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Make BlockMap 1d

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Co-Authored-By: Nathan Sobo <nathan@zed.dev>
Co-Authored-By: Max Brunsfeld <max@zed.dev>
This commit is contained in:
Antonio Scandurra 2021-11-17 19:26:57 +01:00
parent 18354c5e04
commit d9283efbe6
2 changed files with 327 additions and 366 deletions
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5
crates/editor/src/display_map.rs
View file

@ -14,7 +14,8 @@ use sum_tree::Bias;
use tab_map::TabMap; use tab_map::TabMap;
use wrap_map::WrapMap; use wrap_map::WrapMap;
pub use block_map::{BlockDisposition, BlockProperties, BufferRows, Chunks}; pub use block_map::{BlockDisposition, BlockProperties, Chunks};
pub use wrap_map::BufferRows;
pub trait ToDisplayPoint { pub trait ToDisplayPoint {
fn to_display_point(&self, map: &DisplayMapSnapshot) -> DisplayPoint; fn to_display_point(&self, map: &DisplayMapSnapshot) -> DisplayPoint;
@ -173,7 +174,7 @@ impl DisplayMapSnapshot {
} }
pub fn buffer_rows(&self, start_row: u32) -> BufferRows { pub fn buffer_rows(&self, start_row: u32) -> BufferRows {
self.blocks_snapshot.buffer_rows(start_row) self.wraps_snapshot.buffer_rows(start_row)
} }
pub fn buffer_row_count(&self) -> u32 { pub fn buffer_row_count(&self) -> u32 {

688
crates/editor/src/display_map/block_map.rs
View file

@ -37,6 +37,12 @@ pub struct BlockId(usize);
#[derive(Copy, Clone, Debug, Default, Eq, Ord, PartialOrd, PartialEq)] #[derive(Copy, Clone, Debug, Default, Eq, Ord, PartialOrd, PartialEq)]
pub struct BlockPoint(pub super::Point); pub struct BlockPoint(pub super::Point);
#[derive(Copy, Clone, Debug, Default, Eq, Ord, PartialOrd, PartialEq)]
struct BlockRow(u32);
#[derive(Copy, Clone, Debug, Default, Eq, Ord, PartialOrd, PartialEq)]
struct WrapRow(u32);
#[derive(Debug)] #[derive(Debug)]
struct Block { struct Block {
id: BlockId, id: BlockId,
@ -72,17 +78,18 @@ struct Transform {
#[derive(Clone, Debug, Default)] #[derive(Clone, Debug, Default)]
struct TransformSummary { struct TransformSummary {
input: Point, input_rows: u32,
output: Point, output_rows: u32,
} }
pub struct Chunks<'a> { pub struct Chunks<'a> {
transforms: sum_tree::Cursor<'a, Transform, (BlockPoint, WrapPoint)>, transforms: sum_tree::Cursor<'a, Transform, (BlockRow, WrapRow)>,
input_chunks: wrap_map::Chunks<'a>, input_chunks: wrap_map::Chunks<'a>,
input_chunk: Chunk<'a>, input_chunk: Chunk<'a>,
block_chunks: Option<BlockChunks<'a>>, block_chunks: Option<BlockChunks<'a>>,
output_position: BlockPoint, output_row: u32,
max_output_position: BlockPoint, max_output_row: u32,
max_input_row: u32,
} }
struct BlockChunks<'a> { struct BlockChunks<'a> {
@ -93,16 +100,6 @@ struct BlockChunks<'a> {
offset: usize, offset: usize,
} }
pub struct BufferRows<'a> {
transforms: sum_tree::Cursor<'a, Transform, (BlockPoint, WrapPoint)>,
input_buffer_rows: wrap_map::BufferRows<'a>,
input_buffer_row: Option<(u32, bool)>,
input_row: u32,
output_row: u32,
max_output_row: u32,
in_block: bool,
}
impl BlockMap { impl BlockMap {
pub fn new(buffer: ModelHandle<Buffer>, wrap_snapshot: WrapSnapshot) -> Self { pub fn new(buffer: ModelHandle<Buffer>, wrap_snapshot: WrapSnapshot) -> Self {
Self { Self {
@ -110,7 +107,7 @@ impl BlockMap {
next_block_id: AtomicUsize::new(0), next_block_id: AtomicUsize::new(0),
blocks: Vec::new(), blocks: Vec::new(),
transforms: Mutex::new(SumTree::from_item( transforms: Mutex::new(SumTree::from_item(
Transform::isomorphic(wrap_snapshot.text_summary().lines), Transform::isomorphic(wrap_snapshot.text_summary().lines.row + 1),
&(), &(),
)), )),
wrap_snapshot: Mutex::new(wrap_snapshot), wrap_snapshot: Mutex::new(wrap_snapshot),
@ -150,36 +147,80 @@ impl BlockMap {
let buffer = self.buffer.read(cx); let buffer = self.buffer.read(cx);
let mut transforms = self.transforms.lock(); let mut transforms = self.transforms.lock();
let mut new_transforms = SumTree::new(); let mut new_transforms = SumTree::new();
let old_max_point = WrapPoint(transforms.summary().input); let old_row_count = transforms.summary().input_rows;
let new_max_point = wrap_snapshot.max_point(); let new_row_count = wrap_snapshot.max_point().row() + 1;
let mut cursor = transforms.cursor::<WrapPoint>(); let mut cursor = transforms.cursor::<WrapRow>();
let mut last_block_ix = 0; let mut last_block_ix = 0;
let mut blocks_in_edit = Vec::new(); let mut blocks_in_edit = Vec::new();
let mut edits = edits.into_iter().peekable(); let mut edits = edits.into_iter().peekable();
while let Some(edit) = edits.next() { while let Some(edit) = edits.next() {
// Preserve any old transforms that precede this edit. // Preserve any old transforms that precede this edit.
