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use crate::{
LanguageService,
binder::{Symbol, SymbolKind, SymbolTable},
deprecation,
helpers::LineIndexExt,
mutability,
types_analyzer::{self, CompositeType},
};
use lspt::{DocumentSymbol, DocumentSymbolParams, SymbolKind as LspSymbolKind, SymbolTag};
use rustc_hash::FxHashMap;
use wat_syntax::SyntaxKind;
impl LanguageService {
/// Handler for `textDocument/documentSymbol` request.
pub fn document_symbol(&self, params: DocumentSymbolParams) -> Option<Vec<DocumentSymbol>> {
let document = self.get_document(params.text_document.uri)?;
self.with_db(|db| {
let line_index = document.line_index(db);
let symbol_table = SymbolTable::of(db, document);
let deprecation = deprecation::get_deprecation(db, document);
let mut symbols_map = symbol_table
.symbols
.values()
.filter_map(|symbol| {
let range = line_index.convert(symbol.key.text_range());
let selection_range = line_index.convert(*symbol_table.def_poi.get(&symbol.key)?);
let tags = if deprecation.contains_key(&symbol.key) {
Some(vec![SymbolTag::Deprecated])
} else {
None
};
match symbol.kind {
SymbolKind::Module => Some((
symbol.key,
DocumentSymbol {
name: "module".into(),
detail: None,
kind: LspSymbolKind::Module,
tags,
range,
selection_range,
children: None,
},
)),
SymbolKind::Func => {
let range = line_index.convert(symbol.key.text_range());
Some((
symbol.key,
DocumentSymbol {
name: render_symbol_name(symbol, db),
detail: None,
kind: LspSymbolKind::Function,
tags,
range,
selection_range,
children: None,
},
))
}
SymbolKind::Local => {
let range = line_index.convert(symbol.key.text_range());
Some((
symbol.key,
DocumentSymbol {
name: render_symbol_name(symbol, db),
detail: types_analyzer::extract_type(db, &symbol.green)
.map(|ty| ty.render(db).to_string()),
kind: LspSymbolKind::Variable,
tags,
range,
selection_range,
children: None,
},
))
}
SymbolKind::Type => {
let def_types = types_analyzer::get_def_types(db, document);
let range = line_index.convert(symbol.key.text_range());
Some((
symbol.key,
DocumentSymbol {
name: render_symbol_name(symbol, db),
detail: def_types.get(&symbol.key).map(|def_type| match def_type.comp {
CompositeType::Func(..) => "func".into(),
CompositeType::Struct(..) => "struct".into(),
CompositeType::Array(..) => "array".into(),
CompositeType::Cont(..) => "cont".into(),
}),
kind: LspSymbolKind::Class,
tags,
range,
selection_range,
children: None,
},
))
}
SymbolKind::GlobalDef => {
let range = line_index.convert(symbol.key.text_range());
Some((
symbol.key,
DocumentSymbol {
name: render_symbol_name(symbol, db),
detail: types_analyzer::extract_global_type(db, &symbol.green).map(|ty| {
if mutability::get_mutabilities(db, document)
.get(&symbol.key)
.and_then(|mutability| mutability.mut_keyword)
.is_some()
{
format!("(mut {})", ty.render(db))
} else {
ty.render(db).to_string()
}
}),
kind: LspSymbolKind::Variable,
tags,
range,
selection_range,
children: None,
},
))
}
SymbolKind::MemoryDef
| SymbolKind::TableDef
| SymbolKind::TagDef
| SymbolKind::DataDef
| SymbolKind::ElemDef => {
let range = line_index.convert(symbol.key.text_range());
Some((
symbol.key,
DocumentSymbol {
name: render_symbol_name(symbol, db),
detail: None,
kind: LspSymbolKind::Variable,
tags,
range,
selection_range,
children: None,
},
))
}
SymbolKind::FieldDef => {
let range = line_index.convert(symbol.key.text_range());
Some((
symbol.key,
DocumentSymbol {
name: render_symbol_name(symbol, db),
detail: types_analyzer::resolve_field_type(db, document, symbol.key, symbol.region)
.map(|ty| ty.render(db).to_string()),
kind: LspSymbolKind::Field,
tags,
range,
selection_range,
children: None,
},
))
}
SymbolKind::Param
| SymbolKind::Call
| SymbolKind::LocalRef
| SymbolKind::TypeUse
| SymbolKind::GlobalRef
| SymbolKind::MemoryRef
| SymbolKind::TableRef
| SymbolKind::BlockDef
| SymbolKind::BlockRef
| SymbolKind::FieldRef
| SymbolKind::TagRef
| SymbolKind::DataRef
| SymbolKind::ElemRef => None,
}
})
.collect::<FxHashMap<_, _>>();
symbol_table
.symbols
.values()
.filter(|symbol| symbol.region.kind() != SyntaxKind::ROOT)
.rev()
.for_each(|symbol| {
if let Some((mut lsp_symbol, parent)) =
symbols_map.remove(&symbol.key).zip(symbols_map.get_mut(&symbol.region))
{
if let Some(children) = &mut lsp_symbol.children {
children.sort_unstable_by_key(|symbol| symbol.range.start);
}
parent
.children
.get_or_insert_with(|| Vec::with_capacity(1))
.push(lsp_symbol);
}
});
let mut lsp_symbols = symbols_map
.into_values()
.filter_map(|mut lsp_symbol| {
if let Some(children) = &mut lsp_symbol.children {
children.sort_unstable_by_key(|symbol| symbol.range.start);
Some(lsp_symbol)
} else {
None
}
})
.collect::<Vec<_>>();
lsp_symbols.sort_unstable_by_key(|symbol| symbol.range.start);
lsp_symbols
})
}
}
fn render_symbol_name(symbol: &Symbol, db: &dyn salsa::Database) -> String {
if let Some(name) = symbol.idx.name {
name.ident(db).to_string()
} else if let Some(num) = symbol.idx.num {
format!("{} {num}", symbol.kind)
} else {
String::new()
}
}