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Replace Default trait bound with a zero function on Summary/Dimension (#17975)

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This lets us provide a context when constructing the zero value. We need
it so we can require anchors to be associated with a buffer id, which
we're doing as part of simplifying the multibuffer API.

Release Notes:

- N/A

Co-authored-by: Nathan <nathan@zed.dev>
This commit is contained in:
Antonio Scandurra 2024-09-17 19:43:59 -06:00 • committed by GitHub
parent 4d074fc737
commit 2e72fd210a
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GPG key ID: B5690EEEBB952194
28 changed files with 706 additions and 349 deletions
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38
crates/editor/src/display_map/block_map.rs
View file

@ -389,10 +389,10 @@ impl BlockMap {
}
let mut transforms = self.transforms.borrow_mut();
let mut new_transforms = SumTree::new();
let mut new_transforms = SumTree::default();
let old_row_count = transforms.summary().input_rows;
let new_row_count = wrap_snapshot.max_point().row() + 1;
let mut cursor = transforms.cursor::<WrapRow>();
let mut cursor = transforms.cursor::<WrapRow>(&());
let mut last_block_ix = 0;
let mut blocks_in_edit = Vec::new();
let mut edits = edits.into_iter().peekable();
@ -757,7 +757,7 @@ impl<'a> BlockMapReader<'a> {
.unwrap_or(self.wrap_snapshot.max_point().row() + 1),
);
let mut cursor = self.transforms.cursor::<(WrapRow, BlockRow)>();
let mut cursor = self.transforms.cursor::<(WrapRow, BlockRow)>(&());
cursor.seek(&start_wrap_row, Bias::Left, &());
while let Some(transform) = cursor.item() {
if cursor.start().0 > end_wrap_row {
@ -950,7 +950,7 @@ impl BlockSnapshot {
highlights: Highlights<'a>,
) -> BlockChunks<'a> {
let max_output_row = cmp::min(rows.end, self.transforms.summary().output_rows);
let mut cursor = self.transforms.cursor::<(BlockRow, WrapRow)>();
let mut cursor = self.transforms.cursor::<(BlockRow, WrapRow)>(&());
let input_end = {
cursor.seek(&BlockRow(rows.end), Bias::Right, &());
let overshoot = if cursor
@ -990,7 +990,7 @@ impl BlockSnapshot {
}
pub(super) fn buffer_rows(&self, start_row: BlockRow) -> BlockBufferRows {
let mut cursor = self.transforms.cursor::<(BlockRow, WrapRow)>();
let mut cursor = self.transforms.cursor::<(BlockRow, WrapRow)>(&());
cursor.seek(&start_row, Bias::Right, &());
let (output_start, input_start) = cursor.start();
let overshoot = if cursor.item().map_or(false, |t| t.is_isomorphic()) {
@ -1008,7 +1008,7 @@ impl BlockSnapshot {
}
pub fn blocks_in_range(&self, rows: Range<u32>) -> impl Iterator<Item = (u32, &Block)> {
let mut cursor = self.transforms.cursor::<BlockRow>();
let mut cursor = self.transforms.cursor::<BlockRow>(&());
cursor.seek(&BlockRow(rows.start), Bias::Left, &());
while cursor.start().0 < rows.start && cursor.end(&()).0 <= rows.start {
cursor.next(&());
@ -1050,7 +1050,7 @@ impl BlockSnapshot {
let wrap_point = self
.wrap_snapshot
.make_wrap_point(excerpt_range.start, Bias::Left);
let mut cursor = self.transforms.cursor::<(WrapRow, BlockRow)>();
let mut cursor = self.transforms.cursor::<(WrapRow, BlockRow)>(&());
