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cleanup: Import tree-sitter-highlight so we can cache trees.

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This commit is contained in:
Blaž Hrastnik 2020-09-11 14:14:44 +09:00
parent b647c7a773
commit b17a77b8b8
9 changed files with 1148 additions and 138 deletions
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13
Cargo.lock generated
View File

@ -372,6 +372,7 @@ dependencies = [
"ropey",
"smallvec",
"tendril",
"tree-sitter",
"unicode-segmentation",
"unicode-width",
]
@ -396,8 +397,6 @@ dependencies = [
"helix-syntax",
"num_cpus",
"smol",
"tree-sitter",
"tree-sitter-highlight",
"tui",
]
@ -719,16 +718,6 @@ dependencies = [
"regex",
]
[[package]]
name = "tree-sitter-highlight"
version = "0.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c6e3c800ac0db1562a045a4893cbbd7c484eb93426cae5632f9e5d24dd588cd1"
dependencies = [
"regex",
"tree-sitter",
]
[[package]]
name = "tui"
version = "0.10.0"

1
helix-core/Cargo.toml
View File

@ -14,3 +14,4 @@ tendril = { git = "https://github.com/servo/tendril" }
unicode-segmentation = "1.6.0"
unicode-width = "0.1.7"
# slab = "0.4.2"
tree-sitter = "0.16.1"

