blob: 7a3de047bea9d050237ea93b0072856f5e7085ec (
plain)
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
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
|
// HtmlAgilityPack V1.0 - Simon Mourier <simon underscore mourier at hotmail dot com>
#region
using System;
using System.Diagnostics;
#endregion
namespace HtmlAgilityPack
{
/// <summary>
/// Represents an HTML attribute.
/// </summary>
[DebuggerDisplay("Name: {OriginalName}, Value: {Value}")]
public class HtmlAttribute : IComparable
{
#region Fields
private int _line;
internal int _lineposition;
internal string _name;
internal int _namelength;
internal int _namestartindex;
internal HtmlDocument _ownerdocument; // attribute can exists without a node
internal HtmlNode _ownernode;
private AttributeValueQuote _quoteType = AttributeValueQuote.DoubleQuote;
internal int _streamposition;
internal string _value;
internal int _valuelength;
internal int _valuestartindex;
#endregion
#region Constructors
internal HtmlAttribute(HtmlDocument ownerdocument)
{
_ownerdocument = ownerdocument;
}
#endregion
#region Properties
/// <summary>
/// Gets the line number of this attribute in the document.
/// </summary>
public int Line
{
get { return _line; }
internal set { _line = value; }
}
/// <summary>
/// Gets the column number of this attribute in the document.
/// </summary>
public int LinePosition
{
get { return _lineposition; }
}
/// <summary>
/// Gets the qualified name of the attribute.
/// </summary>
public string Name
{
get
{
if (_name == null)
{
_name = _ownerdocument._text.Substring(_namestartindex, _namelength);
}
return _name.ToLower();
}
set
{
if (value == null)
{
throw new ArgumentNullException("value");
}
_name = value;
if (_ownernode != null)
{
_ownernode._innerchanged = true;
_ownernode._outerchanged = true;
}
}
}
/// <summary>
/// Name of attribute with original case
/// </summary>
public string OriginalName
{
get { return _name; }
}
/// <summary>
/// Gets the HTML document to which this attribute belongs.
/// </summary>
public HtmlDocument OwnerDocument
{
get { return _ownerdocument; }
}
/// <summary>
/// Gets the HTML node to which this attribute belongs.
/// </summary>
public HtmlNode OwnerNode
{
get { return _ownernode; }
}
/// <summary>
/// Specifies what type of quote the data should be wrapped in
/// </summary>
public AttributeValueQuote QuoteType
{
get { return _quoteType; }
set { _quoteType = value; }
}
/// <summary>
/// Gets the stream position of this attribute in the document, relative to the start of the document.
/// </summary>
public int StreamPosition
{
get { return _streamposition; }
}
/// <summary>
/// Gets or sets the value of the attribute.
/// </summary>
public string Value
{
get
{
if (_value == null)
{
_value = _ownerdocument._text.Substring(_valuestartindex, _valuelength);
}
return _value;
}
set
{
_value = value;
if (_ownernode != null)
{
_ownernode._innerchanged = true;
_ownernode._outerchanged = true;
}
}
}
internal string XmlName
{
get { return HtmlDocument.GetXmlName(Name); }
}
internal string XmlValue
{
get { return Value; }
}
/// <summary>
/// Gets a valid XPath string that points to this Attribute
/// </summary>
public string XPath
{
get
{
string basePath = (OwnerNode == null) ? "/" : OwnerNode.XPath + "/";
return basePath + GetRelativeXpath();
}
}
#endregion
#region IComparable Members
/// <summary>
/// Compares the current instance with another attribute. Comparison is based on attributes' name.
/// </summary>
/// <param name="obj">An attribute to compare with this instance.</param>
/// <returns>A 32-bit signed integer that indicates the relative order of the names comparison.</returns>
public int CompareTo(object obj)
{
HtmlAttribute att = obj as HtmlAttribute;
if (att == null)
{
throw new ArgumentException("obj");
}
return Name.CompareTo(att.Name);
}
#endregion
#region Public Methods
/// <summary>
/// Creates a duplicate of this attribute.
/// </summary>
/// <returns>The cloned attribute.</returns>
public HtmlAttribute Clone()
{
HtmlAttribute att = new HtmlAttribute(_ownerdocument);
att.Name = Name;
att.Value = Value;
return att;
}
/// <summary>
/// Removes this attribute from it's parents collection
/// </summary>
public void Remove()
{
_ownernode.Attributes.Remove(this);
}
#endregion
#region Private Methods
private string GetRelativeXpath()
{
if (OwnerNode == null)
return Name;
int i = 1;
foreach (HtmlAttribute node in OwnerNode.Attributes)
{
if (node.Name != Name) continue;
if (node == this)
break;
i++;
}
return "@" + Name + "[" + i + "]";
}
#endregion
}
/// <summary>
/// An Enum representing different types of Quotes used for surrounding attribute values
/// </summary>
public enum AttributeValueQuote
{
/// <summary>
/// A single quote mark '
/// </summary>
SingleQuote,
/// <summary>
/// A double quote mark "
/// </summary>
DoubleQuote
}
}
|