From 3746689e9ddea455d10a41d9fc3af33b22a3707d Mon Sep 17 00:00:00 2001
From: "Jeremy A. Kolb" <jkolb@ara.com>
Date: Thu, 18 Oct 2018 13:40:12 -0400
Subject: Implement Find All References for local variables

---
 crates/ra_lsp_server/src/caps.rs               |  2 +-
 crates/ra_lsp_server/src/main_loop/handlers.rs | 16 ++++++++++++++++
 crates/ra_lsp_server/src/main_loop/mod.rs      |  1 +
 crates/ra_lsp_server/src/req.rs                |  2 +-
 4 files changed, 19 insertions(+), 2 deletions(-)

(limited to 'crates/ra_lsp_server')

diff --git a/crates/ra_lsp_server/src/caps.rs b/crates/ra_lsp_server/src/caps.rs
index 1dd495791..84c43bbec 100644
--- a/crates/ra_lsp_server/src/caps.rs
+++ b/crates/ra_lsp_server/src/caps.rs
@@ -27,7 +27,7 @@ pub fn server_capabilities() -> ServerCapabilities {
         definition_provider: Some(true),
         type_definition_provider: None,
         implementation_provider: None,
-        references_provider: None,
+        references_provider: Some(true),
         document_highlight_provider: None,
         document_symbol_provider: Some(true),
         workspace_symbol_provider: Some(true),
diff --git a/crates/ra_lsp_server/src/main_loop/handlers.rs b/crates/ra_lsp_server/src/main_loop/handlers.rs
index c25b63852..9b8d40eaa 100644
--- a/crates/ra_lsp_server/src/main_loop/handlers.rs
+++ b/crates/ra_lsp_server/src/main_loop/handlers.rs
@@ -460,6 +460,22 @@ pub fn handle_signature_help(
     }
 }
 
+pub fn handle_references(
+    world: ServerWorld,
+    params: req::ReferenceParams,
+    token: JobToken,
+) -> Result<Option<Vec<Location>>> {
+    let file_id = params.text_document.try_conv_with(&world)?;
+    let line_index = world.analysis().file_line_index(file_id);
+    let offset = params.position.conv_with(&line_index);
+
+    let refs = world.analysis().find_all_refs(file_id, offset, &token);
+
+    Ok(Some(refs.into_iter()
+        .filter_map(|r| to_location(r.0, r.1, &world, &line_index).ok())
+        .collect()))
+}
+
 pub fn handle_code_action(
     world: ServerWorld,
     params: req::CodeActionParams,
diff --git a/crates/ra_lsp_server/src/main_loop/mod.rs b/crates/ra_lsp_server/src/main_loop/mod.rs
index a11baf4aa..7efec8a7a 100644
--- a/crates/ra_lsp_server/src/main_loop/mod.rs
+++ b/crates/ra_lsp_server/src/main_loop/mod.rs
@@ -248,6 +248,7 @@ fn on_request(
         .on::<req::CodeActionRequest>(handlers::handle_code_action)?
         .on::<req::FoldingRangeRequest>(handlers::handle_folding_range)?
         .on::<req::SignatureHelpRequest>(handlers::handle_signature_help)?
+        .on::<req::References>(handlers::handle_references)?
         .finish();
     match req {
         Ok((id, handle)) => {
diff --git a/crates/ra_lsp_server/src/req.rs b/crates/ra_lsp_server/src/req.rs
index b76bfbcbc..6cd04d84c 100644
--- a/crates/ra_lsp_server/src/req.rs
+++ b/crates/ra_lsp_server/src/req.rs
@@ -7,7 +7,7 @@ pub use languageserver_types::{
     CompletionResponse, DocumentOnTypeFormattingParams, DocumentSymbolParams,
     DocumentSymbolResponse, ExecuteCommandParams, Hover, InitializeResult,
     PublishDiagnosticsParams, SignatureHelp, TextDocumentEdit, TextDocumentPositionParams,
-    TextEdit, WorkspaceSymbolParams,
+    TextEdit, WorkspaceSymbolParams, ReferenceParams,
 };
 
 pub enum SyntaxTree {}
-- 
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