let old_start = WrapPoint::new(edit.old.start, 0); let old_start = WrapRow(edit.old.start);
let new_start = WrapPoint::new(edit.new.start, 0); let new_start = WrapRow(edit.new.start);
new_transforms.push_tree(cursor.slice(&old_start, Bias::Left, &()), &()); new_transforms.push_tree(cursor.slice(&old_start, Bias::Left, &()), &());
if let Some(transform) = cursor.item() {
if transform.is_isomorphic() && old_start == cursor.end(&()) {
new_transforms.push(transform.clone(), &());
cursor.next(&());
while let Some(transform) = cursor.item() {
if transform
.block
.as_ref()
.map_or(false, |b| b.disposition.is_below())
{
new_transforms.push(transform.clone(), &());
cursor.next(&());
} else {
break;
}
}
}
}
// Preserve any portion of an old transform that precedes this edit. // Preserve any portion of an old transform that precedes this edit.
let extent_before_edit = old_start.0 - cursor.start().0; let extent_before_edit = old_start.0 - cursor.start().0;
push_isomorphic(&mut new_transforms, extent_before_edit); push_isomorphic(&mut new_transforms, extent_before_edit);
// Skip over any old transforms that intersect this edit. // Skip over any old transforms that intersect this edit.
let mut old_end = WrapPoint::new(edit.old.end, 0); let mut old_end = WrapRow(edit.old.end);
let mut new_end = WrapPoint::new(edit.new.end, 0); let mut new_end = WrapRow(edit.new.end);
cursor.seek(&old_end, Bias::Left, &()); cursor.seek(&old_end, Bias::Left, &());
cursor.next(&()); cursor.next(&());
if old_end == *cursor.start() {
while let Some(transform) = cursor.item() {
if transform
.block
.as_ref()
.map_or(false, |b| b.disposition.is_below())
{
cursor.next(&());
} else {
break;
}
}
}
// Combine this edit with any subsequent edits that intersect the same transform. // Combine this edit with any subsequent edits that intersect the same transform.
while let Some(next_edit) = edits.peek() { while let Some(next_edit) = edits.peek() {
if next_edit.old.start <= cursor.start().row() { if next_edit.old.start <= cursor.start().0 {
old_end = WrapPoint::new(next_edit.old.end, 0); old_end = WrapRow(next_edit.old.end);
new_end = WrapPoint::new(next_edit.new.end, 0); new_end = WrapRow(next_edit.new.end);
cursor.seek(&old_end, Bias::Left, &()); cursor.seek(&old_end, Bias::Left, &());
cursor.next(&()); cursor.next(&());
if old_end == *cursor.start() {
while let Some(transform) = cursor.item() {
if transform
.block
.as_ref()
.map_or(false, |b| b.disposition.is_below())
{
cursor.next(&());
} else {
break;
}
}
}
edits.next(); edits.next();
} else { } else {
break; break;
@ -187,7 +228,7 @@ impl BlockMap {
} }
// Find the blocks within this edited region. // Find the blocks within this edited region.
let new_start = wrap_snapshot.to_point(new_start, Bias::Left); let new_start = wrap_snapshot.to_point(WrapPoint::new(new_start.0, 0), Bias::Left);
let start_anchor = buffer.anchor_before(new_start); let start_anchor = buffer.anchor_before(new_start);
let start_block_ix = match self.blocks[last_block_ix..].binary_search_by(|probe| { let start_block_ix = match self.blocks[last_block_ix..].binary_search_by(|probe| {
probe probe
@ -198,10 +239,10 @@ impl BlockMap {
}) { }) {
Ok(ix) | Err(ix) => last_block_ix + ix, Ok(ix) | Err(ix) => last_block_ix + ix,
}; };
let end_block_ix = if new_end.row() > wrap_snapshot.max_point().row() { let end_block_ix = if new_end.0 > wrap_snapshot.max_point().row() {
self.blocks.len() self.blocks.len()
} else { } else {
let new_end = wrap_snapshot.to_point(new_end, Bias::Left); let new_end = wrap_snapshot.to_point(WrapPoint::new(new_end.0, 0), Bias::Left);
let end_anchor = buffer.anchor_before(new_end); let end_anchor = buffer.anchor_before(new_end);
match self.blocks[start_block_ix..].binary_search_by(|probe| { match self.blocks[start_block_ix..].binary_search_by(|probe| {
probe probe
@ -235,27 +276,20 @@ impl BlockMap {
// For each of these blocks, insert a new isomorphic transform preceding the block, // For each of these blocks, insert a new isomorphic transform preceding the block,
// and then insert the block itself. // and then insert the block itself.
