874 lines
29 KiB
Rust
874 lines
29 KiB
Rust
use super::{
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fold_map,
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tab_map::{
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self, Edit as InputEdit, OutputPoint as InputPoint, Snapshot as InputSnapshot, TextSummary,
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},
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};
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use crate::{
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editor::Point,
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settings::StyleId,
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sum_tree::{self, Cursor, SumTree},
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util::Bias,
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Settings,
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};
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use gpui::{AppContext, FontCache, FontSystem, Task};
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use parking_lot::Mutex;
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use postage::{
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prelude::{Sink, Stream},
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watch,
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};
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use smol::channel;
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use std::{collections::VecDeque, ops::Range, sync::Arc, time::Duration};
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#[derive(Copy, Clone, Debug, Default, Eq, Ord, PartialOrd, PartialEq)]
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pub struct OutputPoint(super::Point);
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impl OutputPoint {
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pub fn new(row: u32, column: u32) -> Self {
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Self(super::Point::new(row, column))
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}
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pub fn zero() -> Self {
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Self::new(0, 0)
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}
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pub fn row(self) -> u32 {
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self.0.row
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}
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pub fn column(self) -> u32 {
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self.0.column
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}
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pub fn row_mut(&mut self) -> &mut u32 {
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&mut self.0.row
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}
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pub fn column_mut(&mut self) -> &mut u32 {
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&mut self.0.column
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}
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}
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#[derive(Clone)]
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pub struct Snapshot {
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transforms: SumTree<Transform>,
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input: InputSnapshot,
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}
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impl Snapshot {
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fn new(input: InputSnapshot) -> Self {
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Self {
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transforms: SumTree::from_item(
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Transform {
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summary: TransformSummary {
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input: input.text_summary(),
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output: input.text_summary(),
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},
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display_text: None,
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},
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&(),
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),
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input,
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}
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}
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fn interpolate(&mut self, new_snapshot: InputSnapshot, edits: &[InputEdit]) {
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if edits.is_empty() {
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return;
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}
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let mut new_transforms;
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{
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let mut old_cursor = self.transforms.cursor::<InputPoint, ()>();
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let mut edits = edits.into_iter().peekable();
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new_transforms =
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old_cursor.slice(&edits.peek().unwrap().old_lines.start, Bias::Right, &());
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while let Some(edit) = edits.next() {
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if edit.new_lines.start > InputPoint::from(new_transforms.summary().input.lines) {
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let summary = new_snapshot.text_summary_for_range(
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InputPoint::from(new_transforms.summary().input.lines)
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..edit.new_lines.start,
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);
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new_transforms.push_or_extend(Transform::isomorphic(summary));
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}
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new_transforms.push_or_extend(Transform::isomorphic(
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new_snapshot.text_summary_for_range(edit.new_lines.clone()),
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));
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old_cursor.seek_forward(&edit.old_lines.end, Bias::Right, &());
