12 files changed, 41 insertions, 26 deletions

diff --git a/crates/ra_assists/src/add_derive.rs b/crates/ra_assists/src/add_derive.rs
index 0556dd69c..e91b5eb8d 100644
--- a/crates/ra_assists/src/add_derive.rs
+++ b/crates/ra_assists/src/add_derive.rs
@@ -5,12 +5,12 @@ use ra_syntax::{
     TextUnit,
 };
 
-use crate::{AssistCtx, Assist};
+use crate::{AssistCtx, Assist, AssistId};
 
 pub(crate) fn add_derive(mut ctx: AssistCtx<impl HirDatabase>) -> Option<Assist> {
     let nominal = ctx.node_at_offset::<ast::NominalDef>()?;
     let node_start = derive_insertion_offset(nominal)?;
-    ctx.add_action("add `#[derive]`", |edit| {
+    ctx.add_action(AssistId("add_derive"), "add `#[derive]`", |edit| {
         let derive_attr = nominal
             .attrs()
             .filter_map(|x| x.as_call())
diff --git a/crates/ra_assists/src/add_impl.rs b/crates/ra_assists/src/add_impl.rs
index b40b9cc0c..b292f188d 100644
--- a/crates/ra_assists/src/add_impl.rs
+++ b/crates/ra_assists/src/add_impl.rs
@@ -5,12 +5,12 @@ use ra_syntax::{
     TextUnit,
 };
 
-use crate::{AssistCtx, Assist};
+use crate::{AssistCtx, Assist, AssistId};
 
 pub(crate) fn add_impl(mut ctx: AssistCtx<impl HirDatabase>) -> Option<Assist> {
     let nominal = ctx.node_at_offset::<ast::NominalDef>()?;
     let name = nominal.name()?;
-    ctx.add_action("add impl", |edit| {
+    ctx.add_action(AssistId("add_impl"), "add impl", |edit| {
         edit.target(nominal.syntax().range());
         let type_params = nominal.type_param_list();
         let start_offset = nominal.syntax().range().end();
diff --git a/crates/ra_assists/src/assist_ctx.rs b/crates/ra_assists/src/assist_ctx.rs
index e9c4f0a23..4ad21c74b 100644
--- a/crates/ra_assists/src/assist_ctx.rs
+++ b/crates/ra_assists/src/assist_ctx.rs
@@ -7,7 +7,7 @@ use ra_syntax::{
 };
 use ra_fmt::{leading_indent, reindent};
 
-use crate::{AssistLabel, AssistAction};
+use crate::{AssistLabel, AssistAction, AssistId};
 
 #[derive(Clone, Debug)]
 pub(crate) enum Assist {
@@ -81,10 +81,11 @@ impl<'a, DB: HirDatabase> AssistCtx<'a, DB> {
 
     pub(crate) fn add_action(
         &mut self,
+        id: AssistId,
         label: impl Into<String>,
         f: impl FnOnce(&mut AssistBuilder),
     ) -> &mut Self {
-        let label = AssistLabel { label: label.into() };
+        let label = AssistLabel { label: label.into(), id };
         match &mut self.assist {
             Assist::Unresolved(labels) => labels.push(label),
             Assist::Resolved(labels_actions) => {
diff --git a/crates/ra_assists/src/auto_import.rs b/crates/ra_assists/src/auto_import.rs
index 105c888d5..685dbed06 100644
--- a/crates/ra_assists/src/auto_import.rs
+++ b/crates/ra_assists/src/auto_import.rs
@@ -4,7 +4,10 @@ use ra_syntax::{
     ast::{ self, NameOwner }, AstNode, SyntaxNode, Direction, TextRange,
     SyntaxKind::{ PATH, PATH_SEGMENT, COLONCOLON, COMMA }
 };
-use crate::assist_ctx::{AssistCtx, Assist, AssistBuilder};
+use crate::{
+    AssistId,
+    assist_ctx::{AssistCtx, Assist, AssistBuilder},
+};
 
