feat: Switch to LSP inlay hints

crates/rust-analyzer/src/caps.rs

@@ -112,11 +112,10 @@ pub fn server_capabilities(config: &Config) -> ServerCapabilities {
             .into(),
         ),
         moniker_provider: None,
-        inlay_hint_provider: None,
+        inlay_hint_provider: Some(OneOf::Left(true)),
         experimental: Some(json!({
             "externalDocs": true,
             "hoverRange": true,
-            "inlayHints": true,
             "joinLines": true,
             "matchingBrace": true,
             "moveItem": true,

crates/rust-analyzer/src/handlers.rs

@@ -19,11 +19,11 @@ use lsp_types::{
     CallHierarchyIncomingCall, CallHierarchyIncomingCallsParams, CallHierarchyItem,
     CallHierarchyOutgoingCall, CallHierarchyOutgoingCallsParams, CallHierarchyPrepareParams,
     CodeLens, CompletionItem, Diagnostic, DiagnosticTag, DocumentFormattingParams, FoldingRange,
-    FoldingRangeParams, HoverContents, Location, LocationLink, NumberOrString, Position,
-    PrepareRenameResponse, Range, RenameParams, SemanticTokensDeltaParams,
-    SemanticTokensFullDeltaResult, SemanticTokensParams, SemanticTokensRangeParams,
-    SemanticTokensRangeResult, SemanticTokensResult, SymbolInformation, SymbolTag,
-    TextDocumentIdentifier, Url, WorkspaceEdit,
+    FoldingRangeParams, HoverContents, InlayHint, InlayHintParams, Location, LocationLink,
+    NumberOrString, Position, PrepareRenameResponse, Range, RenameParams,
+    SemanticTokensDeltaParams, SemanticTokensFullDeltaResult, SemanticTokensParams,
+    SemanticTokensRangeParams, SemanticTokensRangeResult, SemanticTokensResult, SymbolInformation,
+    SymbolTag, TextDocumentIdentifier, Url, WorkspaceEdit,
 };
 use project_model::{ManifestPath, ProjectWorkspace, TargetKind};
 use serde_json::json;
@@ -38,10 +38,7 @@ use crate::{
     from_proto,
     global_state::{GlobalState, GlobalStateSnapshot},
     line_index::LineEndings,
-    lsp_ext::{
-        self, InlayHint, InlayHintsParams, PositionOrRange, ViewCrateGraphParams,
-        WorkspaceSymbolParams,
-    },
+    lsp_ext::{self, PositionOrRange, ViewCrateGraphParams, WorkspaceSymbolParams},
     lsp_utils::{all_edits_are_disjoint, invalid_params_error},
     to_proto, LspError, Result,
 };
@@ -1322,29 +1319,25 @@ pub(crate) fn publish_diagnostics(
 
 pub(crate) fn handle_inlay_hints(
     snap: GlobalStateSnapshot,
-    params: InlayHintsParams,
-) -> Result<Vec<InlayHint>> {
+    params: InlayHintParams,
+) -> Result<Option<Vec<InlayHint>>> {
     let _p = profile::span("handle_inlay_hints");
     let document_uri = &params.text_document.uri;
     let file_id = from_proto::file_id(&snap, document_uri)?;
     let line_index = snap.file_line_index(file_id)?;
-    let range = params
-        .range
-        .map(|range| {
-            from_proto::file_range(
-                &snap,
-                TextDocumentIdentifier::new(document_uri.to_owned()),
-                range,
-            )
-        })
-        .transpose()?;
+    let range = from_proto::file_range(
+        &snap,
+        TextDocumentIdentifier::new(document_uri.to_owned()),
+        params.range,
+    )?;
     let inlay_hints_config = snap.config.inlay_hints();
-    Ok(snap
-        .analysis
-        .inlay_hints(&inlay_hints_config, file_id, range)?
-        .into_iter()
-        .map(|it| to_proto::inlay_hint(inlay_hints_config.render_colons, &line_index, it))
-        .collect())
+    Ok(Some(
+        snap.analysis
+            .inlay_hints(&inlay_hints_config, file_id, Some(range))?
+            .into_iter()
+            .map(|it| to_proto::inlay_hint(inlay_hints_config.render_colons, &line_index, it))
+            .collect(),
+    ))
 }
 
