fix(menu): duplicate event binding & position when using keyboard

Signed-off-by: 晨叶梦春 <wuziqian211@126.com>

src/tchmaterial_parser/ui/download_panel.py

@@ -36,12 +36,20 @@ def parse_and_copy() -> None: # 解析并复制链接
         messagebox.showwarning("警告", "以下 “行” 无法解析：\n" + "\n".join(failed_urls))
 
     if resource_urls:
-        url_text.clipboard_clear()
-        url_text.clipboard_append("\n".join(resource_urls)) # 将链接复制到剪贴板
-        messagebox.showinfo(
-            "提示",
-            f'资源链接已复制到剪贴板。\n注意：链接可能无法直接下载，需要加上以下 HTTP 标头才能下载{"（以下标头含有隐私信息，请勿分享给别人）" if config.access_token else ""}：\n\nAuthorization: Bearer {config.access_token or "0"}\nX-ND-AUTH: MAC id="{config.access_token or "0"}",nonce="0",mac="0"'
-        )
+        try:
+            resource_urls_str = "\n".join(resource_urls)
+            url_text.clipboard_clear()
+            url_text.clipboard_append(resource_urls_str) # 将链接复制到剪贴板
+            if url_text.clipboard_get() == resource_urls_str: # 检查剪贴板内容是否正确
+                messagebox.showinfo(
+                    "提示",
+                    f'资源链接已复制到剪贴板。\n注意：链接可能无法直接下载，需要加上以下 HTTP 标头才能下载{"（以下标头含有隐私信息，请勿分享给别人）" if config.access_token else ""}：\n\nAuthorization: Bearer {config.access_token or "0"}\nX-ND-AUTH: MAC id="{config.access_token or "0"}",nonce="0",mac="0"'
+                )
+            else:
+                messagebox.showerror("错误", "无法将链接复制到剪贴板，请手动复制。")
+        except Exception as e:
+            print_error(e)
+            messagebox.showerror("错误", "无法将链接复制到剪贴板，请手动复制。")
 
 def download() -> None: # 下载资源文件
     global download_states

src/tchmaterial_parser/ui/widgets.py

@@ -9,9 +9,12 @@ from . import runtime
 from .theme import register_themed_widget
 from ..platform_utils import os_name
 
+root_handlers_bound: dict[tk.Menu, bool] = {} # 用于记录每个右键菜单是否已绑定根窗口事件，避免重复绑定
+
 def bind_context_menu(parent: tk.Widget, type: Literal["normal", "noundo", "readonly"] = "normal") -> None: # 创建右键菜单
     context_menu = tk.Menu(parent, tearoff=False, font="AppBodyFont")
     register_themed_widget(context_menu)
+    root_handlers_bound[context_menu] = False # 初始化为未绑定根窗口事件
     if type == "normal":
         context_menu.add_command(label="撤销 (U)", underline=4, accelerator="Ctrl+Z", command=lambda: parent.event_generate("<<Undo>>"))
         context_menu.add_separator()
@@ -23,17 +26,37 @@ def bind_context_menu(parent: tk.Widget, type: Literal["normal", "noundo", "read
         context_menu.add_separator()
     context_menu.add_command(label="全选 (A)", underline=4, accelerator="Ctrl+A", command=lambda: parent.event_generate("<<SelectAll>>"))
 
-    def show_context_menu(event: tk.Event) -> None:
-        context_menu.post(event.x_root, event.y_root)
+    def show_context_menu(event: tk.Event, keyboard: bool = False) -> None:
+        if not keyboard and event.x_root >= 0 and event.y_root >= 0:
+            context_menu.post(event.x_root, event.y_root)
+        else: # 通过键盘打开菜单或 x_root 与 y_root 无效时
+            try: # 优先尝试在插入点（文本控件）位置显示菜单
+                bbox = parent.bbox("insert") # 此处可能抛异常或返回 None
+                if bbox:
+                    bx, by, bw, bh = bbox
+                    x_root = parent.winfo_rootx() + bx
+                    y_root = parent.winfo_rooty() + by + bh
+                else:
+                    raise Exception("无法获取插入点位置")
+            except Exception: # 再尝试使用鼠标指针位置（如果有）
+                px, py = parent.winfo_pointerx(), parent.winfo_pointery()
+                if px >= 0 and py >= 0:
+                    x_root, y_root = px, py
+                else: # 最后回退到控件中心
+                    x_root = round(parent.winfo_rootx() + parent.winfo_width() // 2)
+                    y_root = round(parent.winfo_rooty() + parent.winfo_height() // 2)
+            context_menu.post(x_root, y_root)
         context_menu.bind("<FocusOut>", lambda e: context_menu.unpost()) # 绑定失焦事件，失焦时自动关闭菜单
         context_menu.bind("<Escape>", lambda e: context_menu.unpost(), add="+") # 绑定 Esc 键，按下时关闭菜单
-        runtime.root.bind("<Escape>", lambda e: context_menu.unpost(), add="+") # 绑定 Esc 键，按下时关闭菜单
-        runtime.root.bind("<Button-1>", lambda e: context_menu.unpost(), add="+") # 绑定左键点击事件，点击其他地方也关闭菜单
+        if not root_handlers_bound.get(context_menu):
+            root_handlers_bound[context_menu] = True
+            runtime.root.bind("<Escape>", lambda e: context_menu.unpost(), add="+") # 绑定 Esc 键，按下时关闭菜单
+            runtime.root.bind("<Button-1>", lambda e: context_menu.unpost(), add="+") # 绑定左键点击事件，点击其他地方也关闭菜单
 
     # 绑定右键菜单到文本框
     parent.bind("<Button-3>", show_context_menu) # 鼠标右键
-    parent.bind("<Menu>", show_context_menu) # BUG: 按下菜单键不起作用
-    parent.bind("<Shift-F10>", show_context_menu)
+    parent.bind("<Menu>", lambda e: show_context_menu(e, True)) # BUG: 按下菜单键不起作用
+    parent.bind("<Shift-F10>", lambda e: show_context_menu(e, True))
     if os_name == "Darwin":
         parent.bind("<Control-Button-1>", show_context_menu) # Command + 鼠标左键
         parent.bind("<Button-2>", show_context_menu) # 鼠标中键