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|
use std::{
collections::HashMap,
sync::Arc,
panic,
};
use once_cell::sync::OnceCell;
use rayon::prelude::*;
use ra_editor::LineIndex;
use ra_syntax::File;
use {
FileId,
imp::FileResolverImp,
symbol_index::SymbolIndex,
descriptors::{ModuleDescriptor, ModuleTreeDescriptor},
db::Db,
};
pub(crate) trait SourceRoot {
fn contains(&self, file_id: FileId) -> bool;
fn module_tree(&self) -> Arc<ModuleTreeDescriptor>;
fn lines(&self, file_id: FileId) -> Arc<LineIndex>;
fn syntax(&self, file_id: FileId) -> File;
fn symbols(&self, acc: &mut Vec<Arc<SymbolIndex>>);
}
#[derive(Default, Debug)]
pub(crate) struct WritableSourceRoot {
db: Db,
}
impl WritableSourceRoot {
pub fn apply_changes(
&self,
changes: &mut dyn Iterator<Item=(FileId, Option<String>)>,
file_resolver: Option<FileResolverImp>,
) -> WritableSourceRoot {
let resolver_changed = file_resolver.is_some();
let mut changed_files = Vec::new();
let mut new_state = self.db.state().clone();
for (file_id, text) in changes {
changed_files.push(file_id);
match text {
Some(text) => {
new_state.file_map.insert(file_id, Arc::new(text));
},
None => {
new_state.file_map.remove(&file_id);
}
}
}
if let Some(file_resolver) = file_resolver {
new_state.file_resolver = file_resolver
}
WritableSourceRoot {
db: self.db.with_changes(new_state, &changed_files, resolver_changed)
}
}
}
impl SourceRoot for WritableSourceRoot {
fn module_tree(&self) -> Arc<ModuleTreeDescriptor> {
self.db.make_query(::module_map::module_tree)
}
fn contains(&self, file_id: FileId) -> bool {
self.db.state().file_map.contains_key(&file_id)
}
fn lines(&self, file_id: FileId) -> Arc<LineIndex> {
self.db.make_query(|ctx| ::queries::file_lines(ctx, file_id))
}
fn syntax(&self, file_id: FileId) -> File {
self.db.make_query(|ctx| ::queries::file_syntax(ctx, file_id))
}
fn symbols<'a>(&'a self, acc: &mut Vec<Arc<SymbolIndex>>) {
self.db.make_query(|ctx| {
let file_set = ::queries::file_set(ctx);
let syms = file_set.0.iter()
.map(|file_id| ::queries::file_symbols(ctx, *file_id));
acc.extend(syms);
});
}
}
#[derive(Debug)]
struct FileData {
text: String,
lines: OnceCell<Arc<LineIndex>>,
syntax: OnceCell<File>,
}
impl FileData {
fn new(text: String) -> FileData {
FileData {
text,
syntax: OnceCell::new(),
lines: OnceCell::new(),
}
}
fn lines(&self) -> &Arc<LineIndex> {
self.lines.get_or_init(|| Arc::new(LineIndex::new(&self.text)))
}
fn syntax(&self) -> &File {
let text = &self.text;
let syntax = &self.syntax;
match panic::catch_unwind(panic::AssertUnwindSafe(|| syntax.get_or_init(|| File::parse(text)))) {
Ok(file) => file,
Err(err) => {
error!("Parser paniced on:\n------\n{}\n------\n", text);
panic::resume_unwind(err)
}
}
}
}
#[derive(Debug)]
pub(crate) struct ReadonlySourceRoot {
symbol_index: Arc<SymbolIndex>,
file_map: HashMap<FileId, FileData>,
module_tree: Arc<ModuleTreeDescriptor>,
}
impl ReadonlySourceRoot {
pub(crate) fn new(files: Vec<(FileId, String)>, file_resolver: FileResolverImp) -> ReadonlySourceRoot {
let modules = files.par_iter()
.map(|(file_id, text)| {
let syntax = File::parse(text);
let mod_descr = ModuleDescriptor::new(syntax.ast());
(*file_id, syntax, mod_descr)
})
.collect::<Vec<_>>();
let module_tree = ModuleTreeDescriptor::new(
modules.iter().map(|it| (it.0, &it.2)),
&file_resolver,
);
let symbol_index = SymbolIndex::for_files(
modules.par_iter().map(|it| (it.0, it.1.clone()))
);
let file_map: HashMap<FileId, FileData> = files
.into_iter()
.map(|(id, text)| (id, FileData::new(text)))
.collect();
ReadonlySourceRoot {
symbol_index: Arc::new(symbol_index),
file_map,
module_tree: Arc::new(module_tree),
}
}
fn data(&self, file_id: FileId) -> &FileData {
match self.file_map.get(&file_id) {
Some(data) => data,
None => panic!("unknown file: {:?}", file_id),
}
}
}
impl SourceRoot for ReadonlySourceRoot {
fn module_tree(&self) -> Arc<ModuleTreeDescriptor> {
Arc::clone(&self.module_tree)
}
fn contains(&self, file_id: FileId) -> bool {
self.file_map.contains_key(&file_id)
}
fn lines(&self, file_id: FileId) -> Arc<LineIndex> {
Arc::clone(self.data(file_id).lines())
}
fn syntax(&self, file_id: FileId) -> File {
self.data(file_id).syntax().clone()
}
fn symbols(&self, acc: &mut Vec<Arc<SymbolIndex>>) {
acc.push(Arc::clone(&self.symbol_index))
}
}
|
