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-rw-r--r--helix-core/src/match_brackets.rs81
1 files changed, 44 insertions, 37 deletions
diff --git a/helix-core/src/match_brackets.rs b/helix-core/src/match_brackets.rs
index 434df904..7fda6d7e 100644
--- a/helix-core/src/match_brackets.rs
+++ b/helix-core/src/match_brackets.rs
@@ -1,8 +1,10 @@
use std::iter;
+use ropey::RopeSlice;
use tree_sitter::Node;
-use crate::{Rope, Syntax};
+use crate::movement::Direction::{self, Backward, Forward};
+use crate::Syntax;
const MAX_PLAINTEXT_SCAN: usize = 10000;
const MATCH_LIMIT: usize = 16;
@@ -27,7 +29,7 @@ const PAIRS: &[(char, char)] = &[
///
/// If no matching bracket is found, `None` is returned.
#[must_use]
-pub fn find_matching_bracket(syntax: &Syntax, doc: &Rope, pos: usize) -> Option<usize> {
+pub fn find_matching_bracket(syntax: &Syntax, doc: RopeSlice, pos: usize) -> Option<usize> {
if pos >= doc.len_chars() || !is_valid_bracket(doc.char(pos)) {
return None;
}
@@ -45,13 +47,18 @@ pub fn find_matching_bracket(syntax: &Syntax, doc: &Rope, pos: usize) -> Option<
//
// If no surrounding scope is found, the function returns `None`.
#[must_use]
-pub fn find_matching_bracket_fuzzy(syntax: &Syntax, doc: &Rope, pos: usize) -> Option<usize> {
+pub fn find_matching_bracket_fuzzy(syntax: &Syntax, doc: RopeSlice, pos: usize) -> Option<usize> {
find_pair(syntax, doc, pos, true)
}
-fn find_pair(syntax: &Syntax, doc: &Rope, pos: usize, traverse_parents: bool) -> Option<usize> {
+fn find_pair(
+ syntax: &Syntax,
+ doc: RopeSlice,
+ pos_: usize,
+ traverse_parents: bool,
+) -> Option<usize> {
let tree = syntax.tree();
- let pos = doc.char_to_byte(pos);
+ let pos = doc.char_to_byte(pos_);
let mut node = tree.root_node().descendant_for_byte_range(pos, pos)?;
@@ -92,7 +99,7 @@ fn find_pair(syntax: &Syntax, doc: &Rope, pos: usize, traverse_parents: bool) ->
}
}
if node.is_named() {
- return None;
+ break;
}
}
@@ -104,8 +111,16 @@ fn find_pair(syntax: &Syntax, doc: &Rope, pos: usize, traverse_parents: bool) ->
return doc.try_byte_to_char(close.start_byte()).ok();
}
}
- node = node.parent()?;
+ let Some(parent) = node.parent() else { break; };
+ node = parent;
+ }
+ let node = tree.root_node().named_descendant_for_byte_range(pos, pos)?;
+ if node.child_count() != 0 {
+ return None;
}
+ let node_start = doc.byte_to_char(node.start_byte());
+ find_matching_bracket_plaintext(doc.byte_slice(node.byte_range()), pos_ - node_start)
+ .map(|pos| pos + node_start)
}
/// Returns the position of the matching bracket under cursor.
@@ -120,10 +135,7 @@ fn find_pair(syntax: &Syntax, doc: &Rope, pos: usize, traverse_parents: bool) ->
///
/// If no matching bracket is found, `None` is returned.
