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//! Renderer for `const` fields.
use hir::HasSource;
use syntax::{
ast::{Const, NameOwner},
display::const_label,
};
use crate::{
item::{CompletionItem, CompletionItemKind, CompletionKind},
render::RenderContext,
};
pub(crate) fn render_const<'a>(
ctx: RenderContext<'a>,
const_: hir::Const,
) -> Option<CompletionItem> {
ConstRender::new(ctx, const_).render()
}
#[derive(Debug)]
struct ConstRender<'a> {
ctx: RenderContext<'a>,
const_: hir::Const,
ast_node: Const,
}
impl<'a> ConstRender<'a> {
fn new(ctx: RenderContext<'a>, const_: hir::Const) -> ConstRender<'a> {
let ast_node = const_.source(ctx.db()).value;
ConstRender { ctx, const_, 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::Const)
.set_documentation(self.ctx.docs(self.const_))
.set_deprecated(self.ctx.is_deprecated(self.const_))
.detail(detail)
.build();
Some(item)
}
fn name(&self) -> Option<String> {
self.ast_node.name().map(|name| name.text().to_string())
}
fn detail(&self) -> String {
const_label(&self.ast_node)
}
}
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