diff options
Diffstat (limited to 'Lib/_pyrepl/keymap.py')
| -rw-r--r-- | Lib/_pyrepl/keymap.py | 63 |
1 files changed, 29 insertions, 34 deletions
diff --git a/Lib/_pyrepl/keymap.py b/Lib/_pyrepl/keymap.py index a303589..2fb03d1 100644 --- a/Lib/_pyrepl/keymap.py +++ b/Lib/_pyrepl/keymap.py @@ -19,38 +19,32 @@ # CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. """ -functions for parsing keyspecs +Keymap contains functions for parsing keyspecs and turning keyspecs into +appropriate sequences. -Support for turning keyspecs into appropriate sequences. +A keyspec is a string representing a sequence of key presses that can +be bound to a command. All characters other than the backslash represent +themselves. In the traditional manner, a backslash introduces an escape +sequence. -pyrepl uses it's own bastardized keyspec format, which is meant to be -a strict superset of readline's \"KEYSEQ\" format (which is to say -that if you can come up with a spec readline accepts that this -doesn't, you've found a bug and should tell me about it). - -Note that this is the `\\C-o' style of readline keyspec, not the -`Control-o' sort. - -A keyspec is a string representing a sequence of keypresses that can -be bound to a command. - -All characters other than the backslash represent themselves. In the -traditional manner, a backslash introduces a escape sequence. +pyrepl uses its own keyspec format that is meant to be a strict superset of +readline's KEYSEQ format. This means that if a spec is found that readline +accepts that this doesn't, it should be logged as a bug. Note that this means +we're using the `\\C-o' style of readline's keyspec, not the `Control-o' sort. The extension to readline is that the sequence \\<KEY> denotes the -sequence of charaters produced by hitting KEY. +sequence of characters produced by hitting KEY. Examples: - -`a' - what you get when you hit the `a' key +`a' - what you get when you hit the `a' key `\\EOA' - Escape - O - A (up, on my terminal) `\\<UP>' - the up arrow key -`\\<up>' - ditto (keynames are case insensitive) +`\\<up>' - ditto (keynames are case-insensitive) `\\C-o', `\\c-o' - control-o `\\M-.' - meta-period `\\E.' - ditto (that's how meta works for pyrepl) `\\<tab>', `\\<TAB>', `\\t', `\\011', '\\x09', '\\X09', '\\C-i', '\\C-I' - - all of these are the tab character. Can you think of any more? + - all of these are the tab character. """ _escapes = { @@ -111,7 +105,17 @@ class KeySpecError(Exception): pass -def _parse_key1(key, s): +def parse_keys(keys: str) -> list[str]: + """Parse keys in keyspec format to a sequence of keys.""" + s = 0 + r: list[str] = [] + while s < len(keys): + k, s = _parse_single_key_sequence(keys, s) + r.extend(k) + return r + + +def _parse_single_key_sequence(key: str, s: int) -> tuple[list[str], int]: ctrl = 0 meta = 0 ret = "" @@ -183,20 +187,11 @@ def _parse_key1(key, s): ret = f"ctrl {ret}" else: raise KeySpecError("\\C- followed by invalid key") - if meta: - ret = ["\033", ret] - else: - ret = [ret] - return ret, s - -def parse_keys(key: str) -> list[str]: - s = 0 - r = [] - while s < len(key): - k, s = _parse_key1(key, s) - r.extend(k) - return r + result = [ret], s + if meta: + result[0].insert(0, "\033") + return result def compile_keymap(keymap, empty=b""): |