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|
use std::{
sync::{
Arc,
atomic::{AtomicBool, Ordering::SeqCst},
},
fmt,
collections::{HashSet, VecDeque},
};
use libeditor::{self, FileSymbol, LineIndex, find_node_at_offset, LocalEdit};
use libsyntax2::{
TextUnit, TextRange, SmolStr, File, AstNode,
SyntaxKind::*,
ast::{self, NameOwner},
};
use {
FileId, FileResolver, Query, Diagnostic, SourceChange, SourceFileEdit, Position, FileSystemEdit,
JobToken, CrateGraph, CrateId,
module_map::{ModuleMap, Problem},
roots::{SourceRoot, ReadonlySourceRoot, WritableSourceRoot},
};
#[derive(Debug)]
pub(crate) struct AnalysisHostImpl {
data: Arc<WorldData>
}
impl AnalysisHostImpl {
pub fn new() -> AnalysisHostImpl {
AnalysisHostImpl {
data: Arc::new(WorldData::default()),
}
}
pub fn analysis(
&self,
file_resolver: Arc<dyn FileResolver>,
) -> AnalysisImpl {
AnalysisImpl {
needs_reindex: AtomicBool::new(false),
file_resolver,
data: self.data.clone(),
}
}
pub fn change_files(&mut self, changes: &mut dyn Iterator<Item=(FileId, Option<String>)>) {
let data = self.data_mut();
for (file_id, text) in changes {
data.root.update(file_id, text);
}
}
pub fn set_crate_graph(&mut self, graph: CrateGraph) {
let mut visited = HashSet::new();
for &file_id in graph.crate_roots.values() {
if !visited.insert(file_id) {
panic!("duplicate crate root: {:?}", file_id);
}
}
self.data_mut().crate_graph = graph;
}
pub fn set_libraries(&mut self, libs: impl Iterator<Item=impl Iterator<Item=(FileId, String)>>) {
let libs = libs.map(ReadonlySourceRoot::new).collect::<Vec<_>>();
self.data_mut().libs = Arc::new(libs);
}
fn data_mut(&mut self) -> &mut WorldData {
Arc::make_mut(&mut self.data)
}
}
pub(crate) struct AnalysisImpl {
needs_reindex: AtomicBool,
file_resolver: Arc<dyn FileResolver>,
data: Arc<WorldData>,
}
impl fmt::Debug for AnalysisImpl {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
(&*self.data).fmt(f)
}
}
impl Clone for AnalysisImpl {
fn clone(&self) -> AnalysisImpl {
AnalysisImpl {
needs_reindex: AtomicBool::new(self.needs_reindex.load(SeqCst)),
file_resolver: Arc::clone(&self.file_resolver),
data: Arc::clone(&self.data),
}
}
}
impl AnalysisImpl {
fn root(&self, file_id: FileId) -> &SourceRoot {
if self.data.root.contains(file_id) {
return &self.data.root;
}
self.data.libs.iter().find(|it| it.contains(file_id)).unwrap()
}
pub fn file_syntax(&self, file_id: FileId) -> &File {
self.root(file_id).syntax(file_id)
}
pub fn file_line_index(&self, file_id: FileId) -> &LineIndex {
self.root(file_id).lines(file_id)
}
pub fn world_symbols(&self, query: Query, token: &JobToken) -> Vec<(FileId, FileSymbol)> {
self.reindex();
let mut buf = Vec::new();
if query.libs {
self.data.libs.iter()
.for_each(|it| it.symbols(&mut buf));
} else {
self.data.root.symbols(&mut buf);
}
query.search(&buf, token)
}
pub fn parent_module(&self, file_id: FileId) -> Vec<(FileId, FileSymbol)> {
let module_map = self.root(file_id).module_map();
let id = module_map.file2module(file_id);
module_map
.parent_modules(
id,
&*self.file_resolver,
&|file_id| self.file_syntax(file_id),
)
.into_iter()
.map(|(id, name, node)| {
let id = module_map.module2file(id);
let sym = FileSymbol {
name,
node_range: node.range(),
kind: MODULE,
};
(id, sym)
})
.collect()
}
pub fn crate_for(&self, file_id: FileId) -> Vec<CrateId> {
let module_map = self.root(file_id).module_map();
let crate_graph = &self.data.crate_graph;
let mut res = Vec::new();
let mut work = VecDeque::new();
work.push_back(file_id);
let mut visited = HashSet::new();
while let Some(id) = work.pop_front() {
if let Some(crate_id) = crate_graph.crate_id_for_crate_root(id) {
res.push(crate_id);
continue;
}
let mid = module_map.file2module(id);
let parents = module_map
.parent_module_ids(
mid,
&*self.file_resolver,
&|file_id| self.file_syntax(file_id),
)
.into_iter()
.map(|id| module_map.module2file(id))
.filter(|&id| visited.insert(id));
work.extend(parents);
}
res
}
pub fn crate_root(&self, crate_id: CrateId) -> FileId {
self.data.crate_graph.crate_roots[&crate_id]
}
pub fn approximately_resolve_symbol(
&self,
file_id: FileId,
offset: TextUnit,
token: &JobToken,
) -> Vec<(FileId, FileSymbol)> {
