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use crate::{
LanguageService,
binder::{Symbol, SymbolKind, SymbolTable},
deprecation, helpers, types_analyzer,
};
use lspt::{DocumentSymbol, DocumentSymbolParams, SymbolKind as LspSymbolKind, SymbolTag};
use rowan::ast::AstNode;
use rustc_hash::FxHashMap;
use wat_syntax::{SyntaxKind, ast::ModuleFieldGlobal};
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)?;
let line_index = document.line_index(self);
let root = document.root_tree(self);
let symbol_table = SymbolTable::of(self, document);
let deprecation = deprecation::get_deprecation(self, document);
#[expect(deprecated)]
let mut symbols_map = symbol_table
.symbols
.values()
.filter_map(|symbol| {
let range = helpers::rowan_range_to_lsp_range(line_index, symbol.key.text_range());
let selection_range = helpers::create_selection_range(symbol, &root, line_index);
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,
deprecated: None,
range,
selection_range,
children: None,
},
)),
SymbolKind::Func => {
let range =
helpers::rowan_range_to_lsp_range(line_index, symbol.key.text_range());
Some((
symbol.key,
DocumentSymbol {
name: render_symbol_name(symbol, self),
detail: None,
kind: LspSymbolKind::Function,
tags,
deprecated: None,
range,
selection_range,
children: None,
},
))
}
SymbolKind::Local => {
let range =
helpers::rowan_range_to_lsp_range(line_index, symbol.key.text_range());
Some((
symbol.key,
DocumentSymbol {
name: render_symbol_name(symbol, self),
detail: types_analyzer::extract_type(
self,
document,
symbol.green.clone(),
)
.map(|ty| ty.render(self).to_string()),
kind: LspSymbolKind::Variable,
tags,
deprecated: None,
range,
selection_range,
children: None,
},
))
}
SymbolKind::Type => {
let range =
helpers::rowan_range_to_lsp_range(line_index, symbol.key.text_range());
Some((
symbol.key,
DocumentSymbol {
name: render_symbol_name(symbol, self),
detail: helpers::infer_type_def_symbol_detail(symbol, &root),
kind: LspSymbolKind::Class,
tags,
deprecated: None,
range,
selection_range,
children: None,
},
))
}
SymbolKind::GlobalDef => {
let range =
helpers::rowan_range_to_lsp_range(line_index, symbol.key.text_range());
Some((
symbol.key,
DocumentSymbol {
name: render_symbol_name(symbol, self),
detail: types_analyzer::extract_global_type(
self,
document,
symbol.green.clone(),
)
.map(|ty| {
if ModuleFieldGlobal::cast(symbol.key.to_node(&root))
.and_then(|global| global.global_type())
.and_then(|global_type| global_type.mut_keyword())
.is_some()
{
format!("(mut {})", ty.render(self))
} else {
ty.render(self).to_string()
}
}),
kind: LspSymbolKind::Variable,
tags,
deprecated: None,
range,
selection_range,
children: None,
},
))
}
SymbolKind::MemoryDef | SymbolKind::TableDef | SymbolKind::TagDef => {
let range =
helpers::rowan_range_to_lsp_range(line_index, symbol.key.text_range());
Some((
symbol.key,
DocumentSymbol {
name: render_symbol_name(symbol, self),
detail: None,
kind: LspSymbolKind::Variable,
tags,
deprecated: None,
range,
selection_range,
children: None,
},
))
}
SymbolKind::FieldDef => {
let range =
helpers::rowan_range_to_lsp_range(line_index, symbol.key.text_range());
Some((
symbol.key,
DocumentSymbol {
name: render_symbol_name(symbol, self),
detail: types_analyzer::resolve_field_type(
self,
document,
symbol.key,
symbol.region,
)
.map(|ty| ty.render(self).to_string()),
kind: LspSymbolKind::Field,
tags,
deprecated: None,
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 => 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_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_by_key(|symbol| symbol.range.start);
Some(lsp_symbol)
} else {
None
}
})
.collect::<Vec<_>>();
lsp_symbols.sort_by_key(|symbol| symbol.range.start);
Some(lsp_symbols)
}
}
fn render_symbol_name(symbol: &Symbol, service: &LanguageService) -> String {
if let Some(name) = symbol.idx.name {
name.ident(service).to_string()
} else if let Some(num) = symbol.idx.num {
format!("{} {num}", symbol.kind)
} else {
String::new()
}
}