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use crate::{
LanguageService,
binder::{SymbolKind, SymbolTable},
helpers::LineIndexExt,
idx::Idx,
types_analyzer,
uri::InternUri,
};
use lspt::{InlayHint, InlayHintKind, InlayHintParams, Union2};
use wat_syntax::SyntaxKind;
impl LanguageService {
/// Handler for `textDocument/inlayHint` request.
pub fn inlay_hint(&self, params: InlayHintParams) -> Option<Vec<InlayHint>> {
let uri = InternUri::new(self, params.text_document.uri);
let document = self.get_document(uri)?;
// Avoid inlay hints flickering if client supports pulling config and config is not ready.
// This is similar to what we do in the checker.
let configs = self.configs.read();
let config = configs.get(&uri)?.unwrap_or_global(self);
self.with_db(|db| {
let line_index = document.line_index(db);
let symbol_table = SymbolTable::of(db, document);
let options = &config.inlay_hint;
let range = line_index.convert(params.range)?;
let mut inlay_hints = Vec::new();
for symbol in symbol_table.symbols.values() {
match symbol.kind {
SymbolKind::LocalRef => {
if options.types
&& range.contains_range(symbol.key.text_range())
&& let Some(ty) = symbol_table
.find_def(symbol.key)
.and_then(|local| types_analyzer::extract_type(db, &local.green))
{
inlay_hints.push(InlayHint {
position: line_index.convert(symbol.key.text_range().end()),
label: Union2::A(ty.render(db).to_string()),
kind: Some(InlayHintKind::Type),
text_edits: None,
tooltip: None,
padding_left: Some(true),
padding_right: None,
data: None,
});
}
}
SymbolKind::GlobalRef => {
if options.types
&& range.contains_range(symbol.key.text_range())
&& let Some(ty) = symbol_table
.find_def(symbol.key)
.and_then(|global| types_analyzer::extract_global_type(db, &global.green))
{
inlay_hints.push(InlayHint {
position: line_index.convert(symbol.key.text_range().end()),
label: Union2::A(ty.render(db).to_string()),
kind: Some(InlayHintKind::Type),
text_edits: None,
tooltip: None,
padding_left: Some(true),
padding_right: None,
data: None,
});
}
}
SymbolKind::Func => {
if options.ending
&& let Some((last, name)) = symbol
.amber()
.children_with_tokens()
.next_back()
.map(|last| last.text_range())
.filter(|last| range.contains_range(*last))
.zip(symbol.idx.name)
{
inlay_hints.push(InlayHint {
position: line_index.convert(last.end()),
label: Union2::A(format!("(func {})", name.ident(db))),
kind: None,
text_edits: None,
tooltip: None,
padding_left: Some(true),
padding_right: None,
data: None,
});
}
if options.index
&& let Idx {
num: Some(num),
name: None,
} = symbol.idx
&& let Some(range) = symbol_table.def_poi.get(&symbol.key)
{
inlay_hints.push(InlayHint {
position: line_index.convert(range.end()),
label: Union2::A(format!("(;{num};)")),
kind: None,
text_edits: None,
tooltip: None,
padding_left: Some(true),
padding_right: None,
data: None,
});
}
}
SymbolKind::BlockDef => {
if options.ending
&& let Some((last, name)) = symbol
.amber()
.children_with_tokens()
.next_back()
.map(|last| last.text_range())
.filter(|last| range.contains_range(*last))
.zip(symbol.idx.name)
{
inlay_hints.push(InlayHint {
position: line_index.convert(last.end()),
label: Union2::A(format!(
"({} {})",
match symbol.key.kind() {
SyntaxKind::BLOCK_IF => "if",
SyntaxKind::BLOCK_LOOP => "loop",
SyntaxKind::BLOCK_TRY_TABLE => "try_table",
_ => "block",
},
name.ident(db),
)),
kind: None,
text_edits: None,
tooltip: None,
padding_left: Some(true),
padding_right: None,
data: None,
});
}
}
SymbolKind::Type
| SymbolKind::GlobalDef
| SymbolKind::MemoryDef
| SymbolKind::TableDef
| SymbolKind::TagDef
| SymbolKind::DataDef
| SymbolKind::ElemDef => {
if options.index
&& let Idx {
num: Some(num),
name: None,
} = symbol.idx
&& let Some(range) = symbol_table.def_poi.get(&symbol.key)
{
inlay_hints.push(InlayHint {
position: line_index.convert(range.end()),
label: Union2::A(format!("(;{num};)")),
kind: None,
text_edits: None,
tooltip: None,
padding_left: Some(true),
padding_right: None,
data: None,
});
}
}
SymbolKind::Param | SymbolKind::Local | SymbolKind::FieldDef => {
if options.index
&& let Idx {
num: Some(num),
name: None,
} = symbol.idx
{
let end = symbol
.amber()
.tokens_by_kind(SyntaxKind::KEYWORD)
.find_map(|token| {
if matches!(token.text(), "param" | "local" | "field") {
Some(token.text_range().end())
} else {
None
}
})
.unwrap_or_else(|| symbol.key.text_range().end());
inlay_hints.push(InlayHint {
position: line_index.convert(end),
label: Union2::A(format!("(;{num};)")),
kind: None,
text_edits: None,
tooltip: None,
padding_left: Some(true),
padding_right: None,
data: None,
});
}
}
SymbolKind::FieldRef => {
if options.types
&& range.contains_range(symbol.key.text_range())
&& let Some(ty) =
types_analyzer::resolve_field_type(db, document, symbol.key, symbol.region)
{
inlay_hints.push(InlayHint {
position: line_index.convert(symbol.key.text_range().end()),
label: Union2::A(ty.render(db).to_string()),
kind: Some(InlayHintKind::Type),
text_edits: None,
tooltip: None,
padding_left: Some(true),
padding_right: None,
data: None,
});
}
}
_ => {}
}
}
Some(inlay_hints)
})
.flatten()
}
}