1 //! ra_ide_api crate provides "ide-centric" APIs for the rust-analyzer. That is,
2 //! it generally operates with files and text ranges, and returns results as
3 //! Strings, suitable for displaying to the human.
5 //! What powers this API are the `RootDatabase` struct, which defines a `salsa`
6 //! database, and the `ra_hir` crate, where majority of the analysis happens.
7 //! However, IDE specific bits of the analysis (most notably completion) happen
10 //! The sibling `ra_ide_api_light` handles thouse bits of IDE functionality
11 //! which are restricted to a single file and need only syntax.
14 pub mod mock_analysis;
16 mod navigation_target;
25 mod syntax_highlighting;
32 use std::{fmt, sync::Arc};
34 use ra_syntax::{SourceFile, TreeArc, TextRange, TextUnit};
35 use ra_text_edit::TextEdit;
37 SourceDatabase, CheckCanceled,
38 salsa::{self, ParallelDatabase},
40 use rayon::prelude::*;
41 use relative_path::RelativePathBuf;
42 use rustc_hash::FxHashMap;
45 symbol_index::{FileSymbol, SymbolIndex},
46 db::LineIndexDatabase,
50 completion::{CompletionItem, CompletionItemKind, InsertTextFormat},
51 runnables::{Runnable, RunnableKind},
52 navigation_target::NavigationTarget,
54 pub use ra_ide_api_light::{
55 Fold, FoldKind, HighlightedRange, Severity, StructureNode,
56 LineIndex, LineCol, translate_offset_with_edit,
59 Canceled, CrateGraph, CrateId, FileId, FilePosition, FileRange, SourceRootId
61 pub use hir::Documentation;
63 // We use jemalloc mainly to get heap usage statistics, actual performance
64 // differnece is not measures.
65 #[cfg(feature = "jemalloc")]
67 static ALLOC: jemallocator::Jemalloc = jemallocator::Jemalloc;
69 pub type Cancelable<T> = Result<T, Canceled>;
72 pub struct AnalysisChange {
73 new_roots: Vec<(SourceRootId, bool)>,
74 roots_changed: FxHashMap<SourceRootId, RootChange>,
75 files_changed: Vec<(FileId, Arc<String>)>,
76 libraries_added: Vec<LibraryData>,
77 crate_graph: Option<CrateGraph>,
83 removed: Vec<RemoveFile>,
89 path: RelativePathBuf,
96 path: RelativePathBuf,
99 impl fmt::Debug for AnalysisChange {
100 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
101 let mut d = fmt.debug_struct("AnalysisChange");
102 if !self.new_roots.is_empty() {
103 d.field("new_roots", &self.new_roots);
105 if !self.roots_changed.is_empty() {
106 d.field("roots_changed", &self.roots_changed);
108 if !self.files_changed.is_empty() {
109 d.field("files_changed", &self.files_changed.len());
111 if !self.libraries_added.is_empty() {
112 d.field("libraries_added", &self.libraries_added.len());
114 if !self.crate_graph.is_some() {
115 d.field("crate_graph", &self.crate_graph);
121 impl fmt::Debug for RootChange {
122 fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
123 fmt.debug_struct("AnalysisChange")
124 .field("added", &self.added.len())
125 .field("removed", &self.removed.len())
130 impl AnalysisChange {
131 pub fn new() -> AnalysisChange {
132 AnalysisChange::default()
135 pub fn add_root(&mut self, root_id: SourceRootId, is_local: bool) {
136 self.new_roots.push((root_id, is_local));
141 root_id: SourceRootId,
143 path: RelativePathBuf,
158 pub fn change_file(&mut self, file_id: FileId, new_text: Arc<String>) {
159 self.files_changed.push((file_id, new_text))
162 pub fn remove_file(&mut self, root_id: SourceRootId, file_id: FileId, path: RelativePathBuf) {
163 let file = RemoveFile { file_id, path };
171 pub fn add_library(&mut self, data: LibraryData) {
172 self.libraries_added.push(data)
175 pub fn set_crate_graph(&mut self, graph: CrateGraph) {
176 self.crate_graph = Some(graph);
181 pub struct SourceChange {
183 pub source_file_edits: Vec<SourceFileEdit>,
184 pub file_system_edits: Vec<FileSystemEdit>,
185 pub cursor_position: Option<FilePosition>,
189 pub struct SourceFileEdit {
195 pub enum FileSystemEdit {
197 source_root: SourceRootId,
198 path: RelativePathBuf,
202 dst_source_root: SourceRootId,
203 dst_path: RelativePathBuf,
208 pub struct Diagnostic {
210 pub range: TextRange,
211 pub fix: Option<SourceChange>,
212 pub severity: Severity,
226 pub fn new(query: String) -> Query {
227 let lowercased = query.to_lowercase();
234 limit: usize::max_value(),
238 pub fn only_types(&mut self) {
239 self.only_types = true;
242 pub fn libs(&mut self) {
246 pub fn exact(&mut self) {
250 pub fn limit(&mut self, limit: usize) {
256 pub struct RangeInfo<T> {
257 pub range: TextRange,
261 impl<T> RangeInfo<T> {
262 pub fn new(range: TextRange, info: T) -> RangeInfo<T> {
263 RangeInfo { range, info }
268 pub struct CallInfo {
270 pub doc: Option<Documentation>,
271 pub parameters: Vec<String>,
272 pub active_parameter: Option<usize>,
275 /// `AnalysisHost` stores the current state of the world.
276 #[derive(Debug, Default)]
277 pub struct AnalysisHost {
278 db: db::RootDatabase,
282 /// Returns a snapshot of the current state, which you can query for
283 /// semantic information.
284 pub fn analysis(&self) -> Analysis {
286 db: self.db.snapshot(),
290 /// Applies changes to the current state of the world. If there are
291 /// outstanding snapshots, they will be canceled.
292 pub fn apply_change(&mut self, change: AnalysisChange) {
293 self.db.apply_change(change)
296 pub fn maybe_collect_garbage(&mut self) {
297 self.db.maybe_collect_garbage();
300 pub fn collect_garbage(&mut self) {
301 self.db.collect_garbage();
305 /// Analysis is a snapshot of a world state at a moment in time. It is the main
306 /// entry point for asking semantic information about the world. When the world
307 /// state is advanced using `AnalysisHost::apply_change` method, all existing
308 /// `Analysis` are canceled (most method return `Err(Canceled)`).
310 pub struct Analysis {
311 db: salsa::Snapshot<db::RootDatabase>,
315 /// Debug info about the current state of the analysis
316 pub fn status(&self) -> String {
317 status::status(&*self.db)
320 /// Gets the text of the source file.
321 pub fn file_text(&self, file_id: FileId) -> Arc<String> {
322 self.db.file_text(file_id)
325 /// Gets the syntax tree of the file.
326 pub fn parse(&self, file_id: FileId) -> TreeArc<SourceFile> {
327 self.db.parse(file_id).clone()
330 /// Gets the file's `LineIndex`: data structure to convert between absolute
331 /// offsets and line/column representation.
332 pub fn file_line_index(&self, file_id: FileId) -> Arc<LineIndex> {
333 self.db.line_index(file_id)
336 /// Selects the next syntactic nodes encopasing the range.
337 pub fn extend_selection(&self, frange: FileRange) -> Cancelable<TextRange> {
338 self.with_db(|db| extend_selection::extend_selection(db, frange))
341 /// Returns position of the mathcing brace (all types of braces are
343 pub fn matching_brace(&self, position: FilePosition) -> Option<TextUnit> {
344 let file = self.db.parse(position.file_id);
345 ra_ide_api_light::matching_brace(&file, position.offset)
348 /// Returns a syntax tree represented as `String`, for debug purposes.
349 // FIXME: use a better name here.
350 pub fn syntax_tree(&self, file_id: FileId) -> String {
351 let file = self.db.parse(file_id);
352 ra_ide_api_light::syntax_tree(&file)
355 /// Returns an edit to remove all newlines in the range, cleaning up minor
356 /// stuff like trailing commas.
357 pub fn join_lines(&self, frange: FileRange) -> SourceChange {
358 let file = self.db.parse(frange.file_id);
359 SourceChange::from_local_edit(
361 ra_ide_api_light::join_lines(&file, frange.range),
365 /// Returns an edit which should be applied when opening a new line, fixing
366 /// up minor stuff like continuing the comment.
367 pub fn on_enter(&self, position: FilePosition) -> Option<SourceChange> {
368 let file = self.db.parse(position.file_id);
369 let edit = ra_ide_api_light::on_enter(&file, position.offset)?;
370 Some(SourceChange::from_local_edit(position.file_id, edit))
373 /// Returns an edit which should be applied after `=` was typed. Primarily,
374 /// this works when adding `let =`.
375 // FIXME: use a snippet completion instead of this hack here.
376 pub fn on_eq_typed(&self, position: FilePosition) -> Option<SourceChange> {
377 let file = self.db.parse(position.file_id);
378 let edit = ra_ide_api_light::on_eq_typed(&file, position.offset)?;
379 Some(SourceChange::from_local_edit(position.file_id, edit))
382 /// Returns an edit which should be applied when a dot ('.') is typed on a blank line, indenting the line appropriately.
383 pub fn on_dot_typed(&self, position: FilePosition) -> Option<SourceChange> {
384 let file = self.db.parse(position.file_id);
385 let edit = ra_ide_api_light::on_dot_typed(&file, position.offset)?;
386 Some(SourceChange::from_local_edit(position.file_id, edit))
389 /// Returns a tree representation of symbols in the file. Useful to draw a
391 pub fn file_structure(&self, file_id: FileId) -> Vec<StructureNode> {
392 let file = self.db.parse(file_id);
393 ra_ide_api_light::file_structure(&file)
396 /// Returns the set of folding ranges.
