terminator/terminatorlib/configfile.py
Thomas Hurst 769b86119b Handle trailing spaces in configs properly; don't make them part of the value.
Handle unquoted palette values.  Parse errors will occur if they're not exact.
2008-08-21 21:57:59 +01:00

137 lines
3.9 KiB
Python

#!/usr/local/bin/python
import re
from terminatorlib.config import dbg, debug
def group(*choices): return '(' + '|'.join(choices) + ')'
def any(*choices): return group(*choices) + '*'
def maybe(*choices): return group(*choices) + '?'
Newline = re.compile(r'[\r\n]+')
Whitespace = r'[ \f\t]*'
Comment = r'#[^\r\n]*'
Ignore = re.compile(Whitespace + maybe(Comment) + maybe(r'[\r\n]+') + '$')
WhitespaceRE = re.compile(Whitespace)
CommentRE = re.compile(Comment)
QuotedStrings = {"'": re.compile(r"'([^'\r\n]*)'"), '"': re.compile(r'"([^"\r\n]*)"')}
Section = re.compile(r"\[([^\r\n\]]+)\][ \f\t]*")
Setting = re.compile(r"(\w+)\s*=\s*")
PaletteColours = '(?:#[0-9a-fA-F]{12}:){15}#[0-9a-fA-F]{12}'
SingleColour = '#[0-9a-fA-F]{6}|#[0-9a-fA-F]{3}'
Colourvalue = re.compile(group(PaletteColours, SingleColour))
Barevalue = re.compile(r'((?:[^\r\n# \f\t]+|[^\r\n#]+(?!' + Ignore.pattern +'))+)')
Tabsize = 8
class ConfigSyntaxError(Exception):
def __init__(self, message, cf):
self.message = message
self.file = cf.filename
self.lnum = cf._lnum
self.pos = cf._pos
self.line = cf._line
def __str__(self):
return "File %s line %d:\n %s\n %s^\n%s" % (repr(self.file), self.lnum,
self.line.rstrip(),
' ' * self.pos, self.message)
class ConfigFile:
def __init__(self, filename = None):
self.filename = filename
self.settings = {}
def _call_if_match(self, re, callable, group = 0):
if self._pos == self._max:
return False
mo = re.match(self._line, self._pos)
if mo:
if callable:
callable(mo.group(group))
self._pos = mo.end()
return True
else:
return False
def _call_if_quoted_string(self, callable):
if self._pos == self._max:
return False
chr = self._line[self._pos]
if chr in '"\'':
string = ''
while True:
mo = QuotedStrings[chr].match(self._line, self._pos)
if mo is None:
raise ConfigSyntaxError("Unterminated quoted string", self)
self._pos = mo.end()
if self._line[self._pos - 2] == '\\':
string += mo.group(1)[0:-1] + chr
self._pos -= 1
else:
string += mo.group(1)
break
callable(string)
return True
else:
return False
def parse(self):
file = open(self.filename)
rc = file.readlines()
file.close()
self._indents = [0]
self._pos = 0
self._max = 0
self._lnum = 0
self._line = ''
self._currsection = None
self._cursetting = None
for self._line in rc:
self._lnum += 1
self._pos = 0
self._max = len(self._line)
dbg("Line %d: %s" % (self._lnum, repr(self._line)))
self._call_if_match(WhitespaceRE, None)
# [Section]
self._call_if_match(Section, self._section, 1)
# setting =
if self._call_if_match(Setting, self._setting, 1):
# "quoted value"
if not self._call_if_quoted_string(self._value):
# #000000 # colour that would otherwise be a comment
if not self._call_if_match(Colourvalue, self._value, 1):
# bare value
if not self._call_if_match(Barevalue, self._value, 1):
raise ConfigSyntaxError("Setting without a value", self)
self._call_if_match(Ignore, lambda junk: dbg("Ignoring: %s" % junk))
if self._line[self._pos:] != '':
raise ConfigSyntaxError("Unexpected token", self)
def _section(self, section):
dbg("Section %s" % repr(section))
self._currsection = section.lower()
def _setting(self, setting):
dbg("Setting %s" % repr(setting))
self._currsetting = setting.lower()
def _value(self, value):
dbg("Value %s" % repr(value))
if self._currsection is not None:
self.settings.setdefault(self._currsection, {})[self._currsetting] = value
else:
self.settings[self._currsetting] = value