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|
//! ra_ide crate provides "ide-centric" APIs for the rust-analyzer. That is,
//! it generally operates with files and text ranges, and returns results as
//! Strings, suitable for displaying to the human.
//!
//! What powers this API are the `RootDatabase` struct, which defines a `salsa`
//! database, and the `ra_hir` crate, where majority of the analysis happens.
//! However, IDE specific bits of the analysis (most notably completion) happen
//! in this crate.
// For proving that RootDatabase is RefUnwindSafe.
#![recursion_limit = "128"]
#[allow(unused)]
macro_rules! eprintln {
($($tt:tt)*) => { stdx::eprintln!($($tt)*) };
}
pub mod mock_analysis;
mod markup;
mod prime_caches;
mod display;
mod call_hierarchy;
mod call_info;
mod completion;
mod diagnostics;
mod expand_macro;
mod extend_selection;
mod file_structure;
mod folding_ranges;
mod goto_definition;
mod goto_implementation;
mod goto_type_definition;
mod hover;
mod inlay_hints;
mod join_lines;
mod matching_brace;
mod parent_module;
mod references;
mod runnables;
mod ssr;
mod status;
mod syntax_highlighting;
mod syntax_tree;
mod typing;
use std::{collections::HashSet, sync::Arc};
use ra_cfg::CfgOptions;
use ra_db::{
salsa::{self, ParallelDatabase},
CheckCanceled, Env, FileLoader, FileSet, SourceDatabase, VfsPath,
};
use ra_ide_db::{
symbol_index::{self, FileSymbol},
LineIndexDatabase,
};
use ra_syntax::{SourceFile, TextRange, TextSize};
use crate::display::ToNav;
pub use crate::{
call_hierarchy::CallItem,
call_info::CallInfo,
completion::{
CompletionConfig, CompletionItem, CompletionItemKind, CompletionScore, InsertTextFormat,
},
diagnostics::Severity,
display::NavigationTarget,
expand_macro::ExpandedMacro,
file_structure::StructureNode,
folding_ranges::{Fold, FoldKind},
hover::{HoverAction, HoverConfig, HoverGotoTypeData, HoverResult},
inlay_hints::{InlayHint, InlayHintsConfig, InlayKind},
markup::Markup,
references::{Declaration, Reference, ReferenceAccess, ReferenceKind, ReferenceSearchResult},
runnables::{Runnable, RunnableKind, TestId},
syntax_highlighting::{
Highlight, HighlightModifier, HighlightModifiers, HighlightTag, HighlightedRange,
},
};
pub use hir::{Documentation, Semantics};
pub use ra_assists::{Assist, AssistConfig, AssistId, AssistKind, ResolvedAssist};
pub use ra_db::{
Canceled, CrateGraph, CrateId, Edition, FileId, FilePosition, FileRange, SourceRoot,
SourceRootId,
};
pub use ra_ide_db::{
change::AnalysisChange,
line_index::{LineCol, LineIndex},
search::SearchScope,
source_change::{FileSystemEdit, SourceChange, SourceFileEdit},
symbol_index::Query,
RootDatabase,
};
pub use ra_ssr::SsrError;
pub use ra_text_edit::{Indel, TextEdit};
pub type Cancelable<T> = Result<T, Canceled>;
/// Configuration parameters for the analysis run.
#[derive(Debug, Default, Clone)]
pub struct AnalysisConfig {
pub disabled_diagnostics: HashSet<String>,
}
#[derive(Debug)]
pub struct Diagnostic {
pub name: Option<String>,
pub message: String,
pub range: TextRange,
pub severity: Severity,
pub fix: Option<Fix>,
}
#[derive(Debug)]
pub struct Fix {
pub label: String,
pub source_change: SourceChange,
/// Allows to trigger the fix only when the caret is in the range given
pub fix_trigger_range: TextRange,
}
impl Fix {
pub fn new(
label: impl Into<String>,
source_change: SourceChange,
fix_trigger_range: TextRange,
) -> Self {
let label = label.into();
assert!(label.starts_with(char::is_uppercase) && !label.ends_with('.'));
Self { label, source_change, fix_trigger_range }
}
}
/// Info associated with a text range.
#[derive(Debug)]
pub struct RangeInfo<T> {
pub range: TextRange,
pub info: T,
}
impl<T> RangeInfo<T> {
pub fn new(range: TextRange, info: T) -> RangeInfo<T> {
RangeInfo { range, info }
}
}
/// `AnalysisHost` stores the current state of the world.