993
helix-core/src/language_mode.rs Normal file
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@ -0,0 +1,993 @@
pub struct LanguageMode {
parser: Parser,
}
impl LanguageMode {
// buffer, grammar, config, grammars, sync_timeout?
pub fn new() -> Self {
unimplemented!()
// make a new root layer
// track markers of injections
//
// track scope_descriptor: a Vec of scopes for item in tree
//
// fetch grammar for parser based on language string
// update root layer
}
// fn buffer_changed -> call layer.update(range, new_text) on root layer and then all marker layers
// call this on transaction.apply() -> buffer_changed(changes)
//
// fn parse(language, old_tree, ranges)
//
// fn tree() -> Tree
//
// <!--update_for_injection(grammar)-->
// Highlighting
// fn highlight_iter() -> iterates over all the scopes
// on_tokenize
// on_change_highlighting
// Commenting
// comment_strings_for_pos
// is_commented
// Indentation
// suggested_indent_for_line_at_buffer_row
// suggested_indent_for_buffer_row
// indent_level_for_line
// TODO: Folding
// Syntax APIs
// get_syntax_node_containing_range ->
// ...
// get_syntax_node_at_pos
// buffer_range_for_scope_at_pos
}
pub struct LanguageLayer {
// mode
// grammar
// depth
// tree: Tree,
}
impl LanguageLayer {
// fn highlight_iter() -> same as Mode but for this layer. Mode composits these
// fn buffer_changed
// fn update(range)
// fn update_injections()
}
// -- refactored from tree-sitter-highlight to be able to retain state
// TODO: add seek() to iter
use std::sync::atomic::{AtomicUsize, Ordering};
use std::{iter, mem, ops, str, usize};
use tree_sitter::{
Language, Node, Parser, Point, Query, QueryCaptures, QueryCursor, QueryError, QueryMatch,
Range, Tree,
};
const CANCELLATION_CHECK_INTERVAL: usize = 100;
const BUFFER_HTML_RESERVE_CAPACITY: usize = 10 * 1024;
const BUFFER_LINES_RESERVE_CAPACITY: usize = 1000;
/// Indicates which highlight should be applied to a region of source code.
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub struct Highlight(pub usize);
/// Represents the reason why syntax highlighting failed.
#[derive(Debug, PartialEq, Eq)]
pub enum Error {
Cancelled,
InvalidLanguage,
Unknown,
}
/// Represents a single step in rendering a syntax-highlighted document.
#[derive(Copy, Clone, Debug)]
pub enum HighlightEvent {
Source { start: usize, end: usize },
HighlightStart(Highlight),
HighlightEnd,
}
/// Contains the data neeeded to higlight code written in a particular language.
///
/// This struct is immutable and can be shared between threads.
pub struct HighlightConfiguration {
pub language: Language,
pub query: Query,
combined_injections_query: Option<Query>,
locals_pattern_index: usize,
highlights_pattern_index: usize,
highlight_indices: Vec<Option<Highlight>>,
non_local_variable_patterns: Vec<bool>,
injection_content_capture_index: Option<u32>,
injection_language_capture_index: Option<u32>,
local_scope_capture_index: Option<u32>,
local_def_capture_index: Option<u32>,
local_def_value_capture_index: Option<u32>,
local_ref_capture_index: Option<u32>,
}
/// Performs syntax highlighting, recognizing a given list of highlight names.
///
/// For the best performance `Highlighter` values should be reused between
/// syntax highlighting calls. A separate highlighter is needed for each thread that
/// is performing highlighting.
pub struct Highlighter {
parser: Parser,
cursors: Vec<QueryCursor>,
}
#[derive(Debug)]
struct LocalDef<'a> {
name: &'a str,
value_range: ops::Range<usize>,
highlight: Option<Highlight>,
}
#[derive(Debug)]
struct LocalScope<'a> {
inherits: bool,
range: ops::Range<usize>,
local_defs: Vec<LocalDef<'a>>,
}
struct HighlightIter<'a, F>
where
F: FnMut(&str) -> Option<&'a HighlightConfiguration> + 'a,
{
source: &'a [u8],
byte_offset: usize,
highlighter: &'a mut Highlighter,
injection_callback: F,
cancellation_flag: Option<&'a AtomicUsize>,
layers: Vec<HighlightIterLayer<'a>>,
iter_count: usize,
next_event: Option<HighlightEvent>,
last_highlight_range: Option<(usize, usize, usize)>,
}
struct HighlightIterLayer<'a> {
_tree: Tree,
cursor: QueryCursor,
captures: iter::Peekable<QueryCaptures<'a, &'a [u8]>>,
config: &'a HighlightConfiguration,
highlight_end_stack: Vec<usize>,
scope_stack: Vec<LocalScope<'a>>,
ranges: Vec<Range>,
depth: usize,
}
impl Highlighter {
pub fn new() -> Self {
Highlighter {
parser: Parser::new(),
cursors: Vec::new(),
}
}
pub fn parser(&mut self) -> &mut Parser {
&mut self.parser
}
/// Iterate over the highlighted regions for a given slice of source code.
pub fn highlight<'a>(
&'a mut self,
config: &'a HighlightConfiguration,
source: &'a [u8],
cancellation_flag: Option<&'a AtomicUsize>,
mut injection_callback: impl FnMut(&str) -> Option<&'a HighlightConfiguration> + 'a,
) -> Result<impl Iterator<Item = Result<HighlightEvent, Error>> + 'a, Error> {
let layers = HighlightIterLayer::new(
source,
self,
cancellation_flag,
&mut injection_callback,
config,
0,
vec![Range {
start_byte: 0,
end_byte: usize::MAX,
start_point: Point::new(0, 0),
end_point: Point::new(usize::MAX, usize::MAX),
}],
)?;
assert_ne!(layers.len(), 0);
let mut result = HighlightIter {
source,
byte_offset: 0,
injection_callback,
cancellation_flag,
highlighter: self,
iter_count: 0,
layers: layers,
next_event: None,
last_highlight_range: None,
};
result.sort_layers();
Ok(result)
}
}
impl HighlightConfiguration {
/// Creates a `HighlightConfiguration` for a given `Language` and set of highlighting
/// queries.
///
