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|
use std::sync::Arc;
use {
FileId,
db::{
Query, QueryCtx
},
module_map::resolve_submodule,
};
impl<'a> QueryCtx<'a> {
fn module_descr(&self, file_id: FileId) -> Arc<descr::ModuleDescr> {
self.get(MODULE_DESCR, file_id)
}
fn resolve_submodule(&self, file_id: FileId, submod: descr::Submodule) -> Arc<Vec<FileId>> {
self.get(RESOLVE_SUBMODULE, (file_id, submod))
}
}
pub(crate) const MODULE_DESCR: Query<FileId, descr::ModuleDescr> = Query {
id: 30,
f: |ctx, &file_id| {
let file = ctx.file_syntax(file_id);
descr::ModuleDescr::new(file.ast())
}
};
pub(crate) const RESOLVE_SUBMODULE: Query<(FileId, descr::Submodule), Vec<FileId>> = Query {
id: 31,
f: |ctx, params| {
let files = ctx.file_set();
resolve_submodule(params.0, ¶ms.1.name, &files.1).0
}
};
pub(crate) const PARENT_MODULE: Query<FileId, Vec<FileId>> = Query {
id: 40,
f: |ctx, file_id| {
let files = ctx.file_set();
let res = files.0.iter()
.map(|&parent_id| (parent_id, ctx.module_descr(parent_id)))
.filter(|(parent_id, descr)| {
descr.submodules.iter()
.any(|subm| {
ctx.resolve_submodule(*parent_id, subm.clone())
.iter()
.any(|it| it == file_id)
})
})
.map(|(id, _)| id)
.collect();
res
}
};
mod descr {
use libsyntax2::{
SmolStr,
ast::{self, NameOwner},
};
#[derive(Debug, Hash)]
pub struct ModuleDescr {
pub submodules: Vec<Submodule>
}
impl ModuleDescr {
pub fn new(root: ast::Root) -> ModuleDescr {
let submodules = root
.modules()
.filter_map(|module| {
let name = module.name()?.text();
if !module.has_semi() {
return None;
}
Some(Submodule { name })
}).collect();
ModuleDescr { submodules } }
}
#[derive(Clone, Hash, PartialEq, Eq, Debug)]
pub struct Submodule {
pub name: SmolStr,
}
}
#[cfg(test)]
mod tests {
use std::collections::HashMap;
use im;
use relative_path::{RelativePath, RelativePathBuf};
use {
db::{Query, Db, State},
imp::FileResolverImp,
FileId, FileResolver,
};
use super::*;
#[derive(Debug)]
struct FileMap(im::HashMap<FileId, RelativePathBuf>);
impl FileResolver for FileMap {
fn file_stem(&self, file_id: FileId) -> String {
self.0[&file_id].file_stem().unwrap().to_string()
}
fn resolve(&self, file_id: FileId, rel: &RelativePath) -> Option<FileId> {
let path = self.0[&file_id].join(rel).normalize();
self.0.iter()
.filter_map(|&(id, ref p)| Some(id).filter(|_| p == &path))
.next()
}
}
struct Fixture {
next_file_id: u32,
fm: im::HashMap<FileId, RelativePathBuf>,
db: Db,
}
impl Fixture {
fn new() -> Fixture {
Fixture {
next_file_id: 1,
fm: im::HashMap::new(),
db: Db::new(State::default()),
}
}
fn add_file(&mut self, path: &str, text: &str) -> FileId {
assert!(path.starts_with("/"));
let file_id = FileId(self.next_file_id);
self.next_file_id += 1;
self.fm.insert(file_id, RelativePathBuf::from(&path[1..]));
let mut new_state = self.db.state().clone();
new_state.file_map.insert(file_id, text.to_string().into_boxed_str().into());
new_state.resolver = FileResolverImp::new(
Arc::new(FileMap(self.fm.clone()))
);
self.db = self.db.with_state(new_state, &[file_id], true);
file_id
}
fn remove_file(&mut self, file_id: FileId) {
self.fm.remove(&file_id);
let mut new_state = self.db.state().clone();
new_state.file_map.remove(&file_id);
new_state.resolver = FileResolverImp::new(
Arc::new(FileMap(self.fm.clone()))
);
self.db = self.db.with_state(new_state, &[file_id], true);
}
fn change_file(&mut self, file_id: FileId, new_text: &str) {
let mut new_state = self.db.state().clone();
new_state.file_map.insert(file_id, new_text.to_string().into_boxed_str().into());
self.db = self.db.with_state(new_state, &[file_id], false);
}
fn check_parent_modules(
&self,
file_id: FileId,
expected: &[FileId],
queries: &[(u16, u64)]
) {
let (actual, events) = self.db.get(PARENT_MODULE, file_id);
assert_eq!(actual.as_slice(), expected);
let mut counts = HashMap::new();
events.into_iter()
.for_each(|event| *counts.entry(event).or_insert(0) += 1);
for &(query_id, expected_count) in queries.iter() {
let actual_count = *counts.get(&query_id).unwrap_or(&0);
assert_eq!(
actual_count,
expected_count,
"counts for {} differ",
query_id,
)
}
}
}
#[test]
fn test_parent_module() {
let mut f = Fixture::new();
let foo = f.add_file("/foo.rs", "");
f.check_parent_modules(foo, &[], &[(MODULE_DESCR.id, 1)]);
let lib = f.add_file("/lib.rs", "mod foo;");
f.check_parent_modules(foo, &[lib], &[(MODULE_DESCR.id, 1)]);
f.check_parent_modules(foo, &[lib], &[(MODULE_DESCR.id, 0)]);
f.change_file(lib, "");
f.check_parent_modules(foo, &[], &[(MODULE_DESCR.id, 1)]);
f.change_file(lib, "mod foo;");
f.check_parent_modules(foo, &[lib], &[(MODULE_DESCR.id, 1)]);
f.change_file(lib, "mod bar;");
f.check_parent_modules(foo, &[], &[(MODULE_DESCR.id, 1)]);
f.change_file(lib, "mod foo;");
f.check_parent_modules(foo, &[lib], &[(MODULE_DESCR.id, 1)]);
f.remove_file(lib);
f.check_parent_modules(foo, &[], &[(MODULE_DESCR.id, 0)]);
}
}
|
