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use std::sync::Arc;
#[cfg(test)]
use parking_lot::Mutex;
use ra_editor::LineIndex;
use ra_syntax::{SourceFileNode, SyntaxNode};
use salsa::{self, Database};
use crate::{
db,
descriptors::{
DescriptorDatabase, FnScopesQuery, FnSyntaxQuery, ModuleTreeQuery,
SubmodulesQuery, ItemMapQuery, InputModuleItemsQuery,
},
symbol_index::SymbolIndex,
syntax_ptr::SyntaxPtr,
loc2id::{IdMaps, IdDatabase},
Cancelable, Canceled, FileId,
};
#[derive(Debug)]
pub(crate) struct RootDatabase {
#[cfg(test)]
events: Mutex<Option<Vec<salsa::Event<RootDatabase>>>>,
#[cfg(not(test))]
events: (),
runtime: salsa::Runtime<RootDatabase>,
id_maps: IdMaps,
}
impl salsa::Database for RootDatabase {
fn salsa_runtime(&self) -> &salsa::Runtime<RootDatabase> {
&self.runtime
}
#[allow(unused)]
fn salsa_event(&self, event: impl Fn() -> salsa::Event<RootDatabase>) {
#[cfg(test)]
{
let mut events = self.events.lock();
if let Some(events) = &mut *events {
events.push(event());
}
}
}
}
impl Default for RootDatabase {
fn default() -> RootDatabase {
let mut db = RootDatabase {
events: Default::default(),
runtime: salsa::Runtime::default(),
id_maps: IdMaps::default(),
};
db.query_mut(crate::input::SourceRootQuery)
.set(crate::input::WORKSPACE, Default::default());
db.query_mut(crate::input::CrateGraphQuery)
.set((), Default::default());
db.query_mut(crate::input::LibrariesQuery)
.set((), Default::default());
db
}
}
pub(crate) fn check_canceled(db: &impl salsa::Database) -> Cancelable<()> {
if db.salsa_runtime().is_current_revision_canceled() {
Err(Canceled)
} else {
Ok(())
}
}
impl salsa::ParallelDatabase for RootDatabase {
fn snapshot(&self) -> salsa::Snapshot<RootDatabase> {
salsa::Snapshot::new(RootDatabase {
events: Default::default(),
runtime: self.runtime.snapshot(self),
id_maps: self.id_maps.clone(),
})
}
}
impl IdDatabase for RootDatabase {
fn id_maps(&self) -> &IdMaps {
&self.id_maps
}
}
#[cfg(test)]
impl RootDatabase {
pub(crate) fn log(&self, f: impl FnOnce()) -> Vec<salsa::Event<RootDatabase>> {
*self.events.lock() = Some(Vec::new());
f();
let events = self.events.lock().take().unwrap();
events
}
pub(crate) fn log_executed(&self, f: impl FnOnce()) -> Vec<String> {
let events = self.log(f);
events
.into_iter()
.filter_map(|e| match e.kind {
// This pretty horrible, but `Debug` is the only way to inspect
// QueryDescriptor at the moment.
salsa::EventKind::WillExecute { descriptor } => Some(format!("{:?}", descriptor)),
_ => None,
})
.collect()
}
}
salsa::database_storage! {
pub(crate) struct RootDatabaseStorage for RootDatabase {
impl crate::input::FilesDatabase {
fn file_text() for crate::input::FileTextQuery;
fn file_source_root() for crate::input::FileSourceRootQuery;
fn source_root() for crate::input::SourceRootQuery;
fn libraries() for crate::input::LibrariesQuery;
fn library_symbols() for crate::input::LibrarySymbolsQuery;
fn crate_graph() for crate::input::CrateGraphQuery;
}
impl SyntaxDatabase {
fn file_syntax() for FileSyntaxQuery;
fn file_lines() for FileLinesQuery;
fn file_symbols() for FileSymbolsQuery;
fn resolve_syntax_ptr() for ResolveSyntaxPtrQuery;
}
impl DescriptorDatabase {
fn module_tree() for ModuleTreeQuery;
fn fn_scopes() for FnScopesQuery;
fn _input_module_items() for InputModuleItemsQuery;
fn _item_map() for ItemMapQuery;
fn _fn_syntax() for FnSyntaxQuery;
fn _submodules() for SubmodulesQuery;
}
}
}
salsa::query_group! {
pub(crate) trait SyntaxDatabase: crate::input::FilesDatabase {
fn file_syntax(file_id: FileId) -> SourceFileNode {
type FileSyntaxQuery;
}
fn file_lines(file_id: FileId) -> Arc<LineIndex> {
type FileLinesQuery;
}
fn file_symbols(file_id: FileId) -> Cancelable<Arc<SymbolIndex>> {
type FileSymbolsQuery;
}
fn resolve_syntax_ptr(ptr: SyntaxPtr) -> SyntaxNode {
type ResolveSyntaxPtrQuery;
// Don't retain syntax trees in memory
storage volatile;
use fn crate::syntax_ptr::resolve_syntax_ptr;
}
}
}
fn file_syntax(db: &impl SyntaxDatabase, file_id: FileId) -> SourceFileNode {
let text = db.file_text(file_id);
SourceFileNode::parse(&*text)
}
fn file_lines(db: &impl SyntaxDatabase, file_id: FileId) -> Arc<LineIndex> {
let text = db.file_text(file_id);
Arc::new(LineIndex::new(&*text))
}
fn file_symbols(db: &impl SyntaxDatabase, file_id: FileId) -> Cancelable<Arc<SymbolIndex>> {
db::check_canceled(db)?;
let syntax = db.file_syntax(file_id);
Ok(Arc::new(SymbolIndex::for_file(file_id, syntax)))
}
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