/// # Parameters
///
/// * `language` - The Tree-sitter `Language` that should be used for parsing.
/// * `highlights_query` - A string containing tree patterns for syntax highlighting. This
/// should be non-empty, otherwise no syntax highlights will be added.
/// * `injections_query` - A string containing tree patterns for injecting other languages
/// into the document. This can be empty if no injections are desired.
/// * `locals_query` - A string containing tree patterns for tracking local variable
/// definitions and references. This can be empty if local variable tracking is not needed.
///
/// Returns a `HighlightConfiguration` that can then be used with the `highlight` method.
pub fn new(
language: Language,
highlights_query: &str,
injection_query: &str,
locals_query: &str,
) -> Result<Self, QueryError> {
// Concatenate the query strings, keeping track of the start offset of each section.
let mut query_source = String::new();
query_source.push_str(injection_query);
let locals_query_offset = query_source.len();
query_source.push_str(locals_query);
let highlights_query_offset = query_source.len();
query_source.push_str(highlights_query);
// Construct a single query by concatenating the three query strings, but record the
// range of pattern indices that belong to each individual string.
let mut query = Query::new(language, &query_source)?;
let mut locals_pattern_index = 0;
let mut highlights_pattern_index = 0;
for i in 0..(query.pattern_count()) {
let pattern_offset = query.start_byte_for_pattern(i);
if pattern_offset < highlights_query_offset {
if pattern_offset < highlights_query_offset {
highlights_pattern_index += 1;
}
if pattern_offset < locals_query_offset {
locals_pattern_index += 1;
}
}
}
// Construct a separate query just for dealing with the 'combined injections'.
// Disable the combined injection patterns in the main query.
let mut combined_injections_query = Query::new(language, injection_query)?;
let mut has_combined_queries = false;
for pattern_index in 0..locals_pattern_index {
let settings = query.property_settings(pattern_index);
if settings.iter().any(|s| &*s.key == "injection.combined") {
has_combined_queries = true;
query.disable_pattern(pattern_index);
} else {
combined_injections_query.disable_pattern(pattern_index);
}
}
let combined_injections_query = if has_combined_queries {
Some(combined_injections_query)
} else {
None
};
// Find all of the highlighting patterns that are disabled for nodes that
// have been identified as local variables.
let non_local_variable_patterns = (0..query.pattern_count())
.map(|i| {
query
.property_predicates(i)
.iter()
.any(|(prop, positive)| !*positive && prop.key.as_ref() == "local")
})
.collect();
// Store the numeric ids for all of the special captures.
let mut injection_content_capture_index = None;
let mut injection_language_capture_index = None;
let mut local_def_capture_index = None;
let mut local_def_value_capture_index = None;
let mut local_ref_capture_index = None;
let mut local_scope_capture_index = None;
for (i, name) in query.capture_names().iter().enumerate() {
let i = Some(i as u32);
match name.as_str() {
"injection.content" => injection_content_capture_index = i,
"injection.language" => injection_language_capture_index = i,
"local.definition" => local_def_capture_index = i,
"local.definition-value" => local_def_value_capture_index = i,
"local.reference" => local_ref_capture_index = i,
"local.scope" => local_scope_capture_index = i,
_ => {}
}
}
let highlight_indices = vec![None; query.capture_names().len()];
Ok(HighlightConfiguration {
language,
query,
combined_injections_query,
locals_pattern_index,
highlights_pattern_index,
highlight_indices,
non_local_variable_patterns,
injection_content_capture_index,
injection_language_capture_index,
local_def_capture_index,
local_def_value_capture_index,
local_ref_capture_index,
local_scope_capture_index,
})
}
/// Get a slice containing all of the highlight names used in the configuration.
pub fn names(&self) -> &[String] {
self.query.capture_names()
}
/// Set the list of recognized highlight names.
///
/// Tree-sitter syntax-highlighting queries specify highlights in the form of dot-separated
/// highlight names like `punctuation.bracket` and `function.method.builtin`. Consumers of
/// these queries can choose to recognize highlights with different levels of specificity.
/// For example, the string `function.builtin` will match against `function.method.builtin`
/// and `function.builtin.constructor`, but will not match `function.method`.
///
/// When highlighting, results are returned as `Highlight` values, which contain the index
/// of the matched highlight this list of highlight names.
pub fn configure(&mut self, recognized_names: &[String]) {
let mut capture_parts = Vec::new();
self.highlight_indices.clear();
self.highlight_indices
.extend(self.query.capture_names().iter().map(move |capture_name| {
capture_parts.clear();
capture_parts.extend(capture_name.split('.'));
let mut best_index = None;
let mut best_match_len = 0;
for (i, recognized_name) in recognized_names.iter().enumerate() {
let mut len = 0;
let mut matches = true;
for part in recognized_name.split('.') {
len += 1;
if !capture_parts.contains(&part) {
matches = false;
break;
}
}
if matches && len > best_match_len {
best_index = Some(i);
best_match_len = len;
}
}
best_index.map(Highlight)
}));
}
}
impl<'a> HighlightIterLayer<'a> {
/// Create a new 'layer' of highlighting for this document.