#[must_use]
-pub fn find_matching_bracket_current_line_plaintext(
- doc: &Rope,
- cursor_pos: usize,
-) -> Option<usize> {
+pub fn find_matching_bracket_plaintext(doc: RopeSlice, cursor_pos: usize) -> Option<usize> {
// Don't do anything when the cursor is not on top of a bracket.
let bracket = doc.char(cursor_pos);
if !is_valid_bracket(bracket) {
@@ -179,11 +191,11 @@ fn is_forward_bracket(c: char) -> bool {
PAIRS.iter().any(|(l, _)| *l == c)
}
-fn is_valid_pair(doc: &Rope, start_char: usize, end_char: usize) -> bool {
+fn is_valid_pair(doc: RopeSlice, start_char: usize, end_char: usize) -> bool {
PAIRS.contains(&(doc.char(start_char), doc.char(end_char)))
}
-fn surrounding_bytes(doc: &Rope, node: &Node) -> Option<(usize, usize)> {
+fn surrounding_bytes(doc: RopeSlice, node: &Node) -> Option<(usize, usize)> {
let len = doc.len_bytes();
let start_byte = node.start_byte();
@@ -196,22 +208,8 @@ fn surrounding_bytes(doc: &Rope, node: &Node) -> Option<(usize, usize)> {
Some((start_byte, end_byte))
}
-/// Checks if `node` or its siblings (at most MATCH_LIMIT nodes) is the specified openiing char
-///
-/// # Returns
-///
-/// The position of the found node or `None` otherwise
-fn find_open_pair(doc: &Rope, node: Option<Node>, open: char) -> Option<usize> {
- iter::successors(node, |node| node.prev_sibling())
- .take(MATCH_LIMIT)
- .find_map(|node| {
- let (pos, c) = as_char(doc, &node)?;
- (c == open).then_some(pos)
- })
-}
-
/// Tests if this node is a pair close char and returns the expected open char
-fn as_close_pair(doc: &Rope, node: &Node) -> Option<char> {
+fn as_close_pair(doc: RopeSlice, node: &Node) -> Option<char> {
let close = as_char(doc, node)?.1;
PAIRS
.iter()
@@ -223,8 +221,17 @@ fn as_close_pair(doc: &Rope, node: &Node) -> Option<char> {
/// # Returns
///
/// The position of the found node or `None` otherwise
-fn find_close_pair(doc: &Rope, node: Option<Node>, close: char) -> Option<usize> {
- iter::successors(node, |node| node.next_sibling())
+fn find_pair_end(
+ doc: RopeSlice,
+ node: Option<Node>,
+ end_char: char,
+ direction: Direction,
+) -> Option<usize> {
+ let advance = match direction {
+ Forward => Node::next_sibling,
+ Backward => Node::prev_sibling,
+ };
+ iter::successors(node, advance)
.take(MATCH_LIMIT)
.find_map(|node| {
let (pos, c) = as_char(doc, &node)?;
@@ -233,15 +240,15 @@ fn find_close_pair(doc: &Rope, node: Option<Node>, close: char) -> Option<usize>
}
/// Tests if this node is a pair close char and returns the expected open char
-fn as_open_pair(doc: &Rope, node: &Node) -> Option<char> {
- let close = as_char(doc, node)?.1;
+fn as_open_pair(doc: RopeSlice, node: &Node) -> Option<char> {
+ let open = as_char(doc, node)?.1;
PAIRS
.iter()
.find_map(|&(open_, close)| (open_ == open).then_some(close))
}
-/// Tests if this node is a pair opening and returns the expected close char
-fn as_char(doc: &Rope, node: &Node) -> Option<(usize, char)> {
+/// If node is a single char return it (and its char position)
+fn as_char(doc: RopeSlice, node: &Node) -> Option<(usize, char)> {
// TODO: multi char/non ASCII pairs
if node.byte_range().len() != 1 {
return None;
@@ -257,11 +264,11 @@ mod tests {
#[test]
fn test_find_matching_bracket_current_line_plaintext() {
let assert = |input: &str, pos, expected| {
- let input = &Rope::from(input);
- let actual = find_matching_bracket_current_line_plaintext(input, pos);
+ let input = RopeSlice::from(input);
+ let actual = find_matching_bracket_plaintext(input, pos);
assert_eq!(expected, actual.unwrap());
- let actual = find_matching_bracket_current_line_plaintext(input, expected);
+ let actual = find_matching_bracket_plaintext(input, expected);
assert_eq!(pos, actual.unwrap(), "expected symmetrical behaviour");
};
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-23 02:58:36 +0000