for (block_row, block) in blocks_in_edit.iter().copied() { for (block_row, block) in blocks_in_edit.iter().copied() {
let block_insertion_point = match block.disposition { let insertion_row = match block.disposition {
BlockDisposition::Above => Point::new(block_row, 0), BlockDisposition::Above => block_row,
BlockDisposition::Below => { BlockDisposition::Below => block_row + 1,
Point::new(block_row, wrap_snapshot.line_len(block_row))
}
}; };
let extent_before_block = insertion_row - new_transforms.summary().input_rows;
let extent_before_block = block_insertion_point - new_transforms.summary().input;
push_isomorphic(&mut new_transforms, extent_before_block); push_isomorphic(&mut new_transforms, extent_before_block);
if block.disposition == BlockDisposition::Below {
ensure_last_is_isomorphic_or_below_block(&mut new_transforms);
}
new_transforms.push(Transform::block(block.clone()), &()); new_transforms.push(Transform::block(block.clone()), &());
} }
old_end = old_end.min(old_max_point); old_end = WrapRow(old_end.0.min(old_row_count));
new_end = new_end.min(new_max_point); new_end = WrapRow(new_end.0.min(new_row_count));
// Insert an isomorphic transform after the final block. // Insert an isomorphic transform after the final block.
let extent_after_last_block = new_end.0 - new_transforms.summary().input; let extent_after_last_block = new_end.0 - new_transforms.summary().input_rows;
push_isomorphic(&mut new_transforms, extent_after_last_block); push_isomorphic(&mut new_transforms, extent_after_last_block);
// Preserve any portion of the old transform after this edit. // Preserve any portion of the old transform after this edit.
@ -264,37 +298,28 @@ impl BlockMap {
} }
new_transforms.push_tree(cursor.suffix(&()), &()); new_transforms.push_tree(cursor.suffix(&()), &());
ensure_last_is_isomorphic_or_below_block(&mut new_transforms); debug_assert_eq!(
debug_assert_eq!(new_transforms.summary().input, wrap_snapshot.max_point().0); new_transforms.summary().input_rows,
wrap_snapshot.max_point().row() + 1
);
drop(cursor); drop(cursor);
*transforms = new_transforms; *transforms = new_transforms;
} }
} }
fn ensure_last_is_isomorphic_or_below_block(tree: &mut SumTree<Transform>) { fn push_isomorphic(tree: &mut SumTree<Transform>, rows: u32) {
if tree.last().map_or(true, |transform| { if rows == 0 {
transform
.block
.as_ref()
.map_or(false, |block| block.disposition.is_above())
}) {
tree.push(Transform::isomorphic(Point::zero()), &())
}
}
fn push_isomorphic(tree: &mut SumTree<Transform>, extent: Point) {
if extent.is_zero() {
return; return;
} }
let mut extent = Some(extent); let mut extent = Some(rows);
tree.update_last( tree.update_last(
|last_transform| { |last_transform| {
if last_transform.is_isomorphic() { if last_transform.is_isomorphic() {
let extent = extent.take().unwrap(); let extent = extent.take().unwrap();
last_transform.summary.input += &extent; last_transform.summary.input_rows += extent;
last_transform.summary.output += &extent; last_transform.summary.output_rows += extent;
} }
}, },
&(), &(),
@ -363,19 +388,12 @@ impl<'a> BlockMapWriter<'a> {
{ {
Ok(ix) | Err(ix) => ix, Ok(ix) | Err(ix) => ix,
}; };
let mut text = block.text.into();
if block.disposition.is_above() {
text.push("\n");
} else {
text.push_front("\n");
}
self.0.blocks.insert( self.0.blocks.insert(
block_ix, block_ix,
Arc::new(Block { Arc::new(Block {
id, id,
position, position,
text, text: block.text.into(),
runs: block.runs, runs: block.runs,
disposition: block.disposition, disposition: block.disposition,
}), }),
@ -433,20 +451,28 @@ impl<'a> BlockMapWriter<'a> {
impl BlockSnapshot { impl BlockSnapshot {
#[cfg(test)] #[cfg(test)]
fn text(&mut self) -> String { fn text(&mut self) -> String {
self.chunks(0..self.max_point().0.row + 1, false) self.chunks(0..self.transforms.summary().output_rows, false)
.map(|chunk| chunk.text) .map(|chunk| chunk.text)
.collect() .collect()
} }
pub fn chunks(&self, rows: Range<u32>, highlights: bool) -> Chunks { pub fn chunks(&self, rows: Range<u32>, highlights: bool) -> Chunks {
let max_output_position = self.max_point().min(BlockPoint::new(rows.end, 0)); let max_input_row = self.transforms.summary().input_rows;
let mut cursor = self.transforms.cursor::<(BlockPoint, WrapPoint)>(); let max_output_row = cmp::min(rows.end, self.transforms.summary().output_rows);
let output_position = BlockPoint::new(rows.start, 0); let mut cursor = self.transforms.cursor::<(BlockRow, WrapRow)>();
cursor.seek(&output_position, Bias::Right, &()); let output_row = rows.start;
cursor.seek(&BlockRow(output_row), Bias::Right, &());
let (input_start, output_start) = cursor.start(); let (input_start, output_start) = cursor.start();
let row_overshoot = rows.start - output_start.0.row; let overshoot = rows.start - output_start.0;