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if let Some(next_edit) = edits.peek() {
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if next_edit.old_lines.start > old_cursor.seek_end(&()) {
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if old_cursor.seek_end(&()) > edit.old_lines.end {
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let summary = self.input.text_summary_for_range(
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edit.old_lines.end..old_cursor.seek_end(&()),
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);
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new_transforms.push_or_extend(Transform::isomorphic(summary));
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}
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old_cursor.next(&());
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new_transforms.push_tree(
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old_cursor.slice(&next_edit.old_lines.start, Bias::Right, &()),
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&(),
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);
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}
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} else {
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if old_cursor.seek_end(&()) > edit.old_lines.end {
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let summary = self
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.input
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.text_summary_for_range(edit.old_lines.end..old_cursor.seek_end(&()));
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new_transforms.push_or_extend(Transform::isomorphic(summary));
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}
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old_cursor.next(&());
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new_transforms.push_tree(old_cursor.suffix(&()), &());
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}
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}
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}
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self.transforms = new_transforms;
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self.input = new_snapshot;
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}
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pub fn chunks_at(&self, point: OutputPoint) -> Chunks {
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let mut transforms = self.transforms.cursor::<OutputPoint, InputPoint>();
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transforms.seek(&point, Bias::Right, &());
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let input_position =
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InputPoint(transforms.sum_start().0 + (point.0 - transforms.seek_start().0));
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let input_chunks = self.input.chunks_at(input_position);
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Chunks {
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input_chunks,
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transforms,
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input_position,
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input_chunk: "",
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}
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}
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pub fn highlighted_chunks_for_rows(&mut self, rows: Range<u32>) -> HighlightedChunks {
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let output_start = OutputPoint::new(rows.start, 0);
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let output_end = OutputPoint::new(rows.end, 0);
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let mut transforms = self.transforms.cursor::<OutputPoint, InputPoint>();
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transforms.seek(&output_start, Bias::Right, &());
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let input_start =
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InputPoint(transforms.sum_start().0 + (output_start.0 - transforms.seek_start().0));
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let input_end = self.to_input_point(output_end).min(self.input.max_point());
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HighlightedChunks {
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input_chunks: self.input.highlighted_chunks(input_start..input_end),
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input_position: input_start,
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style_id: StyleId::default(),
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input_chunk: "",
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transforms,
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}
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}
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pub fn max_point(&self) -> OutputPoint {
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self.to_output_point(self.input.max_point())
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}
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pub fn buffer_rows(&self, start_row: u32) -> BufferRows {
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let mut transforms = self.transforms.cursor::<OutputPoint, InputPoint>();
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transforms.seek(&OutputPoint::new(start_row, 0), Bias::Right, &());
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let input_row = transforms.sum_start().row();
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let mut input_buffer_rows = self.input.buffer_rows(start_row);
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let input_buffer_row = input_buffer_rows.next().unwrap();
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BufferRows {
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transforms,
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input_row,
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input_buffer_row,
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input_buffer_rows,
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}
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}
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pub fn to_input_point(&self, point: OutputPoint) -> InputPoint {
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let mut cursor = self.transforms.cursor::<OutputPoint, InputPoint>();
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cursor.seek(&point, Bias::Right, &());
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InputPoint(cursor.sum_start().0 + (point.0 - cursor.seek_start().0))
