57 lines
1.5 KiB
Rust
57 lines
1.5 KiB
Rust
use hir::db::HirDatabase;
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use ra_syntax::{
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TextUnit, AstNode, SyntaxKind::COLONCOLON,
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ast,
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algo::generate,
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};
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use crate::{AssistCtx, Assist};
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pub(crate) fn split_import(ctx: AssistCtx<impl HirDatabase>) -> Option<Assist> {
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let colon_colon = ctx
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.leaf_at_offset()
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.find(|leaf| leaf.kind() == COLONCOLON)?;
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let path = colon_colon.parent().and_then(ast::Path::cast)?;
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let top_path = generate(Some(path), |it| it.parent_path()).last()?;
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let use_tree = top_path.syntax().ancestors().find_map(ast::UseTree::cast);
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if use_tree.is_none() {
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return None;
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}
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let l_curly = colon_colon.range().end();
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let r_curly = match top_path.syntax().parent().and_then(ast::UseTree::cast) {
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Some(tree) => tree.syntax().range().end(),
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None => top_path.syntax().range().end(),
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};
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ctx.build("split import", |edit| {
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edit.insert(l_curly, "{");
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edit.insert(r_curly, "}");
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edit.set_cursor(l_curly + TextUnit::of_str("{"));
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})
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::helpers::check_assist;
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#[test]
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fn test_split_import() {
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check_assist(
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split_import,
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"use crate::<|>db::RootDatabase;",
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"use crate::{<|>db::RootDatabase};",
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)
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}
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#[test]
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fn split_import_works_with_trees() {
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check_assist(
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split_import,
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"use algo:<|>:visitor::{Visitor, visit}",
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"use algo::{<|>visitor::{Visitor, visit}}",
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)
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}
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}
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