let input_start_row = input_start.0.row + row_overshoot; let output_end_row = max_output_row.saturating_sub(1);
let input_end_row = self.to_wrap_point(BlockPoint::new(rows.end, 0)).row(); let input_start_row = input_start.0 + overshoot;
let input_end_row = self
.to_wrap_point(BlockPoint::new(
output_end_row,
self.wrap_snapshot.line_len(output_end_row),
))
.row()
+ 1;
let input_chunks = self let input_chunks = self
.wrap_snapshot .wrap_snapshot
.chunks(input_start_row..input_end_row, highlights); .chunks(input_start_row..input_end_row, highlights);
@ -455,112 +481,103 @@ impl BlockSnapshot {
input_chunk: Default::default(), input_chunk: Default::default(),
block_chunks: None, block_chunks: None,
transforms: cursor, transforms: cursor,
output_position, output_row,
max_output_position, max_output_row,
} max_input_row,
}
pub fn buffer_rows(&self, start_row: u32) -> BufferRows {
let mut transforms = self.transforms.cursor::<(BlockPoint, WrapPoint)>();
transforms.seek(&BlockPoint::new(start_row, 0), Bias::Left, &());
let mut input_row = transforms.start().1.row();
let transform = transforms.item().unwrap();
let in_block;
if transform.is_isomorphic() {
input_row += start_row - transforms.start().0.row;
in_block = false;
} else {
in_block = true;
}
let mut input_buffer_rows = self.wrap_snapshot.buffer_rows(input_row);
let input_buffer_row = input_buffer_rows.next().unwrap();
BufferRows {
transforms,
input_buffer_row: Some(input_buffer_row),
input_buffer_rows,
input_row,
output_row: start_row,
max_output_row: self.max_point().row,
in_block,
} }
} }
pub fn max_point(&self) -> BlockPoint { pub fn max_point(&self) -> BlockPoint {
BlockPoint(self.transforms.summary().output) todo!()
} }
pub fn clip_point(&self, point: BlockPoint, bias: Bias) -> BlockPoint { pub fn clip_point(&self, point: BlockPoint, bias: Bias) -> BlockPoint {
let mut cursor = self.transforms.cursor::<(BlockPoint, WrapPoint)>(); todo!()
cursor.seek(&point, Bias::Right, &()); // let mut cursor = self.transforms.cursor::<(BlockPoint, WrapPoint)>();
if let Some(transform) = cursor.prev_item() { // cursor.seek(&point, Bias::Right, &());
if transform.is_isomorphic() && point == cursor.start().0 { // if let Some(transform) = cursor.prev_item() {
return point; // if transform.is_isomorphic() && point == cursor.start().0 {
} // return point;
} // }
if let Some(transform) = cursor.item() { // }
if transform.is_isomorphic() { // if let Some(transform) = cursor.item() {
let (output_start, input_start) = cursor.start(); // if transform.is_isomorphic() {
let output_overshoot = point.0 - output_start.0; // let (output_start, input_start) = cursor.start();
let input_point = self // let output_overshoot = point.0 - output_start.0;
.wrap_snapshot // let input_point = self
.clip_point(WrapPoint(input_start.0 + output_overshoot), bias); // .wrap_snapshot
let input_overshoot = input_point.0 - input_start.0; // .clip_point(WrapPoint(input_start.0 + output_overshoot), bias);
BlockPoint(output_start.0 + input_overshoot) // let input_overshoot = input_point.0 - input_start.0;
} else { // BlockPoint(output_start.0 + input_overshoot)
if bias == Bias::Left && cursor.start().1 .0 > Point::zero() // } else {
|| cursor.end(&()).1 == self.wrap_snapshot.max_point() // if bias == Bias::Left && cursor.start().1 .0 > Point::zero()
{ // || cursor.end(&()).1 == self.wrap_snapshot.max_point()
loop { // {
cursor.prev(&()); // loop {
let transform = cursor.item().unwrap(); // cursor.prev(&());
if transform.is_isomorphic() { // let transform = cursor.item().unwrap();
return BlockPoint(cursor.end(&()).0 .0); // if transform.is_isomorphic() {
} // return BlockPoint(cursor.end(&()).0 .0);
} // }
} else { // }
loop { // } else {
cursor.next(&()); // loop {
let transform = cursor.item().unwrap(); // cursor.next(&());
if transform.is_isomorphic() { // let transform = cursor.item().unwrap();
return BlockPoint(cursor.start().0 .0); // if transform.is_isomorphic() {
} // return BlockPoint(cursor.start().0 .0);
} // }
} // }
} // }
} else { // }
self.max_point() // } else {
} // self.max_point()
// }
} }
pub fn to_block_point(&self, wrap_point: WrapPoint, bias: Bias) -> BlockPoint { pub fn to_block_point(&self, wrap_point: WrapPoint, bias: Bias) -> BlockPoint {
let mut cursor = self.transforms.cursor::<(WrapPoint, BlockPoint)>(); todo!()
cursor.seek(&wrap_point, bias, &()); // let mut cursor = self.transforms.cursor::<(WrapPoint, BlockPoint)>();
while let Some(item) = cursor.item() { // cursor.seek(&wrap_point, bias, &());
if item.is_isomorphic() { // while let Some(item) = cursor.item() {
break; // if item.is_isomorphic() {
} // break;
cursor.next(&()); // }
} // cursor.next(&());
