use super::{ wrap_map::{self, WrapEdit, WrapPoint, WrapSnapshot}, Highlights,};use crate::{EditorStyle, GutterDimensions};use collections::{Bound, HashMap, HashSet};use gpui::{AnyElement, Pixels, WindowContext};use language::{BufferSnapshot, Chunk, Patch, Point};use multi_buffer::{Anchor, ExcerptId, ExcerptRange, MultiBufferRow, ToPoint as _};use parking_lot::Mutex;use std::{ cell::RefCell, cmp::{self, Ordering}, fmt::Debug, ops::{Deref, DerefMut, Range, RangeBounds}, sync::{ atomic::{AtomicUsize, Ordering::SeqCst}, Arc, },};use sum_tree::{Bias, SumTree};use text::Edit; const NEWLINES: &[u8] = &[b'\n'; u8::MAX as usize]; /// Tracks custom blocks such as diagnostics that should be displayed within buffer.////// See the [`display_map` module documentation](crate::display_map) for more information.pub struct BlockMap { next_block_id: AtomicUsize, wrap_snapshot: RefCell<WrapSnapshot>, blocks: Vec<Arc<Block>>, transforms: RefCell<SumTree<Transform>>, show_excerpt_controls: bool, buffer_header_height: u8, excerpt_header_height: u8, excerpt_footer_height: u8,} pub struct BlockMapReader<'a> { blocks: &'a Vec<Arc<Block>>, pub snapshot: BlockSnapshot,} pub struct BlockMapWriter<'a>(&'a mut BlockMap); #[derive(Clone)]pub struct BlockSnapshot { wrap_snapshot: WrapSnapshot, transforms: SumTree<Transform>,} #[derive(Clone, Copy, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]pub struct BlockId(usize); #[derive(Copy, Clone, Debug, Default, Eq, Ord, PartialOrd, PartialEq)]pub struct BlockPoint(pub Point); #[derive(Copy, Clone, Debug, Default, Eq, Ord, PartialOrd, PartialEq)]pub struct BlockRow(pub(super) u32); #[derive(Copy, Clone, Debug, Default, Eq, Ord, PartialOrd, PartialEq)]struct WrapRow(u32); pub type RenderBlock = Box<dyn Send + Fn(&mut BlockContext) -> AnyElement>; pub struct Block { id: BlockId, position: Anchor, height: u8, style: BlockStyle, render: Mutex<RenderBlock>, disposition: BlockDisposition,} pub struct BlockProperties<P> { pub position: P, pub height: u8, pub style: BlockStyle, pub render: Box<dyn Send + Fn(&mut BlockContext) -> AnyElement>, pub disposition: BlockDisposition,} #[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd)]pub enum BlockStyle { Fixed, Flex, Sticky,} pub struct BlockContext<'a, 'b> { pub context: &'b mut WindowContext<'a>, pub anchor_x: Pixels, pub max_width: Pixels, pub gutter_dimensions: &'b GutterDimensions, pub em_width: Pixels, pub line_height: Pixels, pub block_id: usize, pub editor_style: &'b EditorStyle,} /// Whether the block should be considered above or below the anchor line#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]pub enum BlockDisposition { Above, Below,} #[derive(Clone, Debug)]struct Transform { summary: TransformSummary, block: Option<TransformBlock>,} pub(crate) enum BlockType { Custom(BlockId), Header, Footer,} pub(crate) trait BlockLike { fn block_type(&self) -> BlockType; fn disposition(&self) -> BlockDisposition;} #[allow(clippy::large_enum_variant)]#[derive(Clone)]pub enum TransformBlock { Custom(Arc<Block>), ExcerptHeader { id: ExcerptId, buffer: BufferSnapshot, range: ExcerptRange<text::Anchor>, height: u8, starts_new_buffer: bool, show_excerpt_controls: bool, }, ExcerptFooter { id: ExcerptId, disposition: BlockDisposition, height: u8, },} impl BlockLike for TransformBlock { fn block_type(&self) -> BlockType { match self { TransformBlock::Custom(block) => BlockType::Custom(block.id), TransformBlock::ExcerptHeader { .. } => BlockType::Header, TransformBlock::ExcerptFooter { .. } => BlockType::Footer, } } fn disposition(&self) -> BlockDisposition { self.disposition() }} impl TransformBlock { fn disposition(&self) -> BlockDisposition { match self { TransformBlock::Custom(block) => block.disposition, TransformBlock::ExcerptHeader { .. } => BlockDisposition::Above, TransformBlock::ExcerptFooter { disposition, .. } => *disposition, } } pub fn height(&self) -> u8 { match self { TransformBlock::Custom(block) => block.height, TransformBlock::ExcerptHeader { height, .. } => *height, TransformBlock::ExcerptFooter { height, .. } => *height, } }} impl Debug for TransformBlock { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { match self { Self::Custom(block) => f.debug_struct("Custom").field("block", block).finish(), Self::ExcerptHeader { buffer, starts_new_buffer, id, .. } => f .debug_struct("ExcerptHeader") .field("id", &id) .field("path", &buffer.file().map(|f| f.path())) .field("starts_new_buffer", &starts_new_buffer) .finish(), TransformBlock::ExcerptFooter { id, disposition, .. } => f .debug_struct("ExcerptFooter") .field("id", &id) .field("disposition", &disposition) .finish(), } }} #[derive(Clone, Debug, Default)]struct TransformSummary { input_rows: u32, output_rows: u32,} pub struct BlockChunks<'a> { transforms: sum_tree::Cursor<'a, Transform, (BlockRow, WrapRow)>, input_chunks: wrap_map::WrapChunks<'a>, input_chunk: Chunk<'a>, output_row: u32, max_output_row: u32,} #[derive(Clone)]pub struct BlockBufferRows<'a> { transforms: sum_tree::Cursor<'a, Transform, (BlockRow, WrapRow)>, input_buffer_rows: wrap_map::WrapBufferRows<'a>, output_row: BlockRow, started: bool,} impl BlockMap { pub fn new( wrap_snapshot: WrapSnapshot, show_excerpt_controls: bool, buffer_header_height: u8, excerpt_header_height: u8, excerpt_footer_height: u8, ) -> Self { let row_count = wrap_snapshot.max_point().row() + 1; let map = Self { next_block_id: AtomicUsize::new(0), blocks: Vec::new(), transforms: RefCell::new(SumTree::from_item(Transform::isomorphic(row_count), &())), wrap_snapshot: RefCell::new(wrap_snapshot.clone()), show_excerpt_controls, buffer_header_height, excerpt_header_height, excerpt_footer_height, }; map.sync( &wrap_snapshot, Patch::new(vec![Edit { old: 0..row_count, new: 0..row_count, }]), ); map } pub fn read(&self, wrap_snapshot: WrapSnapshot, edits: Patch<u32>) -> BlockMapReader { self.sync(&wrap_snapshot, edits); *self.wrap_snapshot.borrow_mut() = wrap_snapshot.clone(); BlockMapReader { blocks: &self.blocks, snapshot: BlockSnapshot { wrap_snapshot, transforms: self.transforms.borrow().clone(), }, } } pub fn write(&mut self, wrap_snapshot: WrapSnapshot, edits: Patch<u32>) -> BlockMapWriter { self.sync(&wrap_snapshot, edits); *self.wrap_snapshot.borrow_mut() = wrap_snapshot; BlockMapWriter(self) } fn sync(&self, wrap_snapshot: &WrapSnapshot, mut edits: Patch<u32>) { let buffer = wrap_snapshot.buffer_snapshot(); // Handle changing the last excerpt if it is empty. if buffer.trailing_excerpt_update_count() != self .wrap_snapshot .borrow() .buffer_snapshot() .trailing_excerpt_update_count() { let max_point = wrap_snapshot.max_point(); let edit_start = wrap_snapshot.prev_row_boundary(max_point); let edit_end = max_point.row() + 1; edits = edits.compose([WrapEdit { old: edit_start..edit_end, new: edit_start..edit_end, }]); } let edits = edits.into_inner(); if edits.is_empty() { return; } let mut transforms = self.transforms.borrow_mut(); let mut new_transforms = SumTree::new(); 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 last_block_ix = 0; let mut blocks_in_edit = Vec::new(); let mut edits = edits.into_iter().peekable(); while let Some(edit) = edits.next() { // Preserve any old transforms that precede this edit. let old_start = WrapRow(edit.old.start); let new_start = WrapRow(edit.new.start); new_transforms.append(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. let extent_before_edit = old_start.0 - cursor.start().0; push_isomorphic(&mut new_transforms, extent_before_edit); // Skip over any old transforms that intersect this edit. let mut old_end = WrapRow(edit.old.end); let mut new_end = WrapRow(edit.new.end); cursor.seek(&old_end, Bias::Left, &()); 