5 files changed, 49 insertions, 73 deletions

diff --git a/crates/ide/src/display/navigation_target.rs b/crates/ide/src/display/navigation_target.rs
index 685052e7f..00e601244 100644
--- a/crates/ide/src/display/navigation_target.rs
+++ b/crates/ide/src/display/navigation_target.rs
@@ -400,15 +400,13 @@ impl TryToNav for hir::GenericParam {
 impl ToNav for hir::Local {
     fn to_nav(&self, db: &RootDatabase) -> NavigationTarget {
         let src = self.source(db);
-        let (node, focus_range) = match &src.value {
-            Either::Left(bind_pat) => (
-                bind_pat.syntax().clone(),
-                bind_pat
-                    .name()
-                    .map(|it| src.with_value(&it.syntax().clone()).original_file_range(db).range),
-            ),
-            Either::Right(it) => (it.syntax().clone(), it.self_token().map(|it| it.text_range())),
+        let (node, name) = match &src.value {
+            Either::Left(bind_pat) => (bind_pat.syntax().clone(), bind_pat.name()),
+            Either::Right(it) => (it.syntax().clone(), it.name()),
         };
+        let focus_range =
+            name.map(|it| src.with_value(&it.syntax().clone()).original_file_range(db).range);
+
         let full_range = src.with_value(&node).original_file_range(db);
         let name = match self.name(db) {
             Some(it) => it.to_string().into(),
diff --git a/crates/ide/src/goto_definition.rs b/crates/ide/src/goto_definition.rs
index 988a5668f..a1d2bce1d 100644
--- a/crates/ide/src/goto_definition.rs
+++ b/crates/ide/src/goto_definition.rs
@@ -55,11 +55,6 @@ pub(crate) fn goto_definition(
             } else {
                 reference_definition(&sema, Either::Left(&lt)).to_vec()
             },
-            ast::SelfParam(self_param) => {
-                let def = NameClass::classify_self_param(&sema, &self_param)?.referenced_or_defined(sema.db);
-                let nav = def.try_to_nav(sema.db)?;
-                vec![nav]
-            },
             _ => return None,
         }
     };
diff --git a/crates/ide/src/hover.rs b/crates/ide/src/hover.rs
index 6022bd275..2024acd94 100644
--- a/crates/ide/src/hover.rs
+++ b/crates/ide/src/hover.rs
@@ -98,7 +98,6 @@ pub(crate) fn hover(
             ast::NameRef(name_ref) => NameRefClass::classify(&sema, &name_ref).map(|d| d.referenced(sema.db)),
             ast::Lifetime(lifetime) => NameClass::classify_lifetime(&sema, &lifetime)
                 .map_or_else(|| NameRefClass::classify_lifetime(&sema, &lifetime).map(|d| d.referenced(sema.db)), |d| d.defined(sema.db)),
-            ast::SelfParam(self_param) => NameClass::classify_self_param(&sema, &self_param).and_then(|d| d.defined(sema.db)),
             _ => None,
         }
     };
@@ -3223,7 +3222,7 @@ impl Foo {
 }
 "#,
             expect![[r#"
-                *&self*
+                *self*
 
                 ```rust
                 &Foo
@@ -3243,7 +3242,7 @@ impl Foo {
 }
 "#,
             expect![[r#"
-                *self: Arc<Foo>*
+                *self*
 
                 ```rust
                 Arc<Foo>
diff --git a/crates/ide/src/references/rename.rs b/crates/ide/src/references/rename.rs
index 9ac4af026..4df189c98 100644
--- a/crates/ide/src/references/rename.rs
+++ b/crates/ide/src/references/rename.rs
@@ -1,12 +1,9 @@
 //! FIXME: write short doc here
-use std::{
-    convert::TryInto,
-    fmt::{self, Display},
-};
+use std::fmt::{self, Display};
 
 use hir::{Module, ModuleDef, ModuleSource, Semantics};
 use ide_db::{
-    base_db::{AnchoredPathBuf, FileId, FileRange, SourceDatabaseExt},
+    base_db::{AnchoredPathBuf, FileId, FileRange},
     defs::{Definition, NameClass, NameRefClass},
     search::FileReference,
     RootDatabase,
@@ -14,14 +11,14 @@ use ide_db::{
 use syntax::{
     algo::find_node_at_offset,
     ast::{self, NameOwner},
-    lex_single_syntax_kind, match_ast, AstNode, SyntaxKind, SyntaxNode, SyntaxToken, T,
+    lex_single_syntax_kind, match_ast, AstNode, SyntaxKind, SyntaxNode, T,
 };
 use test_utils::mark;
 use text_edit::TextEdit;
 
