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