1 | #Region "Microsoft.VisualBasic::d6278acd072863b4988b7c39be91bc1f, Microsoft.VisualBasic.Core\Text\Xml\XmlDeclaration.vb" |
2 | |
3 | ' Author: |
4 | ' |
5 | ' asuka (amethyst.asuka@gcmodeller.org) |
6 | ' xie (genetics@smrucc.org) |
7 | ' xieguigang (xie.guigang@live.com) |
8 | ' |
9 | ' Copyright (c) 2018 GPL3 Licensed |
10 | ' |
11 | ' |
12 | ' GNU GENERAL PUBLIC LICENSE (GPL3) |
13 | ' |
14 | ' |
15 | ' This program is free software: you can redistribute it and/or modify |
16 | ' it under the terms of the GNU General Public License as published by |
17 | ' the Free Software Foundation, either version 3 of the License, or |
18 | ' (at your option) any later version. |
19 | ' |
20 | ' This program is distributed in the hope that it will be useful, |
21 | ' but WITHOUT ANY WARRANTY; without even the implied warranty of |
22 | ' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
23 | ' GNU General Public License for more details. |
24 | ' |
25 | ' You should have received a copy of the GNU General Public License |
26 | ' along with this program. If not, see <http://www.gnu.org/licenses/>. |
27 | |
28 | |
29 | |
30 | ' /********************************************************************************/ |
31 | |
32 | ' Summaries: |
33 | |
34 | ' Enum XmlEncodings |
35 | ' |
36 | ' GB2312, UTF16, UTF8 |
37 | ' |
38 | ' |
39 | ' |
40 | ' |
41 | ' |
42 | ' Structure XmlDeclaration |
43 | ' |
44 | ' Properties: [Default] |
45 | ' |
46 | ' Constructor: (+1 Overloads) Sub New |
47 | ' Function: EncodingParser, ToString, XmlEncodingString, XmlStandaloneString |
48 | ' |
49 | ' |
50 | ' /********************************************************************************/ |
51 | |
52 | #End Region |
53 | |
54 | Imports System.Text.RegularExpressions |
55 | |
56 | Namespace Text.Xml |
57 | |
58 | Public Enum XmlEncodings |
59 | UTF8 |
60 | UTF16 |
61 | GB2312 |
62 | End Enum |
63 | |
64 | Public Structure XmlDeclaration |
65 | |
66 | Public version As String |
67 | Public standalone As Boolean |
68 | Public encoding As XmlEncodings |
69 | |
70 | Sub New(declares As String) |
71 | Dim s As String |
72 | |
73 | s = Regex.Match(declares, "encoding=""\S+""", RegexICSng).Value |
74 | encoding = EncodingParser(s.GetStackValue("""", """")) |
75 | s = Regex.Match(declares, "standalone=""\S+""", RegexICSng).Value |
76 | standalone = s.GetStackValue("""", """").ParseBoolean |
77 | s = Regex.Match(declares, "version=""\S+""", RegexICSng).Value |
78 | version = s.GetStackValue("""", """") |
79 | End Sub |
80 | |
81 | Public Shared ReadOnly Property [Default] As XmlDeclaration = |
82 | New XmlDeclaration With { |
83 | .version = "1.0", |
84 | .standalone = True, |
85 | .encoding = XmlEncodings.UTF16 |
86 | } |
87 | |
88 | ''' <summary> |
89 | ''' <?xml version="{<see cref="version"/>}" encoding="{<see cref="encoding"/>}" standalone="{<see cref="standalone"/>}"?> |
90 | ''' </summary> |
91 | ''' <returns></returns> |
92 | Public Overrides Function ToString() As String |
93 | If String.IsNullOrEmpty(version) Then |
94 | version = "1.0" |
95 | End If |
96 | Return $"<?xml version=""{version}"" encoding=""{XmlEncodingString(encoding)}"" standalone=""{XmlStandaloneString(standalone)}""?>" |
97 | End Function |
98 | |
99 | Public Shared Function XmlEncodingString(enc As XmlEncodings) As String |
100 | Return If(enc = XmlEncodings.UTF8, "utf-8", "utf-16") |
101 | End Function |
102 | |
103 | Public Shared Function EncodingParser(enc As String) As XmlEncodings |
104 | If String.Equals(enc, "utf-8", StringComparison.OrdinalIgnoreCase) Then |
105 | Return XmlEncodings.UTF8 |
106 | Else |
107 | Return XmlEncodings.UTF16 |
108 | End If |
109 | End Function |
110 | |
111 | Public Shared Function XmlStandaloneString(standalone As Boolean) As String |
112 | Return If(standalone, "yes", "no") |
113 | End Function |
114 | End Structure |
115 | End Namespace |