🌱 监听&获取文本缩放

#192

src-tauri/src/plugins/text_scale.rs

@@ -0,0 +1,43 @@
+// 监听系统文本放缩
+// @since Beta v0.9.1
+
+use crate::utils;
+use std::{thread, time::Duration};
+use tauri::{AppHandle, Emitter};
+use widestring::U16CString;
+use windows_sys::Win32::Foundation::ERROR_SUCCESS;
+use windows_sys::Win32::System::Registry::{
+  RegNotifyChangeKeyValue, RegOpenKeyExW, HKEY, HKEY_CURRENT_USER, KEY_NOTIFY, KEY_READ,
+  REG_NOTIFY_CHANGE_LAST_SET,
+};
+
+pub fn init(app: AppHandle) {
+  thread::spawn(move || unsafe {
+    let subkey = U16CString::from_str("Software\\Microsoft\\Accessibility").unwrap();
+    let mut hkey: HKEY = std::ptr::null_mut();
+
+    let status =
+      RegOpenKeyExW(HKEY_CURRENT_USER, subkey.as_ptr(), 0, KEY_READ | KEY_NOTIFY, &mut hkey);
+
+    if status != ERROR_SUCCESS {
+      eprintln!("❌ 无法打开注册表键: {}", status);
+      return;
+    }
+
+    loop {
+      let notify_status =
+        RegNotifyChangeKeyValue(hkey, 0, REG_NOTIFY_CHANGE_LAST_SET, std::ptr::null_mut(), 0);
+
+      if notify_status == ERROR_SUCCESS {
+        if let Ok(scale) = utils::read_text_scale_factor() {
+          let _ = app.emit("text_scale_change", scale);
+        }
+      } else {
+        eprintln!("❌ 注册表监听失败: {}", notify_status);
+        break;
+      }
+
+      thread::sleep(Duration::from_secs(1));
+    }
+  });
+}