| use ide_db::SymbolKind; |
| use syntax::{ |
| AstNode, AstToken, NodeOrToken, SourceFile, SyntaxNode, SyntaxToken, TextRange, WalkEvent, |
| ast::{self, HasAttrs, HasGenericParams, HasName}, |
| match_ast, |
| }; |
| |
| #[derive(Debug, Clone)] |
| pub struct StructureNode { |
| pub parent: Option<usize>, |
| pub label: String, |
| pub navigation_range: TextRange, |
| pub node_range: TextRange, |
| pub kind: StructureNodeKind, |
| pub detail: Option<String>, |
| pub deprecated: bool, |
| } |
| |
| #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)] |
| pub enum StructureNodeKind { |
| SymbolKind(SymbolKind), |
| ExternBlock, |
| Region, |
| } |
| |
| #[derive(Debug, Clone)] |
| pub struct FileStructureConfig { |
| pub exclude_locals: bool, |
| } |
| |
| // Feature: File Structure |
| // |
| // Provides a tree of the symbols defined in the file. Can be used to |
| // |
| // * fuzzy search symbol in a file (super useful) |
| // * draw breadcrumbs to describe the context around the cursor |
| // * draw outline of the file |
| // |
| // | Editor | Shortcut | |
| // |---------|----------| |
| // | VS Code | <kbd>Ctrl+Shift+O</kbd> | |
| // |
| //  |
| pub(crate) fn file_structure( |
| file: &SourceFile, |
| config: &FileStructureConfig, |
| ) -> Vec<StructureNode> { |
| let mut res = Vec::new(); |
| let mut stack = Vec::new(); |
| |
| for event in file.syntax().preorder_with_tokens() { |
| match event { |
| WalkEvent::Enter(NodeOrToken::Node(node)) => { |
| if let Some(mut symbol) = structure_node(&node, config) { |
| symbol.parent = stack.last().copied(); |
| stack.push(res.len()); |
| res.push(symbol); |
| } |
| } |
| WalkEvent::Leave(NodeOrToken::Node(node)) => { |
| if structure_node(&node, config).is_some() { |
| stack.pop().unwrap(); |
| } |
| } |
| WalkEvent::Enter(NodeOrToken::Token(token)) => { |
| if let Some(mut symbol) = structure_token(token) { |
| symbol.parent = stack.last().copied(); |
| stack.push(res.len()); |
| res.push(symbol); |
| } |
| } |
| WalkEvent::Leave(NodeOrToken::Token(token)) => { |
| if structure_token(token).is_some() { |
| stack.pop().unwrap(); |
| } |
| } |
| } |
| } |
| res |
| } |
| |
| fn structure_node(node: &SyntaxNode, config: &FileStructureConfig) -> Option<StructureNode> { |
| fn decl<N: HasName + HasAttrs>(node: N, kind: StructureNodeKind) -> Option<StructureNode> { |
| decl_with_detail(&node, None, kind) |
| } |
| |
| fn decl_with_type_ref<N: HasName + HasAttrs>( |
| node: &N, |
| type_ref: Option<ast::Type>, |
| kind: StructureNodeKind, |
| ) -> Option<StructureNode> { |
| let detail = type_ref.map(|type_ref| { |
| let mut detail = String::new(); |
| collapse_ws(type_ref.syntax(), &mut detail); |
| detail |
| }); |
| decl_with_detail(node, detail, kind) |
| } |
| |
| fn decl_with_detail<N: HasName + HasAttrs>( |
| node: &N, |
| detail: Option<String>, |
| kind: StructureNodeKind, |
| ) -> Option<StructureNode> { |
| let name = node.name()?; |
| |
| Some(StructureNode { |
| parent: None, |
| label: name.text().to_string(), |
| navigation_range: name.syntax().text_range(), |
| node_range: node.syntax().text_range(), |
| kind, |
| detail, |
| deprecated: node.attrs().filter_map(|x| x.simple_name()).any(|x| x == "deprecated"), |
| }) |
| } |
| |
| fn collapse_ws(node: &SyntaxNode, output: &mut String) { |
| let mut can_insert_ws = false; |
| node.text().for_each_chunk(|chunk| { |
| for line in chunk.lines() { |
| let line = line.trim(); |
| if line.is_empty() { |
| if can_insert_ws { |
| output.push(' '); |
| can_insert_ws = false; |
| } |
| } else { |
| output.push_str(line); |
