--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/xmlpatterns/acceltree/qacceltreebuilder.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,440 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtXmlPatterns module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/**
+ * @file
+ * @short This file is included by qacceltreebuilder_p.h.
+ * If you need includes in this file, put them in qacceltreebuilder_p.h, outside of the namespace.
+ */
+
+template <bool FromDocument>
+AccelTreeBuilder<FromDocument>::AccelTreeBuilder(const QUrl &docURI,
+ const QUrl &baseURI,
+ const NamePool::Ptr &np,
+ ReportContext *const context,
+ Features features) : m_preNumber(-1)
+ , m_isPreviousAtomic(false)
+ , m_hasCharacters(false)
+ , m_isCharactersCompressed(false)
+ , m_namePool(np)
+ , m_document(new AccelTree(docURI, baseURI))
+ , m_skippedDocumentNodes(0)
+ , m_documentURI(docURI)
+ , m_context(context)
+ , m_features(features)
+{
+ Q_ASSERT(m_namePool);
+
+ /* TODO Perhaps we can merge m_ancestors and m_size
+ * into one, and store a struct for the two instead? */
+ m_ancestors.reserve(DefaultNodeStackSize);
+ m_ancestors.push(-1);
+
+ m_size.reserve(DefaultNodeStackSize);
+ m_size.push(0);
+}
+
+template <bool FromDocument>
+void AccelTreeBuilder<FromDocument>::startStructure()
+{
+ if(m_hasCharacters)
+ {
+ /* We create a node even if m_characters is empty.
+ * Remember that `text {""}' creates one text node
+ * with string value "". */
+
+ ++m_preNumber;
+ m_document->basicData.append(AccelTree::BasicNodeData(currentDepth(),
+ currentParent(),
+ QXmlNodeModelIndex::Text,
+ m_isCharactersCompressed ? AccelTree::IsCompressed : 0));
+ m_document->data.insert(m_preNumber, m_characters);
+ ++m_size.top();
+
+ m_characters.clear(); /* We don't want it added twice. */
+ m_hasCharacters = false;
+
+ if(m_isCharactersCompressed)
+ m_isCharactersCompressed = false;
+ }
+}
+
+template <bool FromDocument>
+void AccelTreeBuilder<FromDocument>::item(const Item &it)
+{
+ Q_ASSERT(it);
+
+ if(it.isAtomicValue())
+ {
+ if(m_isPreviousAtomic)
+ {
+ m_characters += QLatin1Char(' ');
+ m_characters += it.stringValue();
+ }
+ else
+ {
+ m_isPreviousAtomic = true;
+ const QString sv(it.stringValue());
+
+ if(!sv.isEmpty())
+ {
+ m_characters += sv;
+ m_hasCharacters = true;
+ }
+ }
+ }
+ else
+ sendAsNode(it);
+}
+
+template <bool FromDocument>
+void AccelTreeBuilder<FromDocument>::startElement(const QXmlName &name)
+{
+ startElement(name, 1, 1);
+}
+
+template <bool FromDocument>
+void AccelTreeBuilder<FromDocument>::startElement(const QXmlName &name, qint64 line, qint64 column)
+{
+ startStructure();
+
+ AccelTree::BasicNodeData data(currentDepth(), currentParent(), QXmlNodeModelIndex::Element, -1, name);
+ m_document->basicData.append(data);
+ if (m_features & SourceLocationsFeature)
+ m_document->sourcePositions.insert(m_document->maximumPreNumber(), qMakePair(line, column));
+
+ ++m_preNumber;
+ m_ancestors.push(m_preNumber);
+
+ ++m_size.top();
+ m_size.push(0);
+
+ /* With node constructors, we can receive names for which we have no namespace
+ * constructors, such as in the query '<xs:space/>'. Since the 'xs' prefix has no
+ * NamespaceConstructor in this case, we synthesize the namespace.
+ *
+ * In case we're constructing from an XML document we avoid the call because
+ * although it's redundant, it's on extra virtual call for each element. */
+ if(!FromDocument)
+ namespaceBinding(QXmlName(name.namespaceURI(), 0, name.prefix()));
+
+ m_isPreviousAtomic = false;
+}
+
+template <bool FromDocument>
+void AccelTreeBuilder<FromDocument>::endElement()
+{
+ startStructure();
+ const AccelTree::PreNumber index = m_ancestors.pop();
+ AccelTree::BasicNodeData &data = m_document->basicData[index];
+
+ /* Sub trees needs to be included in upper trees, so we add the count of this element
+ * to our parent. */
+ m_size[m_size.count() - 2] += m_size.top();
+
+ data.setSize(m_size.pop());
+ m_isPreviousAtomic = false;
+}
+
+template <bool FromDocument>
+void AccelTreeBuilder<FromDocument>::attribute(const QXmlName &name, const QStringRef &value)
+{
+ /* Attributes adds a namespace binding, so lets synthesize one.
