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# Copyright (C) 2011-2019 Patrick Totzke <patricktotzke@gmail.com>
# This file is released under the GNU GPL, version 3 or a later revision.
# For further details see the COPYING file
from .completer import Completer
from .command import CommandCompleter
from ..helper import split_commandline
class CommandLineCompleter(Completer):
"""completes command lines: semicolon separated command strings"""
def __init__(self, dbman, mode, currentbuffer=None):
"""
:param dbman: used to look up available tagstrings
:type dbman: :class:`~alot.db.DBManager`
:param mode: mode identifier
:type mode: str
:param currentbuffer: currently active buffer. If defined, this will be
used to dynamically extract possible completion
strings
:type currentbuffer: :class:`~alot.buffers.Buffer`
"""
self._commandcompleter = CommandCompleter(dbman, mode, currentbuffer)
super().__init__()
@staticmethod
def get_context(line, pos):
"""
computes start and end position of substring of line that is the
command string under given position
"""
commands = split_commandline(line) + ['']
i = 0
start = 0
end = len(commands[i])
while pos > end:
i += 1
start = end + 1
end += 1 + len(commands[i])
return start, end
def complete(self, original, pos):
cstart, cend = self.get_context(original, pos)
before = original[:cstart]
after = original[cend:]
cmdstring = original[cstart:cend]
cpos = pos - cstart
res = []
for ccmd, ccpos in self._commandcompleter.complete(cmdstring, cpos):
newtext = before + ccmd + after
newpos = pos + (ccpos - cpos)
res.append((newtext, newpos))
return res
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