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feat: Add the hover_range capability

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Alexander Gonzalez 2021-07-24 21:54:48 -04:00
parent 20c64cc0e6
commit 8ca3bb8fcd
2 changed files with 29 additions and 6 deletions
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28
crates/ide/src/hover.rs
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@ -1,7 +1,7 @@
use either::Either;
use hir::{AsAssocItem, HasAttrs, HasSource, HirDisplay, Semantics};
use ide_db::{
base_db::SourceDatabase,
base_db::{FileRange, SourceDatabase},
defs::{Definition, NameClass, NameRefClass},
helpers::{
generated_lints::{CLIPPY_LINTS, DEFAULT_LINTS, FEATURES},
@ -12,8 +12,12 @@ use ide_db::{
use itertools::Itertools;
use stdx::format_to;
use syntax::{
algo, ast, display::fn_as_proc_macro_label, match_ast, AstNode, AstToken, Direction,
SyntaxKind::*, SyntaxToken, T,
algo::{self, find_node_at_range},
ast,
display::fn_as_proc_macro_label,
match_ast, AstNode, AstToken, Direction,
SyntaxKind::*,
SyntaxToken, T,
};
use crate::{
@ -246,6 +250,24 @@ pub(crate) fn hover_range(
range: FileRange,
config: &HoverConfig,
) -> Option<RangeInfo<HoverResult>> {
let sema = hir::Semantics::new(db);
let file = sema.parse(range.file_id).syntax().clone();
let expr = find_node_at_range::<ast::Expr>(&file, range.range)?;
let ty = sema.type_of_expr(&expr)?;
if ty.is_unknown() {
return None;
}
let mut res = HoverResult::default();
res.markup = if config.markdown() {
Markup::fenced_block(&ty.display(db))
} else {
ty.display(db).to_string().into()
};
Some(RangeInfo::new(range.range, res))
}
fn show_implementations_action(db: &RootDatabase, def: Definition) -> Option<HoverAction> {