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|
use std::sync::Arc;
use ra_syntax::{
TextRange, SyntaxKind, AstNode,
ast::{self, ModuleItemOwner},
};
use ra_db::{FileId, SourceRootId};
use crate::{
SourceItemId, SourceFileItemId, Path, ModuleSource, HirDatabase, Name, SourceFileItems,
HirFileId, MacroCallLoc, AsName,
module_tree::ModuleId
};
/// A set of items and imports declared inside a module, without relation to
/// other modules.
///
/// This sits in-between raw syntax and name resolution and allows us to avoid
/// recomputing name res: if two instance of `InputModuleItems` are the same, we
/// can avoid redoing name resolution.
#[derive(Debug, Default, PartialEq, Eq)]
pub struct InputModuleItems {
pub(crate) items: Vec<ModuleItem>,
pub(super) imports: Vec<Import>,
}
impl InputModuleItems {
pub(crate) fn input_module_items_query(
db: &impl HirDatabase,
source_root_id: SourceRootId,
module_id: ModuleId,
) -> Arc<InputModuleItems> {
let module_tree = db.module_tree(source_root_id);
let source = module_id.source(&module_tree);
let file_id = source.file_id;
let source = ModuleSource::from_source_item_id(db, source);
let file_items = db.file_items(file_id);
let fill = |acc: &mut InputModuleItems, items: &mut Iterator<Item = ast::ItemOrMacro>| {
for item in items {
match item {
ast::ItemOrMacro::Item(it) => {
acc.add_item(file_id, &file_items, it);
}
ast::ItemOrMacro::Macro(macro_call) => {
let item_id = file_items.id_of_unchecked(macro_call.syntax());
let loc = MacroCallLoc {
source_root_id,
module_id,
source_item_id: SourceItemId {
file_id,
item_id: Some(item_id),
},
};
let id = loc.id(db);
let file_id = HirFileId::from(id);
let file_items = db.file_items(file_id);
//FIXME: expand recursively
for item in db.hir_source_file(file_id).items() {
acc.add_item(file_id, &file_items, item);
}
}
}
}
};
let mut res = InputModuleItems::default();
match source {
ModuleSource::SourceFile(it) => fill(&mut res, &mut it.items_with_macros()),
ModuleSource::Module(it) => {
if let Some(item_list) = it.item_list() {
fill(&mut res, &mut item_list.items_with_macros())
}
}
};
Arc::new(res)
}
pub(crate) fn add_item(
&mut self,
file_id: HirFileId,
file_items: &SourceFileItems,
item: &ast::ModuleItem,
) -> Option<()> {
match item.kind() {
ast::ModuleItemKind::StructDef(it) => {
self.items.push(ModuleItem::new(file_id, file_items, it)?)
}
ast::ModuleItemKind::EnumDef(it) => {
self.items.push(ModuleItem::new(file_id, file_items, it)?)
}
ast::ModuleItemKind::FnDef(it) => {
self.items.push(ModuleItem::new(file_id, file_items, it)?)
}
ast::ModuleItemKind::TraitDef(it) => {
self.items.push(ModuleItem::new(file_id, file_items, it)?)
}
ast::ModuleItemKind::TypeDef(it) => {
self.items.push(ModuleItem::new(file_id, file_items, it)?)
}
ast::ModuleItemKind::ImplBlock(_) => {
// impls don't define items
}
ast::ModuleItemKind::UseItem(it) => self.add_use_item(file_items, it),
ast::ModuleItemKind::ExternCrateItem(_) => {
// TODO
}
ast::ModuleItemKind::ConstDef(it) => {
self.items.push(ModuleItem::new(file_id, file_items, it)?)
}
ast::ModuleItemKind::StaticDef(it) => {
self.items.push(ModuleItem::new(file_id, file_items, it)?)
}
ast::ModuleItemKind::Module(it) => {
self.items.push(ModuleItem::new(file_id, file_items, it)?)
}
}
Some(())
}
fn add_use_item(&mut self, file_items: &SourceFileItems, item: &ast::UseItem) {
let file_item_id = file_items.id_of_unchecked(item.syntax());
let start_offset = item.syntax().range().start();
Path::expand_use_item(item, |path, range| {
let kind = match range {
None => ImportKind::Glob,
Some(range) => ImportKind::Named(NamedImport {
file_item_id,
relative_range: range - start_offset,
}),
};
self.imports.push(Import { kind, path })
})
}
}
#[derive(Debug, PartialEq, Eq)]
pub(super) enum Vis {
// Priv,
Other,
}
#[derive(Debug, PartialEq, Eq)]
pub(crate) struct ModuleItem {
pub(crate) id: SourceItemId,
pub(crate) name: Name,
pub(super) kind: SyntaxKind,
pub(super) vis: Vis,
}
impl ModuleItem {
fn new(
file_id: HirFileId,
file_items: &SourceFileItems,
item: &impl ast::NameOwner,
) -> Option<ModuleItem> {
let name = item.name()?.as_name();
let kind = item.syntax().kind();
let vis = Vis::Other;
let item_id = Some(file_items.id_of_unchecked(item.syntax()));
let id = SourceItemId { file_id, item_id };
let res = ModuleItem {
id,
name,
kind,
vis,
};
Some(res)
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub(super) struct Import {
pub(super) path: Path,
pub(super) kind: ImportKind,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct NamedImport {
pub file_item_id: SourceFileItemId,
pub relative_range: TextRange,
}
impl NamedImport {
// FIXME: this is only here for one use-case in completion. Seems like a
// pretty gross special case.
pub fn range(&self, db: &impl HirDatabase, file_id: FileId) -> TextRange {
let source_item_id = SourceItemId {
file_id: file_id.into(),
item_id: Some(self.file_item_id),
};
let syntax = db.file_item(source_item_id);
let offset = syntax.range().start();
self.relative_range + offset
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub(super) enum ImportKind {
Glob,
Named(NamedImport),
}
|