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. while let Some(next_edit) = edits.peek() { if next_edit.old.start <= cursor.start().0 { old_end = WrapRow(next_edit.old.end); new_end = WrapRow(next_edit.new.end); cursor.seek(&old_end, Bias::Left, &()); 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(); } else { break; } } // Find the blocks within this edited region. let new_buffer_start = wrap_snapshot.to_point(WrapPoint::new(new_start.0, 0), Bias::Left); let start_bound = Bound::Included(new_buffer_start); let start_block_ix = match self.blocks[last_block_ix..].binary_search_by(|probe| { probe .position .to_point(buffer) .cmp(&new_buffer_start) .then(Ordering::Greater) }) { Ok(ix) | Err(ix) => last_block_ix + ix, }; let end_bound; let end_block_ix = if new_end.0 > wrap_snapshot.max_point().row() { end_bound = Bound::Unbounded; self.blocks.len() } else { let new_buffer_end = wrap_snapshot.to_point(WrapPoint::new(new_end.0, 0), Bias::Left); end_bound = Bound::Excluded(new_buffer_end); match self.blocks[start_block_ix..].binary_search_by(|probe| { probe .position .to_point(buffer) .cmp(&new_buffer_end) .then(Ordering::Greater) }) { Ok(ix) | Err(ix) => start_block_ix + ix, } }; last_block_ix = end_block_ix; debug_assert!(blocks_in_edit.is_empty()); blocks_in_edit.extend( self.blocks[start_block_ix..end_block_ix] .iter() .map(|block| { let mut position = block.position.to_point(buffer); match block.disposition { BlockDisposition::Above => position.column = 0, BlockDisposition::Below => { position.column = buffer.line_len(MultiBufferRow(position.row)) } } let position = wrap_snapshot.make_wrap_point(position, Bias::Left); (position.row(), TransformBlock::Custom(block.clone())) }), ); if buffer.show_headers() { blocks_in_edit.extend(BlockMap::header_blocks( self.show_excerpt_controls, self.excerpt_footer_height, self.buffer_header_height, self.excerpt_header_height, buffer, (start_bound, end_bound), wrap_snapshot, )); } BlockMap::sort_blocks(&mut blocks_in_edit); // For each of these blocks, insert a new isomorphic transform preceding the block, // and then insert the block itself. for (block_row, block) in blocks_in_edit.drain(..) { let insertion_row = match block.disposition() { BlockDisposition::Above => block_row, BlockDisposition::Below => block_row + 1, }; let extent_before_block = insertion_row - new_transforms.summary().input_rows; push_isomorphic(&mut new_transforms, extent_before_block); new_transforms.push(Transform::block(block), &()); } old_end = WrapRow(old_end.0.min(old_row_count)); new_end = WrapRow(new_end.0.min(new_row_count)); // Insert an isomorphic transform after the final block. let extent_after_last_block = new_end.0 - new_transforms.summary().input_rows; push_isomorphic(&mut new_transforms, extent_after_last_block); // Preserve any portion of the old transform after this edit. let extent_after_edit = cursor.start().0 - old_end.0; push_isomorphic(&mut new_transforms, extent_after_edit); } new_transforms.append(cursor.suffix(&()), &()); debug_assert_eq!( new_transforms.summary().input_rows, wrap_snapshot.max_point().row() + 1 ); drop(cursor); *transforms = new_transforms; } pub fn replace_renderers(&mut self, mut renderers: HashMap<BlockId, RenderBlock>) { for block in &mut self.blocks { if let Some(render) = renderers.remove(&block.id) { *block.render.lock() = render; } } } pub fn show_excerpt_controls(&self) -> bool { self.show_excerpt_controls } pub fn header_blocks<'a, 'b: 'a, 'c: 'a + 'b, R, T>( show_excerpt_controls: bool, excerpt_footer_height: u8, buffer_header_height: u8, excerpt_header_height: u8, buffer: &'b multi_buffer::MultiBufferSnapshot, range: R, wrap_snapshot: &'c WrapSnapshot, ) -> impl Iterator<Item = (u32, TransformBlock)> + 'b where R: RangeBounds<T>,Lines 1–500 of 2040. 