 fn collect_path_segments(path: &ast::Path) -> Option<Vec<&ast::PathSegment>> {
     let mut v = Vec::new();
@@ -526,6 +529,7 @@ pub(crate) fn auto_import(mut ctx: AssistCtx<impl HirDatabase>) -> Option<Assist
     if let Some(module) = path.syntax().ancestors().find_map(ast::Module::cast) {
         if let (Some(item_list), Some(name)) = (module.item_list(), module.name()) {
             ctx.add_action(
+                AssistId("auto_import"),
                 format!("import {} in mod {}", fmt_segments(&segments), name.text()),
                 |edit| {
                     apply_auto_import(item_list.syntax(), path, &segments, edit);
@@ -534,9 +538,13 @@ pub(crate) fn auto_import(mut ctx: AssistCtx<impl HirDatabase>) -> Option<Assist
         }
     } else {
         let current_file = node.ancestors().find_map(ast::SourceFile::cast)?;
-        ctx.add_action(format!("import {} in the current file", fmt_segments(&segments)), |edit| {
-            apply_auto_import(current_file.syntax(), path, &segments, edit);
-        });
+        ctx.add_action(
+            AssistId("auto_import"),
+            format!("import {} in the current file", fmt_segments(&segments)),
+            |edit| {
+                apply_auto_import(current_file.syntax(), path, &segments, edit);
+            },
+        );
     }
 
     ctx.build()
diff --git a/crates/ra_assists/src/change_visibility.rs b/crates/ra_assists/src/change_visibility.rs
index c2ba897a4..50c1be5ae 100644
--- a/crates/ra_assists/src/change_visibility.rs
+++ b/crates/ra_assists/src/change_visibility.rs
@@ -5,7 +5,7 @@ use ra_syntax::{
     SyntaxKind::{VISIBILITY, FN_KW, MOD_KW, STRUCT_KW, ENUM_KW, TRAIT_KW, FN_DEF, MODULE, STRUCT_DEF, ENUM_DEF, TRAIT_DEF, IDENT, WHITESPACE, COMMENT, ATTR},
 };
 
-use crate::{AssistCtx, Assist};
+use crate::{AssistCtx, Assist, AssistId};
 
 pub(crate) fn change_visibility(ctx: AssistCtx<impl HirDatabase>) -> Option<Assist> {
     if let Some(vis) = ctx.node_at_offset::<ast::Visibility>() {
@@ -41,7 +41,7 @@ fn add_vis(mut ctx: AssistCtx<impl HirDatabase>) -> Option<Assist> {
         (vis_offset(field.syntax()), ident.range())
     };
 
-    ctx.add_action("make pub(crate)", |edit| {
+    ctx.add_action(AssistId("change_visibility"), "make pub(crate)", |edit| {
         edit.target(target);
         edit.insert(offset, "pub(crate) ");
         edit.set_cursor(offset);
@@ -63,7 +63,7 @@ fn vis_offset(node: &SyntaxNode) -> TextUnit {
 
 fn change_vis(mut ctx: AssistCtx<impl HirDatabase>, vis: &ast::Visibility) -> Option<Assist> {
     if vis.syntax().text() == "pub" {
-        ctx.add_action("change to pub(crate)", |edit| {
+        ctx.add_action(AssistId("change_visibility"), "change to pub(crate)", |edit| {
             edit.target(vis.syntax().range());
             edit.replace(vis.syntax().range(), "pub(crate)");
             edit.set_cursor(vis.syntax().range().start())
@@ -72,7 +72,7 @@ fn change_vis(mut ctx: AssistCtx<impl HirDatabase>, vis: &ast::Visibility) -> Op
         return ctx.build();
     }
     if vis.syntax().text() == "pub(crate)" {
-        ctx.add_action("change to pub", |edit| {
+        ctx.add_action(AssistId("change_visibility"), "change to pub", |edit| {
             edit.target(vis.syntax().range());
             edit.replace(vis.syntax().range(), "pub");
             edit.set_cursor(vis.syntax().range().start());
diff --git a/crates/ra_assists/src/fill_match_arms.rs b/crates/ra_assists/src/fill_match_arms.rs
index 6bf6e7332..30020b56e 100644
--- a/crates/ra_assists/src/fill_match_arms.rs
+++ b/crates/ra_assists/src/fill_match_arms.rs
@@ -6,7 +6,7 @@ use hir::{
 };
 use ra_syntax::ast::{self, AstNode};
 
