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|
use ast::edit::IndentLevel;
use ide_db::base_db::{AnchoredPathBuf, SourceDatabaseExt};
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 assist_id = AssistId("extract_module_to_file", AssistKind::RefactorExtract);
let assist_label = "Extract module to file";
let db = ctx.db();
let module_ast = ctx.find_node_at_offset::<ast::Module>()?;
let module_items = module_ast.item_list()?;
let dedent_module_items_text = module_items.dedent(IndentLevel(1)).to_string();
let module_name = module_ast.name()?;
let target = module_ast.syntax().text_range();
let anchor_file_id = ctx.frange.file_id;
let sr = db.file_source_root(anchor_file_id);
let sr = db.source_root(sr);
let file_path = sr.path_for_file(&anchor_file_id)?;
let (file_name, file_ext) = file_path.name_and_extension()?;
acc.add(assist_id, assist_label, target, |builder| {
builder.replace(target, format!("mod {};", module_name));
let path = if is_main_or_lib(file_name) {
format!("./{}.{}", module_name, file_ext.unwrap())
} else {
format!("./{}/{}.{}", file_name, module_name, file_ext.unwrap())
};
let dst = AnchoredPathBuf { anchor: anchor_file_id, path };
let contents = update_module_items_string(dedent_module_items_text);
builder.create_file(dst, contents);
})
}
fn is_main_or_lib(file_name: &str) -> bool {
file_name == "main".to_string() || file_name == "lib".to_string()
}
fn update_module_items_string(items_str: String) -> String {
let mut items_string_lines: Vec<&str> = items_str.lines().collect();
items_string_lines.pop(); // Delete last line
items_string_lines.reverse();
items_string_lines.pop(); // Delete first line
items_string_lines.reverse();
let string = items_string_lines.join("\n");
format!("{}", string)
}
#[cfg(test)]
mod tests {
use crate::tests::check_assist;
use super::*;
#[test]
fn extract_module_to_file_with_basic_module() {
check_assist(
extract_module_to_file,
r#"
//- /foo.rs crate:foo
mod tests {<|>
#[test] fn t() {}
}
"#,
r#"
//- /foo.rs
mod tests;
//- /foo/tests.rs
#[test] fn t() {}"#,
)
}
#[test]
fn extract_module_to_file_with_file_path() {
check_assist(
extract_module_to_file,
r#"
//- /src/foo.rs crate:foo
mod bar {<|>
fn f() {
}
}
fn main() {
println!("Hello, world!");
}
"#,
r#"
//- /src/foo.rs
mod bar;
fn main() {
println!("Hello, world!");
}
//- /src/foo/bar.rs
fn f() {
}"#,
)
}
#[test]
fn extract_module_to_file_with_main_filw() {
check_assist(
extract_module_to_file,
r#"
//- /main.rs
mod foo {<|>
fn f() {
}
}
fn main() {
println!("Hello, world!");
}
"#,
r#"
//- /main.rs
mod foo;
fn main() {
println!("Hello, world!");
}
//- /foo.rs
fn f() {
}"#,
)
}
#[test]
fn extract_module_to_file_with_lib_file() {
check_assist(
extract_module_to_file,
r#"
//- /lib.rs
mod foo {<|>
fn f() {
}
}
fn main() {
println!("Hello, world!");
}
"#,
r#"
//- /lib.rs
mod foo;
fn main() {
println!("Hello, world!");
}
//- /foo.rs
fn f() {
}"#,
)
}
}
|