+ *
+ * We optimize by checking whether we have a namespace for which a binding would
+ * be generated. Happens relatively rarely. */
+ if(name.hasPrefix())
+ namespaceBinding(QXmlName(name.namespaceURI(), 0, name.prefix()));
+
+ m_document->basicData.append(AccelTree::BasicNodeData(currentDepth(), currentParent(), QXmlNodeModelIndex::Attribute, 0, name));
+ ++m_preNumber;
+ ++m_size.top();
+
+ m_isPreviousAtomic = false;
+
+ if(name.namespaceURI() == StandardNamespaces::xml && name.localName() == StandardLocalNames::id)
+ {
+ const QString normalized(value.toString().simplified());
+
+ if(QXmlUtils::isNCName(normalized))
+ {
+ const QXmlName::LocalNameCode id = m_namePool->allocateLocalName(normalized);
+
+ const int oldSize = m_document->m_IDs.count();
+ m_document->m_IDs.insert(id, currentParent());
+ /* We don't run the value through m_attributeCompress here, because
+ * the likelyhood of it deing identical to another attribute is
+ * very small. */
+ m_document->data.insert(m_preNumber, normalized);
+
+ /**
+ * In the case that we're called for doc-available(), m_context is
+ * null, and we need to flag somehow that we failed to load this
+ * document.
+ */
+ if(oldSize == m_document->m_IDs.count() && m_context) // TODO
+ {
+ Q_ASSERT(m_context);
+ m_context->error(QtXmlPatterns::tr("An %1-attribute with value %2 has already been declared.")
+ .arg(formatKeyword("xml:id"),
+ formatData(normalized)),
+ FromDocument ? ReportContext::FODC0002 : ReportContext::XQDY0091,
+ this);
+ }
+ }
+ else if(m_context) // TODO
+ {
+ Q_ASSERT(m_context);
+
+ /* If we're building from an XML Document(e.g, we're fed from QXmlStreamReader, we raise FODC0002,
+ * otherwise XQDY0091. */
+ m_context->error(QtXmlPatterns::tr("An %1-attribute must have a "
+ "valid %2 as value, which %3 isn't.").arg(formatKeyword("xml:id"),
+ formatType(m_namePool, BuiltinTypes::xsNCName),
+ formatData(value.toString())),
+ FromDocument ? ReportContext::FODC0002 : ReportContext::XQDY0091,
+ this);
+ }
+ }
+ else
+ m_document->data.insert(m_preNumber, *m_attributeCompress.insert(value.toString()));
+}
+
+template <bool FromDocument>
+void AccelTreeBuilder<FromDocument>::characters(const QStringRef &ch)
+{
+
+ /* If a text node constructor appears by itself, a node needs to
+ * be created. Therefore, we set m_hasCharacters
+ * if we're the only node.
+ * However, if the text node appears as a child of a document or element
+ * node it is discarded if it's empty.
+ */
+ if(m_hasCharacters && m_isCharactersCompressed)
+ {
+ m_characters = CompressedWhitespace::decompress(m_characters);
+ m_isCharactersCompressed = false;
+ }
+
+ m_characters += ch;
+
+ m_isPreviousAtomic = false;
+ m_hasCharacters = !m_characters.isEmpty() || m_preNumber == -1; /* -1 is our start value. */
+}
+
+template <bool FromDocument>
+void AccelTreeBuilder<FromDocument>::whitespaceOnly(const QStringRef &ch)
+{
+ Q_ASSERT(!ch.isEmpty());
+ Q_ASSERT(ch.toString().trimmed().isEmpty());
+
+ /* This gets problematic due to how QXmlStreamReader works(which
+ * is the only one we get whitespaceOnly() events from). Namely, text intermingled
+ * with CDATA gets reported as individual Characters events, and
+ * QXmlStreamReader::isWhitespace() can return differently for each of those. However,
+ * it will occur very rarely, so this workaround of 1) mistakenly compressing 2) decompressing 3)
+ * appending, will happen infrequently.