let root = self.root(file_id);
let module_map = root.module_map();
let file = root.syntax(file_id);
let syntax = file.syntax();
if let Some(name_ref) = find_node_at_offset::<ast::NameRef>(syntax, offset) {
return self.index_resolve(name_ref, token);
}
if let Some(name) = find_node_at_offset::<ast::Name>(syntax, offset) {
if let Some(module) = name.syntax().parent().and_then(ast::Module::cast) {
if module.has_semi() {
let file_ids = self.resolve_module(module_map, file_id, module);
let res = file_ids.into_iter().map(|id| {
let name = module.name()
.map(|n| n.text())
.unwrap_or_else(|| SmolStr::new(""));
let symbol = FileSymbol {
name,
node_range: TextRange::offset_len(0.into(), 0.into()),
kind: MODULE,
};
(id, symbol)
}).collect();
return res;
}
}
}
vec![]
}
pub fn diagnostics(&self, file_id: FileId) -> Vec<Diagnostic> {
let root = self.root(file_id);
let module_map = root.module_map();
let syntax = root.syntax(file_id);
let mut res = libeditor::diagnostics(&syntax)
.into_iter()
.map(|d| Diagnostic { range: d.range, message: d.msg, fix: None })
.collect::<Vec<_>>();
module_map.problems(
file_id,
&*self.file_resolver,
&|file_id| self.file_syntax(file_id),
|name_node, problem| {
let diag = match problem {
Problem::UnresolvedModule { candidate } => {
let create_file = FileSystemEdit::CreateFile {
anchor: file_id,
path: candidate.clone(),
};
let fix = SourceChange {
label: "create module".to_string(),
source_file_edits: Vec::new(),
file_system_edits: vec![create_file],
cursor_position: None,
};
Diagnostic {
range: name_node.syntax().range(),
message: "unresolved module".to_string(),
fix: Some(fix),
}
}
Problem::NotDirOwner { move_to, candidate } => {
let move_file = FileSystemEdit::MoveFile { file: file_id, path: move_to.clone() };
let create_file = FileSystemEdit::CreateFile { anchor: file_id, path: move_to.join(candidate) };
let fix = SourceChange {
label: "move file and create module".to_string(),
source_file_edits: Vec::new(),
file_system_edits: vec![move_file, create_file],
cursor_position: None,
};
Diagnostic {
range: name_node.syntax().range(),
message: "can't declare module at this location".to_string(),
fix: Some(fix),
}
}
};
res.push(diag)
}
);
res
}
pub fn assists(&self, file_id: FileId, offset: TextUnit) -> Vec<SourceChange> {
let file = self.file_syntax(file_id);
let actions = vec![
("flip comma", libeditor::flip_comma(&file, offset).map(|f| f())),
("add `#[derive]`", libeditor::add_derive(&file, offset).map(|f| f())),
("add impl", libeditor::add_impl(&file, offset).map(|f| f())),
];
actions.into_iter()
.filter_map(|(name, local_edit)| {
Some(SourceChange::from_local_edit(
file_id, name, local_edit?,
))
})
.collect()
}
fn index_resolve(&self, name_ref: ast::NameRef, token: &JobToken) -> Vec<(FileId, FileSymbol)> {
let name = name_ref.text();
let mut query = Query::new(name.to_string());
query.exact();
query.limit(4);
self.world_symbols(query, token)
}
fn resolve_module(&self, module_map: &ModuleMap, file_id: FileId, module: ast::Module) -> Vec<FileId> {
let name = match module.name() {
Some(name) => name.text(),
None => return Vec::new(),
};
let id = module_map.file2module(file_id);
module_map
.child_module_by_name(
id, name.as_str(),
&*self.file_resolver,
&|file_id| self.file_syntax(file_id),
)
.into_iter()
.map(|id| module_map.module2file(id))
.collect()
}
fn reindex(&self) {
if self.needs_reindex.compare_and_swap(true, false, SeqCst) {
self.data.root.reindex();
}
}
}
#[derive(Clone, Default, Debug)]
struct WorldData {
crate_graph: CrateGraph,
root: WritableSourceRoot,
libs: Arc<Vec<ReadonlySourceRoot>>,
}
impl SourceChange {
pub(crate) fn from_local_edit(file_id: FileId, label: &str, edit: LocalEdit) -> SourceChange {
let file_edit = SourceFileEdit {
file_id,
edits: edit.edit.into_atoms(),
};
SourceChange {
label: label.to_string(),
source_file_edits: vec![file_edit],
file_system_edits: vec![],
cursor_position: edit.cursor_position
.map(|offset| Position { offset, file_id })
}
}
}
impl CrateGraph {
fn crate_id_for_crate_root(&self, file_id: FileId) -> Option<CrateId> {
let (&crate_id, _) = self.crate_roots
.iter()
.find(|(_crate_id, &root_id)| root_id == file_id)?;
Some(crate_id)
}
}
|