///
/// In the even that the new layer contains "combined injections" (injections where multiple
/// disjoint ranges are parsed as one syntax tree), these will be eagerly processed and
/// added to the returned vector.
fn new<F: FnMut(&str) -> Option<&'a HighlightConfiguration> + 'a>(
source: &'a [u8],
highlighter: &mut Highlighter,
cancellation_flag: Option<&'a AtomicUsize>,
injection_callback: &mut F,
mut config: &'a HighlightConfiguration,
mut depth: usize,
mut ranges: Vec<Range>,
) -> Result<Vec<Self>, Error> {
let mut result = Vec::with_capacity(1);
let mut queue = Vec::new();
loop {
if highlighter.parser.set_included_ranges(&ranges).is_ok() {
highlighter
.parser
.set_language(config.language)
.map_err(|_| Error::InvalidLanguage)?;
unsafe { highlighter.parser.set_cancellation_flag(cancellation_flag) };
let tree = highlighter
.parser
.parse(source, None)
.ok_or(Error::Cancelled)?;
unsafe { highlighter.parser.set_cancellation_flag(None) };
let mut cursor = highlighter.cursors.pop().unwrap_or(QueryCursor::new());
// Process combined injections.
if let Some(combined_injections_query) = &config.combined_injections_query {
let mut injections_by_pattern_index =
vec![(None, Vec::new(), false); combined_injections_query.pattern_count()];
let matches =
cursor.matches(combined_injections_query, tree.root_node(), |n: Node| {
&source[n.byte_range()]
});
for mat in matches {
let entry = &mut injections_by_pattern_index[mat.pattern_index];
let (language_name, content_node, include_children) =
injection_for_match(config, combined_injections_query, &mat, source);
if language_name.is_some() {
entry.0 = language_name;
}
if let Some(content_node) = content_node {
entry.1.push(content_node);
}
entry.2 = include_children;
}
for (lang_name, content_nodes, includes_children) in injections_by_pattern_index
{
if let (Some(lang_name), false) = (lang_name, content_nodes.is_empty()) {
if let Some(next_config) = (injection_callback)(lang_name) {
let ranges = Self::intersect_ranges(
&ranges,
&content_nodes,
includes_children,
);
if !ranges.is_empty() {
queue.push((next_config, depth + 1, ranges));
}
}
}
}
}
// 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 tree_ref = unsafe { mem::transmute::<_, &'static Tree>(&tree) };
let cursor_ref =
unsafe { mem::transmute::<_, &'static mut QueryCursor>(&mut cursor) };
let captures = cursor_ref
.captures(&config.query, tree_ref.root_node(), move |n: Node| {
&source[n.byte_range()]
})
.peekable();
result.push(HighlightIterLayer {
highlight_end_stack: Vec::new(),
scope_stack: vec![LocalScope {
inherits: false,
range: 0..usize::MAX,
local_defs: Vec::new(),
}],
cursor,
depth,
_tree: tree,
captures,
config,
ranges,
});
}
if queue.is_empty() {
break;
} else {
let (next_config, next_depth, next_ranges) = queue.remove(0);
config = next_config;
depth = next_depth;
ranges = next_ranges;
}
}
Ok(result)
}
// Compute the ranges that should be included when parsing an injection.
// This takes into account three things:
// * `parent_ranges` - The ranges must all fall within the *current* layer's ranges.
// * `nodes` - Every injection takes place within a set of nodes. The injection ranges
// are the ranges of those nodes.
// * `includes_children` - For some injections, the content nodes' children should be
// excluded from the nested document, so that only the content nodes' *own* content
// is reparsed. For other injections, the content nodes' entire ranges should be
// reparsed, including the ranges of their children.
fn intersect_ranges(
parent_ranges: &[Range],
nodes: &[Node],
includes_children: bool,
) -> Vec<Range> {
let mut cursor = nodes[0].walk();
let mut result = Vec::new();
let mut parent_range_iter = parent_ranges.iter();
let mut parent_range = parent_range_iter
.next()
.expect("Layers should only be constructed with non-empty ranges vectors");
for node in nodes.iter() {
let mut preceding_range = Range {
start_byte: 0,
start_point: Point::new(0, 0),
end_byte: node.start_byte(),
end_point: node.start_position(),
};
let following_range = Range {
start_byte: node.end_byte(),
start_point: node.end_position(),
end_byte: usize::MAX,
end_point: Point::new(usize::MAX, usize::MAX),
};
for excluded_range in node
.children(&mut cursor)
.filter_map(|child| {
if includes_children {
None
} else {
Some(child.range())
}
})
.chain([following_range].iter().cloned())
{
let mut range = Range {
start_byte: preceding_range.end_byte,
start_point: preceding_range.end_point,
end_byte: excluded_range.start_byte,
end_point: excluded_range.start_point,
};
preceding_range = excluded_range;
if range.end_byte < parent_range.start_byte {
continue;
}
while parent_range.start_byte <= range.end_byte {
if parent_range.end_byte > range.start_byte {
if range.start_byte < parent_range.start_byte {
range.start_byte = parent_range.start_byte;
range.start_point = parent_range.start_point;
}
if parent_range.end_byte < range.end_byte {
if range.start_byte < parent_range.end_byte {
result.push(Range {
start_byte: range.start_byte,
start_point: range.start_point,
end_byte: parent_range.end_byte,
end_point: parent_range.end_point,
});
}
range.start_byte = parent_range.end_byte;
range.start_point = parent_range.end_point;
} else {
if range.start_byte < range.end_byte {
result.push(range);
}
break;
}
}
if let Some(next_range) = parent_range_iter.next() {
parent_range = next_range;
} else {
return result;
}
}
}
}
result
}
// 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(&mut self) -> Option<(usize, bool, isize)> {