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}
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pub fn to_output_point(&self, point: InputPoint) -> OutputPoint {
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let mut cursor = self.transforms.cursor::<InputPoint, OutputPoint>();
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cursor.seek(&point, Bias::Right, &());
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OutputPoint(cursor.sum_start().0 + (point.0 - cursor.seek_start().0))
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}
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pub fn clip_point(&self, point: OutputPoint, bias: Bias) -> OutputPoint {
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self.to_output_point(self.input.clip_point(self.to_input_point(point), bias))
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}
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}
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pub struct Chunks<'a> {
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input_chunks: tab_map::Chunks<'a>,
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input_chunk: &'a str,
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input_position: InputPoint,
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transforms: Cursor<'a, Transform, OutputPoint, InputPoint>,
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}
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pub struct HighlightedChunks<'a> {
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input_chunks: tab_map::HighlightedChunks<'a>,
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input_chunk: &'a str,
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style_id: StyleId,
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input_position: InputPoint,
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transforms: Cursor<'a, Transform, OutputPoint, InputPoint>,
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}
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pub struct BufferRows<'a> {
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input_buffer_rows: fold_map::BufferRows<'a>,
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input_row: u32,
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input_buffer_row: u32,
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transforms: Cursor<'a, Transform, OutputPoint, InputPoint>,
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}
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impl<'a> Iterator for Chunks<'a> {
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type Item = &'a str;
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fn next(&mut self) -> Option<Self::Item> {
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let transform = self.transforms.item()?;
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if let Some(display_text) = transform.display_text {
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self.transforms.next(&());
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return Some(display_text);
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}
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if self.input_chunk.is_empty() {
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self.input_chunk = self.input_chunks.next().unwrap();
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}
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let mut input_len = 0;
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let transform_end = self.transforms.sum_end(&());
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for c in self.input_chunk.chars() {
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let char_len = c.len_utf8();
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input_len += char_len;
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if c == '\n' {
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*self.input_position.row_mut() += 1;
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*self.input_position.column_mut() = 0;
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} else {
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*self.input_position.column_mut() += char_len as u32;
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}
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if self.input_position >= transform_end {
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self.transforms.next(&());
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break;
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}
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}
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let (prefix, suffix) = self.input_chunk.split_at(input_len);
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self.input_chunk = suffix;
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Some(prefix)
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}
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}
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impl<'a> Iterator for HighlightedChunks<'a> {
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type Item = (&'a str, StyleId);
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fn next(&mut self) -> Option<Self::Item> {
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let transform = self.transforms.item()?;
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if let Some(display_text) = transform.display_text {
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self.transforms.next(&());
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return Some((display_text, self.style_id));
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}
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if self.input_chunk.is_empty() {
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let (chunk, style_id) = self.input_chunks.next().unwrap();
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self.input_chunk = chunk;
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self.style_id = style_id;
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}
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let mut input_len = 0;
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let transform_end = self.transforms.sum_end(&());
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for c in self.input_chunk.chars() {
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let char_len = c.len_utf8();
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input_len += char_len;
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if c == '\n' {
