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use super::*;
#[derive(Debug)]
pub struct TypeTree {
pub namespace: &'static str,
pub types: Vec<ElementType>,
pub namespaces: BTreeMap<&'static str, TypeTree>,
}
impl TypeTree {
pub fn from_namespace(namespace: &'static str) -> Self {
Self {
namespace,
types: Vec::new(),
namespaces: BTreeMap::new(),
}
}
pub fn from_limits(reader: &'static TypeReader, limits: &TypeLimits) -> Self {
let mut root = Self::from_namespace("");
let mut set = BTreeSet::new();
for limit in limits.limits() {
match &limit.limit {
TypeLimit::All => {
for def in reader.namespace_types(&limit.namespace) {
root.insert_if(reader, &limit.namespace, &mut set, &def);
}
}
TypeLimit::Some(types) => {
for name in types {
root.insert_if(
reader,
&limit.namespace,
&mut set,
&reader.resolve_type(&limit.namespace, name),
);
}
}
}
}
root
}
fn insert_if(
&mut self,
reader: &TypeReader,
namespace: &'static str,
set: &mut BTreeSet<Row>,
t: &ElementType,
) {
if set.insert(t.row()) {
for def in t.dependencies() {
self.insert_if(reader, def.namespace(), set, &def);
}
if !namespace.is_empty() {
self.insert(namespace, 0, t);
}
}
}
fn insert(&mut self, namespace: &'static str, pos: usize, t: &ElementType) {
if let Some(next) = namespace[pos..].find('.') {
let next = pos + next;
self.namespaces
.entry(&namespace[pos..next])
.or_insert_with(|| Self::from_namespace(&namespace[..next]))
.insert(namespace, next + 1, t);
} else {
self.namespaces
.entry(&namespace[pos..])
.or_insert_with(|| Self::from_namespace(namespace))
.types
.push(t.clone());
}
}
pub fn include_method(&self, signature: &MethodSignature) -> bool {
for kind in signature.dependencies() {
if !self.includes(&kind) {
return false;
}
}
true
}
pub fn includes(&self, kind: &ElementType) -> bool {
let namespace = kind.namespace();
if namespace.is_empty() {
return true;
}
self.includes_namespace_type(namespace, kind)
}
fn includes_namespace_type(&self, namespace: &str, kind: &ElementType) -> bool {
if let Some(pos) = namespace.find('.') {
if let Some(tree) = self.namespaces.get(&namespace[..pos]) {
return tree.includes_namespace_type(&namespace[pos + 1..], kind);
}
} else if let Some(tree) = self.namespaces.get(namespace) {
return tree.types.iter().any(|t| t.row() == kind.row());
}
false
}
pub fn gen<'a>(&'a self, root: &'a Self) -> impl Iterator<Item = TokenStream> + 'a {
let gen = Gen::relative(self.namespace, root);
self.types
.iter()
.map(move |t| t.gen(&gen))
.chain(gen_namespaces(&self.namespaces, root))
}
}
fn gen_namespaces<'a>(
namespaces: &'a BTreeMap<&'static str, TypeTree>,
root: &'a TypeTree,
) -> impl Iterator<Item = TokenStream> + 'a {
namespaces.iter().map(move |(name, tree)| {
let name = to_ident(name);
let tokens = tree.gen(root);
quote! {
#[allow(unused_variables, non_upper_case_globals, non_snake_case, unused_unsafe, non_camel_case_types, dead_code, clippy::all)]
pub mod #name {
#(#tokens)*
}
}
})
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_tree() {
let reader = TypeReader::get();
let mut limits = TypeLimits::new(reader);
limits.insert(NamespaceTypes {
namespace: "Windows.Win32.FileSystem",
limit: TypeLimit::Some(vec!["FILE_ACCESS_FLAGS".to_string()]),
});
let tree = TypeTree::from_limits(reader, &limits);
assert_eq!(tree.namespace, "");
assert_eq!(tree.types.len(), 0);
assert_eq!(tree.namespaces.len(), 1);
let tree = &tree.namespaces["Windows"];
assert_eq!(tree.namespace, "Windows");
assert_eq!(tree.types.len(), 0);
assert_eq!(tree.namespaces.len(), 1);
let tree = &tree.namespaces["Win32"];
assert_eq!(tree.namespace, "Windows.Win32");
assert_eq!(tree.types.len(), 0);
assert_eq!(tree.namespaces.len(), 1);
let tree = &tree.namespaces["FileSystem"];
assert_eq!(tree.namespace, "Windows.Win32.FileSystem");
assert_eq!(tree.types.len(), 1);
assert_eq!(tree.namespaces.len(), 0);
let t = &tree.types[0];
assert_eq!(
t.gen_name(&Gen::absolute(&TypeTree::from_namespace("")))
.as_str(),
"Windows :: Win32 :: FileSystem :: FILE_ACCESS_FLAGS"
);
}
}