 pub(crate) fn handle_call_hierarchy_prepare(

crates/rust-analyzer/src/lsp_ext.rs

@@ -236,59 +236,13 @@ pub struct TestInfo {
     pub runnable: Runnable,
 }
 
-pub enum InlayHints {}
-
-impl Request for InlayHints {
-    type Params = InlayHintsParams;
-    type Result = Vec<InlayHint>;
-    const METHOD: &'static str = "experimental/inlayHints";
-}
-
 #[derive(Serialize, Deserialize, Debug)]
 #[serde(rename_all = "camelCase")]
 pub struct InlayHintsParams {
     pub text_document: TextDocumentIdentifier,
     pub range: Option<lsp_types::Range>,
 }
 
-#[derive(Eq, PartialEq, Debug, Copy, Clone, Serialize, Deserialize)]
-#[serde(transparent)]
-pub struct InlayHintKind(u8);
-
-impl InlayHintKind {
-    pub const TYPE: InlayHintKind = InlayHintKind(1);
-    pub const PARAMETER: InlayHintKind = InlayHintKind(2);
-}
-
-#[derive(Debug, Deserialize, Serialize)]
-#[serde(rename_all = "camelCase")]
-pub struct InlayHint {
-    pub label: InlayHintLabel,
-    pub position: Position,
-    pub kind: Option<InlayHintKind>,
-    pub tooltip: Option<String>,
-    pub padding_left: Option<bool>,
-    pub padding_right: Option<bool>,
-}
-
-#[derive(Debug, Deserialize, Serialize)]
-#[serde(untagged)]
-pub enum InlayHintLabel {
-    String(String),
-    Parts(Vec<InlayHintLabelPart>),
-}
-
-#[derive(Debug, Deserialize, Serialize)]
-#[serde(rename_all = "camelCase")]
-pub struct InlayHintLabelPart {
-    pub value: String,
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub tooltip: Option<String>,
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub location: Option<lsp_types::LocationLink>,
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub command: Option<lsp_types::Command>,
-}
 pub enum Ssr {}
 
 impl Request for Ssr {

crates/rust-analyzer/src/main_loop.rs

@@ -597,7 +597,6 @@ impl GlobalState {
             .on::<lsp_ext::ParentModule>(handlers::handle_parent_module)
             .on::<lsp_ext::Runnables>(handlers::handle_runnables)
             .on::<lsp_ext::RelatedTests>(handlers::handle_related_tests)
-            .on::<lsp_ext::InlayHints>(handlers::handle_inlay_hints)
             .on::<lsp_ext::CodeActionRequest>(handlers::handle_code_action)
             .on::<lsp_ext::CodeActionResolveRequest>(handlers::handle_code_action_resolve)
             .on::<lsp_ext::HoverRequest>(handlers::handle_hover)
@@ -611,6 +610,7 @@ impl GlobalState {
             .on::<lsp_types::request::GotoDeclaration>(handlers::handle_goto_declaration)
             .on::<lsp_types::request::GotoImplementation>(handlers::handle_goto_implementation)
             .on::<lsp_types::request::GotoTypeDefinition>(handlers::handle_goto_type_definition)
+            .on::<lsp_types::request::InlayHintRequest>(handlers::handle_inlay_hints)
             .on::<lsp_types::request::Completion>(handlers::handle_completion)
             .on::<lsp_types::request::ResolveCompletionItem>(handlers::handle_completion_resolve)
             .on::<lsp_types::request::CodeLensRequest>(handlers::handle_code_lens)

