This fixes loading samples/4x4_font_template.ans, and I should be able
to rebase my code for more efficient ANSI file saving, where I was also
running into missing last rows.
- `observer` can be None, if --restart-on-changes was not passed, but
the hotkey F2 is pressed.
- `is_alive` is a bound method, not a property. It was definitely used
like a property in the code I referenced.
I didn't fix these type checker errors for a long time because:
1. they never caused actual problems for me, and
2. when adding a type annotation `observer: Observer | None`, Pyright
gets even _more_ confused, saying it's Unknown | None instead of
BaseObserver | None. The secret trick was to leave it unannotated.
3. Adding parentheses to make it `is_alive()` also made Pyright seem
even more confused, saying it was Unknown — until I added the
conditional.
Type of "schedule" is partially unknown
Type of "schedule" is "(event_handler: Unknown, path: Unknown, recursive: bool = False) -> ObservedWatch"PylancereportUnknownMemberType
Ooh, more importantly than running in parallel, this actually fixes
error handling. I had chmodded a file to be read-only for testing,
and this is failing on it loudly instead of silently ignoring an error
that I didn't know about! Because it was silenced! That was a bit of a
redundant way of saying that, but better to be heard than be SILENT...!
*crickets*
The backup of the current file will be deleted just after opening it.
I should probably actually prevent that, but this commit just fixes
an error message thrown up when trying to then open another file.
It said "File not found", but confusingly was not referring to the file
you were trying to open, but rather the currently open file.
Repro test steps:
Open a file (optional), make changes, and wait for backup to be saved;
open the new .ans~ backup file (discarding changes to the main file),
then try to open any file. "File not found" message should not be shown.
- This is shorter/cleaner.
- This is less prone to mistaken parentheses placement, although it
should give a type error to do `Static() + Static()`
- I already disabled markup parsing for two cases where filenames are
interpolated, but there was still:
"An unexpected error occurred while reading %1"
which was liable to misinterpret things as markup.
Note that anything in square brackets can be treated as markup and
become hidden, not just recognized tags like [red].
For example, in the Open dialog, typing a filename that doesn't exist,
and then hitting enter, it's supposed to say "File not found", but
if the event isn't prevented/stopped, it will also be handled by
the new dialog, and you won't even see it.
I think the `if self._selected_file_path is None: return` was from
copying from CharacterSelectorDialogWindow and isn't applicable.
(I renamed anything with "character" to "file_path".)
After removing this check, I shouldn't need `or ""` for the Open dialogs
- This fixes a potential race condition where it could auto-save
to the wrong backup file while the file_path was temporarily
set to the path attempting to be written to,
overwriting the backup if it existed, and leaving it behind on close,
since the file_path would be reverted momentarily.
- save_as() no longer uses save(), so save doesn't need a from_save_as
parameter to change the error dialog titles, and there's no more
conceptual awkwardness due to the fact that each function could call
the other.
- discard_backup() no longer needs an optional parameter, because
we no longer discard a backup that isn't associated to the current
document's file_path.
- The "correct thing" is now obvious enough that I don't feel the need
for the "Don't discard the backup until..." comment.
(And of course all that todo junk can go, although the Copy To bit
remains to do.)
It's nice when things Actually Get Simpler!