#[derive(Debug)]
pub struct AnalysisHost {
db: RootDatabase,
config: AnalysisConfig,
}
impl AnalysisHost {
pub fn new(lru_capacity: Option<usize>) -> Self {
Self::with_config(lru_capacity, AnalysisConfig::default())
}
pub fn with_config(lru_capacity: Option<usize>, config: AnalysisConfig) -> Self {
AnalysisHost { db: RootDatabase::new(lru_capacity), config }
}
pub fn update_lru_capacity(&mut self, lru_capacity: Option<usize>) {
self.db.update_lru_capacity(lru_capacity);
}
/// Returns a snapshot of the current state, which you can query for
/// semantic information.
pub fn analysis(&self) -> Analysis {
Analysis { db: self.db.snapshot(), config: self.config.clone() }
}
/// Applies changes to the current state of the world. If there are
/// outstanding snapshots, they will be canceled.
pub fn apply_change(&mut self, change: AnalysisChange) {
self.db.apply_change(change)
}
pub fn maybe_collect_garbage(&mut self) {
self.db.maybe_collect_garbage();
}
pub fn collect_garbage(&mut self) {
self.db.collect_garbage();
}
/// NB: this clears the database
pub fn per_query_memory_usage(&mut self) -> Vec<(String, ra_prof::Bytes)> {
self.db.per_query_memory_usage()
}
pub fn request_cancellation(&mut self) {
self.db.request_cancellation();
}
pub fn raw_database(&self) -> &RootDatabase {
&self.db
}
pub fn raw_database_mut(&mut self) -> &mut RootDatabase {
&mut self.db
}
}
impl Default for AnalysisHost {
fn default() -> AnalysisHost {
AnalysisHost::new(None)
}
}
/// Analysis is a snapshot of a world state at a moment in time. It is the main
/// entry point for asking semantic information about the world. When the world
/// state is advanced using `AnalysisHost::apply_change` method, all existing
/// `Analysis` are canceled (most method return `Err(Canceled)`).
#[derive(Debug)]
pub struct Analysis {
db: salsa::Snapshot<RootDatabase>,
config: AnalysisConfig,
}
// As a general design guideline, `Analysis` API are intended to be independent
// from the language server protocol. That is, when exposing some functionality
// we should think in terms of "what API makes most sense" and not in terms of
// "what types LSP uses". Although currently LSP is the only consumer of the
// API, the API should in theory be usable as a library, or via a different
// protocol.
impl Analysis {
// Creates an analysis instance for a single file, without any extenal
// dependencies, stdlib support or ability to apply changes. See
// `AnalysisHost` for creating a fully-featured analysis.
pub fn from_single_file(text: String) -> (Analysis, FileId) {
let mut host = AnalysisHost::default();
let file_id = FileId(0);
let mut file_set = FileSet::default();
file_set.insert(file_id, VfsPath::new_virtual_path("/main.rs".to_string()));
let source_root = SourceRoot::new_local(file_set);
let mut change = AnalysisChange::new();
change.set_roots(vec![source_root]);
let mut crate_graph = CrateGraph::default();
// FIXME: cfg options
// Default to enable test for single file.
let mut cfg_options = CfgOptions::default();
cfg_options.insert_atom("test".into());
crate_graph.add_crate_root(
file_id,
Edition::Edition2018,
None,
cfg_options,
Env::default(),
Default::default(),
);
change.change_file(file_id, Some(Arc::new(text)));
change.set_crate_graph(crate_graph);
host.apply_change(change);
(host.analysis(), file_id)
}
/// Debug info about the current state of the analysis.
pub fn status(&self) -> Cancelable<String> {
self.with_db(|db| status::status(&*db))
}
pub fn prime_caches(&self, files: Vec<FileId>) -> Cancelable<()> {
self.with_db(|db| prime_caches::prime_caches(db, files))
}
/// Gets the text of the source file.
pub fn file_text(&self, file_id: FileId) -> Cancelable<Arc<String>> {
self.with_db(|db| db.file_text(file_id))
}
/// Gets the syntax tree of the file.
pub fn parse(&self, file_id: FileId) -> Cancelable<SourceFile> {
self.with_db(|db| db.parse(file_id).tree())
}
/// Gets the file's `LineIndex`: data structure to convert between absolute
/// offsets and line/column representation.
pub fn file_line_index(&self, file_id: FileId) -> Cancelable<Arc<LineIndex>> {
self.with_db(|db| db.line_index(file_id))
}
/// Selects the next syntactic nodes encompassing the range.
pub fn extend_selection(&self, frange: FileRange) -> Cancelable<TextRange> {
self.with_db(|db| extend_selection::extend_selection(db, frange))
}
/// Returns position of the matching brace (all types of braces are
/// supported).
pub fn matching_brace(&self, position: FilePosition) -> Cancelable<Option<TextSize>> {
self.with_db(|db| {
let parse = db.parse(position.file_id);
let file = parse.tree();
matching_brace::matching_brace(&file, position.offset)
})
}
/// Returns a syntax tree represented as `String`, for debug purposes.