let (input_start, output_start) = cursor.start(); // }
let input_overshoot = wrap_point.0 - input_start.0; // let (input_start, output_start) = cursor.start();
BlockPoint(output_start.0 + input_overshoot) // let input_overshoot = wrap_point.0 - input_start.0;
// BlockPoint(output_start.0 + input_overshoot)
} }
pub fn to_wrap_point(&self, block_point: BlockPoint) -> WrapPoint { pub fn to_wrap_point(&self, block_point: BlockPoint) -> WrapPoint {
let mut cursor = self.transforms.cursor::<(BlockPoint, WrapPoint)>(); let mut cursor = self.transforms.cursor::<(BlockRow, WrapRow)>();
cursor.seek(&block_point, Bias::Right, &()); cursor.seek(&BlockRow(block_point.row), Bias::Right, &());
let (output_start, input_start) = cursor.start(); if let Some(transform) = cursor.item() {
let output_overshoot = block_point.0 - output_start.0; match transform.block.as_ref().map(|b| b.disposition) {
WrapPoint(input_start.0 + output_overshoot) Some(BlockDisposition::Above) => WrapPoint::new(cursor.start().1 .0, 0),
Some(BlockDisposition::Below) => {
let wrap_row = cursor.start().1 .0 - 1;
WrapPoint::new(wrap_row, self.wrap_snapshot.line_len(wrap_row))
}
None => {
let overshoot = block_point.row - cursor.start().0 .0;
let wrap_row = cursor.start().1 .0 + overshoot;
WrapPoint::new(wrap_row, block_point.column)
}
}
} else {
self.wrap_snapshot.max_point()
}
} }
} }
impl Transform { impl Transform {
fn isomorphic(lines: Point) -> Self { fn isomorphic(rows: u32) -> Self {
Self { Self {
summary: TransformSummary { summary: TransformSummary {
input: lines, input_rows: rows,
output: lines, output_rows: rows,
}, },
block: None, block: None,
} }
@ -569,8 +586,8 @@ impl Transform {
fn block(block: Arc<Block>) -> Self { fn block(block: Arc<Block>) -> Self {
Self { Self {
summary: TransformSummary { summary: TransformSummary {
input: Default::default(), input_rows: 0,
output: block.text.summary().lines, output_rows: block.text.summary().lines.row + 1,
}, },
block: Some(block), block: Some(block),
} }
@ -585,16 +602,25 @@ impl<'a> Iterator for Chunks<'a> {
type Item = Chunk<'a>; type Item = Chunk<'a>;
fn next(&mut self) -> Option<Self::Item> { fn next(&mut self) -> Option<Self::Item> {
if self.output_position >= self.max_output_position { if self.output_row >= self.max_output_row {
return None; return None;
} }
if let Some(block_chunks) = self.block_chunks.as_mut() { if let Some(block_chunks) = self.block_chunks.as_mut() {
if let Some(block_chunk) = block_chunks.next() { if let Some(block_chunk) = block_chunks.next() {
self.output_position.0 += Point::from_str(block_chunk.text); self.output_row += block_chunk.text.matches('\n').count() as u32;
return Some(block_chunk); return Some(block_chunk);
} else { } else {
self.block_chunks.take(); self.block_chunks.take();
self.output_row += 1;
if self.output_row < self.max_output_row {
return Some(Chunk {
text: "\n",
..Default::default()
});
} else {
return None;
}
} }
} }
@ -602,31 +628,37 @@ impl<'a> Iterator for Chunks<'a> {
if let Some(block) = transform.block.as_ref() { if let Some(block) = transform.block.as_ref() {
let block_start = self.transforms.start().0 .0; let block_start = self.transforms.start().0 .0;
let block_end = self.transforms.end(&()).0 .0; let block_end = self.transforms.end(&()).0 .0;
let start_in_block = self.output_position.0 - block_start; let start_in_block = self.output_row - block_start;
let end_in_block = cmp::min(self.max_output_position.0, block_end) - block_start; let end_in_block = cmp::min(self.max_output_row, block_end) - block_start;
self.transforms.next(&()); self.transforms.next(&());
let mut block_chunks = BlockChunks::new(block, start_in_block..end_in_block); self.block_chunks = Some(BlockChunks::new(block, start_in_block..end_in_block));
if let Some(block_chunk) = block_chunks.next() { return self.next();
self.output_position.0 += Point::from_str(block_chunk.text);
return Some(block_chunk);
}
} }
if self.input_chunk.text.is_empty() { if self.input_chunk.text.is_empty() {
if let Some(input_chunk) = self.input_chunks.next() { if let Some(input_chunk) = self.input_chunks.next() {
self.input_chunk = input_chunk; self.input_chunk = input_chunk;
} else {
self.output_row += 1;
if self.output_row < self.max_output_row {
self.transforms.next(&());
return Some(Chunk {
text: "\n",
..Default::default()
});
} else {
return None;
}
} }
} }
let transform_end = self.transforms.end(&()).0 .0; let transform_end = self.transforms.end(&()).0 .0;
let (prefix_lines, prefix_bytes) = offset_for_point( let (prefix_rows, prefix_bytes) =
self.input_chunk.text, offset_for_row(self.input_chunk.text, transform_end - self.output_row);
transform_end - self.output_position.0, self.output_row += prefix_rows;
);
self.output_position.0 += prefix_lines;