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*self.input_position.row_mut() += 1;
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*self.input_position.column_mut() = 0;
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} else {
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*self.input_position.column_mut() += char_len as u32;
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}
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if self.input_position >= transform_end {
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self.transforms.next(&());
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break;
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}
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}
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let (prefix, suffix) = self.input_chunk.split_at(input_len);
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self.input_chunk = suffix;
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Some((prefix, self.style_id))
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}
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}
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impl<'a> Iterator for BufferRows<'a> {
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type Item = u32;
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fn next(&mut self) -> Option<Self::Item> {
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let result = self.input_buffer_row;
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if self.input_row + 1 < self.transforms.sum_end(&()).row() {
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self.input_row += 1;
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self.input_buffer_row = self.input_buffer_rows.next().unwrap();
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} else {
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self.transforms.seek_forward(
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&OutputPoint::new(self.transforms.seek_start().row() + 1, 0),
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Bias::Right,
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&(),
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);
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}
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Some(result)
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}
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}
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struct State {
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snapshot: Snapshot,
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pending_edits: VecDeque<(InputSnapshot, Vec<InputEdit>)>,
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}
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pub struct WrapMap {
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state: Mutex<State>,
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background_changes_tx: channel::Sender<Change>,
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background_snapshot: watch::Receiver<Snapshot>,
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_background_task: Task<()>,
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}
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impl WrapMap {
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pub fn new(
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input: InputSnapshot,
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settings: Settings,
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wrap_width: Option<f32>,
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cx: &AppContext,
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) -> Self {
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let font_cache = cx.font_cache().clone();
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let font_system = cx.platform().fonts();
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let snapshot = Snapshot::new(input.clone());
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let (background_snapshot_tx, background_snapshot_rx) =
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watch::channel_with(snapshot.clone());
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let (edits_tx, edits_rx) = channel::unbounded();
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let background_task = {
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let snapshot = snapshot.clone();
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cx.background().spawn(async move {
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let mut wrapper =
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BackgroundWrapper::new(snapshot, settings, wrap_width, font_cache, font_system);
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wrapper.run(input, edits_rx, background_snapshot_tx).await;
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})
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};
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Self {
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state: Mutex::new(State {
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snapshot,
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pending_edits: VecDeque::new(),
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}),
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background_changes_tx: edits_tx,
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background_snapshot: background_snapshot_rx,
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_background_task: background_task,
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}
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}
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pub fn sync(&self, input: InputSnapshot, edits: Vec<InputEdit>, cx: &AppContext) -> Snapshot {
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let mut background_snapshot = self.background_snapshot.clone();
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let mut snapshot = background_snapshot.borrow().clone();
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log::info!("sync version: {:?}", snapshot.input.version());
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if !edits.is_empty() {
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self.background_changes_tx
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.try_send(Change::Input {
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snapshot: input.clone(),
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edits: edits.clone(),
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})
