19.0 vanilla

odoo-bringout-oca-ocb-base/odoo/tools/barcode.py

@@ -1,21 +1,59 @@
-# -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
+import functools
 import re
+from threading import RLock
+
+__all__ = ['check_barcode_encoding', 'createBarcodeDrawing', 'get_barcode_font']
+_barcode_init_lock = RLock()
 
 
-__all__ = ['check_barcode_encoding']
+# A lock occurs when the user wants to print a report having multiple barcode while the server is
+# started in threaded-mode. The reason is that reportlab has to build a cache of the T1 fonts
+# before rendering a barcode (done in a C extension) and this part is not thread safe.
+# This cached functions allows to lazily initialize the T1 fonts cache need for rendering of
+# barcodes in a thread-safe way.
+@functools.lru_cache(1)
+def _init_barcode():
+    with _barcode_init_lock:
+        try:
+            from reportlab.graphics import barcode  # noqa: PLC0415
+            from reportlab.pdfbase.pdfmetrics import TypeFace, getFont  # noqa: PLC0415
+            font_name = 'Courier'
+            available = TypeFace(font_name).findT1File()
+            if not available:
+                substitution_font = 'NimbusMonoPS-Regular'
+                fnt = getFont(substitution_font)
+                if fnt:
+                    font_name = substitution_font
+                    fnt.ascent = 629
+                    fnt.descent = -157
+            barcode.createBarcodeDrawing('Code128', value='foo', format='png', width=100, height=100, humanReadable=1, fontName=font_name).asString('png')
+        except ImportError:
+            raise
+        except Exception:  # noqa: BLE001
+            font_name = 'Courier'
+        return barcode, font_name
 
 
-def get_barcode_check_digit(numeric_barcode):
+def createBarcodeDrawing(codeName: str, **options):
+    barcode, _font = _init_barcode()
+    return barcode.createBarcodeDrawing(codeName, **options)
+
+
+def get_barcode_font():
+    """Get the barcode font for rendering."""
+    _barcode, font = _init_barcode()
+    return font
+
+
+def get_barcode_check_digit(numeric_barcode: str) -> int:
     """ Computes and returns the barcode check digit. The used algorithm
     follows the GTIN specifications and can be used by all compatible
     barcode nomenclature, like as EAN-8, EAN-12 (UPC-A) or EAN-13.
     https://www.gs1.org/sites/default/files/docs/barcodes/GS1_General_Specifications.pdf
     https://www.gs1.org/services/how-calculate-check-digit-manually
     :param numeric_barcode: the barcode to verify/recompute the check digit
-    :type numeric_barcode: str
     :return: the number corresponding to the right check digit
-    :rtype: int
     """
     # Multiply value of each position by
     # N1  N2  N3  N4  N5  N6  N7  N8  N9  N10 N11 N12 N13 N14 N15 N16 N17 N18
@@ -34,10 +72,9 @@ def get_barcode_check_digit(numeric_barcode):
     return (10 - total % 10) % 10
 
 
-def check_barcode_encoding(barcode, encoding):
+def check_barcode_encoding(barcode: str, encoding: str) -> bool:
     """ Checks if the given barcode is correctly encoded.
     :return: True if the barcode string is encoded with the provided encoding.
-    :rtype: bool
     """
     encoding = encoding.lower()
     if encoding == "any":