// FIXME: use a better name here.
pub fn syntax_tree(
&self,
file_id: FileId,
text_range: Option<TextRange>,
) -> Cancelable<String> {
self.with_db(|db| syntax_tree::syntax_tree(&db, file_id, text_range))
}
pub fn expand_macro(&self, position: FilePosition) -> Cancelable<Option<ExpandedMacro>> {
self.with_db(|db| expand_macro::expand_macro(db, position))
}
/// Returns an edit to remove all newlines in the range, cleaning up minor
/// stuff like trailing commas.
pub fn join_lines(&self, frange: FileRange) -> Cancelable<TextEdit> {
self.with_db(|db| {
let parse = db.parse(frange.file_id);
join_lines::join_lines(&parse.tree(), frange.range)
})
}
/// Returns an edit which should be applied when opening a new line, fixing
/// up minor stuff like continuing the comment.
/// The edit will be a snippet (with `$0`).
pub fn on_enter(&self, position: FilePosition) -> Cancelable<Option<TextEdit>> {
self.with_db(|db| typing::on_enter(&db, position))
}
/// Returns an edit which should be applied after a character was typed.
///
/// This is useful for some on-the-fly fixups, like adding `;` to `let =`
/// automatically.
pub fn on_char_typed(
&self,
position: FilePosition,
char_typed: char,
) -> Cancelable<Option<SourceChange>> {
// Fast path to not even parse the file.
if !typing::TRIGGER_CHARS.contains(char_typed) {
return Ok(None);
}
self.with_db(|db| typing::on_char_typed(&db, position, char_typed))
}
/// Returns a tree representation of symbols in the file. Useful to draw a
/// file outline.
pub fn file_structure(&self, file_id: FileId) -> Cancelable<Vec<StructureNode>> {
self.with_db(|db| file_structure::file_structure(&db.parse(file_id).tree()))
}
/// Returns a list of the places in the file where type hints can be displayed.
pub fn inlay_hints(
&self,
file_id: FileId,
config: &InlayHintsConfig,
) -> Cancelable<Vec<InlayHint>> {
self.with_db(|db| inlay_hints::inlay_hints(db, file_id, config))
}
/// Returns the set of folding ranges.
pub fn folding_ranges(&self, file_id: FileId) -> Cancelable<Vec<Fold>> {
self.with_db(|db| folding_ranges::folding_ranges(&db.parse(file_id).tree()))
}
/// Fuzzy searches for a symbol.
pub fn symbol_search(&self, query: Query) -> Cancelable<Vec<NavigationTarget>> {
self.with_db(|db| {
symbol_index::world_symbols(db, query)
.into_iter()
.map(|s| s.to_nav(db))
.collect::<Vec<_>>()
})
}
/// Returns the definitions from the symbol at `position`.
pub fn goto_definition(
&self,
position: FilePosition,
) -> Cancelable<Option<RangeInfo<Vec<NavigationTarget>>>> {
self.with_db(|db| goto_definition::goto_definition(db, position))
}
/// Returns the impls from the symbol at `position`.
pub fn goto_implementation(
&self,
position: FilePosition,
) -> Cancelable<Option<RangeInfo<Vec<NavigationTarget>>>> {
self.with_db(|db| goto_implementation::goto_implementation(db, position))
}
/// Returns the type definitions for the symbol at `position`.
pub fn goto_type_definition(
&self,
position: FilePosition,
) -> Cancelable<Option<RangeInfo<Vec<NavigationTarget>>>> {
self.with_db(|db| goto_type_definition::goto_type_definition(db, position))
}
/// Finds all usages of the reference at point.
pub fn find_all_refs(
&self,
position: FilePosition,
search_scope: Option<SearchScope>,
) -> Cancelable<Option<ReferenceSearchResult>> {
self.with_db(|db| {
references::find_all_refs(&Semantics::new(db), position, search_scope).map(|it| it.info)
})
}
/// Returns a short text describing element at position.
pub fn hover(&self, position: FilePosition) -> Cancelable<Option<RangeInfo<HoverResult>>> {
self.with_db(|db| hover::hover(db, position))
}
/// Computes parameter information for the given call expression.
pub fn call_info(&self, position: FilePosition) -> Cancelable<Option<CallInfo>> {
self.with_db(|db| call_info::call_info(db, position))
}
/// Computes call hierarchy candidates for the given file position.
