Function with_export_webview

src/apps/desktop/src/api/miniapp_export_api.rs:92–121

(
    app: &AppHandle<R>,
    html: String,
    width: u32,
    height: u32,
    task: F,
)

}

async fn with_export_webview<R: tauri::Runtime, F, Fut, T>(
    app: &AppHandle<R>,
    html: String,
    width: u32,
    height: u32,
    task: F,
) -> Result<T, String>
where
    F: FnOnce(tauri::Webview<R>) -> Fut,
    Fut: std::future::Future<Output = Result<T, String>>,
{
    let window = ensure_export_host_window(app, width, height)?;
    let wrapped = wrap_slide_html(&html, width, height);
    let (url, temp_html) = file_url_for_export_html(app, &wrapped)?;

    window
        .navigate(url)
        .map_err(|error| format!("Failed to navigate export webview: {error}"))?;

    tokio::time::sleep(Duration::from_millis(RENDER_SETTLE_MS)).await;

    let webview = app
        .get_webview(EXPORT_HOST_LABEL)
        .ok_or_else(|| format!("Export webview is not ready: {EXPORT_HOST_LABEL}"))?;

    let result = task(webview).await;
    let _ = std::fs::remove_file(&temp_html);
    let _ = window.hide();
    result
}

#[tauri::command]
pub async fn miniapp_render_slide_page(