let depth = -(self.depth as isize);
let next_start = self
.captures
.peek()
.map(|(m, i)| m.captures[*i].node.start_byte());
let next_end = self.highlight_end_stack.last().cloned();
match (next_start, next_end) {
(Some(start), Some(end)) => {
if start < end {
Some((start, true, depth))
} else {
Some((end, false, depth))
}
}
(Some(i), None) => Some((i, true, depth)),
(None, Some(j)) => Some((j, false, depth)),
_ => None,
}
}
}
impl<'a, F> HighlightIter<'a, F>
where
F: FnMut(&str) -> Option<&'a HighlightConfiguration> + 'a,
{
fn emit_event(
&mut self,
offset: usize,
event: Option<HighlightEvent>,
) -> Option<Result<HighlightEvent, Error>> {
let result;
if self.byte_offset < offset {
result = Some(Ok(HighlightEvent::Source {
start: self.byte_offset,
end: offset,
}));
self.byte_offset = offset;
self.next_event = event;
} else {
result = event.map(Ok);
}
self.sort_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;
}
}
break;
}
if i > 0 {
&self.layers[0..(i + 1)].rotate_left(1);
}
break;
} else {
let layer = self.layers.remove(0);
self.highlighter.cursors.push(layer.cursor);
}
}
}
fn insert_layer(&mut self, mut layer: HighlightIterLayer<'a>) {
if let Some(sort_key) = layer.sort_key() {
let mut i = 1;
while i < self.layers.len() {
if let Some(sort_key_i) = self.layers[i].sort_key() {
if sort_key_i > sort_key {
self.layers.insert(i, layer);
return;
}
i += 1;
} else {
self.layers.remove(i);
}
}
self.layers.push(layer);
}
}
}
impl<'a, F> Iterator for HighlightIter<'a, F>
where
F: FnMut(&str) -> Option<&'a HighlightConfiguration> + 'a,
{
type Item = Result<HighlightEvent, Error>;
fn next(&mut self) -> Option<Self::Item> {
'main: loop {
// If we've already determined the next highlight boundary, just return it.
if let Some(e) = self.next_event.take() {
return Some(Ok(e));
}
// Periodically check for cancellation, returning `Cancelled` error if the
// cancellation flag was flipped.
if let Some(cancellation_flag) = self.cancellation_flag {
self.iter_count += 1;
if self.iter_count >= CANCELLATION_CHECK_INTERVAL {
self.iter_count = 0;
if cancellation_flag.load(Ordering::Relaxed) != 0 {
return Some(Err(Error::Cancelled));
}
}
}
// If none of the layers have any more highlight boundaries, terminate.
if self.layers.is_empty() {
return if self.byte_offset < self.source.len() {
let result = Some(Ok(HighlightEvent::Source {
start: self.byte_offset,
end: self.source.len(),
}));
self.byte_offset = self.source.len();
result
} else {
None
};
}
// Get the next capture from whichever layer has the earliest highlight boundary.
let range;
let layer = &mut self.layers[0];
if let Some((next_match, capture_index)) = layer.captures.peek() {
let next_capture = next_match.captures[*capture_index];
range = next_capture.node.byte_range();
// If any previous highlight ends before this node starts, then before
// processing this capture, emit the source code up until the end of the
// previous highlight, and an end event for that highlight.
if let Some(end_byte) = layer.highlight_end_stack.last().cloned() {
if end_byte <= range.start {
layer.highlight_end_stack.pop();
return self.emit_event(end_byte, Some(HighlightEvent::HighlightEnd));
}
}
}
// If there are no more captures, then emit any remaining highlight end events.
// And if there are none of those, then just advance to the end of the document.
else if let Some(end_byte) = layer.highlight_end_stack.last().cloned() {
layer.highlight_end_stack.pop();
return self.emit_event(end_byte, Some(HighlightEvent::HighlightEnd));
} else {
return self.emit_event(self.source.len(), None);
};
let (mut match_, capture_index) = layer.captures.next().unwrap();
let mut capture = match_.captures[capture_index];
// If this capture represents an injection, then process the injection.
if match_.pattern_index < layer.config.locals_pattern_index {
let (language_name, content_node, include_children) =
injection_for_match(&layer.config, &layer.config.query, &match_, &self.source);
// Explicitly remove this match so that none of its other captures will remain
// in the stream of captures.
match_.remove();
// If a language is found with the given name, then add a new language layer
// to the highlighted document.
if let (Some(language_name), Some(content_node)) = (language_name, content_node) {
if let Some(config) = (self.injection_callback)(language_name) {
let ranges = HighlightIterLayer::intersect_ranges(
&self.layers[0].ranges,
&[content_node],
include_children,
);
if !ranges.is_empty() {
match HighlightIterLayer::new(
self.source,
self.highlighter,
self.cancellation_flag,
&mut self.injection_callback,
config,
self.layers[0].depth + 1,
ranges,
) {
Ok(layers) => {
for layer in layers {
self.insert_layer(layer);
}
}
Err(e) => return Some(Err(e)),
}
}
}
}
self.sort_layers();
continue 'main;
}
// Remove from the local scope stack any local scopes that have already ended.
while range.start > layer.scope_stack.last().unwrap().range.end {
layer.scope_stack.pop();
}
// If this capture is for tracking local variables, then process the
// local variable info.
let mut reference_highlight = None;
let mut definition_highlight = None;
while match_.pattern_index < layer.config.highlights_pattern_index {
// If the node represents a local scope, push a new local scope onto
// the scope stack.
if Some(capture.index) == layer.config.local_scope_capture_index {
definition_highlight = None;
let mut scope = LocalScope {
inherits: true,
range: range.clone(),
