Keyboard Shortcuts for LineEdit not usable in Browsers on Mac OS

[floers]

Bug Description

On Mac OS it does not work properly to copy/paste/cut (via CMD+C, CMD+V, CMD+X) into and from LineEdit components.

This is reproducible via the gallery web example:
https://snapshots.slint.dev/master/demos/gallery/

We tested it with Chrome.

Reproducible Code (if applicable)

import { LineEdit } from "std-widgets.slint";

export component MyWindow inherits Window {
  LineEdit { }
}

Environment Details

• Slint Version: 1.9.2
• Platform/OS: Mac OS, Chrome
• Programming Language: Rust
• Backend/Renderer: WASM build so I think it's winit/software?

Product Impact

We want to create a small login form and utility web app with slint. With this bug it is completely unusable because we need the user to paste values into the LineEdits.

[ogoffart]

Works for me with firefox and chromium under Linux.

@tronical could it be a problem because of the ctrl/cmd mapping not working properly on the browser?

[floers]

using CMD+V prepends a 'v':

Screen.Recording.2025-01-27.at.12.27.00.mov

CMD+A does not work at all:

Screen.Recording.2025-01-27.at.12.27.11.mov

Select all from curser to left (CMD+Left) selects only one char:

Screen.Recording.2025-01-27.at.12.27.21.mov

Cut via CMD+X leaves an x behind:

Screen.Recording.2025-01-27.at.12.27.31.mov

[floers]

For me it works as well on Linux. My collegues have Mac OS and we just found out.

[ogoffart]

I have a suspicion that this is because we use 'CTRL' for shortcut on most platform, only for mac we map that to CMD. We do use cfg!(target_os = "macos") in a few places. But of course that doesn't work on wasm. We'd need a runtime browser check instead.
This is just a theory, I haven't tried on mac.