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use crate::{
binder::{SymbolItemKind, SymbolTablesCtx},
files::FilesCtx,
helpers,
idx::IdentsCtx,
LanguageService,
};
use lsp_types::{DocumentSymbol, DocumentSymbolParams, DocumentSymbolResponse, SymbolKind};
use rowan::ast::support::token;
use rustc_hash::FxHashMap;
use wat_syntax::{SyntaxKind, SyntaxNode};
impl LanguageService {
/// Handler for `textDocument/documentSymbol` request.
pub fn document_symbol(&self, params: DocumentSymbolParams) -> Option<DocumentSymbolResponse> {
let uri = self.uri(params.text_document.uri);
let line_index = self.line_index(uri);
let root = SyntaxNode::new_root(self.root(uri));
let symbol_table = self.symbol_table(uri);
#[expect(deprecated)]
let mut symbols_map = symbol_table
.symbols
.iter()
.filter_map(|symbol| match &symbol.kind {
SymbolItemKind::Module => {
let module_range =
helpers::rowan_range_to_lsp_range(&line_index, symbol.key.text_range());
Some((
symbol.key,
DocumentSymbol {
name: "module".into(),
detail: None,
kind: SymbolKind::MODULE,
tags: None,
deprecated: None,
range: module_range,
selection_range: module_range,
children: None,
},
))
}
SymbolItemKind::Func => {
let range =
helpers::rowan_range_to_lsp_range(&line_index, symbol.key.text_range());
Some((
symbol.key,
DocumentSymbol {
name: symbol
.idx
.name
.map(|name| self.lookup_ident(name))
.or_else(|| symbol.idx.num.map(|num| num.to_string()))
.unwrap_or_default(),
detail: None,
kind: SymbolKind::FUNCTION,
tags: None,
deprecated: None,
range,
selection_range: token(&symbol.key.to_node(&root), SyntaxKind::IDENT)
.map(|token| {
helpers::rowan_range_to_lsp_range(
&line_index,
token.text_range(),
)
})
.unwrap_or(range),
children: None,
},
))
}
SymbolItemKind::Local => {
let range =
helpers::rowan_range_to_lsp_range(&line_index, symbol.key.text_range());
Some((
symbol.key,
DocumentSymbol {
name: symbol
.idx
.name
.map(|name| self.lookup_ident(name))
.or_else(|| symbol.idx.num.map(|num| num.to_string()))
.unwrap_or_default(),
detail: None,
kind: SymbolKind::VARIABLE,
tags: None,
deprecated: None,
range,
selection_range: token(&symbol.key.to_node(&root), SyntaxKind::IDENT)
.map(|token| {
helpers::rowan_range_to_lsp_range(
&line_index,
token.text_range(),
)
})
.unwrap_or(range),
children: None,
},
))
}
SymbolItemKind::Type
| SymbolItemKind::GlobalDef
| SymbolItemKind::MemoryDef
| SymbolItemKind::TableDef => {
let range =
helpers::rowan_range_to_lsp_range(&line_index, symbol.key.text_range());
Some((
symbol.key,
DocumentSymbol {
name: symbol
.idx
.name
.map(|name| self.lookup_ident(name))
.or_else(|| symbol.idx.num.map(|num| num.to_string()))
.unwrap_or_default(),
detail: None,
kind: SymbolKind::VARIABLE,
tags: None,
deprecated: None,
range,
selection_range: token(&symbol.key.to_node(&root), SyntaxKind::IDENT)
.map(|token| {
helpers::rowan_range_to_lsp_range(
&line_index,
token.text_range(),
)
})
.unwrap_or(range),
children: None,
},
))
}
SymbolItemKind::Param
| SymbolItemKind::Call
| SymbolItemKind::LocalRef
| SymbolItemKind::TypeUse
| SymbolItemKind::GlobalRef
| SymbolItemKind::MemoryRef
| SymbolItemKind::TableRef
| SymbolItemKind::BlockDef
| SymbolItemKind::BlockRef => None,
})
.collect::<FxHashMap<_, _>>();
symbol_table
.symbols
.iter()
.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.reverse();
}
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.reverse();
Some(lsp_symbol)
} else {
None
}
})
.collect::<Vec<_>>();
lsp_symbols.reverse();
Some(DocumentSymbolResponse::Nested(lsp_symbols))
}
}