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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"]
mod db;
pub mod mock_analysis;
mod symbol_index;
mod change;
mod source_change;
mod feature_flags;
mod status;
mod completion;
mod runnables;
mod goto_definition;
mod goto_type_definition;
mod extend_selection;
mod hover;
mod call_info;
mod syntax_highlighting;
mod parent_module;
mod references;
mod impls;
mod assists;
mod diagnostics;
mod syntax_tree;
mod folding_ranges;
mod line_index;
mod line_index_utils;
mod join_lines;
mod typing;
mod matching_brace;
mod display;
mod inlay_hints;
mod wasm_shims;
mod expand;
mod expand_macro;
#[cfg(test)]
mod marks;
#[cfg(test)]
mod test_utils;
use std::sync::Arc;
use ra_cfg::CfgOptions;
use ra_db::{
salsa::{self, ParallelDatabase},
CheckCanceled, Env, FileLoader, SourceDatabase,
};
use ra_syntax::{tokenize, SourceFile, SyntaxKind, TextRange, TextUnit};
use crate::{db::LineIndexDatabase, display::ToNav, symbol_index::FileSymbol};
pub use crate::{
assists::{Assist, AssistId},
change::{AnalysisChange, LibraryData},
completion::{CompletionItem, CompletionItemKind, InsertTextFormat},
diagnostics::Severity,
display::{file_structure, FunctionSignature, NavigationTarget, StructureNode},
expand_macro::ExpandedMacro,
feature_flags::FeatureFlags,
folding_ranges::{Fold, FoldKind},
hover::HoverResult,
inlay_hints::{InlayHint, InlayKind},
line_index::{LineCol, LineIndex},
line_index_utils::translate_offset_with_edit,
references::{ReferenceSearchResult, SearchScope},
runnables::{Runnable, RunnableKind},
source_change::{FileSystemEdit, SourceChange, SourceFileEdit},
syntax_highlighting::HighlightedRange,
};
pub use hir::Documentation;
pub use ra_db::{
Canceled, CrateGraph, CrateId, Edition, FileId, FilePosition, FileRange, SourceRootId,
};
pub type Cancelable<T> = Result<T, Canceled>;
#[derive(Debug)]
pub struct Diagnostic {
pub message: String,
pub range: TextRange,
pub fix: Option<SourceChange>,
pub severity: Severity,
}
#[derive(Debug)]
pub struct Query {
query: String,
lowercased: String,
only_types: bool,
libs: bool,
exact: bool,
limit: usize,
}
impl Query {
pub fn new(query: String) -> Query {
let lowercased = query.to_lowercase();
Query {
query,
lowercased,
only_types: false,
libs: false,
exact: false,
limit: usize::max_value(),
}
}
pub fn only_types(&mut self) {
self.only_types = true;
}
pub fn libs(&mut self) {
self.libs = true;
}
pub fn exact(&mut self) {
self.exact = true;
}
pub fn limit(&mut self, limit: usize) {
self.limit = limit
}
}
/// 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 }
}
}
/// Contains information about a call site. Specifically the
/// `FunctionSignature`and current parameter.
#[derive(Debug)]
pub struct CallInfo {
pub signature: FunctionSignature,
pub active_parameter: Option<usize>,
}
/// `AnalysisHost` stores the current state of the world.
#[derive(Debug)]
pub struct AnalysisHost {
db: db::RootDatabase,
}
impl Default for AnalysisHost {
fn default() -> AnalysisHost {
AnalysisHost::new(None, FeatureFlags::default())
}
}
impl AnalysisHost {
pub fn new(lru_capcity: Option<usize>, feature_flags: FeatureFlags) -> AnalysisHost {
AnalysisHost { db: db::RootDatabase::new(lru_capcity, feature_flags) }
}
/// Returns a snapshot of the current state, which you can query for
/// semantic information.
pub fn analysis(&self) -> Analysis {
Analysis { db: self.db.snapshot() }
}
pub fn feature_flags(&self) -> &FeatureFlags {
&self.db.feature_flags
}
/// 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 raw_database(
&self,
) -> &(impl hir::db::HirDatabase + salsa::Database + ra_db::SourceDatabaseExt) {
&self.db
}
pub fn raw_database_mut(
&mut self,
) -> &mut (impl hir::db::HirDatabase + salsa::Database + ra_db::SourceDatabaseExt) {
&mut self.db
}
}
/// 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<db::RootDatabase>,
}
// 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 source_root = SourceRootId(0);
let mut change = AnalysisChange::new();
change.add_root(source_root, true);
let mut crate_graph = CrateGraph::default();
let file_id = FileId(0);
// 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, cfg_options, Env::default());
change.add_file(source_root, file_id, "main.rs".into(), Arc::new(text));
change.set_crate_graph(crate_graph);
host.apply_change(change);
(host.analysis(), file_id)
}
/// Features for Analysis.
pub fn feature_flags(&self) -> &FeatureFlags {
&self.db.feature_flags
}
/// Debug info about the current state of the analysis.
pub fn status(&self) -> Cancelable<String> {
self.with_db(|db| status::status(&*db))
}
/// 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<TextUnit>> {
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<SourceChange> {
self.with_db(|db| {
let parse = db.parse(frange.file_id);
let file_edit = SourceFileEdit {
file_id: frange.file_id,
edit: join_lines::join_lines(&parse.tree(), frange.range),
};
SourceChange::source_file_edit("join lines", file_edit)
})
}
/// Returns an edit which should be applied when opening a new line, fixing
/// up minor stuff like continuing the comment.
pub fn on_enter(&self, position: FilePosition) -> Cancelable<Option<SourceChange>> {
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(&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,
max_inlay_hint_length: Option<usize>,
) -> Cancelable<Vec<InlayHint>> {
self.with_db(|db| {
inlay_hints::inlay_hints(db, file_id, &db.parse(file_id).tree(), max_inlay_hint_length)
})
}
/// 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| impls::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(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))
}
/// 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 root file of the given crate.
pub fn crate_root(&self, crate_id: CrateId) -> Cancelable<FileId> {
self.with_db(|db| db.crate_graph().crate_root(crate_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))
}
/// 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, position: FilePosition) -> Cancelable<Option<Vec<CompletionItem>>> {
self.with_db(|db| completion::completions(db, position).map(Into::into))
}
/// Computes assists (aka code actions aka intentions) for the given
/// position.
pub fn assists(&self, frange: FileRange) -> Cancelable<Vec<Assist>> {
self.with_db(|db| assists::assists(db, frange))
}
/// Computes the set of diagnostics for the given file.
pub fn diagnostics(&self, file_id: FileId) -> Cancelable<Vec<Diagnostic>> {
self.with_db(|db| diagnostics::diagnostics(db, file_id))
}
/// Computes the type of the expression at the given position.
pub fn type_of(&self, frange: FileRange) -> Cancelable<Option<String>> {
self.with_db(|db| hover::type_of(db, frange))
}
/// 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>>> {
let tokens = tokenize(new_name);
if tokens.len() != 1
|| (tokens[0].kind != SyntaxKind::IDENT && tokens[0].kind != SyntaxKind::UNDERSCORE)
{
return Ok(None);
}
self.with_db(|db| references::rename(db, position, new_name))
}
/// Performs an operation on that may be Canceled.
fn with_db<F: FnOnce(&db::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>();
}
|