""" encoding.py - character transcoding support for Mercurial Copyright 2005-2009 Matt Mackall and others This software may be used and distributed according to the terms of the GNU General Public License version 2, incorporated herein by reference. """ import sys, unicodedata, locale, os, error _encodingfixup = {'646': 'ascii', 'ANSI_X3.4-1968': 'ascii'} try: encoding = os.environ.get("HGENCODING") if sys.platform == 'darwin' and not encoding: # On darwin, getpreferredencoding ignores the locale environment and # always returns mac-roman. We override this if the environment is # not C (has been customized by the user). locale.setlocale(locale.LC_CTYPE, '') encoding = locale.getlocale()[1] if not encoding: encoding = locale.getpreferredencoding() or 'ascii' encoding = _encodingfixup.get(encoding, encoding) except locale.Error: encoding = 'ascii' encodingmode = os.environ.get("HGENCODINGMODE", "strict") fallbackencoding = 'ISO-8859-1' def tolocal(s): """ Convert a string from internal UTF-8 to local encoding All internal strings should be UTF-8 but some repos before the implementation of locale support may contain latin1 or possibly other character sets. We attempt to decode everything strictly using UTF-8, then Latin-1, and failing that, we use UTF-8 and replace unknown characters. """ for e in ('UTF-8', fallbackencoding): try: u = s.decode(e) # attempt strict decoding return u.encode(encoding, "replace") except LookupError, k: raise error.Abort("%s, please check your locale settings" % k) except UnicodeDecodeError: pass u = s.decode("utf-8", "replace") # last ditch return u.encode(encoding, "replace") def fromlocal(s): """ Convert a string from the local character encoding to UTF-8 We attempt to decode strings using the encoding mode set by HGENCODINGMODE, which defaults to 'strict'. In this mode, unknown characters will cause an error message. Other modes include 'replace', which replaces unknown characters with a special Unicode character, and 'ignore', which drops the character. """ try: return s.decode(encoding, encodingmode).encode("utf-8") except UnicodeDecodeError, inst: sub = s[max(0, inst.start-10):inst.start+10] raise error.Abort("decoding near '%s': %s!" % (sub, inst)) except LookupError, k: raise error.Abort("%s, please check your locale settings" % k) def colwidth(s): "Find the column width of a UTF-8 string for display" d = s.decode(encoding, 'replace') if hasattr(unicodedata, 'east_asian_width'): w = unicodedata.east_asian_width return sum([w(c) in 'WF' and 2 or 1 for c in d]) return len(d)