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
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
|
//------------------------------------------------------------------------------
// <copyright file="DocumentXmlWriter.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">[....]</owner>
//------------------------------------------------------------------------------
using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Xml.Schema;
namespace System.Xml {
enum DocumentXmlWriterType {
InsertSiblingAfter,
InsertSiblingBefore,
PrependChild,
AppendChild,
AppendAttribute,
ReplaceToFollowingSibling,
}
// Implements a XmlWriter that augments a XmlDocument.
sealed class DocumentXmlWriter : XmlRawWriter, IXmlNamespaceResolver {
enum State {
Error,
Attribute,
Prolog,
Fragment,
Content,
Last, // always last
}
enum Method {
WriteXmlDeclaration,
WriteStartDocument,
WriteEndDocument,
WriteDocType,
WriteStartElement,
WriteEndElement,
WriteFullEndElement,
WriteStartAttribute,
WriteEndAttribute,
WriteStartNamespaceDeclaration,
WriteEndNamespaceDeclaration,
WriteCData,
WriteComment,
WriteProcessingInstruction,
WriteEntityRef,
WriteWhitespace,
WriteString,
}
DocumentXmlWriterType type; // writer type
XmlNode start; // context node
XmlDocument document; // context document
XmlNamespaceManager namespaceManager; // context namespace manager
State state; // current state
XmlNode write; // current node
List<XmlNode> fragment; // top level node cache
XmlWriterSettings settings; // wrapping writer settings
DocumentXPathNavigator navigator; // context for replace
XmlNode end; // context for replace
public DocumentXmlWriter(DocumentXmlWriterType type, XmlNode start, XmlDocument document) {
this.type = type;
this.start = start;
this.document = document;
state = StartState();
fragment = new List<XmlNode>();
settings = new XmlWriterSettings();
settings.ReadOnly = false;
settings.CheckCharacters = false;
settings.CloseOutput = false;
settings.ConformanceLevel = (state == State.Prolog ? ConformanceLevel.Document : ConformanceLevel.Fragment);
settings.ReadOnly = true;
}
public XmlNamespaceManager NamespaceManager {
set {
namespaceManager = value;
}
}
public override XmlWriterSettings Settings {
get {
return settings;
}
}
internal void SetSettings(XmlWriterSettings value) {
settings = value;
}
public DocumentXPathNavigator Navigator {
set {
navigator = value;
}
}
public XmlNode EndNode {
set {
end = value;
}
}
internal override void WriteXmlDeclaration(XmlStandalone standalone) {
VerifyState(Method.WriteXmlDeclaration);
if (standalone != XmlStandalone.Omit) {
XmlNode node = document.CreateXmlDeclaration("1.0", string.Empty, standalone == XmlStandalone.Yes ? "yes" : "no");
AddChild(node, write);
}
}
internal override void WriteXmlDeclaration(string xmldecl) {
VerifyState(Method.WriteXmlDeclaration);
string version, encoding, standalone;
XmlLoader.ParseXmlDeclarationValue(xmldecl, out version, out encoding, out standalone);
XmlNode node = document.CreateXmlDeclaration(version, encoding, standalone);
AddChild(node, write);
}
public override void WriteStartDocument() {
VerifyState(Method.WriteStartDocument);
}
public override void WriteStartDocument(bool standalone) {
VerifyState(Method.WriteStartDocument);
}
public override void WriteEndDocument() {
VerifyState(Method.WriteEndDocument);
}
public override void WriteDocType(string name, string pubid, string sysid, string subset) {
VerifyState(Method.WriteDocType);
XmlNode node = document.CreateDocumentType(name, pubid, sysid, subset);
