1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136

//! This crate defines the core datastructure representing IDE state -- `RootDatabase`.
//!
//! It is mainly a `HirDatabase` for semantic analysis, plus a `SymbolsDatabase`, for fuzzy search.

mod apply_change;
pub mod label;
pub mod line_index;
pub mod symbol_index;
pub mod defs;
pub mod search;
pub mod imports_locator;
pub mod source_change;
pub mod ty_filter;
pub mod traits;
pub mod call_info;
pub mod helpers;

use std::{fmt, sync::Arc};

use base_db::{
    salsa::{self, Durability},
    AnchoredPath, Canceled, CheckCanceled, CrateId, FileId, FileLoader, FileLoaderDelegate,
    SourceDatabase, Upcast,
};
use hir::db::{AstDatabase, DefDatabase, HirDatabase};
use rustc_hash::FxHashSet;

use crate::{line_index::LineIndex, symbol_index::SymbolsDatabase};

/// `base_db` is normally also needed in places where `ide_db` is used, so this re-export is for convenience.
pub use base_db;

#[salsa::database(
    base_db::SourceDatabaseStorage,
    base_db::SourceDatabaseExtStorage,
    LineIndexDatabaseStorage,
    symbol_index::SymbolsDatabaseStorage,
    hir::db::InternDatabaseStorage,
    hir::db::AstDatabaseStorage,
    hir::db::DefDatabaseStorage,
    hir::db::HirDatabaseStorage
)]
pub struct RootDatabase {
    storage: salsa::Storage<RootDatabase>,
}

impl fmt::Debug for RootDatabase {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.debug_struct("RootDatabase").finish()
    }
}

impl Upcast<dyn AstDatabase> for RootDatabase {
    fn upcast(&self) -> &(dyn AstDatabase + 'static) {
        &*self
    }
}

impl Upcast<dyn DefDatabase> for RootDatabase {
    fn upcast(&self) -> &(dyn DefDatabase + 'static) {
        &*self
    }
}

impl Upcast<dyn HirDatabase> for RootDatabase {
    fn upcast(&self) -> &(dyn HirDatabase + 'static) {
        &*self
    }
}

impl FileLoader for RootDatabase {
    fn file_text(&self, file_id: FileId) -> Arc<String> {
        FileLoaderDelegate(self).file_text(file_id)
    }
    fn resolve_path(&self, path: AnchoredPath) -> Option<FileId> {
        FileLoaderDelegate(self).resolve_path(path)
    }
    fn relevant_crates(&self, file_id: FileId) -> Arc<FxHashSet<CrateId>> {
        FileLoaderDelegate(self).relevant_crates(file_id)
    }
}

impl salsa::Database for RootDatabase {
    fn on_propagated_panic(&self) -> ! {
        Canceled::throw()
    }
    fn salsa_event(&self, event: salsa::Event) {
        match event.kind {
            salsa::EventKind::DidValidateMemoizedValue { .. }
            | salsa::EventKind::WillExecute { .. } => {
                self.check_canceled();
            }
            _ => (),
        }
    }
}

impl Default for RootDatabase {
    fn default() -> RootDatabase {
        RootDatabase::new(None)
    }
}

impl RootDatabase {
    pub fn new(lru_capacity: Option<usize>) -> RootDatabase {
        let mut db = RootDatabase { storage: salsa::Storage::default() };
        db.set_crate_graph_with_durability(Default::default(), Durability::HIGH);
        db.set_local_roots_with_durability(Default::default(), Durability::HIGH);
        db.set_library_roots_with_durability(Default::default(), Durability::HIGH);
        db.update_lru_capacity(lru_capacity);
        db
    }

    pub fn update_lru_capacity(&mut self, lru_capacity: Option<usize>) {
        let lru_capacity = lru_capacity.unwrap_or(base_db::DEFAULT_LRU_CAP);
        base_db::ParseQuery.in_db_mut(self).set_lru_capacity(lru_capacity);
        hir::db::ParseMacroExpansionQuery.in_db_mut(self).set_lru_capacity(lru_capacity);
        hir::db::MacroExpandQuery.in_db_mut(self).set_lru_capacity(lru_capacity);
    }
}

impl salsa::ParallelDatabase for RootDatabase {
    fn snapshot(&self) -> salsa::Snapshot<RootDatabase> {
        salsa::Snapshot::new(RootDatabase { storage: self.storage.snapshot() })
    }
}

#[salsa::query_group(LineIndexDatabaseStorage)]
pub trait LineIndexDatabase: base_db::SourceDatabase + CheckCanceled {
    fn line_index(&self, file_id: FileId) -> Arc<LineIndex>;
}

fn line_index(db: &dyn LineIndexDatabase, file_id: FileId) -> Arc<LineIndex> {
    let text = db.file_text(file_id);
    Arc::new(LineIndex::new(&*text))
}