添加鼠标事件拦截

src/xcb/window.c

@@ -361,3 +361,15 @@ void set_window_fullscreen_state(xcb_window_t window, bool fullscreen) {
   xcb_change_property(conn, XCB_PROP_MODE_REPLACE, window, atom,
                       XCB_ATOM_WINDOW, 32, data_len, &atom);
 }
+
+void ungrab_any_button(xcb_window_t window) {
+  xcb_ungrab_button(conn, XCB_BUTTON_INDEX_ANY, window, XCB_MOD_MASK_ANY);
+}
+
+void grab_button(xcb_window_t window, uint8_t button, uint16_t modifiers) {
+  uint8_t owner_events = false; /* 事件仅发送给抓取者，不发送给其他窗口 */
+  uint16_t event_mask =
+    XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE;
+  xcb_grab_button(conn, owner_events, window, event_mask, XCB_GRAB_MODE_SYNC,
+                  XCB_GRAB_MODE_ASYNC, XCB_NONE, XCB_NONE, button, modifiers);
+}