wangjia/jiu
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases 130 Wiki Activity

feat(client): 标签 TSPL 裸发支持 Windows（winspool WritePrinter）

Browse Source 
- 抽出 _findThermalPrinter（macOS: lpstat -e；Windows: Printing.listPrinters）
  与 _sendRaw（macOS/Linux: lp -o raw；Windows: winspool WritePrinter RAW）
- 新增 _winRawPrint：OpenPrinter/StartDocPrinter(RAW)/WritePrinter 直送裸字节
- 位图渲染与 TSPL 生成跨平台复用；macOS 行为不变
- 依赖新增 win32/ffi（仅 Windows 运行时调用，已 Platform.isWindows 守卫）

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
wangjia
2026-06-13 20:42:49 +08:00
parent d966951b6b
commit 0714fb8a1b
3 changed files with 225 additions and 138 deletions
Download Patch File Download Diff File Expand all files Collapse all files
client/lib/core/utils/print_util_stub.dart
+111 -27
View File
@@ -2,6 +2,18 @@ import 'dart:io' show Platform, Process, File, Directory;
import 'dart:convert' show ascii;
import 'dart:typed_data';
import 'dart:ui' as ui;
import 'dart:ffi';
import 'package:ffi/ffi.dart';
import 'package:win32/win32.dart'
show
OpenPrinter,
StartDocPrinter,
StartPagePrinter,
WritePrinter,
EndPagePrinter,
EndDocPrinter,
ClosePrinter,
DOC_INFO_1;
import 'package:flutter/foundation.dart' show kIsWeb, debugPrint;
import 'package:flutter/services.dart';
import '../errors/error_reporter.dart';
@@ -39,26 +51,105 @@ const _ink = PdfColor(0.067, 0.067, 0.067); // #111 body text
// 得力 DL-888B 等热敏机走系统打印(CUPS 通用驱动)会多走纸/空白，必须发原生 TSPL。
// 直接画位图而非走 PDF 光栅化：避免二维码渲染丢失、SIZE 用整数避免多走纸。
/// 查找热敏标签机的 CUPS 队列名（名字含 DL-888 / 888B / Deli）
Future<String?> _findThermalQueue() async {
try {
final r = await Process.run('lpstat', ['-e']);
if (r.exitCode != 0) return null;
for (final raw in (r.stdout as String).split('\n')) {
final q = raw.trim();
if (q.isEmpty) continue;
final lo = q.toLowerCase();
if (lo.contains('dl-888') || lo.contains('dl_888') ||
lo.contains('888b') || lo.contains('deli')) {
return q;
bool _isThermalName(String n) {
final lo = n.toLowerCase();
return lo.contains('dl-888') ||
lo.contains('dl_888') ||
lo.contains('888b') ||
lo.contains('deli');
}
/// 查找热敏标签机（名字含 DL-888 / 888B / Deli）。
/// macOS: CUPS 队列名(lpstat -e)；Windows: 打印机名(Printing.listPrinters)。
Future<String?> _findThermalPrinter() async {
if (Platform.isMacOS) {
try {
final r = await Process.run('lpstat', ['-e']);
if (r.exitCode == 0) {
for (final raw in (r.stdout as String).split('\n')) {
final q = raw.trim();
if (q.isNotEmpty && _isThermalName(q)) return q;
}
}
} catch (e) {
debugPrint('[label] lpstat 失败: $e');
}
} catch (e) {
debugPrint('[label] lpstat 失败: $e');
return null;
}
if (Platform.isWindows) {
try {
for (final p in await Printing.listPrinters()) {
if (_isThermalName(p.name)) return p.name;
}
} catch (e) {
debugPrint('[label] listPrinters 失败: $e');
}
return null;
}
return null;
}
/// 把裸 TSPL 字节发送到打印机：
/// macOS/Linux 用 `lp -o raw`；Windows 用 winspool WritePrinter。失败抛异常。
Future<void> _sendRaw(String printer, Uint8List tspl) async {
if (Platform.isWindows) {
if (!_winRawPrint(printer, tspl)) {
throw Exception('Windows 裸发失败: $printer');
