source: trunk/src/xmlpatterns/acceltree/qacceltreebuilder.cpp@ 1032

Last change on this file since 1032 was 846, checked in by Dmitry A. Kuminov, 15 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.
File size: 16.0 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation (qt-info@nokia.com)
6**
7** This file is part of the QtXmlPatterns module of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
15**
16** GNU Lesser General Public License Usage
17** Alternatively, this file may be used under the terms of the GNU Lesser
18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
24** In addition, as a special exception, Nokia gives you certain additional
25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you have questions regarding the use of this file, please contact
37** Nokia at qt-info@nokia.com.
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42/**
43 * @file
44 * @short This file is included by qacceltreebuilder_p.h.
45 * If you need includes in this file, put them in qacceltreebuilder_p.h, outside of the namespace.
46 */
47
48template <bool FromDocument>
49AccelTreeBuilder<FromDocument>::AccelTreeBuilder(const QUrl &docURI,
50 const QUrl &baseURI,
51 const NamePool::Ptr &np,
52 ReportContext *const context,
53 Features features) : m_preNumber(-1)
54 , m_isPreviousAtomic(false)
55 , m_hasCharacters(false)
56 , m_isCharactersCompressed(false)
57 , m_namePool(np)
58 , m_document(new AccelTree(docURI, baseURI))
59 , m_skippedDocumentNodes(0)
60 , m_documentURI(docURI)
61 , m_context(context)
62 , m_features(features)
63{
64 Q_ASSERT(m_namePool);
65
66 /* TODO Perhaps we can merge m_ancestors and m_size
67 * into one, and store a struct for the two instead? */
68 m_ancestors.reserve(DefaultNodeStackSize);
69 m_ancestors.push(-1);
70
71 m_size.reserve(DefaultNodeStackSize);
72 m_size.push(0);
73}
74
75template <bool FromDocument>
76void AccelTreeBuilder<FromDocument>::startStructure()
77{
78 if(m_hasCharacters)
79 {
80 /* We create a node even if m_characters is empty.
81 * Remember that `text {""}' creates one text node
82 * with string value "". */
83
84 ++m_preNumber;
85 m_document->basicData.append(AccelTree::BasicNodeData(currentDepth(),
86 currentParent(),
87 QXmlNodeModelIndex::Text,
88 m_isCharactersCompressed ? AccelTree::IsCompressed : 0));
89 m_document->data.insert(m_preNumber, m_characters);
90 ++m_size.top();
91
92 m_characters.clear(); /* We don't want it added twice. */
93 m_hasCharacters = false;
94
95 if(m_isCharactersCompressed)
96 m_isCharactersCompressed = false;
97 }
98}
99
100template <bool FromDocument>
101void AccelTreeBuilder<FromDocument>::item(const Item &it)
102{
103 Q_ASSERT(it);
104
105 if(it.isAtomicValue())
106 {
107 if(m_isPreviousAtomic)
108 {
109 m_characters += QLatin1Char(' ');
110 m_characters += it.stringValue();
111 }
112 else
113 {
114 m_isPreviousAtomic = true;
115 const QString sv(it.stringValue());
116
117 if(!sv.isEmpty())
118 {
119 m_characters += sv;
120 m_hasCharacters = true;
121 }
122 }
123 }
124 else
125 sendAsNode(it);
126}
127
128template <bool FromDocument>
129void AccelTreeBuilder<FromDocument>::startElement(const QXmlName &name)
130{
131 startElement(name, 1, 1);
132}
133
134template <bool FromDocument>
135void AccelTreeBuilder<FromDocument>::startElement(const QXmlName &name, qint64 line, qint64 column)
136{
137 startStructure();
138
139 AccelTree::BasicNodeData data(currentDepth(), currentParent(), QXmlNodeModelIndex::Element, -1, name);
140 m_document->basicData.append(data);
141 if (m_features & SourceLocationsFeature)
142 m_document->sourcePositions.insert(m_document->maximumPreNumber(), qMakePair(line, column));
143
144 ++m_preNumber;
145 m_ancestors.push(m_preNumber);
146
147 ++m_size.top();
148 m_size.push(0);
149
150 /* With node constructors, we can receive names for which we have no namespace
151 * constructors, such as in the query '<xs:space/>'. Since the 'xs' prefix has no
152 * NamespaceConstructor in this case, we synthesize the namespace.
153 *
154 * In case we're constructing from an XML document we avoid the call because
155 * although it's redundant, it's on extra virtual call for each element. */
156 if(!FromDocument)
157 namespaceBinding(QXmlName(name.namespaceURI(), 0, name.prefix()));
158
159 m_isPreviousAtomic = false;
160}
161
162template <bool FromDocument>
163void AccelTreeBuilder<FromDocument>::endElement()
164{
165 startStructure();
166 const AccelTree::PreNumber index = m_ancestors.pop();
167 AccelTree::BasicNodeData &data = m_document->basicData[index];
168
169 /* Sub trees needs to be included in upper trees, so we add the count of this element
170 * to our parent. */
171 m_size[m_size.count() - 2] += m_size.top();
172
173 data.setSize(m_size.pop());
174 m_isPreviousAtomic = false;
175}
176
177template <bool FromDocument>
178void AccelTreeBuilder<FromDocument>::attribute(const QXmlName &name, const QStringRef &value)
179{
180 /* Attributes adds a namespace binding, so lets synthesize one.
