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//! Renderer for type aliases.
use hir::HasSource;
use ide_db::SymbolKind;
use syntax::{
ast::{NameOwner, TypeAlias},
display::type_label,
};
use crate::{
item::{CompletionItem, CompletionKind},
render::RenderContext,
};
pub(crate) fn render_type_alias<'a>(
ctx: RenderContext<'a>,
type_alias: hir::TypeAlias,
) -> Option<CompletionItem> {
TypeAliasRender::new(ctx, type_alias)?.render()
}
#[derive(Debug)]
struct TypeAliasRender<'a> {
ctx: RenderContext<'a>,
type_alias: hir::TypeAlias,
ast_node: TypeAlias,
}
impl<'a> TypeAliasRender<'a> {
fn new(ctx: RenderContext<'a>, type_alias: hir::TypeAlias) -> Option<TypeAliasRender<'a>> {
let ast_node = type_alias.source(ctx.db())?.value;
Some(TypeAliasRender { ctx, type_alias, ast_node })
}
fn render(self) -> Option<CompletionItem> {
let name = self.name()?;
let detail = self.detail();
let mut item =
CompletionItem::new(CompletionKind::Reference, self.ctx.source_range(), name);
item.kind(SymbolKind::TypeAlias)
.set_documentation(self.ctx.docs(self.type_alias))
.set_deprecated(
self.ctx.is_deprecated(self.type_alias)
|| self.ctx.is_deprecated_assoc_item(self.type_alias),
)
.detail(detail);
Some(item.build())
}
fn name(&self) -> Option<String> {
self.ast_node.name().map(|name| name.text().to_string())
}
fn detail(&self) -> String {
type_label(&self.ast_node)
}
}
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