rust/crates/rust-analyzer/src/diagnostics.rs

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//! Book keeping for keeping diagnostics easily in sync with the client.
pub(crate) mod to_proto;
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use std::{mem, sync::Arc};
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use ide::FileId;
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use rustc_hash::{FxHashMap, FxHashSet};
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use crate::lsp_ext;
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pub(crate) type CheckFixes = Arc<FxHashMap<FileId, Vec<Fix>>>;
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#[derive(Debug, Default, Clone)]
pub struct DiagnosticsMapConfig {
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pub remap_prefix: FxHashMap<String, String>,
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pub warnings_as_info: Vec<String>,
pub warnings_as_hint: Vec<String>,
}
#[derive(Debug, Default, Clone)]
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pub(crate) struct DiagnosticCollection {
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// FIXME: should be FxHashMap<FileId, Vec<ra_id::Diagnostic>>
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pub(crate) native: FxHashMap<FileId, Vec<lsp_types::Diagnostic>>,
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// FIXME: should be Vec<flycheck::Diagnostic>
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pub(crate) check: FxHashMap<FileId, Vec<lsp_types::Diagnostic>>,
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pub(crate) check_fixes: CheckFixes,
changes: FxHashSet<FileId>,
}
#[derive(Debug, Clone)]
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pub(crate) struct Fix {
// Fixes may be triggerable from multiple ranges.
pub(crate) ranges: Vec<lsp_types::Range>,
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pub(crate) action: lsp_ext::CodeAction,
}
impl DiagnosticCollection {
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pub(crate) fn clear_check(&mut self) {
Arc::make_mut(&mut self.check_fixes).clear();
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self.changes.extend(self.check.drain().map(|(key, _value)| key))
}
pub(crate) fn clear_native_for(&mut self, file_id: FileId) {
self.native.remove(&file_id);
self.changes.insert(file_id);
}
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pub(crate) fn add_check_diagnostic(
&mut self,
file_id: FileId,
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diagnostic: lsp_types::Diagnostic,
fix: Option<Fix>,
) {
let diagnostics = self.check.entry(file_id).or_default();
for existing_diagnostic in diagnostics.iter() {
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if are_diagnostics_equal(existing_diagnostic, &diagnostic) {
return;
}
}
let check_fixes = Arc::make_mut(&mut self.check_fixes);
check_fixes.entry(file_id).or_default().extend(fix);
diagnostics.push(diagnostic);
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self.changes.insert(file_id);
}
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pub(crate) fn set_native_diagnostics(
&mut self,
file_id: FileId,
diagnostics: Vec<lsp_types::Diagnostic>,
) {
if let Some(existing_diagnostics) = self.native.get(&file_id) {
if existing_diagnostics.len() == diagnostics.len()
&& diagnostics
.iter()
.zip(existing_diagnostics)
.all(|(new, existing)| are_diagnostics_equal(new, existing))
{
return;
}
}
self.native.insert(file_id, diagnostics);
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self.changes.insert(file_id);
}
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pub(crate) fn diagnostics_for(
&self,
file_id: FileId,
) -> impl Iterator<Item = &lsp_types::Diagnostic> {
let native = self.native.get(&file_id).into_iter().flatten();
let check = self.check.get(&file_id).into_iter().flatten();
native.chain(check)
}
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pub(crate) fn take_changes(&mut self) -> Option<FxHashSet<FileId>> {
if self.changes.is_empty() {
return None;
}
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Some(mem::take(&mut self.changes))
}
}
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fn are_diagnostics_equal(left: &lsp_types::Diagnostic, right: &lsp_types::Diagnostic) -> bool {
left.source == right.source
&& left.severity == right.severity
&& left.range == right.range
&& left.message == right.message
}