72 lines
1.8 KiB
Rust
72 lines
1.8 KiB
Rust
use std::iter::successors;
|
|
|
|
use ra_syntax::{ast, AstNode, T};
|
|
|
|
use crate::{AssistContext, AssistId, Assists};
|
|
|
|
// Assist: split_import
|
|
//
|
|
// Wraps the tail of import into braces.
|
|
//
|
|
// ```
|
|
// use std::<|>collections::HashMap;
|
|
// ```
|
|
// ->
|
|
// ```
|
|
// use std::{collections::HashMap};
|
|
// ```
|
|
pub(crate) fn split_import(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
|
|
let colon_colon = ctx.find_token_at_offset(T![::])?;
|
|
let path = ast::Path::cast(colon_colon.parent())?.qualifier()?;
|
|
let top_path = successors(Some(path.clone()), |it| it.parent_path()).last()?;
|
|
|
|
let use_tree = top_path.syntax().ancestors().find_map(ast::UseTree::cast)?;
|
|
|
|
let new_tree = use_tree.split_prefix(&path);
|
|
if new_tree == use_tree {
|
|
return None;
|
|
}
|
|
let cursor = ctx.offset();
|
|
|
|
let target = colon_colon.text_range();
|
|
acc.add(AssistId("split_import"), "Split import", target, |edit| {
|
|
edit.replace_ast(use_tree, new_tree);
|
|
edit.set_cursor(cursor);
|
|
})
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use crate::tests::{check_assist, check_assist_not_applicable, check_assist_target};
|
|
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn test_split_import() {
|
|
check_assist(
|
|
split_import,
|
|
"use crate::<|>db::RootDatabase;",
|
|
"use crate::<|>{db::RootDatabase};",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn split_import_works_with_trees() {
|
|
check_assist(
|
|
split_import,
|
|
"use crate:<|>:db::{RootDatabase, FileSymbol}",
|
|
"use crate:<|>:{db::{RootDatabase, FileSymbol}}",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn split_import_target() {
|
|
check_assist_target(split_import, "use crate::<|>db::{RootDatabase, FileSymbol}", "::");
|
|
}
|
|
|
|
#[test]
|
|
fn issue4044() {
|
|
check_assist_not_applicable(split_import, "use crate::<|>:::self;")
|
|
}
|
|
}
|