| can_insert_ws = true; |
| } |
| } |
| }) |
| } |
| |
| match_ast! { |
| match node { |
| ast::Fn(it) => { |
| let mut detail = String::from("fn"); |
| if let Some(type_param_list) = it.generic_param_list() { |
| collapse_ws(type_param_list.syntax(), &mut detail); |
| } |
| let has_self_param = if let Some(param_list) = it.param_list() { |
| collapse_ws(param_list.syntax(), &mut detail); |
| param_list.self_param().is_some() |
| } else { |
| false |
| }; |
| if let Some(ret_type) = it.ret_type() { |
| detail.push(' '); |
| collapse_ws(ret_type.syntax(), &mut detail); |
| } |
| |
| decl_with_detail(&it, Some(detail), StructureNodeKind::SymbolKind(if has_self_param { |
| SymbolKind::Method |
| } else { |
| SymbolKind::Function |
| })) |
| }, |
| ast::Struct(it) => decl(it, StructureNodeKind::SymbolKind(SymbolKind::Struct)), |
| ast::Union(it) => decl(it, StructureNodeKind::SymbolKind(SymbolKind::Union)), |
| ast::Enum(it) => decl(it, StructureNodeKind::SymbolKind(SymbolKind::Enum)), |
| ast::Variant(it) => decl(it, StructureNodeKind::SymbolKind(SymbolKind::Variant)), |
| ast::Trait(it) => decl(it, StructureNodeKind::SymbolKind(SymbolKind::Trait)), |
| ast::TraitAlias(it) => decl(it, StructureNodeKind::SymbolKind(SymbolKind::TraitAlias)), |
| ast::Module(it) => decl(it, StructureNodeKind::SymbolKind(SymbolKind::Module)), |
| ast::Macro(it) => decl(it, StructureNodeKind::SymbolKind(SymbolKind::Macro)), |
| ast::TypeAlias(it) => decl_with_type_ref(&it, it.ty(), StructureNodeKind::SymbolKind(SymbolKind::TypeAlias)), |
| ast::RecordField(it) => decl_with_type_ref(&it, it.ty(), StructureNodeKind::SymbolKind(SymbolKind::Field)), |
| ast::Const(it) => decl_with_type_ref(&it, it.ty(), StructureNodeKind::SymbolKind(SymbolKind::Const)), |
| ast::Static(it) => decl_with_type_ref(&it, it.ty(), StructureNodeKind::SymbolKind(SymbolKind::Static)), |
| ast::Impl(it) => { |
| let target_type = it.self_ty()?; |
| let target_trait = it.trait_(); |
| let label = match target_trait { |
| None => format!("impl {}", target_type.syntax().text()), |
| Some(t) => { |
| format!("impl {}{} for {}", |
| it.excl_token().map(|x| x.to_string()).unwrap_or_default(), |
| t.syntax().text(), |
| target_type.syntax().text(), |
| ) |
| } |
| }; |
| |
| let node = StructureNode { |
| parent: None, |
| label, |
| navigation_range: target_type.syntax().text_range(), |
| node_range: it.syntax().text_range(), |
| kind: StructureNodeKind::SymbolKind(SymbolKind::Impl), |
| detail: None, |
| deprecated: false, |
| }; |
| Some(node) |
| }, |
| ast::LetStmt(it) => { |
| if config.exclude_locals { |
| return None; |
| } |
| |
| let pat = it.pat()?; |
| |
| let mut label = String::new(); |
| collapse_ws(pat.syntax(), &mut label); |
| |
| let node = StructureNode { |
| parent: None, |
| label, |
| navigation_range: pat.syntax().text_range(), |
| node_range: it.syntax().text_range(), |
| kind: StructureNodeKind::SymbolKind(SymbolKind::Local), |
| detail: it.ty().map(|ty| ty.to_string()), |
| deprecated: false, |
| }; |
| |
| Some(node) |
| }, |
| ast::ExternBlock(it) => { |
| let mut label = "extern".to_owned(); |
| let abi = it.abi()?; |
| if let Some(abi) = abi.string_token() { |
| label.push(' '); |
| label.push_str(abi.text()); |
| } |
| Some(StructureNode { |
| parent: None, |
| label, |
| navigation_range: abi.syntax().text_range(), |
| node_range: it.syntax().text_range(), |
| kind: StructureNodeKind::ExternBlock, |
| detail: None, |
| deprecated: false, |
| }) |
| }, |
| _ => None, |
| } |
| } |
| } |
| |
| fn structure_token(token: SyntaxToken) -> Option<StructureNode> { |
