Changes from review

crates/ide/src/doc_links.rs

@@ -100,9 +100,6 @@ pub fn get_doc_link<T: Resolvable + Clone>(db: &dyn HirDatabase, definition: &T)
 // BUG: For Option
 // Returns https://doc.rust-lang.org/nightly/core/prelude/v1/enum.Option.html#variant.Some
 // Instead of https://doc.rust-lang.org/nightly/core/option/enum.Option.html
-//
-// BUG: For methods
-// import_map.path_of(ns) fails, is not designed to resolve methods
 fn get_doc_link_impl(db: &dyn HirDatabase, moddef: &ModuleDef) -> Option<String> {
     // Get the outermost definition for the moduledef. This is used to resolve the public path to the type,
     // then we can join the method, field, etc onto it if required.

crates/ide/src/lib.rs

@@ -383,7 +383,7 @@ impl Analysis {
     }
 
     /// Return URL(s) for the documentation of the symbol under the cursor.
-    pub fn get_doc_url(
+    pub fn external_docs(
         &self,
         position: FilePosition,
     ) -> Cancelable<Option<doc_links::DocumentationLink>> {

crates/rust-analyzer/src/handlers.rs

@@ -34,7 +34,7 @@ use crate::{
     config::RustfmtConfig,
     from_json, from_proto,
     global_state::{GlobalState, GlobalStateSnapshot},
-    lsp_ext::{self, DocumentationLink, InlayHint, InlayHintsParams, OpenDocsParams},
+    lsp_ext::{self, InlayHint, InlayHintsParams},
     to_proto, LspError, Result,
 };
 
@@ -1312,15 +1312,14 @@ pub(crate) fn handle_semantic_tokens_range(
 
 pub(crate) fn handle_open_docs(
     snap: GlobalStateSnapshot,
-    params: OpenDocsParams,
-) -> Result<DocumentationLink> {
+    params: lsp_types::TextDocumentPositionParams,
+) -> Result<Option<lsp_types::Url>> {
     let _p = profile::span("handle_open_docs");
-    let position = from_proto::file_position(&snap, params.position)?;
+    let position = from_proto::file_position(&snap, params)?;
 
-    // FIXME: Propogate or ignore this error instead of panicking.
-    let remote = snap.analysis.get_doc_url(position)?.unwrap();
+    let remote = snap.analysis.external_docs(position)?;
 
-    Ok(DocumentationLink { remote })
+    Ok(remote.and_then(|remote| Url::parse(&remote).ok()))
 }
 
 fn implementation_title(count: usize) -> String {

crates/rust-analyzer/src/lsp_ext.rs

@@ -348,30 +348,10 @@ pub struct CommandLink {
     pub tooltip: Option<String>,
 }
 
-pub enum OpenDocs {}
+pub enum ExternalDocs {}
 
-impl Request for OpenDocs {
-    type Params = OpenDocsParams;
-    type Result = DocumentationLink;
-    const METHOD: &'static str = "rust-analyzer/openDocs";
-}
-
-#[derive(Debug, PartialEq, Clone, Deserialize, Serialize)]
-#[serde(rename_all = "camelCase")]
-pub struct OpenDocsParams {
-    // TODO: I don't know the difference between these two methods of passing position.
-    #[serde(flatten)]
-    pub position: lsp_types::TextDocumentPositionParams,
-    // pub textDocument: lsp_types::TextDocumentIdentifier,
-    // pub position: lsp_types::Position,
-}
-
-#[derive(Debug, PartialEq, Clone, Deserialize, Serialize)]
-#[serde(rename_all = "camelCase")]
-pub struct DocumentationLink {
-    pub remote: String, // TODO: Better API?
-                        // #[serde(skip_serializing_if = "Option::is_none")]
-                        // pub remote: Option<String>,
-                        // #[serde(skip_serializing_if = "Option::is_none")]
-                        // pub local: Option<String>
+impl Request for ExternalDocs {
+    type Params = lsp_types::TextDocumentPositionParams;
+    type Result = Option<lsp_types::Url>;
+    const METHOD: &'static str = "experimental/externalDocs";
 }

crates/rust-analyzer/src/main_loop.rs

@@ -384,7 +384,7 @@ impl GlobalState {
             .on::<lsp_ext::CodeActionRequest>(handlers::handle_code_action)?
             .on::<lsp_ext::ResolveCodeActionRequest>(handlers::handle_resolve_code_action)?
             .on::<lsp_ext::HoverRequest>(handlers::handle_hover)?
-            .on::<lsp_ext::OpenDocs>(handlers::handle_open_docs)?
+            .on::<lsp_ext::ExternalDocs>(handlers::handle_open_docs)?
             .on::<lsp_types::request::OnTypeFormatting>(handlers::handle_on_type_formatting)?
             .on::<lsp_types::request::DocumentSymbolRequest>(handlers::handle_document_symbol)?
             .on::<lsp_types::request::WorkspaceSymbol>(handlers::handle_workspace_symbol)?

editors/code/src/lsp_ext.ts

@@ -119,13 +119,4 @@ export interface CommandLinkGroup {
     commands: CommandLink[];
 }
 
-export interface DocumentationLink {
-    remote: string;
-}
-
-export interface OpenDocsParams {
-    textDocument: lc.TextDocumentIdentifier;
-    position: lc.Position;
-}
-
-export const openDocs = new lc.RequestType<OpenDocsParams, DocumentationLink, void>('rust-analyzer/openDocs');
+export const openDocs = new lc.RequestType<lc.TextDocumentPositionParams, String | void, void>('experimental/externalDocs');