76 lines
2.5 KiB
Python
76 lines
2.5 KiB
Python
# Copyright 2010 Le Coz Florent <louizatakk@fedoraproject.org>
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#
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# This file is part of Poezio.
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#
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# Poezio is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, version 3 of the License.
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#
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# Poezio is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Poezio. If not, see <http://www.gnu.org/licenses/>.
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"""
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Functions to interact with the keyboard
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Mainly, read keys entered and return a string (most
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of the time ONE char, but may be longer if it's a keyboard
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shortcut, like ^A, M-a or KEY_RESIZE)
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"""
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def get_next_byte(s):
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"""
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Read the next byte of the utf-8 char
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ncurses seems to return a string of the byte
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encoded in latin-1. So what we get is NOT what we typed
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unless we do the conversion…
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"""
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try:
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c = s.getkey()
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except:
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return (None, "KEY_RESIZE")
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if len(c) >= 4:
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return (None, c)
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return (ord(c), c.encode('latin-1')) # returns a number and a bytes object
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def read_char(s):
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"""
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Read one utf-8 char
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see http://en.wikipedia.org/wiki/UTF-8#Description
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"""
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(first, char) = get_next_byte(s)
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if not isinstance(first, int): # Keyboard special, like KEY_HOME etc
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return char
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if first == 127 or first == 8:
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return "KEY_BACKSPACE"
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if first < 127: # ASCII char on one byte
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if first <= 26: # transform Ctrl+* keys
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return "^"+chr(first + 64)
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if first == 27:
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(first, c) = get_next_byte(s)
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if not isinstance(first, int): # Keyboard special, like KEY_HOME etc
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return char
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return "M-"+chr(first)
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if 194 <= first:
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(code, c) = get_next_byte(s) # 2 bytes char
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char += c
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if 224 <= first:
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(code, c) = get_next_byte(s) # 3 bytes char
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char += c
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if 240 <= first:
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(code, c) = get_next_byte(s) # 4 bytes char
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char += c
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try:
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return char.decode('utf-8') # return all the concatened byte objets, decoded
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except UnicodeDecodeError:
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return None
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if __name__ == '__main__':
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import curses
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s = curses.initscr()
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curses.noecho()
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while True:
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s.addstr('%s\n' % read_char(s))
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