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robustly handle invalid LSP ranges (#6512)

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Pascal Kuthe 2023-04-03 03:58:50 +02:00 • committed by GitHub
parent bfe8d267fe
commit 1073dd6329
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2 changed files with 26 additions and 15 deletions
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25
helix-lsp/src/lib.rs
View file

@ -132,7 +132,11 @@ pub mod util {
) -> Option<usize> {
let pos_line = pos.line as usize;
if pos_line > doc.len_lines() - 1 {
return None;
// If it extends past the end, truncate it to the end. This is because the
// way the LSP describes the range including the last newline is by
// specifying a line number after what we would call the last line.
log::warn!("LSP position {pos:?} out of range assuming EOF");
return Some(doc.len_chars());
}
// We need to be careful here to fully comply ith the LSP spec.
@ -242,9 +246,20 @@ pub mod util {
pub fn lsp_range_to_range(
doc: &Rope,
range: lsp::Range,
mut range: lsp::Range,
offset_encoding: OffsetEncoding,
) -> Option<Range> {
// This is sort of an edgecase. It's not clear from the spec how to deal with
// ranges where end < start. They don't make much sense but vscode simply caps start to end
// and because it's not specified quite a few LS rely on this as a result (for example the TS server)
if range.start > range.end {
log::error!(
"Invalid LSP range start {:?} > end {:?}, using an empty range at the end instead",
range.start,
range.end
);
range.start = range.end;
}
let start = lsp_pos_to_pos(doc, range.start, offset_encoding)?;
let end = lsp_pos_to_pos(doc, range.end, offset_encoding)?;
@ -951,16 +966,16 @@ mod tests {
test_case!("", (0, 0) => Some(0));
test_case!("", (0, 1) => Some(0));
test_case!("", (1, 0) => None);
test_case!("", (1, 0) => Some(0));
test_case!("\n\n", (0, 0) => Some(0));
test_case!("\n\n", (1, 0) => Some(1));
test_case!("\n\n", (1, 1) => Some(1));
test_case!("\n\n", (2, 0) => Some(2));
test_case!("\n\n", (3, 0) => None);
test_case!("\n\n", (3, 0) => Some(2));
test_case!("test\n\n\n\ncase", (4, 3) => Some(11));
test_case!("test\n\n\n\ncase", (4, 4) => Some(12));
test_case!("test\n\n\n\ncase", (4, 5) => Some(12));
test_case!("", (u32::MAX, u32::MAX) => None);
test_case!("", (u32::MAX, u32::MAX) => Some(0));
}
#[test]

16
helix-term/src/ui/completion.rs
View file

@ -141,16 +141,12 @@ impl Completion {
}
};
let start_offset =
match util::lsp_pos_to_pos(doc.text(), edit.range.start, offset_encoding) {
Some(start) => start as i128 - primary_cursor as i128,
None => return Transaction::new(doc.text()),
};
let end_offset =
match util::lsp_pos_to_pos(doc.text(), edit.range.end, offset_encoding) {
Some(end) => end as i128 - primary_cursor as i128,
None => return Transaction::new(doc.text()),
};
let Some(range) = util::lsp_range_to_range(doc.text(), edit.range, offset_encoding) else{
return Transaction::new(doc.text());
};
let start_offset = range.anchor as i128 - primary_cursor as i128;
let end_offset = range.head as i128 - primary_cursor as i128;
(Some((start_offset, end_offset)), edit.new_text)
} else {