Add --class command line parameter

[bagratte]

The parameter overrides the application name
(WM_CLASS).

Fixes #284420

[vs-code-engineering]

📬 CODENOTIFY

The following users are being notified based on files changed in this PR:

@bpasero

Matched files:

• src/vs/code/electron-main/main.ts
• src/vs/platform/environment/common/argv.ts
• src/vs/platform/environment/node/argv.ts

@deepak1556

Matched files:

• src/vs/code/electron-main/main.ts

[bagratte]

@microsoft-github-policy-service agree

[Copilot]

Pull request overview

This PR adds a new --class command line parameter that allows users to override the application name (WM_CLASS) on Linux, enabling window managers to apply specific rules to VS Code windows. This addresses issue #284420.

Key Changes

• Added a new --class command line option to the argument parser
• The option accepts a string value that sets the application class name
• Implementation uses Electron's app.setName() and app.setDesktopName() APIs

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
src/vs/platform/environment/node/argv.ts	Adds the --class command line option definition with localized description
src/vs/platform/environment/common/argv.ts	Adds the class property to the NativeParsedArgs interface
src/vs/code/electron-main/main.ts	Implements the feature by calling Electron's app name APIs when the --class argument is provided