feat: add rust-analyzer.viewHir

FYI #256

README.md

@@ -86,6 +86,7 @@ You can use these commands by `:CocCommand XYZ`.
 - `rust-analyzer.serverVersion`: Show current Rust Analyzer server version
 - `rust-analyzer.toggleInlayHints`: Toggle inlay hints on/off
 - `rust-analyzer.explainError`: Explain the currently hovered error message
+- `rust-analyzer.viewHir`: View Hir
 - `rust-analyzer.upgrade`: Download latest `rust-analyzer` from [GitHub release](https://github.com/rust-analyzer/rust-analyzer/releases)
 
 ## Highlight Group

package.json

@@ -597,6 +597,11 @@
         "title": "Expand macro recursively",
         "category": "Rust Analyzer"
       },
+      {
+        "command": "rust-analyzer.viewHir",
+        "title": "View Hir",
+        "category": "Rust Analyzer"
+      },
       {
         "command": "rust-analyzer.explainError",
         "title": "Explain the currently hovered diagnostic",

src/commands.ts

@@ -548,3 +548,20 @@ export function openCargoToml(ctx: Ctx): Cmd {
     await workspace.jumpTo(location.uri);
   };
 }
+
+export function viewHir(ctx: Ctx): Cmd {
+  return async () => {
+    const { document, position } = await workspace.getCurrentState();
+    if (!isRustDocument(document)) return;
+
+    const param: TextDocumentPositionParams = {
+      textDocument: { uri: document.uri },
+      position,
+    };
+    const ret = await ctx.client.sendRequest(ra.viewHir, param);
+    await workspace.nvim.command('tabnew').then(async () => {
+      const buf = await workspace.nvim.buffer;
+      buf.setLines(ret.split('\n'), { start: 0, end: -1 });
+    });
+  };
+}

src/index.ts

@@ -57,6 +57,7 @@ export async function activate(context: ExtensionContext): Promise<void> {
   ctx.registerCommand('explainError', cmds.explainError);
   ctx.registerCommand('upgrade', cmds.upgrade);
   ctx.registerCommand('ssr', cmds.ssr);
+  ctx.registerCommand('viewHir', cmds.viewHir);
   ctx.registerCommand('serverVersion', cmds.serverVersion);
   ctx.registerCommand('toggleInlayHints', cmds.toggleInlayHints);
   ctx.registerCommand('reload', (ctx) => {

src/lsp_ext.ts

@@ -24,6 +24,8 @@ export interface SyntaxTreeParams {
 }
 export const syntaxTree = new lc.RequestType<SyntaxTreeParams, string, void>('rust-analyzer/syntaxTree');
 
+export const viewHir = new lc.RequestType<lc.TextDocumentPositionParams, string, void>('rust-analyzer/viewHir');
+
 export interface ExpandMacroParams {
   textDocument: lc.TextDocumentIdentifier;
   position: lc.Position;