printing_web.dart
3.54 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
/*
* Copyright (C) 2017, David PHAM-VAN <dev.nfet.net@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
library printing_web;
import 'dart:async';
import 'dart:html' as html;
import 'dart:js' as js;
import 'package:flutter/services.dart';
import 'package:flutter_web_plugins/flutter_web_plugins.dart';
part 'wsrc/print_job.dart';
class PrintingPlugin {
PrintingPlugin(this._channel);
static void registerWith(Registrar registrar) {
final MethodChannel channel = MethodChannel(
'net.nfet.printing',
const StandardMethodCodec(),
registrar.messenger,
);
final PrintingPlugin instance = PrintingPlugin(channel);
channel.setMethodCallHandler(instance.handleMethodCall);
}
final MethodChannel _channel;
Future<dynamic> handleMethodCall(MethodCall call) async {
switch (call.method) {
case 'printPdf':
final String name = call.arguments['name'];
final double width = call.arguments['width'];
final double height = call.arguments['height'];
final double marginLeft = call.arguments['marginLeft'];
final double marginTop = call.arguments['marginTop'];
final double marginRight = call.arguments['marginRight'];
final double marginBottom = call.arguments['marginBottom'];
final _PrintJob printJob = _PrintJob(this, call.arguments['job']);
return printJob.printPdf(name, width, height, marginLeft, marginTop,
marginRight, marginBottom);
case 'sharePdf':
final List<int> data = call.arguments['doc'];
final double x = call.arguments['x'];
final double y = call.arguments['y'];
final double width = call.arguments['w'];
final double height = call.arguments['h'];
final String name = call.arguments['name'];
return _PrintJob.sharePdf(data, x, y, width, height, name);
case 'printingInfo':
return _PrintJob.printingInfo();
}
throw UnimplementedError('Method "${call.method}" not implemented');
}
/// Request the Pdf document from flutter
Future<void> onLayout(
_PrintJob printJob,
double width,
double height,
double marginLeft,
double marginTop,
double marginRight,
double marginBottom) async {
final Map<String, dynamic> args = <String, dynamic>{
'width': width,
'height': height,
'marginLeft': marginLeft,
'marginTop': marginTop,
'marginRight': marginRight,
'marginBottom': marginBottom,
'job': printJob.index,
};
final dynamic result =
await _channel.invokeMethod<dynamic>('onLayout', args);
if (result is List<int>) {
printJob.setDocument(result);
} else {
printJob.cancelJob();
}
}
/// send completion status to flutter
Future<void> onCompleted(_PrintJob printJob, bool completed,
[String error = '']) async {
final Map<String, dynamic> data = <String, dynamic>{
'completed': completed,
'error': error,
'job': printJob.index,
};
await _channel.invokeMethod<dynamic>('onCompleted', data);
}
}