397 pub fn folding_ranges(&self, file_id: FileId) -> Vec<Fold> {
398 let file = self.db.parse(file_id);
399 ra_ide_api_light::folding_ranges(&file)
402 /// Fuzzy searches for a symbol.
403 pub fn symbol_search(&self, query: Query) -> Cancelable<Vec<NavigationTarget>> {
405 symbol_index::world_symbols(db, query)
407 .map(NavigationTarget::from_symbol)
412 pub fn goto_definition(
414 position: FilePosition,
415 ) -> Cancelable<Option<RangeInfo<Vec<NavigationTarget>>>> {
416 self.with_db(|db| goto_definition::goto_definition(db, position))
419 /// Finds all usages of the reference at point.
420 pub fn find_all_refs(&self, position: FilePosition) -> Cancelable<Vec<(FileId, TextRange)>> {
421 self.with_db(|db| db.find_all_refs(position))
424 /// Returns a short text descrbing element at position.
425 pub fn hover(&self, position: FilePosition) -> Cancelable<Option<RangeInfo<String>>> {
426 self.with_db(|db| hover::hover(db, position))
429 /// Computes parameter information for the given call expression.
430 pub fn call_info(&self, position: FilePosition) -> Cancelable<Option<CallInfo>> {
431 self.with_db(|db| call_info::call_info(db, position))
434 /// Returns a `mod name;` declaration which created the current module.
435 pub fn parent_module(&self, position: FilePosition) -> Cancelable<Vec<NavigationTarget>> {
436 self.with_db(|db| parent_module::parent_module(db, position))
439 /// Returns crates this file belongs too.
440 pub fn crate_for(&self, file_id: FileId) -> Cancelable<Vec<CrateId>> {
441 self.with_db(|db| db.crate_for(file_id))
444 /// Returns the root file of the given crate.
445 pub fn crate_root(&self, crate_id: CrateId) -> Cancelable<FileId> {
446 self.with_db(|db| db.crate_graph().crate_root(crate_id))
449 /// Returns the set of possible targets to run for the current file.
450 pub fn runnables(&self, file_id: FileId) -> Cancelable<Vec<Runnable>> {
451 self.with_db(|db| runnables::runnables(db, file_id))
454 /// Computes syntax highlighting for the given file.
455 pub fn highlight(&self, file_id: FileId) -> Cancelable<Vec<HighlightedRange>> {
456 self.with_db(|db| syntax_highlighting::highlight(db, file_id))
459 /// Computes completions at the given position.
460 pub fn completions(&self, position: FilePosition) -> Cancelable<Option<Vec<CompletionItem>>> {
461 self.with_db(|db| completion::completions(db, position).map(Into::into))
464 /// Computes assists (aks code actons aka intentions) for the given
466 pub fn assists(&self, frange: FileRange) -> Cancelable<Vec<SourceChange>> {
467 self.with_db(|db| db.assists(frange))
470 /// Computes the set of diagnostics for the given file.
471 pub fn diagnostics(&self, file_id: FileId) -> Cancelable<Vec<Diagnostic>> {
472 self.with_db(|db| db.diagnostics(file_id))
475 /// Computes the type of the expression at the given position.
476 pub fn type_of(&self, frange: FileRange) -> Cancelable<Option<String>> {
477 self.with_db(|db| hover::type_of(db, frange))
480 /// Returns the edit required to rename reference at the position to the new
484 position: FilePosition,
486 ) -> Cancelable<Option<SourceChange>> {
487 self.with_db(|db| rename::rename(db, position, new_name))
490 fn with_db<F: FnOnce(&db::RootDatabase) -> T + std::panic::UnwindSafe, T>(
494 self.db.catch_canceled(f)
498 pub struct LibraryData {
499 root_id: SourceRootId,
500 root_change: RootChange,
501 symbol_index: SymbolIndex,
504 impl fmt::Debug for LibraryData {
505 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
506 f.debug_struct("LibraryData")
507 .field("root_id", &self.root_id)
508 .field("root_change", &self.root_change)
509 .field("n_symbols", &self.symbol_index.len())
516 root_id: SourceRootId,
517 files: Vec<(FileId, RelativePathBuf, Arc<String>)>,
519 let symbol_index = SymbolIndex::for_files(files.par_iter().map(|(file_id, _, text)| {
520 let file = SourceFile::parse(text);
523 let mut root_change = RootChange::default();
524 root_change.added = files
526 .map(|(file_id, path, text)| AddFile {
541 fn analysis_is_send() {
542 fn is_send<T: Send>() {}
543 is_send::<Analysis>();