-use crate::{AssistCtx, Assist};
+use crate::{AssistCtx, Assist, AssistId};
 
 pub(crate) fn fill_match_arms(mut ctx: AssistCtx<impl HirDatabase>) -> Option<Assist> {
     let match_expr = ctx.node_at_offset::<ast::MatchExpr>()?;
@@ -37,7 +37,7 @@ pub(crate) fn fill_match_arms(mut ctx: AssistCtx<impl HirDatabase>) -> Option<As
     let enum_name = enum_def.name(ctx.db)?;
     let db = ctx.db;
 
-    ctx.add_action("fill match arms", |edit| {
+    ctx.add_action(AssistId("fill_match_arms"), "fill match arms", |edit| {
         let mut buf = format!("match {} {{\n", expr.syntax().text().to_string());
         let variants = enum_def.variants(db);
         for variant in variants {
diff --git a/crates/ra_assists/src/flip_comma.rs b/crates/ra_assists/src/flip_comma.rs
index 0d4a789fc..6b98cac68 100644
--- a/crates/ra_assists/src/flip_comma.rs
+++ b/crates/ra_assists/src/flip_comma.rs
@@ -5,13 +5,13 @@ use ra_syntax::{
     algo::non_trivia_sibling,
 };
 
-use crate::{AssistCtx, Assist};
+use crate::{AssistCtx, Assist, AssistId};
 
 pub(crate) fn flip_comma(mut ctx: AssistCtx<impl HirDatabase>) -> Option<Assist> {
     let comma = ctx.leaf_at_offset().find(|leaf| leaf.kind() == COMMA)?;
     let prev = non_trivia_sibling(comma, Direction::Prev)?;
     let next = non_trivia_sibling(comma, Direction::Next)?;
-    ctx.add_action("flip comma", |edit| {
+    ctx.add_action(AssistId("flip_comma"), "flip comma", |edit| {
         edit.target(comma.range());
         edit.replace(prev.range(), next.text());
         edit.replace(next.range(), prev.text());
diff --git a/crates/ra_assists/src/introduce_variable.rs b/crates/ra_assists/src/introduce_variable.rs
index f0e012105..3d708ebb2 100644
--- a/crates/ra_assists/src/introduce_variable.rs
+++ b/crates/ra_assists/src/introduce_variable.rs
@@ -6,7 +6,7 @@ use ra_syntax::{
     }, SyntaxNode, TextUnit,
 };
 
-use crate::{AssistCtx, Assist};
+use crate::{AssistCtx, Assist, AssistId};
 
 pub(crate) fn introduce_variable(mut ctx: AssistCtx<impl HirDatabase>) -> Option<Assist> {
     let node = ctx.covering_node();
@@ -19,7 +19,7 @@ pub(crate) fn introduce_variable(mut ctx: AssistCtx<impl HirDatabase>) -> Option
     if indent.kind() != WHITESPACE {
         return None;
     }
-    ctx.add_action("introduce variable", move |edit| {
+    ctx.add_action(AssistId("introduce_variable"), "introduce variable", move |edit| {
         let mut buf = String::new();
 
         let cursor_offset = if wrap_in_block {
diff --git a/crates/ra_assists/src/lib.rs b/crates/ra_assists/src/lib.rs
index e1e899edc..56d276867 100644
--- a/crates/ra_assists/src/lib.rs
+++ b/crates/ra_assists/src/lib.rs
@@ -16,10 +16,16 @@ use hir::db::HirDatabase;
 
 pub(crate) use crate::assist_ctx::{AssistCtx, Assist};
 
+/// Unique identifier of the assist, should not be shown to the user
+/// directly.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct AssistId(pub &'static str);
+
 #[derive(Debug, Clone)]
 pub struct AssistLabel {
     /// Short description of the assist, as shown in the UI.
     pub label: String,
+    pub id: AssistId,
 }
 
