# -*- coding: utf-8 -*-
#*****************************************************************************
#       Copyright (C) 2003-2006 Gary Bishop.
#       Copyright (C) 2006  Jorgen Stenarson. <jorgen.stenarson@bostream.nu>
#
#  Distributed under the terms of the BSD License.  The full license is in
#  the file COPYING, distributed as part of this software.
#*****************************************************************************
# table for translating virtual keys to X windows key symbols
from __future__ import print_function, unicode_literals, absolute_import

try:
    set
except NameError:
    from sets import Set as set
    
from pyreadline.unicode_helper import ensure_unicode

validkey =set(['cancel',      'backspace',    'tab',          'clear',
               'return',      'shift_l',      'control_l',    'alt_l',
               'pause',       'caps_lock',    'escape',       'space',
               'prior',       'next',         'end',          'home',
               'left',        'up',           'right',        'down',
               'select',      'print',        'execute',      'snapshot',
               'insert',      'delete',       'help',         'f1',
               'f2',          'f3',           'f4',           'f5',
               'f6',          'f7',           'f8',           'f9',
               'f10',         'f11',          'f12',          'f13',
               'f14',         'f15',          'f16',          'f17',
               'f18',         'f19',          'f20',          'f21',
               'f22',         'f23',          'f24',          'num_lock',
               'scroll_lock', 'vk_apps',      'vk_processkey','vk_attn',
               'vk_crsel',    'vk_exsel',     'vk_ereof',     'vk_play',
               'vk_zoom',     'vk_noname',    'vk_pa1',       'vk_oem_clear',
               'numpad0',     'numpad1',      'numpad2',      'numpad3',
               'numpad4',     'numpad5',      'numpad6',      'numpad7',
               'numpad8',     'numpad9',      'divide',       'multiply',
               'add',         'subtract',     'vk_decimal'])

escape_sequence_to_special_key = {"\\e[a" : "up", "\\e[b" : "down", "del" : "delete"}

class KeyPress(object):
    def __init__(self, char="", shift=False, control=False, meta=False, keyname=""):
        if control or meta or shift:
            char = char.upper()
        self.info = dict(char=char,
                         shift=shift,
                         control=control,
                         meta=meta,
                         keyname=keyname)
        
    def create(name):
        def get(self):
            return self.info[name]

        def set(self, value):
            self.info[name] = value
        return property(get, set)
    char = create("char")
    shift = create("shift")
    control = create("control")
    meta = create("meta")
    keyname = create("keyname")
        
    def __repr__(self):
        return "(%s,%s,%s,%s)"%tuple(map(ensure_unicode, self.tuple()))

    def tuple(self):
        if self.keyname:
            return (self.control, self.meta, self.shift, self.keyname)
        else:
            if self.control or self.meta or self.shift:
                return (self.control, self.meta, self.shift, self.char.upper())
            else:
                return (self.control, self.meta, self.shift, self.char)

    def __eq__(self, other):
        if isinstance(other, KeyPress):
            s = self.tuple()
            o = other.tuple()
            return s == o
        else:
            return False

def make_KeyPress_from_keydescr(keydescr):
    keyinfo = KeyPress()
    if len(keydescr) > 2 and keydescr[:1] == '"' and keydescr[-1:] == '"':
        keydescr = keydescr[1:-1]
        
    while 1:
        lkeyname = keydescr.lower()
        if lkeyname.startswith('control-'):
            keyinfo.control = True
            keydescr = keydescr[8:]
        elif lkeyname.startswith('ctrl-'):
            keyinfo.control = True
            keydescr = keydescr[5:]
        elif keydescr.lower().startswith('\\c-'):
            keyinfo.control = True
            keydescr = keydescr[3:]
        elif keydescr.lower().startswith('\\m-'):
            keyinfo.meta = True
            keydescr = keydescr[3:]
        elif keydescr in escape_sequence_to_special_key:
            keydescr = escape_sequence_to_special_key[keydescr]
        elif lkeyname.startswith('meta-'):
            keyinfo.meta = True
            keydescr = keydescr[5:]
        elif lkeyname.startswith('alt-'):
            keyinfo.meta = True
            keydescr = keydescr[4:]
        elif lkeyname.startswith('shift-'):
            keyinfo.shift = True
            keydescr = keydescr[6:]
        else:
            if len(keydescr) > 1:
                if keydescr.strip().lower() in validkey:
                    keyinfo.keyname = keydescr.strip().lower()
                    keyinfo.char = ""
                else:
                    raise IndexError("Not a valid key: '%s'"%keydescr)
            else:
                keyinfo.char = keydescr
            return keyinfo

if __name__ == "__main__":
    import startup