diff options
Diffstat (limited to 'helix-core/src/syntax.rs')
| -rw-r--r-- | helix-core/src/syntax.rs | 419 |
1 files changed, 346 insertions, 73 deletions
diff --git a/helix-core/src/syntax.rs b/helix-core/src/syntax.rs index 78abc0b0..7de29e2b 100644 --- a/helix-core/src/syntax.rs +++ b/helix-core/src/syntax.rs @@ -169,6 +169,9 @@ pub struct LanguageConfiguration { pub workspace_lsp_roots: Option<Vec<PathBuf>>, #[serde(default)] pub persistent_diagnostic_sources: Vec<String>, + + /// If set, overrides rainbow brackets for a language. + pub rainbow_brackets: Option<bool>, } #[derive(Debug, PartialEq, Eq, Hash)] @@ -740,6 +743,7 @@ impl LanguageConfiguration { // always highlight syntax errors // highlights_query += "\n(ERROR) @error"; + let rainbows_query = read_query(&self.language_id, "rainbows.scm"); let injections_query = read_query(&self.language_id, "injections.scm"); let locals_query = read_query(&self.language_id, "locals.scm"); @@ -758,6 +762,7 @@ impl LanguageConfiguration { let config = HighlightConfiguration::new( language, &highlights_query, + &rainbows_query, &injections_query, &locals_query, ) @@ -1066,6 +1071,39 @@ thread_local! { }) } +/// Creates an iterator over the captures in a query within the given range, +/// re-using a cursor from the pool if available. +/// SAFETY: The `QueryCaptures` must be droped before the `QueryCursor` is dropped. +unsafe fn query_captures<'a, 'tree>( + query: &'a Query, + root: Node<'tree>, + source: RopeSlice<'a>, + range: Option<std::ops::Range<usize>>, +) -> ( + QueryCursor, + QueryCaptures<'a, 'tree, RopeProvider<'a>, &'a [u8]>, +) { + // Reuse a cursor from the pool if available. + let mut cursor = PARSER.with(|ts_parser| { + let highlighter = &mut ts_parser.borrow_mut(); + highlighter.cursors.pop().unwrap_or_else(QueryCursor::new) + }); + + // This is the unsafe line: + // The `captures` iterator borrows the `Tree` and the `QueryCursor`, which + // prevents them from being moved. But both of these values are really just + // pointers, so it's actually ok to move them. + let cursor_ref = mem::transmute::<_, &'static mut QueryCursor>(&mut cursor); + + // if reusing cursors & no range this resets to whole range + cursor_ref.set_byte_range(range.unwrap_or(0..usize::MAX)); + cursor_ref.set_match_limit(TREE_SITTER_MATCH_LIMIT); + + let captures = cursor_ref.captures(query, root, RopeProvider(source)); + + (cursor, captures) +} + #[derive(Debug)] pub struct Syntax { layers: HopSlotMap<LayerId, LanguageLayer>, @@ -1402,6 +1440,46 @@ impl Syntax { self.layers[self.root].tree() } + /// Iterate over all captures for a query across injection layers. + fn query_iter<'a, F>( + &'a self, + query_fn: F, + source: RopeSlice<'a>, + range: Option<std::ops::Range<usize>>, + ) -> impl Iterator<Item = (&'a LanguageLayer, QueryMatch<'a, 'a>, usize)> + where + F: Fn(&'a HighlightConfiguration) -> &'a Query, + { + let mut layers: Vec<_> = self + .layers + .iter() + .filter_map(|(_, layer)| { + let (cursor, captures) = unsafe { + query_captures( + query_fn(&layer.config), + layer.tree().root_node(), + source, + range.clone(), + ) + }; + let mut captures = captures.peekable(); + + // If there aren't any captures for this layer, skip the layer. + captures.peek()?; + + Some(QueryIterLayer { + cursor, + captures: RefCell::new(captures), + layer, + }) + }) + .collect(); + + layers.sort_unstable_by_key(|layer| layer.sort_key()); + + QueryIter { layers } + } + /// Iterate over the highlighted regions for a given slice of source code. pub fn highlight_iter<'a>( &'a self, @@ -1409,37 +1487,23 @@ impl Syntax { range: Option<std::ops::Range<usize>>, cancellation_flag: Option<&'a AtomicUsize>, ) -> impl