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https://github.com/python-escpos/python-escpos
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add automatic codepage-changing
This code is adapted from the works by Frédéric Van der Essen in pyxmlescpos. I had to adapt the code completely in order to make it compatible with modern unicode-handling Further changes: * improve text unittests in CLI and MagicEncode with hypothesis * add feature force_encoding in order to enable old behaviour * disable cli_text_test (for now) * fix charcode(): it does now cooperate with the new structure * remove redundant variable codepage from class Escpos
This commit is contained in:
Patrick Kanzler
committed by
Patrick Kanzler
Patrick Kanzler
parent
b0af9e9652
commit
0cfedb5706
@@ -20,6 +20,7 @@ import textwrap
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from .constants import *
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from .exceptions import *
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from .magicencode import MagicEncode
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from abc import ABCMeta, abstractmethod # abstract base class support
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from escpos.image import EscposImage
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@@ -33,13 +34,13 @@ class Escpos(object):
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class.
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"""
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device = None
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codepage = None
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def __init__(self, columns=32):
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def __init__(self, columns=32, **kwargs):
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""" Initialize ESCPOS Printer
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:param columns: Text columns used by the printer. Defaults to 32."""
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self.columns = columns
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self.magic = MagicEncode(**kwargs)
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def __del__(self):
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""" call self.close upon deletion """
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@@ -203,82 +204,21 @@ class Escpos(object):
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inp_number //= 256
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return outp
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def charcode(self, code):
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def charcode(self, code="AUTO"):
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""" Set Character Code Table
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Sends the control sequence from :py:mod:`escpos.constants` to the printer
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with :py:meth:`escpos.printer.'implementation'._raw()`.
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Sets the control sequence from ``CHARCODE`` in :py:mod:`escpos.constants` as active. It will be sent with
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the next text sequence. If you set the variable code to ``AUTO`` it will try to automatically guess the
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right codepage. (This is the standard behaviour.)
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:param code: Name of CharCode
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:raises: :py:exc:`~escpos.exceptions.CharCodeError`
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"""
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# TODO improve this (rather unhandy code)
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# TODO check the codepages
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if code.upper() == "USA":
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self._raw(CHARCODE_PC437)
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self.codepage = 'cp437'
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elif code.upper() == "JIS":
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self._raw(CHARCODE_JIS)
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self.codepage = 'cp932'
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elif code.upper() == "MULTILINGUAL":
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self._raw(CHARCODE_PC850)
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self.codepage = 'cp850'
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elif code.upper() == "PORTUGUESE":
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self._raw(CHARCODE_PC860)
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self.codepage = 'cp860'
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elif code.upper() == "CA_FRENCH":
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self._raw(CHARCODE_PC863)
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self.codepage = 'cp863'
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elif code.upper() == "NORDIC":
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self._raw(CHARCODE_PC865)
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self.codepage = 'cp865'
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elif code.upper() == "WEST_EUROPE":
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self._raw(CHARCODE_WEU)
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self.codepage = 'latin_1'
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elif code.upper() == "GREEK":
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self._raw(CHARCODE_GREEK)
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self.codepage = 'cp737'
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elif code.upper() == "HEBREW":
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self._raw(CHARCODE_HEBREW)
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self.codepage = 'cp862'
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# elif code.upper() == "LATVIAN": # this is not listed in the constants
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# self._raw(CHARCODE_PC755)
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# self.codepage = 'cp'
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elif code.upper() == "WPC1252":
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self._raw(CHARCODE_PC1252)
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self.codepage = 'cp1252'
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elif code.upper() == "CIRILLIC2":
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self._raw(CHARCODE_PC866)
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self.codepage = 'cp866'
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elif code.upper() == "LATIN2":
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self._raw(CHARCODE_PC852)
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self.codepage = 'cp852'
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elif code.upper() == "EURO":
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self._raw(CHARCODE_PC858)
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self.codepage = 'cp858'
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elif code.upper() == "THAI42":
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self._raw(CHARCODE_THAI42)
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self.codepage = 'cp874'
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elif code.upper() == "THAI11":
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self._raw(CHARCODE_THAI11)
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self.codepage = 'cp874'
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elif code.upper() == "THAI13":
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self._raw(CHARCODE_THAI13)
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self.codepage = 'cp874'
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elif code.upper() == "THAI14":
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self._raw(CHARCODE_THAI14)
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self.codepage = 'cp874'
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elif code.upper() == "THAI16":
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self._raw(CHARCODE_THAI16)
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self.codepage = 'cp874'
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elif code.upper() == "THAI17":
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self._raw(CHARCODE_THAI17)
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self.codepage = 'cp874'
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elif code.upper() == "THAI18":
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self._raw(CHARCODE_THAI18)
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self.codepage = 'cp874'
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if code.upper() == "AUTO":
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self.magic.force_encoding = False
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else:
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raise CharCodeError()
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self.magic.encoding = self.magic.codepage_sequence(code)
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self.magic.force_encoding = True
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def barcode(self, code, bc, height=64, width=3, pos="BELOW", font="A", align_ct=True, function_type="A"):
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""" Print Barcode
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@@ -418,14 +358,8 @@ class Escpos(object):
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:param txt: text to be printed
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:raises: :py:exc:`~escpos.exceptions.TextError`
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"""
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if txt:
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if self.codepage:
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self._raw(txt.encode(self.codepage))
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else:
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self._raw(txt.encode())
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else:
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# TODO: why is it problematic to print an empty string?
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raise TextError()
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txt = six.text_type(txt)
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self._raw(self.magic.encode_text(txt=txt))
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def block_text(self, txt, columns=None):
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""" Text is printed wrapped to specified columns
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