| if let Some(comment) = ast::Comment::cast(token) { |
| let text = comment.text().trim(); |
| |
| if let Some(region_name) = |
| text.strip_prefix("// region:").map(str::trim).filter(|it| !it.is_empty()) |
| { |
| return Some(StructureNode { |
| parent: None, |
| label: region_name.to_owned(), |
| navigation_range: comment.syntax().text_range(), |
| node_range: comment.syntax().text_range(), |
| kind: StructureNodeKind::Region, |
| detail: None, |
| deprecated: false, |
| }); |
| } |
| } |
| |
| None |
| } |
| |
| #[cfg(test)] |
| mod tests { |
| use expect_test::{Expect, expect}; |
| |
| use super::*; |
| |
| const DEFAULT_CONFIG: FileStructureConfig = FileStructureConfig { exclude_locals: true }; |
| |
| fn check(#[rust_analyzer::rust_fixture] ra_fixture: &str, expect: Expect) { |
| check_with_config(ra_fixture, &DEFAULT_CONFIG, expect); |
| } |
| |
| fn check_with_config( |
| #[rust_analyzer::rust_fixture] ra_fixture: &str, |
| config: &FileStructureConfig, |
| expect: Expect, |
| ) { |
| let file = SourceFile::parse(ra_fixture, span::Edition::CURRENT).ok().unwrap(); |
| let structure = file_structure(&file, config); |
| expect.assert_debug_eq(&structure) |
| } |
| |
| #[test] |
| fn test_negative_trait_bound() { |
| let txt = r#"impl !Unpin for Test {}"#; |
| check( |
| txt, |
| expect![[r#" |
| [ |
| StructureNode { |
| parent: None, |
| label: "impl !Unpin for Test", |
| navigation_range: 16..20, |
| node_range: 0..23, |
| kind: SymbolKind( |
| Impl, |
| ), |
| detail: None, |
| deprecated: false, |
| }, |
| ] |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn test_file_structure() { |
| check( |
| r#" |
| struct Foo { |
| x: i32 |
| } |
| |
| mod m { |
| fn bar1() {} |
| fn bar2<T>(t: T) -> T {} |
| fn bar3<A, |
| B>(a: A, |
| b: B) -> Vec< |
| u32 |
| > {} |
| } |
| |
| enum E { X, Y(i32) } |
| type T = (); |
| static S: i32 = 92; |
| const C: i32 = 92; |
| trait Tr {} |
| trait Alias = Tr; |
| |
| impl E {} |
| |
| impl fmt::Debug for E {} |
| |
| macro_rules! mc { |
| () => {} |
| } |
| |
| #[macro_export] |
| macro_rules! mcexp { |
| () => {} |
| } |
| |
| /// Doc comment |
| macro_rules! mcexp { |
| () => {} |
| } |
| |
| #[deprecated] |
| fn obsolete() {} |
| |
| #[deprecated(note = "for a while")] |
| fn very_obsolete() {} |
| |
| // region: Some region name |
| // endregion |
| |
| // region: dontpanic |
| mod m { |
| fn f() {} |
| // endregion |
| fn g() {} |
| } |
| |
| extern "C" {} |
| |
| fn let_statements() { |
| let x = 42; |
| let mut y = x; |
| let Foo { |
| .. |
| } = Foo { x }; |
| if let None = Some(x) {} |
| _ = (); |
| let _ = g(); |
| } |
| "#, |
| expect![[r#" |
| [ |
| StructureNode { |
| parent: None, |
| label: "Foo", |
| navigation_range: 8..11, |
| node_range: 1..26, |
| kind: SymbolKind( |
| Struct, |
| ), |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: Some( |
| 0, |
| ), |
| label: "x", |
| navigation_range: 18..19, |
| node_range: 18..24, |
| kind: SymbolKind( |
| Field, |
| ), |
| detail: Some( |
| "i32", |
| ), |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: None, |
| label: "m", |
| navigation_range: 32..33, |
| node_range: 28..158, |
| kind: SymbolKind( |
| Module, |
| ), |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: Some( |
| 2, |
| ), |
| label: "bar1", |
| navigation_range: 43..47, |
| node_range: 40..52, |
| kind: SymbolKind( |
| Function, |
| ), |
| detail: Some( |
| "fn()", |
| ), |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: Some( |
| 2, |
| ), |
| label: "bar2", |
| navigation_range: 60..64, |
| node_range: 57..81, |
| kind: SymbolKind( |
| Function, |
