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@ -1240,6 +1240,22 @@ impl Document {
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/// the state it had when this function was called.
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pub fn savepoint(&mut self, view: &View) -> Arc<SavePoint> {
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let revert = Transaction::new(self.text()).with_selection(self.selection(view.id).clone());
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// check if there is already an existing (identical) savepoint around
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if let Some(savepoint) = self
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.savepoints
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.iter()
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.rev()
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.find_map(|savepoint| savepoint.upgrade())
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{
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let transaction = savepoint.revert.lock();
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if savepoint.view == view.id
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&& transaction.changes().is_empty()
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&& transaction.selection() == revert.selection()
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{
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drop(transaction);
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return savepoint;
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}
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}
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let savepoint = Arc::new(SavePoint {
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view: view.id,
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revert: Mutex::new(revert),
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