181 *
182 * We optimize by checking whether we have a namespace for which a binding would
183 * be generated. Happens relatively rarely. */
184 if(name.hasPrefix())
185 namespaceBinding(QXmlName(name.namespaceURI(), 0, name.prefix()));
186
187 m_document->basicData.append(AccelTree::BasicNodeData(currentDepth(), currentParent(), QXmlNodeModelIndex::Attribute, 0, name));
188 ++m_preNumber;
189 ++m_size.top();
190
191 m_isPreviousAtomic = false;
192
193 if(name.namespaceURI() == StandardNamespaces::xml && name.localName() == StandardLocalNames::id)
194 {
195 const QString normalized(value.toString().simplified());
196
197 if(QXmlUtils::isNCName(normalized))
198 {
199 const QXmlName::LocalNameCode id = m_namePool->allocateLocalName(normalized);
200
201 const int oldSize = m_document->m_IDs.count();
202 m_document->m_IDs.insert(id, currentParent());
203 /* We don't run the value through m_attributeCompress here, because
204 * the likelyhood of it deing identical to another attribute is
205 * very small. */
206 m_document->data.insert(m_preNumber, normalized);
207
208 /**
209 * In the case that we're called for doc-available(), m_context is
210 * null, and we need to flag somehow that we failed to load this
211 * document.
212 */
213 if(oldSize == m_document->m_IDs.count() && m_context) // TODO
214 {
215 Q_ASSERT(m_context);
216 m_context->error(QtXmlPatterns::tr("An %1-attribute with value %2 has already been declared.")
217 .arg(formatKeyword("xml:id"),
218 formatData(normalized)),
219 FromDocument ? ReportContext::FODC0002 : ReportContext::XQDY0091,
220 this);
221 }
222 }
223 else if(m_context) // TODO
224 {
225 Q_ASSERT(m_context);
226
227 /* If we're building from an XML Document(e.g, we're fed from QXmlStreamReader, we raise FODC0002,
228 * otherwise XQDY0091. */
229 m_context->error(QtXmlPatterns::tr("An %1-attribute must have a "
230 "valid %2 as value, which %3 isn't.").arg(formatKeyword("xml:id"),
231 formatType(m_namePool, BuiltinTypes::xsNCName),
232 formatData(value.toString())),
233 FromDocument ? ReportContext::FODC0002 : ReportContext::XQDY0091,
234 this);
235 }
236 }
237 else
238 m_document->data.insert(m_preNumber, *m_attributeCompress.insert(value.toString()));
239}
240
241template <bool FromDocument>
242void AccelTreeBuilder<FromDocument>::characters(const QStringRef &ch)
243{
244
245 /* If a text node constructor appears by itself, a node needs to
246 * be created. Therefore, we set m_hasCharacters
247 * if we're the only node.
248 * However, if the text node appears as a child of a document or element
249 * node it is discarded if it's empty.
250 */
251 if(m_hasCharacters && m_isCharactersCompressed)
252 {
253 m_characters = CompressedWhitespace::decompress(m_characters);
254 m_isCharactersCompressed = false;
255 }
256
257 m_characters += ch;
258
259 m_isPreviousAtomic = false;
260 m_hasCharacters = !m_characters.isEmpty() || m_preNumber == -1; /* -1 is our start value. */
261}
262
263template <bool FromDocument>
264void AccelTreeBuilder<FromDocument>::whitespaceOnly(const QStringRef &ch)
265{
266 Q_ASSERT(!ch.isEmpty());
267 Q_ASSERT(ch.toString().trimmed().isEmpty());
268
269 /* This gets problematic due to how QXmlStreamReader works(which
270 * is the only one we get whitespaceOnly() events from). Namely, text intermingled
271 * with CDATA gets reported as individual Characters events, and
272 * QXmlStreamReader::isWhitespace() can return differently for each of those. However,
273 * it will occur very rarely, so this workaround of 1) mistakenly compressing 2) decompressing 3)
274 * appending, will happen infrequently.
