wip

Author: chrismwendt

.gitignore

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+.cache/
+dist/
+node_modules/

README.md

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+# Token Highlights Sourcegraph Extension
+
+A [Sourcegraph extension](https://github.com/sourcegraph/sourcegraph-extension-api) for highlighting lines matching the currently hovered token on GitHub, Sourcegraph, and other tools.
+
+[**➕ Add to Sourcegraph**](https://sourcegraph.com/extensions/chris/token-highlights)
+
+Source code on GitHub: https://github.com/sourcegraph/sourcegraph-token-highlights
+
+![demo](https://user-images.githubusercontent.com/1387653/45539771-86065a80-b7bf-11e8-8d44-d9878cbae054.gif)

package.json

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+{
+  "name": "graphql",
+  "publisher": "chris",
+  "title": "GraphQL",
+  "description": "GraphQL code intelligence.",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/sourcegraph/sourcegraph-token-highlights.git"
+  },
+  "activationEvents": [
+    "*"
+  ],
+  "main": "dist/extension.js",
+  "scripts": {
+    "sourcegraph:prepublish": "parcel build src/extension.ts"
+  },
+  "devDependencies": {
+    "parcel-bundler": "^1.9.7",
+    "sourcegraph": "^16.0.0",
+    "typescript": "^3.0.3"
+  },
+  "dependencies": {
+    "vscode-ws-jsonrpc": "^0.0.1-alpha.5"
+  }
+}

src/extension.ts

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+import * as sourcegraph from "sourcegraph";
+
+import * as rpc from "vscode-ws-jsonrpc";
+
+export function activate(): void {
+  const webSocket = new WebSocket("ws://localhost:1234");
+  rpc.listen({
+    webSocket,
+    onConnection: (connection: rpc.MessageConnection) => {
+      connection.listen();
+
+      sourcegraph.languages.registerHoverProvider(["*"], {
+        provideHover: async (doc, pos) => {
+          return connection
+            .sendRequest<sourcegraph.Hover>("hov", doc, pos)
+            .then(v => {
+              console.log("recv response hov", v);
+              return (
+                v && {
+                  contents: {
+                    value:
+                      "```python\n" + (v.contents as any).join("\n") + "\n```",
+                    kind: sourcegraph.MarkupKind.Markdown
+                  }
+                }
+              );
+            });
+        }
+      });
+
+      sourcegraph.languages.registerDefinitionProvider(["*"], {
+        provideDefinition: async (doc, pos) => {
+          return connection.sendRequest<any>("def", doc, pos).then(v => {
+            console.log("recv response def", v);
+            return (
+              v &&
+              new sourcegraph.Location(
+                new sourcegraph.URI(doc.uri),
+                new sourcegraph.Range(
+                  new sourcegraph.Position(v.start.line, v.start.character),
+                  new sourcegraph.Position(v.end.line, v.end.character)
+                )
+              )
+            );
+          });
+        }
+      });
+    }
+  });
+}