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Switch head range from row range to byte offset range

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Co-Authored-By: Max Brunsfeld <max@zed.dev>
This commit is contained in:
Julia 2022-09-09 17:32:19 -04:00
parent 61ff24edc8
commit a2e8fc79d9
1 changed files with 255 additions and 150 deletions
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403
crates/language/src/git.rs
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@ -16,7 +16,7 @@ pub enum DiffHunkStatus {
#[derive(Debug, Clone, PartialEq, Eq)] #[derive(Debug, Clone, PartialEq, Eq)]
pub struct DiffHunk<T> { pub struct DiffHunk<T> {
pub buffer_range: Range<T>, pub buffer_range: Range<T>,
pub head_range: Range<u32>, pub head_range: Range<usize>,
} }
impl DiffHunk<u32> { impl DiffHunk<u32> {
@ -45,7 +45,7 @@ impl sum_tree::Item for DiffHunk<Anchor> {
#[derive(Debug, Default, Clone)] #[derive(Debug, Default, Clone)]
pub struct DiffHunkSummary { pub struct DiffHunkSummary {
buffer_range: Range<Anchor>, buffer_range: Range<Anchor>,
head_range: Range<u32>, head_range: Range<usize>,
} }
impl sum_tree::Summary for DiffHunkSummary { impl sum_tree::Summary for DiffHunkSummary {
@ -58,7 +58,7 @@ impl sum_tree::Summary for DiffHunkSummary {
} }
#[derive(Debug, Default, Clone, PartialEq, Eq, PartialOrd, Ord)] #[derive(Debug, Default, Clone, PartialEq, Eq, PartialOrd, Ord)]
struct HunkHeadEnd(u32); struct HunkHeadEnd(usize);
impl<'a> sum_tree::Dimension<'a, DiffHunkSummary> for HunkHeadEnd { impl<'a> sum_tree::Dimension<'a, DiffHunkSummary> for HunkHeadEnd {
fn add_summary(&mut self, summary: &'a DiffHunkSummary, _: &text::BufferSnapshot) { fn add_summary(&mut self, summary: &'a DiffHunkSummary, _: &text::BufferSnapshot) {
@ -83,55 +83,63 @@ impl<'a> sum_tree::Dimension<'a, DiffHunkSummary> for HunkBufferEnd {
} }
} }
struct HunkIter<'a> { // struct HunkIter<'a> {
index: usize, // index: usize,
patch: GitPatch<'a>, // patch: GitPatch<'a>,
} // }
impl<'a> HunkIter<'a> { // impl<'a> HunkIter<'a> {
fn diff(head: &'a [u8], current: &'a [u8]) -> Option<Self> { // fn diff(head: &'a [u8], current: &'a [u8]) -> Option<Self> {
let mut options = GitOptions::default(); // let mut options = GitOptions::default();
options.context_lines(0); // options.context_lines(0);
let patch = match GitPatch::from_buffers(head, None, current, None, Some(&mut options)) { // let patch = match GitPatch::from_buffers(head, None, current, None, Some(&mut options)) {
Ok(patch) => patch, // Ok(patch) => patch,
Err(_) => return None, // Err(_) => return None,
}; // };
Some(HunkIter { index: 0, patch }) // Some(HunkIter { index: 0, patch })
} // }
fn next(&mut self, buffer: &BufferSnapshot) -> Option<DiffHunk<Anchor>> { // fn next(&mut self, buffer: &BufferSnapshot) -> Option<DiffHunk<Anchor>> {
if self.index >= self.patch.num_hunks() { // if self.index >= self.patch.num_hunks() {
return None; // return None;
} // }
let (hunk, _) = match self.patch.hunk(self.index) { // let (hunk, _) = match self.patch.hunk(self.index) {
Ok(it) => it, // Ok(it) => it,
Err(_) => return None, // Err(_) => return None,
}; // };
// let hunk_line_count = self.patch.num_lines_in_hunk(self.index).unwrap();
let new_start = hunk.new_start() - 1; // println!("{hunk:#?}");
let new_end = new_start + hunk.new_lines(); // for index in 0..hunk_line_count {
let start_anchor = buffer.anchor_at(Point::new(new_start, 0), Bias::Left); // println!("{:?}", self.patch.line_in_hunk(self.index, index));
let end_anchor = buffer.anchor_at(Point::new(new_end, 0), Bias::Left); // }
let buffer_range = start_anchor..end_anchor;
//This is probably wrong? When does this trigger? Should buffer range also do this? // let new_start = hunk.new_start() - 1;
let head_range = if hunk.old_start() == 0 { // let new_end = new_start + hunk.new_lines();
0..0 // let start_anchor = buffer.anchor_at(Point::new(new_start, 0), Bias::Left);
} else { // let end_anchor = buffer.anchor_at(Point::new(new_end, 0), Bias::Left);
let old_start = hunk.old_start() - 1; // let buffer_range = start_anchor..end_anchor;
let old_end = old_start + hunk.old_lines();
old_start..old_end
};
self.index += 1; // //This is probably wrong? When does this trigger? Should buffer range also do this?
