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use crate::{imp::FileResolverImp, FileId};
use ra_syntax::{
ast::{self, AstNode, NameOwner},
text_utils::is_subrange,
SmolStr,
};
use relative_path::RelativePathBuf;
use std::collections::BTreeMap;
#[derive(Debug, PartialEq, Eq, Hash)]
pub struct ModuleDescriptor {
pub submodules: Vec<Submodule>,
}
impl ModuleDescriptor {
pub fn new(root: ast::Root) -> ModuleDescriptor {
let submodules = modules(root).map(|(name, _)| Submodule { name }).collect();
ModuleDescriptor { submodules }
}
}
fn modules<'a>(root: ast::Root<'a>) -> impl Iterator<Item = (SmolStr, ast::Module<'a>)> {
root.modules().filter_map(|module| {
let name = module.name()?.text();
if !module.has_semi() {
return None;
}
Some((name, module))
})
}
#[derive(Clone, Hash, PartialEq, Eq, Debug)]
pub struct Submodule {
pub name: SmolStr,
}
#[derive(Debug, PartialEq, Eq, Hash)]
pub(crate) struct ModuleTreeDescriptor {
nodes: Vec<NodeData>,
links: Vec<LinkData>,
file_id2node: BTreeMap<FileId, Node>,
}
#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
struct Node(usize);
#[derive(Hash, Debug, PartialEq, Eq)]
struct NodeData {
file_id: FileId,
links: Vec<Link>,
parents: Vec<Link>,
}
#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
pub(crate) struct Link(usize);
#[derive(Hash, Debug, PartialEq, Eq)]
struct LinkData {
owner: Node,
name: SmolStr,
points_to: Vec<Node>,
problem: Option<Problem>,
}
#[derive(Clone, Debug, Hash, PartialEq, Eq)]
pub enum Problem {
UnresolvedModule {
candidate: RelativePathBuf,
},
NotDirOwner {
move_to: RelativePathBuf,
candidate: RelativePathBuf,
},
}
impl ModuleTreeDescriptor {
pub(crate) fn new<'a>(
files: impl Iterator<Item = (FileId, &'a ModuleDescriptor)> + Clone,
file_resolver: &FileResolverImp,
) -> ModuleTreeDescriptor {
let mut file_id2node = BTreeMap::new();
let mut nodes: Vec<NodeData> = files
.clone()
.enumerate()
.map(|(idx, (file_id, _))| {
file_id2node.insert(file_id, Node(idx));
NodeData {
file_id,
links: Vec::new(),
parents: Vec::new(),
}
})
.collect();
let mut links = Vec::new();
for (idx, (file_id, descr)) in files.enumerate() {
let owner = Node(idx);
for sub in descr.submodules.iter() {
let link = Link(links.len());
nodes[owner.0].links.push(link);
let (points_to, problem) = resolve_submodule(file_id, &sub.name, file_resolver);
let points_to = points_to
.into_iter()
.map(|file_id| {
let node = file_id2node[&file_id];
nodes[node.0].parents.push(link);
node
})
.collect();
links.push(LinkData {
owner,
name: sub.name.clone(),
points_to,
problem,
})
}
}
ModuleTreeDescriptor {
nodes,
links,
file_id2node,
}
}
pub(crate) fn parent_modules(&self, file_id: FileId) -> Vec<Link> {
let node = self.file_id2node[&file_id];
self.node(node).parents.clone()
}
pub(crate) fn child_module_by_name(&self, file_id: FileId, name: &str) -> Vec<FileId> {
let node = self.file_id2node[&file_id];
self.node(node)
.links
.iter()
.filter(|it| it.name(self) == name)
.flat_map(|link| {
link.points_to(self)
.iter()
.map(|&node| self.node(node).file_id)
})
.collect()
}
pub(crate) fn problems<'a, 'b>(
&'b self,
file_id: FileId,
root: ast::Root<'a>,
) -> Vec<(ast::Name<'a>, &'b Problem)> {
let node = self.file_id2node[&file_id];
self.node(node)
.links
.iter()
.filter_map(|&link| {
let problem = self.link(link).problem.as_ref()?;
let name = link.bind_source(self, root).name()?;
Some((name, problem))
})
.collect()
}
fn node(&self, node: Node) -> &NodeData {
&self.nodes[node.0]
}
fn link(&self, link: Link) -> &LinkData {
&self.links[link.0]
}
}
impl Link {
pub(crate) fn name(self, tree: &ModuleTreeDescriptor) -> SmolStr {
tree.link(self).name.clone()
}
pub(crate) fn owner(self, tree: &ModuleTreeDescriptor) -> FileId {
let owner = tree.link(self).owner;
tree.node(owner).file_id
}
fn points_to(self, tree: &ModuleTreeDescriptor) -> &[Node] {
&tree.link(self).points_to
}
pub(crate) fn bind_source<'a>(
self,
tree: &ModuleTreeDescriptor,
root: ast::Root<'a>,
) -> ast::Module<'a> {
modules(root)
.filter(|(name, _)| name == &tree.link(self).name)
.next()
.unwrap()
.1
}
}
fn resolve_submodule(
file_id: FileId,
name: &SmolStr,
file_resolver: &FileResolverImp,
) -> (Vec<FileId>, Option<Problem>) {
let mod_name = file_resolver.file_stem(file_id);
let is_dir_owner = mod_name == "mod" || mod_name == "lib" || mod_name == "main";
let file_mod = RelativePathBuf::from(format!("../{}.rs", name));
let dir_mod = RelativePathBuf::from(format!("../{}/mod.rs", name));
let points_to: Vec<FileId>;
let problem: Option<Problem>;
if is_dir_owner {
points_to = [&file_mod, &dir_mod]
.iter()
.filter_map(|path| file_resolver.resolve(file_id, path))
.collect();
problem = if points_to.is_empty() {
Some(Problem::UnresolvedModule {
candidate: file_mod,
})
} else {
None
}
} else {
points_to = Vec::new();
problem = Some(Problem::NotDirOwner {
move_to: RelativePathBuf::from(format!("../{}/mod.rs", mod_name)),
candidate: file_mod,
});
}
(points_to, problem)
}
#[derive(Debug, Clone)]
pub struct FnDescriptor {
pub name: String,
pub label: String,
pub ret_type: Option<String>,
pub params: Vec<String>,
}
impl FnDescriptor {
pub fn new_opt(node: ast::FnDef) -> Option<Self> {
let name = node.name()?.text().to_string();
// Strip the body out for the label.
let label: String = if let Some(body) = node.body() {
let body_range = body.syntax().range();
let label: String = node
.syntax()
.children()
.filter(|child| !is_subrange(body_range, child.range()))
.map(|node| node.text().to_string())
.collect();
label
} else {
node.syntax().text().to_string()
};
let params = FnDescriptor::param_list(node);
let ret_type = node.ret_type().map(|r| r.syntax().text().to_string());
Some(FnDescriptor {
name,
ret_type,
params,
label,
})
}
fn param_list(node: ast::FnDef) -> Vec<String> {
let mut res = vec![];
if let Some(param_list) = node.param_list() {
if let Some(self_param) = param_list.self_param() {
res.push(self_param.syntax().text().to_string())
}
// Maybe use param.pat here? See if we can just extract the name?
//res.extend(param_list.params().map(|p| p.syntax().text().to_string()));
res.extend(
param_list
.params()
.filter_map(|p| p.pat())
.map(|pat| pat.syntax().text().to_string()),
);
}
res
}
}
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