`WebView` doesn't render on Linux

[sectore]

cargo run -p gallery

guise: failed to create webview: the window handle kind is not supported
[...]

I tried the following (on Linux / Ubuntu / Wayland):

• Force gpui to use X11 backend.
• Setting WAYLAND_DISPLAY doesn't help either and panics:

thread 'main' panicked at gpui-0.2.2/src/platform/linux/x11/window.rs:316:9:
not implemented

By digging more into it by using Claude here are its summary:

wry's WebKitGTK backend only accepts an Xlib raw-window-handle when embedding as a child (wry0.55.1,src/webkitgtk/mod.rs), but gpui's Wayland backend hands it a Wayland handle instead (rejected), and gpui's X11 backend never implemented HasWindowHandle/HasDisplayHandleat all —X11Window::window_handle()is a literalunimplemented!() (gpui0.2.2,src/platform/linux/x11/window.rs`; still true on Zed's current main). So neither Linux backend currently has a working path.

As long as WebView is not supported for Linux in guise, my suggestions are:

• A) make webview feature optional
  or
• B) disable webview feature for gallery (and tailor?)