Some(DiffHunk { // let head_range = if hunk.old_start() == 0 {
buffer_range, // 0..0
head_range, // } else {
}) // let old_start = hunk.old_start() - 1;
} // let old_end = old_start + hunk.old_lines();
} // old_start..old_end
// };
// // let head_start_index = self.patch.line_in_hunk(self.index, 0)
// self.index += 1;
// Some(DiffHunk {
// buffer_range,
// head_range,
// })
// }
// }
#[derive(Clone)] #[derive(Clone)]
pub struct BufferDiffSnapshot { pub struct BufferDiffSnapshot {
@ -144,7 +152,7 @@ impl BufferDiffSnapshot {
query_row_range: Range<u32>, query_row_range: Range<u32>,
buffer: &'a BufferSnapshot, buffer: &'a BufferSnapshot,
) -> impl 'a + Iterator<Item = DiffHunk<u32>> { ) -> impl 'a + Iterator<Item = DiffHunk<u32>> {
println!("{} hunks overall", self.tree.iter().count()); // println!("{} hunks overall", self.tree.iter().count());
self.tree.iter().filter_map(move |hunk| { self.tree.iter().filter_map(move |hunk| {
let range = hunk.buffer_range.to_point(&buffer); let range = hunk.buffer_range.to_point(&buffer);
@ -183,16 +191,100 @@ impl BufferDiff {
let buffer_string = buffer.as_rope().to_string(); let buffer_string = buffer.as_rope().to_string();
let buffer_bytes = buffer_string.as_bytes(); let buffer_bytes = buffer_string.as_bytes();
let iter = HunkIter::diff(head_text.as_bytes(), buffer_bytes); let mut options = GitOptions::default();
if let Some(mut iter) = iter { options.context_lines(0);
let mut hunks = SumTree::new(); let patch = match GitPatch::from_buffers(
while let Some(hunk) = iter.next(buffer) { head_text.as_bytes(),
None,
buffer_bytes,
None,
Some(&mut options),
) {
Ok(patch) => patch,
Err(_) => todo!("This needs to be handled"),
};
let mut hunks = SumTree::<DiffHunk<Anchor>>::new();
let mut delta = 0i64;
for i in 0..patch.num_hunks() {
let diff_line_item_count = patch.num_lines_in_hunk(i).unwrap();
// if diff_line_item_count == 0 {
// continue;
// }
// let calc_line_diff_hunk = || {
// };
// let first_line = patch.line_in_hunk(0).unwrap();
// let mut hunk =
for j in 0..diff_line_item_count {
let line = patch.line_in_hunk(i, j).unwrap();
let hunk = match line.origin_value() {
libgit::DiffLineType::Addition => {
let buffer_start = line.content_offset();
let buffer_end = buffer_start as usize + line.content().len();
let head_offset = (buffer_start - delta) as usize;
delta += line.content().len() as i64;
DiffHunk {
buffer_range: buffer.anchor_before(buffer_start as usize)
..buffer.anchor_after(buffer_end),
head_range: head_offset..head_offset,
}
}
libgit::DiffLineType::Deletion => {
let head_start = line.content_offset();
let head_end = head_start as usize + line.content().len();
let buffer_offset = (head_start + delta) as usize;
delta -= line.content().len() as i64;
DiffHunk {
buffer_range: buffer.anchor_before(buffer_offset)
..buffer.anchor_after(buffer_offset),
head_range: (head_start as usize)..head_end,
}
}
libgit::DiffLineType::AddEOFNL => todo!(),
libgit::DiffLineType::ContextEOFNL => todo!(),
libgit::DiffLineType::DeleteEOFNL => todo!(),
libgit::DiffLineType::Context => unreachable!(),
libgit::DiffLineType::FileHeader => continue,
libgit::DiffLineType::HunkHeader => continue,
libgit::DiffLineType::Binary => continue,
};
let mut combined = false;
hunks.update_last(
|last_hunk| {
if last_hunk.head_range.end == hunk.head_range.start {
last_hunk.head_range.end = hunk.head_range.end;
last_hunk.buffer_range.end = hunk.buffer_range.end;
combined = true;
}
},
buffer,
);
if !combined {
hunks.push(hunk, buffer); hunks.push(hunk, buffer);
} }
hunks
} else {
SumTree::new()
} }
}
// let iter = HunkIter::diff(head_text.as_bytes(), buffer_bytes);
// if let Some(mut iter) = iter {
