Pascal and I discussed this and we think it's generally better to
take a 'RopeSlice' rather than a '&Rope'. The code block rendering
function in the markdown component module is a good example for how
this can be useful: we can remove an allocation of a rope and instead
directly turn a '&str' into a 'RopeSlice' which is very cheap.
A change to prefer 'RopeSlice' to '&Rope' whenever the rope isn't
modified would be nice, but it would be a very large diff (around 500+
500-). Starting off with just the syntax functions seems like a nice
middle-ground, and we can remove a Rope allocation because of it.
Co-authored-by: Pascal Kuthe <pascal.kuthe@semimod.de>
* Add a undo/redo split test case for crossing branches
* history: Switch up/down transaction chaining order
The old code tends to work in practice because, usually, either up_txns
or down_txns are empty. When both have contents though, we can run into
a panic trying to compose them all since they will disagree on the
length of the text. This fixes the panic test case in the parent
commit.
The 'revisions' field on History can't be treated as linear: each
Revision in the revisions Vec has a parent link and an optional child
link. We can follow those to unroll the recent history.
When using undo/redo, the history revision can be decremented. In that
case we should apply the inversions since the given revision in
History::changes_since. This prevents panics with jumplist operations
when a session uses undo/redo to move the jumplist selection outside
of the document.
* Add a test case for updating jumplists across windows
* Apply transactions to all views on history changes
This ensures that jumplist selections follow changes in documents, even
when there are multiple views (for example a split where both windows
edit the same document).
* Leave TODOs for cleaning up View::apply
* Use Iterator::reduce to compose history transactions
Co-authored-by: Blaž Hrastnik <blaz@mxxn.io>
Co-authored-by: Blaž Hrastnik <blaz@mxxn.io>
* Disable deleting from an empty buffer which can cause a crash.
* Improve on the fix for deleting from the end of the buffer.
* Clean up leftover log.
* Avoid theoretical underflow.
* Implement :before which accepts a time interval and moves the editor to
the closest history state to the commit of the current time minus that
interval. Current time is now by default, or the commit time if :before
has just been used.
* Add :earlier an :later commands that can move through
the edit history and retrieve changes hidded by undoing
and commiting new changes. The commands accept a number
of steps or a time period relative to the currrent change.
* Fix clippy lint error.
* Remove the dependency on parse_duration, add a custom parser instead.
* Fix clippy errors.
* Make helix_core::history a public module.
* Use the helper for getting the current document and view.
* Handled some PR comments.
* Fix the logic in :later n.
Co-authored-by: Ivan Tham <pickfire@riseup.net>
* Add an alias for :earlier.
Co-authored-by: Ivan Tham <pickfire@riseup.net>
* Add an alias for later.
Co-authored-by: Ivan Tham <pickfire@riseup.net>
* Run cargo fmt.
* Add some tests for earlier and later.
* Add more tests and restore the fix for later that diappeared somehow.
* Use ? instead of a match on an option.
Co-authored-by: Ivan Tham <pickfire@riseup.net>
* Rename to UndoKind.
* Remove the leftover match.
* Handle a bunch of review comments.
* More systemd.time compliant time units and additional description for the new commands.
* A more concise rewrite of the time span parser using ideas from PR discussion.
* Replace a match with map_err().
Co-authored-by: Ivan Tham <pickfire@riseup.net>
Co-authored-by: Jakub Bartodziej <jqb@google.com>
Co-authored-by: Ivan Tham <pickfire@riseup.net>