| ), |
| detail: Some( |
| "fn<T>(t: T) -> T", |
| ), |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: Some( |
| 2, |
| ), |
| label: "bar3", |
| navigation_range: 89..93, |
| node_range: 86..156, |
| kind: SymbolKind( |
| Function, |
| ), |
| detail: Some( |
| "fn<A, B>(a: A, b: B) -> Vec< u32 >", |
| ), |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: None, |
| label: "E", |
| navigation_range: 165..166, |
| node_range: 160..180, |
| kind: SymbolKind( |
| Enum, |
| ), |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: Some( |
| 6, |
| ), |
| label: "X", |
| navigation_range: 169..170, |
| node_range: 169..170, |
| kind: SymbolKind( |
| Variant, |
| ), |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: Some( |
| 6, |
| ), |
| label: "Y", |
| navigation_range: 172..173, |
| node_range: 172..178, |
| kind: SymbolKind( |
| Variant, |
| ), |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: None, |
| label: "T", |
| navigation_range: 186..187, |
| node_range: 181..193, |
| kind: SymbolKind( |
| TypeAlias, |
| ), |
| detail: Some( |
| "()", |
| ), |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: None, |
| label: "S", |
| navigation_range: 201..202, |
| node_range: 194..213, |
| kind: SymbolKind( |
| Static, |
| ), |
| detail: Some( |
| "i32", |
| ), |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: None, |
| label: "C", |
| navigation_range: 220..221, |
| node_range: 214..232, |
| kind: SymbolKind( |
| Const, |
| ), |
| detail: Some( |
| "i32", |
| ), |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: None, |
| label: "Tr", |
| navigation_range: 239..241, |
| node_range: 233..244, |
| kind: SymbolKind( |
| Trait, |
| ), |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: None, |
| label: "Alias", |
| navigation_range: 251..256, |
| node_range: 245..262, |
| kind: SymbolKind( |
| TraitAlias, |
| ), |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: None, |
| label: "impl E", |
| navigation_range: 269..270, |
| node_range: 264..273, |
| kind: SymbolKind( |
| Impl, |
| ), |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: None, |
| label: "impl fmt::Debug for E", |
| navigation_range: 295..296, |
| node_range: 275..299, |
| kind: SymbolKind( |
| Impl, |
| ), |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: None, |
| label: "mc", |
| navigation_range: 314..316, |
| node_range: 301..333, |
| kind: SymbolKind( |
| Macro, |
| ), |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: None, |
| label: "mcexp", |
| navigation_range: 364..369, |
| node_range: 335..386, |
| kind: SymbolKind( |
| Macro, |
| ), |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: None, |
| label: "mcexp", |
| navigation_range: 417..422, |
| node_range: 388..439, |
| kind: SymbolKind( |
| Macro, |
| ), |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: None, |
| label: "obsolete", |
| navigation_range: 458..466, |
| node_range: 441..471, |
| kind: SymbolKind( |
| Function, |
| ), |
| detail: Some( |
| "fn()", |
| ), |
| deprecated: true, |
| }, |
| StructureNode { |
| parent: None, |
| label: "very_obsolete", |
| navigation_range: 512..525, |
| node_range: 473..530, |
| kind: SymbolKind( |
| Function, |
| ), |
| detail: Some( |
| "fn()", |
| ), |
| deprecated: true, |
| }, |
| StructureNode { |
| parent: None, |
| label: "Some region name", |
| navigation_range: 532..559, |
| node_range: 532..559, |
| kind: Region, |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: None, |
| label: "m", |
| navigation_range: 599..600, |
| node_range: 574..637, |
| kind: SymbolKind( |
| Module, |
