592 lines
19 KiB
Rust
592 lines
19 KiB
Rust
mod fold_map;
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mod tab_map;
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mod wrap_map;
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use super::{buffer, Anchor, Bias, Buffer, Point, Settings, ToOffset, ToPoint};
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use fold_map::FoldMap;
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pub use fold_map::InputRows;
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use gpui::{AppContext, ModelHandle};
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use std::ops::Range;
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use tab_map::TabMap;
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use wrap_map::WrapMap;
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pub struct DisplayMap {
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buffer: ModelHandle<Buffer>,
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fold_map: FoldMap,
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tab_map: TabMap,
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wrap_map: WrapMap,
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}
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impl DisplayMap {
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pub fn new(
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buffer: ModelHandle<Buffer>,
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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 (fold_map, snapshot) = FoldMap::new(buffer.clone(), cx);
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let (tab_map, snapshot) = TabMap::new(snapshot, settings.tab_size);
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let wrap_map = WrapMap::new(snapshot, settings, wrap_width, cx);
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DisplayMap {
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buffer,
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fold_map,
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tab_map,
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wrap_map,
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}
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}
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pub fn snapshot(&self, cx: &AppContext) -> DisplayMapSnapshot {
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let (folds_snapshot, edits) = self.fold_map.read(cx);
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let (tabs_snapshot, edits) = self.tab_map.sync(folds_snapshot.clone(), edits);
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let wraps_snapshot = self.wrap_map.sync(tabs_snapshot.clone(), edits, cx);
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DisplayMapSnapshot {
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buffer_snapshot: self.buffer.read(cx).snapshot(),
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folds_snapshot,
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tabs_snapshot,
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wraps_snapshot,
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}
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}
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pub fn fold<T: ToOffset>(
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&mut self,
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ranges: impl IntoIterator<Item = Range<T>>,
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cx: &AppContext,
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) {
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let (mut fold_map, snapshot, edits) = self.fold_map.write(cx);
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let (snapshot, edits) = self.tab_map.sync(snapshot, edits);
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self.wrap_map.sync(snapshot, edits, cx);
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let (snapshot, edits) = fold_map.fold(ranges, cx);
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let (snapshot, edits) = self.tab_map.sync(snapshot, edits);
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self.wrap_map.sync(snapshot, edits, cx);
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}
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pub fn unfold<T: ToOffset>(
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&mut self,
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ranges: impl IntoIterator<Item = Range<T>>,
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cx: &AppContext,
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) {
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let (mut fold_map, snapshot, edits) = self.fold_map.write(cx);
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let (snapshot, edits) = self.tab_map.sync(snapshot, edits);
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self.wrap_map.sync(snapshot, edits, cx);
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let (snapshot, edits) = fold_map.unfold(ranges, cx);
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let (snapshot, edits) = self.tab_map.sync(snapshot, edits);
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self.wrap_map.sync(snapshot, edits, cx);
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}
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pub fn set_wrap_width(&self, width: Option<f32>) {
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self.wrap_map.set_wrap_width(width);
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}
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}
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pub struct DisplayMapSnapshot {
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buffer_snapshot: buffer::Snapshot,
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folds_snapshot: fold_map::Snapshot,
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tabs_snapshot: tab_map::Snapshot,
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wraps_snapshot: wrap_map::Snapshot,
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}
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impl DisplayMapSnapshot {
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pub fn buffer_rows(&self, start_row: u32) -> InputRows {
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self.folds_snapshot.input_rows(start_row)
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}
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pub fn max_point(&self) -> DisplayPoint {
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DisplayPoint(self.wraps_snapshot.max_point())
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}
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pub fn chunks_at(&self, point: DisplayPoint) -> wrap_map::Chunks {
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self.wraps_snapshot.chunks_at(point.0)
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}
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pub fn highlighted_chunks_for_rows(&mut self, rows: Range<u32>) -> tab_map::HighlightedChunks {
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self.tabs_snapshot.highlighted_chunks_for_rows(rows)
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}
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pub fn chars_at<'a>(&'a self, point: DisplayPoint) -> impl Iterator<Item = char> + 'a {
