Fix Windows "Alt" modifier support #6236
Open
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Summary
Windows terminals that don’t implement the Kitty keyboard protocol deliver Alt+key combinations as ESC followed by a character, so Textual only sees the plain key press. This PR adds a fallback path that synthesizes Kitty-style sequences in those cases, enabling Alt bindings without breaking true Kitty support added in #6207.
Fixes #6192
Testing
Added:
tests/test_windows_key_sequences.pyModified:
tests/test_xterm_parser.pyPlease review the following checklist.