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//! Renderer for type aliases.
use hir::{AsAssocItem, HirDisplay};
use ide_db::SymbolKind;
use syntax::SmolStr;
use crate::{item::CompletionItem, render::RenderContext};
pub(crate) fn render_type_alias(
ctx: RenderContext<'_>,
type_alias: hir::TypeAlias,
) -> Option<CompletionItem> {
let _p = profile::span("render_type_alias");
render(ctx, type_alias, false)
}
pub(crate) fn render_type_alias_with_eq(
ctx: RenderContext<'_>,
type_alias: hir::TypeAlias,
) -> Option<CompletionItem> {
let _p = profile::span("render_type_alias_with_eq");
render(ctx, type_alias, true)
}
fn render(
ctx: RenderContext<'_>,
type_alias: hir::TypeAlias,
with_eq: bool,
) -> Option<CompletionItem> {
let db = ctx.db();
let name = type_alias.name(db);
let (name, escaped_name) = if with_eq {
(
SmolStr::from_iter([&name.unescaped().to_smol_str(), " = "]),
SmolStr::from_iter([&name.to_smol_str(), " = "]),
)
} else {
(name.unescaped().to_smol_str(), name.to_smol_str())
};
let detail = type_alias.display(db).to_string();
let mut item = CompletionItem::new(SymbolKind::TypeAlias, ctx.source_range(), name.clone());
item.set_documentation(ctx.docs(type_alias))
.set_deprecated(ctx.is_deprecated(type_alias) || ctx.is_deprecated_assoc_item(type_alias))
.detail(detail)
.set_relevance(ctx.completion_relevance());
if let Some(actm) = type_alias.as_assoc_item(db) {
if let Some(trt) = actm.containing_trait_or_trait_impl(db) {
item.trait_name(trt.name(db).to_smol_str());
}
}
item.insert_text(escaped_name);
Some(item.build())
}
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