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
|
//------------------------------------------------------------------------------
// <copyright file="ChtmlTextWriter.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
// ChtmlTextWriter.cs
//
namespace System.Web.UI {
using System;
using System.Collections;
using System.Collections.Specialized;
using System.IO;
using System.Text;
using System.Web.UI.WebControls;
using System.Web.Util;
using System.Globalization;
using System.Security.Permissions;
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public class ChtmlTextWriter : Html32TextWriter {
private Hashtable _recognizedAttributes = new Hashtable(StringComparer.CurrentCultureIgnoreCase);
private Hashtable _suppressedAttributes = new Hashtable(StringComparer.CurrentCultureIgnoreCase);
private Hashtable _globalSuppressedAttributes = new Hashtable(StringComparer.CurrentCultureIgnoreCase);
public ChtmlTextWriter(TextWriter writer) : this(writer, DefaultTabString) {
}
public ChtmlTextWriter(TextWriter writer, string tabString) : base(writer, tabString) {
_globalSuppressedAttributes["onclick"] = true;
_globalSuppressedAttributes["ondblclick"] = true;
_globalSuppressedAttributes["onmousedown"] = true;
_globalSuppressedAttributes["onmouseup"] = true;
_globalSuppressedAttributes["onmouseover"] = true;
_globalSuppressedAttributes["onmousemove"] = true;
_globalSuppressedAttributes["onmouseout"] = true;
_globalSuppressedAttributes["onkeypress"] = true;
_globalSuppressedAttributes["onkeydown"] = true;
_globalSuppressedAttributes["onkeyup"] = true;
// Supress certain element attribute pairs that can happen when Html32TextWriter performs the div table
// substitution.
RemoveRecognizedAttributeInternal("div", "accesskey"); // VSWhidbey 270254
RemoveRecognizedAttributeInternal("div", "cellspacing");
RemoveRecognizedAttributeInternal("div", "cellpadding");
RemoveRecognizedAttributeInternal("div", "gridlines");
RemoveRecognizedAttributeInternal("div", "rules");
RemoveRecognizedAttributeInternal("span", "cellspacing");
RemoveRecognizedAttributeInternal("span", "cellpadding");
RemoveRecognizedAttributeInternal("span", "gridlines");
RemoveRecognizedAttributeInternal("span", "rules");
}
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public virtual void AddRecognizedAttribute(string elementName, string attributeName) {
Hashtable eltAttributes = (Hashtable) _recognizedAttributes[elementName];
if (eltAttributes == null) {
eltAttributes = new Hashtable(StringComparer.CurrentCultureIgnoreCase);
_recognizedAttributes[elementName] = eltAttributes;
}
eltAttributes.Add(attributeName, true);
}
/// <devdoc>
/// Override to filter out unnecessary attributes
/// </devdoc>
protected override bool OnAttributeRender(string name, string value, HtmlTextWriterAttribute key) {
Hashtable elementRecognizedAttributes = (Hashtable)_recognizedAttributes[TagName];
if (elementRecognizedAttributes != null && elementRecognizedAttributes[name] != null) {
return true;
}
if (_globalSuppressedAttributes[name] != null) {
return false;
}
Hashtable elementSuppressedAttributes = (Hashtable)_suppressedAttributes[TagName];
if (elementSuppressedAttributes != null && elementSuppressedAttributes[name] != null) {
return false;
}
return true;
}
protected override bool OnStyleAttributeRender(string name,string value, HtmlTextWriterStyle key) {
if (key == HtmlTextWriterStyle.TextDecoration) {
if (StringUtil.EqualsIgnoreCase("line-through", value)) {
return false;
}
}
return base.OnStyleAttributeRender(name, value, key);
}
protected override bool OnTagRender(string name, HtmlTextWriterTag key) {
return base.OnTagRender(name, key) && key != HtmlTextWriterTag.Span;
}
/// <devdoc>
/// <para>[To be supplied.]</para>
/// </devdoc>
public virtual void RemoveRecognizedAttribute(string elementName, string attributeName) {
RemoveRecognizedAttributeInternal(elementName, attributeName);
}
private void RemoveRecognizedAttributeInternal(string elementName, string attributeName) {
// Since recognized attributes have precedence, we need to do two operations: add this attribute
// to the suppressed list, and remove it from the recognized list.
Hashtable eltAttributes = (Hashtable) _suppressedAttributes[elementName];
if (eltAttributes == null) {
eltAttributes = new Hashtable(StringComparer.CurrentCultureIgnoreCase);
_suppressedAttributes[elementName] = eltAttributes;
}
eltAttributes.Add(attributeName, true);
eltAttributes = (Hashtable)_recognizedAttributes[elementName];
if (eltAttributes == null) {
eltAttributes = new Hashtable(StringComparer.CurrentCultureIgnoreCase);
_recognizedAttributes[elementName] = eltAttributes;
}
// Note: Hashtable::Remove silently continues if the key does not exist.
eltAttributes.Remove(attributeName);
}
public override void WriteBreak() {
Write("<br>");
}
public override void WriteEncodedText(String text) {
if (null == text || text.Length == 0) {
return;
}
int length = text.Length;
int start = -1;
for(int pos = 0; pos < length; pos++) {
int ch = text[pos];
if(ch > 160 && ch < 256) {
if(start != -1) {
base.WriteEncodedText(text.Substring(start, pos - start));
start = -1;
}
base.Write(text[pos]);
}
else {
if(start == -1) {
start = pos;
}
}
}
if(start != -1) {
if(start == 0) {
base.WriteEncodedText(text);
}
else {
base.WriteEncodedText(text.Substring(start, length - start));
}
}
}
protected Hashtable RecognizedAttributes {
get {
return _recognizedAttributes;
}
}
protected Hashtable SuppressedAttributes {
get {
return _suppressedAttributes;
}
}
protected Hashtable GlobalSuppressedAttributes {
get {
return _globalSuppressedAttributes;
}
}
}
}
|
