fix: 从按键页切换可打断

src-tauri/src/keybindings.rs

@@ -5,6 +5,10 @@ use std::{
     fs,
     io::Read,
     path::{Path, PathBuf},
+    sync::{
+        Arc,
+        atomic::{AtomicBool, Ordering},
+    },
 };
 
 use super::{
@@ -726,9 +730,35 @@ fn replace_mouse_action(content: &str, action: &str, values: &[String]) -> Resul
 }
 
 #[tauri::command]
-pub(super) fn get_key_bindings(
+pub(super) async fn get_key_bindings(
     game_path: String,
     language: String,
+    cancel: Option<bool>,
+) -> Result<KeyBindingCatalog, String> {
+    let cancelled = Arc::new(AtomicBool::new(false));
+    let worker_cancelled = Arc::clone(&cancelled);
+    let worker = tauri::async_runtime::spawn_blocking(move || {
+        get_key_bindings_impl(game_path, language, &worker_cancelled)
+    });
+    // 默认允许取消：IPC 请求被取消（页面卸载、WebView 销毁）时 Tauri 会 drop
+    // 本 future，guard 随即通知 worker 在下一个检查点退出，结果随之丢弃。
+    // 传 cancel: true 可显式禁用（如页面内的手动刷新）。
+    struct CancelOnDrop(Arc<AtomicBool>);
+    impl Drop for CancelOnDrop {
+        fn drop(&mut self) {
+            self.0.store(true, Ordering::Relaxed);
+        }
+    }
+    let _guard = (!cancel.unwrap_or(false)).then(|| CancelOnDrop(cancelled));
+    worker
+        .await
+        .map_err(|error| format!("读取按键配置失败：{error}"))?
+}
+
+fn get_key_bindings_impl(
+    game_path: String,
+    language: String,
+    cancelled: &AtomicBool,
 ) -> Result<KeyBindingCatalog, String> {
     let normalized = normalize_game_path_impl(&game_path);
     let game_path = PathBuf::from(normalized);
@@ -782,6 +812,9 @@ pub(super) fn get_key_bindings(
     config_files.sort_by_key(|entry| entry.file_name().to_string_lossy().to_ascii_lowercase());
 
     for config in config_files {
+        if cancelled.load(Ordering::Relaxed) {
+            return Err("已取消读取按键配置".to_string());
+        }
         let file_name = config.file_name().to_string_lossy().to_string();
         let source = config_source_name(&file_name);
         let Ok(content) = fs::read_to_string(config.path()) else {
@@ -973,8 +1006,12 @@ mod tests {
         if !path.join("Saves").join("settings.celeste").is_file() {
             return;
         }
-        let catalog = get_key_bindings(path.to_string_lossy().into_owned(), "zh-CN".to_string())
-            .expect("local key bindings should be readable");
+        let catalog = get_key_bindings_impl(
+            path.to_string_lossy().into_owned(),
+            "zh-CN".to_string(),
+            &AtomicBool::new(false),
+        )
+        .expect("local key bindings should be readable");
         assert!(
             catalog
                 .entries

src/celemod-ui/src/routes/KeyBindings.tsx

@@ -236,22 +236,40 @@ export const KeyBindings = () => {
   const [selectedConflict, setSelectedConflict] = useState("");
   const [showDisabled, setShowDisabled] = useState(false);
   const [saving, setSaving] = useState("");
+  const requestId = useRef(0);
 
   const refresh = useCallback(() => {
     if (!gamePath) return;
+    const currentRequest = ++requestId.current;
     setLoading(true);
     setError("");
     void callRemote<KeyBindingCatalog>(
       "get_key_bindings",
       gamePath,
       currentLang,
     )
-      .then(setCatalog)
-      .catch((reason) => setError(String(reason)))
-      .finally(() => setLoading(false));
+      .then((data) => {
+        if (currentRequest !== requestId.current) return;
+        setCatalog(data);
+      })
+      .catch((reason) => {
+        if (currentRequest !== requestId.current) return;
+        setError(String(reason));
+      })
+      .finally(() => {
+        if (currentRequest === requestId.current) setLoading(false);
+      });
   }, [currentLang, gamePath]);
 
-  useEffect(refresh, [refresh]);
+  useEffect(() => {
+    const requestScope = requestId;
+    refresh();
+    // 卸载时作废旧请求：页面切换中途到达的响应不再写入状态，
+    // 下次挂载会以新序号重新加载。
+    return () => {
+      requestScope.current += 1;
+    };
+  }, [refresh]);
 
   const consideredEntries = useMemo(
     () =>

src/celemod-ui/src/tauri/commands.ts

@@ -117,7 +117,7 @@ const parameterNames: Record<string, string[]> = {
   get_mod_cache_status: [],
   get_database_path: [],
   start_miaonet_oauth: ["gamePath", "onEvent"],
-  get_key_bindings: ["gamePath", "language"],
+  get_key_bindings: ["gamePath", "language", "cancel"],
   update_key_binding: ["gamePath", "request"],
 };