| 103 | |
| 104 | @dataclass(kw_only=True) |
| 105 | class ReadlineAlikeReader(historical_reader.HistoricalReader, CompletingReader): |
| 106 | # Class fields |
| 107 | assume_immutable_completions = False |
| 108 | use_brackets = False |
| 109 | sort_in_column = True |
| 110 | |
| 111 | # Instance fields |
| 112 | config: ReadlineConfig |
| 113 | more_lines: MoreLinesCallable | None = None |
| 114 | last_used_indentation: str | None = None |
| 115 | |
| 116 | def __post_init__(self) -> None: |
| 117 | super().__post_init__() |
| 118 | self.commands["maybe_accept"] = maybe_accept |
| 119 | self.commands["maybe-accept"] = maybe_accept |
| 120 | self.commands["backspace_dedent"] = backspace_dedent |
| 121 | self.commands["backspace-dedent"] = backspace_dedent |
| 122 | |
| 123 | def error(self, msg: str = "none") -> None: |
| 124 | pass # don't show error messages by default |
| 125 | |
| 126 | def get_stem(self) -> str: |
| 127 | b = self.buffer |
| 128 | p = self.pos - 1 |
| 129 | completer_delims = self.config.completer_delims |
| 130 | while p >= 0 and b[p] not in completer_delims: |
| 131 | p -= 1 |
| 132 | return "".join(b[p + 1 : self.pos]) |
| 133 | |
| 134 | def get_completions(self, stem: str) -> list[str]: |
| 135 | if len(stem) == 0 and self.more_lines is not None: |
| 136 | b = self.buffer |
| 137 | p = self.pos |
| 138 | while p > 0 and b[p - 1] != "\n": |
| 139 | p -= 1 |
| 140 | num_spaces = 4 - ((self.pos - p) % 4) |
| 141 | return [" " * num_spaces] |
| 142 | result = [] |
| 143 | function = self.config.readline_completer |
| 144 | if function is not None: |
| 145 | try: |
| 146 | stem = str(stem) # rlcompleter.py seems to not like unicode |
| 147 | except UnicodeEncodeError: |
| 148 | pass # but feed unicode anyway if we have no choice |
| 149 | state = 0 |
| 150 | while True: |
| 151 | try: |
| 152 | next = function(stem, state) |
| 153 | except Exception: |
| 154 | break |
| 155 | if not isinstance(next, str): |
| 156 | break |
| 157 | result.append(next) |
| 158 | state += 1 |
| 159 | # emulate the behavior of the standard readline that sorts |
| 160 | # the completions before displaying them. |
| 161 | result.sort() |
| 162 | return result |