 #[derive(Debug, Clone)]
diff --git a/crates/ra_assists/src/remove_dbg.rs b/crates/ra_assists/src/remove_dbg.rs
index 2bed270a1..6ea48d909 100644
--- a/crates/ra_assists/src/remove_dbg.rs
+++ b/crates/ra_assists/src/remove_dbg.rs
@@ -6,7 +6,7 @@ use ra_syntax::{
         L_PAREN, R_PAREN, L_CURLY, R_CURLY, L_BRACK, R_BRACK, EXCL
     },
 };
-use crate::{AssistCtx, Assist};
+use crate::{AssistCtx, Assist, AssistId};
 
 pub(crate) fn remove_dbg(mut ctx: AssistCtx<impl HirDatabase>) -> Option<Assist> {
     let macro_call = ctx.node_at_offset::<ast::MacroCall>()?;
@@ -46,7 +46,7 @@ pub(crate) fn remove_dbg(mut ctx: AssistCtx<impl HirDatabase>) -> Option<Assist>
         macro_args.text().slice(start..end).to_string()
     };
 
-    ctx.add_action("remove dbg!()", |edit| {
+    ctx.add_action(AssistId("remove_dbg"), "remove dbg!()", |edit| {
         edit.target(macro_call.syntax().range());
         edit.replace(macro_range, macro_content);
         edit.set_cursor(cursor_pos);
diff --git a/crates/ra_assists/src/replace_if_let_with_match.rs b/crates/ra_assists/src/replace_if_let_with_match.rs
index 87a2c1185..230573499 100644
--- a/crates/ra_assists/src/replace_if_let_with_match.rs
+++ b/crates/ra_assists/src/replace_if_let_with_match.rs
@@ -2,7 +2,7 @@ use ra_syntax::{AstNode, ast};
 use ra_fmt::extract_trivial_expression;
 use hir::db::HirDatabase;
 
-use crate::{AssistCtx, Assist};
+use crate::{AssistCtx, Assist, AssistId};
 
 pub(crate) fn replace_if_let_with_match(mut ctx: AssistCtx<impl HirDatabase>) -> Option<Assist> {
     let if_expr: &ast::IfExpr = ctx.node_at_offset()?;
@@ -15,7 +15,7 @@ pub(crate) fn replace_if_let_with_match(mut ctx: AssistCtx<impl HirDatabase>) ->
         ast::ElseBranchFlavor::IfExpr(_) => return None,
     };
 
-    ctx.add_action("replace with match", |edit| {
+    ctx.add_action(AssistId("replace_if_let_with_match"), "replace with match", |edit| {
         let match_expr = build_match_expr(expr, pat, then_block, else_block);
         edit.target(if_expr.syntax().range());
         edit.replace_node_and_indent(if_expr.syntax(), match_expr);
diff --git a/crates/ra_assists/src/split_import.rs b/crates/ra_assists/src/split_import.rs
index f043be636..dd5be4e91 100644
--- a/crates/ra_assists/src/split_import.rs
+++ b/crates/ra_assists/src/split_import.rs
@@ -5,7 +5,7 @@ use ra_syntax::{
     algo::generate,
 };
 
-use crate::{AssistCtx, Assist};
+use crate::{AssistCtx, Assist, AssistId};
 
 pub(crate) fn split_import(mut ctx: AssistCtx<impl HirDatabase>) -> Option<Assist> {
     let colon_colon = ctx.leaf_at_offset().find(|leaf| leaf.kind() == COLONCOLON)?;
@@ -23,7 +23,7 @@ pub(crate) fn split_import(mut ctx: AssistCtx<impl HirDatabase>) -> Option<Assis
         None => top_path.syntax().range().end(),
     };
 
-    ctx.add_action("split import", |edit| {
+    ctx.add_action(AssistId("split_import"), "split import", |edit| {
         edit.target(colon_colon.range());
         edit.insert(l_curly, "{");
         edit.insert(r_curly, "}");