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Return optional transaction ids when starting/ending a transaction

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If the transaction was nested, we return None. Otherwise we return the transaction id in preparation for editors to maintain their own selection state.
This commit is contained in:
Nathan Sobo 2021-12-10 18:00:09 -07:00
parent c8b43e3078
commit 77defe6e28
6 changed files with 65 additions and 52 deletions
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16
crates/language/src/tests.rs
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@ -92,15 +92,15 @@ fn test_edit_events(cx: &mut gpui::MutableAppContext) {
buffer.edit(Some(2..4), "XYZ", cx);
// An empty transaction does not emit any events.
buffer.start_transaction(None).unwrap();
buffer.end_transaction(None, cx).unwrap();
buffer.start_transaction(None);
buffer.end_transaction(None, cx);
// A transaction containing two edits emits one edited event.
now += Duration::from_secs(1);
buffer.start_transaction_at(None, now).unwrap();
buffer.start_transaction_at(None, now);
buffer.edit(Some(5..5), "u", cx);
buffer.edit(Some(6..6), "w", cx);
buffer.end_transaction_at(None, now, cx).unwrap();
buffer.end_transaction_at(None, now, cx);
// Undoing a transaction emits one edited event.
buffer.undo(cx);
@ -167,7 +167,7 @@ async fn test_reparse(mut cx: gpui::TestAppContext) {
// Perform some edits (add parameter and variable reference)
// Parsing doesn't begin until the transaction is complete
buffer.update(&mut cx, |buf, cx| {
buf.start_transaction(None).unwrap();
buf.start_transaction(None);
let offset = buf.text().find(")").unwrap();
buf.edit(vec![offset..offset], "b: C", cx);
@ -177,7 +177,7 @@ async fn test_reparse(mut cx: gpui::TestAppContext) {
buf.edit(vec![offset..offset], " d; ", cx);
assert!(!buf.is_parsing());
buf.end_transaction(None, cx).unwrap();
buf.end_transaction(None, cx);
assert_eq!(buf.text(), "fn a(b: C) { d; }");
assert!(buf.is_parsing());
});
@ -342,7 +342,7 @@ fn test_autoindent_moves_selections(cx: &mut MutableAppContext) {
Buffer::new(0, text, cx).with_language(Some(Arc::new(rust_lang())), None, cx);
let selection_set_id = buffer.add_selection_set::<usize>(&[], cx);
buffer.start_transaction(Some(selection_set_id)).unwrap();
buffer.start_transaction(Some(selection_set_id));
buffer.edit_with_autoindent([5..5, 9..9], "\n\n", cx);
buffer
.update_selection_set(
@ -370,7 +370,7 @@ fn test_autoindent_moves_selections(cx: &mut MutableAppContext) {
// Ending the transaction runs the auto-indent. The selection
// at the start of the auto-indented row is pushed to the right.
buffer.end_transaction(Some(selection_set_id), cx).unwrap();
buffer.end_transaction(Some(selection_set_id), cx);
assert_eq!(buffer.text(), "fn a(\n \n) {}\n\n");
let selection_ranges = buffer
.selection_set(selection_set_id)