Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/ide_assists/src/handlers/move_to_mod_rs.rs')
| -rw-r--r-- | crates/ide_assists/src/handlers/move_to_mod_rs.rs | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/crates/ide_assists/src/handlers/move_to_mod_rs.rs b/crates/ide_assists/src/handlers/move_to_mod_rs.rs new file mode 100644 index 0000000000..9b060bb710 --- /dev/null +++ b/crates/ide_assists/src/handlers/move_to_mod_rs.rs @@ -0,0 +1,180 @@ +use ide_db::{ + assists::{AssistId, AssistKind}, + base_db::AnchoredPathBuf, +}; +use syntax::{ + ast::{self, Whitespace}, + AstNode, AstToken, SourceFile, TextRange, TextSize, +}; + +use crate::assist_context::{AssistContext, Assists}; + +/// Trim(remove leading and trailing whitespace) `initial_range` in `source_file`, return the trimmed range. +fn trimmed_text_range(source_file: &SourceFile, initial_range: TextRange) -> TextRange { + let mut trimmed_range = initial_range; + while source_file + .syntax() + .token_at_offset(trimmed_range.start()) + .find_map(Whitespace::cast) + .is_some() + && trimmed_range.start() < trimmed_range.end() + { + let start = trimmed_range.start() + TextSize::from(1); + trimmed_range = TextRange::new(start, trimmed_range.end()); + } + while source_file + .syntax() + .token_at_offset(trimmed_range.end()) + .find_map(Whitespace::cast) + .is_some() + && trimmed_range.start() < trimmed_range.end() + { + let end = trimmed_range.end() - TextSize::from(1); + trimmed_range = TextRange::new(trimmed_range.start(), end); + } + trimmed_range +} + +// Assist: move_to_mod_rs +// +// Moves xxx.rs to xxx/mod.rs. +// +// ``` +// //- /main.rs +// mod a; +// //- /a.rs +// $0fn t() {}$0 +// ``` +// -> +// ``` +// fn t() {} +// ``` +pub(crate) fn move_to_mod_rs(acc: &mut Assists, ctx: &AssistContext) -> Option<()> { + let source_file = ctx.find_node_at_offset::<ast::SourceFile>()?; + let module = ctx.sema.to_module_def(ctx.frange.file_id)?; + // Enable this assist if the user select all "meaningful" content in the source file + let trimmed_selected_range = trimmed_text_range(&source_file, ctx.frange.range); + let trimmed_file_range = trimmed_text_range(&source_file, source_file.syntax().text_range()); + if module.is_mod_rs(ctx.db()) { + cov_mark::hit!(already_mod_rs); + return None; + } + if trimmed_selected_range != trimmed_file_range { + cov_mark::hit!(not_all_selected); + return None; + } + + let target = TextRange::new( + source_file.syntax().text_range().start(), + source_file.syntax().text_range().end(), + ); + let module_name = module.name(ctx.db())?.to_string(); + let path = format!("./{}/mod.rs", module_name); + let dst = AnchoredPathBuf { anchor: ctx.frange.file_id, path }; + acc.add( + AssistId("move_to_mod_rs", AssistKind::Refactor), + format!("Turn {}.rs to {}/mod.rs", module_name, module_name), + target, + |builder| { + builder.move_file(ctx.frange.file_id, dst); + }, + ) +} + +#[cfg(test)] +mod tests { + use crate::tests::{check_assist, check_assist_not_applicable}; + + use super::*; + + #[test] + fn trivial() { + check_assist( + move_to_mod_rs, + r#" +//- /main.rs +mod a; +//- /a.rs +$0fn t() {} +$0"#, + r#" +//- /a/mod.rs +fn t() {} +"#, + ); + } + + #[test] + fn must_select_all_file() { + cov_mark::check!(not_all_selected); + check_assist_not_applicable( + move_to_mod_rs, + r#" +//- /main.rs +mod a; +//- /a.rs +fn t() {}$0 +"#, + ); + cov_mark::check!(not_all_selected); + check_assist_not_applicable( + move_to_mod_rs, + r#" +//- /main.rs +mod a; +//- /a.rs +$0fn$0 t() {} +"#, + ); + } + + #[test] + fn cannot_promote_mod_rs() { + cov_mark::check!(already_mod_rs); + check_assist_not_applicable( + move_to_mod_rs, + r#"//- /main.rs +mod a; +//- /a/mod.rs +$0fn t() {}$0 +"#, + ); + } + + #[test] + fn cannot_promote_main_and_lib_rs() { + check_assist_not_applicable( + move_to_mod_rs, + r#"//- /main.rs +$0fn t() {}$0 +"#, + ); + check_assist_not_applicable( + move_to_mod_rs, + r#"//- /lib.rs +$0fn t() {}$0 +"#, + ); + } + + #[test] + fn works_in_mod() { + // note: /a/b.rs remains untouched + check_assist( + move_to_mod_rs, + r#"//- /main.rs +mod a; +//- /a.rs +$0mod b; +fn t() {}$0 +//- /a/b.rs +fn t1() {} +"#, + r#" +//- /a/mod.rs +mod b; +fn t() {} +"#, + ); + } +} |