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Add a key event queue #100

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Add a key event queue #100

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29 changes: 18 additions & 11 deletions simple_term_menu.py
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Original file line number Diff line number Diff line change
Expand Up @@ -826,6 +826,7 @@ def setup_title_or_status_bar_lines(
self._new_term = None # type: Optional[List[Union[int, List[bytes]]]]
self._tty_in = None # type: Optional[TextIO]
self._tty_out = None # type: Optional[TextIO]
self._pending_keys = ""
self._user_locale = get_locale()
self._check_for_valid_styles()
# backspace can be queried from the terminal database but is unreliable, query the terminal directly instead
Expand Down Expand Up @@ -1475,17 +1476,23 @@ def _read_next_key(self, ignore_case: bool = True) -> str:
# pylint: disable=unsubscriptable-object,unsupported-membership-test
assert self._terminal_code_to_codename is not None
assert self._tty_in is not None
# Needed for asynchronous handling of terminal resize events
self._reading_next_key = True
if self._paint_before_next_read:
self._paint_menu()
self._paint_before_next_read = False
# blocks until any amount of bytes is available
code = os.read(self._tty_in.fileno(), 80).decode("utf-8", errors="ignore")
self._reading_next_key = False
if code in self._terminal_code_to_codename:
return self._terminal_code_to_codename[code]
elif ignore_case:
if not self._pending_keys:
# Needed for asynchronous handling of terminal resize events
self._reading_next_key = True
if self._paint_before_next_read:
self._paint_menu()
self._paint_before_next_read = False
# blocks until any amount of bytes is available
self._pending_keys = os.read(self._tty_in.fileno(), 80).decode("utf-8", errors="ignore")
self._reading_next_key = False

for termcode, codename in self._terminal_code_to_codename.items():
if self._pending_keys.startswith(termcode):
self._pending_keys = self._pending_keys[len(termcode) :]
return codename
code = self._pending_keys[0]
self._pending_keys = self._pending_keys[1:]
if ignore_case:
return code.lower()
else:
return code
Expand Down