local_defs: Vec::new(),
};
for prop in layer.config.query.property_settings(match_.pattern_index) {
match prop.key.as_ref() {
"local.scope-inherits" => {
scope.inherits =
prop.value.as_ref().map_or(true, |r| r.as_ref() == "true");
}
_ => {}
}
}
layer.scope_stack.push(scope);
}
// If the node represents a definition, add a new definition to the
// local scope at the top of the scope stack.
else if Some(capture.index) == layer.config.local_def_capture_index {
reference_highlight = None;
definition_highlight = None;
let scope = layer.scope_stack.last_mut().unwrap();
let mut value_range = 0..0;
for capture in match_.captures {
if Some(capture.index) == layer.config.local_def_value_capture_index {
value_range = capture.node.byte_range();
}
}
if let Ok(name) = str::from_utf8(&self.source[range.clone()]) {
scope.local_defs.push(LocalDef {
name,
value_range,
highlight: None,
});
definition_highlight =
scope.local_defs.last_mut().map(|s| &mut s.highlight);
}
}
// If the node represents a reference, then try to find the corresponding
// definition in the scope stack.
else if Some(capture.index) == layer.config.local_ref_capture_index {
if definition_highlight.is_none() {
definition_highlight = None;
if let Ok(name) = str::from_utf8(&self.source[range.clone()]) {
for scope in layer.scope_stack.iter().rev() {
if let Some(highlight) =
scope.local_defs.iter().rev().find_map(|def| {
if def.name == name && range.start >= def.value_range.end {
Some(def.highlight)
} else {
None
}
})
{
reference_highlight = highlight;
break;
}
if !scope.inherits {
break;
}
}
}
}
}
// Continue processing any additional matches for the same node.
if let Some((next_match, next_capture_index)) = layer.captures.peek() {
let next_capture = next_match.captures[*next_capture_index];
if next_capture.node == capture.node {
capture = next_capture;
match_ = layer.captures.next().unwrap().0;
continue;
}
}
self.sort_layers();
continue 'main;
}
// Otherwise, this capture must represent a highlight.
// If this exact range has already been highlighted by an earlier pattern, or by
// 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();
continue 'main;
}
}
// If the current node was found to be a local variable, then skip over any
// highlighting patterns that are disabled for local variables.
if definition_highlight.is_some() || reference_highlight.is_some() {
while layer.config.non_local_variable_patterns[match_.pattern_index] {
if let Some((next_match, next_capture_index)) = layer.captures.peek() {
let next_capture = next_match.captures[*next_capture_index];
if next_capture.node == capture.node {
capture = next_capture;
match_ = layer.captures.next().unwrap().0;
continue;
}
}
self.sort_layers();
continue 'main;
}
}
// Once a highlighting pattern is found for the current node, skip over
// any later highlighting patterns that also match this node. Captures
// for a given node are ordered by pattern index, so these subsequent
// captures are guaranteed to be for highlighting, not injections or
// local variables.
while let Some((next_match, next_capture_index)) = layer.captures.peek() {
let next_capture = next_match.captures[*next_capture_index];
if next_capture.node == capture.node {
layer.captures.next();
} else {
break;
}
}
let current_highlight = layer.config.highlight_indices[capture.index as usize];
// If this node represents a local definition, then store the current
// highlight value on the local scope entry representing this node.
if let Some(definition_highlight) = definition_highlight {
*definition_highlight = current_highlight;
}
// Emit a scope start event and push the node's end position to the stack.
if let Some(highlight) = reference_highlight.or(current_highlight) {
self.last_highlight_range = Some((range.start, range.end, layer.depth));
layer.highlight_end_stack.push(range.end);
return self
.emit_event(range.start, Some(HighlightEvent::HighlightStart(highlight)));
}
self.sort_layers();
}
}
}
fn injection_for_match<'a>(
config: &HighlightConfiguration,
query: &'a Query,
query_match: &QueryMatch<'a>,
source: &'a [u8],
) -> (Option<&'a str>, Option<Node<'a>>, bool) {
let content_capture_index = config.injection_content_capture_index;
let language_capture_index = config.injection_language_capture_index;
let mut language_name = None;
let mut content_node = None;
for capture in query_match.captures {
let index = Some(capture.index);
if index == language_capture_index {
language_name = capture.node.utf8_text(source).ok();
} else if index == content_capture_index {
content_node = Some(capture.node);
}
}
let mut include_children = false;
for prop in query.property_settings(query_match.pattern_index) {
match prop.key.as_ref() {
// In addition to specifying the language name via the text of a
// captured node, it can also be hard-coded via a `#set!` predicate
// that sets the injection.language key.
"injection.language" => {
if language_name.is_none() {
language_name = prop.value.as_ref().map(|s| s.as_ref())
}
}
// By default, injections do not include the *children* of an
// `injection.content` node - only the ranges that belong to the
// node itself. This can be changed using a `#set!` predicate that
// sets the `injection.include-children` key.
"injection.include-children" => include_children = true,
_ => {}
}
}
(language_name, content_node, include_children)
}
fn shrink_and_clear<T>(vec: &mut Vec<T>, capacity: usize) {
if vec.len() > capacity {
vec.truncate(capacity);
vec.shrink_to_fit();
}
vec.clear();
}