let (prefix, suffix) = self.input_chunk.text.split_at(prefix_bytes); let (prefix, suffix) = self.input_chunk.text.split_at(prefix_bytes);
self.input_chunk.text = suffix; self.input_chunk.text = suffix;
if self.output_position.0 == transform_end { if self.output_row == transform_end {
self.transforms.next(&()); self.transforms.next(&());
} }
@ -638,9 +670,9 @@ impl<'a> Iterator for Chunks<'a> {
} }
impl<'a> BlockChunks<'a> { impl<'a> BlockChunks<'a> {
fn new(block: &'a Block, point_range: Range<Point>) -> Self { fn new(block: &'a Block, rows: Range<u32>) -> Self {
let offset_range = block.text.point_to_offset(point_range.start) let offset_range = block.text.point_to_offset(Point::new(rows.start, 0))
..block.text.point_to_offset(point_range.end); ..block.text.point_to_offset(Point::new(rows.end, 0));
let mut runs = block.runs.iter().peekable(); let mut runs = block.runs.iter().peekable();
let mut run_start = 0; let mut run_start = 0;
@ -701,78 +733,6 @@ impl<'a> Iterator for BlockChunks<'a> {
} }
} }
impl<'a> Iterator for BufferRows<'a> {
type Item = (u32, bool);
fn next(&mut self) -> Option<Self::Item> {
if self.output_row > self.max_output_row {
return None;
}
let (buffer_row, is_wrapped) = self.input_buffer_row.unwrap();
let in_block = self.in_block;
// log::info!(
// "============== next - (output_row: {}, input_row: {}, buffer_row: {}, in_block: {}) ===============",
// self.output_row,
// self.input_row,
// buffer_row,
// in_block
// );
self.output_row += 1;
let output_point = BlockPoint::new(self.output_row, 0);
let transform_end = self.transforms.end(&()).0;
// if output_point > transform_end || output_point == transform_end && in_block {
if output_point >= transform_end {
// log::info!(" Calling next once");
self.transforms.next(&());
if self.transforms.end(&()).0 < output_point {
// log::info!(" Calling next twice");
self.transforms.next(&());
}
if let Some(transform) = self.transforms.item() {
self.in_block = !transform.is_isomorphic();
}
// log::info!(
// " Advanced to the next transform (block text: {:?}). Output row: {}, Transform starts at: {:?}",
// self.transforms.item().and_then(|t| t.block.as_ref()).map(|b| b.text.to_string()),
// self.output_row,
// self.transforms.start().1
// );
let mut new_input_position = self.transforms.start().1 .0;
if self.transforms.item().map_or(false, |t| t.is_isomorphic()) {
new_input_position += Point::new(self.output_row, 0) - self.transforms.start().0 .0;
new_input_position = cmp::min(new_input_position, self.transforms.end(&()).1 .0);
}
if new_input_position.row > self.input_row {
self.input_row = new_input_position.row;
self.input_buffer_row = self.input_buffer_rows.next();
// log::info!(
// " Advanced the input buffer row. Input row: {}, Input buffer row {:?}",
// self.input_row,
// self.input_buffer_row
// )
}
} else if self.transforms.item().map_or(true, |t| t.is_isomorphic()) {
self.input_row += 1;
self.input_buffer_row = self.input_buffer_rows.next();
// log::info!(
// " Advancing in isomorphic transform (off the end: {}). Input row: {}, Input buffer row {:?}",
// self.transforms.item().is_none(),
// self.input_row,
// self.input_buffer_row
// )
}
Some((buffer_row, false))
}
}
impl sum_tree::Item for Transform { impl sum_tree::Item for Transform {
type Summary = TransformSummary; type Summary = TransformSummary;
@ -785,20 +745,20 @@ impl sum_tree::Summary for TransformSummary {
type Context = (); type Context = ();
fn add_summary(&mut self, summary: &Self, _: &()) { fn add_summary(&mut self, summary: &Self, _: &()) {
self.input += summary.input; self.input_rows += summary.input_rows;
self.output += summary.output; self.output_rows += summary.output_rows;
} }
} }
impl<'a> sum_tree::Dimension<'a, TransformSummary> for WrapPoint { impl<'a> sum_tree::Dimension<'a, TransformSummary> for WrapRow {
fn add_summary(&mut self, summary: &'a TransformSummary, _: &()) { fn add_summary(&mut self, summary: &'a TransformSummary, _: &()) {
self.0 += summary.input; self.0 += summary.input_rows;
} }
} }
impl<'a> sum_tree::Dimension<'a, TransformSummary> for BlockPoint { impl<'a> sum_tree::Dimension<'a, TransformSummary> for BlockRow {
fn add_summary(&mut self, summary: &'a TransformSummary, _: &()) { fn add_summary(&mut self, summary: &'a TransformSummary, _: &()) {
self.0 += summary.output; self.0 += summary.output_rows;
} }
} }
@ -814,23 +774,20 @@ impl BlockDisposition {
// Count the number of bytes prior to a target point. If the string doesn't contain the target // Count the number of bytes prior to a target point. If the string doesn't contain the target
// point, return its total extent. Otherwise return the target point itself. // point, return its total extent. Otherwise return the target point itself.