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self.chunks_at(point).flat_map(str::chars)
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}
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pub fn column_to_chars(&self, display_row: u32, target: u32) -> u32 {
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let mut count = 0;
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let mut column = 0;
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for c in self.chars_at(DisplayPoint::new(display_row, 0)) {
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if column >= target {
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break;
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}
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count += 1;
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column += c.len_utf8() as u32;
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}
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count
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}
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pub fn column_from_chars(&self, display_row: u32, char_count: u32) -> u32 {
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let mut count = 0;
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let mut column = 0;
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for c in self.chars_at(DisplayPoint::new(display_row, 0)) {
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if c == '\n' || count >= char_count {
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break;
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}
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count += 1;
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column += c.len_utf8() as u32;
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}
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column
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}
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pub fn clip_point(&self, point: DisplayPoint, bias: Bias) -> DisplayPoint {
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DisplayPoint(self.wraps_snapshot.clip_point(point.0, bias))
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}
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pub fn folds_in_range<'a, T>(
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&'a self,
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range: Range<T>,
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) -> impl Iterator<Item = &'a Range<Anchor>>
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where
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T: ToOffset,
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{
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self.folds_snapshot.folds_in_range(range)
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}
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pub fn intersects_fold<T: ToOffset>(&self, offset: T) -> bool {
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self.folds_snapshot.intersects_fold(offset)
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}
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pub fn is_line_folded(&self, display_row: u32) -> bool {
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self.folds_snapshot.is_line_folded(display_row)
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}
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pub fn text(&self) -> String {
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self.chunks_at(DisplayPoint::zero()).collect()
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}
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pub fn line(&self, display_row: u32) -> String {
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let mut result = String::new();
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for chunk in self.chunks_at(DisplayPoint::new(display_row, 0)) {
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if let Some(ix) = chunk.find('\n') {
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result.push_str(&chunk[0..ix]);
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break;
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} else {
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result.push_str(chunk);
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}
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}
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result
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}
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pub fn line_indent(&self, display_row: u32) -> (u32, bool) {
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let mut indent = 0;
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let mut is_blank = true;
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for c in self.chars_at(DisplayPoint::new(display_row, 0)) {
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if c == ' ' {
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indent += 1;
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} else {
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is_blank = c == '\n';
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break;
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}
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}
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(indent, is_blank)
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}
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pub fn line_len(&self, row: u32) -> u32 {
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self.tabs_snapshot.line_len(row)
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}
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pub fn longest_row(&self) -> u32 {
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self.tabs_snapshot.longest_row()
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}
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pub fn anchor_before(&self, point: DisplayPoint, bias: Bias) -> Anchor {
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self.buffer_snapshot
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.anchor_before(point.to_buffer_point(self, bias))
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}
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pub fn anchor_after(&self, point: DisplayPoint, bias: Bias) -> Anchor {
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self.buffer_snapshot
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.anchor_after(point.to_buffer_point(self, bias))
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}
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}
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#[derive(Copy, Clone, Debug, Default, Eq, Ord, PartialOrd, PartialEq)]
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pub struct DisplayPoint(wrap_map::OutputPoint);
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impl DisplayPoint {
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pub fn new(row: u32, column: u32) -> Self {
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Self(wrap_map::OutputPoint::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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self.0.row_mut()
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}
