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use crate::{
LanguageService,
binder::{SymbolKind, SymbolTable},
helpers,
idx::Idx,
types_analyzer,
};
use lspt::{InlayHint, InlayHintKind, InlayHintParams, Union2};
use rowan::ast::support;
use wat_syntax::SyntaxKind;
impl LanguageService {
/// Handler for `textDocument/inlayHint` request.
pub fn inlay_hint(&self, params: InlayHintParams) -> Option<Vec<InlayHint>> {
let document = self.get_document(params.text_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 config_state = self.configs.get(&document.uri(self))?;
let config = config_state.get_or_global(self);
let line_index = document.line_index(self);
let root = document.root_tree(self);
let symbol_table = SymbolTable::of(self, document);
let options = &config.inlay_hint;
let range = helpers::lsp_range_to_rowan_range(line_index, 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(self, document, local.green.clone())
})
{
inlay_hints.push(InlayHint {
position: helpers::rowan_pos_to_lsp_pos(
line_index,
symbol.key.text_range().end(),
),
label: Union2::A(ty.render(self).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(
self,
document,
global.green.clone(),
)
})
{
inlay_hints.push(InlayHint {
position: helpers::rowan_pos_to_lsp_pos(
line_index,
symbol.key.text_range().end(),
),
label: Union2::A(ty.render(self).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
.key
.to_node(&root)
.last_child_or_token()
.map(|last| last.text_range())
.filter(|last| range.contains_range(*last))
.zip(symbol.idx.name)
{
inlay_hints.push(InlayHint {
position: helpers::rowan_pos_to_lsp_pos(line_index, last.end()),
label: Union2::A(format!("(func {})", name.ident(self))),
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(keyword) =
support::token(&symbol.key.to_node(&root), SyntaxKind::KEYWORD)
{
inlay_hints.push(InlayHint {
position: helpers::rowan_pos_to_lsp_pos(
line_index,
keyword.text_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
.key
.to_node(&root)
.last_child_or_token()
.map(|last| last.text_range())
.filter(|last| range.contains_range(*last))
.zip(symbol.idx.name)
{
inlay_hints.push(InlayHint {
position: helpers::rowan_pos_to_lsp_pos(line_index, 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(self),
)),
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 => {
if options.index
&& let Idx {
num: Some(num),
name: None,
} = symbol.idx
&& let Some(keyword) =
support::token(&symbol.key.to_node(&root), SyntaxKind::KEYWORD)
{
inlay_hints.push(InlayHint {
position: helpers::rowan_pos_to_lsp_pos(
line_index,
keyword.text_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 = support::token(&symbol.key.to_node(&root), SyntaxKind::KEYWORD)
.filter(|token| matches!(token.text(), "param" | "local" | "field"))
.map(|token| token.text_range().end())
.unwrap_or_else(|| symbol.key.text_range().end());
inlay_hints.push(InlayHint {
position: helpers::rowan_pos_to_lsp_pos(line_index, 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(
self,
document,
symbol.key,
symbol.region,
)
{
inlay_hints.push(InlayHint {
position: helpers::rowan_pos_to_lsp_pos(
line_index,
symbol.key.text_range().end(),
),
label: Union2::A(ty.render(self).to_string()),
kind: Some(InlayHintKind::Type),
text_edits: None,
tooltip: None,
padding_left: Some(true),
padding_right: None,
data: None,
});
}
}
_ => {}
}
}
Some(inlay_hints)
}
}