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XTermHandler refactor

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This commit is contained in:
Darren Burns
2022-06-14 11:05:20 +01:00
parent 1b8781f145
commit 23855f16bc
1 changed files with 22 additions and 22 deletions
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44
src/textual/_xterm_parser.py
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@@ -96,6 +96,14 @@ class XTermParser(Parser[events.Event]):
bracketed_paste = False
reuse_escape = False
def reissue_sequence_as_keys(reissue_sequence: str) -> None:
for character in reissue_sequence:
key_events = sequence_to_key_events(character)
for event in key_events:
if event.key == "escape":
event = events.Key(event.sender, key="^")
on_token(event)
while not self.is_eof:
if not bracketed_paste and paste_buffer:
# We're at the end of the bracketed paste.
@@ -141,30 +149,22 @@ class XTermParser(Parser[events.Event]):
# the suspected sequence as Key events instead.
sequence_character = yield read1()
next_sequence = sequence + sequence_character
if (
sequence_character
and sequence_character == ESC
or len(sequence) > _MAX_SEQUENCE_SEARCH_THRESHOLD
):
if sequence_character == ESC:
# We've hit an escape, so we need to issue all the keys
# up to but not including it, since this escape could be
# part of an upcoming control sequence.
reuse_escape = True
reissue_sequence = sequence
else:
# We exceeded the sequence length threshold, so reissue all the
# characters in that sequence as key-presses.
reissue_sequence = next_sequence
for character in reissue_sequence:
key_events = sequence_to_key_events(character)
for event in key_events:
if event.key == "escape":
event = events.Key(event.sender, key="^")
on_token(event)
threshold_exceeded = len(sequence) > _MAX_SEQUENCE_SEARCH_THRESHOLD
found_escape = sequence_character and sequence_character == ESC
# We're done looking for escape sequences
if threshold_exceeded:
# We exceeded the sequence length threshold, so reissue all the
# characters in that sequence as key-presses.
reissue_sequence_as_keys(next_sequence)
break
if found_escape:
# We've hit an escape, so we need to reissue all the keys
# up to but not including it, since this escape could be
# part of an upcoming control sequence.
reuse_escape = True
reissue_sequence_as_keys(sequence)
break
sequence = next_sequence