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|
//! TODO kb move this into the complete_unqualified_path when starts to work properly
use assists::utils::{insert_use, mod_path_to_ast, ImportScope};
use either::Either;
use hir::{db::HirDatabase, MacroDef, ModuleDef, Query};
use itertools::Itertools;
use syntax::{algo, AstNode};
use text_edit::TextEdit;
use crate::{context::CompletionContext, item::CompletionKind, CompletionItem, CompletionItemKind};
use super::Completions;
// TODO kb when typing, completes partial results, need to rerun manually to see the proper ones
pub(crate) fn complete_magic(acc: &mut Completions, ctx: &CompletionContext) -> Option<()> {
if !(ctx.is_trivial_path || ctx.is_pat_binding_or_const) {
return None;
}
let current_module = ctx.scope.module()?;
let anchor = ctx.name_ref_syntax.as_ref()?;
let import_scope = ImportScope::find_insert_use_container(anchor.syntax(), &ctx.sema)?;
// TODO kb consider heuristics, such as "don't show `hash_map` import if `HashMap` is the import for completion"
// also apply completion ordering
let potential_import_name = ctx.token.to_string();
let possible_imports = ctx
.krate?
// TODO kb use imports_locator instead?
.query_external_importables(ctx.db, Query::new(&potential_import_name).limit(40))
.unique()
.filter_map(|import_candidate| {
let use_path = match import_candidate {
Either::Left(module_def) => current_module.find_use_path(ctx.db, module_def),
Either::Right(macro_def) => current_module.find_use_path(ctx.db, macro_def),
}?;
// TODO kb need to omit braces when there are some already.
// maybe remove braces completely?
Some((use_path, additional_completion(ctx.db, import_candidate)))
})
.filter_map(|(mod_path, additional_completion)| {
let mut builder = TextEdit::builder();
let correct_qualifier = format!(
"{}{}",
mod_path.segments.last()?,
additional_completion.unwrap_or_default()
);
builder.replace(anchor.syntax().text_range(), correct_qualifier);
let rewriter = insert_use(&import_scope, mod_path_to_ast(&mod_path), ctx.config.merge);
let old_ast = rewriter.rewrite_root()?;
algo::diff(&old_ast, &rewriter.rewrite(&old_ast)).into_text_edit(&mut builder);
let completion_item: CompletionItem = CompletionItem::new(
CompletionKind::Magic,
ctx.source_range(),
mod_path.to_string(),
)
.kind(CompletionItemKind::Struct)
.text_edit(builder.finish())
.into();
Some(completion_item)
});
acc.add_all(possible_imports);
Some(())
}
fn additional_completion(
db: &dyn HirDatabase,
import_candidate: Either<ModuleDef, MacroDef>,
) -> Option<String> {
match import_candidate {
Either::Left(ModuleDef::Function(_)) => Some("()".to_string()),
Either::Right(macro_def) => {
let (left_brace, right_brace) =
crate::render::macro_::guess_macro_braces(db, macro_def);
Some(format!("!{}{}", left_brace, right_brace))
}
_ => None,
}
}
#[cfg(test)]
mod tests {
use crate::test_utils::check_edit;
#[test]
fn function_magic_completion() {
check_edit(
"dep::io::stdin",
r#"
//- /lib.rs crate:dep
pub mod io {
pub fn stdin() {}
};
//- /main.rs crate:main deps:dep
fn main() {
stdi<|>
}
"#,
r#"
use dep::io::stdin;
fn main() {
stdin()
}
"#,
);
}
#[test]
fn macro_magic_completion() {
check_edit(
"dep::macro_with_curlies",
r#"
//- /lib.rs crate:dep
/// Please call me as macro_with_curlies! {}
#[macro_export]
macro_rules! macro_with_curlies {
() => {}
}
//- /main.rs crate:main deps:dep
fn main() {
curli<|>
}
"#,
r#"
use dep::macro_with_curlies;
fn main() {
macro_with_curlies! {}
}
"#,
);
}
#[test]
fn case_insensitive_magic_completion_works() {
check_edit(
"dep::some_module::ThirdStruct",
r#"
//- /lib.rs crate:dep
pub struct FirstStruct;
pub mod some_module {
pub struct SecondStruct;
pub struct ThirdStruct;
}
//- /main.rs crate:main deps:dep
use dep::{FirstStruct, some_module::SecondStruct};
fn main() {
this<|>
}
"#,
r#"
use dep::{FirstStruct, some_module::{SecondStruct, ThirdStruct}};
fn main() {
ThirdStruct
}
"#,
);
}
}
|