// let mut hunks = SumTree::new();
// while let Some(hunk) = iter.next(buffer) {
// hunks.push(hunk, buffer);
// }
// println!("========");
// hunks
// } else {
// SumTree::new()
// }
hunks
} else { } else {
SumTree::new() SumTree::new()
}; };
@ -208,108 +300,108 @@ impl BufferDiff {
} }
pub fn update(&mut self, head: &Rope, buffer: &text::BufferSnapshot) { pub fn update(&mut self, head: &Rope, buffer: &text::BufferSnapshot) {
let expand_by = 20; // let expand_by = 20;
let combine_distance = 5; // let combine_distance = 5;
struct EditRange { // struct EditRange {
head_start: u32, // head_start: u32,
head_end: u32, // head_end: u32,
buffer_start: u32, // buffer_start: u32,
buffer_end: u32, // buffer_end: u32,
} // }
let mut ranges = Vec::<EditRange>::new(); // let mut ranges = Vec::<EditRange>::new();
for edit in buffer.edits_since::<Point>(&self.last_update_version) { // for edit in buffer.edits_since::<Point>(&self.last_update_version) {
//This bit is extremely wrong, this is not where these row lines should come from // //This bit is extremely wrong, this is not where these row lines should come from
let head_start = edit.old.start.row.saturating_sub(expand_by); // let head_start = edit.old.start.row.saturating_sub(expand_by);
let head_end = (edit.old.end.row + expand_by).min(head.summary().lines.row + 1); // let head_end = (edit.old.end.row + expand_by).min(head.summary().lines.row + 1);
let buffer_start = edit.new.start.row.saturating_sub(expand_by); // let buffer_start = edit.new.start.row.saturating_sub(expand_by);
let buffer_end = (edit.new.end.row + expand_by).min(buffer.row_count()); // let buffer_end = (edit.new.end.row + expand_by).min(buffer.row_count());
if let Some(last_range) = ranges.last_mut() { // if let Some(last_range) = ranges.last_mut() {
let head_distance = last_range.head_end.abs_diff(head_end); // let head_distance = last_range.head_end.abs_diff(head_end);
let buffer_distance = last_range.buffer_end.abs_diff(buffer_end); // let buffer_distance = last_range.buffer_end.abs_diff(buffer_end);
if head_distance <= combine_distance || buffer_distance <= combine_distance { // if head_distance <= combine_distance || buffer_distance <= combine_distance {
last_range.head_start = last_range.head_start.min(head_start); // last_range.head_start = last_range.head_start.min(head_start);
last_range.head_end = last_range.head_end.max(head_end); // last_range.head_end = last_range.head_end.max(head_end);
last_range.buffer_start = last_range.buffer_start.min(buffer_start); // last_range.buffer_start = last_range.buffer_start.min(buffer_start);
last_range.buffer_end = last_range.buffer_end.max(buffer_end); // last_range.buffer_end = last_range.buffer_end.max(buffer_end);
} else { // } else {
ranges.push(EditRange { // ranges.push(EditRange {
head_start, // head_start,
head_end, // head_end,
buffer_start, // buffer_start,
buffer_end, // buffer_end,
}); // });
} // }
} else { // } else {
ranges.push(EditRange { // ranges.push(EditRange {
head_start, // head_start,
head_end, // head_end,
buffer_start, // buffer_start,
buffer_end, // buffer_end,
}); // });
} // }
} // }
self.last_update_version = buffer.version().clone(); // self.last_update_version = buffer.version().clone();
let mut new_hunks = SumTree::new(); // let mut new_hunks = SumTree::new();
let mut cursor = self.snapshot.tree.cursor::<HunkHeadEnd>(); // let mut cursor = self.snapshot.tree.cursor::<HunkHeadEnd>();
for range in ranges { // for range in ranges {
let head_range = range.head_start..range.head_end; // let head_range = range.head_start..range.head_end;
let head_slice = head.slice_rows(head_range.clone()); // let head_slice = head.slice_rows(head_range.clone());