| ), |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: Some( |
| 22, |
| ), |
| label: "dontpanic", |
| navigation_range: 574..594, |
| node_range: 574..594, |
| kind: Region, |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: Some( |
| 22, |
| ), |
| label: "f", |
| navigation_range: 606..607, |
| node_range: 603..612, |
| kind: SymbolKind( |
| Function, |
| ), |
| detail: Some( |
| "fn()", |
| ), |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: Some( |
| 22, |
| ), |
| label: "g", |
| navigation_range: 629..630, |
| node_range: 613..635, |
| kind: SymbolKind( |
| Function, |
| ), |
| detail: Some( |
| "fn()", |
| ), |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: None, |
| label: "extern \"C\"", |
| navigation_range: 639..649, |
| node_range: 639..652, |
| kind: ExternBlock, |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: None, |
| label: "let_statements", |
| navigation_range: 657..671, |
| node_range: 654..814, |
| kind: SymbolKind( |
| Function, |
| ), |
| detail: Some( |
| "fn()", |
| ), |
| deprecated: false, |
| }, |
| ] |
| "#]], |
| ); |
| } |
| |
| #[test] |
| fn test_file_structure_include_locals() { |
| check_with_config( |
| r#" |
| struct Foo { |
| x: i32 |
| } |
| |
| mod m { |
| fn bar1() {} |
| fn bar2<T>(t: T) -> T {} |
| fn bar3<A, |
| B>(a: A, |
| b: B) -> Vec< |
| u32 |
| > {} |
| } |
| |
| enum E { X, Y(i32) } |
| type T = (); |
| static S: i32 = 42; |
| const C: i32 = 42; |
| trait Tr {} |
| trait Alias = Tr; |
| |
| macro_rules! mc { |
| () => {} |
| } |
| |
| fn let_statements() { |
| let x = 42; |
| let mut y = x; |
| let Foo { |
| .. |
| } = Foo { x }; |
| _ = (); |
| let _ = g(); |
| } |
| "#, |
| &FileStructureConfig { exclude_locals: false }, |
| expect![[r#" |
| [ |
| StructureNode { |
| parent: None, |
| label: "Foo", |
| navigation_range: 8..11, |
| node_range: 1..26, |
| kind: SymbolKind( |
| Struct, |
| ), |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: Some( |
| 0, |
| ), |
| label: "x", |
| navigation_range: 18..19, |
| node_range: 18..24, |
| kind: SymbolKind( |
| Field, |
| ), |
| detail: Some( |
| "i32", |
| ), |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: None, |
| label: "m", |
| navigation_range: 32..33, |
| node_range: 28..158, |
| kind: SymbolKind( |
| Module, |
| ), |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: Some( |
| 2, |
| ), |
| label: "bar1", |
| navigation_range: 43..47, |
| node_range: 40..52, |
| kind: SymbolKind( |
| Function, |
| ), |
| detail: Some( |
| "fn()", |
| ), |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: Some( |
| 2, |
| ), |
| label: "bar2", |
| navigation_range: 60..64, |
| node_range: 57..81, |
| kind: SymbolKind( |
| Function, |
| ), |
| detail: Some( |
| "fn<T>(t: T) -> T", |
| ), |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: Some( |
| 2, |
| ), |
| label: "bar3", |
| navigation_range: 89..93, |
| node_range: 86..156, |
| kind: SymbolKind( |
| Function, |
| ), |
| detail: Some( |
| "fn<A, B>(a: A, b: B) -> Vec< u32 >", |
| ), |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: None, |
| label: "E", |
| navigation_range: 165..166, |
| node_range: 160..180, |
| kind: SymbolKind( |
| Enum, |
| ), |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: Some( |
| 6, |
| ), |
| label: "X", |
| navigation_range: 169..170, |
| node_range: 169..170, |
| kind: SymbolKind( |
| Variant, |
| ), |
| detail: None, |
| deprecated: false, |
| }, |
| StructureNode { |
| parent: Some( |
| 6, |
| ), |
| label: "Y", |
| navigation_range: 172..173, |
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