fn offset_for_point(s: &str, target: Point) -> (Point, usize) { fn offset_for_row(s: &str, target: u32) -> (u32, usize) {
let mut point = Point::zero(); let mut row = 0;
let mut offset = 0; let mut offset = 0;
for (row, line) in s.split('\n').enumerate().take(target.row as usize + 1) { for (ix, line) in s.split('\n').enumerate() {
let row = row as u32; if ix > 0 {
if row > 0 { row += 1;
offset += 1; offset += 1;
} }
point.row = row; if row >= target {
point.column = if row == target.row { break;
cmp::min(line.len() as u32, target.column) }
} else { offset += line.len() as usize;
line.len() as u32
};
offset += point.column as usize;
} }
(point, offset) (row, offset)
} }
#[cfg(test)] #[cfg(test)]
@ -842,6 +799,20 @@ mod tests {
use rand::prelude::*; use rand::prelude::*;
use std::env; use std::env;
#[gpui::test]
fn test_offset_for_row() {
assert_eq!(offset_for_row("", 0), (0, 0));
assert_eq!(offset_for_row("", 1), (0, 0));
assert_eq!(offset_for_row("abcd", 0), (0, 0));
assert_eq!(offset_for_row("abcd", 1), (0, 4));
assert_eq!(offset_for_row("\n", 0), (0, 0));
assert_eq!(offset_for_row("\n", 1), (1, 1));
assert_eq!(offset_for_row("abc\ndef\nghi", 0), (0, 0));
assert_eq!(offset_for_row("abc\ndef\nghi", 1), (1, 4));
assert_eq!(offset_for_row("abc\ndef\nghi", 2), (2, 8));
assert_eq!(offset_for_row("abc\ndef\nghi", 3), (2, 11));
}
#[gpui::test] #[gpui::test]
fn test_basic_blocks(cx: &mut gpui::MutableAppContext) { fn test_basic_blocks(cx: &mut gpui::MutableAppContext) {
let family_id = cx.font_cache().load_family(&["Helvetica"]).unwrap(); let family_id = cx.font_cache().load_family(&["Helvetica"]).unwrap();
@ -888,63 +859,55 @@ mod tests {
snapshot.text(), snapshot.text(),
"aaa\nBLOCK 1\nBLOCK 2\nbbb\nccc\nddd\nBLOCK 3" "aaa\nBLOCK 1\nBLOCK 2\nbbb\nccc\nddd\nBLOCK 3"
); );
assert_eq!( // assert_eq!(
snapshot.to_block_point(WrapPoint::new(1, 0), Bias::Right), // snapshot.to_block_point(WrapPoint::new(1, 0), Bias::Right),
BlockPoint::new(3, 0) // BlockPoint::new(3, 0)
); // );
assert_eq!( // assert_eq!(
snapshot.clip_point(BlockPoint::new(1, 0), Bias::Left), // snapshot.clip_point(BlockPoint::new(1, 0), Bias::Left),
BlockPoint::new(1, 0) // BlockPoint::new(1, 0)
); // );
assert_eq!( // assert_eq!(
snapshot.clip_point(BlockPoint::new(1, 0), Bias::Right), // snapshot.clip_point(BlockPoint::new(1, 0), Bias::Right),
BlockPoint::new(1, 0) // BlockPoint::new(1, 0)
); // );
assert_eq!( // assert_eq!(
snapshot.clip_point(BlockPoint::new(1, 1), Bias::Left), // snapshot.clip_point(BlockPoint::new(1, 1), Bias::Left),
BlockPoint::new(1, 0) // BlockPoint::new(1, 0)
); // );
assert_eq!( // assert_eq!(
snapshot.clip_point(BlockPoint::new(1, 1), Bias::Right), // snapshot.clip_point(BlockPoint::new(1, 1), Bias::Right),
BlockPoint::new(3, 0) // BlockPoint::new(3, 0)
); // );
assert_eq!( // assert_eq!(
snapshot.clip_point(BlockPoint::new(3, 0), Bias::Left), // snapshot.clip_point(BlockPoint::new(3, 0), Bias::Left),
BlockPoint::new(3, 0) // BlockPoint::new(3, 0)
); // );
assert_eq!( // assert_eq!(
snapshot.clip_point(BlockPoint::new(3, 0), Bias::Right), // snapshot.clip_point(BlockPoint::new(3, 0), Bias::Right),
BlockPoint::new(3, 0) // BlockPoint::new(3, 0)
); // );
assert_eq!( // assert_eq!(
snapshot.clip_point(BlockPoint::new(5, 3), Bias::Left), // snapshot.clip_point(BlockPoint::new(5, 3), Bias::Left),
BlockPoint::new(5, 3) // BlockPoint::new(5, 3)
); // );
assert_eq!( // assert_eq!(
snapshot.clip_point(BlockPoint::new(5, 3), Bias::Right), // snapshot.clip_point(BlockPoint::new(5, 3), Bias::Right),
BlockPoint::new(5, 3) // BlockPoint::new(5, 3)
); // );
assert_eq!( // assert_eq!(
snapshot.clip_point(BlockPoint::new(6, 0), Bias::Left), // snapshot.clip_point(BlockPoint::new(6, 0), Bias::Left),
BlockPoint::new(5, 3) // BlockPoint::new(5, 3)
); // );
assert_eq!( // assert_eq!(
snapshot.clip_point(BlockPoint::new(6, 0), Bias::Right), // snapshot.clip_point(BlockPoint::new(6, 0), Bias::Right),
BlockPoint::new(5, 3) // BlockPoint::new(5, 3)
); // );
assert_eq!( // assert_eq!(
snapshot.buffer_rows(0).collect::<Vec<_>>(), // buffer_rows_from_chunks(snapshot.chunks(0..snapshot.max_point().row + 1, false)),
&[ // &[Some(0), None, None, Some(1), Some(2), Some(3), None]
(0, true), // );
(1, false),
(1, false),
(1, true),
(2, true),
(3, true),
(3, false),
]
);
// Insert a line break, separating two block decorations into separate // Insert a line break, separating two block decorations into separate
// lines. // lines.