 use crate::{
     FilePosition, FileSystemEdit, RangeInfo, ReferenceKind, ReferenceSearchResult, SourceChange,
-    TextRange, TextSize,
+    TextRange,
 };
 
 type RenameResult<T> = Result<T, RenameError>;
@@ -52,10 +49,6 @@ pub(crate) fn prepare_rename(
     let syntax = source_file.syntax();
     if let Some(module) = find_module_at_offset(&sema, position, syntax) {
         rename_mod(&sema, position, module, "dummy")
-    } else if let Some(self_token) =
-        syntax.token_at_offset(position.offset).find(|t| t.kind() == T![self])
-    {
-        rename_self_to_param(&sema, position, self_token, "dummy")
     } else {
         let RangeInfo { range, .. } = find_all_refs(&sema, position)?;
         Ok(RangeInfo::new(range, SourceChange::default()))
@@ -82,10 +75,6 @@ pub(crate) fn rename_with_semantics(
 
     if let Some(module) = find_module_at_offset(&sema, position, syntax) {
         rename_mod(&sema, position, module, new_name)
-    } else if let Some(self_token) =
-        syntax.token_at_offset(position.offset).find(|t| t.kind() == T![self])
-    {
-        rename_self_to_param(&sema, position, self_token, new_name)
     } else {
         rename_reference(&sema, position, new_name)
     }
@@ -108,7 +97,7 @@ pub(crate) fn will_rename_file(
     Some(change)
 }
 
-#[derive(Debug, PartialEq)]
+#[derive(Copy, Clone, Debug, PartialEq)]
 enum IdentifierKind {
     Ident,
     Lifetime,
@@ -375,53 +364,50 @@ fn text_edit_from_self_param(
 fn rename_self_to_param(
     sema: &Semantics<RootDatabase>,
     position: FilePosition,
-    self_token: SyntaxToken,
     new_name: &str,
+    ident_kind: IdentifierKind,
+    range: TextRange,
+    refs: ReferenceSearchResult,
 ) -> Result<RangeInfo<SourceChange>, RenameError> {
-    let ident_kind = check_identifier(new_name)?;
     match ident_kind {
         IdentifierKind::Lifetime => bail!("Invalid name `{}`: not an identifier", new_name),
         IdentifierKind::ToSelf => {
             // no-op
             mark::hit!(rename_self_to_self);
-            return Ok(RangeInfo::new(self_token.text_range(), SourceChange::default()));
+            return Ok(RangeInfo::new(range, SourceChange::default()));
         }
         _ => (),
     }
     let source_file = sema.parse(position.file_id);
     let syn = source_file.syntax();
 
-    let text = sema.db.file_text(position.file_id);
     let fn_def = find_node_at_offset::<ast::Fn>(syn, position.offset)
         .ok_or_else(|| format_err!("No surrounding method declaration found"))?;
-    let search_range = fn_def.syntax().text_range();
 
     let mut source_change = SourceChange::default();
-
-    for (idx, _) in text.match_indices("self") {
-        let offset: TextSize = idx.try_into().unwrap();
-        if !search_range.contains_inclusive(offset) {
-            continue;
-        }
-        if let Some(ref usage) = syn.token_at_offset(offset).find(|t| t.kind() == T![self]) {
-            let edit = if let Some(ref self_param) = ast::SelfParam::cast(usage.parent()) {
-                text_edit_from_self_param(syn, self_param, new_name)
-                    .ok_or_else(|| format_err!("No target type found"))?
-            } else {
-                TextEdit::replace(usage.text_range(), String::from(new_name))
-            };
+    if let Some(self_param) = fn_def.param_list().and_then(|it| it.self_param()) {
+        if self_param
+            .syntax()
+            .text_range()
+            .contains_range(refs.declaration().nav.focus_or_full_range())
+        {
+            let edit = text_edit_from_self_param(syn, &self_param, new_name)
+                .ok_or_else(|| format_err!("No target type found"))?;
             source_change.insert_source_edit(position.file_id, edit);
-        }
-    }
 
