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|
//! Renderer for type aliases.
use hir::HasSource;
use syntax::{
ast::{NameOwner, TypeAlias},
display::type_label,
};
use crate::{
item::{CompletionItem, CompletionItemKind, 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) -> TypeAliasRender<'a> {
let ast_node = type_alias.source_old(ctx.db()).value;
TypeAliasRender { ctx, type_alias, ast_node }
}
fn render(self) -> Option<CompletionItem> {
let name = self.name()?;
let detail = self.detail();
let item = CompletionItem::new(CompletionKind::Reference, self.ctx.source_range(), name)
.kind(CompletionItemKind::TypeAlias)
.set_documentation(self.ctx.docs(self.type_alias))
.set_deprecated(self.ctx.is_deprecated(self.type_alias))
.detail(detail)
.build();
Some(item)
}
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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