* Fix saving changes to statuses when editing
With the previous code backing out of a status editing operation where changes
had been made (whether it was editing an existing status, a scheduled status,
or a draft) would prompt the user to save the changes as a new draft.
See https://github.com/tuskyapp/Tusky/issues/2704 and
https://github.com/tuskyapp/Tusky/issues/2705 for more detail.
The fix:
- Create an enum to represent the four different kinds of edits that can
happen
- Editing a new status (i.e., composing it for the first time)
- Editing a posted status
- Editing a draft
- Editing a scheduled status
- Store this in ComposeOptions, and set it appropriately everywhere
ComposeOptions is created.
- Check the edit kind when backing out of ComposeActivity, and use this to
show one of three different dialogs as appropriate so the user can:
- Save as new draft or discard changes
- Continue editing or discard changes
- Update existing draft or discard changes
Also fix ComposeViewModel.didChange(), which erroneously reported false if the
old text started with the new text (e.g., if the old text was "hello, world"
and it was edited to "hello", didChange() would not consider that to be a
change).
Fixes https://github.com/tuskyapp/Tusky/issues/2704,
https://github.com/tuskyapp/Tusky/issues/2705
* Use orEmpty extension function
a5f479d79c