crates/rust-analyzer/src/to_proto.rs

@@ -418,14 +418,8 @@ pub(crate) fn inlay_hint(
     render_colons: bool,
     line_index: &LineIndex,
     inlay_hint: InlayHint,
-) -> lsp_ext::InlayHint {
-    lsp_ext::InlayHint {
-        label: lsp_ext::InlayHintLabel::String(match inlay_hint.kind {
-            InlayKind::ParameterHint if render_colons => format!("{}:", inlay_hint.label),
-            InlayKind::TypeHint if render_colons => format!(": {}", inlay_hint.label),
-            InlayKind::ClosureReturnTypeHint => format!(" -> {}", inlay_hint.label),
-            _ => inlay_hint.label.to_string(),
-        }),
+) -> lsp_types::InlayHint {
+    lsp_types::InlayHint {
         position: match inlay_hint.kind {
             // before annotated thing
             InlayKind::ParameterHint | InlayKind::ImplicitReborrow => {
@@ -438,10 +432,16 @@ pub(crate) fn inlay_hint(
             | InlayKind::GenericParamListHint
             | InlayKind::LifetimeHint => position(line_index, inlay_hint.range.end()),
         },
+        label: lsp_types::InlayHintLabel::String(match inlay_hint.kind {
+            InlayKind::ParameterHint if render_colons => format!("{}:", inlay_hint.label),
+            InlayKind::TypeHint if render_colons => format!(": {}", inlay_hint.label),
+            InlayKind::ClosureReturnTypeHint => format!(" -> {}", inlay_hint.label),
+            _ => inlay_hint.label.to_string(),
+        }),
         kind: match inlay_hint.kind {
-            InlayKind::ParameterHint => Some(lsp_ext::InlayHintKind::PARAMETER),
+            InlayKind::ParameterHint => Some(lsp_types::InlayHintKind::PARAMETER),
             InlayKind::ClosureReturnTypeHint | InlayKind::TypeHint | InlayKind::ChainingHint => {
-                Some(lsp_ext::InlayHintKind::TYPE)
+                Some(lsp_types::InlayHintKind::TYPE)
             }
             InlayKind::GenericParamListHint
             | InlayKind::LifetimeHint
@@ -465,6 +465,7 @@ pub(crate) fn inlay_hint(
             InlayKind::GenericParamListHint => false,
             InlayKind::ImplicitReborrow => false,
         }),
+        text_edits: None,
     }
 }
 

docs/dev/lsp-extensions.md

@@ -1,5 +1,5 @@
 <!---
-lsp_ext.rs hash: a61de7db4504a4d1
+lsp_ext.rs hash: 326ad62235135223
 
 If you need to change the above hash to make the test pass, please check if you
 need to adjust this doc as well and ping this issue:
@@ -571,36 +571,6 @@ interface ExpandedMacro {
 
 Expands macro call at a given position.
 
-## Inlay Hints
-
-**Method:** `experimental/inlayHints`
-
-This request is sent from client to server to render "inlay hints" -- virtual text inserted into editor to show things like inferred types.
-Generally, the client should re-query inlay hints after every modification.
-Until it gets upstreamed, this follows the VS Code API.
-Upstream issues: https://github.com/microsoft/language-server-protocol/issues/956 , https://github.com/rust-analyzer/rust-analyzer/issues/2797
-
-**Request:**
-
-```typescript
-interface InlayHintsParams {
-    textDocument: TextDocumentIdentifier,
-}
-```
-
-**Response:** `InlayHint[]`
-
-```typescript
-interface InlayHint {
-    position: Position;
-    label: string | InlayHintLabelPart[];
-    tooltip?: string | MarkdownString | undefined;
-    kind?: InlayHintKind;
-    paddingLeft?: boolean;
-    paddingRight?: boolean;
-}
-```
-
 ## Hover Actions
 
 **Experimental Client Capability:** `{ "hoverActions": boolean }`