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|
//! This modules takes care of rendering various defenitions as completion items.
use join_to_string::join;
use test_utils::tested_by;
use hir::{Docs, PerNs, Resolution, HirDisplay, HasSource};
use ra_syntax::ast::NameOwner;
use crate::completion::{
Completions, CompletionKind, CompletionItemKind, CompletionContext, CompletionItem,
};
use crate::display::{
function_label, const_label, type_label,
};
impl Completions {
pub(crate) fn add_field(
&mut self,
ctx: &CompletionContext,
field: hir::StructField,
substs: &hir::Substs,
) {
CompletionItem::new(
CompletionKind::Reference,
ctx.source_range(),
field.name(ctx.db).to_string(),
)
.kind(CompletionItemKind::Field)
.detail(field.ty(ctx.db).subst(substs).display(ctx.db).to_string())
.set_documentation(field.docs(ctx.db))
.add_to(self);
}
pub(crate) fn add_pos_field(&mut self, ctx: &CompletionContext, field: usize, ty: &hir::Ty) {
CompletionItem::new(CompletionKind::Reference, ctx.source_range(), field.to_string())
.kind(CompletionItemKind::Field)
.detail(ty.display(ctx.db).to_string())
.add_to(self);
}
pub(crate) fn add_resolution(
&mut self,
ctx: &CompletionContext,
local_name: String,
resolution: &PerNs<Resolution>,
) {
use hir::ModuleDef::*;
let def = resolution.as_ref().take_types().or_else(|| resolution.as_ref().take_values());
let def = match def {
None => {
self.add(CompletionItem::new(
CompletionKind::Reference,
ctx.source_range(),
local_name,
));
return;
}
Some(it) => it,
};
let mut completion_kind = CompletionKind::Reference;
let (kind, docs) = match def {
Resolution::Def(Module(it)) => (CompletionItemKind::Module, it.docs(ctx.db)),
Resolution::Def(Function(func)) => {
return self.add_function_with_name(ctx, Some(local_name), *func);
}
Resolution::Def(Struct(it)) => (CompletionItemKind::Struct, it.docs(ctx.db)),
Resolution::Def(Union(it)) => (CompletionItemKind::Struct, it.docs(ctx.db)),
Resolution::Def(Enum(it)) => (CompletionItemKind::Enum, it.docs(ctx.db)),
Resolution::Def(EnumVariant(it)) => (CompletionItemKind::EnumVariant, it.docs(ctx.db)),
Resolution::Def(Const(it)) => (CompletionItemKind::Const, it.docs(ctx.db)),
Resolution::Def(Static(it)) => (CompletionItemKind::Static, it.docs(ctx.db)),
Resolution::Def(Trait(it)) => (CompletionItemKind::Trait, it.docs(ctx.db)),
Resolution::Def(TypeAlias(it)) => (CompletionItemKind::TypeAlias, it.docs(ctx.db)),
Resolution::Def(BuiltinType(..)) => {
completion_kind = CompletionKind::BuiltinType;
(CompletionItemKind::BuiltinType, None)
}
Resolution::GenericParam(..) => (CompletionItemKind::TypeParam, None),
Resolution::LocalBinding(..) => (CompletionItemKind::Binding, None),
Resolution::SelfType(..) => (
CompletionItemKind::TypeParam, // (does this need its own kind?)
None,
),
};
CompletionItem::new(completion_kind, ctx.source_range(), local_name)
.kind(kind)
.set_documentation(docs)
.add_to(self)
}
pub(crate) fn add_function(&mut self, ctx: &CompletionContext, func: hir::Function) {
self.add_function_with_name(ctx, None, func)
}
fn add_function_with_name(
&mut self,
ctx: &CompletionContext,
name: Option<String>,
func: hir::Function,
) {
let sig = func.signature(ctx.db);
let name = name.unwrap_or_else(|| sig.name().to_string());
let ast_node = func.source(ctx.db).ast;
let detail = function_label(&ast_node);
let mut builder = CompletionItem::new(CompletionKind::Reference, ctx.source_range(), name)
.kind(if sig.has_self_param() {
CompletionItemKind::Method
} else {
CompletionItemKind::Function
})
.set_documentation(func.docs(ctx.db))
.detail(detail);
// If not an import, add parenthesis automatically.