275 */
276 if(m_hasCharacters)
277 {
278 if(m_isCharactersCompressed)
279 {
280 m_characters = CompressedWhitespace::decompress(m_characters);
281 m_isCharactersCompressed = false;
282 }
283
284 m_characters.append(ch.toString());
285 }
286 else
287 {
288 /* We haven't received a text node previously. */
289 m_characters = CompressedWhitespace::compress(ch);
290 m_isCharactersCompressed = true;
291 m_isPreviousAtomic = false;
292 m_hasCharacters = true;
293 }
294}
295
296template <bool FromDocument>
297void AccelTreeBuilder<FromDocument>::processingInstruction(const QXmlName &target,
298 const QString &data)
299{
300 startStructure();
301 ++m_preNumber;
302 m_document->data.insert(m_preNumber, data);
303
304 m_document->basicData.append(AccelTree::BasicNodeData(currentDepth(),
305 currentParent(),
306 QXmlNodeModelIndex::ProcessingInstruction,
307 0,
308 target));
309 ++m_size.top();
310 m_isPreviousAtomic = false;
311}
312
313template <bool FromDocument>
314void AccelTreeBuilder<FromDocument>::comment(const QString &content)
315{
316 startStructure();
317 m_document->basicData.append(AccelTree::BasicNodeData(currentDepth(), currentParent(), QXmlNodeModelIndex::Comment, 0));
318 ++m_preNumber;
319 m_document->data.insert(m_preNumber, content);
320 ++m_size.top();
321}
322
323template <bool FromDocument>
324void AccelTreeBuilder<FromDocument>::namespaceBinding(const QXmlName &nb)
325{
326 /* Note, because attribute() sometimes generate namespaceBinding() calls, this function
327 * can be called after attributes, in contrast to what the class documentation says. This is ok,
328 * as long as we're not dealing with public API. */
329
330 /* If we've received attributes, it means the element's size have changed and m_preNumber have advanced,
331 * so "reverse back" to the actual element. */
332 const AccelTree::PreNumber pn = m_preNumber - m_size.top();
333
334 QVector<QXmlName> &nss = m_document->namespaces[pn];
335
336 /* "xml" hasn't been declared for each node, AccelTree::namespaceBindings() adds it, so avoid it
337 * such that we don't get duplicates. */
338 if(nb.prefix() == StandardPrefixes::xml)
339 return;
340
341 /* If we already have the binding, skip it. */
342 const int len = nss.count();
343 for(int i = 0; i < len; ++i)
344 {
345 if(nss.at(i).prefix() == nb.prefix())
346 return;
347 }
348
349 nss.append(nb);
350}
351
352template <bool FromDocument>
353void AccelTreeBuilder<FromDocument>::startDocument()
354{
355 /* If we have already received nodes, we can't add a document node. */
356 if(m_preNumber == -1) /* -1 is our start value. */
357 {
358 m_size.push(0);
359 m_document->basicData.append(AccelTree::BasicNodeData(0, -1, QXmlNodeModelIndex::Document, -1));
360 ++m_preNumber;
361 m_ancestors.push(m_preNumber);
362 }
363 else
364 ++m_skippedDocumentNodes;
365
366 m_isPreviousAtomic = false;
367}
368
369template <bool FromDocument>
370void AccelTreeBuilder<FromDocument>::endDocument()
371{
372 if(m_skippedDocumentNodes == 0)
373 {
374 /* Create text nodes, if we've received any. We do this only if we're the
375 * top node because if we're getting this event as being a child of an element,
376 * text nodes or atomic values can appear after us, and which must get
377 * merged with the previous text.
378 *
379 * We call startStructure() before we pop the ancestor, such that the text node becomes
380 * a child of this document node. */
381 startStructure();
382
383 m_document->basicData.first().setSize(m_size.pop());
384 m_ancestors.pop();
385 }
386 else
387 --m_skippedDocumentNodes;
388
389 m_isPreviousAtomic = false;
390}
391
392template <bool FromDocument>
393void AccelTreeBuilder<FromDocument>::atomicValue(const QVariant &value)
394{
395 Q_UNUSED(value);
396 // TODO
397}
398
399template <bool FromDocument>
400QAbstractXmlNodeModel::Ptr AccelTreeBuilder<FromDocument>::builtDocument()
401{
402 /* Create a text node, if we have received text in some way. */
403 startStructure();
404 m_document->printStats(m_namePool);
405
406 return m_document;
407}
408
409template <bool FromDocument>
410NodeBuilder::Ptr AccelTreeBuilder<FromDocument>::create(const QUrl &baseURI) const
411{
412 Q_UNUSED(baseURI);
413 return NodeBuilder::Ptr(new AccelTreeBuilder(QUrl(), baseURI, m_namePool, m_context));
414}
415
416template <bool FromDocument>
417void AccelTreeBuilder<FromDocument>::startOfSequence()
418{
419}
420
421template <bool FromDocument>
422void AccelTreeBuilder<FromDocument>::endOfSequence()
423{
424}
425
426template <bool FromDocument>
427const SourceLocationReflection *AccelTreeBuilder<FromDocument>::actualReflection() const
428{
429 return this;
430}
431
432template <bool FromDocument>
433QSourceLocation AccelTreeBuilder<FromDocument>::sourceLocation() const
434{
435 if(m_documentURI.isEmpty())
436 return QSourceLocation(QUrl(QLatin1String("AnonymousNodeTree")));
437 else
438 return QSourceLocation(m_documentURI);
439}
440
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