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annotate roundup/token_r.py @ 7800:2d4684e4702d

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fix: enhancement to history command output and % template fix. Rather than using the key field, use the label field for descriptions. Call cls.labelprop(default_to_id=True) so it returns id rather than the first sorted property name. If labelprop() returns 'id' or 'title', we return nothing. 'id' means there is no label set and no properties named 'name' or 'title'. So have the caller do whatever it wants (prepend classname for example) when there is no human readable name. This prevents %(name)s%(key)s from producing: 23(23). Also don't accept the 'title' property. Titles can be too long. Arguably we could: '%(name)20s' to limit the title length. However without ellipses or something truncating the title might be confusing. So again pretend there is no human readable name.
author John Rouillard <rouilj@ieee.org>
date Tue, 12 Mar 2024 11:52:17 -0400
parents 07ce4e4110f5
children 9a74dfeb8620
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1 #
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2 # Copyright (c) 2001 Richard Jones, richard@bofh.asn.au.
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3 # This module is free software, and you may redistribute it and/or modify
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4 # under the same terms as Python, so long as this copyright message and
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5 # disclaimer are retained in their original form.
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6 #
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7 # This module is distributed in the hope that it will be useful,
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8 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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9 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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10 #
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11
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12 """This module provides the tokeniser used by roundup-admin.
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13 """
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14 __docformat__ = 'restructuredtext'
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16
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17 def token_split(s, whitespace=' \r\n\t', quotes='\'"',
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18 escaped={'r': '\r', 'n': '\n', 't': '\t'}):
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19 r'''Split the string up into tokens. An occurence of a ``'`` or ``"`` in
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20 the input will cause the splitter to ignore whitespace until a matching
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21 quote char is found. Embedded non-matching quote chars are also skipped.
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22
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23 Whitespace and quoting characters may be escaped using a backslash.
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24 ``\r``, ``\n`` and ``\t`` are converted to carriage-return, newline and
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25 tab. All other backslashed characters are left as-is.
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26
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27 Valid examples::
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28
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29 hello world (2 tokens: hello, world)
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30 "hello world" (1 token: hello world)
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31 "Roch'e" Compaan (2 tokens: Roch'e Compaan)
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32 Roch\'e Compaan (2 tokens: Roch'e Compaan)
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33 address="1 2 3" (1 token: address=1 2 3)
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34 \\ (1 token: \)
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35 \n (1 token: a newline)
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36 \o (1 token: \o)
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37
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38 Invalid examples::
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39
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40 "hello world (no matching quote)
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41 Roch'e Compaan (no matching quote)
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42 '''
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43 l = []
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44 pos = 0
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45 NEWTOKEN = 'newtoken'
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46 TOKEN = 'token'
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47 QUOTE = 'quote'
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48 ESCAPE = 'escape'
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49 quotechar = ''
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50 state = NEWTOKEN
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51 oldstate = '' # one-level state stack ;)
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52 length = len(s)
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53 token = ''
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54 while 1:
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55 # end of string, finish off the current token
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56 if pos == length:
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57 if state == QUOTE: raise ValueError # noqa: E701
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58 elif state == TOKEN: l.append(token) # noqa: E701
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59 break
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60 c = s[pos]
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61 if state == NEWTOKEN:
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62 # looking for a new token
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63 if c in quotes:
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64 # quoted token
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65 state = QUOTE
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66 quotechar = c
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67 pos = pos + 1
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68 continue
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69 elif c in whitespace:
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70 # skip whitespace
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71 pos = pos + 1
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72 continue
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73 elif c == '\\':
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74 pos = pos + 1
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75 oldstate = TOKEN
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76 state = ESCAPE
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77 continue
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78 # otherwise we have a token
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79 state = TOKEN
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80 elif state == TOKEN:
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81 if c in whitespace:
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82 # have a token, and have just found a whitespace terminator
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83 l.append(token)
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84 pos = pos + 1
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85 state = NEWTOKEN
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86 token = ''
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87 continue
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88 elif c in quotes:
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89 # have a token, just found embedded quotes
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90 state = QUOTE
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91 quotechar = c
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92 pos = pos + 1
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93 continue
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94 elif c == '\\':
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95 pos = pos + 1
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96 oldstate = state
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97 state = ESCAPE
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98 continue
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99 elif state == QUOTE and c == quotechar:
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100 # in a quoted token and found a matching quote char
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101 pos = pos + 1
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102 # now we're looking for whitespace
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103 state = TOKEN
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104 continue
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105 elif state == ESCAPE:
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106 # escaped-char conversions (t, r, n)
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107 # TODO: octal, hexdigit
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108 state = oldstate
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109 if c in escaped:
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110 c = escaped[c]
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111 # just add this char to the token and move along
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112 token = token + c
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113 pos = pos + 1
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114 return l
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115
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116 # vim: set filetype=python ts=4 sw=4 et si
Roundup Issue Tracker: http://roundup-tracker.org/