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-rw-r--r--helix-lsp/src/lib.rs25
1 files changed, 20 insertions, 5 deletions
diff --git a/helix-lsp/src/lib.rs b/helix-lsp/src/lib.rs
index c206ac1d..a59fa31e 100644
--- a/helix-lsp/src/lib.rs
+++ b/helix-lsp/src/lib.rs
@@ -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]