Add a "Debug ItemTree" LSP request

crates/rust-analyzer/src/handlers.rs

@@ -117,6 +117,16 @@ pub(crate) fn handle_view_hir(
     Ok(res)
 }
 
+pub(crate) fn handle_view_item_tree(
+    snap: GlobalStateSnapshot,
+    params: lsp_ext::ViewItemTreeParams,
+) -> Result<String> {
+    let _p = profile::span("handle_view_item_tree");
+    let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
+    let res = snap.analysis.view_item_tree(file_id)?;
+    Ok(res)
+}
+
 pub(crate) fn handle_view_crate_graph(snap: GlobalStateSnapshot, (): ()) -> Result<String> {
     let _p = profile::span("handle_view_crate_graph");
     let dot = snap.analysis.view_crate_graph()??;

crates/rust-analyzer/src/lsp_ext.rs

@@ -70,6 +70,20 @@ impl Request for ViewCrateGraph {
     const METHOD: &'static str = "rust-analyzer/viewCrateGraph";
 }
 
+#[derive(Deserialize, Serialize, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct ViewItemTreeParams {
+    pub text_document: TextDocumentIdentifier,
+}
+
+pub enum ViewItemTree {}
+
+impl Request for ViewItemTree {
+    type Params = ViewItemTreeParams;
+    type Result = String;
+    const METHOD: &'static str = "rust-analyzer/viewItemTree";
+}
+
 pub enum ExpandMacro {}
 
 impl Request for ExpandMacro {

crates/rust-analyzer/src/main_loop.rs

@@ -514,6 +514,7 @@ impl GlobalState {
             .on::<lsp_ext::SyntaxTree>(handlers::handle_syntax_tree)
             .on::<lsp_ext::ViewHir>(handlers::handle_view_hir)
             .on::<lsp_ext::ViewCrateGraph>(handlers::handle_view_crate_graph)
+            .on::<lsp_ext::ViewItemTree>(handlers::handle_view_item_tree)
             .on::<lsp_ext::ExpandMacro>(handlers::handle_expand_macro)
             .on::<lsp_ext::ParentModule>(handlers::handle_parent_module)
             .on::<lsp_ext::Runnables>(handlers::handle_runnables)