def encode_katakana(text):
"""I don't think this quite works yet."""
encoded = []
for char in text:
if jcconv:
# try to convert japanese text to half-katakanas
char = jcconv.kata2half(jcconv.hira2kata(char))
# TODO: "the conversion may result in multiple characters"
# When? What should we do about it?
if char in TXT_ENC_KATAKANA_MAP:
encoded.append(TXT_ENC_KATAKANA_MAP[char])
else:
pass
return b"".join(encoded)
def encode_char(char):
"""
Encodes a single utf-8 character into a sequence of
esc-pos code page change instructions and character declarations
"""
char_utf8 = char.encode('utf-8')
encoded = ''
encoding = self.encoding # we reuse the last encoding to prevent code page switches at every character
encodings = {
# TODO use ordering to prevent useless switches
# TODO Support other encodings not natively supported by python ( Thai, Khazakh, Kanjis )
'cp437': TXT_ENC_PC437,
'cp850': TXT_ENC_PC850,
'cp852': TXT_ENC_PC852,
'cp857': TXT_ENC_PC857,
'cp858': TXT_ENC_PC858,
'cp860': TXT_ENC_PC860,
'cp863': TXT_ENC_PC863,
'cp865': TXT_ENC_PC865,
'cp866': TXT_ENC_PC866,
'cp862': TXT_ENC_PC862,
'cp720': TXT_ENC_PC720,
'iso8859_2': TXT_ENC_8859_2,
'iso8859_7': TXT_ENC_8859_7,
'iso8859_9': TXT_ENC_8859_9,
'cp1254' : TXT_ENC_WPC1254,
'cp1255' : TXT_ENC_WPC1255,
'cp1256' : TXT_ENC_WPC1256,
'cp1257' : TXT_ENC_WPC1257,
'cp1258' : TXT_ENC_WPC1258,
'katakana' : TXT_ENC_KATAKANA,
}
remaining = copy.copy(encodings)
if not encoding :
encoding = 'cp437'
while True: # Trying all encoding until one succeeds
try:
if encoding == 'katakana': # Japanese characters
if jcconv:
# try to convert japanese text to a half-katakanas
kata = jcconv.kata2half(jcconv.hira2kata(char_utf8))
if kata != char_utf8:
self.extra_chars += len(kata.decode('utf-8')) - 1
# the conversion may result in multiple characters
return encode_str(kata.decode('utf-8'))
else:
kata = char_utf8
if kata in TXT_ENC_KATAKANA_MAP:
encoded = TXT_ENC_KATAKANA_MAP[kata]
break
else:
raise ValueError()
else:
encoded = char.encode(encoding)
break
except ValueError: #the encoding failed, select another one and retry
if encoding in remaining:
del remaining[encoding]
if len(remaining) >= 1:
encoding = remaining.items()[0][0]
else:
encoding = 'cp437'
encoded = '\xb1' # could not encode, output error character
break;
if encoding != self.encoding:
# if the encoding changed, remember it and prefix the character with
# the esc-pos encoding change sequence
self.encoding = encoding
encoded = encodings[encoding] + encoded
return encoded
def encode_char(char):
"""
Encodes a single utf-8 character into a sequence of
esc-pos code page change instructions and character declarations
"""
char_utf8 = char.encode('utf-8')
encoded = ''
encoding = self.encoding # we reuse the last encoding to prevent code page switches at every character
encodings = {
# TODO use ordering to prevent useless switches
# TODO Support other encodings not natively supported by python ( Thai, Khazakh, Kanjis )
'cp437': TXT_ENC_PC437,
'cp850': TXT_ENC_PC850,
'cp852': TXT_ENC_PC852,
'cp857': TXT_ENC_PC857,
'cp858': TXT_ENC_PC858,
'cp860': TXT_ENC_PC860,
'cp863': TXT_ENC_PC863,
'cp865': TXT_ENC_PC865,
'cp1251':
TXT_ENC_WPC1251, # win-1251 covers more cyrillic symbols than cp866
'cp866': TXT_ENC_PC866,
'cp862': TXT_ENC_PC862,
'cp720': TXT_ENC_PC720,
'cp936': TXT_ENC_PC936,
'iso8859_2': TXT_ENC_8859_2,
'iso8859_7': TXT_ENC_8859_7,
'iso8859_9': TXT_ENC_8859_9,
'cp1254': TXT_ENC_WPC1254,
'cp1255': TXT_ENC_WPC1255,
'cp1256': TXT_ENC_WPC1256,
'cp1257': TXT_ENC_WPC1257,
'cp1258': TXT_ENC_WPC1258,
'katakana': TXT_ENC_KATAKANA,
}
remaining = copy.copy(encodings)
if not encoding:
encoding = 'cp437'
while True: # Trying all encoding until one succeeds
try:
if encoding == 'katakana': # Japanese characters
if jcconv:
# try to convert japanese text to a half-katakanas
kata = jcconv.kata2half(
jcconv.hira2kata(char_utf8))
if kata != char_utf8:
self.extra_chars += len(
kata.decode('utf-8')) - 1
# the conversion may result in multiple characters
return encode_str(kata.decode('utf-8'))
else:
kata = char_utf8
if kata in TXT_ENC_KATAKANA_MAP:
encoded = TXT_ENC_KATAKANA_MAP[kata]
break
else:
raise ValueError()
else:
# First 127 symbols are covered by cp437.
# Extended range is covered by different encodings.
encoded = char.encode(encoding)
if ord(encoded) <= 127:
encoding = 'cp437'
break
except (UnicodeEncodeError, UnicodeWarning, TypeError,
ValueError):
#the encoding failed, select another one and retry
if encoding in remaining:
del remaining[encoding]
if len(remaining) >= 1:
(encoding, _) = remaining.popitem()
else:
encoding = 'cp437'
encoded = b'\xb1' # could not encode, output error character
break
if encoding != self.encoding:
# if the encoding changed, remember it and prefix the character with
# the esc-pos encoding change sequence
self.encoding = encoding
encoded = bytes(encodings[encoding], 'utf-8') + encoded
return encoded
def translate(self, text):
yomi = self._yomi(text).encode("utf-8")
yomi = self._ondulish.parse(yomi)
return jcconv.kata2half(yomi.decode("utf-8"))
