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feat: add delta (replace with offset) in factory

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This commit is contained in:
əlemi 2023-04-20 04:36:04 +02:00
parent 97be3cf4ce
commit c5d171a641
1 changed files with 12 additions and 3 deletions
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15
src/lib/operation/factory.rs
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@ -4,14 +4,21 @@ use similar::{TextDiff, ChangeTag};
pub trait OperationFactory {
fn content(&self) -> String;
fn replace(&self, txt: &str) -> OperationSeq {
fn replace(&self, txt: &str) -> OperationSeq { self.delta(0, txt, 0) }
fn delta(&self, skip: usize, txt: &str, tail: usize) -> OperationSeq {
let mut out = OperationSeq::default();
let content = self.content();
if content == txt {
let tail_index = content.len() - tail;
let content_slice = &content[skip..tail_index];
if content_slice == txt {
return out; // TODO this won't work, should we return a noop instead?
}
let diff = TextDiff::from_chars(content.as_str(), txt);
out.retain(skip as u64);
let diff = TextDiff::from_chars(content_slice, txt);
for change in diff.iter_all_changes() {
match change.tag() {
@ -21,6 +28,8 @@ pub trait OperationFactory {
}
}
out.retain(tail as u64);
out
}