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use std::{sync::Arc};
use rustc_hash::FxHashSet;
use rayon::prelude::*;
use salsa::Database;
use crate::{
Cancelable,
db::{self, FilesDatabase, SyntaxDatabase},
imp::FileResolverImp,
symbol_index::SymbolIndex,
FileId,
};
pub(crate) trait SourceRoot {
fn contains(&self, file_id: FileId) -> bool;
fn db(&self) -> &db::RootDatabase;
fn symbols(&self, acc: &mut Vec<Arc<SymbolIndex>>) -> Cancelable<()>;
}
#[derive(Default, Debug, Clone)]
pub(crate) struct WritableSourceRoot {
db: db::RootDatabase,
}
impl WritableSourceRoot {
pub fn apply_changes(
&mut self,
changes: &mut dyn Iterator<Item = (FileId, Option<String>)>,
file_resolver: Option<FileResolverImp>,
) {
let mut changed = FxHashSet::default();
let mut removed = FxHashSet::default();
for (file_id, text) in changes {
match text {
None => {
removed.insert(file_id);
}
Some(text) => {
self.db
.query(db::FileTextQuery)
.set(file_id, Arc::new(text));
changed.insert(file_id);
}
}
}
let file_set = self.db.file_set();
let mut files: FxHashSet<FileId> = file_set.files.clone();
for file_id in removed {
files.remove(&file_id);
}
files.extend(changed);
let resolver = file_resolver.unwrap_or_else(|| file_set.resolver.clone());
self.db
.query(db::FileSetQuery)
.set((), Arc::new(db::FileSet { files, resolver }));
}
}
impl SourceRoot for WritableSourceRoot {
fn contains(&self, file_id: FileId) -> bool {
self.db.file_set().files.contains(&file_id)
}
fn db(&self) -> &db::RootDatabase {
&self.db
}
fn symbols<'a>(&'a self, acc: &mut Vec<Arc<SymbolIndex>>) -> Cancelable<()> {
for &file_id in self.db.file_set().files.iter() {
let symbols = self.db.file_symbols(file_id)?;
acc.push(symbols)
}
Ok(())
}
}
#[derive(Debug, Clone)]
pub(crate) struct ReadonlySourceRoot {
db: db::RootDatabase,
symbol_index: Arc<SymbolIndex>,
}
impl ReadonlySourceRoot {
pub(crate) fn new(
files: Vec<(FileId, String)>,
resolver: FileResolverImp,
) -> ReadonlySourceRoot {
let db = db::RootDatabase::default();
let mut file_ids = FxHashSet::default();
for (file_id, text) in files {
file_ids.insert(file_id);
db.query(db::FileTextQuery).set(file_id, Arc::new(text));
}
db.query(db::FileSetQuery)
.set((), Arc::new(db::FileSet { files: file_ids, resolver }));
let file_set = db.file_set();
let symbol_index =
SymbolIndex::for_files(file_set.files.par_iter()
.map_with(db.clone(), |db, &file_id| (file_id, db.file_syntax(file_id))));
ReadonlySourceRoot { db, symbol_index: Arc::new(symbol_index) }
}
}
impl SourceRoot for ReadonlySourceRoot {
fn contains(&self, file_id: FileId) -> bool {
self.db.file_set().files.contains(&file_id)
}
fn db(&self) -> &db::RootDatabase {
&self.db
}
fn symbols(&self, acc: &mut Vec<Arc<SymbolIndex>>) -> Cancelable<()> {
acc.push(Arc::clone(&self.symbol_index));
Ok(())
}
}
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