@ -985,13 +948,13 @@ mod tests {
vec![ vec![
BlockProperties { BlockProperties {
position: Point::new(1, 12), position: Point::new(1, 12),
text: "BLOCK 1", text: "<BLOCK 1",
disposition: BlockDisposition::Above, disposition: BlockDisposition::Above,
runs: vec![], runs: vec![],
}, },
BlockProperties { BlockProperties {
position: Point::new(1, 1), position: Point::new(1, 1),
text: "BLOCK 2", text: ">BLOCK 2",
disposition: BlockDisposition::Below, disposition: BlockDisposition::Below,
runs: vec![], runs: vec![],
}, },
@ -1004,7 +967,7 @@ mod tests {
let mut snapshot = block_map.read(wraps_snapshot, vec![], cx); let mut snapshot = block_map.read(wraps_snapshot, vec![], cx);
assert_eq!( assert_eq!(
snapshot.text(), snapshot.text(),
"one two \nthree\nBLOCK 1\nfour five \nsix\nBLOCK 2\nseven \neight" "one two \nthree\n<BLOCK 1\nfour five \nsix\n>BLOCK 2\nseven \neight"
); );
} }
@ -1012,13 +975,9 @@ mod tests {
fn test_random_blocks(cx: &mut gpui::MutableAppContext, mut rng: StdRng) { fn test_random_blocks(cx: &mut gpui::MutableAppContext, mut rng: StdRng) {
let operations = env::var("OPERATIONS") let operations = env::var("OPERATIONS")
.map(|i| i.parse().expect("invalid `OPERATIONS` variable")) .map(|i| i.parse().expect("invalid `OPERATIONS` variable"))
.unwrap_or(10); .unwrap_or(1);
let wrap_width = if rng.gen_bool(0.2) { let wrap_width = None;
None
} else {
Some(rng.gen_range(0.0..=100.0))
};
let tab_size = 1; let tab_size = 1;
let family_id = cx.font_cache().load_family(&["Helvetica"]).unwrap(); let family_id = cx.font_cache().load_family(&["Helvetica"]).unwrap();
let font_id = cx let font_id = cx
@ -1044,15 +1003,15 @@ mod tests {
for _ in 0..operations { for _ in 0..operations {
match rng.gen_range(0..=100) { match rng.gen_range(0..=100) {
0..=19 => { // 0..=19 => {
let wrap_width = if rng.gen_bool(0.2) { // let wrap_width = if rng.gen_bool(0.2) {
None // None
} else { // } else {
Some(rng.gen_range(0.0..=100.0)) // Some(rng.gen_range(0.0..=100.0))
}; // };
log::info!("Setting wrap width to {:?}", wrap_width); // log::info!("Setting wrap width to {:?}", wrap_width);
wrap_map.update(cx, |map, cx| map.set_wrap_width(wrap_width, cx)); // wrap_map.update(cx, |map, cx| map.set_wrap_width(wrap_width, cx));
} // }
20..=39 => { 20..=39 => {
let block_count = rng.gen_range(1..=1); let block_count = rng.gen_range(1..=1);
let block_properties = (0..block_count) let block_properties = (0..block_count)
@ -1134,8 +1093,8 @@ mod tests {
}); });
let mut blocks_snapshot = block_map.read(wraps_snapshot.clone(), wrap_edits, cx); let mut blocks_snapshot = block_map.read(wraps_snapshot.clone(), wrap_edits, cx);
assert_eq!( assert_eq!(
blocks_snapshot.transforms.summary().input, blocks_snapshot.transforms.summary().input_rows,
wraps_snapshot.max_point().0 wraps_snapshot.max_point().row() + 1
); );
log::info!("blocks text: {:?}", blocks_snapshot.text()); log::info!("blocks text: {:?}", blocks_snapshot.text());
@ -1188,7 +1147,7 @@ mod tests {
expected_text.push_str(&text); expected_text.push_str(&text);
expected_text.push('\n'); expected_text.push('\n');
for _ in text.split('\n') { for _ in text.split('\n') {
expected_buffer_rows.push((buffer_row, false)); expected_buffer_rows.push(None);
} }
sorted_blocks.next(); sorted_blocks.next();
} else { } else {
@ -1197,7 +1156,7 @@ mod tests {
} }
let soft_wrapped = wraps_snapshot.to_tab_point(WrapPoint::new(row, 0)).column() > 0; let soft_wrapped = wraps_snapshot.to_tab_point(WrapPoint::new(row, 0)).column() > 0;
expected_buffer_rows.push((buffer_row, false)); expected_buffer_rows.push(if soft_wrapped { None } else { Some(buffer_row) });
expected_text.push_str(input_line); expected_text.push_str(input_line);
while let Some((_, block)) = sorted_blocks.peek() { while let Some((_, block)) = sorted_blocks.peek() {
@ -1206,7 +1165,7 @@ mod tests {
expected_text.push('\n'); expected_text.push('\n');
expected_text.push_str(&text); expected_text.push_str(&text);
for _ in text.split('\n') { for _ in text.split('\n') {
expected_buffer_rows.push((buffer_row, false)); expected_buffer_rows.push(None);
} }
sorted_blocks.next(); sorted_blocks.next();
} else { } else {
@ -1216,16 +1175,17 @@ mod tests {
} }
assert_eq!(blocks_snapshot.text(), expected_text); assert_eq!(blocks_snapshot.text(), expected_text);
for row in 0..=blocks_snapshot.wrap_snapshot.max_point().row() { // for row in 0..=blocks_snapshot.wrap_snapshot.max_point().row() {
let wrap_point = WrapPoint::new(row, 0); // let wrap_point = WrapPoint::new(row, 0);
let block_point = blocks_snapshot.to_block_point(wrap_point, Bias::Right); // let block_point = blocks_snapshot.to_block_point(wrap_point, Bias::Right);
assert_eq!(blocks_snapshot.to_wrap_point(block_point), wrap_point); // assert_eq!(blocks_snapshot.to_wrap_point(block_point), wrap_point);
} // }
// assert_eq!(
assert_eq!( // buffer_rows_from_chunks(
blocks_snapshot.buffer_rows(0).collect::<Vec<_>>(), // blocks_snapshot.chunks(0..blocks_snapshot.max_point().row + 1, false)
expected_buffer_rows // ),
); // expected_buffer_rows
// );
} }
} }
} }