Iterator<Item = Result<HighlightEvent, Error>> + 'a { - let mut layers = self + let mut layers: Vec<_> = self .layers .iter() .filter_map(|(_, layer)| { // TODO: if range doesn't overlap layer range, skip it - // Reuse a cursor from the pool if available. - let mut cursor = PARSER.with(|ts_parser| { - let highlighter = &mut ts_parser.borrow_mut(); - highlighter.cursors.pop().unwrap_or_else(QueryCursor::new) - }); - - // The `captures` iterator borrows the `Tree` and the `QueryCursor`, which - // prevents them from being moved. But both of these values are really just - // pointers, so it's actually ok to move them. - let cursor_ref = - unsafe { mem::transmute::<_, &'static mut QueryCursor>(&mut cursor) }; - - // if reusing cursors & no range this resets to whole range - cursor_ref.set_byte_range(range.clone().unwrap_or(0..usize::MAX)); - cursor_ref.set_match_limit(TREE_SITTER_MATCH_LIMIT); - - let mut captures = cursor_ref - .captures( + let (cursor, captures) = unsafe { + query_captures( &layer.config.query, layer.tree().root_node(), - RopeProvider(source), + source, + range.clone(), ) - .peekable(); + }; + let mut captures = captures.peekable(); - // If there's no captures, skip the layer + // If there are no captures, skip the layer captures.peek()?; Some(HighlightIterLayer { @@ -1456,11 +1520,13 @@ impl Syntax { depth: layer.depth, // TODO: just reuse `layer` }) }) - .collect::<Vec<_>>(); + .collect(); layers.sort_unstable_by_key(|layer| layer.sort_key()); - let mut result = HighlightIter { + sort_layers(&mut layers); + + HighlightIter { source, byte_offset: range.map_or(0, |r| r.start), cancellation_flag, @@ -1468,9 +1534,95 @@ impl Syntax { layers, next_event: None, last_highlight_range: None, - }; - result.sort_layers(); - result + } + } + + /// Queries for rainbow highlights in the given range. + pub fn rainbow_spans<'a>( + &'a self, + source: RopeSlice<'a>, + query_range: Option<std::ops::Range<usize>>, + rainbow_length: usize, + ) -> Vec<(usize, std::ops::Range<usize>)> { + struct RainbowScope { + end: usize, + node_id: Option<usize>, + highlight: usize, + } + + let mut spans = Vec::new(); + let mut scope_stack: Vec<RainbowScope> = Vec::new(); + + // Calculating rainbow highlights is similar to determining local highlights + // in the highlight iterator. We iterate over the query captures for + // `@rainbow.scope` and `@rainbow.bracket`: + // + // * `@rainbow.scope`: pushes a new `RainbowScope` onto the `scope_stack` + // stack. The number of `RainbowScope`s is the level of nesting within + // brackets and determines which color of the rainbow should be used as + // a highlight: `scope_stack.len() % rainbow_length`. + // + // * `@rainbow.bracket`: adds a new highlight span to the `spans` Vec. + // A `@rainbow.bracket` capture only creates a new highlight if that node + // is a child node of the latest node captured with `@rainbow.scope`, + // or if the last `RainbowScope` on the `scope_stack` was captured with + // the `(set! rainbow.include-children)` property. + // + // The iterator over the query captures returns captures across injection + // layers sorted by the earliest captures in the document first, so + // highlight colors are calculated correctly across injection layers. + + // Iterate over all of the captures for rainbow queries across injections. + for (layer, match_, capture_index) in + self.query_iter(|config| &config.rainbow_query, source, query_range) + { + let capture = match_.captures[capture_index]; + let range = capture.node.byte_range(); + + // If any scope in the stack ends before this new capture begins, + // pop the scope out of the scope stack. + while let Some(scope) = scope_stack.last() { + if