pub fn call_hierarchy(
&self,
position: FilePosition,
) -> Cancelable<Option<RangeInfo<Vec<NavigationTarget>>>> {
self.with_db(|db| call_hierarchy::call_hierarchy(db, position))
}
/// Computes incoming calls for the given file position.
pub fn incoming_calls(&self, position: FilePosition) -> Cancelable<Option<Vec<CallItem>>> {
self.with_db(|db| call_hierarchy::incoming_calls(db, position))
}
/// Computes incoming calls for the given file position.
pub fn outgoing_calls(&self, position: FilePosition) -> Cancelable<Option<Vec<CallItem>>> {
self.with_db(|db| call_hierarchy::outgoing_calls(db, position))
}
/// Returns a `mod name;` declaration which created the current module.
pub fn parent_module(&self, position: FilePosition) -> Cancelable<Vec<NavigationTarget>> {
self.with_db(|db| parent_module::parent_module(db, position))
}
/// Returns crates this file belongs too.
pub fn crate_for(&self, file_id: FileId) -> Cancelable<Vec<CrateId>> {
self.with_db(|db| parent_module::crate_for(db, file_id))
}
/// Returns the edition of the given crate.
pub fn crate_edition(&self, crate_id: CrateId) -> Cancelable<Edition> {
self.with_db(|db| db.crate_graph()[crate_id].edition)
}
/// Returns the root file of the given crate.
pub fn crate_root(&self, crate_id: CrateId) -> Cancelable<FileId> {
self.with_db(|db| db.crate_graph()[crate_id].root_file_id)
}
/// Returns the set of possible targets to run for the current file.
pub fn runnables(&self, file_id: FileId) -> Cancelable<Vec<Runnable>> {
self.with_db(|db| runnables::runnables(db, file_id))
}
/// Computes syntax highlighting for the given file
pub fn highlight(&self, file_id: FileId) -> Cancelable<Vec<HighlightedRange>> {
self.with_db(|db| syntax_highlighting::highlight(db, file_id, None, false))
}
/// Computes syntax highlighting for the given file range.
pub fn highlight_range(&self, frange: FileRange) -> Cancelable<Vec<HighlightedRange>> {
self.with_db(|db| {
syntax_highlighting::highlight(db, frange.file_id, Some(frange.range), false)
})
}
/// Computes syntax highlighting for the given file.
pub fn highlight_as_html(&self, file_id: FileId, rainbow: bool) -> Cancelable<String> {
self.with_db(|db| syntax_highlighting::highlight_as_html(db, file_id, rainbow))
}
/// Computes completions at the given position.
pub fn completions(
&self,
config: &CompletionConfig,
position: FilePosition,
) -> Cancelable<Option<Vec<CompletionItem>>> {
self.with_db(|db| completion::completions(db, config, position).map(Into::into))
}
/// Computes resolved assists with source changes for the given position.
pub fn resolved_assists(
&self,
config: &AssistConfig,
frange: FileRange,
) -> Cancelable<Vec<ResolvedAssist>> {
self.with_db(|db| ra_assists::Assist::resolved(db, config, frange))
}
/// Computes unresolved assists (aka code actions aka intentions) for the given
/// position.
pub fn unresolved_assists(
&self,
config: &AssistConfig,
frange: FileRange,
) -> Cancelable<Vec<Assist>> {
self.with_db(|db| Assist::unresolved(db, config, frange))
}
/// Computes the set of diagnostics for the given file.
pub fn diagnostics(
&self,
file_id: FileId,
enable_experimental: bool,
) -> Cancelable<Vec<Diagnostic>> {
self.with_db(|db| diagnostics::diagnostics(db, file_id, enable_experimental, &self.config))
}
/// Returns the edit required to rename reference at the position to the new
/// name.
pub fn rename(
&self,
position: FilePosition,
new_name: &str,
) -> Cancelable<Option<RangeInfo<SourceChange>>> {
self.with_db(|db| references::rename(db, position, new_name))
}
pub fn structural_search_replace(
&self,
query: &str,
parse_only: bool,
position: FilePosition,
selections: Vec<FileRange>,
) -> Cancelable<Result<SourceChange, SsrError>> {
self.with_db(|db| {
let edits = ssr::parse_search_replace(query, parse_only, db, position, selections)?;
Ok(SourceChange::from(edits))
})
}
/// Sets the provided config.
pub fn set_config(&mut self, config: AnalysisConfig) {
self.config = config;
}
/// Performs an operation on that may be Canceled.
fn with_db<F: FnOnce(&RootDatabase) -> T + std::panic::UnwindSafe, T>(
&self,
f: F,
) -> Cancelable<T> {
self.db.catch_canceled(f)
}
}
#[test]
fn analysis_is_send() {
fn is_send<T: Send>() {}
is_send::<Analysis>();
}
|