1
helix-core/src/lib.rs
View File

@ -1,6 +1,7 @@
#![allow(unused)]
pub mod commands;
pub mod graphemes;
pub mod language_mode;
mod selection;
pub mod state;
mod transaction;

5
helix-syntax/build.rs
View File

@ -1,7 +1,4 @@
use cc::Build;
use std::io::{BufWriter, Read, Write};
use std::path::{Path, PathBuf};
use std::path::PathBuf;
use std::{env, fs};
fn get_opt_level() -> u32 {

2
helix-term/Cargo.toml
View File

@ -24,5 +24,3 @@ crossterm = { version = "0.17", features = ["event-stream"] }
smol = "1"
num_cpus = "1.13.0"
tui = { version = "0.10.0", default-features = false, features = ["crossterm"] }
tree-sitter = "0.16.1"
tree-sitter-highlight = "0.2.0"

211
helix-term/src/editor.rs
View File

@ -1,5 +1,21 @@
use crate::{keymap, Args};
use crate::{keymap, theme::Theme, Args};
use helix_core::{
language_mode::{HighlightConfiguration, HighlightEvent, Highlighter},
state::coords_at_pos,
state::Mode,
State,
};
use std::{
io::{self, stdout, Write},
path::PathBuf,
time::Duration,
};
use smol::prelude::*;
use anyhow::Error;
use crossterm::{
cursor,
cursor::position,
@ -9,17 +25,7 @@
terminal::{self, disable_raw_mode, enable_raw_mode},
};
use helix_core::{state::coords_at_pos, state::Mode, State};
use smol::prelude::*;
use std::collections::HashMap;
use std::io::{self, stdout, Write};
use std::path::PathBuf;
use std::time::Duration;
use tui::backend::CrosstermBackend;
use tui::buffer::Buffer as Surface;
use tui::layout::Rect;
use tui::style::Style;
use tui::{backend::CrosstermBackend, buffer::Buffer as Surface, layout::Rect, style::Style};
type Terminal = tui::Terminal<CrosstermBackend<std::io::Stdout>>;
@ -31,7 +37,10 @@ pub struct Editor {
first_line: u16,
size: (u16, u16),
surface: Surface,
theme: HashMap<&'static str, Style>,
theme: Theme,
highlighter: Highlighter,
highlight_config: HighlightConfiguration,
highlight_names: Vec<String>,
}
impl Editor {
@ -42,43 +51,60 @@ pub fn new(mut args: Args) -> Result<Self, Error> {
let size = terminal::size().unwrap();
let area = Rect::new(0, 0, size.0, size.1);
use tui::style::Color;
let theme = hashmap! {
"attribute" => Style::default().fg(Color::Rgb(219, 191, 239)), // lilac
"keyword" => Style::default().fg(Color::Rgb(236, 205, 186)), // almond
"punctuation" => Style::default().fg(Color::Rgb(164, 160, 232)), // lavender
"punctuation.delimiter" => Style::default().fg(Color::Rgb(164, 160, 232)), // lavender
"operator" => Style::default().fg(Color::Rgb(219, 191, 239)), // lilac
"property" => Style::default().fg(Color::Rgb(164, 160, 232)), // lavender
"variable.parameter" => Style::default().fg(Color::Rgb(164, 160, 232)), // lavender
// TODO distinguish type from type.builtin?
"type" => Style::default().fg(Color::Rgb(255, 255, 255)), // white
"type.builtin" => Style::default().fg(Color::Rgb(255, 255, 255)), // white
"constructor" => Style::default().fg(Color::Rgb(219, 191, 239)), // lilac
"function" => Style::default().fg(Color::Rgb(255, 255, 255)), // white
"function.macro" => Style::default().fg(Color::Rgb(219, 191, 239)), // lilac
"comment" => Style::default().fg(Color::Rgb(105, 124, 129)), // sirocco
"variable.builtin" => Style::default().fg(Color::Rgb(159, 242, 143)), // mint
"constant" => Style::default().fg(Color::Rgb(255, 255, 255)), // white
"constant.builtin" => Style::default().fg(Color::Rgb(255, 255, 255)), // white
"string" => Style::default().fg(Color::Rgb(204, 204, 204)), // silver
"escape" => Style::default().fg(Color::Rgb(239, 186, 93)), // honey
// used for lifetimes
"label" => Style::default().fg(Color::Rgb(239, 186, 93)), // honey
let highlight_names: Vec<String> = [
"attribute",
"constant.builtin",
"constant",
"function.builtin",
"function.macro",
"function",
"keyword",
"operator",
"property",
"punctuation",
"comment",
"escape",
"label",
// "punctuation.bracket",
"punctuation.delimiter",
"string",
"string.special",
"tag",
"type",
"type.builtin",
"constructor",
"variable",
"variable.builtin",
"variable.parameter",
"path",
]
.iter()
.map(|s| s.to_string())
.collect();
// TODO: diferentiate number builtin
// TODO: diferentiate doc comment
// TODO: variable as lilac
// TODO: mod/use statements as white
// TODO: mod stuff as chamoise
// TODO: add "(scoped_identifier) @path" for std::mem::
//
// concat (ERROR) @syntax-error and "MISSING ;" selectors for errors
// let mut parser = tree_sitter::Parser::new();
// parser.set_language(language).unwrap();
// let tree = parser.parse(source_code, None).unwrap();
"module" => Style::default().fg(Color::Rgb(255, 0, 0)), // white
"variable" => Style::default().fg(Color::Rgb(255, 0, 0)), // white
"function.builtin" => Style::default().fg(Color::Rgb(255, 0, 0)), // white
};
let language = helix_syntax::get_language(&helix_syntax::LANG::Rust);
let highlighter = Highlighter::new();
let mut highlight_config = HighlightConfiguration::new(
language,
&std::fs::read_to_string(
"../helix-syntax/languages/tree-sitter-rust/queries/highlights.scm",
)
.unwrap(),
&std::fs::read_to_string(
"../helix-syntax/languages/tree-sitter-rust/queries/injections.scm",
)
.unwrap(),
"", // locals.scm
)
.unwrap();
highlight_config.configure(&highlight_names);
let mut editor = Editor {
terminal,
@ -86,7 +112,11 @@ pub fn new(mut args: Args) -> Result<Self, Error> {
first_line: 0,
size,
surface: Surface::empty(area),
theme,
theme: Theme::default(),
// TODO; move to state
highlighter,
highlight_config,
highlight_names,
};
if let Some(file) = args.files.pop() {
@ -108,72 +138,16 @@ fn render(&mut self) {
let mut surface = Surface::empty(area);
let mut stdout = stdout();
//
use tree_sitter_highlight::{HighlightConfiguration, HighlightEvent, Highlighter};
let highlight_names: Vec<String> = [
"attribute",
"constant.builtin",
"constant",
"function.builtin",
"function.macro",
"function",
"keyword",
"operator",
"property",
"punctuation",
"comment",
"escape",
"label",
// "punctuation.bracket",
"punctuation.delimiter",
"string",
"string.special",
"tag",
"type",
"type.builtin",
"constructor",
"variable",
"variable.builtin",
"variable.parameter",
"path",
]
.iter()
.cloned()
.map(String::from)
.collect();
let language = helix_syntax::get_language(&helix_syntax::LANG::Rust);
// let mut parser = tree_sitter::Parser::new();
// parser.set_language(language).unwrap();
// let tree = parser.parse(source_code, None).unwrap();
let mut highlighter = Highlighter::new();
let mut config = HighlightConfiguration::new(
language,
&std::fs::read_to_string(
"../helix-syntax/languages/tree-sitter-rust/queries/highlights.scm",
)
.unwrap(),
&std::fs::read_to_string(
"../helix-syntax/languages/tree-sitter-rust/queries/injections.scm",
)
.unwrap(),
"", // locals.scm
)
.unwrap();
config.configure(&highlight_names);
// TODO: inefficient, should feed chunks.iter() to tree_sitter.parse_with(|offset,
// pos|)
// TODO: inefficient, should feed chunks.iter() to tree_sitter.parse_with(|offset, pos|)
let source_code = state.doc.to_string();
// TODO: cache highlight results
// TODO: only recalculate when state.doc is actually modified
let highlights = highlighter
.highlight(&config, source_code.as_bytes(), None, |_| None)
let highlights = self
.highlighter
.highlight(&self.highlight_config, source_code.as_bytes(), None, |_| {
None
})
.unwrap();
let mut spans = Vec::new();
@ -186,12 +160,10 @@ fn render(&mut self) {
for event in highlights {
match event.unwrap() {
HighlightEvent::HighlightStart(span) => {
// eprintln!("highlight style started: {:?}", highlight_names[span.0]);
spans.push(span);
}
HighlightEvent::HighlightEnd => {
spans.pop();
// eprintln!("highlight style ended");
}
HighlightEvent::Source { start, end } => {
// TODO: filter out spans out of viewport for now..
@ -204,17 +176,16 @@ fn render(&mut self) {
use helix_core::graphemes::{grapheme_width, RopeGraphemes};
use tui::style::Color;
let style = match spans.first() {
Some(span) => self
.theme
.get(highlight_names[span.0].as_str())
.map(|style| *style)
.unwrap_or(Style::default().fg(Color::Rgb(0, 0, 255))),
let style = match spans.first() {
Some(span) => self.theme.get(self.highlight_names[span.0].as_str()),
None => Style::default().fg(Color::Rgb(164, 160, 232)), // lavender
// None => Style::default().fg(Color::Rgb(219, 191, 239)), // lilac
};
// TODO: we could render the text to a surface, then cache that, that
// way if only the selection/cursor changes we can copy from cache
// and paint the new cursor.
// iterate over range char by char
for grapheme in RopeGraphemes::new(&text) {
// TODO: track current char_index

