def get_encoding_mode(): """ Get the mode Urwid is using when processing text strings. Returns 'narrow' for 8-bit encodings, 'wide' for CJK encodings or 'utf8' for UTF-8 encodings. """ return str_util.get_byte_encoding()
def process_keyqueue(codes, more_available): """ codes -- list of key codes more_available -- if True then raise MoreInputRequired when in the middle of a character sequence (escape/utf8/wide) and caller will attempt to send more key codes on the next call. returns (list of input, list of remaining key codes). """ code = codes[0] if code >= 32 and code <= 126: key = chr(code) return [key], codes[1:] if _keyconv.has_key(code): return [_keyconv[code]], codes[1:] if code >0 and code <27: return ["ctrl %s" % chr(ord('a')+code-1)], codes[1:] if code >27 and code <32: return ["ctrl %s" % chr(ord('A')+code-1)], codes[1:] em = str_util.get_byte_encoding() if (em == 'wide' and code < 256 and within_double_byte(chr(code),0,0)): if not codes[1:]: if more_available: raise MoreInputRequired() if codes[1:] and codes[1] < 256: db = chr(code)+chr(codes[1]) if within_double_byte(db, 0, 1): return [db], codes[2:] if em == 'utf8' and code>127 and code<256: if code & 0xe0 == 0xc0: # 2-byte form need_more = 1 elif code & 0xf0 == 0xe0: # 3-byte form need_more = 2 elif code & 0xf8 == 0xf0: # 4-byte form need_more = 3 else: return ["<%d>"%code], codes[1:] for i in range(need_more): if len(codes)-1 <= i: if more_available: raise MoreInputRequired() else: return ["<%d>"%code], codes[1:] k = codes[i+1] if k>256 or k&0xc0 != 0x80: return ["<%d>"%code], codes[1:] s = "".join([chr(c)for c in codes[:need_more+1]]) try: return [s.decode("utf-8")], codes[need_more+1:] except UnicodeDecodeError: return ["<%d>"%code], codes[1:] if code >127 and code <256: key = chr(code) return [key], codes[1:] if code != 27: return ["<%d>"%code], codes[1:] result = input_trie.get(codes[1:], more_available) if result is not None: result, remaining_codes = result return [result], remaining_codes if codes[1:]: # Meta keys -- ESC+Key form run, remaining_codes = process_keyqueue(codes[1:], more_available) if run[0] == "esc" or run[0].find("meta ") >= 0: return ['esc']+run, remaining_codes return ['meta '+run[0]]+run[1:], remaining_codes return ['esc'], codes[1:]