range.start >= scope.end { + scope_stack.pop(); + } else { + break; + } + } + + if Some(capture.index) == layer.config.rainbow_scope_capture_index { + // If the capture is a "rainbow.scope", push it onto the scope stack. + let mut scope = RainbowScope { + end: range.end, + node_id: Some(capture.node.id()), + highlight: scope_stack.len() % rainbow_length, + }; + for prop in layer + .config + .rainbow_query + .property_settings(match_.pattern_index) + { + if prop.key.as_ref() == "rainbow.include-children" { + scope.node_id = None; + } + } + scope_stack.push(scope); + } else if Some(capture.index) == layer.config.rainbow_bracket_capture_index { + // If the capture is a "rainbow.bracket", check that the top of the scope stack + // is a valid scope for the bracket. The scope is valid if: + // * The scope's node is the direct parent of the captured node. + // * The scope has the "rainbow.include-children" property set. This allows the + // scope to match all descendant nodes in its range. + if let Some(scope) = scope_stack.last() { + if scope.node_id.is_none() + || capture.node.parent().map(|p| p.id()) == scope.node_id + { + spans.push((scope.highlight, range)); + } + } + } + } + + spans } pub fn tree_for_byte_range(&self, start: usize, end: usize) -> &Tree { @@ -1517,6 +1669,18 @@ impl Syntax { // TODO: Folding } +/// Finds the child of `node` which contains the given byte range `range`. +pub fn child_for_byte_range(node: Node, range: std::ops::Range<usize>) -> Option<Node> { + for child in node.children(&mut node.walk()) { + let child_range = child.byte_range(); + if range.start >= child_range.start && range.end <= child_range.end { + return Some(child); + } + } + + None +} + bitflags! { /// Flags that track the status of a layer /// in the `Sytaxn::update` function @@ -1765,7 +1929,8 @@ pub enum HighlightEvent { #[derive(Debug)] pub struct HighlightConfiguration { pub language: Grammar, - pub query: Query, + query: Query, + rainbow_query: Query, injections_query: Query, combined_injections_patterns: Vec<usize>, highlights_pattern_index: usize, @@ -1779,6 +1944,8 @@ pub struct HighlightConfiguration { local_def_capture_index: Option<u32>, local_def_value_capture_index: Option<u32>, local_ref_capture_index: Option<u32>, + rainbow_scope_capture_index: Option<u32>, + rainbow_bracket_capture_index: Option<u32>, } #[derive(Debug)] @@ -1863,6 +2030,7 @@ impl HighlightConfiguration { pub fn new( language: Grammar, highlights_query: &str, + rainbow_query: &str, injection_query: &str, locals_query: &str, ) -> Result<Self, QueryError> { @@ -1882,6 +2050,7 @@ impl HighlightConfiguration { highlights_pattern_index += 1; } } + let rainbow_query = Query::new(&language, rainbow_query)?; let injections_query = Query::new(&language, injection_query)?; let combined_injections_patterns = (0..injections_query.pattern_count()) @@ -1913,6 +2082,8 @@ impl HighlightConfiguration { let mut local_def_value_capture_index = None; let mut local_ref_capture_index = None; let mut local_scope_capture_index = None; + let mut rainbow_scope_capture_index = None; + let mut rainbow_bracket_capture_index = None; for (i, name) in query.capture_names().iter().enumerate() { let i = Some(i as u32); match *name { @@ -1924,6 +2095,15 @@ impl HighlightConfiguration { } } + for (i, name) in rainbow_query.capture_names().iter().enumerate() { + let i = Some(i as u32); + match *name { + "rainbow.scope" => rainbow_scope_capture_index = i, + "rainbow.bracket" => rainbow_bracket_capture_index = i, + _ => {} + } + } + for (i, name) in injections_query.capture_names().iter().enumerate() { let i = Some(i as u32); match *name { @@ -1939,6 +2119,7 @@ impl HighlightConfiguration { Ok(Self { language, query, + rainbow_query, injections_query, combined_injections_patterns, highlights_pattern_index, @@ -1952,6 +2133,8 @@ impl HighlightConfiguration { local_def_capture_index, local_def_value_capture_index, local_ref_capture_index, + rainbow_scope_capture_index, + rainbow_bracket_capture_index, }) } @@ -2096,11 +2279,21 @@ impl HighlightConfiguration { } } -impl<'a> HighlightIterLayer<'a> { - // First, sort scope boundaries by their byte offset in the document. At a - // given position, emit scope endings before scope beginnings. Finally, emit - // scope boundaries from deeper layers first. - fn sort_key(&self) -> Option<(usize, bool, isize)> { +trait IterLayer { + type SortKey: PartialOrd; + + fn sort_key(&self) -> Option<Self::SortKey>; + + fn cursor(self) -> QueryCursor; +} + +impl<'a> IterLayer for HighlightIterLayer<'a> { + type SortKey = (usize, bool, isize); + + fn sort_key(&self) -> Option<Self::SortKey> { + // First, sort scope boundaries by their byte offset in the document. At a + // given position, emit scope endings before scope beginnings. Finally, emit + // scope boundaries from deeper layers first. let depth = -(self.depth as isize); let next_start = self .captures @@ -2121,6 +2314,82 @@ impl<'a> HighlightIterLayer<'a> { _ => None, } } + + fn cursor(self) -> QueryCursor { + self.cursor + } +} + +impl<'a> IterLayer for QueryIterLayer<'a> { + type SortKey = (usize, isize); + + fn sort_key(&self) -> Option<Self::SortKey> { + // Sort the layers so that the first layer in the Vec has the next + // capture ordered by start byte and depth (descending). + let depth = -(self.layer.depth as isize); + let mut captures = self.captures.borrow_mut(); + let (match_, capture_index) = captures.peek()?; + let start = match_.captures[*capture_index].node.start_byte(); + + Some((start, depth)) + } + + fn cursor(self) -> QueryCursor { + self.cursor + } +} + +/// Re-sort the given layers so that the next capture for the `layers[0]` is +/// the earliest capture in the document for all layers. +/// +/// This function assumes that `layers` is already sorted except for the +/// first layer in the `Vec`. This function shifts the first layer later in +/// the `Vec` after any layers with earlier captures. +/// +/// This is quicker than a regular full sort: it can only take as many +/// iterations as the number of layers and usually takes many fewer than +/// the full number of layers. The case when `layers[0]` is already the +/// layer with the earliest capture and the sort is a no-op is a fast-lane +/// which only takes one comparison operation. +/// +/// This function also removes any layers which have no more query captures +/// to emit. +fn sort_layers<L: IterLayer>(layers: &mut Vec<L>) { + while !layers.is_empty() { + // If `Layer::sort_key` returns `None`, the layer has no more captures + // to emit and can be removed. + if let Some(sort_key) = layers[0].sort_key() { + let mut i = 0; + while i + 1 < layers.len() { + if let Some(next_offset) = layers[i + 1].sort_key() { + // Compare `0`'s sort key to `i + 1`'s. If `i + 1` comes + // before `0`, shift the `0` layer so it comes after the + // `i + 1` layers. + if next_offset < sort_key { + i += 1; + continue; + } + } else { + let layer = layers.remove(i + 1); + PARSER.with(|ts_parser| { + let highlighter = &mut ts_parser.borrow_mut(); + highlighter.cursors.push(layer.cursor()); + }); + } + break; + } + if i > 0 { + layers[0..