1
helix-term/src/main.rs
View File

@ -3,6 +3,7 @@
mod macros;
mod editor;
mod keymap;
mod theme;
use editor::Editor;

59
helix-term/src/theme.rs Normal file
View File

@ -0,0 +1,59 @@
use std::collections::HashMap;
use tui::style::{Color, Style};
/// Color theme for syntax highlighting.
pub struct Theme {
mapping: HashMap<&'static str, Style>,
}
impl Default for Theme {
fn default() -> Self {
let mapping = hashmap! {
"attribute" => Style::default().fg(Color::Rgb(219, 191, 239)), // lilac
"keyword" => Style::default().fg(Color::Rgb(236, 205, 186)), // almond
"punctuation" => Style::default().fg(Color::Rgb(164, 160, 232)), // lavender
"punctuation.delimiter" => Style::default().fg(Color::Rgb(164, 160, 232)), // lavender
"operator" => Style::default().fg(Color::Rgb(219, 191, 239)), // lilac
"property" => Style::default().fg(Color::Rgb(164, 160, 232)), // lavender
"variable.parameter" => Style::default().fg(Color::Rgb(164, 160, 232)), // lavender
// TODO distinguish type from type.builtin?
"type" => Style::default().fg(Color::Rgb(255, 255, 255)), // white
"type.builtin" => Style::default().fg(Color::Rgb(255, 255, 255)), // white
"constructor" => Style::default().fg(Color::Rgb(219, 191, 239)), // lilac
"function" => Style::default().fg(Color::Rgb(255, 255, 255)), // white
"function.macro" => Style::default().fg(Color::Rgb(219, 191, 239)), // lilac
"comment" => Style::default().fg(Color::Rgb(105, 124, 129)), // sirocco
"variable.builtin" => Style::default().fg(Color::Rgb(159, 242, 143)), // mint
"constant" => Style::default().fg(Color::Rgb(255, 255, 255)), // white
"constant.builtin" => Style::default().fg(Color::Rgb(255, 255, 255)), // white
"string" => Style::default().fg(Color::Rgb(204, 204, 204)), // silver
"escape" => Style::default().fg(Color::Rgb(239, 186, 93)), // honey
// used for lifetimes
"label" => Style::default().fg(Color::Rgb(239, 186, 93)), // honey
// TODO: diferentiate number builtin
// TODO: diferentiate doc comment
// TODO: variable as lilac
// TODO: mod/use statements as white
// TODO: mod stuff as chamoise
// TODO: add "(scoped_identifier) @path" for std::mem::
//
// concat (ERROR) @syntax-error and "MISSING ;" selectors for errors
"module" => Style::default().fg(Color::Rgb(255, 0, 0)), // white
"variable" => Style::default().fg(Color::Rgb(255, 0, 0)), // white
"function.builtin" => Style::default().fg(Color::Rgb(255, 0, 0)), // white
};
Self { mapping }
}
}
impl Theme {
pub fn get(&self, scope: &str) -> Style {
self.mapping
.get(scope)
.copied()
.unwrap_or_else(|| Style::default().fg(Color::Rgb(0, 0, 255)))
}
}