+ */
+ if(m_hasCharacters)
+ {
+ if(m_isCharactersCompressed)
+ {
+ m_characters = CompressedWhitespace::decompress(m_characters);
+ m_isCharactersCompressed = false;
+ }
+
+ m_characters.append(ch.toString());
+ }
+ else
+ {
+ /* We haven't received a text node previously. */
+ m_characters = CompressedWhitespace::compress(ch);
+ m_isCharactersCompressed = true;
+ m_isPreviousAtomic = false;
+ m_hasCharacters = true;
+ }
+}
+
+template <bool FromDocument>
+void AccelTreeBuilder<FromDocument>::processingInstruction(const QXmlName &target,
+ const QString &data)
+{
+ startStructure();
+ ++m_preNumber;
+ m_document->data.insert(m_preNumber, data);
+
+ m_document->basicData.append(AccelTree::BasicNodeData(currentDepth(),
+ currentParent(),
+ QXmlNodeModelIndex::ProcessingInstruction,
+ 0,
+ target));
+ ++m_size.top();
+ m_isPreviousAtomic = false;
+}
+
+template <bool FromDocument>
+void AccelTreeBuilder<FromDocument>::comment(const QString &content)
+{
+ startStructure();
+ m_document->basicData.append(AccelTree::BasicNodeData(currentDepth(), currentParent(), QXmlNodeModelIndex::Comment, 0));
+ ++m_preNumber;
+ m_document->data.insert(m_preNumber, content);
+ ++m_size.top();
+}
+
+template <bool FromDocument>
+void AccelTreeBuilder<FromDocument>::namespaceBinding(const QXmlName &nb)
+{
+ /* Note, because attribute() sometimes generate namespaceBinding() calls, this function
+ * can be called after attributes, in contrast to what the class documentation says. This is ok,
+ * as long as we're not dealing with public API. */
+
+ /* If we've received attributes, it means the element's size have changed and m_preNumber have advanced,
+ * so "reverse back" to the actual element. */
+ const AccelTree::PreNumber pn = m_preNumber - m_size.top();
+
+ QVector<QXmlName> &nss = m_document->namespaces[pn];
+
+ /* "xml" hasn't been declared for each node, AccelTree::namespaceBindings() adds it, so avoid it
+ * such that we don't get duplicates. */
+ if(nb.prefix() == StandardPrefixes::xml)
+ return;
+
+ /* If we already have the binding, skip it. */
+ const int len = nss.count();
+ for(int i = 0; i < len; ++i)
+ {
+ if(nss.at(i).prefix() == nb.prefix())
+ return;
+ }
+
+ nss.append(nb);
+}
+
+template <bool FromDocument>
+void AccelTreeBuilder<FromDocument>::startDocument()
+{
+ /* If we have already received nodes, we can't add a document node. */
+ if(m_preNumber == -1) /* -1 is our start value. */
+ {
+ m_size.push(0);
+ m_document->basicData.append(AccelTree::BasicNodeData(0, -1, QXmlNodeModelIndex::Document, -1));
+ ++m_preNumber;
+ m_ancestors.push(m_preNumber);
+ }
+ else
+ ++m_skippedDocumentNodes;
+
+ m_isPreviousAtomic = false;
+}
+
+template <bool FromDocument>
+void AccelTreeBuilder<FromDocument>::endDocument()
+{
+ if(m_skippedDocumentNodes == 0)
+ {
+ /* Create text nodes, if we've received any. We do this only if we're the
+ * top node because if we're getting this event as being a child of an element,
+ * text nodes or atomic values can appear after us, and which must get
+ * merged with the previous text.
+ *
+ * We call startStructure() before we pop the ancestor, such that the text node becomes
+ * a child of this document node. */
+ startStructure();
+
+ m_document->basicData.first().setSize(m_size.pop());
+ m_ancestors.pop();
+ }
+ else
+ --m_skippedDocumentNodes;
+
+ m_isPreviousAtomic = false;
+}
+
+template <bool FromDocument>
+void AccelTreeBuilder<FromDocument>::atomicValue(const QVariant &value)
+{
+ Q_UNUSED(value);
+ // TODO
+}
+
+template <bool FromDocument>
+QAbstractXmlNodeModel::Ptr AccelTreeBuilder<FromDocument>::builtDocument()
+{
+ /* Create a text node, if we have received text in some way. */
+ startStructure();
+ m_document->printStats(m_namePool);
+
+ return m_document;
+}
+
+template <bool FromDocument>
+NodeBuilder::Ptr AccelTreeBuilder<FromDocument>::create(const QUrl &baseURI) const
+{
+ Q_UNUSED(baseURI);
+ return NodeBuilder::Ptr(new AccelTreeBuilder(QUrl(), baseURI, m_namePool, m_context));
+}
+
+template <bool FromDocument>
+void AccelTreeBuilder<FromDocument>::startOfSequence()
+{
+}
+
+template <bool FromDocument>
+void AccelTreeBuilder<FromDocument>::endOfSequence()
+{
+}
+
+template <bool FromDocument>
+const SourceLocationReflection *AccelTreeBuilder<FromDocument>::actualReflection() const
+{
+ return this;
+}
+
+template <bool FromDocument>
+QSourceLocation AccelTreeBuilder<FromDocument>::sourceLocation() const
+{
+ if(m_documentURI.isEmpty())
+ return QSourceLocation(QUrl(QLatin1String("AnonymousNodeTree")));
+ else
+ return QSourceLocation(m_documentURI);
+}
+