forked from VimPlug/jedi
moved modules.py -> parser/user_context.py
This commit is contained in:
Dave Halter
177
jedi/parser/user_context.py
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177
jedi/parser/user_context.py
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@@ -0,0 +1,177 @@
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import re
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import sys
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from jedi.cache import underscore_memoization
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from jedi.parser import tokenize
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from jedi import debug
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class UserContext(object):
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"""
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:param source: The source code of the file.
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:param position: The position, the user is currently in. Only important \
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for the main file.
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"""
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def __init__(self, source, position):
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self.source = source
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self.position = position
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self._line_cache = None
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# this two are only used, because there is no nonlocal in Python 2
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self._line_temp = None
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self._relevant_temp = None
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@underscore_memoization
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def get_path_until_cursor(self):
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""" Get the path under the cursor. """
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path, self._start_cursor_pos = self._calc_path_until_cursor(self.position)
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return path
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def _calc_path_until_cursor(self, start_pos=None):
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def fetch_line():
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if self._is_first:
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self._is_first = False
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self._line_length = self._column_temp
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line = self._first_line
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else:
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line = self.get_line(self._line_temp)
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self._line_length = len(line)
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line = line + '\n'
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# add lines with a backslash at the end
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while True:
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self._line_temp -= 1
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last_line = self.get_line(self._line_temp)
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#print self._line_temp, repr(last_line)
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if last_line and last_line[-1] == '\\':
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line = last_line[:-1] + ' ' + line
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self._line_length = len(last_line)
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else:
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break
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return line[::-1]
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self._is_first = True
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self._line_temp, self._column_temp = start_cursor = start_pos
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self._first_line = self.get_line(self._line_temp)[:self._column_temp]
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open_brackets = ['(', '[', '{']
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close_brackets = [')', ']', '}']
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gen = tokenize.generate_tokens(fetch_line)
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string = ''
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level = 0
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force_point = False
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last_type = None
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try:
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for token_type, tok, start, end, line in gen:
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# print 'tok', token_type, tok, force_point
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if last_type == token_type == tokenize.NAME:
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string += ' '
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if level > 0:
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if tok in close_brackets:
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level += 1
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if tok in open_brackets:
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level -= 1
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elif tok == '.':
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force_point = False
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elif force_point:
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# it is reversed, therefore a number is getting recognized
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# as a floating point number
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if token_type == tokenize.NUMBER and tok[0] == '.':
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force_point = False
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else:
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break
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elif tok in close_brackets:
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level += 1
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elif token_type in [tokenize.NAME, tokenize.STRING]:
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force_point = True
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elif token_type == tokenize.NUMBER:
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pass
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else:
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self._column_temp = self._line_length - end[1]
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break
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x = start_pos[0] - end[0] + 1
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l = self.get_line(x)
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l = self._first_line if x == start_pos[0] else l
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start_cursor = x, len(l) - end[1]
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self._column_temp = self._line_length - end[1]
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string += tok
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last_type = token_type
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except tokenize.TokenError:
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debug.warning("Tokenize couldn't finish", sys.exc_info)
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# string can still contain spaces at the end
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return string[::-1].strip(), start_cursor
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def get_path_under_cursor(self):
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"""
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Return the path under the cursor. If there is a rest of the path left,
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it will be added to the stuff before it.
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"""
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return self.get_path_until_cursor() + self.get_path_after_cursor()
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def get_path_after_cursor(self):
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line = self.get_line(self.position[0])
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return re.search("[\w\d]*", line[self.position[1]:]).group(0)
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def get_operator_under_cursor(self):
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line = self.get_line(self.position[0])
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after = re.match("[^\w\s]+", line[self.position[1]:])
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before = re.match("[^\w\s]+", line[:self.position[1]][::-1])
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return (before.group(0) if before is not None else '') \
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+ (after.group(0) if after is not None else '')
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def get_context(self, yield_positions=False):
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pos = self._start_cursor_pos
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while True:
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# remove non important white space
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line = self.get_line(pos[0])
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while True:
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if pos[1] == 0:
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line = self.get_line(pos[0] - 1)
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if line and line[-1] == '\\':
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pos = pos[0] - 1, len(line) - 1
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continue
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else:
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break
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if line[pos[1] - 1].isspace():
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pos = pos[0], pos[1] - 1
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else:
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break
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try:
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result, pos = self._calc_path_until_cursor(start_pos=pos)
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if yield_positions:
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yield pos
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else:
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yield result
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except StopIteration:
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if yield_positions:
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yield None
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else:
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yield ''
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def get_line(self, line_nr):
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if not self._line_cache:
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self._line_cache = self.source.splitlines()
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if self.source:
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if self.source[-1] == '\n':
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self._line_cache.append('')
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else: # ''.splitlines() == []
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self._line_cache = ['']
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if line_nr == 0:
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# This is a fix for the zeroth line. We need a newline there, for
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# the backwards parser.
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return ''
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if line_nr < 0:
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raise StopIteration()
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try:
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return self._line_cache[line_nr - 1]
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except IndexError:
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raise StopIteration()
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def get_position_line(self):
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return self.get_line(self.position[0])[:self.position[1]]
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