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use super::{ wrap_map::{self, WrapEdit, WrapPoint, WrapSnapshot}, Highlights, }; use crate::{EditorStyle, GutterDimensions}; use collections::{Bound, HashMap, HashSet}; use gpui::{AnyElement, Pixels, WindowContext}; use language::{BufferSnapshot, Chunk, Patch, Point}; use multi_buffer::{Anchor, ExcerptId, ExcerptRange, MultiBufferRow, ToPoint as _}; use parking_lot::Mutex; use std::{ cell::RefCell, cmp::{self, Ordering}, fmt::Debug, ops::{Deref, DerefMut, Range, RangeBounds}, sync::{ atomic::{AtomicUsize, Ordering::SeqCst}, Arc, }, }; use sum_tree::{Bias, SumTree}; use text::Edit; const NEWLINES: &[u8] = &[b'\n'; u8::MAX as usize]; /// Tracks custom blocks such as diagnostics that should be displayed within buffer. /// /// See the [`display_map` module documentation](crate::display_map) for more information. pub struct BlockMap { next_block_id: AtomicUsize, wrap_snapshot: RefCell<WrapSnapshot>, blocks: Vec<Arc<Block>>, transforms: RefCell<SumTree<Transform>>, show_excerpt_controls: bool, buffer_header_height: u8, excerpt_header_height: u8, excerpt_footer_height: u8, } pub struct BlockMapReader<'a> { blocks: &'a Vec<Arc<Block>>, pub snapshot: BlockSnapshot, } pub struct BlockMapWriter<'a>(&'a mut BlockMap); #[derive(Clone)] pub struct BlockSnapshot { wrap_snapshot: WrapSnapshot, transforms: SumTree<Transform>, } #[derive(Clone, Copy, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)] pub struct BlockId(usize); #[derive(Copy, Clone, Debug, Default, Eq, Ord, PartialOrd, PartialEq)] pub struct BlockPoint(pub Point); #[derive(Copy, Clone, Debug, Default, Eq, Ord, PartialOrd, PartialEq)] pub struct BlockRow(pub(super) u32); #[derive(Copy, Clone, Debug, Default, Eq, Ord, PartialOrd, PartialEq)] struct WrapRow(u32); pub type RenderBlock = Box<dyn Send + Fn(&mut BlockContext) -> AnyElement>; pub struct Block { id: BlockId, position: Anchor, height: u8, style: BlockStyle, render: Mutex<RenderBlock>, disposition: BlockDisposition, } pub struct BlockProperties<P> { pub position: P, pub height: u8, pub style: BlockStyle, pub render: Box<dyn Send + Fn(&mut BlockContext) -> AnyElement>, pub disposition: BlockDisposition, } #[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd)] pub enum BlockStyle { Fixed, Flex, Sticky, } pub struct BlockContext<'a, 'b> { pub context: &'b mut WindowContext<'a>, pub anchor_x: Pixels, pub max_width: Pixels, pub gutter_dimensions: &'b GutterDimensions, pub em_width: Pixels, pub line_height: Pixels, pub block_id: usize, pub editor_style: &'b EditorStyle, } /// Whether the block should be considered above or below the anchor line #[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)] pub enum BlockDisposition { Above, Below, } #[derive(Clone, Debug)] struct Transform { summary: TransformSummary, block: Option<TransformBlock>, } pub(crate) enum BlockType { Custom(BlockId), Header, Footer, } pub(crate) trait BlockLike { fn block_type(&self) -> BlockType; fn disposition(&self) -> BlockDisposition; } #[allow(clippy::large_enum_variant)] #[derive(Clone)] pub enum TransformBlock { Custom(Arc<Block>), ExcerptHeader { id: ExcerptId, buffer: BufferSnapshot, range: ExcerptRange<text::Anchor>, height: u8, starts_new_buffer: bool, show_excerpt_controls: bool, }, ExcerptFooter { id: ExcerptId, disposition: BlockDisposition, height: u8, }, } impl BlockLike for TransformBlock { fn block_type(&self) -> BlockType { match self { TransformBlock::Custom(block) => BlockType::Custom(block.id), TransformBlock::ExcerptHeader { .. } => BlockType::Header, TransformBlock::ExcerptFooter { .. } => BlockType::Footer, } } fn disposition(&self) -> BlockDisposition { self.disposition() } } impl TransformBlock { fn disposition(&self) -> BlockDisposition { match self { TransformBlock::Custom(block) => block.disposition, TransformBlock::ExcerptHeader { .. } => BlockDisposition::Above, TransformBlock::ExcerptFooter { disposition, .. } => *disposition, } } pub fn height(&self) -> u8 { match self { TransformBlock::Custom(block) => block.height, TransformBlock::ExcerptHeader { height, .. } => *height, TransformBlock::ExcerptFooter { height, .. } => *height, } } } impl Debug for TransformBlock { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { match self { Self::Custom(block) => f.debug_struct("Custom").field("block", block).finish(), Self::ExcerptHeader { buffer, starts_new_buffer, id, .. } => f .debug_struct("ExcerptHeader") .field("id", &id) .field("path", &buffer.file().map(|f| f.path())) .field("starts_new_buffer", &starts_new_buffer) .finish(), TransformBlock::ExcerptFooter { id, disposition, .. } => f .debug_struct("ExcerptFooter") .field("id", &id) .field("disposition", &disposition) .finish(), } } } #[derive(Clone, Debug, Default)] struct TransformSummary { input_rows: u32, output_rows: u32, } pub struct BlockChunks<'a> { transforms: sum_tree::Cursor<'a, Transform, (BlockRow, WrapRow)>, input_chunks: wrap_map::WrapChunks<'a>, input_chunk: Chunk<'a>, output_row: u32, max_output_row: u32, } #[derive(Clone)] pub struct BlockBufferRows<'a> { transforms: sum_tree::Cursor<'a, Transform, (BlockRow, WrapRow)>, input_buffer_rows: wrap_map::WrapBufferRows<'a>, output_row: BlockRow, started: bool, } impl BlockMap { pub fn new( wrap_snapshot: WrapSnapshot, show_excerpt_controls: bool, buffer_header_height: u8, excerpt_header_height: u8, excerpt_footer_height: u8, ) -> Self { let row_count = wrap_snapshot.max_point().row() + 1; let map = Self { next_block_id: AtomicUsize::new(0), blocks: Vec::new(), transforms: RefCell::new(SumTree::from_item(Transform::isomorphic(row_count), &())), wrap_snapshot: RefCell::new(wrap_snapshot.clone()), show_excerpt_controls, buffer_header_height, excerpt_header_height, excerpt_footer_height, }; map.sync( &wrap_snapshot, Patch::new(vec![Edit { old: 0..row_count, new: 0..row_count, }]), ); map } pub fn read(&self, wrap_snapshot: WrapSnapshot, edits: Patch<u32>) -> BlockMapReader { self.sync(&wrap_snapshot, edits); *self.wrap_snapshot.borrow_mut() = wrap_snapshot.clone(); BlockMapReader { blocks: &self.blocks, snapshot: BlockSnapshot { wrap_snapshot, transforms: self.transforms.borrow().clone(), }, } } pub fn write(&mut self, wrap_snapshot: WrapSnapshot, edits: Patch<u32>) -> BlockMapWriter { self.sync(&wrap_snapshot, edits); *self.wrap_snapshot.borrow_mut() = wrap_snapshot; BlockMapWriter(self) } fn sync(&self, wrap_snapshot: &WrapSnapshot, mut edits: Patch<u32>) { let buffer = wrap_snapshot.buffer_snapshot(); // Handle changing the last excerpt if it is empty. if buffer.trailing_excerpt_update_count() != self .wrap_snapshot .borrow() .buffer_snapshot() .trailing_excerpt_update_count() { let max_point = wrap_snapshot.max_point(); let edit_start = wrap_snapshot.prev_row_boundary(max_point); let edit_end = max_point.row() + 1; edits = edits.compose([WrapEdit { old: edit_start..edit_end, new: edit_start..edit_end, }]); } let edits = edits.into_inner(); if edits.is_empty() { return; } let mut transforms = self.transforms.borrow_mut(); let mut new_transforms = SumTree::new(); 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 last_block_ix = 0; let mut blocks_in_edit = Vec::new(); let mut edits = edits.into_iter().peekable(); while let Some(edit) = edits.next() { // Preserve any old transforms that precede this edit. let old_start = WrapRow(edit.old.start); let new_start = WrapRow(edit.new.start); new_transforms.append(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. let extent_before_edit = old_start.0 - cursor.start().0; push_isomorphic(&mut new_transforms, extent_before_edit); // Skip over any old transforms that intersect this edit. let mut old_end = WrapRow(edit.old.end); let mut new_end = WrapRow(edit.new.end); cursor.seek(&old_end, Bias::Left, &()); 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. while let Some(next_edit) = edits.peek() { if next_edit.old.start <= cursor.start().0 { old_end = WrapRow(next_edit.old.end); new_end = WrapRow(next_edit.new.end); cursor.seek(&old_end, Bias::Left, &()); 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(); } else { break; } } // Find the blocks within this edited region. let new_buffer_start = wrap_snapshot.to_point(WrapPoint::new(new_start.0, 0), Bias::Left); let start_bound = Bound::Included(new_buffer_start); let start_block_ix = match self.blocks[last_block_ix..].binary_search_by(|probe| { probe .position .to_point(buffer) .cmp(&new_buffer_start) .then(Ordering::Greater) }) { Ok(ix) | Err(ix) => last_block_ix + ix, }; let end_bound; let end_block_ix = if new_end.0 > wrap_snapshot.max_point().row() { end_bound = Bound::Unbounded; self.blocks.len() } else { let new_buffer_end = wrap_snapshot.to_point(WrapPoint::new(new_end.0, 0), Bias::Left); end_bound = Bound::Excluded(new_buffer_end); match self.blocks[start_block_ix..].binary_search_by(|probe| { probe .position .to_point(buffer) .cmp(&new_buffer_end) .then(Ordering::Greater) }) { Ok(ix) | Err(ix) => start_block_ix + ix, } }; last_block_ix = end_block_ix; debug_assert!(blocks_in_edit.is_empty()); blocks_in_edit.extend( self.blocks[start_block_ix..end_block_ix] .iter() .map(|block| { let mut position = block.position.to_point(buffer); match block.disposition { BlockDisposition::Above => position.column = 0, BlockDisposition::Below => { position.column = buffer.line_len(MultiBufferRow(position.row)) } } let position = wrap_snapshot.make_wrap_point(position, Bias::Left); (position.row(), TransformBlock::Custom(block.clone())) }), ); if buffer.show_headers() { blocks_in_edit.extend(BlockMap::header_blocks( self.show_excerpt_controls, self.excerpt_footer_height, self.buffer_header_height, self.excerpt_header_height, buffer, (start_bound, end_bound), wrap_snapshot, )); } BlockMap::sort_blocks(&mut blocks_in_edit); // For each of these blocks, insert a new isomorphic transform preceding the block, // and then insert the block itself. for (block_row, block) in blocks_in_edit.drain(..) { let insertion_row = match block.disposition() { BlockDisposition::Above => block_row, BlockDisposition::Below => block_row + 1, }; let extent_before_block = insertion_row - new_transforms.summary().input_rows; push_isomorphic(&mut new_transforms, extent_before_block); new_transforms.push(Transform::block(block), &()); } old_end = WrapRow(old_end.0.min(old_row_count)); new_end = WrapRow(new_end.0.min(new_row_count)); // Insert an isomorphic transform after the final block. let extent_after_last_block = new_end.0 - new_transforms.summary().input_rows; push_isomorphic(&mut new_transforms, extent_after_last_block); // Preserve any portion of the old transform after this edit. let extent_after_edit = cursor.start().0 - old_end.0; push_isomorphic(&mut new_transforms, extent_after_edit); } new_transforms.append(cursor.suffix(&()), &()); debug_assert_eq!( new_transforms.summary().input_rows, wrap_snapshot.max_point().row() + 1 ); drop(cursor); *transforms = new_transforms; } pub fn replace_renderers(&mut self, mut renderers: HashMap<BlockId, RenderBlock>) { for block in &mut self.blocks { if let Some(render) = renderers.remove(&block.id) { *block.render.lock() = render; } } } pub fn show_excerpt_controls(&self) -> bool { self.show_excerpt_controls } pub fn header_blocks<'a, 'b: 'a, 'c: 'a + 'b, R, T>( show_excerpt_controls: bool, excerpt_footer_height: u8, buffer_header_height: u8, excerpt_header_height: u8, buffer: &'b multi_buffer::MultiBufferSnapshot, range: R, wrap_snapshot: &'c WrapSnapshot, ) -> impl Iterator<Item = (u32, TransformBlock)> + 'b where R: RangeBounds<T>,