def cql_complete_single()

in cqlsh-expansion/pylib/cqlshlib/cqlhandling.py [0:0]

• 56 lines of code
• 18 McCabe index (conditional complexity)

    def cql_complete_single(self, text, partial, init_bindings={}, ignore_case=True,
                            startsymbol='Start'):
        tokens = (self.cql_split_statements(text)[0] or [[]])[-1]
        bindings = init_bindings.copy()

        # handle some different completion scenarios- in particular, completing
        # inside a string literal
        prefix = None
        dequoter = util.identity
        lasttype = None
        if tokens:
            lasttype = tokens[-1][0]
            if lasttype == 'unclosedString':
                prefix = self.token_dequote(tokens[-1])
                tokens = tokens[:-1]
                partial = prefix + partial
                dequoter = self.dequote_value
                requoter = self.escape_value
            elif lasttype == 'unclosedName':
                prefix = self.token_dequote(tokens[-1])
                tokens = tokens[:-1]
                partial = prefix + partial
                dequoter = self.dequote_name
                requoter = self.escape_name
            elif lasttype == 'unclosedComment':
                return []
        bindings['partial'] = partial
        bindings['*LASTTYPE*'] = lasttype
        bindings['*SRC*'] = text

        # find completions for the position
        completions = self.complete(startsymbol, tokens, bindings)

        hints, strcompletes = util.list_bifilter(pylexotron.is_hint, completions)

        # it's possible to get a newline token from completion; of course, we
        # don't want to actually have that be a candidate, we just want to hint
        if '\n' in strcompletes:
            strcompletes.remove('\n')
            if partial == '':
                hints.append(Hint('<enter>'))

        # find matches with the partial word under completion
        if ignore_case:
            partial = partial.lower()
            f = lambda s: s and dequoter(s).lower().startswith(partial)
        else:
            f = lambda s: s and dequoter(s).startswith(partial)
        candidates = filter(f, strcompletes)

        if prefix is not None:
            # dequote, re-escape, strip quotes: gets us the right quoted text
            # for completion. the opening quote is already there on the command
            # line and not part of the word under completion, and readline
            # fills in the closing quote for us.
            candidates = [requoter(dequoter(c))[len(prefix) + 1:-1] for c in candidates]

            # the above process can result in an empty string; this doesn't help for
            # completions
            candidates = filter(None, candidates)

        # prefix a space when desirable for pleasant cql formatting
        if tokens:
            newcandidates = []
            for c in candidates:
                if self.want_space_between(tokens[-1], c) \
                        and prefix is None \
                        and not text[-1].isspace() \
                        and not c[0].isspace():
                    c = ' ' + c
                newcandidates.append(c)
            candidates = newcandidates

        # append a space for single, complete identifiers
        if len(candidates) == 1 and candidates[0][-1].isalnum()  \
                and lasttype != 'unclosedString' \
                and lasttype != 'unclosedName':
            candidates[0] += ' '
        return candidates, hints