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.unwrap();
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cx.background().block_on(Duration::from_millis(5), async {
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loop {
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snapshot = background_snapshot.recv().await.unwrap();
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if snapshot.input.version() == input.version() {
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break;
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}
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}
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});
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}
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let mut state = &mut *self.state.lock();
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state.snapshot = snapshot;
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state.pending_edits.push_back((input, edits));
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while let Some((pending_input, _)) = state.pending_edits.front() {
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if pending_input.version() <= state.snapshot.input.version() {
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state.pending_edits.pop_front();
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} else {
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break;
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}
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}
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for (input, edits) in &state.pending_edits {
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state.snapshot.interpolate(input.clone(), &edits);
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}
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state.snapshot.clone()
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}
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pub fn set_wrap_width(&self, width: Option<f32>) {
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self.background_changes_tx
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.try_send(Change::Width(width))
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.unwrap();
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}
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pub fn notifications(&self) -> impl Stream<Item = ()> {
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self.background_snapshot.clone().map(|_| ())
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}
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}
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struct BackgroundWrapper {
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settings: Settings,
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wrap_width: Option<f32>,
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font_cache: Arc<FontCache>,
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font_system: Arc<dyn FontSystem>,
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snapshot: Snapshot,
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}
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enum Change {
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Input {
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snapshot: InputSnapshot,
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edits: Vec<tab_map::Edit>,
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},
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Width(Option<f32>),
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}
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impl BackgroundWrapper {
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fn new(
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snapshot: Snapshot,
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settings: Settings,
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wrap_width: Option<f32>,
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font_cache: Arc<FontCache>,
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font_system: Arc<dyn FontSystem>,
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) -> Self {
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Self {
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settings,
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wrap_width,
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font_cache,
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font_system,
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snapshot,
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}
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}
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async fn run(
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&mut self,
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input: InputSnapshot,
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edits_rx: channel::Receiver<Change>,
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mut snapshot_tx: watch::Sender<Snapshot>,
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) {
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let edit = InputEdit {
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old_lines: Default::default()..input.max_point(),
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new_lines: Default::default()..input.max_point(),
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};
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self.sync(input, vec![edit]);
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if snapshot_tx.send(self.snapshot.clone()).await.is_err() {
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return;
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}
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while let Ok(change) = edits_rx.recv().await {
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match change {
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Change::Input { snapshot, edits } => self.sync(snapshot, edits),
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Change::Width(wrap_width) => {
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if self.wrap_width == wrap_width {
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continue;
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} else {
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self.wrap_width = wrap_width;
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let input = self.snapshot.input.clone();
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let edit = InputEdit {