let head_str = head_slice.to_string(); // let head_str = head_slice.to_string();
let buffer_range = range.buffer_start..range.buffer_end; // let buffer_range = range.buffer_start..range.buffer_end;
let buffer_slice = buffer.as_rope().slice_rows(buffer_range.clone()); // let buffer_slice = buffer.as_rope().slice_rows(buffer_range.clone());
let buffer_str = buffer_slice.to_string(); // let buffer_str = buffer_slice.to_string();
println!("diffing head {:?}, buffer {:?}", head_range, buffer_range); // println!("diffing head {:?}, buffer {:?}", head_range, buffer_range);
let mut iter = match HunkIter::diff(head_str.as_bytes(), buffer_str.as_bytes()) { // let mut iter = match HunkIter::diff(head_str.as_bytes(), buffer_str.as_bytes()) {
Some(iter) => iter, // Some(iter) => iter,
None => continue, // None => continue,
}; // };
while let Some(hunk) = iter.next(buffer) { // while let Some(hunk) = iter.next(buffer) {
println!("hunk"); // println!("hunk");
let prefix = cursor.slice(&HunkHeadEnd(hunk.head_range.end), Bias::Right, buffer); // let prefix = cursor.slice(&HunkHeadEnd(hunk.head_range.end), Bias::Right, buffer);
println!("prefix len: {}", prefix.iter().count()); // println!("prefix len: {}", prefix.iter().count());
new_hunks.extend(prefix.iter().cloned(), buffer); // new_hunks.extend(prefix.iter().cloned(), buffer);
new_hunks.push(hunk.clone(), buffer); // new_hunks.push(hunk.clone(), buffer);
cursor.seek(&HunkHeadEnd(hunk.head_range.end), Bias::Right, buffer); // cursor.seek(&HunkHeadEnd(hunk.head_range.end), Bias::Right, buffer);
println!("item: {:?}", cursor.item()); // println!("item: {:?}", cursor.item());
if let Some(item) = cursor.item() { // if let Some(item) = cursor.item() {
if item.head_range.end <= hunk.head_range.end { // if item.head_range.end <= hunk.head_range.end {
println!("skipping"); // println!("skipping");
cursor.next(buffer); // cursor.next(buffer);
} // }
} // }
} // }
} // }
new_hunks.extend( // new_hunks.extend(
cursor // cursor
.suffix(buffer) // .suffix(buffer)
.iter() // .iter()
.map(|i| { // .map(|i| {
println!("extending with {i:?}"); // println!("extending with {i:?}");
i // i
}) // })
.cloned(), // .cloned(),
buffer, // buffer,
); // );
drop(cursor); // drop(cursor);
self.snapshot.tree = new_hunks; // self.snapshot.tree = new_hunks;
} }
} }
@ -354,22 +446,35 @@ mod tests {
let mut buffer = Buffer::new(0, 0, buffer_text); let mut buffer = Buffer::new(0, 0, buffer_text);
let diff = BufferDiff::new(&Some(head_text.clone()), &buffer); let diff = BufferDiff::new(&Some(head_text.clone()), &buffer);
assert_eq!( assert_hunks(&diff, &buffer, &head_text, &[(1..2, "two\n")]);
diff.snapshot.hunks(&buffer).collect::<Vec<_>>(),
&[DiffHunk {
buffer_range: 1..2,
head_range: 1..2
}]
);
buffer.edit([(0..0, "point five\n")]); buffer.edit([(0..0, "point five\n")]);
assert_hunks(&diff, &buffer, &head_text, &[(2..3, "two\n")]);
}
#[track_caller]
fn assert_hunks(
diff: &BufferDiff,
buffer: &BufferSnapshot,
head_text: &str,
expected_hunks: &[(Range<u32>, &str)],
) {
let hunks = diff.snapshot.hunks(buffer).collect::<Vec<_>>();
assert_eq!( assert_eq!(
diff.snapshot.hunks(&buffer).collect::<Vec<_>>(), hunks.len(),
&[DiffHunk { expected_hunks.len(),
buffer_range: 2..3, "actual hunks are {hunks:#?}"
head_range: 1..2
}]
); );
let diff_iter = hunks.iter().enumerate();
for ((index, hunk), (expected_range, expected_str)) in diff_iter.zip(expected_hunks) {
assert_eq!(&hunk.buffer_range, expected_range, "for hunk {index}");
assert_eq!(
&head_text[hunk.head_range.clone()],
*expected_str,
"for hunk {index}"
);
}
} }
// use rand::rngs::StdRng; // use rand::rngs::StdRng;