}
return;
}
final f = File(
'${Directory.systemTemp.path}/label_${DateTime.now().millisecondsSinceEpoch}.tspl');
await f.writeAsBytes(tspl, flush: true);
final r = await Process.run('lp', ['-d', printer, '-o', 'raw', f.path]);
debugPrint('[label] lp exit=${r.exitCode} out=${r.stdout} err=${r.stderr}');
if (r.exitCode != 0) {
throw Exception('lp 裸发失败(exit ${r.exitCode}): ${r.stderr}');
}
}
/// Windows: 通过 winspool 以 RAW 数据类型把字节直接送进打印队列
bool _winRawPrint(String printerName, Uint8List data) {
final pName = printerName.toNativeUtf16();
final phPrinter = calloc<IntPtr>();
final docName = 'jiu label'.toNativeUtf16();
final dataType = 'RAW'.toNativeUtf16();
final docInfo = calloc<DOC_INFO_1>();
final pcWritten = calloc<Uint32>();
final pData = calloc<Uint8>(data.length);
try {
if (OpenPrinter(pName, phPrinter, nullptr) == 0) {
debugPrint('[label] OpenPrinter 失败: $printerName');
return false;
}
final h = phPrinter.value;
docInfo.ref
..pDocName = docName
..pOutputFile = nullptr
..pDatatype = dataType;
if (StartDocPrinter(h, 1, docInfo) == 0) {
ClosePrinter(h);
return false;
}
StartPagePrinter(h);
pData.asTypedList(data.length).setAll(0, data);
final ok = WritePrinter(h, pData.cast(), data.length, pcWritten);
EndPagePrinter(h);
EndDocPrinter(h);
ClosePrinter(h);
debugPrint('[label] WritePrinter ok=$ok written=${pcWritten.value}');
return ok != 0;
} finally {
calloc.free(pName);
calloc.free(phPrinter);
calloc.free(docName);
calloc.free(dataType);
calloc.free(docInfo);
calloc.free(pcWritten);
calloc.free(pData);
}
}
/// 在 canvas 上画一行文字（黑色，单行不换行，CJK 走系统字体回退）
void _drawText(ui.Canvas canvas, String s, double x, double y, double size,
double maxW, {bool bold = false, bool center = false}) {
@@ -107,10 +198,10 @@ Future<bool> _printFlatLabelThermal({
required String date,
required Uint8List qrBytes,
}) async {
if (kIsWeb || !Platform.isMacOS) return false; // 目前仅 macOS（Windows 待加）
final queue = await _findThermalQueue();
debugPrint('[label] thermal queue = $queue');
if (queue == null) return false;
if (kIsWeb || !(Platform.isMacOS || Platform.isWindows)) return false;
final printer = await _findThermalPrinter();
debugPrint('[label] thermal printer = $printer');
if (printer == null) return false;
const w = 320, h = 160; // 40×20mm @203dpi
final recorder = ui.PictureRecorder();
@@ -182,15 +273,8 @@ Future<bool> _printFlatLabelThermal({
out.add(ascii.encode('\r\nPRINT 1,1\r\n'));
final tspl = out.toBytes();
final f = File(
'${Directory.systemTemp.path}/label_${DateTime.now().millisecondsSinceEpoch}.tspl');
await f.writeAsBytes(tspl, flush: true);
debugPrint('[label] flat tspl ${tspl.length}B -> lp -d $queue -o raw ${f.path}');
final r = await Process.run('lp', ['-d', queue, '-o', 'raw', f.path]);
debugPrint('[label] lp exit=${r.exitCode} out=${r.stdout} err=${r.stderr}');
if (r.exitCode != 0) {
throw Exception('lp 裸发失败(exit ${r.exitCode}): ${r.stderr}');
}
debugPrint('[label] flat tspl ${tspl.length}B -> $printer');
await _sendRaw(printer, tspl);
return true;
}