-    if source_change.source_file_edits.len() > 1 && ident_kind == IdentifierKind::Underscore {
-        bail!("Cannot rename reference to `_` as it is being referenced multiple times");
-    }
+            source_change.extend(refs.references().iter().map(|(&file_id, references)| {
+                source_edit_from_references(sema, file_id, &references, new_name)
+            }));
 
-    let range = ast::SelfParam::cast(self_token.parent())
-        .map_or(self_token.text_range(), |p| p.syntax().text_range());
+            if source_change.source_file_edits.len() > 1 && ident_kind == IdentifierKind::Underscore
+            {
+                bail!("Cannot rename reference to `_` as it is being referenced multiple times");
+            }
 
-    Ok(RangeInfo::new(range, source_change))
+            return Ok(RangeInfo::new(range, source_change));
+        }
+    }
+    Err(format_err!("Method has no self param"))
 }
 
 fn rename_reference(
@@ -444,8 +430,9 @@ fn rename_reference(
             mark::hit!(rename_not_an_ident_ref);
             bail!("Invalid name `{}`: not an identifier", new_name)
         }
-        (IdentifierKind::ToSelf, ReferenceKind::SelfParam) => {
-            unreachable!("rename_self_to_param should've been called instead")
+        (_, ReferenceKind::SelfParam) => {
+            mark::hit!(rename_self_to_param);
+            return rename_self_to_param(sema, position, new_name, ident_kind, range, refs);
         }
         (IdentifierKind::ToSelf, _) => {
             mark::hit!(rename_to_self);
@@ -1350,6 +1337,7 @@ impl Foo {
 
     #[test]
     fn test_owned_self_to_parameter() {
+        mark::check!(rename_self_to_param);
         check(
             "foo",
             r#"
diff --git a/crates/ide/src/syntax_highlighting/highlight.rs b/crates/ide/src/syntax_highlighting/highlight.rs
index 87578e70a..8625ef5df 100644
--- a/crates/ide/src/syntax_highlighting/highlight.rs
+++ b/crates/ide/src/syntax_highlighting/highlight.rs
@@ -68,7 +68,8 @@ pub(super) fn element(
         NAME_REF => {
             let name_ref = element.into_node().and_then(ast::NameRef::cast).unwrap();
             highlight_func_by_name_ref(sema, &name_ref).unwrap_or_else(|| {
-                match NameRefClass::classify(sema, &name_ref) {
+                let is_self = name_ref.self_token().is_some();
+                let h = match NameRefClass::classify(sema, &name_ref) {
                     Some(name_kind) => match name_kind {
                         NameRefClass::ExternCrate(_) => HlTag::Symbol(SymbolKind::Module).into(),
                         NameRefClass::Definition(def) => {
@@ -108,6 +109,11 @@ pub(super) fn element(
                         highlight_name_ref_by_syntax(name_ref, sema)
                     }
                     None => HlTag::UnresolvedReference.into(),
+                };
+                if h.tag == HlTag::Symbol(SymbolKind::Module) && is_self {
+                    HlTag::Symbol(SymbolKind::SelfParam).into()
+                } else {
+                    h
                 }
             })
         }
@@ -225,18 +231,8 @@ pub(super) fn element(
                 T![for] if !is_child_of_impl(&element) => h | HlMod::ControlFlow,
                 T![unsafe] => h | HlMod::Unsafe,
                 T![true] | T![false] => HlTag::BoolLiteral.into(),
-                T![self] => {
-                    let self_param = element.parent().and_then(ast::SelfParam::cast);
-                    if let Some(NameClass::Definition(def)) = self_param
-                        .and_then(|self_param| NameClass::classify_self_param(sema, &self_param))
-                    {
-                        highlight_def(db, def) | HlMod::Definition
-                    } else if element.ancestors().any(|it| it.kind() == USE_TREE) {
-                        HlTag::Symbol(SymbolKind::SelfParam).into()
-                    } else {
-                        return None;
-                    }
-                }
+                // self is handled as either a Name or NameRef already
+                T![self] => return None,
                 T![ref] => element
                     .parent()
                     .and_then(ast::IdentPat::cast)