AddChild(node, write);
}
public override void WriteStartElement(string prefix, string localName, string ns) {
VerifyState(Method.WriteStartElement);
XmlNode node = document.CreateElement(prefix, localName, ns);
AddChild(node, write);
write = node;
}
public override void WriteEndElement() {
VerifyState(Method.WriteEndElement);
if (write == null) {
throw new InvalidOperationException();
}
write = write.ParentNode;
}
internal override void WriteEndElement(string prefix, string localName, string ns) {
WriteEndElement();
}
public override void WriteFullEndElement() {
VerifyState(Method.WriteFullEndElement);
XmlElement elem = write as XmlElement;
if (elem == null) {
throw new InvalidOperationException();
}
elem.IsEmpty = false;
write = elem.ParentNode;
}
internal override void WriteFullEndElement(string prefix, string localName, string ns) {
WriteFullEndElement();
}
internal override void StartElementContent() {
// nop
}
public override void WriteStartAttribute(string prefix, string localName, string ns) {
VerifyState(Method.WriteStartAttribute);
XmlAttribute attr = document.CreateAttribute(prefix, localName, ns);
AddAttribute(attr, write);
write = attr;
}
public override void WriteEndAttribute() {
VerifyState(Method.WriteEndAttribute);
XmlAttribute attr = write as XmlAttribute;
if (attr == null) {
throw new InvalidOperationException();
}
if (!attr.HasChildNodes) {
XmlNode node = document.CreateTextNode(string.Empty);
AddChild(node, attr);
}
write = attr.OwnerElement;
}
internal override void WriteNamespaceDeclaration(string prefix, string ns) {
this.WriteStartNamespaceDeclaration(prefix);
this.WriteString(ns);
this.WriteEndNamespaceDeclaration();
}
internal override bool SupportsNamespaceDeclarationInChunks {
get {
return true;
}
}
internal override void WriteStartNamespaceDeclaration(string prefix) {
VerifyState(Method.WriteStartNamespaceDeclaration);
XmlAttribute attr;
if (prefix.Length == 0) {
attr = document.CreateAttribute(prefix, document.strXmlns, document.strReservedXmlns);
}
else {
attr = document.CreateAttribute(document.strXmlns, prefix, document.strReservedXmlns);
}
AddAttribute(attr, write);
write = attr;
}
internal override void WriteEndNamespaceDeclaration() {
VerifyState(Method.WriteEndNamespaceDeclaration);
XmlAttribute attr = write as XmlAttribute;
if (attr == null) {
throw new InvalidOperationException();
}
if (!attr.HasChildNodes) {
XmlNode node = document.CreateTextNode(string.Empty);
AddChild(node, attr);
}
write = attr.OwnerElement;
}
public override void WriteCData(string text) {
VerifyState(Method.WriteCData);
XmlConvert.VerifyCharData(text, ExceptionType.ArgumentException);
XmlNode node = document.CreateCDataSection(text);
AddChild(node, write);
}
public override void WriteComment(string text) {
VerifyState(Method.WriteComment);
XmlConvert.VerifyCharData(text, ExceptionType.ArgumentException);
XmlNode node = document.CreateComment(text);
AddChild(node, write);
}
public override void WriteProcessingInstruction(string name, string text) {
VerifyState(Method.WriteProcessingInstruction);
XmlConvert.VerifyCharData(text, ExceptionType.ArgumentException);
XmlNode node = document.CreateProcessingInstruction(name, text);
AddChild(node, write);
}
public override void WriteEntityRef(string name) {
VerifyState(Method.WriteEntityRef);
XmlNode node = document.CreateEntityReference(name);
AddChild(node, write);
//
}
public override void WriteCharEntity(char ch) {
WriteString(new string(ch, 1));
}
public override void WriteWhitespace(string text) {