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pub fn column_mut(&mut self) -> &mut u32 {
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self.0.column_mut()
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}
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pub fn to_buffer_point(self, map: &DisplayMapSnapshot, bias: Bias) -> Point {
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let unwrapped_point = map.wraps_snapshot.to_input_point(self.0);
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let unexpanded_point = map.tabs_snapshot.to_input_point(unwrapped_point, bias).0;
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map.folds_snapshot.to_input_point(unexpanded_point)
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}
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pub fn to_buffer_offset(self, map: &DisplayMapSnapshot, bias: Bias) -> usize {
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let unwrapped_point = map.wraps_snapshot.to_input_point(self.0);
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let unexpanded_point = map.tabs_snapshot.to_input_point(unwrapped_point, bias).0;
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map.folds_snapshot.to_input_offset(unexpanded_point)
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}
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}
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impl Point {
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pub fn to_display_point(self, map: &DisplayMapSnapshot) -> DisplayPoint {
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let folded_point = map.folds_snapshot.to_output_point(self);
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let expanded_point = map.tabs_snapshot.to_output_point(folded_point);
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let wrapped_point = map.wraps_snapshot.to_output_point(expanded_point);
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DisplayPoint(wrapped_point)
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}
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}
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impl Anchor {
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pub fn to_display_point(&self, map: &DisplayMapSnapshot) -> DisplayPoint {
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self.to_point(&map.buffer_snapshot).to_display_point(map)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::{
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language::{Language, LanguageConfig},
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settings::Theme,
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test::*,
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};
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use buffer::History;
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use std::sync::Arc;
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#[gpui::test]
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async fn test_soft_wraps(mut cx: gpui::TestAppContext) {
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cx.foreground().set_block_on_ticks(usize::MAX..=usize::MAX);
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let font_cache = cx.font_cache();
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let settings = Settings {
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buffer_font_family: font_cache.load_family(&["Helvetica"]).unwrap(),
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ui_font_family: font_cache.load_family(&["Helvetica"]).unwrap(),
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buffer_font_size: 12.0,
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ui_font_size: 12.0,
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tab_size: 4,
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theme: Arc::new(Theme::default()),
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};
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let wrap_width = Some(64.);
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let text = "one two three four five\nsix seven eight";
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let buffer = cx.add_model(|cx| Buffer::new(0, text.to_string(), cx));
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let map = cx.read(|cx| DisplayMap::new(buffer.clone(), settings, wrap_width, cx));
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let snapshot = cx.read(|cx| map.snapshot(cx));
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assert_eq!(
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snapshot
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.chunks_at(DisplayPoint::new(0, 3))
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.collect::<String>(),
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" two \nthree four \nfive\nsix seven \neight"
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);
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buffer.update(&mut cx, |buffer, cx| {
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let ix = buffer.text().find("seven").unwrap();
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buffer.edit(vec![ix..ix], "and ", cx);
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});
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let snapshot = cx.read(|cx| map.snapshot(cx));
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assert_eq!(
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snapshot
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.chunks_at(DisplayPoint::new(1, 0))
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.collect::<String>(),
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"three four \nfive\nsix and \nseven eight"
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);
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}
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#[gpui::test]
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fn test_chunks_at(cx: &mut gpui::MutableAppContext) {
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let text = sample_text(6, 6);
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let buffer = cx.add_model(|cx| Buffer::new(0, text, cx));
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let map = DisplayMap::new(
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buffer.clone(),
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Settings::new(cx.font_cache()).unwrap().with_tab_size(4),
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None,
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cx.as_ref(),
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);
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buffer.update(cx, |buffer, cx| {
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buffer.edit(
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vec![
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Point::new(1, 0)..Point::new(1, 0),
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Point::new(1, 1)..Point::new(1, 1),
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Point::new(2, 1)..Point::new(2, 1),
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],
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"\t",
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cx,
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)
