默认打印机

electron/main.js

@@ -147,10 +147,31 @@ ipcMain.handle("fetch-pdf", async (event, pdfUrl) => {
   });
 });
 
+ipcMain.handle("get-printers", async (event) => {
+  try {
+    const webContents = event.sender;
+    if (!webContents) {
+      return { success: false, error: "No webContents available" };
+    }
+
+    if (typeof webContents.getPrintersAsync === "function") {
+      const printers = await webContents.getPrintersAsync();
+      return { success: true, printers };
+    }
+
+    const printers = webContents.getPrinters();
+    return { success: true, printers };
+  } catch (error) {
+    log.error("Failed to get printers:", error);
+    return { success: false, error: error.message };
+  }
+});
+
 // 处理PDF打印请求
-ipcMain.handle("print-pdf", async (event, pdfDataOrUrl) => {
+ipcMain.handle("print-pdf", async (event, pdfDataOrUrl, printOptions = {}) => {
   let printWindow = null;
   let tempFilePath = null;
+  const targetPrinterName = printOptions?.printerName;
 
   try {
     let pdfPath = pdfDataOrUrl;
@@ -210,14 +231,20 @@ ipcMain.handle("print-pdf", async (event, pdfDataOrUrl) => {
 
     // 静默打印（直接调用系统打印对话框）
     return new Promise((resolve) => {
-      printWindow.webContents.print(
-        {
-          silent: false, // 显示打印对话框
-          printBackground: true,
-          margins: {
-            marginType: "none",
-          },
+      const basePrintOptions = {
+        silent: Boolean(targetPrinterName),
+        printBackground: true,
+        margins: {
+          marginType: "none",
         },
+      };
+
+      if (targetPrinterName) {
+        basePrintOptions.deviceName = targetPrinterName;
+      }
+
+      printWindow.webContents.print(
+        basePrintOptions,
         (success, errorType) => {
           // 清理临时文件
           if (tempFilePath && fs.existsSync(tempFilePath)) {

electron/preload.js

@@ -4,7 +4,9 @@ contextBridge.exposeInMainWorld("electronAPI", {
   // 获取PDF（绕过CORS）
   fetchPdf: (pdfUrl) => ipcRenderer.invoke("fetch-pdf", pdfUrl),
   // 打印PDF
-  printPdf: (pdfUrl) => ipcRenderer.invoke("print-pdf", pdfUrl),
+  printPdf: (pdfUrl, options) => ipcRenderer.invoke("print-pdf", pdfUrl, options),
+  // 获取打印机列表
+  getPrinters: () => ipcRenderer.invoke("get-printers"),
   startIdCardListen: () => ipcRenderer.invoke("start_idcard_listen"),
   stopIdCardListen: () => ipcRenderer.invoke("stop_idcard_listen"),
   onIdCardData: (callback) =>