VerifyState(Method.WriteWhitespace);
XmlConvert.VerifyCharData(text, ExceptionType.ArgumentException);
if (document.PreserveWhitespace) {
XmlNode node = document.CreateWhitespace(text);
AddChild(node, write);
}
}
public override void WriteString(string text) {
VerifyState(Method.WriteString);
XmlConvert.VerifyCharData(text, ExceptionType.ArgumentException);
XmlNode node = document.CreateTextNode(text);
AddChild(node, write);
}
public override void WriteSurrogateCharEntity(char lowCh, char highCh) {
WriteString(new string(new char[] {highCh, lowCh}));
}
public override void WriteChars(char[] buffer, int index, int count) {
WriteString(new string(buffer, index, count));
}
public override void WriteRaw(char[] buffer, int index, int count) {
WriteString(new string(buffer, index, count));
}
public override void WriteRaw(string data) {
WriteString(data);
}
public override void Close() {
// nop
}
internal override void Close(WriteState currentState) {
if (currentState == WriteState.Error) {
return;
}
try {
switch (type) {
case DocumentXmlWriterType.InsertSiblingAfter:
XmlNode parent = start.ParentNode;
if (parent == null) {
throw new InvalidOperationException(Res.GetString(Res.Xpn_MissingParent));
}
for (int i = fragment.Count - 1; i >= 0; i--) {
parent.InsertAfter(fragment[i], start);
}
break;
case DocumentXmlWriterType.InsertSiblingBefore:
parent = start.ParentNode;
if (parent == null) {
throw new InvalidOperationException(Res.GetString(Res.Xpn_MissingParent));
}
for (int i = 0; i < fragment.Count; i++) {
parent.InsertBefore(fragment[i], start);
}
break;
case DocumentXmlWriterType.PrependChild:
for (int i = fragment.Count - 1; i >= 0; i--) {
start.PrependChild(fragment[i]);
}
break;
case DocumentXmlWriterType.AppendChild:
for (int i = 0; i < fragment.Count; i++) {
start.AppendChild(fragment[i]);
}
break;
case DocumentXmlWriterType.AppendAttribute:
CloseWithAppendAttribute();
break;
case DocumentXmlWriterType.ReplaceToFollowingSibling:
if (fragment.Count == 0) {
throw new InvalidOperationException(Res.GetString(Res.Xpn_NoContent));
}
CloseWithReplaceToFollowingSibling();
break;
}
}
finally {
fragment.Clear();
}
}
private void CloseWithAppendAttribute() {
XmlElement elem = start as XmlElement;
Debug.Assert(elem != null);
XmlAttributeCollection attrs = elem.Attributes;
for (int i = 0; i < fragment.Count; i++) {
XmlAttribute attr = fragment[i] as XmlAttribute;
Debug.Assert(attr != null);
int offset = attrs.FindNodeOffsetNS(attr);
if (offset != -1
&& ((XmlAttribute)attrs.nodes[offset]).Specified) {
throw new XmlException(Res.Xml_DupAttributeName, attr.Prefix.Length == 0 ? attr.LocalName : string.Concat(attr.Prefix, ":", attr.LocalName));
}
}
for (int i = 0; i < fragment.Count; i++) {
XmlAttribute attr = fragment[i] as XmlAttribute;
Debug.Assert(attr != null);
attrs.Append(attr);
}
}
private void CloseWithReplaceToFollowingSibling() {
XmlNode parent = start.ParentNode;
if (parent == null) {
throw new InvalidOperationException(Res.GetString(Res.Xpn_MissingParent));
}
if (start != end) {
if (!DocumentXPathNavigator.IsFollowingSibling(start, end)) {
throw new InvalidOperationException(Res.GetString(Res.Xpn_BadPosition));
}
if (start.IsReadOnly) {
throw new InvalidOperationException(Res.GetString(Res.Xdom_Node_Modify_ReadOnly));
}
DocumentXPathNavigator.DeleteToFollowingSibling(start.NextSibling, end);
}
XmlNode fragment0 = fragment[0];
parent.ReplaceChild(fragment0, start);
for (int i = fragment.Count - 1; i >= 1; i--) {
parent.InsertAfter(fragment[i], fragment0);
}
navigator.ResetPosition(fragment0);