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});
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assert_eq!(
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&map.snapshot(cx.as_ref())
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.chunks_at(DisplayPoint::new(1, 0))
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.collect::<String>()[0..10],
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" b bb"
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);
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assert_eq!(
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&map.snapshot(cx.as_ref())
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.chunks_at(DisplayPoint::new(1, 2))
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.collect::<String>()[0..10],
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" b bbbb"
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);
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assert_eq!(
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&map.snapshot(cx.as_ref())
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.chunks_at(DisplayPoint::new(1, 6))
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.collect::<String>()[0..13],
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" bbbbb\nc c"
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);
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}
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#[gpui::test]
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async fn test_highlighted_chunks_at(mut cx: gpui::TestAppContext) {
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use unindent::Unindent as _;
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let grammar = tree_sitter_rust::language();
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let text = r#"
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fn outer() {}
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mod module {
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fn inner() {}
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}"#
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.unindent();
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let highlight_query = tree_sitter::Query::new(
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grammar,
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r#"
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(mod_item name: (identifier) body: _ @mod.body)
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(function_item name: (identifier) @fn.name)"#,
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)
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.unwrap();
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let theme = Theme::parse(
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r#"
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[syntax]
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"mod.body" = 0xff0000
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"fn.name" = 0x00ff00"#,
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)
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.unwrap();
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let lang = Arc::new(Language {
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config: LanguageConfig {
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name: "Test".to_string(),
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path_suffixes: vec![".test".to_string()],
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..Default::default()
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},
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grammar: grammar.clone(),
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highlight_query,
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brackets_query: tree_sitter::Query::new(grammar, "").unwrap(),
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theme_mapping: Default::default(),
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});
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lang.set_theme(&theme);
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let buffer = cx.add_model(|cx| {
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Buffer::from_history(0, History::new(text.into()), None, Some(lang), cx)
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});
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buffer.condition(&cx, |buf, _| !buf.is_parsing()).await;
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let mut map = cx.read(|cx| {
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DisplayMap::new(
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buffer,
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Settings::new(cx.font_cache()).unwrap().with_tab_size(2),
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None,
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cx,
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)
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});
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assert_eq!(
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cx.read(|cx| highlighted_chunks(0..5, &map, &theme, cx)),
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vec![
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("fn ".to_string(), None),
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("outer".to_string(), Some("fn.name")),
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("() {}\n\nmod module ".to_string(), None),
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("{\n fn ".to_string(), Some("mod.body")),
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("inner".to_string(), Some("fn.name")),
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("() {}\n}".to_string(), Some("mod.body")),
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]
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);
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assert_eq!(
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cx.read(|cx| highlighted_chunks(3..5, &map, &theme, cx)),
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vec![
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(" fn ".to_string(), Some("mod.body")),
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("inner".to_string(), Some("fn.name")),
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("() {}\n}".to_string(), Some("mod.body")),
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]
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);
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cx.read(|cx| map.fold(vec![Point::new(0, 6)..Point::new(3, 2)], cx));
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assert_eq!(
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cx.read(|cx| highlighted_chunks(0..2, &map, &theme, cx)),
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vec![
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("fn ".to_string(), None),
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("out".to_string(), Some("fn.name")),
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("…".to_string(), None),
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(" fn ".to_string(), Some("mod.body")),
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("inner".to_string(), Some("fn.name")),
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("() {}\n}".to_string(), Some("mod.body")),
