fix: 修复打印中文乱码、XLS导入100条截断、Nginx图片路由

- 打印改为 Web 平台用 HTML+CSS 方案，避免 pdf 包中文字体 bug - 新增 print_util.dart 条件导入层（web/stub），彻底隔离 platform channel - XLS 导入不再依赖 DIMENSIONS 记录的 MaxRow，改为读到连续5空行停止 - Nginx /images/ 加 ^~ 前缀，防止 .jpg 正则 location 拦截 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-04-30 22:07:17 +08:00
parent 6fc6b52631
commit 50b139c97a
9 changed files with 131 additions and 35 deletions
@@ -0,0 +1,13 @@
+import 'dart:typed_data';
+import 'print_util_stub.dart'
+    if (dart.library.js_interop) 'print_util_web.dart';
+
+/// 打印商品标签（二维码 + 名称 + 编号）。
+/// Web：生成 HTML 弹出新窗口调用浏览器打印。
+/// 非 Web：生成 PDF 用 printing 包调起原生打印。
+Future<void> printProductLabel({
+  required Uint8List qrBytes,
+  required String name,
+  required String code,
+  String? spec,
+}) => printProductLabelImpl(qrBytes: qrBytes, name: name, code: code, spec: spec);
@@ -0,0 +1,38 @@
+import 'package:flutter/services.dart';
+import 'package:pdf/pdf.dart';
+import 'package:pdf/widgets.dart' as pw;
+import 'package:printing/printing.dart';
+
+Future<void> printProductLabelImpl({
+  required Uint8List qrBytes,
+  required String name,
+  required String code,
+  String? spec,
+}) async {
+  final fontData = await rootBundle.load('assets/fonts/NotoSansSC-Regular.ttf');
+  final font = pw.Font.ttf(fontData);
+  final doc = pw.Document();
+  final qrImage = pw.MemoryImage(qrBytes);
+  doc.addPage(pw.Page(
+    pageFormat: PdfPageFormat.a4,
+    build: (_) => pw.Center(
+      child: pw.Column(
+        mainAxisSize: pw.MainAxisSize.min,
+        children: [
+          pw.Image(qrImage, width: 200, height: 200),
+          pw.SizedBox(height: 12),
+          pw.Text(name,
+              style: pw.TextStyle(
+                  font: font, fontSize: 18, fontWeight: pw.FontWeight.bold)),
+          pw.SizedBox(height: 4),
+          pw.Text('编号：$code',
+              style: pw.TextStyle(font: font, fontSize: 13)),
+          if ((spec ?? '').isNotEmpty)
+            pw.Text('规格：$spec',
+                style: pw.TextStyle(font: font, fontSize: 13)),
+        ],
+      ),
+    ),
+  ));
+  await Printing.layoutPdf(onLayout: (_) async => doc.save());
+}
@@ -0,0 +1,46 @@
+import 'dart:convert';
+import 'dart:js_interop';
+import 'dart:typed_data';
+import 'package:web/web.dart' as web;
+
+Future<void> printProductLabelImpl({
+  required Uint8List qrBytes,
+  required String name,
+  required String code,
+  String? spec,
+}) async {
+  final base64Img = base64Encode(qrBytes);
+  final specHtml = (spec != null && spec.isNotEmpty)
+      ? '<p style="margin:4px 0;font-size:13px;color:#555;">规格：$spec</p>'
+      : '';
+  final html = '''<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<style>
+  *{box-sizing:border-box;margin:0;padding:0;}
+  body{display:flex;justify-content:center;align-items:center;min-height:100vh;
+       font-family:"PingFang SC","Microsoft YaHei",sans-serif;}
+  .label{text-align:center;padding:24px;}
+  img{width:200px;height:200px;display:block;margin:0 auto;}
+  h2{margin:12px 0 4px;font-size:18px;font-weight:bold;}
+  p{margin:4px 0;font-size:13px;color:#444;}
+</style>
+</head>
+<body>
+  <div class="label">
+    <img src="data:image/png;base64,$base64Img"/>
+    <h2>$name</h2>
+    <p>编号：$code</p>
+    $specHtml
+  </div>
+  <script>window.onload=function(){window.print();};</script>
+</body>
+</html>''';
+
+  final win = web.window.open('', '_blank');
+  if (win != null) {
+    win.document.write(html.toJS);
+    win.document.close();
+  }
+}