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old_lines: Default::default()..input.max_point(),
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new_lines: Default::default()..input.max_point(),
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};
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self.sync(input, vec![edit])
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}
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}
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};
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if snapshot_tx.send(self.snapshot.clone()).await.is_err() {
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break;
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}
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}
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}
|
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fn sync(&mut self, new_snapshot: InputSnapshot, edits: Vec<InputEdit>) {
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if edits.is_empty() {
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return;
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}
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let font_id = self
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.font_cache
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.select_font(self.settings.buffer_font_family, &Default::default())
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.unwrap();
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let font_size = self.settings.buffer_font_size;
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|
|
#[derive(Debug)]
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struct RowEdit {
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old_rows: Range<u32>,
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new_rows: Range<u32>,
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}
|
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let mut edits = edits.into_iter().peekable();
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let mut row_edits = Vec::new();
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while let Some(edit) = edits.next() {
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let mut row_edit = RowEdit {
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old_rows: edit.old_lines.start.row()..edit.old_lines.end.row() + 1,
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new_rows: edit.new_lines.start.row()..edit.new_lines.end.row() + 1,
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};
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while let Some(next_edit) = edits.peek() {
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if next_edit.old_lines.start.row() <= row_edit.old_rows.end {
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row_edit.old_rows.end = next_edit.old_lines.end.row() + 1;
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row_edit.new_rows.end = next_edit.new_lines.end.row() + 1;
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edits.next();
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} else {
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break;
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}
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}
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row_edits.push(row_edit);
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}
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let mut new_transforms;
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{
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let mut row_edits = row_edits.into_iter().peekable();
|
|
let mut old_cursor = self.snapshot.transforms.cursor::<InputPoint, ()>();
|
|
|
|
new_transforms = old_cursor.slice(
|
|
&InputPoint::new(row_edits.peek().unwrap().old_rows.start, 0),
|
|
Bias::Right,
|
|
&(),
|
|
);
|
|
|
|
while let Some(edit) = row_edits.next() {
|
|
if edit.new_rows.start > new_transforms.summary().input.lines.row {
|
|
let summary = new_snapshot.text_summary_for_range(
|
|
InputPoint::new(new_transforms.summary().input.lines.row, 0)
|
|
..InputPoint::new(edit.new_rows.start, 0),
|
|
);
|
|
new_transforms.push_or_extend(Transform::isomorphic(summary));
|
|
}
|
|
|
|
let mut input_row = edit.new_rows.start;
|
|
let mut line = String::new();
|
|
let mut remaining = None;
|
|
let mut chunks = new_snapshot.chunks_at(InputPoint::new(input_row, 0));
|
|
loop {
|
|
while let Some(chunk) = remaining.take().or_else(|| chunks.next()) {
|
|
if let Some(ix) = chunk.find('\n') {
|
|
line.push_str(&chunk[..ix + 1]);
|
|
remaining = Some(&chunk[ix + 1..]);
|
|
break;
|
|
} else {
|
|
line.push_str(chunk)
|
|
}
|
|
}
|
|
|
|
if line.is_empty() {
|
|
break;
|
|
}
|
|
|
|
let mut prev_boundary_ix = 0;
|
|
if let Some(wrap_width) = self.wrap_width {
|
|
for boundary_ix in self
|
|
.font_system
|
|
.wrap_line(&line, font_id, font_size, wrap_width)
|
|
{
|
|
let wrapped = &line[prev_boundary_ix..boundary_ix];
|
|
new_transforms
|
|
.push_or_extend(Transform::isomorphic(TextSummary::from(wrapped)));
|
|
new_transforms.push_or_extend(Transform::newline());
|
|
prev_boundary_ix = boundary_ix;
|
|
}
|
|
}
|
|
|
|
if prev_boundary_ix < line.len() {
|
|
new_transforms.push_or_extend(Transform::isomorphic(TextSummary::from(
|
|
&line[prev_boundary_ix..],
|
|
)));
|
|
}
|
|
|
|
line.clear();
|
|
input_row += 1;
|
|
if input_row == edit.new_rows.end {
|
|
break;
|
|
}
|
|
}
|
|
|
|
old_cursor.seek_forward(&InputPoint::new(edit.old_rows.end, 0), Bias::Right, &());
|
|
if let Some(next_edit) = row_edits.peek() {
|
|
if next_edit.old_rows.start > old_cursor.seek_end(&()).row() {
|
|
if old_cursor.seek_end(&()) > InputPoint::new(edit.old_rows.end, 0) {
|
|
let summary = self.snapshot.input.text_summary_for_range(
|
|
InputPoint::new(edit.old_rows.end, 0)..old_cursor.seek_end(&()),
|
|
);
|
|
new_transforms.push_or_extend(Transform::isomorphic(summary));
|
|
}
|
|
old_cursor.next(&());
|
|
new_transforms.push_tree(
|
|
old_cursor.slice(
|
|
&InputPoint::new(next_edit.old_rows.start, 0),
|
|
Bias::Right,
|
|
&(),
|
|
),
|
|
&(),
|
|
);
|
|
}
|
|
} else {
|
|
if old_cursor.seek_end(&()) > InputPoint::new(edit.old_rows.end, 0) {
|
|
let summary = self.snapshot.input.text_summary_for_range(
|
|
InputPoint::new(edit.old_rows.end, 0)..old_cursor.seek_end(&()),
|
|
);
|
|
new_transforms.push_or_extend(Transform::isomorphic(summary));
|
|
}
|
|
old_cursor.next(&());
|
|
new_transforms.push_tree(old_cursor.suffix(&()), &());
|
|
}
|
|
}
|
|
}
|
|
|
|
self.snapshot = Snapshot {
|
|
transforms: new_transforms,
|
|
input: new_snapshot,
|
|
};
|
|
}
|
|
}
|
|
