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|
//! ra_ide_api 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.
//!
//! The sibling `ra_ide_api_light` handles those bits of IDE functionality
//! which are restricted to a single file and need only syntax.
// For proving that RootDatabase is RefUnwindSafe.
#![recursion_limit = "128"]
mod db;
pub mod mock_analysis;
mod symbol_index;
mod navigation_target;
mod change;
mod status;
mod completion;
mod runnables;
mod goto_definition;
mod extend_selection;
mod hover;
mod call_info;
mod syntax_highlighting;
mod parent_module;
mod references;
mod impls;
mod assists;
mod diagnostics;
#[cfg(test)]
mod marks;
use std::sync::Arc;
use ra_syntax::{SourceFile, TreeArc, TextRange, TextUnit, AstNode, algo};
use ra_text_edit::TextEdit;
use ra_db::{
SourceDatabase, CheckCanceled,
salsa::{self, ParallelDatabase},
};
use relative_path::RelativePathBuf;
use crate::{
symbol_index::FileSymbol,
db::LineIndexDatabase,
};
pub use crate::{
change::{AnalysisChange, LibraryData},
completion::{CompletionItem, CompletionItemKind, InsertTextFormat},
runnables::{Runnable, RunnableKind},
navigation_target::NavigationTarget,
references::ReferenceSearchResult,
assists::{Assist, AssistId},
hover::{HoverResult},
};
pub use ra_ide_api_light::{
Fold, FoldKind, HighlightedRange, Severity, StructureNode, LocalEdit,
LineIndex, LineCol, translate_offset_with_edit,
};
pub use ra_db::{
Canceled, CrateGraph, CrateId, FileId, FilePosition, FileRange, SourceRootId,
Edition
};
pub use hir::Documentation;
// We use jemalloc mainly to get heap usage statistics, actual performance
// difference is not measures.
#[cfg(feature = "jemalloc")]
#[global_allocator]
static ALLOC: jemallocator::Jemalloc = jemallocator::Jemalloc;
pub type Cancelable<T> = Result<T, Canceled>;
#[derive(Debug)]
pub struct SourceChange {
pub label: String,
pub source_file_edits: Vec<SourceFileEdit>,
pub file_system_edits: Vec<FileSystemEdit>,
pub cursor_position: Option<FilePosition>,
}
#[derive(Debug)]
pub struct SourceFileEdit {
pub file_id: FileId,
pub edit: TextEdit,
}
#[derive(Debug)]
pub enum FileSystemEdit {
CreateFile { source_root: SourceRootId, path: RelativePathBuf },
MoveFile { src: FileId, dst_source_root: SourceRootId, dst_path: RelativePathBuf },
}
#[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
}
}
#[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 }
}
}
#[derive(Debug)]
pub struct CallInfo {
pub label: String,
pub doc: Option<Documentation>,
pub parameters: Vec<String>,
pub active_parameter: Option<usize>,
}
/// `AnalysisHost` stores the current state of the world.
#[derive(Debug, Default)]
pub struct AnalysisHost {
db: db::RootDatabase,
}
impl AnalysisHost {
/// Returns a snapshot of the current state, which you can query for
/// semantic information.
pub fn analysis(&self) -> Analysis {
Analysis { db: self.db.snapshot() }
}
/// 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();
}
}
/// 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 {
/// Debug info about the current state of the analysis
pub fn status(&self) -> String {
status::status(&*self.db)
}
/// Gets the text of the source file.
pub fn file_text(&self, file_id: FileId) -> Arc<String> {
self.db.file_text(file_id)
}
/// Gets the syntax tree of the file.
pub fn parse(&self, file_id: FileId) -> TreeArc<SourceFile> {
self.db.parse(file_id).clone()
}
/// 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) -> Arc<LineIndex> {
self.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) -> Option<TextUnit> {
let file = self.db.parse(position.file_id);
ra_ide_api_light::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>) -> String {
if let Some(text_range) = text_range {
let file = self.db.parse(file_id);
let node = algo::find_covering_node(file.syntax(), text_range);
node.debug_dump()
} else {
self.db.parse(file_id).syntax().debug_dump()
}
}
/// Returns an edit to remove all newlines in the range, cleaning up minor
/// stuff like trailing commas.
pub fn join_lines(&self, frange: FileRange) -> SourceChange {
let file = self.db.parse(frange.file_id);
SourceChange::from_local_edit(
frange.file_id,
ra_ide_api_light::join_lines(&file, frange.range),
)
}
/// 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) -> Option<SourceChange> {
let file = self.db.parse(position.file_id);
let edit = ra_ide_api_light::on_enter(&file, position.offset)?;
Some(SourceChange::from_local_edit(position.file_id, edit))
}
/// Returns an edit which should be applied after `=` was typed. Primarily,
/// this works when adding `let =`.
// FIXME: use a snippet completion instead of this hack here.
pub fn on_eq_typed(&self, position: FilePosition) -> Option<SourceChange> {
let file = self.db.parse(position.file_id);
let edit = ra_ide_api_light::on_eq_typed(&file, position.offset)?;
Some(SourceChange::from_local_edit(position.file_id, edit))
}
/// Returns an edit which should be applied when a dot ('.') is typed on a blank line, indenting the line appropriately.
pub fn on_dot_typed(&self, position: FilePosition) -> Option<SourceChange> {
let file = self.db.parse(position.file_id);
let edit = ra_ide_api_light::on_dot_typed(&file, position.offset)?;
Some(SourceChange::from_local_edit(position.file_id, edit))
}
/// Returns a tree representation of symbols in the file. Useful to draw a
/// file outline.
pub fn file_structure(&self, file_id: FileId) -> Vec<StructureNode> {
let file = self.db.parse(file_id);
ra_ide_api_light::file_structure(&file)
}
/// Returns the set of folding ranges.
pub fn folding_ranges(&self, file_id: FileId) -> Vec<Fold> {
let file = self.db.parse(file_id);
ra_ide_api_light::folding_ranges(&file)
}
/// 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(NavigationTarget::from_symbol)
.collect::<Vec<_>>()
})
}
pub fn goto_definition(
&self,
position: FilePosition,
) -> Cancelable<Option<RangeInfo<Vec<NavigationTarget>>>> {
self.with_db(|db| goto_definition::goto_definition(db, position))
}
pub fn goto_implementation(
&self,
position: FilePosition,
) -> Cancelable<Option<RangeInfo<Vec<NavigationTarget>>>> {
self.with_db(|db| impls::goto_implementation(db, position))
}
/// Finds all usages of the reference at point.
pub fn find_all_refs(
&self,
position: FilePosition,
) -> Cancelable<Option<ReferenceSearchResult>> {
self.with_db(|db| references::find_all_refs(db, position))
}
/// 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 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 (aks code actons 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<SourceChange>> {
self.with_db(|db| references::rename(db, position, new_name))
}
fn with_db<F: FnOnce(&db::RootDatabase) -> T + std::panic::UnwindSafe, T>(
&self,
f: F,
) -> Cancelable<T> {
self.db.catch_canceled(f)
}
}
impl SourceChange {
pub(crate) fn from_local_edit(file_id: FileId, edit: LocalEdit) -> SourceChange {
let file_edit = SourceFileEdit { file_id, edit: edit.edit };
SourceChange {
label: edit.label,
source_file_edits: vec![file_edit],
file_system_edits: vec![],
cursor_position: edit.cursor_position.map(|offset| FilePosition { offset, file_id }),
}
}
}
#[test]
fn analysis_is_send() {
fn is_send<T: Send>() {}
is_send::<Analysis>();
}
|