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Return optional transaction ids from undo/redo

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This will allow the editor to restore selections that it associated with the start or end of a transaction.
This commit is contained in:
Nathan Sobo 2021-12-10 18:08:26 -07:00
parent 77defe6e28
commit f35c419f43
3 changed files with 32 additions and 18 deletions
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4
crates/editor/src/multi_buffer.rs
View file

@ -224,14 +224,14 @@ impl MultiBuffer {
})
}
pub fn undo(&mut self, cx: &mut ModelContext<Self>) {
pub fn undo(&mut self, cx: &mut ModelContext<Self>) -> Option<TransactionId> {
// TODO
self.as_singleton()
.unwrap()
.update(cx, |buffer, cx| buffer.undo(cx))
}
pub fn redo(&mut self, cx: &mut ModelContext<Self>) {
pub fn redo(&mut self, cx: &mut ModelContext<Self>) -> Option<TransactionId> {
// TODO
self.as_singleton()
.unwrap()

28
crates/language/src/buffer.rs
View file

@ -1443,26 +1443,34 @@ impl Buffer {
cx.notify();
}
pub fn undo(&mut self, cx: &mut ModelContext<Self>) {
pub fn undo(&mut self, cx: &mut ModelContext<Self>) -> Option<TransactionId> {
let was_dirty = self.is_dirty();
let old_version = self.version.clone();
for operation in self.text.undo() {
self.send_operation(Operation::Buffer(operation), cx);
if let Some((transaction_id, operations)) = self.text.undo() {
for operation in operations {
self.send_operation(Operation::Buffer(operation), cx);
}
self.did_edit(&old_version, was_dirty, cx);
Some(transaction_id)
} else {
None
}
self.did_edit(&old_version, was_dirty, cx);
}
pub fn redo(&mut self, cx: &mut ModelContext<Self>) {
pub fn redo(&mut self, cx: &mut ModelContext<Self>) -> Option<TransactionId> {
let was_dirty = self.is_dirty();
let old_version = self.version.clone();
for operation in self.text.redo() {
self.send_operation(Operation::Buffer(operation), cx);
if let Some((transaction_id, operations)) = self.text.redo() {
for operation in operations {
self.send_operation(Operation::Buffer(operation), cx);
}
self.did_edit(&old_version, was_dirty, cx);
Some(transaction_id)
} else {
None
}
self.did_edit(&old_version, was_dirty, cx);
}
}

18
crates/text/src/text.rs
View file

@ -1221,28 +1221,34 @@ impl Buffer {
self.history.ops.values()
}
pub fn undo(&mut self) -> Vec<Operation> {
let mut ops = Vec::new();
pub fn undo(&mut self) -> Option<(TransactionId, Vec<Operation>)> {
if let Some(transaction) = self.history.pop_undo().cloned() {
let transaction_id = transaction.id;
let selections = transaction.selections_before.clone();
let mut ops = Vec::new();
ops.push(self.undo_or_redo(transaction).unwrap());
for (set_id, selections) in selections {
ops.extend(self.restore_selection_set(set_id, selections));
}
Some((transaction_id, ops))
} else {
None
}
ops
}
pub fn redo(&mut self) -> Vec<Operation> {
let mut ops = Vec::new();
pub fn redo(&mut self) -> Option<(TransactionId, Vec<Operation>)> {
if let Some(transaction) = self.history.pop_redo().cloned() {
let transaction_id = transaction.id;
let selections = transaction.selections_after.clone();
let mut ops = Vec::new();
ops.push(self.undo_or_redo(transaction).unwrap());
for (set_id, selections) in selections {
ops.extend(self.restore_selection_set(set_id, selections));
}
Some((transaction_id, ops))
} else {
None
}
ops
}
fn undo_or_redo(&mut self, transaction: Transaction) -> Result<Operation> {