Add QR code support for some Printers, and fix bug when split kanji sentence

lib/esc_pos_utils.dart

@@ -13,3 +13,4 @@ export './src/enums.dart';
 export './src/pos_column.dart';
 export './src/pos_styles.dart';
 export './src/ticket.dart';
+export './src/qrcode.dart';

lib/src/qrcode.dart

@@ -0,0 +1,43 @@
+
+import 'package:gbk_codec/gbk_codec.dart';
+
+import 'enums.dart';
+
+class QRSize {
+  const QRSize._internal(this.value);
+  final List<int> value;
+
+  static const Zero4 = QRSize._internal([0x1d, 0x28, 0x6b, 0x03, 0x00, 0x31, 0x43, 0x04]);
+
+  static const Zero5 = QRSize._internal([0x1d, 0x28, 0x6b, 0x03, 0x00, 0x31, 0x43, 0x05]);
+
+  static const Zero6 = QRSize._internal([0x1d, 0x28, 0x6b, 0x03, 0x00, 0x31, 0x43, 0x06]);
+
+  static const Zero7 = QRSize._internal([0x1d, 0x28, 0x6b, 0x03, 0x00, 0x31, 0x43, 0x07]);
+
+  static const Zero8 = QRSize._internal([0x1d, 0x28, 0x6b, 0x03, 0x00, 0x31, 0x43, 0x08]);
+
+}
+
+
+class QRCode {
+  List<int> _data = <int>[];
+  List<int> get data => _data;
+  List<int> _gbkText;
+
+  QRCode(QRSize size, PosAlign align, String text){
+    _data += size.value;
+    _data += [0x1d, 0x28, 0x6b, 0x03, 0x00, 0x31, 0x45, 0x30];
+    _gbkText = gbk_bytes.encode(text);
+    // 设置数据长度
+    _data += [0x1d, 0x28, 0x6b, _gbkText.length + 3, 0x00, 0x31,0x50,0x30];
+    _data += _gbkText;
+
+    // 设置二维码位置
+    _data += [0x1b ,0x61 ,align.index];
+    _data += [0x1d, 0x28, 0x6b, 0x03, 0x00, 0x31, 0x52, 0x30];
+    _data += [0x1d, 0x28, 0x6b, 0x03, 0x00, 0x31, 0x51, 0x30];
+
+  }
+
+}

lib/src/ticket.dart

@@ -8,6 +8,7 @@
 
 import 'dart:convert';
 import 'dart:typed_data' show Uint8List;
+import 'package:esc_pos_utils/src/qrcode.dart';
 import 'package:gbk_codec/gbk_codec.dart';
 import 'package:hex/hex.dart';
 import 'package:image/image.dart';
@@ -156,6 +157,7 @@ class Ticket {
     bool isKanji = false,
     int colWidth = 12,
     int maxCharsPerLine,
+    bool inline
   }) {
     // Calculate maxCharsPerLine
     int charsPerLine;
@@ -194,9 +196,11 @@ class Ticket {
     final hexPair = HEX.decode(hexStr);
 
     // Position
-    bytes += Uint8List.fromList(
-      List.from(cPos.codeUnits)..addAll([hexPair[1], hexPair[0]]),
-    );
+    if(!inline){
+      bytes += Uint8List.fromList(
+        List.from(cPos.codeUnits)..addAll([hexPair[1], hexPair[0]]),
+      );
+    }
 
     setStyles(styles, isKanji: isKanji);
 
@@ -291,6 +295,7 @@ class Ticket {
         styles: styles,
         isKanji: isLexemeChinese[i],
         maxCharsPerLine: maxCharsPerLine,
+        inline: i>0
       );
     }
 
@@ -352,6 +357,7 @@ class Ticket {
             colInd: colInd,
             colWidth: cols[i].width,
             isKanji: isLexemeChinese[j],
+            inline: j>0
           );
         }
       }
@@ -628,6 +634,14 @@ class Ticket {
     }
   }
 
+  void qrcode(
+    QRCode code
+  ) {
+    // 固定头部，表明下面我要开始发功了
+    bytes += [0x1b, 0x40];
+    bytes += code.data;
+  }
+
   /// Print a barcode
   ///
   /// [width] range and units are different depending on the printer model (some printers use 1..5).

pubspec.lock

@@ -0,0 +1,216 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  archive:
+    dependency: transitive
+    description:
+      name: archive
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.0.11"
+  args:
+    dependency: transitive
+    description:
+      name: args
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.5.2"
+  async:
+    dependency: transitive
+    description:
+      name: async
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.4.0"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.0.5"
+  charcode:
+    dependency: transitive
+    description:
+      name: charcode
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.1.2"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.14.11"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.1.1"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.1.3"
+  csslib:
+    dependency: transitive
+    description:
+      name: csslib
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.16.1"
+  flutter:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_test:
+    dependency: "direct dev"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  gbk_codec:
+    dependency: "direct main"
+    description:
+      name: gbk_codec
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.3.2"
+  hex:
+    dependency: "direct main"
+    description:
+      name: hex
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.1.2"
+  html:
+    dependency: transitive
+    description:
+      name: html
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.14.0+3"
+  image:
+    dependency: "direct main"
+    description:
+      name: image
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.1.4"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.12.6"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.1.8"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.6.4"
+  pedantic:
+    dependency: transitive
+    description:
+      name: pedantic
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.8.0+1"
+  petitparser:
+    dependency: transitive
+    description:
+      name: petitparser
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.4.0"
+  quiver:
+    dependency: transitive
+    description:
+      name: quiver
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.0.5"
+  sky_engine:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.99"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.5.5"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.9.3"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.0.0"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.0.5"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.1.0"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.2.11"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.1.6"
+  vector_math:
+    dependency: transitive
+    description:
+      name: vector_math
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.0.8"
+  xml:
+    dependency: transitive
+    description:
+      name: xml
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.5.0"
+sdks:
+  dart: ">=2.4.0 <3.0.0"

pubspec.yaml

@@ -1,6 +1,6 @@
 name: esc_pos_utils
 description: Basic Flutter/Dart classes for ESC/POS printing. Ticket class generates ESC/POS commands that can be sent to a thermal printer.
-version: 0.3.5
+version: 0.3.7
 homepage: https://github.com/andrey-ushakov/esc_pos_utils
 
 environment: