate_frappe_project

beam/beam/print_format/labelary_print_preview/labelary_print_preview.json

@@ -10,7 +10,7 @@
 	"docstatus": 0,
 	"doctype": "Print Format",
 	"font_size": 14,
-	"html": "<div class=\"zpl-label\">\n<img src=\"data:image/png;base64,{{ labelary_api(doc, 'Handling Unit 6x4 ZPL Format', {}) }}\" />    \n</div>\n",
+	"html": "<div class=\"zpl-label\">\n<img src=\"data:image/png;base64,{{ labelary_api(doc, 'Handling Unit 6x4 ZPL Format', {'width': 6, 'height': 4, 'dpmm': 8}) }}\" />    \n</div>\n",
 	"idx": 0,
 	"line_breaks": 0,
 	"margin_bottom": 15.0,

beam/beam/printing.py

@@ -151,6 +151,18 @@ def labelary_api(doc, print_format, settings=None):
 		e.globals.update(methods)
 	template = e.from_string(print_format.raw_commands)
 	output = template.render(doc=doc)
-	url = "http://api.labelary.com/v1/printers/8dpmm/labels/6x4/0/"
+
+	# Extract label dimensions and DPI from settings
+	# dpmm: dots per millimeter (default 8 = ~203 DPI)
+	# width: label width in inches (default 6)
+	# height: label height in inches (default 4)
+	# index: label index for multi-label formats (default 0)
+	dpmm = settings.get("dpmm", 8)  # 8 dpmm ≈ 203 DPI, 12 dpmm ≈ 300 DPI
+	width = settings.get("width", 6)
+	height = settings.get("height", 4)
+	index = settings.get("index", 0)
+
+	url = f"http://api.labelary.com/v1/printers/{dpmm}dpmm/labels/{width}x{height}/{index}/"
 	r = requests.post(url, files={"file": output})
-	return base64.b64encode(r.content).decode("ascii")
+	content = r.content
+	return base64.b64encode(content).decode("ascii")