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|
use ast::edit::IndentLevel;
use ide_db::base_db::AnchoredPathBuf;
use syntax::{
ast::{self, edit::AstNodeEdit, NameOwner},
AstNode,
};
use crate::{AssistContext, AssistId, AssistKind, Assists};
// Assist: extract_module_to_file
//
// This assist extract module to file.
//
// ```
// mod foo {<|>
// fn t() {}
// }
// ```
// ->
// ```
// mod foo;
// ```
pub(crate) fn extract_module_to_file(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
let module_ast = ctx.find_node_at_offset::<ast::Module>()?;
let module_name = module_ast.name()?;
let module_def = ctx.sema.to_def(&module_ast)?;
let parent_module = module_def.parent(ctx.db())?;
let module_items = module_ast.item_list()?;
let target = module_ast.syntax().text_range();
let anchor_file_id = ctx.frange.file_id;
acc.add(
AssistId("extract_module_to_file", AssistKind::RefactorExtract),
"Extract module to file",
target,
|builder| {
let path = {
let dir = match parent_module.name(ctx.db()) {
Some(name) if !parent_module.is_mod_rs(ctx.db()) => format!("{}/", name),
_ => String::new(),
};
format!("./{}{}.rs", dir, module_name)
};
let contents = {
let items = module_items.dedent(IndentLevel(1)).to_string();
let mut items =
items.trim_start_matches('{').trim_end_matches('}').trim().to_string();
if !items.is_empty() {
items.push('\n');
}
items
};
builder.replace(target, format!("mod {};", module_name));
let dst = AnchoredPathBuf { anchor: anchor_file_id, path };
builder.create_file(dst, contents);
},
)
}
#[cfg(test)]
mod tests {
use crate::tests::check_assist;
use super::*;
#[test]
fn extract_from_root() {
check_assist(
extract_module_to_file,
r#"
mod tests {<|>
#[test] fn t() {}
}
"#,
r#"
//- /main.rs
mod tests;
//- /tests.rs
#[test] fn t() {}
"#,
);
}
#[test]
fn extract_from_submodule() {
check_assist(
extract_module_to_file,
r#"
//- /main.rs
mod submod;
//- /submod.rs
mod inner<|> {
fn f() {}
}
fn g() {}
"#,
r#"
//- /submod.rs
mod inner;
fn g() {}
//- /submod/inner.rs
fn f() {}
"#,
);
}
#[test]
fn extract_from_mod_rs() {
check_assist(
extract_module_to_file,
r#"
//- /main.rs
mod submodule;
//- /submodule/mod.rs
mod inner<|> {
fn f() {}
}
fn g() {}
"#,
r#"
//- /submodule/mod.rs
mod inner;
fn g() {}
//- /submodule/inner.rs
fn f() {}
"#,
);
}
}
|