}
public override void Flush() {
// nop
}
IDictionary<string,string> IXmlNamespaceResolver.GetNamespacesInScope(XmlNamespaceScope scope) {
return namespaceManager.GetNamespacesInScope(scope);
}
string IXmlNamespaceResolver.LookupNamespace(string prefix) {
return namespaceManager.LookupNamespace(prefix);
}
string IXmlNamespaceResolver.LookupPrefix(string namespaceName) {
return namespaceManager.LookupPrefix(namespaceName);
}
void AddAttribute(XmlAttribute attr, XmlNode parent) {
if (parent == null) {
fragment.Add(attr);
}
else {
XmlElement elem = parent as XmlElement;
if (elem == null) {
throw new InvalidOperationException();
}
elem.Attributes.Append(attr);
}
}
void AddChild(XmlNode node, XmlNode parent) {
if (parent == null) {
fragment.Add(node);
}
else {
parent.AppendChild(node);
}
}
State StartState() {
XmlNodeType nodeType = XmlNodeType.None;
switch (type) {
case DocumentXmlWriterType.InsertSiblingAfter:
case DocumentXmlWriterType.InsertSiblingBefore:
XmlNode parent = start.ParentNode;
if (parent != null) {
nodeType = parent.NodeType;
}
if (nodeType == XmlNodeType.Document) {
return State.Prolog;
}
else if (nodeType == XmlNodeType.DocumentFragment) {
return State.Fragment;
}
break;
case DocumentXmlWriterType.PrependChild:
case DocumentXmlWriterType.AppendChild:
nodeType = start.NodeType;
if (nodeType == XmlNodeType.Document) {
return State.Prolog;
}
else if (nodeType == XmlNodeType.DocumentFragment) {
return State.Fragment;
}
break;
case DocumentXmlWriterType.AppendAttribute:
return State.Attribute;
case DocumentXmlWriterType.ReplaceToFollowingSibling:
break;
}
return State.Content;
}
static State[] changeState = {
// State.Error, State.Attribute,State.Prolog, State.Fragment, State.Content,
// Method.XmlDeclaration:
State.Error, State.Error, State.Prolog, State.Content, State.Error,
// Method.StartDocument:
State.Error, State.Error, State.Error, State.Error, State.Error,
// Method.EndDocument:
State.Error, State.Error, State.Error, State.Error, State.Error,
// Method.DocType:
State.Error, State.Error, State.Prolog, State.Error, State.Error,
// Method.StartElement:
State.Error, State.Error, State.Content, State.Content, State.Content,
// Method.EndElement:
State.Error, State.Error, State.Error, State.Error, State.Content,
// Method.FullEndElement:
State.Error, State.Error, State.Error, State.Error, State.Content,
// Method.StartAttribute:
State.Error, State.Content, State.Error, State.Error, State.Content,
// Method.EndAttribute:
State.Error, State.Error, State.Error, State.Error, State.Content,
// Method.StartNamespaceDeclaration:
State.Error, State.Content, State.Error, State.Error, State.Content,
// Method.EndNamespaceDeclaration:
State.Error, State.Error, State.Error, State.Error, State.Content,
// Method.CData:
State.Error, State.Error, State.Error, State.Content, State.Content,
// Method.Comment:
State.Error, State.Error, State.Prolog, State.Content, State.Content,
// Method.ProcessingInstruction:
State.Error, State.Error, State.Prolog, State.Content, State.Content,
// Method.EntityRef:
State.Error, State.Error, State.Error, State.Content, State.Content,
// Method.Whitespace:
State.Error, State.Error, State.Prolog, State.Content, State.Content,
// Method.String:
State.Error, State.Error, State.Error, State.Content, State.Content,
};
void VerifyState(Method method) {
state = changeState[(int)method * (int)State.Last + (int)state];
if (state == State.Error) {
throw new InvalidOperationException(Res.GetString(Res.Xml_ClosedOrError));
}
}
}
}
|