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//! Renderer for `union` literals.
use hir::{HirDisplay, Name, StructKind};
use ide_db::SymbolKind;
use itertools::Itertools;
use crate::{
render::{
variant::{format_literal_label, visible_fields},
RenderContext,
},
CompletionItem, CompletionItemKind,
};
pub(crate) fn render_union_literal(
ctx: RenderContext<'_>,
un: hir::Union,
path: Option<hir::ModPath>,
local_name: Option<Name>,
) -> Option<CompletionItem> {
let name = local_name.unwrap_or_else(|| un.name(ctx.db()));
let (qualified_name, escaped_qualified_name) = match path {
Some(p) => (p.to_string(), p.escaped().to_string()),
None => (name.to_string(), name.escaped().to_string()),
};
let mut item = CompletionItem::new(
CompletionItemKind::SymbolKind(SymbolKind::Union),
ctx.source_range(),
format_literal_label(&name.to_smol_str(), StructKind::Record),
);
let fields = un.fields(ctx.db());
let (fields, fields_omitted) = visible_fields(ctx.completion, &fields, un)?;
if fields.is_empty() {
return None;
}
let literal = if ctx.snippet_cap().is_some() {
format!(
"{} {{ ${{1|{}|}}: ${{2:()}} }}$0",
escaped_qualified_name,
fields.iter().map(|field| field.name(ctx.db()).escaped().to_smol_str()).format(",")
)
} else {
format!(
"{} {{ {} }}",
escaped_qualified_name,
fields.iter().format_with(", ", |field, f| {
f(&format_args!("{}: ()", field.name(ctx.db()).escaped()))
})
)
};
let detail = format!(
"{} {{ {}{} }}",
qualified_name,
fields.iter().format_with(", ", |field, f| {
f(&format_args!("{}: {}", field.name(ctx.db()), field.ty(ctx.db()).display(ctx.db())))
}),
if fields_omitted { ", .." } else { "" }
);
item.set_documentation(ctx.docs(un))
.set_deprecated(ctx.is_deprecated(un))
.detail(&detail)
.set_relevance(ctx.completion_relevance());
match ctx.snippet_cap() {
Some(snippet_cap) => item.insert_snippet(snippet_cap, literal),
None => item.insert_text(literal),
};
Some(item.build())
}
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