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//! This module contains utilities for turning SyntaxNodes and HIR types
//! into types that may be used to render in a UI.
mod function_signature;
mod navigation_target;
mod structure;
use crate::db::RootDatabase;
use ra_syntax::{ast::{self, AstNode, TypeParamsOwner}, SyntaxKind::{ATTR, COMMENT}};
pub use navigation_target::NavigationTarget;
pub use structure::{StructureNode, file_structure};
pub use function_signature::FunctionSignature;
pub(crate) fn function_label(node: &ast::FnDef) -> String {
FunctionSignature::from(node).to_string()
}
pub(crate) fn const_label(node: &ast::ConstDef) -> String {
let label: String = node
.syntax()
.children_with_tokens()
.filter(|child| !(child.kind() == COMMENT || child.kind() == ATTR))
.map(|node| node.to_string())
.collect();
label.trim().to_owned()
}
pub(crate) fn type_label(node: &ast::TypeAliasDef) -> String {
let label: String = node
.syntax()
.children_with_tokens()
.filter(|child| !(child.kind() == COMMENT || child.kind() == ATTR))
.map(|node| node.to_string())
.collect();
label.trim().to_owned()
}
pub(crate) fn generic_parameters<N: TypeParamsOwner>(node: &N) -> Vec<String> {
let mut res = vec![];
if let Some(type_params) = node.type_param_list() {
res.extend(type_params.lifetime_params().map(|p| p.syntax().text().to_string()));
res.extend(type_params.type_params().map(|p| p.syntax().text().to_string()));
}
res
}
pub(crate) fn where_predicates<N: TypeParamsOwner>(node: &N) -> Vec<String> {
let mut res = vec![];
if let Some(clause) = node.where_clause() {
res.extend(clause.predicates().map(|p| p.syntax().text().to_string()));
}
res
}
pub(crate) fn rust_code_markup<CODE: AsRef<str>>(val: CODE) -> String {
rust_code_markup_with_doc::<_, &str>(val, None)
}
pub(crate) fn rust_code_markup_with_doc<CODE, DOC>(val: CODE, doc: Option<DOC>) -> String
where
CODE: AsRef<str>,
DOC: AsRef<str>,
{
if let Some(doc) = doc {
format!("```rust\n{}\n```\n\n{}", val.as_ref(), doc.as_ref())
} else {
format!("```rust\n{}\n```", val.as_ref())
}
}
// FIXME: this should not really use navigation target. Rather, approximately
// resolved symbol should return a `DefId`.
pub(crate) fn doc_text_for(db: &RootDatabase, nav: NavigationTarget) -> Option<String> {
match (nav.description(db), nav.docs(db)) {
(Some(desc), docs) => Some(rust_code_markup_with_doc(desc, docs)),
(None, Some(docs)) => Some(docs),
_ => None,
}
}
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