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|
use ra_db::{FileId, Cancelable};
use ra_syntax::{
SyntaxNode, AstNode, SmolStr, TextRange, ast,
SyntaxKind::{self, NAME},
};
use hir::{Def, ModuleSource};
use crate::{FileSymbol, db::RootDatabase};
/// `NavigationTarget` represents and element in the editor's UI which you can
/// click on to navigate to a particular piece of code.
///
/// Typically, a `NavigationTarget` corresponds to some element in the source
/// code, like a function or a struct, but this is not strictly required.
#[derive(Debug, Clone)]
pub struct NavigationTarget {
file_id: FileId,
name: SmolStr,
kind: SyntaxKind,
full_range: TextRange,
focus_range: Option<TextRange>,
}
impl NavigationTarget {
pub fn name(&self) -> &SmolStr {
&self.name
}
pub fn kind(&self) -> SyntaxKind {
self.kind
}
pub fn file_id(&self) -> FileId {
self.file_id
}
pub fn full_range(&self) -> TextRange {
self.full_range
}
/// A "most interesting" range withing the `range_full`.
///
/// Typically, `range` is the whole syntax node, including doc comments, and
/// `focus_range` is the range of the identifier.
pub fn focus_range(&self) -> Option<TextRange> {
self.focus_range
}
pub(crate) fn from_symbol(symbol: FileSymbol) -> NavigationTarget {
NavigationTarget {
file_id: symbol.file_id,
name: symbol.name.clone(),
kind: symbol.ptr.kind(),
full_range: symbol.ptr.range(),
focus_range: None,
}
}
pub(crate) fn from_scope_entry(
file_id: FileId,
entry: &hir::ScopeEntryWithSyntax,
) -> NavigationTarget {
NavigationTarget {
file_id,
name: entry.name().to_string().into(),
full_range: entry.ptr().range(),
focus_range: None,
kind: NAME,
}
}
pub(crate) fn from_module(
db: &RootDatabase,
module: hir::Module,
) -> Cancelable<NavigationTarget> {
let (file_id, source) = module.definition_source(db);
let name = module
.name(db)
.map(|it| it.to_string().into())
.unwrap_or_default();
let res = match source {
ModuleSource::SourceFile(node) => {
NavigationTarget::from_syntax(file_id, name, None, node.syntax())
}
ModuleSource::Module(node) => {
NavigationTarget::from_syntax(file_id, name, None, node.syntax())
}
};
Ok(res)
}
pub(crate) fn from_module_to_decl(
db: &RootDatabase,
module: hir::Module,
) -> Cancelable<NavigationTarget> {
let name = module
.name(db)
.map(|it| it.to_string().into())
.unwrap_or_default();
if let Some((file_id, source)) = module.declaration_source(db) {
return Ok(NavigationTarget::from_syntax(
file_id,
name,
None,
source.syntax(),
));
}
NavigationTarget::from_module(db, module)
}
// TODO once Def::Item is gone, this should be able to always return a NavigationTarget
pub(crate) fn from_def(db: &RootDatabase, def: Def) -> Cancelable<Option<NavigationTarget>> {
let res = match def {
Def::Struct(s) => {
let (file_id, node) = s.source(db)?;
NavigationTarget::from_named(file_id.original_file(db), &*node)
}
Def::Enum(e) => {
let (file_id, node) = e.source(db)?;
NavigationTarget::from_named(file_id.original_file(db), &*node)
}
Def::EnumVariant(ev) => {
let (file_id, node) = ev.source(db)?;
NavigationTarget::from_named(file_id.original_file(db), &*node)
}
Def::Function(f) => {
let (file_id, node) = f.source(db)?;
NavigationTarget::from_named(file_id.original_file(db), &*node)
}
Def::Trait(f) => {
let (file_id, node) = f.source(db)?;
NavigationTarget::from_named(file_id.original_file(db), &*node)
}
Def::Type(f) => {
let (file_id, node) = f.source(db)?;
NavigationTarget::from_named(file_id.original_file(db), &*node)
}
Def::Static(f) => {
let (file_id, node) = f.source(db)?;
NavigationTarget::from_named(file_id.original_file(db), &*node)
}
Def::Const(f) => {
let (file_id, node) = f.source(db)?;
NavigationTarget::from_named(file_id.original_file(db), &*node)
}
Def::Module(m) => NavigationTarget::from_module(db, m)?,
Def::Item => return Ok(None),
};
Ok(Some(res))
}
#[cfg(test)]
pub(crate) fn assert_match(&self, expected: &str) {
let actual = self.debug_render();
test_utils::assert_eq_text!(expected.trim(), actual.trim(),);
}
#[cfg(test)]
pub(crate) fn debug_render(&self) -> String {
let mut buf = format!(
"{} {:?} {:?} {:?}",
self.name(),
self.kind(),
self.file_id(),
self.full_range()
);
if let Some(focus_range) = self.focus_range() {
buf.push_str(&format!(" {:?}", focus_range))
}
buf
}
fn from_named(file_id: FileId, node: &impl ast::NameOwner) -> NavigationTarget {
let name = node.name().map(|it| it.text().clone()).unwrap_or_default();
let focus_range = node.name().map(|it| it.syntax().range());
NavigationTarget::from_syntax(file_id, name, focus_range, node.syntax())
}
fn from_syntax(
file_id: FileId,
name: SmolStr,
focus_range: Option<TextRange>,
node: &SyntaxNode,
) -> NavigationTarget {
NavigationTarget {
file_id,
name,
kind: node.kind(),
full_range: node.range(),
focus_range,
// ptr: Some(LocalSyntaxPtr::new(node)),
}
}
}
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