cursor.seek(&WrapRow(wrap_point.row()), Bias::Left, &());
while let Some(transform) = cursor.item() {
if let Some(block) = transform.block.as_ref() {
@ -1072,7 +1072,7 @@ impl BlockSnapshot {
.wrap_snapshot
.make_wrap_point(excerpt_range.end, Bias::Left);
let mut cursor = self.transforms.cursor::<(WrapRow, BlockRow)>();
let mut cursor = self.transforms.cursor::<(WrapRow, BlockRow)>(&());
cursor.seek(&WrapRow(wrap_point.row()), Bias::Left, &());
while let Some(transform) = cursor.item() {
if let Some(block) = transform.block.as_ref() {
@ -1102,7 +1102,7 @@ impl BlockSnapshot {
}
pub(super) fn line_len(&self, row: BlockRow) -> u32 {
let mut cursor = self.transforms.cursor::<(BlockRow, WrapRow)>();
let mut cursor = self.transforms.cursor::<(BlockRow, WrapRow)>(&());
cursor.seek(&BlockRow(row.0), Bias::Right, &());
if let Some(transform) = cursor.item() {
let (output_start, input_start) = cursor.start();
@ -1118,13 +1118,13 @@ impl BlockSnapshot {
}
pub(super) fn is_block_line(&self, row: BlockRow) -> bool {
let mut cursor = self.transforms.cursor::<(BlockRow, WrapRow)>();
let mut cursor = self.transforms.cursor::<(BlockRow, WrapRow)>(&());
cursor.seek(&row, Bias::Right, &());
cursor.item().map_or(false, |t| t.block.is_some())
}
pub fn clip_point(&self, point: BlockPoint, bias: Bias) -> BlockPoint {
let mut cursor = self.transforms.cursor::<(BlockRow, WrapRow)>();
let mut cursor = self.transforms.cursor::<(BlockRow, WrapRow)>(&());
cursor.seek(&BlockRow(point.row), Bias::Right, &());
let max_input_row = WrapRow(self.transforms.summary().input_rows);
@ -1172,7 +1172,7 @@ impl BlockSnapshot {
}
pub fn to_block_point(&self, wrap_point: WrapPoint) -> BlockPoint {
let mut cursor = self.transforms.cursor::<(WrapRow, BlockRow)>();
let mut cursor = self.transforms.cursor::<(WrapRow, BlockRow)>(&());
cursor.seek(&WrapRow(wrap_point.row()), Bias::Right, &());
if let Some(transform) = cursor.item() {
debug_assert!(transform.is_isomorphic());
@ -1188,7 +1188,7 @@ impl BlockSnapshot {
}
pub fn to_wrap_point(&self, block_point: BlockPoint) -> WrapPoint {
let mut cursor = self.transforms.cursor::<(BlockRow, WrapRow)>();
let mut cursor = self.transforms.cursor::<(BlockRow, WrapRow)>(&());
cursor.seek(&BlockRow(block_point.row), Bias::Right, &());
if let Some(transform) = cursor.item() {
match transform.block.as_ref().map(|b| b.disposition()) {
@ -1368,6 +1368,10 @@ impl sum_tree::Item for Transform {
impl sum_tree::Summary for TransformSummary {
type Context = ();
fn zero(_cx: &()) -> Self {
Default::default()
}
fn add_summary(&mut self, summary: &Self, _: &()) {
self.input_rows += summary.input_rows;
self.output_rows += summary.output_rows;
@ -1375,12 +1379,20 @@ impl sum_tree::Summary for TransformSummary {
}
impl<'a> sum_tree::Dimension<'a, TransformSummary> for WrapRow {
fn zero(_cx: &()) -> Self {
Default::default()
}
fn add_summary(&mut self, summary: &'a TransformSummary, _: &()) {
self.0 += summary.input_rows;
}
}
impl<'a> sum_tree::Dimension<'a, TransformSummary> for BlockRow {
fn zero(_cx: &()) -> Self {
Default::default()
}
fn add_summary(&mut self, summary: &'a TransformSummary, _: &()) {
self.0 += summary.output_rows;
}