1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
|
# Pluma snippets plugin
# Copyright (C) 2006-2007 Jesse van den Kieboom <jesse@icecrew.nl>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import os
import re
import sys
from SubstitutionParser import SubstitutionParser
class Token:
def __init__(self, klass, data):
self.klass = klass
self.data = data
def __str__(self):
return '%s: [%s]' % (self.klass, self.data)
def __eq__(self, other):
return self.klass == other.klass and self.data == other.data
def __ne__(self, other):
return not self.__eq__(other)
class Parser:
SREG_ENV = '[A-Z_]+'
SREG_ID = '[0-9]+'
REG_ESCAPE = re.compile('(\\$(%s|\\(|\\{|<|%s)|`|\\\\)' % (SREG_ENV, SREG_ID))
def __init__(self, **kwargs):
for k, v in kwargs.items():
setattr(self, k, v)
self.position = 0
self.data_length = len(self.data)
self.RULES = (self._match_env, self._match_regex, self._match_placeholder, self._match_shell, self._match_eval, self._text)
def remains(self):
return self.data[self.position:]
def next_char(self):
if self.position + 1 >= self.data_length:
return ''
else:
return self.data[self.position + 1]
def char(self):
if self.position >= self.data_length:
return ''
else:
return self.data[self.position]
def token(self):
self.tktext = ''
while self.position < self.data_length:
try:
# Get first character
func = {'$': self._rule,
'`': self._try_match_shell}[self.char()]
except:
func = self._text
# Detect end of text token
if func != self._text and self.tktext != '':
return Token('text', self.tktext)
tk = func()
if tk:
return tk
if self.tktext != '':
return Token('text', self.tktext)
def _need_escape(self):
text = self.remains()[1:]
if text == '':
return False
return self.REG_ESCAPE.match(text)
def _escape(self):
if not self._need_escape():
return
# Increase position with 1
self.position += 1
def _text(self):
if self.char() == '\\':
self._escape()
self.tktext += self.char()
self.position += 1
def _rule(self):
for rule in self.RULES:
res = rule()
if res:
return res
def _match_env(self):
text = self.remains()
match = re.match('\\$(%s)' % self.SREG_ENV, text) or re.match('\\${(%s)}' % self.SREG_ENV, text)
if match:
self.position += len(match.group(0))
return Token('environment', match.group(1))
def _parse_list(self, lst):
pos = 0
length = len(lst)
items = []
last = None
while pos < length:
char = lst[pos]
next = pos < length - 1 and lst[pos + 1]
if char == '\\' and (next == ',' or next == ']'):
char = next
pos += 1
elif char == ',':
if last != None:
items.append(last)
last = None
pos += 1
continue
last = (last != None and last + char) or char
pos += 1
if last != None:
items.append(last)
return items
def _parse_default(self, default):
match = re.match('^\\s*(\\\\)?(\\[((\\\\]|[^\\]])+)\\]\\s*)$', default)
if not match:
return [default]
groups = match.groups()
if groups[0]:
return [groups[1]]
return self._parse_list(groups[2])
def _match_placeholder(self):
text = self.remains()
match = re.match('\\${(%s)(:((\\\\\\}|[^}])+))?}' % self.SREG_ID, text) or re.match('\\$(%s)' % self.SREG_ID, text)
if not match:
return None
groups = match.groups()
default = ''
tabstop = int(groups[0])
self.position += len(match.group(0))
if len(groups) > 1 and groups[2]:
default = self._parse_default(groups[2].replace('\\}', '}'))
return Token('placeholder', {'tabstop': tabstop, 'default': default})
def _match_shell(self):
text = self.remains()
match = re.match('`((%s):)?((\\\\`|[^`])+?)`' % self.SREG_ID, text) or re.match('\\$\\(((%s):)?((\\\\\\)|[^\\)])+?)\\)' % self.SREG_ID, text)
if not match:
return None
groups = match.groups()
tabstop = (groups[1] and int(groups[1])) or -1
self.position += len(match.group(0))
if text[0] == '`':
contents = groups[2].replace('\\`', '`')
else:
contents = groups[2].replace('\\)', ')')
return Token('shell', {'tabstop': tabstop, 'contents': contents})
def _try_match_shell(self):
return self._match_shell() or self._text()
def _eval_options(self, options):
reg = re.compile(self.SREG_ID)
tabstop = -1
depend = []
options = options.split(':')
for opt in options:
if reg.match(opt):
tabstop = int(opt)
else:
depend += self._parse_list(opt[1:-1])
return (tabstop, depend)
def _match_eval(self):
text = self.remains()
options = '((%s)|\\[([0-9, ]+)\\])' % self.SREG_ID
match = re.match('\\$<((%s:)*)((\\\\>|[^>])+?)>' % options, text)
if not match:
return None
groups = match.groups()
(tabstop, depend) = (groups[0] and self._eval_options(groups[0][:-1])) or (-1, [])
self.position += len(match.group(0))
return Token('eval', {'tabstop': tabstop, 'dependencies': depend, 'contents': groups[5].replace('\\>', '>')})
def _match_regex(self):
text = self.remains()
content = '((?:\\\\[/]|\\\\}|[^/}])+)'
match = re.match('\\${(?:(%s):)?\\s*(%s|\\$([A-Z_]+))?[/]%s[/]%s(?:[/]([a-zA-Z]*))?}' % (self.SREG_ID, self.SREG_ID, content, content), text)
if not match:
return None
groups = match.groups()
tabstop = (groups[0] and int(groups[0])) or -1
inp = (groups[2] or (groups[1] and int(groups[1]))) or ''
pattern = re.sub('\\\\([/}])', '\\1', groups[3])
substitution = re.sub('\\\\([/}])', '\\1', groups[4])
modifiers = groups[5] or ''
self.position += len(match.group(0))
return Token('regex', {'tabstop': tabstop, 'input': inp, 'pattern': pattern, 'substitution': substitution, 'modifiers': modifiers})
# ex:ts=4:et:
|