if ctx.use_item_syntax.is_none() && !ctx.is_call {
tested_by!(inserts_parens_for_function_calls);
let snippet =
if sig.params().is_empty() || sig.has_self_param() && sig.params().len() == 1 {
format!("{}()$0", sig.name())
} else {
format!("{}($0)", sig.name())
};
builder = builder.insert_snippet(snippet);
}
self.add(builder)
}
pub(crate) fn add_const(&mut self, ctx: &CompletionContext, constant: hir::Const) {
let ast_node = constant.source(ctx.db).ast;
let name = match ast_node.name() {
Some(name) => name,
_ => return,
};
let detail = const_label(&ast_node);
CompletionItem::new(CompletionKind::Reference, ctx.source_range(), name.text().to_string())
.kind(CompletionItemKind::Const)
.set_documentation(constant.docs(ctx.db))
.detail(detail)
.add_to(self);
}
pub(crate) fn add_type_alias(&mut self, ctx: &CompletionContext, type_alias: hir::TypeAlias) {
let type_def = type_alias.source(ctx.db).ast;
let name = match type_def.name() {
Some(name) => name,
_ => return,
};
let detail = type_label(&type_def);
CompletionItem::new(CompletionKind::Reference, ctx.source_range(), name.text().to_string())
.kind(CompletionItemKind::TypeAlias)
.set_documentation(type_alias.docs(ctx.db))
.detail(detail)
.add_to(self);
}
pub(crate) fn add_enum_variant(&mut self, ctx: &CompletionContext, variant: hir::EnumVariant) {
let name = match variant.name(ctx.db) {
Some(it) => it,
None => return,
};
let detail_types = variant.fields(ctx.db).into_iter().map(|field| field.ty(ctx.db));
let detail = join(detail_types.map(|t| t.display(ctx.db).to_string()))
.separator(", ")
.surround_with("(", ")")
.to_string();
CompletionItem::new(CompletionKind::Reference, ctx.source_range(), name.to_string())
.kind(CompletionItemKind::EnumVariant)
.set_documentation(variant.docs(ctx.db))
.detail(detail)
.add_to(self);
}
}
#[cfg(test)]
mod tests {
use test_utils::covers;
use crate::completion::{CompletionKind, check_completion};
fn check_reference_completion(code: &str, expected_completions: &str) {
check_completion(code, expected_completions, CompletionKind::Reference);
}
#[test]
fn inserts_parens_for_function_calls() {
covers!(inserts_parens_for_function_calls);
check_reference_completion(
"inserts_parens_for_function_calls1",
r"
fn no_args() {}
fn main() { no_<|> }
",
);
check_reference_completion(
"inserts_parens_for_function_calls2",
r"
fn with_args(x: i32, y: String) {}
fn main() { with_<|> }
",
);
check_reference_completion(
"inserts_parens_for_function_calls3",
r"
struct S {}
impl S {
fn foo(&self) {}
}
fn bar(s: &S) {
s.f<|>
}
",
)
}
#[test]
fn dont_render_function_parens_in_use_item() {
check_reference_completion(
"dont_render_function_parens_in_use_item",
"
//- /lib.rs
mod m { pub fn foo() {} }
use crate::m::f<|>;
",
)
}
#[test]
fn dont_render_function_parens_if_already_call() {
check_reference_completion(
"dont_render_function_parens_if_already_call",
"
//- /lib.rs
fn frobnicate() {}
fn main() {
frob<|>();
}
",
);
check_reference_completion(
"dont_render_function_parens_if_already_call_assoc_fn",
"
//- /lib.rs
struct Foo {}
impl Foo { fn new() -> Foo {} }
fn main() {
Foo::ne<|>();
}
",
)
}
}
|
