修复打印

electron/main.js

@@ -2,6 +2,8 @@ const { app, BrowserWindow, ipcMain } = require("electron");
 const path = require("path");
 const https = require("https");
 const http = require("http");
+const fs = require("fs");
+const os = require("os");
 
 let mainWindow = null;
 const { Worker } = require("worker_threads");
@@ -127,47 +129,92 @@ ipcMain.handle("fetch-pdf", async (event, pdfUrl) => {
 });
 
 // 处理PDF打印请求
-ipcMain.handle("print-pdf", async (event, pdfUrl) => {
+ipcMain.handle("print-pdf", async (event, pdfDataOrUrl) => {
+  let printWindow = null;
+  let tempFilePath = null;
+  
   try {
+    // 如果是 base64 data URI，转换为临时文件
+    let pdfPath = pdfDataOrUrl;
+    if (pdfDataOrUrl.startsWith("data:application/pdf;base64,")) {
+      const base64Data = pdfDataOrUrl.replace("data:application/pdf;base64,", "");
+      const buffer = Buffer.from(base64Data, "base64");
+      
+      // 创建临时文件
+      tempFilePath = path.join(os.tmpdir(), `print_${Date.now()}.pdf`);
+      fs.writeFileSync(tempFilePath, buffer);
+      pdfPath = `file://${tempFilePath}`;
+      log.info("PDF written to temp file:", tempFilePath);
+    }
+
     // 创建一个隐藏的窗口用于加载PDF
-    const printWindow = new BrowserWindow({
+    printWindow = new BrowserWindow({
       width: 800,
       height: 600,
       show: false,
       webPreferences: {
-        nodeIntegration: false,
-        contextIsolation: true,
+        plugins: true, // 启用插件以支持 PDF 查看
       },
     });
 
     // 加载PDF
-    await printWindow.loadURL(pdfUrl);
+    await printWindow.loadURL(pdfPath);
+    log.info("PDF loaded for printing");
 
-    // 等待页面加载完成
-    await new Promise((resolve) => {
-      printWindow.webContents.on("did-finish-load", resolve);
-    });
+    // 等待更长时间确保 PDF 完全渲染
+    await new Promise(resolve => setTimeout(resolve, 2000));
 
     // 静默打印（直接调用系统打印对话框）
-    printWindow.webContents.print(
-      {
-        silent: false, // 显示打印对话框
-        printBackground: true,
-        margins: {
-          marginType: "none",
+    return new Promise((resolve) => {
+      printWindow.webContents.print(
+        {
+          silent: false, // 显示打印对话框
+          printBackground: true,
+          margins: {
+            marginType: "none",
+          },
         },
-      },
-      (success, errorType) => {
-        printWindow.close();
-        if (!success) {
-          console.error("Print failed:", errorType);
-        }
-      }
-    );
+        (success, errorType) => {
+          // 清理临时文件
+          if (tempFilePath && fs.existsSync(tempFilePath)) {
+            try {
+              fs.unlinkSync(tempFilePath);
+              log.info("Temp file deleted");
+            } catch (err) {
+              log.error("Failed to delete temp file:", err);
+            }
+          }
 
-    return { success: true };
+          // 关闭窗口
+          if (printWindow && !printWindow.isDestroyed()) {
+            printWindow.close();
+          }
+
+          if (!success) {
+            log.error("Print failed:", errorType);
+            resolve({ success: false, error: errorType });
+          } else {
+            log.info("Print completed");
+            resolve({ success: true });
+          }
+        }
+      );
+    });
   } catch (error) {
-    console.error("Print error:", error);
+    log.error("Print error:", error);
+    
+    // 清理临时文件
+    if (tempFilePath && fs.existsSync(tempFilePath)) {
+      try {
+        fs.unlinkSync(tempFilePath);
+      } catch (err) {
+        log.error("Failed to delete temp file:", err);
+      }
+    }
+    
+    if (printWindow && !printWindow.isDestroyed()) {
+      printWindow.close();
+    }
     return { success: false, error: error.message };
   }
 });

src/pages/UI8/UI8.tsx

@@ -66,9 +66,15 @@ const UI8: React.FC = () => {
       return;
     }
 
+    if (!pdfData) {
+      alert("PDF 尚未加载完成，请稍候");
+      return;
+    }
+
     setIsPrinting(true);
     try {
-      const result = await window.electronAPI.printPdf(PDF_URL);
+      // 使用已加载的 PDF 数据（base64），避免重复下载
+      const result = await window.electronAPI.printPdf(pdfData);
       if (!result.success) {
         alert(`打印失败: ${result.error || "未知错误"}`);
       }