Fix Copy C identifier

Author: kylebonnici

CHANGELOG.md

@@ -10,6 +10,11 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 - Added .keymap to support ZMK to list of file extensions for devicetree language.
 
+### Fixed
+
+- Fixed `Request devicetree/customActions failed with message: Cannot read properties of undefined (reading 'uri")`
+  in VSCode when using context menu document to `Copy C identifier`
+
 ## [0.9.4] - 2026-05-22
 
 ### Added

client/src/extension.ts

@@ -18,8 +18,10 @@ import * as path from 'path';
 import * as vscode from 'vscode';
 
 import {
+	DocumentUri,
 	LanguageClient,
 	LanguageClientOptions,
+	Position,
 	ServerOptions,
 	TextDocumentPositionParams,
 	TransportKind,
@@ -383,8 +385,21 @@ export async function activate(context: vscode.ExtensionContext) {
 		vscode.commands.registerCommand(
 			'devicetree.clipboard.dtMacro',
 			async (textDocumentPositionParams?: TextDocumentPositionParams) => {
+				if (
+					textDocumentPositionParams &&
+					(!('position' in textDocumentPositionParams) ||
+						!('textDocument' in textDocumentPositionParams) ||
+						!Position.is(textDocumentPositionParams.position) ||
+						!DocumentUri.is(
+							textDocumentPositionParams.textDocument.uri,
+						))
+				) {
+					textDocumentPositionParams = undefined;
+				}
+
 				textDocumentPositionParams ??=
 					getCurrentTextDocumentPositionParams();
+
 				if (!textDocumentPositionParams) {
 					return;
 				}

client/src/helpers.ts

@@ -17,7 +17,9 @@
 import * as vscode from 'vscode';
 import { TextDocumentPositionParams } from 'vscode-languageclient';
 
-export function getCurrentTextDocumentPositionParams() {
+export function getCurrentTextDocumentPositionParams():
+	| TextDocumentPositionParams
+	| undefined {
 	const editor = vscode.window.activeTextEditor;
 	if (!editor) {
 		return;
@@ -31,5 +33,5 @@ export function getCurrentTextDocumentPositionParams() {
 			line: editor.selection.active.line,
 			character: editor.selection.active.character,
 		},
-	} satisfies TextDocumentPositionParams;
+	};
 }