|
|
#[derive(Clone, Debug, Default, Eq, PartialEq)]
|
|
struct Transform {
|
|
summary: TransformSummary,
|
|
display_text: Option<&'static str>,
|
|
}
|
|
|
|
impl Transform {
|
|
fn isomorphic(summary: TextSummary) -> Self {
|
|
Self {
|
|
summary: TransformSummary {
|
|
input: summary.clone(),
|
|
output: summary,
|
|
},
|
|
display_text: None,
|
|
}
|
|
}
|
|
|
|
fn newline() -> Self {
|
|
Self {
|
|
summary: TransformSummary {
|
|
input: TextSummary::default(),
|
|
output: TextSummary {
|
|
lines: Point::new(1, 0),
|
|
first_line_chars: 0,
|
|
last_line_chars: 0,
|
|
longest_row: 0,
|
|
longest_row_chars: 0,
|
|
},
|
|
},
|
|
display_text: Some("\n"),
|
|
}
|
|
}
|
|
|
|
fn is_isomorphic(&self) -> bool {
|
|
self.display_text.is_none()
|
|
}
|
|
}
|
|
|
|
impl sum_tree::Item for Transform {
|
|
type Summary = TransformSummary;
|
|
|
|
fn summary(&self) -> Self::Summary {
|
|
self.summary.clone()
|
|
}
|
|
}
|
|
|
|
impl SumTree<Transform> {
|
|
pub fn push_or_extend(&mut self, transform: Transform) {
|
|
let mut transform = Some(transform);
|
|
self.update_last(
|
|
|last_transform| {
|
|
if last_transform.is_isomorphic() && transform.as_ref().unwrap().is_isomorphic() {
|
|
let transform = transform.take().unwrap();
|
|
last_transform.summary.input += &transform.summary.input;
|
|
last_transform.summary.output += &transform.summary.output;
|
|
}
|
|
},
|
|
&(),
|
|
);
|
|
|
|
if let Some(transform) = transform {
|
|
self.push(transform, &());
|
|
}
|
|
}
|
|
}
|
|
|
|
#[derive(Clone, Debug, Default, Eq, PartialEq)]
|
|
struct TransformSummary {
|
|
input: TextSummary,
|
|
output: TextSummary,
|
|
}
|
|
|
|
impl sum_tree::Summary for TransformSummary {
|
|
type Context = ();
|
|
|
|
fn add_summary(&mut self, other: &Self, _: &()) {
|
|
self.input += &other.input;
|
|
self.output += &other.output;
|
|
}
|
|
}
|
|
|
|
impl<'a> sum_tree::Dimension<'a, TransformSummary> for InputPoint {
|
|
fn add_summary(&mut self, summary: &'a TransformSummary, _: &()) {
|
|
self.0 += summary.input.lines;
|
|
}
|
|
}
|
|
|
|
impl<'a> sum_tree::Dimension<'a, TransformSummary> for OutputPoint {
|
|
fn add_summary(&mut self, summary: &'a TransformSummary, _: &()) {
|
|
self.0 += summary.output.lines;
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
use crate::{
|
|
editor::{
|
|
display_map::{fold_map::FoldMap, tab_map::TabMap},
|
|
Buffer,
|
|
},
|
|
util::RandomCharIter,
|
|
};
|
|
use gpui::fonts::FontId;
|
|
use rand::prelude::*;
|
|
use std::env;
|
|
|
|
#[gpui::test]
|
|
fn test_random_wraps(cx: &mut gpui::MutableAppContext) {
|
|
let iterations = env::var("ITERATIONS")
|
|
.map(|i| i.parse().expect("invalid `ITERATIONS` variable"))
|
|
.unwrap_or(100);
|
|
let operations = env::var("OPERATIONS")
|
|
.map(|i| i.parse().expect("invalid `OPERATIONS` variable"))
|
|
.unwrap_or(10);
|
|
let seed_range = if let Ok(seed) = env::var("SEED") {
|
|
let seed = seed.parse().expect("invalid `SEED` variable");
|
|
seed..seed + 1
|
|
} else {
|
|
0..iterations
|
|
};
|
|
|
|
for seed in seed_range {
|
|
dbg!(seed);
|
|
let mut rng = StdRng::seed_from_u64(seed);
|
|
|
|
let buffer = cx.add_model(|cx| {
|
|
let len = rng.gen_range(0..10);
|
|
let text = RandomCharIter::new(&mut rng).take(len).collect::<String>();
|
|
log::info!("Initial buffer text: {:?}", text);
|
|
Buffer::new(0, text, cx)
|
|
});
|
|
let (fold_map, folds_snapshot) = FoldMap::new(buffer.clone(), cx.as_ref());
|
|
let (tab_map, tabs_snapshot) =
|
|
TabMap::new(folds_snapshot.clone(), rng.gen_range(1..=4));
|
|
let font_cache = cx.font_cache().clone();
|
|
let font_system = cx.platform().fonts();
|
|
let wrap_width = rng.gen_range(100.0..=1000.0);
|
|
let settings = Settings {
|
|
tab_size: 4,
|
|
buffer_font_family: font_cache.load_family(&["Helvetica"]).unwrap(),
|
|
buffer_font_size: 14.0,
|
|
..Settings::new(&font_cache).unwrap()
|
|
};
|
|
let font_id = font_cache
|
|
.select_font(settings.buffer_font_family, &Default::default())
|
|
.unwrap();
|
|
let mut wrapper = BackgroundWrapper::new(
|
|
Snapshot::new(tabs_snapshot.clone()),
|
|
settings.clone(),
|
|
Some(wrap_width),
|
|
font_cache.clone(),
|
|
font_system.clone(),
|
|
);
|
|
let edit = InputEdit {
|
|
old_lines: Default::default()..tabs_snapshot.max_point(),
|
|
new_lines: Default::default()..tabs_snapshot.max_point(),
|
|
};
|
|
wrapper.sync(tabs_snapshot.clone(), vec![edit]);
|
|
|
|
let unwrapped_text = tabs_snapshot.text();
|
|
let expected_text =
|
|
wrap_text(&unwrapped_text, wrap_width, font_id, font_system.as_ref());
|
|
|
|
let actual_text = wrapper
|
|
.snapshot
|
|
.chunks_at(OutputPoint::zero())
|
|
.collect::<String>();
|
|
|
|
assert_eq!(
|
|
actual_text, expected_text,
|
|
"unwrapped text is: {:?}",
|
|
unwrapped_text
|
|
);
|
|
|
|
let mut interpolated_snapshot = wrapper.snapshot.clone();
|
|
for _i in 0..operations {
|
|
buffer.update(cx, |buffer, cx| buffer.randomly_mutate(&mut rng, cx));
|
|
let (snapshot, edits) = fold_map.read(cx.as_ref());
|
|
let (snapshot, edits) = tab_map.sync(snapshot, edits);
|
|
interpolated_snapshot.interpolate(snapshot.clone(), &edits);
|
|
interpolated_snapshot.check_invariants();
|
|
|
|
let unwrapped_text = snapshot.text();
|
|
let expected_text =
|
|
wrap_text(&unwrapped_text, wrap_width, font_id, font_system.as_ref());
|
|
wrapper.sync(snapshot, edits);
|
|
wrapper.snapshot.check_invariants();
|
|
let actual_text = wrapper
|
|
.snapshot
|
|
.chunks_at(OutputPoint::zero())
|
|
.collect::<String>();
|
|
assert_eq!(
|
|
actual_text, expected_text,
|
|
"unwrapped text is: {:?}",
|
|
unwrapped_text
|
|
);
|
|
|
|
interpolated_snapshot = wrapper.snapshot.clone();
|
|
}
|
|
}
|
|
}
|
|
|
|
fn wrap_text(
|
|
unwrapped_text: &str,
|
|
wrap_width: f32,
|
|
font_id: FontId,
|
|
font_system: &dyn FontSystem,
|
|
) -> String {
|
|
let mut wrapped_text = String::new();
|
|
for (row, line) in unwrapped_text.split('\n').enumerate() {
|
|
if row > 0 {
|
|
wrapped_text.push('\n')
|
|
}
|
|
|
|
let mut prev_ix = 0;
|
|
for ix in font_system.wrap_line(line, font_id, 14.0, wrap_width) {
|
|
wrapped_text.push_str(&line[prev_ix..ix]);
|
|
wrapped_text.push('\n');
|
|
prev_ix = ix;
|
|
}
|
|
wrapped_text.push_str(&line[prev_ix..]);
|
|
}
|
|
wrapped_text
|
|
}
|
|
|
|
impl Snapshot {
|
|
fn check_invariants(&self) {
|
|
assert_eq!(
|
|
InputPoint::from(self.transforms.summary().input.lines),
|
|
self.input.max_point()
|
|
);
|
|
|
|
let mut transforms = self.transforms.cursor::<(), ()>().peekable();
|
|
while let Some(transform) = transforms.next() {
|
|
let next_transform = transforms.peek();
|
|
assert!(
|
|
!transform.is_isomorphic()
|
|
|| next_transform.map_or(true, |t| !t.is_isomorphic())
|
|
);
|
|
}
|
|
}
|
|
}
|
|
}
|