Refactor vscode extension

editors/code/src/commands/extend_selection.ts

@@ -0,0 +1,29 @@
+import * as vscode from 'vscode';
+
+import { TextDocumentIdentifier, Range } from "vscode-languageclient";
+import { Server } from '../server';
+
+interface ExtendSelectionParams {
+    textDocument: TextDocumentIdentifier;
+    selections: Range[];
+}
+
+interface ExtendSelectionResult {
+    selections: Range[];
+}
+
+export async function handle() {
+    let editor = vscode.window.activeTextEditor
+    if (editor == null || editor.document.languageId != "rust") return
+    let request: ExtendSelectionParams = {
+        textDocument: { uri: editor.document.uri.toString() },
+        selections: editor.selections.map((s) => {
+            return Server.client.code2ProtocolConverter.asRange(s)
+        })
+    }
+    let response = await Server.client.sendRequest<ExtendSelectionResult>("m/extendSelection", request)
+    editor.selections = response.selections.map((range: Range) => {
+        let r = Server.client.protocol2CodeConverter.asRange(range)
+        return new vscode.Selection(r.start, r.end)
+    })
+}