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]
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);
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fn highlighted_chunks<'a>(
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rows: Range<u32>,
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map: &DisplayMap,
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theme: &'a Theme,
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cx: &AppContext,
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) -> Vec<(String, Option<&'a str>)> {
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let mut chunks: Vec<(String, Option<&str>)> = Vec::new();
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for (chunk, style_id) in map.snapshot(cx).highlighted_chunks_for_rows(rows) {
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let style_name = theme.syntax_style_name(style_id);
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if let Some((last_chunk, last_style_name)) = chunks.last_mut() {
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if style_name == *last_style_name {
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last_chunk.push_str(chunk);
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} else {
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chunks.push((chunk.to_string(), style_name));
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}
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} else {
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chunks.push((chunk.to_string(), style_name));
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}
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}
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chunks
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}
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}
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#[gpui::test]
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fn test_clip_point(cx: &mut gpui::MutableAppContext) {
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use Bias::{Left, Right};
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let text = "\n'a', 'α',\t'✋',\t'❎', '🍐'\n";
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let display_text = "\n'a', 'α', '✋', '❎', '🍐'\n";
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let buffer = cx.add_model(|cx| Buffer::new(0, text, cx));
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let cx = cx.as_ref();
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let map = DisplayMap::new(
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buffer.clone(),
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Settings::new(cx.font_cache()).unwrap().with_tab_size(4),
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None,
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cx,
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);
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let map = map.snapshot(cx);
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assert_eq!(map.text(), display_text);
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for (input_column, bias, output_column) in vec![
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("'a', '".len(), Left, "'a', '".len()),
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("'a', '".len() + 1, Left, "'a', '".len()),
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("'a', '".len() + 1, Right, "'a', 'α".len()),
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("'a', 'α', ".len(), Left, "'a', 'α',".len()),
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("'a', 'α', ".len(), Right, "'a', 'α', ".len()),
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("'a', 'α', '".len() + 1, Left, "'a', 'α', '".len()),
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("'a', 'α', '".len() + 1, Right, "'a', 'α', '✋".len()),
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("'a', 'α', '✋',".len(), Right, "'a', 'α', '✋',".len()),
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("'a', 'α', '✋', ".len(), Left, "'a', 'α', '✋',".len()),
|
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(
|
||
"'a', 'α', '✋', ".len(),
|
||
Right,
|
||
"'a', 'α', '✋', ".len(),
|
||
),
|
||
] {
|
||
assert_eq!(
|
||
map.clip_point(DisplayPoint::new(1, input_column as u32), bias),
|
||
DisplayPoint::new(1, output_column as u32),
|
||
"clip_point(({}, {}))",
|
||
1,
|
||
input_column,
|
||
);
|
||
}
|
||
}
|
||
|
||
#[gpui::test]
|
||
fn test_tabs_with_multibyte_chars(cx: &mut gpui::MutableAppContext) {
|
||
let text = "✅\t\tα\nβ\t\n🏀β\t\tγ";
|
||
let buffer = cx.add_model(|cx| Buffer::new(0, text, cx));
|
||
let cx = cx.as_ref();
|
||
let map = DisplayMap::new(
|
||
buffer.clone(),
|
||
Settings::new(cx.font_cache()).unwrap().with_tab_size(4),
|
||
None,
|
||
cx,
|
||
);
|
||
let map = map.snapshot(cx);
|
||
assert_eq!(map.text(), "✅ α\nβ \n🏀β γ");
|
||
|
||
let point = Point::new(0, "✅\t\t".len() as u32);
|
||
let display_point = DisplayPoint::new(0, "✅ ".len() as u32);
|
||
assert_eq!(point.to_display_point(&map), display_point);
|
||
assert_eq!(display_point.to_buffer_point(&map, Bias::Left), point,);
|
||
|
||
let point = Point::new(1, "β\t".len() as u32);
|
||
let display_point = DisplayPoint::new(1, "β ".len() as u32);
|
||
assert_eq!(point.to_display_point(&map), display_point);
|
||
assert_eq!(display_point.to_buffer_point(&map, Bias::Left), point,);
|
||
|
||
let point = Point::new(2, "🏀β\t\t".len() as u32);
|
||
let display_point = DisplayPoint::new(2, "🏀β ".len() as u32);
|
||
assert_eq!(point.to_display_point(&map), display_point);
|
||
assert_eq!(display_point.to_buffer_point(&map, Bias::Left), point,);
|
||
|
||
// Display points inside of expanded tabs
|
||
assert_eq!(
|
||
DisplayPoint::new(0, "✅ ".len() as u32).to_buffer_point(&map, Bias::Right),
|
||
Point::new(0, "✅\t\t".len() as u32),
|
||
);
|
||
assert_eq!(
|
||
DisplayPoint::new(0, "✅ ".len() as u32).to_buffer_point(&map, Bias::Left),
|
||
Point::new(0, "✅\t".len() as u32),
|
||
);
|
||
assert_eq!(
|
||
map.chunks_at(DisplayPoint::new(0, "✅ ".len() as u32))
|
||
.collect::<String>(),
|
||
" α\nβ \n🏀β γ"
|
||
);
|
||
assert_eq!(
|
||
DisplayPoint::new(0, "✅ ".len() as u32).to_buffer_point(&map, Bias::Right),
|
||
Point::new(0, "✅\t".len() as u32),
|
||
);
|
||
assert_eq!(
|
||
DisplayPoint::new(0, "✅ ".len() as u32).to_buffer_point(&map, Bias::Left),
|
||
Point::new(0, "✅".len() as u32),
|
||
);
|
||
assert_eq!(
|
||
map.chunks_at(DisplayPoint::new(0, "✅ ".len() as u32))
|
||
.collect::<String>(),
|
||
" α\nβ \n🏀β γ"
|
||
);
|
||
|
||
// Clipping display points inside of multi-byte characters
|
||
assert_eq!(
|
||
map.clip_point(DisplayPoint::new(0, "✅".len() as u32 - 1), Bias::Left),
|
||
DisplayPoint::new(0, 0)
|
||
);
|
||
assert_eq!(
|
||
map.clip_point(DisplayPoint::new(0, "✅".len() as u32 - 1), Bias::Right),
|
||
DisplayPoint::new(0, "✅".len() as u32)
|
||
);
|
||
}
|
||
|
||
#[gpui::test]
|
||
fn test_max_point(cx: &mut gpui::MutableAppContext) {
|
||
let buffer = cx.add_model(|cx| Buffer::new(0, "aaa\n\t\tbbb", cx));
|
||
let map = DisplayMap::new(
|
||
buffer.clone(),
|
||
Settings::new(cx.font_cache()).unwrap().with_tab_size(4),
|
||
None,
|
||
cx.as_ref(),
|
||
);
|
||
assert_eq!(
|
||
map.snapshot(cx.as_ref()).max_point(),
|
||
DisplayPoint::new(1, 11)
|
||
)
|
||
}
|
||
}
|