libnyanpasu/clash-nyanpasu · warning · anyhow::Error

failed to get miniaturize button

Error message

failed to get miniaturize button

What it means

Same traffic-light repositioning path as the close button, but for the miniaturize button: NSWindow.standardWindowButton(.miniaturizeButton) returned nil. The code needs all three buttons to compute the title-bar container, so it aborts with this error.

Source

Thrown at backend/tauri/src/window.rs:916

    impl From<Position> for (f64, f64) {
        fn from(value: Position) -> Self {
            (value.x, value.y)
        }
    }

    fn set_traffic_lights_pos(
        window: objc2::rc::Retained<objc2_app_kit::NSWindow>,
        pos: Position,
    ) -> anyhow::Result<()> {
        use objc2_app_kit::NSWindowButton;
        use objc2_foundation::NSRect;
        let close = window
            .standardWindowButton(NSWindowButton::CloseButton)
            .ok_or(anyhow::anyhow!("failed to get close button"))?;
        let miniaturize = window
            .standardWindowButton(NSWindowButton::MiniaturizeButton)
            .ok_or(anyhow::anyhow!("failed to get miniaturize button"))?;
        let zoom = window
            .standardWindowButton(NSWindowButton::ZoomButton)
            .ok_or(anyhow::anyhow!("failed to get zoom button"))?;

        let title_bar_container_view = unsafe {
            close
                .superview()
                .and_then(|view| view.superview())
                .ok_or(anyhow::anyhow!("failed to get title bar container view"))?
        };

        let close_rect = close.frame();
        let button_height = close_rect.size.height;

        let title_bar_frame_height = button_height + pos.y;
        let mut title_bar_rect = title_bar_container_view.frame();
        title_bar_rect.size.height = title_bar_frame_height;
        title_bar_rect.origin.y = window.frame().size.height - title_bar_frame_height;

View on GitHub (pinned to f7dbce2997)

Solutions

1. Ensure the window style mask includes .miniaturizable (Tauri: default decorations, not decorations:false)
2. Call set_traffic_lights_pos after the window is shown and retry if buttons are not yet available
3. Degrade gracefully: if any button is nil, skip repositioning with a warning rather than erroring
4. Verify with Objective-C that buttons exist: [window standardWindowButton:] before applying offsets

Example fix

// before
let miniaturize = window
    .standardWindowButton(NSWindowButton::MiniaturizeButton)
    .ok_or(anyhow::anyhow!("failed to get miniaturize button"))?;
// after
let Some(miniaturize) = window.standardWindowButton(NSWindowButton::MiniaturizeButton) else {
    log::warn!("miniaturize button unavailable; skipping traffic light reposition");
    return Ok(());
};

if window.standardWindowButton(NSWindowButton::MiniaturizeButton).is_none() {
    return Ok(()); // window lacks miniaturize; skip repositioning
}

fn has_miniaturize(window: &NSWindow) -> bool {
    window.standardWindowButton(NSWindowButton::MiniaturizeButton).is_some()
}

match apply_traffic_lights_pos(window, pos) {
    Err(e) => log::warn!("traffic light reposition skipped: {e}"),
    Ok(()) => {}
}

When it happens

Trigger: set_traffic_lights_pos called on a window whose style mask lacks .miniaturizable, an undecorated/borderless Tauri window, or before the window is visible so AppKit hasn't created the buttons.

Common situations: Windows created with decorations:false; style masks customized to remove the minimize button; calling the API during window setup before performDrag/appearance; dialogs/utility windows with restricted button sets.

Related errors

• failed to get close button
• failed to get miniaturize button
• failed to get zoom button
• failed to get close button
• failed to get zoom button

AI-assisted analysis of libnyanpasu/clash-nyanpasu@f7dbce2997 (2026-09-08). Data as JSON: /api/errors/493414fba0c10be4. Report an issue: GitHub.