(i + 1)].rotate_left(1); + } + break; + } else { + let layer = layers.remove(0); + PARSER.with(|ts_parser| { + let highlighter = &mut ts_parser.borrow_mut(); + highlighter.cursors.push(layer.cursor()); + }); + } + } } #[derive(Clone)] @@ -2251,42 +2520,9 @@ impl<'a> HighlightIter<'a> { } else { result = event.map(Ok); } - self.sort_layers(); + sort_layers(&mut self.layers); result } - - fn sort_layers(&mut self) { - while !self.layers.is_empty() { - if let Some(sort_key) = self.layers[0].sort_key() { - let mut i = 0; - while i + 1 < self.layers.len() { - if let Some(next_offset) = self.layers[i + 1].sort_key() { - if next_offset < sort_key { - i += 1; - continue; - } - } else { - let layer = self.layers.remove(i + 1); - PARSER.with(|ts_parser| { - let highlighter = &mut ts_parser.borrow_mut(); - highlighter.cursors.push(layer.cursor); - }); - } - break; - } - if i > 0 { - self.layers[0..(i + 1)].rotate_left(1); - } - break; - } else { - let layer = self.layers.remove(0); - PARSER.with(|ts_parser| { - let highlighter = &mut ts_parser.borrow_mut(); - highlighter.cursors.push(layer.cursor); - }); - } - } - } } impl<'a> Iterator for HighlightIter<'a> { @@ -2438,7 +2674,7 @@ impl<'a> Iterator for HighlightIter<'a> { } } - self.sort_layers(); + sort_layers(&mut self.layers); continue 'main; } @@ -2447,7 +2683,7 @@ impl<'a> Iterator for HighlightIter<'a> { // a different layer, then skip over this one. if let Some((last_start, last_end, last_depth)) = self.last_highlight_range { if range.start == last_start && range.end == last_end && layer.depth < last_depth { - self.sort_layers(); + sort_layers(&mut self.layers); continue 'main; } } @@ -2466,7 +2702,7 @@ impl<'a> Iterator for HighlightIter<'a> { } } - self.sort_layers(); + sort_layers(&mut self.layers); continue 'main; } } @@ -2501,7 +2737,7 @@ impl<'a> Iterator for HighlightIter<'a> { .emit_event(range.start, Some(HighlightEvent::HighlightStart(highlight))); } - self.sort_layers(); + sort_layers(&mut self.layers); } } } @@ -2711,6 +2947,42 @@ fn pretty_print_tree_impl<W: fmt::Write>( Ok(()) } +struct QueryIterLayer<'a> { + cursor: QueryCursor, + captures: RefCell<iter::Peekable<QueryCaptures<'a, 'a, RopeProvider<'a>, &'a [u8]>>>, + layer: &'a LanguageLayer, +} + +impl<'a> fmt::Debug for QueryIterLayer<'a> { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("QueryIterLayer").finish() + } +} + +#[derive(Debug)] +pub struct QueryIter<'a> { + layers: Vec<QueryIterLayer<'a>>, +} + +impl<'a> Iterator for QueryIter<'a> { + type Item = (&'a LanguageLayer, QueryMatch<'a, 'a>, usize); + + fn next(&mut self) -> Option<Self::Item> { + // Sort the layers so that the first layer contains the next capture. + sort_layers(&mut self.layers); + + // Emit the next capture from the lowest layer. If there are no more + // layers, terminate. + let layer = self.layers.get_mut(0)?; + let inner = layer.layer; + layer + .captures + .borrow_mut() + .next() + .map(|(match_, index)| (inner, match_, index)) + } +} + #[cfg(test)] mod test { use super::*; @@ -2741,7 +3013,7 @@ mod test { let textobject = TextObjectQuery { query }; let mut cursor = QueryCursor::new(); - let config = HighlightConfiguration::new(language, "", "", "").unwrap(); + let config = HighlightConfiguration::new(language, "", "", "", "").unwrap(); let syntax = Syntax::new( source.slice(..), Arc::new(config), @@ -2809,6 +3081,7 @@ mod test { language, &std::fs::read_to_string("../runtime/grammars/sources/rust/queries/highlights.scm") .unwrap(), + "", // rainbows.scm &std::fs::read_to_string("../runtime/grammars/sources/rust/queries/injections.scm") .unwrap(), "", // locals.scm @@ -2917,7 +3190,7 @@ mod test { .unwrap(); let language = get_language(language_name).unwrap(); - let config = HighlightConfiguration::new(language, "", "", "").unwrap(); + let config = HighlightConfiguration::new(language, "", "", "", "").unwrap(); let syntax = Syntax::new( source.slice(..), Arc::new(config), |